阅读说明：本技术 一种异形工件自动折弯装置 (Automatic bending device for special-shaped workpiece ) 是由 孙绵玉 石贤林 石贤锋 郑志敏 郑盼盼 陶树仁 舒克建 于 2021-09-24 设计创作，主要内容包括：本发明公开了一种异形工件自动折弯装置,包括折弯机、数控系统、阀组、工作台、上模、下模、右油缸、左油缸、前支撑系统、后支撑系统、前送料机构、后送料机构、前档定位机构、后挡定位机构和模芯定位机构,在工作台的前后分别设置扇环结构的前送料机构和后送料机构,通过前档定位机构和后挡定位机构一起对待折板材进行夹紧定位,再由前送料机构、后送料机构和模芯定位机构的协同配合作用,使得待折板材的折弯线依次对准折弯机的折弯中心线,按a、b、c、d、e、f、g、h、i、j、k、l、m顺序完成自动化定位折弯工作,自动化程度高,折弯效率和精度高。(The invention discloses an automatic bending device for special-shaped workpieces, which comprises a bending machine, a numerical control system, a valve group, a workbench, an upper die, a lower die, a right oil cylinder, a left oil cylinder, a front support system, a rear support system, a front feeding mechanism, a rear feeding mechanism, a front gear positioning mechanism, a rear gear positioning mechanism and a die core positioning mechanism, the front and the back of the workbench are respectively provided with a front feeding mechanism and a back feeding mechanism with fan-ring structures, the plate to be folded is clamped and positioned by the front baffle positioning mechanism and the back baffle positioning mechanism, and then the front feeding mechanism, the back feeding mechanism and the mold core positioning mechanism are cooperated, the bending line of the plate to be bent is sequentially aligned with the bending central line of the bending machine, automatic positioning bending work is completed according to the sequence of a, b, c, d, e, f, g, h, i, j, k, l and m, the automation degree is high, and the bending efficiency and precision are high.)

1. The utility model provides an automatic bending device of dysmorphism work piece which characterized in that: comprises a bending machine (1), a numerical control system (2), a valve group (3), a workbench (4), an upper die (5), a lower die (6), a right oil cylinder (7), a left oil cylinder (8), a front support system (9), a rear support system (10), a front feeding mechanism (11), a rear feeding mechanism (12), a front gear positioning mechanism (13), a rear gear positioning mechanism (14) and a die core (155) positioning mechanism (15), wherein the numerical control system (2) is connected with the side surface of the bending machine (1), the valve group (3) is connected with the bending machine (1), the workbench (4) is arranged below the upper die (5), the upper die (5) is connected with the bending machine (1) in a lifting way, the lower die (6) is fixedly connected with the workbench (4), the right oil cylinder (7) is connected with the upper end of the bending machine (1), the lower end of a piston rod of the right oil cylinder (7) is connected with the right side of the upper die (5), left side hydro-cylinder (8) are connected with bender (1) upper end, the piston rod lower extreme of left side hydro-cylinder (8) is connected with last mould (5) left side, before workstation (4) is located in preceding braced system (9), workstation (4) back is located in back braced system (10), preceding feeding mechanism (11) are connected with preceding braced system (9), back feeding mechanism (12) are connected with back braced system (10), preceding shelves positioning mechanism (13) are connected with preceding feeding mechanism (11) side, keep off positioning mechanism (14) after and be connected feeding mechanism (12) side, mold core (155) positioning mechanism (15) are connected with workstation (4).

2. The automatic bending device for the special-shaped workpiece according to claim 1, characterized in that: the right oil cylinder (7) is smaller than the left oil cylinder (8).

3. The automatic bending device for the special-shaped workpiece according to claim 1, characterized in that: the front support system (9) and the rear support system (10) are arranged symmetrically with respect to the work table (4).

4. The automatic bending device for the special-shaped workpiece according to claim 1, characterized in that: preceding braced system (9) and back braced system (10) all comprise bracing piece (90), support (91), mesa (92) and spin (93), bracing piece (90) are connected with ground, support (91) and bracing piece (90) upper end fastening connection, mesa (92) and support (91) upper end fastening connection, spin (93) are equipped with a plurality ofly, and with mesa (92) roll connection.

5. The automatic bending device for the special-shaped workpiece according to claim 4, wherein: the table-board (92) is of a fan-ring structure.

6. The automatic bending device for the special-shaped workpiece according to claim 1, characterized in that: the front feeding mechanism (11) comprises a front arc-shaped guide rail (110), a front sliding block (111), a front arc-shaped rack (112), a front sliding seat (113), a front motor (114), a front gear (115) and a front retaining column (116), the front arc-shaped guide rail (110) is fixedly connected with a table top (92) in the front support system (9), the front sliding block (111) is connected with the front arc-shaped guide rail (110) in a sliding way, the front arc-shaped rack (112) and the front arc-shaped guide rail (110) are concentrically arranged, and is fastened and connected with a table top (92) in the front supporting system (9), the front sliding seat (113) is fastened and connected with the front sliding block (111), the front motor (114) is fixedly connected with the front sliding seat (113), the front gear (115) is coaxially and rotatably connected with the output shaft of the front motor (114), and is meshed with the front arc-shaped rack (112), and the front stop pillar (116) is fixedly connected with the front sliding seat (113).

7. The automatic bending device for the special-shaped workpiece according to claim 1, characterized in that: the rear feeding mechanism (12) comprises a rear arc-shaped guide rail (120), a rear sliding block (121), a rear arc-shaped rack (122), a rear sliding seat (123), a rear motor (124), a rear gear (125) and a rear catch column (126), the rear arc-shaped guide rail (120) is fixedly connected with a table top (92) in the rear supporting system (10), the rear sliding block (121) is connected with the rear arc-shaped guide rail (120) in a sliding way, the rear arc-shaped rack (122) and the rear arc-shaped guide rail (120) are concentrically arranged, and is fastened and connected with a table top (92) in the rear supporting system (10), the rear sliding seat (123) is fastened and connected with the rear sliding block (121), the rear motor (124) is fixedly connected with the rear sliding seat (123), the rear gear (125) is coaxially and rotatably connected with the output shaft of the rear motor (124), and is meshed with the rear arc-shaped rack (122), and the rear stop pillar (126) is fixedly connected with the rear sliding seat (123).

8. The automatic bending device for the special-shaped workpiece according to claim 6, wherein: the front gear positioning mechanism (13) comprises a first outrigger (130), a first spur rack (131), a first support plate (132), a first roller (133), a first servo motor (134), a first gear (135), a first cylinder (136) and a first positioning retaining column (137), the first outrigger (130) is fixedly connected with the side surface of the front sliding seat (113), the first spur rack (131) is fixedly connected with the lower end of the first outrigger (130), the first outrigger (130) is provided with a first opening waist-shaped hole (130-1), the upper end of the first support plate (132) penetrates through the first opening waist-shaped hole (130-1), the first roller (133) is connected with the upper end of the first support plate (132) and arranged in the first opening waist-shaped hole (130-1) to roll, the first servo motor (134) is fixedly connected with the first support plate (132), the first gear (135) is coaxially and rotatably connected with an output shaft of the first servo motor (134), and is meshed with the first straight rack (131), the cylinder body end of the first cylinder (136) is hinged with the first support plate (132), the piston rod end of the first cylinder (136) is hinged with the side surface of the first positioning retaining column (137), and the lower end of the first positioning retaining column (137) is hinged with the upper end of the first support plate (132).

9. The automatic bending device for the special-shaped workpiece according to claim 7, wherein: the rear gear positioning mechanism (14) comprises a second outrigger (140), a second spur rack (141), a second support plate (142), a second roller (143), a second servo motor (144), a second gear (145), a second cylinder (146) and a second positioning retaining column (147), the second outrigger (140) is fixedly connected with the side surface of the rear sliding seat (123), the second spur rack (141) is fixedly connected with the lower end of the second outrigger (140), the second outrigger (140) is provided with a second open waist-shaped hole (140-1), the upper end of the second support plate (142) penetrates through the second open waist-shaped hole (140-1), the second roller (143) is connected with the upper end of the second support plate (142) and is arranged in the second open waist-shaped hole (140-1) to roll, the second servo motor (144) is fixedly connected with the second support plate (142), the second gear (145) is coaxially and rotatably connected with an output shaft of the second servo motor (144), and the lower end of the second positioning baffle column (147) is hinged with the upper end of the second support plate (142).

10. The automatic bending device for the special-shaped workpiece according to claim 1, characterized in that: mold core (155) positioning mechanism (15) includes frame (150), three (151) of servo motor, worm (152), worm wheel (153), ejection cylinder (154) and mold core (155), frame (150) and workstation (4) fastening connection, three (151) of servo motor and frame (150) fastening connection, worm (152) are connected with the coaxial rotation of output shaft of three (151) of servo motor, worm (152) and worm wheel (153) meshing, ejection cylinder (154) are connected with frame (150) upper end, the eccentric locating hole (153-1) that is equipped with on worm wheel (153), the piston rod lower extreme of ejection cylinder (154) inserts in locating hole (153-1), the piston rod upper end of ejection cylinder (154) is connected with mold core (155).

Technical Field

The invention belongs to the technical field of forging machine tool bending machines, and particularly relates to an automatic bending device for a special-shaped workpiece.

Background

Present bender runs into panel beating special-shaped workpiece of last circle below, can't realize the operation of bending, and the main problem that faces is as follows:

firstly, the method comprises the following steps: the plate of the special-shaped workpiece needs to be rotated in an arc on the workbench, but the feeding of the existing bending machine is linear motion back and forth; in addition, the crease on the plate of the special-shaped workpiece is in the shape of a bevel edge, and compared with the traditional straight edge shape, the automatic positioning function cannot be realized in the bending process.

Secondly, the method comprises the following steps: however, creases on a plate of the special-shaped workpiece are all in the shape of bevel edges, and bending stress points are required to be uneven, but the left side and the right side of the existing bending machine are same in oil cylinder pressure, so that the left side and the right side are consistent in pressure, and the special-shaped workpiece cannot be bent and formed in place.

Thirdly, the method comprises the following steps: when a thick plate is adopted to bend a special-shaped workpiece, the lower notch of the lower die cannot be selected according to a standard coefficient, the lower notch is selected too small, the bending pressure is too large, and the equipment is easy to deform under pressure; the lower die opening is selected according to the standard, the bending lap edge can not be reached, the workpiece can not be hung on the edge, and the three-point stress bending can not be realized.

Disclosure of Invention

The invention provides an automatic bending device for a special-shaped workpiece, which aims to solve the technical problems in the background technology.

In order to achieve the purpose, the invention adopts the technical scheme that: an automatic bending device for special-shaped workpieces comprises a bending machine, a numerical control system, a valve bank, a workbench, an upper die, a lower die, a right oil cylinder, a left oil cylinder, a front supporting system, a rear supporting system, a front feeding mechanism, a rear feeding mechanism, a front gear positioning mechanism, a rear gear positioning mechanism and a die core positioning mechanism, wherein the numerical control system is connected with the side face of the bending machine, the valve bank is connected with the bending machine, the workbench is arranged below the upper die, the upper die is connected with the bending machine in a lifting manner, the lower die is fixedly connected with the workbench, the right oil cylinder is connected with the upper end of the bending machine, the lower end of a piston rod of the right oil cylinder is connected with the right side of the upper die, the left oil cylinder is connected with the upper end of the bending machine, the lower end of the piston rod of the left oil cylinder is connected with the left side of the upper die, the front supporting system is arranged in front of the workbench, the rear supporting system is arranged behind the workbench, the front feeding mechanism is connected with the front supporting system, the rear feeding mechanism is connected with the rear supporting system, the front gear positioning mechanism is connected with the side face of the front feeding mechanism, the rear gear positioning mechanism is connected with the side face of the rear feeding mechanism, and the mold core positioning mechanism is connected with the workbench.

Preferably, the right oil cylinder is smaller than the left oil cylinder in design.

Preferably, the front support system and the rear support system are symmetrically arranged with respect to the work table.

Preferably, the front supporting system and the rear supporting system are composed of supporting rods, supports, a table board and rolling balls, the supporting rods are connected with the ground, the supports are fixedly connected with the upper ends of the supporting rods, the table board is fixedly connected with the upper ends of the supports, and the rolling balls are arranged in a plurality and are in rolling connection with the table board.

Preferably, the table-board is a fan-ring structure.

Preferably, the front feeding mechanism comprises a front arc-shaped guide rail, a front sliding block, a front arc-shaped rack, a front sliding seat, a front motor, a front gear and a front blocking column, the front arc-shaped guide rail is fixedly connected with a table top in a front supporting system, the front sliding block is slidably connected with the front arc-shaped guide rail, the front arc-shaped rack is concentrically installed with the front arc-shaped guide rail and is fixedly connected with the table top in the front supporting system, the front sliding seat is fixedly connected with the front sliding block, the front motor is fixedly connected with the front sliding seat, the front gear is coaxially rotatably connected with an output shaft of the front motor and is meshed with the front arc-shaped rack, and the front blocking column is fixedly connected with the front sliding seat.

Preferably, back feed mechanism includes back arc guide rail, back slider, back arc rack, back slide, back motor, rear gear and back bumping post, mesa fastening connection in back arc guide rail and the back braced system, back slider and back arc guide rail sliding connection, back arc rack and the concentric installation of back arc guide rail, and with mesa fastening connection in the back braced system, back slide and back slider fastening connection, back motor and back slide fastening connection, the output shaft coaxial rotation of back gear and back motor is connected, and with back arc rack toothing, back bumping post and back slide fastening connection.

Preferably, the front gear positioning mechanism comprises a first outrigger, a first spur rack, a first support plate, a first roller, a first servo motor, a first gear, a first cylinder and a first positioning retaining column, the first outrigger is fixedly connected with the side surface of the front sliding seat, the first spur rack is fixedly connected with the lower end of the outrigger, the first outrigger is provided with a first opening waist-shaped hole, the upper end of the first support plate penetrates through the first opening waist-shaped hole, the first roller is connected with the upper end of the first support plate and is arranged in the first opening waist-shaped hole to roll, the first servo motor is fixedly connected with the first support plate, the first gear is coaxially rotatably connected with an output shaft of the first servo motor and is meshed with the first spur rack, the first cylinder body end of the first cylinder is hinged with the first support plate, the first piston rod end of the first cylinder is hinged with a side surface of the positioning retaining column, and the lower end of the positioning retaining column is hinged with the upper end of the first support plate.

Preferably, the rear gear positioning mechanism comprises a second outrigger, a second straight rack, a second support plate, a second roller, a second servo motor, a second gear, a second cylinder and a second positioning retaining column, the second outrigger is fixedly connected with the side surface of the rear sliding seat, the second straight rack is fixedly connected with the lower end of the second outrigger, the second outrigger is provided with a second opening waist-shaped hole, the upper end of the second support plate penetrates through the second opening waist-shaped hole, the second roller is connected with the upper end of the second support plate and is arranged to roll in the second opening waist-shaped hole, the second servo motor is fixedly connected with the second support plate, the second gear is coaxially rotatably connected with an output shaft of the second servo motor and is meshed with the second straight rack, the cylinder body end of the second cylinder is hinged with the second support plate, the piston rod end of the second cylinder is hinged with the two side surfaces of the positioning retaining column, and the lower end of the second positioning retaining column is hinged with the upper end of the second support plate.

Preferably, the mold core positioning mechanism comprises a machine base, a third servo motor, a worm wheel, an ejection cylinder and a mold core, the machine base is fixedly connected with the workbench, the third servo motor is fixedly connected with the machine base, the worm is coaxially and rotatably connected with an output shaft of the third servo motor, the worm is meshed with the worm wheel, the ejection cylinder is connected with the upper end of the machine base, a positioning hole is eccentrically formed in the worm wheel, the lower end of a piston rod of the ejection cylinder is inserted into the positioning hole, and the upper end of the piston rod of the ejection cylinder is connected with the mold core.

The beneficial effect of adopting above technical scheme is:

1. according to the automatic special-shaped workpiece bending device, a bending machine is started, each mechanism is enabled to reach the original point position through a numerical control system, a plate to be bent is placed on a table board, the plate to be bent is supported by rolling balls on the table board, and then a front gear positioning mechanism and a rear gear positioning mechanism are started to work.

A piston rod of a first air cylinder in the front gear positioning mechanism extends out to drive a first positioning retaining column to rotate from a horizontal state to a vertical state, and then a first servo motor and a first driving gear rotate along a first straight rack, so that a first supporting plate and a first roller on the first supporting plate drive the first servo motor, the first gear, the first air cylinder and the first positioning retaining column to move inwards along a first opening waist-shaped hole until the first positioning retaining column clamps a plate to be folded.

And a piston rod of a second cylinder in the rear gear positioning mechanism extends out to drive a second positioning retaining column to rotate to a vertical state from a horizontal state, and then the second gear is driven by a second servo motor to rotate along a second spur rack, so that the second supporting plate and the second roller on the second supporting plate drive the second servo motor, the second gear, the second cylinder and the second positioning retaining column to move inwards along a second opening waist-shaped hole until the second positioning retaining column clamps the plate to be folded.

And then starting the front feeding mechanism and the rear feeding mechanism to work.

A front motor in the front feeding mechanism drives a front gear to rotate clockwise, and a front sliding block and a front sliding seat drive a front stop post to move anticlockwise under the restraint of a front arc-shaped rack and a front arc-shaped guide rail until the front stop post clamps a plate to be folded.

And a rear motor in the rear feeding mechanism drives a rear gear to rotate anticlockwise, and a rear sliding block and a rear sliding seat drive a rear stop pillar to move clockwise under the restraint of a rear arc-shaped rack and a rear arc-shaped guide rail until the rear stop pillar clamps the plate to be folded.

A location bumping post is one, a location bumping post two, two preceding bumping posts, two back bumping posts will treat to roll over panel and clip, carry out the first line location of bending, even go up the mould and just treating the line a of bending on the panel.

Then, the right oil cylinder and the left oil cylinder are driven to work through the automatic control valve group of the numerical control system, the right oil cylinder and the left oil cylinder push the upper sliding block at the end part of the piston rod of the right oil cylinder and the left oil cylinder to move downwards, the upper die moves downwards along with the upper sliding block to start pressing a plate to be folded, a bending workpiece with a first fold is formed, and then the upper die moves upwards along with the upper sliding block.

And then, starting the mold core positioning mechanism to work, wherein a piston rod of an ejection cylinder in the mold core positioning mechanism extends out, the mold core is ejected to be inserted into a crack preventing groove of the bending workpiece forming the first crease, and the bending workpiece forming the first crease is ejected, so that the bending line of the bending workpiece forming the first crease can be more accurately aligned to the upper mold.

And then the front feeding mechanism and the rear feeding mechanism are started again to work.

The front motor in the front feeding mechanism drives the front gear to rotate clockwise for an angle, the front sliding block and the front sliding seat drive the front retaining column to move anticlockwise for an arc length under the restraint of the front arc-shaped rack and the front arc-shaped guide rail, and the front retaining column pushes a bending workpiece forming a first crease to rotate anticlockwise; meanwhile, a rear motor in the rear feeding mechanism drives a rear gear to rotate clockwise for an angle, and a rear sliding block and a rear sliding seat drive a rear stop pillar to move anticlockwise for an arc length under the restraint of a rear arc-shaped rack and a rear arc-shaped guide rail; meanwhile, a servo motor tee in the mold core positioning mechanism drives a worm wheel to drive the mold core inserted into the positioning hole to move through a worm; under the cooperative action of the front motor, the rear motor and the servo motor III, the upper die is opposite to the bending line b on the plate to be bent.

And then starting the mold core positioning mechanism to work, wherein a piston rod of an ejection cylinder in the mold core positioning mechanism contracts to contract the mold core, so that the bending workpiece forming the first crease falls back to the lower mold, even if the upper mold is just opposite to the bending line b on the bending workpiece forming the first crease.

And then, the numerical control system automatically controls the valve group again to drive the right oil cylinder and the left oil cylinder to work, the right oil cylinder and the left oil cylinder push the upper sliding block at the end part of the piston rod of the right oil cylinder and the left oil cylinder to move downwards, the upper die moves downwards along with the upper sliding block, the bending workpiece with the first crease is pressed to form the bending workpiece with the second crease, and then the upper die moves upwards along with the upper sliding block. And repeating the process, and sequentially bending the c bending line, the d bending line, the e bending line and the f bending line.

And then reversing, sequentially stepping and clockwise moving the two rear retaining columns by one arc length, sequentially stepping and clockwise moving the two front retaining columns by one arc length, and sequentially bending g, h, i, j, k, l and m bending lines under the cooperative action of the front motor, the rear motor and the servo motor until the bending work is finished.

According to the automatic special-shaped workpiece bending device, the front feeding mechanism and the rear feeding mechanism of the fan-ring structure are respectively arranged in front of and behind the workbench, a plate to be bent is clamped and positioned through the front stop positioning mechanism and the rear stop positioning mechanism, and then the bending line of the plate to be bent is sequentially aligned to the bending central line of the bending machine under the cooperative action of the front feeding mechanism, the rear feeding mechanism and the mold core positioning mechanism, so that automatic positioning bending work is completed according to the sequence of a, b, c, d, e, f, g, h, i, j, k, l and m, the automatic bending device is high in automation degree, and bending efficiency and precision.

According to the automatic special-shaped workpiece bending device, the arc rotation of a plate to be bent of a special-shaped workpiece on the workbench is realized through the cooperative action of the front feeding mechanism, the rear feeding mechanism and the mold core positioning mechanism.

2. The right oil cylinder is smaller than the left oil cylinder, the left die orifice of the lower die is smaller, the right die orifice is larger, and the bending force on the left side is far greater than the bending force on the right side, so that the pressure of the right oil cylinder is smaller than that of the left oil cylinder, and the left plate to be folded can be conveniently molded. The problem of special-shaped workpiece wait to roll over crease on the panel all be the hypotenuse shape, require the stress point inhomogeneous of bending is solved, guaranteed that special-shaped workpiece can't bend the shaping and target in place.

3. A piston rod of a first air cylinder in the front gear positioning mechanism extends out to drive a first positioning retaining column to rotate to a vertical state from a horizontal state, and then a first servo motor and a first driving gear rotate along a first straight rack, so that a first supporting plate and a first roller on the first supporting plate drive the first servo motor, the first gear, the first air cylinder and the first positioning retaining column to move inwards along a first opening waist-shaped hole until the first positioning retaining column clamps a plate to be folded.

And a piston rod of a second cylinder in the rear gear positioning mechanism extends out to drive a second positioning retaining column to rotate to a vertical state from a horizontal state, and then the second gear is driven by a second servo motor to rotate along a second straight rack, so that the second supporting plate and the second roller on the second supporting plate drive the second servo motor, the second gear, the second cylinder and the second positioning retaining column to move inwards along a second opening waist-shaped hole until the second positioning retaining column clamps a plate to be folded.

The front gear positioning mechanism and the rear gear positioning mechanism can be suitable for positioning dimensional errors caused by tilting of plates to be folded and workpieces after being folded in various specifications and sizes.

4. The upper die is formed by combining a plurality of independent upper dies, and the lower die is formed by combining a plurality of independent lower dies, so that the lower die opening is selected according to the standard, the bending lap is in place, and the three-point stress bending can be realized.

Drawings

FIG. 1 is a front view of an automatic bending apparatus for irregular-shaped workpieces according to the present invention;

FIG. 2 is a right side view of the automatic bending apparatus for irregular-shaped workpieces of the present invention;

FIG. 3 is a top view of the automatic bending apparatus for irregular-shaped workpieces of the present invention;

FIG. 4 is a front view of the front positioning mechanism;

FIG. 5 is a top view of the front stop positioning mechanism;

FIG. 6 is a front view of the rear positioning mechanism;

FIG. 7 is a top view of the rear positioning mechanism;

FIG. 8 is a front view of the core positioning mechanism;

FIG. 9 is a top view of the core positioning mechanism;

FIG. 10 is a schematic view of a workpiece;

FIG. 11 is a schematic view of a workpiece in a bent state;

wherein:

1. bending machine; 2. a numerical control system; 3. a valve block; 4. a work table; 5. an upper die; 6. a lower die; 7. a right cylinder; 8. a left oil cylinder; 9. a front support system; 10. a rear support system; 11. a front feeding mechanism; 12. a rear feeding mechanism; 13. a front gear positioning mechanism; 14. a rear gear positioning mechanism; 15. a mold core positioning mechanism;

90. a support bar; 91. a support; 92. a table top; 93. rolling a ball;

110. a front arc guide rail; 111. a front slider; 112. a front arc rack; 113. a front slide; 114. a front motor; 115. a front gear; 116. a front fender post;

120. a rear arcuate guide rail; 121. a rear slider; 122. a rear arc rack; 123. a rear slide seat; 124. a rear motor; 125. a rear gear; 126. a rear fender post;

130. a first outrigger; 130-1, opening a waist-shaped hole I; 131. a first straight rack; 132. a first support plate; 133. a first roller; 134. a first servo motor; 135. a first gear; 136. a first cylinder; 137. positioning a first retaining column;

140. a second outrigger; 140-1 and a second opening waist-shaped hole; 141. a second straight rack; 142. a second support plate; 143. a second roller; 144. a servo motor II; 145. a second gear; 146. a second air cylinder; 147. positioning a second catch column;

150. a machine base; 151. a servo motor III; 152. a worm; 153. a worm gear; 153-1, positioning holes; 154. ejecting out the cylinder; 155. and (5) a mold core.

Detailed Description

The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for a purpose of helping those skilled in the art to more fully, accurately and deeply understand the concept and technical solution of the present invention and to facilitate its implementation.

As shown in fig. 1 to 11, the invention is an automatic special-shaped workpiece bending device, wherein a front feeding mechanism and a rear feeding mechanism with fan-ring structures are respectively arranged in front of and behind a workbench, a plate to be bent is clamped and positioned by a front stop positioning mechanism and a rear stop positioning mechanism, and then the bending line of the plate to be bent is sequentially aligned with the bending central line of a bending machine under the cooperative action of the front feeding mechanism, the rear feeding mechanism and a mold core positioning mechanism, so that the automatic positioning bending work is completed according to a, b, c, d, e, f, g, h, i, j, k, l and m, and the automatic positioning bending device has high automation degree, and high bending efficiency and precision.

Specifically, as shown in fig. 1 to 11, the bending machine comprises a bending machine 1, a numerical control system 2, a valve group 3, a workbench 4, an upper die 5, a lower die 6, a right oil cylinder 7, a left oil cylinder 8, a front support system 9, a rear support system 10, a front feeding mechanism 11, a rear feeding mechanism 12, a front gear positioning mechanism 13, a rear gear positioning mechanism 14 and a die core 155 positioning mechanism 15, wherein the numerical control system 2 is connected with the side surface of the bending machine 1, the valve group 3 is connected with the bending machine 1, the workbench 4 is arranged below the upper die 5, the upper die 5 is connected with the bending machine 1 in a lifting manner, the lower die 6 is fixedly connected with the workbench 4, the right oil cylinder 7 is connected with the upper end of the bending machine 1, the lower end of a piston rod of the right oil cylinder 7 is connected with the right side of the upper die 5, the left oil cylinder 8 is connected with the upper end of the bending machine 1, the lower end of a piston rod of the left oil cylinder 8 is connected with the left side of the upper die 5, the front support system 9 is arranged in front of the workbench 4, after workstation 4 is located to back braced system 10, preceding feeding mechanism 11 is connected with preceding braced system 9, back feeding mechanism 12 is connected with back braced system 10, preceding shelves positioning mechanism 13 is connected with preceding feeding mechanism 11 side, backstop positioning mechanism 14 is connected with back feeding mechanism 12 side, mold core 155 positioning mechanism 15 is connected with workstation 4.

The right oil cylinder 7 is designed to be smaller than the left oil cylinder 8.

The front support system 9 and the rear support system 10 are arranged symmetrically with respect to the table 4.

The front supporting system 9 and the rear supporting system 10 are composed of a supporting rod 90, a support 91, a table top 92 and a rolling ball 93, the supporting rod 90 is connected with the ground, the support 91 is fixedly connected with the upper end of the supporting rod 90, the table top 92 is fixedly connected with the upper end of the support 91, and the rolling ball 93 is provided with a plurality of rolling balls and is in rolling connection with the table top 92.

The table 92 is a fan ring structure.

The front feeding mechanism 11 comprises a front arc-shaped guide rail 110, a front sliding block 111, a front arc-shaped rack 112, a front sliding seat 113, a front motor 114, a front gear 115 and a front stop column 116, wherein the front arc-shaped guide rail 110 is fixedly connected with a table top 92 in the front supporting system 9, the front sliding block 111 is slidably connected with the front arc-shaped guide rail 110, the front arc-shaped rack 112 is concentrically installed with the front arc-shaped guide rail 110 and is fixedly connected with the table top 92 in the front supporting system 9, the front sliding seat 113 is fixedly connected with the front sliding block 111, the front motor 114 is fixedly connected with the front sliding seat 113, the front gear 115 is coaxially and rotatably connected with an output shaft of the front motor 114 and is meshed with the front arc-shaped rack 112, and the front stop column 116 is fixedly connected with the front sliding seat 113.

The rear feeding mechanism 12 comprises a rear arc-shaped guide rail 120, a rear sliding block 121, a rear arc-shaped rack 122, a rear sliding seat 123, a rear motor 124, a rear gear 125 and a rear stop pillar 126, the rear arc-shaped guide rail 120 is fixedly connected with a table top 92 in the rear support system 10, the rear sliding block 121 is slidably connected with the rear arc-shaped guide rail 120, the rear arc-shaped rack 122 is concentrically installed with the rear arc-shaped guide rail 120 and is fixedly connected with the table top 92 in the rear support system 10, the rear sliding seat 123 is fixedly connected with the rear sliding block 121, the rear motor 124 is fixedly connected with the rear sliding seat 123, the rear gear 125 is coaxially rotatably connected with an output shaft of the rear motor 124 and is meshed with the rear arc-shaped rack 122, and the rear stop pillar 126 is fixedly connected with the rear sliding seat 123.

The front gear positioning mechanism 13 comprises a first outrigger 130, a first spur rack 131, a first support plate 132, a first roller 133, a first servo motor 134, a first gear 135, a first cylinder 136 and a first positioning retaining column 137, the first outrigger 130 is fastened to the side of the front slide carriage 113, the first spur rack 131 is fastened to the lower end of the first outrigger 130, the first outrigger 130 is provided with a first open waist-shaped hole 130-1, the upper end of the first support plate 132 penetrates through the first open waist-shaped hole 130-1, the first roller 133 is connected to the upper end of the first support plate 132 and is arranged in the first open waist-shaped hole 130-1 to roll, the first servo motor 134 is fastened to the first support plate 132, the first gear 135 is coaxially and rotatably connected to an output shaft of the first servo motor 134 and is engaged with the first spur rack 131, the cylinder end of the first cylinder 136 is hinged to the first support plate 132, the piston rod end of the first cylinder 136 is hinged to the side of the first positioning retaining column 137, the lower end of the first positioning retaining column 137 is hinged with the upper end of the first support plate 132.

The rear gear positioning mechanism 14 comprises a second outrigger 140, a second spur rack 141, a second support plate 142, a second roller 143, a second servo motor 144, a second gear 145, a second cylinder 146 and a second positioning retaining column 147, the second outrigger 140 is fastened to the side surface of the rear slide 123, the second spur rack 141 is fastened to the lower end of the second outrigger 140, the second outrigger 140 is provided with a second open waist-shaped hole 140-1, the upper end of the second support plate 142 penetrates through the second open waist-shaped hole 140-1, the second roller 143 is connected to the upper end of the second support plate 142 and is arranged in the second open waist-shaped hole 140-1 to roll, the second servo motor 144 is fastened to the second support plate 142, the second gear 145 is coaxially and rotatably connected to an output shaft of the second servo motor 144 and is engaged with the second spur rack 141, a cylinder end of the second cylinder 146 is hinged to the second support plate 142, a piston rod end of the second cylinder 146 is hinged to the side surface of the second positioning retaining column 147, the lower end of the second positioning baffle column 147 is hinged with the upper end of the second support plate 142.

The mold core 155 positioning mechanism 15 comprises a machine base 150, three servo motors 151, a worm 152, a worm wheel 153, an ejection cylinder 154 and a mold core 155, the machine base 150 is fixedly connected with the workbench 4, the three servo motors 151 are fixedly connected with the machine base 150, the worm 152 is coaxially and rotatably connected with output shafts of the three servo motors 151, the worm 152 is meshed with the worm wheel 153, the ejection cylinder 154 is connected with the upper end of the machine base 150, a positioning hole 153-1 is eccentrically arranged on the worm wheel 153, the lower end of a piston rod of the ejection cylinder 154 is inserted into the positioning hole 153-1, and the upper end of the piston rod of the ejection cylinder 154 is connected with the mold core 155.

The following specific working modes are illustrated by specific examples:

example 1:

according to the automatic special-shaped workpiece bending device, the bending machine 1 is started, the mechanisms are enabled to reach the original point position through the numerical control system 2, a plate to be bent is placed on the table top 92, the plate to be bent is supported by the rolling balls 93 on the table top 92, and then the front gear positioning mechanism 13 and the rear gear positioning mechanism 14 are started to work.

A piston rod of a first air cylinder 136 in the front gear positioning mechanism 13 extends out to drive a first positioning baffle column 137 to rotate from a horizontal state to a vertical state, then a first servo motor 134 drives a first gear 135 to rotate along a first straight rack 131, so that a first support plate 132 and a first roller 133 on the first support plate carry the first servo motor 134, the first gear 135, the first air cylinder 136 and the first positioning baffle column 137 to move inwards along a first open kidney-shaped hole 130-1 until the first positioning baffle column 137 clamps a plate to be folded.

The piston rod of the second cylinder 146 in the rear gear positioning mechanism 14 extends out to drive the second positioning retaining column 147 to rotate from a horizontal state to a vertical state, then the second servo motor 144 drives the second gear 145 to rotate along the second spur rack 141, so that the second support plate 142 and the second roller 143 thereon drive the second servo motor 144, the second gear 145, the second cylinder 146 and the second positioning retaining column 147 to move inwards along the second open kidney-shaped hole 140-1 until the second positioning retaining column 147 clamps the plate to be folded.

And then the front feeding mechanism 11 and the rear feeding mechanism 12 are started to work.

Wherein, a front motor 114 in the front feeding mechanism 11 drives a front gear 115 to rotate clockwise, and under the constraint of the front arc-shaped rack 112 and the front arc-shaped guide rail 110, the front slider 111 and the front slide 113 drive the front stop pillar 116 to move counterclockwise until the front stop pillar 116 clamps the plate to be folded.

Wherein, the rear motor 124 in the rear feeding mechanism 12 drives the rear gear 125 to rotate counterclockwise, and the rear sliding block 121 and the rear sliding seat 123 drive the rear stop pillar 126 to move clockwise under the constraint of the rear arc-shaped rack 122 and the rear arc-shaped guide rail 120 until the rear stop pillar 126 clamps the plate to be folded.

A first positioning baffle column 137, a second positioning baffle column 147, two front baffle columns 116 and two rear baffle columns 126 clamp the plate to be folded to perform first bending line positioning, namely, the upper die 5 is just opposite to the bending line a on the plate to be folded.

Then, the right oil cylinder 7 and the left oil cylinder 8 are driven to work through the automatic control valve group 3 of the numerical control system 2, the right oil cylinder 7 and the left oil cylinder 8 push the upper sliding block at the end part of the piston rod to move downwards, the upper die 5 moves downwards along with the upper sliding block to start pressing a plate to be folded, a bending workpiece with a first fold is formed, and then the upper die 5 moves upwards along with the upper sliding block.

And then the mold core positioning mechanism 15 is started to work, a piston rod of the ejection air cylinder 154 in the mold core positioning mechanism 15 extends out, the mold core 155 is ejected out to be inserted into a crack preventing groove of the bending workpiece with the first crease, the bending workpiece with the first crease is ejected up, and the bending line of the bending workpiece with the first crease can be more accurately aligned to the upper mold 5.

And then the front feeding mechanism 11 and the rear feeding mechanism 12 are started again to work.

Wherein, a front motor 114 in the front feeding mechanism 11 drives a front gear 115 to rotate clockwise for an angle, under the constraint of the front arc-shaped rack 112 and the front arc-shaped guide rail 110, the front slider 111 and the front sliding seat 113 drive a front stop column 116 to move counterclockwise for an arc length, and the front stop column 116 pushes a bending workpiece forming a first crease to rotate counterclockwise; meanwhile, a rear motor 124 in the rear feeding mechanism 12 drives a rear gear 125 to rotate clockwise by an angle, and a rear sliding block 121 and a rear sliding seat 123 drive a rear stop column 126 to move counterclockwise by an arc length under the constraint of a rear arc-shaped rack 122 and a rear arc-shaped guide rail 120; meanwhile, a servo motor III 151 in the mold core positioning mechanism 15 drives a worm wheel 153 through a worm 152 to drive a mold core 155 inserted into a positioning hole 153-1 to move; under the cooperative action of the front motor 114, the rear motor 124 and the third servo motor 151, the upper die 5 is opposite to the bending line b on the plate to be bent.

And then the mold core positioning mechanism 15 is started to work, the piston rod of the ejection cylinder 154 in the mold core positioning mechanism 15 contracts, the mold core 155 contracts, and the bending workpiece with the first crease is dropped onto the lower mold 6, namely the upper mold 5 is just opposite to the bending line b on the bending workpiece with the first crease.

Then, the numerical control system 2 automatically controls the valve group 3 again to drive the right oil cylinder 7 and the left oil cylinder 8 to work, the right oil cylinder 7 and the left oil cylinder 8 push the upper sliding block at the end part of the piston rod to move downwards, the upper die 5 moves downwards along with the upper sliding block, a bending workpiece with a first crease is pressed to form a bending workpiece with a second crease, and then the upper die 5 moves upwards along with the upper sliding block. And repeating the process, and sequentially bending the c bending line, the d bending line, the e bending line and the f bending line.

And then reversing, sequentially stepping and clockwise moving the two rear stop posts 126 by an arc length, sequentially stepping and clockwise moving the two front stop posts 116 by an arc length, and sequentially bending g, h, i, j, k, l and m bending lines under the cooperative action of the front motor 114, the rear motor 124 and the three servo motors 151 until the bending work is finished.

According to the automatic special-shaped workpiece bending device, the front feeding mechanism 11 and the rear feeding mechanism 12 of the fan-ring structure are respectively arranged in front of and behind the workbench 4, a plate to be bent is clamped and positioned through the front stop positioning mechanism 13 and the rear stop positioning mechanism 14, then the bending lines of the plate to be bent are sequentially aligned to the bending central line of the bending machine 1 through the cooperative action of the front feeding mechanism 11, the rear feeding mechanism 12 and the mold core positioning mechanism 15, and the automatic positioning bending work is completed according to the sequence of a, b, c, d, e, f, g, h, i, j, k, l and m, so that the automatic bending device is high in automation degree and bending efficiency and precision.

According to the automatic special-shaped workpiece bending device, the arc rotation of a plate to be bent of a special-shaped workpiece on the workbench 4 is realized through the cooperative action of the front feeding mechanism 11, the rear feeding mechanism 12 and the mold core positioning mechanism 15.

Example 2:

on the basis of embodiment 1, right hydro-cylinder 7 designs and is less than left hydro-cylinder 8, because lower mould 6 the die orifice on the left is less, the die orifice on the right is great, and the bending force on the left is far greater than the bending force on the right, so the pressure that right hydro-cylinder 7 designed is less than the pressure of left hydro-cylinder 8, makes things convenient for the shaping of the panel of waiting to roll over on the left. The problem of special-shaped workpiece wait to roll over crease on the panel all be the hypotenuse shape, require the stress point inhomogeneous of bending is solved, guaranteed that special-shaped workpiece can't bend the shaping and target in place.

Example 3:

on the basis of embodiment 1, a piston rod of a first air cylinder 136 in the front gear positioning mechanism 13 extends to drive a first positioning pin 137 to rotate from a horizontal state to a vertical state, then a first servo motor 134 drives a first gear 135 to rotate along a first straight rack 131, so that a first support plate 132 and a first roller 133 on the first support plate carry the first servo motor 134, the first gear 135, the first air cylinder 136 and the first positioning pin 137 to move inwards along a first open kidney-shaped hole 130-1 until the first positioning pin 137 clamps a plate to be folded.

And a piston rod of a second air cylinder 146 in the rear gear positioning mechanism 14 extends out to drive a second positioning retaining column 147 to rotate from a horizontal state to a vertical state, then the second servo motor 144 drives the second gear 145 to rotate along a second straight rack 141, so that the second support plate 142 and the second roller 143 thereon drive the second servo motor 144, the second gear 145, the second air cylinder 146 and the second positioning retaining column 147 to move inwards along a second open kidney-shaped hole 140-1 until the second positioning retaining column 147 clamps the plate to be folded.

The front gear positioning mechanism 13 and the rear gear positioning mechanism 14 can be suitable for positioning dimensional errors caused by tilting of plates to be folded and workpieces after being folded in various specifications and sizes.

Example 4:

the upper die 5 is formed by combining a plurality of independent upper dies, and the lower die 6 is formed by combining a plurality of independent lower dies, so that the opening of the lower die 6 is selected according to the standard, the bending lap is in place, and the three-point stress bending can be realized.

The present invention has been described in connection with the accompanying drawings, and it is to be understood that the invention is not limited to the specific embodiments described above, but is intended to cover various insubstantial modifications of the invention based on the principles and technical solutions of the invention; the present invention is not limited to the above embodiments, and can be modified in various ways.