阅读说明：本技术 一种自冲铆接机步进式板料夹持定位装置 (Stepping type plate clamping and positioning device of self-punching riveting machine ) 是由 黄志超 张永超 张玉宽 骆强 李玲玲 于 2020-06-28 设计创作，主要内容包括：本发明公开了一种自冲铆接机步进式板料夹持定位装置,铆接平台中心位置上设有与自冲铆接机连接的通孔,其特征在于,定位夹持平台安装在铆接平台上,铆接平台上滑动连接的两块夹持板及定位夹持平台至少通过一根双向丝杠连接,两块夹持板与两个不同方向的丝杠部连接,双向丝杠的一端或中部与带感应装置的步进式螺旋机构连接,两块夹持板之间相对双向丝杠轴向形成待接板料宽度方向定位空间；进料方向与双向丝杠轴向垂直,两块夹持板内的定位夹持平台面与铆接平台面之间在进料方向上形成待接板料长度方向定位空间,一待接板料通过铆接平台上的移动定位块定位,另一待接板料通过步进式送板机构进入铆接平台并由其控制两块待接板料的搭接长度。(The invention discloses a stepping type plate clamping and positioning device of a self-piercing riveting machine, wherein a through hole connected with the self-piercing riveting machine is arranged at the center of a riveting platform; the feeding direction is axially vertical to the bidirectional screw rod, a positioning space in the length direction of the plate to be connected is formed between the positioning clamping platform surface and the riveting platform surface in the two clamping plates in the feeding direction, a plate to be connected is positioned through a movable positioning block on the riveting platform, and the other plate to be connected enters the riveting platform through the stepping plate conveying mechanism and controls the lap joint length of the two plate to be connected.)

1. A self-piercing riveter stepping type plate clamping and positioning device comprises a riveting platform, a positioning and clamping platform, clamping plates, two-way lead screws, a stepping screw mechanism (11) and a stepping plate conveying mechanism (12), wherein a through hole connected with the self-piercing riveter is formed in the center of the riveting platform;

the feeding direction of two plates to be connected is transverse and vertical to the axial direction of the bidirectional screw rod, a positioning space in the length direction of the plates to be connected is formed between the positioning clamping platform surface and the riveting platform surface in the two clamping plates in the feeding direction, a plate to be connected is positioned through a movable positioning block on the riveting platform, the other plate to be connected enters the riveting platform through a stepping plate conveying mechanism (12) and the lap joint length of the two plates to be connected is controlled by the stepping plate conveying mechanism (12).

2. The stepping type plate material clamping and positioning device of the self-piercing riveting machine according to claim 1, wherein the riveting platform comprises a bottom plate (1), the positioning and clamping platform comprises two guide rail plates (3) which are vertically and longitudinally arranged and two side plates (5) which are horizontally arranged left and right, a square frame main body is formed among the bottom plate (1), the guide rail plates (3) and the side plates (5), and the clamping plate is a clamping scale plate (7) with scales;

the upper edge of the guide rail plate (3) is provided with a guide rail, the middle part of the lower end of the guide rail plate is provided with a groove, and the two grooves and the bottom plate (1) form a transverse feeding groove for the plates to be connected; a female die hole (8) connected with a female die of a self-piercing riveting machine is formed in the center of a bottom plate (1) in the square frame body, clamping scale plates (7) are arranged on the upper guide rail and the lower guide rail, the clamping scale plates (7) are in longitudinal sliding connection with the guide rails, and the two side plates (5) are connected with the two clamping scale plates (7) through at least one bidirectional screw (6);

relative to the plane transverse center line of the female die hole (8), the clamping scale plate (7) is symmetrical left and right, the zero scale of the clamping scale plate (7) is aligned with the plane longitudinal center line of the female die hole (8), and the middle point of the bidirectional screw rod (6) is aligned with the plane transverse center line of the female die hole (8).

3. The stepping type plate clamping and positioning device of the self-piercing riveting machine according to claim 2, wherein two ends of the clamping scale plate (7) are longitudinally connected with the upper and lower guide rails in a sliding manner through sliding blocks (4).

4. The stepping type plate clamping and positioning device of the self-piercing riveting machine according to claim 2, characterized in that at least one end of the bottom plate (1) is longitudinally provided with a sliding groove, the bottom of the clamping scale plate (7) is provided with a convex block, the convex block is in sliding connection or abdicating connection with the sliding groove, and the bottoms of the two side plates (5) and the convex block of the two clamping scale plates (7) are connected through a bidirectional screw (6).

5. The stepping type plate material clamping and positioning device of the self-punching riveting machine according to claim 1, wherein the riveting platform comprises a positioning seat (21), the positioning and clamping platform comprises a fixing bracket (23), and the clamping plate is a second clamping scale plate (22) with scales;

the positioning seat (21) is of a concave groove structure, a concave die hole connected with a female die of the self-piercing riveting machine is formed in the center of a groove bottom plate, two second clamping scale plates (22) are arranged on the groove bottom plate of the positioning seat (21) and form longitudinal sliding connection, the fixing support (23) is installed on the positioning seat (21), and the two second clamping scale plates (22) and the fixing support (23) are connected through at least one second bidirectional lead screw (28), wherein the two second clamping scale plates (22) are respectively connected with two lead screw parts in different directions in the second bidirectional lead screw (28);

relative to the plane transverse center line of the female die hole, the second clamping scale plate (22) is bilaterally symmetrical, the zero scale of the second clamping scale plate (22) is aligned with the plane longitudinal center line of the female die hole, the middle point of the second bidirectional lead screw (28) is aligned with the plane transverse center line of the female die hole, and the middle part of the second bidirectional lead screw (28) is a lead screw or a polished rod.

6. The stepping type plate clamping and positioning device of the self-piercing riveting machine as claimed in claim 5, wherein two ends of the second clamping scale plate (22) are respectively connected with two ends of the bottom plate of the positioning base (21) in a longitudinal sliding manner through the guide rail sliding blocks (24).

7. The stepping type plate material clamping and positioning device of the self-piercing riveting machine is characterized in that the lower end of the guide rail sliding block (24) is provided with a groove, and a groove bottom plate is embedded into the groove to form a sliding groove connecting structure.

8. The stepping type plate clamping and positioning device of the self-piercing riveting machine is characterized in that machining scale marks are arranged on opposite surfaces of two second clamping scale plates (22), scale values are correspondingly marked on the upper end surfaces of the second clamping scale plates (22), nuts (25) are respectively arranged in the two second clamping scale plates (22), the nuts (25) are connected with a second bidirectional lead screw (28), and the second bidirectional lead screw (28) is connected with the nuts (25) in a rotating mode to enable the two second clamping scale plates (22) to slide in opposite directions.

9. The stepping plate clamping and positioning device of the self-piercing riveting machine as claimed in claim 5 or 8, wherein the fixing support (23) is of a herringbone structure, the end faces of the support at two sides of the herringbone structure are connected with the end faces of the side plates of the two grooves of the positioning seat (21), the middle part of the fixing support (23) is of a square plate or square frame structure, the deep groove ball bearing (26) is installed in the square plate or square frame structure, and the polished rod at the middle part of the second bidirectional screw rod (28) is in interference fit with the deep groove ball bearing (26).

10. The stepping type plate clamping and positioning device of the self-piercing riveting machine according to claim 1, wherein before feeding, the induction device sends out induction signals to control the stepping type screw mechanism (11) to reversely rotate the bidirectional screw rod, and the clamping plates are opened;

after an upper plate material (9) and a lower plate material (10) are positioned by a movable positioning block and fed by a stepping plate feeding mechanism (12), an induction device sends out an induction signal to control a stepping screw mechanism (11) to rotate a bidirectional screw rod in the forward direction, and clamping is carried out between clamping plates;

the induction device induces the extrusion force of the two sides of the upper plate material (9) and the lower plate material (10), and when the extrusion force reaches a certain value, the induction device sends out an induction signal to control the step-type screw mechanism (11) to stop working;

after the upper plate (9) and the lower plate (10) are riveted, the induction device sends out induction signals to control the stepping screw mechanism (11) to reversely rotate the bidirectional screw rod, and the clamping plates are opened.

Technical Field

The invention belongs to the technical field of machinery, relates to a clamping and positioning device technology, and particularly relates to a plate clamping and positioning device for a self-piercing riveting machine.

Background

The self-piercing riveting technology is a cold joining technology for joining two or more metal or composite material plates. Because the plating layer of the plate is not damaged in the connection process, the connector has the characteristics of reliable performance, low cost, no noise, environmental friendliness and the like, and is widely applied in the fields of automobiles and aviation, and the like, and the technology is mature.

The conventional self-piercing riveting machine consists of a motor, a punch, a blank holder, a C-shaped frame and a female die. The during operation provides power through servo motor and directly impresses the rivet into waiting to rivet the panel, waits that riveting panel and rivet take place plastic deformation under the pressure effect of rivet, and the shaping back is full among the die to form the brand-new panel connection technique of stable connection.

When the conventional self-piercing riveting machine rivets a sheet material, a punch, a rivet and a female die are accurately positioned in the vertical direction, so that the rivet can be ensured to be vertical to the upper surface of the sheet material in the downward stroke motion stage. However, the female die at the bottom of the riveting machine is not provided with any fixing and positioning device, so that the overlapping size of the sheet material needs to be measured in advance, the mark is manually made on the center of the riveted point by using a marking pen, and then the sheet material is placed on the surface of the female die for riveting.

Based on this, in the continuous progress in the prior art, as CN201821922374.9 "a self-piercing riveting fixture device", a main clamp body is matched with a positioning clamping plate to fix a lower substrate of a test piece, a lifting stud is matched with a threaded hole of the main clamp body through threaded connection, a lifting plate is controlled to move up and down according to different plate thicknesses and glue layer thicknesses, a lifting plate boss is in sliding fit with a main clamp body boss to guide the movement of the lifting plate, a specific movement value is marked by a scale mark on the lifting plate boss, a limit baffle controls the degree of freedom of the lifting plate, the clamping plate boss and the lifting plate baffle are in interference fit to fix an upper substrate of the test piece, and self-piercing riveting equipment can perform self-piercing riveting work through a central hole.

CN201820423020.3 & lt & ltA self-piercing riveting auxiliary device & gt, the baffle plates on the upper supporting plate and the lower supporting plate can fix the positions of the upper riveting plate and the lower riveting plate, the lap joint area is determined, pre-marking treatment is not needed, and the centering precision of the self-piercing riveting joint is improved; the plate with different thicknesses can be clamped, and the application range of the plate is expanded.

CN201920798817.6 "a from punching riveting panel quick positioning clamping auxiliary device" can realize that the board of different boards is thick riveting through adjusting the lifter plate, can realize the riveting of the board of different board widths through adjusting bolt I, and closing device can realize the quick clamp, dismantles panel convenient and fast.

In conclusion, the further research and development of the positioning and clamping device of the self-piercing riveting machine can ensure that the riveting operation technology is more standard and the positioning precision is higher. The method is a problem which needs to be solved urgently by the industry and is a premise for further widening the application of the self-piercing riveting process in wider fields.

Disclosure of Invention

The invention aims to provide a clamping and positioning device for a self-piercing riveting machine.

The scheme adopted by the invention for solving the technical problem comprises the following steps:

a self-piercing riveter stepping type plate clamping and positioning device comprises a riveting platform, a positioning and clamping platform, clamping plates, two-way lead screws, a stepping type screw mechanism and a stepping type plate feeding mechanism, wherein a through hole connected with the self-piercing riveter is formed in the center of the riveting platform;

the feeding direction of two plates to be connected is transverse and vertical to the axial direction of the bidirectional screw rod, a positioning space in the length direction of the plates to be connected is formed between the positioning clamping platform surface and the riveting platform surface in the two clamping plates in the feeding direction, a plate to be connected is positioned through a movable positioning block on the riveting platform, and the other plate to be connected enters the riveting platform through the stepping plate conveying mechanism and the lap joint length of the two plates to be connected is controlled by the stepping plate conveying mechanism.

Furthermore, the riveting platform comprises a bottom plate, the positioning and clamping platform comprises two guide rail plates longitudinally arranged up and down and two side plates transversely arranged left and right, a square frame main body is formed among the bottom plate, the guide rail plates and the side plates, and the clamping plate is a clamping scale plate with scales;

the upper edge of the guide rail plate is provided with a guide rail, the middle part of the lower end of the guide rail plate is provided with a groove, and the two grooves and the bottom plate form a transverse feeding groove for receiving plate materials; a female die hole connected with a female die of a self-piercing riveting machine is formed in the center of a bottom plate in the square frame body, clamping scale plates are arranged on the upper guide rail and the lower guide rail, the clamping scale plates are longitudinally and slidably connected with the guide rails, the two side plates and the two clamping scale plates are connected through at least one bidirectional screw rod, and one end of the bidirectional screw rod is connected with the stepping screw mechanism;

relative to the plane transverse center line of the female die hole, the clamping scale plate is symmetrical left and right, the zero scale of the clamping scale plate is aligned with the plane longitudinal center line of the female die hole, and the middle point of the bidirectional screw rod is aligned with the plane transverse center line of the female die hole.

Furthermore, the two ends of the clamping scale plate are connected with the upper and lower guide rails in a longitudinal sliding mode through the sliding blocks.

Furthermore, at least one end of the bottom plate is longitudinally provided with a sliding groove, the bottom of the clamping scale plate is provided with a convex block, the convex block is connected with the sliding groove in a sliding mode or in a yielding mode, and the bottoms of the two side plates and the convex blocks of the two clamping scale plates are connected through a bidirectional screw rod.

Furthermore, the opposite surfaces of the two clamping graduated plates are provided with graduated lines, and the upper surfaces of the clamping graduated plates are provided with graduated scales or scale values.

Further, the riveting platform comprises a positioning seat, the positioning and clamping platform comprises a fixing support, and the clamping plate is a second clamping scale plate with scales;

the positioning seat is of a concave groove structure, a concave die hole connected with a concave die of the self-piercing riveting machine is formed in the center of a groove bottom plate, two second clamping scale plates are arranged on the groove bottom plate of the positioning seat and form longitudinal sliding connection, the fixing support is installed on the positioning seat, and the two second clamping scale plates and the fixing support are connected through at least one second bidirectional screw rod; the two second clamping scale plates are respectively connected with two screw parts in different directions in the second bidirectional screw;

relative to the plane transverse center line of the female die hole, the second clamping scale plate is bilaterally symmetrical, the zero scale of the second clamping scale plate is aligned with the plane longitudinal center line of the female die hole, the middle point of the second bidirectional lead screw is aligned with the plane transverse center line of the female die hole, and the middle part of the second bidirectional lead screw is a lead screw or a polished rod.

Furthermore, two ends of the second clamping scale plate are respectively connected with two ends of the groove bottom plate of the positioning seat in a longitudinal sliding mode through the guide rail sliding block.

Furthermore, the lower end of the guide rail sliding block is provided with a groove, and the groove bottom plate is embedded into the groove to form a sliding groove connecting structure.

Furthermore, the opposite face of two second centre gripping scale plates is equipped with the processing scale mark, and the up end of second centre gripping scale plate corresponds the mark and is equipped with the scale interval, and two second centre gripping scale plates embed respectively has the nut, and nut and the two-way screw rod of second are connected, and the two-way screw rod of second makes two second centre gripping scale plates form the slip of relative direction through being connected with the rotation of nut.

Furthermore, the fixing support is of a herringbone structure, the end faces of the supports on two sides of the herringbone structure are connected with the end faces of the side plates of the two grooves of the positioning seat, the middle part of the fixing support is of a square plate or square frame structure, a deep groove ball bearing is installed in the square plate or square frame structure, a polished rod in the middle part of the second bidirectional lead screw is in interference fit with the deep groove ball bearing, and the middle part of the second bidirectional lead screw is connected with the stepping screw mechanism.

Further, before feeding, the induction device sends out an induction signal to control the stepping screw mechanism to reversely rotate the bidirectional screw rod, and the clamping plates are opened;

after the upper plate and the lower plate are positioned by the movable positioning block and fed by the stepping plate feeding mechanism, the induction device sends out an induction signal to control the stepping screw mechanism to rotate the bidirectional screw rod in the forward direction, and the clamping plates are clamped;

the induction device induces the extrusion force of the two sides of the upper plate and the lower plate, and when the extrusion force reaches a certain value, the induction device sends out an induction signal to control the step-type screw mechanism to stop working;

after the riveting of the upper plate and the lower plate is completed, the induction device sends out an induction signal to control the stepping screw mechanism to reversely rotate the bidirectional screw rod, and the clamping plates are opened.

The clamping and positioning device belongs to a completely symmetrical structure, a zero scale mark on a scale plate passes through the center of a riveting platform at a perpendicular line in the width direction of the bottom surface of a material to be connected, when the material to be connected is required to be clamped, a stepping screw mechanism rotates a bidirectional screw rod to increase the distance between two clamping scale plates, when the distance between the two clamping scale plates is slightly larger than the width of the material to be connected, an upper material and a lower material to be connected are sequentially placed, the material to be connected is directly positioned through a positioning block of the riveting platform, and the other material to be connected enters the riveting platform through a stepping plate conveying mechanism and controls the lap joint length; simultaneously, the two clamping scale plates are provided with scale marks, the lap joint length of two materials to be connected is visually verified, the two-way screw rod is reversely and simultaneously rotated after the lap joint length is determined, when the two materials to be connected are to be clamped, the lap joint length is confirmed again to ensure the accuracy of the lap joint length, and then the two-way screw rod is continuously reversely rotated until the materials to be connected are completely clamped.

(1) The clamping and positioning device of the self-piercing riveting machine can conveniently control the condition that the material to be connected deviates, so that the self-piercing riveting operation technology is more standard.

(2) The invention is marked with a graduated scale, is provided with a guide rail device and a stepping type plate feeding mechanism, namely, the lapping length is automatically controlled, the transverse lapping dimension of the plate materials to be connected can be visually measured, the clamping graduated plate is matched with the stepping type screw mechanism through the motion among the guide rail, the slide block, the bidirectional screw rod, and the stepping type screw mechanism is provided with an induction device, and the accurate positioning of the plate materials to be connected with different widths can be realized.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a schematic cross-sectional view of a bottom plate structure in embodiment 1 of the present invention.

Fig. 3 is a schematic view of a use state of embodiment 1 of the present invention.

Fig. 4 is a schematic three-dimensional assembly of embodiment 2 of the present invention.

Fig. 5 is a schematic view of the positioning seat structure in embodiment 2 of the present invention.

Fig. 6 is a schematic three-view structure diagram of a second clamping scale plate in embodiment 2 of the present invention.

Fig. 7 is a schematic three-view structure diagram of a fixing bracket in embodiment 2 of the invention.

Fig. 8 is a schematic view of a second view structure of a guide rail slider in embodiment 2 of the present invention.

Detailed Description

The invention is further illustrated by the following examples in conjunction with the drawings, in which: the axial direction of the bidirectional screw rod is vertical, the axial direction of the bidirectional screw rod is vertical to the transverse direction, and the feeding direction of the plate to be connected is transverse.