阅读说明：本技术 无级控速式片材精密立体成型设备及加工工艺 (Stepless speed control type sheet precise three-dimensional forming equipment and processing technology ) 是由 王勇 盛伟军 余永辉 于 2020-05-07 设计创作，主要内容包括：本发明涉及拉伸模具技术领域,尤其涉及无级控速式片材精密立体成型设备及加工工艺,其包括架体、控制器、还包括拉伸模具,拉伸模具包括上固定板、下固定板,还包括模头安装板、公模头、一级母模头、二级母模头,一级母模头、二级母模头之间设置有弹簧；一级母模头设置有与公模头配合的一级母模孔,二级母模头设置有与公模头配合的二级母模孔,还包括拉伸动力装置,拉伸动力装置包括伺服电机和传动组件,伺服电机通过传动组件与模头安装板传动连接,控制器与伺服电机电信号连接。本发明的无级控速式片材精密立体成型设备及加工工艺,可分两次拉伸成型；易于控制公模头的下压速度,可实现变速拉伸加工,可提高拉伸质量。(The invention relates to the technical field of drawing dies, in particular to stepless speed control type sheet precise three-dimensional forming equipment and a processing technology, wherein the equipment comprises a frame body, a controller and a drawing die, the drawing die comprises an upper fixing plate, a lower fixing plate, a die head mounting plate, a male die head, a primary female die head and a secondary female die head, and a spring is arranged between the primary female die head and the secondary female die head; the one-level female die head is provided with the one-level female die hole matched with the male die head, the second-level female die head is provided with the second-level female die hole matched with the male die head, the drawing device further comprises a drawing power device, the drawing power device comprises a servo motor and a transmission assembly, the servo motor is in transmission connection with the die head mounting plate through the transmission assembly, and the controller is in electric signal connection with the servo motor. The stepless speed control type sheet precise three-dimensional forming equipment and the processing technology can be used for twice stretching forming; the pressing speed of the male die head is easy to control, variable speed drawing processing can be realized, and the drawing quality can be improved.)

1. Stepless speed control type sheet precise three-dimensional forming equipment comprises a frame body and a controller, and is characterized in that: the drawing die comprises an upper fixing plate, a lower fixing plate, a die head mounting plate, a male die head, a primary female die head and a secondary female die head, wherein the upper fixing plate and the lower fixing plate are connected through a guide pillar; a spring is arranged between the primary female die head and the secondary female die head; the first-stage female die head is provided with a first-stage female die hole matched with the male die head, and the second-stage female die head is provided with a second-stage female die hole matched with the male die head;

the die head drawing device is characterized by further comprising a drawing power device for driving the die head mounting plate to reciprocate in the vertical direction, the drawing power device comprises a servo motor and a transmission assembly, the servo motor is in transmission connection with the die head mounting plate through the transmission assembly, and the controller is in electrical signal connection with the servo motor.

2. The stepless speed control type sheet precise three-dimensional forming equipment according to claim 1, is characterized in that: the spring is sleeved on the guide post.

3. The stepless speed control type sheet precise three-dimensional forming equipment according to claim 1, is characterized in that: the guide posts are eight, eight guide posts are evenly distributed on four sides of the upper fixing plate, and three guide posts are arranged on each side of the upper fixing plate.

4. The stepless speed control type sheet precise three-dimensional forming equipment according to claim 1, is characterized in that: the heating device further comprises a heater, and the heater is arranged on the upper fixing plate or the lower fixing plate.

5. The stepless speed control type sheet precise three-dimensional forming equipment according to claim 4, is characterized in that: the heat insulation plate is characterized by further comprising two heat insulation plates, wherein the two heat insulation plates are respectively arranged on the upper surface of the upper fixing plate and the lower surface of the lower fixing plate.

6. The stepless speed control type sheet precise three-dimensional forming equipment according to claim 1, is characterized in that: the transmission assembly comprises a transmission mechanism, a self-rotation nut and a transmission screw rod, one end of the transmission screw rod is fixedly connected with the die head mounting plate, the other end of the transmission screw rod is in threaded transmission connection with the self-rotation nut, and the self-rotation nut is pivoted on the frame body; the servo motor is rotationally connected with the self-rotation nut through a transmission mechanism.

7. The stepless speed control type sheet precise three-dimensional forming equipment according to any one of claims 1-6, is characterized in that: the primary female die hole is larger than the secondary female die hole.

8. The stepless speed-control type sheet precise three-dimensional forming processing technology is characterized in that: the stepless speed control type sheet precise three-dimensional forming equipment comprises the following steps:

A. starting a heater to heat the male die head, the primary female die head and the secondary female die head to 55-76% of the plasticizing temperature of the workpiece, and keeping the temperature for 10-15 s;

B. starting a servo motor, driving an upper fixing plate to drive a male die head to move downwards, and controlling the relation among the moving speed a millimeter/second of the male die head, the thickness b millimeter of a workpiece, the stretching depth c millimeter and the temperature d DEG C of the male die head to meet the following requirements before the male die head enters a secondary female die hole: a ═ b × d/c;

C. after the male die head enters the secondary female die hole, the relation among the speed a mm/s of downward movement of the male die head, the thickness b mm of the workpiece, the drawing depth c mm and the temperature d ℃ of the male die head is controlled to meet the following requirements: a ═ b × d/c²。

Technical Field

The invention relates to the technical field of mould pressing three-dimensional forming, in particular to stepless speed control type sheet precise three-dimensional forming equipment and a processing technology.

Background

The drawing die is used for pressing a plane sheet into a three-dimensional shape, the existing drawing equipment generally drives a male die head to press the sheet to be drawn and formed through a hydraulic power system, the hydraulic power system is inconvenient to adjust the pressing speed, drawing is often completed at one time, deformation and size deviation are easy to generate, and the drawing die is not suitable for drawing products with high machining precision.

Disclosure of Invention

The invention aims to provide stepless speed control type sheet precise three-dimensional forming equipment and a processing technology aiming at the defects of the prior art so as to solve the problems.

In order to achieve the purpose, the stepless speed control type precise three-dimensional sheet forming equipment comprises a frame body, a controller and a drawing die, wherein the drawing die comprises an upper fixing plate and a lower fixing plate, and further comprises a die head mounting plate, a male die head, a primary female die head and a secondary female die head, the upper fixing plate and the lower fixing plate are connected through a guide pillar, the male die head is mounted on the die head mounting plate, the die head mounting plate is slidably arranged on the guide pillar and arranged below the upper fixing plate, the secondary female die head is mounted on the lower fixing plate, and the primary female die head is slidably arranged on the guide pillar and arranged between the male die head and the secondary female; a spring is arranged between the primary female die head and the secondary female die head; the first-stage female die head is provided with a first-stage female die hole matched with the male die head, and the second-stage female die head is provided with a second-stage female die hole matched with the male die head;

the die head drawing device is characterized by further comprising a drawing power device for driving the die head mounting plate to reciprocate in the vertical direction, the drawing power device comprises a servo motor and a transmission assembly, the servo motor is in transmission connection with the die head mounting plate through the transmission assembly, and the controller is in electrical signal connection with the servo motor.

Furthermore, the spring is sleeved on the guide post.

Furthermore, the guide posts are eight, eight guide posts are evenly distributed on four sides of the upper fixing plate, and three guide posts are arranged on each side of the upper fixing plate.

Further, the heating device also comprises a heater which is arranged on the upper fixing plate or the lower fixing plate.

Furthermore, the heat insulation plate comprises two heat insulation plates which are respectively arranged on the upper surface of the upper fixing plate and the lower surface of the lower fixing plate.

Furthermore, the transmission assembly comprises a transmission mechanism, a self-rotation nut and a transmission screw rod, one end of the transmission screw rod is fixedly connected with the die head mounting plate, the other end of the transmission screw rod is in threaded transmission connection with the self-rotation nut, and the self-rotation nut is pivoted on the frame body; the servo motor is rotationally connected with the self-rotation nut through a transmission mechanism.

Furthermore, the primary female die hole is larger than the secondary female die hole.

In order to achieve the above object, the present invention provides a process for precision three-dimensional forming of stepless speed control type sheet, which uses the present invention, and comprises the following steps:

A. starting a heater to heat the male die head, the primary female die head and the secondary female die head to 55-76% of the plasticizing temperature of the workpiece, and keeping the temperature for 10-15 s;

B. starting a servo motor, driving an upper fixing plate to drive a male die head to move downwards, and controlling the relation among the moving speed a millimeter/second of the male die head, the thickness b millimeter of a workpiece, the stretching depth c millimeter and the temperature d DEG C of the male die head to meet the following requirements before the male die head enters a secondary female die hole: a ═ b × d/c;

C. after the male die head enters the secondary female die hole, the relation among the speed a mm/s of downward movement of the male die head, the thickness b mm of the workpiece, the drawing depth c mm and the temperature d ℃ of the male die head is controlled to meet the following requirements: a ═ b × d/c²。

The invention has the beneficial effects that: the stepless speed control type precise three-dimensional sheet forming equipment and the processing technology can form materials by two times, avoid or reduce the phenomenon of sheet deformation caused by over-depth of one-time forming die pressing, and the controller controls the servo motor to drive the die head mounting plate to move up and down in a reciprocating manner, thereby realizing stepless speed regulation, variable speed drawing processing and convenient control of drawing quality.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a front view of the drawing die of the present invention.

Fig. 3 is a schematic perspective view of the drawing die of the present invention.

The reference numerals include:

0-frame body

11-upper fixing plate 12-lower fixing plate 2-heat insulation plate

3-die head mounting plate 4-male die head

5-first-stage female die head 51-first-stage female die hole

6-second-stage female die head 61-second-stage female die hole 7-spring

8-stretching power device 81-servo motor 82-transmission mechanism

83-rotation nut 84-drive screw.

Detailed Description

The present invention is described in detail below with reference to the attached drawings.

As shown in fig. 1 to 3, the material precision three-dimensional forming stepless speed control device comprises a frame body 0, a controller, a drawing die, an upper fixing plate 11, a lower fixing plate 12, a die head mounting plate 3, a male die head 4, a primary female die head 5 and a secondary female die head 6, wherein the upper fixing plate 11 and the lower fixing plate 12 are connected through a guide pillar, the male die head 4 is mounted on the die head mounting plate 3, the die head mounting plate 3 is slidably arranged on the guide pillar and arranged below the upper fixing plate 11, the secondary female die head 6 is mounted on the lower fixing plate 12, and the primary female die head 5 is slidably arranged on the guide pillar and arranged between the male die head 4 and the secondary female die head 6; a spring 7 is arranged between the primary female die head 5 and the secondary female die head 6; the primary female die head 5 is provided with a primary female die hole 51 matched with the male die head 4, and the secondary female die head 6 is provided with a secondary female die hole 61 matched with the male die head 4; still include the tensile power device of drive die head mounting panel 3 at vertical direction reciprocating motion, tensile power device includes servo motor 81 and drive assembly, and servo motor 81 is connected with the transmission of die head mounting panel 3 through drive assembly, and the controller is connected with servo motor 81 electricity signal. The stepless speed control type sheet precise three-dimensional forming equipment is used for moulding sheets, the sheets are placed between a male die head 4 and a primary female die head 5, the male die head 4 is pressed downwards to press the sheets to a primary female die hole 51 of the primary female die head 5 for primary forming, the male die head 4 is continuously pressed downwards to push the primary female die head 5 to move downwards to compress a spring 7, so that the primary female die head 5 is continuously moved downwards, and the male die head 4 presses the sheets to a secondary female die hole 61 for secondary forming. The controller controls the servo motor 81 to drive the die head mounting plate 3 to reciprocate up and down, thereby realizing stepless speed regulation, variable speed drawing processing and being convenient for controlling drawing quality.

Specifically, the primary cavity 51 is larger than the secondary cavity 61. The stepless speed control type precise three-dimensional sheet forming equipment can be stretched into a step shape.

According to the stepless speed control type sheet precise three-dimensional forming equipment, the spring 7 is sleeved on the guide post. The stepless speed control type sheet precise three-dimensional forming equipment has the advantage that the stability of the spring 7 is high.

According to the stepless speed control type precise three-dimensional sheet forming equipment, the number of the guide columns is eight, the eight guide columns are uniformly distributed on four sides of the upper fixing plate 11, three guide columns are arranged on each side of the upper fixing plate 11, and the stability is high.

The stepless speed control type sheet precise three-dimensional forming equipment further comprises a heater, and the heater is arranged on the upper fixing plate 11 or the lower fixing plate 12. The stepless speed control type precise three-dimensional sheet forming equipment can heat and destress materials before die pressing and stretching, and improves the deformability of the materials.

The stepless speed control type precise three-dimensional sheet forming equipment further comprises two heat insulation plates 2, wherein the two heat insulation plates 2 are respectively arranged on the upper surface of the upper fixing plate 11 and the lower surface of the lower fixing plate 12. The stepless speed control type sheet precise three-dimensional forming equipment reduces the outward transfer of heat.

Specifically, the transmission assembly comprises a transmission mechanism 82, a rotation nut 83 and a transmission screw 84, one end of the transmission screw 84 is fixedly connected with the die head mounting plate 3, the other end of the transmission screw 84 is in threaded transmission connection with the rotation nut 83, and the rotation nut 83 is pivoted on the frame body 0; the servo motor 81 is rotatably connected to a rotation nut 83 via a transmission mechanism 82.

The invention relates to a stepless speed control type sheet precise three-dimensional forming processing technology, which uses the stepless speed control type sheet precise three-dimensional forming equipment and comprises the following steps:

A. starting a heater to heat the male die head 4, the primary female die head 5 and the secondary female die head 6 to 55-76% of the plasticizing temperature of the workpiece, and keeping the temperature for 10-15 s;

B. the servo motor 81 is started, the upper fixing plate 11 is driven to drive the male die head 4 to move downwards, and before the male die head 4 enters the secondary female die hole 61, the relation among the downward movement speed a millimeter/second of the male die head 4, the thickness b millimeter of a workpiece, the stretching depth c millimeter and the temperature d DEG C of the male die head is controlled to meet the following requirements: a ═ b × d/c;

C. after the male die head 4 enters the secondary female die hole 61, the relationship among the speed a mm/s of downward movement of the male die head 4, the thickness b mm of the workpiece, the drawing depth c mm and the temperature d ℃ of the male die head is controlled to satisfy: a ═ b × d/c². The stepless speed control type precise three-dimensional sheet forming equipment can stretch and form materials twice, and avoids or reduces the phenomenon of sheet deformation caused by over-depth of one-step forming die pressing. The controller controls the servo motor 81 to drive the die head mounting plate 3 to reciprocate up and down, stepless speed regulation can be realized, variable-speed stretching processing can be realized, the stretching quality is convenient to control, and deformation and size deviation are not easy to generate.

In conclusion, the present invention has the above-mentioned excellent characteristics, so that it can be used to enhance the performance of the prior art and has practicability, and becomes a product with practical value.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.