Workpiece positioning assembly of hot bending machine

Abstract

The utility model provides a workpiece positioning assembly of a hot bending machine, which comprises a positioning base plate, a sliding device arranged at the bottom of the positioning base plate along the length direction, a first sliding seat and a second sliding seat arranged on the sliding device, and a driving device arranged on a supporting plate and used for driving the first sliding seat and the second sliding seat to be close to or away from each other simultaneously, the two ends, in the width direction of the positioning base plate, of the first sliding base and the two ends, in the width direction of the positioning base plate, of the second sliding base are each provided with a pin shaft perpendicular to the supporting plate, a positioning clamping block is rotationally arranged on each pin shaft, and each positioning clamping block is provided with a first positioning claw extending in the length direction of the supporting plate from the rotating center of the corresponding pin shaft and a second positioning claw extending in the width direction of the supporting plate. And reset devices are arranged between the positioning clamping block and the first sliding seat and between the positioning clamping block and the second sliding seat. According to the structure, the driving device can drive the first sliding seat and the second sliding seat to be close to or away from each other along the sliding device at the same time, the workpiece cannot be rubbed with the positioning clamping block in the process of being taken away, and the workpiece positioning precision can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of hot bending machine technology, and specifically to a workpiece positioning component for a hot bending machine. Background Technology

[0002] Workpieces need to be transferred during the processing. To improve processing efficiency, fully automatic hot bending machines are usually used when processing workpieces. Fully automatic hot bending machines include automatic loading and unloading equipment. The fully automatic loading and unloading equipment usually uses a robot to transfer the workpiece. Since the position of the mold to be placed on the workpiece is fixed, the robot needs to place the workpiece on the mold with high precision. Otherwise, the workpiece will be crushed when the mold is closed. Therefore, the workpiece needs to be accurately positioned before the robot picks up the workpiece.

[0003] The applicant disclosed an automatic loading and unloading device for a hot bending machine in the patent document with authorization announcement number CN218370508U. The device discloses a secondary positioning component, which positions the workpiece by means of two fixed edges and two movable edges. After positioning is completed, the two movable edges are retracted. At this time, the workpiece is in contact with the two fixed edges. When the robot arm picks up the workpiece, the edge of the workpiece will rub against the fixed edges, which may affect the positioning accuracy of the workpiece. In addition, after the movable edges are retracted, the workpiece is in a free state. The vibration generated by the robot arm or the machine operation may cause the workpiece to shift, resulting in a decrease in positioning accuracy.

[0004] Therefore, it is necessary to design a new positioning component to avoid the above problems and improve positioning accuracy. Summary of the Invention

[0005] The present invention aims to solve the technical problem of low workpiece positioning accuracy in the existing workpiece positioning devices.

[0006] To solve the above-mentioned technical problems, this utility model provides a workpiece positioning component for a hot bending machine, including a positioning base plate, a support plate at each end of the bottom of the positioning base plate along the length direction, a sliding device at the bottom of the positioning base plate along the length direction, a first slide and a second slide on the sliding device, a driving device on the support plate for driving the first slide and the second slide to approach or move away simultaneously, a pin perpendicular to the support plate at each end of the first slide and the second slide along the width direction of the positioning base plate, a positioning block rotatably provided on the pin, the positioning block having a first positioning claw extending from the rotation center of the pin along the length direction of the support plate and a second positioning claw extending along the width direction of the support plate, and a reset device between the positioning block and the first slide and between the positioning block and the second slide.

[0007] The above structure, by setting up a driving device and a sliding device, allows the driving device to drive the first slide and the second slide to simultaneously approach or move away from each other along the sliding device. The first positioning claw and the second positioning claw position the workpiece from four sides. After positioning, the reset device applies a clamping force to the workpiece through the positioning block to prevent the workpiece from shifting due to machine vibration. After the robot arm picks up the workpiece, the driving device drives the positioning block away from the workpiece again. Thus, the workpiece will not rub against the positioning block during the removal process. Through the above settings, the positioning accuracy of the workpiece can be effectively improved. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0009] Figure 2 This is a schematic diagram of the structure of this utility model without a workpiece placed in it;

[0010] Figure 3 This is a structural schematic diagram from another perspective of an embodiment of the present utility model;

[0011] Figure 4 This is a schematic diagram of the workpiece positioning process in an embodiment of this utility model. Detailed Implementation

[0012] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0013] like Figures 1 to 4 As shown, a workpiece positioning component for a hot bending machine includes a positioning base plate 100. In this embodiment, the positioning base plate 100 is a rectangular plate.

[0014] A support plate 101 is provided at each end of the bottom of the positioning base plate 100 along the length direction. The support plate 101 is used to support the positioning base plate 100 and to install components. A tie rod 102 for reinforcement is also provided between the two support plates 101.

[0015] like Figure 3 As shown, a sliding device is provided at the bottom of the positioning base plate 100 along the length direction, and a first slide block 13 and a second slide block 14 are provided on the sliding device.

[0016] In this embodiment, the sliding device includes two parallel slide rails 11, and a slider 12 is provided on the slide rails 11. The first slide block 13 and the second slide block 14 are both connected to the slider 12.

[0017] The support plate 101 is provided with a drive device that drives the first slide 13 and the second slide 14 to approach or move away from each other at the same time.

[0018] The driving device includes a drive motor 15 mounted on a support plate 101 and a positive and negative threaded rod 16 connected to the output shaft of the drive motor 15; a support base 17 and a fixed base 18 are provided at the intersection of the positioning base plate 100 and the two support plates 101 respectively, and the positive and negative threaded rod 16 is rotatably mounted between the support base 17 and the fixed base 18; a positive threaded nut 21 is provided on the first slide 13, and a negative threaded nut 22 is provided on the second slide 14. Both the positive threaded nut 21 and the negative threaded nut 22 cooperate with the positive and negative threaded rod 16. When the positive and negative threaded rod 16 rotates, the first slide 13 and the second slide 14 can simultaneously approach or move away from each other.

[0019] like Figure 2 As shown, pins 19 perpendicular to the support plate 101 are provided at both ends of the first slide block 13 and the second slide block 14 along the width direction of the positioning base plate 100.

[0020] In this embodiment, pin support blocks (20) 20 are provided at both ends of the first slide block 13 and the second slide block 14. The pin support blocks (20) 20 are located on the outside of the positioning base plate 100, and the pin 19 is provided on the pin support blocks (20) 20.

[0021] A positioning block 23 is rotatably provided on the pin 19, and the positioning block 23 is rotatably provided on the pin 19 via a bearing.

[0022] The positioning block 23 has a first positioning claw 231 extending from the rotation center of the pin 19 along the length direction of the support plate 101 and a second positioning claw 232 extending along the width direction of the support plate 101.

[0023] In this embodiment, the second positioning claw 232 is perpendicular to the first positioning claw 231, which can reduce the processing cost. Of course, the included angle between the first positioning claw 231 and the second positioning claw 232 can be an acute angle or an obtuse angle. Both the first positioning claw 231 and the end of the first positioning claw 231 away from the pin 19 are provided with a clearance groove 230 for avoiding the workpiece.

[0024] A positioning wheel 24 is rotatably provided at the end of the first positioning claw 231. In this embodiment, the positioning wheel 24 is a polyurethane bearing. The positioning wheel 24 is located in the clearance groove 230, and the outer circumference of the positioning wheel 24 extends beyond the first positioning claw 231. Since polyurethane has a certain elasticity, the use of polyurethane bearings can effectively prevent damage to the workpiece.

[0025] Both the first slide block 13 and the second slide block 14 are provided with a block limiting plate 25 for limiting the position of the positioning block 23.

[0026] A reset device is provided between the positioning block 23 and the first slide 13, and between the positioning block 23 and the second slide 14.

[0027] In this embodiment, the reset device is a spring 26, one end of which is connected to the locking block limiting plate 25; a bolt is provided on the first positioning claw 231, and the other end of the spring 26 is connected to the bolt on the first positioning claw 231.

[0028] After intersecting holes are made on two adjacent surfaces of the locking plate 25, a hanging post for hanging the spring 26 is formed.

[0029] The upper surface of the positioning base plate 100 is provided with three or more round-headed support columns 27 for supporting the workpiece and one or more sensors 28 for detecting the workpiece.

[0030] The round-headed support column 27 uses a round-headed nut made of nylon material, which cooperates with the bolt that passes through the bottom of the positioning base plate 100. The round-headed support column 27 can reduce the contact area with the workpiece and improve the positioning accuracy.

[0031] Figure 4 This is a schematic diagram illustrating the workpiece positioning achieved by the present invention. The drive motor 15 drives the forward and reverse threaded rods 16 to rotate, causing the first slide block 13 and the second slide block 14 to simultaneously approach. The workpiece 1 is held by four first positioning claws 231 and four second positioning claws 232 via positioning wheels 24. After positioning is complete, the robot can grasp or absorb the workpiece 1 at this time. Alternatively, the drive motor 15 can drive the forward and reverse threaded rods 16 to rotate in the opposite direction, causing the first slide block 13 and the second slide block 14 to simultaneously move away. After the positioning wheels 24 on the four first positioning claws 231 leave the workpiece 1 under the action of the spring 26, the four second positioning claws 231... While the positioning wheels 24 on the gripper 232 are still holding the workpiece 1, the robot can grab or absorb the workpiece 1 again. If the vibration generated by the machine operation is not enough to cause the workpiece 1 to move, the robot can also grab or absorb the workpiece 1 again after all the positioning wheels 24 on the four first positioning claws 231 and the four second positioning claws 232 have left the workpiece 1. In the first two methods, after the robot grabs or absorbs the workpiece 1, the drive motor 15 continues to run, so that the positioning wheels 24 completely break contact with the workpiece 1. In this way, when the robot takes away the workpiece, the workpiece 1 will not rub against other parts and cause displacement, which can effectively improve the positioning accuracy of the workpiece.

Claims

1. A workpiece positioning assembly for a hot bending machine, comprising a positioning base plate (100), wherein a support plate (101) is provided at each end of the bottom of the positioning base plate (100) along the length direction, characterized in that: A sliding device is provided at the bottom of the positioning base plate (100) along the length direction. A first slide (13) and a second slide (14) are provided on the sliding device. A driving device is provided on the support plate (101) to drive the first slide (13) and the second slide (14) to approach or move away from each other at the same time. A pin (19) perpendicular to the support plate (101) is provided at both ends of the first slide (13) and the second slide (14) along the width direction of the positioning base plate (100). A positioning block (23) is rotatably provided on the pin (19). The positioning block (23) has a first positioning claw (231) extending from the rotation center of the pin (19) along the length direction of the support plate (101) and a second positioning claw (232) extending along the width direction of the support plate (101). A reset device is provided between the positioning block (23) and the first slide (13), and between the positioning block (23) and the second slide (14).

2. The workpiece positioning assembly of the hot bending machine according to claim 1, characterized in that: The sliding device includes two or more slide rails (11), and a slider (12) is provided on the slide rails (11). The first slide block (13) and the second slide block (14) are both connected to the slider (12).

3. The workpiece positioning assembly of the hot bending machine according to claim 2, characterized in that: The driving device includes a drive motor (15) mounted on a support plate (101) and a positive and negative threaded rod (16) connected to the output shaft of the drive motor (15); a support seat (17) and a fixed seat (18) are provided at the intersection of the positioning base plate (100) and the two support plates (101), respectively, and the positive and negative threaded rod (16) is rotatably mounted between the support seat (17) and the fixed seat (18); a positive threaded nut (21) is provided on the first slide (13), and a negative threaded nut (22) is provided on the second slide (14). Both the positive threaded nut (21) and the negative threaded nut (22) are engaged with the positive and negative threaded rod (16). When the positive and negative threaded rod (16) rotates, the first slide (13) and the second slide (14) can simultaneously approach or move away from each other.

4. The workpiece positioning assembly of the hot bending machine according to claim 1, characterized in that: Pin support blocks (20) are provided at both ends of the first slide (13) and the second slide (14). The pin support blocks (20) are located on the outside of the positioning base plate (100), and the pin (19) is provided on the pin support blocks (20).

5. The workpiece positioning assembly of the hot bending machine according to claim 1, characterized in that: The positioning block (23) is rotatably mounted on the pin (19) via a bearing, and the second positioning claw (232) is perpendicular to the first positioning claw (231).

6. The workpiece positioning assembly of the hot bending machine according to claim 1, characterized in that: Both the first positioning claw (231) and the first positioning claw (231) are provided with a clearance groove (230) for avoiding the workpiece at the end away from the pin (19); and a positioning wheel (24) is rotatably provided at the end of the first positioning claw (231) and the first positioning claw (231).

7. The workpiece positioning assembly of the hot bending machine according to claim 1, characterized in that: Both the first slide (13) and the second slide (14) are provided with locking blocks (25) for limiting the position.

8. The workpiece positioning assembly of the hot bending machine according to claim 7, characterized in that: The reset device is a spring (26), one end of which is connected to the locking block limiting plate (25), and the other end of which is connected to the first positioning claw (231).

9. The workpiece positioning assembly of the hot bending machine according to claim 1, characterized in that: The upper surface of the positioning base plate (100) is provided with three or more round-headed support columns (27) for supporting the workpiece and one or more sensors (28) for detecting the workpiece.

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