A side wall movable punch driving structure

Abstract

The present application relates to a kind of side wall movable punch driving structure, including movable punch, transmission block trolley, floating type insert, floating type insert side is provided with first drive inclined guide plate, first drive inclined guide plate is provided with first inclined surface, transmission block trolley is provided with second drive inclined guide plate, second drive inclined guide plate is provided with second inclined surface, first inclined surface can be mutually docked with second inclined surface, transmission block trolley is further provided with third drive inclined guide plate, movable punch is provided with fourth drive inclined guide plate, third drive inclined guide plate is provided with third inclined surface, fourth drive inclined guide plate is provided with fourth inclined surface, third inclined surface and fourth inclined surface are mutually docked, floating type insert is connected with first elastic pressure device, when floating type insert moves downward in the process, first elastic pressure device will generate the first elastic recovery force of driving floating type insert to move upward, by setting lower floating type driving insert structure, effectively improve the die production rhythm, and each component is mechanically transmitted drive, stable and reliable.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile parts processing, in particular to a side wall movable punch driving structure. BACKGROUND

[0002] The side wall part is shaped on the side negative angle flanging surface of the top cover, and the inclined wedge flanging shaping is usually adopted to complete the flanging. In order to ensure that the mechanical hand can smoothly grab the part after the flanging is completed, the lower die needs to be designed as a movable punch. Some main machine factories usually adopt a cylinder push-pull to realize the movement of the movable punch. At the beginning, the cylinder is in the inflated state, the movable punch is in the retreat state, the mechanical hand places the part on the punch of the present process from the upper process die, the press starts to exhaust the cylinder, the cylinder pushes the movable punch to the jacking state, and the inclined wedge shaping mechanism starts the flanging shaping here. After the inclined wedge flanging shaping work is completed, the upper die starts to open, the cylinder starts to inflate, and the movable punch is pulled back to the retreat state. Then the mechanical hand enters the die to grab the part and sends it to the next die.

[0003] The structure is used more in some main machine factories. The structure has the advantages of simple and compact die structure. However, since the driving mode is a cylinder, it is greatly affected by the air source on the spot. Once the air source of the workshop is unstable or the air pressure of the air source is small, the movement of the movable punch will not be timely, which cannot meet the set production rhythm. At the same time, the cylinder is also a consumable part. Once the cylinder is damaged and fails, the movement of the die cannot be realized. Therefore, a more stable and reliable die structure is needed to ensure the stability and reliability of the movement of the movable punch. SUMMARY

[0004] Based on the above description, the present application provides a side wall movable punch driving structure. The mechanical transmission drive is adopted between the parts, the operation is stable and reliable, the die opening space is increased, the die production rhythm is effectively improved, and the production efficiency is ensured.

[0005] The technical scheme for solving the above technical problems is as follows:

[0006] A side wall movable punch driving structure, comprising: a movable punch, a transmission block trolley, a floating type insert, the floating type insert is provided with a first driving inclined guide plate on one side, the first driving inclined guide plate is provided with a first inclined surface, the transmission block trolley is provided with a second driving inclined guide plate, the second driving inclined guide plate is provided with a second inclined surface, the first inclined surface can be mutually butted with the second inclined surface, the transmission block trolley is further provided with a third driving inclined guide plate, the movable punch is provided with a fourth driving inclined guide plate, the third driving inclined guide plate is provided with a third inclined surface, the fourth driving inclined guide plate is provided with a fourth inclined surface, the third inclined surface and the fourth inclined surface are mutually butted, the floating type insert is connected with a first elastic pressing device, when the floating type insert moves downward in the process, the first elastic pressing device will generate the first elastic recovery force for driving the floating type insert to move upward.

[0007] On the basis of the above technical scheme, the application can be further improved as follows.

[0008] Further, the floating type insert is movably arranged on one side of the transmission block trolley, the floating type insert is externally provided with a mounting seat, the floating type insert is provided with guide plates on three sides, the first driving inclined guide plate is arranged on the other side of the floating type insert, side pins and assembly holes are arranged on the guide plates of the opposite two sides, the side pins pass through the assembly holes and contact the floating type insert.

[0009] Further, the floating type insert is externally provided with a structure of being narrow at the top and wide at the bottom, the floating type insert is provided with a groove on the bottom surface, the mounting seat is further provided with a through hole at the lower part, the first elastic pressing device is connected with the groove through the through hole, and the first driving inclined guide plate is arranged to be inclined downward.

[0010] Further, the transmission block trolley is provided with a first guide plate, a second guide plate, a third guide plate and a fourth guide plate on the bottom, the upper part and the two sides respectively, the second guide plate guides the upper die in the upper part, and the third guide plate and the fourth guide plate on the two sides of the transmission block trolley are further provided with pressing plates above respectively, and the pressing plates limit the movement of the transmission block trolley in the up-down direction.

[0011] Further, the second driving inclined guide plate is a trapezoidal structure, the inclined surface of the trapezoidal structure is arranged on the upper part of the vertical surface, the second driving inclined guide plate is attached to the opposite surface of the first driving inclined guide plate, and an included angle is arranged between the opposite vertical surfaces, when the floating type insert is in the first working state, the first driving inclined guide plate moves downward and pushes the second driving inclined guide plate to drive the transmission block trolley to move reversely relative to the mounting seat.

[0012] Furthermore, the movable punch is provided on the other side of the transmission block trolley. The movable punch is arranged at an angle relative to the transmission block trolley. Flat guide plates are installed on the bottom, top and sides of the movable punch, and pressure plates are also provided on the upper parts of both sides to restrict the movable punch from moving in a direction perpendicular to the pressure plates.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0014] This application improves the mold production cycle by setting the drive insert structure as a bottom-mounted floating structure, increasing the mold opening space, and providing a new mold structure. The mechanical transmission drive between the components is stable and reliable. The floating insert drive inclined guide plate adopts a 5-degree angle treatment at the drive surface, which effectively solves the on-site problem of jamming between drive inclined guide plates. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a side-mounted movable punch driving structure provided in an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the floating inserter in an embodiment of the present invention;

[0017] Figure 3 This is a frontal view of the floating inserter in an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of the transmission block trolley in an embodiment of the present invention;

[0019] Figure 5 This is a first-view structural diagram of the movable punch in an embodiment of the present invention;

[0020] Figure 6 This is a schematic diagram of the second perspective structure of the movable punch in an embodiment of the present invention;

[0021] Figure 7 This is a schematic diagram of the mating surface of the first driving inclined guide plate and the second driving inclined guide plate in an embodiment of the present invention;

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Movable punch; 2. Transmission block trolley; 3. Floating inserter; 4. Lower base plate; 11. Fourth drive inclined guide plate; 12. Third spring-loaded device; 13. Flat guide plate; 21. Second drive inclined guide plate; 22. Third drive inclined guide plate; 23. Second spring-loaded device; 24. First guide plate; 25. Second guide plate; 26. Third guide plate; 27. Pressure plate; 31. First drive inclined guide plate; 32. First spring-loaded device; 33. Mounting base; 34. Side pin; Detailed Implementation

[0024] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0026] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0027] Please see Figures 1-7 The present application provides a technical solution: a side movable punch driving structure, including: a movable punch 1, a transmission block trolley 2, and a floating insert 3;

[0028] The floating inserter 3 has a first driving inclined guide plate 31 on one side, and a first inclined surface on the first driving inclined guide plate 31. The transmission block trolley 2 has a second driving inclined guide plate 21, and a second inclined surface on the second driving inclined guide plate 21. The first inclined surface can be connected to the second inclined surface. The transmission block trolley 2 also has a third driving inclined guide plate 22. The movable punch 1 has a fourth driving inclined guide plate 11, and the third driving inclined guide plate 22 has a third inclined surface. The fourth driving inclined guide plate 11 has a fourth inclined surface, and the third inclined surface and the fourth inclined surface are connected to each other. The floating inserter 3 is connected to a first spring-loaded device 32. When... During the downward movement of the floating insert 3, the first spring-loaded device 32 generates a first elastic restoring force that drives the floating insert 3 to move upward. The transmission block trolley 2 is provided with a second spring-loaded device 23, and the movable punch 1 is provided with a third spring-loaded device 12. During the downward movement of the floating insert 3, the first inclined surface drives the second inclined surface to move parallel, and the third inclined surface pushes the fourth inclined surface to move obliquely upward. The second spring-loaded device 23 generates a second elastic restoring force that drives the transmission block trolley 2 to move horizontally, and the third spring-loaded device 12 generates a third elastic restoring force that drives the movable punch 1 to move in an inclined direction. It should be noted that the first spring-pressing device 32, the second spring-pressing device 23, and the third spring-pressing device 12 refer to devices with elastic properties. In this embodiment, the first spring-pressing device 32, the second spring-pressing device 23, and the third spring-pressing device 12 are preferably return nitrogen cylinders. When the upper driving force leaves, that is, when the mold opens, the floating insert 3 will move upward and return to its original position under the action of the first spring-pressing device 32. At the same time, the second spring-pressing device 23 will drive the transmission block trolley 2 to move in the horizontal direction, and the third spring-pressing device 12 will drive the movable punch 1 to move in the inclined direction.

[0029] The floating inserter 3 is movably mounted on one side of the transmission block trolley 2. A mounting base 33 is provided on the outside of the floating inserter 3. Guide plates are arranged around the floating inserter 3 on three sides. The first driving inclined guide plate 31 is located on the other side of the floating inserter 3. Side pins 34 and mounting holes are provided on the guide plates on opposite sides. The side pins 34 pass through the mounting holes and contact the floating inserter 3. The guide plates and the side pins 34 restrict the floating inserter 3 to move up and down along the guide plates within a certain stroke. In this embodiment, a mounting base 33 is also provided on the outside of the floating inserter 3. The movable punch 1, the transmission block trolley 2, and the mounting base 33 are all mounted on the lower base plate 4. The floating insert 3 contacts the upper mold, which provides driving force for the floating insert 3. The first spring-loaded device 32 is located at the bottom of the floating insert 3. The transmission block trolley 2 is positioned opposite to the mounting base 33. The second drive inclined guide plate 21 is located at one end of the transmission block trolley 2 opposite to the mounting base 33. The movable punch 1 is located on one side of the transmission block trolley 2. The fourth drive inclined guide plate 11 is located on one side of the movable punch 1.

[0030] Preferably, the floating insert 3 has a narrow top and wide bottom structure. This structure allows the floating insert 3 to move only within a certain range on the mounting base 33. The bottom surface of the floating insert 3 has a groove, and the lower part of the mounting base 33 has a through hole. The first spring-loaded device 32 is connected to the groove through the through hole. The first drive inclined guide plate 31 is inclined downwards and is guided and driven by the second drive inclined guide plate 21 of the transmission block trolley 2. In conventional solutions, the drive insert is set in the upper mold. When the mold is opened for part transfer, the space is too small, resulting in a low production cycle. In this embodiment, the drive insert is set in the lower mold, which is a lower floating structure. That is, the floating insert 3 is set on the mounting base 33 located on the lower base plate 4, which can better increase the transfer space when the mold is opened, thereby improving the production cycle to the optimal level.

[0031] The second driving inclined guide plate 21 has a trapezoidal structure, and the inclined surface of the trapezoidal structure is arranged on the upper part of the vertical surface. Correspondingly, the first driving inclined guide plate 31 also has a trapezoidal structure, and the vertical surface of the trapezoidal structure is arranged on the upper part of the inclined surface. Specifically, the vertical surface of the first driving inclined guide plate 31 is the first vertical surface, and the vertical surface on the second driving inclined guide plate 21 is the second vertical surface. Both the first and second vertical surfaces are slightly inclined relative to the vertical plane. However, it should be noted that the first and second vertical surfaces must always be parallel under normal working conditions. It should also be noted that the angle of inclination of the first and second vertical surfaces relative to the vertical plane in the spatial coordinate system is 4 to 6 degrees. Preferably, the first vertical surface is slightly inclined relative to the vertical plane in the spatial coordinate system. The first vertical plane and the second vertical plane have an angle of 5° relative to the vertical plane in the spatial coordinate system; and the third driving inclined guide plate 22, the fourth driving inclined guide plate 11 and the second driving inclined guide plate 21 have the same structure, which is a trapezoidal structure. In order to prevent the first driving inclined guide plate 31 and the second driving inclined guide plate 21, as well as the third driving inclined guide plate 22 and the fourth driving inclined guide plate 11 from getting stuck when the floating inserter 3 moves upward, the vertical planes of the first driving inclined guide plate 31, the second driving inclined guide plate 21, the third driving inclined guide plate 22 and the fourth driving inclined guide plate 11 are set at an angle of 5 degrees to the vertical direction, which effectively solves the problem of jamming between the driving inclined guide plates on site. When the floating inserter 3 is in the first working state, the first drive inclined guide plate 31 moves downward and pushes the second drive inclined guide plate 21 to drive the transmission block trolley 2 to move in the opposite direction relative to the mounting base 33. It should be noted that the reverse movement relative to the mounting base 33 means that the transmission block trolley 2 moves horizontally in the opposite direction relative to the mounting base 33.

[0032] In this embodiment, the bottom, top, and sides of the transmission block trolley 2 are respectively provided with a first guide plate 24, a second guide plate 25, a third guide plate 26, and a fourth guide plate. The first guide plate 24, the third guide plate 26, and the fourth guide plate guide the lower base plate 4, and the second guide plate 25 guides the upper mold. Furthermore, pressure plates 27 are respectively provided above the third guide plate 26 and the fourth guide plate on both sides of the transmission block trolley 2. The pressure plates 27 restrict the transmission block trolley 2 from moving in the vertical direction, ensuring that the transmission block trolley 2 only moves along both ends. The upper part of the transmission block trolley 2 is also provided with multiple grooves for matching with external structures. The second spring-pressing device 23 is installed at the other end of the transmission block trolley 2 relative to the second drive inclined guide plate 21. When the floating inserter 3 is in the second working state, the first spring-pressing device 32 of the mounting base 33 pushes the first drive inclined guide plate 31 to move upward. The second drive inclined guide plate 21 is also driven by the second spring-pressing device 23, and the transmission block trolley 2 moves horizontally relative to the mounting base 33.

[0033] The transmission block trolley 2 is equipped with the second spring-pressing device 23, which is the return nitrogen cylinder, at the other end opposite to the second drive inclined guide plate 21. In this embodiment, the second drive inclined guide plate 21 is installed at one end of the transmission block trolley 2. The floating insert 3 converts the up-and-down movement of the floating insert 3 into the left-and-right movement of the transmission block trolley 2 through the second drive inclined guide plate 21. The second spring-pressing device 23 is installed at the other end of the transmission block trolley 2. After the driving force at one end of the second drive inclined guide plate 21 disappears, the second spring-pressing device 23 will push the transmission block trolley 2 back to its initial position; that is, when the floating insert 3 is in the second... In the working state, the first spring-pressing device 32 of the mounting base 33 pushes the first driving inclined guide plate 31 to move upward. The second driving inclined guide plate 21 is also driven by the second spring-pressing device 23 of the transmission block trolley 2. The transmission block trolley 2 moves in the forward direction relative to the mounting base 33. It should be noted that the forward movement is the movement towards the mounting base 33. Therefore, the reverse movement mentioned later is the movement in the reverse direction relative to the mounting base 33. The third driving inclined guide plate 22 is installed on the side of the transmission block trolley 2. The third driving inclined guide plate 22 drives and guides the fourth driving inclined guide plate 11 of the movable punch 1.

[0034] The movable punch 1 is provided on the other side of the transmission block trolley 2. The movable punch 1 is inclined relative to the transmission block trolley 2. Flat guide plates 13 are installed on the bottom, top and sides of the movable punch 1, and pressure plates 27 are also provided on the upper sides of the sides to restrict the movement of the movable punch 1 along the direction perpendicular to the pressure plates 27, that is, the movable punch 1 moves along the wedge direction. The fourth driving inclined guide plate 11 is installed on the side of the movable punch 1. The transmission block trolley 2 converts the left and right movement into the movement of the movable punch 1 along the wedge direction through the third driving inclined guide plate 22, that is, along the attached Figure 1 The third direction of motion, that is, the upward or downward tilting direction, is provided by the third spring-pressing device 12 installed at the bottom of the movable punch 1. After the driving force of the fourth driving inclined guide plate 11 on the side disappears, the third spring-pressing device 12 provides the movable punch 1 with the initial retraction force.

[0035] The third spring-pressing device 12 is disposed at the bottom of the movable punch 1. The third driving inclined guide plate 22 is in contact with the surface of the fourth driving inclined guide plate 11. When the floating inserter 3 is in the first working state, the transmission block trolley 2 moves in the opposite direction to the mounting base 33. At this time, the third driving inclined guide plate 22 moves laterally relative to the fourth driving inclined guide plate 11, and simultaneously pushes the movable punch 1 to move upward along the wedge direction. When the floating inserter 3 is in the second working state, the transmission block trolley 2 moves forward relative to the mounting base 33. At this time, the fourth driving inclined guide plate 11 moves downward along the wedge direction under the push of the third spring-pressing device 12 of the movable punch 1 until the inclined surfaces of the third driving inclined guide plate 22 and the fourth driving inclined guide plate 11 are completely in contact.

[0036] In summary: When the moving mechanism starts working, the mounting base 33, driven by the upper mold, moves vertically downwards along the direction of motion shown in Appendix 1, i.e., the direction of motion is vertical. It should be noted that the vertical direction refers to the direction relative to the mounting base 33. The first driving guide plate 31 acts on the second driving guide plate 21, thereby driving the transmission block trolley 2 along the direction shown in Appendix 1. Figure 1 The second direction of movement is horizontal leftward. It should be noted that this horizontal leftward movement is relative to the position of the mounting base 33. The third drive guide plate 22 acts on the fourth drive guide plate 11, thereby driving the movable punch 1 along the attached... Figure 1 The upper die wedge moves upwards in an inclined direction. It should be noted that the inclined direction refers to the direction along the wedge, that is, the direction along which the punch is installed. After the movable punch 1 moves into place, the upper die wedge begins to be flanged.

[0037] When the moving mechanism completes its work, after the moving punch 1 has finished moving, the upper die begins to open, the driving force applied by the upper die to the floating insert 3 disappears, and the mounting base 33 begins to move along the attached... Figure 1The motion direction is vertically upward. The force exerted by the first driving inclined guide plate 31 on the second driving inclined guide plate 21 disappears. Under the action of the second spring-loaded device 23, the transmission block trolley 2 moves horizontally to the right along the motion direction. At the same time, the force exerted by the third driving inclined guide plate 22 on the fourth driving inclined guide plate 11 also disappears. Under the action of gravity and the third spring-loaded device 12, the movable punch 1 begins to move downward along the motion direction until it returns to its original position. Then, the robot enters the mold to grab the part and sends it to the next mold. This application sets the driving insert structure as a lower floating structure, increases the mold opening space, effectively improves the mold production cycle, and provides a new mold structure. The mechanical transmission drive between the components is stable and reliable. The driving surface of the floating insert 3 driving inclined guide plate adopts a 5-degree angle treatment, which effectively solves the on-site problem of jamming between driving inclined guide plates.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A side-mounted movable punch driving structure, characterized in that, include: The device comprises a movable punch, a transmission block trolley, and a floating insert. The floating insert has a first driving inclined guide plate on one side, with a first inclined surface. The transmission block trolley has a second driving inclined guide plate, with a second inclined surface. The first inclined surface can connect with the second inclined surface. The transmission block trolley also has a third driving inclined guide plate. The movable punch has a fourth driving inclined guide plate, with a third inclined surface. The fourth driving inclined guide plate has a fourth inclined surface, with the third and fourth inclined surfaces connecting with each other. The floating insert is connected to a first elastic pressing device. When the floating insert moves downwards, the first elastic pressing device generates a first elastic restoring force that drives the floating insert upwards. The floating insert is movably mounted on one side of the transmission block trolley. The floating insert has a mounting base on its exterior and guide plates on three sides. The first drive inclined guide plate is located on the other side of the floating insert. Side pins and assembly holes are provided on the guide plates on opposite sides. The side pins pass through the assembly holes and contact the floating insert. The floating insert has a structure that is narrow at the top and wide at the bottom. The bottom surface of the floating insert has a groove, and the lower part of the mounting base also has a through hole. The first spring-loaded device is connected to the groove through the through hole, and the first drive inclined guide plate is inclined downward.

2. The side-mounted movable punch driving structure according to claim 1, characterized in that, The transmission block trolley is equipped with a second elastic pressing device, and the movable punch is equipped with a third elastic pressing device. When the floating insert moves downward, the first inclined surface drives the second inclined surface to move parallel, and the third inclined surface pushes the fourth inclined surface to move obliquely upward. The second elastic pressing device generates a second elastic restoring force that drives the transmission block trolley to move horizontally, and the third elastic pressing device generates a third elastic restoring force that drives the movable punch to move in the tilting direction.

3. The side-mounted movable punch driving structure according to claim 1, characterized in that, The bottom, top, and sides of the transmission block trolley are respectively provided with a first guide plate, a second guide plate, a third guide plate, and a fourth guide plate. The second guide plate guides the upper mold at the top, and pressure plates are respectively provided above the third guide plate and the fourth guide plate on both sides of the transmission block trolley. The pressure plates restrict the transmission block trolley from moving in the up and down direction.

4. The side-mounted movable punch driving structure according to claim 1, characterized in that, The second drive inclined guide plate has a trapezoidal structure, and the inclined surface of the trapezoidal structure is arranged on the upper part of the vertical surface. The second drive inclined guide plate is in contact with the opposite surface of the first drive inclined guide plate, and the vertical surface is provided with an angle. When the floating insert is in the first working state, the first drive inclined guide plate moves downward and pushes the second drive inclined guide plate to drive the transmission block trolley to move in the opposite direction relative to the mounting base.

5. The side-mounted movable punch driving structure according to claim 2, characterized in that, The second spring-loaded device is installed at the other end of the transmission block trolley relative to the second drive inclined guide plate. When the floating inserter is in the second working state, the first spring-loaded device of the mounting base pushes the first drive inclined guide plate to move upward, and the second drive inclined guide plate also moves the transmission block trolley horizontally relative to the mounting base under the drive of the second spring-loaded device.

6. The side-mounted movable punch driving structure according to claim 1, characterized in that, The movable punch is provided on the other side of the transmission block trolley. The movable punch is arranged at an angle relative to the transmission block trolley. Flat guide plates are installed on the bottom, top and sides of the movable punch, and pressure plates are also provided on the upper sides to restrict the movement of the movable punch along the direction perpendicular to the pressure plates.

7. The side-mounted movable punch driving structure according to claim 1, characterized in that, The contact surfaces of the third drive inclined guide plate and the fourth drive inclined guide plate are in contact. When the floating insert is in the first working state, the transmission block trolley moves horizontally in the opposite direction to the mounting base. At this time, the third drive inclined guide plate moves laterally relative to the fourth drive inclined guide plate, and at the same time pushes the movable punch to move upward along the inclined wedge direction.

8. The side-mounted movable punch driving structure according to claim 2, characterized in that, The third spring-pressing device is located at the bottom of the movable punch. When the floating insert is in the second working state, the transmission block trolley moves forward relative to the mounting base. At this time, the fourth drive inclined guide plate moves downward along the wedge direction under the push of the third spring-pressing device of the movable punch until the inclined surfaces of the third drive inclined guide plate and the fourth drive inclined guide plate are completely in contact.

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