A changing mechanism for a punch press

Abstract

The utility model provides a kind of replacement mechanism of punch die, including upper end fixed seat, punch die, sliding track block, limiting post, buffer mechanism, positioning mechanism, fixed electromagnetic coil and permanent magnet, the lower surface of upper end fixed seat is installed with six limiting posts, the lower surface of upper end fixed seat is installed with four buffer mechanisms, the lower surface of limiting post is installed with two sliding track blocks, the design solves the original device bolt fixed installation and disassembly is more inconvenient, leading to positioning and installation punch die also more complex, when using, the problem of lower replacement efficiency, the utility model structure is reasonable, by buffer mechanism, fixed electromagnetic coil, permanent magnet and positioning mechanism cooperation, realize the quick positioning punch die while being able to quickly install punch die, and when punch die is disassembled, punch die can be freely controlled the descending speed of punch die, to be more safe when punch die is disassembled, improve the service life of replacement mechanism.

Description

Technical Field

[0001] This utility model is a stamping die replacement mechanism, belonging to the field of stamping die technology. Background Technology

[0002] Stamping dies are special process equipment used in cold stamping to process materials (metal or non-metal) into parts (or semi-finished products). They are called cold stamping dies (commonly known as cold stamping molds). Stamping is a pressure processing method that uses dies mounted on a press to apply pressure to materials at room temperature, causing them to separate or undergo plastic deformation, thereby obtaining the desired parts. The die changing mechanism refers to a set of mechanical components and devices used to remove the stamping die from the die holder and install a new die on it. The purpose of the changing mechanism is to improve the efficiency and convenience of die changing and reduce downtime in production.

[0003] Chinese patent CN221231440U proposes a stamping die replacement mechanism. By setting up a tool placement component, a movable column, a pressing column, and a spring column, the pressing column can be used to adjust the position of the stud before the screw cap is tightened to secure the die during installation. This ensures the screw cap can be directly fitted onto the stud, thus accelerating die installation and ensuring normal stamping operation. However, the bolt fixing and disassembly are inconvenient, making die positioning and installation complex and resulting in low replacement efficiency. Therefore, a stamping die replacement mechanism is urgently needed to solve these problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a stamping die replacement mechanism to solve the problems mentioned in the background. This invention has a reasonable structure, and through the cooperation of a buffer mechanism, a fixed electromagnetic coil, a permanent magnet, and a positioning mechanism, it can quickly position and install the stamping die. Furthermore, during disassembly, the descent speed of the stamping die can be freely controlled, making the disassembly and assembly of the stamping die safer and improving the service life of the replacement mechanism.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a stamping die replacement mechanism, comprising an upper fixed base, a stamping die, sliding rail blocks, limiting posts, buffer mechanisms, positioning mechanisms, a fixed electromagnetic coil, and a permanent magnet. Six limiting posts are mounted on the lower surface of the upper fixed base, four buffer mechanisms are mounted on the lower surface of the upper fixed base, two sliding rail blocks are mounted on the lower surface of the limiting posts, the stamping die is mounted on the inner side of each sliding rail block, two positioning mechanisms are mounted on the inner side of each sliding rail block, a permanent magnet is mounted on the upper surface of the stamping die, and a fixed electromagnetic coil is mounted on the lower surface of the upper fixed base. The buffer mechanism includes a buffer tube, a telescopic rod, a buffer electromagnetic coil, and a piston. Four buffer tubes are installed inside the upper fixed base, each containing a buffer electromagnetic coil. A piston is installed inside each buffer tube, and a telescopic rod is installed on the lower surface of the piston. The positioning mechanism includes a positioning block, a pull rod, a knob, a return spring, a return cavity, and a pull plate. A positioning block is installed inside the sliding track block, and a pull plate is installed inside the positioning block. A pull rod is installed at one end of the pull plate. A return cavity is formed inside the sliding track, and a return spring is installed inside the return cavity. A knob is installed at one end of the pull rod.

[0006] Furthermore, three limiting posts are respectively installed on both sides of the lower surface of the upper fixing seat. The lower end of each limiting post is provided with the same sliding track block. The lower end of the limiting post is fixedly connected to the sliding track block. Limiting holes are opened on the lower surface of the upper fixing seat. A limiting circular plate is installed on the upper surface of each limiting post. Each limiting circular plate is installed inside the corresponding limiting hole. The diameter of the limiting hole is the same as the diameter of the limiting circular plate. Each limiting post penetrates the lower surface of the upper fixing seat.

[0007] Furthermore, the buffer tube is provided with an electromagnetic coil cavity, and the buffer tube is provided with a magnetorheological fluid cavity. The magnetorheological fluid cavity is located inside the electromagnetic coil cavity, and the electromagnetic coil is installed inside the electromagnetic coil cavity. The magnetorheological fluid cavity is filled with magnetorheological fluid. The piston has four piston holes on its surface, and the lower end of the telescopic rod is fixedly connected to the sliding track block.

[0008] Furthermore, a mold groove is provided on the lower surface of the upper fixing seat, the upper surface of the mold groove is installed on the fixing electromagnetic coil, and the permanent magnet is located directly below the fixing electromagnetic coil.

[0009] Furthermore, the four positioning mechanisms are respectively installed at the front and rear ends of the stamping die, the positioning block is installed inside the reset cavity, the inner surface of the positioning block penetrates the inner end face of the sliding track block, and the positioning block has a positioning cavity inside.

[0010] Furthermore, the pull plate is installed inside the positioning cavity, the return spring is located on the circumferential surface of the pull rod, the pull rod is connected to the sliding track block by a thread, and the knob is installed on the outer surface of the sliding track block.

[0011] Furthermore, each of the sliding track blocks is equipped with a sliding guide rail on its inner side, and each of the sliding guide rails has a roller groove on its upper surface. Each of the roller grooves is equipped with several guide rollers, and the upper end of the circumferential surface of each guide roller is in close contact with the stamping die.

[0012] The beneficial effects of this utility model are as follows: This utility model provides a stamping die replacement mechanism. Because it adds a buffer tube, telescopic rod, buffer electromagnetic coil, positioning block, pull rod, knob, return spring, and pull plate, when replacing the stamping die, first, the buffer electromagnetic coil is energized, and then the fixed electromagnetic coil is de-energized. When the buffer electromagnetic coil generates a magnetic field, the magnetorheological fluid becomes increasingly viscous as the magnetic field strengthens. At the same time, the speed at which the magnetorheological fluid passes through the piston hole slows down, thus hindering the piston's descent speed. At this time, the stamping die and the sliding track will slowly descend. When the stamping die has completely fallen, the limiting disc will land at the lowest end of the limiting hole. At the same time, the knob is rotated, which drives the pull rod to rotate. Since the pull rod and the sliding track block are connected by threads, the rotation of the pull rod will simultaneously drive the positioning block into the sliding track block, thus facilitating the removal of the stamping die. Attached Figure Description

[0013] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a stamping die replacement mechanism according to the present invention; Figure 2 This is a side cross-sectional view of the upper fixed seat in the stamping die replacement mechanism of this utility model. Figure 3 This is a schematic cross-sectional view of the upper end of the upper fixed seat in the stamping die replacement mechanism of this utility model. Figure 4 This is a cross-sectional schematic diagram of the sliding track block and positioning block in a stamping die replacement mechanism of this utility model; Figure 5 This is a schematic diagram showing the connection between the limiting circular plate and the limiting post in a stamping die replacement mechanism of this utility model; Figure 6 This is a cross-sectional schematic diagram of the sliding guide rail in a stamping die changing mechanism of this utility model; Figure 7This is a schematic diagram of the upper end of the stamping die in a stamping die replacement mechanism according to the present invention. In the diagram: 1-Upper fixed seat, 2-Stamping die, 3-Sliding track block, 31-Sliding guide rail, 32-Guide roller, 4-Limiting post, 41-Limiting circular plate, 5-Buffer mechanism, 51-Buffer tube, 511-Magnetorheological fluid cavity, 512-Electromagnetic coil cavity, 52-Telescopic rod, 53-Buffer electromagnetic coil, 54-Piston, 541-Piston hole, 6-Positioning mechanism, 61-Positioning block, 611-Positioning cavity, 62-Pull rod, 63-Knob, 64-Reset spring, 65-Reset cavity, 66-Pull plate, 7-Fixed electromagnetic coil, 8-Permanent magnet. Detailed Implementation

[0014] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0015] Please see Figures 1-7 This utility model provides a technical solution: a stamping die replacement mechanism, including an upper fixed base 1, a stamping die 2, sliding rail blocks 3, limiting posts 4, a buffer mechanism 5, a positioning mechanism 6, a fixed electromagnetic coil 7, and a permanent magnet 8. Six limiting posts 4 are installed on the lower surface of the upper fixed base 1, four buffer mechanisms 5 are installed on the lower surface of the upper fixed base 1, two sliding rail blocks 3 are installed on the lower surface of the limiting posts 4, the stamping die 2 is installed inside the sliding rail blocks 3, two positioning mechanisms 6 are installed inside each sliding rail block 3, a permanent magnet 8 is installed on the upper surface of the stamping die 2, a fixed electromagnetic coil 7 is installed on the lower surface of the upper fixed base 1, the buffer mechanism 5 includes a buffer tube 51, a telescopic rod 52, a buffer electromagnetic coil 53, and a piston 54, and the upper fixed base 1 has a fixed electromagnetic coil 7 installed inside. Four buffer tubes 51 are provided, each with a buffer electromagnetic coil 53 installed inside. A piston 54 is installed inside the buffer tube 51, and a telescopic rod 52 is installed on the lower surface of the piston 54. The positioning mechanism 6 includes a positioning block 61, a pull rod 62, a knob 63, a return spring 64, a return cavity 65, and a pull plate 66. The sliding track block 3 has a positioning block 61 installed inside, and a pull plate 66 is installed inside the positioning block 61. A pull rod 62 is installed at one end of the pull plate 66. A return cavity 65 is opened inside the sliding track, and a return spring 64 is installed inside the return cavity 65. A knob 63 is installed at one end of the pull rod 62. This design solves the problem that the original device was inconvenient to install and disassemble with bolts, which made positioning and installing the stamping die complicated and the replacement efficiency low during use.

[0016] As the first embodiment of this utility model: three limiting posts 4 are respectively installed on both sides of the lower surface of the upper fixing base 1. The lower end of each limiting post 4 is provided with the same sliding track block 3. The lower end of the limiting post 4 is fixedly connected to the sliding track block 3. Limiting holes are opened on the lower surface of the upper fixing base 1. A limiting circular plate 41 is installed on the upper surface of each limiting post 4. Each limiting circular plate 41 is installed inside the corresponding limiting hole. The diameter of the limiting hole is the same as the diameter of the limiting circular plate 41. Each limiting post 4 penetrates the upper surface of the upper fixing base 1. By adding a limiting post 4 to the lower surface of the end fixing seat 1, the downward pull force on the buffer mechanism 5 can be effectively reduced, thereby improving the service life of the buffer mechanism 5. An electromagnetic coil cavity 512 is provided inside the buffer tube 51, and a magnetorheological fluid cavity 511 is also provided inside the buffer tube 51. The magnetorheological fluid cavity 511 is located inside the electromagnetic coil cavity 512. The buffer electromagnetic coil 53 is installed inside the electromagnetic coil cavity 512. The magnetorheological fluid cavity 511 is filled with magnetorheological fluid. Four piston holes 54 are opened on the surface of the piston 54. 1. The lower end of the telescopic rod 52 is fixedly connected to the sliding track block 3. The descent speed of the telescopic rod 52 can be flexibly controlled by adding magnetorheological fluid. A mold groove is opened on the lower surface of the upper fixed seat 1. The upper surface of the mold groove is installed on the fixed electromagnetic coil 7. The permanent magnet 8 is located directly below the fixed electromagnetic coil 7. Four positioning mechanisms 6 are respectively installed at the front and rear ends of the stamping die 2. The positioning block 61 is installed inside the reset cavity 65. The inner surface of the positioning block 61 penetrates the inner end face of the sliding track block 3. The interior of the positioning block 61 is open. A positioning cavity 611 is provided, and a pull plate 66 is installed inside the positioning cavity 611. A return spring 64 is located on the circumferential surface of the pull rod 62. The pull rod 62 is connected to the sliding track block 3 by a thread. A knob 63 is installed on the outer surface of the sliding track block 3. A sliding guide rail 31 is installed on the inner side of each sliding track block 3. A roller groove is opened on the upper surface of each sliding guide rail 31. Several guide rollers 32 are installed inside each roller groove. The upper end of the circumferential surface of each guide roller 32 is in close contact with the stamping die 2.

[0017] As a second embodiment of this utility model: When installing the mold, press the positioning block 61 at one end into the sliding track block 3, then push the stamping mold 2 to be stuck on the sliding guide rail 31 and make the stamping mold 2 slide along the guide roller 32 above the sliding guide rail 31 until the positioning block 61, which is compressed into the sliding track block 3, is lifted by the reset spring 64. The stamping mold 2 is then initially fixed on the sliding track block 3. At this time, the fixed electromagnetic coil 7 is energized to generate a magnetic field, thereby attracting the permanent magnet 8 on the upper surface of the stamping mold 2. The stamping mold 2 and the sliding track block 3 are simultaneously attracted upwards, the limiting post 4 will enter the limiting hole, and the telescopic rod 52 will also enter the buffer tube 51, thereby fixing the stamping mold 2.

[0018] As the third embodiment of this utility model: When replacing the stamping die 2, first control the buffer electromagnetic coil 53 to be energized, and then de-energize the fixed electromagnetic coil 7. When the buffer electromagnetic coil 53 generates a magnetic field, the magnetorheological fluid will become more and more viscous as the magnetic field becomes stronger. At the same time, the speed of the magnetorheological fluid passing through the piston hole 541 will slow down, thereby hindering the descent speed of the piston 54. At this time, the stamping die 2 and the sliding track will descend slowly to prevent the stamping die 2 from falling suddenly due to excessive weight, which could cause a safety accident. When the stamping die 2 has completely fallen, the limiting disc 41 will land at the lowest end of the limiting hole. At this time, the limiting disc 41 will restrict the sliding track block 3 and the stamping die 2 from continuing to fall, thereby preventing the stamping die 2 from falling excessively and reducing the force on the telescopic rod 52. At the same time, the knob 63 is rotated, and the knob 63 drives the pulling rod 62 to rotate. Since the pulling rod 62 and the sliding track block 3 are connected by threads, when the pulling rod 62 rotates, it will simultaneously drive the positioning block 61 into the sliding track block 3, thereby facilitating the removal of the stamping die 2.

[0019] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0020] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A stamping die replacement mechanism, comprising an upper fixed base, a stamping die, a sliding track block, a limiting post, a buffer mechanism, a positioning mechanism, a fixed electromagnetic coil, and a permanent magnet, characterized in that: The lower surface of the upper fixed base is equipped with six limiting posts, four buffer mechanisms, two sliding rail blocks, a stamping die, and two positioning mechanisms. The upper surface of the stamping die is equipped with a permanent magnet, and the lower surface of the upper fixed base is equipped with a fixed electromagnetic coil. The buffer mechanism includes a buffer tube, a telescopic rod, a buffer electromagnetic coil, and a piston. Four buffer tubes are installed inside the upper fixed seat, and a buffer electromagnetic coil is installed inside each buffer tube. A piston is installed inside the buffer tube, and a telescopic rod is installed on the lower surface of the piston. The positioning mechanism includes a positioning block, a pull rod, a knob, a return spring, a return cavity, and a pull plate. The positioning block is installed inside the sliding track block, the pull plate is installed inside the positioning block, a pull rod is installed at one end of the pull plate, a return cavity is opened inside the sliding track, a return spring is installed inside the return cavity, and a knob is installed at one end of the pull rod.

2. The stamping die changing mechanism according to claim 1, characterized in that: Three limiting posts are installed on both sides of the lower surface of the upper fixing seat. The lower end of each limiting post is provided with the same sliding track block. The lower end of the limiting post is fixedly connected to the sliding track block. Limiting holes are opened on the lower surface of the upper fixing seat. A limiting circular plate is installed on the upper surface of each limiting post. Each limiting circular plate is installed inside the corresponding limiting hole. The diameter of the limiting hole is the same as the diameter of the limiting circular plate. Each limiting post penetrates the lower surface of the upper fixing seat.

3. The stamping die changing mechanism according to claim 1, characterized in that: The buffer tube has an electromagnetic coil cavity inside, and a magnetorheological fluid cavity inside the buffer tube. The magnetorheological fluid cavity is located inside the electromagnetic coil cavity, and the electromagnetic coil is installed inside the electromagnetic coil cavity. The magnetorheological fluid cavity is filled with magnetorheological fluid. The piston has four piston holes on its surface, and the lower end of the telescopic rod is fixedly connected to the sliding track block.

4. The stamping die changing mechanism according to claim 1, characterized in that: The lower surface of the upper fixing base is provided with a mold groove, the upper surface of the mold groove is installed on the fixing electromagnetic coil, and the permanent magnet is located directly below the fixing electromagnetic coil.

5. The stamping die changing mechanism according to claim 1, characterized in that: The four positioning mechanisms are respectively installed at the front and rear ends of the stamping die. The positioning block is installed inside the reset cavity. The inner surface of the positioning block penetrates the inner end face of the sliding track block. The positioning block has a positioning cavity inside.

6. The stamping die changing mechanism according to claim 5, characterized in that: The pull plate is installed inside the positioning cavity, the return spring is located on the circumferential surface of the pull rod, the pull rod is connected to the sliding track block by a thread, and the knob is installed on the outer surface of the sliding track block.

7. The stamping die changing mechanism according to claim 1, characterized in that: Each of the sliding track blocks is equipped with a sliding guide rail on its inner side. Each of the sliding guide rails has a roller groove on its upper surface. Each roller groove has several guide rollers installed inside it. The upper end of the circumferential surface of each guide roller is in close contact with the stamping die.

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