A high-precision punching device

Abstract

The application provides a high-precision punching device and relates to the field of punching dies.The high-precision punching device comprises a punch body, a fixing seat is arranged on the upper end face of the punch body, a front and back adjusting part is arranged on the upper end face of the fixing seat, a left and right adjusting part is arranged on the top of the front and back adjusting part, a lower die seat is arranged on the top of the left and right adjusting part, and a second guide column is fixedly connected to each of the four corner positions on the upper end face of the lower die seat.The application is provided with a cylindrical roller B, so that the second guide column and the bushing are not prone to serious wear, the misalignment between the second guide column and the second bushing is avoided, and the machining precision of the punching device is greatly improved.The application solves the problem that the machining precision of the punching die is affected due to the serious wear between the guide column and the bushing in the actual use of the traditional punching die.

Description

Technical Field

[0001] This invention relates to the field of punching die technology, and in particular to a high-precision punching device. Background Technology

[0002] Currently, cold stamping of sheet materials (metal or non-metal) requires the use of punching dies (stamping dies). While traditional punching dies have guide posts between the upper and lower die bases, the large sliding contact area between the guide posts and bushings (usually fixedly embedded inside the upper die base) makes them prone to severe wear. Severe wear can lead to misalignment between the guide posts and bushings, affecting the machining accuracy of the punching die. Furthermore, when processing sheet materials of different thicknesses, traditional punching dies require replacing the corresponding height cutting head, which necessitates the use of tools, reducing the convenience of processing sheet materials of varying thicknesses. Additionally, disassembly and maintenance of traditional punching dies are inefficient because the upper and lower die bases are fixed to corresponding positions on the press with numerous bolts. Summary of the Invention

[0003] In view of this, the present invention provides a high-precision punching device to solve the problem that in the actual use of traditional punching dies, due to the large sliding contact area between the guide post and the bushing, severe wear easily occurs between the guide post and the bushing, which affects the processing accuracy of the punching die once the wear is severe.

[0004] This invention provides a high-precision punching device, specifically comprising: a punch press body; a fixed seat mounted on the upper end face of the punch press body, and a front-to-back adjustment part provided on the upper end face of the fixed seat, and a left-to-right adjustment part provided on the top of the front-to-back adjustment part; a lower die seat mounted on the top of the left-to-right adjustment part, and a second guide post fixedly connected to each of the four corners of the upper end face of the lower die seat, a second bushing slidably connected to the upper end of each second guide post, and an upper die seat fixedly mounted on the outside of the four second bushings, and a spring sleeved on the outside of each second guide post; two T-shaped slide bars symmetrically arranged on the upper end face of the fixed seat.

[0005] Furthermore, a first strip-shaped groove is provided in the middle of the bottom end face of the front and rear adjustment part, and a front and rear adjustment nut is fixedly installed inside the first strip-shaped groove; a front and rear adjustment screw is connected inside the front and rear adjustment nut by a thread, and the front and rear adjustment screw is rotatably connected to the middle of the upper end face of the fixed seat; a T-shaped sliding groove is provided in a left-right symmetrical shape on the bottom end face of the front and rear adjustment part, which is slidably connected to two T-shaped sliding bars, and two T-shaped sliders are provided in a front-back symmetrical shape on the upper end face of the front and rear adjustment part.

[0006] Furthermore, a second strip-shaped groove is provided in the middle of the bottom end face of the left and right adjustment part, and a left and right adjustment nut is fixedly installed inside the second strip-shaped groove. The left and right adjustment nut is connected to a left and right adjustment screw through a thread, and the left and right adjustment screw is rotatably connected to the front and rear adjustment part. A limit plate is fixedly installed in the middle of the rear side of the upper end face of the left and right adjustment part, and two T-shaped sliding grooves are provided in a front-to-back symmetrical shape on the bottom end face of the left and right adjustment part. The two T-shaped sliding grooves provided in the bottom end face of the left and right adjustment part are slidably connected to two T-shaped sliders on the front and rear adjustment part, respectively. Two dovetail-shaped sliding strips are provided in a left-to-right symmetrical shape on the upper end face of the left and right adjustment part.

[0007] Furthermore, the bottom end face of the lower mold base has two dovetail-shaped grooves that are symmetrically formed and slidably connected to two dovetail-shaped slide bars. A lower clamping plate is fixedly installed in the middle of the upper end face of the lower mold base. A first bushing is fixedly embedded in the interior of each of the four corners of the lower clamping plate. A first guide post is slidably connected inside each first bushing. A lower pressure plate is fixedly connected to the upper end of the four first guide posts. An adjusting pad is placed on the upper end face of the lower pressure plate. Four limiting inserts are fixedly connected to the bottom end face of the adjusting pad. Four limiting insertion holes for insertion into the four limiting inserts are formed on the upper end face of the lower pressure plate. A plug-in plate is fixedly connected in the middle of the rear end face of the lower mold base. A rectangular insertion interface is formed on the upper end face of the plug-in plate. A positioning groove is formed on the upper end face of the adjusting pad. A tubular outer diameter cutter is fixedly installed inside the lower clamping plate. The tubular outer diameter cutter penetrates the lower clamping plate, the lower pressure plate, and the adjusting pad.

[0008] Furthermore, both the first guide post and the second guide post are octagonal prisms, and the four end faces of the first guide post are uniformly provided with first rectangular grooves, and each first rectangular groove is rotatably connected to a cylindrical roller A, which is in rolling connection with the inner side of the first bushing; each first guide post is fitted with a spring.

[0009] Furthermore, the second guide post has uniformly formed second rectangular grooves on its front, rear, left, and right end faces, and each second rectangular groove is rotatably connected to a cylindrical roller B. The cylindrical roller B is rotatably connected to the inner side of the second bushing, and the four second bushings are respectively fixedly embedded in the four corners of the upper mold base.

[0010] Furthermore, an upper clamping plate is fixedly installed in the middle of the bottom end face of the upper mold base, and an upper pressure plate is fixedly installed at the bottom of the upper clamping plate; an outer diameter concave knife is fixedly installed inside the upper pressure plate at the bottom of the upper clamping plate, and the outer diameter concave knife is in the shape of a rectangular tube; an inner hole cutter is fixedly installed inside the upper clamping plate, and a top core is slidably connected to the lower end of the outer side of the inner hole cutter; an annular limiting block is provided at the upper end of the top core, and a limiting cylinder is slidably connected to the outer side of the annular limiting block; the limiting cylinder is fixed to the bottom end face of the upper clamping plate; a spring is sleeved on the top of the annular limiting block outside the inner hole cutter; the inner hole cutter and the tubular outer diameter cutter are on the same axis.

[0011] Furthermore, it also includes a locking component, which is disposed on the rear end face of the limiting plate. The locking component includes a locking slide cylinder, a locking slider, a T-shaped pull rod, and a connecting strip. The locking slide cylinder is fixedly installed on the rear end face of the limiting plate, and a locking slider is slidably connected inside the locking slide cylinder. The upper end of the locking slider is provided with a T-shaped pull rod that penetrates the top of the locking slide cylinder, and a spring is sleeved on the outside of the T-shaped pull rod inside the locking slide cylinder. A connecting strip that penetrates the bottom of the locking slide cylinder is fixedly connected to the bottom of the locking slider, and the front edge of the lower end of the connecting strip is chamfered.

[0012] Furthermore, when the locking component is in the locked state, the lower end of the plug bar is plugged into the rectangular plug interface opened on the upper surface of the plug plate.

[0013] The high-precision punching device provided by this invention has the following beneficial effects:

[0014] 1. The present invention features uniformly formed second rectangular grooves on the front, rear, left, and right end faces of the second guide post, with a cylindrical roller B rotatably connected inside each second rectangular groove. The cylindrical roller B rolls with the inner side of the second bushing, thus preventing the second guide post from contacting the inner side of the second bushing. Due to the small contact area between the cylindrical roller B and the inner side of the second bushing, severe wear between the second guide post and the bushing is less likely to occur, avoiding misalignment between the second guide post and the second bushing. Furthermore, under the action of the cylindrical roller B, the second guide post can only move linearly up and down and cannot rotate, thereby greatly improving the processing accuracy of the punching device.

[0015] 2. By replacing the adjusting pads of different thicknesses, this invention allows for the replacement of the adjusting pads of different thicknesses when encountering sheet materials of different thicknesses during processing. This eliminates the need to replace the corresponding height punching head when encountering sheet materials of different thicknesses, thus effectively improving the convenience of this punching device when processing sheet materials of different thicknesses.

[0016] 3. By setting up an outer diameter concave cutter and an inner hole cutter, the present invention can perform punching operations on plate-shaped materials at the same time as punching, thereby enabling the plate-shaped materials to be processed into shape in one go, thus eliminating the need for multiple punching and punching operations, and greatly improving the processing efficiency of the punching device.

[0017] 4. This invention, through the cooperation of the plug-in plate and the locking component, allows the upper die holder to be removed from the slide block of the punch press when the punching die needs to be disassembled for maintenance. Then, the T-shaped pull rod is manually pulled upward to pull the plug-in strip out from the rectangular plug-in interface on the plug-in plate. Finally, the lower die holder is slid forward from the upper part of the left and right adjustment part for maintenance. Moreover, since the lower die holder can be quickly removed without tools during the disassembly of the punching die, the disassembly efficiency of the entire punching die is increased by 30% to 40%. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0019] In the attached diagram:

[0020] Figure 1 This is a first-view structural schematic diagram of an embodiment of the present invention.

[0021] Figure 2 This is a second-view structural schematic diagram of an embodiment of the present invention.

[0022] Figure 3 This is a structural diagram of an embodiment of the present invention in a split state.

[0023] Figure 4 This is a structural diagram of the fixed base, front-to-back adjustment part, and left-to-right adjustment part in the disassembled state of an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the disassembled structure of the lower mold base, lower clamping plate, lower pressure plate, and adjusting pad block according to an embodiment of the present invention.

[0025] Figure 6 This is an embodiment of the present invention. Figure 5 A magnified schematic diagram of the structure at point A in the middle.

[0026] Figure 7 This is a partial cross-sectional view of the upper mold base according to an embodiment of the present invention.

[0027] Figure 8 This is a schematic diagram of the structure of the second guide post and the second bushing after disassembly according to an embodiment of the present invention.

[0028] Figure 9 This is an embodiment of the present invention. Figure 8A magnified schematic diagram of the structure at point B in the middle.

[0029] Figure 10 This is a partial cross-sectional structural diagram of the lower mold base, lower clamping plate, lower pressure plate, adjusting pad, upper mold base, upper clamping plate, upper pressure plate, and outer diameter concave die according to an embodiment of the present invention.

[0030] Figure 11 This is a schematic diagram of the upper clamping plate and upper pressure plate after disassembly according to an embodiment of the present invention.

[0031] Figure 12 This is a schematic diagram of the locking component structure according to an embodiment of the present invention.

[0032] List of reference numerals

[0033] 1. Punch press body; 2. Fixed base; 3. Front and rear adjustment part; 301. First strip groove; 302. Front and rear adjustment nut; 303. Front and rear adjustment screw; 4. Left and right adjustment part; 401. Limiting plate; 402. Second strip groove; 403. Left and right adjustment nut; 404. Left and right adjustment screw; 5. Lower die base; 501. Lower clamping plate; 502. Lower pressure plate; 503. Adjusting pad; 504. Insertion plate; 505. Limiting insertion post; 506. Limiting insertion hole; 507. First bushing; 508. First guide post; 509. 5010, Rectangular groove; 5011, Cylindrical roller A; 5012, Positioning groove; 5013, Tubular outer diameter cutter; 6, Second guide post; 601, Second bushing; 602, Second rectangular groove; 603, Cylindrical roller B; 7, Upper mold base; 701, Upper clamping plate; 702, Upper pressure plate; 703, Outer diameter concave cutter; 704, Inner hole cutter; 705, Limiting cylinder; 706, Top core; 707, Annular limiting block; 8, Locking component; 801, Locking slide cylinder; 802, Locking slider; 803, T-shaped tie rod; 804, Insertion strip. Detailed Implementation

[0034] To make the objectives, solutions, and advantages of the technical solutions of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present invention.

[0035] Example 1: As Figures 1 to 12As shown: This invention provides a high-precision punching device, including a punch press body 1; a fixed seat 2 is installed on the upper end face of the punch press body 1, and a front-to-back adjustment part 3 is provided on the upper end face of the fixed seat 2, and a left-to-right adjustment part 4 is provided on the top of the front-to-back adjustment part 3; a lower die seat 5 is installed on the top of the left-to-right adjustment part 4, and a second guide post 6 is fixedly connected to each of the four corners of the upper end face of the lower die seat 5. A second bushing 601 is slidably connected to the upper end of each second guide post 6, and an upper die seat 7 is fixedly installed on the four second bushings 601. The upper die seat 7 is installed on the slide block of the punch press, and a spring is sleeved on the outside of each second guide post 6; two T-shaped slide bars are provided symmetrically on the upper end face of the fixed seat 2.

[0036] The front-rear adjustment part 3 has a first strip-shaped groove 301 in the middle of its bottom end face, and a front-rear adjustment nut 302 is fixedly installed inside the first strip-shaped groove 301; a front-rear adjustment screw 303 is threadedly connected inside the front-rear adjustment nut 302, and the front-rear adjustment screw 303 is rotatably connected to the middle of the upper end face of the fixed base 2; the bottom end face of the front-rear adjustment part 3 has T-shaped sliding grooves that slide and connect with two T-shaped sliding bars in a symmetrical manner, and two T-shaped sliding blocks are provided in a symmetrical manner on the upper end face of the front-rear adjustment part 3; the bottom end face of the left-right adjustment part 4 has a second strip-shaped groove 402 in the middle of its bottom end face, and a left-right adjustment nut 403 is fixedly installed inside the second strip-shaped groove 402, and the left-right adjustment nut 403 is fixedly installed inside the left-right adjustment nut 402. Internally, a left-right adjusting screw 404 is threadedly connected to the front-rear adjusting part 3. The left-right adjusting screw 404 is rotatably connected to the front-rear adjusting part 3. A limiting plate 401 is fixedly installed in the middle of the rear side of the upper end face of the left-right adjusting part 4. The bottom end face of the left-right adjusting part 4 has two T-shaped sliding grooves symmetrically arranged front-rear. The two T-shaped sliding grooves on the bottom end face of the left-right adjusting part 4 are slidably connected to two T-shaped sliders on the front-rear adjusting part 3. The upper end face of the left-right adjusting part 4 has two dovetail-shaped sliding strips symmetrically arranged. The front-rear adjusting part 3 and the left-right adjusting part 4 are used to adjust the position of the lower mold base 5 in the front, back, left and right directions, so that it is more convenient to align the upper mold base 7 with the slider.

[0037] The bottom end face of the lower die base 5 is symmetrically provided with two dovetail-shaped grooves that slide and connect with two dovetail-shaped slide bars. A lower clamping plate 501 is fixedly installed in the middle of the upper end face of the lower die base 5. A first bushing 507 is fixedly embedded in the four corners of the lower clamping plate 501. A first guide post 508 is slidably connected inside each first bushing 507. A lower pressure plate 502 is fixedly connected to the upper end of the four first guide posts 508. An adjusting pad 503 is placed on the upper end face of the lower pressure plate 502. There are multiple adjusting pads 503, and the thickness of the multiple adjusting pads 503 is different. By adjusting the pads 503 of different thicknesses, the distance between the plate material and the lower end of the outer diameter concave cutter 703 and the inner hole cutter 704 can be adjusted. By changing the adjusting pads 503 of different thicknesses, it is not necessary to change the corresponding height punching head when encountering plate materials of different thicknesses, thus effectively improving the convenience of this punching device when processing plate materials of different thicknesses.

[0038] Four limiting pins 505 are fixedly connected to the bottom end of the adjusting pad 503. The upper end of the lower pressure plate 502 is provided with four limiting insertion holes 506 for insertion into the four limiting pins 505. A plug-in plate 504 is fixedly connected to the middle of the rear end face of the lower mold base 5, and a rectangular plug-in interface is provided on the upper end face of the plug-in plate 504. A positioning groove 5011 is provided on the upper end face of the adjusting pad 503. A tubular outer diameter cutter 5012 is fixedly installed inside the lower clamping plate 501. The tubular outer diameter cutter 5012 passes through the lower clamping plate 501, the lower pressure plate 502 and the adjusting pad 503.

[0039] Both the first guide post 508 and the second guide post 6 are octagonal prisms. The first guide post 508 has a first rectangular groove 509 evenly distributed on its four end faces (front, rear, left, and right). Each first rectangular groove 509 is rotatably connected to a cylindrical roller A5010, which is in rolling contact with the inner side of the first bushing 507. Each first guide post 508 is fitted with a spring. The cylindrical roller A5010 reduces the friction between the first guide post 508 and the first bushing 507.

[0040] The second guide post 6 has uniformly spaced second rectangular grooves 602 on its four end faces (front, rear, left, and right). Each second rectangular groove 602 has a cylindrical roller B603 rotatably connected inside it. The cylindrical roller B603 rolls with the inner side of the second bushing 601. The four second bushings 601 are fixedly embedded in the four corners of the upper mold base 7. The second guide post 6 has uniformly spaced second rectangular grooves 602 on its four end faces (front, rear, left, and right). Cylindrical rollers B603 are rotatably connected inside the device. The cylindrical rollers B603 are in rolling contact with the inner side of the second bushing 601, so that the second guide post 6 will not contact the inner side of the second bushing 601. Since the contact area between the cylindrical rollers B603 and the inner side of the second bushing 601 is small, it is not easy for the second guide post 6 and the bushing to suffer from severe wear. This ensures that the second guide post 6 and the second bushing 601 can always be in a coaxial state, thereby greatly improving the processing accuracy of this punching device.

[0041] An upper clamping plate 701 is fixedly installed in the middle of the bottom end face of the upper mold base 7, and an upper pressure plate 702 is fixedly installed at the bottom of the upper clamping plate 701; an outer diameter concave knife 703 is fixedly installed at the bottom of the upper clamping plate 701 inside the upper pressure plate 702, and the outer diameter concave knife 703 is rectangular tubular in shape; an inner hole cutter 704 is fixedly installed inside the upper clamping plate 701, and a top core 706 is slidably connected to the lower end of the outer side of the inner hole cutter 704; an annular limiting block 707 is provided at the upper end of the top core 706, and a limiting cylinder 705 is slidably connected to the outer side of the annular limiting block 707; the limiting cylinder 705 is fixed to the bottom end face of the upper clamping plate 701; a spring is sleeved on the top of the annular limiting block 707 outside the inner hole cutter 704; the inner hole cutter 704 and the tubular outer diameter cutter 5012 are on the same axis.

[0042] Example 2: Based on Example 1, such as Figure 3 and Figure 12 As shown: It also includes a locking component 8, which is disposed on the rear end face of the limiting plate 401. The locking component 8 includes a locking slide cylinder 801, a locking slider 802, a T-shaped pull rod 803, and a connecting strip 804. The locking slide cylinder 801 is fixedly installed on the rear end face of the limiting plate 401, and the locking slider 802 is slidably connected inside the locking slide cylinder 801. The upper end of the locking slider 802 is provided with a T-shaped pull rod 803 that penetrates the top of the locking slide cylinder 801, and a spring is sleeved on the outside of the T-shaped pull rod 803 inside the locking slide cylinder 801. The bottom of the locking slider 802 is fixedly connected with a connecting strip 804 that penetrates the bottom of the locking slide cylinder 801, and the front edge of the lower end of the connecting strip 804 is chamfered.

[0043] When the locking component 8 is in the locked state, the lower end of the plug bar 804 is plugged into the rectangular plug-in interface opened on the upper surface of the plug plate 504. Through the cooperation between the plug plate 504 and the locking component 8, when the punching die is disassembled and maintained, it is only necessary to remove the upper die holder 7 from the slide of the punch press, then pull the T-shaped tie rod 803 upward, and finally slide the lower die holder 5 forward from the upper part of the left and right adjustment part 4 for maintenance, thereby making the disassembly efficiency of the entire punching die more efficient.

[0044] The specific usage and function of this embodiment: In this invention, when punching a plate-shaped material, the plate-shaped material is first placed inside the positioning groove 5011 on the adjusting pad 503. Under the action of the positioning groove 5011, the horizontal direction is limited. Then, the upper die holder 7 is punched downward by the slider on the punch press, thereby moving the upper clamping plate 701, upper pressure plate 702, outer diameter concave knife 703, inner hole cutter 704 and top core 706 downward. Then, the plate-shaped material is punched by the outer diameter concave knife 703, and then the center part of the plate-shaped material is punched by the inner hole cutter 704. Thus, this punching device can perform punching operation at the same time as punching. Then, the outer diameter punching operation of the plate-shaped material is performed by the tubular outer diameter cutter 5012, thus completing the punching work of the plate-shaped material.

[0045] During the downward movement of the upper mold base 7, a second rectangular groove 602 is uniformly formed on the front, rear, left, and right end faces of the second guide post 6. Each second rectangular groove 602 is rotatably connected to a cylindrical roller B603. The cylindrical roller B603 is in rolling contact with the inner side of the second bushing 601, so that the second guide post 6 will not contact the inner side of the second bushing 601. Since the contact area between the cylindrical roller B603 and the inner side of the second bushing 601 is small, it is not easy for the second guide post 6 and the bushing to experience severe wear. This avoids the phenomenon of misalignment between the second guide post 6 and the second bushing 601, thereby improving the machining accuracy.

[0046] When encountering a plate material of a different thickness, the corresponding thickness adjustment shim 503 is first replaced according to the thickness of the plate material. By replacing the adjustment shim 503 of different thicknesses, the distance between the plate material and the lower end of the outer diameter concave knife 703 and the inner hole cutter 704 is adjusted, so that when encountering plate materials of different thicknesses, it is not necessary to replace the corresponding height punching head.

[0047] When the punching die needs to be disassembled and maintained, first remove the upper die holder 7 from the slide of the punch press, and then manually pull the T-shaped tie rod 803 upward, thereby moving the locking slide 802 and the plug bar 804 upward, so that the plug bar 804 is pulled out from the rectangular plug-in interface on the plug plate 504. Then slide the lower die holder 5 forward from the upper part of the left and right adjustment part 4 and remove it. Then the punching die (upper die holder 7 and lower die holder 5, etc.) can be maintained.

Claims

1. A high-precision punching device, comprising: The punch press body (1) is equipped with a fixed seat (2) on the upper end face of the punch press body (1), and the fixed seat (2) is provided with a front and rear adjustment part (3) on the upper end face of the fixed seat (2), and the front and rear adjustment part (3) is provided with a left and right adjustment part (4) on the top of the front and rear adjustment part (3); characterized in that a lower die seat (5) is installed on the top of the left and right adjustment part (4), and a second guide post (6) is fixedly connected to each of the four corners of the upper end face of the lower die seat (5), and a second bushing (601) is slidably connected to the upper end of each second guide post (6), and an upper die seat (7) is fixedly installed on the outside of the four second bushings (601), and a spring is sleeved on the outside of each second guide post (6); the fixed seat (2) is provided with two T-shaped slide bars on the upper end face of the fixed seat (2); The front and rear adjustment part (3) has a first strip groove (301) in the middle of the bottom end face, and a front and rear adjustment nut (302) is fixedly installed inside the first strip groove (301); the front and rear adjustment nut (302) is connected to the front and rear adjustment screw (303) that rotates on the upper end face of the fixed seat (2) by a thread; the bottom end face of the front and rear adjustment part (3) is provided with a T-shaped sliding groove that is slidably connected to two T-shaped sliding bars, and the upper end face of the front and rear adjustment part (3) is provided with two T-shaped sliding blocks; The left and right adjustment part (4) has a second strip groove (402) in the middle of the bottom end face, and a left and right adjustment nut (403) is fixedly installed inside the second strip groove (402). The left and right adjustment nut (403) is connected to the left and right adjustment screw (404) rotating on the upper end face of the front and rear adjustment part (3) by a thread. A limit plate (401) is fixedly installed in the middle of the rear side of the upper end face of the left and right adjustment part (4), and two T-shaped sliding grooves are opened on the bottom end face of the left and right adjustment part (4). The two T-shaped sliding grooves on the bottom end face of the left and right adjustment part (4) are slidably connected to two T-shaped sliders on the front and rear adjustment part (3). Two dovetail-shaped sliding strips are provided on the upper end face of the left and right adjustment part (4) in a left-right symmetrical shape. The bottom end face of the lower mold base (5) is provided with two dovetail-shaped grooves that are slidably connected to two dovetail-shaped slide bars. A lower clamping plate (501) is fixedly installed in the middle of the upper end face of the lower mold base (5). A first bushing (507) is fixedly embedded in the four corners of the lower clamping plate (501). A first guide post (508) is slidably connected inside each first bushing (507). A lower pressure plate (502) is fixedly connected to the upper end of the four first guide posts (508). An adjusting pad (503) is placed on the upper end face of the lower pressure plate (502). The bottom end face of the adjusting pad (503) is fixedly connected to four limiting rods. The upper end face of the lower pressure plate (502) is provided with four limiting insertion holes (506) for insertion into the four limiting insertion pins (505); the middle of the rear end face of the lower mold base (5) is fixedly connected to the insertion plate (504), and the upper end face of the insertion plate (504) is provided with a rectangular insertion interface; the upper end face of the adjusting pad (503) is provided with a positioning groove (5011); a tubular outer diameter cutter (5012) is fixedly installed inside the lower clamping plate (501), and the tubular outer diameter cutter (5012) penetrates the lower clamping plate (501), the lower pressure plate (502) and the adjusting pad (503); An upper clamping plate (701) is fixedly installed in the middle of the bottom end face of the upper mold base (7), and an upper pressure plate (702) is fixedly installed at the bottom of the upper clamping plate (701); an outer diameter concave knife (703) is fixedly installed inside the upper pressure plate (702) at the bottom of the upper clamping plate (701), and the outer diameter concave knife (703) is rectangular tubular in shape; an inner hole cutter (704) is fixedly installed inside the upper clamping plate (701), and a top core (706) is slidably connected to the lower end of the outer side of the inner hole cutter (704), and an annular limiting block (707) is provided at the upper end of the top core (706), and a limiting cylinder (705) fixed to the bottom end face of the upper clamping plate (701) is slidably connected to the outer side of the annular limiting block (707), and a spring is sleeved on the top of the annular limiting block (707) outside the inner hole cutter (704), and the inner hole cutter (704) and the tubular outer diameter cutter (5012) are on the same axis.

2. The high-precision punching device as described in claim 1, characterized in that: The first guide post (508) and the second guide post (6) are both octagonal prisms, and the first guide post (508) has a first rectangular groove (509) on each of the four end faces of the front, back, left and right. Each first rectangular groove (509) is rotatably connected to a cylindrical roller A (5010), and the cylindrical roller A (5010) is rotatably connected to the inner side of the first bushing (507). Each first guide post (508) is fitted with a spring on the outside.

3. The high-precision punching device as described in claim 1, characterized in that: The second guide post (6) has a second rectangular groove (602) on each of its four end faces (front, back, left and right). Each second rectangular groove (602) is rotatably connected to a cylindrical roller B (603). The cylindrical roller B (603) is rotatably connected to the inner side of the second bushing (601). The four second bushings (601) are respectively fixedly embedded in the four corners of the upper mold base (7).

4. The high-precision punching device as described in claim 1, characterized in that: It also includes a locking component (8), which is disposed on the rear end face of the limiting plate (401). The locking component (8) includes a locking slide (801), a locking slider (802), a T-shaped pull rod (803), and a plug strip (804). The locking slide (801) is fixedly installed on the rear end face of the limiting plate (401), and the locking slider (802) is slidably connected inside the locking slide (801). The upper end of the locking slider (802) is provided with a T-shaped pull rod (803) that penetrates the top of the locking slide (801), and a spring is sleeved on the outside of the T-shaped pull rod (803) inside the locking slide (801). The bottom of the locking slider (802) is fixedly connected with a plug strip (804) that penetrates the bottom of the locking slide (801), and the front edge of the lower end of the plug strip (804) is chamfered.

5. The high-precision punching device as described in claim 4, characterized in that: When the locking component (8) is in the locked state, the lower end of the plug bar (804) is plugged into the rectangular plug interface opened on the upper surface of the plug plate (504).

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