Quick-change structure suitable for punching die

Abstract

The utility model relates to a kind of applicable to punching die quick-change structure, including the upper die plate in the inside of punching die, the inside of the upper die plate is equipped with punch base, the inside of the punch base is detachably equipped with punch rod die sleeve, the side wall of the upper die plate and punch base is equipped with the notch for preventing mutual rotation, the inside of the punch rod die sleeve is detachably installed with different specifications of punching punch rod;Compared with the traditional punching die, the utility model can effectively improve the efficiency of replacing punching punch rod.The whole process of disassembling and assembling punching punch rod and punch rod die sleeve only needs a few minutes, and the die changing efficiency is improved several times compared with the traditional disassembly of upper die fixed plate, several cylindrical head screws and punching punch rod.

Description

Technical Field

[0001] This utility model relates to the field of punching die technology, and specifically to a quick-change structure suitable for punching dies. Background Technology

[0002] In the punching process, frequent changes of punching dies are often required to meet different product needs. Traditional methods of installing and disassembling punching dies are cumbersome, typically requiring multiple tools and bolts to secure the dies to the stamping equipment. Changing dies consumes considerable time in loosening and tightening bolts, demands high installation precision, and may require repeated adjustments due to positional deviations, leading to prolonged equipment downtime and severely impacting production efficiency. Furthermore, the complex installation structure increases the workload of operators and raises production costs. Therefore, developing a quick-change structure that enables rapid die replacement, precise positioning, and easy operation is of significant practical importance.

[0003] However, current punching dies have certain limitations when replacing punching punches: 1. Low die replacement efficiency. When replacing a punching punch, the three fixing screws of the upper die fixing plate must first be removed, the upper die fixing plate and the punch must be removed together, then a new punch must be installed, and then the upper die fixing plate and the punch must be fastened to the upper die plate with three screws. The entire process of disassembling and assembling the die takes about 20 minutes. 2. High labor intensity. Disassembling and assembling the die requires lifting the upper die fixing plate and the punch together, which is physically demanding; at the same time, removing and installing the three fastening screws upwards is also inconvenient and requires considerable effort. Summary of the Invention

[0004] This invention addresses the problems encountered when changing punches in punching dies, and proposes a quick-change structure suitable for punching dies. Compared to traditional punching dies, this solution effectively improves the efficiency of changing punch rods. The entire process of disassembling and assembling the punch rod and punch rod sleeve takes only a few minutes, which is several times more efficient than the traditional method of removing the upper die fixing plate, several cylindrical head screws, and the punch rod.

[0005] The purpose of this invention is achieved through the following technical solution: a quick-change structure for punching dies, including an upper template inside the punching die, a punch base inside the upper template, a punch rod sleeve detachably inside the punch base, and cuts on the side walls of both the upper template and the punch base to prevent mutual rotation. Punching punch rods of different specifications can be detachably installed inside the punch rod sleeve.

[0006] Preferably, the punching punch includes a columnar punching portion and a mounting portion. The mounting portion is located at one end of the punching portion and is composed of several columnar bosses with different diameters. The punching portion is used to punch the workpiece.

[0007] Preferably, the center of the punch rod sleeve is provided with a first stepped through hole that matches the mounting part of the punching punch rod, and the punching punch rod is coaxial after being installed in the punch rod sleeve.

[0008] Preferably, the side wall of the punch rod sleeve is also provided with a sleeve boss, the sleeve boss is provided with an external thread, and the punch rod sleeve is detachably connected to the inside of the punch base through the external thread.

[0009] Preferably, the end of the punch rod sleeve is also provided with a polygonal plane for easy tightening or loosening with a wrench.

[0010] Preferably, the punch base is a stepped cylinder, and the center of the punch base is provided with a second stepped through hole that is adapted to the punch rod sleeve and the sleeve boss. The second stepped through hole is connected to the external thread of the sleeve boss through an internal thread.

[0011] Preferably, the upper template is rectangular and has a plurality of evenly arranged threaded holes, which are used to connect with the slider inside the punching die.

[0012] Preferably, the center cut of the upper template to prevent mutual rotation is a D-shaped countersunk hole. The D-shaped countersunk hole is used to center and position the punch base and can prevent rotation when assembling or disassembling the punch rod sleeve.

[0013] The punching die includes an upper die assembly and a lower die assembly. The lower die assembly includes a worktable, a worktable panel, a lower template, a lower die pressure plate, a lower die pad, a lower die pressure ring, and a pull plate support column. The worktable has a worktable panel inside, and the lower template is provided on the worktable panel. Several lower die pressure plates are detachably connected to the surface of the lower template by nuts and bolts. A lower die pad is provided between the several lower die pressure plates. The lower die pressure ring and the pull plate support column are provided above the lower die pad. This arrangement is to enable the punching die to complete the punching process on the workpiece normally.

[0014] The upper mold assembly includes a slider, an upper template, a punch base, a punch rod sleeve, and a punching punch rod. The upper template is located below the slider, and the upper template contains the punch base, the punch rod sleeve, and the punching punch rod. This arrangement is to enable a detachable connection between the upper template, the punch base, the punch rod sleeve, and the punching punch rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. Compared to traditional punching dies, it can effectively improve the efficiency of changing punching punch rods. The entire process of disassembling and assembling the punching punch rod and punch rod sleeve only takes a few minutes. Compared to the traditional method of removing the upper die fixing plate, several cylindrical head screws and punching punch rod, the die changing efficiency is increased several times. 2. Effectively reduces the labor intensity of replacing parts. Since only a wrench is needed for screwing in and out, there's no need to remove and install the three screws on the upper mold fixing plate, thus reducing workload. The mold weight is reduced from 15kg to 7kg, making it easier to lift. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the existing punching die; Figure 2 This is a partial cross-sectional view of the present invention; Figure 3 This is a cross-sectional view of the present invention; Figure 4 This is the front view of the template of this utility model; Figure 5 This is a cross-sectional view of the template of this utility model; Figure 6 This is the front view of the punch rod sleeve of this utility model; Figure 7 This is a cross-sectional view of the punch rod sleeve of this utility model; Figure 8 This is a front view of the punch base of this utility model; Figure 9 This is a cross-sectional view of the punch base of this utility model; Figure 10 This is a perspective view of the template of this utility model.

[0017] The markings in the diagram are: 1. Upper die plate; 11. Threaded hole; 12. D-shaped countersunk hole; 2. Punch base; 21. Second step through hole; 3. Punch rod sleeve; 31. First step through hole; 32. Sleeve boss; 33. Polygonal plane; 4. Punching punch rod; 41. Punching part; 42. Mounting part; 5. Upper die assembly; 6. Lower die assembly; 61. Workbench plate; 62. Workbench plate insert; 63. Lower die plate; 64. Nut; 65. Bolt; 66. Lower die pressure plate; 67. Lower die pad; 68. Lower die pressure ring; 69. Pull plate support column; 7. Slider; 8. Upper die fixing plate; 9. Upper die plate insert; 10. Cylindrical head screw. Detailed Implementation

[0018] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings: like Figure 1As shown, the punching die before improvement includes an upper die assembly 5 and a lower die assembly 6. The lower die assembly 6 includes a worktable 61, a worktable panel 62, a lower die template 63, a lower die pressure plate 66, a lower die pad 67, a lower die pressure ring 68, and a pull plate support column 69. The worktable 61 has a worktable panel 62 inside, and the lower die template 63 is provided on the worktable panel 62. Several lower die pressure plates 66 are detachably connected to the surface of the lower die template 63 by nuts 64 and bolts 65. A lower die pad 67 is provided between the several lower die pressure plates 66. The lower die pressure ring 68 and the pull plate support column 69 are provided above the lower die pad 67.

[0019] The upper mold assembly 5 includes a slider 7, an upper template 1, an upper mold fixing plate 8, an upper template insert 9, and a punching punch rod 4. The upper template 1 is located below the slider 7, and the upper template insert 9 is located inside the upper template 1. Several upper mold fixing plates 8 are detachably connected to the lower part of the upper template insert 9 by several cylindrical head screws. The punching punch rod 4 is installed in the gap between the several upper mold fixing plates 8.

[0020] Using this common punching die has certain limitations: First, the die changing efficiency is low: when it is necessary to replace the punching punch rod 4, the three cylindrical head screws 10 on the upper die fixing plate 8 must first be removed, and the upper die fixing plate 8 and the punching punch rod 4 must be removed together. Then, a punching punch rod 4 of a different specification must be installed, and the upper die fixing plate 8 and the punching punch rod 4 must be fastened to the upper die plate 1 with three cylindrical head screws 10. The entire process of disassembling and assembling the die takes a long time. Second, the labor intensity is high: disassembling and assembling the die requires lifting the upper die fixing plate 8 and the punching punch rod 4 together, which is physically demanding; at the same time, it is also inconvenient and time-consuming to remove and install the three cylindrical head screws 10 upwards.

[0021] like Figure 2 and Figure 3 As shown, a quick-change structure for punching dies is provided. The punching die includes an upper die assembly 5 and a lower die assembly 6. The lower die assembly 6 includes a worktable 61, a worktable panel 62, a lower die template 63, a lower die pressure plate 66, a lower die pad 67, a lower die pressure ring 68, and a pull plate support column 69. The worktable 61 has a worktable panel 62 inside. The lower die template 63 is provided on the worktable panel 62. Several lower die pressure plates 66 are detachably connected to the surface of the lower die template 63 by nuts 64 and bolts 65. A lower die pad 67 is provided between the several lower die pressure plates 66. The lower die pressure ring 68 and the pull plate support column 69 are provided above the lower die pad 67.

[0022] The upper mold assembly 5 includes a slider 7, an upper template 1, a punch base 2, a punch rod sleeve 3, and a punching punch rod 4. The upper template 1 is located below the slider 7. The upper template 1 is rectangular and has a plurality of evenly arranged threaded holes 11, which are used to connect with the slider 7 inside the punching die.

[0023] Please continue to refer to this. Figure 4 , Figure 5 , Figure 8 and Figure 9 In this embodiment, the upper template 1 has a punch base 2 inside, and both the upper template 1 and the punch base 2 have sidewalls with cuts to prevent mutual rotation. The center cut of the upper template 1 to prevent mutual rotation is a D-shaped countersunk hole 12. The upper template 1 serves as the top reference part of the mold, and the center of the upper template 1 has a stepped through hole adapted to the punch base 2. One side of the upper template 1 is machined to remove part of the material inside, forming a single-sided D-shaped asymmetrical interface. The D-shaped countersunk hole 12 is used to center and position the punch base 2, and the D-shaped countersunk hole 12 can prevent rotation when assembling or disassembling the punch rod sleeve 3.

[0024] like Figures 6 to 9 As shown, the punch base 2 has a detachable punch rod sleeve 3 inside. The side wall of the punch rod sleeve 3 is also provided with a sleeve boss 32, which has external threads. The punch rod sleeve 3 is detachably connected to the inside of the punch base 2 through these external threads. The inner wall of the punch base 2 has a positioning groove and internal threads for fixing the punch rod sleeve 3, achieving coaxial positioning through rotation.

[0025] Specifically, the punch base 2 is a stepped cylinder, and the center of the punch base 2 is provided with a second stepped through hole 21 that is adapted to the punch rod sleeve 3 and the sleeve boss 32. The second stepped through hole 21 is connected to the external thread of the sleeve boss 32 through an internal thread. The end of the punch rod sleeve 3 is also provided with a polygonal plane 33 for easy tightening or loosening with a wrench.

[0026] Please continue to refer to this. Figure 7 and Figure 10 The punch sleeve 3 can be detachably fitted with punches 4 of different specifications. Each punch 4 includes a columnar punching portion 41 and a mounting portion 42. The mounting portion 42 is located at one end of the punching portion 41 and is composed of several columnar bosses of different diameters. The punching portion 41 is used to punch the workpiece. The center of the punch sleeve 3 has a first stepped through hole 31 that matches the mounting portion 42 of the punch 4.

[0027] With this configuration, the punching punch 4 is installed in the first stepped through hole 31 inside the punch rod sleeve 3, and is in a coaxial state. One end of the punch rod sleeve 3 is a positioning section for centering with the punch base 2. The outer wall of the punch rod sleeve 3 is provided with external threads, and the punch rod sleeve 3 and the punch base 2 are detachably connected by screwing.

[0028] The installation process begins by installing the punch base 2 into the upper template 1 using the stepped through hole. Then, the upper template 1 is fixed to the punch press slide using fastening screws as a reference. Next, a specific wrench is used to screw the externally threaded punch rod sleeve 3 and the installed punching punch rod 4 clockwise into the punch base 2. For disassembly, simply unscrew the punch rod sleeve 3 counterclockwise for replacement.

[0029] Working principle and usage of this utility model: When the punching punch rod 4 needs to be replaced, simply use a wrench to unscrew the external thread of the punch rod sleeve 3 from the internal thread of the punch base 2, then wedge the punching punch rod 4 into the punch rod sleeve 3, and finally screw the punching punch rod 4 and the punch rod sleeve 3 together into the punch base 2 to complete the installation. During the entire die replacement process, no lifting is required, and compared to traditional punching dies, it is also unnecessary to remove the upper die fixing plate 8 and the three cylindrical head screws 10 of the upper die fixing plate 8.

[0030] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A quick-change structure for punching dies, comprising an upper template (1) inside the punching die, characterized in that, The upper template (1) is provided with a punch base (2) inside. The punch base (2) is provided with a punch rod sleeve (3) inside. The side walls of the upper template (1) and the punch base (2) are provided with cuts to prevent mutual rotation. The punch rod sleeve (3) is provided with punching punch rods (4) of different specifications inside.

2. The quick-change structure for punching dies according to claim 1, characterized in that, The punching punch rod (4) includes a columnar punching part (41) and a mounting part (42). The mounting part (42) is located at one end of the punching part (41) and is composed of several columnar bosses with different diameters. The punching part (41) is used to punch the workpiece.

3. The quick-change structure for punching dies according to claim 2, characterized in that, The center of the punch rod sleeve (3) is provided with a first stepped through hole (31) that is compatible with the mounting part (42) of the punching punch rod (4). The punching punch rod (4) is coaxial after being installed in the punch rod sleeve (3).

4. The quick-change structure for punching dies according to claim 3, characterized in that, The side wall of the punch rod sleeve (3) is also provided with a sleeve boss (32), and the sleeve boss (32) is provided with an external thread. The punch rod sleeve (3) is detachably connected to the inside of the punch base (2) through the external thread.

5. The quick-change structure for punching dies according to claim 4, characterized in that, The end of the punch rod sleeve (3) is also provided with a polygonal plane (33) for easy tightening or loosening with a wrench.

6. The quick-change structure for punching dies according to claim 5, characterized in that, The punch base (2) is a cylindrical body with steps. The punch base (2) has a second stepped through hole (21) at its center that is compatible with the punch rod sleeve (3) and the sleeve boss (32). The second stepped through hole (21) is connected to the sleeve boss (32) through an internal thread.

7. The quick-change structure for punching dies according to claim 6, characterized in that, The upper template (1) is rectangular and has several evenly arranged threaded holes (11). The threaded holes (11) are used to connect with the slider (7) inside the punching die.

8. The quick-change structure for punching dies according to claim 7, characterized in that, The center cut of the upper template (1) to prevent mutual rotation is a D-shaped countersunk hole (12). The D-shaped countersunk hole (12) is used to center and position the punch base (2) and can prevent rotation when the punch rod sleeve (3) is disassembled or assembled.

9. The quick-change structure for punching dies according to claim 8, characterized in that, The punching die includes an upper die assembly (5) and a lower die assembly (6). The lower die assembly (6) includes a worktable plate (61), a worktable plate insert (62), a lower die template (63), a lower die pressure plate (66), a lower die pad (67), a lower die pressure ring (68), and a pull plate support column (69). The worktable plate (61) is provided with a worktable plate insert (62) inside. The worktable plate insert (62) is provided with a lower die template (63). The surface of the lower die template (63) is detachably connected to several lower die pressure plates (66) by nuts (64) and bolts (65). A lower die pad (67) is provided between several lower die pressure plates (66). A lower die pressure ring (68) and a pull plate support column (69) are provided above the lower die pad (67).

10. The quick-change structure for punching dies according to claim 9, characterized in that, The upper mold assembly (5) includes a slider (7), an upper template (1), a punch base (2), a punch rod sleeve (3), and a punching punch rod (4). The upper template (1) is located below the slider (7), and the upper template (1) contains the punch base (2), the punch rod sleeve (3), and the punching punch rod (4).

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