Die spring for a punch press

Abstract

The present application provides a kind of die spring for punch press, belong to the technical field of machining.The present application is provided with auxiliary clamping assembly by being set with adjusting ring in the one end of columnar clamping rod, so that the two ends of punch can be clamped by columnar clamping rod and auxiliary clamping assembly respectively when punch is installed in columnar clamping rod, effectively prevent the problem that only one end of punch is clamped and leads to inclination in stamping process, ensure the accuracy of stamping, in addition, auxiliary clamping assembly includes fixed sleeve, rotating sleeve and adjusting column, rotating sleeve is rotatably installed in fixed sleeve, adjusting groove is arranged in arc shape on rotating sleeve and two ends are located at the outside and inside of rotating sleeve respectively, and the end of adjusting column extends into adjusting groove, the center of rotating sleeve can be approached or spread out to the outside by rotating rotating sleeve, the clamping or loosening of punch is realized, and the clamping requirement of punch with different diameters can be met, and the structure flexibility is higher, convenient production and processing.

Description

Technical Field

[0001] This invention relates to the field of machining technology, specifically to a die spring for a punch press. Background Technology

[0002] Punch presses are commonly used equipment in the machining industry, enabling rapid punching and forming processes on sheet metal with high efficiency and ease of operation. Existing punch presses include a punching head, a punch, and a fixture for mounting the punch onto the punching head. For cylindrical punches, the industry typically uses die springs for clamping.

[0003] Currently, existing mold springs on the market, such as the CNC punch press mold chuck clamping structure disclosed in patent CN201969782U, involve a gap on the top platform of the striking head, threaded holes on both sides of the gap, and locking screws inside the threaded holes. The top of the column on the lower side of the striking head has a tapered shape, wider at the top and narrower at the bottom. A lower washer is fitted onto the outer side of the tapered shape, with the lower washer resting on the lower end of the screw. The middle of the lower washer has a tapered hole, wider at the top and narrower at the bottom, which matches the tapered shape on the lower side of the striking head. The lower washer is fitted with a spring that fits onto the lower column of the striking head. The upper end of the spring rests on the lower side of the lower washer, and the lower end rests on the upper side of the stop ring. The stop ring is locked to the lower end of the lower column of the striking head. By tightening the locking screw, the operator moves the lower washer on the striking head under the action of the locking screw and the spring. The tapered hole of the lower washer engages with the tapered section on the column of the striking head, thereby expanding or contracting the inner diameter of the tapered end of the striking head, thus clamping or releasing the punch. However, because the inner diameter of the striking head is achieved through the engagement of the tapered hole and the tapered section, and because the expansion or contraction of the inner diameter of the striking head is achieved through the gap on the top platform of the striking head, the inner diameter of the striking head has a smooth variable cross-section arrangement in its axial direction. This results in a line contact between the striking head and the punch when clamping the punch, with a small contact area, and the punch is prone to tilting on the striking head, thus affecting the machining accuracy. Summary of the Invention

[0004] To address the aforementioned problems in the existing technology, the present invention aims to provide a die spring for a punch press, wherein an auxiliary clamping component is provided at one end of a columnar clamping rod. The auxiliary clamping component clamps the other end of the punch that extends into the columnar clamping rod, so that both ends of the punch are clamped by the columnar clamping rod and the auxiliary clamping component respectively, thereby achieving positioning of both ends of the punch, effectively preventing the problem of the punch tilting during processing, ensuring processing accuracy, and facilitating production.

[0005] The specific technical solution is as follows:

[0006] A die spring for a punch press, characterized by the following features:

[0007] The columnar clamp is a hollow columnar structure. An integrally arranged adjusting ring is provided at one end of the columnar clamp. Furthermore, a number of spaced strip gaps are opened along the axial direction on the side wall of the end of the columnar clamp with the adjusting ring, and each strip gap passes through the adjusting ring. At the same time, a number of adjusting holes are opened along the axial direction on the adjusting ring. The outer wall of the end of the columnar clamp with the adjusting ring is tapered, and the end of the columnar clamp closer to the adjusting ring is the larger end.

[0008] The movable ring has a central hole, which is a conical hole. The movable ring is sleeved on the outside of the end of the columnar clamp rod with a conical surface, and the wall of the conical hole fits with the conical surface of the columnar clamp rod. At the same time, an adjusting screw is provided in the adjusting hole, and the end of the adjusting screw extends out of the adjusting hole and abuts against the movable ring.

[0009] The positioning sleeve is fixedly fitted onto the end of the columnar clamping rod that is away from the adjusting ring.

[0010] A telescopic spring is sleeved on the outside of a cylindrical clamping rod, with its two ends abutting against a positioning sleeve and a moving ring, respectively.

[0011] The auxiliary clamping assembly includes a fixed sleeve, an adjusting column, a rotating sleeve, and a connecting column. The fixed sleeve is fixedly installed on the end of the positioning sleeve away from the telescopic spring. The fixed sleeve has an inner cavity in which a rotating sleeve arranged coaxially with the columnar clamping rod is rotatably installed. The rotating sleeve has several adjusting grooves arranged in a ring around the axis of the columnar clamping rod. Each adjusting groove is arranged in an arc shape, and the two ends of each adjusting groove are located on the outer and inner sides of the rotating sleeve, respectively. An adjusting column that slides along the adjusting groove is installed in each adjusting groove along the axial direction of the columnar clamping rod. A connecting column is provided on the side of the fixed sleeve away from the positioning sleeve and seals the inner cavity of the fixed sleeve. The connecting column is connected to the punch head of the punch press. At the same time, an actuating arm arranged along the axial direction of the columnar clamping rod and extending to the outside of the fixed sleeve is provided on the outer edge of the rotating sleeve.

[0012] The aforementioned punch press die spring includes a positioning sleeve comprising a pressure sleeve and a locking sleeve. The pressure sleeve is slidably mounted on a columnar clamping rod and abuts against a telescopic spring. The locking sleeve is located on the side of the pressure sleeve away from the telescopic spring and is threadedly connected to the columnar clamping rod.

[0013] The aforementioned die spring for a punch press includes a first positioning hole on the pressure sleeve and a second positioning hole on the locking sleeve, wherein the first positioning hole and the second positioning hole are locked together by screws.

[0014] In the aforementioned punch press die spring, a flexible rubber tube is provided in the adjusting ring and in each of the strip gaps.

[0015] The aforementioned punch press die spring further includes an outer cover, which is cylindrical and fitted over the telescopic spring.

[0016] In the aforementioned punch press die spring, an annular groove is formed on the outer edge of the moving ring and on the side near the positioning sleeve. The opening of the outer cover near the moving ring is folded inward to form a retaining edge. When the outer cover is fitted over the telescopic spring, the retaining edge is embedded in the annular groove and pressed against the telescopic spring on the moving ring.

[0017] In the aforementioned punch press die spring, the fixed sleeve is arranged in a barrel shape, one end of the bottom of the fixed sleeve is threadedly connected to the side of the locking sleeve away from the pressure sleeve, the connecting column is threadedly installed at one end of the barrel opening of the fixed sleeve, and a turning groove is opened on the side wall of the fixed sleeve, and the turning arm extends from the turning groove to the outside of the fixed sleeve.

[0018] The aforementioned punch press die spring includes a rotating sleeve comprising a top actuating plate, a bottom actuating plate, and a turntable. The top and bottom actuating plates are arranged coaxially in upper and lower layers. Both the top and bottom actuating plates are provided with adjustment grooves, which are aligned axially with the columnar clamping rod. The adjusting rod is cylindrical, with coaxial rotating shafts protruding from both ends. The adjusting rod is installed between the top and bottom actuating plates, and the two rotating shafts extend into the two aligned adjustment grooves on the top and bottom actuating plates, respectively. The turntable is stacked on the top or bottom actuating plate and fixedly connected, with one end of the actuating arm fixedly connected to the side edge of the turntable.

[0019] The aforementioned punch press die spring further includes a limiting plate, which is disposed between the bottom of the rotating sleeve and the fixed sleeve, and is coaxially fixed to the bottom of the fixed sleeve. The limiting plate has several limiting grooves arranged in a circular array, with each limiting groove corresponding to an adjustment groove. Each limiting groove is arranged radially along the columnar clamping rod, and the end of the rotating shaft extending into the adjustment groove also extends into the corresponding limiting groove.

[0020] In the aforementioned punch press die spring, a mating plate is provided circumferentially on the outer wall of the fixed sleeve at the opening of the actuating groove, and a first tooth block is provided on the mating plate. A second tooth block that meshes with the first tooth block is provided on one end of the actuating arm extending outside the fixed sleeve. Furthermore, an adjusting spring is provided between the connecting column and the rotating sleeve.

[0021] The positive effects of the above technical solution are:

[0022] The aforementioned punch press die spring features an auxiliary clamping assembly located at the end of a columnar clamping rod opposite to the adjusting ring. This auxiliary clamping assembly includes a fixed sleeve, a rotating sleeve, and an adjusting column. The rotating sleeve has arc-shaped adjusting grooves at its two ends, one on the outer side and the other on the inner side. The end of the adjusting column slides within these grooves. When the rotating sleeve rotates, the adjusting column moves towards or away from the axis of rotation under the guidance of the adjusting grooves. This allows one end of the punch to be clamped by the end of the columnar clamping rod with the adjusting ring, while the other end is clamped by the auxiliary clamping assembly. This clamping of both ends of the punch effectively prevents tilting during punch processing, ensuring machining accuracy. Furthermore, the rotating sleeve allows for clamping or releasing the punch, and the assembly can accommodate punches of different diameters. The design offers greater structural flexibility, better adaptability, and easier operation, facilitating production and processing. Attached Figure Description

[0023] Figure 1 This is a structural diagram of an embodiment of a punch press die spring according to the present invention;

[0024] Figure 2 This is a structural diagram of the fixing sleeve according to a preferred embodiment of the present invention;

[0025] Figure 3 This is an exploded view of the rotating sleeve according to a preferred embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the installation of the turntable and the top actuating disk according to a preferred embodiment of the present invention;

[0027] Figure 5 This is a cross-sectional view of the top or bottom dial of a preferred embodiment of the present invention.

[0028] Figure 6 This is a structural diagram of a limiting disk according to a preferred embodiment of the present invention.

[0029] In the attached diagram: 1. Columnar clamping rod; 11. Adjusting ring; 12. Strip gap; 111. Adjusting hole; 112. Adjusting screw; 121. Flexible rubber tube; 2. Moving ring; 21. Center hole; 22. Annular groove; 3. Positioning sleeve; 31. Pressure sleeve; 32. Locking sleeve; 311. First positioning hole; 321. Second positioning hole; 4. Telescopic spring; 5. Auxiliary clamping assembly; 51. Fixed sleeve; 52. Adjusting column; 53. Rotating sleeve; 54. Connecting column; 55. Actuating arm; 56. Limiting plate; 57. Adjusting spring; 511. Actuating groove; 512. Mating plate; 521. Rotating shaft; 531. Top actuating plate; 532. Bottom actuating plate; 533. Turntable; 551. Second toothed block; 561. Limiting groove; 5121. First toothed block; 5311. Adjusting groove; 6. Outer cover; 61. Clamping edge. Implementation

[0030] To make the technical means, creative features, objectives, and effects of this invention easier to understand, the following embodiments are provided in conjunction with the appendix. Figure 1 To be continued Figure 6 The technical solutions provided by this invention are described in detail, but the following content is not intended to limit this invention.

[0031] Figure 1 This is a structural diagram of an embodiment of a die spring for a punch press according to the present invention. Figure 1 As shown, the punch die spring provided in this embodiment includes: a columnar clamping rod 1, a moving ring 2, a positioning sleeve 3, a telescopic spring 4, and an auxiliary clamping assembly 5. The auxiliary clamping assembly 5 is installed at one end of the columnar clamping rod 1, so that one end of the punch installed in the columnar clamping rod 1 can be clamped by the columnar chuck, and the other end can be clamped by the auxiliary clamping assembly 5. This achieves clamping of both ends of the punch, effectively preventing the problem of tilting that occurs when only one end is clamped in the existing structure, improving the accuracy of stamping, and facilitating stamping processing.

[0032] Specifically, the columnar clamping rod 1 is designed as a hollow columnar structure, providing a condition for the punch to be inserted into and clamped by the columnar clamping rod 1. At this time, an integrally arranged adjusting ring 11 is provided at one end of the columnar clamping rod 1. Furthermore, several spaced strip-shaped gaps 12 are formed along the axial direction on the side wall of the end of the columnar clamping rod 1 with the adjusting ring 11, and each strip-shaped gap 12 penetrates the adjusting ring 11. This allows for adjustment of the inner diameter of the end of the columnar clamping rod 1 with the adjusting ring 11 by changing the size of the strip-shaped gaps 12, thereby achieving the clamping or loosening of the punch within the columnar clamping rod 1. Simultaneously, several adjusting holes 111 are formed along the axial direction on the adjusting ring 11, facilitating subsequent fitting and providing an installation base for the columnar clamping moving ring 2. In addition, the outer wall of the end of the columnar clamping rod 1 with the adjusting ring 11 is arranged in a conical shape, so that the cross section of the outer wall of the adjusting ring 11 is arranged in a variable cross section in its axial direction. Furthermore, the end of the columnar clamping rod 1 near the adjusting ring 11 is set as the large end, that is, the outer diameter of this end is larger. This provides the conditions for compressing the strip gap 12 when the moving ring 2 is moved toward the adjusting ring 11, thereby reducing the inner diameter of the end of the columnar clamping rod 1 with the adjusting ring 11 and clamping the punch.

[0033] Specifically, the moving ring 2 is an annular plate with a central hole 21. The central hole 21 is a conical hole, and the moving ring 2 is fitted onto the end of the cylindrical clamping rod 1 with the conical surface, allowing the moving ring 2 to slide axially along the cylindrical clamping rod 1. Simultaneously, the wall of the conical hole fits against the conical surface of the cylindrical clamping rod 1, increasing the contact area between the moving ring 2 and the outer wall of the cylindrical clamping rod 1, resulting in more stable and reliable adjustment. Furthermore, an adjusting screw 112 is provided within the adjusting hole 111 of the adjusting ring 11. The end of the adjusting screw 112 extends out of the adjusting hole 111 and abuts against the moving ring 2. By turning the adjusting screw 112, the distance by which it extends out of the adjusting hole 111 can be controlled, thereby controlling the gap between the moving ring 2 and the adjusting ring 11, and thus controlling the position of the moving ring 2 on the cylindrical clamping rod 1, meeting the clamping and loosening requirements of the cylindrical clamping rod 1.

[0034] Specifically, the positioning sleeve 3 and the fixing sleeve 51 are set at the end of the columnar clamping rod 1 away from the adjusting ring 11. That is, the positioning sleeve 3 forms a limiting structure on the end of the columnar clamping rod 1 away from the adjusting ring 11, providing a base for the subsequent installation of the telescopic spring 4.

[0035] Specifically, the telescopic spring 4 is sleeved on the outside of the cylindrical clamping rod 1, with its two ends abutting against the positioning sleeve 3 and the moving ring 2 respectively. The telescopic spring 4 provides a thrust to the moving sleeve towards the adjusting ring 11. Within the allowable stroke range of the adjusting screw 112, the telescopic spring 4 moves the moving ring 2 towards the adjusting ring 11, reducing the strip interval and thus reducing the inner diameter of the cylindrical clamping rod 1, thereby clamping the punch. It is worth noting that when the adjusting screw 112 pushes the moving ring 2 towards the end away from the adjusting ring 11, the telescopic spring 4 is compressed, and the central hole 21 of the moving ring 2 does not press against the outer wall of the cylindrical clamping rod 1. The cylindrical clamping rod 1 automatically resets, thus releasing the punch.

[0036] Specifically, the auxiliary clamping assembly 5, installed on the end of the columnar clamping rod 1 away from the adjusting ring 11, includes a fixed sleeve 51, an adjusting column 52, a rotating sleeve 53, and a connecting column 54. In this case, the fixed sleeve 51 is fixedly installed on the end of the positioning sleeve 3 away from the telescopic spring 4, achieving a stable connection between the auxiliary clamping assembly 5 and the columnar clamping rod 1. Furthermore, the fixed sleeve 51 has an inner cavity in which a rotating sleeve 53, coaxially arranged with the columnar clamping rod 1, is rotatably installed, allowing the rotating sleeve 53 to rotate relative to the fixed sleeve 51 within the fixed sleeve 51. The rotating sleeve 53 has several adjusting grooves 5311 arranged in a circular array around the axis of the columnar clamping rod 1, and each adjusting groove 5311 is arc-shaped, achieving a smooth transition of the groove wall and providing conditions for subsequent movement of the adjusting column 52 without jamming. Furthermore, the two ends of each adjusting groove 5311 are located on the outer and inner sides of the rotating sleeve 53, respectively, meaning that the distance from each adjusting groove 5311 to the center of the rotating sleeve 53 is different. At this time, an adjusting column 52 is installed in each adjusting groove 5311 along the axial direction of the columnar clamping rod 1, sliding along the adjusting groove 5311. This allows the adjusting column 52 to slide within the adjusting groove 5311 as the rotating sleeve 53 rotates. When the adjusting column 52 moves from the outer side of the adjusting groove 5311 towards the inner side of the rotating sleeve 53, it moves closer to the center of the rotating sleeve 53, thereby clamping the end of the punch extending into the rotating sleeve 53 and preventing the end of the punch from shaking or tilting. Conversely, when the adjusting column 52 moves from the inner side of the adjusting groove 5311 towards the outer side of the rotating sleeve 53, it spreads outwards towards the outer side of the rotating sleeve 53, releasing the end of the punch extending into the rotating sleeve 53 and facilitating the clamping of the punch. In addition, a connecting post 54 is provided on the side of the fixed sleeve 51 opposite to the positioning sleeve 3. At this time, the inner cavity of the fixed sleeve 51 is sealed by the connecting post 54, preventing the rotating sleeve 53 from coming out of the fixed sleeve 51. At the same time, the connecting post 54 is connected to the punch head of the punch press, that is, the mold spring is installed on the punch head of the punch press through the connecting post 54, which meets the clamping requirements. Meanwhile, a toggle arm 55 is provided on the outer edge of the rotating sleeve 53, which is arranged along the axial direction of the columnar clamping rod 1 and extends to the outside of the fixed sleeve 51. This allows the operator to rotate the rotating sleeve 53 inside the fixed sleeve 51 by toggle the toggle arm 55, thereby controlling the clamping or loosening of the punch end, making the operation more convenient.

[0037] More specifically, the positioning sleeve 3 includes a pressure sleeve 31 and a locking sleeve 32. The pressure sleeve 31 is slidably fitted onto the cylindrical clamping rod 1 and abuts against the telescopic spring 4, providing a base for the telescopic spring 4. Simultaneously, the locking sleeve 32 is positioned on the side of the pressure sleeve 31 away from the telescopic spring 4 and is threadedly connected to the cylindrical clamping rod 1. The connection between the locking sleeve 32 and the cylindrical clamping rod 1 can be achieved simply by rotating the locking sleeve 32, and the locking sleeve 32 provides limiting support for the pressure sleeve 31. It is worth noting that because the telescopic spring 4 needs to provide sufficient force to clamp the cylindrical clamping rod 1, it is a relatively thick spring, requiring a large force during deformation. Therefore, when installing the telescopic spring 4 and the positioning sleeve 3, the pressure of the telescopic spring 4 on the positioning sleeve 3 is relatively large. Directly turning the positioning sleeve 3 requires sufficiently large torque, making assembly extremely inconvenient. The split positioning sleeve 3 allows for easy operation by first pressing down the pressure sleeve 31 with a tool before turning the locking sleeve 32.

[0038] More specifically, a first positioning hole 311 is provided on the pressure sleeve 31, and a second positioning hole 321 is provided on the locking sleeve 32. After the locking sleeve 32 is installed, the first positioning hole 311 and the second positioning hole 321 are locked with screws. That is, after the assembly is completed, the positioning sleeve 3 is formed into an integral structure through the first positioning hole 311 and the second positioning hole 321, thereby improving the overall structural strength.

[0039] More specifically, a flexible tubing 121, such as a rubber tube, is provided on the adjusting ring 11 and within each strip gap 12. This tubing can seal the strip gap 12 to prevent dust and other contaminants from entering the strip gap 12. In addition, it can adapt to the size changes of the strip gap 12, making the structural design more reasonable.

[0040] More specifically, an outer cover 6 is also fitted over the telescopic spring 4. At this time, the outer cover 6 is cylindrical, which protects the telescopic spring 4 and provides higher safety assurance.

[0041] More specifically, an annular groove 22 is formed on the outer edge of the moving ring 2, near the positioning sleeve 3. At the same time, the opening of the outer cover 6 near the moving ring 2 is folded inward to form a retaining edge 61. When the outer cover 6 is fitted over the telescopic spring 4, the retaining edge 61 is fitted into the annular groove 22 and pressed against the telescopic spring 4 on the moving ring 2. That is, the outer cover 6 is stably installed outside the telescopic spring 4 through the cooperation of the retaining edge 61 and the annular groove 22 on the outer cover 6. At the same time, the telescopic spring 4 itself is used to press it, without the need for a separate installation structure. The structural design is more reasonable.

[0042] Figure 2 This is a structural diagram of the fixing sleeve according to a preferred embodiment of the present invention. Figure 1 and Figure 2 As shown, the fixing sleeve 51 is arranged in a barrel shape, giving it an inner cavity that provides space for the installation of structures such as the rotating sleeve 53 and the connecting post 54. Simultaneously, one end of the barrel of the fixing sleeve 51 is threadedly connected to the side of the locking sleeve 32 opposite to the pressure sleeve 31, thus connecting the fixing sleeve 51 and the positioning sleeve 3. The connecting post 54 is threadedly installed at one end of the barrel of the fixing sleeve 51, meaning the connecting post 54 is directly connected to the positioning sleeve 3 through the fixing sleeve 51, resulting in fewer transition structures and higher stability and structural strength. Furthermore, a turning groove 511 is formed on the side wall of the barrel of the fixing sleeve 51. The turning groove 511 has a certain length in the circumference of the fixing sleeve 51, and the turning arm 55 extends from inside the turning groove 511 to outside the fixing sleeve 51, allowing the turning groove 511 to accommodate the movement of the turning arm 55 when the rotating sleeve 53 is rotated.

[0043] Figure 3 This is an exploded view of the rotating sleeve according to a preferred embodiment of the present invention; Figure 4 This is a schematic diagram of the installation of the turntable and the top actuating disk according to a preferred embodiment of the present invention; Figure 5 This is a cross-sectional view of the top or bottom dial of a preferred embodiment of the present invention. Figure 1 , Figure 2 as well as Figure 3 , Figure 4 , Figure 5As shown, the rotating sleeve 53, located within the fixed sleeve 51, includes a top actuating plate 531, a bottom actuating plate 532, and a turntable 533. The top actuating plate 531 and the bottom actuating plate 532 are stacked in an upper-lower configuration, and are coaxial and spaced apart. This ensures that the projections of the top actuating plate 531 and the bottom actuating plate 532 coincide in the axial direction of the columnar clamping rod 1, providing conditions for stable rotation within the fixed sleeve 51 and simultaneously providing driving force to both ends of the adjusting column 52. Furthermore, both the top actuating plate 531 and the bottom actuating plate 532 are provided with adjusting grooves 5311, which respectively cooperate with both ends of the subsequently installed adjusting column 52. Furthermore, the adjustment grooves 5311 on the top actuating plate 531 and the bottom actuating plate 532 are aligned axially with the columnar clamping rod 1, thereby ensuring that the guiding effect at both ends of the adjusting column 52 remains consistent when it is guided by the adjustment grooves 5311, thus preventing the adjusting column 52 from tilting and getting stuck, and maintaining the smooth movement of the adjusting column 52. Meanwhile, the adjusting column 52 has a cylindrical structure, and coaxial rotating shafts 521 are protruding from both ends of the adjusting column 52. The adjusting column 52 is installed between the top actuating plate 531 and the bottom actuating plate 532, and the two rotating shafts 521 extend into the two adjusting grooves 5311 on the top actuating plate 531 and the bottom actuating plate 532 respectively. That is, the rotating shafts 521 move within the two adjusting grooves 5311, thereby realizing the movement of the adjusting column 52 as a whole on the rotating sleeve 53. This allows the adjusting column 52 to move towards the center of the rotating sleeve 53 or to spread outward, thereby clamping or releasing the end of the punch that extends into the rotating sleeve 53. Meanwhile, the turntable 533 is stacked on and fixedly connected to the top actuating plate 531 or the bottom actuating plate 532. That is, the turntable 533 can be fixedly connected to one of the top actuating plate 531 or the bottom actuating plate 532, allowing the turntable 533 to drive the corresponding top actuating plate 531 or bottom actuating plate 532 to rotate, thereby pushing the adjusting column 52 and meeting the needs of clamping and loosening. Preferably, the outer edges of the top actuating plate 531 and the bottom actuating plate 532 are fixedly connected by a connecting column 54, meaning that the top actuating plate 531 and the bottom actuating plate 532 rotate synchronously. This avoids the problem of the adjusting column 52 tilting and getting stuck due to misalignment of the top actuating plate 531 and the bottom actuating plate 532, resulting in a more reasonable structural design. Furthermore, fixing one end of the actuating arm 55 to the side edge of the turntable 533 facilitates the operator's rotation of the turntable 533 via the actuating arm 55, making it more convenient to use. It is worth noting that the turntable 533 and the toggle arm 55 can be an integral structure, and the turntable 533, the top toggle plate 531, the bottom toggle plate 532 and the connecting column 54 can be welded together, resulting in higher structural strength.

[0044] Figure 6 This is a structural diagram of a limiting disk according to a preferred embodiment of the present invention. Figure 1and Figure 6 As shown, a limiting plate 56 is also provided inside the fixed sleeve 51 and between the rotating sleeve 53 and the bottom of the fixed sleeve 51. At this time, the limiting plate 56 is coaxially fixed on the bottom of the fixed sleeve 51. Preferably, the limiting plate 56 has a first locking hole, and the bottom of the fixed sleeve 51 has a second locking hole corresponding to the first locking hole. After the limiting plate 56 is installed inside the fixed sleeve 51, the first locking hole and the second locking hole are locked by screws to prevent the limiting plate 56 from rotating inside the fixed sleeve 51, thereby realizing the relative rotation of the limiting plate 56 and the rotating sleeve 53. Meanwhile, the limiting plate 56 has several limiting grooves 561 arranged in a circular array on it, and each limiting groove 561 corresponds to an adjustment groove 5311 on the top actuating plate 531 or the bottom actuating plate 532. That is, each adjustment groove 5311 has a corresponding limiting groove 561, and each limiting groove 561 is arranged radially along the columnar clamping rod 1. At the same time, the end of the rotating shaft 521 extending into the adjustment groove 5311 also extends into the corresponding limiting groove 561, so that when the top actuating plate 531 or the bottom actuating plate 532 is driven by the actuating arm 55 and the rotating plate 533, When the limiting plate 56 rotates, the limiting groove 561 on the limiting plate 56 restricts the rotating shaft 521 of the adjusting column 52 from rotating in the circumferential direction with the rotating sleeve 53, but does not restrict the rotating shaft 521 of the adjusting column 52 from moving radially along the rotating sleeve 53 with the adjusting groove 5311. This ensures that when the rotating sleeve 53 rotates, the circumferential position of the adjusting column 52 in the fixed sleeve 51 remains unchanged, while the radial position of the fixed sleeve 51 changes. This ensures the reliability of the adjusting column 52 moving closer to or further away from the center of the rotating sleeve 53, and the structural design is more reasonable.

[0045] More specifically, a mating plate 512 is provided circumferentially on the outer wall of the fixed sleeve 51 at the opening of the actuation groove 511. Preferably, the mating plate 512 is located on the side of the opening of the actuation groove 511 near the bottom of the fixed sleeve 51. At the same time, a first tooth block 5121 is provided on the mating plate 512 near the inner side of the groove of the actuation groove 511. Furthermore, a second tooth block 551 that meshes with the first tooth block 5121 is provided on the end of the actuation arm 55 extending outside the fixed sleeve 51. That is, the actuation arm 55 and the fixed sleeve 51 can be limited by the mutual meshing of the first tooth block 5121 and the second tooth block 551, which prevents the adjusting column 52 from automatically loosening due to the automatic rotation of the rotating sleeve 53 during the clamping process and in its natural state. This provides higher safety assurance. Furthermore, an adjusting spring 57 is provided between the connecting column 54 and the rotating sleeve 53. That is, the first tooth block 5121 and the fixed sleeve 51 are pressed together by the adjusting spring 57, which prevents the first tooth block 5121 and the second tooth block 551 from naturally separating. When clamping adjustment is required, the operator pushes the lever arm 55 with force, and the rotating sleeve 53 overcomes the force of the adjusting spring 57, causing the first tooth block 5121 and the second tooth block 551 to move in a misaligned manner, thus meeting the adjustment requirements.

[0046] The die spring for a punch press provided in this embodiment includes a columnar clamping rod 1, a moving ring 2, a positioning sleeve 3, a telescopic spring 4, and an auxiliary clamping assembly 5. By providing the auxiliary clamping assembly 5 at the end of the columnar clamping rod 1 opposite to the end where the adjusting ring 11 is located, when the punch is installed in the columnar clamping rod 1, one end of the punch can be clamped by the end of the columnar clamping rod 1 with the adjusting ring 11, while the other end of the punch is clamped by the auxiliary clamping assembly 5. This achieves clamping of both ends of the punch, effectively preventing the problem of tilting during the stamping process caused by only one end of the punch being clamped, thus ensuring stamping accuracy. In addition, the auxiliary clamping assembly 5 includes a fixed sleeve 51, a rotating sleeve 53, and an adjusting column 52. The rotating sleeve 53 is rotatably installed inside the fixed sleeve 51. The rotating sleeve 53 is provided with an adjusting groove 5311 arranged in an arc shape with its two ends located on the outer and inner sides of the rotating sleeve 53, respectively. The end of the adjusting column 52 extends into the adjusting groove 5311. By rotating the rotating sleeve 53, the adjusting column can be moved closer to the center of the rotating sleeve 53 or spread outward, thereby clamping or releasing the punch. Furthermore, it can adapt to the clamping requirements of punches of different diameters, with higher structural flexibility and convenient production and processing.

[0047] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. A die spring for a punch press, characterized in that, include: A columnar clamp rod, wherein the columnar clamp rod is a hollow columnar structure, and an integrally arranged adjusting ring is provided at one end of the columnar clamp rod. Furthermore, a number of spaced strip gaps are opened along the axial direction on the side wall of the end of the columnar clamp rod where the adjusting ring is located, and each of the strip gaps penetrates the adjusting ring. At the same time, a number of adjusting holes are opened along the axial direction on the adjusting ring, and the outer wall of the end of the columnar clamp rod where the adjusting ring is located is tapered. The end of the columnar clamp rod closer to the adjusting ring is the larger end. A movable ring having a central hole, the central hole being a conical hole, the movable ring being sleeved on the outside of one end of the columnar clamping rod having a conical surface, and the wall of the conical hole fitting against the conical surface of the columnar clamping rod; at the same time, an adjusting screw is provided in the adjusting hole, and the end of the adjusting screw extends out of the adjusting hole and abuts against the movable ring; A positioning sleeve is fixedly fitted onto the end of the columnar clamp rod that is away from the adjusting ring. A telescopic spring, wherein the telescopic spring is sleeved outside the columnar clamp and its two ends abut against the positioning sleeve and the moving ring respectively; An auxiliary clamping assembly includes a fixed sleeve, an adjusting column, a rotating sleeve, and a connecting column. The fixed sleeve is fixedly installed on the end of the positioning sleeve away from the telescopic spring. The fixed sleeve has an inner cavity in which a rotating sleeve, coaxially arranged with the columnar clamping rod, is rotatably installed. The rotating sleeve has several adjusting grooves arranged in a circular array around the axis of the columnar clamping rod. Each adjusting groove is arc-shaped, with its two ends located on the outer and inner sides of the rotating sleeve, respectively. An adjusting column, sliding along the adjusting groove, is installed in each adjusting groove along the axial direction of the columnar clamping rod. The connecting column is located on the side of the fixed sleeve away from the positioning sleeve, sealing the inner cavity of the fixed sleeve. The connecting column is connected to the punch head of a punch press. Simultaneously, an actuating arm, arranged along the axial direction of the columnar clamping rod and extending beyond the fixed sleeve, is provided on the outer edge of the rotating sleeve.

2. The die spring for a punch press according to claim 1, characterized in that, The positioning sleeve includes a pressure sleeve and a locking sleeve. The pressure sleeve is slidably sleeved on the columnar clamping rod and abuts against the telescopic spring. The locking sleeve is disposed on the side of the pressure sleeve away from the telescopic spring and is threadedly connected to the columnar clamping rod.

3. The die spring for a punch press according to claim 2, characterized in that, The pressure sleeve has a first positioning hole, and the locking sleeve has a second positioning hole, and the first positioning hole and the second positioning hole are locked together by screws.

4. The die spring for a punch press according to claim 1, characterized in that, A flexible rubber tube is provided in each of the adjusting rings and in each of the strip gaps.

5. The die spring for a punch press according to claim 1, characterized in that, It also includes an outer cover, which is cylindrical and is fitted over the telescopic spring.

6. The die spring for a punch press according to claim 5, characterized in that, An annular groove is formed on the outer edge of the movable ring and on the side near the positioning sleeve. The opening of the outer cover on the side near the movable ring is folded inward to form a retaining edge. When the outer cover is fitted over the telescopic spring, the retaining edge is embedded in the annular groove and pressed against the telescopic spring on the movable ring.

7. The die spring for a punch press according to claim 2, characterized in that, The fixing sleeve is arranged in a barrel shape. One end of the bottom of the fixing sleeve is threadedly connected to the side of the locking sleeve away from the pressure sleeve. The connecting post is threadedly installed at one end of the barrel opening of the fixing sleeve. Furthermore, an actuating groove is formed on the side wall of the fixing sleeve, and the actuating arm extends from the actuating groove to the outside of the fixing sleeve.

8. The die spring for a punch press according to claim 7, characterized in that, The rotating sleeve includes a top actuating plate, a bottom actuating plate, and a turntable. The top and bottom actuating plates are arranged coaxially in upper and lower layers. Both the top and bottom actuating plates are provided with adjustment grooves, and the adjustment grooves on the top and bottom actuating plates are directly opposite each other in the axial direction of the columnar clamp. The adjustment column is a cylindrical structure, and coaxial rotating shafts protrude from both ends of the adjustment column. The adjustment column is installed between the top and bottom actuating plates, and the two rotating shafts extend into the two directly opposite adjustment grooves on the top and bottom actuating plates, respectively. The turntable is stacked on the top or bottom actuating plate and fixedly connected. One end of the actuating arm is fixedly connected to the side edge of the turntable.

9. The die spring for a punch press according to claim 8, characterized in that, It also includes a limiting plate, which is disposed between the bottom of the rotating sleeve and the fixed sleeve, and the limiting plate is coaxially fixed to the bottom of the fixed sleeve. At the same time, the limiting plate has a plurality of limiting grooves arranged in a circular array, and each limiting groove corresponds to an adjustment groove. Furthermore, each limiting groove is arranged radially along the columnar clamp, and the end of the rotating shaft extending into the adjustment groove also extends into the corresponding limiting groove.

10. The die spring for a punch press according to claim 8 or 9, characterized in that, A mating plate is provided on the outer wall of the fixed sleeve and at the opening of the actuating groove along its circumference. A first tooth block is provided on the mating plate. A second tooth block that meshes with the first tooth block is provided on one end of the actuating arm that extends outside the fixed sleeve. An adjusting spring is provided between the connecting column and the rotating sleeve.

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