A small gap blanking insert die for tailor-welded blank

Abstract

This utility model discloses a small-gap punching insert mold for welded steel plates, relating to the field of welded steel plate punching processing technology. It includes a lower mold base and an upper mold base. A lower mold insert is fixedly connected to the upper side of the lower mold base. A sheet metal limiting mechanism is installed on the upper side of the lower mold base, and a pressing mechanism is installed at the bottom of the upper mold base. An upper mold insert is slidably connected to one side of a pressure plate. A positioning groove is provided on the outside of the upper mold insert. A fixed seat is fixedly connected to the upper side of the lower mold base. An adjusting mechanism is installed outside the fixed seat, and a guiding mechanism is installed between the pressure plate and the lower mold base. This mold uses a manually adjustable push rod to control the position of the upper mold insert, achieving precise extrusion and shearing with a small gap, eliminating the punching fracture zone and forming a fully bright band. Combined with elastic rollers and the limiting groove to form a flexible clamping channel, it achieves non-destructive positioning of the sheet metal and automatic feeding. The guide post interlocking ensures continuous punching accuracy, completely solving the welding cracking problem caused by the welded steel plate fracture zone.

Description

Technical Field

[0001] This utility model relates to the field of blanking processing technology for welded plates, and specifically to a die for blanking inserts with small gaps in welded plates. Background Technology

[0002] In the automotive parts manufacturing industry, sheet metal stamping is a key process in the production of body parts. Traditional stamping processes are widely used for sheet metal separation, and technological development has mainly focused on improving die life and optimizing stamping efficiency. Currently, the industry generally uses standardized stamping dies for mass production, using rigid inserts to cut the sheet metal.

[0003] Existing blanking dies employ a fixed-gap upper and lower die insert structure, with guide pillars guiding the blanking action. This solution uses an elastic pressure plate to control the sheet metal position and locating pins to ensure die closing accuracy. However, this device has limitations in blanking gap adjustment; the gap can only be adjusted by replacing inserts of different thicknesses, and it cannot dynamically control the micron-level gap in continuous production.

[0004] The aforementioned existing technology exhibits three main drawbacks in practical applications: First, the fixed insert gap cannot meet the precision gap requirements of the welded plate, resulting in fracture zones on the punched section; second, the plate positioning relies on a rigid limiting structure, which easily scratches the plate edges during transport; and third, gap adjustment requires stopping the machine to disassemble the mold, severely restricting the continuous production rhythm. These problems collectively lead to insufficient welding qualification rate of the welded plate, requiring additional manual grinding processes and significantly increasing production costs.

[0005] Based on this, this utility model designs a small-gap punching insert mold for welded plates to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a die for small gap punching inserts of welded plates.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A die for punching inserts with small gaps in welded plates includes a lower die set and an upper die set, and further includes a sheet material limiting mechanism, a pressing mechanism, an adjusting mechanism, and a guiding mechanism. A lower die insert is fixedly connected to the upper side of the lower die set, and a sheet material feed seat is fixedly connected to the outside of the lower die set. The sheet material limiting mechanism is installed on the upper side of the lower die set, and the pressing mechanism is installed at the bottom of the upper die set. A pressure plate is connected to the lower side of the pressing mechanism, and an upper die insert is slidably connected to one side of the pressure plate. A positioning groove is provided on the outside of the upper die insert. A fixed seat is fixedly connected to the upper side of the lower die set, and the adjusting mechanism is installed outside the fixed seat. The guiding mechanism is installed between the pressure plate and the lower die set.

[0009] Furthermore, the sheet metal limiting mechanism includes an elastic plate, a connecting plate, elastic rollers, and a sheet metal limiting seat. The elastic plate is fixedly connected to the upper side of the lower mold frame, and multiple sets of elastic plates are provided. The connecting plate is fixedly connected to the upper side of the elastic plate, and both the elastic plate and the connecting plate are made of elastic material. The elastic rollers are rotatably connected to the ends of the connecting plate and the elastic plate. The two sets of elastic rollers are made of elastic material and abut against each other. The sheet metal limiting seat is fixedly connected to the upper side of the lower mold frame.

[0010] Furthermore, the sheet metal limiting seat is fixedly connected to the upper side of the lower mold frame, and a limiting groove is provided on the side of the sheet metal limiting seat near the elastic plate, and the sheet metal limiting is slidably connected between the limiting groove and the elastic roller.

[0011] Furthermore, the pressing mechanism includes a cylinder and a telescopic rod. The cylinder is fixedly connected to the bottom of the upper mold frame, and the output shaft of the cylinder is fixedly connected to the pressure plate. The telescopic rod is fixedly connected to the upper side of the pressure plate, and the telescopic rod is slidably connected to the upper mold frame.

[0012] Furthermore, the adjustment mechanism includes a push rod, a push block, a spring, a positioning nut, and a control plate. The push rod is slidably connected to the outside of the fixed base, the push block is fixedly connected to the end of the push rod, and the spring is fixedly connected between the fixed base and the push block, with the spring sleeved on the outside of the push rod.

[0013] Furthermore, the front end of the push rod is provided with a threaded groove, and there are two sets of positioning nuts that are threadedly connected to the outside of the threaded groove. The control plate is fixedly connected to the outside of the push rod, and the control plate is positioned between the two sets of positioning nuts.

[0014] Furthermore, the guiding mechanism includes a guide post and a positioning seat, the guide post being fixedly connected to the lower side of the upper mold frame, and the positioning seat being fixedly connected to the upper side of the lower mold frame.

[0015] Furthermore, the upper side of the lower mold frame is provided with a guide hole, and the guide hole matches the guide post. The lower side of the pressure plate is provided with a slot and a groove, the slot matches the plate limiting seat, and the groove matches the positioning seat.

[0016] Compared with the prior art, the advantages of this utility model are as follows: 1. The small gap punching insert mold of the welded plate can control the position of the upper mold insert by manually adjusting the push rod, so as to realize the extrusion and shearing of the tiny precision gap, so that the punching section forms a burr-free bright band, completely avoiding the problem of weld cracking of welded plate caused by traditional fracture band, significantly improving the welding qualification rate and saving the manual grinding process.

[0017] 2. This small-gap punching insert mold for welded plates uses elastic rollers and limiting grooves to form an adaptive clamping channel, ensuring no scratches and precise positioning during the material conveying process. Combined with the guide post fitting and slot positioning design, it ensures the repeatability of mold closing, realizes automatic material feeding and continuous cycle operation after punching, and greatly improves production efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a perspective view of a small-gap punching insert mold for welded plates according to the present invention;

[0020] Figure 2 This is a schematic diagram of the first partial structure of the present invention;

[0021] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 This is a second perspective view of the present invention;

[0023] Figure 5 This is a schematic diagram of the second partial structure of the present invention;

[0024] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0025] Figure 7 for Figure 2 A magnified view of point C in the middle.

[0026] The labels in the diagram represent:

[0027] 1. Lower mold frame; 2. Lower mold insert; 3. Sheet metal feed seat; 4. Elastic plate; 5. Connecting plate; 6. Elastic roller; 7. Upper mold frame; 8. Cylinder; 9. Telescopic rod; 10. Pressure plate; 11. Upper mold insert; 12. Positioning groove; 13. Fixed seat; 14. Push rod; 15. Push block; 16. Spring; 17. Positioning nut; 18. Control board; 19. Guide hole; 20. Guide post; 21. Sheet metal limit seat; 22. Slot; 23. Positioning seat; 24. Slot. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] Example 1: In some embodiments, please refer to the accompanying drawings. Figures 1-7 A small-gap punching insert die for welded plates includes a lower die frame 1 and an upper die frame 7. The lower die frame 1 serves as the basic support structure for the entire die, providing an installation platform and stable support for other functional components. A lower die insert 2 is fixedly connected to the upper side of the lower die frame 1. The lower die insert 2 serves as the main punching cutting edge component, and its cutting edge shape and dimensional accuracy directly affect the punching quality. A sheet metal feed seat 3 is fixedly connected to the outside of the lower die frame 1. The sheet metal feed seat 3 is used to guide the sheet metal into the punching station to ensure the accuracy and continuity of sheet metal feeding.

[0030] The sheet metal limiting mechanism is installed on the upper side of the lower mold frame 1. The sheet metal limiting mechanism includes an elastic plate 4, a connecting plate 5, elastic rollers 6, and a sheet metal limiting seat 21. The elastic plate 4 is fixedly connected to the upper side of the lower mold frame 1, and multiple sets of elastic plates 4 are provided. The elastic plate 4 serves as an elastic support element, providing elastic support force to the connecting plate 5. The connecting plate 5 is fixedly connected to the upper side of the elastic plate 4. Both the elastic plate 4 and the connecting plate 5 are made of elastic material. The connecting plate 5 serves as a transition connector, transmitting the elastic force to the elastic rollers 6. The elastic rollers 6 are rotatably connected to both the connecting plate 5 and the elastic plate 6. At the end of 4, two sets of elastic rollers 6 are made of elastic material and abut against each other. The elastic rollers 6 achieve flexible positioning and limiting of the sheet metal through elastic clamping. The sheet metal limiting seat 21 is fixedly connected to the upper side of the lower die frame 1. The sheet metal limiting seat 21 has a limiting groove on the side near the elastic plate 4, and the sheet metal limiting is slidably connected between the limiting groove and the elastic rollers 6. The sheet metal limiting seat 21 is fixedly connected to the upper side of the lower die frame 1. The sheet metal limiting seat 21 and the elastic rollers 6 together form the sheet metal conveying channel to ensure the accurate positioning of the sheet metal during the punching process.

[0031] The pressing mechanism is installed at the bottom of the upper die frame 7. The pressing mechanism includes a cylinder 8 and a telescopic rod 9. The cylinder 8 is fixedly connected to the bottom of the upper die frame 7, and the output shaft of the cylinder 8 is fixedly connected to the pressure plate 10. The cylinder 8 serves as a power source to provide stable downward pressure for the punching process. The telescopic rod 9 is fixedly connected to the upper side of the pressure plate 10, and the telescopic rod 9 is slidably connected to the upper die frame 7. The telescopic rod 9 is used to assist in guiding the movement of the pressure plate 10 and ensure the smoothness of the pressing action. An upper die insert 11 is slidably connected to one side of the pressure plate 10. A positioning groove 12 is provided on the outside of the upper die insert 11. The upper die insert 11 serves as the punching cutting edge component of the upper die and cooperates with the lower die insert 2 to complete the punching action. The positioning groove 12 is used to ensure the installation accuracy of the upper die insert 11.

[0032] A fixed base 13 is fixedly connected to the upper side of the lower mold frame 1. The fixed base 13 serves as the mounting base for the adjustment mechanism, providing stable support for the push rod 14. The adjustment mechanism is installed outside the fixed base 13 and includes the push rod 14, the push block 15, the spring 16, the positioning nut 17, and the control plate 18. The push rod 14 is slidably connected to the outside of the fixed base 13. As an adjustment actuator, the push rod 14 drives the push block 15 to move through axial movement. The push block 15 is fixedly connected to the end of the push rod 14 and is used to push the upper mold insert 11 to adjust its position. Spring 16 is fixedly connected between fixed base 13 and push block 15, and spring 16 is sleeved on the outside of push rod 14. Spring 16 provides reset force to ensure the stability of position after adjustment. The front end of push rod 14 is provided with threaded groove. There are two sets of positioning nuts 17, which are threadedly connected to the outside of the threaded groove. Positioning nuts 17 are used to lock the position of push rod 14. Control plate 18 is fixedly connected to the outside of push rod 14, and control plate 18 is abutted and positioned between the two sets of positioning nuts 17. Control plate 18 serves as an operating handle to facilitate manual adjustment of the position of push rod 14.

[0033] A guiding mechanism is installed between the pressure plate 10 and the lower mold base 1. The guiding mechanism includes a guide post 20 and a positioning seat 23. The guide post 20 is fixedly connected to the lower side of the upper mold base 7. The guide post 20 serves as a guiding element to ensure the mold closing accuracy of the upper mold base 7 and the lower mold base 1. The positioning seat 23 is fixedly connected to the upper side of the lower mold base 1. The positioning seat 23 cooperates with the guide post 20 to provide additional positioning function. A guide hole 19 is provided on the upper side of the lower mold base 1, and the guide hole 19 matches the guide post 20. The guide hole 19 is used to guide the movement trajectory of the guide post 20. A slot 22 and a slot 24 are provided on the lower side of the pressure plate 10. The slot 22 matches the sheet metal limiting seat 21. The slot 22 is used to ensure the fitting accuracy between the pressure plate 10 and the sheet metal limiting seat 21. The slot 24 matches the positioning seat 23. The slot 24 is used to enhance the connection stability between the pressure plate 10 and the positioning seat 23.

[0034] In this embodiment, during the blanking process of the welded plate, the plate material is conveyed to the upper part of the lower die holder 1 via the plate material feed seat 3 and precisely positioned by the plate material limiting mechanism. In this mechanism, when the plate material is pushed in, multiple sets of elastic plates 4 support the connecting plate 5. The elastic rollers 6 assembled at the end abut against the limiting groove of the plate material limiting seat 21 to form a flexible clamping channel. The plate material slides along the limiting groove of the plate material limiting seat 21 into the upper part of the elastic rollers 6. The elastic material properties enable it to adaptively clamp the edge of the plate material, avoiding scratches while ensuring stable conveying of the plate material during the blanking process and providing conditions for subsequent continuous feeding.

[0035] During the blanking process, the cylinder 8 of the pressing mechanism drives the pressure plate 10 to move downwards, with the telescopic rod 9 providing auxiliary guidance. The pressure plate 10 first presses the sheet metal, and then the upper die insert 11 and the lower die insert 2 cooperate to complete the key blanking action. Its core innovation lies in achieving 0.02mm precision gap control through the adjustment mechanism. During operation, the positioning nut 17 is loosened, and the control plate 18 is manually rotated to drive the push rod 14 to move horizontally. The push block 15 then pushes the upper die insert 11 to slide laterally along the pressure plate 10 to achieve contact and complete positioning, thereby precisely reducing the gap between the upper die insert 11 and the lower die insert 2 to the target value. The spring 16 provides a reverse restoring force to ensure adjustment stability. This micro-gap causes the sheet metal to be subjected to compression and shearing action. Completely eliminates the fracture zone caused by traditional punching, forming a burr-free, fully bright cross-section. After punching, the cylinder 8 returns, and the pressure plate 10 rises and resets, allowing another set of plates to be pushed in through the plate feed seat 3. This allows the plates stored inside to automatically enter the work station. Simultaneously, the guiding mechanism aligns the guide post 20 with the guide hole 19 of the lower die holder 1, and the slots 22 and 24 of the pressure plate 10 precisely engage with the plate limiting seat 21 and positioning seat 23, respectively, ensuring the repeatability of mold closing and supporting continuous and efficient production cycles. Thus, through the synergy of dynamic gap adjustment and elastic limiting mechanism, the problem of welding cracks caused by fracture zones is fundamentally solved, significantly improving the quality of welded plates and production efficiency.

[0036] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A die for punching inserts with small gaps in welded plates, comprising a lower die set (1) and an upper die set (7), characterized in that: It also includes a sheet metal limiting mechanism, a pressing mechanism, an adjusting mechanism and a guiding mechanism. A lower mold insert (2) is fixedly connected to the upper side of the lower mold frame (1). A sheet metal feeding seat (3) is fixedly connected to the outside of the lower mold frame (1). The sheet metal limiting mechanism is installed on the upper side of the lower mold frame (1). The pressing mechanism is installed at the bottom of the upper mold frame (7). A pressure plate (10) is connected to the lower side of the pressing mechanism. An upper mold insert (11) is slidably connected to one side of the pressure plate (10). A positioning groove (12) is opened on the outside of the upper mold insert (11). A fixed seat (13) is fixedly connected to the upper side of the lower mold frame (1). The adjusting mechanism is installed on the outside of the fixed seat (13). The guiding mechanism is installed between the pressure plate (10) and the lower mold frame (1).

2. The die for punching small gap inserts of welded plates according to claim 1, characterized in that, The sheet metal limiting mechanism includes an elastic plate (4), a connecting plate (5), elastic rollers (6), and a sheet metal limiting seat (21). The elastic plate (4) is fixedly connected to the upper side of the lower mold frame (1), and multiple sets of elastic plates (4) are provided. The connecting plate (5) is fixedly connected to the upper side of the elastic plate (4), and both the elastic plate (4) and the connecting plate (5) are made of elastic material. The elastic rollers (6) are rotatably connected to the ends of the connecting plate (5) and the elastic plate (4). The two sets of elastic rollers (6) are made of elastic material, and the two sets of elastic rollers (6) abut against each other. The sheet metal limiting seat (21) is fixedly connected to the upper side of the lower mold frame (1).

3. The die for punching small gap inserts of welded plates according to claim 2, characterized in that, The plate material limiting seat (21) is fixedly connected to the upper side of the lower mold frame (1). The plate material limiting seat (21) has a limiting groove on the side near the elastic plate (4), and the plate material limiting is slidably connected between the limiting groove and the elastic roller (6).

4. The die for punching small gap inserts of welded plates according to claim 1, characterized in that, The pressing mechanism includes a cylinder (8) and a telescopic rod (9). The cylinder (8) is fixedly connected to the bottom of the upper mold frame (7), and the output shaft of the cylinder (8) is fixedly connected to the pressure plate (10). The telescopic rod (9) is fixedly connected to the upper side of the pressure plate (10), and the telescopic rod (9) is slidably connected to the upper mold frame (7).

5. The die for punching small gap inserts of welded plates according to claim 1, characterized in that, The adjustment mechanism includes a push rod (14), a push block (15), a spring (16), a positioning nut (17), and a control plate (18). The push rod (14) is slidably connected to the outside of the fixed seat (13). The push block (15) is fixedly connected to the end of the push rod (14). The spring (16) is fixedly connected between the fixed seat (13) and the push block (15), and the spring (16) is sleeved on the outside of the push rod (14).

6. The die for punching small gap inserts of welded plates according to claim 5, characterized in that, The push rod (14) has a threaded groove at its front end. There are two sets of positioning nuts (17) that are threaded to the outside of the threaded groove. The control plate (18) is fixedly connected to the outside of the push rod (14) and is positioned between the two sets of positioning nuts (17).

7. The die for punching small gap inserts of welded plates according to claim 3, characterized in that, The guiding mechanism includes a guide post (20) and a positioning seat (23). The guide post (20) is fixedly connected to the lower side of the upper mold frame (7), and the positioning seat (23) is fixedly connected to the upper side of the lower mold frame (1).

8. The die for punching small gap inserts of welded plates according to claim 7, characterized in that, The lower mold frame (1) has a guide hole (19) on its upper side, and the guide hole (19) matches the guide post (20). The pressure plate (10) has a slot (22) and a slot (24) on its lower side. The slot (22) matches the plate limiting seat (21), and the slot (24) matches the positioning seat (23).

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