Steel plate punching double-wrapping die

Abstract

The invention belongs to the technical field of machining production, and particularly discloses a steel plate punching double-wrapping die which comprises a punching machine table top, a punching machine sliding block, a die handle, a lower die plate and a plurality of bearings, an upper die fixing assembly is fixedly connected to the die handle, two punches are arranged in the upper die fixing assembly, the lower die plate is located on the punch table top, a lower die base plate and a fixing plate are arranged on the lower die plate, and the bearings are arranged on the lower die base plate. The fixed plate is provided with two concave dies, the two punches and the two concave dies are correspondingly arranged, the fixed plate is further provided with a linkage mechanism used for positioning a steel plate, the linkage mechanism comprises a plurality of connecting rods and gears, and through the precise linkage mechanism composed of the gears, the connecting rods and the bearings, the steel plate can be accurately positioned. The positions of the two screws can be synchronously, equidistantly and accurately adjusted only by rotating the hand wheel, and complexity, time consumption and asynchronous errors caused by one-by-one adjustment in a traditional mode are thoroughly avoided.

Description

Technical Field

[0001] This invention relates to the field of mechanical processing and production technology, specifically to a steel plate punching double-sided mold. Background Technology

[0002] Leaf springs, as important mechanical components, are widely used in automobiles, machinery, and other fields. A leaf spring is composed of multiple stacked steel plates, secured in the middle with center bolts or U-bolts. Double-stamping is an essential step in the manufacturing process of many leaf spring products. Double-stamping in the middle of automotive leaf springs is a special processing technique performed on the middle part of the spring. Specifically, it involves stamping two opposing, bun-shaped protrusions in the middle of the leaf spring. These two protrusions are blind holes, meaning they are not interconnected.

[0003] The emergence of double-wrapping technology optimizes the processing of leaf springs. On the one hand, through improvements in mold design and stamping equipment, double wrapping can be achieved in a single stamping, increasing production efficiency. On the other hand, it allows for better control of the dimensional and positional accuracy of the holes, meeting the high-precision requirements of modern automobiles for parts. Simultaneously, it facilitates better integration with subsequent processing steps (such as surface treatment and assembly), enhancing the automation level and production quality of the entire production process.

[0004] Traditional punching processes have limitations when machining holes with complex shapes or special requirements. In traditional leaf spring stamping dies, workers typically need to manually place the steel plate onto the die. This placement method results in low positioning accuracy between the steel plate and the die, easily causing workpiece misalignment or jamming, leading to decreased machining accuracy and affecting production efficiency and finished product quality. Therefore, there is an urgent need for a stamping die with accurate positioning and reliable material removal. Summary of the Invention

[0005] The purpose of this invention is to provide a double-sided die for punching steel plates, so as to solve the problem that the method of manually placing steel plates on the die results in low positioning accuracy between the steel plates and the die, which can easily cause workpiece skewing or jamming, leading to a decrease in processing accuracy.

[0006] To achieve the above objectives, the basic solution provided by this invention is as follows: a steel plate punching double-sided die, comprising a punch press table, a punch press slide, a die shank, a lower die plate, and several bearings. The die shank is detachably connected to the punch press slide. An upper die fixing assembly is provided at the end of the die shank away from the punch press slide. Two punches are provided inside the upper die fixing assembly. The lower die plate is located on the punch table. A lower die pad is provided on the lower die plate. A fixing plate is provided on the lower die pad. Two dies are provided on the fixing plate. The two punches are correspondingly arranged with the two dies. A support rod 1, a support rod 2, a positioning rod 1, and a positioning rod 2 are provided on the lower die plate. A housing 1 is provided on the support rod 1, a housing 2 is provided on the support rod 2, a housing 3 is provided on the positioning rod 1, and a housing 4 is provided on the positioning rod 2. Connecting rod 1 and connecting rod 2 are respectively connected to housing 1 horizontally and vertically through bearings. The end of connecting rod 2 away from housing 1 is connected to housing 2 through bearings. The longitudinal direction of housing 2 is connected to connecting rod 3 via bearing. The end of connecting rod 3 away from housing 2 is connected to housing 4 via bearing. The end of connecting rod 1 away from housing 1 is connected to housing 3 via bearing. The longitudinal direction of housing 3 is connected to screw 1 via bearing. The longitudinal direction of housing 4 is connected to screw 2 via bearing. Gear 1 and gear 2 are fixedly passed through both ends of connecting rod 1, gear 3 and gear 4 are fixedly passed through both ends of connecting rod 2, and gear 5 and gear 6 are fixedly passed through both ends of connecting rod 3. Gear 7 is movably passed through screw 1, and gear 8 is movably passed through screw 2. Gear 1 and gear 3 mesh inside housing 1, gear 4 and gear 5 mesh inside housing 2, gear 2 and gear 7 mesh inside housing 3, and gear 6 and gear 8 mesh inside housing 4. A handwheel is provided on housing 1, and one end of the handwheel is connected to connecting rod 1.

[0007] The working principle of this invention is as follows: The operator places the steel plate on the fixed plate, then rotates the handwheel, driving the connecting rod one and its gears one and two to rotate. Gear one meshes with gear three inside the housing one, driving the connecting rod two and gear four to rotate; gear four meshes with gear five inside the housing two, driving the connecting rod three and gear six to rotate. Simultaneously, gear two meshes with gear seven inside the housing three, driving screw one; gear six meshes with gear eight inside the housing four, driving screw two. Through this precision linkage mechanism composed of multiple gears, connecting rods, and bearings, the single rotational motion of the handwheel is synchronously transmitted and converted into the same-direction, synchronous rotational motion of the two screws, thereby precisely and synchronously adjusting the lateral position of the steel plate on the fixed plate. Then, the punch press slide is manually activated, driving the punch to press down. The positioning rod and support rod system provide stable support and guidance for the entire adjustment mechanism.

[0008] The beneficial effects of this invention are as follows: The core advantage of this mold lies in its unique manual synchronous adjustment mechanism. Through precise gear meshing and linkage transmission, the positions of the two screws can be adjusted synchronously, equidistantly, and precisely by simply turning the handwheel, completely avoiding the tediousness, time-consuming nature, and asynchronous errors caused by adjusting them one by one in the traditional method. The application of bearings reduces transmission resistance, making the adjustment operation light and effortless. This design improves the accuracy and efficiency of steel plate positioning, ensures the consistency of the double-wrapped steel plate dimensions, and also enhances the rigidity and stability of the mold structure, extending its service life.

[0009] Option 2, a preferred option of the basic design, includes an upper mold fixing assembly comprising an upper template and a T-shaped fixing plate. The T-shaped fixing plate has two through holes, and screws connect the upper template and the T-shaped fixing plate. The upper template and the punch fixing plate are detachably connected via screws, and the mold shank is fixed to the upper template. This structure achieves detachable connections between the upper template, the T-shaped fixing plate, and the punch fixing plate via screws, facilitating punch installation, replacement, and maintenance. It also ensures precise positioning of the two punches within the through holes of the T-shaped fixing plate, enhancing the overall structural stability and assembly flexibility.

[0010] Option 3, a preferred embodiment of Option 2, consists of a punch comprising a head, a connecting block, and a limiting block. The head is fixedly connected to the connecting block, and the connecting block is fixedly connected to the limiting block. The head is located outside the through hole, while both the connecting block and the limiting block are located within the T-shaped fixing plate. This segmented punch structure, through the design of the limiting block being built into the T-shaped fixing plate, effectively constrains the lateral displacement and axial movement of the punch, ensuring precise alignment of the head and the die during the stamping process. It also enhances the punch's stability against eccentric impacts and extends its service life.

[0011] Option 4, the preferred option of the basic scheme, features a positioning pin on the fixed plate, located at the exact center of the plate. This positioning pin provides a unified reference for the synchronous adjustment of the screws on both sides, ensuring that the double concave molds corresponding to the steel plate are always symmetrical about the center axis, effectively improving the symmetry accuracy and dimensional consistency of the product coating process. Option 5, an optimal choice from the basic options, features two L-shaped blocks on the lower die plate, located on either side of the lower die pad and the fixing plate. These L-shaped blocks provide rigid restraint to the pressed steel plate, effectively preventing it from being lifted upwards by the frictional force of the punch.

[0012] Option 6, an optimal choice from Option 3, features a punch length of 60mm and a head length of 18mm. The 18mm thickened head significantly enhances the bending strength of the punch tip, creating a scientific height-to-diameter ratio when combined with the 60mm total length. The head accounts for 30% of the total length, effectively suppressing elastic deformation and vibration during stamping, ensuring uniform wall thickness of the double-packed product, and reducing the risk of head breakage. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the installation of a double-sided punching mold for steel plates according to the present invention; Figure 2 This is a perspective view of the components on the lower template of a steel plate punching double-layer die according to the present invention; Figure 3 yes Figure 2 The three-dimensional image with shells one, two, three, and four removed; Figure 4 yes Figure 3 A magnified view of a section at point A in the middle; Figure 5 This is a perspective view of the upper die fixing component, die shank, and punch in a steel plate punching double-layer die of the present invention; Figure 6 yes Figure 5 Exploded view; Figure 7 This is a perspective view of the punch in a steel plate punching double-sided mold according to the present invention. Detailed Implementation

[0014] The present invention will be further described in detail below through specific embodiments: The reference numerals in the accompanying drawings include: 1. Punch press table, 2. Punch press slide, 3. Die shank, 4. Lower die plate, 5. Bearing, 6. Upper die fixing assembly, 601. Upper die plate, 602. T-shaped fixing plate, 603. Through hole, 604. Screw, 7. Punch, 701. Head, 702. Connecting block, 703. Limiting block, 8. Lower die pad, 9. Fixing plate, 10. Die, 11. Support rod one, 12. Support rod two, 13. Positioning rod 14. Positioning rod 2, 15. Sleeve 1, 16. Sleeve 2, 17. Sleeve 3, 18. Sleeve 4, 19. Connecting rod 1, 20. Connecting rod 2, 21. Connecting rod 3, 22. Screw 1, 23. Screw 2, 24. Gear 1, 25. Gear 2, 26. Gear 3, 27. Gear 4, 28. Gear 5, 29. Gear 6, 30. Gear 7, 31. Gear 8, 32. Handwheel, 33. Positioning post, 34. L-shaped stop block.

[0015] Example The implementation examples are basically as follows Figures 1 to 7As shown: A steel plate punching double-sided die includes a punch press table 1, a punch press slide 2, a die shank 3, a lower die plate 4, and several bearings 5. The die shank 3 is detachably connected to the punch press slide 2. An upper die fixing assembly 6 is provided at the end of the die shank 3 away from the punch press slide 2. Two punches 7 are provided in the upper die fixing assembly 6. The upper die fixing assembly 6 includes an upper die plate 601 and a T-shaped fixing plate 602. The T-shaped fixing plate 602 has two through holes 603. A screw 604 is provided between the upper die plate 601 and the T-shaped fixing plate 602. The upper die plate 601 and the T-shaped fixing plate 602 are detachably connected by the screw 604. The die shank 3 is fixedly connected to the upper die plate 601. The punches 7 are composed of a head 701, a connecting block 702, and a limiting block 703. The head 701 is fixedly connected to the connecting block 702. The connecting block 702 is fixedly connected to the limiting block 703. The head 701 is located outside the through hole 603. Both the connecting block 702 and the limiting block 703 are located inside the T-shaped fixing plate 602. The total length of the punch 7 is 60mm, and the length of the head 701 is 18mm. The lower template 4 is located on the punch press table 1. The lower template 4 is provided with a lower die pad 8. The lower die pad 8 is provided with a fixing plate 9. The fixing plate 9 is provided with two dies 10. The fixing plate 9 is provided with a positioning pin 33, which is located at the center of the fixing plate 9. The two punches 7 and the two dies 10 are correspondingly set. The lower template 4 is provided with two L-shaped stops 34, which are located on one side of the lower die pad 8 and the fixing plate 9. The lower template 4 is provided with a support rod 11, a support rod 2, and a fixing rod 12. Positioning rod 13 and positioning rod 2 14 are provided. Support rod 11 is equipped with sleeve 15, support rod 2 12 is equipped with sleeve 2 16, positioning rod 13 is equipped with sleeve 3 17, and positioning rod 2 14 is equipped with sleeve 4 18. The transverse and longitudinal directions of sleeve 1 15 are respectively connected to connecting rod 19 and connecting rod 20 via bearings 5. The end of connecting rod 20 away from sleeve 1 15 is connected to sleeve 2 16 via bearing 5. The longitudinal direction of sleeve 2 16 is connected to connecting rod 3 21 via bearing 5. The end of connecting rod 3 21 away from sleeve 2 16 is connected to sleeve 4 18 via bearing 5. The end of connecting rod 19 away from sleeve 1 15 is connected to sleeve 3 17 via bearing 5. The longitudinal direction of sleeve 3 17 is connected to screw 1 22 via bearing 5. The longitudinal direction of sleeve 4 18 is connected to... A screw 23 is connected to a bearing 5. Gear 24 and gear 25 are fixedly passed through both ends of a connecting rod 19. Gear 36 and gear 47 are fixedly passed through both ends of a connecting rod 20. Gear 528 and gear 629 are fixedly passed through both ends of a connecting rod 31. Gear 730 is movably passed through a screw 12. Gear 831 is movably passed through a screw 23. Gear 124 meshes with gear 326 inside a housing 15. Gear 427 meshes with gear 528 inside a housing 26. Gear 25 meshes with gear 730 inside a housing 37. Gear 629 meshes with gear 831 inside a housing 418. A handwheel 32 is provided on a housing 15. One end of the handwheel 32 is connected to a connecting rod 19.

[0016] The implementation method of this embodiment is as follows: When installing the mold, first, insert the two punches 7 into the through holes 603 of the T-shaped fixing plate 602, ensuring that the limiting block 703 is built into the T-shaped fixing plate 602 and the head 701 of the punch 7 is exposed. Then, use screws 604 to connect the upper template 601 and the T-shaped fixing plate 602. Then, install the mold shank 3, which is fixed to the upper template 601, onto the punch press slide 2. At the same time, fix the lower template 4 onto the punch press table 1, and install the lower mold pad 8, the fixing plate 9 with positioning pins 33, and the two dies 10 in sequence. Set two L-shaped stops 34 on the side of the lower template 4 for stripping the steel plate. Then, assemble the linkage mechanism, with support rod 11 and support rod 21... 2. Positioning rod 13 and positioning rod 2 are respectively fitted with housing 15, housing 26, housing 37 and housing 418. The four housings are cross-connected by connecting rod 19, connecting rod 20, connecting rod 321 and bearing 5 to form a four-bar linkage structure. Gear 124 meshes with gear 326, gear 427 meshes with gear 528, gear 225 meshes with gear 730, gear 629 meshes with gear 831 in each housing. Finally, a handwheel 32 is installed on housing 15 to drive connecting rod 19. When rotating, the gear system synchronously drives screw 122 and screw 23 to achieve precise linkage adjustment of the position of the double punches and complete the mold assembly.

[0017] During the steel plate stamping operation, the steel plate is first placed on the fixed plate 9, and the center hole of the steel plate is fitted onto the positioning stake 33 for center positioning. Then, the handwheel 32 is rotated clockwise to drive the connecting rod 19, gear 124, and gear 25 to rotate. The rotation of gear 124 drives gear 326 to rotate, and at the same time, the connecting rod 20 and gear 427 rotate together. The rotation of gear 427 drives gear 528 to rotate, and at the same time, the connecting rod 321 and gear 629 rotate together. Gear 25 and gear 629... Rotation simultaneously drives gears 7 (30) and 8 (31) to rotate. The rotation of gears 7 (30) and 8 (31) also drives screws 1 (22) and 2 (23) to move inward simultaneously. Continue rotating handwheel 32 until screws 1 (22) and 2 (23) simultaneously press against the steel plate. Then stop rotating handwheel 32. At this point, the positioning of the first steel plate in the same batch is complete. Next, adjust the height of punch 7 according to the thickness of the steel plate being processed. The adjustment parameters for different thicknesses are shown in the following figure (all height adjustments are based on the initial height): Table 1 Adjustment Parameters for Steel Plates of Different Specifications Product name Steel sheet thickness / mm Blind hole depth / mm Adjustment height / mm 952133 28 15 Up 13 752128 12 6 Up 6 752129 20 6 Up 14 752130 18 505 Up 12.5 After adjusting the punch height, manually turn on the punch press down switch to perform the steel plate stamping operation.

[0018] The above descriptions are merely embodiments of the present invention, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A steel plate punching double-sided die, characterized in that, The assembly includes a punch press table (1), a punch press slide (2), a die shank (3), a lower die plate (4), and several bearings (5). The die shank (3) is detachably connected to the punch press slide (2). An upper die fixing assembly (6) is provided at the end of the die shank (3) away from the punch press slide (2). Two punches (7) are provided inside the upper die fixing assembly (6). The lower die plate (4) is located on the punch press table (1). A lower die pad (8) is provided on the lower die plate (4). A fixing plate (9) is provided on the lower die pad (8). Two dies (10) are provided on the fixing plate (9). The two punches (7) are correspondingly arranged with the two dies (10). The template (4) is provided with support rod 1 (11), support rod 2 (12), positioning rod 1 (13) and positioning rod 2 (14). Support rod 1 (11) is provided with housing 1 (15), support rod 2 (12) is provided with housing 2 (16), positioning rod 1 (13) is provided with housing 3 (17), and positioning rod 2 (14) is provided with housing 4 (18). The horizontal and vertical directions of housing 1 (15) are respectively connected to connecting rod 1 (19) and connecting rod 2 (20) through bearings (5). The end of connecting rod 2 (20) away from housing 1 (15) is connected to housing 2 (16) through bearings (5). The longitudinal direction of the sleeve is connected to the connecting rod three (21) via bearing (5). The end of the connecting rod three (21) away from the sleeve two (16) is connected to the sleeve four (18) via bearing (5). The end of the connecting rod one (19) away from the sleeve one (15) is connected to the sleeve three (17) via bearing (5). The longitudinal direction of the sleeve three (17) is connected to the screw one (22) via bearing (5). The longitudinal direction of the sleeve four (18) is connected to the screw two (23) via bearing (5). The two ends of the connecting rod one (19) are respectively fixedly connected to the gear one (24) and the gear two (25). The two ends of the connecting rod two (20) are respectively fixedly connected to the gear one (24) and the gear two (25). Gear 3 (26) and gear 4 (27) are threaded through the connecting rod 3 (21). Gear 5 (28) and gear 6 (29) are fixedly threaded through the two ends of the connecting rod 3 (21). Gear 7 (30) is movably threaded through the screw 1 (22). Gear 8 (31) is movably threaded through the screw 2 (23). Gear 1 (24) meshes with gear 3 (26) inside the housing 1 (15). Gear 4 (27) meshes with gear 5 (28) inside the housing 2 (16). Gear 2 (25) meshes with gear 7 (30) inside the housing 3 (17). Gear 6 (29) meshes with gear 8 (31) inside the housing 4 (18).

2. The steel plate punching double-sided die according to claim 1, characterized in that, The upper mold fixing assembly (6) includes an upper template (601) and a T-shaped fixing plate (602). The T-shaped fixing plate (602) has two through holes (603). A screw (604) is provided between the upper template (601) and the T-shaped fixing plate (602). The upper template (601) and the T-shaped fixing plate (602) are detachably connected by the screw (604). The mold handle (3) is fixedly connected to the upper template (601).

3. A double-sided punching die for steel plates according to claim 2, characterized in that, The punch (7) consists of a head (701), a connecting block (702), and a limiting block (703). The head (701) is fixedly connected to the connecting block (702), and the connecting block (702) is fixedly connected to the limiting block (703). The head (701) is located outside the through hole (603), and the connecting block (702) and the limiting block (703) are both located inside the T-shaped fixing plate (602).

4. A double-sided punching die for steel plates according to claim 1, characterized in that, The fixing plate (9) is provided with a positioning stake (33), which is located at the center of the fixing plate (9).

5. A double-sided punching die for steel plates according to claim 1, characterized in that, The lower template (4) is provided with two L-shaped blocks (34), both of which are located on one side of the lower template pad (8) and the fixing plate (9).

6. A double-sided punching die for steel plates according to claim 3, characterized in that, The total length of the punch (7) is 60 mm, and the length of the head (701) is 18 mm.

7. A double-sided punching die for steel plates according to claim 1, characterized in that, The casing (15) is provided with a handwheel (32), one end of which is connected to the connecting rod (19).

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