A secondary punching buffering type automobile part punching device

Abstract

The application discloses a secondary stamping buffer type automobile part stamping device, and relates to the technical field of casting stamping forming, which comprises a machine tool assembly, a stamping forming unit is installed on the top surface of the machine tool assembly, the stamping forming unit comprises a stamping die and a forming die, a rigid fixed type profiling stamping tool is fixed through cooperation of a front buffer pressing structure of an elastic floating assembly and a profiling pressing plate, a differentiated secondary stamping timing effect of a profiled aluminum casting shell stamping and trimming process is realized, flexible primary buffer pressing is completed by using the elastic floating assembly to drive the profiling pressing plate, no-impact profiling lamination pre-fixing of the profiled aluminum casting shell is realized, defects of easy edge collapse, collapse and deformation of a die-casting profiled thin-wall shell are effectively avoided, and rigid secondary trimming and excess material removing are completed by using the fixed profiling stamping tool after the pressing plate is compacted and stabilized, and the problems of damaged parts caused by high-speed trimming, low efficiency caused by low-speed trimming and poor consistency of finished products in a conventional single stamping mode are solved.

Description

Technical Field

[0001] This invention belongs to the field of casting stamping technology, specifically a buffer-type stamping device for automotive parts with secondary stamping. Background Technology

[0002] A large number of irregularly shaped shell-like aluminum castings exist in the automotive parts industry. These parts are mainly formed in one piece through die casting, offering advantages such as light weight, high structural strength, and good formability. They are widely used in automotive bodies, chassis, and onboard functional assembly. Due to the characteristics of the die casting process, irregularly shaped shell-like aluminum castings inevitably have irregular die casting residue, flash, and burrs on their outer contours after die casting. These defects cannot directly meet the dimensional accuracy and appearance quality requirements of automotive parts. Therefore, die-cast shell-like aluminum castings must undergo a stamping and trimming process to neatly remove excess material from the edges.

[0003] The existing equipment uses rigid stamping throughout the entire process. There is no buffer pre-pressing process in the initial stage of stamping. The punching cutter directly impacts the thin-walled irregular aluminum casting blank, which can easily lead to workpiece chipping, surface collapse, and shell deformation, seriously damaging the workpiece structure and appearance, resulting in a low yield rate. On the other hand, a low-speed stamping method is adopted throughout the process to avoid workpiece damage. Although it can reduce stamping impact and workpiece damage, the punching stroke time is greatly increased, the production cycle is slow, and it cannot meet the efficiency requirements of industrial mass production. Summary of the Invention

[0004] To address the problems mentioned in the background art, the present invention proposes a buffer-type stamping device for secondary stamping of automotive parts.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A secondary stamping buffer-type automotive parts stamping device includes a machine tool assembly, a stamping forming unit is mounted on the top surface of the machine tool assembly, the stamping forming unit includes a stamping die and a forming die, and a lifting unit is provided on the machine tool assembly to drive the stamping die to rise and fall.

[0007] The stamping die includes:

[0008] The top plate is installed on the lifting unit;

[0009] A stamping die, installed on the bottom surface of the upper plate, is used to stamp the die-casting residue on the edges of automotive parts;

[0010] A contouring pressure plate is arranged below the upper top plate and its initial position is lower than the stamping die. An elastic floating component is provided between the contouring pressure plate and the upper top plate. The elastic floating component is used to cushion the automotive parts before stamping.

[0011] The forming die is located below the stamping die, and the forming die includes:

[0012] The base is fixedly installed on the top surface of the machine tool assembly;

[0013] The contoured support block can be detachably installed on the base.

[0014] As a further preferred embodiment of this technical solution: a bracket is fixedly mounted on the machine tool assembly, and a maximum stroke limiting unit is installed on the bracket. The maximum stroke limiting units are arranged symmetrically in pairs and arrayed on both sides of the contour pressure plate. Each group of the maximum stroke limiting units includes:

[0015] An extension frame is fixedly connected to a contoured pressure plate, and a locking block is fixedly connected to the extension frame.

[0016] A positioning sleeve is mounted on the bracket, and the extension frame is correspondingly mounted on the inner side of the positioning sleeve.

[0017] As a further preferred embodiment of this technical solution: the elastic floating component includes:

[0018] Two sliding shafts are provided, and a guide groove is provided on the upper top plate. The sliding shafts are correspondingly slidably disposed inside the guide groove.

[0019] Compression springs are respectively sleeved on the outside of each of the sliding shafts, and a limiting block is fixedly installed on each of the sliding shafts. One end of the compression spring is fixedly connected to the limiting block, and the other end of the compression spring is fixedly connected to the upper top plate.

[0020] As a further preferred embodiment of this technical solution: the stamping die includes:

[0021] A connecting seat is fixedly connected to the bottom surface of the upper top plate, and the bottom of the connecting seat is connected to a mounting base via a fixing post;

[0022] The profile stamping tool is set on the bottom surface of the mounting base.

[0023] As a further preferred embodiment of this technical solution: the mounting base is provided with a clearance groove, and the sliding shaft is located inside the clearance groove.

[0024] As a further preferred embodiment of this technical solution: the lifting unit includes:

[0025] The machine tool assembly has a gantry frame on its top surface, the slide rail is mounted on the gantry frame, and a slider is slidably mounted on the slide rail, with a drive seat fixedly connected to the slider.

[0026] A cylinder is mounted on a gantry frame. The output end of the cylinder is fixedly connected to the drive base, and the upper top plate is fixedly connected to the drive base.

[0027] As a further preferred embodiment of this technical solution: the base is provided with mounting slots, and each mounting slot is provided with lifting components evenly distributed inside, each lifting component including:

[0028] The rotating shaft is rotatably mounted on the inner wall of the mounting slot;

[0029] The lifting block is fixedly mounted on the rotating shaft;

[0030] A lifting spring is arranged inside the mounting groove, with one end of the lifting spring fixedly connected to the lifting block and the other end of the lifting spring fixedly connected to the inner bottom wall of the mounting groove.

[0031] As a further preferred embodiment of this technical solution: four notches that communicate with the mounting groove are respectively provided on both sides of the contoured support block, and four mounting grooves are also provided accordingly.

[0032] As a further preferred embodiment of this technical solution: the initial state of the lifting block is an inclined state, and the end of the lifting block near the notch is gradually inclined downward towards the end extending in the direction of the mounting groove.

[0033] As a further preferred embodiment of this technical solution: the profile stamping tool, the profile pressure plate, and the profile support block have the same shape, and when different automotive parts are replaced, the profile stamping tool, the profile pressure plate, and the profile support block are adapted to the adjusted shape, and the outer contour dimensions of the profile pressure plate are consistent with those of the profile support block, and the inner wall contour dimension of the profile stamping tool is larger than the outer contour dimensions of the profile pressure plate and the profile support block.

[0034] Compared with the prior art, the beneficial effects of the present invention are:

[0035] 1. In this invention, by combining the elastic floating component with the pre-buffered pressing structure of the contouring pressure plate and the rigid fixed contouring stamping tool, a differentiated secondary stamping sequence effect is achieved in the stamping and trimming process of irregular aluminum casting shells. First, the elastic floating component drives the contouring pressure plate to complete a flexible first-stage buffer pressing, achieving non-impact contouring and pre-fixing of the irregular aluminum casting shell, effectively avoiding the defects of easy edge chipping, collapse, and deformation of die-cast irregular thin-walled shells. After the pressure plate is compacted and stabilized, the rigid secondary punching and material removal operation is completed by the fixedly arranged contouring stamping tool, solving the problems of high-speed punching damage, low-speed punching efficiency, and poor product consistency in the conventional single stamping mode.

[0036] 2. In this invention, the conical structure with a larger upper part and a smaller lower part, along with the rounded corners of the positioning sleeve, provides a limiting mechanism. When the contoured pressure plate is pressed down to the rated clamping force threshold, it is precisely limited and stopped from falling. This effectively prevents the instantaneous overload pressure caused by the continuous downward movement of the lifting unit from damaging the thin-walled shell workpiece.

[0037] 3. In this invention, during the pressing and compression stage of stamping, the workpiece clamping force can automatically drive the lifting block to rotate and be stored inside the mounting groove, ensuring that the irregular aluminum casting shell is completely in contact with the positioning surface of the conforming support block, ensuring the positioning accuracy and structural stability of the rigid punching process, and will not interfere with the stamping forming effect. After stamping is completed and the pressure plate is depressurized and reset, the lifting spring can automatically release elastic potential energy as the pressure is removed, and link multiple lifting blocks to lift synchronously and evenly, automatically lifting the tightly attached automotive parts as a whole away from the positioning structure. The entire process relies on the timing linkage of stamping pressure to achieve automatic lifting and unloading, without the need for manual prying and separation, solving the problems of adsorption and jamming after stamping of irregular shells, difficulty in removing parts, and easy scratching and deformation during removal. Attached Figure Description

[0038] Figure 1 This is a three-dimensional structural diagram of a buffer-type automotive parts stamping device for secondary stamping according to the present invention.

[0039] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0040] Figure 3 This is a schematic diagram of the lifting unit in a buffer-type automotive parts stamping device for secondary stamping according to the present invention.

[0041] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0042] Figure 5 This is a partial exploded view of the stamping unit in a buffer-type automotive parts stamping device for secondary stamping according to the present invention.

[0043] Figure 6 This is a schematic diagram of the maximum stroke limiting unit in a buffer-type automotive parts stamping device for secondary stamping according to the present invention;

[0044] Figure 7 This is a schematic diagram of the forming die in a buffer-type automotive parts stamping device for secondary stamping according to the present invention.

[0045] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0046] Figure 9 This is a partial cross-sectional view of the base in a secondary stamping buffer-type automotive parts stamping device according to the present invention.

[0047] Legend: 1. Machine tool assembly; 2. Stamping unit; 21. Top plate; 211. Guide slide; 22. Elastic floating component; 221. Slide shaft; 222. Limiting block; 223. Compression spring; 23. Stamping die; 231. Connecting seat; 232. Fixed column; 233. Mounting seat; 234. Clearance groove; 235. Contouring stamping tool; 24. Contouring pressure plate; 25. Base; 26. Contouring support block; 261. Notch; 27. Lifting component; 271. Rotary shaft; 272. Lifting block; 273. Lifting spring; 28. Mounting groove; 3. Lifting unit; 31. Slide rail; 32. Slider; 33. Drive seat; 34. Cylinder; 4. Maximum stroke limiting unit; 41. Extension frame; 42. Locking block; 43. Positioning sleeve; 5. Bracket. Detailed Implementation

[0048] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] Please see Figures 1-9 This application provides a secondary stamping buffer type automotive parts stamping device, including a machine tool assembly 1, a stamping forming unit 2 installed on the top surface of the machine tool assembly 1, the stamping forming unit 2 including a stamping die and a forming die, and a lifting unit 3 for driving the stamping die to rise and fall on the machine tool assembly 1.

[0050] The stamping die includes:

[0051] The top plate 21 is installed on the lifting unit 3 and serves to bear the load. It is used to install the elastic floating component 22 and the stamping die 23.

[0052] The stamping die 23 is installed on the bottom surface of the upper top plate 21 and is used to stamp the die-casting residue on the edge of the automotive parts;

[0053] The contouring pressure plate 24 is arranged below the upper top plate 21 and its initial position is lower than the stamping die 23. An elastic floating component 22 is provided between the contouring pressure plate 24 and the upper top plate 21. The elastic floating component 22 is used to cushion the automotive parts before stamping. On the one hand, it can ensure the stability of the automotive parts during the stamping process. On the other hand, it uses its elasticity to avoid hard contact with the automotive parts and cause damage.

[0054] The forming die is located below the stamping die, and the forming die includes:

[0055] The base 25 is fixedly installed on the top surface of the machine tool assembly 1;

[0056] The contour support block 26 is detachably mounted on the base 25. The automotive parts are positioned by fitting them onto the contour support block 26, and the contour support block 26 can be selected to fit the shape of the processed shell-shaped automotive parts.

[0057] Specifically, the automotive parts are positioned on the contour block 26. It should be noted that the automotive parts used in this equipment are specific die-cast aluminum casting shells. During the die-casting process, there will be excess material at the edges, which needs to be stamped. Therefore, after the automotive parts are placed on the contour block 26, the lifting unit 3 drives the stamping die to move down and stamp the automotive parts on the contour block 26. During this process, the contour plate 24 first presses on the top surface of the automotive parts to form a clamp. Since the elastic floating component 22 has an elastic floating function, it can play a buffering role. This process is a first buffer press. Afterwards, the contour plate 24 is retracted into the inner area of ​​the stamping die 23. At the same time, the stamping die 23 is not affected during the first buffer press stage. Therefore, during the second stamping process, the stamping die 23 quickly stamps away the excess material around the automotive parts.

[0058] Furthermore, a bracket 5 is fixedly installed on the machine tool assembly 1, and a maximum stroke limiting unit 4 is installed on the bracket 5. The maximum stroke limiting units 4 are arranged symmetrically in pairs and arrayed on both sides of the contour pressure plate 24. Each group of the maximum stroke limiting units 4 includes:

[0059] An extension frame 41 is fixedly connected to a contour pressure plate 24, and a locking block 42 is fixedly connected to the extension frame 41.

[0060] The positioning sleeve 43 is set on the bracket 5. It should be noted that the positioning sleeve 43 and the extension frame 41 are separate. Its height can be adapted to the thickness of the stamped parts. The extension frame 41 is correspondingly set on the inner side of the positioning sleeve 43. It should also be noted that the contact surface between the positioning sleeve 43 and the slider 32 is rounded. The locking block 42 is a cone with a larger top and a smaller bottom.

[0061] Specifically, during the downward pressing process, the contour plate 24 descends and drives the extension frame 41 on it to descend and move inside the positioning sleeve 43. The extension frame 41 drives the locking block 42 to descend. When the contour plate 24 applies the rated maximum pressing force to the top surface of the automotive parts, the locking block 42 is just blocked by the positioning sleeve 43 and cannot descend. This can prevent damage to the automotive parts caused by instantaneous pressure overload during the descent process driven by the lifting unit 3.

[0062] Furthermore, the elastic floating component 22 includes:

[0063] Two sliding shafts 221 are provided, and a guide groove 211 is provided on the upper top plate 21. The sliding shafts 221 are correspondingly slidably arranged inside the guide groove 211.

[0064] Compression springs 223 are respectively sleeved on the outside of each of the sliding shafts 221, and each of the sliding shafts 221 is fixedly provided with a limiting block 222. One end of the compression spring 223 is fixedly connected to the limiting block 222, and the other end of the compression spring 223 is fixedly connected to the upper top plate 21.

[0065] Specifically, during the stamping process, the profiled pressure plate 24 first presses onto the top surface of the automotive part, and under the effect of the continuous force applied by the lifting unit 3, the sliding shaft 221 slides upward relative to the guide groove 211 and squeezes the compression spring 223 under the action of the limiting block 222. The compression spring 223 contracts, and then applies pressure to the automotive part through the reverse force of the compression spring 223, preventing it from moving during the stamping process. Moreover, it can automatically apply pressure and limit the position before stamping without the need for repeated manual calibration.

[0066] Furthermore, the stamping die 23 includes:

[0067] The connecting seat 231 is fixedly connected to the bottom surface of the upper top plate 21, and the bottom of the connecting seat 231 is connected to the mounting seat 233 through the fixing post 232;

[0068] The profile stamping tool 235 is set on the bottom surface of the mounting base 233.

[0069] Furthermore, the mounting base 233 is provided with a relief groove 234, and the sliding shaft 221 is located inside the relief groove 234, which can prevent the compression spring 223 from affecting the travel trajectory of the sliding shaft 221.

[0070] Furthermore, the lifting unit 3 includes:

[0071] The slide rail 31 is provided on the top surface of the machine tool assembly 1. A gantry frame is provided on the slide rail 31, and a slider 32 is slidably provided on the slide rail 31. A drive seat 33 is fixedly connected to the slider 32.

[0072] Cylinder 34 is mounted on the gantry frame. The output end of cylinder 34 is fixedly connected to drive base 33, and the upper top plate 21 is fixedly connected to drive base 33.

[0073] Specifically, the cylinder 34 drives the drive seat 33 to descend, and under the limiting and guiding action of the slide rail 31 and the slider 32, it slides downward, always keeping the stamping die and the forming die center aligned vertically. The drive seat 33 descends, which in turn drives the elastic floating component 22 on the upper plate 21 and the stamping die 23 to descend and stamp the automotive parts above the forming die.

[0074] Furthermore, the base 25 is provided with mounting slots 28, and each mounting slot 28 is provided with lifting components 27 evenly distributed inside, each lifting component 27 including:

[0075] The rotating shaft 271 is rotatably mounted on the inner wall of the mounting groove 28;

[0076] The lifting block 272 is fixedly mounted on the rotating shaft 271;

[0077] A lifting spring 273 is arranged inside the mounting groove 28, with one end of the lifting spring 273 fixedly connected to the lifting block 272 and the other end of the lifting spring 273 fixedly connected to the inner bottom wall of the mounting groove 28.

[0078] Specifically, the car parts are first inverted onto the contour block 26. The shape of the contour block 26 matches the shape of the car parts to achieve positioning and installation. However, in the initial state, the car parts are initially pushed down by the lifting spring 273 through the lifting block 272. When the contour plate 24 presses down on the top of the car parts, the lifting spring 273 is compressed, and the lifting block 272 rotates around the pivot 271 and retracts into the mounting groove 28, achieving flush with the base 25. This allows the car parts to fit well onto the contour block 26. After stamping, the pressure on the car parts is removed, and the lifting spring 273 releases its elastic potential energy to lift the lifting block 272 back to its original position. The lifting block 272 also lifts the car parts off the contour block 26. This avoids the problem of the car parts being tightly attached to the contour block 26 due to stamping, which would result in few stress points and require a lot of force to separate them. This solution can automatically lift the car parts, making it more convenient.

[0079] Furthermore, four notches 261 that communicate with the mounting grooves 28 are respectively provided on both sides of the contour support block 26. By providing notches 261, the lifting block 272 can be raised higher than the lowest point of the car parts attached to the contour support block 26, so that the car parts can be lifted. Correspondingly, four mounting grooves 28 are also provided, two on each side, forming a multi-point equal force support. During the process of lifting the car parts, the four symmetrical support points are simultaneously subjected to force, avoiding the problem of tilting and getting stuck.

[0080] Furthermore, the initial state of the lifting block 272 is an inclined state, and the end of the lifting block 272 near the notch 261 is gradually inclined downward towards the end extending in the direction of the mounting groove 28.

[0081] Furthermore, the profile stamping tool 235, the profile pressure plate 24, and the profile support block 26 have the same shape, and when different automotive parts are replaced, the profile stamping tool 235, the profile pressure plate 24, and the profile support block 26 are adapted to adjust their shapes. The outer contour dimensions of the profile pressure plate 24 are consistent with those of the profile support block 26, and the inner wall contour dimension of the profile stamping tool 235 is larger than the outer contour dimensions of the profile pressure plate 24 and the profile support block 26.

[0082] The above embodiments are only used to illustrate the technical methods of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of the present invention without departing from the spirit and scope of the technical methods of the present invention.

Claims

1. A buffer-type stamping device for secondary stamping of automotive parts, comprising a machine tool assembly (1), characterized in that: The machine tool assembly (1) is equipped with a stamping forming unit (2) on its top surface. The stamping forming unit (2) includes a stamping die and a forming die. The machine tool assembly (1) is also provided with a lifting unit (3) that drives the stamping die to rise and fall. The stamping die includes: The top plate (21) is installed on the lifting unit (3); The stamping die (23) is installed on the bottom surface of the upper plate (21) and is used to stamp the die-casting residue on the edge of the automotive parts; A contouring pressure plate (24) is arranged below the upper top plate (21) and its initial position is lower than the stamping die (23). An elastic floating component (22) is provided between the contouring pressure plate (24) and the upper top plate (21). The elastic floating component (22) is used to cushion the automotive parts before stamping. The forming die is located below the stamping die, and the forming die includes: The base (25) is fixedly installed on the top surface of the machine tool assembly (1); The contour support block (26) is detachably mounted on the base (25).

2. The buffer-type stamping device for secondary stamping of automotive parts according to claim 1, characterized in that, A bracket (5) is fixedly mounted on the machine tool assembly (1), and a maximum stroke limiting unit (4) is installed on the bracket (5). The maximum stroke limiting units (4) are arranged symmetrically in pairs and arrayed on both sides of the contour pressure plate (24). Each set of the maximum stroke limiting units (4) includes: An extension frame (41) is fixedly connected to a contour plate (24), and a locking block (42) is fixedly connected to the extension frame (41). The positioning sleeve (43) is set on the bracket (5), and the extension frame (41) is correspondingly set on the inner side of the positioning sleeve (43).

3. The buffer-type stamping device for secondary stamping of automotive parts according to claim 1, characterized in that, The elastic floating component (22) includes: Two sliding shafts (221) are provided, and a guide groove (211) is provided on the upper top plate (21). The sliding shafts (221) are correspondingly slidably arranged inside the guide groove (211). Compression springs (223) are respectively sleeved on the outside of each of the sliding shafts (221), and each of the sliding shafts (221) is fixedly provided with a limiting block (222). One end of the compression spring (223) is fixedly connected to the limiting block (222), and the other end of the compression spring (223) is fixedly connected to the upper top plate (21).

4. The buffer-type stamping device for secondary stamping of automotive parts according to claim 3, characterized in that, The stamping die (23) includes: The connecting seat (231) is fixedly connected to the bottom surface of the upper top plate (21), and the bottom of the connecting seat (231) is connected to the mounting seat (233) through the fixing column (232). A profile stamping tool (235) is set on the bottom surface of the mounting base (233).

5. A buffer-type stamping device for secondary stamping of automotive parts according to claim 4, characterized in that, The mounting base (233) has a clearance groove (234), and the sliding shaft (221) is located inside the clearance groove (234).

6. The buffer-type stamping device for secondary stamping of automotive parts according to claim 1, characterized in that, The lifting unit (3) includes: The slide rail (31) is provided on the top surface of the machine tool assembly (1). The slide rail (31) is provided on the gantry, and a slider (32) is slidably provided on the slide rail (31). A drive seat (33) is fixedly connected to the slider (32). A cylinder (34) is mounted on a gantry frame. The output end of the cylinder (34) is fixedly connected to the drive seat (33), and the upper top plate (21) is fixedly connected to the drive seat (33).

7. The buffer-type stamping device for secondary stamping of automotive parts according to claim 1, characterized in that, The base (25) has a mounting slot (28), and each mounting slot (28) is provided with a lifting component (27) evenly distributed inside. Each lifting component (27) includes: The rotating shaft (271) is rotatably mounted on the inner wall of the mounting groove (28); The lifting block (272) is fixedly mounted on the rotating shaft (271); A lifting spring (273) is arranged inside the mounting groove (28), and one end of the lifting spring (273) is fixedly connected to the lifting block (272), and the other end of the lifting spring (273) is fixedly connected to the inner bottom wall of the mounting groove (28).

8. A buffer-type stamping device for secondary stamping of automotive parts according to claim 7, characterized in that, The contoured support block (26) has four slots (261) on each side that are connected to the mounting slot (28), and the mounting slot (28) also has four slots.

9. A buffer-type stamping device for secondary stamping of automotive parts according to claim 7, characterized in that, The initial state of the lifting block (272) is inclined, and the end of the lifting block (272) near the notch (261) is gradually inclined downward towards the end extending in the direction of the mounting groove (28).

10. A buffer-type stamping device for secondary stamping of automotive parts according to claim 4, characterized in that, The contour stamping tool (235), the contour pressure plate (24) and the contour support block (26) have the same shape, and the outer contour dimensions of the contour pressure plate (24) are consistent with those of the contour support block (26). The inner wall contour dimension of the contour stamping tool (235) is larger than the outer contour dimensions of the contour pressure plate (24) and the contour support block (26).

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