An automobile plate stamping device

Abstract

The utility model discloses a kind of automobile plate stamping devices, belong to automobile plate processing equipment field, solve the problem that existing device height adjustment is complicated, low precision, poor adaptability. The device includes L-shaped support, height adjusting mechanism, stamping mechanism and processing table;Height adjusting mechanism contains branch plate, T-shaped guide slot, T-shaped guide block, speed reducer, screw rod and T-shaped mounting seat, stamping mechanism contains cylinder, horizontal plate, punch mounting seat and guide rod. Through speed reducer drive screw rod drive T-shaped mounting seat and stamping mechanism along T-shaped guide slot movement, realize stamping height automatic accurate regulation;Guide rod and linear bearing cooperation guarantee stamping stability, rubber shock pad reduces vibration, polytetrafluoroethylene wear-resistant coating prolongs life. The device is easy to operate, can be adapted to 0.6-5mm and above thickness plate and various stamping processes, improve processing applicability and production efficiency, reduce scrap rate, suitable for automobile plate batch processing.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive sheet metal processing equipment, specifically to a height-adjustable stamping device for automotive sheet metal stamping. Background Technology

[0002] In automobile manufacturing, the stamping of automotive sheet metal is one of the key processes, involving the production of various components such as body panels and structural parts. Different types of automotive sheet metal vary significantly in thickness; for example, the thickness of outer body panels is typically 0.6-1.2 mm, while the thickness of chassis structural parts can reach 2-5 mm. At the same time, different stamping processes (such as shallow drawing, deep drawing, punching, and trimming) also place significant differences in the height requirements of the stamping mechanism.

[0003] Most existing automotive sheet metal stamping equipment uses a fixed-height stamping structure. Once the equipment is installed and debugged, the distance between the stamping mechanism and the processing table cannot be adjusted, limiting its applicability to single-thickness sheet metal or single stamping process. Other equipment relies on manual adjustment of the stamping height. This requires stopping the machine and adjusting by rotating screws or adding / removing shims, a cumbersome and time-consuming process that struggles to precisely control height deviations, typically achieving only millimeter-level accuracy. This manual adjustment method not only reduces production efficiency but also easily leads to stamping dimensional deviations, sheet metal deformation, or even scrap due to improper height adjustment, failing to meet the high-precision processing requirements of automotive sheet metal and severely limiting the equipment's applicability and production quality. Utility Model Content

[0004] The purpose of this utility model is to provide an automotive sheet metal stamping device to solve the problems of cumbersome height adjustment, low precision, and poor adaptability of existing devices, so as to realize automatic and precise adjustment of stamping height and adapt to sheet metal of different thicknesses and different stamping process requirements.

[0005] The automotive sheet metal stamping device includes an L-shaped bracket, on which a stamping mechanism is mounted via a height adjustment mechanism. A processing table is also mounted on the L-shaped bracket, located directly below the stamping mechanism, for placing automotive sheet metal to be processed.

[0006] The height adjustment mechanism includes a support plate fixed to an L-shaped bracket. The support plate is horizontally positioned and has a pair of T-shaped guide grooves. These grooves are parallel to each other along the length of the support plate. Each T-shaped guide groove contains a pair of T-shaped guide blocks that can slide along the length of the groove. A geared motor is also mounted on the support plate. The output shaft of the geared motor extends along the length of the support plate, and a lead screw is fixed to the output shaft. The lead screw is coaxial with the output shaft of the geared motor. T-shaped mounting seats are fixed between the four T-shaped guide blocks. The bottom of the T-shaped mounting seats is fixedly connected to the top of the four T-shaped guide blocks. The T-shaped mounting seats have threaded holes that match the lead screw. The T-shaped mounting seats are threadedly connected to the lead screw through the threaded holes. When the lead screw rotates, it can drive the T-shaped mounting seats to move along the length of the T-shaped guide grooves.

[0007] The stamping mechanism includes a cylinder and a horizontal plate fixed on a T-shaped mounting base. The cylinder is set vertically downwards, and the horizontal plate is horizontally located outside the cylinder. A punch mounting base is fixed to the bottom end of the piston rod of the cylinder. The punch mounting base is used to install different types of stamping punches. A pair of guide rods are slidably connected to the horizontal plate. The pair of guide rods are symmetrically distributed along the axis of the cylinder. The guide rods are set vertically, and the bottom ends of the two guide rods are fixedly connected to the two ends of the top of the punch mounting base, respectively. The guide rods can slide along the thickness direction of the horizontal plate.

[0008] To further improve the stability and service life of the device, the fit clearance between the T-shaped guide block and the T-shaped guide groove is 0.02-0.05mm. This clearance setting can ensure the smooth sliding of the T-shaped guide block while avoiding shaking during the sliding process. The outer surface of the T-shaped guide block is coated with a wear-resistant coating with a thickness of 0.01-0.03mm. The wear-resistant coating is a polytetrafluoroethylene (PTFE) coating. PTFE coating has excellent wear resistance and self-lubricating properties, which can reduce frictional loss between the T-shaped guide block and the T-shaped guide groove and extend the service life of the components.

[0009] The geared motor is fixed to the support plate by at least four countersunk bolts. The axis of the countersunk bolts is perpendicular to the upper surface of the support plate. The countersunk bolts can prevent the bolt heads from protruding and affecting the movement of other parts. A rubber shock-absorbing pad with a thickness of 2-5mm is set between the housing of the geared motor and the support plate. The rubber shock-absorbing pad is sleeved on the outside of the countersunk bolts. The rubber shock-absorbing pad can absorb the vibration generated by the geared motor during operation, prevent the vibration from being transmitted to the support plate and other parts, and ensure the accuracy of height adjustment and stamping.

[0010] The horizontal plate has a guide hole that matches the guide rod. A linear bearing is embedded in the inner wall of the guide hole. The inner ring of the linear bearing slides and fits against the outer surface of the guide rod. The linear bearing can convert the sliding friction between the guide rod and the guide hole into rolling friction, reduce frictional resistance, and ensure smooth sliding of the guide rod. The two ends of the linear bearing are flush with the upper and lower surfaces of the horizontal plate, which can prevent the linear bearing from protruding and affecting the installation or movement of the components.

[0011] The threaded connection between the lead screw and the T-shaped mounting base is a trapezoidal thread with a tooth angle of 30°. The trapezoidal thread features high transmission efficiency, strong load-bearing capacity, and stable precision, ensuring stable transmission between the lead screw and the T-shaped mounting base. An anti-loosening nut is provided on the side of the T-shaped mounting base away from the geared motor. The anti-loosening nut is threadedly connected to the lead screw, and the end face of the anti-loosening nut is in close contact with the side of the T-shaped mounting base. The anti-loosening nut prevents the T-shaped mounting base from shifting due to vibration during the stamping process, ensuring stable stamping height.

[0012] Height Adjustment Principle: When the stamping height needs to be adjusted according to the thickness of the automotive sheet metal or the stamping process, the geared motor is started. The output shaft of the geared motor drives the lead screw to rotate around its own axis. Since the T-shaped mounting seat is threadedly connected to the lead screw through a threaded hole, and the bottom of the T-shaped mounting seat slides against the T-shaped guide groove on the support plate through a T-shaped guide block, the T-shaped guide groove restricts the rotation of the T-shaped mounting seat with the lead screw. Therefore, the rotational motion of the lead screw is converted into linear motion of the T-shaped mounting seat along the length of the T-shaped guide groove. By controlling the forward and reverse rotation of the geared motor, the up and down movement of the T-shaped mounting seat can be realized (here, "up and down" corresponds to the height direction of the stamping mechanism relative to the processing table). The stamping mechanism, fixed on the T-shaped mounting base, moves synchronously to adjust the stamping height. The geared motor can be precisely controlled by an external controller to adjust the number of rotations and speed. Combined with the lead screw pitch (e.g., setting the lead screw pitch to 1mm, the T-shaped mounting base moves 1mm for every 1 rotation of the geared motor), the stamping height can be precisely adjusted to an accuracy of 0.01mm. After the stamping height is adjusted to the target position, tighten the anti-loosening nut on the side of the T-shaped mounting base so that the end face of the anti-loosening nut is in close contact with the side of the T-shaped mounting base. The friction between the anti-loosening nut and the lead screw restricts the movement of the T-shaped mounting base, ensuring height stability during the stamping process.

[0013] Stamping Working Principle: The automotive sheet metal to be processed is placed in the designated position on the processing table (the sheet metal can be positioned using positioning blocks or positioning slots on the processing table). The cylinder of the stamping mechanism is activated, and the piston rod of the cylinder extends downward under air pressure, driving the punch mounting seat and the punch on the punch mounting seat, which are fixed at the bottom of the piston rod, to move downward synchronously. After the punch contacts the automotive sheet metal, it continues to apply downward pressure to complete the stamping process of the sheet metal (such as punching, stretching, forming, etc.). During the movement of the punch mounting seat, the guide rods fixed at both ends of its top slide synchronously along the linear bearings in the guide holes of the horizontal plate. The linear bearings ensure the sliding accuracy and smoothness of the guide rods, while the guide rods limit the lateral displacement of the punch mounting seat, preventing the punch from tilting or shifting during the stamping process and ensuring the stamping dimensional accuracy. After the stamping is completed, the piston rod of the control cylinder retracts, driving the punch mounting seat and the punch to return to their original position, and the processed sheet metal is removed, completing one stamping cycle.

[0014] Beneficial effects

[0015] The filter screen is easy to install and remove, and has high cleaning efficiency: Through the cooperation of the limiting mechanism and the slot, the filter screen can be quickly installed and removed without tools. During installation, simply insert the rectangular frame and it will be automatically locked in place by the spring. During disassembly, simply press the limiting head to pull it out. The operation is simple and convenient, which greatly shortens the filter screen installation and removal time, increases the user's enthusiasm for cleaning the filter screen, and ensures the filtration effect of the filter screen.

[0016] Excellent heat dissipation performance and high safety in use: The air guide cavity runs horizontally through the double charging base and the electronic components do not block the air guide cavity, ensuring smooth airflow; the rubber sealing gasket between the blower and the air guide cavity prevents air leakage from gaps, improving heat dissipation efficiency; the heat insulation sleeve prevents the heat of the electronic components from being directly transferred to the outer wall of the air guide cavity, while the high-temperature resistant and corrosion-resistant coating extends the service life of the heat insulation sleeve; the combination of temperature sensor and indicator light can provide real-time feedback on the internal temperature of the air guide cavity, making it easy for users to detect heat dissipation abnormalities in a timely manner and improving the safety of equipment use. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the height adjustment mechanism of this utility model;

[0020] Figure 3 This is a cross-sectional view of the height adjustment mechanism of this utility model;

[0021] Figure 4 This is a schematic diagram of the stamping mechanism of this utility model;

[0022] Figure 5 This is a schematic diagram of the stamping mechanism of this utility model;

[0023] In the picture:

[0024] 1-L-type bracket, 2-height adjustment mechanism, 21-support plate, 22-T-type guide groove, 23-T-type guide block, 24-gear motor, 25-lead screw, 26-T-type mounting base, 3-stamping mechanism, 31-cylinder, 32-horizontal plate, 33-punch mounting base, 34-guide rod, 4-processing table. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figure 1-5 As shown;

[0027] An automotive sheet metal stamping device.

[0028] This implementation plan addresses the technical problems existing in the prior art, such as those disclosed in the background section above: "Most existing automotive sheet metal stamping devices employ a fixed-height stamping structure. Once the equipment is installed and debugged, the distance between the stamping mechanism and the processing table cannot be adjusted, limiting its applicability to single-thickness sheet metal or single stamping process. Some devices rely on manual adjustment of the stamping height, requiring the machine to be stopped before adjustment via rotating screws or adding / removing shims. This cumbersome process is time-consuming and makes precise height control difficult, with adjustment accuracy typically only reaching millimeter levels. This manual adjustment method not only reduces production efficiency but also easily leads to stamping dimensional deviations, sheet metal deformation, or even scrap due to improper height adjustment, failing to meet the high-precision processing requirements of automotive sheet metal and severely limiting the device's processing applicability and production quality." In practical terms, this problem is clearly real and difficult to solve. Therefore, to address this technical problem, an automotive sheet metal stamping device is provided.

[0029] Example 1

[0030] like Figure 1-5 As shown in the figure;

[0031] The automobile sheet metal stamping device disclosed in this utility model includes an L-shaped bracket 1. The L-shaped bracket 1 is equipped with a stamping mechanism 3 through a height adjustment mechanism 2. A processing table 4 is also provided on the L-shaped bracket 1. The processing table 4 is fixed to the top of the horizontal end of the L-shaped bracket 1 by bolts, and the processing table 4 is located directly below the stamping mechanism 3. Two symmetrical positioning blocks are provided on the top of the processing table 4 for positioning the automobile sheet metal to be processed.

[0032] The height adjustment mechanism 2 includes a support plate 21 fixed to the top of the vertical end of the L-shaped bracket 1. The support plate 21 is fixedly connected to the L-shaped bracket 1 by welding. A pair of T-shaped guide grooves 22 are provided on the support plate 21. The pair of T-shaped guide grooves 22 are distributed parallel to each other along the length direction of the support plate 21, and the length of the T-shaped guide groove 22 is 2 / 3 of the length of the support plate 21. Each T-shaped guide groove 22 is provided with a pair of T-shaped guide blocks 23. The size of the T-shaped guide blocks 23 is adapted to the T-shaped guide groove 22, and the T-shaped guide blocks 23 can slide along the length direction of the T-shaped guide groove 22. The fitting clearance between the T-shaped guide blocks 23 and the T-shaped guide groove 22 is 0.03mm. The outer surface of the T-shaped guide blocks 23 is coated with a wear-resistant coating with a thickness of 0.02mm. The wear-resistant coating is a polytetrafluoroethylene coating, and the coating method is spraying followed by curing.

[0033] A geared motor 24 is also installed on the support plate 21. The geared motor 24 is a 42 stepper motor (step angle 1.8°, reduction ratio 1:10). The geared motor 24 is fixed to the top of one end of the support plate 21 by four countersunk bolts. The axis of the countersunk bolts is perpendicular to the upper surface of the support plate 21. The specifications of the countersunk bolts are M8×20. A 3mm thick rubber shock-absorbing pad is installed between the housing of the geared motor 24 and the support plate 21. The rubber shock-absorbing pad is sleeved on the outside of the countersunk bolts. The rubber shock-absorbing pad is made of nitrile rubber, which has good shock absorption performance and wear resistance.

[0034] The output shaft of the geared motor 24 is fixed to a lead screw 25 via a coupling. The lead screw 25 is made of 45# steel and its surface is heat-treated (hardness HRC28-32). The pitch of the lead screw 25 is 1mm. The lead screw 25 is coaxially arranged with the output shaft of the geared motor 24, and the other end of the lead screw 25 is rotatably connected to the other end of the support plate 21 via a bearing seat. A T-shaped mounting seat 26 is fixed between the four T-shaped guide blocks 23. The bottom of the T-shaped mounting seat 26 is fixedly connected to the top of the four T-shaped guide blocks 23 by bolts. The T-shaped mounting base 26 is provided with a threaded hole that is compatible with the lead screw 25. The T-shaped mounting base 26 is threadedly connected to the lead screw 25 through the threaded hole. The threaded connection between the lead screw 25 and the T-shaped mounting base 26 is a trapezoidal thread with a tooth angle of 30°. The T-shaped mounting base 26 is provided with an anti-loosening nut 5 on the side away from the geared motor 24. The anti-loosening nut 5 is made of 45 steel. The anti-loosening nut 5 is threadedly connected to the lead screw 25, and the end face of the anti-loosening nut 5 is in close contact with the side of the T-shaped mounting base 26. The specifications of the anti-loosening nut 5 are compatible with the lead screw 25.

[0035] The stamping mechanism 3 includes a cylinder 31 and a horizontal plate 32 fixed to the top of the T-shaped mounting base 26. The cylinder 31 is an SC63×100 (63mm diameter, 100mm stroke) and is vertically fixed to the center of the top of the T-shaped mounting base 26 by bolts. The horizontal plate 32 is a rectangular steel plate (Q235 material, 10mm thickness) and is fixed to the top of the T-shaped mounting base 26 by bolts, and the horizontal plate 32 surrounds the cylinder 31. The bottom end of the piston rod of the cylinder 31 is fixed with a punch mounting base 33 by threads. The punch mounting base 33 is a rectangular block (45# steel) and has threaded holes at the bottom for mounting stamping punches of different specifications (such as round punches, rectangular punches, drawing punches, etc.).

[0036] A pair of guide rods 34 are slidably connected to the horizontal plate 32. The guide rods 34 are made of 40Cr and have a chrome-plated surface (thickness 0.01mm). The pair of guide rods 34 are symmetrically distributed along the axis of the cylinder 31. The guide rods 34 are vertically set and have a diameter of 12mm. The horizontal plate 32 has guide holes that are adapted to the guide rods 34. A linear bearing is embedded in the inner wall of the guide hole. The linear bearing model is LM12UU. The inner ring of the linear bearing slides against the outer surface of the guide rod 34, and the two ends of the linear bearing are flush with the upper and lower surfaces of the horizontal plate 32, respectively. The bottom ends of the two guide rods 34 are fixedly connected to the two ends of the top of the punch mounting seat 33 by bolts. The guide rods 34 can slide along the inner ring of the linear bearing.

[0037] Specific work process

[0038] Height adjustment process: Based on the thickness of the automotive sheet metal to be processed (e.g., 1.5mm) and the stamping process (e.g., punching process, requiring a stamping height of 20mm), a control signal is sent to the geared motor 24 via an external controller (e.g., a PLC controller). The geared motor 24 starts, and the output shaft drives the lead screw 25 to rotate clockwise (assuming clockwise rotation corresponds to the T-shaped mounting base 26 moving towards the processing table 4). Since the T-shaped mounting base 26 cannot rotate due to the restriction of the T-shaped guide block 23 and the T-shaped guide groove 22, the rotational motion of the lead screw 25 is converted into the linear motion of the T-shaped mounting base 26 along the T-shaped guide groove 22. Based on the lead screw 25 pitch of 1mm and the required moving distance, when the T-shaped mounting base 26 drives the stamping mechanism 3 to move to the target height (20mm), the geared motor 24 stops running. The operator tightens the anti-loosening nut 5 on the side of the T-shaped mounting base 26, so that the anti-loosening nut 5 is tightly abutted against the T-shaped mounting base 26, completing the height adjustment.

[0039] Stamping process: The automotive sheet metal to be processed (1.5mm thick cold-rolled steel sheet) is placed between the positioning blocks on the processing table 4. After the sheet metal is positioned, the controller starts the cylinder 31. Compressed air (0.6MPa) is introduced into the air inlet of the cylinder 31, and the piston rod extends downward under the action of air pressure, driving the punch mounting seat 33 and the circular punch (10mm in diameter) mounted at the bottom to move downward synchronously. After the punch contacts the sheet metal, it continues to apply downward pressure, and the punch penetrates the sheet metal to complete the punching process. During this process, a pair of guide rods 34 on the top of the punch mounting seat 33 slide downward synchronously along the linear bearing on the horizontal plate 32 to prevent the punch mounting seat 33 from shifting. After the stamping is completed (the cylinder piston rod extends to its maximum stroke), the controller controls the exhaust port of the cylinder 31 to exhaust air, and the piston rod retracts upward under the action of the return spring, driving the punch mounting seat 33 and the punch to reset. The operator removes the processed sheet metal, completing one stamping cycle.

[0040] Adjustment process for different processes: When processing a chassis structural part with a thickness of 3mm (deep drawing process, stamping height required 35mm), first loosen the anti-loosening nut 5, control the geared motor 24 to reverse through the controller, drive the lead screw 25 to rotate counterclockwise, and the T-shaped mounting base 26 moves along the T-shaped guide groove 22 away from the processing table 4; according to the required height of 35mm (adjusting from the current 20mm to 35mm requires moving 15mm), control the geared motor 24 to rotate 15 times, adjust to the target height, and then tighten the anti-loosening nut 5; replace the drawing punch on the punch mounting base 33, and deep drawing stamping can be performed, realizing rapid adaptation to different processes.

[0041] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A stamping device for automotive sheet metal, comprising an L-shaped bracket (1), characterized in that: The L-shaped bracket (1) is equipped with a stamping mechanism (3) via a height adjustment mechanism (2). A processing table (4) is also provided on the L-shaped bracket (1). The height adjustment mechanism (2) includes a support plate (21) fixed to the L-shaped bracket (1). A pair of T-shaped guide grooves (22) are provided on the support plate (21). Each T-shaped guide groove (22) contains a pair of T-shaped guide blocks (23). The clearance between the T-shaped guide blocks (23) and the T-shaped guide grooves (22) is 0.02-0.05 mm. The outer surface of the T-shaped guide blocks (23) is coated with a wear-resistant coating with a thickness of 0.01-0.03 mm. The wear-resistant coating is polytetrafluoroethylene (PTFE). The support plate (21) is coated with fluoroethylene and is also equipped with a geared motor (24). The output shaft of the geared motor (24) is fixed with a lead screw (25). A T-shaped mounting seat (26) is fixed between the four T-shaped guide blocks (23). The T-shaped mounting seat (26) is threadedly connected to the lead screw (25). The threaded connection between the lead screw (25) and the T-shaped mounting seat (26) is a trapezoidal thread with a tooth angle of 30°. A lock nut is provided on the side of the T-shaped mounting seat (26) away from the geared motor (24). The lock nut is threadedly connected to the lead screw (25), and the end face of the lock nut is in close contact with the side of the T-shaped mounting seat (26).

2. The automotive sheet metal stamping device according to claim 1, characterized in that: The stamping mechanism (3) includes a cylinder (31) and a cross plate (32) fixed on a T-shaped mounting base (26), and a punch mounting base (33) is fixed to the bottom end of the piston rod of the cylinder (31).

3. The automotive sheet metal stamping device according to claim 2, characterized in that: A pair of guide rods (34) are slidably connected to the horizontal plate (32). The bottom ends of the two guide rods (34) are fixedly connected to the top two ends of the punch mounting base (33). The horizontal plate (32) is provided with guide holes that are adapted to the guide rods (34). A linear bearing is embedded in the inner wall of the guide hole. The inner ring of the linear bearing slides against the outer surface of the guide rod (34), and the two ends of the linear bearing are flush with the upper and lower surfaces of the horizontal plate (32).

4. The automotive sheet metal stamping device according to claim 1, characterized in that: The geared motor (24) is fixed to the support plate (21) by at least four countersunk bolts. The axis of the countersunk bolts is perpendicular to the upper surface of the support plate (21). A rubber shock-absorbing pad with a thickness of 2-5mm is provided between the outer shell of the geared motor (24) and the support plate (21). The rubber shock-absorbing pad is sleeved on the outside of the countersunk bolts.

5. The automotive sheet metal stamping device according to claim 1, characterized in that: The processing table (4) is fixed to the top of the horizontal end of the L-shaped bracket (1) by bolts, and the processing table (4) is located directly below the stamping mechanism (3). The top of the processing table (4) is provided with two symmetrical positioning blocks for positioning the automotive sheet metal to be processed.

6. The automotive sheet metal stamping device according to claim 1, characterized in that: The other end of the lead screw (25) is rotatably connected to the other end of the support plate (21) through a bearing seat, and the pitch of the lead screw (25) is 1mm.

7. The automotive sheet metal stamping device according to claim 2, characterized in that: The bottom of the punch mounting base (33) is provided with a threaded hole for installing punches of different specifications.

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