A stamping die device for automobile airbag housing

Abstract

The invention relates to the technical field of automobile parts manufacturing, and in particular to a stamping and forming die device for automobile airbag shells, comprising a base, a support column, a stamping tray, a stamping unit, a grinding unit and an automatic feeding unit; the invention can solve the following problems existing in the prior art in the stamping process of the airbag shell: after the stamping of the workpiece is completed, the burrs cannot be ground, resulting in injuries to workers when picking up the workpiece, posing a safety hazard; before stamping, the workpiece needs to be taken off the material belt and placed under the stamping device to achieve the stamping of the workpiece, and after the stamping is completed, the workpiece needs to be taken out and placed on the material belt, which has complicated steps, cannot achieve automatic feeding, and increases costs; the invention drives the upper die to move back and forth up and down by a hydraulic cylinder and cooperates with a rack and a linkage gear, so as to complete the automatic feeding, stamping and grinding of the workpiece in sequence, thereby improving work efficiency, and only requires a single drive of the hydraulic cylinder, with strong linkage and low cost.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts manufacturing, in particular to a stamping forming die device for an automobile safety airbag shell. Background Art

[0002] Automobile airbags are an important safety device that can be quickly inflated when a vehicle collides to protect the passengers in the car from collision injuries. The gas generator is one of the core components in the airbag system. It is directly related to the inflation effect and protective effect of the airbag. The function of the gas generator is to generate gas when the igniter detonates the ignition agent, quickly inflate the airbag, and make the airbag explode, thereby protecting the passengers in the car from collision injuries. Existing automobile airbags are usually produced by stamping.

[0003] In the prior art, a large number of devices for stamping and forming automobile airbag housings are disclosed. For example, a Chinese patent with publication number CN108714640A discloses a stamping device for producing airbag housings, including an upper die, a lower die, an external output shaft, a transmission system, a feeding mechanism, and an encoder for controlling the operation and stop of the stamping device. The stamping device also includes an opening mechanism that can make the feeding mechanism release the material belt. Sensors are distributed on the feeding mechanism. When the sensor senses that there is no material belt at the corresponding station, the information can be fed back to the encoder to control the mold to stop.

[0004] In the working process of the above-mentioned prior art, the upper die and the insert knife fixed to the upper die are both located above the material strip before stamping. At this time, the two open sliders are kept in close contact under the action of the reset pin, and the distance between the pair of main rods connected to the two open sliders is the shortest. The material strip can be clamped by the clamping claws to fix it at the designated station. When the upper die moves downward, the main rod clamping the material strip moves forward with the cam bearing driven by the fixed block connected to its end, and the material strip at the current station is sent to the next station, and the product is punched out on the material strip by the punch.

[0005] However, the above-mentioned stamping device for producing airbag housing has some shortcomings in actual use:

[0006] 1. After the workpiece is stamped, the above-mentioned prior art cannot grind the burrs generated during the stamping of the workpiece, which causes subsequent injuries to workers when picking up the workpiece, poses a safety hazard, and increases the number of work steps, thereby increasing costs.

[0007] 2. The above-mentioned prior art requires that the workpiece be removed from the material belt and placed under the stamping device before stamping the workpiece, so as to realize the stamping work of the workpiece. After the stamping is completed, the workpiece needs to be taken out from under the stamping device and placed on the material belt. The stamping steps of the device are too complicated, which increases the cost and reduces the production efficiency.

[0008] 3. The above-mentioned prior art cannot realize automatic loading of workpieces, so manual or semi-automatic loading is required, which is likely to reduce production speed and efficiency and increase costs.

[0009] Therefore, based on the above-stated viewpoints, there is still room for improvement in the existing stamping forming methods for automobile airbag housings. Summary of the invention

[0010] In order to solve the above problems, the present invention provides a stamping forming mold device for an automobile airbag shell, comprising a base, a support column is arranged at the upper end of the base, a disc-shaped stamping tray is installed at the upper end of the support column, a stamping unit and a polishing unit located outside the stamping tray are arranged at the upper end of the base, the stamping unit comprises a stamping bracket installed at the upper end of the base, a hydraulic cylinder is installed at the upper end of the stamping bracket, a mold mounting block is arranged at the lower end of the hydraulic cylinder, and an upper mold is threadedly connected to the lower part of the mold mounting block; the polishing unit comprises a polishing support wall installed at the upper end of the base, and an elastic polishing pad is arranged on the side of the polishing support wall close to the stamping tray.

[0011] Preferably, a plurality of die grooves distributed at 90 degrees are provided at the upper end of the stamping tray, a through hole is provided at the center of the die groove, and a lower die matching with the upper die is detachably installed in the die groove.

[0012] Preferably, the stamping unit also includes a connecting rod installed on the upper end of the mold mounting block, a rack is provided at the lower end of the connecting rod, a gear shaft is rotatably provided on the stamping bracket, and the outer wall of the gear shaft is sleeved with a linkage gear meshing with the rack; a bevel gear is sleeved at one end of the gear shaft close to the axis of the stamping tray, and the bevel gear is located below the stamping tray, and an annular gear ring meshing with the bevel gear is installed at the bottom of the stamping tray.

[0013] Preferably, the inner wall of the linkage gear is provided with a plurality of annularly distributed limit slots, and the outer wall of the gear shaft is provided with a plurality of connecting slots corresponding to the positions of the limit slots, and a limit stop block is slidably arranged in the connecting slot through a support spring, and the side of the limit stop block away from the support spring slides in contact with the limit slot.

[0014] Preferably, the depth of the limiting slot gradually increases along the clockwise direction of the linkage gear, and the side of the limiting slot pointing to the clockwise direction of the linkage gear is a plane.

[0015] Preferably, the grinding unit also includes a spring rod installed at the lower end of the lower mold, and the lower end of the spring rod is mounted with a gear plate after sliding through the through hole; a top block is installed at the upper end of the base, and the top block is located on the side of the grinding support wall close to the stamping tray, and the bottom of the spring rod is in sliding contact with the upper end of the top block, and an arc-shaped rack meshing with the gear plate is installed on the side of the grinding support wall close to the stamping tray.

[0016] Preferably, the top block is an arc-shaped structure, and the height of the top block gradually decreases from the middle to the two ends; a fixed plate is installed on the side of the upper end of the grinding support wall close to the stamping tray, and a plurality of ball bearings are rotatably arranged at the lower end of the fixed plate, and the distance between the fixed plate and the upper mold is equal to the distance between the two ends of the top block and the middle thereof.

[0017] Preferably, it also includes an automatic loading unit, which includes a loading bracket installed on the upper end of the base, and a material holding bucket is provided on one side of the loading bracket close to the stamping tray through a plurality of support rods.

[0018] Preferably, an arc-shaped material-discharging groove is provided through the bottom of the material holding barrel, and a discharge port is provided on the side of the material holding barrel pointing to the rotation direction of the stamping tray. The discharge port is close to the lower end of the material holding barrel and is connected to the material-discharging groove, and the discharge port is flush with the inner bottom wall of the material-discharging groove. A plurality of material-discharging rods arranged alternately with the mold grooves are installed on the upper end of the stamping tray, and the material-discharging rods slide through the material-discharging groove.

[0019] In summary, the present application includes at least one of the following beneficial technical effects:

[0020] 1. The present invention drives the upper mold to move up and down reciprocatingly through the hydraulic cylinder, and cooperates with the rack and the linkage gear to control the intermittent rotation of the stamping tray. During this period, the automatic loading, stamping and grinding of the workpiece can be completed in sequence, which can improve work efficiency and only requires a single hydraulic cylinder drive, with strong linkage and low cost.

[0021] 2. The present invention uses a push block to push the spring rod upward to make the gear plate contact with the arc-shaped rack, so that the gear plate rotates along the arc-shaped rack, thereby driving the lower mold to rotate. During the rotation, the edge of the workpiece contacts the elastic grinding pad, and the grinding pad grinds the burrs on the edge of the workpiece at this time, avoiding injuries to subsequent workers when taking out the workpiece, thereby reducing safety hazards to workers.

[0022] 3. The present invention drives the material-push rod to pass through the material-push groove when the punching tray rotates, and pushes the workpiece out of the discharge port and falls into the mold groove. Because the height of the discharge port is consistent with the thickness of the workpiece, and the material-push groove is flush with it, the material-push rod only pushes one workpiece each time, thereby realizing automatic loading of the workpiece and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 It is a structural schematic diagram of the present invention.

[0025] Figure 2 It is a structural schematic diagram of the punching tray of the present invention.

[0026] Figure 3 It is a structural schematic diagram of the grinding unit of the present invention.

[0027] Figure 4 It is a schematic diagram of the structure between the punching unit and the punching tray of the present invention.

[0028] Figure 5 It is a schematic diagram of the structure between the linkage gear and the gear shaft of the present invention.

[0029] Figure 6 The present invention Figure 5 A partial enlarged view of point A.

[0030] Figure 7 It is a structural schematic diagram of the automatic feeding unit of the present invention.

[0031] Figure 8 The present invention Figure 7 A partial enlarged view of point B.

[0032] In the figure, 1, base; 2, support column; 3, stamping tray; 31, mold groove; 32, lower mold; 33, annular gear ring; 34, material pusher rod; 35, gear plate; 36, spring rod; 4, stamping unit; 41, hydraulic cylinder; 42, mold mounting block; 43, upper mold; 44, stamping bracket; 45, rack connecting rod; 46, rack; 47, linkage gear; 471, limit slot; 472, limit block; 473, support spring; 474, connecting slot; 48, gear shaft; 49, quasi-gear; 5, grinding unit; 51, top block; 52, annular rack; 53, grinding support wall; 54, fixed plate; 55, ball; 56, elastic grinding pad; 6, automatic feeding unit; 61, feeding support frame; 62, material holding barrel; 63, support rod; 64, discharge port; 65, material pusher groove. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-8 Embodiments of the present invention are described in detail.

[0034] The embodiment of the present application discloses a stamping and forming die device for an automobile airbag shell, which explains that the stamping and forming die device for an automobile airbag shell is mainly used in the process of stamping an automobile airbag shell. In terms of technical effect, the stamping tray can be controlled to rotate intermittently through the stamping unit, during which the workpiece can be automatically loaded, stamped and polished, thereby improving work efficiency. The burrs formed after the workpiece is stamped can be polished to avoid the influence of the burrs on the processing, thereby improving production efficiency and reducing costs.

[0035] Embodiment 1:

[0036] Reference Figure 1 , Figure 2 and Figure 3 As shown, in order to be able to automatically stamp and form the workpiece and grind the burrs on the edge of the workpiece after forming, an automobile airbag shell stamping mold device is provided in this embodiment, specifically, it includes a base 1, a support column 2 is arranged on the upper end of the base 1, a disc-shaped stamping tray 3 is installed on the upper end of the support column 2, a stamping unit 4 and a grinding unit 5 located outside the stamping tray 3 are arranged on the upper end of the base 1, the stamping unit 4 includes a stamping bracket 44 installed on the upper end of the base 1, a hydraulic cylinder 41 is installed on the upper end of the stamping bracket 44, a mold mounting block 42 is arranged on the lower end of the hydraulic cylinder 41, an upper mold 43 is threadedly connected to the lower part of the mold mounting block 42, and a plurality of mold grooves 31 distributed at 90 degrees are opened on the upper end of the stamping tray 3, a through hole is opened at the center position of the mold groove 31, and a lower mold 32 matching the upper mold 43 is detachably installed in the mold groove 31.

[0037] Furthermore, in this embodiment, the grinding unit 5 includes a grinding support wall 53 installed on the upper end of the base 1 , and an elastic grinding pad 56 is provided on one side of the grinding support wall 53 close to the stamping tray 3 .

[0038] It should be noted that the side of the stamping tray 3 close to the stamping bracket 44 is a stamping station for stamping the workpiece, and the side of the stamping tray 3 close to the grinding support wall 53 is a finishing station for grinding the stamped workpiece.

[0039] In actual application, the hydraulic cylinder 41 is first started to extend its telescopic end downward, driving the upper mold 43 to stamp the workpiece placed in the mold groove 31 to make it have the same shape as the mold. After the stamping is completed, the telescopic end of the hydraulic cylinder 41 drives the upper mold 43 to move upward and reset, and the stamping tray 3 rotates 90 degrees along the direction from the stamping bracket 44 to the polishing support wall 53 and drives the stamped workpiece to be transferred from the stamping station to the trimming station. During this period, the workpiece gradually contacts the elastic polishing pad 56 while the stamping tray 3 rotates, and the burrs on the workpiece caused by stamping are polished, thereby avoiding injuries to subsequent workers when picking up the workpiece.

[0040] Reference Figure 4 As shown, in order to improve work efficiency, in this embodiment, the hydraulic cylinder 41 can drive the upper mold 43 to reset upward while driving the stamping tray 3 to transfer from the stamping station to the trimming station without adding an additional driving force device. Based on this, in this embodiment, the stamping unit 4 also includes a connecting rod installed at the upper end of the mold mounting block 42, and a rack 46 is provided at the lower end of the connecting rod. A gear shaft 48 is rotatably provided on the stamping bracket 44, and a linkage gear 47 meshing with the rack 46 is sleeved on the outer wall of the gear shaft 48.

[0041] Furthermore, in this embodiment, a bevel gear is sleeved on one end of the gear shaft 48 close to the axis of the stamping tray 3, and the bevel gear is located below the stamping tray 3. An annular gear ring 33 meshing with the bevel gear is installed at the bottom of the stamping tray 3.

[0042] In actual application, after the stamping of the workpiece is completed, the telescopic end of the hydraulic cylinder 41 resets upward while driving the mold mounting block 42, the rack connecting rod 45 and the rack 46 to move upward as a whole. When the rack 46 moves upward, it drives the interlocking gear 47 meshing with it to rotate, and the interlocking gear 47 drives the gear shaft 48 and the bevel gear to rotate, and the bevel gear drives the stamping tray 3 to rotate through the annular gear ring 33 meshing with it; in addition, each time the rack 46 moves upward, it drives the stamping tray 3 to rotate 90 degrees through the interlocking gear 47, the gear shaft 48, the bevel gear and the annular gear ring 33, so as to increase the linkage of the present invention, reduce redundant driving devices, and thus reduce costs.

[0043] Reference Figure 4 , Figure 5 and Figure 6 As shown, in order to make the linkage gear 47 drive the gear shaft 48 and the bevel gear to rotate only when the rack 46 moves upward, when the rack 46 moves downward, only the linkage gear 47 rotates without driving the gear shaft 48 and the bevel gear to rotate, based on this, in this embodiment, the inner wall of the linkage gear 47 is provided with a plurality of annularly distributed limiting grooves 471, and the outer wall of the gear shaft 48 is provided with a plurality of connecting grooves 474 corresponding to the positions of the limiting grooves 471, and a limiting stop block 472 is slidably arranged in the connecting groove 474 by a supporting spring 473, so as to limit The side of the positioning block 472 away from the supporting spring 473 slides in contact with the limiting slot 471, and the supporting spring 473 always applies a top contact force to the limiting block 472 pointing to the side away from the gear shaft 48, so that the limiting block 472 slides in contact with the limiting slot 471, and the depth of the limiting slot 471 gradually increases in the clockwise direction of the linkage gear 47, and the side of the limiting slot 471 pointing to the clockwise direction of the linkage gear 47 is a plane, and the side of the limiting slot 471 away from the plane gradually approaches the side of the gear shaft 48 and forms an arc-shaped extrusion area.

[0044] In actual application, when the rack 46 moves downward and drives the interlocking gear 47 to rotate clockwise, the limit stop block 472 slides into the arc-shaped extrusion area of ​​the limit slot 471 and cannot be fixed with the limit slot 471, so the interlocking gear 47 will not drive the gear shaft 48 and the bevel gear to rotate, and then the stamping tray 3 cannot rotate; when the rack 46 moves upward, it drives the interlocking gear 47 to rotate counterclockwise. At this time, the limit stop block 472 conflicts with the plane of the limit slot 471, so that the interlocking gear 47 and the gear shaft 48 are in a locked state, thereby ensuring that only when the hydraulic cylinder 41 moves upward and drives the interlocking gear 47 to rotate, the stamping tray 3 can be driven to rotate, and when the hydraulic cylinder 41 moves downward and drives the interlocking gear 47 to rotate, the stamping tray 3 will not rotate.

[0045] It should be noted that a damping ring (not shown in the figure) is arranged between the gear shaft 48 and the stamping bracket 44. The damping ring limits the gear shaft 48 to prevent the friction between the limit slot 471 and the limit block 472 from driving the gear shaft 48 and the bevel gear to rotate when the linkage gear 47 rotates clockwise, thereby ensuring that when the rack 46 moves downward to drive the linkage gear 47 to rotate, the stamping tray 3 remains stationary and does not rotate at will, so that the upper mold 43 and the lower mold 32 can be accurately docked and the workpiece can be stamped.

[0046] Reference Figure 2 and Figure 3 As shown, in order to ensure that the burrs formed on the edge of the workpiece can be polished after the stamping is completed, based on this, in the present embodiment, the polishing unit 5 also includes a spring rod 36 installed at the lower end of the lower mold 32, and the lower end of the spring rod 36 slides through the through hole and is sleeved with a gear plate 35; a top block 51 is installed at the upper end of the base 1, and the top block 51 is located on the side of the polishing support wall 53 close to the stamping tray 3, and the bottom of the spring rod 36 slides against the upper end of the top block 51, and an arc-shaped rack 46 meshing with the gear plate 35 is installed on the side of the polishing support wall 53 close to the stamping tray 3.

[0047] Furthermore, in this embodiment, the top block 51 is an arc-shaped structure, and the height of the top block 51 gradually decreases from the middle to the two ends; a fixed plate 54 is installed on the side of the upper end of the grinding support wall 53 close to the stamping tray 3, and a plurality of balls 55 are rotatably arranged on the lower end of the fixed plate 54, and the distance between the fixed plate 54 and the upper mold 43 is equal to the distance between the two ends of the top block 51 and the middle thereof.

[0048] The lower die 32 connected to the spring rod 36 is also lifted up. When the spring rod 36 moves to the highest position in the middle of the top block 51, the gear plate 35 engages with the arc-shaped rack 46, so that the gear plate 35 drives the lower die 32 and the workpiece to rotate as a whole through the spring rod 36. At the same time, the workpiece on the top of the lower die 32 rolls against the ball 55, so that the workpiece can be fixed by the lifting of the lower die 32 and the interference limit of the ball 55, so that it can only rotate and cannot move in other directions. The edge of the workpiece contacts the elastic grinding pad 56 and rotates under the drive of the stamping tray 3, so that the workpiece is rotationally polished, the polishing area is increased, the burrs on its edge are completely removed, and the safety hazards are reduced.

[0049] After grinding is completed, the stamping tray 3 drives the spring rod 36, the lower mold 32 and the polished workpiece to be moved out of the finishing station as a whole. At this time, the spring rod 36 drives the lower mold 32 and the workpiece to move down and reset under its own elastic action, and then the processed workpiece can be taken out.

[0050] In addition, a material shifting rack (not shown in the figure) is installed at the bottom of the lower mold 32. The scraps generated during the stamping process of the workpiece are piled on the top of the material shifting rack in the mold groove 31. Then, during the upward movement of the lower mold 32, the scraps can be shifted upward and discharged from the mold groove 31 by the material shifting rack, so as to avoid scraps remaining in the mold groove 31 and affecting the subsequent stamping effect.

[0051] Embodiment 2:

[0052] Reference Figure 7 and Figure 8 As shown, on the basis of Example 1, in order to reduce labor costs and realize automatic supply of workpieces, in this embodiment, it also includes an automatic loading unit 6, which includes a loading bracket installed on the upper end of the base 1, and a material holding barrel 62 is provided on the side of the loading bracket close to the stamping tray 3 through a plurality of support rods 63, and an arc-shaped material discharging groove 65 is provided through the bottom of the material holding barrel 62, and a discharge port 64 is provided on the side of the material holding barrel 62 pointing to the rotation direction of the stamping tray 3, and the discharge port 64 is close to the lower end of the material holding barrel 62 and is connected to the material discharging groove 65, and the discharge port 64 is flush with the inner bottom wall of the material discharging groove 65, and a plurality of material discharging rods 34 arranged in an alternating manner with the mold grooves 31 are installed on the upper end of the stamping tray 3, and the material discharging rods 34 slide through the material discharging groove 65.

[0053] In actual application, workers first put multiple workpieces horizontally into the material holding barrel 62. When the stamping tray 3 rotates, it drives the material pusher rod 34 to pass through the material pusher groove 65, and pushes the workpiece out of the discharge port 64 and falls into the mold groove 31. Because the height of the discharge port 64 is consistent with the thickness of the workpiece, and the top wall of the material pusher groove 65 is flush with the top wall of the discharge port 64, the material pusher rod 34 only pushes one workpiece each time, thereby realizing automatic loading of the workpiece. The worker only needs to put the workpiece into the material holding barrel 62 at regular intervals. In addition, the present invention is realized only by the stamping tray 3 driving the material pusher rod 34 to rotate and cooperate with the material holding barrel 62, which increases the linkage of the device.

[0054] During work: Step 1: The worker first puts multiple workpieces horizontally into the material holding barrel 62. When the stamping tray 3 rotates, it drives the material pushing rod 34 to pass through the material pushing groove 65, and pushes the workpiece out of the discharge port 64 and falls into the mold groove 31, thereby realizing automatic loading of the workpiece. The worker only needs to put the workpiece into the material holding barrel 62 at a regular interval.

[0055] Step 2: Start the hydraulic cylinder 41 to extend its telescopic end downward, driving the upper die 43 to punch the workpiece placed in the die slot 31 to make it have the same shape as the die.

[0056] Step 3: After the stamping is completed, the telescopic end of the hydraulic cylinder 41 drives the upper mold 43 to move upward and reset, and the stamping tray 3 rotates 90 degrees along the direction from the stamping bracket 44 to the grinding support wall 53 and drives the stamped workpiece to be transferred from the stamping station to the finishing station. During this period, the workpiece gradually contacts the elastic grinding pad 56 while the stamping tray 3 rotates, and the burrs on the workpiece caused by stamping are polished, avoiding injuries to subsequent workers when picking up the workpiece.

[0057] Step 4: After grinding is completed, the stamping tray 3 drives the spring rod 36, the lower mold 32 and the polished workpiece to be moved out of the finishing station as a whole. At this time, the spring rod 36 drives the lower mold 32 and the workpiece to move down and reset under its own elastic action, and then the processed workpiece can be taken out.

[0058] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0059] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A stamping die device for a vehicle airbag housing, comprising a base (1), a support column (2) being arranged at the upper end of the base (1), a disc-shaped stamping tray (3) being mounted at the upper end of the support column (2), a stamping unit (4) and a grinding unit (5) being arranged at the upper end of the base (1) and located outside the stamping tray (3), characterized in that: The punching unit (4) comprises a punching support (44) mounted on the upper end of the base (1); a hydraulic cylinder (41) is mounted on the upper end of the punching support (44); a mold mounting block (42) is disposed on the lower end of the hydraulic cylinder (41); and an upper mold (43) is threadedly connected to the lower portion of the mold mounting block (42); The grinding unit (5) comprises a grinding support wall (53) mounted on the upper end of the base (1), and a resilient grinding pad (56) is provided on a side of the grinding support wall (53) close to the stamping tray (3); The upper end of the punching tray (3) is provided with a plurality of die grooves (31) distributed at 90 degrees, a through hole is provided at the center of the die groove (31), and a lower die (32) matching with the upper die (43) is detachably installed in the die groove (31); The punching unit (4) further comprises a connecting rod mounted on the upper end of the die mounting block (42), a rack (46) being arranged at the lower end of the connecting rod, a gear shaft (48) being rotatably arranged on the punching bracket (44), and a linkage gear (47) meshing with the rack (46) being sleeved on the outer wall of the gear shaft (48); A bevel gear is sleeved on one end of the gear shaft (48) close to the axis of the punching tray (3), and the bevel gear is located below the punching tray (3). An annular gear ring (33) meshing with the bevel gear is installed at the bottom of the punching tray (3); The grinding unit (5) further comprises a spring rod (36) mounted on the lower end of the lower mold (32); the lower end of the spring rod (36) slides through the through hole and is sleeved with a gear plate (35); A top block (51) is installed at the upper end of the base (1), and the top block (51) is located on a side of the grinding support wall (53) close to the punching tray (3), and the bottom of the spring rod (36) is in sliding contact with the upper end of the top block (51), and an annular rack (52) meshing with the gear plate (35) is installed on the side of the grinding support wall (53) close to the punching tray (3); The top block (51) is an arc-shaped structure, and the height of the top block (51) gradually decreases from the middle to both ends; A fixed plate (54) is installed on one side of the upper end of the grinding support wall (53) close to the punching tray (3), and a plurality of balls (55) are rotatably arranged on the lower end of the fixed plate (54). The distance between the fixed plate (54) and the upper mold (43) is equal to the distance between the two ends of the top block (51) and the middle thereof.

2. The stamping die device for automobile airbag housing according to claim 1, characterized in that: The inner wall of the linkage gear (47) is provided with a plurality of annularly distributed limiting grooves (471), the outer wall of the gear shaft (48) is provided with a plurality of connecting grooves (474) corresponding to the positions of the limiting grooves (471), a limiting stop block (472) is slidably arranged in the connecting groove (474) via a supporting spring (473), and a side of the limiting stop block (472) away from the supporting spring (473) is in sliding contact with the limiting groove (471).

3. The stamping die device for automobile airbag housing according to claim 2, characterized in that: The depth of the limiting slot (471) gradually increases in the clockwise direction of the linkage gear (47), and the side of the limiting slot (471) pointing in the clockwise direction of the linkage gear (47) is a plane.

4. The stamping die device for automobile airbag housing according to claim 1, characterized in that: It also includes an automatic loading unit (6), which includes a loading bracket mounted on the upper end of the base (1), and a material receiving bucket (62) is provided on a side of the loading bracket close to the stamping tray (3) via a plurality of support rods (63).

5. The stamping die device for automobile airbag housing according to claim 4, characterized in that: The bottom of the material holding barrel (62) is provided with an arc-shaped material shifting groove (65), and a discharge port (64) is provided on the side of the material holding barrel (62) pointing to the rotation direction of the punching tray (3). The discharge port (64) is close to the lower end of the material holding barrel (62) and is connected to the material shifting groove (65), and the discharge port (64) is flush with the inner bottom wall of the material shifting groove (65). A plurality of material shifting rods (34) arranged in an alternating manner with the mold grooves (31) are installed on the upper end of the punching tray (3), and the material shifting rods (34) slide through the material shifting groove (65).

Images