Split die structure and side piercing die for automobile airbag housing

Abstract

This utility model discloses a split punch structure for automotive airbag housings, comprising: a pull rod, a side-hole punch pushed by the pull rod and translating horizontally, and a guide block. One end of the pull rod is an inclined push surface, and the other end of the pull rod has a connecting groove. One end of the side-hole punch has a connecting portion, which is disposed in the connecting groove, and there is a movable gap between the connecting portion and the connecting groove. The other end of the side-hole punch is movably connected to the guide block. The guide block is spaced apart from the pull rod. A side-punching mold for automotive airbag housings includes an upper mold mechanism and a lower mold mechanism. The lower mold mechanism includes a punch guide seat and a punch cover plate, and a split punch structure is provided between the punch guide seat and the punch cover plate. This utility model's split punch structure and side-punching mold for automotive airbag housings ensure that the side-hole punch always moves horizontally during the punching process, improving punching quality and preventing mold damage.

Description

Technical Field

[0001] This utility model relates to the field of mold stamping technology, specifically to stamping dies for automotive airbag housings, and more particularly to a split punch structure and a side punching die for automotive airbag housings. Background Technology

[0002] The processing of automotive airbag housings requires high precision in the inner wall machining. Typically, the inner wall of an airbag housing has multiple small holes distributed around its perimeter. When punching these holes, the inner wall must be free of burrs. This necessitates a different punching method: instead of the conventional outward-to-inward approach, the punching must proceed from the inner to the outer side. This method ensures that any burrs are on the outer wall, resulting in a smooth and clean inner wall that does not affect the housing's performance.

[0003] Patent CN211101079U discloses a device for punching sidewalls of automotive airbag housings. During the downward movement, the side punching punch contacts a support column, thereby pushing the side punching punch to the right. However, during the mold closing process, the punch cover plate and punch guide seat cannot clamp the entire punching punch. As the support column drives the side punch to move laterally to the right, the upward reaction force of the friction between the wedge groove of the support column and the rear half of the side punch causes a slight upward slippage of the rear half of the side punch. This results in a "head-down" phenomenon at the front end of the side punch, leading to unstable cutting edge clearance during punching, excessive burrs on the side hole opening of the product, poor quality, unstable production process, low efficiency, and damage to the cutting edges of the side punching punch and die, resulting in high mold costs. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to solve the technical problem of side hole punch skew in the prior art, this utility model provides a split punch structure and side punching mold for automotive airbag housing, which can ensure that the side hole punch always moves in the horizontal direction during the punching process, improve the punching quality, and avoid mold damage.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a split punch structure for automotive airbag housing, comprising: a pull rod, one end of which is an inclined push surface, and the other end of which has a connecting groove; a side hole punch that is pushed by the pull rod and moves horizontally, one end of which has a connecting part, which is disposed in the connecting groove, and there is a movable gap between the connecting part and the connecting groove; the other end of which is movably connected to a guide block; and a guide block, wherein the guide block is spaced apart from the pull rod.

[0006] This utility model relates to a split punch structure for automotive airbag housings. The split structure features a movable clearance fit between the tie rod and the side hole punch, preventing the tie rod from causing the side hole punch to shift during movement. The guide block, in conjunction with the guide block, enables the side hole punch to move precisely along the horizontal direction, thus preventing unstable cutting edge clearance during punching.

[0007] Furthermore, in order to allow the tie rod to offset relative to the side hole punch, the connecting groove has a receiving cavity and a limiting opening, with a portion of the connecting part movably disposed in the receiving cavity and another portion movably engaged with the limiting opening.

[0008] Furthermore, in order to connect the side hole punch and the tie rod, the connecting part includes a reduced diameter section and an expanded diameter section, the expanded diameter section being located within the receiving cavity, and the reduced diameter section being located within the limiting constriction opening.

[0009] Furthermore, in order for the side hole punch to be pushed and translated by the pull rod, a portion of the end face of the receiving cavity contacts the end face of the enlarged section to push the side hole punch to translate.

[0010] Furthermore, in order to further guide the side hole punch, the guide block has a through guide hole, and the right end of the side hole punch translates along the guide hole.

[0011] The technical solution adopted by this utility model to solve its technical problem is: a side punching mold for automotive airbag housing, comprising: an upper mold mechanism and a lower mold mechanism, wherein the housing is disposed on the lower mold mechanism, and the upper mold mechanism moves downward to push the housing and the lower mold mechanism; the lower mold mechanism comprises: a lower mold post; a punch guide seat, wherein the punch guide seat is disposed on the outer periphery of the lower mold post and is pushed towards the lower mold post by the upper mold mechanism; a punch cover plate, wherein the punch cover plate is connected above the punch guide seat; a split punch structure as described above is provided between the punch guide seat and the punch cover plate; the split punch structure moves downward relative to the lower mold post, and the inclined wedge of the lower mold post pushes the pull rod to move horizontally, thereby causing the side hole punch to extend in the horizontal direction.

[0012] This utility model is used for a side punching die for automotive airbag housings. When the die is closed, the side punch can punch in the horizontal direction, avoiding the phenomenon of the side punch tilting down when punching the side hole. This also avoids burrs caused by unstable clearance between the side punch and die, thus improving product quality and production efficiency.

[0013] Furthermore, in order to position the guide block, the punch guide seat and the punch cover plate close together to press the guide block.

[0014] Furthermore, in order to cooperate with the side hole punch to punch the housing, the lower die mechanism also includes a die slider that can be translated in the horizontal direction. The die slider is located outside the side hole punch, and the die slider has a side hole die facing the side hole punch.

[0015] Furthermore, in order to achieve the translation of the die slider, the upper mold mechanism is equipped with an upper mold column, the bottom of which has a wedge. The upper mold mechanism drives the wedge downward and pushes the die slider to translate towards the side hole punch and press against the outer wall of the housing.

[0016] Furthermore, in order to push the die slider to translate, the wedge portion includes a wedge surface, and the die slider has an inclined surface that mates with the wedge surface at one end away from the side hole die, and the wedge surface abuts against the inclined surface to push the die slider to translate.

[0017] Furthermore, in order to reserve space for the upper mold column, the die slider has a receiving groove corresponding to the wedge portion, and the wedge portion enters the receiving groove after the wedge surface separates from the die slider.

[0018] Furthermore, in order to ensure that the die slider does not shift during punching, the wedge portion also includes a limiting surface located above the wedge surface, the limiting surface abutting against the receiving groove to limit the die slider.

[0019] Furthermore, in order to enable the die slider to quickly reset, the lower end of the die slider is connected to the punch guide seat by a spring.

[0020] Furthermore, in order to position the installation target, the lower mold mechanism also includes an unloading plate, on which a housing is provided. The unloading plate moves downward relative to the punch guide seat and contacts the punch guide seat, thereby placing the housing on the punch cover plate.

[0021] Furthermore, in order to fix the shell, the surface of the unloading plate is provided with multiple cones spaced circumferentially.

[0022] Furthermore, to prevent the unloading plate from rotating or shifting during movement, the unloading plate has guide protrusions in its circumferential direction.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] 1. This utility model is used for a split punch structure and a side punching die for automotive airbag housings. It adopts a split structure, and there is sufficient clearance between the connection parts of the tie rod and the side punch. The slight deviation of the tie rod during the movement will not be transmitted to the side punch. At the same time, with the help of the guide block, it can ensure that the side punch moves horizontally and linearly for punching, avoid the side punch from tilting down, and ensure that the side holes of the housing are burr-free. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Figure 1This is a schematic diagram of the side punching mold for automotive airbag housing according to the present invention;

[0027] Figure 2 A three-dimensional structural diagram of a split punch structure;

[0028] Figure 3 This is a schematic diagram of the three-dimensional structure of the tie rod;

[0029] Figure 4 This is a three-dimensional structural diagram of the side hole punch;

[0030] Figure 5 This is a schematic diagram showing the closed state of a side punching mold used for automotive airbag housings.

[0031] Figure 6 This is a three-dimensional structural diagram of the punch guide seat;

[0032] Figure 7 This is a schematic diagram of the three-dimensional structure of the punch cover plate;

[0033] Figure 8 This is a schematic diagram of the three-dimensional structure of the lower mold column;

[0034] Figure 9 This is a schematic diagram of the three-dimensional structure of the upper mold column;

[0035] Figure 10 This is a three-dimensional structural diagram of the die slider;

[0036] Figure 11 This is a three-dimensional structural diagram of the unloading plate;

[0037] Figure 12 This is a top view of the lower mold mechanism.

[0038] In the picture:

[0039] 1. Upper mold mechanism; 11. Upper mold pillar; 111. Inclined wedge surface; 112. Limiting surface; 12. Upper pressure block; 13. Upper limit block.

[0040] 2. Lower mold mechanism, 21. Lower mold pillar, 22. Punch guide seat, 23. Punch cover plate, 24. Stripper plate, 241. Guide punch, 242. Conical body, 25. Die slide block, 26. Side hole die;

[0041] 3. Shell;

[0042] 4. Split punch structure, 41. Tie rod, 411. Inclined push surface, 412. Connecting groove, 42. Side hole punch, 421. Connecting part, 4211. Reduction section, 4212. Expansion section, 43. Guide block. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0044] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] like Figure 1 As shown, a side punching mold for automotive airbag housings includes: an upper mold mechanism 1 and a lower mold mechanism 2.

[0047] Specifically, the upper mold mechanism 1 moves downward to push the housing 3 and the lower mold mechanism 2. The upper mold mechanism 1 includes an upper mold pillar 11, an upper pressure block 12, and an upper limit block 13 (other structures of the upper mold mechanism are not directly related to the concept of this invention and will not be listed here). The specific functions of the upper pressure block 12, the upper limit block 13, and the upper mold pillar 11 will be explained in the following text in conjunction with the specific working process.

[0048] Specifically, a housing 3 is mounted on the lower die mechanism 2. The lower die mechanism 2 includes a lower die post 21, a punch guide seat 22, and a punch cover plate 23. The punch guide seat 22 is located on the outer periphery of the lower die post 21 and is pushed towards the lower die post 21 by the upper die mechanism 1. The punch cover plate 23 is connected above the punch guide seat 22. A split punch structure 4 is provided between the punch guide seat 22 and the punch cover plate 23. The punch guide seat 22 and the punch cover plate 23 are pushed by the upper die mechanism 1, causing the split punch structure 4 to move downwards synchronously. Since the lower die post 21 is fixed, the split punch structure 4 will contact the lower die post 21 after moving downwards, and the lower die post 21 will push it to punch the housing 3.

[0049] like Figures 2 to 4 As shown, specifically, the split punch structure 4 includes a pull rod 41, a side-hole punch 42, and a guide block 43. One end of the pull rod 41 is an inclined push surface 411, and the other end of the pull rod 41 has a connecting groove 412. One end of the side-hole punch 42 has a connecting part 421, which is disposed within the connecting groove 412, and there is a movable gap between the connecting part 421 and the connecting groove 412. The other end of the side-hole punch 42 is movably connected to the guide block 43. The guide block 43 is spaced apart from the pull rod 41.

[0050] Preferably, the connecting groove 412 has a receiving cavity and a limiting constriction opening. A portion of the connecting part 421 is movably disposed within the receiving cavity, and another portion is movably engaged with the limiting constriction opening. The connecting part 421 includes a reduced diameter section 4211 and an expanded diameter section 4212. The expanded diameter section 4212 is located within the receiving cavity, and the reduced diameter section 4211 is located within the limiting constriction opening. The connecting groove 412 and the connecting part 421 can form a hook-like structure, allowing the pull rod 41 a certain amount of movement relative to the side hole punch 42. Simultaneously, under the action of the connecting groove 412 and the connecting part 421, due to the movement gap between the pull rod 41 and the side hole punch 42, slight offsets of the pull rod 41 in various directions will not be transmitted to the side hole punch 42.

[0051] Preferably, a portion of the end face of the receiving cavity contacts the end face of the expanding section 4212 to push the side hole punch 42 to translate. During the translation of the pull rod 41, the end face of the receiving cavity pushes the end face of the expanding section 4212, thereby realizing the translation of the side hole punch 42.

[0052] Preferably, the guide block 43 has a through guide hole, and the end of the side hole punch 42 away from the tie rod moves along the guide hole. Since the punch guide seat 22 and the punch cover plate 23 will press the guide block 43 together when the mold is closed, thereby fixing the guide block 43, the side hole punch 42 can be guaranteed to move in a horizontal straight line under the guiding action of the guide block 43.

[0053] like Figures 5 to 8As shown, when the side punching die is working, the housing 3 is first placed on the stripper plate 24. The upper push rod presses down on the stripper plate 24. The spring force behind the upper push rod is greater than the spring force of the lower stripper rod. The upper die mechanism 1 moves downward, and the upper pressure block 12 pushes the housing 3 downward until the housing 3 is in contact with the lower punch cover plate 23. At this time, the upper limit block 13 contacts the lower cover plate, and the lower cover plate drives the entire lower die mechanism 2 downward. At this time, the punch guide seat 22, the punch cover plate 23 and the split punch structure 4 move downward synchronously. When the inclined push surface 411 of the pull rod 41 contacts the inclined surface of the upper part of the lower die column 21, the pull rod 41 moves horizontally away from the center of the lower die column 21 while moving downward, and pushes the side hole punch 42 to move synchronously. The side hole punch 42 moves horizontally under the action of the guide block 43 and punches the housing 3 (the relationship between the action of the upper die column and the die slider will be described in detail below).

[0054] Because the tie rod 41 needs to translate, the punch guide seat 22 and the punch cover plate 23 cannot completely press the tie rod 41 together. Therefore, during the movement of the tie rod 41 relative to the lower die post 21, the friction between the two causes a slight movement offset of the tie rod 41. Through the cooperation of the connecting part 421 and the connecting groove 412, it can be prevented that the tie rod 41 will cause the side hole punch 42 to shift in the vertical direction when sliding. At the same time, the guide block 43 guides the horizontal linear movement of the side hole punch 42, ensuring that the side hole punch 42 will only move in the horizontal linear direction and preventing the side hole punch 42 from tilting down.

[0055] Since punching the housing 3 also requires the cooperation of the side hole die 26, specifically, the lower die mechanism 2 also includes a die slider 25 that can be translated in the horizontal direction. The die slider 25 is located outside the side hole punch 42, and the die slider 25 has a side hole die 26 facing the side hole punch 42.

[0056] This embodiment only describes one set of split punch structures 4. The actual number of split punch structures in a side punching die can be seen in [the following text is incomplete and requires further context]. Figure 12 .

[0057] like Figures 9 to 11 As shown, specifically, the upper die mechanism 1 is equipped with an upper die pillar 11, the bottom of which has a wedge portion 11. The upper die mechanism 1 drives the wedge portion downwards, pushing the die slider 25 towards the side hole punch 42 and pressing it against the outer wall of the housing 3. During the downward movement of the upper die mechanism 1, the upper die pillar 11 also moves downwards synchronously, and the wedge portion comes into contact with the die slider 25. As the lower die mechanism 2 moves downwards, the wedge portion pushes the die slider 25 towards the housing 3 until the side hole die 26 fits against the housing 3, and cooperates with the side hole punch 42 to complete the punching of the housing 3.

[0058] Preferably, the wedge portion includes a wedge surface 111, and the die slider 25 has an inclined surface at one end away from the side hole die 26 that engages with the wedge surface 111. The wedge surface 111 abuts against the inclined surface to push the die slider 25 to translate.

[0059] Preferably, the die slider 25 has a receiving groove corresponding to the wedge portion. After the wedge surface 111 separates from the die slider 25, the wedge portion enters the receiving groove. The wedge portion also includes a limiting surface 112 located above the wedge surface 111. The limiting surface 112 abuts against the receiving groove to limit the die slider 25. When the upper die post 11 descends to its limit position, the limiting surface 112 contacts the die slider 25 and abuts against the die slider 25 in the horizontal direction. The die slider 25 supports the outer wall of the housing 3, which helps prevent the housing 3 from deforming when the side punch punches through the hole.

[0060] Preferably, the lower end of the die slider 25 is connected to the punch guide seat 22 by a spring. After the upper die mechanism 1 moves upward, the die slider 25 quickly returns to its original position under the action of the spring force.

[0061] Specifically, the lower die mechanism 2 also includes an ejector plate 24, on which a housing 3 is provided. The ejector plate 24 descends relative to the punch guide seat 22 and contacts the punch guide seat 22, thereby placing the housing 3 on the punch cover plate 23. Multiple conical bodies 242 are arranged circumferentially on the surface of the ejector plate 24, and the housing 3 is engaged with the conical bodies 242.

[0062] Preferably, the unloading plate 24 has guide protrusions 241 in the circumferential direction. The unloading plate 24 cooperates with the lower cover plate, lower fixing plate and other structures of the lower mold mechanism 2 for guidance, so as to prevent the unloading plate 24 and the housing 3 from rotating or shifting during the entire up and down movement.

[0063] In summary, the split punch structure and side punching die of this utility model for automotive airbag housings can ensure that the side punch always moves in the horizontal direction during the punching process, thereby improving the punching quality and avoiding damage to the die.

[0064] The above description is based on the preferred embodiments of this utility model. Through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A split-die structure for an automobile airbag housing, characterized by comprising: include: A pull rod (41), one end of which is a sloping push surface (411), and the other end of which has a connecting groove (412); A side hole punch (42) is pushed by a pull rod (41) and moves horizontally. One end of the side hole punch (42) has a connecting part (421), which is located in a connecting groove (412) and has a movable gap between the connecting part (421) and the connecting groove (412). The other end of the side hole punch (42) is movably connected to a guide block (43). Guide block (43), the distance between the guide block (43) and the pull rod (41) is set.

2. The split-die structure for an automobile airbag housing according to claim 1, wherein The connecting groove (412) has a receiving cavity and a limiting opening. A part of the connecting part (421) is movably disposed in the receiving cavity, and the other part is movably engaged with the limiting opening.

3. The split punch structure for automotive airbag housing according to claim 2, characterized in that, The connecting part (421) includes a reduced diameter section (4211) and an expanded diameter section (4212), the expanded diameter section (4212) being located within the receiving cavity, and the reduced diameter section (4211) being located within the limiting and closing opening.

4. The split punch structure for automotive airbag housing according to claim 3, characterized in that, A portion of the end face of the receiving cavity contacts the end face of the enlarged section (4212) to push the side hole punch (42) to translate.

5. The split punch structure for automotive airbag housing according to claim 1, characterized in that, The guide block (43) has a through guide hole, and the right end of the side hole punch (42) translates along the guide hole.

6. A side punching mold for automotive airbag housings, characterized in that, include: An upper mold mechanism (1) and a lower mold mechanism (2) are provided, wherein a housing (3) is provided on the lower mold mechanism (2), and the upper mold mechanism (1) moves downward to push the housing (3) and the lower mold mechanism (2); The lower mold mechanism (2) includes: Lower mold column (21); A punch guide seat (22) is located on the outer periphery of the lower die post (21) and is pushed by the upper die mechanism (1) to move toward the lower die post (21); A punch cover plate (23) is connected above the punch guide seat (22); A split punch structure (4) as described in any one of claims 1-4 is provided between the punch guide seat (22) and the punch cover plate (23); The split punch structure (4) moves downward relative to the lower die post (21), and the wedge part of the lower die post (21) pushes the pull rod (41) to translate, thereby causing the side hole punch (42) to extend in the horizontal direction.

7. The side punching die for an automotive airbag housing according to claim 6, characterized in that, The punch guide seat (22) and punch cover plate (23) close together to press the guide block (43).

8. The side punching die for an automotive airbag housing according to claim 6, characterized in that, The lower die mechanism (2) further includes a die slider (25) that can be translated in the horizontal direction. The die slider (25) is disposed outside the side hole punch (42), and the die slider (25) has a side hole die (26) facing the side hole punch (42).

9. The side punching die for an automotive airbag housing according to claim 8, characterized in that, The upper mold mechanism (1) is equipped with an upper mold column (11). The bottom of the upper mold column (11) has a wedge. The upper mold mechanism (1) drives the wedge to move downward and pushes the die slider (25) to move towards the side hole punch (42) and press against the outer wall of the housing.

10. The side punching die for an automotive airbag housing according to claim 9, characterized in that, The wedge portion includes a wedge surface (111), and the die slider (25) has an inclined surface that engages with the wedge surface (111) at one end away from the side hole die (26). The wedge surface (111) abuts against the inclined surface to push the die slider (25) to translate.

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