Stamping die for energy absorption box machining

Abstract

The invention relates to a stamping die for machining an energy absorption box, which comprises a fixed die provided with a second mounting plane, a positioning mechanism for positioning the energy absorption box, a movable die capable of moving along the direction close to or away from the fixed die, and a punching part arranged on a first mounting plane, and an abutting part with a fourth inclined surface is arranged below the punching part; a clamping mechanism is arranged on the second mounting plane and comprises a base fixed to the second mounting plane, an abutting plate rotationally connected with the base, an abutting piece slidably connected with the base and a clamping assembly arranged at an embedding groove of the abutting plate. According to the stamping die, through cooperation of the abutting part, the abutting part and the abutting plate, the to-be-punched area of the rib plate is reliably supported before punching, and the clamping part applies elastic force deviating from the second mounting plane through the elastic part so as to enhance the clamping stability; therefore, the problems that in the prior art, a rib plate punching area is insufficient in supporting, the punching force direction deviates, punching stress transmission is discontinuous, and punching precision is reduced, so that a punching head is prone to being damaged are effectively solved.

Description

Technical Field

[0001] The invention relates to a stamping die, in particular to a stamping die used for processing an energy absorption box. Background Art

[0002] As the passive safety performance of automobiles continues to improve, energy boxes are widely used in various types of vehicles as key energy absorption components. Energy boxes are usually made of lightweight and high-strength metal materials, and are equipped with multiple rib structures inside to guide the controlled deformation of the energy boxes during the collision, so as to disperse energy and protect the occupants. In the production and manufacturing process of energy boxes, it is necessary to use a stamping die to punch and cut specific areas of the ribs and box structure to form a preset induced deformation area, thereby ensuring that the energy box can effectively absorb energy according to the designed folding mode during a collision. Therefore, efficient and precise punching of the ribs inside the energy box has become an important technical link in the manufacturing process of the energy box.

[0003] In the existing punching process of energy absorption box, a multi-step punching method is usually used to complete the processing of the internal structure. Specifically, the lower and upper plates of the energy absorption box are first punched by a punching die to form a basic external opening; then, the longitudinally arranged ribs (longitudinal ribs) are punched in the internal cavity of the energy absorption box; finally, after the longitudinal ribs are punched, the internal transversely arranged ribs (transverse ribs) are punched. In the existing punching die structure, a simple fixed support block is usually set at the base of the energy absorption box to provide a certain support force for the ribs, or directly use the reaction force of the energy absorption box body for support. The punching piece is pressed against the ribs in the vertical direction to complete the punching action. On the whole, the existing support structure mainly relies on the natural contact between the ribs and the energy absorption box body or base, and the support method is relatively simple.

[0004] However, there are many problems with existing punching dies and processes. First, due to insufficient support in the punching area of ​​the rib plate, especially the edge area, local overhang is prone to occur during the punching process, causing the rib plate to partially yield or collapse when subjected to force; second, because the rib plate and the base are mainly supported by natural contact, the overall clamping effect is poor, and it is difficult to achieve reliable positioning and fixation of the rib plate before punching, which causes the direction of the punching force to easily shift, resulting in oblique shearing or even tearing; third, the stress transfer path between the rib plate and the die is discontinuous, and the punching load cannot be effectively transmitted back to the die base, further exacerbating the problems of decreased punching accuracy and loss of the punching head. Therefore, it is urgent to propose a new stamping die structure that can achieve stable clamping of the rib plate before punching and maintain a stable direction of the punching force during punching. Summary of the invention

[0005] The object of the present invention is to provide a stamping die which can realize stable clamping of a rib plate before punching and maintain uniform force during the punching process.

[0006] The technical solution adopted by the present invention to solve the above problem is: a stamping die for processing an energy absorption box, the energy absorption box includes an internal cavity, a rib plate is arranged in the internal cavity, the rib plate includes a to-be-punched area, and the to-be-punched area has a convex structure, including: A fixed mold including a second mounting plane; A positioning mechanism is arranged at the second mounting plane to limit the energy absorbing box on the second mounting plane when punching the rib plate; A movable mold is controlled to move toward or away from the fixed mold, wherein the movable mold includes a first mounting plane, the first mounting plane faces the second mounting plane, and the two are arranged in parallel; A punching piece, arranged on the first mounting plane; A supporting member, arranged on the side of the punching member facing the second mounting plane, and having a fourth inclined surface; A clamping mechanism, the clamping mechanism comprising: A base, fixedly connected to the second mounting plane, the base comprising a plug end, the plug end being inserted into the inner cavity of the energy absorption box and being located between the rib plate and the second mounting plane; an abutment plate, rotatably arranged on a side of the base away from the second mounting plane, the abutment plate comprising an abutment surface and a first inclined surface, the abutment surface being configured to abut against the side of the rib plate facing the second mounting plane when the stamping die is in a processing state; an embedding groove is provided on the abutment plate, and the shape and size of the embedding groove are the same as the shape and size of the area to be punched on the rib plate; an abutment member, slidably disposed between the abutment plate and the base, the abutment member comprising a second inclined surface and a third inclined surface, the second inclined surface being configured to apply a thrust directed toward the rib plate of the energy absorption box to the abutment plate when in contact with the first inclined surface, so that the abutment surface and the rib plate abut against the second mounting plane side; the third inclined surface being configured to move the abutment member toward the first inclined surface when in contact with the fourth inclined surface and relative movement occurs therebetween; Clamping assembly, comprising: A clamping member is arranged at the embedding groove in a manner parallel to the abutment surface and is restricted to move in a direction perpendicular to the abutment surface, and the shape and size of the clamping member are the same as the shape and size of the area to be punched of the rib plate; an elastic member, disposed between the clamping member and the embedding groove, so as to apply an elastic force to the clamping member in a direction away from the second mounting plane; The embedding groove is configured such that after the punching piece punches the area to be punched of the rib plate, the punched rib plate is located at the clamping piece and is pressed into the embedding groove by the punching piece.

[0007] Preferably, a first contoured groove matching with the protruding structure on the to-be-punched area of ​​the rib plate is formed on a side of the punching member facing the second mounting plane.

[0008] A second contoured groove matching the protruding structure on the area to be punched of the rib plate is formed on one side of the clamping member facing the first mounting plane.

[0009] Preferably, a guide hole is provided on the base, and an extending direction of the guide hole is parallel to a sliding direction of the abutment member.

[0010] The clamping mechanism also includes: A guide shaft, one end of which is connected to the abutment member, and the other end of which is movably inserted into the guide hole to limit the movement of the abutment member along the extension direction of the guide hole; A spring is sleeved on the outside of the guide shaft, and two ends of the spring are respectively in contact with the abutment member and the base.

[0011] In which, the stamping die includes a waste discharge state. When the stamping die is in the waste discharge state, the punching part moves with the movable die in a direction away from the fixed die, and the third inclined surface is separated from the fourth inclined surface, so that the abutment part moves a preset distance in a direction away from the first inclined surface under the elastic force of the spring, so that the third inclined surface is directed toward the upper edge of the movable die and the abutment plate that rotates relative to the base is connected to the lower edge of the abutment part side, so that the rib plate that has completed punching and is located on the clamping part slides down along the third inclined surface.

[0012] Preferably, a guide hole is provided at the embedding groove of the abutting plate.

[0013] The clamping assembly also includes: A guide post, one end of which is connected to the clamping member, and the other end of which passes through the guide hole; A limiting member is fixedly connected to one end of the guide column passing through the guide hole.

[0014] Preferably, the supporting member is provided with a first avoidance groove, and the first avoidance groove is configured to allow the guide column and the limiting member to pass through when the supporting member rotates relative to the base.

[0015] Preferably, the supporting member is provided with a second avoidance groove, the third inclined surface is constructed on one side of the inner wall of the second avoidance groove, and the second avoidance groove is configured so that when the supporting member moves toward the fixed mold along with the punching member, the fourth inclined surface of the supporting member can abut against the third inclined surface.

[0016] Preferably, the moving direction of the abutment member is defined as a first direction, and the base is provided with a limiting sliding groove along the first direction.

[0017] The abutment member is provided with a limiting slider, and the limiting slider is slidably disposed in the limiting slide groove. The limiting slider is configured to be restricted from moving along the first direction in the limiting slide groove when the abutment member and the base move relative to each other.

[0018] Preferably, the elastic member is configured to apply an initial reaction force to the clamping member before the punching member contacts the area to be punched of the rib plate.

[0019] The elastic member is configured to shrink synchronously with the movement of the clamping member toward the second mounting plane as the punching member continues to move toward the second mounting plane and presses the punched rib into the embedding groove, so that the punched rib enters the embedding groove.

[0020] Preferably, the preset distance is obtained by the following formula: The preset distance is defined as , The following formula should be satisfied: .

[0021] in, is the distance from the rotation axis of the abutment plate to the far end of the abutment surface, is the rotation angle of the abutment plate after the third inclined surface is completely separated from the fourth inclined surface.

[0022] Preferably, the first inclined surface is located on a side of the abutment plate facing the base, and a connection between an edge of the first inclined surface close to the movable mold side and a side of the abutment plate facing the base is configured as an arc chamfer.

[0023] The beneficial effects of the embodiments of the present invention are as follows: 1. The stamping die adopts a clamping mechanism arranged at the second installation plane of the fixed die, and the clamping mechanism includes an abutment plate rotatably connected to the base, an abutment member slidably connected to the base and a clamping assembly arranged at the embedding groove, and the abutment member, the abutment member and the inclined surface of the abutment plate cooperate to realize the technical means of pre-clamping and supporting the area to be punched of the rib plate. Therefore, the problems of insufficient support of the punching area of ​​the rib plate, deviation of the punching force direction during the punching process, discontinuity of the punching stress transmission path and decreased punching accuracy leading to easy damage of the punching head in the prior art are effectively solved, thereby realizing the technical effects of forming a stable and reliable clamping of the area to be punched of the rib plate before punching, maintaining a stable direction of the punching force during the punching process, uniformly transmitting the punching load and having excellent punching quality.

[0024] 2. The stamping die, on the basis of realizing the technical means of stably clamping the area of ​​the rib plate to be punched by the clamping mechanism before punching, ensuring the stability of the punching force direction and forming a continuous force path during the punching process, further adopts a guide hole on the base, a guide shaft is set between the abutment and the base, and a spring is sleeved on the outside of the guide shaft. When the stamping die is in the waste discharge state, the abutment moves a preset distance in the first direction under the action of the spring elastic force, thereby causing the third inclined surface to separate from the fourth inclined surface, and the abutment plate automatically rotates due to the loss of support, and a continuous sliding surface is formed with the edge of the abutment facing the movable mold side to guide the discharge of the waste under punching. Therefore, on the basis of realizing the technical effect of reliable clamping of the rib plate and ensuring the punching accuracy, the problem of waste retention, poor waste discharge and mold jamming after the rib plate punching is completed in the prior art is effectively further solved, thereby collaboratively realizing the comprehensive technical effect of smoothly guiding the waste to slide and discharge after the punching is completed while ensuring the punching quality of the rib plate, improving the continuous operation efficiency of the mold, and reducing the failure rate and maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic exploded view of a stamping die proposed in an embodiment of the present invention is shown.

[0026] Figure 2 A schematic cross-sectional view of a stamping die proposed in an embodiment of the present invention is shown.

[0027] Figure 3 A schematic structural diagram of a punching piece in a punching state provided in an embodiment of the present invention is shown.

[0028] Figure 4 A schematic cross-sectional view of a punching piece in a punching state provided in an embodiment of the present invention is shown.

[0029] Figure 5 A schematic side view of a punching piece in a punching state provided in an embodiment of the present invention is shown.

[0030] Figure 6 A schematic exploded view of a clamping mechanism according to an embodiment of the present invention is shown. Figure 1 .

[0031] Figure 7 A schematic exploded view of a clamping mechanism according to an embodiment of the present invention is shown. Figure 2 .

[0032] Figure 8 A schematic structural diagram of the energy absorption box mentioned in the present invention is shown.

[0033] Fig. 9 A schematic cross-sectional view of the energy absorption box mentioned in the present invention is shown.

[0034] Fig.10 A schematic structural diagram of the transverse rib plate mentioned in the present invention is shown.

[0035] Among them: 10, fixed mold; 110, first installation plane; 20, movable mold; 210, second installation plane; 30, positioning mechanism; 40, punching member; 410, first profiling groove; 420, plug-in hole; 50, abutment member; 510, fourth inclined surface; 60, clamping mechanism; 610, base; 611, plug-in end; 612, guide hole; 613, limit slide; 620, abutment plate; 621, abutment surface; 622, first inclined surface; 623, embedded groove; 623 1. Guide hole; 624. Arc chamfer; 630. Abutment member; 631. Second inclined surface; 632. Third inclined surface; 633. Limiting slider; 634. First avoidance groove; 635. Second avoidance groove; 640. Clamping assembly; 641. Clamping member; 642. Elastic member; 643. Guide column; 644. Limiting member; 650. Guide shaft; 660. Spring; 70. Rod member; 710. Expansion structure; 80. Elastic member; 90. Energy absorption box; 910. Transverse rib plate. DETAILED DESCRIPTION

[0036] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description created by the present application, unless otherwise specified, "multiple" means two or more.

[0038] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0039] Figure 8 A schematic structural diagram of the energy absorption box mentioned in the present invention is shown. Fig. 9 A schematic cross-sectional view of the energy absorption box mentioned in the present invention is shown. Fig.10 A schematic structural diagram of the transverse rib plate mentioned in the present invention is shown.

[0040] In a preferred embodiment of the present application, a stamping die is provided. The target object of the stamping die is a shell structure having an internal cavity and a rib plate in the internal cavity. Figures 8 to 10 Taking the energy absorption box 90 as an example, a rib plate is usually arranged inside the energy absorption box 90. During the manufacturing process of the energy absorption box 90, it is necessary to punch and cut specific areas of the rib plate and the box structure through a stamping die to form a preset induced deformation area, so as to ensure that the energy absorption box 90 can effectively absorb energy according to the designed folding mode during a collision, so as to guide the controlled deformation of the energy absorption box 90 during the collision, so as to achieve the purpose of dispersing energy and protecting the occupants. The internal rib plates of the energy absorption box 90 applicable to the present application include two types: vertical rib plates and transverse rib plates 910. In order to remove the local rib plates in a specific area, it is necessary to process the energy absorption box 90 in a specific punching sequence. For example, the stamping die in the present application is mainly used for punching the energy absorption box 90 after the upper and lower edges and the vertical rib plates are punched. This is because the original upper and lower edges and the vertical rib plates of the energy absorption box 90 will hinder the punching of the area to be punched of the transverse rib plate 910. Furthermore, because it is difficult for the existing punching head to punch cleanly the connection between the vertical rib plate and the transverse rib plate 910, after the vertical rib plate is punched, part of the side of the transverse rib plate 910 of the energy absorbing box 90 will remain in the area connected to the transverse rib plate, i.e., the convex structure described later. The stamping die proposed in this application is designed for processing the energy absorbing box with the vertical rib plate (convex structure) remaining at the connection with the transverse plate rib.

[0041] It should be noted that the existing mold for punching the rib plate inside the energy absorption box 90 usually has a support member that abuts against the rib plate in the punching direction, so as to provide reverse support for the rib plate during the punching process. For example, if the punching direction is in the negative direction of the Z axis, the support member will provide support force for the rib plate along the positive direction of the Z axis. However, in order to cut off the rib plate in the area to be punched, an avoidance groove is often provided at the position on the support member corresponding to the area to be punched of the rib plate, so that the punching head can cut off the area to be punched of the rib plate. Taking the punching direction toward the negative direction of the Z axis as an example, the support member is below the rib plate, and the top of the support member below the rib plate will be provided with an avoidance groove to reserve a punching stroke for the punching head, so that the rib plate in the area to be punched can be smoothly cut off. In this process, the area to be punched of the rib plate will be in a relatively suspended state. Please refer to Figure 2 and Fig. 9 .

[0042] Figure 1 A schematic exploded view of a stamping die proposed in an embodiment of the present invention is shown. Figure 2 A schematic cross-sectional view of a stamping die proposed in an embodiment of the present invention is shown. Figure 3 A schematic structural diagram of a punching piece in a punching state provided in an embodiment of the present invention is shown. Figure 4 A schematic cross-sectional view of a punching piece in a punching state provided in an embodiment of the present invention is shown. Figure 5 A schematic side view of a punching piece in a punching state provided in an embodiment of the present invention is shown. Figure 6 A schematic exploded view of a clamping mechanism according to an embodiment of the present invention is shown. Figure 1 . Figure 7 A schematic exploded view of a clamping mechanism according to an embodiment of the present invention is shown. Figure 2 .

[0043] See also Figures 1 to 7. The stamping die includes a fixed die 10, a positioning mechanism 30, a movable die 20, a punching piece 40, a supporting piece 50 and a clamping mechanism 60. Among them, the fixed die 10 includes a second mounting plane 210, and the second mounting plane 210 includes a preset area for placing an energy absorption box 90. The positioning mechanism 30 is arranged at the second mounting plane 210 to limit the energy absorption box 90 to the preset area when punching the rib plate. The movable die 20 is controlled to move toward or away from the fixed die 10, and the movable die 20 includes a first mounting plane 110, the first mounting plane 110 is parallel to the second mounting plane 210, and the first mounting plane 110 is arranged toward the second mounting plane 210. The punching piece 40 is arranged on the first mounting plane 110. The supporting piece 50 is arranged on the side of the punching piece 40 facing the second mounting plane 210, and a fourth inclined surface 510 is constructed on the supporting piece 50. The clamping mechanism 60 is arranged at the second mounting plane 210, and the clamping mechanism 60 includes a base 610, an abutment plate 620, an abutment member 630 and a clamping assembly 640, wherein the base 610 is fixedly connected to the second mounting plane 210, and the base 610 includes a plug end 611, and the plug end 611 is inserted into the inner cavity of the energy absorption box 90 and is located between the transverse rib plate and the second mounting plane 210; the abutment plate 620 is arranged on the base 610 away from the second The abutment plate 620 is disposed on one side of the mounting plane 210 and is rotatably connected to the base 610. The abutment plate 620 includes an abutment surface 621 and a first inclined surface 622. The abutment surface 621 is configured to abut against the side of the rib plate facing the second mounting plane 210 when the stamping die is in a processing state. The abutment plate 620 is provided with an embedding groove 623. The shape and size of the embedding groove 623 are the same as the shape and size of the area to be punched. The abutment member 630 is disposed between the abutment plate 620 and the base 610. The abutment member 630 is slidably connected to the base 610, and the abutment member 630 includes a second inclined surface 631 and a third inclined surface 632. The second inclined surface 631 is configured to make the abutment surface 621 of the abutment plate 620 abut against the rib plate toward the second mounting plane 210 when the second inclined surface 631 is in contact with the first inclined surface 622; the third inclined surface 632 is configured to make the abutment member 630 move toward the side close to the abutment member 630 when the third inclined surface 632 is in contact with the fourth inclined surface 510 and relative movement occurs therebetween. The clamping member 641 is arranged at the embedding groove 623 and is restricted to move in a direction perpendicular to the abutting surface 621. The shape and size of the clamping member 641 are the same as the shape and size of the area to be punched on the rib plate. The elastic member 642 is arranged between the clamping member 641 and the embedding groove 623 to apply an elastic force to the clamping member 641 in a direction away from the second mounting plane 210.Furthermore, the embedding groove 623 is configured such that after the punching piece 40 punches the area to be punched of the rib plate, the punched rib plate is located at the clamping piece 641 and is pressed into the embedding groove 623 by the punching piece 40 .

[0044] Specific: A preset area for placing the energy absorbing box 90 is provided on the second installation plane 210 on the fixed mold 10 to support the energy absorbing box 90 body.

[0045] The positioning mechanism 30 is disposed at the second mounting plane 210 to limit the position deviation of the energy absorbing box 90 during the punching process to ensure the punching accuracy.

[0046] The movable mold 20 can be controlled to move in a vertical direction (towards or away from the fixed mold 10 ), and a first mounting plane 110 is provided on the movable mold 20 , which is parallel to and opposite to the second mounting plane 210 .

[0047] The punching member 40 is installed on the first installation plane 110 and is used to apply a punching force to a specific area of ​​the rib plate along a vertical direction.

[0048] The abutment member 50 is disposed below the punching member 40 and faces the second mounting plane 210. A fourth inclined surface 510 is disposed on the abutment member 50 for cooperating with other mechanisms. In addition, the abutment member 50 is movably connected with the punching member 40. A rod 70 is disposed at one end of the abutment member 50 facing the punching member 40. A plug hole 420 is provided at one side of the punching member 40 facing the abutment member 50. An end of the rod 70 facing away from the abutment member 50 is plugged into the plug hole 420. An elastic member 80 is disposed between the punching member 40 and the abutment member 50. The elastic member 80 applies an elastic force to the abutment member 50 to move away from the punching member 40. Furthermore, in order to prevent the supporting member 50 from falling off and separating from the punching member 40, an expansion structure 710 is provided at the end of the rod 70 away from the supporting member 50, and the inner diameter of the end of the plug-in hole 420 away from the supporting member 50 matches the expansion structure 710 to limit the rod 70 from falling out of the plug-in hole 420.

[0049] The clamping mechanism 60 is arranged at the second mounting plane 210 of the fixed mold 10, wherein the base 610 is fixedly connected to the second mounting plane 210, and the base 610 is provided with a plug-in end 611, which extends to the internal cavity of the energy absorption box 90 and is located below the rib plate to provide preliminary support. In the present application, the extension direction of the plug-in end 611 is parallel to the horizontal plane, and the plug-in end 611 is located below the transverse rib plate 910 after being incorporated into the internal cavity of the energy absorption box 90, that is, between the transverse rib plate 910 and the second mounting plane 210, and the side of the plug-in end 611 facing away from the second mounting plane 210 should be in contact with the side of the transverse rib plate 910 facing the second mounting plane 210, thereby supporting the transverse rib plate 910 in the vertical direction. The abutment plate 620 is rotatably connected to the base 610. Specifically, the abutment plate 620 is rotatably connected to the base 610 through a rotating shaft at one end away from the punching position of the punching die, which is specifically embodied as a hinge. In addition, the abutment plate 620 is installed on the side of the base 610 away from the second mounting plane 210, and the abutment plate 620 is provided with an abutment surface 621 and a first inclined surface 622. The abutment surface 621 should be in contact with the bottom surface of the transverse rib plate 910 (the side facing the second mounting plane 210) before the punching die is closed, and the first inclined surface 622 is linked with the second inclined surface 631 on the abutment member 630. In addition, the abutment plate 620 is provided with an embedding groove 623 on the side away from the abutment surface 621, and the embedding groove 623 corresponds to the punching position of the punching head and the area to be punched of the transverse rib plate 910 in the energy absorption box 90. The abutment member 630 is slidably arranged between the base 610 and the abutment plate 620, and is provided with a second inclined surface 631 (cooperating with the first inclined surface 622 of the abutment plate 620) and a third inclined surface 632 (cooperating with the fourth inclined surface 510 of the abutment member 50). During the punching and cutting action of the punching die, the abutment member 630 moves along the horizontal plane toward the direction close to the first inclined surface 622 under the action of the fourth inclined surface 510 of the abutment member 50, and through the cooperation of the second inclined surface 631 and the first inclined surface 622, the abutment plate 620 is rotated, so that the abutment surface 621 abuts against the side of the transverse rib plate 910 in the energy absorption box 90 facing the second mounting plane 210, thereby completing the vertical support of the transverse rib plate 910 in the energy absorption box 90. The clamping assembly 640 includes a clamping member 641 and an elastic member 642. The clamping member 641 is installed in the embedding groove 623 on the abutment plate 620 and is arranged parallel to the abutment surface 621. Its shape and size are consistent with the area to be punched. The elastic member 642 is arranged between the clamping member 641 and the embedding groove 623 to apply an upward elastic force to the clamping member 641 to provide stable pre-compression support.Furthermore, the depth of the embedding groove 623 is configured so that when the punching head moves toward the fixed mold 10 and punches the area to be punched of the rib plate, the punched rib plate is placed on the clamping member 641 and is pressed into the embedding groove 623 by the punching member 40. At this time, the minimum distance from the rib plate in the embedding groove 623 to the abutment surface 621 is a positive number, that is, there is a spacing between the top surface of the rib plate in the embedding groove 623 and the abutment surface 621 of the abutment plate 620.

[0050] It should be noted that, when the supporting member 50 moves with the punching member 40 toward the transverse rib 910 close to the energy absorption box 90, the fourth inclined surface 510 is in contact with the third inclined surface 632 to push the supporting member 630 to move toward the first inclined surface 622, so that the abutment plate 620 rotates and the abutment surface 621 abuts against the bottom surface of the transverse rib 910. Due to the setting of the elastic member 80 between the supporting member 50 and the punching member 40, the punching member 40 can continue to move downward, thereby completing the local punching work of the transverse rib 910. It can be understood that the elastic modulus of the elastic member 80 needs to be configured so that when the abutment surface 621 of the abutment plate 620 abuts against the bottom surface of the transverse rib plate 910, the elastic member 80 can only be slightly compressed, and only when the abutment surface 621 is completely abutted against the bottom surface of the transverse rib plate 910, the elastic member 80 will continue to shrink under the downward pressure of the punching member 40, that is, the fourth inclined surface 510 and the third inclined surface 632 cooperate to push the abutment member 630 to move toward the first inclined surface 622, and the reaction force applied to the supporting member 50 during the rotation of the abutment plate 620 through the cooperation of the first inclined surface 622 and the second inclined surface 631 cannot cause a significant compression of the elastic member 80.

[0051] In the actual working process of the stamping die, the overall operation process is as follows: The energy absorption box 90 product to be processed is placed in a preset area on the second mounting plane 210 of the fixed mold 10, and is limited and fixed by the positioning mechanism 30; The movable mold 20 and the punching member 40 move in the vertical direction toward the fixed mold 10. When punching the to-be-punched area of ​​the transverse rib plate 910, the abutting member 50 below the punching member 40 pushes the third inclined surface 632 of the abutting member 630 through the fourth inclined surface 510, so that the abutting member 630 moves toward the direction close to the first inclined surface 622 under the pushing action, and at the same time pushes the first inclined surface 622 of the abutting plate 620 through the second inclined surface 631, so that the abutting plate 620 rotates and its abutting surface 621 is tightly abutted against the bottom surface of the rib plate. After the abutting surface 621 of the abutting plate 620 completes the support and fixation of the bottom of the rib plate, the clamping member 641 applies pre-pressure to the transverse rib plate 910 under the action of the elastic member 642, thereby forming an abutting support for the area to be punched of the transverse rib plate 910; The movable mold 20 continues to move downward, and the punching piece 40 contacts the upper surface of the rib plate and applies a punching force, and the area of ​​the rib plate to be punched is cut off by the punching piece 40, and the cut off area slides into the embedding groove 623 for collection; After the punching is completed, the movable mold 20 rises up along with the punching piece 40, the abutting piece 50 and the abutting piece 630 are released from the inclined contact, the abutting state is released, and the remaining part of the transverse rib plate 910 remains intact.

[0052] In this embodiment, the clamping mechanism 60 works in coordination, and through the linkage of the abutting member 50, the abutting member 630, the abutting plate 620 and the clamping assembly 640, the bottom and top surfaces of the rib plate are reliably clamped before punching, effectively preventing the rib plate from being suspended in the air under force. In addition, the elastic member 642 provides flexible support, and the elastic member 642 in the clamping assembly 640 can pre-apply a stable elastic force before punching, ensuring that the clamping member 641 always maintains stable contact with the bottom surface of the rib plate, preventing the rib plate from lifting or vibrating during punching. The depth design of the embedded groove 623 not only ensures the effective accommodation of the rib plate waste, but also prevents the rib plate waste from being suspended in the air or being clamped unstably during punching.

[0053] In this embodiment, a clamping mechanism 60 is provided at the second mounting plane 210 of the fixed mold 10, and the clamping mechanism 60 includes an abutment plate 620 rotatably connected to the base 610, an abutment member 630 slidably connected to the base 610, and a clamping member 641 provided at the embedding groove 623. The abutment member 50, the abutment member 630 and the inclined surface of the abutment plate 620 cooperate to preliminarily realize the clamping support of the rib plate before the punching member 40 contacts the area to be punched of the rib plate. Therefore, the following technical effects can be effectively achieved: Prevent local yielding and collapse of the rib plate: Since the area of ​​the rib plate to be punched is clamped by the clamping mechanism 60 before punching, it can effectively prevent the rib plate from local yielding, bending or collapse due to suspension or insufficient support during the punching process, thereby improving the overall stability of the rib plate forming.

[0054] Preventing skew shearing caused by deviation of the punching force direction: By fully fitting the clamp 641 with the bottom surface of the rib plate, the rib plate is evenly stressed during the punching process, avoiding deviation of the punching force direction, effectively preventing skew shearing, tearing or punching edge burrs caused by changes in the punching angle, and improving the punching quality.

[0055] Realize continuous feedback of punching load: Since the abutment plate 620 is rigidly connected to the second mounting plane 210 through the base 610, the punching load generated by the rib plate during the punching process can form a complete and continuous force transmission path through the clamping mechanism 60 and be effectively transmitted back to the mold base, avoiding stress concentration and reducing the risk of fatigue damage to the mold structure.

[0056] Improve punching accuracy and extend the service life of the punching piece 40: By forming a stable clamping fixation on the area to be punched of the rib plate before punching, the structural deformation and punching error during the punching process can be significantly reduced, and the stability of the punching position and direction can be maintained, thereby improving the punching accuracy and reducing the risk of wear or damage of the punching piece 40 (punching head) due to off-center load, thereby extending the service life of the punching head.

[0057] Adapting to the complex structural changes in the multi-step punching process of the energy absorption box 90: The clamping mechanism 60 of the present invention can adapt to the irregular surface of the transverse ribs caused by the residual longitudinal ribs punching during the three-step punching process of the energy absorption box 90, ensuring that after the longitudinal ribs are punched, it can still provide effective lower support and clamping for the transverse ribs, thereby improving the punching consistency and reliability during complex structure processing.

[0058] In some embodiments, the elastic member 642 is configured to apply an initial reaction force to the clamping member 641 before the punching member 40 contacts the area to be punched of the rib plate. In addition, the elastic member 642 is also configured to shrink synchronously with the movement of the clamping member 641 toward the second mounting plane 210 during the process in which the punching member 40 continues to move toward the second mounting plane 210 and presses the punched rib plate into the embedding groove 623, so that the punched rib plate enters the embedding groove 623.

[0059] This embodiment involves the timing coordination problem between the clamping mechanism 60 and the punching action, that is, before the punching head contacts the rib plate, only the clamping member 641 (in cooperation with the elastic member 642) pre-supports the area of ​​the rib plate to be punched from the bottom; when the punching head contacts the rib plate, the upper and lower surfaces of the rib plate are completely clamped; during the continued downward movement of the punching head, the clamping member 641 needs to give way synchronously but still provide reaction force, so that the punching head presses the cut part into the groove 623. During the whole process, the clamping member 641 should not be accidentally compressed or moved down before the punching contact, otherwise the support will fail, causing the rib plate to deform or tear. The clamping behavior can be broken down into the following three stages: The first stage: the "pre-contact clamping" stage before punching, the clamping member 641 supports the bottom of the rib plate from below under the action of the elastic member 642. The purpose is to provide stable support for the rib plate from below to prevent it from sinking due to gravity and mold vibration. In addition, the clamping member 641 must remain stationary at this time and cannot slide down prematurely due to weak elasticity.

[0060] The second stage: the punching contact forms the "formal clamping" stage, and the punching piece 40 touches the upper surface of the rib plate to form an upper and lower clamping structure. The purpose is to make the rib plate enter a passive controlled state to resist lateral displacement and Z-axis (vertical) bounce. In addition, the reaction force of the punching force can gradually compress the elastic piece 642 at this time, but the clamping force must be transmitted stably.

[0061] The third stage: the punching continues to press down, and the clamping member 641 "gives way and releases" stage. The rib plate is punched off, and the clamping member 641 moves downward under the combined action of the punching member 40 and the elastic member 642. The purpose is to press the separated rib plate waste into the embedded groove 623 while maintaining the stability of the sliding path. In addition, the clamping member 641 needs to move smoothly and without shaking or jamming during the downward movement to maintain the guiding function.

[0062] The determining factor of whether the clamping member 641 is “remaining stationary” is the initial resistance pressure F of the elastic member 642. 弹 Is the (initial reaction force) greater than the disturbance force F before punching contact? 扰 . F 扰 It mainly includes the self-weight of the rib plate (negligible), the impact vibration force of the mold closing, and the early non-contact disturbance. According to experience (see Table 1 below), F 扰 It is approximately between 10N and 20N. Therefore, as long as the initial setting elasticity of the elastic member 642 is greater than 20N, the requirement of "the clamping member 641 does not move downward before the punching contact" can be met.

[0063]

[0064] Initial resistance F of elastic member 642 弹 The calculation formula of (initial reaction force) is as follows: Theoretical formula expression: .

[0065] Among them, F 扰 is the disturbance force (the above estimate is 20N), is the safety factor (recommended to be between 1.5 and 2), F 弹初 It is the initial resistance of the elastic member.

[0066] therefore, .

[0067] Assuming that a compression spring or rubber block is used, the parameters of the elastic member 642 can be further designed: the selected compression amount δ 0 (Initial compression). Generally, 3mm to 5mm is set as the preload compression stroke.

[0068] Calculate the required stiffness k: .

[0069] Assume that a pair of compression springs are used to support the clamp 641: F 扰 is 20N, 1.75, F 弹初 35N, δ 0 5mm, (Stiffness) is 35 / 5 = 7N / mm. Therefore, you can choose a compression spring that provides 35N reaction force when the preload is 5mm and has a stiffness of 7N / mm.

[0070] See also Figure 2 and Figure 4 In order to ensure the continuity of punching by the stamping die, the punched rib waste needs to be quickly discharged from the punching die. Therefore, in some embodiments, a guide hole 612 is provided on the base 610, and the extension direction of the guide hole 612 is parallel to the sliding direction of the abutment 630; the clamping mechanism 60 also includes a guide shaft 650 and a spring 660, one end of the guide shaft 650 is connected to the abutment 630, and the other end of the guide shaft 650 is movably inserted in the guide hole 612 to limit the movement of the abutment 630 along the extension direction of the guide hole 612, and the spring 660 is sleeved on the outside of the guide shaft 650, and the two ends of the spring 660 are respectively in abutment with the abutment 630 and the base 610. In which, the stamping die includes a waste discharge state. When the stamping die is in the waste discharge state, the punching part 40 moves with the movable die 20 in the direction away from the fixed die 10, and the third inclined surface 632 is separated from the fourth inclined surface 510, so that the abutment part 630 moves a preset distance in the direction away from the first inclined surface 622 under the elastic force of the spring 660, so that the third inclined surface 632 is directed toward the upper edge of the movable die 20 and the abutment plate 620 that rotates relative to the base 610 is connected to the lower edge of the abutment part 630 side, so that the rib plate waste that has been punched and located on the clamping part 641 slides down along the third inclined surface 632.

[0071] Furthermore, in order to clearly explain the operating state of the clamping assembly 640, please refer to Figure 7 A guide hole 6231 is provided at the embedding groove 623 of the abutment plate 620; the clamping assembly 640 also includes a guide column 643 and a limit member 644, wherein one end of the guide column 643 is connected to the clamping member 641, and the other end of the guide column 643 passes through the guide hole 6231, and the limit member 644 is fixedly connected to one end of the guide column 643 passing through the guide hole 6231.

[0072] Specific: A guide hole 612 is provided in the base 610 . The guide hole 612 extends along the sliding direction of the abutment 630 and is mainly used to limit the moving trajectory of the abutment 630 and guide the abutment 630 to move stably along a specified direction.

[0073] One end of the guide shaft 650 is connected to the abutment 630, and the other end is movably inserted into the guide hole 612 provided in the base 610. The guide shaft 650 is used to connect the abutment 630 and the base 610, and limit the abutment 630 to move only along the extension direction of the guide hole 612 to prevent the abutment 630 from deflecting or abnormal posture.

[0074] The spring 660 is sleeved on the outside of the guide shaft 650, and the two ends of the spring 660 are respectively in contact with the abutment 630 and the base 610. The spring 660 stores elastic potential energy under a controlled compression state, and is used to push the abutment 630 to move a preset distance in a direction parallel to the first direction (i.e., a direction away from the first inclined surface 622) during the waste discharge stage.

[0075] The abutment plate 620 is provided with an embedding groove 623, and a guide hole 6231 is opened on the side close to the abutment member 630. The clamping assembly 640 includes a clamping member 641, an elastic member 642, a guide column 643 and a limit member 644. The clamping member 641 is arranged at the embedding groove 623 of the abutment plate 620, and its shape and size are consistent with the area to be punched of the rib plate, and is used to form a stable fit with the bottom surface of the rib plate before punching. One end of the guide column 6231 is connected to the clamping member 641, and the other end passes through the guide hole 645 provided on the abutment plate 620. The limit member 644 is fixed to one end of the guide column 643 passing through the guide hole 6231, so as to prevent the clamping member 641 from detaching from the abutment plate 620 during elastic compression or release, thereby ensuring reliable guiding and limiting of the clamping assembly 640. The elastic member 642 is arranged between the clamping member 641 and the abutment member 630 to provide elastic support for the clamping member 641. Through the cooperation of the above-mentioned structure, the clamping assembly 640 can not only realize reliable clamping of the rib plate, but also cooperate with the waste discharge mechanism after the punching is completed to realize rapid and smooth discharge of waste.

[0076] In the clamping preparation stage, the energy absorbing box 90 is placed in a preset area of ​​the fixed mold 10 and is fixed by the positioning mechanism 30. The movable mold 20 drives the punching piece 40 and the abutting piece 50 to move downward toward the fixed mold 10. The fourth inclined surface 510 of the abutting piece 50 first contacts the third inclined surface 632 of the abutting piece 630 and pushes the abutting piece 630 to move along the guide hole 612. The abutting piece 630 pushes the abutting plate 620 via the second inclined surface 631 to rotate the abutting plate 620, thereby making the abutting surface 621 abut against the bottom surface of the rib plate. The clamping piece 641 flexibly fits with the bottom surface of the rib plate under the action of the spring 660 to achieve clamping and fixing of the rib plate to be punched. In the punching stage, the movable mold 20 moves further downward, the punching piece 40 contacts the upper surface of the rib plate and performs punching. The rib plate to be punched is cut off, and the cut waste part falls into the embedded groove 623 of the abutting plate 620. In the waste discharge preparation stage, after the punching is completed, the movable mold 20 rises along with the punching piece 40 in the direction away from the fixed mold 10, and the fourth inclined surface 510 of the abutting piece 50 gradually separates from the third inclined surface 632 of the abutting piece 630. After the abutting piece 630 loses the upward thrust, it automatically moves in the direction away from the first inclined surface 622 along the guide hole 612 under the action of the elastic force stored in the spring 660. In the waste discharge stage, as the abutting piece 630 moves, the abutting plate 620 loses support and rotates freely, and the edge of the abutting surface 621 of the abutting plate 620 butts with the edge of the abutting piece 630 on the side facing the movable mold 20, forming a continuous sliding surface. The rib plate waste slides smoothly under the guidance of gravity and the sliding surface, completing the waste discharge action. Finally, in the reset preparation stage, as the waste is discharged, at the beginning of the next cycle of punching action, the movable mold 20 moves down, and the punching member 40 drives the abutment member 50 to re-contact the abutment member 630 to achieve mechanism reset and prepare for the next punching cycle.

[0077] In the above process, it is necessary to ensure that the abutment 630 only slides in a predetermined direction during movement to avoid posture deviation leading to unstable clamping or abnormal waste discharge. The spring 660 needs to accurately control the movement of the abutment 630 to the preset waste discharge position through a limited preload and release stroke to ensure consistent and reliable waste discharge. After the abutment plate 620 loses the support of the abutment 630, it can rotate freely under the action of gravity, quickly open the waste discharge channel, and guide the waste to slide smoothly. In addition, the guide column 643 and the limit member 644 jointly prevent the clamping member 641 from detaching or abnormally displacing during the elastic action, ensuring the continuity and reliability of the clamping and waste discharge actions.

[0078] In this embodiment, a guide hole 612 is set on the base 610, a guide shaft 650 is set between the abutment 630 and the base 610, and a spring 660 is installed, so that the abutment 630 can realize automatic controlled movement in the waste discharge stage. At the same time, a sliding surface is formed by the rotation of the abutment plate 620, which effectively guides the punching waste to be discharged smoothly and avoids waste retention and jamming, thereby ensuring the continuity and rhythm stability of the rib plate punching operation of the energy absorption box 90, and improving the overall operation efficiency of the mold; in addition, through the cooperation of the guide column 643 and the limit member 644 in the clamping assembly 640, the reliability of the rib plate clamping action is further enhanced, preventing the clamping member 641 from falling off or abnormal displacement, thereby reducing the overall failure rate and maintenance frequency of the mold, and significantly improving the operation stability and production economy of the energy absorption box 90 stamping production line.

[0079] Furthermore, the preset distance is obtained by the following formula: The preset distance is defined as , satisfy: ; in, is the distance from the rotation axis of the abutment plate 620 to the far end of the abutment surface 621, is the rotation angle of the contact plate 620 after the third inclined surface 632 is completely separated from the fourth inclined surface 510 .

[0080] Specific: After punching, the abutment member 630 moves to a preset position (distance) along the “first direction” under the push of the spring 660. , so that its edge close to the movable mold direction is butted against the lower edge of the abutment plate 620 after it rotates around the axis, thereby forming a sliding surface to enable the waste to slide and be discharged.

[0081] : The length of the abutment plate 620 from the rotation axis to the lower edge (the farthest end of the abutment surface 621) (the component is known) can be measured and determined in the actual structure.

[0082] : The angle of rotation of the abutment plate 620 around the axis after release (waste discharge state, recommended to be 25° to 45°).

[0083] : The horizontal distance that the abutment member 630 needs to retreat, that is, the required "preset distance", can be inferred from the waste discharge action.

[0084] The first direction is a horizontal direction.

[0085] When the abutment plate 620 is released from the vertical clamping state, the angle of rotation around the axis is , the horizontal projection movement distance of its lower end should be equal to the retreat distance of the abutment member 630 (i.e. ): .

[0086] In the extension and contraction stroke of the spring 660, in order for the spring 660 to complete this displacement and enter the "unresistance state", the maximum compression stroke should be no less than , the initial compression (pre-compression during assembly) can be 3 to 5 mm. In addition, the elastic force of spring 660 = the friction force to be overcome + the structural sliding resistance + the possible gravity component. In addition, a small amount of "residue" can be slightly reserved at the end of spring 660 to ensure that the positioning will not be stuck.

[0087] Please refer to Figure 1 , Figure 6 and Fig.10 In some embodiments, in order to further improve the surface fit between the punching member 40 and the abutting member 50 and the transverse rib plate 910 in the energy absorption box 90 during punching, the punching member 40 is provided with a first profiling groove 410 adapted to the protruding structure on the rib plate in the area to be punched on the side facing the second mounting plane 210. The clamping member 641 is provided with a second profiling groove (not shown in the figure) adapted to the protruding structure on the rib plate in the area to be punched on the side facing the first mounting plane 110.

[0088] Specific: The first profiling groove 410 can be a local shallow concave, a strip groove, a semicircular groove, or can be customized according to the specific contour of the rib plate protrusion, so as to achieve the precise fit between the punching piece 40 and the protrusion structure on the rib plate surface. The second profiling groove is also designed according to the protrusion shape of the rib plate to be punched, and is adapted to the protrusion structure at the bottom of the rib plate. Through the profiling design of the clamping piece 641, good covering support can be achieved on both the upper and lower surfaces of the rib plate to be punched, further improving the clamping stability.

[0089] The above-mentioned contoured groove design is closely matched with the actual structure of the rib plate, ensuring that before the punching operation begins, the punching member 40 and the clamping member 641 can fully fit with the raised surface of the rib plate, thereby avoiding uneven force or offset in the initial punching stage.

[0090] After the initial positioning of the mold, the energy absorption box 90 is placed on the second mounting plane 210 of the fixed mold 10, and the area of ​​the rib plate to be punched is opposite to the punching piece 40 and the clamping piece 641. The movable mold 20 drives the punching piece 40 and the abutting piece 50 to move toward the fixed mold 10, and the clamping mechanism 60 (abutment plate 620, clamping piece 641) acts synchronously to make the clamping piece 641 abut against the bottom surface of the rib plate. Since the punching piece 40 is provided with a first profiling groove 410 and the clamping piece 641 is provided with a second profiling groove, the two are precisely fitted with the raised structures on the surface and bottom of the rib plate, respectively, to form a double-sided covering clamping, and then the punching piece 40 continues to apply pressure to complete the punching and cutting of the area of ​​the rib plate to be punched. The existence of the profiling structure ensures that the rib plate is evenly stressed and fits stably during the entire punching process, avoiding deflection, tearing or shear deformation.

[0091] The first profiling groove 410 is consistent with the convex shape of the upper surface of the rib plate, and the second profiling groove is consistent with the convex shape of the bottom of the rib plate, so as to ensure that a complete support surface is formed before punching. In addition, the punching piece 40 and the clamping piece 641 clamp the rib plate synchronously up and down, so as to ensure that the area to be punched of the rib plate is in a stable state before and after punching, and to prevent the punching deviation or deformation caused by local freedom.

[0092] This embodiment achieves comprehensive support for the surface of the rib plate before punching by respectively providing contoured grooves on the punching piece 40 and the clamping piece 641 that are compatible with the raised structure of the area to be punched on the rib plate, thereby greatly improving the fit between the punching piece 40 and the rib plate, thereby effectively avoiding the problem of punching force offset caused by local protrusions on the surface of the rib plate, preventing punching tearing, shearing abnormalities or cutting burrs, further improving the force uniformity during the punching process, and significantly improving the flatness and dimensional accuracy of the punching cut. At the same time, the technical solution can adapt to the production needs of diverse and complex rib plate structures, enhance the flexible manufacturing capabilities of the mold and the overall yield of the energy absorption box 90, reduce the product scrap rate due to poor punching, and significantly improve the stability and economic benefits of the production line.

[0093] See also Figure 6 to Figure 7 In some embodiments, the abutting member 50 is provided with a first avoidance groove 634, and the first avoidance groove 634 is configured to allow the guide column 643 and the limit member 644 to pass through when the base 610 rotates relatively. The abutting member 50 is provided with a second avoidance groove 635, and the third inclined surface 632 is constructed on one side of the inner wall of the second avoidance groove 635. The second avoidance groove 635 is configured so that when the abutting member 50 moves toward the direction close to the fixed mold 10 along with the punching member 40, the fourth inclined surface 510 of the abutting member 50 can abut against the third inclined surface 632.

[0094] Specific: The first avoidance groove 634 is provided in the main body structure of the abutment 50, and the position of the first avoidance groove 634 corresponds to the guide post 643 and the stopper 644 of the clamping assembly 640. The first avoidance groove 634 runs through the thickness direction of the abutment 50, and its size matches the outer dimensions of the guide post 643 and the stopper 644, allowing the guide post 643 and the stopper 644 to pass smoothly during the rotation of the abutment 50 relative to the base 610 without interfering with the abutment 50. A third inclined surface 632 is provided on one side of the inner wall of the second avoidance groove 635, which is used to cooperate and contact with the third inclined surface 632 of the abutment 630. The second avoidance groove 635 is designed as an open groove to ensure that when the punching member 40 drives the supporting member 50 to move toward the fixed mold 10, the fourth inclined surface 510 on the supporting member 50 can smoothly contact the third inclined surface 632 of the abutting member 630 in the second avoidance groove 635 area and form a stable inclined surface linkage without affecting the continuity of the punching action due to structural interference.

[0095] The above overall design ensures the spatial compatibility and action continuity among the punching member 40 , the abutting member 50 , the abutting member 630 and the clamping assembly 640 during the working process.

[0096] During the punching process, the energy absorbing box 90 is first placed on the fixed mold 10 for positioning, and the movable mold 20 drives the punching piece 40 and the abutting piece 50 to move toward the fixed mold 10. The abutting piece 50 moves downward with the punching piece 40, and the fourth inclined surface 510 is inserted into the second avoidance groove 635 to gradually contact the third inclined surface 632 of the abutting piece 630. At the same time, the abutting piece 50 rotates slightly relative to the base 610, and because the first avoidance groove 634 is provided, the guide column 643 and the limiter 644 of the clamping assembly 640 can pass smoothly without interfering with the abutting piece 50, thereby ensuring the smooth clamping action.

[0097] The first avoidance groove 634 allows the guide column 643 and the limit member 644 to smoothly pass through the abutment 50 when the abutment 50 rotates relative to the base 610, avoiding interference or jamming of the mechanism, and ensuring reliable completion of the clamping action. The second avoidance groove 635 allows the fourth inclined surface 510 of the abutment 630 to accurately contact the third inclined surface 632 of the abutment 630 in the avoidance groove area when the abutment 50 moves with the punching member 40, forming a stable inclined surface linkage push, pushing the abutment 630 to move, thereby completing the reliable clamping and punching action of the rib plate. The third inclined surface 632 is arranged on the inner wall of the second avoidance groove 635, which helps to avoid collision or dislocation caused by the inclined surfaces when they are connected, and improves the consistency and smoothness of the mechanism linkage before punching.

[0098] In this embodiment, by setting a first avoidance groove 634 on the supporting member 50, the guide column 643 and the limit member 644 in the clamping assembly 640 can pass smoothly during the movement of the supporting member 50, thereby avoiding the problem of failure of the clamping action or abnormal punching due to structural interference; by setting a second avoidance groove 635, the supporting member 50 can smoothly cooperate with the supporting member 630 when moving toward the fixed mold 10 with the punching member 40, forming a stable pushing linkage, thereby ensuring that the rib plate obtains reliable clamping support before punching; this technical solution effectively improves the movement coordination of various components inside the mold under high-frequency operation, reduces the occurrence rate of jamming and failure, further improves the consistency and stability of the punching action, and significantly improves the overall quality and production efficiency of the energy absorption box 90 rib plate punching process, while enabling the stamping mold to adapt to the more complex and diversified energy absorption box 90 rib plate design, enhancing the flexible manufacturing capability and production adaptability of the mold system.

[0099] See also Figures 3 to 5 In order to prevent the abutting member 50 from separating from the base 610 when it moves toward or away from the first inclined surface 622, in some embodiments, the moving direction of the abutting member 630 is defined as a first direction, and the base 610 is provided with a limiting slide 613 along the first direction. A limiting slider 633 is provided on the side of the abutting member 630 facing the base 610, and the limiting slider 633 is slidably disposed in the limiting slide 613, and the limiting slider 633 is configured to be limited to move along the first direction in the limiting slide 613 when the abutting member 630 and the base 610 move relative to each other.

[0100] Specific: The base 610 is provided with a limited slide groove 613 along the moving direction (defined as the first direction) of the abutment 630. The limited slide groove 613 is a strip groove structure extending along the first direction, with a length greater than or equal to the moving stroke range of the abutment 630, and a width adapted to the size of the limited slider 633, to ensure free sliding and limit separation. A limited slider 633 is provided on the side of the abutment 630 facing the base 610, and the size and shape of the limited slider 633 match the limited slide groove 613 of the base 610. In a specific manner, the cross-sectional shape of the limited slider 633 is a "T"-shaped structure, and the shape of the limited slide groove 613 is also adapted thereto, so that the abutment 630 is constrained by the limited slide groove 613 in a direction perpendicular to the limited slide groove 613, preventing the abutment 630 from being offset, lifted or separated during the movement of the abutment 630 in the first direction. Through the above structural design, the abutment member 630 can move stably and controllably along the first direction during the punching action, and always maintain a connection with the base 610, preventing structural detachment or interference failure caused by inertia, elastic rebound or operational impact.

[0101] In the clamping and punching preparation stage, the movable mold 20 drives the punching member 40 and the abutting member 50 to move downward toward the fixed mold 10, and the abutting member 50 pushes the abutting member 630 to slide along the first direction through the fourth inclined surface 510. The limiting slider 633 slides in the limiting slide groove 613, thereby limiting the abutting member 630 to move only along the first direction without offset or separation. In the punching and clamping formation stage, the abutting member 630 slides to the specified position in the limiting slide groove 613, and pushes the abutting plate 620 to rotate through the second inclined surface 631, so that the abutting surface 621 and the bottom surface of the rib plate form a reliable abutment clamping. In the waste discharge stage, the movable mold 20 rises, and the abutting member 630 retreats under the action of the spring 660, and the limiting slider 633 continues to move in the limiting slide groove 613 to ensure that the abutting member 630 returns to the preset position smoothly, and at the same time, the abutting plate 620 rotates to form a waste sliding channel to complete the waste discharge. Finally, in the overall resetting stage, when the next punching cycle begins, the abutment member 630 and the limit slider 633 are already in the starting position, and the mechanism stably and reliably re-enters the clamping preparation state.

[0102] It should be noted that the limit slider 633 must slide precisely in the limit slot 613 to prevent the abutment 630 from being disengaged or deflected due to external force or vibration, so as to ensure the continuous stability of the punching and clamping action. In addition, the length of the limit slot 613 must be greater than the maximum movement stroke of the abutment 630, and the appropriate depth of the limit slot 613 (usually 1.2 to 1.5 times the height of the slider) should be selected according to the working conditions to ensure smooth sliding and reliable limiting. The limit slider 633 and the abutment 630 can be fixed by threaded connection or welding to ensure the firmness of the connection under high-frequency movement.

[0103] In this embodiment, by setting a matching structure of a limiting slider 633 and a limiting slide groove 613 between the abutment 630 and the base 610, the abutment 630 is effectively prevented from accidentally detaching due to inertia, impact or elastic reaction during movement, thereby improving the stability of the clamping and waste discharge actions, ensuring the posture consistency and controlled movement of each moving unit inside the mold, reducing the risk of jamming, dislocation or punching failure due to component separation, further improving the continuity and reliability of the punching action, and significantly improving the consistency of the rib plate punching quality. At the same time, the service life of the mold is extended, the maintenance frequency and operating costs are reduced, and the adaptability of the mold to high-frequency, long-term continuous operating environments is enhanced, thereby effectively improving the overall efficiency and operation stability of the production line.

[0104] See also Figure 6 to Figure 7In order to prevent the first inclined surface 622 of the abutment plate 620 from scratching the second inclined surface 631 of the abutment member 630 during the rotation process, in some embodiments, the first inclined surface 622 is located on the side of the abutment plate 620 facing the base 610, and the edge of the first inclined surface 622 close to the movable mold 20 and the connection between the side of the abutment plate 620 facing the base 610 are configured as arc chamfers 624.

[0105] Specific: At the edge of the abutment plate 620 facing the base 610 (i.e., the end close to the movable mold 20), the intersection of the first inclined surface 622 and the abutment plate 620 facing the base 610 is processed into an arc chamfer 624 structure. The arc chamfer 624 is in a smooth transition state, and the radius is optimized according to the relative rotation angle between the abutment member 630 and the abutment plate 620, the contact pressure of the inclined surface, and the desired contact area. In addition, by setting the arc chamfer 624 in the key contact area, the edge stress concentration between the two inclined surfaces can be effectively buffered during the rotation of the abutment plate 620, avoiding the occurrence of scratches and gnawing phenomena, and ensuring smooth and reliable operation of the mechanism.

[0106] In the initial state, the abutment plate 620 is in a free rotation preparation state, and the abutment surface 621 of the abutment plate 620 has not yet contacted the rib plate. In the clamping formation stage, the movable mold 20 drives the punching member 40 and the abutment member 50 to press down, and the fourth inclined surface 510 of the abutment member 50 pushes the third inclined surface 632 of the abutment member 630 to move, and the abutment member 630 pushes the first inclined surface 622 of the abutment plate 620 via the second inclined surface 631. As the abutment member 630 pushes, the abutment plate 620 rotates around the rotation axis, so that the abutment surface 621 gradually approaches and abuts against the bottom surface of the rib plate. When the abutment 630 pushes the abutment plate 620 to rotate, since an arc chamfer 624 is set on the side of the first inclined surface 622 close to the movable mold 20, the initial contact between the second inclined surface 631 of the abutment 630 and the first inclined surface 622 of the abutment plate 620 is transformed from point contact or line contact to arc surface transition contact, which reduces the local contact stress and effectively avoids the inclined surface from being scratched or worn. After the abutment is completed, the punching piece 40 is pressed in to complete the punching of the area to be punched on the rib plate. Then the movable mold 20 rises, the abutment 50 is out of contact with the abutment 630, the abutment plate 620 loses its thrust, rotates and guides the waste to slide down, and the action is continuous and smooth.

[0107] The arc chamfer 624 converts the sliding friction generated when the abutment plate 620 rotates from sharp contact to surface contact through a smooth transition curve, significantly reducing the wear rate and the risk of surface scratches. The chamfer radius needs to be optimized according to the moving speed, punching frequency and contact pressure of the abutment member 630 to take into account both structural strength and buffering performance. The arc chamfer 624 is usually processed by precision milling or grinding to ensure the continuity of the curved surface and low surface roughness to reduce the friction coefficient.

[0108] In this embodiment, an arc chamfer 624 is provided on the edge of the first inclined surface 622 of the abutment plate 620, so that the local contact stress generated when the abutment member 630 pushes the abutment plate 620 to rotate is effectively reduced, scratches and wear on the inclined surface are prevented, the smoothness and consistency of the rotation of the abutment plate 620 are ensured, the stability and reliability of the clamping action are improved, the service life of the abutment plate 620 and the abutment member 630 is extended, the frequency of mold maintenance due to wear and failure is reduced, the overall working efficiency and service life of the stamping mold are further improved, and the requirements of high-frequency and high-load continuous production are adapted. At the same time, the reliability and flexibility of the mold under complex working conditions are enhanced, and the equipment failure rate and overall operating costs are reduced.

[0109] The above contents described in this specification are merely examples of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, as long as they do not deviate from the contents of the present specification or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A stamping die for processing an energy absorption box, the energy absorption box comprising an internal cavity, a rib plate is arranged in the internal cavity, the rib plate comprises a to-be-punched area, and the to-be-punched area has a convex structure, characterized in that: include: A fixed mold including a second mounting plane; A positioning mechanism is arranged at the second mounting plane to limit the energy absorbing box on the second mounting plane when punching the rib plate; A movable mold is controlled to move toward or away from the fixed mold, wherein the movable mold includes a first mounting plane, the first mounting plane faces the second mounting plane, and the two are arranged in parallel; A punching piece, arranged on the first mounting plane; A supporting member, arranged on the side of the punching member facing the second mounting plane, and having a fourth inclined surface; A clamping mechanism, the clamping mechanism comprising: A base, fixedly connected to the second mounting plane, the base comprising a plug end, the plug end being inserted into the inner cavity of the energy absorption box and being located between the rib plate and the second mounting plane; an abutment plate, rotatably arranged on a side of the base away from the second mounting plane, the abutment plate comprising an abutment surface and a first inclined surface, the abutment surface being configured to abut against the side of the rib plate facing the second mounting plane when the stamping die is in a processing state; an embedding groove is provided on the abutment plate, and the shape and size of the embedding groove are the same as the shape and size of the area to be punched on the rib plate; an abutment member, slidably disposed between the abutment plate and the base, the abutment member comprising a second inclined surface and a third inclined surface, the second inclined surface being configured to apply a thrust directed toward the rib plate of the energy absorption box to the abutment plate when in contact with the first inclined surface, so that the abutment surface and the rib plate abut against the second mounting plane side; the third inclined surface being configured to move the abutment member toward the first inclined surface when in contact with the fourth inclined surface and relative movement occurs therebetween; Clamping assembly, comprising: A clamping member is arranged at the embedding groove in a manner parallel to the abutment surface and is restricted to move in a direction perpendicular to the abutment surface, and the shape and size of the clamping member are the same as the shape and size of the area to be punched of the rib plate; An elastic member, disposed between the clamping member and the embedding groove, to apply an elastic force to the clamping member in a direction away from the second mounting plane; The embedding groove is configured such that after the punching piece punches the area to be punched of the rib plate, the punched rib plate is located at the clamping piece and is pressed into the embedding groove by the punching piece.

2. The stamping die according to claim 1, characterized in that: The punching piece is provided with a first contoured groove on one side facing the second mounting plane, which is matched with the protruding structure on the to-be-punched area of ​​the rib plate; A second contoured groove matching the protruding structure on the area to be punched of the rib plate is formed on one side of the clamping member facing the first mounting plane.

3. The stamping die according to claim 1, characterized in that: A guide hole is provided on the base, and an extending direction of the guide hole is parallel to a sliding direction of the abutment member; The clamping mechanism also includes: A guide shaft, one end of which is connected to the abutment member, and the other end of which is movably inserted into the guide hole to limit the movement of the abutment member along the extension direction of the guide hole; A spring, which is sleeved on the outside of the guide shaft, and two ends of the spring are respectively in contact with the abutment member and the base; In which, the stamping die includes a waste discharge state. When the stamping die is in the waste discharge state, the punching part moves with the movable die in a direction away from the fixed die, and the third inclined surface is separated from the fourth inclined surface, so that the abutment part moves a preset distance in a direction away from the first inclined surface under the elastic force of the spring, so that the third inclined surface is directed toward the upper edge of the movable die and the abutment plate that rotates relative to the base is connected to the lower edge of the abutment part side, so that the rib plate that has completed punching and is located on the clamping part slides down along the third inclined surface.

4. The stamping die according to claim 3, characterized in that: A guide hole is provided at the embedding groove of the abutting plate; The clamping assembly also includes: A guide post, one end of which is connected to the clamping member, and the other end of which passes through the guide hole; A limiting member is fixedly connected to one end of the guide column passing through the guide hole.

5. The stamping die according to claim 4, characterized in that: The supporting member is provided with a first avoidance groove, and the first avoidance groove is configured to allow the guide column and the limiting member to pass through when the supporting member rotates relative to the base.

6. The stamping die according to claim 4 or 5, characterized in that: The supporting member is provided with a second avoidance groove, and the third inclined surface is constructed on one side of the inner wall of the second avoidance groove. The second avoidance groove is configured so that when the supporting member moves toward the fixed mold along with the punching member, the fourth inclined surface of the supporting member can abut against the third inclined surface.

7. The stamping die according to claim 1, characterized in that: The moving direction of the abutment member is defined as a first direction, and the base is provided with a limited sliding groove along the first direction; The abutment member is provided with a limiting slider, and the limiting slider is slidably disposed in the limiting slide groove. The limiting slider is configured to be restricted from moving along the first direction in the limiting slide groove when the abutment member and the base move relative to each other.

8. The stamping die according to claim 1, characterized in that: The elastic member is configured to apply an initial reaction force to the clamping member before the punching member contacts the to-be-punched area of ​​the rib plate; The elastic member is configured to shrink synchronously with the movement of the clamping member toward the second mounting plane as the punching member continues to move toward the second mounting plane and presses the punched rib into the embedding groove, so that the punched rib enters the embedding groove.

9. The stamping die according to claim 3, characterized in that: The preset distance is obtained by the following formula: The preset distance is defined as , satisfy: ； in, is the distance from the rotation axis of the abutment plate to the far end of the abutment surface, is the rotation angle of the abutment plate after the third inclined surface is completely separated from the fourth inclined surface.

10. The stamping die according to claim 1, characterized in that: The first inclined surface is located on a side of the abutting plate facing the base, and a connection between an edge of the first inclined surface close to the movable mold side and a side of the abutting plate facing the base is configured as an arc chamfer.

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