A stamping die for the processing of energy-absorbing boxes

Abstract

The present application relates to a stamping die for processing an energy absorption box, comprising a fixed die provided with a second mounting plane, a positioning mechanism for positioning the energy absorption box, a movable die that can move in a direction close to or away from the fixed die, and a punching piece arranged on the first mounting plane, a holding piece with a fourth inclined surface is arranged below the punching piece, a clamping mechanism is arranged on the second mounting plane, and the clamping mechanism comprises a base fixed to the second mounting plane, an abutment plate rotatably connected to the base, an abutment member slidably connected to the base, and a clamping assembly arranged at the groove of the abutment plate. The stamping die enables the punching area of the rib plate to obtain reliable support before punching through the cooperation of the holding piece, the abutment member and the abutment plate, and the clamping piece applies an elastic force away from the second mounting plane through the elastic piece to enhance the clamping stability, thereby effectively solving the problems of insufficient support of the punching area of the rib plate, offset of the punching force direction, discontinuous transmission of the punching stress, and decreased punching accuracy that lead to easy damage of the punching head in the prior art.

Description

Technical Field

[0001] The present invention relates to a stamping die, and particularly to a stamping die for processing an energy absorption box. Background Art

[0002] With the continuous improvement of the passive safety performance of automobiles, the energy absorption box, as a key energy absorption component, is widely used in various vehicles. The energy absorption box is usually made of a lightweight and high-strength metal material, and is internally provided with multiple rib plate structures for guiding the controlled deformation of the energy absorption box during a collision, so as to achieve the purpose of dispersing energy and protecting the occupants. In the production and manufacturing process of the energy absorption box, it is necessary to perform punching and cutting on specific areas of the rib plates and the box body structure through a stamping die to form a preset induced deformation area, so as to ensure that the energy absorption box can effectively absorb energy according to the designed folding mode during a collision. Therefore, the efficient and precise punching of the internal rib plates of the energy absorption box has become an important technical link in the manufacturing process of the energy absorption box.

[0003] In the existing punching and cutting process of the energy absorption box, the processing of the internal structure is usually completed by a multi-step punching and cutting method. Specifically, first, the lower side plate and the upper side plate of the energy absorption box are punched and cut through a punching die to form a basic external opening; subsequently, in the internal cavity of the energy absorption box, the longitudinally arranged rib plates (longitudinal ribs) are punched and cut; finally, after the punching and cutting of the longitudinal ribs are completed, the transversely arranged rib plates (transverse ribs) inside are punched and cut. In the existing punching die structure, simple fixed support blocks are usually arranged on the base of the energy absorption box to provide a certain supporting force for the rib plates, or the reaction force of the energy absorption box body is directly used for support. The punching part presses against the rib plates in the vertical direction to complete the punching action. Overall, the existing support structure mainly relies on the natural contact between the rib plates and the energy absorption box body or the base, and the support method is relatively simple.

[0004] However, there are various problems with the existing punching die and process. First, due to insufficient support in the punching area of the rib plates, especially in the edge area, local suspension is likely to occur during punching, resulting in local yield or collapse of the rib plates when stressed; second, since the rib plates and the base mainly rely on natural contact for support, the overall clamping effect is not good, and it is difficult to achieve reliable positioning and fixing of the rib plates before punching, resulting in the punching force direction being prone to deviation, generating skew shear or even tearing; third, the stress transmission path between the rib plates and the die is discontinuous, and the punching load cannot be effectively transmitted back to the die base, further exacerbating the problems of punching accuracy decline and punching head loss. Therefore, there is an urgent need to propose a new stamping die structure that can achieve stable clamping of the rib plates before punching and maintain a stable punching force direction during punching. Summary of the Invention

[0005] The purpose of the present invention is to provide a stamping die that can achieve stable clamping of rib plates before punching and maintain uniform stress 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:

[0007] A fixed mold including a second mounting plane;

[0008] 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;

[0009] 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;

[0010] A punching piece, arranged on the first mounting plane;

[0011] A supporting member, arranged on the side of the punching member facing the second mounting plane, and having a fourth inclined surface;

[0012] A clamping mechanism, the clamping mechanism comprising:

[0013] 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;

[0014] 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;

[0015] 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;

[0016] Clamping assembly, comprising:

[0017] 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;

[0018] An elastic member is 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;

[0019] Wherein, the embedding groove is configured such that after the punching member punches the area to be punched of the rib plate, the rib plate cut off is located at the clamping member and is pressed into the embedding groove by the punching member.

[0020] Preferably, a first profiling groove adapted to the convex structure on the area to be punched of the rib plate is formed on one side of the punching member facing the second mounting plane.

[0021] A second profiling groove adapted to the convex 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.

[0022] Preferably, a guiding hole is formed on the base, and the extending direction of the guiding hole is parallel to the sliding direction of the abutting member.

[0023] The clamping mechanism further includes:

[0024] A guide shaft, one end of the guide shaft is connected to the abutting member, and the other end of the guide shaft is movably inserted into the guiding hole to limit the movement of the abutting member along the extending direction of the guiding hole;

[0025] A spring is sleeved outside the guide shaft, and two ends of the spring are respectively abutted against the abutting member and the base.

[0026] Wherein, the stamping die includes a waste discharging state. When the stamping die is in the waste discharging state, the punching member moves away from the fixed die along with the moving die, the third inclined surface is separated from the fourth inclined surface, so that the abutting member moves a preset distance in a direction away from the first inclined surface under the elastic force of the spring, and the upper edge of the third inclined surface facing the moving die and the lower edge of the abutting plate relatively rotating with the base and facing the side of the abutting member are butted, so that the rib plate completed punching on the clamping member slides down along the third inclined surface.

[0027] Preferably, a guiding hole is formed at the embedding groove of the abutting plate.

[0028] The clamping assembly further includes:

[0029] A guide post, one end of the guide post is connected to the clamping member, and the other end of the guide post passes through the guiding hole;

[0030] A limiting member is fixedly connected to one end of the guide post passing through the guiding hole.

[0031] Preferably, the abutting member is provided with a first avoidance groove configured to allow the guide post and the limiting member to pass through when relatively rotating with the base.

[0032] Preferably, the abutting member is provided with a second avoidance groove, and a third inclined surface is formed on one side of the inner wall of the second avoidance groove. The second avoidance groove is configured such that when the abutting member moves in the direction close to the fixed mold along with the punching member, the fourth inclined surface of the abutting member can abut against the third inclined surface.

[0033] Preferably, the moving direction of the abutting member is defined as a first direction, and the base is provided with a limiting sliding groove along the first direction.

[0034] The abutting member is provided with a limiting sliding block which is slidably arranged in the limiting sliding groove. The limiting sliding block is configured to be restricted to move along the first direction in the limiting sliding groove when the abutting member and the base move relatively.

[0035] 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.

[0036] The elastic member is configured to synchronously contract as the clamping member moves in the direction close to the second installation plane during the process that the punching member continuously moves in the direction close to the second installation plane and presses the rib plate after punching into the embedding groove, so that the rib plate after punching enters the embedding groove.

[0037] Preferably, the preset distance is obtained by the following formula:

[0038] The preset distance is defined as , and should satisfy the following formula:

[0039]

[0040] wherein, is the distance from the rotation axis of the abutting plate to the distal end of the abutting surface, is the rotation angle of the abutting plate after the third inclined surface and the fourth inclined surface are completely separated.

[0041] Preferably, the first inclined surface is located on the side of the abutting plate facing the base, and the connection between the edge of the first inclined surface close to the moving mold side and the side of the abutting plate facing the base is configured as an arc chamfer.

[0042] Advantages of the embodiments in the present invention:

[0043] 1. In this stamping die, a clamping mechanism is provided at the second installation plane of the fixed die. The clamping mechanism includes a contact plate rotatably connected to the base, a contact member slidably connected to the base, and a clamping assembly disposed at the groove. By means of the inclined surface cooperation of the holding member, the contact member, and the contact plate, pre-clamping support for the area to be punched of the rib plate is achieved. Therefore, it effectively solves the problems in the prior art, such as insufficient support for the punching area of the rib plate, deviation of the punching force direction during the punching process, discontinuous punching stress transmission path, and decreased punching accuracy resulting in easy damage of the punching head. Furthermore, it realizes the technical effects of forming a stable and reliable clamping for the area to be punched of the rib plate before punching, maintaining a stable punching force direction during the punching process, uniform transmission of the punching load, and excellent punching quality.

[0044] 2. On the technical basis that this stamping die realizes stable clamping of the area to be punched of the rib plate by the clamping mechanism before punching and ensures a stable punching force direction and forms a continuous force path during the punching process, it further adopts the technical means of opening a guiding hole on the base, setting a guide shaft between the contact member and the base, and sleeving a spring outside the guide shaft. When the stamping die is in the state of discharging waste, the contact member moves a preset distance along the first direction under the action of the spring force, so as to promote the separation of the third inclined surface and the fourth inclined surface, and the contact plate automatically rotates due to the loss of support, forming a continuous sliding surface with the edge of the contact member facing the moving die side to guide the discharged waste. Therefore, on the basis of the technical effects of reliable clamping of the rib plate and guaranteeing punching accuracy, it effectively further solves the problems in the prior art, such as waste retention, unsmooth waste discharge, and die jamming after the rib plate punching is completed. Furthermore, it synergistically realizes the comprehensive technical effects of ensuring the punching quality of the rib plate, being able to smoothly guide the waste to slide and discharge after punching, improving the continuous operation efficiency of the die, and reducing the failure rate and maintenance cost. Description of the Drawings

[0045] Figure 1 Shows a schematic exploded view of the stamping die proposed in an embodiment of the present invention.

[0046] Figure 2 Shows a schematic cross-sectional view of the stamping die proposed in an embodiment of the present invention.

[0047] Figure 3 Shows a schematic structural view of the punching part in the punching state proposed in an embodiment of the present invention.

[0048] Figure 4 Shows a schematic cross-sectional view of the punching part in the punching state proposed in an embodiment of the present invention.

[0049] Figure 5 Shows a schematic side view of the punching part in the punching state proposed in an embodiment of the present invention.

[0050] Figure 6 Shows a schematic exploded view of the clamping mechanism proposed in an embodiment of the present invention Figure One .

[0051] Figure 7 Shows a schematic exploded view of the clamping mechanism proposed in an embodiment of the present invention Figure Two .

[0052] Figure 8 Shows a schematic structural diagram of the energy absorption box mentioned in the present invention.

[0053] Figure 9 Shows a schematic cross-sectional view of the energy absorption box mentioned in the present invention.

[0054] Figure 10 Shows a schematic structural diagram of the transverse rib plate mentioned in the present invention.

[0055] Wherein: 10, fixed mold; 110, second installation plane; 20, moving mold; 210, first installation plane; 30, positioning mechanism; 40, punching part; 410, first profiling groove; 420, insertion hole; 50, abutting part; 510, fourth inclined surface; 60, clamping mechanism; 610, base; 611, insertion end; 612, guiding hole; 613, limiting sliding groove; 620, abutting plate; 621, abutting surface; 622, first inclined surface; 623, embedding groove; 6231, guiding hole; 624, arc chamfer; 630, abutting part; 631, second inclined surface; 632, third inclined surface; 633, limiting slider; 634, first avoidance groove; 635, second avoidance groove; 640, clamping assembly; 641, clamping part; 642, elastic part; 643, guide post; 644, limiting part; 650, guide shaft; 660, spring; 70, rod; 710, diameter-expanded structure; 80, elastic part; 90, energy absorption box; 910, transverse rib plate. Detailed implementation manners

[0056] The following combines the drawings and embodiments to further describe in detail the specific implementation manners of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0057] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is 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. Therefore, it should not be construed as a limitation on the protection scope 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 specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more than two.

[0058] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0059] Figure 8 A schematic structural diagram of an energy absorption box mentioned in the present invention is shown. Figure 9 A schematic cross-sectional view of an energy absorption box mentioned in the present invention is shown. Figure 10 A schematic structural diagram of a transverse rib plate mentioned in the present invention is shown.

[0060] In a preferred embodiment of the present application, a stamping die is proposed. The object of the stamping die is a shell structure having an internal cavity and a rib plate provided in the internal cavity. Please refer to Figures 8 to 10, taking the energy absorption box 90 as an example, stiffeners are usually arranged inside the energy absorption box 90. During the production and manufacturing process of the energy absorption box 90, it is necessary to use a stamping die to punch and cut specific areas of the stiffeners and the box body structure 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, and is used to guide the controlled deformation of the energy absorption box 90 during the collision process, so as to achieve the purpose of dispersing energy and protecting the occupants. The internal stiffeners of the energy absorption box 90 applicable to the present application include two types: vertical stiffeners and horizontal stiffeners 910. In order to remove the local stiffeners in specific areas, it is necessary to follow a specific punching and cutting sequence to realize the processing of the energy absorption box 90. For example, the stamping die in the present application is mainly used to punch and cut the energy absorption box 90 with the upper and lower sides and the vertical stiffeners cut, because the original upper and lower sides and the vertical stiffeners of the energy absorption box 90 will hinder the punching and cutting of the area to be punched and cut of the horizontal stiffeners 910. And because the existing punching heads are difficult to punch and cut the connecting part between the vertical stiffeners and the horizontal stiffeners 910 cleanly, after the punching and cutting of the vertical stiffeners is completed, part of the side of the horizontal stiffeners 910 of the energy absorption box 90 will remain in the area connected to the horizontal stiffeners, that is, the protruding structure described later. And the stamping die proposed in the present application is designed for processing the energy absorption box with vertical stiffeners (protruding structures) remaining at the connection with the horizontal plate stiffeners.

[0061] It should be noted that for the existing die used to punch and cut the internal stiffeners of the energy absorption box 90, a support member that abuts against the stiffeners is usually arranged in the punching and cutting direction to provide reverse support for the stiffeners during the punching and cutting process. For example, if the punching and cutting direction is the negative Z-axis direction, the support member will provide a supporting force along the positive Z-axis direction for the stiffeners. However, in order to cut off the stiffeners in the area to be punched and cut, therefore, an avoidance groove is often opened at the position of the support member corresponding to the area to be punched and cut of the stiffeners, so that the punching head can cut off the area to be punched and cut of the stiffeners. Taking the punching and cutting direction towards the negative Z-axis direction as an example, the support member is below the stiffeners, and an avoidance groove is opened at the top of the support member located below the stiffeners to leave a punching and cutting stroke for the punching head, so that the stiffeners in the area to be punched and cut can be cut off smoothly. During this process, the area to be punched and cut of the stiffeners will be in a relatively suspended state, which can be referred to Figure 2 and Figure 9 .

[0062] Figure 1 shows a schematic exploded view of the stamping die proposed in an embodiment of the present invention. Figure 2 shows a schematic cross-sectional view of the stamping die proposed in an embodiment of the present invention. Figure 3 shows a schematic structural view of the punching member in the punching state proposed in an embodiment of the present invention. Figure 4 shows a schematic cross-sectional view of the punching member in the punching state proposed in an embodiment of the present invention. Figure 5A schematic side view of a punching part in a punching state proposed in an embodiment of the present invention is shown. Figure 6 A schematic exploded view of a clamping mechanism proposed in an embodiment of the present invention is shown Figure One . Figure 7 A schematic exploded view of a clamping mechanism proposed in an embodiment of the present invention is shown Figure Two .

[0063] Please refer to 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 110, and the second mounting plane 110 includes a preset area for placing an energy absorption box 90. The positioning mechanism 30 is arranged at the second mounting plane 110 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 210, the first mounting plane 210 is parallel to the second mounting plane 110, and the first mounting plane 210 is arranged toward the second mounting plane 110. The punching piece 40 is arranged on the first mounting plane 210. The supporting piece 50 is arranged on the side of the punching piece 40 facing the second mounting plane 110, and a fourth inclined surface 510 is constructed on the supporting piece 50. The clamping mechanism 60 is arranged at the second mounting plane 110, 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 110, 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 110; 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 110 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 110 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 110 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 110.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 .

[0064] Specific:

[0065] A preset area for placing the energy absorbing box 90 is provided on the second installation plane 110 on the fixed mold 10 to support the main body of the energy absorbing box 90 .

[0066] The positioning mechanism 30 is disposed at the second mounting plane 110 to limit the position deviation of the energy absorbing box 90 during the punching process and ensure the punching accuracy.

[0067] 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 210 is provided on the movable mold 20 , which is parallel to and opposite to the second mounting plane 110 .

[0068] The punching member 40 is installed on the first installation plane 210 and is used to apply a punching force to a specific area of the rib plate along a vertical direction.

[0069] The abutment member 50 is disposed below the punching member 40 and faces the second mounting plane 110. The abutment member 50 is provided with a fourth inclined surface 510 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.

[0070] The clamping mechanism 60 is arranged at the second mounting plane 110 of the fixed mold 10, wherein the base 610 is fixedly connected to the second mounting plane 110, 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 110, and the side of the plug-in end 611 facing away from the second mounting plane 110 should be in contact with the side of the transverse rib plate 910 facing the second mounting plane 110, 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 110, 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 110) 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 installation plane 110, 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 embedded groove 623 on the abutment plate 620, arranged parallel to the abutment surface 621, and 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 embedded groove 623 to apply an upward elastic force to the clamping member 641 to provide stable pre-compression support.Moreover, the depth of the slot 623 is configured such that when the punching head moves towards the fixed mold 10, and punches the area to be punched of the rib plate, the rib plate cut off is placed on the clamping member 641, and is pressed into the slot 623 by the punching member 40. At this time, the minimum distance from the rib plate located in the slot 623 to the abutting surface 621 is a positive number, that is, there is a gap between the top surface of the rib plate in the slot 623 and the abutting surface 621 of the abutting plate 620.

[0071] It should be noted that when the abutting member 50 moves towards the transverse rib plate 910 of the energy absorption box 90 along with the punching member 40, and the fourth inclined surface 510 contacts and fits with the third inclined surface 632 to push the abutting member 630 to move towards the first inclined surface 622, causing the abutting plate 620 to rotate, and the abutting surface 621 abuts against the bottom surface of the transverse rib plate 910. Due to the arrangement of the elastic member 80 between the abutting member 50 and the punching member 40, the punching member 40 can continue to move downward, thereby completing the local punching work on the transverse rib plate 910. It can be understood that the elastic modulus of the elastic member 80 needs to be configured such that when the abutting surface 621 of the abutting plate 620 abuts against the bottom surface of the transverse rib plate 910, the elastic member 80 can only be slightly compressed. Moreover, only when the abutting surface 621 completely abuts against the bottom surface of the transverse rib plate 910, the elastic member 80 will continuously contract under the downward pressure of the punching member 40. That is, during the process of the fourth inclined surface 510 and the third inclined surface 632 cooperating to push the abutting member 630 to move towards the first inclined surface 622, and the abutting plate 620 rotates through the cooperation of the first inclined surface 622 and the second inclined surface 631, the reaction force exerted on the abutting member 50 cannot cause the elastic member 80 to be significantly compressed.

[0072] During the actual working process of the stamping die, the overall operation process is as follows:

[0073] Place the energy absorption box 90 product to be processed on the preset area on the second installation plane 110 of the fixed mold 10, and limit and fix it through the positioning mechanism 30;

[0074] The moving mold 20 and the punching member 40 move towards the fixed mold 10 in the vertical direction. When punching the area to be punched 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, causing the abutting member 630 to move towards the first inclined surface 622 under the pushing action. At the same time, the second inclined surface 631 pushes the first inclined surface 622 of the abutting plate 620, causing the abutting plate 620 to rotate and its abutting surface 621 to tightly abut against the bottom surface of the rib plate;

[0075] 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 a pre-pressure towards the transverse rib plate 910 under the action of the elastic member 642, forming an abutting support for the area to be punched of the transverse rib plate 910.

[0076] The moving die 20 continues to move downward. The punching part 40 contacts the upper surface of the rib plate and applies a punching force. The area to be punched on the rib plate is cut off by the punching part 40, and the cut-off area slides into the embedding groove 623 for collection.

[0077] After punching is completed, the moving die 20 rises with the punching part 40. The abutting part 50 disengages from the inclined surface contact with the abutting member 630, and the abutting state is released. The remaining part of the transverse rib plate 910 remains intact.

[0078] In this embodiment, the clamping mechanism 60 acts cooperatively. Through the linkage of the abutting part 50, the abutting member 630, the abutting plate 620 and the clamping assembly 640, reliable clamping of the bottom surface and the top surface of the rib plate is completed before punching, effectively avoiding the rib plate from being suspended under force. Moreover, the elastic member 642 provides flexible support. The elastic member 642 in the clamping assembly 640 can pre-apply a stable elastic force before punching to ensure 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 design of the depth of the embedding groove 623 not only ensures the effective accommodation of the rib plate waste, but also avoids the rib plate waste from being suspended or unstably clamped during the punching process.

[0079] In this embodiment, since the clamping mechanism 60 is provided at the second installation plane 110 of the fixed die 10, and the clamping mechanism 60 includes an abutting plate 620 rotatably connected to the base 610, an abutting member 630 slidably connected to the base 610, and a clamping member 641 provided at the embedding groove 623, and through the inclined surface cooperation of the abutting part 50, the abutting member 630 and the abutting plate 620, the clamping and supporting of the rib plate are realized in advance before the punching part 40 contacts the area to be punched on the rib plate. Therefore, the following technical effects can be effectively achieved:

[0080] Prevent local yielding and collapse of the rib plate: Since the area to be punched on the rib plate is clamped by the clamping mechanism 60 before punching, it can effectively prevent the rib plate from locally yielding, bending or collapsing due to suspension or insufficient support during punching, thereby improving the overall stability of the rib plate forming.

[0081] Prevent skew shearing caused by the deviation of the punching force direction: By making the clamping member 641 fully fit with the bottom surface of the rib plate, the rib plate is uniformly stressed during punching, which can avoid the deviation of the punching force direction and effectively prevent problems such as skew shearing, tearing or burrs on the punching edge caused by the change of the punching angle, and improve the punching quality.

[0082] Realize the continuous back transmission of the punching load: Since the abutting plate 620 is rigidly connected to the second installation plane 110 through the base 610, the punching load generated by the rib plate during punching can form a complete and continuous force transmission path through the clamping mechanism 60 and be effectively back transmitted to the die base, avoiding stress concentration and reducing the risk of fatigue damage to the die structure.

[0083] 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.

[0084] 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.

[0085] 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. Furthermore, the elastic member 642 is also configured to shrink synchronously with the movement of the clamping member 641 toward the second mounting plane 110 during the process in which the punching member 40 continues to move toward the second mounting plane 110 and presses the punched rib plate into the embedding groove 623, so that the punched rib plate enters the embedding groove 623.

[0086] 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:

[0087] 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.

[0088] 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.

[0089] The third stage: the punching continues to press down, the "yielding and releasing" stage of the clamping member 641. 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. Its purpose is to press the separated rib plate waste into the embedding groove 623 while maintaining the stability of the sliding path. Moreover, during the downward movement of the clamping member 641, it needs to be smooth, without jitter or jamming, and maintain the guiding function.

[0090] Among them, the determining factor for whether the clamping member 641 "remains stationary" is the initial resistance force F of the elastic member 642 弹 (initial reaction force) is greater than the disturbing force F before punching contact 扰 . F 扰 mainly includes the self-gravity of the rib plate (negligible), the impact vibration force during die closing, and the early non-contact disturbance. According to experience (see Table 1 below for details), F 扰 is about between 10N and 20N. Therefore, as long as the initial set elasticity of the elastic member 642 is greater than 20N, the requirement that "the clamping member 641 does not move downward before punching contact" can be met.

[0091]

[0092] The initial resistance force F of the elastic member 642 弹 (initial reaction force) calculation formula is as follows:

[0093] Theoretical formula expression: .

[0094] Among them, F 扰 is the disturbing force (the aforementioned estimated value is 20N), is the safety factor (it is recommended to take a value between 1.5 and 2), F 弹初 is the initial resistance force of the elastic member.

[0095] Therefore, .

[0096] Assuming that a compression spring or a rubber elastic block is used, the parameters of the elastic member 642 can be further designed: the selected compression amount δ0 (initial compression). Generally, 3mm to 5mm is set as the preloading compression stroke.

[0097] Calculate the required stiffness k:

[0098]

[0099] Assuming that a pair of compression springs are used to support the clamping member 641: F 扰 is 20N, is 1.75, F 弹初 is 35N, δ0 is 5mm, The (stiffness) is 35 / 5 = 7 N / mm. Therefore, a compression spring with a preload of 5 mm providing a reaction force of 35 N and a stiffness of 7 N / mm can be selected.

[0100] Please refer to Figure 2 and Figure 4 . To ensure the continuity of stamping die cutting, the rib plate waste to be cut needs to be quickly discharged from the cutting die. Therefore, in some embodiments, a guiding hole 612 is formed in the base 610, and the extending direction of the guiding hole 612 is parallel to the sliding direction of the abutting member 630; the clamping mechanism 60 further includes a guiding shaft 650 and a spring 660. One end of the guiding shaft 650 is connected to the abutting member 630, and the other end of the guiding shaft 650 is movably inserted into the guiding hole 612 to limit the movement of the abutting member 630 along the extending direction of the guiding hole 612. The spring 660 is sleeved outside the guiding shaft 650, and both ends of the spring 660 are respectively abutted against the abutting member 630 and the base 610. Among them, the stamping die includes a waste discharging state. When the stamping die is in the waste discharging state, the punched part 40 moves away from the fixed die 10 along with the moving die 20, the third inclined surface 632 is separated from the fourth inclined surface 510, so that the abutting member 630 moves a preset distance in the direction away from the first inclined surface 622 under the elastic force of the spring 660, making the third inclined surface 632 face the upper edge of the moving die 20 and the lower edge of the abutting plate 620 that rotates relative to the base 610 and faces the side of the abutting member 630 butt-joint, so that the rib plate waste that has been cut on the clamping member 641 slides down along the third inclined surface 632.

[0101] Moreover, to clearly illustrate the operating state of the clamping assembly 640, please refer to Figure 7 . A guiding hole 6231 is formed at the slot 623 of the abutting plate 620; the clamping assembly 640 further includes a guiding post 643 and a limiting member 644. One end of the guiding post 643 is connected to the clamping member 641, and the other end of the guiding post 643 passes through the guiding hole 6231, and the limiting member 644 is fixedly connected to the end of the guiding post 643 passing through the guiding hole 6231.

[0102] Specifically:

[0103] A guiding hole 612 is formed in the base 610, and the guiding hole 612 extends along the sliding direction of the abutting member 630, mainly used to define the moving track of the abutting member 630 and guide the abutting member 630 to move stably along the specified direction.

[0104] One end of the guide shaft 650 is connected to the abutting member 630, and the other end is movably inserted into the guide hole 612 formed in the base 610. The guide shaft 650 is used to connect the abutting member 630 and the base 610, and limit the abutting member 630 to move only along the extending direction of the guide hole 612, preventing the abutting member 630 from shifting or having an abnormal attitude.

[0105] The spring 660 is sleeved outside the guide shaft 650, and both ends of the spring 660 are respectively abutted against the abutting member 630 and the base 610. When the spring 660 is in a controlled compression state, it stores elastic potential energy and is used to push the abutting member 630 to move a preset distance along a direction parallel to the first direction (i.e., the direction away from the first inclined surface 622) during the waste discharging stage.

[0106] The abutting plate 620 is provided with an embedding groove 623 and a guide hole 6231 is formed on the side close to the abutting member 630. The clamping assembly 640 includes a clamping member 641, an elastic member 642, a guide post 643 and a limiting member 644. The clamping member 641 is arranged at the embedding groove 623 of the abutting plate 620, and its shape and size are consistent with the area of the rib plate to be punched. It is used to form a stable fit with the bottom surface of the rib plate before punching. One end of the guide post 6231 is connected to the clamping member 641, and the other end passes through the guide hole 645 provided on the abutting plate 620. The limiting member 644 is fixed at one end of the guide post 643 passing through the guide hole 6231 to prevent the clamping member 641 from detaching from the abutting plate 620 during the elastic compression or release process, ensuring the reliable guiding and limiting of the clamping assembly 640. The elastic member 642 is arranged between the clamping member 641 and the abutting member 630. While providing elastic support for the clamping member 641, through the cooperation of the above structures, the clamping assembly 640 can not only realize the reliable clamping of the rib plate, but also cooperate with the waste discharging mechanism to realize the rapid and smooth discharge of the waste after punching.

[0107] During the clamping preparation stage, the energy-absorbing box 90 is placed in the preset area of the fixed mold 10 and is limited and fixed by the positioning mechanism 30. The moving mold 20 drives the punching part 40 and the abutting part 50 to move downward towards the fixed mold 10. The fourth inclined surface 510 of the abutting part 50 first contacts the third inclined surface 632 of the abutting member 630 and pushes the abutting member 630 to move along the direction of the guiding hole 612. The abutting member 630 presses the abutting plate 620 via the second inclined surface 631, causing the abutting plate 620 to rotate, and further making the abutting surface 621 contact the bottom surface of the rib plate. The clamping member 641 is flexibly attached to the bottom surface of the rib plate under the action of the spring 660, realizing the clamping and fixing of the area to be punched of the rib plate. During the punching stage, the moving mold 20 further moves downward, the punching part 40 contacts the upper surface of the rib plate and performs punching. The area to be punched of the rib plate is cut off, and part of the cut waste falls into the groove 623 of the abutting plate 620. During the waste discharging preparation stage, after punching is completed, the moving mold 20 rises in the direction away from the fixed mold 10 together with the punching part 40, and the fourth inclined surface 510 of the abutting part 50 gradually separates from the third inclined surface 632 of the abutting member 630. After the abutting member 630 loses the downward thrust from above, under the elastic force stored in the spring 660, it automatically moves along the direction of the guiding hole 612 in the direction away from the first inclined surface 622. During the waste discharging stage, as the abutting member 630 moves, the abutting plate 620 loses support and rotates freely. The edge of the abutting surface 621 of the abutting plate 620 is butted against the edge of the abutting member 630 on the side facing the moving mold 20, forming a continuous sliding surface. The waste of the rib plate smoothly slides down under the action of gravity and the guiding of the sliding surface, completing the waste discharging action. Finally, during the reset preparation stage, as the waste is discharged, when the next cycle of punching action starts, the moving mold 20 moves downward, and the punching part 40 drives the abutting part 50 to contact the abutting member 630 again, realizing the reset of the mechanism and preparing for the next punching cycle.

[0108] During the above process, it is necessary to ensure that the abutting member 630 slides only along the predetermined direction during the movement process, avoiding posture deviation resulting in unstable clamping or abnormal waste discharging. The spring 660 needs to accurately control the movement of the abutting member 630 to the preset waste discharging position through the defined preloading and release strokes, ensuring consistent and reliable waste discharging actions. And after the abutting plate 620 loses the support of the abutting member 630, it can rotate freely under the action of gravity, quickly open the waste discharging channel, and guide the waste to slide down smoothly. Moreover, the guide post 643 and the limiting member 644 jointly prevent the clamping member 641 from detaching or abnormally displacing during the elastic action process, ensuring the coherence and reliability of the clamping and waste discharging actions.

[0109] In this embodiment, by providing a guiding hole 612 on the base 610, arranging a guiding shaft 650 and sleeving a spring 660 between the abutting member 630 and the base 610, the abutting member 630 can achieve automatic and controlled movement during the waste discharging stage. Meanwhile, by the rotation of the abutting plate 620 to form a sliding surface, the punching waste can be effectively guided to discharge smoothly, avoiding waste retention and jamming, thus ensuring the coherence and beat stability of the energy-absorbing box 90 rib punching operation and improving the overall operation efficiency of the die. In addition, through the cooperation of the guiding column 643 and the limiting member 644 in the clamping assembly 640, the reliability of the rib clamping action is further enhanced, preventing the clamping member 641 from falling off or abnormally displacing. Overall, the failure rate and maintenance frequency of the die are reduced, and the operation stability and production economy of the energy-absorbing box 90 stamping production line are significantly improved.

[0110] Further, the preset distance is obtained through the following formula:

[0111] The preset distance is defined as , Satisfying:

[0112]

[0113] Wherein, is the distance from the rotation axis of the abutting plate 620 to the distal end of the abutting surface 621, is the rotation angle of the abutting plate 620 after the third inclined surface 632 is completely separated from the fourth inclined surface 510.

[0114] Specifically:

[0115] The preset position (distance) where the abutting member 630 moves in the "first direction" under the push of the spring 660 after the punching is completed, so that the edge of the abutting member 630 towards the moving die direction is docked with the lower edge of the abutting plate 620 after it rotates around the axis, thereby forming a sliding surface to realize the sliding and discharging of the waste.

[0116] : The length of the abutting plate 620 from the rotation axis to the lower edge (the most distal end of the abutting surface 621), which is a known component and can be measured and determined in the actual structure.

[0117] : The rotation angle of the abutting plate 620 after it is released and rotates around the axis (in the waste discharging state, recommended to be 25° to 45°).

[0118] : The horizontal distance that the abutting member 630 needs to retract, that is, the required "preset distance", which can be deduced from the waste discharging action.

[0119] Wherein, the first direction is the horizontal direction.

[0120] 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. ):

[0121] 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.

[0122] Please refer to Figure 1 , Figure 6 and Figure 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 110. 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 210.

[0123] Specific:

[0124] 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.

[0125] 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.

[0126] After the preliminary positioning of the mold, the energy-absorbing box 90 is placed on the second installation plane 110 of the fixed mold 10, and the area of the rib plate to be punched is directly opposite to the punching part 40 and the clamping part 641. The moving mold 20 drives the punching part 40 and the abutting part 50 to move towards the fixed mold 10, and the clamping mechanism 60 (the abutting plate 620, the clamping part 641) acts synchronously, so that the clamping part 641 abuts against the bottom surface of the rib plate. Since the punching part 40 is provided with a first profiling groove 410 and the clamping part 641 is provided with a second profiling groove, the two are precisely fitted with the protruding structures on the surface and bottom surface of the rib plate respectively, forming an upper and lower double-sided covering and clamping. Then, the punching part 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 uniformly stressed and stably fitted during the entire punching process, avoiding deflection, tearing or shear deformation.

[0127] The above-mentioned first profiling groove 410 matches the shape of the protrusion on the upper surface of the rib plate, and the second profiling groove matches the shape of the protrusion on the bottom of the rib plate, ensuring a complete support surface before punching. Moreover, the punching part 40 and the clamping part 641 clamp the rib plate synchronously up and down, ensuring that the area of the rib plate to be punched is in a stable state before and after punching, and preventing punching deviation or deformation caused by local degrees of freedom.

[0128] In this embodiment, by respectively arranging profiling grooves on the punching part 40 and the clamping part 641 that are adapted to the protruding structures of the area of the rib plate to be punched, a comprehensive support for the surface of the rib plate before punching is realized, greatly improving the fitting degree between the punching part 40 and the rib plate. Thus, the problem of punching force deviation caused by local protrusions on the surface of the rib plate is effectively avoided, preventing the generation of punching tears, shear abnormalities or incision burrs, further improving the uniformity of the force during the punching process, and significantly improving the flatness and dimensional accuracy of the punching cut; at the same time, this technical solution can adapt to the production requirements of diverse and complex rib plate structures, enhancing the flexible manufacturing ability of the mold and the overall yield of the energy-absorbing box 90, reducing the product rejection rate caused by poor punching, and significantly improving the stability and economic benefits of the production line.

[0129] Please refer to Figures 6 to 7 . In some embodiments, a first avoidance groove 634 is formed on the abutting part 50, and the first avoidance groove 634 is configured to allow the guide post 643 and the limiting part 644 to pass through when the base 610 rotates relatively. The abutting part 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 such that when the abutting part 50 moves towards the fixed mold 10 along with the punching part 40, the fourth inclined surface 510 of the abutting part 50 can abut against the third inclined surface 632.

[0130] Specifically:

[0131] The first avoidance groove 634 is formed in the body structure of the abutting member 50, and the position of the first avoidance groove 634 corresponds to the guide post 643 and the limiting member 644 of the clamping assembly 640. The first avoidance groove 634 penetrates through the thickness direction of the abutting member 50, and its size matches the outer dimensions of the guide post 643 and the limiting member 644, allowing the guide post 643 and the limiting member 644 to smoothly pass through during the rotation of the abutting member 50 relative to the base 610 without interfering with the abutting member 50. One side of the inner wall of the second avoidance groove 635 is provided with a third inclined surface 632 for mating contact with the third inclined surface 632 of the abutting member 630. The second avoidance groove 635 is designed as an open groove to ensure that when the punching member 40 drives the abutting member 50 to move towards the fixed die 10, the fourth inclined surface 510 on the abutting member 50 can smoothly contact and form a stable inclined surface linkage with the third inclined surface 632 of the abutting member 630 within the area of the second avoidance groove 635, without affecting the coherence of the punching action due to structural interference.

[0132] The above overall design ensures the spatial compatibility and action coherence among the punching member 40, the abutting member 50, the abutting member 630, and the clamping assembly 640 during the working process.

[0133] During the punching process, the energy absorption box 90 is first placed on the fixed die 10 for positioning, and the moving die 20 drives the punching member 40 and the abutting member 50 to move towards the fixed die 10. The abutting member 50 moves downward with the punching member 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 member 630. At the same time, the abutting member 50 rotates slightly relative to the base 610, and due to the provision of the first avoidance groove 634, the guide post 643 and the limiting member 644 of the clamping assembly 640 can smoothly pass through without interfering with the abutting member 50, ensuring the smooth progress of the clamping action.

[0134] The above first avoidance groove 634 enables the guide post 643 and the limiting member 644 to smoothly pass through the abutting member 50 when the abutting member 50 rotates relative to the base 610, avoiding mechanism interference or jamming phenomena and ensuring the reliable completion of the clamping action. The second avoidance groove 635 enables the fourth inclined surface 510 to accurately contact the third inclined surface 632 of the abutting member 630 within the area of the avoidance groove during the movement of the abutting member 50 with the punching member 40, forming a stable inclined surface linkage push to drive the abutting member 630 to move, thereby completing the reliable clamping and punching of the rib plate. The third inclined surface 632 is provided on the inner wall of the second avoidance groove 635, which helps to avoid impact or misalignment during the butt-joint of the inclined surfaces and improve the consistency and smoothness of the mechanism linkage before punching.

[0135] In this embodiment, by providing a first avoidance groove 634 on the abutting member 50, the guide post 643 and the limiting member 644 in the clamping assembly 640 can smoothly pass through during the movement of the abutting member 50, avoiding problems such as clamping action failure or punching abnormality caused by structural interference; by providing a second avoidance groove 635, when the abutting member 50 moves toward the fixed mold 10 along with the punching member 40, it can smoothly cooperate with the abutting member 630 to form a stable pushing linkage, so as to ensure reliable clamping support for the rib plate before punching; this technical solution effectively improves the movement coordination of each component inside the mold under high-frequency operation, reduces the occurrence rate of jamming and failures, further improves the consistency and stability of the punching action, significantly improves the overall quality and production efficiency of the rib plate punching process of the energy-absorbing box 90, and at the same time enables the stamping die to adapt to the rib plate design of the energy-absorbing box 90 with more complex and diverse structures, enhancing the flexible manufacturing ability and production adaptability of the die system.

[0136] Please refer to Figures 3 to 5 。In order to prevent the abutting member 50 from separating from the base 610 during the process of moving toward or away from the first inclined surface 622, in some embodiments, the moving direction of the abutting member 630 is defined as the first direction, and the base 610 is provided with a limiting sliding groove 613 along the first direction. A limiting sliding block 633 is provided on the side of the abutting member 630 facing the base 610, and the limiting sliding block 633 Slide is arranged in the limiting sliding groove 613, and the limiting sliding block 633 is configured to be restricted to move along the first direction in the limiting sliding groove 613 when the abutting member 630 and the base 610 move relatively.

[0137] Specifically:

[0138] The base 610 is provided with a limiting sliding groove 613 along the moving direction of the abutting member 630 (defined as the first direction). The limiting sliding groove 613 is a strip-shaped groove structure, extending along the first direction, and its length is greater than or equal to the moving stroke range of the abutting member 630, and the width is adapted to the size of the limiting sliding block 633 to ensure free sliding and prevent detachment. A limiting sliding block 633 is provided on the side of the abutting member 630 facing the base 610, and the size and shape of the limiting sliding block 633 match the limiting sliding groove 613 of the base 610. Specifically, the cross-sectional shape of the limiting sliding block 633 is a "T" - shaped structure, and the shape of the limiting sliding groove 613 also matches it, so that the abutting member 630 is restricted by the limiting sliding groove 613 in the direction perpendicular to the limiting sliding groove 613, preventing the abutting member 630 from shifting, lifting or separating during the movement in the first direction. Through the above structural design, the abutting member 630 can move stably and controllably along the first direction during the process of being pushed by the punching action, and always maintain the connection relationship with the base 610, preventing structural detachment or interference failure caused by inertia, elastic rebound or operation impact.

[0139] In the clamping and punching preparation stage, the moving die 20 drives the punching part 40 and the abutting part 50 to move downward towards the fixed die 10. The abutting part 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 chute 613, thereby restricting the abutting member 630 to move only along the first direction without deviation or detachment. In the punching and clamping formation stage, the abutting member 630 slides in the limiting chute 613 to a specified position, and pushes the abutting plate 620 to rotate through the second inclined surface 631, so that the abutting surface 621 forms a reliable abutting and clamping with the bottom surface of the rib plate. In the waste discharging stage, the moving die 20 rises, and the abutting member 630 retreats under the action of the spring 660 force. The limiting slider 633 continues to move in the limiting chute 613 to ensure that the abutting member 630 smoothly returns to the preset position. At the same time, the abutting plate 620 rotates to form a waste sliding channel to complete the waste discharging. Finally, in the overall reset stage, at the beginning of the next punching cycle, the abutting member 630 and the limiting slider 633 are already in the starting position, and the mechanism stably and reliably re-enters the clamping preparation state.

[0140] It should be noted that the limiting slider 633 must accurately slide in the limiting chute 613 to prevent the abutting member 630 from detaching or skewing due to external force or vibration, and ensure the continuous stability of the punching and clamping actions. Moreover, the length of the limiting chute 613 needs to be greater than the maximum moving stroke of the abutting member 630, and the appropriate depth of the limiting chute 613 (usually 1.2 times to 1.5 times the height of the slider) is selected according to the working conditions to balance smooth sliding and reliable limiting. The limiting slider 633 and the abutting member 630 can be connected by threads or fixed by welding to ensure the connection firmness under high-frequency movement.

[0141] In this embodiment, by providing a matching structure of the limiting slider 633 and the limiting chute 613 between the abutting member 630 and the base 610, it effectively prevents the abutting member 630 from accidentally detaching due to inertia, impact or elastic reaction during the movement, improves the stability of the clamping and waste discharging actions, ensures the attitude consistency and controlled movement of each moving unit inside the mold, reduces the risk of jamming, misalignment or punching failure caused by component separation, further improves the coherence and reliability of the punching action, significantly improves the consistency of the rib plate punching quality, prolongs the service life of the mold at the same time, reduces the maintenance frequency and operation cost, enhances the adaptability of the mold to the high-frequency and long-time continuous operation environment, and thus effectively improves the overall efficiency and operation stability of the production line.

[0142] Please refer to Figures 6 to 7In order to prevent the first inclined surface 622 of the abutting plate 620 from scratching the second inclined surface 631 of the abutting member 630 during rotation, in some embodiments, the first inclined surface 622 is located on the side of the abutting plate 620 facing the base 610, and the connection between the edge of the first inclined surface 622 close to the moving mold 20 side and the side of the abutting plate 620 facing the base 610 is configured as an arc chamfer 624.

[0143] Specifically:

[0144] At the edge position of the side of the abutting plate 620 facing the base 610 (i.e., one end close to the moving mold 20 direction), the junction part of the first inclined surface 622 and the side of the abutting 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 abutting member 630 and the abutting plate 620, the inclined surface contact pressure, and the desired contact area. Moreover, 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 abutting plate 620, avoiding the occurrence of scratching and nibbling phenomena, and ensuring the smooth and reliable operation of the mechanism.

[0145] In the initial state, the abutting plate 620 is in a free rotation ready state, and the abutting surface 621 of the abutting plate 620 has not contacted the rib plate yet. In the clamping formation stage, the moving mold 20 drives the punching member 40 and the abutting member 50 to press down. The fourth inclined surface 510 of the abutting member 50 pushes the third inclined surface 632 of the abutting member 630 to move, and the abutting member 630 pushes the first inclined surface 622 of the abutting plate 620 via the second inclined surface 631. As the abutting member 630 pushes, the abutting plate 620 rotates around the rotation axis, making the abutting surface 621 gradually approach and abut against the bottom surface of the rib plate. When the abutting member 630 pushes the abutting plate 620 to rotate, since the arc chamfer 624 is provided on the side of the first inclined surface 622 close to the moving mold 20, the initial contact between the second inclined surface 631 of the abutting member 630 and the first inclined surface 622 of the abutting plate 620 changes from point contact or line contact to arc surface transition contact, reducing the local contact stress and effectively avoiding scratching or wear on the inclined surface. After the abutting is completed, the punching member 40 is pressed in to complete the punching of the area to be punched of the rib plate. Subsequently, the moving mold 20 rises, the abutting member 50 is separated from the abutting member 630, the abutting plate 620 loses the thrust, rotates and guides the waste to slide off, and the action is coherent and smooth.

[0146] The above-mentioned arc chamfer 624 converts the sliding friction generated during the rotation of the abutment plate 620 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 abutting member 630 to balance the structural strength and buffering performance. The arc chamfer 624 is usually processed by precision milling or grinding processes to ensure a continuous curved surface and a low surface roughness to reduce the friction coefficient.

[0147] In this embodiment, by providing an arc chamfer 624 at the edge of the first inclined surface 622 of the abutment plate 620, the local contact stress generated when the abutting member 630 pushes the abutment plate 620 to rotate is effectively reduced, preventing scratches and wear on the surface of the inclined surface, ensuring the smoothness and consistency of the rotation action of the abutment plate 620, improving the stability and reliability of the clamping action, extending the service life of the abutment plate 620 and the abutting member 630, reducing the die repair frequency caused by wear failure, further enhancing the overall working efficiency and service life of the stamping die, meeting the requirements of high-frequency and high-load continuous production, and at the same time enhancing the reliability and flexibility of the die under complex working conditions, reducing the equipment failure rate and the overall operation cost.

[0148] What is described above in this specification is only an example of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements or use similar ways to replace the specific embodiments described, as long as they do not deviate from the content of this specification of the present invention or exceed the scope defined by this claims, they should fall within the protection scope of the present invention.

Claims

1. A stamping die for the processing of an energy-absorbing box, the energy-absorbing box includes an internal cavity, and a rib plate is provided in the internal cavity. The rib plate includes a to-be-punched area, and a convex structure is provided at the to-be-punched area. It is 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, 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.

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 is sleeved outside the guide shaft, and two ends of the spring are respectively abutted against the abutting member and the base. Wherein, the stamping die includes a waste discharging state. When the stamping die is in the waste discharging state, the punching part moves away from the fixed die along with the movable die, the third inclined surface is separated from the fourth inclined surface, so that the abutting member moves a preset distance in a direction away from the first inclined surface under the elastic force of the spring, and the third inclined surface faces the upper edge of the movable die and the lower edge of the abutting plate that rotates relative to the base and faces the abutting member side are butted against each other, so that the completed punched rib plate on the clamping member slides down along the third inclined surface.

4. The stamping die according to claim 3, wherein: A guide hole is formed at the embedding groove of the abutting plate. The clamping assembly further includes: A guide post, one end of the guide post is connected to the clamping member, and the other end of the guide post passes through the guide hole. A limiting member, fixedly connected to the end of the guide post passing through the guide hole.

5. The stamping die according to claim 4, wherein The abutting member is provided with a first avoidance groove, and the first avoidance groove is configured to allow the guide post and the limiting member to pass through when the abutting member rotates relative to the base.

6. The stamping die according to claim 4 or 5, characterized in that, The abutting member is provided with a second avoidance groove, and the third inclined surface is formed on one side of the inner wall of the second avoidance groove. The second avoidance groove is configured to enable the fourth inclined surface of the abutting member to abut against the third inclined surface when the abutting member moves towards the fixed die along with the punching part.

7. The stamping die according to claim 1, wherein: The moving direction of the abutting member is defined as a first direction, and a limiting sliding groove is formed in the base along the first direction. A limiting sliding block is arranged on the abutting member, and the limiting sliding block is slidably arranged in the limiting sliding groove. The limiting sliding block is configured to be restricted to move along the first direction in the limiting sliding groove when the abutting member moves relatively to the base.

8. The stamping die according to claim 1, wherein: The elastic member is configured to apply an initial reaction force to the clamping member before the punching part contacts the to-be-punched area of the rib plate. The elastic member is configured to contract synchronously along with the clamping member moving towards the second installation plane when the punching part continuously moves towards the second installation plane and presses the completed punched rib plate into the embedding groove, so that the completed punched rib plate enters the embedding groove.

9. The stamping die according to claim 3, wherein, The preset distance is obtained by the following formula: The preset distance is defined as , which satisfies: ； Wherein, is the distance from the rotation axis of the abutting plate to the distal end of the abutting surface, is the rotation angle of the abutting plate after the third inclined surface and the fourth inclined surface are completely separated.

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

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