Stamping die

Abstract

The present application discloses a stamping die, which includes an upper die and a lower die; the upper die includes an upper template and a punch provided on the upper template; the lower die includes a lower template, a bearing seat provided on the lower template, and a limiting component provided on the lower template and disposed adjacent to the bearing seat. The limiting component includes a base disposed on the lower template and adjacent to the bearing seat and an abutting member. A sliding groove is provided on one side of the base facing the bearing seat, and a semi-circular arc surface matching the bottom of the sliding groove is provided on the abutting member. The abutting member is used to slide in the sliding groove to form a sliding track; when the upper die and the lower die are closed, the end of the composite material forms an arc-shaped stamping track based on the stamping of the punch, and the abutting member is forced to slide in the sliding groove based on being in contact with the end of the composite material, and the end of the composite material is restricted based on the sliding track and the stamping track with the same track. The stamping die of the present application reduces the probability of poor end face quality, cracking and fracture at the bending part after the composite material is bent.

Description

Technical Field

[0001] This application relates to the technical field of composite material stamping, and particularly relates to a stamping die. Background Art

[0002] Currently, when stamping composite materials, due to the differences in the bending properties of the materials in the composite materials, after the composite materials are bent, the end faces of the composite materials are uneven, resulting in poor end face quality of the composite materials. Moreover, due to the differences in the bending properties of the materials in the composite materials, the composite materials are prone to cracking and breaking at the bending points. Summary of the Invention

[0003] In view of the above, it is necessary to propose a stamping die to reduce the probability of poor end face quality, cracking and breaking at the bending points after the composite materials are bent.

[0004] An embodiment of this application provides a stamping die for stamping composite materials. The stamping die includes an upper die and a lower die arranged oppositely. The upper die includes an upper template and a punch head provided on the upper template. The lower die includes a lower template and a carrier seat provided on the lower template. The carrier seat is used to carry the composite materials. The lower die further includes a limiting component provided on the lower template and adjacent to the carrier seat. The limiting component includes a base and an abutting member. The base is provided on the lower template and adjacent to the carrier seat. A sliding groove is provided on one side of the base facing the carrier seat. The sliding groove includes a groove bottom and two opposite groove walls connecting the two sides of the groove bottom. A semi-circular arc surface matching the groove bottom is provided on the abutting member. The abutting member is used to slide in the sliding groove to form a sliding track and to fit the end of the composite material on the carrier seat. When the upper die and the lower die are closed, the end of the composite material forms an arc-shaped stamping track based on the stamping of the punch head. The abutting member is forced to slide in the sliding groove based on the fit with the end of the composite material, and the end of the composite material is restricted based on the sliding track and the stamping track with the same track.

[0005] In some embodiments, the limiting component further includes an elastic member and a connecting rod. A track groove matching the sliding track is provided on the groove wall. The track groove is connected to the sliding groove. The connecting rod passes through the track groove and is connected to the abutting member. One end of the connecting rod away from the abutting member is connected to one end of the elastic member, and the other opposite end of the elastic member is connected to the base.

[0006] In some embodiments, along the closing direction of the upper die and the lower die, the distance between the other opposite end of the elastic member and the lower template is greater than the distance between one end of the elastic member and the lower template.

[0007] In some embodiments, an inner concave arc surface is provided on one side of the groove wall facing the bearing seat.

[0008] In some embodiments, a step portion is provided at one end of the abutting member that abuts against the end portion of the composite material, and the step portion is used to bear and abut against the end portion of the composite material.

[0009] In some embodiments, two spaced positioning portions are provided at one end of the bearing seat that bears the composite material, and the composite material is accommodated between the two positioning portions to position the composite material.

[0010] In some embodiments, a protruding portion is provided at one end of the bearing seat that bears the composite material, and the protruding portion protrudes towards the base, and a receiving space for accommodating part of the base and part of the abutting member is formed between the protruding portion and the lower template.

[0011] In some embodiments, an outer convex arc surface is provided at one end of the protruding portion facing the base.

[0012] In some embodiments, the upper die further includes a pressing plate, the pressing plate is disposed on the side of the upper template facing the lower die, an avoidance groove is formed on the side of the pressing plate facing the lower die, a punching hole is further formed in the pressing plate, the punching hole is adjacent to and communicated with the avoidance groove, and the punching hole is correspondingly arranged with the punch head; when the upper die and the lower die are closed, the pressing plate presses the composite material onto the bearing seat, and when the pressing plate presses the composite material, the pressing plate extends into the avoidance groove based on the base, and the punch head punches the composite material through the punching hole.

[0013] In some embodiments, the lower die further includes a material ejecting assembly, the material ejecting assembly includes a material ejecting driving member and a material ejecting member, the material ejecting driving member is disposed below the lower template, and the material ejecting member is connected to the material ejecting driving member and movably passes through the lower template and the bearing seat to eject the punched composite material from the bearing seat under the drive of the material ejecting driving member.

[0014] When the above stamping die is in use, the composite material is placed on the bearing seat, and the end of the composite material protrudes from the bearing seat and abuts against the abutting member. When the upper die and the lower die are closed, the end of the composite material forms an arc-shaped stamping trajectory based on the punching of the punch. The abutting member slides in the sliding groove of the base due to the force exerted by abutting against the end of the composite material, and restricts the end of the composite material based on the sliding trajectory and the stamping trajectory of the same path. It can be understood that because the abutting member abuts against the end of the composite material, the end of the composite material will drive the abutting member to move synchronously when being punched by the punch. Moreover, the abutting member is supported by the bottom of the sliding groove and restricted by the two opposite groove walls, so that the abutting member always abuts against the end of the composite material, thereby enabling the abutting member to restrict the end of the composite material, preventing the end face of the composite material from extending disorderly and resulting in unevenness, and further reducing the probability of poor end face quality, cracking and fracture at the bending position after the composite material is bent. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic perspective view of the stamping die provided by an embodiment of the present application.

[0016] Figure 2 is Figure 1 a schematic perspective view of the bearing seat and the limiting component of the stamping die shown in the figure.

[0017] Figure 3 is Figure 1 a schematic perspective view of the upper die of the stamping die shown in the figure from another angle.

[0018] Figure 4 is Figure 1 a schematic perspective view of the ejector component of the stamping die shown in the figure.

[0019] Figure 5 is the state diagram Figure 1 when the composite material is placed on the stamping die shown in the figure.

[0020] Figure 6 is Figure 5 a state diagram when the pressing plate of the stamping die presses the composite material.

[0021] Figure 7 is Figure 6 a state diagram when the punch of the stamping die passes through the pressing plate and contacts the composite material.

[0022] Figure 8 is Figure 7 a process diagram when the punch of the stamping die punches the composite material.

[0023] Figure 9 is Figure 8Schematic diagram of the state of the punch of the stamping die after stamping the composite material into shape.

[0024] Figure 10 is Figure 9 Schematic diagram of the state of the stamping die after the die is opened.

[0025] Figure 11 is Figure 10 Schematic diagram of the state of the ejector assembly of the stamping die after ejecting the composite material.

[0026] Description of main component symbols

[0027] Stamping die 100

[0028] Upper die 10

[0029] Upper template 12

[0030] Punch 14

[0031] Avoidance surface 142

[0032] Pressure plate 16

[0033] Avoidance groove 162

[0034] Stamping hole 164

[0035] First guide cylinder 166

[0036] Guide post 18

[0037] Lower die 20

[0038] Lower template 22

[0039] Second guide cylinder 222

[0040] Carrier seat 24

[0041] Positioning part 242

[0042] Protruding part 244

[0043] Accommodation space 246

[0044] Ejection hole 248

[0045] Restriction component 26

[0046] Base 262

[0047] Sliding groove 2622

[0048] Bottom of the groove 2624

[0049] Groove wall 2626

[0050] Track groove 2628

[0051] Contact member 264

[0052] Step portion 2642

[0053] Elastic member 266

[0054] Connecting rod 268

[0055] Fixed rod 269

[0056] Ejector assembly 28

[0057] Ejector driving member 282

[0058] Ejector member 284

[0059] Ejector plate 286

[0060] Bottom plate 288

[0061] Limit side plate 289

[0062] Guide groove 2892

[0063] Limit groove 2894

[0064] Composite material 200

[0065] End portion 202 Specific implementation mode

[0066] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0067] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, it should be noted that the meaning of "plural" is two or more, unless otherwise specifically defined.

[0068] 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, an electrical connection or a connection capable of mutual communication. It may be directly connected, or indirectly connected through an intermediate medium. It may be the communication inside two elements or the interaction relationship between 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.

[0069] Some embodiments of the present application will be described in detail below with reference to the drawings.

[0070] Please refer to Figure 1 , some embodiments of the present application provide a stamping die 100. The stamping die 100 is used for stamping a composite material 200 (please refer to Figure 5 ). Among them, the composite material 200 may be composed of two-layer materials, or may be composed of three or more layers of materials. In this embodiment, the case where the composite material 200 is composed of two-layer materials is taken as an example for illustration. The two-layer materials are aluminum and titanium respectively. Obviously, this is not a limitation to the present application.

[0071] The stamping die 100 includes an upper die 10 and a lower die 20 which are oppositely arranged. It can be understood that the stamping die 100 in this embodiment can be applied to a punching press (not shown in the figure). The upper die 10 is connected to the upper platen of the punching press (not shown in the figure), and the upper die 10 moves with the upper platen of the punching press to facilitate providing a blank holding force and a bending force to the composite material 200. The lower die 20 is connected to the lower platen of the punching press (not shown in the figure) to facilitate providing a supporting force to the composite material 200.

[0072] The upper die 10 includes an upper template 12 and a punch 14 provided on the upper template 12. The lower die 20 includes a lower template 22 and a carrier seat 24 provided on the lower template 22. The carrier seat 24 is used to carry the composite material 200. Specifically, when the carrier seat 24 carries the composite material 200, the inner material of the composite material 200 close to the carrier seat 24 is aluminum, and the outer material of the composite material 200 away from the carrier seat 24 is titanium. The lower die 20 further includes a limiting component 26 provided on the lower template 22 and adjacent to the carrier seat 24.

[0073] Further, please refer to Figure 2 , the limiting component 26 includes a base 262 and an abutting member 264. The base 262 is provided on the lower template 22 and adjacent to the carrier seat 24. A sliding groove 2622 is provided on one side of the base 262 facing the carrier seat 24. The sliding groove 2622 includes a groove bottom 2624 and two opposite groove walls 2626 connecting the two sides of the groove bottom 2624. A semi-circular arc surface (please refer to Figure 5 ) matching the groove bottom 2624 is provided on the abutting member 264. The abutting member 264 is used to slide in the sliding groove 2622 to form a sliding track and fit the end 202 of the composite material 200 on the carrier seat 24 (please refer to Figure 5 ). When the upper die 10 and the lower die 20 are closed, the end 202 of the composite material 200 forms an arc-shaped stamping track based on the stamping of the punch 14. The abutting member 264 is stressed and slides in the sliding groove 2622 based on fitting with the end 202 of the composite material 200, and restricts the end 202 of the composite material 200 based on the sliding track and the stamping track with the same track. Specifically, the upper template 12 can be used to connect to the upper platen of the punching machine, and the lower template 22 can be used to connect to the lower platen of the punching machine. The sliding track can be understood as the movement track of the abutting member 264 under the support of the groove bottom 2624 and the restriction of the two opposite groove walls 2626. The stamping track can be generally understood as the arc-shaped movement track formed by the end 202 of the composite material 200 bending with the bending point as the center.

[0074] In this embodiment, the composite material 200 can be a linear structure (please refer to Figure 5 ). The stamping die 100 is used to stamp the composite material 200 from a linear structure into a U-shaped structure (please refer to Figure 9 ). The two opposite ends 202 of the composite material 200 are bent under the punching force of the punch 14. Specifically, the number of punches 14 is two, and the number of limiting components 26 is two and are respectively provided on the opposite sides of the carrier seat 24. The two punches 14 correspond to the two limiting components 26 one by one, and the two limiting components 26 are respectively used to fit the two opposite ends 202 of the composite material 200.

[0075] Understandably, in other embodiments, the stamping die 100 can also be used to stamp composite materials 200 of more shapes. Correspondingly, the number of punches 14 and limiting components 26 can be adaptively changed, such as being more or fewer, and the relative positions of the limiting components 26 and the carrier base 24 can also be adaptively changed.

[0076] Specifically, the relevant components of the stamping die 100 will be further described below.

[0077] Please refer to Figure 2 , in this embodiment, before the sliding groove 2622 is opened, the base 262 is generally a regular quadrangular prism, the groove bottom 2624 of the sliding groove 2622 is an arc surface, and the abutting member 264 is provided with a semi-circular arc surface matching the groove bottom 2624. In this way, on the one hand, the semi-circular arc surface of the abutting member 264 can more easily fit tightly with the arc-shaped groove bottom 2624, and it is not easy for the abutting member 264 and the groove bottom 2624 to be not tightly fitted. The groove bottom 2624 can provide a stable supporting force for the abutting member 264, so that the abutting member 264 can always fit the end 202 of the composite material 200, facilitating the limitation of the end 202 of the composite material 200. On the other hand, when the semi-circular arc surface of the abutting member 264 slides on the arc-shaped groove bottom 2624, the abutting member 264 and the groove bottom 2624 are in line contact, which is beneficial to reducing the friction force between the abutting member 264 and the groove bottom 2624, thereby reducing the obstruction to the abutting member 264.

[0078] In this embodiment, in order to enable the abutting member 264 of the limiting component 26 to achieve the function of automatic reset, the limiting component 26 further includes an elastic member 266 and a connecting rod 268. A track groove 2628 matching the sliding track is provided on the groove wall 2626 of the sliding groove 2622. The track groove 2628 is communicated with the sliding groove 2622. The connecting rod 268 passes through the track groove 2628 and is connected to the abutting member 264. One end of the connecting rod 268 away from the abutting member 264 is connected to one end of the elastic member 266, and the other opposite end of the elastic member 266 is connected to the base 262. Among them, along the die closing direction of the upper die 10 and the lower die 20, the distance between the other opposite end of the elastic member 266 and the lower template 22 is greater than the distance between one end of the elastic member 266 and the lower template 22. In this way, by providing the limiting component 26 with the elastic member 266 and the connecting rod 268, when the abutting member 264 slides in the sliding groove 2622, the elastic member 266 will be stretched. The elastic member 266 is stretched to generate elastic force. After the composite material 200 is stamped and taken away, the elastic member 266 elastically recovers and drives the abutting member 264 to slide reversely in the sliding groove 2622 and then reset, so that the abutting member 264 of the limiting component 26 realizes the function of automatic reset.

[0079] Specifically, in this embodiment, track grooves 2628 are provided on both opposite groove walls 2626. The number of elastic members 266 is two, and the number of connecting rods 268 is one. The connecting rod 268 sequentially passes through one of the track grooves 2628, the abutting member 264, and the other track groove 2628. Both ends of the connecting rod 268 are connected to the elastic members 266, and the elastic members 266 are connected to the base 262 through the fixing rods 269 provided on the base 262 to achieve connection with the base 262. In this way, the abutting member 264 of the limiting component 26 realizes the function of automatic reset.

[0080] In this embodiment, the side of the groove wall 2626 facing the bearing seat 24 is provided with a concave arc surface. In this way, by providing the concave arc surface on the groove wall 2626, the base 262 can be arranged closer to the bearing seat 24, thereby reducing the space occupied by the bearing seat 24 and the limiting component 26, and making the structure of the lower die 20 more compact.

[0081] In this embodiment, a step portion 2642 is provided at one end of the abutting member 264 that abuts against and conforms to the end portion 202 of the composite material 200. The step portion 2642 is used to carry and conform to the end portion 202 of the composite material 200. Two spaced positioning portions 242 are provided at one end of the bearing seat 24 for carrying the composite material 200. The composite material 200 is accommodated between the two positioning portions 242 to position the composite material 200. In this way, by providing the step portion 2642, when placing the composite material 200 on the bearing seat 24, the composite material 200 can be placed between the two positioning portions 242 of the bearing seat 24 from above the bearing seat 24 and the limiting component 26, and the end portion 202 of the composite material 200 is carried and abutted against the step portion 2642, thereby completing the feeding of the composite material 200 and making the end portion 202 of the composite material 200 conform to the abutting member 264. The feeding operation of the composite material 200 and the operation of making the end portion 202 of the composite material 200 conform to the abutting member 264 are simple and fast, which is beneficial to reducing the requirements for the skills of the operators and can also reduce the labor intensity of the operators.

[0082] In this embodiment, in order to increase the movement range of the abutting member 264, thereby increasing the bendable angle of the composite material 200, two protruding portions 244 are provided at one end of the carrier base 24 that carries the composite material 200. The two protruding portions 244 correspond to the two limiting components 26 one by one. Each protruding portion 244 protrudes and extends toward the corresponding base 262. A receiving space 246 for accommodating a part of the base 262 and a part of the abutting member 264 is formed between the protruding portion 244 and the lower template 22. The end of the protruding portion 244 facing the base 262 is provided with a convex arc surface. Among them, the two positioning portions 242 are both located between the two protruding portions 244. Thus, by providing the protruding portion 244 and the receiving space 246 formed based on the protruding portion 244, when the abutting member 264 slides in the sliding groove 2622, the receiving space 246 can accommodate a part of the abutting member 264 and a part of the base 262 to increase the movement range of the abutting member 264, thereby increasing the bendable angle of the composite material 200, which is beneficial to achieving various different stamping requirements. By providing the protruding portion 244 with a convex arc surface, the composite material 200 can be smoothly bent on the protruding portion 244.

[0083] It can be understood that in other embodiments, the number of the protruding portions 244 can be the same as and corresponding to the number of the limiting components 26, and this embodiment will not be described in detail herein.

[0084] Among them, the carrier base 24 and the limiting component 26 can be embedded in the lower template 22 by screws to facilitate increasing the connection tightness between the carrier base 24, the limiting component 26 and the lower template 22. The lower template 22 can be a single-layer board or can be composed of multiple-layer boards laminated together. The present application does not limit this.

[0085] Please refer to Figures 1 to 3 , in this embodiment, in order to prevent the punch 14 from interfering with the limiting component 26 when stamping the composite material 200, taking the punch 14 when stamping the composite material 200 as a reference, an avoidance surface 142 is provided on the side of the punch 14 facing away from the composite material 200. The avoidance surface 142 can be a curved surface, an inclined surface, etc., so that one end of the punch 14 for stamping the composite material 200 is substantially wedge-shaped, so that when the punch 14 stamps the composite material 200, the sliding groove 2622 and the abutting member 264 are avoided through the wedge-shaped end, ensuring that the punch 14 can smoothly stamp the composite material 200. Among them, the punch 14 can be embedded in the upper template 12 by screws to facilitate increasing the connection tightness between the punch 14 and the upper template 12. The upper template 12 can be a single-layer board or can be composed of multiple-layer boards laminated together. The present application does not limit this.

[0086] In this embodiment, in order to enable the punch 14 to smoothly punch the composite material 200, the upper die 10 further includes a pressing plate 16. The pressing plate 16 is disposed on one side of the upper template 12 facing the lower die 20. Two avoidance grooves 162 are formed on one side of the pressing plate 16 facing the lower die 20. The pressing plate 16 is further provided with two punching holes 164. Each punching hole 164 is adjacent to and communicates with the corresponding avoidance groove 162. The two punching holes 164 are arranged in one-to-one correspondence with the two punches 14. When the upper die 10 and the lower die 20 are closed, the pressing plate 16 presses the composite material 200 between the two positioning portions 242. When the pressing plate 16 presses the composite material 200, the pressing plate 16 extends into the avoidance groove 162 based on the base 262 to avoid the base 262, and the punch 14 passes through the corresponding punching hole 164 to punch the composite material 200. Thus, by providing the pressing plate 16, before the punch 14 punches the composite material 200, the pressing plate 16 moves close to the lower die 20 to press the composite material 200 between the two positioning portions 242 of the bearing seat 24, preventing the composite material 200 from shaking on the bearing seat 24 and ensuring that the punch 14 can smoothly punch the composite material 200. In addition, by providing the avoidance groove 162, the pressing plate 16 can closely fit the composite material 200, facilitating pressing the composite material 200 onto the bearing seat 24.

[0087] It can be understood that in other embodiments, the number of the avoidance grooves 162 and the punching holes 164 on the pressing plate 16 can be consistent with and corresponding to the number of the limiting components 26, which will not be described in detail in this embodiment.

[0088] In this embodiment, in order to ensure the closing accuracy between the upper die 10 and the lower die 20 when the upper die 10 and the lower die 20 are closed, the upper die 10 further includes four guide columns 18. The four guide columns 18 are roughly disposed at the four corners of the upper template 12. Four first guide cylinders 166 are embedded in the pressing plate 16. The four guide cylinders 166 are in one-to-one correspondence and are adapted to the four guide columns 18. Four second guide cylinders 222 are embedded in the lower template 22 of the lower die 20. The four second guide cylinders 222 are in one-to-one correspondence and are adapted to the four guide columns 18. Thus, by providing the guide columns 18, the first guide cylinders 166 and the second guide cylinders 222, when the upper die 10 and the lower die 20 are closed, through the cooperation between the guide columns 18 and the first guide cylinders 166, the punch 14 can accurately pass through the punching holes 164, and through the cooperation between the guide columns 18 and the second guide cylinders 222, the punch 14 can accurately punch the composite material 200 into a preset shape, thereby ensuring the closing accuracy between the upper die 10 and the lower die 20.

[0089] Please refer to Figures 1 to 4, in this embodiment, the lower die 20 further includes an ejector assembly 28. The ejector assembly 28 includes an ejector driving member 282 and an ejector member 284. The ejector driving member 282 is disposed below the lower template 22. The ejector member 284 is connected to the ejector driving member 282 and movably passes through the lower template 22 and the carrier 24. When the ejector member 284 passes through the carrier 24, it is located between the two positioning portions 242. The ejector member 284 ejects the stamped composite material 200 from the carrier 24 under the drive of the ejector driving member 282. Specifically, the number of the ejector members 284 is two. The ejector driving member 282 can be connected to the two ejector members 284 through an ejector plate 286. The two ejector members 284 are spaced apart on the ejector plate 286. When it is necessary to eject the stamped composite material 200, the ejector member 284 passes through the ejection hole 248 on the carrier 24 under the drive of the ejector driving member 282 to eject the stamped composite material 200 from the carrier 24. After the stamped composite material 200 is ejected, the ejector member 284 is received in the ejection hole 248 on the carrier 24 under the drive of the ejector driving member 282 and does not protrude from the ejection hole 248 to avoid interference when placing a new composite material 200. Thus, by providing the ejector assembly 28, it is convenient to eject the stamped composite material 200 after stamping the composite material 200. The ejector driving member 282 can be a linear cylinder or other mechanism that can drive the ejector member 284 or the ejector plate 286 to perform linear motion. It can be understood that the number of the ejector members 284 can also be one, three or more, which can be specifically set according to the actual situation.

[0090] Further, in this embodiment, the ejector assembly 28 further includes a bottom plate 288 and limiting side plates 289 carried on the bottom plate 288. The bottom plate 288 is disposed opposite to the lower template 22 and is located below the ejector driving member 282. The bottom plate 288 is used for installing and supporting the ejector driving member 282. The number of the limiting side plates 289 is two, and the two limiting side plates 289 are spaced apart. The two limiting side plates 289 are respectively connected to the lower template 22 and the bottom plate 288, so as to form a space for the ejector driving member 282 and the ejector plate 286 to move between the lower template 22 and the bottom plate 288. On one side of each limiting side plate 289 facing the ejector driving member 282, there are a guiding groove 2892 and a limiting groove 2894 which are communicated with each other. The bottom surface of the guiding groove 2892 is a plane, and the bottom surface of the limiting groove 2894 is an inclined surface inclined towards the ejector driving member 282. Thus, by providing the guiding groove 2892 on the limiting side plate 289, the ejector plate 286 can be guided when the ejector driving member 282 drives the ejector plate 286 and the ejector member 284 to move upward. By providing the limiting groove 2894 with an inclined bottom surface on the limiting side plate 289, when the ejector driving member 282 drives the ejector plate 286 and the ejector member 284 to move downward, the distance between the ejector plate 286 and the bottom surface of the limiting groove 2894 gradually becomes smaller until the ejector plate 286 abuts against the bottom surface of the limiting groove 2894, so as to achieve the effect of limiting the downward movement of the ejector plate 286, and further limit the downward stroke of the ejector driving member 282. It can be understood that when the ejector driving member 282 drives the ejector plate 286 and the ejector member 284 to move upward, the distance between the ejector plate 286 and the lower template 22 gradually becomes smaller until the ejector plate 286 abuts against the lower template 22, so as to achieve the effect of limiting the upward movement of the ejector plate 286, and further limit the upward stroke of the ejector driving member 282.

[0091] Please refer to the following in combination Figures 5 - 11 to describe the usage process of the stamping die 100 of the present application in detail. Among them, for the convenience of observation and understanding, Figures 5 - 11 part of the structures in are shown in dotted lines. The composite material 200 is in a linear structure before stamping and in a U-shaped structure after stamping. The stamping die 100 is installed in a punching press. The upper die 10 is connected to the upper platen of the punching press, and the upper template 12 and the pressing plate 16 can move independently under the control of the upper platen. The lower die 20 is connected to the lower platen of the punching press. Obviously, the following description of the usage of the stamping die 100 is not a limitation to the embodiment of the present application. Specifically, the detailed process of the stamping die 100 of this embodiment in use is as follows.

[0092] Please refer to Figure 5, when the upper die 10 and the lower die 20 are in the open die state, the ejector member 284 of the lower die 20 is received inside the carrier 24 under the drive of the ejector driving member 282. The operator manually or uses a feeding mechanism such as a robot to place the composite material 200 between the two positioning portions 242 of the carrier 24 from above the carrier 24 and the limiting component 26, and at the same time makes the two ends 202 of the composite material 200 fit on the step portions 2642 of the corresponding abutting members 264. In this way, the feeding operation of the composite material 200 and the operation of making the ends 202 of the composite material 200 fit with the abutting members 264 are realized.

[0093] Please refer to Figure 6 , the upper table controls the pressing plate 16 of the upper die 10 to move closer to the lower die 20, so that the pressing plate 16 presses the composite material 200 onto the carrier 24. In this way, the effect of pressing the composite material 200 onto the carrier 24 is realized.

[0094] Please refer to Figure 7 , the upper table controls the upper template 12 of the upper die 10 to move closer to the pressing plate 16. The upper template 12 drives the punch 14 to move closer to the pressing plate 16. The guide post 18 passes through the first guide cylinder 166 on the pressing plate 16 to guide the movement direction of the upper die 10. The punch 14 passes through the punching hole 164 and abuts against the composite material 200.

[0095] Please refer to Figure 8 , the upper table continues to control the upper template 12 of the upper die 10 to move closer to the pressing plate 16, so that the punch 14 continues to move closer to the lower die 20 under the drive of the upper template 12 to punch the composite material 200. During the process of the punch 14 punching the composite material 200, the abutting member 264 slides in the sliding groove 2622 due to the force received from fitting with the end 202 of the composite material 200, and based on the sliding track and the punching track with the same trajectory, it always restricts the end 202 of the composite material 200, avoiding the situation that the end 202 of the composite material 200 extends disorderly at the end face during the punching process, resulting in unevenness, tearing at the bending part, and fracture; at the same time, when the abutting member 264 slides in the sliding groove 2622, the elastic member 266 is continuously stretched by the connecting rod 268, and the elastic member 266 generates an elastic force under the stretching effect.

[0096] Please refer to Figure 9, the upper platen continues to control the upper template 12 of the upper die 10 to move closer to the pressure plate 16, so that the punch 14 continues to move closer to the lower die 20 under the drive of the upper template 12 to continue stamping the composite material 200. After stamping is completed, the end 202 of the composite material 200 fits on the protruding portion 244 of the carrier seat 24, and the composite material 200 is stamped into a U-shaped structure. Part of the abutting member 264 is located in the accommodating space 246, and the elastic member 266 is stretched to the maximum extent. Among them, the width of the punch 14 is smaller than the distance between the two opposite groove walls 2626, and the punch 14 will not interfere with the limiting component 26.

[0097] Please refer to Figure 10 , the upper platen controls the upper template 12 and the pressure plate 16 of the upper die 10 to move upward in sequence or controls the upper template 12 and the pressure plate 16 to move upward simultaneously. The upper template 12 drives the punch 14 to move away from the lower die 20, so that the upper die 10 and the lower die 20 are in the open die state.

[0098] Please refer to Figure 11 , the ejector driving member 282 of the lower die 20 drives the ejector plate 286 and the ejector member 284 to move closer to the upper die 10, so that the ejector member 284 passes through the lower template 22 and the carrier seat 24 to lift the stamped composite material 200, facilitating the operator or the feeding mechanism to take away the stamped composite material 200 from the carrier seat 24. At the same time, since the stamped composite material 200 is lifted, the end 202 of the composite material 200 no longer fits with the abutting member 264, and the abutting member 264 no longer receives the force of the composite material 200. The elastic member 266 elastically returns and drives the abutting member 264 to slide reversely in the sliding groove 2622 to reset. Further, after taking away the stamped composite material 200, the ejector driving member 282 then drives the ejector plate 286 and the ejector member 284 to move away from the upper die 10 to reset to the state before the stamping die 100 shown in Figure 5 places the composite material 200.

[0099] For the stamping die 100 provided in this embodiment, the end 202 of the composite material 200 forms an arc-shaped stamping trajectory based on the stamping of the punch 14. The abutting member 264 slides in the sliding groove 2622 of the base 262 due to the force received by fitting with the end 202 of the composite material 200, so that the abutting member 264 moves synchronously with the end 202 of the composite material 200, and based on the sliding trajectory and the stamping trajectory of the same trajectory, the abutting member 264 restricts the end 202 of the composite material 200, avoiding the disorderly extension of the end face of the composite material 200 resulting in unevenness, avoiding the generation of tensile stress in the composite material 200, and reducing the probability of poor end face quality, cracking at the bending part, and fracture after the composite material 200 is bent.

[0100] For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present application is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present application.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A stamping die for stamping a composite material, the stamping die comprising an upper die and a lower die arranged opposite to each other, the upper die comprising an upper die plate and a punch provided on the upper die plate, the lower die comprising a lower die plate and a bearing seat provided on the lower die plate, the bearing seat being used to support the composite material, characterized in that: The lower mold also includes a limiting component arranged on the lower mold and adjacent to the supporting seat, the limiting component includes a base and an abutment, the base is arranged on the lower mold and adjacent to the supporting seat, the base is provided with a sliding groove on the side facing the supporting seat, the sliding groove includes a groove bottom and two opposite groove walls connecting the two sides of the groove bottom, the abutment is provided with a semicircular arc surface matching the groove bottom, the abutment is used to slide in the sliding groove to form a sliding track, and to fit the end of the composite material on the supporting seat; wherein, when the upper mold and the lower mold are closed, the end of the composite material forms an arc-shaped stamping track based on the punch stamping, the abutment slides in the sliding groove under force based on the fit with the end of the composite material, and limits the end of the composite material based on the sliding track and the stamping track of the same track.

2. The stamping die according to claim 1, wherein: The limiting assembly also includes an elastic member and a connecting rod. A track groove matching the sliding track is provided on the groove wall, and the track groove is connected to the sliding groove. The connecting rod passes through the track groove and is connected to the abutment member. One end of the connecting rod away from the abutment member is connected to one end of the elastic member, and the other opposite end of the elastic member is connected to the base.

3. The stamping die according to claim 2, wherein: Along the mold closing direction of the upper mold and the lower mold, the distance between the other opposite end of the elastic member and the lower mold plate is greater than the distance between one end of the elastic member and the lower mold plate.

4. The stamping die according to claim 1, wherein: A concave arc surface is provided on one side of the groove wall facing the bearing seat.

5. The stamping die according to claim 1, wherein: One end of the abutment piece that is in contact with the end of the composite material is provided with a step portion, and the step portion is used for supporting and contacting the end of the composite material.

6. The stamping die according to claim 1, wherein: One end of the supporting seat that supports the composite material is provided with two positioning parts that are spaced apart from each other. The composite material is accommodated between the two positioning parts to position the composite material.

7. The stamping die according to claim 1, wherein: One end of the bearing seat that bears the composite material is provided with a protruding portion, which protrudes toward the base. An accommodating space for accommodating part of the base and part of the abutment member is formed between the protruding portion and the lower template.

8. The stamping die according to claim 7, wherein: An outwardly convex arc surface is provided on one end of the protruding portion facing the base.

9. The stamping die according to claim 1, wherein: The upper mold also includes a pressing plate, which is arranged on the side of the upper mold plate facing the lower mold. An avoidance groove is provided on the side of the pressing plate facing the lower mold. The pressing plate is also provided with a punching hole, which is adjacent to and communicated with the avoidance groove. The punching hole is arranged corresponding to the punch. When the upper mold and the lower mold are closed, the pressing plate presses the composite material onto the bearing seat. When the pressing plate presses the composite material, the pressing plate extends into the avoidance groove based on the base, and the punch punches the composite material through the punching hole.

10. The stamping die according to claim 1, wherein: The lower mold also includes a ejection assembly, which includes an ejection drive and an ejection member. The ejection drive is arranged below the lower mold plate. The ejection member is connected to the ejection drive and moves through the lower mold plate and the supporting seat to eject the stamped composite material from the supporting seat under the drive of the ejection drive.

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