Punch forming die and method

Abstract

The invention relates to the technical field of automobile part production, in particular to a punch forming die and method.The punch forming die comprises a die base, a forming template, a clamping mechanism and a die jacking mechanism; the two forming templates are positioned between the two die holders and are in one-to-one correspondence; the two forming templates are movably clamped with the corresponding die holders through clamping mechanisms respectively; the two forming templates are respectively provided with a male die and a forming cavity, and the die holder can drive the forming templates to move, so that the male die is buckled in the forming cavity; the top mold mechanism is arranged in a forming template provided with a forming cavity; when the male die is buckled in the forming cavity, the end face of the top die end and the cavity wall of the forming cavity are coplanar. And when the male die is far away from the forming cavity, the top die end penetrates into the forming cavity. During mold closing, normal punch forming is prevented from being affected, meanwhile, the updating and maintaining cost and the probability that the surface of a formed part is scratched and deformed during demolding are reduced, and the overall utilization rate and the demolding convenience are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of automotive parts production, and particularly relates to a stamping die and method. Background Art

[0002] A stamping die uses a punching press and a die to stamp a metal sheet, causing plastic deformation to obtain a formed part with the required shape, and is often used in the production process of automotive parts.

[0003] The existing stamping die mainly includes two parts: a bottom die seat and a pressing die seat. Among them, a forming cavity is provided on the bottom die seat, and a forming pressing block is provided on the pressing die seat. The metal sheet is formed by the closing of the forming pressing block and the forming cavity. However, after the above stamping die is used multiple times, a large amount of dirt and impurities are extremely likely to accumulate on the surface areas of the forming cavity and the forming pressing block, or the structures of the forming cavity and the forming pressing block are deformed due to the stamping during the closing of the die, and scratches are generated on their surfaces, thus greatly affecting the output quality of the formed part. At this time, the stamping die can no longer be used, and only the whole stamping die can be replaced, resulting in too high maintenance costs. Moreover, some formed parts with special shapes required usually have large curved surfaces and complex structures. After stamping, they are extremely likely to get stuck in the forming cavity, making the demoulding difficult and hard to smoothly take out. Even if taken out, it is extremely likely to cause scratches and deformation on the surface of the formed part. Summary of the Invention

[0004] In view of the above problems, the present invention provides a stamping die, including:

[0005] Die seats and forming templates, two of each are provided. The two forming templates are located between the two die seats and are arranged in one-to-one correspondence with the two die seats;

[0006] Clamping mechanisms, two of which are provided. The two forming templates are respectively movably clamped to the corresponding die seats through the clamping mechanisms;

[0007] Convex dies and forming cavities are respectively provided on the two forming templates, and at least one die seat can drive the corresponding forming template to move, so that the convex die is buckled in the forming cavity to stamp a formed part;

[0008] A top die mechanism is arranged in the forming template provided with the forming cavity, and a top die end is provided on the top die mechanism;

[0009] When the convex die is buckled in the forming cavity, the end surface of the top die end is coplanar with the cavity wall of the forming cavity;

[0010] When the convex die moves away from the forming cavity, the top die end penetrates into the forming cavity.

[0011] In some of the specific embodiments, accommodation cavities are formed in both of the two die bases;

[0012] The clamping mechanism includes:

[0013] A first engaging component, which is arranged on one side of the forming template close to the corresponding accommodation cavity;

[0014] A second engaging component, which is arranged in the accommodation cavity, and the engaging side of the second engaging component is movably arranged;

[0015] The engaging side of the second engaging component can move along the length direction of the accommodation cavity until it is clamped with the engaging side of the first engaging component;

[0016] The engaging side of the second engaging component can move reversely along the length direction of the accommodation cavity until it is disengaged from the engaging side of the first engaging component.

[0017] In some of the specific embodiments, the first engaging component includes:

[0018] A first locking block, which is arranged on one side of the forming template close to the corresponding accommodation cavity, and a first wedge-shaped structure is arranged on the side of the first locking block away from the forming template to form the engaging side of the first engaging component;

[0019] The second engaging component includes:

[0020] A lead screw, which is rotatably arranged in the accommodation cavity along the length direction of the accommodation cavity;

[0021] A second locking block, which is slidably arranged in the accommodation cavity along the length direction of the accommodation cavity and is rotatably connected to the lead screw, and a second wedge-shaped structure is arranged on the side of the second locking block close to the forming template facing the first wedge-shaped structure to form the engaging side of the second engaging component;

[0022] The size of the first wedge-shaped structure is adapted to the size of the second wedge-shaped structure.

[0023] In some of the specific embodiments, both the first locking block and the second locking block are two;

[0024] The two first locking blocks and the two second locking blocks are arranged in one-to-one correspondence.

[0025] In some of the specific embodiments, the second engaging component further includes:

[0026] A middle support block, which is fixedly arranged in the accommodation cavity, and the lead screw rotatably penetrates through the middle support block;

[0027] When the first wedge-shaped structure is clamped with the second wedge-shaped structure, the middle support block is supported on the forming template.

[0028] In some specific embodiments, a plurality of reset holes are formed on both sides inside the forming template provided with the forming cavity, and the openings of the reset holes face the forming template provided with the punch;

[0029] A demolding cavity is formed adjacent to the forming cavity inside the forming template provided with the forming cavity, and a plurality of the reset holes communicate with the demolding cavity;

[0030] The top die mechanism includes:

[0031] A plurality of springs are provided, and the plurality of springs are respectively arranged in the plurality of reset holes;

[0032] A demolding plate is arranged in the demolding cavity, and the demolding plate is connected to the plurality of springs;

[0033] A plurality of demolding rods are provided, and the plurality of demolding rods are evenly arranged on one side of the demolding plate close to the forming cavity, and one end of the demolding rod far from the demolding plate slides through a through hole into the forming cavity to form the top die end of the top die mechanism.

[0034] In some specific embodiments, a guide rod is arranged at one end of the spring close to the forming template provided with the punch, and the guide rod slides through the opening of the reset hole to the outside of the reset hole;

[0035] A plurality of stamping guide grooves are formed on the forming template provided with the punch, and the plurality of stamping guide grooves are arranged in one-to-one correspondence with the plurality of guide rods.

[0036] In some specific embodiments, an embedding groove is formed around the circumference of the through hole at one end of the through hole close to the forming cavity;

[0037] One end of the demolding rod passing through the through hole into the forming cavity is provided with a top module, and the size of the top module is adapted to the size of the embedding groove.

[0038] In some specific embodiments, a limiting ring is arranged around the circumference of the outer periphery of one end of the guide rod passing through the outside of the reset hole.

[0039] A stamping forming method based on the same concept, using the stamping forming die as described in any one of the above specific embodiments, includes the following steps:

[0040] The two forming templates are respectively clamped and installed on the two die bases through two clamping mechanisms;

[0041] Drive the die holder to drive the forming template provided with the forming groove close to the forming template provided with the punch. When the punch is engaged in the forming cavity, the end face of the ejector end of the ejector mechanism is coplanar with the cavity wall of the forming cavity to complete the stamping of the formed part.

[0042] After the stamping is completed, drive the die holder to drive the forming template provided with the forming groove away from the forming template provided with the punch. When the punch moves away from the forming cavity, the ejector end of the ejector mechanism penetrates into the forming cavity to eject the formed part, so that the formed part is separated from the forming cavity.

[0043] Compared with the prior art, the stamping and forming die of the present invention has at least the following advantages: By adding a clamping mechanism, the forming template and the die holder are movably clamped. When problems such as deformation, dirt, scratches or damage occur to the punch or the forming cavity, it is only necessary to release the connection of the clamping mechanism to realize the quick disassembly of the forming template and the die holder, and replace the corresponding forming template for the specific problem part, while the forming template without problems can still be used continuously, thereby reducing the renewal and maintenance cost and improving the overall utilization rate. And, by adding an ejector mechanism on the forming template provided with the forming cavity, when the mold is separated, the ejector end of the ejector mechanism can be driven to penetrate into the forming cavity, so as to eject the formed part in the forming cavity, improving the convenience during demolding and reducing the probability of surface scratches and deformation of the formed part. At the same time, when the mold is closed, the end face of the ejector end of the ejector mechanism can be coplanar with the cavity wall of the forming cavity, so as to avoid affecting the normal stamping and forming.

[0044] The stamping and forming method of the present invention, because it uses the stamping and forming die as described above, has the same beneficial effects as the stamping and forming die described above. Therefore, it will not be repeated here.

[0045] Other features and advantages of the present invention will be described in the following description of the specification, and some of them will become obvious from the description of the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures pointed out in the specification and the drawings. Description of the Drawings

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0047] Figure 1 Shows a schematic diagram of the stamping and forming die in the embodiment of the present invention;

[0048] Figure 2Shows a split cross-sectional view of a forming template and a die holder provided with a punch in an embodiment of the present invention;

[0049] Figure 3 Shows a cross-sectional view of a forming template provided with a punch in an embodiment of the present invention;

[0050] Figure 4 Shows a schematic diagram of a second engaging component in an embodiment of the present invention;

[0051] Figure 5 Shows a schematic diagram of a forming template provided with a forming cavity in an embodiment of the present invention;

[0052] Figure 6 Shows a schematic diagram of a top die mechanism in an embodiment of the present invention;

[0053] Figure 7 Is Figure 5 An enlarged schematic diagram of A of ;

[0054] Figure 8 Shows a flowchart of a stamping forming method in an embodiment of the present invention.

[0055] In the figure, 100, forming template; 110, spacer block; 120, guide post; 130, stamping guide groove; 200, die holder; 210, slide rail; 220, clamping platform; 230, assembly guide groove; 300, clamping mechanism; 310, first engaging component; 311, first locking block; 312, first wedge structure; 320, second engaging component; 321, lead screw; 322, second locking block; 323, second wedge structure; 324, middle support block; 325, rotating handle; 400, top die mechanism; 410, spring; 420, stripping plate; 430, stripping rod; 431, top module; 440, guide rod; 441, limiting ring; 450, slide bar. Detailed implementation manners

[0056] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0057] Refer to Figure 1 And Figure 2, an embodiment of the present invention provides a stamping die, comprising: a die base 200, a forming template 100, a clamping mechanism 300 and a top die mechanism 400. There are two die bases 200 and two forming templates 100 respectively. The two forming templates 100 are located between the two die bases 200 and are arranged in one-to-one correspondence with the two die bases 200. There are two clamping mechanisms 300. The two forming templates 100 are respectively movably clamped to the corresponding die bases 200 through the clamping mechanisms 300. A punch and a forming cavity are respectively arranged on the two forming templates 100, and at least one die base 200 can drive the corresponding forming template 100 to move so that the punch is buckled in the forming cavity to stamp a formed part. The top die mechanism 400 is arranged in the forming template 100 provided with the forming cavity, and a top die end is arranged on the top die mechanism 400. When the punch is buckled in the forming cavity, the end face of the top die end is coplanar with the cavity wall of the forming cavity. When the punch moves away from the forming cavity, the top die end penetrates into the forming cavity.

[0058] Specifically, referring to Figure 1 , the two die bases 200 are arranged up and down relatively. The two forming templates 100 are located between the two die bases 200, and the two forming templates 100 are connected to the two die bases 200 in one-to-one correspondence. By adjusting the relative position between the two die bases 200, the two forming templates 100 can be vertically aligned with each other. Moreover, by moving any one of the die bases 200 to drive the corresponding forming template 100 to lift or lower, the opposite faces of the two forming templates 100 can be made to abut against each other. A punch and a forming cavity are respectively arranged on the opposite faces of the two forming templates 100. After the opposite faces of the two forming templates 100 abut against each other, the punch can be exactly buckled in the forming cavity, thereby realizing the stamping of the blank. Among them, referring to Figure 2, two clamping mechanisms 300 are respectively arranged between the two forming templates 100 and the corresponding die bases 200, so that each forming template 100 can be movably clamped to the corresponding die base 200 through the clamping mechanism 300. Thus, when deformation, dirt, scratches or damage occur to the punch or the forming cavity, by disconnecting the connection of the clamping mechanism 300 corresponding to the problematic forming template 100, the quick disassembly of the forming template 100 and the die base 200 can be realized, and the corresponding forming template 100 can be replaced for the specific problematic part, while the forming templates 100 without problems can still be used continuously, thereby reducing the update and maintenance costs and improving the overall utilization rate. For example, when deformation, dirt, scratches or damage occur to the punch, only the forming template provided with the punch needs to be replaced, while the forming template provided with the forming cavity without problems can still be used continuously. At the same time, a die ejecting mechanism 400 is also arranged in the forming template 100 provided with the forming cavity. A die ejecting end is arranged on the die ejecting mechanism 400, and the die ejecting end penetrates into the forming template 100. During the process that the two forming templates 100 approach each other until the opposite surfaces of the two forming templates 100 are in contact with each other, the die ejecting end of the die ejecting mechanism 400 can gradually move away from the cavity of the forming cavity until the end surface of the die ejecting end is coplanar with the cavity wall of the forming cavity, so as to avoid affecting the normal stamping forming during mold closing. When the two forming templates 100 move away from each other until the punch is separated from the forming cavity, the die ejecting end of the die ejecting mechanism 400 can penetrate into the cavity of the forming cavity again, so as to apply pressure to the formed part in the forming cavity and eject the formed part in the forming cavity from the forming cavity, realizing quick demolding, improving the convenience during demolding, and reducing the probability of surface scratches and deformation of the formed part.

[0059] Furthermore, there are multiple die ejecting ends arranged on the die ejecting mechanism 400, and the multiple die ejecting ends are evenly distributed along the shape and size of the forming cavity, so as to apply pressure to multiple points of the formed part evenly during demolding, thereby avoiding the single-point force application situation during traditional demolding, avoiding the problem of depression at the force application point of the formed part, and ensuring the quality of the formed part.

[0060] Furthermore, the forming template 100 provided with the punch is connected to the die base 200 located below, and the forming template 100 provided with the forming cavity is connected to the die base 200 located above, so that the forming cavity can be located above the punch. After demolding is completed, the formed part can fall off the punch, thus facilitating the removal of the formed part.

[0061] Further, the die holder 200 corresponding to the forming template 100 provided with the punch is fixedly arranged, and the die holder 200 corresponding to the forming template 100 provided with the forming cavity is arranged to be liftable. Thus, after the sheet material is placed on the punch, by driving the die holder 200 located above, the forming template 100 provided with the forming cavity can be driven to continuously approach the forming template 100 provided with the punch located below, so that the punch and the forming cavity are mutually engaged to complete the stamping forming of the sheet material. This structure is easy to set up and convenient to operate.

[0062] In some specific embodiments of the present invention, referring to Figure 2 , accommodation cavities are formed in both die holders 200. The clamping mechanism 300 includes: a first clamping component 310 and a second clamping component 320. The first clamping component 310 is arranged on one side of the forming template 100 close to the corresponding accommodation cavity. The second clamping component 320 is arranged in the accommodation cavity, and the clamping side of the second clamping component 320 is movably arranged. The clamping side of the second clamping component 320 can move along the length direction of the accommodation cavity until it is clamped with the clamping side of the first clamping component 310. The clamping side of the second clamping component 320 can move reversely along the length direction of the accommodation cavity until it is disengaged from the clamping side of the first clamping component 310.

[0063] Specifically, an accommodation cavity is formed in the die holder 200, and an opening is formed on one side of the die holder 200 close to the corresponding forming template 100. The forming template 100 covers the opening of the corresponding die holder 200. Among them, the first clamping component 310 is fixedly arranged on one side of the forming template 100 close to the corresponding accommodation cavity of the die holder 200. For example, the first clamping component 310 is fixedly arranged on the bottom surface of the forming template 100 provided with the punch, and the first clamping component 310 is fixedly arranged on the top surface of the forming template 100 provided with the forming cavity. The second clamping component 320 is arranged in the accommodation cavity, the clamping side of the second clamping component 320 and the clamping component of the first clamping component 310 are mutually adapted, and the clamping side of the second clamping component 320 can move along the length direction of the accommodation cavity in the direction of approaching or departing from the clamping side of the first clamping component 310. When the second clamping component 320 continuously moves along the length direction of the accommodation cavity in the direction of approaching the first clamping component 310, finally, the clamping side of the first clamping component 310 can be clamped with the clamping side of the second clamping component 320, thereby realizing the movable clamping of the forming template 100 and the die holder 200. When the second clamping component 320 continuously moves along the length direction of the accommodation cavity in the direction of departing from the first clamping component 310, finally, the clamping side of the first clamping component 310 can be disengaged from the clamping side of the second clamping component 320, thereby realizing the detachment of the forming template 100 and the die holder 200 and completing the disassembly between the forming template 100 and the die holder 200.

[0064] Furthermore, a clamping platform 220 is provided around the opening of the accommodation cavity. A cushion block 110 is disposed around the side of the forming template 100 close to the corresponding mold base 200. The sizes of the cushion block 110 and the clamping platform 220 are mutually adapted. After the forming template 100 is covered on the opening of the corresponding mold base 200, the cushion block 110 can be embedded into the clamping platform 220, so as to realize the lateral fixation between the forming template 100 and the mold base 200, thereby ensuring the clamping accuracy between the first clamping assembly 310 and the second clamping assembly 320.

[0065] Furthermore, a plurality of assembly guiding grooves 230 are formed on the side of the mold base 200 close to the corresponding forming template 100, and a plurality of guiding columns 120 are disposed on the side of the forming template 100 close to the corresponding mold base 200. The plurality of guiding columns 120 and the plurality of assembly guiding grooves 230 are arranged in one-to-one correspondence. After the forming template 100 is covered on the opening of the corresponding mold base 200, the guiding columns 120 can be exactly and completely inserted into the corresponding assembly guiding grooves 230, so that during the process of covering the forming template 100 on the opening of the corresponding mold base 200, the installation accuracy can be ensured under the guidance of the guiding columns 120 and the assembly guiding grooves 230. Moreover, the lateral fixation between the forming template 100 and the mold base 200 can be further ensured by the guiding columns 120 and the assembly guiding grooves 230.

[0066] Furthermore, both the guiding columns 120 and the assembly guiding grooves 230 are in a conical shape, so that a conical surface adapted to each other is formed between the outer wall of the guiding column 120 and the inner wall of the assembly guiding groove 230, thereby facilitating the insertion of the guiding column 120 into the corresponding assembly guiding groove 230 when installing the forming template 100 and the mold base 200. Moreover, even if there is a certain offset between the forming template 100 and the mold base 200, the relative positions of the forming template 100 and the mold base 200 can be continuously corrected under the guidance of the conical surfaces of the guiding columns 120 and the assembly guiding grooves 230, ensuring the installation accuracy.

[0067] In some specific embodiments of the present invention, refer to Figure 3 and Figure 4, the first engaging component 310 includes: a first locking block 311. The first locking block 311 is disposed on one side of the forming template 100 close to the corresponding receiving cavity, and a first wedge-shaped structure 312 is provided on the side of the first locking block 311 away from the forming template 100 to form the engaging side of the first engaging component 310. The second engaging component 320 includes: a lead screw 321 and a second locking block 322. The lead screw 321 is rotatably disposed in the receiving cavity along the length direction of the receiving cavity. The second locking block 322 is slidably disposed in the receiving cavity along the length direction of the receiving cavity and is rotatably connected to the lead screw 321, and a second wedge-shaped structure 323 is provided on the side of the second locking block 322 close to the forming template 100 facing the first wedge-shaped structure 312 to form the engaging side of the second engaging component 320. The size of the first wedge-shaped structure 312 is adapted to the size of the second wedge-shaped structure 323.

[0068] Specifically, referring to Figure 3 , the first locking block 311 is disposed on one side of the forming template 100 close to the corresponding receiving cavity. The side of the first locking block 311 away from the forming template 100 extends toward the receiving cavity of the mold base 200, and a first wedge-shaped structure 312 is provided. The engaging side of the first engaging component 310 is formed by the first wedge-shaped structure 312. Referring to Figure 4 , the lead screw 321 is disposed in the receiving cavity, and both ends of the lead screw 321 extend along the length direction of the receiving cavity to both sides of the mold base 200 and are rotatably connected to the side walls of the mold base 200. The second locking block 322 is slidably disposed in the receiving cavity along the length direction of the receiving cavity and is rotationally connected to the lead screw 321 through a thread. When the lead screw 321 rotates, it can drive the second locking block 322 to move along the length direction of the receiving cavity toward or away from the first locking block 311. The side of the second locking block 322 away from the bottom of the receiving cavity extends toward the forming template 100, and a second wedge-shaped structure 323 is provided. The engaging side of the second engaging component 320 is formed by the second wedge-shaped structure 323. The first wedge-shaped structure 312 and the second wedge-shaped structure 323 are mutually adapted. After the second locking block 322 continuously moves along the length direction of the receiving cavity toward the first locking block 311, finally, the wedge surfaces between the first wedge-shaped structure 312 and the second wedge-shaped structure 323 can be mutually attached, so that the second wedge-shaped structure 323 hooks the first wedge-shaped structure 312 to complete the clamping. When the second locking block 322 continuously moves along the length direction of the receiving cavity away from the first locking block 311 again, finally, the wedge surfaces between the first wedge-shaped structure 312 and the second wedge-shaped structure 323 can be mutually separated, so that the second wedge-shaped structure 323 no longer hooks the first wedge-shaped structure 312 to complete the release of the clamping.

[0069] Further, slide rails 210 are respectively arranged on both sides of the accommodation cavity along the length direction of the accommodation cavity. The second locking block 322 is slidably connected to the slide rail 210 in a grooved manner, thereby completing the sliding arrangement of the second locking block 322 in the accommodation cavity. Moreover, the slide rail 210 can circumferentially limit the second locking block 322 on the lead screw 321, thereby preventing the lead screw 321 from driving the second locking block 322 to rotate together and ensuring the stability of the second locking block 322 during movement.

[0070] Further, one end of the lead screw 321 rotatably penetrates through the side wall of the mold base 200 to the outside and is provided with a rotary handle 325, thereby facilitating the control of the rotation of the lead screw 321.

[0071] In some specific embodiments of the present invention, referring to Figure 3 and Figure 4 , both the first locking block 311 and the second locking block 322 are two. The two first locking blocks 311 and the two second locking blocks 322 are arranged in one-to-one correspondence.

[0072] Specifically, both the first locking block 311 and the second locking block 322 are two. Referring to Figure 3 , the two first locking blocks 311 are symmetrically arranged on one side of the forming template 100 close to the corresponding accommodation cavity, and the two first wedge-shaped structures 312 face each other. Referring to Figure 4 , the two second locking blocks 322 are symmetrically arranged in the accommodation cavity between the two first locking blocks 311. The two second wedge-shaped structures 323 are respectively arranged facing the two first wedge-shaped structures 312, and the threaded connection directions of the two second locking blocks 322 with the lead screw 321 are opposite, that is, when the lead screw 321 rotates, it will drive the two second locking blocks 322 to move towards or away from each other. When the lead screw 321 rotates, it can drive the two second locking blocks 322 to move away from each other, so that the two second locking blocks 322 both move along the length direction of the accommodation cavity towards the direction close to the corresponding first locking block 311 until the wedge surfaces between the first wedge-shaped structure 312 and the corresponding second wedge-shaped structure 323 are mutually attached, thereby completing the clamping. When the lead screw 321 rotates in the reverse direction, it can drive the two second locking blocks 322 to move towards each other, so that the two second locking blocks 322 both move along the length direction of the accommodation cavity towards the direction away from the corresponding first locking block 311 until the wedge surfaces between the first wedge-shaped structure 312 and the corresponding second wedge-shaped structure 323 are mutually separated, thereby releasing the clamping.

[0073] Alternatively, two second locking blocks 322 are symmetrically arranged in the accommodation cavity, the two second wedge-shaped structures 323 face each other, and the threaded connection directions of the two second locking blocks 322 with the lead screw 321 are opposite. The two first locking blocks 311 are symmetrically arranged between the two second locking blocks 322 on one side of the forming die 100 close to the corresponding accommodation cavity, and the two first wedge-shaped structures 312 are respectively arranged facing the two second wedge-shaped structures 323. When the lead screw 321 rotates, it can drive the two second locking blocks 322 to move towards each other, so that the two second locking blocks 322 both move continuously along the length direction of the accommodation cavity towards the direction close to the corresponding first locking block 311 until the wedge surfaces of the first wedge-shaped structure 312 and the corresponding second wedge-shaped structure 323 are mutually attached, thus completing the clamping. When the lead screw 321 rotates in the reverse direction, it can drive the two second locking blocks 322 to move in the reverse direction, so that the two second locking blocks 322 both move continuously along the length direction of the accommodation cavity towards the direction away from the corresponding first locking block 311 until the wedge surfaces of the first wedge-shaped structure 312 and the corresponding second wedge-shaped structure 323 are mutually separated, thus releasing the clamping. By increasing the number of the first locking blocks 311 and the second locking blocks 322, the connection firmness can be improved.

[0074] Furthermore, the side of the second wedge-shaped structure 323 close to the forming die 100 is arranged close to the forming die 100. However, there is still a certain gap between the second wedge-shaped structure 323 and the forming die 100, so as to avoid the second wedge-shaped structure 323 rubbing against the forming die 100 and also to maximize the area of the wedge surface of the second wedge-shaped structure 323. The side of the first wedge-shaped structure 312 close to the accommodation cavity is arranged close to the lead screw 321. However, there is still a certain gap between the first wedge-shaped structure 312 and the lead screw 321, so as to avoid the first wedge-shaped structure 312 rubbing against the lead screw 321 and also to maximize the area of the wedge surface of the first wedge-shaped structure 312. The connection firmness is improved.

[0075] It should be noted that since the wedge surfaces of the first wedge-shaped structure 312 and the second wedge-shaped structure 323 are both inclined, during the process of the second locking block 322 continuously approaching the first locking block 311, the wedge surfaces of the first wedge-shaped structure 312 and the second wedge-shaped structure 323 will be continuously locked, in close contact and mutually extruded, so as to ensure stability during the subsequent mold closing process, improve the overall stability and structural strength after assembly, and reduce the probability of loosening and offset during the stamping process.

[0076] In some specific embodiments of the present invention, referring to Figure 2 , the second engaging assembly 320 further includes: a middle support block 324. The middle support block 324 is fixedly arranged in the accommodation cavity, and the lead screw 321 rotates and passes through the middle support block 324. When the first wedge-shaped structure 312 is clamped with the second wedge-shaped structure 323, the middle support block 324 supports the forming die 100.

[0077] Specifically, the middle support block 324 is fixedly arranged in the middle of the accommodating cavity. The lead screw 321 is rotatably arranged through the middle support block 324. When the lead screw 321 rotates, there is no corresponding threaded connection relationship between the lead screw 321 and the middle support block 324, thus ensuring the stability of the rotation of the lead screw 321. Moreover, when the first wedge-shaped structure 312 is clamped with the second wedge-shaped structure 323 and the forming template 100 and the mold base 200 are assembled, the side of the middle support block 324 close to the forming template 100 can be attached to the side of the forming template 100 close to the corresponding accommodating cavity, so as to support the forming template 100 through the middle support block 324, thereby reducing the influence of the pressure during stamping on the forming template 100 and improving the service life of the forming template 100.

[0078] In some specific embodiments of the present invention, referring to Figure 5 , a plurality of reset holes are symmetrically opened on both sides inside the forming template 100 provided with the forming cavity, and the openings of the reset holes face the forming template 100 provided with the punch. A demolding cavity is opened adjacent to the forming cavity inside the forming template 100 provided with the forming cavity, and a plurality of reset holes are all communicated with the demolding cavity. The top mold mechanism 400 includes: a spring 410, a demolding plate 420 and a demolding rod 430. A plurality of springs 410 are provided, and the plurality of springs 410 are respectively arranged in the plurality of reset holes. The demolding plate 420 is arranged in the demolding cavity, and the demolding plate 420 is connected to the plurality of springs 410. A plurality of demolding rods 430 are provided, and the plurality of demolding rods 430 are evenly arranged on the side of the demolding plate 420 close to the forming cavity, and the end of the demolding rod 430 away from the demolding plate 420 slides through the through hole into the forming cavity to form the top mold end of the top mold mechanism 400.

[0079] Specifically, a plurality of reset holes are vertically formed in the side of the molding template 100 provided with the molding cavity, and the openings of the reset holes face the molding template 100 provided with the punch. A demolding cavity is horizontally formed in the wall of the molding cavity adjacent to the molding cavity in the molding template 100 provided with the molding cavity, and the demolding cavity communicates with each reset hole. A plurality of springs 410 correspond to the plurality of reset holes one by one, and the springs 410 are arranged in the corresponding reset holes. The demolding plate 420 is arranged in the demolding cavity and is respectively connected to the springs 410 in each reset hole, and the thickness of the demolding plate 420 is smaller than the thickness of the demolding cavity, so that the demolding plate 420 can be driven to move up and down along the thickness direction of the demolding cavity by the compression and elongation of the springs 410. A plurality of demolding rods 430 are uniformly distributed along the shape and size of the molding cavity on the side of the demolding plate 420 close to the molding cavity. A plurality of through holes are formed between the molding cavity and the demolding cavity according to the arrangement positions of the demolding rods 430, and one end of the demolding rod 430 away from the demolding plate 420 slides through the through holes into the molding cavity, so as to form a plurality of demolding ends of the mold ejection mechanism 400. When the two molding templates 100 approach each other until the opposite surfaces of the two molding templates 100 are in contact with each other, the springs 410 will be continuously compressed, thereby driving the demolding plate 420 and the plurality of demolding rods 430 on the demolding plate 420 to continuously move away from the cavity of the molding cavity until the end surfaces of the plurality of demolding rods 430 are coplanar with the wall of the molding cavity, so as to avoid affecting the normal stamping molding during mold closing. When the two molding templates 100 move away from each other until the punch is separated from the molding cavity, the springs 410 reset and elongate, thereby driving the demolding plate 420 and the plurality of demolding rods 430 on the demolding plate 420 to continuously move towards the cavity of the molding cavity until one end of the plurality of demolding rods 430 away from the demolding plate 420 can re-enter the cavity of the molding cavity, so as to apply pressure to the molded part in the molding cavity and eject the molded part in the molding cavity from the molding cavity, realizing rapid demolding, improving the convenience during demolding, and reducing the probability of surface scratches and deformation of the molded part. Moreover, through the plurality of demolding rods 430, pressure can be evenly applied to multiple points of the molded part during demolding, so as to avoid the single-point stress situation during traditional demolding and the problem of depression at the stress point of the molded part, and ensure the quality of the molded part.

[0080] In some specific embodiments of the present invention, referring to Figure 6 , a guide rod 440 is arranged at one end of the spring 410 close to the molding template 100 provided with the punch, and the guide rod 440 slides through the opening of the reset hole to the outside of the reset hole. A plurality of stamping guide grooves 130 are formed in the molding template 100 provided with the punch, and the plurality of stamping guide grooves 130 are arranged corresponding to the plurality of guide rods 440 one by one.

[0081] Specifically, one end of the spring 410 is connected to the bottom of the reset hole, and the other end extends towards the forming template 100 provided with the punch and is provided with a guide rod 440. The end of the guide rod 440 away from the spring 410 passes through the opening of the reset hole and extends towards the forming template 100 provided with the punch. On the side of the forming template 100 provided with the punch and close to the forming template 100 provided with the forming cavity, a plurality of stamping guide grooves 130 are provided. The plurality of stamping guide grooves 130 are arranged in one-to-one correspondence with the plurality of guide rods 440. When the two forming templates 100 approach each other until the opposite surfaces of the two forming templates 100 are in contact with each other, the end of the guide rod 440 extending outside the reset hole can be exactly and completely inserted into the corresponding stamping guide groove 130, so that during the process of the two forming templates 100 approaching each other until the opposite surfaces of the two forming templates 100 are in contact with each other, through the guidance of the guide rod 440 and the stamping guide groove 130, the accuracy of stamping can be ensured. When stamping starts, the two forming templates 100 approach each other, and the guide rod 440 will first insert into the opening of the stamping guide groove 130. As the two forming templates 100 continue to approach, the guide rod 440 continues to insert into the stamping guide groove 130. The guide rod 440 will exert a reaction force on the spring 410, thereby driving the spring 410 to compress, and then driving the stripping plate 420 and the plurality of stripping rods 430 on the stripping plate 420 away from the forming cavity. After stamping is completed, the two forming templates 100 move away from each other. As the two forming templates 100 continue to move away, the guide rod 440 will gradually withdraw from the stamping guide groove 130, thereby reducing the reaction force exerted by the guide rod 440 on the spring 410, and then enabling the spring 410 to reset and elongate, and then driving the stripping plate 420 and the plurality of stripping rods 430 on the stripping plate 420 to approach the forming cavity.

[0082] Further, one end of the guide rod 440 close to the stamping guide groove 130 and the stamping guide groove 130 are both conical in shape, so that the outer wall of the end of the guide rod 440 close to the stamping guide groove 130 and the inner wall of the stamping guide groove 130 form mutually adapted conical surfaces, thereby facilitating the insertion of the guide rod 440 into the corresponding stamping guide groove 130 during stamping, and even if there is a certain offset between the two forming templates 100, the relative positions of the two forming templates 100 can be continuously corrected under the guidance of the conical surfaces of the guide rod 440 and the stamping guide groove 130, ensuring the accuracy of stamping.

[0083] Further, a sliding rod 450 is arranged between the guide rod 440 and the spring 410. The sliding rod 450 is slidably connected to the reset hole, thereby ensuring the smoothness when the spring 410 compresses or elongates. Moreover, the spring 410 is connected to the stripping plate 420 through the sliding rod 450, which is convenient for connection and ensures the connection stability.

[0084] In some specific embodiments of the present invention, refer toFigure 7 One end of the through hole close to the forming cavity is provided with an embedding groove around the circumferential direction of the through hole. One end of the demolding rod 430 passing through to the inside of the forming cavity is provided with a top module 431, and the size of the top module 431 is adapted to the size of the embedding groove.

[0085] Specifically, the embedding groove is arranged around the circumferential direction of the through hole at one end of the through hole close to the forming cavity. One end of the demolding rod 430 passing through to the inside of the forming cavity is provided with a top module 431, and the size of the top module 431 is adapted to the size of the embedding groove, and the side of the top module 431 away from the demolding rod 430 is arranged along the trend of the cavity wall of the forming cavity. When the mold is closed, it can drive the top mold rod to move in the direction away from the cavity of the forming cavity until the top module 431 is exactly embedded in the embedding groove. At this time, the side of the top module 431 away from the demolding rod 430 is coplanar with the cavity wall of the forming cavity, so as to avoid affecting the normal stamping forming and ensure the quality of the formed part. When the mold is opened, it can drive the top mold rod to drive the top module 431 to move in the direction close to the cavity of the forming cavity until the top module 431 completely disengages from the embedding groove. During this process, the formed part can be gradually pushed out of the forming cavity through the top module 431, so as to complete the demolding. Moreover, through the arrangement of the top module 431, the contact area with the formed part can be enlarged, so as to further ensure the uniform force of the formed part and further avoid the problem of depression at the force application point of the formed part, and ensure the quality of the formed part.

[0086] In some specific embodiments of the present invention, referring to Figure 6 , a limiting ring 441 is horizontally arranged around the circumferential direction of the outer periphery of one end of the guide rod 440 passing through to the outside of the reset hole. As the two forming templates 100 continue to approach, the guide rod 440 continues to insert into the stamping guide groove 130, and the reaction force exerted by the guide rod 440 on the spring 410 will continuously increase, so as to drive the spring 410 to continuously compress until the limiting ring 441 abuts against the outer wall of the opening of the reset hole, the reaction force exerted by the guide rod 440 on the spring 410 is fixed, and the spring 410 will stop further compressing and maintain the existing compressed state. The limiting ring 441 can prevent the force on the spring 410 from exceeding the limit, thereby protecting the spring 410, so that when the reaction force exerted by the guide rod 440 on the spring 410 decreases, the spring 410 can be normally reset.

[0087] Referring to Figure 8, an embodiment of the present invention further provides a stamping forming method, which uses the stamping forming die described in any of the above specific embodiments, and includes the following steps: respectively clamp and install two forming templates 100 on two die bases 200 through two clamping mechanisms 300. Drive the die base 200 to drive the forming template 100 provided with a forming groove to approach the forming template 100 provided with a punch. When the punch is buckled into the forming cavity, the end surface of the top die end of the top die mechanism 400 is coplanar with the cavity wall of the forming cavity, and the stamping of the formed part is completed. After the stamping is completed, drive the die base 200 to drive the forming template 100 provided with a forming groove to move away from the forming template 100 provided with a punch. When the punch moves away from the forming cavity, the top die end of the top die mechanism 400 penetrates into the forming cavity to push the formed part, so that the formed part is separated from the forming cavity. By adding a clamping mechanism 300 in the adopted stamping forming die to enable the forming template 100 and the die base 200 to be movably clamped, when problems such as deformation, dirt, scratches or damage occur to the punch or the forming cavity, by disconnecting the connection of the clamping mechanism 300 corresponding to the forming template 100 with problems, the rapid disassembly of the forming template 100 and the die base 200 can be realized, and the corresponding forming template 100 can be replaced for the specific problem part, while the forming template 100 without problems can still be used continuously, thereby reducing the update and maintenance cost and improving the overall utilization rate. Moreover, by adding a top die mechanism 400 on the forming template 100 provided with a forming cavity, not only can the normal stamping forming be avoided during mold closing, but also during mold opening, the ejector rod 430 can be driven to drive the top die block 431 to penetrate into the forming cavity, so as to eject the formed part in the forming cavity, realize rapid demolding, improve the convenience during demolding, and reduce the probability of surface scratches and deformation of the formed part.

[0088] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stamping die, characterized in that: include: The mold base (200) and the molding template (100) are respectively provided with two, and the two molding templates (100) are located between the two mold bases (200) and are arranged in a one-to-one correspondence with the two mold bases (200); Two clamping mechanisms (300) are provided, and the two molding templates (100) are respectively movably clamped with the corresponding mold bases (200) through the clamping mechanisms (300); The two molding templates (100) are respectively provided with a convex mold and a molding cavity, and at least one of the mold bases (200) can drive the corresponding molding template (100) to move so that the convex mold is buckled in the molding cavity to stamp a molded part; A top mold mechanism (400) is arranged in the molding template (100) provided with a molding cavity, and a top mold end is arranged on the top mold mechanism (400); When the male mold is buckled in the molding cavity, the end surface of the top mold end is coplanar with the cavity wall of the molding cavity; When the male mold is away from the molding cavity, the top mold end is inserted into the molding cavity.

2. The stamping die according to claim 1, characterized in that: Both mold bases (200) are provided with a receiving cavity; The clamping mechanism (300) comprises: A first engaging assembly (310) is arranged on a side of the molding template (100) close to the corresponding accommodating cavity; A second engaging component (320) is disposed in the accommodating cavity, and a engaging side of the second engaging component (320) is movably disposed; The engaging side of the second engaging component (320) can move along the length direction of the accommodating cavity until it engages with the engaging side of the first engaging component (310); The engaging side of the second engaging component (320) can move in the opposite direction along the length direction of the accommodating cavity until it is disengaged from the engaging side of the first engaging component (310).

3. The stamping die according to claim 2, characterized in that: The first engaging assembly (310) comprises: A first locking block (311) is arranged on a side of the molding template (100) close to the corresponding accommodating cavity, and a first wedge-shaped structure (312) is arranged on a side of the first locking block (311) away from the molding template (100) to form a locking side of the first locking component (310); The second engaging assembly (320) comprises: A lead screw (321) is rotatably disposed in the accommodating cavity along the length direction of the accommodating cavity; A second locking block (322) is slidably disposed in the accommodating cavity along the length direction of the accommodating cavity and is rotatably connected to the lead screw (321), and a second wedge-shaped structure (323) is disposed on a side of the second locking block (322) close to the molding template (100) and facing the first wedge-shaped structure (312) to form a locking side of the second locking assembly (320); The size of the first wedge-shaped structure (312) is matched with the size of the second wedge-shaped structure (323).

4. The stamping die according to claim 3, characterized in that: There are two of each of the first locking block (311) and the second locking block (322); The two first locking blocks (311) and the two second locking blocks (322) are arranged in a one-to-one correspondence.

5. The stamping die according to claim 3, characterized in that: The second engaging assembly (320) further comprises: A middle support block (324) is fixedly disposed in the accommodating cavity, and the lead screw (321) is rotatably disposed through the middle support block (324); When the first wedge-shaped structure (312) and the second wedge-shaped structure (323) are engaged with each other, the middle support block (324) is supported on the forming template (100).

6. The stamping die according to claim 1, characterized in that: A plurality of reset holes are provided on both sides of the molding template (100) provided with the molding cavity, and the openings of the reset holes face the molding template (100) provided with the convex mold; The molding template (100) provided with a molding cavity has a demoulding cavity provided in it adjacent to the molding cavity, and the plurality of reset holes are all connected to the demoulding cavity; The top mold mechanism (400) comprises: A plurality of springs (410) are provided, and the plurality of springs (410) are respectively provided in the plurality of reset holes; A stripping plate (420) is disposed in the stripping cavity, and the stripping plate (420) is connected to the plurality of springs (410); A plurality of demoulding rods (430) are provided, and the plurality of demoulding rods (430) are evenly arranged on a side of the demoulding plate (420) close to the molding cavity, and one end of the demoulding rod (430) away from the demoulding plate (420) is slidably penetrated into the molding cavity through a through hole to form a top mold end of the top mold mechanism (400).

7. The stamping die according to claim 6, characterized in that: A guide rod (440) is provided at one end of the spring (410) close to the molding template (100) provided with the convex mold, and the guide rod (440) is slidably penetrated through the opening of the reset hole to the outside of the reset hole; The forming template (100) provided with a convex mold is provided with a plurality of punching guide grooves (130), and the plurality of punching guide grooves (130) are arranged in a one-to-one correspondence with the plurality of guide rods (440).

8. The stamping die according to claim 6, characterized in that: An embedding groove is provided around the circumference of the through hole at one end of the through hole close to the molding cavity; One end of the demoulding rod (430) that passes through the molding cavity is provided with a top module (431), and the size of the top module (431) is adapted to the size of the embedding groove.

9. The stamping die according to claim 7, characterized in that: A limiting ring (441) is provided on the outer periphery of one end of the guide rod (440) that passes through the outside of the reset hole and surrounds the guide rod (440) in the circumferential direction.

10. A stamping method, using the stamping die according to any one of claims 1 to 9, characterized in that: The following steps are involved: The two molding templates (100) are respectively clamped and installed on the two mold bases (200) through two clamping mechanisms (300); The die base (200) is driven to drive the forming template (100) provided with the forming groove to approach the forming template (100) provided with the convex die, and when the convex die is buckled in the forming cavity, the end surface of the top die end of the top die mechanism (400) is coplanar with the cavity wall of the forming cavity, thereby completing the stamping of the formed part; After the stamping is completed, the die base (200) is driven to drive the forming template (100) provided with the forming groove to move away from the forming template (100) provided with the convex die. When the convex die moves away from the forming cavity, the top die end of the ejection die mechanism (400) penetrates into the forming cavity to eject the formed part, so that the formed part is separated from the forming cavity.

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