Die

Abstract

The invention provides a die which comprises an upper die assembly, a lower die assembly and a lower die assembly. The lower die assembly is opposite to the upper die assembly, a containing cavity used for containing a product is formed in the lower die assembly, and the upper die assembly is movably arranged in the direction close to or away from the lower die assembly so that the material pressing part can press the product or be away from the product; and the positioning assembly is arranged on the lower die assembly, and at least part of the positioning assembly is movably arranged in the vertical direction so as to be inserted into a positioning hole of a product to position the product or avoid the product. The problem that in the prior art, the product in the mold is low in positioning precision, and consequently the product is prone to being scrapped is solved.

Description

Technical Field

[0001] The invention relates to the technical field of stamping dies, and in particular to a die. Background Art

[0002] Fuel cells, especially hydrogen fuel cells, are mainly used in fuel cell powered cars, buses, trucks, fuel cell powered locomotives, fuel cell powered vehicles, aircraft, and household distributed power sources in the new energy vehicle series. Its main structure is composed of a stack of multiple single components (single cells) with membrane electrode assemblies clamped by bipolar plates. The bipolar plate is the core component of the fuel cell stack, also known as the "skeleton" of the stack. It has the functions of distributing reaction gases, supporting membrane electrodes, and collecting and guiding water generated after gas reactions. According to the different substrate materials, bipolar plates can be divided into graphite bipolar plates, metal bipolar plates, and composite bipolar plates. As for metal bipolar plates, they have the advantages of excellent mechanical strength, high conductivity, good air tightness, easy manufacturing and molding. The metal bipolar plate is composed of a cathode plate and an anode plate by welding. If there is a misalignment between the flow channel and the pores of the cathode plate or the anode plate during the molding process, or the flow channel itself, when the bipolar plate is welded and assembled into a fuel cell, it will affect the flow of gas and water on the surface of the metal plate. Cause the fuel cell performance to decrease or there will be safety hazards. At the same time, since there is a membrane electrode between the two metal bipolar plates, in order to increase the contact area between the two bipolar plates and the membrane electrode, higher molding requirements are put forward for the cross-sectional shape of the metal plate flow channel. Therefore, improving the positioning accuracy of the metal plate during the molding process is a necessary requirement to ensure the quality of the metal bipolar plate.

[0003] Currently, the positioning forms for metal bipolar plate forming include contour positioning, hole positioning, open feature positioning (including semicircular holes, U-shaped grooves, semi-square grooves), and combined positioning (contour positioning + hole positioning, contour positioning + open feature positioning, hole positioning + open feature positioning).

[0004] In order to facilitate the positioning of the bipolar plate in the prior art, a positioning fixture structure is adopted. The fixed base is equipped with a lifting drive mechanism and a positioning pin mounting plate installed at the driving end of the lifting drive mechanism. The space for installing the lifting drive mechanism in the positioning fixture is hollow and is supported only by support blocks around the fixed base. This structure cannot be applied to metal plate punching dies. A waste collection device is required at the lower part of the lower die base of the metal plate punching die, and a support structure is required under the die punching and trimming die to support the die when the press is closed.

[0005] However, since the metal bipolar plates use ultra-thin materials with a plate thickness of 0.07mm-0.12mm, and the metal plate flow channel shape is complex and the molding area is large, the metal plate product undergoes large deformation during the molding process. Therefore, when the molding process is placed in the punching and trimming process, the metal plate may not be completely placed in the positioning pin, resulting in reduced positioning accuracy of the bipolar plate, and misalignment between the punching and trimming and the concave and convex groove shape on the product, thereby causing the product to be scrapped. Summary of the invention

[0006] The main purpose of the present invention is to provide a mold to solve the problem in the prior art that the positioning accuracy of the product in the mold is low, resulting in the product being easily scrapped.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a mold is provided, including: an upper mold assembly, the upper mold assembly includes a pressing part; a lower mold assembly, opposite to the upper mold assembly, the lower mold assembly is provided with a placement cavity for accommodating a product, the upper mold assembly is movably arranged in a direction approaching or moving away from the lower mold assembly, so that the pressing part presses the product or moves away from the product; a positioning assembly, arranged on the lower mold assembly, at least a part of the positioning assembly is movably arranged in a vertical direction, so as to be inserted into a positioning hole of the product to position the product, or to avoid the product.

[0008] Furthermore, the positioning assembly includes: a positioning component, which is arranged on the lower mold assembly, the positioning component is movably arranged in the vertical direction, and at least a portion of the positioning component is inserted into the positioning hole; a driving component, which is arranged on the lower mold assembly and is drivingly connected to the positioning component, and the driving component has a telescopically arranged driving rod, and the driving rod is drivingly connected to the positioning component.

[0009] Furthermore, the positioning component has a guide portion at one end away from the driving component, the guide portion has a guide surface, and at least a part of the guide surface is a conical surface.

[0010] Further, the lower mold assembly includes a lower mold base and a lower mold plate that are connected to each other, a first installation cavity is arranged in the lower mold base, and a first through hole is arranged on the lower mold plate; the driving component is arranged in the first installation cavity, and at least part of the positioning component is passed through the first through hole; wherein, a stop protrusion is arranged on the positioning component, the stop protrusion protrudes relative to the surface of the positioning component, and the stop protrusion and the bottom surface of the lower mold plate stop each other to limit the positioning component.

[0011] Furthermore, there are multiple groups of positioning components, which are spaced apart on the lower mold component; wherein each group of positioning components includes a positioning component and a driving component, respectively, and the driving component is connected to the positioning component to drive the positioning component to move through the driving component, so that the positioning component positions the product.

[0012] Furthermore, the upper mold assembly includes a stripper plate, and the pressing portion includes: a plurality of first pressing pieces, the plurality of first pressing pieces are arranged at intervals on the stripper plate, and each first pressing piece protrudes from the stripper plate toward the direction close to the lower mold assembly.

[0013] Furthermore, the upper mold assembly includes a stripping plate, and the pressing part further includes: a second pressing piece, the second pressing piece is arranged opposite to the positioning assembly, and the second pressing piece is movably arranged along the vertical direction.

[0014] Furthermore, the upper mold assembly includes an upper clamping plate and a stripping plate that are connected to each other, the upper clamping plate is provided with a second mounting cavity, the stripping plate is provided with a second through hole that is opposite to and connected to the second mounting cavity, and the pressing part also includes: a second pressing piece, at least part of which is inserted into the second through hole; a first elastic piece, which is arranged in the second mounting cavity, and the two ends of the first elastic piece are respectively connected to the inner wall surface of the second mounting cavity and the second pressing piece, and the first elastic piece can be flexibly arranged to push the second pressing piece to fit the product through the elastic restoring force of the first elastic piece.

[0015] Furthermore, an avoidance channel is provided in the second pressing member, and the avoidance channel is opposite to the positioning component. At least a portion of the positioning component passes through the positioning hole and then enters into the avoidance channel to position the product.

[0016] Furthermore, the aperture of the second through hole is smaller than the inner diameter of the second mounting cavity, a first step structure is arranged between the second mounting cavity and the second through hole, a second step structure is arranged on the second pressing piece, and at least part of the second step structure is interlocked with the first step structure to limit the second pressing piece.

[0017] The technical solution of the present invention is applied, and the mold includes an upper mold component, a lower mold component and a positioning component, the upper mold component includes a pressing part; the lower mold component is opposite to the upper mold component, and a placement cavity for accommodating the product is provided on the lower mold component, and the upper mold component is movably arranged in a direction close to or away from the lower mold component, so that the pressing part presses the product or moves away from the product; the positioning component is arranged on the lower mold component, and at least part of the positioning component is movably arranged in a vertical direction, so as to be inserted into the positioning hole of the product to position the product, or avoid the product. In this way, under the mutual cooperation of the pressing part and the positioning component, before the product is punched, the deformed and bent part of the product is flattened, and the positioning component is in a position to avoid the product, so as to avoid the problem that the positioning component of the pressing part interferes with the product during the pressing process, resulting in damage to the product. After the product is flattened, the positioning hole on the product is opposite to the positioning component, and the positioning component moves until it extends into the positioning hole of the product, thereby positioning the product during the punching process, improving the positioning accuracy of the product and ensuring the quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 A schematic structural diagram of an embodiment of a mold according to the present invention is shown;

[0020] Figure 2 shows a front view of a mold according to the present invention;

[0021] Figure 3 Shown according to Figure 2 Sectional view of the middle AA plane;

[0022] Figure 4 Shown according to Figure 3 Enlarged view of part A;

[0023] Figure 5 Shown according to Figure 3 Enlarged view of part B;

[0024] Figure 6 A cross-sectional view showing one perspective of a mold according to the present invention;

[0025] Figure 7 A schematic diagram showing a first position of a positioning component in a mold according to the present invention is shown;

[0026] Figure 8 A schematic diagram of a second position of a positioning component in a mold according to the present invention is shown.

[0027] The above drawings include the following reference numerals:

[0028] 100, upper die assembly; 110, material pressing part; 120, stripper plate; 111, first material pressing member; 112, second material pressing member; 130, upper clamping plate; 131, second mounting cavity; 121, second through hole; 113, first elastic member; 1120, avoidance channel; 132, first step structure; 1121, second step structure; 141, first guide column; 142, second guide column; 122, stripper pad; 133, upper pad; 150, top plate; 160, second elastic member; 170, limit bolt;

[0029] 200, product; 300, lower die assembly; 310, lower die seat; 320, lower die plate; 311, first mounting cavity; 321, first through hole; 331, first guide cylinder; 332, second guide cylinder; 322, lower pad; 340, lower pad; 350, bottom plate;

[0030] 400, positioning assembly; 410, positioning component; 420, driving component; 411, guide part; 412, stop protrusion. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] As mentioned in the background technology, during the processing of metal plates, it is necessary to accurately position the metal plates to ensure product quality. In the prior art, positioning tooling is provided, including movable positioning pins and other structures, to position the product. However, the space for installing the lifting drive mechanism of the existing positioning tooling is hollow, and it is supported only by the support blocks around the fixed base, which cannot be applied to the metal plate punching mold. A waste collection device needs to be provided under the lower die seat of the metal plate punching mold, and a support structure needs to be provided under the punching and trimming die of the mold to support the mold when the press is closed. Since the metal splint will be warped and deformed during the stamping process, the metal plate may not be completely placed in the positioning pin when the forming process is placed in the punching and trimming process. When the mold is closed, the positioning pin will damage the product, resulting in product scrapping. Therefore, in order to solve the above-mentioned technical problems, the mold of the present application is provided with a pressing part 110 and a positioning assembly 400. The pressing part 110 can apply pressure to the product on the lower mold assembly 300. When the product 200 is warped and deformed, the pressing part 110 can press the product 200 to flatten the warped and deformed part. At the same time, at least part of the positioning assembly 400 is movably arranged in the vertical direction. In this way, even if the product 200 is warped, during the process of the pressing part 110 flattening the product 200, the positioning assembly 400 avoids the product 200 to prevent the positioning assembly 400 from extending and damaging the product 200. After the pressing part 110 has completed flattening, the positioning assembly 400 extends out and can be inserted into the positioning hole on the product 200, so as to position the product 200 during the punching process. This ensures the positioning accuracy of the product 200, thereby improving the qualified rate of the product 200.

[0033] Please refer to Figures 1 to 8The present application provides a mold, including: an upper mold assembly 100, the upper mold assembly 100 includes a pressing portion 110; a lower mold assembly 300, opposite to the upper mold assembly 100, and provided with a placement cavity for accommodating a product 200, the upper mold assembly 100 is movably arranged in a direction approaching or moving away from the lower mold assembly 300, so that the pressing portion 110 applies pressure to the product 200 or moves away from the product 200; a positioning assembly 400, arranged on the lower mold assembly 300, at least a portion of the positioning assembly 400 is movably arranged in a vertical direction, so as to be inserted into a positioning hole of the product 200 to position the product 200, or to avoid the product 200.

[0034] The mold provided according to the present application includes an upper mold assembly 100, a lower mold assembly 300 and a positioning assembly 400. The upper mold assembly 100 includes a pressing portion 110; the lower mold assembly 300 is opposite to the upper mold assembly 100, and a placement cavity for accommodating the product 200 is provided on the lower mold assembly. The upper mold assembly 100 is movably arranged in a direction approaching or moving away from the lower mold assembly 300 so that the pressing portion 110 applies pressure to the product 200 or moves away from the product 200; the positioning assembly 400 is arranged on the lower mold assembly 300, and at least a portion of the positioning assembly 400 is movably arranged in a vertical direction so as to be inserted into the positioning hole of the product 200 to position the product 200, or to avoid the product 200. In this way, with the cooperation between the pressing part 110 and the positioning component 400, before punching the product 200, the deformed and bent part of the product 200 is flattened. At this time, the positioning component 400 is in a position to avoid the product 200, so as to avoid the pressing part 110 causing interference with the product 200 during the pressing process, thereby causing damage to the product 200. After the product 200 is flattened, the positioning hole on the product 200 is opposite to the positioning component 400, and the positioning component 400 moves until it extends into the positioning hole of the product 200, thereby positioning the product 200 during the punching process, thereby improving the positioning accuracy of the product 200 and ensuring the quality of the product 200.

[0035] Specifically, Figure 5 As shown, the positioning assembly 400 includes: a positioning component 410, which is arranged on the lower mold assembly 300, and the positioning component 410 is movably arranged in the vertical direction, and at least a part of the positioning component 410 is inserted into the positioning hole; a driving component 420, which is arranged on the lower mold assembly 300 and is drivingly connected to the positioning component 410, and the driving component 420 has a driving rod that is telescopically arranged, and the driving rod is drivingly connected to the positioning component 410. Preferably, the driving component 420 is a driving cylinder, which is used to drive the positioning component 410 to move in the vertical direction, and has a simple structure and strong structural stability.

[0036] The end of the positioning member 410 away from the driving member 420 has a guide portion 411, and the guide portion 411 has a guide surface, and at least part of the guide surface is a conical surface. This arrangement can guide the positioning member 410 during the process of inserting the positioning member 410 into the positioning hole, thereby improving the matching accuracy between the positioning member 410 and the positioning hole.

[0037] In the present application, a first buffer layer is also provided on the guide portion 411, and the first buffer layer is made of polyurethane material. The polyurethane material has high wear resistance and high elasticity, and can effectively reduce the friction between the positioning pin and the metal plate, thereby extending the life of the mold.

[0038] like Figure 5 and Figure 6 As shown, the lower mold assembly 300 includes a lower mold base 310 and a lower mold plate 320 that are connected to each other. A first mounting cavity 311 is provided in the lower mold base 310, and a first through hole 321 is provided on the lower mold plate 320. The driving component 420 is provided in the first mounting cavity 311, and at least part of the positioning component 410 is passed through the first through hole 321. The positioning component 410 is provided with a stopper protrusion 412, which protrudes relative to the surface of the positioning component 410, and the stopper protrusion 412 and the bottom surface of the lower mold plate 320 stop each other to limit the positioning component 410. In this way, when the driving component 420 drives the positioning component 410 to move upward, the stopper protrusion 412 and the lower mold plate 320 stop each other to limit the moving stroke of the positioning component 410, so as to prevent the positioning component 410 from extending too much and affecting the mold closing.

[0039] In the specific implementation process, there are multiple groups of positioning components 400, and multiple groups of positioning components 400 are arranged at intervals on the lower mold component 300; wherein each group of positioning components 400 includes a positioning component 410 and a driving component 420, and the driving component 420 is connected to the positioning component 410 to drive the positioning component 410 to move through the driving component 420, so that the positioning component 410 positions the product 200. Each driving component 420 in each group of positioning components 400 is independently controlled, so that each group of positioning components 400 and each positioning hole can be matched respectively. At the same time, multiple groups of positioning components 400 are used to provide multiple support points for the product 200, reducing the movement of the metal plate during the stamping process, which is suitable for stamping processes that require high positioning accuracy, such as precision stamping of fuel cell metal plates. The positioning components 400 with multiple support points make the position of the metal plate more stable during the stamping process, effectively reduce product size deviation, and improve the production consistency of fuel cell metal plates. It is suitable for precision stamping processes that require extremely high positioning accuracy.

[0040] The upper mold assembly 100 includes a stripper plate 120, and the pressing part 110 includes: a plurality of first pressing pieces 111, the plurality of first pressing pieces 111 are arranged at intervals on the stripper plate 120, and each first pressing piece 111 protrudes from the stripper plate 120 toward the direction close to the lower mold assembly 300. The pressing part 110 also includes: a second pressing piece 112, the second pressing piece 112 is arranged opposite to the positioning assembly 400, and the second pressing piece 112 is movably arranged in the vertical direction. Preferably, the vertical distance between the pressing end face of the first pressing piece 111 and the stripper plate 120 is 1 cm to 2 cm, so as to avoid excessive contact between the pressing pin and the lower mold part when the mold is closed, causing mold damage or excessive compression of the material. The second pressing piece 112 is arranged opposite to the positioning assembly 400, and the second pressing piece 112 is movably arranged in the vertical direction, so that the second pressing piece 112 can be used to flatten the body of the product 200 surrounding the positioning hole, so that the positioning assembly 400 can be smoothly inserted into the positioning hole. Among them, a third elastic member is arranged between each first pressing piece 111 and the stripping plate 120, and the third elastic member is preferably a spring, so that when each first pressing piece 111 contacts the product 200, the third elastic member is compressed, and under the action of the elastic restoring force of the third elastic member, the first pressing piece 111 is pushed to apply pressure to the product 200. Under the action of the third elastic member, the first pressing piece 111 can be fine-tuned along its axial direction. The fine-tuning function can adapt to the thickness changes of the metal plate and improve the versatility and production efficiency of the mold.

[0041] In the embodiment provided in the present application, the outer surface of each first pressing piece 111 is provided with a second buffer layer body, and the second buffer layer body is made of plastic or rubber material. Preferably, the second buffer layer body is silicone rubber. Silicone rubber has good elasticity and wear resistance, can effectively reduce the friction between the pressing pin and the metal plate, prevent the surface of the metal plate from being scratched, improve product quality, and is suitable for stamping processes that need to protect the surface of the metal plate, such as precision stamping of fuel cell metal plates. The use of silicone rubber effectively avoids scratches on the surface of the metal plate, improves the surface quality of the product, and is suitable for production environments with strict requirements on the surface quality of the product, such as high-end production lines for metal plates of fuel cells for new energy vehicles.

[0042] like Figure 5 and Figure 6As shown, the upper mold assembly 100 includes an upper clamping plate 130 and a stripping plate 120 which are connected to each other, the upper clamping plate 130 is provided with a second installation cavity 131, and the stripping plate 120 is provided with a second through hole 121 which is opposite to and connected to the second installation cavity 131, and the pressing part 110 also includes: a second pressing piece 112, at least part of the second pressing piece 112 is passed through the second through hole 121; a first elastic piece 113 is arranged in the second installation cavity 131, and the two ends of the first elastic piece 113 are respectively connected to the inner wall surface of the second installation cavity 131 and the second pressing piece 112, and the first elastic piece 113 can be elastically arranged to push the second pressing piece 112 to fit with the product 200 through the elastic restoring force of the first elastic piece 113. The area of ​​the pressing end surface of the second pressing piece 112 is larger than that of the first pressing piece 111. The first pressing piece 111 and the second pressing piece 112 cooperate with each other to apply pressure to the product 200, thereby improving the flattening effect of the product 200. Preferably, the first elastic piece 113 is a spring, and the elastic restoring force of the first elastic piece 113 is used to push the second pressing piece 112 to maintain a fitting state with the product 200.

[0043] In order to improve the matching accuracy between the second pressing piece 112 and the positioning assembly 400, an escape channel 1120 is provided in the second pressing piece 112. The escape channel 1120 is opposite to the positioning assembly 400. At least part of the positioning assembly 400 passes through the positioning hole and then enters the escape channel 1120 to position the product 200. Figure 7 As shown, the second pressing piece 112 flattens the body of the product 200 around the positioning hole and fixes the position of the positioning hole. The body of the product 200 surrounding the positioning hole is free from deformation and warping, which is conducive to the positioning component 400 being directly inserted into the positioning hole and then extending into the avoidance channel 1120. In this way, with the cooperation of the second pressing piece 112 and the positioning component 400, displacement of the product 200 during the punching process can be avoided.

[0044] In the specific implementation process, Figure 4 As shown, the aperture of the second through hole 121 is smaller than the inner diameter of the second installation cavity 131, a first step structure 132 is provided between the second installation cavity 131 and the second through hole 121, a second step structure 1121 is provided on the second pressing piece 112, and at least a portion of the second step structure 1121 is mutually engaged with the first step structure 132 to limit the position of the second pressing piece 112. In this way, after the second pressing piece 112 is extended, the first step structure 132 and the second step structure 1121 can be used to stop each other to limit the extension stroke of the second pressing piece 112.

[0045] In the present application, the upper mold assembly 100 also includes a first guide column 141 and a second guide column 142, the first guide column 141 is arranged on the top plate 150, and the second guide column 142 is arranged on the stripping plate 120, and the lower mold assembly 300 also includes a first guide cylinder 331 and a second guide cylinder 332, the first guide cylinder 331 is arranged on the lower mold base 310 and is opposite to the first guide column 141, and the second guide cylinder 332 is arranged on the lower mold plate 320 and is opposite to the second guide column 142. In the process of the upper mold assembly 100 gradually approaching the lower mold assembly 300, the first guide column 141 is gradually inserted into the first guide column 331, and the second guide column 142 is gradually inserted into the second guide column 332, thereby guiding the upper mold assembly 100.

[0046] The upper mold assembly 100 also includes a stripper pad 122 and an upper pad 133. The stripper pad 122 is arranged between the stripper plate 120 and the upper clamping plate 130. The stripper pad 122 is connected to the stripper plate 120. The upper pad 133 is arranged between the upper clamping plate 130 and the top plate 150. The upper pad 133 is connected to the upper clamping plate 130 and the top plate 150 through a limiting bolt 170. The limiting bolt 170 passes through the top plate 150, the upper pad 133 in sequence. , and the upper clamping plate 130, which is threadedly connected to the stripping pad 122, a third mounting cavity is provided on the upper clamping plate 130 and the upper pad 133, a second elastic member 160 is provided in the third mounting cavity, and both ends of the second elastic member 160 are respectively connected to the top plate 150 and the stripping pad 122, when the upper mold assembly 100 is in the initial position, under the action of the elastic restoring force of the second elastic member 160, a gap is maintained between the upper clamping plate 130 and the stripping pad 122.

[0047] The lower template is processed with through holes for installing the trimming and punching lower die inserts. There are also mounting holes for positioning blocks for rough positioning of the product, and mounting holes for positioning components for fine positioning. The four corners are processed with mounting holes for installing inner guide sleeves corresponding to the inner guide pillars of the upper die. The bottom surface of the lower pad 322 is installed with a cylinder for driving the positioning component to move up and down. All cylinders are connected in series through pipelines, and then connected to the production equipment with an air circuit control unit. A collection device for collecting trimming and punching waste is placed between the lower die base and the bottom plate 350. Among them, the bottom plate 350 and the lower die base 310 are connected by multiple lower pads 340 to ensure the support stability of the lower die assembly.

[0048] Before the press starts to move, the cylinder controls and drives the positioning component to move through the production equipment. The positioning component is in a jacking state, and the positioning component leaks out of the surface of the lower template 320. The product 200 produced in the previous process is placed in the positioning plate and positioning component of the upper template. When the mold is working, the upper slider of the press drives the upper mold frame and the stripper plate assembly to move downward as a whole. At this time, the second elastic member 160 is in a released state, there is a certain distance between the stripper plate and the upper mold frame, and the punch is hidden in the stripper plate. The first pressing piece and the second pressing piece are in a downward ejection state. As the press continues to move downward, the first pressing piece 111 and the second pressing piece 112 are in contact with the product first. If the product is warped and uneven, at this time, as the press continues to move downward, the springs on the back of the first pressing piece 111 and the second pressing piece 112 begin to compress, and the first pressing piece 111 and the second pressing piece 112 will flatten the warped product and gently press the product into the positioning component, so that the product is accurately positioned. As the press continues to move downward, the first pressing piece 111 and the second pressing piece 112 are completely compressed. The lower surface of the stripper plate begins to contact the product, pressing the product against the lower template. At this time, the second elastic member 160 installed on the upper mold frame begins to be stressed. As the press continues to apply pressure, the second elastic member 160 is still compressed. After the second elastic member 160 is compressed by 3mm-5mm, the upper die-cutting edge insert and the punch begin to leak out of the lower surface of the stripper plate and come into contact with the product. As the press continues to apply pressure, the second elastic member 160 continues to compress, and the upper die-cutting edge insert and the punch cut off the excess material on the product. The press reaches the lowest working point. The removed waste falls into the waste collection device. As the press continues to work, the upper slide of the press begins to move upward. As the press moves upward, the various parts of the mold work in the opposite state to when the press moves downward. The active parts of the mold are released and separated in turn, and finally the upper and lower molds are separated. When the press moves up to a certain distance, the production equipment controls the cylinder to drive the positioning component to move downward until the positioning component is completely retracted into the lower mold plate. The press returns to the uppermost point of the work, and a complete working stroke is completed at this time. The product can be taken out manually or automatically.

[0049] The mold provided by the present application has high positioning accuracy and can meet the positioning requirements of large-scale automated production. The structure is simple to assemble, easy to maintain, and efficient to use, meeting the characteristics of automated production. The method minimizes the various influences that may cause inaccurate positioning and deformation of positioning holes during the production of metal plates, and maximizes the positioning accuracy of the product. The lifting structure of the locating pin is changed, that is, the positioning component is driven by a driving cylinder, and each driving cylinder is independently controlled to ensure that the lower part of the mold has sufficient support. At the same time, the pressing structure of the upper mold, namely the first pressing piece and the second pressing piece, is added to ensure that the product can automatically enter the locating pin under the premise that the product is warped. The positioning of the mold is made more reliable, and large-scale automated production can be used. It has greatly promoted the development of fuel cell metal plates.

[0050] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0051] The mold provided according to the present application includes an upper mold assembly 100, a lower mold assembly 300 and a positioning assembly 400. The upper mold assembly 100 includes a pressing portion 110; the lower mold assembly 300 is opposite to the upper mold assembly 100, and a placement cavity for accommodating the product 200 is provided on the lower mold assembly. The upper mold assembly 100 is movably arranged in a direction approaching or moving away from the lower mold assembly 300 so that the pressing portion 110 applies pressure to the product 200 or moves away from the product 200; the positioning assembly 400 is arranged on the lower mold assembly 300, and at least a portion of the positioning assembly 400 is movably arranged in a vertical direction so as to be inserted into the positioning hole of the product 200 to position the product 200, or to avoid the product 200. In this way, with the cooperation between the pressing part 110 and the positioning component 400, before punching the product 200, the deformed and bent part of the product 200 is flattened. At this time, the positioning component 400 is in a position to avoid the product 200, so as to avoid the pressing part 110 causing interference with the product 200 during the pressing process, thereby causing damage to the product 200. After the product 200 is flattened, the positioning hole on the product 200 is opposite to the positioning component 400, and the positioning component 400 moves until it extends into the positioning hole of the product 200, thereby positioning the product 200 during the punching process, thereby improving the positioning accuracy of the product 200 and ensuring the quality of the product 200.

[0052] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0053] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0054] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0055] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0056] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mold, characterized in that: include: An upper mold assembly (100), wherein the upper mold assembly (100) comprises a material pressing portion (110); a lower mold assembly (300) opposite to the upper mold assembly (100), the lower mold assembly (300) being provided with a placement cavity for accommodating the product (200), the upper mold assembly (100) being movably arranged in a direction approaching or moving away from the lower mold assembly (300), so that the pressing portion (110) applies pressure to the product (200) or moves away from the product (200); A positioning assembly (400) is arranged on the lower mold assembly (300), and at least a portion of the positioning assembly (400) is movably arranged in the vertical direction so as to be inserted into the positioning hole of the product (200) to position the product (200) or to avoid the product (200).

2. The mold according to claim 1, characterized in that: The positioning assembly (400) comprises: A positioning component (410) is arranged on the lower mold assembly (300), the positioning component (410) is movably arranged in a vertical direction, and at least a portion of the positioning component (410) is inserted into the positioning hole; A driving component (420) is arranged on the lower mold assembly (300) and is drivingly connected to the positioning component (410). The driving component (420) has a telescopically arranged driving rod, and the driving rod is drivingly connected to the positioning component (410).

3. The mold according to claim 2, characterized in that: The positioning component (410) has a guide portion (411) at one end away from the driving component (420), and the guide portion (411) has a guide surface, at least a portion of which is a conical surface.

4. The mold according to claim 2, characterized in that: The lower mold assembly (300) comprises a lower mold base (310) and a lower mold plate (320) connected to each other, a first installation cavity (311) is arranged in the lower mold base (310), and a first through hole (321) is arranged on the lower mold plate (320); The driving component (420) is arranged in the first installation cavity (311), and at least a portion of the positioning component (410) is passed through the first through hole (321); Wherein, a stop protrusion (412) is provided on the positioning component (410), and the stop protrusion (412) protrudes relative to the surface of the positioning component (410), and the stop protrusion (412) and the bottom surface of the lower template (320) stop each other to limit the positioning component (410).

5. The mold according to claim 1, characterized in that: The positioning components (400) are multiple groups, and the multiple groups of positioning components (400) are arranged on the lower mold component (300) at intervals; Wherein, each group of the positioning components (400) comprises a positioning component (410) and a driving component (420), respectively; the driving component (420) is drivingly connected to the positioning component (410) so that the driving component (420) drives the positioning component (410) to move, so that the positioning component (410) positions the product (200).

6. The mold according to claim 1, characterized in that: The upper mold assembly (100) includes a stripper plate (120), and the pressing portion (110) includes: A plurality of first pressing pieces (111) are arranged at intervals on the stripping plate (120), and each of the first pressing pieces (111) protrudes from the stripping plate (120) toward the direction close to the lower mold assembly (300).

7. The mold according to claim 1, characterized in that: The upper mold assembly (100) includes a stripper plate (120), and the pressing portion (110) further includes: A second pressing piece (112), the second pressing piece (112) is arranged opposite to the positioning assembly (400), and the second pressing piece (112) is movably arranged along the vertical direction.

8. The mold according to claim 1, characterized in that: The upper mold assembly (100) comprises an upper clamping plate (130) and a stripping plate (120) connected to each other, the upper clamping plate (130) is provided with a second installation cavity (131), the stripping plate (120) is provided with a second through hole (121) opposite to and in communication with the second installation cavity (131), and the pressing portion (110) further comprises: A second pressing piece (112), at least a portion of the second pressing piece (112) being inserted into the second through hole (121); The first elastic member (113) is arranged in the second installation cavity (131), and the two ends of the first elastic member (113) are respectively connected to the inner wall surface of the second installation cavity (131) and the second pressing member (112), and the first elastic member (113) can be elastically arranged to push the second pressing member (112) to fit the product (200) through the elastic restoring force of the first elastic member (113).

9. The mold according to claim 8, characterized in that: An avoidance channel (1120) is provided in the second pressing member (112), and the avoidance channel (1120) is opposite to the positioning component (400). At least a portion of the positioning component (400) passes through the positioning hole and then enters into the avoidance channel (1120) to position the product (200).

10. The mold according to claim 8, characterized in that: The aperture of the second through hole (121) is smaller than the inner diameter of the second mounting cavity (131); a first step structure (132) is provided between the second mounting cavity (131) and the second through hole (121); a second step structure (1121) is provided on the second pressing piece (112); at least a portion of the second step structure (1121) is interlocked with the first step structure (132) to limit the second pressing piece (112).

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