Die

Abstract

The invention provides a mold. The mold comprises an upper mold assembly and a lower mold assembly, the lower die assembly is opposite to the upper die assembly, the lower die assembly comprises a first forming part and a second forming part, the second forming part is arranged around the first forming part, and the first forming part is movably arranged relative to the position of the second forming part so that the first area of the workpiece can be machined through the first forming part; a second area of the workpiece is machined through a second forming part; when the upper die assembly is located at the opening position, the first machining surface of the first forming part is higher than the second machining surface of the second forming part. The problem that in the prior art, the machining efficiency of a metal pole plate is low is solved.

Description

Technical Field

[0001] The invention relates to the technical field of metal pole plate processing moulds, and in particular to a mould. 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 the depth deviation between the flow channel and the sealing groove of the metal plate exceeds the tolerance during the molding process, it will affect the sealing performance of the fuel cell. This causes inconsistent contact between the various parts during the fuel cell press assembly process, resulting in reduced fuel cell performance or 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 molding accuracy of the metal plate is a necessary requirement to ensure the quality of the metal bipolar plate.

[0003] Since the metal bipolar plate uses an ultra-thin material with a plate thickness of 0.07mm-0.12mm, and the metal plate flow channel has a complex shape and a large molding area, the metal plate flow channel area requires a greater molding pressure than the outer area during the molding process. The main methods of metal plate stamping are: single-step molding controls the depth consistency of the plate by performing depth compensation during processing. Another molding method is to achieve the precision requirements of the metal plate through multi-step molding. The existing method of achieving depth control through processing compensation may require multiple mold trials and processing modifications for different products. This method is costly and has a long cycle; multi-step molding requires multiple sets of molds, which is costly, has a long manufacturing cycle, and requires high repeated positioning accuracy for the product. The above molding methods all reduce the processing efficiency of metal plates. Summary of the invention

[0004] The main purpose of the present invention is to provide a mold to solve the problem of low processing efficiency of metal plates in the prior art.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a mold is provided, comprising: an upper mold assembly; a lower mold assembly, opposite to the upper mold assembly, the lower mold assembly comprising a first molding part and a second molding part, the second molding part is arranged around the first molding part, and the first molding part is movably arranged relative to the position of the second molding part, so as to process a first area of ​​the workpiece through the first molding part and process a second area of ​​the workpiece through the second molding part; wherein, when the upper mold assembly is in an open position, a first processing surface of the first molding part is higher than a second processing surface of the second molding part.

[0006] Furthermore, the lower mold assembly also includes: a third molding part, which is arranged around the second molding part and is movably arranged relative to the first molding part; a first positioning part is arranged on the third molding part, and at least part of the first positioning part contacts the side of the workpiece to position the workpiece.

[0007] Furthermore, the third molding part includes a third molding piece, which is arranged around the second molding part; a positioning end surface is arranged on the third molding piece, and the first positioning part is arranged on the positioning end surface, and the first positioning part is protruded relative to the positioning end surface; when the upper mold assembly is in the open position, the positioning end surface is higher than the first processing surface of the first molding part.

[0008] Further, the third molding part includes a third molding piece, which is arranged around the second molding part; a positioning end face is arranged on the third molding piece; the third molding part also includes: a second positioning part, the second positioning part extends along the circumferential direction of the third molding part, the second positioning part protrudes relative to the positioning end face, and at least part of the second positioning part is in contact with the workpiece.

[0009] Furthermore, the third molding part includes a third molding piece, and the third molding piece is arranged around the second molding part; the lower mold assembly also includes: a lower mold base, and the first molding part and the second molding part are respectively arranged on the lower mold base; a first elastic piece is arranged between the lower mold base and the third molding piece, and the two ends of the first elastic piece are respectively connected to the lower mold base and the third molding piece, and the first elastic piece can be elastically arranged.

[0010] Furthermore, a first guide hole is provided on the third molded part, and the lower mold assembly further includes: a first guide member, which is provided on the lower mold base, and at least a portion of the first guide member is passed through the first guide hole to guide the third molded part.

[0011] Furthermore, a second guide hole is provided on the third molded part, a first mounting hole is provided on the lower mold base, and the lower mold assembly also includes: a limiting component, which is provided in the first mounting hole, and an end of the limiting component away from the lower mold base is inserted into the second guide hole, a first limiting portion is provided on the hole wall surface of the first mounting hole, and a second limiting portion is provided on the limiting component, and at least part of the first limiting portion extends toward the middle direction of the first mounting hole, and the second limiting portion is stopped by the first limiting portion to limit the limiting component.

[0012] Furthermore, the first molding portion includes a first molding piece, and the lower mold assembly also includes: a lower mold base, arranged below the first molding piece; a second elastic piece, arranged between the lower mold base and the first molding piece, the second elastic piece is telescopically arranged, and both ends of the second elastic piece are respectively connected to the lower mold base and the first molding piece.

[0013] Furthermore, the lower mold assembly also includes: a first lower pad, connected to the lower mold base, and the second molding part is arranged on the first lower pad; a second lower pad, arranged between the first molding part and the first lower pad, the second lower pad is fixedly connected to the first molding part, and there is a gap between the first lower pad and the second lower pad, and the two ends of the second elastic part are respectively connected to the first lower pad and the second lower pad.

[0014] Furthermore, the second molded portion includes a second molded component, the second molded component is fixedly connected to the first lower pad, the second molded component extends along the circumference of the first lower pad to enclose a limiting space, and the first molded component is arranged in the limiting space.

[0015] According to the technical solution of the present invention, the mold includes an upper mold assembly and a lower mold assembly, the lower mold assembly is opposite to the upper mold assembly, the lower mold assembly includes a first molding part and a second molding part, the second molding part is arranged around the first molding part, and the first molding part is movably arranged relative to the position of the second molding part, so that the first area of ​​the workpiece is processed by the first molding part, and the second area of ​​the workpiece is processed by the second molding part; wherein, when the upper mold assembly is in an open position, the first processing surface of the first molding part is higher than the second processing surface of the second molding part. In this way, during the processing of the workpiece, the first molding part and the second molding part are used to process the first area and the second area of ​​the product respectively, so as to realize the partition molding of the workpiece, and the position of the first molding part can be adjusted to adjust the force applied to the first area of ​​the workpiece during the processing, so as to reduce the dimensional deviation of the product caused by excessive deformation under high pressure, and there is no need to manually process the workpiece again after the processing is completed, and there is no need to process the workpiece again, so as to improve the processing efficiency of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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:

[0017] Figure 1 A schematic structural diagram of an embodiment of a mold according to the present invention is shown;

[0018] Figure 2 shows a cross-sectional view of a mold according to the present invention;

[0019] Figure 3 Shown according to Figure 2 A magnified view of part A;

[0020] Figure 4 A schematic diagram of assembling the limiting component of the mold according to the present invention is shown;

[0021] Figure 5 A schematic structural diagram of a workpiece according to the present invention is shown;

[0022] Figure 6 A schematic structural diagram of a first processing area of ​​a workpiece according to the present invention is shown;

[0023] Figure 7 A schematic structural diagram of a second processing area of ​​a workpiece according to the present invention is shown.

[0024] The above drawings include the following reference numerals:

[0025] 100, upper mold assembly; 110, top plate; 120, upper pad; 130, upper mold core; 140, second guide member;

[0026] 200, lower mold assembly; 210, first molding part; 2101, first processing surface; 211, first molding part; 220, second molding part; 2202, second processing surface; 221, second molding part; 230, third molding part; 231, first positioning part; 232, third molding part; 2320, positioning end surface; 233, second positioning part; 240, lower mold base; 241, first elastic member; 2321, first guide hole; 242, first guide member; 2322, second guide hole; 2401, first mounting hole; 243, limiting member; 2420, first limiting part; 2430, second limiting part; 244, second elastic member; 251, first lower pad; 252, second lower pad; 260, guide sleeve; 270, lower pad; 280, bottom plate;

[0027] 300, workpiece; 310, first processing area; 320, second processing area. DETAILED DESCRIPTION

[0028] 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.

[0029] As mentioned in the background technology, when processing metal plates, according to the structural characteristics of the metal plates, it is necessary to process the flow channel structure in the middle of the metal plates and process the sealing groove structure on the side of the flow channel structure. However, since the flow channel structure and the sealing groove structure require different molding pressures during the formation process, but the flow channel structure and the sealing groove structure are processed synchronously during mold processing, therefore, when processing metal plates, after the plate is stamped, it is necessary to manually compensate for the depth of the flow channel or the sealing groove to ensure the consistency of the depth of the two, or adopt a multi-step molding method, which requires multiple sets of molds to repeatedly process the metal plates. However, the processing method using multiple sets of molds requires high repeated positioning accuracy of the metal plates, and the processing flow is complicated. The method of manual adjustment after stamping requires multiple parameter settings for different products, which not only increases labor intensity, but also reduces the production efficiency of metal plates. Therefore, in view of the above technical problems, in the mold of the present application, the lower mold assembly 200 includes a first molding portion 210 and a second molding portion 220, the second molding portion 220 is arranged around the first molding portion 210, and the first molding portion 210 is movably arranged relative to the second molding portion 220, so that the first molding portion 210 can be used to process the first area of ​​the workpiece 300, and the second molding portion 220 can be used to process the second area of ​​the workpiece. When the upper mold assembly 100 is in the open position, the first processing surface 2101 of the first molding portion 210 is higher than the second processing surface 2101 of the second molding portion 220. 202. During the process of the upper mold assembly 100 and the lower mold assembly 200 being bonded together, the upper mold assembly 100 is bonded to the first area of ​​the workpiece 300 first, and the first area is processed, and then the upper mold assembly 100 is bonded to the second area of ​​the workpiece 300, and the second area is processed. In this way, when the second area is stamped, the first area can also be processed for the second time, and the molding control of different areas of the workpiece 300 can be realized, which improves the product precision and the molding quality of the product. In addition, when the mold is worn or needs to be adjusted, it is more convenient to repair or replace the separate molding part, which reduces the cost and cycle of mold maintenance and improves production efficiency. At the same time, the design of partition molding also makes the overall structure of the mold more flexible, which can adapt to the adjustment of different products or different molding requirements, and enhances the versatility and adaptability of the mold.

[0030] Please refer to Figures 1 to 4The present application provides a mold, including: an upper mold assembly 100; a lower mold assembly 200, opposite to the upper mold assembly 100, the lower mold assembly 200 includes a first molding part 210 and a second molding part 220, the second molding part 220 is arranged around the first molding part 210, and the first molding part 210 is movably arranged relative to the position of the second molding part 220, so as to process a first area of ​​a workpiece 300 through the first molding part 210, and process a second area of ​​the workpiece 300 through the second molding part 220; wherein, when the upper mold assembly 100 is in an open position, a first processing surface 2101 of the first molding part 210 is higher than a second processing surface 2202 of the second molding part 220.

[0031] According to the mold provided in the present application, it includes an upper mold assembly 100 and a lower mold assembly 200, the lower mold assembly 200 is opposite to the upper mold assembly 100, and the lower mold assembly 200 includes a first molding part 210 and a second molding part 220, the second molding part 220 is arranged around the first molding part 210, and the first molding part 210 is movably arranged relative to the position of the second molding part 220, so as to process a first area of ​​the workpiece 300 through the first molding part 210, and process a second area of ​​the workpiece 300 through the second molding part 220; wherein, when the upper mold assembly 100 is in the open position, the first processing surface 2101 of the first molding part 210 is higher than the second processing surface 2202 of the second molding part 220. In this way, during the processing of the workpiece 300, the first forming part 210 and the second forming part 220 are used to process the first area and the second area of ​​the product respectively, so as to realize the partitioned forming of the workpiece 300, and the force applied to the first area of ​​the workpiece 300 during the processing can be adjusted by adjusting the position of the first forming part 210, thereby reducing the dimensional deviation of the product caused by excessive deformation under high pressure. After the processing is completed, there is no need to manually re-process the workpiece 300, nor is there any need to re-process the workpiece, thereby improving the processing efficiency of the workpiece.

[0032] Specifically, the lower mold assembly 200 further includes: a third molding portion 230, which is arranged around the second molding portion 220, and the third molding portion 230 is movably arranged relative to the first molding portion 210; a first positioning portion 231 is arranged on the third molding portion 230, and at least a portion of the first positioning portion 231 is inserted into the positioning hole of the workpiece to position the workpiece 300. During the processing, the positioning hole on the workpiece 300 contacts the first positioning portion 231, and the workpiece 300 is positioned in a predetermined processing area.

[0033] In the specific implementation process, Figure 2 and Figure 3As shown, the third molding part 230 includes a third molding member 232, and the third molding member 232 is arranged around the second molding member 220; a positioning end face 2320 is arranged on the third molding member 232, and a first positioning portion 231 is arranged on the positioning end face 2320, and the first positioning portion 231 is arranged protruding relative to the positioning end face 2320; when the upper mold assembly 100 is in the open position, the positioning end face 2320 is higher than the first processing surface 2101 of the first molding part 210. The workpiece is positioned by the first positioning portion 231, and the position of the workpiece during the processing can be ensured to be accurate, thereby avoiding processing errors caused by the displacement of the workpiece position. Preferably, the first positioning portion 231 is a positioning convex block, and there are multiple positioning convex blocks, and the multiple positioning convex blocks are arranged at intervals along the circumference of the third molding member 232 to enclose a limiting space for limiting the workpiece 300.

[0034] In the present application, the third molding part 230 includes a third molding member 232, which is arranged around the second molding part 220; a positioning end face 2320 is arranged on the third molding member 232; the third molding part 230 also includes: a second positioning portion 233, the second positioning portion 233 extends along the circumferential direction of the third molding member 232, the second positioning portion 233 protrudes relative to the positioning end face 2320, and at least a portion of the second positioning portion 233 is in contact with the workpiece 300. Preferably, the second positioning portion 233 is located on the side of the first positioning portion 231 close to the second forming portion 220. Preferably, the second positioning portion 233 is a positioning rib, which is helpful in controlling the flow deformation of the sheet material during the forming process when the workpiece 300 is processed. When the force between the positioning rib and the workpiece 300 is too large, the deformation force of the workpiece 300 blocked by the positioning rib increases, and the workpiece 300 is more likely to wrinkle. When the force between the positioning rib and the workpiece 300 is too small, the deformation flow performance of the workpiece 300 increases, and the workpiece 300 is more likely to deform and warp.

[0035] like Figure 2As shown, the third forming part 230 includes a third forming piece 232, which is arranged around the second forming part 220; the lower mold assembly 200 also includes: a lower mold base 240, on which the first forming part 210 and the second forming part 220 are respectively arranged; a first elastic member 241, which is arranged between the lower mold base 240 and the third forming piece 232, and the two ends of the first elastic member 241 are respectively connected to the lower mold base 240 and the third forming piece 232, and the first elastic member 241 can be elastically arranged. Preferably, the first elastic member 241 is a spring, and the elastic force of the first elastic member 241 is used to provide a force for the movement and reset of the third forming piece 232. Before the mold is closed, the third forming piece 232 is maintained at a certain height by the action of the spring, which is higher than the first forming piece 211 and the second forming piece 221. When the metal sheet is placed in the mold, the spring enables the third forming piece 232 to gently press the sheet to ensure that the sheet is in the correct position, reduce the displacement of the sheet during the molding process, and improve the positioning accuracy of the molded product. The spring can also provide a buffering effect for the third forming part 232 during the up and down movement, avoiding damage to the plate due to sudden impact or pressure changes. At the same time, the spring cooperates with the first guide member 242 to ensure the precise guidance of the third forming part 232 in the vertical direction, so that it can move smoothly and accurately when pressing and releasing the plate, reducing the wear of the mold and the plate. The pressure of the spring can be preset to adapt to the molding of plates of different thicknesses or hardness. During the mold closing process, as the upper mold core is pressed down, the spring under the third forming part 232 is gradually compressed to provide pre-molding pressure for the plate. When the upper mold core fits the first forming part 211 and is further pressed down, the third forming part 232 will move with the first forming part 211. At this time, the compression of the spring increases, providing additional pressure for the secondary molding of the plate until the final pressure required for molding is reached. When the mold is opened, the spring quickly returns to its original state, driving the third forming part 232 to rise and detach from the plate, so that the formed metal plate can be easily removed from the mold, improving production efficiency. At the same time, the quick return of the spring also reduces the resistance when removing the product, avoiding additional stress or deformation of the molded product during the removal process.

[0036] Through the connection between the spring and the third forming part 232, this mold design can realize the pre-positioning, pre-compression, pressure adjustment and rapid release of the plate, improve the forming accuracy and efficiency of the metal plate, and also reduce the maintenance cost and cycle of the mold. The use of the spring makes the mold more flexible during operation, can meet the needs of forming different products, and enhances the versatility and production adaptability of the mold.

[0037] Furthermore, a first guide hole 2321 is provided on the third molded part 232, and the lower mold assembly 200 further includes: a first guide member 242, which is provided on the lower mold base 240, and at least a portion of the first guide member 242 is passed through the first guide hole 2321 to guide the third molded part 232. The first guide member 242 passes through the first guide hole 2321, and during the pressing process of the upper mold assembly 100, it can not only guide the third molded part 232, but also cooperate with the first inner guide sleeve in the upper mold assembly 100 to guide the upper mold assembly 100.

[0038] The third molded part 232 is also provided with a second guide hole 2322, the lower mold base 240 is provided with a first mounting hole 2401, and the lower mold assembly 200 further includes: a limiting component 243, which is provided in the first mounting hole 2401, and one end of the limiting component 243 away from the lower mold base 240 is inserted into the second guide hole 2322, a first limiting portion 2420 is provided on the hole wall of the first mounting hole 2401, and a second limiting portion 2430 is provided on the limiting component 243, at least part of the first limiting portion 2420 extends toward the middle of the first mounting hole 2401, and the second limiting portion 2430 is stopped by the first limiting portion 2420 to limit the limiting component 243. The setting of the limiting component 243 not only ensures the moving range of the third molded part, but also improves the safety and reliability of the processing process. In the molding process of complex curved workpieces, such as mobile phone housings, car dashboards, etc., the shape of the workpiece often has complex geometric features and requires precision molding in multiple directions. The mold design accurately controls the movement of the third molded part through a limiting component, avoiding molding errors caused by excessive movement range, ensuring high-precision molding of complex curved workpieces, and reducing the risk of equipment damage caused by excessive mold movement. Preferably, the limiting component 243 is a limiting bolt. In the present application, the limiting bolt is inserted into the guide sleeve, and the second limiting portion 2430 is arranged on the guide sleeve. The second limiting portion 2430 is a step structure and abuts against the first limiting portion 2420 to achieve the purpose of limiting.

[0039] In the present application, a second mounting hole is provided on the first lower pad 251, and the aperture of the second mounting hole is smaller than the aperture of the first mounting hole 2401, so that a step end surface cooperating with the second limiting portion 2430 is formed between the first mounting hole 2401 and the second mounting hole to limit the limiting bolt.

[0040] Further, the first molding part 210 includes a first molding part 211, and the lower mold assembly 200 also includes: a lower mold base 240, which is arranged below the first molding part 211; a second elastic member 244, which is arranged between the lower mold base 240 and the first molding part 211, and the second elastic member 244 is arranged telescopically, and the two ends of the second elastic member 244 are respectively connected to the lower mold base 240 and the first molding part 211. The arrangement of the second elastic member can provide elastic support for the first molding part, which helps to keep the workpiece in close contact with the first molding part during the processing, and is particularly suitable for workpieces that require high pressure molding. Preferably, the second elastic member 244 is a nitrogen spring.

[0041] Nitrogen springs provide stable and adjustable high pressure, which is critical during the molding process. Compared with traditional mechanical springs, nitrogen springs can maintain more uniform pressure during compression and release, which is very important for ensuring the accuracy and consistency of the metal plate during the molding process. Nitrogen springs are used to control the movement of the first molded part relative to the second molded part. In the early stage of mold closure, the nitrogen spring keeps the first molded part in the pre-molding position, at which time the protrusions on the lower mold core pre-mold the metal sheet to form the preliminary shape of the sealing groove. Pre-molding can be performed at a lower pressure, which helps to improve the molding accuracy of the sealing groove area. When the upper mold core continues to press down and contact the lower molding plate, the nitrogen spring will provide enough pressure to enable the lower mold core to be further pressed down together with the floating plate (or upper mold core) to achieve secondary molding of the runner area of ​​the metal sheet. Secondary molding is performed at a higher pressure, which helps to ensure high-precision molding of the runner area while avoiding excessive stress and deformation caused by primary molding. The pressure of the nitrogen spring can be adjusted as needed, which facilitates the debugging of the mold. During the use of the mold, if the molding pressure is found to be insufficient or excessive, the pressure of the nitrogen spring can be adjusted to compensate without physically modifying the mold, which greatly reduces the debugging cost and time. The nitrogen spring can absorb and buffer the impact force during the molding process, reducing the damage to the mold and stamping equipment during high-pressure molding. This helps to extend the service life of the mold and the stability of the equipment. The use of nitrogen springs provides flexibility in mold maintenance and adjustment. When a part of the mold (such as the core below) needs to be replaced due to wear, the nitrogen spring can be easily removed and reinstalled without affecting the function and positioning accuracy of other parts of the mold.

[0042] In the embodiment provided in the present application, the lower mold assembly 200 also includes: a first lower pad 251, which is connected to the lower mold base 240, and the second molding portion 220 is arranged on the first lower pad 251; a second lower pad 252, which is arranged between the first molding part 211 and the first lower pad 251, and the second lower pad 252 is fixedly connected to the first molding part 211, and there is a gap between the first lower pad 251 and the second lower pad 252, and the two ends of the second elastic member 244 are respectively connected to the first lower pad 251 and the second lower pad 252.

[0043] The second molding part 220 includes a second molding part 221, which is fixedly connected to the first lower pad 251. The second molding part 221 extends along the circumference of the first lower pad 251 to enclose a limited space, and the first molding part 211 is arranged in the limited space. Through the arrangement of the first / second lower pads, a stable support can be provided for the first molding part and the second molding part, and the height of the first molding part can be adjusted by the second elastic part, which is suitable for workpieces that need to be molded at different heights.

[0044] Through the relative movement of the first molding part 210 and the second molding part 220, precise processing of different areas of the workpiece is achieved, and the processing efficiency and accuracy are improved. At the same time, the positioning of the workpiece by the third molding part 230 ensures the stability of the workpiece during the processing, and further improves the processing quality. The setting of the elastic part makes the mold have a buffering effect during the opening and closing process, prolongs the service life of the mold, and reduces the maintenance cost. The use of guide parts and limit parts ensures the precise alignment and stable operation between the components, and improves the overall performance of the mold. This design not only optimizes the structure of the mold, but also improves production efficiency.

[0045] Among them, the second molded part 221, the first lower pad 251, the lower die seat 240, the lower pad 270, and the bottom plate 280 are fixed by bolts, pinned and connected as a whole, and fixed on the lower worktable of the press. The third molded part 232 is driven by the first elastic part, guided by the first guide part, and limited by the limit component 243, and has a relative motion relationship with the fixed part of the lower die. The first molded part and the second lower pad 252 are fixed by bolts, pinned and connected as a whole, and the whole is driven by the second elastic part 244, guided by the guide column, and limited by the bolts, and has a relative motion relationship with the fixed part of the lower die. The floating height of the third molded part is greater than the floating height of the first molded part.

[0046] The third molded part 232 is provided with a first inner guide sleeve which is slidably matched with the first guide member 242 installed on the first lower pad 251, and guides the third molded part during its up and down movement. A limiting bolt which limits the position of the lower die seat is installed on the lower side of the third molded part. The limiting bolt passes through the first lower pad, and the third molded part is limited by the fitting surface between the sleeve hanger of the limiting bolt and the first lower pad 251. A limiting bolt avoidance hole is processed on the lower die seat 240. A first elastic member 241 is also installed between the third molded part 232 and the lower die seat 240. The first elastic member 241 passes through the through hole of the first lower pad 251 and is placed between the third molded part 232 and the lower die seat 240. Two first positioning parts 231 are installed on the front side, the rear side, the left side, and the right side of the third molded part 232 to position the sheet material.

[0047] The first molded part 211 and the second lower pad 252 are fixed by bolts and are positioned and connected as a whole by pins. The second lower pad 252 is equipped with an inner guide column that is slidably matched with the second inner guide sleeve installed on the first lower pad 251 to guide the first molded part 211 during its up and down movement. A limiting bolt for limiting its position is installed on the lower side of the second lower pad 252. The limiting bolt passes through the first lower pad, and the first molded part is limited by the fitting surface of the sleeve hanger of the limiting bolt and the lower side of the second lower pad. The lower die seat 240 is processed with a limiting bolt avoidance hole. A nitrogen spring (second elastic member 244) is also installed between the second lower pad 252 and the lower die seat 240. The nitrogen spring passes through the through hole of the lower pad and is placed between the second lower pad 252 and the lower die seat 240.

[0048] The mold of this application takes the processing of metal plates as an example. Figures 5 to 7 As shown, the metal sheet has a first processing area 310 and a second processing area 320, the flow channel structure is processed in the first processing area 310, and the sealing groove structure is processed in the second processing area 320. Before the press moves, the mold is in an open state, and the upper and lower mold frames are completely separated. The metal sheet is placed in the positioning block of the third molded part. At this time, due to the presence of the spring, the third molded part 232 floats, and the upper surface of the third molded part is higher than the upper surface of the first molded part and higher than the upper surface of the molding plate. The first molded part is also in a floating state due to the presence of the nitrogen spring, and the floating height is higher than the molding plate and lower than the third molded part.

[0049] When the mold is working, the upper slider of the press drives the upper mold frame to move downward. The upper mold assembly 100 includes a top plate 110, an upper pad 120 and an upper mold core 130 connected to each other. As the press continues to move downward, the second guide member 140 installed on the upper mold frame begins to contact the guide sleeve 260 installed on the lower mold frame. The press continues to move downward and the second guide member 140 enters the guiding state. When the guiding amount of the second guide member 140 reaches 30mm-50mm, the third inner guide sleeve installed on the upper mold core 130 begins to guide with the first guide member 242 on the lower mold frame that passes through the third forming member. When the guiding amount of the first guide member 242 reaches 10mm-20mm, the upper mold core 130 first contacts the third forming member. As the press continues to move downward, the coil spring on the lower side of the third forming member begins to compress, and the metal sheet is pressed between the upper mold core and the third forming member. When the third forming member moves downward a certain distance with the press, the upper mold core fits the first forming member. The press continues to move downward and apply pressure. Since the nitrogen spring is installed on the lower side of the second lower pad, the overall pressure is relatively large. At this time, the metal sheet between the upper and first molded parts begins to deform under the action of pressure. However, since the force provided by the nitrogen spring does not reach the molding pressure of the product flow channel, the flow channel area is preformed. When the pressure applied by the press is greater than the sum of the total pressure of all nitrogen springs in the lower mold and the total pressure of all springs of the third molded part, the third molded part and the first molded part continue to move downward with the upper mold. Until the upper mold core fits with the molding plate, at this time all the components of the mold are all fitted, and the press continues to apply pressure until the pressure required by the process is reached, and at the same time, the lowest point of the press is reached. The middle area of ​​the product is secondary molded, and the sealing groove area is first molded to achieve the required size of the product. As the press moves upward, the various parts of the mold work in the opposite state to the downward movement of the press. The active parts are released in sequence, and finally the upper and lower molds are separated. The press returns to the uppermost point, and a complete working stroke is completed at this time. The product is taken out after the stamping is completed. Using the mold of the above embodiment, the consistency of the depth of the sealing groove on the metal plate and the depth of the flow channel is improved, and the product precision and the molding quality of the product are improved.

[0050] After stamping, measure the product size. If a depth difference is found between the sealing groove area and the flow channel area, the mold can be disassembled and adjusted by adding a gasket under the molding plate or under the first molded part without having to correct it by machining the mold.

[0051] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0052] According to the mold provided in the present application, it includes an upper mold assembly 100 and a lower mold assembly 200, the lower mold assembly 200 is opposite to the upper mold assembly 100, and the lower mold assembly 200 includes a first molding part 210 and a second molding part 220, the second molding part 220 is arranged around the first molding part 210, and the first molding part 210 is movably arranged relative to the position of the second molding part 220, so as to process a first area of ​​the workpiece 300 through the first molding part 210, and process a second area of ​​the workpiece 300 through the second molding part 220; wherein, when the upper mold assembly 100 is in the open position, the first processing surface 2101 of the first molding part 210 is higher than the second processing surface 2202 of the second molding part 220. In this way, during the processing of the workpiece 300, the first forming part 210 and the second forming part 220 are used to process the first area and the second area of ​​the product respectively, so as to realize the partitioned forming of the workpiece 300, and the force applied to the first area of ​​the workpiece 300 during the processing can be adjusted by adjusting the position of the first forming part 210, thereby reducing the dimensional deviation of the product caused by excessive deformation under high pressure. After the processing is completed, there is no need to manually re-process the workpiece 300, nor is there any need to re-process the workpiece, thereby improving the processing efficiency of the workpiece.

[0053] 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: Upper mold assembly (100); A lower mold assembly (200), opposite to the upper mold assembly (100), the lower mold assembly (200) comprising a first molding portion (210) and a second molding portion (220), the second molding portion (220) being arranged around the first molding portion (210), the first molding portion (210) being movably arranged relative to the position of the second molding portion (220), so as to process a first area of ​​a workpiece (300) through the first molding portion (210), and process a second area of ​​the workpiece (300) through the second molding portion (220); Wherein, when the upper mold assembly (100) is in an open position, the first processing surface (2101) of the first molding part (210) is higher than the second processing surface (2202) of the second molding part (220).

2. The mold according to claim 1, characterized in that: The lower mold assembly (200) further includes: a third forming portion (230), arranged around the second forming portion (220), the third forming portion (230) being movably arranged relative to the first forming portion (210); The third molding portion (230) is provided with a first positioning portion (231), and at least a portion of the first positioning portion (231) is aligned with a side surface of the workpiece (300) to position the workpiece (300).

3. The mold according to claim 2, characterized in that: The third molded portion (230) comprises a third molded piece (232), and the third molded piece (232) is arranged around the second molded portion (220); The third molded part (232) is provided with a positioning end surface (2320), the first positioning portion (231) is provided on the positioning end surface (2320), and the first positioning portion (231) is provided protruding relative to the positioning end surface (2320); When the upper mold assembly (100) is in the open position, the positioning end surface (2320) is higher than the first processing surface (2101) of the first molding portion (210).

4. The mold according to claim 2, characterized in that: The third forming portion (230) comprises a third forming piece (232), and the third forming piece (232) is arranged around the second forming portion (220); a positioning end surface (2320) is arranged on the third forming piece (232); The third forming part (230) further includes: A second positioning portion (233), the second positioning portion (233) extends along the circumferential direction of the third molded part (232), the second positioning portion (233) protrudes relative to the positioning end surface (2320), and at least a portion of the second positioning portion (233) is in contact with the workpiece (300).

5. The mold according to claim 2, characterized in that: The third molding portion (230) comprises a third molding piece (232), and the third molding piece (232) is arranged around the second molding portion (220); the lower mold assembly (200) further comprises: A lower mold base (240), wherein the first molding portion (210) and the second molding portion (220) are respectively arranged on the lower mold base (240); The first elastic member (241) is arranged between the lower mold base (240) and the third molding member (232), and the two ends of the first elastic member (241) are respectively connected to the lower mold base (240) and the third molding member (232), and the first elastic member (241) can be elastically arranged.

6. The mold according to claim 5, characterized in that: The third molded part (232) is provided with a first guide hole (2321), and the lower mold assembly (200) further comprises: A first guide member (242) is arranged on the lower mold base (240), and at least a portion of the first guide member (242) is inserted into the first guide hole (2321) to guide the third molded member (232).

7. The mold according to claim 5, characterized in that: The third molded part (232) is also provided with a second guide hole (2322), the lower mold base (240) is provided with a first mounting hole (2401), and the lower mold assembly (200) further comprises: A limiting component (243) is arranged in the first mounting hole (2401), and one end of the limiting component (243) away from the lower mold base (240) is inserted into the second guide hole (2322). A first limiting portion (2420) is arranged on the hole wall surface of the first mounting hole (2401), and a second limiting portion (2430) is arranged on the limiting component (243). At least a part of the first limiting portion (2420) extends toward the middle direction of the first mounting hole (2401), and the second limiting portion (2430) is stopped by the first limiting portion (2420) to limit the limiting component (243).

8. The mold according to claim 1, characterized in that: The first molding portion (210) comprises a first molding piece (211), and the lower mold assembly (200) further comprises: A lower mold base (240) is arranged below the first molded part (211); The second elastic member (244) is arranged between the lower mold base (240) and the first molding member (211); the second elastic member (244) is telescopically arranged; two ends of the second elastic member (244) are respectively connected to the lower mold base (240) and the first molding member (211).

9. The mold according to claim 8, characterized in that: The lower mold assembly (200) further includes: A first lower pad (251) connected to the lower die base (240), and the second molding portion (220) is arranged on the first lower pad (251); A second lower pad (252) is arranged between the first molded part (211) and the first lower pad (251); the second lower pad (252) is fixedly connected to the first molded part (211); there is a gap between the first lower pad (251) and the second lower pad (252); and two ends of the second elastic part (244) are respectively connected to the first lower pad (251) and the second lower pad (252).

10. The mold according to claim 9, characterized in that: The second molding portion (220) comprises a second molding member (221), the second molding member (221) being fixedly connected to the first lower pad (251), the second molding member (221) extending along the circumference of the first lower pad (251) to enclose a limiting space, and the first molding member (211) being arranged in the limiting space.

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