A thick plate precision stamping die

Abstract

A thick plate precision stamping processing die belongs to the technical field of stamping dies; it comprises: an upper die assembly and a lower die assembly, the upper die assembly comprises an upper die seat, an upper die frame plate, an upper die pad, an upper die fixing plate and an upper die positioning plate, the lower die assembly comprises a lower die seat, a lower die frame plate, a lower die pad and a lower die fixing plate; a plurality of column sleeve guide mechanisms; an outer unloading plate connected to the lower die fixing plate; an upper die positioned in the upper die positioning plate; a punch; an inner unloading plate member inserted in the upper die; a punch; a plurality of positioning guide blocks fixedly connected to the lower die frame plate, and the top ends of the plurality of positioning guide blocks are embedded in the outer unloading plate; a plurality of inner guide pillars for slidingly connecting the upper die positioning plate and the lower die fixing plate together; advantages: the stamping shear surface of the product has high smoothness and is free of defects such as fracture layers, thereby improving the product qualification rate; multiple guides are realized to ensure accurate guide positioning, improve processing efficiency and quality, and at the same time improve service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of stamping dies, and in particular relates to a precision stamping die for thick plates. Background Art

[0002] Stamping is a production technology that uses the power of conventional or special stamping equipment to directly subject sheet metal to deformation force in the die and perform corresponding punching operations, thereby obtaining product parts of certain shape, size and performance. Sheet metal, die and equipment are the three elements of stamping. Stamping dies are a special process equipment used in cold stamping to process materials (metal or non-metal) into parts (or semi-finished products). They are called cold stamping dies (commonly known as cold stamping dies). They use dies installed on the press to apply pressure to the material to separate it or perform stamping operations, thereby obtaining a pressure processing method for the required parts. However, the existing ordinary stamping and shearing dies can only be used on ordinary cold-rolled plates or stainless steel sheets, because the shear and tensile strength of ordinary cold-rolled plates and stainless steel sheets are relatively low, and the mold process is also easier to implement. For some metal thick plates (generally referring to plates with a thickness greater than 6 mm), the shear and tensile strength are very high. If the current ordinary stamping and shearing dies are used, after stamping, the shear surface of the thick plate will have obvious defects such as a fracture layer, and there will also be problems such as large collapse angles, cracks and burrs. The quality of the thick plate material after stamping will be seriously unqualified, seriously affecting production; in addition, since the shear and tensile strength of the thick plate are very high, the cutting edge of the ordinary mold is prone to chipping during the stamping process, resulting in a short service life of the mold parts, high cost and maintenance Frequent, and mass production cannot be achieved; and what is more fatal is that due to its own structural characteristics, ordinary punching machines are subject to large impact force, vibration and noise in the process of stamping thick plate materials. At the same time, it is also impossible to ensure a reasonable gap between the die and the punch during punching. If the gap between the die and the punch is large during punching, the material in the deformation zone will be subjected to a large stretching effect and tensile stress will be generated at the same time, resulting in microcracks and tears in the product. In addition, ordinary molds are unable to achieve precise control of the product position and pressure for thick plate stamping, which not only further makes the fracture layer of the product obvious, causing serious quality failures, but may also directly change the shape of the mold surface, which is easy to have an irreversible effect on the stamping finalization, seriously affecting production operations.

[0003] In view of the above situation, it is necessary to design a reasonable improvement of the stamping die so that it can be suitable for the stamping operation of thick plate products. For this reason, the applicant has made a useful design, and the technical solution to be introduced below is produced under this background. Utility Model Content

[0004] The task of the utility model is to provide a thick plate precision stamping processing mold with a compact structure, no fracture layer defects, long service life and good applicability, which is helpful to realize small gap punching operations for thick plate products through optimized structure and improve the work efficiency and product quality of stamping operations while ensuring that the shear surface of the punched through hole has excellent smoothness, which is beneficial to realize a variety of stress matching effects to achieve efficient and stable punching operations to further ensure processing accuracy, and is beneficial to further improve the reliability of operation by adding positioning guide blocks and inner guide columns to achieve multiple efficient and precise guiding and positioning effects, and is convenient to reduce stress concentration at the cutting edge by arranging an upper die cutting edge chamfer on the upper die, thereby increasing service life and reducing maintenance costs.

[0005] The task of the utility model is accomplished in this way. A thick plate precision stamping processing mold includes: an upper mold assembly and a lower mold assembly, the upper mold assembly and the lower mold assembly are arranged relatively up and down and the two can be relatively close to and relatively far away from each other, the upper mold assembly includes an upper mold base, an upper mold frame plate, an upper mold pad, an upper mold fixing plate and an upper concave mold positioning plate fixedly installed together from top to bottom, and the lower mold assembly includes a lower mold base, a lower mold frame plate, a lower mold pad and a lower mold fixing plate fixedly installed together from bottom to top; a plurality of column sleeve guide mechanisms, the column sleeve guide mechanisms are arranged on the upper mold frame plate and The lower die frame plate and the lower die frame plate are connected to each other and realize a sliding connection between the two; an outer unloading plate, which is movably connected to the upper part of the lower die fixing plate and is positioned at the lower position of the upper die assembly, and the outer unloading plate can realize the bearing and positioning of the product to be stamped. A plurality of nitrogen springs are also installed on the lower die seat, and the plurality of nitrogen springs sequentially pass through the lower die frame plate, the lower die pad plate and the lower die fixing plate and support to the bottom of the outer unloading plate; an upper concave die, which is positioned at the center of the upper concave die positioning plate and connected to the lower position of the upper die fixing plate, and at the side of the upper concave die facing downward The surface is also formed with an upper die protruding tooth portion that is adapted to the outer peripheral shape of the hole type to be punched of the product; a punch, which is correspondingly arranged at the lower position of the upper die, and the punch is fixedly installed at the center position of the upper surface of the lower die fixing plate and passes through the outer stripping plate upward; an inner stripping plate, which is inserted into the upper die and corresponding to the punch; a punching punch, which is used to punch holes in the product and is connected to the lower position of the upper die pad, and the punching punch is inserted into the inner stripping plate and its bottom end protrudes downward from the inner stripping plate; multiple A plurality of positioning guide blocks are fixedly connected to the upper surface of the lower mold frame plate and are positioned at the circumferential edge of the lower mold pad and the lower mold fixed plate, and the top ends of the plurality of positioning guide blocks can achieve sliding cooperation with the outer unloading plate and accurately position the outer unloading plate; a plurality of inner guide pillars are positioned on the lower mold frame plate and pass through the lower mold pad, the lower mold fixed plate and the outer unloading plate in sequence from bottom to top along the vertical direction and can penetrate into the upper die positioning plate to achieve sliding connection with them, so that the upper die positioning plate and the lower mold fixed plate are slidably connected together.

[0006] In a specific embodiment of the present invention, the column sleeve type guide mechanism has an outer guide column extending along the vertical direction and an outer guide sleeve arranged below the outer guide column, the top end of the outer guide column is fixedly connected to the upper mold frame plate, and the outer guide sleeve is fixedly connected to the lower mold frame plate and the outer guide sleeve is adapted to the outer guide column, the outer guide column can be inserted into the outer guide sleeve and slideably cooperate with it, thereby realizing the positioning and sliding connection between the upper mold frame plate and the lower mold frame plate.

[0007] In another specific embodiment of the present invention, the upper mold base includes an upper mold base platform plate arranged along the horizontal direction and a plurality of upper mold base support plates extending in a vertical state, the plurality of upper mold base support plates are fixedly connected at the lower position of the upper mold base platform plate, and the bottom ends of the plurality of upper mold base support plates are fixedly connected to the upper mold frame plate by fasteners; and the upper mold base also includes an upper mold base buffer limit plate connected to the lower position of the upper mold base platform plate, the upper mold base buffer limit plate is arranged corresponding to the inner unloading plate component and corresponds to the upper position of the inner unloading plate component, and a plurality of inner unloading plate component limiting columns are also connected to the inner unloading plate component, and the plurality of inner unloading plate component limiting columns pass through the upper mold fixing plate, the upper mold pad plate and the upper mold frame plate in sequence from bottom to top in the vertical direction, and the top end of the inner unloading plate component limiting column can be abutted against the upper mold base buffer limit plate.

[0008] In another specific embodiment of the present invention, the lower die assembly also includes a plurality of lower die adjustment gaskets arranged on the upper side surface of the lower die fixing plate, and the lower die adjustment gaskets are installed between the lower die fixing plate and the outer unloading plate; the lower die base includes a lower die base platform plate arranged along the horizontal direction and a plurality of lower die base support plates extending along the vertical direction, and the plurality of lower die base support plates are fixedly connected to the upper position of the lower die base platform plate, and the top ends of the plurality of lower die base support plates are connected and fixed together with the lower die frame plate through fasteners; and the plurality of nitrogen springs are installed on the lower die base platform plate, and the bottom end of the nitrogen spring is fixedly connected to the lower die base platform plate through a plurality of fasteners.

[0009] In another specific embodiment of the present invention, an upper die accommodating hole matched with the shape of the upper die is provided at the center position of the upper die positioning plate, and the upper die is positioned and installed in the upper die accommodating hole; and an upper die matching hole running through the thickness direction is provided in the upper die, and the upper die matching hole is matched with the shape of the inner unloading plate, and the inner unloading plate is matched and installed in the upper die matching hole and passes through the upper die downward; and the upper die is also provided with a plurality of upper die connecting screws extending upward, and the plurality of upper die connecting screws are inserted into the upper die fixing plate and threadedly connected with the corresponding screw holes provided on the upper die fixing plate, so that the upper die is fixedly connected to the upper die fixing plate; and a circle of upper die cutting edge chamfering is formed at the bottom axial edge of the upper die matching hole of the upper die.

[0010] In another specific embodiment of the present invention, the inner unloading plate also includes an inner unloading plate body; and a plurality of inner unloading plate body nail grooves that run through the height direction of the inner unloading plate body are also opened in the inner unloading plate body, and the bottom ends of the inner unloading plate body nail grooves are communicated with the bottom surface of the inner unloading plate body, and the inner unloading plate body nail grooves are sequentially arranged from top to bottom with inner unloading plate member screw plugs, inner unloading plate member springs and inner unloading plate member nails, the inner unloading plate member screw plugs are installed at the upper position of the inner unloading plate body nail groove, and the inner unloading plate member springs abut against the bottom of the inner unloading plate member screw plug, the inner unloading plate member nails pass downwardly out of the inner unloading plate body nail groove, and the inner unloading plate member springs can apply a downward force to the inner unloading plate member nails, so that the inner unloading plate member nails can press downward the hole material of the product to be punched.

[0011] In another specific embodiment of the utility model, the punching punch is cylindrical in shape, and the punching punch passes through the inner unloading plate body and is matched with the two; and a punching punch connecting bolt is also provided on the punching punch, which passes through the height direction of the punching punch along the vertical direction, and the punching punch connecting bolt is inserted into the upper die pad and is threadedly matched with the corresponding screw hole on the upper die pad, so that the punching punch is fixedly connected to the upper die pad.

[0012] In a more specific embodiment of the present invention, a pair of product limiting plates arranged in a spaced state are provided on the upper side surface of the outer unloading plate, and a product positioning groove adapted to the shape of the product to be punched is formed between the two product limiting plates, and the product positioning groove is used to position the product to be punched and allow the product to be punched to move therein; and a lower punching pressing piece is fixedly installed on the outer unloading plate and corresponding to the product positioning groove, the lower punching pressing piece is arranged at a position below the upper die, and a lower punching pressing piece tooth portion is convexly provided on the upper side surface of the lower punching pressing piece, the lower punching pressing piece tooth portion corresponds to the upper die tooth portion and the lower punching pressing piece tooth portion is adapted to the outer peripheral shape of the punching hole type of the product, and the lower punching pressing piece The protruding teeth of the pressing piece can abut against the surface of the product to be stamped facing the lower side; and a plurality of outer unloading plate spring nail grooves that penetrate the thickness direction of the plate body are also provided on the outer unloading plate, and the plurality of outer unloading plate spring nail grooves correspond to the lower position of the product positioning groove, and the outer unloading plate screw plug, the outer unloading plate spring spring and the outer unloading plate spring nail are sequentially arranged from bottom to top in the outer unloading plate spring nail groove, the outer unloading plate screw plug is installed at the bottom position of the outer unloading plate spring nail groove, and the outer unloading plate spring is arranged above the outer unloading plate screw plug, the outer unloading plate spring nail passes through the outer unloading plate body spring nail groove upward and abuts against the lower surface of the product to be stamped, and the outer unloading plate spring can apply an upward force to the outer unloading plate spring nail, so that the outer unloading plate spring nail can press the product to be stamped upward.

[0013] In yet another specific embodiment of the present invention, the punch is provided with a punch base and a convex module formed on the punch base; wherein, the punch base is fixedly mounted at the center position of the upper surface of the lower die fixing plate, the convex module is extended upward and passes upward through the outer unloading plate body and the lower punching pressing part, and the shape of the convex module is the same as the shape of the inner unloading plate, and a punch hole is also provided on the convex module that passes through its height direction, the shape of the punch hole is adapted to the shape of the punching punch, and the punching punch can be inserted into the punch hole, and the punch hole can both cooperate with the punching punch and allow punching waste to fall.

[0014] In another specific embodiment of the present invention, a plurality of positioning guide blocks are provided with a plurality of positioning guide block fixing bolts, and the plurality of positioning guide block fixing bolts pass through the height direction of the positioning guide block along the vertical direction and penetrate into the lower mold frame plate, and the plurality of positioning guide block fixing bolts are threadedly connected with the corresponding screw holes opened on the lower mold frame plate, so that the positioning guide block and the lower mold frame plate are fixedly connected; and the lower mold pad plate giving way groove and the lower mold fixing plate giving way groove are respectively opened at the circumferential edge positions of the lower mold pad plate and the lower mold fixing plate, and the lower mold pad plate and the lower mold fixing plate are fixedly connected. The shapes of the mold pad plate paving groove and the lower mold fixed plate paving groove are adapted to the outer peripheral shape of the positioning guide block, so that the positioning guide block can be positioned and set at the circumferential edge of the lower mold pad and the lower mold fixed plate; a positioning guide block top end portion is also convexly formed with a positioning guide block top end fitting portion, and an outer unloading plate step groove is correspondingly formed at the circumferential edge of the upper surface of the outer unloading plate, and the positioning guide block top end fitting portion can be fitted and connected in the outer unloading plate step groove, thereby realizing the positioning and guiding of the outer unloading plate by the positioning guide block.

[0015] After the utility model adopts the above structure, it has the beneficial effects: firstly, by optimizing the structure, after the upper die assembly and the lower die assembly are closed, the product is pressed against the bottom of the upper die by using the outer unloading plate supported on the nitrogen spring, so that the product can be punched into the upper die when the punch and the inner unloading plate are clamped, thereby realizing the punching and cutting action of hole-like features, and achieving small gap punching operation for thick plate products. Small gap punching can ensure that the punching gap between the upper die and the punch is about .% of the thickness of the sheet to be punched, so that the punched sheet always remains perpendicular to the punching direction, reducing the bending deformation of the deformation zone and ensuring that there is no Tensile stress will be generated, thereby ensuring that the punched product will not bend or deform, improving the work efficiency and product quality of the punching operation, allowing the product to be formed in one step with a high pass rate, reducing the number of processing steps, and ultimately achieving a high smoothness on the shear surface of the punched through hole, ensuring that there are no defects such as broken layers; secondly, by providing an upper die protruding tooth portion on the upper die, and providing a lower punching top pressing piece on the outer unloading plate, and providing a lower punching top pressing piece protruding tooth portion on the lower punching top pressing piece, the upper die protruding tooth portion and the lower punching top pressing piece protruding tooth portion can respectively abut against the upper and lower sides of the circumferential edge of the hole to be punched of the product and apply gear ring pressure, thereby having The material can be effectively pressed and the shearing area can be cut off, so as to further ensure the stability of the small gap blanking operation, the reliability of the blanking operation and the smoothness of the shearing surface. At the same time, the punching force of the punch, the gear ring pressure of the protruding teeth of the upper die and the protruding teeth of the lower punching top pressure part, and the counter-top pressure of the inner unloading plate work together to achieve efficient and stable blanking operation, ensure processing accuracy, and ensure product quality; thirdly, by adding positioning guide blocks and inner guide columns, efficient and accurate guiding and positioning effects for the movement of the upper die assembly, the lower die assembly and the outer unloading plate can be achieved, and multiple guiding and positioning can be achieved together with the column sleeve guide mechanism to ensure high precision of the stamping operation. The utility model has the advantages of high precision and excellent operation reliability, and can also ensure the small gap blanking; fourthly, by arranging a circle of upper die edge chamfering part at the bottom punching edge of the upper die, the opening of the upper die edge chamfering part can reduce the stress concentration at the edge of the upper die during the stamping process, thereby ensuring the working reliability of the upper die, being suitable for thick plate blanking, and improving its service life, while reducing the maintenance cost; finally, the structure of the utility model can improve the ordinary punching machine and can be used after adapting the corresponding components, thereby ensuring product quality and reducing the equipment procurement cost, having excellent applicability and considerable promotion significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0017] Figure 2 for Figure 1 An exploded view of the illustrated embodiment;

[0018] Figure 3 for Figure 1 a plan cross-sectional view of the illustrated embodiment;

[0019] Figure 4 for Figure 1 A schematic diagram of the three-dimensional structure of the outer unloading plate, the product, the upper die and the inner unloading plate in the illustrated embodiment.

[0020] In the figure: 1. upper die assembly, 11. upper die seat, 111. upper die seat platform plate, 112. upper die seat support plate, 113. upper die seat buffer limit plate, 12. upper die frame plate, 13. upper die pad, 14. upper die fixing plate, 15. upper die positioning plate, 151. upper die receiving hole; 2. lower die assembly, 21. lower die seat, 211. lower die seat platform plate, 212. lower die seat support plate, 22. lower die Frame plate, 23. Lower die pad, 231. Lower die pad clearance groove, 24. Lower die fixing plate, 241. Lower die fixing plate clearance groove, 25. Nitrogen spring, 26. Lower die adjustment gasket; 3. Column sleeve guide mechanism, 31. External guide column, 32. External guide sleeve; 4. External unloading plate, 41. Product limit plate, 42. Product positioning groove, 43. Lower punching top pressing piece, 431. Lower punching top pressing piece protruding tooth part, 44 .External discharge plate spring nail groove, 45.External discharge plate screw plug, 46.External discharge plate spring, 47.External discharge plate spring nail, 48.External discharge plate step groove; 5.Upper die, 51.Upper die protruding teeth, 52.Upper die matching hole, 53.Upper die connecting screw, 54.Upper die edge chamfering part; 6.Punch, 61.Punch base, 62.Punch module, 621.Punch hole; 7.Inner discharge plate, 71.Inner discharge Material plate limiting column, 72. Internal unloading plate body, 721. Internal unloading plate body spring nail groove, 73. Internal unloading plate screw plug, 74. Internal unloading plate spring, 75. Internal unloading plate spring nail; 8. Punching punch, 81. Punching punch connecting bolt; 9. Positioning guide block, 91. Positioning guide block fixing bolt, 92. Positioning guide block top matching part; 10. Internal guide column; 20. Product, 201. Product inner hole. DETAILED DESCRIPTION

[0021] The following will be described in detail in the form of embodiments, but the description of the embodiments is not a limitation of the scheme of the utility model. Any equivalent changes made based on the concept of the utility model that are merely formal but not substantial should be regarded as within the scope of the technical scheme of the utility model.

[0022] In the following description, all concepts related to up, down, left, right, front and back directions or orientations are for the current Figure 1 It refers to the position state, and therefore cannot be understood as a special limitation of the technical solution provided by the utility model.

[0023] See also Figures 1 to 4, shows a thick plate precision stamping processing die, including: an upper die assembly 1 and a lower die assembly 2, the upper die assembly 1 and the lower die assembly 2 are arranged opposite to each other up and down and the two can be relatively close to or relatively far away from each other, the upper die assembly 1 includes an upper die seat 11, an upper die frame plate 12, an upper die pad 13, an upper die fixing plate 14 and an upper die positioning plate 15 which are fixedly installed together from top to bottom, the upper die seat 11 is connected to an external power source and can be driven by the external power source to perform longitudinal reciprocating lifting and lowering motion to realize the movement of the upper die assembly 1, The lower die assembly 2 comprises a lower die base 21, a lower die frame plate 22, a lower die pad 23 and a lower die fixing plate 24 which are fixedly installed together from bottom to top. The lower die base 1 is fixedly installed on the machine tool; a plurality of column sleeve guide mechanisms 3, which are arranged between the upper die frame plate 12 and the lower die frame plate 22 to realize the sliding connection between the two. In this embodiment, the number of the column sleeve guide mechanisms 3 is four and they are arranged in a rectangular state at the four corners of the lower die frame plate 22; an outer unloading plate 4, which The stripper plate 4 is movably connected above the aforementioned lower die fixing plate 24 and positioned at the lower position of the aforementioned upper die assembly 1, and the outer stripper plate 4 can realize the bearing and positioning of the product to be stamped. A plurality of nitrogen springs 25 are also installed on the aforementioned lower die base 21. The plurality of nitrogen springs 25 sequentially pass through the aforementioned lower die frame plate 22, the lower die pad plate 23 and the lower die fixing plate 24 and support to the bottom of the aforementioned outer stripper plate 4; the aforementioned nitrogen spring 25 has excellent stability and a long service life. In the case of high-speed movement or severe vibration, the nitrogen spring The gas spring 25 can adjust its own air pressure to maintain the stability of the force on the outer unloading plate 4, and will not produce large errors due to changes in factors such as temperature and load. It will not have problems such as solid contact and wear due to friction like mechanical springs. It is more durable. The nitrogen spring 25 allows the outer unloading plate 4 to reliably and tightly abut the product against the lower position of the upper mold assembly 1 during the stamping operation, ensuring that each force can stably act on the product to perform stamping and forming of hole features, thereby improving the quality of punching work.

[0024] The aforementioned thick plate precision stamping processing mold also includes an upper die 5, which is positioned at the center position of the aforementioned upper die positioning plate 15 and connected to the lower position of the aforementioned upper die fixing plate 14, and an upper die protruding tooth portion 51 that is adapted to the outer peripheral shape of the hole type to be punched of the product is also formed on the downward side surface of the upper die 5; a punch 6, the aforementioned punch 6 is correspondingly arranged at the lower position of the aforementioned upper die 5, and the punch 6 is fixedly installed at the center position of the upper surface of the aforementioned lower die fixing plate 24 and passes through the aforementioned outer unloading plate 4 upward; an inner unloading plate 7, the inner unloading plate 7 is penetrated in the aforementioned upper die 5 and is correspondingly arranged in correspondence with the aforementioned punch 6; a punching punch 8, the punching punch 8 is used to punch the product and is connected to the lower position of the aforementioned upper die pad 13, the punching punch 8 is penetrated in the aforementioned inner unloading plate 7 and Its bottom end protrudes downward from the aforementioned inner unloading plate 7; a plurality of positioning guide blocks 9, a plurality of positioning guide blocks 9 are fixedly connected to the upper surface of the aforementioned lower mold frame plate 22 and are positioned at the circumferential edge of the aforementioned lower mold pad 23 and the lower mold fixing plate 24, and the top ends of the plurality of positioning guide blocks 9 can achieve sliding cooperation with the aforementioned outer unloading plate 4 and accurately position the movement of the aforementioned outer unloading plate 4, and the number of the aforementioned positioning guide blocks 9 is four and they are arranged in a rectangular shape on the aforementioned lower mold frame plate 22; a plurality of inner guide columns 10, a plurality of inner guide columns 10 are positioned on the aforementioned lower mold frame plate 22 and pass through the lower mold pad 23, the lower mold fixing plate 24 and the outer unloading plate 4 in sequence from bottom to top along the vertical direction and can penetrate into the aforementioned upper die positioning plate 15 to achieve sliding connection with it, so that the upper die positioning plate 15 and the aforementioned lower mold fixing plate 24 are slidably connected together.

[0025] This technical solution optimizes the overall structure: after the upper die assembly 1 and the lower die assembly 2 are closed, the product is pressed against the bottom of the upper die 5 by using the outer unloading plate 4 supported on the nitrogen spring 25, so that the product can be punched to the upper die 5 when the punch 6 and the inner unloading plate 7 are clamped, so as to achieve a small gap blanking operation for thick plate products, so that the transverse blanking gap between the upper die 5 and the punch 6 is about 0.5% of the thickness of the sheet to be punched, so that the punched sheet can always be kept perpendicular to the punching direction during the punching process; the reason for achieving small gap blanking is that the size of the gap during the blanking operation and its uniformity along the edge will directly affect the quality of the shear surface of the stamped part. Once the gap between the upper die 5 and the punch 6 is too large, the material in the deformation zone will be subjected to a large tensile effect and tensile stress will be generated at the same time, and tensile stress is the reason for inducing microcracks and tearing. Therefore, by achieving a small gap blanking operation, the bending deformation of the deformation zone is reduced and tensile stress is ensured not to be generated, thereby reducing the bending deformation of the punched product and improving the accuracy and reliability of the stamping operation.

[0026] It should be noted that: compared with the prior art which only sets a guide module corresponding to the column sleeve guide mechanism 3 of the utility model between the upper and lower dies, the technical solution provided by the utility model also adds a plurality of positioning guide blocks 9 and inner guide pillars 10. The inner guide pillars 10 can ensure the movement guidance between the lower die pad 23, the lower die fixed plate 24 and the outer unloading plate 4 and the upper die fixed plate 14 and the upper die positioning plate 15, and the aforementioned positioning guide blocks 9 can ensure the precise positioning of the upward movement of the aforementioned outer unloading plate 4, and prevent the movement of the outer unloading plate 4 from being offset due to the lateral force generated during the stamping process, thereby realizing multiple guiding positioning, ensuring the high precision of the stamping operation and excellent operational reliability, and further ensuring the realization of small gap blanking.

[0027] Please continue to see Figure 1 and Figure 2 The column sleeve guide mechanism 3 is provided with an outer guide column 31 extending in the vertical direction and an outer guide sleeve 32 arranged below the outer guide column 31. The top end of the outer guide column 31 is fixedly connected to the upper mold frame plate 12, and the outer guide sleeve 32 is fixedly connected to the lower mold frame plate 22 and the outer guide sleeve 32 is adapted to the outer guide column 31. The outer guide column 31 can penetrate into the outer guide sleeve 32 and slide with it, thereby realizing the positioning and sliding connection between the upper mold frame plate 12 and the lower mold frame plate 22, and when the upper mold assembly 1 is in the process of longitudinal lifting movement, the outer guide column 31 can reciprocate in the outer guide sleeve 32, thereby realizing the guidance of the movement of the upper mold assembly 1.

[0028] In this embodiment, the upper die base 11 includes an upper die base platform plate 111 arranged in the horizontal direction and a plurality of upper die base support plates 112 extending in a vertical state. The plurality of upper die base support plates 112 are fixedly connected to the lower position of the upper die base platform plate 111, and the bottom ends of the plurality of upper die base support plates 112 are fixedly connected to the upper die frame plate 12 through fasteners; and the upper die base 11 also includes an upper die base buffer limit plate 113 connected to the lower position of the upper die base platform plate 111. Plate 113 is arranged corresponding to the aforementioned internal unloading plate 7 and corresponds to the upper position of the internal unloading plate 7, and a plurality of internal unloading plate limiting columns 71 are also connected to the aforementioned internal unloading plate 7. The plurality of internal unloading plate limiting columns 71 pass through the upper mold fixing plate 14, the upper mold pad 13 and the upper mold frame plate 12 in sequence from bottom to top along the vertical direction, and the top end portion of the aforementioned internal unloading plate limiting column 71 can be abutted against the aforementioned upper mold seat buffer limiting plate 113, and the aforementioned upper mold seat buffer limiting plate 113 can realize the upward buffer limit for the internal unloading plate 71.

[0029] Furthermore, the lower die assembly 2 further comprises a plurality of lower die adjustment gaskets 26 arranged on the upper side surface of the lower die fixing plate 24, the lower die adjustment gaskets 26 are installed between the lower die fixing plate 24 and the outer unloading plate 4, and the punch 6 passes through the lower die adjustment gaskets 26, and the lower die adjustment gaskets 26 can protect the punch 6 during the mold verification, and can ensure that the lower die assembly 2 is in a pressed state as a whole, so that the upper die protruding tooth portion 51 can be pressed to a predetermined depth of the product to be stamped; the lower die seat 21 comprises a There is a lower die base platform plate 211 arranged in the horizontal direction and a plurality of lower die base support plates 212 extending in the vertical direction, the plurality of lower die base support plates 212 are fixedly connected at the upper position of the lower die base platform plate 211, and the top ends of the plurality of lower die base support plates 212 are connected and fixed together with the lower die frame plate 22 through fasteners; and the plurality of nitrogen springs 25 are installed on the lower die base platform plate 211, and the bottom ends of the nitrogen springs 25 are fixedly connected with the lower die base platform plate 211 through a plurality of fasteners.

[0030] In this embodiment, an upper die accommodating hole 151 matching the shape of the upper die 5 is provided at the center of the upper die positioning plate 15, and the upper die 5 is positioned and installed in the upper die accommodating hole 151; an upper die matching hole 52 penetrating the thickness direction of the upper die 5 is provided, and the upper die matching hole 52 matches the shape of the internal unloading plate 7, and the internal unloading plate 7 is matched and installed in the upper die matching hole 52 and passes through the upper die 5 downward; and the upper die 5 is also provided with a plurality of upper die connecting holes extending upward. Connecting screws 53, multiple upper die connecting screws 53 are inserted into the upper die fixing plate 14 and are threadedly connected with the corresponding screw holes on the upper die fixing plate 14, so that the upper die 5 is fixedly connected to the upper die fixing plate 14; and a circle of upper die cutting edge chamfering portion 54 is formed at the circumferential edge portion of the bottom end of the upper die matching hole 52 of the upper die 5, that is, at its stamping cutting edge. The opening of the upper die cutting edge chamfering portion 54 can reduce the stress concentration at the cutting edge of the upper die 5 during operation, ensure the working reliability of the upper die 5, and improve its service life.

[0031] See also Figure 2 and Figure 3 And focus on combining Figure 4The inner unloading plate 7 also includes an inner unloading plate body 72; and a plurality of inner unloading plate body spring nail grooves 721 are provided in the inner unloading plate body 72 and extend in the height direction thereof, the bottom ends of the inner unloading plate body spring nail grooves 721 are communicated with the bottom surface of the inner unloading plate body 72, and the inner unloading plate screw plug 73, the inner unloading plate spring 74 and the inner unloading plate spring nail 75 are sequentially provided in the inner unloading plate body spring nail grooves 721 from top to bottom, and the inner unloading plate body spring nail 75 is sequentially provided in the inner unloading plate body spring nail grooves 721 from top to bottom. The unloading plate screw plug 73 is installed at the upper position of the aforementioned inner unloading plate body spring pin groove 721, and the aforementioned inner unloading plate spring 74 abuts against the bottom of the inner unloading plate screw plug 73. The aforementioned inner unloading plate spring pin 75 passes downward through the aforementioned inner unloading plate body spring pin groove 721, and the inner unloading plate spring 74 can apply a downward force to the aforementioned inner unloading plate spring pin 75, so that the inner unloading plate spring pin 75 can press downward to form a hole in the product to be punched.

[0032] In this embodiment, the punching punch 8 is cylindrical in shape, and the punching punch 8 passes through the inner unloading plate body 72 to achieve a mating connection therewith; and a punching punch connecting bolt 81 is also provided on the punching punch 8, and the punching punch connecting bolt 81 passes through the height direction of the punching punch 8 along the vertical direction, and the punching punch connecting bolt 81 is inserted into the upper die pad 13 and is threadedly connected with the corresponding screw hole on the upper die pad 13, so that the punching punch 8 is fixedly connected to the upper die pad 13.

[0033] Furthermore, a pair of product limiting plates 41 arranged in a spaced state are provided on the upper side surface of the aforementioned outer unloading plate 4, and a product positioning groove 42 adapted to the shape of the product to be punched is formed between the two product limiting plates 41, and the product positioning groove 42 is used to position the product to be punched and allow the product to be punched to move therein; and a lower punching top pressing piece 43 is fixedly installed on the aforementioned outer unloading plate 4 and corresponding to the product positioning groove 42, and the lower punching top pressing piece 43 is arranged at a position below the aforementioned upper die 5, and a lower punching top pressing piece protruding tooth portion is convexly provided on the upper side surface of the lower punching top pressing piece 43 431, the protruding teeth portion 431 of the lower punching pressing piece corresponds to the aforementioned protruding teeth portion 51 of the upper die, and the protruding teeth portion 431 of the lower punching pressing piece is adapted to the peripheral shape of the hole type to be punched of the product, and the protruding teeth portion 431 of the lower punching pressing piece can abut against the surface portion of the product to be punched facing downward. During the punching operation, when the upper die assembly 1 and the lower die assembly 2 are closed, the aforementioned protruding teeth portion 51 of the upper die and the protruding teeth portion 431 of the lower punching pressing piece can respectively abut against the upper and lower sides of the circumferential edge portion of the hole type to be punched of the product, and the aforementioned protruding teeth portion 51 of the upper die and the protruding teeth portion 431 of the lower punching pressing piece can apply gear ring pressure to the product to ensure the pressure effect The effect and processing quality are improved to achieve efficient and stable stamping of thick plate products, thereby improving the stamping efficiency of thick plate products; and the aforementioned outer unloading plate 4 is also provided with a plurality of outer unloading plate spring nail grooves 44 that penetrate the thickness direction of the plate body, and the plurality of aforementioned outer unloading plate spring nail grooves 44 correspond to the lower position of the aforementioned product positioning groove 42, and the aforementioned outer unloading plate spring nail groove 44 is provided with an outer unloading plate screw plug 45, an outer unloading plate spring 46 and an outer unloading plate spring nail 47 from bottom to top in sequence, the aforementioned outer unloading plate screw plug 45 is installed at the bottom position of the aforementioned outer unloading plate spring nail groove 44, and the aforementioned outer unloading plate spring 46 is arranged above the outer unloading plate screw plug 45, and the aforementioned The outer unloading plate spring pin 47 passes through the outer unloading plate body spring pin groove 44 upward and abuts against the lower surface of the product to be punched, and the outer unloading plate spring pin 47 can apply an upward force to the outer unloading plate spring pin 47, so that the outer unloading plate spring pin 47 can slightly lift the product to be punched upward. Specifically, when performing the punching operation, it is necessary to punch multiple holes on the sheet of the product to be punched. Since the sheet is heavy, the product sheet needs to slide in the product positioning groove 42 of the outer unloading plate 4 after punching a hole. The outer unloading plate spring pin 47 slightly lifts the product sheet to be punched to avoid direct friction between the product sheet and the outer unloading plate 4 to produce chips and affect production.

[0034] Please refer to Figure 2The punch 6 is provided with a punch base 61 and a convex module 62 formed on the punch base 61; wherein the punch base 61 is fixedly mounted at the center position of the upper surface of the lower die fixing plate 24, the convex module 62 is extended upward and passes through the outer unloading plate 4 and the lower punching pressing member 43 upward, and the shape of the convex module 62 is the same as that of the inner unloading plate 7, and a punch hole 621 is also provided on the concave module 62 to penetrate the height direction thereof, the shape of the punch hole 621 is adapted to the shape of the punching punch 8, and the punching punch 8 can be inserted into the punch hole 621, and the punch hole 621 can be used for the passage of stamping waste.

[0035] Furthermore, a plurality of the aforementioned positioning guide blocks 9 are provided with a plurality of positioning guide block fixing bolts 91, and the plurality of positioning guide block fixing bolts 91 pass through the height direction of the positioning guide block 9 along the vertical direction and penetrate into the aforementioned lower mold frame plate 22, and the plurality of positioning guide block fixing bolts 91 are threadedly connected with the corresponding screw holes opened on the lower mold frame plate 22, so that the positioning guide block 9 is fixedly connected to the aforementioned lower mold frame plate 22; and a lower mold pad plate giving way groove 231 and a lower mold fixing plate giving way groove 241 are respectively opened at the circumferential edge position of the aforementioned lower mold pad plate 23 and the lower mold fixing plate 24, and the shapes of the aforementioned lower mold pad plate giving way groove 231 and the lower mold fixing plate giving way groove 241 are both adapted to the outer peripheral shape of the aforementioned positioning guide block 9, so that the positioning guide block 9 can be positioned and set at the circumferential edge of the aforementioned lower mold pad plate 23 and the lower mold fixing plate 24; a convex A top fitting portion 92 of a positioning guide block is formed, and a corresponding outer unloading plate step groove 48 is formed at the circumferential edge of the upper surface of the outer unloading plate 4. The top fitting portion 92 of the positioning guide block can be fitted and connected in the outer unloading plate step groove 48 and slide therein, thereby realizing the positioning and guiding of the outer unloading plate 4 by the positioning guide block 9. Through the fitting connection between the top fitting portion 92 of the positioning guide block and the outer unloading plate step groove 48, the positioning guide block 9 can accurately and reliably position the outer unloading plate 4, the lower die pad 23 and the lower die fixed plate 24, and prevent the outer unloading plate 4, the lower die pad 23 and the lower die fixed plate 24 from being offset due to the generation of lateral force during the stamping process. The positioning guide block 9 and the inner guide column 10 can also realize reliable guiding of the upper die assembly 1, the lower die assembly 2 and the outer unloading plate 4 under the condition of long-term operation, thereby ensuring the accuracy and reliability of long-term operation.

[0036] See also Figures 1 to 4 , the applicant briefly describes the working principle of the technical solution provided by the utility model: Figure 2 , Figure 3 and Figure 4A thick plate product 20 is also shown in the figure, and a plurality of product inner holes 201 that have been punched are also shown on the product 20; and in the process of punching and cutting the inner holes 201 of the product, the upper die assembly 1 is first controlled by an external power source to move upward, so that the upper die assembly 1 and the lower die assembly 2 are relatively far apart to achieve the opening and closing of the mold, and then the product 20 is transported to the product positioning groove 42 of the outer unloading plate 4, and then the upper die assembly 1 is lowered, so that the upper die assembly 1 and the lower die assembly 2 are relatively close to each other and the mold is closed. At this time, the outer unloading plate 4 presses the raw material upward under the upper die 5 with the upper die protruding tooth portion 51 under the action of the nitrogen spring 25, and the outer unloading plate spring nail 47 further presses the product 20 upward, and at the same time, the inner unloading plate 7 applies a counter-pressing pressure to the product 20, and at the same time, the upper die protruding tooth portion 51 and the lower punching top pressing member protruding tooth portion 431 can apply the punching force to the product 20. The gear ring pressure on the circumference of the inner hole is used to punch the product 20 onto the upper die 5 while being clamped by the punch 6 and the inner unloading plate 7. The waste material in the inner hole is punched into the punch hole 621 of the punch 6 under the action of the punch 8. Then the upper die assembly 1 is moved upward to open the die. The gear ring pressure on the protruding tooth portion 51 of the upper die acts as a unloading force to remove the overlapping waste material in the inner hole 201 of the product, and the counter-top pressure on the inner unloading plate 7 acts as an ejection force to eject the product 20 from the upper die 5, completing the punching action. The material is fed again to realize the reciprocating action, thereby achieving an efficient and reliable small gap punching and stamping action for the product 20. At the same time, the punching pressure, gear ring pressure, and counter-top pressure can work together to act on the product 20, thereby effectively reducing the bending deformation of thick plate products, and ensuring that the shear surface of the stamping forming is smooth and has no defects such as fracture layer. While ensuring product quality, it can also effectively improve production efficiency.

[0037] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred implementations of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.

[0038] In summary, the technical solution provided by the utility model makes up for the shortcomings of the existing technology, successfully completes the invention task, and faithfully realizes the technical effects stated by the applicant in the technical effect column above.

Claims

1. A thick plate precision stamping die, characterized in that: include: An upper die assembly (1) and a lower die assembly (2), wherein the upper die assembly (1) and the lower die assembly (2) are arranged relative to each other in the upper and lower parts and can be relatively close to or relatively far from each other, wherein the upper die assembly (1) comprises an upper die seat (11), an upper die frame plate (12), an upper die pad plate (13), an upper die fixing plate (14) and an upper die positioning plate (15) which are fixedly installed together from top to bottom, and the lower die assembly (2) comprises a lower die seat (21), a lower die frame plate (22), a lower die pad plate (23) and a lower die fixing plate (24) which are fixedly installed together from bottom to top; and a plurality of column sleeve guide mechanisms (3), wherein the column sleeve guide mechanisms (3) The upper die frame plate (12) and the lower die frame plate (22) are arranged between the upper die frame plate (12) and realize the sliding connection between the two; an external stripper plate (4), which is movably connected to the upper part of the lower die fixed plate (24) and is positioned at the lower position of the upper die assembly (1), and the external stripper plate (4) can realize the bearing and positioning of the product to be stamped. A plurality of nitrogen springs (25) are also installed on the lower die seat (21), and the plurality of nitrogen springs (25) pass through the lower die frame plate (22), the lower die pad plate (23) and the lower die fixed plate (24) in sequence and are supported to the bottom of the external stripper plate (4); an upper concave die (5), the upper concave die (5 ) is positioned and arranged at the center position of the upper die positioning plate (15) and connected to the lower position of the upper die fixing plate (14), and an upper die protruding tooth portion (51) adapted to the outer peripheral shape of the punching inner hole of the product is also formed on the downward side surface of the upper die (5); a punch (6), the punch (6) is correspondingly arranged at the lower position of the upper die (5), and the punch (6) is fixedly installed at the center position of the upper surface of the lower die fixing plate (24) and passes through the outer unloading plate (4) upward; an inner unloading plate (7), the inner unloading plate (7) is passed through the upper die (5) and is opposite to the punch (6) It should be provided with: a punching punch (8), which is used for punching holes in the product and is connected to the lower position of the upper die pad (13), the punching punch (8) is inserted into the inner unloading plate (7) and its bottom end protrudes downward from the inner unloading plate (7); a plurality of positioning guide blocks (9), the plurality of positioning guide blocks (9) are fixedly connected to the upper surface of the lower die frame plate (22) and are positioned at the circumferential edge of the lower die pad (23) and the lower die fixed plate (24), and the top ends of the plurality of positioning guide blocks (9) can realize sliding cooperation with the outer unloading plate (4) and accurately position the outer unloading plate (4);A plurality of inner guide pillars (10), the plurality of inner guide pillars (10) are positioned on the lower die frame plate (22) and sequentially pass through the lower die pad plate (23), the lower die fixing plate (24) and the outer stripper plate (4) from bottom to top along the vertical direction and can be inserted into the upper die positioning plate (15) to achieve sliding connection therewith, so that the upper die positioning plate (15) and the lower die fixing plate (24) are slidably connected together. ; 2. A thick plate precision stamping die according to claim 1, characterized in that: The column sleeve type guide mechanism (3) comprises an outer guide column (31) extending in a vertical direction and an outer guide sleeve (32) arranged below the outer guide column (31); the top end of the outer guide column (31) is fixedly connected to the upper mold frame plate (12), while the outer guide sleeve (32) is fixedly connected to the lower mold frame plate (22) and the outer guide sleeve (32) is matched with the outer guide column (31); the outer guide column (31) can penetrate into the outer guide sleeve (32) and achieve sliding cooperation therewith, thereby achieving the positioning sliding connection between the upper mold frame plate (12) and the lower mold frame plate (22).

3. A thick plate precision stamping die according to claim 2, characterized in that: The upper die base (11) comprises an upper die base platform plate (111) arranged in a horizontal direction and a plurality of upper die base support plates (112) extending in a vertical state, wherein the plurality of upper die base support plates (112) are fixedly connected to a position below the upper die base platform plate (111), and the bottom ends of the plurality of upper die base support plates (112) are fixedly connected to the upper die frame plate (12) via fasteners; and the upper die base (11) further comprises an upper die base buffer limit plate ( 113), the upper die seat buffer limit plate (113) is arranged corresponding to the inner unloading plate (7) and corresponds to the upper position of the inner unloading plate (7), and a plurality of inner unloading plate limit columns (71) are also connected to the inner unloading plate (7), and the plurality of inner unloading plate limit columns (71) pass through the upper die fixing plate (14), the upper die pad (13) and the upper die frame plate (12) in sequence from bottom to top along the vertical direction, and the top end of the inner unloading plate limit column (71) can be abutted against the upper die seat buffer limit plate (113).

4. A thick plate precision stamping die according to claim 1, characterized in that: The lower die assembly (2) further comprises a plurality of lower die adjustment gaskets (26) arranged on a side surface of the lower die fixing plate (24) facing upward, and the lower die adjustment gaskets (26) are installed between the lower die fixing plate (24) and the outer unloading plate (4); the lower die base (21) comprises a lower die base platform plate (211) arranged along the horizontal direction and a plurality of lower die base support plates (212) extending along the vertical direction, the plurality of lower die base support plates (212) are fixedly connected to the upper position of the lower die base platform plate (211), and the top ends of the plurality of lower die base support plates (212) are connected and fixed to the lower die frame plate (22) through fasteners; and the plurality of nitrogen springs (25) are installed on the lower die base platform plate (211), and the bottom ends of the nitrogen springs (25) are fixedly connected to the lower die base platform plate (211) through a plurality of fasteners.

5. The thick plate precision stamping die according to claim 1, characterized in that: An upper die accommodating hole (151) matching the shape of the upper die (5) is provided at the center of the upper die positioning plate (15), and the upper die (5) is positioned and installed in the upper die accommodating hole (151); and an upper die matching hole (52) penetrating the thickness direction of the upper die (5) is provided in the upper die matching hole (52), matching the shape of the inner unloading plate (7), and the inner unloading plate (7) is matched and installed in the upper die matching hole (52) and passes downward through the upper die. The upper die (5) is provided with a plurality of upper die connecting screws (53) extending upward, the plurality of upper die connecting screws (53) are inserted into the upper die fixing plate (14) and are threadedly connected with the corresponding screw holes on the upper die fixing plate (14), so that the upper die (5) and the upper die fixing plate (14) are fixedly connected; and a circle of upper die cutting edge chamfering portion (54) is formed at the axial edge portion of the bottom end of the upper die matching hole (52) of the upper die (5).

6. A thick plate precision stamping die according to claim 1, characterized in that: The inner unloading plate component (7) further comprises an inner unloading plate body (72); and a plurality of inner unloading plate body spring nail grooves (721) penetrating the inner unloading plate body (72) in its height direction are provided in the inner unloading plate body (72); the bottom end of the inner unloading plate body spring nail groove (721) is communicated with the bottom surface of the inner unloading plate body (72); the inner unloading plate body spring nail groove (721) is provided with an inner unloading plate component screw plug (73), an inner unloading plate component spring (74) and an inner unloading plate component spring nail (75) in sequence from top to bottom; The inner unloading plate screw plug (73) is installed at the upper position of the inner unloading plate body spring pin groove (721), and the inner unloading plate spring (74) is abutted against the bottom of the inner unloading plate screw plug (73). The inner unloading plate spring pin (75) passes downward through the inner unloading plate body spring pin groove (721), and the inner unloading plate spring (74) can apply a downward force to the inner unloading plate spring pin (75), so that the inner unloading plate spring pin (75) can press downward the hole material of the product to be punched.

7. A thick plate precision stamping die according to claim 6, characterized in that: The punching punch (8) is cylindrical in shape, and the punching punch (8) passes through the inner discharge plate body (72) and is connected thereto in a mating relationship; a punching punch connecting bolt (81) is also provided on the punching punch (8), and the punching punch connecting bolt (81) passes through the height direction of the punching punch (8) along the vertical direction, and the punching punch connecting bolt (81) penetrates into the upper die pad (13) and is threadedly connected with the corresponding screw hole on the upper die pad (13), so that the punching punch (8) is fixedly connected to the upper die pad (13).

8. The thick plate precision stamping die according to claim 1, characterized in that: A pair of product limiting plates (41) arranged in a spaced-apart manner are provided on the upper side surface of the outer unloading plate (4), and a product positioning groove (42) adapted to the shape of the product to be punched is formed between the two product limiting plates (41), and the product positioning groove (42) is used to position the product to be punched and allow the product to be punched to move therein; and a lower punching pressing piece is fixedly installed on the outer unloading plate (4) and in the corresponding product positioning groove (42). (43), the lower punching pressing piece (43) is arranged at a position below the upper die (5), and a lower punching pressing piece protruding tooth portion (431) is convexly provided on the upper side surface of the lower punching pressing piece (43), the lower punching pressing piece protruding tooth portion (431) corresponds to the upper die protruding tooth portion (51), and the lower punching pressing piece protruding tooth portion (431) is adapted to the outer peripheral shape of the punching inner hole of the product, and the lower punching pressing piece protruding tooth portion (431) can abut against The outer stripper plate (4) is provided with a plurality of outer stripper plate spring nail grooves (44) extending through the thickness direction of the plate body, and the plurality of outer stripper plate spring nail grooves (44) correspond to the lower position of the product positioning groove (42). The outer stripper plate spring nail grooves (44) are provided with an outer stripper plate screw plug (45), an outer stripper plate spring (46) and an outer stripper plate spring nail (47) in sequence from bottom to top. The outer stripper plate screw plug (45) ) is installed at the bottom position of the outer unloading plate spring nail groove (44), and the outer unloading plate spring (46) is arranged above the outer unloading plate screw plug (45). The outer unloading plate spring nail (47) passes through the outer unloading plate body spring nail groove (44) upward and abuts against the lower surface of the product to be stamped, and the outer unloading plate spring (46) can apply an upward force to the outer unloading plate spring nail (47), so that the outer unloading plate spring nail (47) can press the product to be stamped upward.

9. A thick plate precision stamping die according to claim 8, characterized in that: The punch (6) comprises a punch base (61) and a convex module (62) formed on the punch base (61); wherein the punch base (61) is fixedly mounted at the center position of the upper surface of the lower die fixing plate (24); the convex module (62) is extended upward and passes through the outer unloading plate (4) plate body and the lower punching pressing member (43) upward; the shape of the convex module (62) is the same as that of the inner unloading plate (7); and a punch hole (621) is also provided on the convex module (62) which passes through the height direction thereof; the shape of the convex hole (621) is compatible with the shape of the punching punch (8), and the punching punch (8) can be inserted into the convex hole (621).

10. The thick plate precision stamping die according to claim 1, characterized in that: A plurality of positioning guide block fixing bolts (91) are provided in each of the plurality of positioning guide blocks (9). The plurality of positioning guide block fixing bolts (91) pass through the height direction of the positioning guide block (9) along the vertical direction and penetrate into the lower mold frame plate (22). The plurality of positioning guide block fixing bolts (91) are threadedly connected with corresponding screw holes on the lower mold frame plate (22), so that the positioning guide block (9) and the lower mold frame plate (22) are fixedly connected. A lower mold pad plate paving groove (231) and a lower mold fixed plate paving groove (241) are respectively provided at the circumferential edge positions of the lower mold pad plate (23) and the lower mold fixed plate (24). The lower mold pad plate paving groove (231) The shape of the lower die fixing plate's yielding groove (241) is adapted to the outer peripheral shape of the positioning guide block (9), so that the positioning guide block (9) can be positioned and set at the circumferential edge of the lower die pad (23) and the lower die fixing plate (24); a positioning guide block top end fitting portion (92) is also convexly formed at the top end of the positioning guide block (9), and an outer unloading plate step groove (48) is correspondingly formed at the circumferential edge of the upper surface of the outer unloading plate (4), and the positioning guide block top fitting portion (92) can be matched and connected in the outer unloading plate step groove (48), thereby realizing the positioning and guiding of the positioning guide block (9) to the outer unloading plate (4).

Images