Belleville spring stamping die

Abstract

The utility model relates to the technical field of stamping, in particular to a belleville spring stamping die. The belleville spring comprises an annular body, an inner hole is formed in the annular body, a set of tooth parts arranged at intervals are arranged on the inner hole in the radial direction in a protruding mode, a center hole is defined by the ends of the set of tooth parts in the circumferential direction, a notch part is arranged between a pair of tooth parts adjacent in the circumferential direction, and the notch part is composed of a set of first notch parts and a set of second notch parts. The first notch parts and the second notch parts are arranged in the circumferential direction in a staggered mode one by one, the pair of tooth-shaped punches on the die is used for directly and sequentially punching the metal strip twice, then the center hole punch and the outer edge punch are used for sequentially punching the metal strip, the needed belleville spring is finally formed, heat treatment does not need to be conducted on the belleville spring in the follow-up process, and the production efficiency is improved. Deformation of the belleville spring in the heat treatment machining process is fundamentally eliminated, the yield of the belleville spring is increased, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping processing, in particular to a disc spring stamping die. Background Art

[0002] The disc spring is in the shape of a conical disc. Usually, the process flow of the disc spring is: blanking → punching the inner diameter → punching the outer diameter → forming → heat treatment. During the heat treatment process, the formed disc spring needs to be heated, quenched and tempered. Since the disc spring is generally a metal product, such treatment may cause the disc spring to deform due to temperature stress, resulting in the scrapping of the disc spring.

[0003] like Figure 1 As shown, the disc spring 2 corresponding to the present application includes an annular main body 3, an inner hole 30 is provided on the annular main body 3, a group of teeth 31 arranged at intervals protrude in the radial direction of the inner hole 30, a group of teeth 31 ends are circumferentially surrounded by a center hole 310, and a notch 311 is provided between a pair of circumferentially adjacent teeth 31. For such a disc spring with a complex structure, if the traditional production process is used to stamp the entire disc spring at one time, it is easy to cause damage to the teeth and the connection points between the teeth and the annular main body, resulting in the scrapping of the disc spring and increasing the production cost of the disc spring. Therefore, a stamping die is needed to improve the yield rate of the disc spring and reduce its production cost. Utility Model Content

[0004] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a disc spring stamping die, which solves the technical problems of low disc spring yield and high production cost.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A disc spring stamping die, used for stamping out a disc spring on a metal strip, characterized in that: the disc spring comprises an annular body, an inner hole is provided on the annular body, a group of teeth portions arranged at intervals protrude in the radial direction of the inner hole, a group of teeth portions ends circumferentially surround a center hole, a notch is provided between a pair of circumferentially adjacent teeth portions, the notch consists of a group of first notches and a group of second notches, the first notches and the second notches are staggered one by one in the circumferential direction, comprising: an upper die assembly and a lower die assembly, the A group of punches are provided on the side of the upper die assembly near the lower die assembly, corresponding to the feeding direction of the metal strip. The group of punches includes a pair of toothed punches, a center hole punch, and an outer edge punch in sequence. The shapes of the pair of toothed punches correspond to the first notch and the second notch respectively, the shape of the center hole punch corresponds to the center hole, the outer edge punch corresponds to the outer edge of the annular body, and the end of the outer edge punch is provided with a disc-shaped protrusion adapted to the disc spring. A group of concave dies are provided on the side of the lower die assembly near the upper die assembly, and the concave dies correspond to the punches one by one.

[0007] Based on the above structure, a disc spring stamping die of the present application first feeds the metal strip into the die from the feed direction, first uses a toothed punch to stamp the metal strip for the first time to form a first notch on the metal strip, then uses another toothed punch to stamp the metal strip for the second time to form a second notch on the metal strip, then uses a center hole punch to stamp the metal strip for the third time to form a center hole on the metal strip, and finally uses an outer edge punch to stamp the metal strip for the fourth time. The disc-shaped protrusion fits with the metal strip to shape the disc spring in three dimensions, and makes the disc spring separate from the metal strip, completing the processing and forming of the metal strip, and the corresponding punch can be inserted into the die.

[0008] Furthermore, in a disc spring stamping die in the present application, a group of the punches also includes a group of positioning hole punches, corresponding to the feeding direction of the metal strip, the positioning hole punches are arranged in front of the toothed punch, a group of the punches respectively correspond to a group of stamping stations, the interval distance between each stamping station is an integer multiple of a, a is the step distance of each feeding movement of the metal strip, and each stamping station on the rear side of the positioning hole punch is provided with a positioning convex portion corresponding to the positioning hole punch, the positioning convex portion is arranged on the upper die assembly, and a group of positioning concave portions are provided on the side of the lower die assembly near the upper die assembly, and the positioning concave portions correspond to the positioning convex portions one by one. As a preferred embodiment of the present application, the positioning convex portion and the positioning hole punch in a disc spring stamping die of the present application have the same position relative to the stamping station, and the positioning hole punch is used to punch out positioning holes on the metal strip to provide positioning for subsequent stamping processes and prevent the metal strip from shifting. Each time the metal strip is fed into each stamping station, during the mold closing process, the positioning protrusion extends into the positioning hole on the metal strip to position the metal strip to ensure the accuracy of the stamping position, and the positioning recess can be inserted into the corresponding positioning protrusion.

[0009] Furthermore, in a disc spring stamping die in the present application, the punch and the positioning convex part can be detachably mounted on the upper die assembly. As a preferred solution of the present application, the punch and the positioning convex part in a disc spring stamping die in the present application can be detachably mounted on the upper die assembly, so that when the punch and the positioning convex part are worn and damaged, they can be repaired and replaced in time without replacing the entire upper die assembly, thereby improving the economy of the die.

[0010] Furthermore, a disc spring stamping die in the present application, the upper die assembly includes: an upper die plate, a punch seat is embedded in the upper die plate, the toothed punch includes a group of punch core parts, the shape of the punch core parts corresponds to the missing part, a limiting convex is provided on the end of the punch core parts away from the lower die assembly, a core part mounting countersunk hole adapted to the punch core part is provided on the punch seat, the punch core part is installed in the core part mounting countersunk hole, a clamping convex is extended from the side of the punch seat away from the lower die assembly, and a mounting groove adapted to the clamping convex is provided on the side of the upper die plate away from the lower die assembly. As a preferred embodiment of the present application, a group of punch core parts in a disc spring stamping die of the present application adopts a split design. If individual punch core parts are worn and damaged, there is no need to replace the entire toothed punch. The punch core parts are installed in the core part mounting countersunk holes, and the core part mounting countersunk holes limit the punch core parts so that the punch core parts are locked on the punch seat. The punch seat needs to be used in conjunction with the punch core parts. The split design with the upper die assembly is for the purpose that when the internal missing part of the disc spring changes later, only the punch seat and the punch core parts matching the punch seat need to be replaced, instead of replacing the entire upper die plate, thereby improving the economy of the die. The cam is used to limit the punch seat so that the punch seat is locked on the upper die plate.

[0011] Furthermore, in a disc spring stamping die in the present application, a group of template positioning protrusions are provided on the side of the lower die assembly near the upper die assembly, and a group of template positioning recesses corresponding to the template positioning protrusions are provided on the side of the upper die assembly near the lower die assembly, and the template positioning protrusions are detachably mounted on the lower die assembly. As a preferred embodiment of the present application, the template positioning protrusions in a disc spring stamping die in the present application are used to position the upper die assembly and the lower die assembly during the stamping process, and the template positioning recesses can be used for the corresponding template positioning protrusions to extend into, and the template positioning protrusions are detachably mounted on the lower die assembly. When the template positioning protrusions are worn or damaged, they can be repaired and replaced in time without replacing the entire lower die assembly, thereby improving the economy of the die.

[0012] Furthermore, in a disc spring stamping die in the present application, a blanking through hole is provided at the bottom of the concave die corresponding to the toothed punch, the center hole punch, and the positioning hole punch. As a preferred embodiment of the present application, the blanking through hole in a disc spring stamping die in the present application is used to discharge waste material punched out by the toothed punch, the center hole punch, and the positioning hole punch during the stamping process.

[0013] Furthermore, in a disc spring stamping die in the present application, the bottom of the die corresponding to the outer edge punch is a disc-shaped concave surface, and the disc-shaped concave surface corresponds to the disc-shaped protrusion. As a preferred embodiment of the present application, in a disc spring stamping die in the present application, the bottom of the die corresponding to the outer edge punch is a disc-shaped concave surface, which is used to support the disc spring during the stamping process and perform three-dimensional shaping on the disc spring.

[0014] Furthermore, in a disc spring stamping die in the present application, the lower die assembly is provided with a group of grooves corresponding to the die, the lower die assembly is provided with a group of locking screws, the locking screws are arranged near the edges of the grooves, the locking screws include a screw head embedded in the lower die assembly, and the screw head extends to the inside of the die. As a preferred embodiment of the present application, the locking screws in a disc spring stamping die in the present application are used to limit the die, so that the die can be detachably mounted on the lower die assembly, and the die is mounted in the corresponding groove.

[0015] Furthermore, in a disc spring stamping die in the present application, the upper die assembly further comprises: a sandwich plate, the positioning protrusion is provided with a limiting shaft and a limiting protrusion in sequence on the side away from the lower die assembly, the limiting shaft is passed through the upper die plate, and the limiting protrusion is embedded on the side of the upper die plate near the sandwich plate. As a preferred embodiment of the present application, the limiting protrusion in a disc spring stamping die in the present application is used to limit the limiting shaft so that the limiting shaft is locked on the upper die plate, and the sandwich plate is used to resist the limiting protrusion to prevent the positioning protrusion from shifting during the stamping process.

[0016] It can be seen from the above technical solution that the utility model has the following beneficial effects:

[0017] The utility model provides a disc spring stamping die, which directly stamps the metal strip twice in sequence by splitting a pair of toothed punches in the stamping die, and then stamps the metal strip in sequence through the center hole punch and the outer edge punch, and finally forms the required disc spring. In addition, the stamping die in the present application directly stamps the metal strip multiple times, and there is no need to perform heat treatment on the disc spring later, which also fundamentally eliminates the deformation of the disc spring during the heat treatment process, thereby improving the disc spring yield rate and reducing its production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A plan view of a disc spring corresponding to a disc spring stamping die in an embodiment of the present application;

[0019] Figure 2 This is a vertical view of a disc spring corresponding to a disc spring stamping die in an embodiment of the present application;

[0020] Figure 3 A plan view of a metal strip corresponding to a disc spring stamping die in an embodiment of the present application;

[0021] Figure 4 This is a schematic diagram of the three-dimensional structure of a disc spring stamping die in an embodiment of the present application;

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of an upper die assembly of a disc spring stamping die in an embodiment of the present application;

[0023] Figure 6 A rear view of an upper die assembly of a disc spring stamping die in an embodiment of the present application;

[0024] Figure 7 for Figure 6 A partial enlarged view of the area A in the middle circle;

[0025] Figure 8 for Figure 6 3D cross-sectional view of the middle BB section;

[0026] Fig. 9 for Figure 6 Cross-sectional view of the middle CC section;

[0027] Fig.10 for Figure 6 Middle DD section cutaway view;

[0028] Fig.11 This is a schematic diagram of the three-dimensional structure of a lower die assembly of a disc spring stamping die in an embodiment of the present application;

[0029] Fig.12 This is a rear view of a lower die assembly of a disc spring stamping die in an embodiment of the present application;

[0030] Fig.13 This is a schematic diagram of the three-dimensional structure of a groove of a disc spring stamping die in an embodiment of the present application.

[0031] In the figure: 1-metal strip; 2-disc spring; 3-annular body; 30-inner hole; 31-tooth portion; 310-center hole; 3111-first notch; 3112-second notch; 4-upper die assembly; 41-upper die plate; 411-positioning convex portion; 412-limiting shaft; 413-limiting convex portion; 414-punch seat; 4141-core mounting countersunk hole; 4142-card convex portion; 415-die plate positioning concave portion ;416-installation slot;42-sandwich plate;43-top support plate;5-lower die assembly;51-die;52-positioning recess;53-template positioning convex portion;54-blanking through hole;55-groove;56-locking screw;6-punch;61-toothed punch;611-punch core;6111-limiting convex;62-center hole punch;63-outer edge punch;631-dish-shaped protrusion;64-positioning hole punch. DETAILED DESCRIPTION Example

[0032] like Figure 1 , 2 As shown in Figures 3, 4, 5 and 11, a disc spring stamping die is used to stamp out a disc spring 2 on a metal strip 1, wherein the disc spring 2 includes an annular main body 3, an inner hole 30 is provided on the annular main body 3, a group of teeth 31 arranged at intervals protrude in the radial direction of the inner hole 30, a group of teeth 31 ends circumferentially surround a center hole 310, a notch 311 is provided between a pair of circumferentially adjacent teeth 31, the notch 311 consists of a group of first notches 3111 and a group of second notches 3112, and the first notches 3111 and the second notches 3112 are staggered one by one in the circumferential direction.

[0033] It includes: an upper die assembly 4 and a lower die assembly 5, wherein a group of punches 6 are provided on one side of the upper die assembly 4 near the lower die assembly 5, corresponding to the feeding direction of the metal strip 1, a group of punches 6 sequentially include a pair of toothed punches 61, a center hole punch 62, and an outer edge punch 63, the shapes of the pair of toothed punches 61 correspond to the first notch 3111 and the second notch 3112 respectively, the shape of the center hole punch 62 corresponds to the center hole 310, the outer edge punch 63 corresponds to the outer edge of the annular body 3, and a disc-shaped protrusion 631 adapted to the disc spring 2 is provided on the end of the outer edge punch 63, and a group of concave dies 51 are provided on one side of the lower die assembly 5 near the upper die assembly 4, and the concave dies 51 correspond to the punches 6 one by one.

[0034] In this embodiment, the metal strip 1 is first fed into the mold from the feed direction, and a toothed punch 61 is used to punch the metal strip 1 for the first time to form a first notch 3111 on the metal strip 1. Then, another toothed punch 61 is used to punch the metal strip 1 for the second time to form a second notch 3112 on the metal strip 1. Then, the center hole punch 62 is used to punch the metal strip 1 for the third time to form a center hole 310 on the metal strip 1. Finally, the outer edge punch 63 is used to punch the metal strip 1 for the fourth time. The disc-shaped protrusion 631 is fitted with the metal strip 1 to shape the disc spring 2 in three dimensions, and the disc spring 2 is separated from the metal strip 1, thereby completing the processing and forming of the metal strip 1. The corresponding punch 6 can be inserted into the die 51.

[0035] In this embodiment, eight teeth 31 are provided on the disc spring, and the center hole 310 is circular.

[0036] In this embodiment, a pair of toothed punches 61 are designed separately, and the metal strip 1 is directly punched twice in sequence, and then the metal strip 1 is punched in sequence by the center hole punch 62 and the outer edge punch 63, and finally the required disc spring is formed. At the same time, the stamping die in this application directly punches the metal strip 1 multiple times, and there is no need to heat treat the disc spring later, which fundamentally eliminates the deformation of the disc spring during the heat treatment process, thereby improving the disc spring yield rate and reducing its production cost.

[0037] In this embodiment, a group of the punches 6 also includes a group of positioning hole punches 64, corresponding to the feeding direction of the metal strip 1, and the positioning hole punches 64 are arranged on the front side of the toothed punch 61. A group of the punches 6 respectively correspond to a group of stamping stations, and the interval distance between each stamping station is an integer multiple of a, a is the step distance of each feeding movement of the metal strip 1, and each stamping station on the rear side of the positioning hole punch 64 is provided with a positioning protrusion 411 corresponding to the positioning hole punch 64 one by one, and the positioning protrusion 411 is arranged on the upper mold assembly 4, and the lower mold assembly 5 is provided with a group of positioning recesses 52 on the side near the upper mold assembly 4, and the positioning recesses 52 correspond to the positioning protrusions 411 one by one.

[0038] In this embodiment, the positioning protrusion 411 and the positioning hole punch 64 are in the same position relative to the stamping station. The positioning hole punch 64 is used to punch out a positioning hole on the metal strip 1 to provide positioning for the subsequent stamping process and prevent the metal strip 1 from shifting. Each time the metal strip 1 is fed to each stamping station, during the mold closing process, the positioning protrusion 411 extends into the positioning hole on the metal strip 1 to position the metal strip 1 and ensure the accuracy of the stamping position. The positioning recess 52 can be inserted into the corresponding positioning protrusion 411. In this embodiment, there are 2 positioning hole punches 64 and 8 positioning protrusions 411.

[0039] In this embodiment, the punch 6 and the positioning protrusion 411 are detachably mounted on the upper mold assembly 4. When the punch 6 and the positioning protrusion 411 are worn or damaged, they can be repaired and replaced in time without replacing the entire upper mold assembly 4, thereby improving the economy of the mold.

[0040] like Figure 6 , 7 As shown in Figures 8, 9 and 10, in this embodiment, the upper die assembly 4 includes: an upper die plate 41, a punch seat 414 is embedded in the upper die plate 41, the toothed punch 61 includes a group of punch core members 611, the shape of the punch core members 611 corresponds to the missing portion 311, a limiting protrusion 611 is provided on the end of the punch core member 611 away from the lower die assembly 5, a core member mounting countersunk hole 4141 adapted to the punch core member 611 is provided on the punch seat 414, the punch core member 611 is mounted in the core member mounting countersunk hole 4141, a clamping protrusion 4142 is extended from the side of the punch seat 414 away from the lower die assembly 5, and a mounting groove 416 adapted to the clamping protrusion 4142 is provided on the side of the upper die plate 41 away from the lower die assembly 5.

[0041] In the present embodiment, a group of the punch core pieces 611 adopt a split design. If individual punch core pieces 611 are worn or damaged, it is not necessary to replace the entire toothed punch 61. The punch core pieces 611 are installed in the core piece installation countersunk hole 4141. The core piece installation countersunk hole 4141 limits the punch core piece 611 so that the punch core piece 611 is locked on the punch seat 414. The punch seat 414 needs to be used in conjunction with the punch core piece 611. The split design with the upper mold assembly 4 is so that when the internal missing part 311 of the disc spring changes later, only the punch seat 414 and the punch core piece 611 matching the punch seat 414 need to be replaced, instead of replacing the entire upper mold plate 41, thereby improving the economy of the mold. The latch 4142 is used to limit the punch seat 414 so that the punch seat 414 is locked on the upper mold plate 41. In this embodiment, each toothed punch 61 corresponds to four punch core pieces 611 , a group of punch core pieces 611 corresponds to one punch seat 414 , and the template positioning recess 415 is provided on the upper template 41 .

[0042] In this embodiment, a group of template positioning protrusions 53 are provided on the side of the lower mold assembly 5 near the upper mold assembly 4, and a group of template positioning recesses 415 corresponding to the template positioning protrusions 53 are provided on the side of the upper mold assembly 4 near the lower mold assembly 5. The template positioning protrusions 53 are detachably mounted on the lower mold assembly 5.

[0043] In this embodiment, the positioning protrusion 53 is used to position the upper die assembly 4 and the lower die assembly 5 during the stamping process. The template positioning recess 415 can be inserted into the corresponding template positioning protrusion 53. The template positioning protrusion 53 is detachably mounted on the lower die assembly 5. When the template positioning protrusion 53 is worn or damaged, it is convenient to repair and replace it in time without replacing the entire lower die assembly 5, thereby improving the economy of the mold. In this embodiment, there are 10 template positioning protrusions 53.

[0044] like Fig.12 As shown, in this embodiment, a blanking through hole 54 is provided at the bottom of the die 51 corresponding to the toothed punch 61 , the center hole punch 62 , and the positioning hole punch 64 .

[0045] In this embodiment, the blanking through hole 54 is used to discharge the waste punched out by the toothed punch 61 , the center hole punch 62 , and the positioning hole punch 64 during the punching process.

[0046] In this embodiment, the bottom of the die 51 corresponding to the outer edge punch 63 is a dish-shaped concave surface, and the dish-shaped concave surface corresponds to the dish-shaped protrusion 631 .

[0047] In this embodiment, the bottom of the die 51 corresponding to the outer edge punch 63 is a disc-shaped concave surface, which is used to support the disc spring 2 during the stamping process and perform three-dimensional shaping on the disc spring 2.

[0048] like Fig.13 As shown, in this embodiment, the lower mold assembly 5 is provided with a group of grooves 55 corresponding to the die 51, and the lower mold assembly 5 is provided with a group of locking screws 56, which are arranged near the edge of the grooves 55, and the locking screws 56 include a screw head embedded in the lower mold assembly 5, and the screw head extends to the inner side of the die 51.

[0049] In this embodiment, the locking screw 56 is used to limit the concave die 51 so that the concave die 51 can be detachably mounted on the lower die assembly 5 , and the concave die 51 is mounted in the corresponding groove 55 .

[0050] In this embodiment, except for the die 51 corresponding to the positioning hole punch 64 which is provided with one locking screw 56 , the other die dies 51 are all provided with two locking screws 56 .

[0051] In this embodiment, the upper mold assembly 4 also includes: a sandwich plate 42, and the positioning protrusion 411 is provided with a limiting shaft 412 and a limiting protrusion 413 in sequence on the side away from the lower mold assembly 5, the limiting shaft 412 is passed through the upper mold plate 41, and the limiting protrusion 413 is embedded in the side of the upper mold plate 41 close to the sandwich plate 42.

[0052] In this embodiment, the limiting protrusion 413 is used to limit the limiting shaft 412 so that the limiting shaft 412 is locked on the upper template 41, and the sandwich plate 42 is used to resist the limiting protrusion 413 to prevent the positioning protrusion 411 from shifting during the stamping process. In this embodiment, a top support plate 43 is provided on the side of the sandwich plate 42 away from the lower mold assembly 5, the sandwich plate 42 is in contact with the side of the upper template 41 away from the lower mold assembly 5, and the top support plate 43 is in contact with the side of the sandwich plate 42 away from the upper template 41, the limiting protrusion 6111 is embedded in the upper end surface of the top support plate 43, and the upper end of the plug-in corresponding to the positioning hole punch 64 is also provided with a protrusion embedded in the upper end of the top support plate 43. During use, a fixing plate (not shown) is installed on the side of the top support plate 43 away from the sandwich plate 42 to resist the upper ends of the toothed punch 61 and the positioning hole punch 64 to prevent the toothed punch 61 and the positioning hole punch 64 from moving upward during the stamping process. Specifically, the corresponding plug-ins of the center hole punch 62 and the outer edge punch 63 are inserted into the upper die assembly 4, and the upper ends of the corresponding plug-ins of the center hole punch 62 and the outer edge punch 63 are mounted on the fixing plate by screws (not shown).

[0053] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanation here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A disc spring stamping die for stamping a disc spring (2) from a metal strip (1), characterized in that: The disc spring (2) comprises an annular body (3), an inner hole (30) is provided on the annular body (3), a group of teeth (31) arranged at intervals protrude in the radial direction of the inner hole (30), a group of ends of the teeth (31) circumferentially surround a center hole (310), a notch (311) is provided between a pair of circumferentially adjacent teeth (31), the notch (311) comprises a group of first notches (3111) and a group of second notches (3112), the first notches (3111) and the second notches (3112) being staggered one by one in the circumferential direction; The invention comprises an upper die assembly (4) and a lower die assembly (5); a group of punches (6) are provided on one side of the upper die assembly (4) close to the lower die assembly (5), corresponding to the feeding direction of the metal strip (1); the group of punches (6) sequentially comprises a pair of toothed punches (61), a center hole punch (62), and an outer edge punch (63); the pair of toothed punches (61) are shaped to correspond to a first notch (3111) and a second notch (3112), respectively; the center hole punch (62) is shaped to correspond to a center hole (310); the outer edge punch (63) corresponds to the outer edge of the annular body (3); a disc-shaped protrusion (631) adapted to a disc spring (2) is provided at the end of the outer edge punch (63); a group of concave dies (51) are provided on one side of the lower die assembly (5) close to the upper die assembly (4); the concave dies (51) correspond to the punches (6) one by one.

2. The disc spring stamping die according to claim 1, characterized in that: A group of the punches (6) further includes a group of positioning hole punches (64) corresponding to the feeding direction of the metal strip (1), the positioning hole punches (64) being arranged in front of the toothed punch (61), a group of the punches (6) respectively corresponding to a group of stamping stations, the spacing between the stamping stations being an integer multiple of a, a being the step distance of each feeding movement of the metal strip (1); Each stamping station on the rear side of the positioning hole punch (64) is provided with a positioning convex portion (411) corresponding one-to-one to the positioning hole punch (64), and the positioning convex portion (411) is arranged on the upper die assembly (4). A group of positioning concave portions (52) is provided on the side of the lower die assembly (5) close to the upper die assembly (4), and the positioning concave portions (52) correspond one-to-one to the positioning convex portions (411).

3. The disc spring stamping die according to claim 2, characterized in that: The punch (6) and the positioning protrusion (411) are both detachably mounted on the upper die assembly (4).

4. The disc spring stamping die according to claim 1, characterized in that: The upper die assembly (4) comprises: an upper die plate (41), a punch seat (414) is embedded in the upper die plate (41), the toothed punch (61) comprises a group of punch core pieces (611), the shape of the punch core pieces (611) corresponds to the notch (311), a limiting protrusion (6111) is provided on one end of the punch core piece (611) away from the lower die assembly (5), a core piece mounting countersunk hole (4141) adapted to the punch core piece (611) is provided on the punch seat (414), the punch core piece (611) is mounted in the core piece mounting countersunk hole (4141), a clamping protrusion (4142) is extended from the side of the punch seat (414) away from the lower die assembly (5), and a mounting notch (416) adapted to the clamping protrusion (4142) is provided on the side of the upper die plate (41) away from the lower die assembly (5).

5. The disc spring stamping die according to claim 1, characterized in that: A group of template positioning protrusions (53) are provided on one side of the lower mold assembly (5) close to the upper mold assembly (4), and a group of template positioning recesses (415) corresponding one-to-one to the template positioning protrusions (53) are provided on one side of the upper mold assembly (4) close to the lower mold assembly (5). The template positioning protrusions (53) are detachably mounted on the lower mold assembly (5).

6. The disc spring stamping die according to claim 1, characterized in that: A blanking through hole (54) is provided at the bottom of the concave die (51) corresponding to the toothed punch (61), the center hole punch (62), and the positioning hole punch (64).

7. The disc spring stamping die according to claim 1, characterized in that: The bottom of the concave die (51) corresponding to the outer edge punch (63) is a dish-shaped concave surface, and the dish-shaped concave surface corresponds to the dish-shaped protrusion (631).

8. The disc spring stamping die according to claim 1, characterized in that: The lower die assembly (5) is provided with a group of grooves (55) corresponding to the concave die (51), and the lower die assembly (5) is provided with a group of locking screws (56), the locking screws (56) are arranged close to the edges of the grooves (55), and the locking screws (56) include screw heads embedded in the lower die assembly (5), and the screw heads extend to the inner side of the concave die (51).

9. The disc spring stamping die according to claim 2, characterized in that: The upper mold assembly (4) further comprises: a sandwich plate (42); a limiting shaft (412) and a limiting convex portion (413) are sequentially provided on the side of the positioning protrusion (411) away from the lower mold assembly (5); the limiting shaft (412) is passed through the upper mold plate (41); and the limiting convex portion (413) is embedded on the side of the upper mold plate (41) close to the sandwich plate (42).

Images