A high-precision stainless steel drawing die

Abstract

This utility model relates to a high-precision stainless steel stretching forming mold, belonging to the field of stretching mold technology. The initial stretching mold realizes the blanking and stretching, and then the cleaning component cleans the initial part. After cleaning, the heat treatment component performs heat treatment to reduce the hardness of the initial part and eliminate internal stress. Then, the initial part is stretched and thinned a second time through the secondary stretching mold to form the intermediate part. Then, the 45-degree flanging mold and the 90-degree flanging mold are used to shape the angle of the intermediate part. Finally, the edge trimming mold removes the excess edges and corners of the intermediate part to form the finished part. This production process can reduce the cold work hardening of stainless steel and prevent surface scratches and cracks. After stretching and forming, the product can meet the requirements for surface roughness and flatness of the parts.

Description

Technical Field

[0001] This utility model belongs to the field of stretching mold technology, specifically relating to a high-precision stainless steel stretching mold. Background Technology

[0002] Stainless steel is a widely used material with numerous varieties, and it is extensively used in the automotive, shipbuilding, construction, and aerospace industries, covering almost all sectors. For parts requiring welded seals, strict control over the surface roughness and flatness of the weld surface is particularly important; it can be said that the surface roughness and flatness of the weld surface determine the sealing performance of the seal.

[0003] Traditional surface treatment methods for stainless steel parts have certain drawbacks, especially for stainless steel profiles. The processing methods are not very perfect, and the surface effect is not very good. In practical applications, general surface treatment methods are difficult to deal with defects such as spots and cracks in the substrate, and the precision requirements are not met. Therefore, this solution was developed. Utility Model Content

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide a high-precision stainless steel stretching mold to reduce the cold work hardening of stainless steel and prevent surface scratches and cracks.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a high-precision stainless steel stretching forming mold, including a preliminary stretching mold, a cleaning component, a heat treatment component, a secondary stretching mold, a 45-degree flanging mold, a 90-degree flanging mold, and a trimming mold. The preliminary stretching mold is used to stretch the raw material into a preliminary part. The cleaning component is used to clean the preliminary part. The heat treatment component is used to anneal the preliminary part. The secondary stretching mold is used to stretch the preliminary part a second time to thin it into an intermediate part. The 45-degree flanging mold and the 90-degree flanging mold are used to shape the angle of the intermediate part. The trimming mold removes the excess edges and corners of the intermediate part to form the finished part.

[0006] Furthermore, the preliminary stretching die includes a first upper die assembly and a first lower die assembly. The first upper die assembly includes a first upper die base, a first fixed plate, a first upper die cavity, a first upper die cavity inner ejector, and a first elastic body. A first through hole is formed on the first fixed plate. The first upper die cavity is disposed in the first through hole. The first upper die cavity has a first mounting hole. The first upper die cavity inner ejector is located in the first mounting hole. The first elastic body is located in the first mounting hole. The upper end of the first elastic body abuts against the first upper die base, and the lower end of the first elastic body abuts against the first upper die cavity inner ejector.

[0007] The first lower die assembly includes a first lower die base, a first concave die plate, a first lower punch, a pressure ring, and a second elastic body. A second mounting hole is formed on the first concave die plate. The pressure ring is located at the bottom of the second mounting hole. The first lower punch is located inside the second mounting hole and above the pressure ring. The second elastic body is used to provide an upward elastic force to the pressure ring.

[0008] Furthermore, the first upper module also includes a first upper pad, a first height limiting plate, and a first unloading plate, which are arranged sequentially from top to bottom.

[0009] Furthermore, the first lower mold assembly also includes a first lower clamping plate and a first lower pad, and the first concave mold plate, the first lower clamping plate, the first lower pad, and the first lower mold base are arranged sequentially from top to bottom.

[0010] Furthermore, the secondary stretching die includes a second upper die assembly and a second lower die assembly;

[0011] The second upper module includes a second upper mold base, a second fixed plate, and a stretching punch. The second upper mold base and the second fixed plate are arranged vertically, and the stretching punch is fixed to the second fixed plate and extends out of the lower surface of the second fixed plate.

[0012] The second lower die assembly includes a positioning plate, a second lower clamping plate, a second lower pad, a second lower die base, and a stretching die. The positioning plate, the second lower clamping plate, the second lower pad, and the second lower die base are arranged sequentially from top to bottom. A positioning hole is formed on the positioning plate, and a third mounting hole is formed on the second lower clamping plate. The stretching die is installed in the third mounting hole. A second through hole is formed on the second lower pad, and a third through hole is formed on the second lower die base. The positioning hole, the third mounting hole, the second through hole, and the third through hole are coaxially arranged. An annular groove is provided at the upper end of the third through hole, and a stripper ring is provided in the annular groove. A tension spring is connected to the rear side of the stripper ring.

[0013] Furthermore, the 45-degree flanging die includes a third upper die and a third lower die;

[0014] The third upper module assembly includes a third upper mold base, a third fixed plate, a second upper die inner ejector, a first flanged upper die, and a first striking rod. The third upper mold base and the third fixed plate are spaced apart vertically. The first flanged upper die is installed in the middle of the third fixed plate. The first flanged upper die has a fourth mounting hole and is disposed in the fourth mounting hole. The first striking rod is used to drive the second upper die inner ejector to move downward.

[0015] The third lower module includes a third lower mold base, a third concave mold plate, and a first flanging lower punch. The third concave mold plate and the third lower mold base are arranged vertically. The first flanging lower punch is installed on the third concave mold plate. The upper end of the first flanging lower punch is frustoconical. The upper plane of the first flanging lower punch corresponds to the fourth mounting hole. The inclined angle of the upper end of the first flanging lower punch is 45 degrees.

[0016] Furthermore, the third upper module includes a third upper pad, and the third upper mold base, the third upper pad, and the third fixing plate are arranged sequentially from top to bottom;

[0017] The third lower module includes a third lower pad, and the third concave template, the third lower pad, and the third lower mold base are arranged sequentially from top to bottom.

[0018] Furthermore, the 90-degree flanging die includes a fourth upper die assembly and a fourth lower die assembly;

[0019] The fourth upper mold assembly includes a fourth upper mold base, a fourth fixed plate, a third upper concave mold inner ejector, a second flanged upper concave mold, and a second striking rod. The fourth upper mold base and the fourth fixed plate are spaced apart vertically. The second flanged upper concave mold is installed in the middle of the fourth fixed plate. The second flanged upper concave mold has a fifth mounting hole and is disposed in the fifth mounting hole. The second striking rod is used to drive the third upper concave mold inner ejector to move downward.

[0020] The fourth lower module includes a fourth lower mold base, a fourth concave mold plate, and a second flanged lower punch. The fourth concave mold plate and the fourth lower mold base are arranged vertically. The second flanged lower punch is installed on the fourth concave mold plate and extends out of the fourth concave mold plate and is adapted to the fifth mounting hole.

[0021] Furthermore, the fourth upper module includes a fourth upper pad, and the fourth upper mold base, the fourth upper pad, and the fourth fixing plate are arranged sequentially from top to bottom;

[0022] The fourth lower module includes a fourth lower pad, and the fourth concave template, the fourth lower pad, and the fourth lower mold base are arranged sequentially from top to bottom.

[0023] Furthermore, the cutting die includes a fifth upper die assembly and a fifth lower die assembly;

[0024] The fifth upper module assembly includes a fifth upper mold base, a fifth upper pad, a fifth fixed plate, a second upper die, a fourth upper die inner release, and a third elastic body. The fifth upper mold base, the fifth upper pad, and the fifth fixed plate are arranged sequentially from top to bottom. The second upper die is disposed on the fifth fixed plate. The second upper die has a fourth through hole. The fourth upper die inner release is located in the fourth through hole. The third elastic body is used to reset the fourth upper die inner release.

[0025] The fifth lower mold assembly includes a fifth concave mold plate, a fifth lower backing plate, a fifth lower mold base, a first lower concave mold, a lower concave mold inner ejector, a waste cutter, and a fourth elastic body. The fifth concave mold plate, the fifth lower backing plate, and the fifth lower mold base are arranged sequentially from top to bottom. The first lower concave mold is disposed between the fifth concave mold plates. A fifth through hole is formed in the first lower concave mold. The waste cutter is disposed in the fifth through hole. The lower concave mold inner ejector is disposed in the fifth through hole and passes through the fifth lower backing plate. The fourth elastic body is used to reset the lower concave mold inner ejector.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] This invention provides a high-precision stainless steel stretching forming mold. A preliminary stretching mold is used to stretch the material, followed by a cleaning component to clean the initial part. After cleaning, a heat treatment component is used to reduce the hardness and eliminate internal stress of the initial part. A secondary stretching mold is then used to stretch and thin the initial part to form an intermediate part. A 45-degree and 90-degree flanging mold are then used to shape the angle of the intermediate part. Finally, a trimming mold is used to remove excess edges and corners of the intermediate part to form the finished part. This production method reduces work hardening of stainless steel, prevents surface scratches and cracking, and ensures that the stretched product meets the requirements for surface roughness and flatness. Attached Figure Description

[0028] Figure 1 This is a cross-sectional view of the preliminary stretching die in this utility model.

[0029] Figure 2 This is a cross-sectional view of the preliminary stretching mold after it has been opened in this utility model.

[0030] Figure 3 This is a cross-sectional view of the secondary stretching die in this utility model.

[0031] Figure 4 This is a cross-sectional view of the 45-degree flange mold in this utility model.

[0032] Figure 5 This is a cross-sectional view of the 90-degree flange mold in this utility model.

[0033] Figure 6 This is a cross-sectional view of the cutting mold in this utility model.

[0034] Markings in the diagram: 1. Preliminary stretching die; 11. First upper die assembly; 111. First upper die base; 112. First fixing plate; 113. First upper pad; 114. First height limiting plate; 115. First stripper plate; 116. First upper die cavity; 117. First upper die cavity inner ejector; 118. First elastic body; 12. First lower die assembly; 121. First lower die base; 122. First die cavity template; 1221. First die cavity insert; 123. First lower clamping plate; 124. First lower pad; 125. First lower punch; 126. Pressure ring; 1 27. Second elastic body; 2. Secondary stretching die; 21. Second upper die assembly; 211. Second upper die base; 212. Second fixing plate; 213. Stretching punch; 22. Second lower die assembly; 221. Positioning plate; 222. Second lower clamping plate; 223. Second lower pad; 224. Second lower die base; 2241. Stripper ring; 2242. Tension spring; 225. Stretching die; 3. 45-degree flanging die; 31. Third upper die assembly; 311. Third upper die base; 312. Third upper pad; 313. Third fixing plate; 314. Second upper die... 315. First flanging upper die; 316. First punch; 32. Third lower die assembly; 321. Third lower die base; 322. Third lower backing plate; 323. Third die plate; 324. First flanging lower punch; 4. 90-degree flanging die; 41. Fourth upper die assembly; 411. Fourth upper die base; 412. Fourth upper backing plate; 413. Fourth fixing plate; 414. Third upper die assembly (inner ejection); 415. Second flanging upper die; 416. Second punch; 42. Fourth lower die assembly; 421. Fourth lower die base; 422. Fourth lower backing plate ; 423, Fourth concave mold plate; 424, Second flanging lower punch; 5, Trimming mold; 51, Fifth upper mold assembly; 511, Fifth upper mold base; 512, Fifth upper pad plate; 513, Fifth fixing plate; 514, Second upper concave mold; 515, Fourth upper concave mold inner ejector; 516, Third elastic body; 52, Fifth lower mold assembly; 521, Cover plate; 522, Fifth concave mold plate; 523, Fifth lower pad plate; 524, Fifth lower mold base; 525, First lower concave mold; 526, Lower concave mold inner ejector; 527, Scrap cutter; 528, Fourth elastic body. Detailed Implementation

[0035] To make the above-mentioned features and advantages of this utility model more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings for detailed explanation.

[0036] like Figures 1-6 As shown, this embodiment provides a high-precision stainless steel stretching forming mold, including a preliminary stretching mold 1, a cleaning component, a heat treatment component, a secondary stretching mold 2, a 45-degree flanging mold 3, a 90-degree flanging mold 4, and a trimming mold 5.

[0037] The preliminary stretching die 1 is used to stretch the raw material into preliminary parts. The preliminary stretching die 1 includes a first upper die group 11 and a first lower die group 12.

[0038] The first upper module 11 includes a first upper mold base 111, a first fixing plate 112, a first upper pad 113, a first height limiting plate 114, a first stripper plate 115, a first upper die 116, a first upper die inner ejector 117, and a first elastic body 118. The first upper mold base 111, the first upper pad 113, the first fixing plate 112, the first height limiting plate 114, and the first stripper plate 115 are arranged sequentially from top to bottom. A first through hole is formed on the first fixed plate 112. The first upper die 116 is disposed in the first through hole. A first fixing insert is disposed between the fixed plate and the first upper die 116. The first upper die 116 extends to the lower opening of the first stripper plate 115. A first stripper insert is disposed between the first upper die 116 and the first stripper plate 115. The first upper die 116 has a first mounting hole. The first upper die inner ejector 117 is located in the first mounting hole. The first elastic body 118 is located in the first mounting hole. The upper end of the first elastic body 118 abuts against the first upper die base 111 and the lower end of the first elastic body 118 abuts against the first upper die inner ejector 117. The first elastic body 118 is a rectangular spring.

[0039] The first lower mold assembly 12 includes a first lower mold base 121, a first concave mold plate 122, a first lower clamping plate 123, a first lower pad 124, a first lower punch 125, a pressure ring 126, and a second elastic body 127. The first concave mold plate 122, the first lower clamping plate 123, the first lower pad 124, and the first lower mold base 121 are arranged sequentially from top to bottom. A second mounting hole is formed on the first concave mold plate 122. The pressure ring 126 is located at the bottom of the second mounting hole. The first lower punch 125 is located inside the second mounting hole and above the pressure ring 126. The first lower punch 125 extends to an opening on the first concave mold plate 122. A first concave mold insert 1221 is provided between the first lower punch 125 and the first concave mold plate 122. The second elastic body 127 is used to provide an upward elastic force to the pressure ring 126. The second elastic body 127 is a rectangular spring.

[0040] like Figures 1-2As shown, the working principle of the preliminary stretching die 1 is as follows: After the raw material enters the die, the machine travels down a certain distance, and the first unloading plate 115 and the first concave die 122 position and clamp the raw material. As the machine continues its downward stroke, the first upper concave die 116 begins to work. First, it interacts with the first concave die insert 1221 to cut the raw material. Then, as the machine continues its downward stroke, it interacts with the first lower punch 125 to stretch the raw material into the desired part features. Subsequently, as the machine moves upward, the die opens, the rectangular spring releases its stored energy, and the pressure ring 126 moves upward under the action of potential energy, thus pushing the part away from the first lower punch 125. At the same time, the inner ejector 117 of the first upper concave die also moves downward under the action of potential energy, pushing the part away from the first upper concave die 116. Thus, the pre-formed preliminary part is discharged, completing one forming cycle.

[0041] The cleaning unit is used to clean the initial parts. The cleaning unit uses an ultrasonic cleaner to remove oil and dirt from the surface of the initial parts, ensuring that the initial parts are clean before entering the next process.

[0042] The heat treatment assembly is used to perform annealing heat treatment on preliminary parts. The heat treatment assembly adopts existing commonly used heat treatment equipment. The purpose is to reduce the hardness of the parts; reduce residual stress, stabilize dimensions, reduce deformation and crack tendency; refine grains and homogenize materials, adjust the microstructure, and eliminate microstructural defects.

[0043] The secondary stretching die 2 is used to stretch and thin the initial part to form the intermediate part. The secondary stretching die 2 includes a second upper die group 21 and a second lower die group 22.

[0044] The second upper module 21 includes a second upper mold base 211, a second fixed plate 212 and a stretching punch 213. The second upper mold base 211 and the second fixed plate 212 are arranged vertically. The stretching punch 213 is fixed on the second fixed plate 212 and extends out of the lower surface of the second fixed plate 212.

[0045] The second lower module 22 includes a positioning plate 221, a second lower clamping plate 222, a second lower pad 223, a second lower mold base 224, and a stretching die 225. The positioning plate 221, the second lower clamping plate 222, the second lower pad 223, and the second lower mold base 224 are arranged sequentially from top to bottom. A positioning hole is formed on the positioning plate, and the opening of the positioning hole is chamfered. A third mounting hole is formed on the second lower clamping plate 222, and the stretching die 225 is installed in the third mounting hole. The inner ring of the stretching die 225 has a flared opening that is larger on the outside and smaller on the inside. A second through hole is formed on the second lower pad 223, and a third through hole is formed on the second lower mold base 224. The positioning hole, the third mounting hole, the second through hole, and the third through hole are arranged coaxially. An annular groove is provided at the upper end of the third through hole, and a stripper ring 2241 is provided in the annular groove. A tension spring 2242 is connected to the rear side of the stripper ring 2241. The inner ring of the stripper ring 2241 is a frustum shape that is larger at the top and smaller at the bottom.

[0046] like Figure 3 As shown, the working principle of the secondary stretching die 2 is as follows: The initial part is placed into the positioning hole of the positioning plate 221. The machine moves downwards, and the first stretching punch 213 pushes the part downwards, forming the desired part features through the combined action of the first stretching die 225. Subsequently, the machine moves upwards, and the stripper ring 2241, under the action of the tension spring 2242, contracts and clamps the first stretching punch 213, thus releasing the part. As the machine continues to move, the die performs the next stamping cycle.

[0047] The 45-degree flanging die 3 and the 90-degree flanging die 4 are used to shape the angle of intermediate parts. The 45-degree flanging die 3 includes a third upper die group 31 and a third lower die group 32.

[0048] The third upper module 31 includes a third upper mold base 311, a third upper pad 312, a third fixing plate 313, a second upper die inner ejector 314, a first flanged upper die 315, and a first striking rod 316. The third upper mold base 311, the third upper pad 312, and the third fixing plate 313 are arranged sequentially from top to bottom. The first flanged upper die 315 is installed in the middle of the third fixing plate 313 and has a fourth mounting hole. The first flanged upper die 315 is disposed in the fourth mounting hole. The first striking rod 316 passes through the third upper mold base 311, the third upper pad 312, and the first flanged upper die 315 to drive the second upper die inner ejector 314 to move downward.

[0049] The third lower module 32 includes a third lower mold base 321, a third lower backing plate 322, a third concave mold plate 323, and a first flanging lower punch 324, which are arranged sequentially from top to bottom. The first flanging lower punch 324 is mounted on the third concave mold plate 323. The upper end of the first flanging lower punch 324 is frustoconical, and the upper plane of the first flanging lower punch 324 corresponds to the fourth mounting hole. The inclined angle of the upper end of the first flanging lower punch 324 is 45 degrees.

[0050] like Figure 4 As shown, the working principle of the 45-degree flanging die 3 is as follows: The intermediate part is fitted into the first flanging lower punch 324, and the machine moves downward. Under the combined action of the first flanging lower punch 324 and the first flanging upper die 315, the part undergoes a 45-degree flanging operation. Subsequently, the machine moves upward to the top dead center position, and the first push rod 316 pushes the second upper die inner ejector 314 downward, thereby pushing the intermediate part away from the first flanging upper die 315. As the machine continues to move, the die performs the next stamping cycle.

[0051] The 90-degree flanging die 4 includes a fourth upper die assembly 41 and a fourth lower die assembly 42. The fourth upper die assembly 41 includes a fourth upper die base 411, a fourth upper pad 412, a fourth fixing plate 413, a third upper die recess 414, a second flanging upper die 415, and a second striking rod 416. The fourth upper die base 411, the fourth upper pad 412, and the fourth fixing plate 413 are arranged sequentially from top to bottom. The second flanging upper die 415 is installed in the middle of the fourth fixing plate 413, and the second flanging upper die 415 has a fifth mounting hole, which is located within the fifth mounting hole. The second striking rod 416 is used to drive the third upper die recess 414 to move downward.

[0052] The fourth lower mold assembly 42 includes a fourth lower mold base 421, a fourth lower backing plate 422, a fourth concave mold plate 423, and a second flanging lower punch 424. The fourth concave mold plate 423, the fourth lower backing plate 422, and the fourth lower mold base 421 are arranged sequentially from top to bottom. The second flanging lower punch 424 is mounted on the fourth concave mold plate 423, and extends out of the fourth concave mold plate 423 and is adapted to the fifth mounting hole.

[0053] like Figure 5 As shown, the working principle of the 90-degree flanging die 4 is as follows: The intermediate part is fitted into the second flanging lower punch 424, the machine table descends, and under the combined action of the second flanging lower punch 424 and the second flanging upper die 415, the part undergoes a 90-degree flanging operation. Subsequently, the machine table ascends to the top dead center position, and the second push rod 416 pushes the second upper die to disengage, thereby pushing the part away from the "③ flanging upper die". As the machine table continues to move, the die performs the next stamping cycle.

[0054] The trimming die 5 removes excess edges and corners from the intermediate parts to form the finished parts. The trimming die 5 includes a fifth upper die group 51 and a fifth lower die group 52.

[0055] The fifth upper module 51 includes a fifth upper mold base 511, a fifth upper pad 512, a fifth fixing plate 513, a second upper die 514, a fourth upper die inner ejector 515, and a third elastic body 516. The fifth upper mold base 511, the fifth upper pad 512, and the fifth fixing plate 513 are arranged sequentially from top to bottom. The second upper die 514 is disposed on the fifth fixing plate 513. The second upper die 514 has a fourth through hole. The fourth upper die inner ejector 515 is located in the fourth through hole. The third elastic body 516 is used to reset the fourth upper die inner ejector 515. The third elastic body 516 is a rectangular spring.

[0056] The fifth lower mold assembly 52 includes a cover plate 521, a fifth concave mold plate 522, a fifth lower pad plate 523, a fifth lower mold base 524, a first lower concave mold 525, a lower concave mold inner ejector 526, a waste cutter 527, and a fourth elastic body 528. The cover plate 521, the fifth concave mold plate 522, the fifth lower pad plate 523, and the fifth lower mold base 524 are arranged sequentially from top to bottom. The cover plate 521 is provided with a through hole. The first lower concave mold 525 is arranged between the fifth concave mold plates 522. A lower concave mold base is provided in the inner ring of the fifth concave mold plate 522. A fifth through hole is formed in the first lower concave mold 525. The waste cutter 527 is arranged in the fifth through hole. The lower concave mold inner ejector 526 is arranged in the fifth through hole and passes through the fifth lower pad plate 523. The fourth elastic body 528 is used to reset the lower concave mold inner ejector 526.

[0057] like Figure 6 As shown, the working principle of the trimming die 5 is as follows: The intermediate part is placed into the first lower die 525. The machine moves downwards, and the fourth upper die inner ejector 515, under the action of elasticity, works together with the first lower die 525 to position and clamp the part. The machine continues to move downwards, and the second upper die 514 and the first lower die 525 work together to remove waste material. Simultaneously, the waste material is cut by the waste cutter 527 under pressure impact and discharged through the cavity formed by the housing, the fifth die plate 522, the fifth lower pad 523, the fifth lower die base 524, and the first lower die 525. Subsequently, the die moves upwards, the rectangular spring releases its stored energy, and the lower die inner ejector 526 and the fourth upper die inner ejector 515 push the finished part out of the first lower die 525, completing the flange trimming process. As the machine continues to move, the die begins the next stamping cycle.

[0058] The foregoing has shown and described the basic principles and main features of this invention, as well as its advantages. Those skilled in the art should understand that this invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this invention. Various changes and modifications can be made to this invention without departing from its spirit and scope. All such changes and modifications fall within the scope of this invention as defined by the appended claims and their equivalents.

Claims

1. A high-precision stainless steel drawing die, characterized in that: The assembly includes a preliminary stretching die, a cleaning component, a heat treatment component, a secondary stretching die, a 45-degree flanging die, a 90-degree flanging die, and a trimming die. The preliminary stretching die is used to stretch the raw material into a preliminary part. The cleaning component is used to clean the preliminary part. The heat treatment component is used to anneal the preliminary part. The secondary stretching die is used to stretch the preliminary part a second time to thin it into an intermediate part. The 45-degree flanging die and the 90-degree flanging die are used to shape the angle of the intermediate part. The trimming die removes excess edges and corners of the intermediate part to form a finished part.

2. The high-precision stainless steel drawing die according to claim 1, characterized in that: The preliminary stretching die includes a first upper die assembly and a first lower die assembly. The first upper die assembly includes a first upper die base, a first fixed plate, a first upper die cavity, a first upper die cavity inner ejector, and a first elastic body. A first through hole is formed on the first fixed plate. The first upper die cavity is disposed in the first through hole. The first upper die cavity has a first mounting hole. The first upper die cavity inner ejector is located in the first mounting hole. The first elastic body is located in the first mounting hole. The upper end of the first elastic body abuts against the first upper die base, and the lower end of the first elastic body abuts against the first upper die cavity inner ejector. The first lower die assembly includes a first lower die base, a first concave die plate, a first lower punch, a pressure ring, and a second elastic body. A second mounting hole is formed on the first concave die plate. The pressure ring is located at the bottom of the second mounting hole. The first lower punch is located inside the second mounting hole and above the pressure ring. The second elastic body is used to provide an upward elastic force to the pressure ring.

3. The high-precision stainless steel drawing die according to claim 2, characterized in that: The first upper module also includes a first upper pad, a first height limiting plate, and a first unloading plate, which are arranged sequentially from top to bottom.

4. The high-precision stainless steel drawing die according to claim 2, characterized in that: The first lower mold assembly also includes a first lower clamping plate and a first lower pad, and the first concave mold plate, the first lower clamping plate, the first lower pad and the first lower mold base are arranged in order from top to bottom.

5. The high-precision stainless steel drawing die according to claim 1, characterized in that: The secondary stretching die includes a second upper die assembly and a second lower die assembly; The second upper module includes a second upper mold base, a second fixed plate, and a stretching punch. The second upper mold base and the second fixed plate are arranged vertically, and the stretching punch is fixed to the second fixed plate and extends out of the lower surface of the second fixed plate. The second lower die assembly includes a positioning plate, a second lower clamping plate, a second lower pad, a second lower die base, and a stretching die. The positioning plate, the second lower clamping plate, the second lower pad, and the second lower die base are arranged sequentially from top to bottom. A positioning hole is formed on the positioning plate, and a third mounting hole is formed on the second lower clamping plate. The stretching die is installed in the third mounting hole. A second through hole is formed on the second lower pad, and a third through hole is formed on the second lower die base. The positioning hole, the third mounting hole, the second through hole, and the third through hole are coaxially arranged. An annular groove is provided at the upper end of the third through hole, and a stripper ring is provided in the annular groove. A tension spring is connected to the rear side of the stripper ring.

6. The high-precision stainless steel drawing die according to claim 1, characterized in that: The 45-degree flanging die includes a third upper die assembly and a third lower die assembly; The third upper module assembly includes a third upper mold base, a third fixed plate, a second upper die inner ejector, a first flanged upper die, and a first striking rod. The third upper mold base and the third fixed plate are spaced apart vertically. The first flanged upper die is installed in the middle of the third fixed plate. The first flanged upper die has a fourth mounting hole and is disposed in the fourth mounting hole. The first striking rod is used to drive the second upper die inner ejector to move downward. The third lower module includes a third lower mold base, a third concave mold plate, and a first flanging lower punch. The third concave mold plate and the third lower mold base are arranged vertically. The first flanging lower punch is installed on the third concave mold plate. The upper end of the first flanging lower punch is frustoconical. The upper plane of the first flanging lower punch corresponds to the fourth mounting hole. The inclined angle of the upper end of the first flanging lower punch is 45 degrees.

7. A high-precision stainless steel drawing die according to claim 6, characterized in that: The third upper module includes a third upper pad, and the third upper mold base, the third upper pad, and the third fixing plate are arranged sequentially from top to bottom; The third lower module includes a third lower pad, and the third concave template, the third lower pad, and the third lower mold base are arranged sequentially from top to bottom.

8. The high-precision stainless steel drawing die according to claim 1, characterized in that: The 90-degree flanging die includes a fourth upper die group and a fourth lower die group; The fourth upper mold assembly includes a fourth upper mold base, a fourth fixed plate, a third upper concave mold inner ejector, a second flanged upper concave mold, and a second striking rod. The fourth upper mold base and the fourth fixed plate are spaced apart vertically. The second flanged upper concave mold is installed in the middle of the fourth fixed plate. The second flanged upper concave mold has a fifth mounting hole and is disposed in the fifth mounting hole. The second striking rod is used to drive the third upper concave mold inner ejector to move downward. The fourth lower module includes a fourth lower mold base, a fourth concave mold plate, and a second flanged lower punch. The fourth concave mold plate and the fourth lower mold base are arranged vertically. The second flanged lower punch is installed on the fourth concave mold plate and extends out of the fourth concave mold plate and is adapted to the fifth mounting hole.

9. A high-precision stainless steel drawing die according to claim 8, characterized in that: The fourth upper module includes a fourth upper pad, and the fourth upper mold base, the fourth upper pad, and the fourth fixing plate are arranged sequentially from top to bottom; The fourth lower module includes a fourth lower pad, and the fourth concave template, the fourth lower pad, and the fourth lower mold base are arranged sequentially from top to bottom.

10. A high-precision stainless steel drawing die according to claim 1, characterized in that: The cutting die includes a fifth upper die assembly and a fifth lower die assembly; The fifth upper module assembly includes a fifth upper mold base, a fifth upper pad, a fifth fixed plate, a second upper die, a fourth upper die inner release, and a third elastic body. The fifth upper mold base, the fifth upper pad, and the fifth fixed plate are arranged sequentially from top to bottom. The second upper die is disposed on the fifth fixed plate. The second upper die has a fourth through hole. The fourth upper die inner release is located in the fourth through hole. The third elastic body is used to reset the fourth upper die inner release. The fifth lower mold assembly includes a fifth concave mold plate, a fifth lower backing plate, a fifth lower mold base, a first lower concave mold, a lower concave mold inner ejector, a waste cutter, and a fourth elastic body. The fifth concave mold plate, the fifth lower backing plate, and the fifth lower mold base are arranged sequentially from top to bottom. The first lower concave mold is disposed between the fifth concave mold plates. A fifth through hole is formed in the first lower concave mold. The waste cutter is disposed in the fifth through hole. The lower concave mold inner ejector is disposed in the fifth through hole and passes through the fifth lower backing plate. The fourth elastic body is used to reset the lower concave mold inner ejector.

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