Cover plate machining mold and machining process thereof

Abstract

The invention discloses a cover plate machining mold and a machining process thereof, and relates to the technical field of sheet metal machining, and the mold for machining a metal cover plate comprises an upper mold base plate and a lower mold base plate; a continuous forming structure is arranged between the upper die base plate and the lower die base plate. The continuous forming structure comprises a first punching and trimming module, a stretching and shaping module, a second punching and trimming module, a hole flanging and shaping module and a cutting and flanging module. Wherein the stretching and shaping module is used for carrying out variable-size stretching and shaping on a material belt, and the phenomenon of cracking at the joint is avoided; the technology comprises the steps of first punching and trimming, stretching and shaping, second punching and trimming, hole flanging and shaping and cutting and flanging, and continuous machining is conducted on the metal cover plate.

Description

Technical Field

[0001] The present invention relates to the technical field of sheet metal processing, and particularly relates to a cover plate processing mold and its processing technology. Background Art

[0002] As a common structural part in modern industrial manufacturing, the processing technology of sheet metal metal parts involves precise coordination of multiple processes, which is a key link to achieve product functionality and aesthetics. Among them, for metal cover plates such as Figure 3 and Figure 4 shown, the traditional processing technology usually includes the following processes: punching, trimming, stretching, punching, flanging, inner hole shaping, trimming the flanging, etc.

[0003] However, there are currently products in which the main hole 202 of the metal cover plate is relatively close to the side step 201. When the main hole 202 and the side step 201 are integrally formed by stretching using the traditional process, cracks are likely to appear at the connection (as shown in Figure 40 ), resulting in product defects.

[0004] Therefore, it is urgent to develop a cover plate processing mold and its processing technology to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a cover plate processing mold and its processing technology to solve the problem that cracks are likely to appear at the connection when the main hole and the side step are integrally formed by stretching using the above traditional process.

[0006] The purpose of the present invention can be achieved by the following technical solutions: A cover plate processing mold for processing a metal cover plate includes an upper die base plate and a lower die base plate, and a continuous forming structure is arranged between the upper die base plate and the lower die base plate: The continuous forming structure includes a punching and trimming module one, a stretching and shaping module, a punching and trimming module two, a flanging and shaping module, and a trimming and flanging module; wherein the stretching and shaping module performs variable-size stretching and shaping on the strip.

[0007] As a further solution of the present invention: The punching and trimming module one includes an upper die assembly one and a lower die assembly one; the upper die assembly one includes an upper die bottom plate one and an upper die intermediate plate one, an upper die backing plate one and an upper die forming plate are arranged above the upper die intermediate plate one, a plurality of groups of trimming cutter heads one are arranged on the upper die bottom plate one, and the plurality of groups of trimming cutter heads one all penetrate through the upper die intermediate plate one, the upper die backing plate one and the upper die forming plate and extend to the outside; the lower die assembly one includes a lower die backing plate one and a lower die forming plate, and a plurality of groups of trimming cutter seats are arranged on the lower die forming plate; the plurality of groups of trimming cutter seats cooperate with the plurality of groups of trimming cutter heads one to cut the strip to form a connecting portion.

[0008] As a further solution of the present invention: the stretching and shaping module includes an upper die assembly two and a lower die assembly two; the upper die assembly two includes an upper die bottom plate two and an upper die intermediate plate two, an upper die backing plate two is arranged above the upper die intermediate plate two, a stretching upper forming plate and a shaping upper forming plate are arranged on the upper die backing plate two, and a stretching upper die core and a shaping upper die core are arranged on the die intermediate plate two; the lower die assembly two includes a lower die backing plate two, a stretching lower forming plate and a shaping lower forming plate are arranged on the lower die backing plate two, a stretching lower die core and a shaping lower die core are arranged on the lower die backing plate two; and a stretching boss is arranged at the top of the stretching lower die core, and a shaping boss is arranged at the top of the shaping lower die core.

[0009] As a further solution of the present invention: the upper die backing plate two is provided with multiple groups of tie rods two, and the other ends of the multiple groups of tie rods two penetrate through the upper die bottom plate two and the upper die intermediate plate two; multiple groups of nitrogen gas springs two are installed on the upper die substrate, and the multiple groups of nitrogen gas springs two all penetrate through the upper die bottom plate two and the upper die intermediate plate two and abut against the upper die backing plate two.

[0010] As a further solution of the present invention: the stretching upper forming plate is provided with a stretching boss forming surface, and the shaping upper forming plate is provided with a shaping boss forming surface; the depth of the shaping boss forming surface is 1-2 strip thicknesses deeper than that of the stretching boss forming surface.

[0011] As a further solution of the present invention: the stretching upper die core has a forming fillet, the forming fillet connects the side step of the metal cover plate and the main hole, and the radius of the forming fillet is larger than the radius of the standard size fillet.

[0012] As a further solution of the present invention: side elastic plates one are symmetrically arranged on both sides of the lower die backing plate two, multiple groups of springs six and multiple groups of nitrogen gas springs four are arranged on the lower die substrate; the multiple groups of springs six abut against the side elastic plates one; the multiple groups of nitrogen gas springs four respectively abut against the stretching lower forming plate or the shaping lower forming plate; multiple groups of tie rods six are connected to the bottoms of the stretching lower forming plate, the shaping lower forming plate and the side elastic plates one, and the other ends of the multiple groups of tie rods six penetrate through the lower die backing plate two.

[0013] As a further solution of the present invention: the stretching lower die core is slidably arranged with the stretching lower forming plate, and the shaping lower die core is slidably arranged with the shaping lower forming plate.

[0014] As a further solution of the present invention: pilot pins are arranged in the punching and trimming module one, the stretching and shaping module, the punching and trimming module two, the flanging and shaping module and the cutting and flanging module.

[0015] As a further solution of the present invention: A cover plate processing process, using the above-mentioned cover plate processing die, includes the following steps: Step 1, Punching and Trimming 1: Through a servo feeder, feed the strip into the punching and trimming module 1, perform positioning hole punching, and after the positioning hole punching, move a step distance to perform the first trimming; Step 2, Stretching and Shaping: Send the strip after punching and trimming to the stretching and shaping module for stretching, and after stretching, move a step distance to perform shaping; Step 3, Punching and Trimming 2: Convey the shaped strip to the punching and trimming module 2, punch the main hole structure after shaping, and then move a step distance to perform the second trimming; Step 4, Flanging and Shaping: Convey the strip after the second trimming to the flanging and shaping module for flanging after punching the main hole structure, and then move a step distance to perform inner hole shaping; Step 5, Cutting and Flanging: Convey the strip after inner hole shaping to the cutting and flanging module to cut the strip and the product, and then perform flanging, and take away the formed product after flanging.

[0016] Advantages of the present invention:

[0017] By setting the punching and trimming module 1, stretching and shaping module, punching and trimming module 2, flanging and shaping module, and cutting and flanging module, the strip is processed sequentially along the processing direction through the above modules to realize the connection processing of the metal cover plate. And through the stretching and shaping module, the side steps and the main hole structure are first stretched with variable dimensions, and then shaped to the standard dimensions, avoiding cracking of the connection area caused by one-time stretching.

[0018] The shapes of multiple groups of trimming cutter heads 1 have different designed outer shapes at different positions, and multiple groups of trimming cutter heads 1 cooperate to cut the corresponding positions of the strip into a connecting part as shown in Figure 21 The connecting part has a bent connecting bar structure, which absorbs the vibration generated by the movement of the strip during the continuous processing process, facilitates the feeding of the strip during the subsequent stamping and forming process, and enables more accurate die closing and positioning of the relevant structures of the product during the subsequent flanging or inner hole shaping stage.

[0019] Variable-dimension stretching is performed between the stretching upper forming plate and the stretching lower forming plate of the present invention, and then a processing distance is advanced in steps. Shaping is performed between the shaping upper forming plate and the shaping lower forming plate. During the shaping process, the radius of the connection part and the depth of the side steps are the standard dimensions in the product drawing. It should be noted that the variable-dimension stretching and shaping are performed synchronously, and all the actions of the entire die are continuously set synchronously. The strip is continuously processed successively as it is conveyed by the servo feeder, and finally a continuous product is formed. Description of the Drawings

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the overall sectional structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the tape and metal cover plate of the present invention;

[0024] Figure 4 It is a schematic diagram of the metal cover plate of the present invention;

[0025] Figure 5 It is a schematic diagram of the overall structure of the upper die of the present invention;

[0026] Figure 6 It is a schematic diagram of the first upper die assembly of the present invention;

[0027] Figure 7 It is a schematic diagram of the top view of the first upper die assembly of the present invention;

[0028] Figure 8 It is Figure 7 A sectional structure schematic diagram at J-J in

[0029] Figure 9 It is Figure 7 A sectional structure schematic diagram at I-I in

[0030] Figure 10 It is a schematic diagram of the second upper die assembly of the present invention;

[0031] Figure 11 It is a schematic diagram of the top view of the second upper die assembly of the present invention;

[0032] Figure 12 It is Figure 11 A sectional structure schematic diagram at K-K in

[0033] Figure 13 It is a schematic diagram of the third upper die assembly of the present invention;

[0034] Figure 14 It is a schematic diagram of the top view of the third upper die assembly of the present invention;

[0035] Figure 15 It is Figure 14 A sectional structure schematic diagram at L-L in

[0036] Figure 16 It is a schematic diagram of the fourth upper die assembly of the present invention;

[0037] Figure 17 It is a schematic diagram of the top view of the fourth upper die assembly of the present invention;

[0038] Figure 18 It is Figure 17 A sectional structure schematic diagram at M-M in

[0039] Figure 19 is Figure 17 Schematic diagram of the sectional structure at N-N in the

[0040] Figure 20 Schematic diagram of the overall structure of the lower die of the present invention;

[0041] Figure 21 Schematic diagram of the overall structure of the lower die of the present invention combined with the strip;

[0042] Figure 22 Schematic diagram of the structure of the first component of the lower die of the present invention;

[0043] Figure 23 Schematic diagram of the sectional structure of the first component of the lower die of the present invention;

[0044] Figure 24 Schematic diagram of the structure of the second component of the lower die of the present invention;

[0045] Figure 25 Schematic diagram of the top view structure of the second component of the lower die of the present invention;

[0046] Figure 26 is Figure 25 Schematic diagram of the sectional structure at A-A in the

[0047] Figure 27 is Figure 25 Schematic diagram of the sectional structure at B-B in the

[0048] Figure 28 Schematic diagram of the structure of the third component of the lower die of the present invention;

[0049] Figure 29 Schematic diagram of the top view structure of the third component of the lower die of the present invention;

[0050] Figure 30 is Figure 29 Schematic diagram of the sectional structure at C-C in the

[0051] Figure 31 is Figure 29 Schematic diagram of the sectional structure at D-D in the

[0052] Figure 32 Schematic diagram of the structure of the fourth component of the lower die of the present invention;

[0053] Figure 33 Schematic diagram of the top view structure of the fourth component of the lower die of the present invention;

[0054] Figure 34 is Figure 33 Schematic diagram of the sectional structure at E-E in the

[0055] Figure 35 is Figure 33Schematic diagram of the cross-sectional structure at F-F in the [device / component name];

[0056] Figure 36 is Figure 33 Schematic diagram of the cross-sectional structure at G-G in the [device / component name];

[0057] Figure 37 Schematic diagram of the structure of the fifth lower die assembly of the present invention;

[0058] Figure 38 Schematic diagram of the top view structure of the fifth lower die assembly of the present invention;

[0059] Figure 39 is Figure 38 Schematic diagram of the cross-sectional structure at H-H in the [device / component name];

[0060] Figure 40 Schematic diagram of product cracking in the prior art.

[0061] In the figure: 1. Upper die base plate; 2. Punching and trimming module one; 21. Upper die assembly one; 211. Upper die bottom plate one; 212. Upper die intermediate plate one; 213. Upper die backing plate one; 214. Upper die forming plate; 215. Trimming cutter head one; 216. Pull rod one; 217. Spring one; 218. Nitrogen spring one; 219. Punch; 2110. Pilot pin; 22. Lower die assembly one; 221. Lower die backing plate one; 222. Lower die forming plate; 223. Trimming cutter seat; 224. Pusher plate; 225. Connecting seat; 226. Spring five; 3. Stretching and shaping module; 31. Upper die assembly two; 311. Upper die bottom plate two; 312. Upper die intermediate plate two; 313. Upper die backing plate two; 314. Side support plate one; 315. Stretching upper forming plate; 316. Shaping upper forming plate; 317. Stretching upper die core; 318. Shaping upper die core; 319. Nitrogen spring two; 3110. Pull rod two; 3111. Stretching boss forming surface; 3112. Shaping boss forming surface; 3113. Forming fillet; 32. Lower die assembly two; 321. Lower die backing plate two; 322. Side spring plate one; 323. Stretching lower forming plate; 324. Shaping lower forming plate; 325. Stretching lower die core; 326. Shaping lower die core; 327. Stretching boss; 328. Shaping boss; 329. Nitrogen spring four; 3210. Spring six; 3211. Pull rod six; 4. Punching and trimming module two; 41. Upper die assembly three; 411. Upper die bottom plate three; 412. Upper die intermediate plate three; 413. Upper die backing plate two; 414. Side support plate two; 415. Punching upper forming plate; 416. Trimming upper forming plate; 417. Trimming cutter head two; 418. Punching head; 419. Spring two; 4110. Pull rod three; 42. Lower die assembly three; 421. Lower die backing plate three; 422. Side spring plate two; 423. Punching upper forming plate one; 424. Punching lower die core; 425. Punching upper forming plate two; 426. Trimming lower forming plate; 427. Pusher plate one; 428. Positioning guide post one; 429. Spring seven; 4210. Pull rod seven; 4211. Pull rod eight; 4212. Spring eight; 5. Flanging and shaping module; 51. Upper die assembly four; 511. Upper die bottom plate four; 512. Upper die intermediate plate four; 513. Upper die backing plate four; 514. Side support plate three; 515. Flanging upper forming plate; 516. Inner hole shaping upper forming plate; 517. Elastic block; 518. Spring three; 519. Pull rod four; 5110. Spring four; 5111. Inner hole shaping block; 52. Lower die assembly four; 521. Lower die backing plate four; 522. Side spring plate three; 523. Flanging lower forming plate (523), Inner hole shaping lower forming plate; 525. Pusher plate two; 526. Pull rod nine; 527. Spring nine; 528. Positioning guide post two; 529. Spring ten; 5210. Positioning guide post three; 5211. Pull rod ten; 5212. Pull rod eleven; 5213. Spring eleven; 6. Cutting and flanging module; 61. Upper die assembly five; 611. Upper die bottom plate five;612. Upper die backing plate five; 613. Flanging upper forming plate; 614. Upper cutting-off knife; 615. Flanging upper die core; 616. Feeding belt knife; 617. Nitrogen spring three; 618. Pull rod five; 62. Lower die assembly five; 621. Lower die backing plate five; 622. Flanging lower forming plate; 623. Flanging lower die core; 624. Elastic core; 625. Lower cutting-off knife; 626. Discharging belt knife; 627. Stopper; 628. Positioning guide post four; 629. Pull rod twelve; 6210. Spring twelve; 6211. Spring thirteen; 6112 Pull rod thirteen; 7. Lower die base plate; 71. Discharging port; 8. Support plate; 9. Connecting bottom plate; 100. Belt; 101. Connecting part; 200. Metal cover plate; 201. Side step; 202. Main hole; Detailed implementation mode

[0062] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0063] Embodiment 1

[0064] As Figures 1 - 40 shown, this embodiment provides a cover plate processing mold, which is used to process the metal cover plate 200 as shown in Figure 3 and Figure 4 shown. The above-mentioned metal cover plate 200 includes a side step 201 surrounding the side, and a main hole 202 is provided on one side of the side step 201. The main hole 202 is close to the side step 201 and has a partial connection area. The mold in this embodiment includes an upper die base plate 1 and a lower die base plate 7. A continuous forming structure is provided between the upper die base plate 1 and the lower die base plate 7, including a punching and trimming module one 2, a stretching and shaping module three 3, a punching and trimming module two 4, a flanging and shaping module five 5, and a cutting-off and flanging module six 6. The belt 100 is processed in sequence along the processing direction through the above modules to realize the connection processing of the metal cover plate 200, and the side step 201 and the main hole 202 structure are first stretched with variable dimensions through the stretching and shaping module three 3, and then shaped to standard dimensions to avoid cracking of the connection area caused by one-time stretching (as shown in Figure 40 shown).

[0065] It should be noted in this embodiment that multiple groups of support plates 8 are provided below the lower die base plate 7 of this embodiment. Multiple groups of these support plates 8 are cooperatively connected with a connecting bottom plate 9, and the connecting bottom plate 9 is connected to the processing machine table. A plurality of blanking grooves are provided on the connecting bottom plate 9 for the blanking of trimming and punching waste during the continuous processing of the mold.

[0066] Preferably, as Figure 5 and Figure 20 shown, the above-mentioned punching and trimming module 1-2 includes an upper die assembly 1-21 and a lower die assembly 1-22. The upper die assembly 1-21 and the lower die assembly 1-22 cooperate to punch the positioning holes of the strip 100 and perform the first trimming. Among them, the upper die assembly 1-21 is specifically as Figures 6 - 9 shown. The upper die assembly 1-21 includes an upper die bottom plate 1-211 and an upper die intermediate plate 1-212 fixedly installed on the upper die substrate 1. The upper die intermediate plate 1-212 is located on the outside. An upper die backing plate 1-213 and an upper die forming plate 214 are sequentially arranged above the upper die intermediate plate 1-212, and the upper die backing plate 1-213 is arranged close to the upper die intermediate plate 1-212. The upper die backing plate 1-213 and the upper die forming plate 214 are fixedly connected by bolts, and a plurality of groups of tie rods 1-216 are connected to the bottom of the upper die backing plate 1-213. The other ends of the plurality of groups of tie rods 1-216 penetrate through the upper die bottom plate 1-211 and the upper die intermediate plate 1-212, and the end of the limit step extends into the corresponding installation holes opened on the upper die substrate 1. Specifically as Figure 8 shown, a plurality of groups of springs 1-217 are arranged on the upper die substrate 1, and the plurality of groups of springs 1-217 all penetrate through the upper die bottom plate 1-211 and the upper die intermediate plate 1-212 and abut against the upper die backing plate 1-213. Further, a plurality of groups of nitrogen springs 1-218 are also installed on the upper die substrate 1, and the moving ends of the plurality of groups of nitrogen springs 1-218 also abut against the upper die backing plate 1-213.

[0067] Through the cooperation of the plurality of groups of nitrogen springs 1-218 and the plurality of groups of springs 1-217, the upper die backing plate 1-213 and the upper die forming plate 214 can move elastically, and are limited and guided by guide posts during the moving process. And a plurality of groups of trimming cutter heads 1-215 are installed and arranged on the upper die bottom plate 1-211. The plurality of groups of trimming cutter heads 1-215 all penetrate through the upper die intermediate plate 1-212, the upper die backing plate 1-213 and the upper die forming plate 214 and extend to the outside. The trimming cutter head 1-215 is arranged at the corresponding position of the upper die forming plate 214 according to the required trimming shape, and a punch 219 is also arranged on the upper die intermediate plate 1-212 for punching and guiding holes on the side of the strip 100. Furthermore, guide pins 21-10 are symmetrically arranged at both ends of the rear working positions of the upper die forming plate 214 along the processing direction with respect to the punch 219. After stepping one processing unit, the guide pins 21-10 cooperate with the front guide holes to position and guide the strip 100.

[0068] In the mold opening stage, the upper die forming plate 214 moves outward under the elastic force, so that the bottom surfaces of the trimming cutter head 1-215 and the punch 219 are flush with the forming surface of the upper die forming plate 214, while the guide pins 21-10 protrude from the forming surface of the upper die forming plate 214 and preferentially contact the guide holes for guiding during mold closing.

[0069] Preferably, as Figures 21 - 23As shown in the figure, in this embodiment, the lower die assembly 1 22 includes a lower die backing plate 1 221 and a lower die forming plate 222 disposed on the lower die substrate 7. Multiple sets of trimming knife seats 223 and punching seats are arranged on the lower die forming plate 222 corresponding to the positions of the first trimming cutter head 215 and the punch 219. Cuts are provided in the middle of the trimming knife seats 223 and the punching seats to cooperate with the corresponding first trimming cutter head 215 and the punch 219. And a corresponding clearance opening is provided on the lower die backing plate 1 221 to make the cuts penetrate up and down, realizing trimming and blanking. Further, a plurality of fifth springs 226 are disposed on the lower die substrate 7. The plurality of fifth springs 226 are grouped in pairs. A set of fifth springs 226 is cooperatively connected to a connecting seat 225. A push block 224 is installed at the top of the connecting seat 225. And through holes penetrating up and down are provided on the lower die backing plate 1 221 and the lower die forming plate 222 corresponding to each set of push blocks 224, facilitating the ejection of the push blocks 224. When the mold is opened, the strip 100 is pushed up by a set distance to cooperate with an external servo feeder for a step of a processing unit.

[0070] It should be further noted that the shapes of the multiple sets of the first trimming cutter heads 215 in this embodiment have different designed outer shapes at different positions, and the multiple sets of the first trimming cutter heads 215 cooperate to cut the corresponding positions of the strip 100 into a connecting portion 101 as shown in Figure 21 the figure. The connecting portion 101 has a bent connecting strip structure, which absorbs the vibration generated by the movement of the strip 100 during the continuous processing, facilitates the feeding during the subsequent stamping and forming process, and enables more accurate die closing positioning of the relevant structures of the product (such as the side step 201 and the main hole 202) during the subsequent hole flanging or inner hole shaping stage (with a slight adjustment of the position and a more precise fit of the relevant structures).

[0071] When the first punching and trimming module 2 works, the strip 100 is conveyed between the upper die assembly 2 31 and the lower die assembly 2 32 by an external servo feeder, and is sequentially stepped according to the designed step distance of the product to realize punching and primary trimming. The upper die assembly 2 31 moves downward, driving the first trimming cutter head 215 and the punch 219 to move downward. The upper die forming plate 214 contacts the push block 224 and continues to move downward and squeeze. The upper die forming plate 214 and the push block 224 contract, causing the first trimming cutter head 215 and the punch 219 to protrude. The first trimming cutter head 215 cooperates with the trimming knife seat 223 and the punch 219 cooperates with the punching seat to process the corresponding position of the strip.

[0072] Preferably, as shown in Figure 5 and Figure 20 the figure, the above-mentioned stretching and shaping module 3 includes an upper die assembly 2 31 and a lower die assembly 2 32, and the upper die assembly 2 31 and the lower die assembly 2 32 cooperate to realize the stretching and shaping of the strip 100. Specifically, as shown in Figures 10 - 12As shown in the figure, the above-mentioned upper die assembly two 31 includes an upper die bottom plate two 311 fixedly installed on the upper die base plate 1 and an upper die intermediate plate two 312. An upper die cushion plate two 313 is arranged above the upper die intermediate plate two 312. Side support plates one 314 are symmetrically arranged on both sides of the upper die cushion plate two 313. A stretching upper forming plate 315 and a shaping upper forming plate 316 are arranged between the two side support plates one 314. Among them, the side support plates one 314, the stretching upper forming plate 315 and the shaping upper forming plate 316 are all fixed to the upper die cushion plate two 313 by bolts, and the stretching upper forming plate 315 is close to the punching and trimming module one 2. A stretching upper die core 317 and a shaping upper die core 318 are fixedly arranged on the upper die intermediate plate two 312. Among them, the stretching upper die core 317 penetrates through the stretching upper forming plate 315 and is located in the middle of the stretching upper forming plate 315. The shaping upper die core 318 penetrates through the shaping upper forming plate 316 and is located in the middle of the shaping upper forming plate 316. Multiple groups of tie rods two 3110 are arranged on the upper die cushion plate two 313. The other ends of the multiple groups of tie rods two 3110 penetrate through the upper die bottom plate two 311 and the upper die intermediate plate two 312, and the end parts of the limiting steps extend into the corresponding installation holes opened on the upper die base plate 1, specifically as Figure 12 shown. Multiple groups of nitrogen gas springs two 319 are installed on the upper die base plate 1. The multiple groups of nitrogen gas springs two 319 all penetrate through the upper die bottom plate two 311 and the upper die intermediate plate two 312, and the telescopic ends of the multiple groups of nitrogen gas springs two 319 are abutted against the upper die cushion plate two 313, so that the upper die cushion plate two 313, the side support plates one 314, the stretching upper forming plate 315 and the shaping upper forming plate 316 can move elastically. Among them, the stretching upper forming plate 315 and the shaping upper forming plate 316 move along the stretching upper die core 317 and the shaping upper die core 318.

[0073] In the mold opening stage, the upper die cushion plate two 313 drives the stretching upper forming plate 315 and the shaping upper forming plate 316 to move under the elastic force. Further, the stretching upper forming plate 315 is provided with a stretching boss forming surface 3111, and the shaping upper forming plate 316 is provided with a shaping boss forming surface 3112. Among them, the depth of the shaping boss forming surface 3112 is 1-2 strip 100 thicknesses deeper than that of the stretching boss forming surface 3111, and the stretching upper die core 317 has a forming fillet 3113. The forming fillet 3113 connects the side step 201 and the main hole 202. The radius of the forming fillet 3113 is twice the standard size fillet radius on the shaping upper die core 318. By enlarging the fillet and reducing the depth of the stretching boss forming surface 3111, the feeding of the raw material is easier during stretching, thereby avoiding cracking at the connection.

[0074] Further, as Figures 24 - 27As shown in the figure, the lower die assembly two 32 of this embodiment includes a lower die backing plate two 321 connected to the lower die base plate 7. On both sides of the lower die backing plate two 321, there are symmetrically arranged side spring plates one 322. Between the two side spring plates one 322, there are arranged a stretching lower forming plate 323 and a sizing lower forming plate 324. Among them, the stretching lower forming plate 323 is close to the punching and trimming module one 2, and on the lower die backing plate two 321, there are fixedly arranged a stretching lower die core 325 and a sizing lower die core 326. The stretching lower die core 325 is slidably arranged with the stretching lower forming plate 323 and is located in the middle of the stretching lower forming plate 323. The sizing lower die core 326 is slidably arranged with the sizing lower forming plate 324 and is located in the middle of the sizing lower forming plate 324. And on the top of the stretching lower die core 325, there is arranged a stretching boss 327, and on the top of the sizing lower die core 326, there is arranged a sizing boss 328. The stretching boss 327 and the sizing boss 328 are used for stretching and sizing the main hole 202. And on the lower die base plate 7, there are arranged multiple groups of springs six 3210. The other ends of the multiple groups of springs six 3210 are abutted against the side spring plates one 322. Below the lower die base plate 7, there are arranged multiple groups of nitrogen gas springs four 329. The bottom of the nitrogen gas springs four 329 is connected to the connecting base plate 9 through support columns. The movable ends of the multiple groups of nitrogen gas springs four 329 are connected with ejector rods. The multiple groups of these ejector rods penetrate through the lower die backing plate two 321 and are respectively connected to the stretching lower forming plate 323 or the sizing lower forming plate 324 to push the stretching lower forming plate 323 and the sizing lower forming plate 324 to move. And at the bottoms of the stretching lower forming plate 323, the sizing lower forming plate 324 and the side spring plates one 322, there are connected multiple groups of tie rods six 3211. The other ends of the multiple groups of tie rods six 3211 penetrate through the lower die backing plate two 321, and the limiting step ends extend into the corresponding mounting holes opened on the lower die base plate 7.

[0075] When the stretching and sizing module 3 is working, the strip 100 will step the strip plate that has undergone positioning hole punching and first trimming between the upper die assembly two 31 and the lower die assembly two 32. The upper die assembly two 31 moves downward. The stretching upper forming plate 315 and the sizing upper forming plate 316 respectively contact the corresponding stretching lower forming plate 323 and sizing lower forming plate 324. With the continuous downward extrusion, the mold closing is completed. During the mold closing process, the strip plate in the forming area is gradually formed. Variable-size stretching (the radius at the connection and the depth of the side step 201) is carried out between the stretching upper forming plate 315 and the stretching lower forming plate 323. Then, it steps another processing distance, and sizing is carried out between the sizing upper forming plate 316 and the sizing lower forming plate 324. During the sizing process, the radius at the connection and the depth of the side step 201 are the standard dimensions in the product drawing. And it should be noted that the variable-size stretching and sizing are carried out synchronously. All the actions of the entire mold are continuously set synchronously. The strip 100 is continuously processed in sequence as it is conveyed by the servo feeder, and finally, a continuous product is formed.

[0076] Preferably, as Figure 5 andFigure 20 As shown, the above-mentioned punching and trimming module II 4 includes an upper die assembly III 41 and a lower die assembly III 42, and the upper die assembly III 41 and the lower die assembly III 42 cooperate to punch and trim the product after stretching and shaping. Specifically, as Figures 13 - 15 shown, the upper die assembly III 41 in this embodiment includes an upper die bottom plate III 411 fixed on the lower die base plate 7 and an upper die intermediate plate III 412. An upper die backing plate II 413 is arranged on the upper die intermediate plate III 412. Multiple groups of tie rods III 4110 are arranged at the bottom of the upper die backing plate II 413. The other ends of the multiple groups of tie rods III 4110 penetrate through the upper die bottom plate III 411 and the upper die intermediate plate III 412, and the limiting boss ends of the tie rods III 4110 extend into the installation holes correspondingly opened in the lower die base plate 7. Multiple groups of springs II 419 are arranged on the lower die base plate 7. The multiple groups of springs II 419 penetrate through the upper die bottom plate III 411 and the upper die intermediate plate III 412 and abut against the upper die backing plate II 413. Side support plates II 414 are symmetrically installed at both ends of the upper die backing plate II 413. A punching upper forming plate 415 and a trimming upper forming plate 416 are arranged between the two side support plates II 414. Among them, the punching upper forming plate 415 is close to the stretching and shaping module 3. A trimming cutter head II 417 and a punching head 418 are arranged on the upper die bottom plate III 411. Among them, multiple groups of trimming cutter heads II 417 are arranged. The multiple groups of trimming cutter heads II 417 all penetrate through the upper die intermediate plate III 412 and the upper die backing plate II 413 and further penetrate through the punching upper forming plate 415 or the trimming upper forming plate 416. When the die is closed, it protrudes from the forming surface to perform secondary trimming on the product. And the above-mentioned punching head 418 penetrates through the upper die intermediate plate III 412, the upper die backing plate II 413 and the punching upper forming plate 415 to punch the blind hole structure formed after stretching the main hole 202 in the front-end process to form a through hole.

[0077] The movement of the upper die backing plate II 413 is driven by the cooperation of multiple groups of springs II 419. The upper die backing plate II 413 drives the punching upper forming plate 415 and the trimming upper forming plate 416 to move. When the die is opened, the upper die backing plate II 413 is forced to move outwards, driving the trimming cutter head II 417 and the punching head 418 to cooperate with the lower die assembly III 42 to complete the processing.

[0078] As Figures 28 - 31 shown, the lower die assembly III 42 in this embodiment includes a lower die backing plate III 421 connected to the lower die base plate 7. Side spring plates II 422 are symmetrically arranged on both sides of the lower die backing plate III 421. A punching lower forming plate I 423, a punching lower forming plate II 425 and a trimming lower forming plate 426 are sequentially arranged between the two side spring plates II 422. And a push plate I 427 is arranged in the middle of the trimming lower forming plate 426. Among them, the punching lower forming plate I 423 is arranged close to the stretching and shaping module 3. A punching lower die core 424 is arranged on the punching lower forming plate I 423. The punching lower die core 424 cooperates with the punching head 418 to complete the processing of the blind hole structure during the processing of the main hole 202.

[0079] A plurality of sets of spring eight 4212 are arranged on the lower die substrate 7. The plurality of sets of spring eight 4212 penetrate through the lower die backing plate three 421 and abut against the side spring plate two 422. The spring eight 4212 is arranged corresponding to the side spring plate two 422, and a plurality of sets of pull rods eight 4211 are connected to the bottom of the side spring plate two 422. A plurality of sets of spring seven 429 are also arranged on the lower die substrate 7. The plurality of sets of spring seven 429 penetrate through the lower die backing plate three 421 and abut against the push plate one 427. A plurality of sets of pull rods seven 4210 and positioning guide posts one 428 are connected to the push plate one 427. The positioning guide post one 428 penetrates through the lower die backing plate three 421 and extends into the lower die substrate 7, and a guide sleeve is arranged inside the lower die substrate 7 to cooperate with it. The other ends of the plurality of sets of pull rods seven 4210 and the plurality of sets of pull rods eight 4211 penetrate through the lower die backing plate three 421 and extend into the mounting holes correspondingly opened on the lower die substrate 7.

[0080] Further, it should be noted that in this embodiment, a hole is opened in the middle of the punching lower die core 424, and this hole is adapted to the punching head 418. When the punching and trimming module two 4 works, the upper die backing plate two 413 moves downward. The upper die backing plate two 413 drives the punching upper forming plate 415 and the trimming upper forming plate 416 to move downward, contact with the side spring plate two 422 and the push plate one 427, and continue to squeeze. The punching upper forming plate 415, the trimming upper forming plate 416, the side spring plate two 422 and the push plate one 427 that can move elastically contract until the mold is closed, and the trimming cutter head two 417 and the punching head 418 protrude to punch and trim the blanking plate that has passed through the stretching and shaping module 3.

[0081] Preferably, as Figure 5 and Figure 20 shown, the above-mentioned hole flanging and shaping module 5 includes an upper die assembly four 51 and a lower die assembly four 52, and the hole flanging and inner hole shaping of the product that has undergone secondary punching and trimming are realized through the cooperation of the upper die assembly four 51 and the lower die assembly four 52.

[0082] Among them, as Figures 16 - 19As shown in the figure, the upper die assembly four 51 in this embodiment includes an upper die bottom plate four 511 fixed on the upper die substrate 1 and an upper die intermediate plate four 512. An upper die cushion plate four 513 is arranged above the upper die intermediate plate four 512. A plurality of pull rods four 519 are arranged at the bottom of the upper die cushion plate four 513. The other ends of the plurality of pull rods four 519 penetrate through the upper die bottom plate four 511 and the upper die intermediate plate four 512, and the limiting boss ends of the pull rods four 519 extend into the upper die substrate 1. A plurality of springs three 518 are arranged on the upper die substrate 1. The plurality of springs three 518 penetrate through the upper die bottom plate four 511 and the upper die intermediate plate four 512 and abut against the upper die cushion plate four 513 to realize the elastic movement of the upper die cushion plate four 513. Side support plates three 514 are symmetrically arranged at both ends of the upper die cushion plate four 513. A flanging upper forming plate 515 and an inner hole sizing upper forming plate 516 are arranged between the two side support plates three 514. The flanging upper forming plate 515 is close to the punching and trimming module two 4. A spring four 5110 is arranged on the upper die substrate 1 at the position corresponding to the flanging upper forming plate 515, and a spring block 517 is arranged above the spring four 5110. The spring block 517 penetrates through the upper die bottom plate four 511, the upper die intermediate plate four 512, the upper die cushion plate four 513 and the flanging upper forming plate 515. An inner hole sizing block 5111 is installed on the upper die bottom plate four 511. The inner hole sizing block 5111 penetrates through the upper die intermediate plate four 512, the upper die cushion plate four 513 and the inner hole sizing upper forming plate 516 to size and round the main hole 202 after flanging treatment through the inner hole sizing block 5111.

[0083] As Figures 32 - 36 shown in the figure, the lower die assembly four 52 in this embodiment includes a lower die cushion plate four 521 arranged on the lower die substrate 7. Side spring plates three 522 are symmetrically arranged at both ends of the lower die cushion plate four 521. A flanging lower forming plate 523 and an inner hole sizing lower forming plate 524 are arranged between the two side spring plates three 522. A push plate two 525 is arranged in the middle of the lower die cushion plate four 521. The flanging lower forming plate 523 is close to the punching and trimming module two 4. A flanging boss is arranged on the flanging lower forming plate 523. The diameter of the flanging boss is larger than the diameter of the punching head 418, and the diameter of the flanging boss is equal to the diameter of the main hole 202 in the product design drawing. It cooperates with the spring block 517 to perform flanging treatment during mold closing (the flanging change can be referred to Figure 21changes in the main hole 202 of the product). A plurality of groups of springs nine 527 are arranged on the lower die base plate 7. The plurality of groups of springs nine 527 penetrate through the lower die backing plate four 521 and abut against the flanging lower forming plate 523. And a plurality of groups of tie rods nine 526 are arranged on the bottom surface of the flanging lower forming plate 523. The other ends of the plurality of groups of tie rods nine 526 penetrate through the lower die backing plate four 521 and extend into the installation limit holes correspondingly opened on the lower die base plate 7. A plurality of groups of positioning guide posts two 528 are also arranged on the flanging lower forming plate 523. The positioning guide posts two 528 penetrate through the lower die backing plate four 521 and are guided by the bushings arranged in the lower die base plate 7 to realize the guiding and positioning of the movement of the flanging lower forming plate 523.

[0084] Further, a plurality of groups of springs ten 529 are arranged on the lower die base plate 7 corresponding to the position of the push plate two 525. The other ends of the plurality of groups of springs ten 529 penetrate through the lower die backing plate four 521 and abut against the push plate two 525. And a plurality of groups of positioning guide posts three 5210 and tie rods ten 5211 are arranged at the bottom of the push plate two 525. Wherein the other ends of the plurality of groups of tie rods ten 5211 penetrate through the lower die backing plate four 521 and extend into the installation holes correspondingly opened on the lower die base plate 7. And the plurality of groups of positioning guide posts three 5210 also penetrate through the lower die backing plate four 521 and are slidably matched with the bushings arranged in the lower die base plate 7. A plurality of groups of springs eleven 5213 are arranged on the lower die base plate 7 corresponding to the position of the side spring plate three 522. The plurality of groups of springs eleven 5213 penetrate through the lower die backing plate four 521 and abut against the side spring plate three 522 to provide the elastic force during mold opening. And a plurality of groups of tie rods eleven 5212 are arranged at the bottom of the side spring plate three 522. The plurality of groups of tie rods eleven 5212 limit the ejection distance during mold opening. And the other ends of the plurality of groups of tie rods eleven 5212 penetrate through the lower die backing plate four 521 and extend into the installation holes correspondingly opened on the lower die base plate 7.

[0085] When the flanging and sizing module 5 works, the upper die backing plate four 513 moves downward, and the flanging upper forming plate 515 and the inner hole sizing upper forming plate 516 move downward until they contact the push plate two 525. Continue to close the mold, the push plate two 525, the flanging upper forming plate 515 and the inner hole sizing upper forming plate 516 contract, and the flanging boss flanges the main hole 202 after punching. Synchronously, the previous product after flanging processing is sized by the inner hole sizing block 5111.

[0086] Preferably, as Figure 5 and Figure 20 shown, the above-mentioned cutting and flanging module 6 includes an upper die assembly five 61 and a lower die assembly five 62, and cuts and flanges the product after flanging and sizing through the upper die assembly five 61 and the lower die assembly five 62. Among them, as Figures 16 - 19As shown in the figure, the above-mentioned upper die assembly five 61 includes an upper die bottom plate five 611 fixed on the upper die substrate 1 and an upper die backing plate five 612. An upward flanging forming plate 613 is arranged on the upper die backing plate five 612. An upward flanging upper die core 615 is movably arranged on the upper die backing plate five 612. The upward flanging upper die core 615 is movably arranged in the middle of the upward flanging forming plate 613. And a plurality of groups of pull rods five 618 are connected to the bottom of the upward flanging upper die core 615. The other ends of the plurality of groups of pull rods five 618 penetrate through the upper die bottom plate five 611 and the upper die backing plate five 612 and extend into the corresponding mounting holes on the upper die substrate 1. A plurality of groups of nitrogen springs three 617 are arranged on the upper die substrate 1. The movable ends of the plurality of groups of nitrogen springs three 617 penetrate through the upper die bottom plate five 611 and the upper die backing plate five 612 and abut against the upward flanging upper die core 615. The movement of the upward flanging upper die core 615 is realized through the cooperation of the pull rods five 618 and the nitrogen springs three 617. Further, an upper cutting knife 614 is arranged at the position of the connecting part 101 of the upward flanging forming plate 613 corresponding to the strip 100. Upper strip knives 616 are arranged on both sides of the advancing direction of the strip 100.

[0087] Further, as Figures 37 - 39 shown in the figure, the above-mentioned lower die assembly five 62 includes a lower die backing plate five 621 fixed on the lower die substrate 7. A downward flanging forming plate 622 is arranged on the lower die backing plate five 621. A downward flanging lower die core 623 is also fixed on the lower die backing plate five 621. The downward flanging lower die core 623 is arranged in the middle of the downward flanging forming plate 622. A spring core 624 is arranged in the middle of the downward flanging lower die core 623. And a plurality of groups of spring twelve 6210 and spring thirteen 6211 are arranged on the lower die substrate 7. Among them, the plurality of groups of spring twelve 6210 correspond to the position of the spring core 624, and the plurality of groups of spring thirteen 6211 correspond to the position of the downward flanging forming plate 622. Among them, the spring twelve 6210 penetrates through the lower die backing plate five 621 and abuts against the spring core 624, and the spring thirteen 6211 penetrates through the lower die backing plate five 621 and abuts against the downward flanging forming plate 622. And a plurality of groups of pull rods thirteen 6112 and pull rods twelve 629 are respectively arranged at the bottoms of the downward flanging forming plate 622 and the spring core 624. The plurality of groups of pull rods thirteen 6112 and pull rods twelve 629 both penetrate through the lower die backing plate five 621 and extend into the corresponding mounting holes arranged on the lower die substrate 7. And a positioning guide post four 628 is also arranged at the bottom of the spring core 624. The positioning guide post four 628 penetrates through the lower die backing plate five 621 and is in sliding fit with the guide sleeve arranged on the lower die substrate 7.

[0088] Furthermore, a lower cutting knife 625 and a lower strip knife 626 are correspondingly arranged on the lower die substrate 7. Among them, the lower cutting knife 625 and the lower strip knife 626 respectively correspond to the upper cutting knife 614 and the upper strip knife 616 to realize the cutting of the connecting part 101 and the strip 100.

[0089] When the cutting and flanging module 6 is working, the upper die assembly five 61 moves downward. The upper die backing plate five 612 drives the flanging upper die core 615 to contact the spring core 624, and further drives the upper cutting knife 614 and the upper strip knife 616 to contact the lower cutting knife 625 and the lower strip knife 626, so as to cut off the connecting part 101 and the strip 100. After cutting, continue to close the die to complete the flanging process of the side.

[0090] It should be noted that in this embodiment, the punching and trimming module one 2, the stretching and shaping module 3, the punching and trimming module two 4, the hole flanging and shaping module 5, and the cutting and flanging module 6 open and close the die synchronously to realize the continuous processing of the strip 100. And by setting the stretching and shaping module 3, the main hole 202 of the product and the side step 201 are formed by variable-size stretching and subsequent shaping stamping, avoiding cracking at the connection. And in this embodiment, by setting the pilot pins 2110 on the upper die of each module, the guiding and positioning of the strip are realized, and the shape of the trimming cutter head one 215 as shown in Figure 6 is adopted to cut the connection between the strip 100 and the product into the connecting part 101, absorb the vibration generated by the movement of the strip 100, and facilitate the feeding during the subsequent stamping process.

[0091] Embodiment Two

[0092] This embodiment provides a processing technology for a cover plate. Using the processing die in Embodiment One, it includes the following steps;

[0093] Step 1, Punching and Trimming One: Through the servo feeder, the strip 100 is fed between the punching and trimming module one 2 for punching the positioning holes. After punching the positioning holes, move a step distance for the first trimming.

[0094] Step 2, Stretching and Shaping: Send the strip 100 after punching and trimming to the stretching and shaping module 3 for stretching. After stretching, move a step distance for shaping.

[0095] Step 3, Punching and Trimming Two: Transport the shaped strip 100 to the punching and trimming module two 4 to punch the structure of the main hole 202 after shaping. Then move a step distance for the second trimming.

[0096] Step 4, Hole Flanging and Shaping: Transport the strip 100 after the second trimming to the hole flanging and shaping module 5 for hole flanging after punching the structure of the main hole 202. Then move a step distance for inner hole shaping.

[0097] Step 5, Cutting and Flanging: Transport the strip 100 after inner hole shaping to the cutting and flanging module 6 to cut off the strip and the product, and then perform flanging. After flanging, take away the formed product.

[0098] The above has described an embodiment of the present invention in detail, but the above content is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A cover plate processing die for processing a metal cover plate (200), comprising an upper die base plate (1) and a lower die base plate (7), characterized in that, A continuous forming structure is provided between the upper die substrate (1) and the lower die substrate (7): The continuous forming structure includes a punching and trimming module one (2), a stretching and shaping module (3), a punching and trimming module two (4), a hole flanging and shaping module (5), and a cutting and flanging module (6); Among them, the stretching and shaping module (3) performs variable-size stretching and shaping on the strip (100).

2. The cover plate processing die according to claim 1, characterized in that, The punching and trimming module one (2) includes an upper die assembly one (21) and a lower die assembly one (22); The upper die assembly one (21) includes an upper die bottom plate one (211) and an upper die intermediate plate one (212). An upper die backing plate one (213) and an upper die forming plate (214) are arranged above the upper die intermediate plate one (212). A plurality of groups of trimming cutter heads one (215) are arranged on the upper die bottom plate one (211), and the plurality of groups of trimming cutter heads one (215) all penetrate through the upper die intermediate plate one (212), the upper die backing plate one (213), and the upper die forming plate (214) and extend to the outside; The lower die assembly one (22) includes a lower die backing plate one (221) and a lower die forming plate (222). A plurality of groups of trimming cutter seats (223) are arranged on the lower die forming plate (222); The plurality of groups of trimming cutter seats (223) cooperate with the plurality of groups of trimming cutter heads one (215) to cut the strip (100) to form a connecting portion (101).

3. A cover plate processing die according to claim 1, characterized in that, The stretching and shaping module (3) includes an upper die assembly two (31) and a lower die assembly two (32); The upper die assembly two (31) includes an upper die bottom plate two (311) and an upper die intermediate plate two (312). An upper die backing plate two (313) is arranged above the upper die intermediate plate two (312). A stretching upper forming plate (315) and a shaping upper forming plate (316) are arranged on the upper die backing plate two (313). A stretching upper die core (317) and a shaping upper die core (318) are arranged on the upper die intermediate plate two (312); The lower die assembly two (32) includes a lower die backing plate two (321). A stretching lower forming plate (323) and a shaping lower forming plate (324) are arranged on the lower die backing plate two (321). A stretching lower die core (325) and a shaping lower die core (326) are arranged on the lower die backing plate two (321); And a stretching boss (327) is arranged at the top of the stretching lower die core (325), and a shaping boss (328) is arranged at the top of the shaping lower die core (326).

4. A cover plate processing die according to claim 3, characterized in that, A plurality of groups of pull rods two (3110) are arranged on the upper die backing plate two (313), and the other ends of the plurality of groups of pull rods two (3110) penetrate through the upper die bottom plate two (311) and the upper die intermediate plate two (312) and are arranged; A plurality of groups of nitrogen gas springs two (319) are installed on the upper die substrate (1), and the plurality of groups of nitrogen gas springs two (319) all penetrate through the upper die bottom plate two (311) and the upper die intermediate plate two (312) and abut against the upper die backing plate two (313).

5. A cover plate processing die according to claim 4, characterized in that, The stretching upper forming plate (315) is provided with a stretching boss forming surface (3111), and the shaping upper forming plate (316) is provided with a shaping boss forming surface (3112); The depth of the shaping boss forming surface (3112) is 1-2 strip (100) thicknesses deeper than that of the stretching boss forming surface (3111).

6. The cover plate processing die according to claim 5, characterized in that, The stretching upper die core (317) has a forming fillet (3113), and the forming fillet (3113) connects the side step (201) of the metal cover plate (200) and the main hole (202), and the radius of the forming fillet (3113) is greater than the radius of the standard size fillet.

7. A cover plate processing die according to claim 6, characterized in that, Side spring plates one (322) are symmetrically arranged on both sides of the lower die backing plate two (321), and multiple groups of springs six (3210) and multiple groups of nitrogen springs four (329) are arranged on the lower die base plate (7); Multiple groups of the springs six (3210) are in contact with the side spring plates one (322); Multiple groups of the nitrogen springs four (329) are respectively in contact with the stretching lower forming plate (323) or the shaping lower forming plate (324); Multiple groups of tie rods six (3211) are connected to the bottoms of the stretching lower forming plate (323), the shaping lower forming plate (324) and the side spring plates one (322), and the other ends of the multiple groups of tie rods six (3211) penetrate through the lower die backing plate two (321).

8. A cover plate processing die according to claim 3 or 7, characterized in that, The stretching lower die core (325) is slidably arranged with the stretching lower forming plate (323), and the shaping lower die core (326) is slidably arranged with the shaping lower forming plate (324).

9. A cover plate processing die according to claim 1, characterized in that, Alignment pins (2110) are arranged in the punching and trimming module one (2), the stretching and shaping module (3), the punching and trimming module two (4), the hole flanging and shaping module (5) and the cutting and flanging module (6).

10. A cover plate processing technology, characterized in that, Using the cover plate processing die according to any one of claims 1-9, comprising the following steps: Step 1, punching and trimming one: Through the servo feeder, the strip (100) is fed between the punching and trimming module one (2) to punch the positioning holes. After punching the positioning holes, it moves a step distance to perform the first trimming; Step 2, stretching and shaping: The strip (100) after punching and trimming is sent to the stretching and shaping module (3) for stretching. After stretching, it moves a step distance to perform shaping; Step 3, punching and trimming two: The shaped strip (100) is conveyed to the punching and trimming module two (4) to punch the structure of the main hole (202) after shaping, and then moves a step distance to perform the second trimming; Step 4, hole flanging and shaping: The strip (100) after the second trimming is conveyed to the hole flanging and shaping module (5) to perform hole flanging after punching the structure of the main hole (202), and then moves a step distance to perform inner hole shaping; Step 5, cutting and flanging: The strip (100) after inner hole shaping is conveyed to the cutting and flanging module (6) to cut the strip (100) and the product, and then perform flanging. After flanging, the formed product is taken away.

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