A plate processing punch forming die

Abstract

The present application relates to the technical field of wire rod stamping equipment, and specifically discloses a plate processing stamping forming die, which comprises a bottom die assembly, one side of the bottom die assembly is fixed with a stamping assembly, the bottom die assembly performs stamping on raw materials through the stamping assembly, the stamping assembly is internally fixed with a buffer assembly, the stamping assembly stably performs stamping force on the raw materials through the buffer assembly, one side of the stamping assembly is fixed with a feeding assembly, the other side of the stamping assembly is fixed with a winding assembly, the bottom die assembly feeds the raw materials through the feeding assembly and winds waste materials through the winding assembly, one side of the winding assembly away from the stamping assembly is fixed with a tightening assembly, and the winding assembly tightens the waste materials through the tightening assembly. The forming die has a good protection effect on the hydraulic system during stamping, can prevent overpressure from causing damage to the punch and the like, and can improve the efficiency and safety of wire rod stamping through the overall structure.

Description

Technical Field

[0001] This invention relates to the field of wire stamping equipment technology, specifically a sheet metal stamping forming mold. Background Technology

[0002] Stamping is a forming process that uses pressure and dies to apply external force to sheet metal, strip, tube, etc., causing plastic deformation or separation to obtain workpieces of the required shape and size. Most stamping machines nowadays do not have protection against the applied pressure, resulting in the same force for each stamping. This leads to the punch not moving down smoothly and at a uniform speed when stamping thicker aluminum plates, while the hydraulic cylinder is continuously working, making it easy to damage the punch. Furthermore, current stamping equipment cannot effectively coil up scrap material.

[0003] Chinese Patent No. CN119187318A provides a stamping forming equipment for processing aluminum sheets, including a base. Two fixed frames are fixedly installed on the upper side of the base, and a stamping device is fixedly installed on the fixed frames. A stamping head is fixedly installed on the lower side of the output shaft of the stamping device. A placement groove is opened on the upper side of the base, and a concave mold is set in the placement groove. By placing the aluminum sheet to be stamped on the conveying device, the conveying device will drive the aluminum sheet forward to the two support bars. Then, the aluminum sheet on the support plate will be pushed by the aluminum sheet behind it to the concave mold. At the same time, the aluminum sheet will be blocked by the two limiting bars. Then, the stamping head will move downward to stamp the aluminum sheet. After the aluminum sheet is formed, it is concave downward, so the two limiting bars can no longer block the aluminum sheet. As a result, the aluminum sheet behind it will push the formed aluminum sheet to fall off. This continuous feeding and unloading process improves work efficiency.

[0004] However, although the above-mentioned case can stamp the aluminum sheet into a concave shape in one go, it does not provide good protection for the hydraulic system during stamping. This can easily lead to damage to the punch under continuous work of the hydraulic cylinder. Furthermore, the replacement of punches and dies is too cumbersome.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a stamping die for sheet metal processing in order to solve the above-mentioned problems.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] A sheet metal stamping die includes a bottom die assembly. A stamping assembly is fixed to one side of the bottom die assembly, and the bottom die assembly stamps the raw material through the stamping assembly. A buffer assembly is fixed inside the stamping assembly, and the stamping assembly stabilizes the stamping force on the raw material through the buffer assembly. A feeding assembly is fixed to one side of the stamping assembly, and a winding assembly is fixed to the other side of the stamping assembly. The bottom die assembly conveys the raw material through the feeding assembly and winds up the waste material through the winding assembly. A tightening assembly is fixed to the side of the winding assembly away from the stamping assembly, and the winding assembly tightens the waste material through the tightening assembly.

[0009] In a further embodiment, the buffer assembly includes a protective box fixed inside the stamping assembly. An oil outlet is provided on the side wall of the protective box. The stamping assembly supplies pressurized oil for stamping the sheet metal through the oil outlet. A lead screw is rotatably connected to the protective box. A handle is fixed to one end of the lead screw, and a first limiting block is fixed to the other end. A baffle is slidably connected to the end of the lead screw near the first limiting block. The baffle is slidably connected to the inner wall of the protective box and located on one side of the oil outlet. A first spring is elastically connected between the baffle and the inner wall of the protective box near the handle end. A first sealing ring is fitted onto one side of the baffle, and a second sealing ring is fitted onto the other side of the baffle.

[0010] In a further embodiment, the stamping assembly includes a base frame, which is fixed to one side of the bottom mold assembly. An oil tank is fixed inside the base frame, and a hydraulic pump is connected to the oil tank. The hydraulic pump introduces high-pressure oil into the oil tank, and the protection box distributes pressurized oil through the oil tank.

[0011] In a further embodiment, a hydraulic cylinder is fixedly connected to the upper surface of the base frame, and the oil outlet of the protection box is connected to the hydraulic cylinder and the oil tank respectively through an oil supply pipe. The hydraulic cylinder supplies pressurized oil through the oil supply pipe, and a slide is fixed to the movable end of the hydraulic cylinder. The slide is slidably connected inside the base frame, and a second limiting frame is fixed to the bottom of the slide.

[0012] In a further embodiment, a mold base is sleeved inside the second limiting frame, and a second fixing screw is sleeved inside the mold base. The second fixing screw is threaded into the slide. A limiting bolt and an upper mold are fixed at the bottom of the mold base, and the limiting bolt is located on the outside of the upper mold.

[0013] In a further embodiment, a sliding sealing ring is connected between the baffle and the lead screw.

[0014] In a further embodiment, the feeding assembly includes a fixed frame, which is fixed to the feeding side of the stamping assembly. A first motor is fixed to the lower part of the fixed frame, and a rubber roller is fixed to the output shaft end of the first motor. The rubber roller is rotatably connected to the fixed frame. A slider is slidably connected to the upper part of the fixed frame, and a pressure roller is rotatably connected to one side of the slider. One end of an electric telescopic rod is fixed to the top of the slider, and the other end of the electric telescopic rod is on the top of the fixed frame. The slider slides along the fixed frame via the electric telescopic rod.

[0015] In a further embodiment, the winding assembly includes a support base, which is fixed to the discharge side of the stamping assembly. The upper part of the support base has a hollow cavity, and a clamping block is covered on the hollow cavity. A locking post is fixed to one side of the upper part of the support base, and a locking plate is rotatably connected to one side of the clamping block. The lower part of the locking plate has a locking groove, and the locking plate engages with the locking post through the locking groove. A hinge is connected to the other side of the support base and the clamping block, and the clamping block opens and closes the hollow cavity through the hinge. Gear 2 and gear 1 are rotatably connected inside the hollow cavity, and gear 1 meshes with gear 2. One end of gear 1 is connected to a second motor and is driven by the second motor. One end of gear 2 is connected to a winding roller, and the winding roller is supported by the support base.

[0016] In a further embodiment, the tightening assembly includes a limiting rod, which is fixed to the side of the support base away from the stamping assembly. A second limiting block is fixed to the end of the limiting rod away from the support base. A sliding plate is slidably connected to the limiting rod. A second spring is elastically connected between the sliding plate and the second limiting block. A tightening plate is fixed to the side of the sliding plate near the take-up roller.

[0017] In a further embodiment, the bottom mold assembly includes a support platform, a support leg fixed to the bottom of the support platform, a discharge port on one side of the support platform, the stamping assembly being located on the side of the support platform away from the discharge port, and a first limiting frame fixed to the top of the support platform; a lower mold is sleeved inside the first limiting frame, a limiting hole is opened on the top of the lower mold, and a first fixing screw is sleeved inside the lower mold, the first fixing screw being threadedly connected inside the support platform.

[0018] The beneficial effects of this invention are:

[0019] The sheet metal stamping die of this invention stabilizes the stamping pressure on the raw material through a buffer component, conveys the raw material through the feeding component, and winds up the waste material through the winding component and tightens the waste material through the clamping component. This facilitates the passage of raw material and the collection of waste material, while ensuring a stable stamping pressure, thereby improving production efficiency and safety.

[0020] The buffer assembly of this invention utilizes the process of hydraulic oil passing through the protective box. When the hydraulic pump continuously delivers hydraulic oil to the hydraulic cylinder, if the upper mold cannot move down at a uniform speed due to the excessive thickness of the aluminum plate, the hydraulic oil can push the baffle to move, thereby providing space for the hydraulic oil to be released. Therefore, the pressure exerted by the hydraulic oil on the hydraulic cylinder can be effectively distributed, thus ensuring that the upper mold can move down at a uniform speed while maintaining constant pressure.

[0021] The bottom mold assembly and stamping assembly of the present invention utilize the setting of the first limiting frame and the second limiting frame so that when the lower mold and the upper mold need to be replaced, they can be completely removed and replaced by simply unscrewing the first fixing screw and the second fixing screw. Moreover, through this design, the upper mold and the lower mold can be designed or arranged in terms of the shape of the stamped aluminum plate by simply controlling the stamping shape to be within the effective range of the first limiting frame and the second limiting frame.

[0022] The winding assembly of the present invention utilizes a second motor to drive a gear one to rotate, so that the gear one drives a gear two to enable the winding roller to wind up the waste material. After winding is completed, simply rotate the clamping plate to make the clamping block rotate around the hinge as the axis, and then the winding roller can be removed. Then, the gear two can be removed and installed on a new winding roller for continued use.

[0023] The present invention provides a tightening assembly that utilizes the elastic force of a second spring to ensure that the tightening plate can closely adhere to the wound waste material. This prevents large pieces or sharp corners from protruding excessively after stamping during the waste material winding process, thus enabling the winding roller to wind up more waste material, and the wound shape tends to be cylindrical. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of a sheet metal stamping die according to an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of the interior of the base frame in an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the stamping assembly in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the buffer component in an embodiment of the present invention;

[0029] Figure 5This is a schematic diagram of the feeding component in an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the winding assembly in an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram showing the connection between gear one and gear two in an embodiment of the present invention.

[0032] In the diagram: 100, bottom mold assembly; 101, support platform; 102, support leg; 103, discharge port; 104, first limiting frame; 105, lower mold; 106, limiting hole; 107, first fixing screw; 200, stamping assembly; 201, base frame; 202, oil tank; 203, hydraulic pump; 204, oil supply pipe; 205, hydraulic cylinder; 206, slide; 207, second limiting frame; 208, mold base; 209, second fixing screw; 210, limiting bolt; 211, upper mold; 300, buffer assembly; 301, protective box; 302, oil outlet; 303, lead screw; 304, first spring; 305, rotating handle; 306 307. First limiting block; 308. Baffle; 309. First sealing ring; 300. Second sealing ring; 400. Feeding assembly; 401. Fixing frame; 402. First motor; 403. Rubber roller; 404. Slider; 405. Pressure roller; 406. Electric telescopic rod; 500. Rewinding assembly; 501. Support base; 502. Clamping post; 503. Second motor; 504. Gear one; 505. Hinge; 506. Clamping block; 507. Clamping plate; 508. Rewinding roller; 509. Gear two; 600. Tightening assembly; 601. Limiting rod; 602. Second limiting block; 603. Second spring; 604. Slide plate; 605. Tightening plate. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] like Figure 1 As shown, a sheet metal stamping die includes a bottom die assembly 100, a stamping assembly 200 fixed to one side of the bottom die assembly 100, and the bottom die assembly 100 stamps the raw material through the stamping assembly 200. The stamping assembly 200 has a fixed internal component such as... Figure 2 The buffer component 300 shown is described in the reference section. Figure 1As shown, the stamping assembly 200 stabilizes the stamping force on the raw material through the buffer assembly 300. A feeding assembly 400 is fixed on one side of the stamping assembly 200, and a winding assembly 500 is fixed on the other side of the stamping assembly 200. The bottom die assembly 100 conveys the raw material through the feeding assembly 400 and winds up the waste material through the winding assembly 500. A tightening assembly 600 is fixed on the side of the winding assembly 500 away from the stamping assembly 200, and the winding assembly 500 tightens the waste material through the tightening assembly 600.

[0035] Its working principle is as follows: The sheet metal to be stamped is conveyed to the bottom mold assembly 100 through the feeding assembly 400, and the stamping assembly 200 stamps it to form a molded part. During the stamping process, the buffer assembly 300 stabilizes the stamping force on the sheet metal to be stamped, so that the molded part with consistent stamping force can be obtained, thereby improving the quality of the molded part and stamping safety. It also prevents the stamping force from being too large due to changes in the supply pressure during the stamping process, which could damage the workpiece and the forming mold. The scrap is gathered by the winding assembly 500. During the gathering process, the scrap head is tightened by the tightening assembly 600, making the gathering tighter and neater.

[0036] Based on the above working principle, the present invention also proposes some embodiments or implementation structures:

[0037] In some embodiments, such as Figure 2As shown, the buffer assembly 300 includes a protective box 301, which is fixed inside the stamping assembly 200. An oil outlet 302 is provided on the side wall of the protective box 301. The stamping assembly 200 supplies pressurized oil for stamping the sheet metal through the oil outlet 302. A lead screw 303 is rotatably connected to the protective box 301. A handle 305 is fixed to one end of the lead screw 303, and a first limiting block 306 is fixed to the other end. A baffle 307 is slidably connected to the end of the lead screw 303 near the first limiting block 306. The baffle 307 does not rotate with the lead screw 303. The baffle 307 is slidably connected to the inner wall of the protective box 301 and is located on one side of the oil outlet 302. The starting position of the baffle 307 can be adjusted by rotating the lead screw 303, thereby allowing for adjustment of the position when stamping aluminum sheets of different thicknesses. The starting position of 7 can effectively control the pressure transmission to the hydraulic cylinder 205. A first spring 304 is elastically connected between the baffle 307 and the inner wall of the protective box 301 near the handle 305. The first spring 304 pushes the baffle 307 with elastic force, so that the baffle 307 also squeezes the hydraulic oil. In this way, the pressure of the hydraulic oil is released without interrupting the pressure transmission to the hydraulic cylinder 205. From the figure, the first spring 304 can be sleeved on the lead screw 303, but it can also be conceivable that it is not sleeved on the lead screw 303. A first sealing ring 308 is sleeved on one side of the baffle 307, and a second sealing ring 309 is sleeved on the other side of the baffle 307. The first sealing ring 308 and the second sealing ring 309 play a sealing role, thereby preventing hydraulic oil from seeping into the other side of the baffle 307.

[0038] In some embodiments, Figure 1 The middle stamping assembly 200 includes, for example: Figure 2 The base frame 201 shown is fixed to one side of the bottom mold assembly 100, such as to one side of the support platform 101 in the bottom mold assembly 100. An oil tank 202 is fixed inside the base frame 201. The oil tank 202 is connected to a hydraulic pump 203. The oil tank 202 is introduced into the oil tank 202 through the hydraulic pump 203. The protection box 301 distributes pressure oil through the oil tank 202.

[0039] A hydraulic cylinder 205 is fixedly connected to the upper surface of the base frame 201. The oil outlet 302 of the protection box 301 is connected to the hydraulic cylinder 205 and the oil tank 202 respectively through the oil supply pipe 204. The hydraulic cylinder supplies pressurized oil through the oil supply pipe 204. A slide 206 is fixed to the movable end of the hydraulic cylinder 205, and the slide 206 is slidably connected inside the base frame 201. Figure 3 The bottom of the slide 206 shown is fixed with a second limiting frame 207.

[0040] The second limiting frame 207 has a mold base 208 sleeved inside, and the mold base 208 has a second fixing screw 209 sleeved inside. The second fixing screw 209 is threaded into the slide 206. The bottom of the mold base 208 is fixed with reference. Figure 1 The limit pin 210 and the upper die 211 are shown, with the limit pin 210 located on the outside of the upper die 211. This stamping assembly 200 has a simple structure and is easy to connect.

[0041] A sliding sealing ring is connected between the baffle 307 and the lead screw 303. This ensures that the baffle 307 can achieve a seal with the lead screw 303 when sliding, preventing oil from passing through the gap between the two.

[0042] Figure 1 The feeding assembly 400 includes, for example, Figure 5 The mounting bracket 401 shown is fixed to, as in, Figure 1 On the feeding side of the stamping assembly 200 shown, such as one end of the support table 101, a first motor 402 is fixed to the lower part of the fixing frame 401. A rubber roller 403 is fixed to the output shaft end of the first motor 402. The top of the rubber roller 403 is connected to the feed side of the stamping assembly 200. Figure 1 The top of the lower mold 105 is flush with the surface, as shown. Figure 5 The rubber roller 403 is rotatably connected to the fixed frame 401. A slider 404 is slidably connected to the upper part of the fixed frame 401. A pressure roller 405 is rotatably connected to one side of the slider 404. One end of an electric telescopic rod 406 is fixed to the top of the slider 404. The other end of the electric telescopic rod 406 is on the top of the fixed frame 401. The slider 404 slides along the fixed frame 401 via the electric telescopic rod 406.

[0043] Figure 1 The take-up assembly 500 includes, for example, Figure 6 The support base 501 shown is fixed to, as shown in the figure Figure 1 The other side of the stamping assembly 200 shown is connected to the other end of the support platform 101, such as... Figure 6 The support base 501 shown has a hollow cavity on its upper part, and a clamping block 506 is placed on the upper part of the hollow cavity. A locking post 502 is fixed to one side of the upper part of the support base 501, and a clamping block 506 is rotatably connected to one side of the support base 501. Figure 7 The shown card plate 507 has a slot at its lower part, through which it engages with the card post 502. A hinge 505 is connected to the other side of the support base 501 and the clamping block 506, serving as a transition connection. The clamping block 506 opens and closes the hollow cavity via the hinge 505. A rotating connection is located within the hollow cavity, such as... Figure 7 The gear shown is a second gear 509 and a first gear 504. Gear 1 504 meshes with gear 2 509. One end of gear 1 504 is connected to a second motor 503 and is driven by the second motor 503. One end of gear 2 509 is connected to a take-up roller 508. Gear 2 509 can be fixed to the reference position by a set screw. Figure 6 The winding roller 508 shown is supported by a support base 501, making it extremely convenient to assemble and disassemble.

[0044] like Figure 6 The tightening assembly 600 shown includes a limiting rod 601, which is fixed to the side of the support base 501 away from the stamping assembly 200. A second limiting block 602 is fixed to the end of the limiting rod 601 away from the support base 501. A sliding plate 604 is slidably connected to the limiting rod 601. A second spring 603 is elastically connected between the sliding plate 604 and the second limiting block 602. A tightening plate 605 is fixed to the side of the sliding plate 604 near the winding roller 508. The second limiting block 602 provides a support point for the second spring 603. Under the elastic force of the second spring 603, the tightening plate 605 can squeeze the wound waste material, thereby preventing the wound waste material from having relatively prominent bumps or sharp corners.

[0045] like Figure 1 As shown, the bottom mold assembly 100 includes a support platform 101, a support leg 102 fixed at the bottom of the support platform 101, a discharge port 103 on one side of the support platform 101, a stamping assembly 200 disposed on the side of the support platform 101 away from the discharge port 103, and a first limiting frame 104 fixed at the top of the support platform 101. A lower mold 105 is sleeved inside the first limiting frame 104, which restricts the installation range of the lower mold 105. A limiting hole 106 is opened at the top of the lower mold 105, which cooperates with the limiting bolt 210 to ensure that the upper mold 211 and the lower mold 105 do not shift when they are closed. A first fixing screw 107 is sleeved inside the lower mold 105 and is threaded into the support platform 101.

[0046] Specific embodiments of the present invention may be as follows, see below. Figure 1-7As shown, the aluminum sheet, after being unrolled from its coil, passes between the rubber roller 403 and the pressure roller 405. Then, the electric telescopic rod 406 is activated, causing the slider 404 to move downwards, thus pressing the pressure roller 405 onto the aluminum sheet. At this point, the first motor 402 is activated, causing the rubber roller 403 to rotate and transport the aluminum sheet. Through program design, the first motor 402 stops after the rubber roller 403 has transported a certain length of aluminum sheet. Then, the hydraulic pump 203 operates, supplying hydraulic oil from the oil tank 202 through the oil pipe 204 into the hydraulic cylinder 205. This causes the hydraulic cylinder 205 to push the slide 206 downwards, allowing the limit bolt 210 to insert into the limit hole 10. Within 6, the upper die 211 presses onto the aluminum plate and, in conjunction with the lower die 105, stamps the aluminum plate to form the part, causing the formed aluminum plate part to exit from the discharge port 103. During the stamping process, if the upper die 211 cannot move synchronously with the extension of the hydraulic cylinder 205 due to the excessive thickness of the aluminum plate, the upper die 211 will encounter resistance, making it difficult for the hydraulic cylinder 205 to extend. This causes the hydraulic oil to squeeze the baffle 307 within the protection box 301, allowing the hydraulic oil pressure in the oil pipe 204 to be released to a certain extent while slowly increasing, thus ensuring that the hydraulic cylinder 205 can extend slowly. Therefore, the upper die 211 can also stamp slowly. This allows the hydraulic cylinder 205 to obtain a top force less than or equal to the preload of the first spring 304, thus making it more efficient in use. Note: The stamping process is very fast; the slow stamping mentioned here is only relative to the normal stamping speed. Then, the hydraulic pump 203 is reversed, causing the hydraulic oil in the hydraulic cylinder 205 to flow back, or the hydraulic oil flowing into the hydraulic cylinder 205 is reversed through the reversing valve and the pressure relief valve. Under the action of back pressure, the hydraulic cylinder 205 will drive the slide 206 to move upward. At this time, the first motor 402 is started again to feed the material, and a take-up roller 508 with gear 2 509 installed is taken out and placed on the top arc of the support 501. The gear 509 meshes with the gear 504 in the groove, then the clamping block 506 is flipped and the clamping plate 507 is rotated so that the clamping post 502 is inserted into the clamping plate 507, thus preventing the clamping block 506 from flipping. Then the stamped aluminum plate is fixed to the winding roller 508, and the second motor 503 is started so that the gear 504 drives the gear 509 to rotate, thereby making the winding roller 508 wind up the waste material. Therefore, through this repeated work of feeding, stamping and winding, the aluminum plate can be continuously stamped. Moreover, through the design of the buffer component 300, it can also effectively prevent the hydraulic cylinder 205 from extending too fast and causing the upper die 211 to forcefully stamp the aluminum plate.

[0047] It should be noted that the terms "first," "second," etc., used in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein.

[0048] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A sheet metal stamping die, comprising a bottom die assembly, wherein a stamping assembly is fixed to one side of the bottom die assembly, and the bottom die assembly stamps the raw material via the stamping assembly, characterized in that: The stamping assembly has a buffer assembly fixed inside, which stabilizes the stamping pressure on the raw material. A feeding assembly is fixed on one side of the stamping assembly, and a winding assembly is fixed on the other side. The bottom die assembly feeds the raw material through the feeding assembly and winds up the waste material through the winding assembly. A tightening assembly is fixed on the side of the winding assembly away from the stamping assembly, and the winding assembly tightens the waste material through the tightening assembly. The buffer assembly includes a protective box, which is fixed inside the stamping assembly. An oil outlet is provided on the side wall of the protective box. A lead screw is rotatably connected to the protective box. A rotating handle is fixed at one end of the lead screw, and a first limiting block is fixed at the other end of the lead screw. A baffle is slidably connected to the end of the lead screw near the first limiting block. The baffle is slidably connected to the inner wall of the protective box and is located on the side of the oil outlet. A first spring is elastically connected between the baffle and the inner wall of the protective box near the rotating handle. A first sealing ring is sleeved on one side of the baffle.

2. The sheet metal stamping die according to claim 1, characterized in that: The stamping assembly delivers pressurized oil for stamping sheet metal through the oil outlet, and a second sealing ring is fitted onto one side of the baffle.

3. The sheet metal stamping die according to claim 2, characterized in that: The stamping assembly includes a base frame, which is fixed to one side of the bottom mold assembly. An oil tank is fixed inside the base frame, and a hydraulic pump is connected to the oil tank. The hydraulic pump introduces high-pressure oil into the oil tank, and the protection box distributes pressure oil through the oil tank.

4. The sheet metal stamping die according to claim 3, characterized in that: A hydraulic cylinder is fixedly connected to the upper surface of the base frame. The oil outlet of the protection box is connected to the hydraulic cylinder and the oil tank through an oil supply pipe. The hydraulic cylinder supplies pressurized oil through the oil supply pipe. A slide is fixed to the movable end of the hydraulic cylinder. The slide is slidably connected inside the base frame. A second limit frame is fixed to the bottom of the slide.

5. The sheet metal stamping die according to claim 4, characterized in that: The second limiting frame is fitted with a mold base, and the mold base is fitted with a second fixing screw. The second fixing screw is threaded into the slide. The bottom of the mold base is fixed with a limiting bolt and an upper mold, and the limiting bolt is located on the outside of the upper mold.

6. The sheet metal stamping die according to claim 2, characterized in that: A sliding sealing ring is connected between the baffle and the lead screw.

7. The sheet metal stamping die according to claim 1, characterized in that: The feeding assembly includes a fixed frame, which is fixed to the feeding side of the stamping assembly. A first motor is fixed to the lower part of the fixed frame, and a rubber roller is fixed to the output shaft end of the first motor. The rubber roller is rotatably connected to the fixed frame. A slider is slidably connected to the upper part of the fixed frame, and a pressure roller is rotatably connected to one side of the slider. One end of an electric telescopic rod is fixed to the top of the slider, and the other end of the electric telescopic rod is on the top of the fixed frame. The slider slides along the fixed frame via the electric telescopic rod.

8. The sheet metal stamping die according to claim 1, characterized in that: The winding assembly includes a support base, which is fixed to the discharge side of the stamping assembly. The upper part of the support base has a hollow cavity, and a clamping block is covered on the hollow cavity. A locking post is fixed to one side of the upper part of the support base. A locking plate is rotatably connected to one side of the clamping block. The lower part of the locking plate has a locking groove, and the locking plate engages with the locking post through the locking groove. A hinge is connected to the other side of the support base and the clamping block. The clamping block opens and closes the hollow cavity through the hinge. Gear 2 and gear 1 are rotatably connected inside the hollow cavity. Gear 1 and gear 2 are meshed together. One end of gear 1 is connected to a second motor and is driven by the second motor. One end of gear 2 is connected to a winding roller, and the winding roller is supported by the support base.

9. A sheet metal stamping die according to claim 8, characterized in that: The tightening assembly includes a limiting rod, which is fixed on the side of the support base away from the stamping assembly. A second limiting block is fixed to the end of the limiting rod away from the support base. A sliding plate is slidably connected to the limiting rod. A second spring is elastically connected between the sliding plate and the second limiting block. A tightening plate is fixed to the side of the sliding plate near the take-up roller.

10. A sheet metal stamping die according to any one of claims 1-9, characterized in that: The bottom mold assembly includes a support platform, a support leg fixed to the bottom of the support platform, a discharge port on one side of the support platform, a stamping assembly located on the side of the support platform away from the discharge port, and a first limiting frame fixed to the top of the support platform; a lower mold is sleeved inside the first limiting frame, a limiting hole is opened on the top of the lower mold, and a first fixing screw is sleeved inside the lower mold, the first fixing screw being threadedly connected to the inside of the support platform.

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