Metal punch forming die

Abstract

The invention relates to the technical field of stamping dies, in particular to a metal stamping forming die which comprises a multi-stage stamping head and a bottom die, a penetrating outer forming arm is rotatably arranged in the multi-stage stamping head, the outer forming arm comprises a first rotating part and a second rotating part, and when the first rotating part rotates, the second rotating part synchronously rotates; and an external pressure forming part is arranged on the second rotating part. According to the multi-stage stamping die, the multi-stage stamping head, the outer forming arm, the adjusting piece and the bottom shaping template are designed in a matched mode, in the downward pressing process of the multi-stage stamping head, the multi-stage stamping head and the bottom die form the purpose of pre-clamping a metal plate firstly, and then the outer forming arm bends a metal piece in a horizontal state through the second stroke; the bending part of the metal part and the bottom shaping template form a stamping state, and the metal part can be quickly formed under the action of the adjusting part, so that compared with an existing multi-step forming mode, one-time forming is realized, the efficiency is high, the quality is good, and the processing cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of stamping dies, and particularly relates to a metal stamping and forming die. Background Art

[0002] During the production of high-end seats, in order to highlight the high-end feeling and metallic texture of the chair and improve the quality of the entire chair, in some design styles, an inner package as shown in Figure 13 is used to perform internal wrapping treatment on the seat. In this way, the formed part is directly placed in the formed chair frame and then fixed to form the overall product.

[0003] However, in the formed parts of the applicant currently Figure 13 , multiple sheet metals are welded into a whole, and then the welding seams are finely processed. However, it is not easy to control the heat during welding, the accuracy of the product is low, and the multi-step processing method has low efficiency, especially poor aesthetics. Therefore, on this basis, the applicant designs a die for one-time stamping of metal sheets to improve the quality and processing speed of product processing. Summary of the Invention

[0004] The purpose of the present invention is to provide a metal stamping and forming die to solve the problems in the background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A metal stamping and forming die, characterized in that it includes a multi-stage stamping head and a bottom die. An outer forming arm that penetrates out is rotatably arranged in the multi-stage stamping head. The outer forming arm includes a first rotating part and a second rotating part. When the first rotating part rotates, the second rotating part rotates synchronously. An outer pressure forming component is arranged on the second rotating part;

[0006] It also includes an adjusting part. The adjusting part is arranged at the bottom of the bottom die. The adjusting part includes a rotating adjustment part. A chamfer limiting mechanism is arranged on the rotating adjustment part. One end of the rotating adjustment part is provided with a bottom shaping template;

[0007] Among them, the rotating adjustment part includes a rotating seat. An adjustment space is arranged on the inner wall of the rotating seat. A connecting plate sleeve is elastically arranged in the adjustment space. An adjustment block and an elastic adjustment frame are arranged in the connecting plate sleeve. Central chamfer die cores are arranged at both ends of the elastic adjustment frame. A central chamfer die core is arranged at one end of the connecting plate sleeve. A swing frame is rotatably arranged on the rotating seat. A guiding hook is elastically arranged on the swing frame. The shape of the elastic adjustment frame is in the shape of a "brace". A strip-shaped seat is elastically arranged in the swing frame through a compression spring. A sliding shaft on the swing frame is slidable in the strip-shaped seat. A driving rack is arranged on the sliding shaft;

[0008] The bottom shaping template includes an outer side shaping template. Plastic shaping die plates are arranged on both sides of the outer side shaping template. A side change limiting template that abuts against the edge of the metal sheet is arranged on the outer side of the plastic shaping die plate. A driving gear is arranged inside the plastic shaping die plate, and the driving gear meshes with a driving rack.

[0009] Further, the multi-stage stamping head includes a stamping die sleeve. The stamping die sleeve and the bottom die position the metal sheet. It also includes a flank positioning plate arranged at the arc-shaped plastic part of the bottom die. The stamping die sleeve is sleeved with a first-stage telescopic sleeve. A second-stage telescopic sleeve is elastically arranged inside the first-stage telescopic sleeve. Four abutting pressure plates that penetrate through the displacement openings on the first-stage telescopic sleeve are arranged on the second-stage telescopic sleeve. An annular hinge seat is arranged on the inner wall of the stamping die sleeve.

[0010] Further, the first rotating part includes a rotating sleeve. The rotating sleeve is elastically rotated on the annular hinge seat through a torsion spring. Fixed bevel gears that can rotate a certain angle are arranged on both sides of the rotating sleeve. A swing arm joint one is arranged on the outer side of the rotating sleeve. Driving double bevel gear parts are movably arranged on both sides of the swing arm joint one;

[0011] The second rotating part includes a downward pressing arm sleeve. The downward pressing arm sleeve is hinged to the outer end of the driving double bevel gear part through a rotating shaft, and the rotating shaft is fixed to the downward pressing arm sleeve. A driven bevel gear that meshes with the driving double bevel gear part is arranged at the outer end of the rotating shaft. A swing arm joint two is movably inserted at the bottom end of the downward pressing arm sleeve. A bending rod is arranged on the swing arm joint one, and the rotation center of the bending rod is located outside the center of the rotating shaft. One end of the bending rod is movably connected to the swing arm joint two. When the second rotating part rotates, the bending rod can make the swing arm joint two move in the length direction.

[0012] Further, the external pressure forming component includes a forming arm. A channel is arranged at the end of the contact surface between the forming arm and the metal sheet. A shaping strip is sleeved inside the channel. A supporting bottom plate is elastically arranged at the end of the forming arm. A guiding strip for extruding the shaping strip is arranged inside the supporting bottom plate.

[0013] Further, the adjusting block includes a plate-shaped part sleeved inside the inner cavity of the connecting plate sleeve, and a V-shaped part close to the middle of the side receiving chamfering die core. A guiding block is arranged at the bottom of the adjusting block, and the guiding block exposes a square opening on the connecting plate sleeve.

[0014] Further, an arc-shaped notch is arranged at the position of the bottom die where the outer forming arm is located. The radian when the side receiving chamfering die core and the two center chamfering die cores are spliced is the same as the radian of the arc-shaped notch.

[0015] Further, a shaft rod is fixedly connected to the swing frame. A rotating groove is provided at the position of the shaft rod. The guiding hook is sleeved on the shaft rod. A rotating ring is arranged inside the guiding hook. The rotating ring rotates in the rotating groove through a return spring.

[0016] Further, the elastic adjustment frame includes a V-shaped elastic sheet arranged in the middle. Hook rods are arranged on both sides of the V-shaped elastic sheet. One end of each hook rod is fixedly connected to one side of the side receiving chamfer die core.

[0017] Further, the thickness h of the shaping die plate is less than the thickness H of the side change limiting template.

[0018] Technical effects and advantages of the present invention:

[0019] Through the coordinated design of the multi-stage stamping head, the outer forming arm, the adjusting part and the bottom shaping template, during the downward pressing process of the multi-stage stamping head, first, the purpose of pre-clamping the metal sheet with the bottom die is achieved. Then, through the second stroke, the outer forming arm bends the metal part in a horizontal state, and forms a stamping state between the bent part of the metal part and the bottom shaping template. Under the action of the adjusting part, rapid forming can be achieved. In this way, compared with the existing multi-step forming method, it can be formed at one time, with high efficiency, good quality and reduced processing costs. Description of the drawings

[0020] Figure 1 is a three-dimensional view of the present invention;

[0021] Figure 2 is a schematic diagram of the multi-stage stamping head in the present invention;

[0022] Figure 3 is a bottom view of the bottom die of the present invention;

[0023] Figure 4 is the present invention Figure 3 in the enlarged view;

[0024] Figure 5 is a schematic diagram of the first rotating part in the present invention;

[0025] Figure 6 is a schematic diagram of the flank positioning plate of the present invention;

[0026] Figure 7 is a schematic diagram of the swing arm joint two in the present invention;

[0027] Figure 8 is a state diagram before forming of the present invention;

[0028] Figure 9 is the enlarged view in FIG. B of the present invention;

[0029] Figure 10It is a top view of the state diagram of the present invention before molding;

[0030] Figure 11 A schematic diagram of a driving rack and a driving gear of the present invention;

[0031] Figure 12 is a cross-sectional view of a forming arm in the present invention;

[0032] Figure 13 is a schematic diagram of a molded product of the present invention;

[0033] Figure 14 It is a schematic diagram of the connection part between the rotating sleeve and the fixed bevel gear in the present invention;

[0034] Figure 15 Schematic diagram of the metal sheet of the present invention.

[0035] In the figure:

[0036] 1. Multi-stage punch head; 11. Punching die sleeve; 12. First-stage telescopic sleeve; 13. Second-stage telescopic sleeve; 14. Contact pressure plate; 15. Annular hinge seat; 2. Bottom die; 3. External forming arm; 31. Rotating sleeve; 32. Torsion spring; 33. Fixed bevel gear; 34. Swing arm joint 1; 35. Driving bidirectional bevel gear; 36. Driven bevel gear; 37. Lower pressure arm sleeve; 38. Bending rod; 39. Swing arm joint 2; 310. Forming arm; 3101. Supporting bottom plate; 311. Shaping strip; 312. Guide strip; 4 , adjusting parts; 41, rotating seat; 41A, adjusting space; 42, connecting plate sleeve; 43, adjusting block; 44, elastic adjustment frame; 45, side chamfering mold core; 46, center chamfering mold core; 47, guide hook; 48, compression spring; 49, strip seat; 410, sliding shaft; 411, swing frame; 412, driving rack; 5, bottom shaping template; 51, outer side shaping template; 52, shaping mold plate; 521, driving gear; 53, side variable limit template; 6, side wing positioning plate; 7, molded product. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Reference Figures 1 to 14A metal stamping die shown includes a multi-stage stamping head 1 and a bottom die 2. The multi-stage stamping head 1 includes a stamping die sleeve 11. The stamping die sleeve 11 and the bottom die 2 position the metal sheet. It also includes a flank positioning plate 6 provided at the arc-shaped plastic part of the bottom die 2. The flank positioning plate 6 is elastically arranged through a torsion spring, and there is an inclined surface on the flank positioning plate 6. The leg of the metal sheet is placed on the inclined surface. Two flank positioning plates 6 are provided for each arc-shaped plastic part. By contacting the edge of the leg of the metal sheet through the inclined surface of the flank positioning plate 6, the purpose of pre-positioning is achieved. When pressing down, the flank positioning plates 6 on both sides can move out to avoid the forming path. A first-stage telescopic sleeve 12 is sleeved on the stamping die sleeve 11. A second-stage telescopic sleeve 13 is elastically arranged inside the first-stage telescopic sleeve 12. Four abutting pressure plates 14 passing through the displacement openings on the first-stage telescopic sleeve 12 are arranged on the second-stage telescopic sleeve 13. An annular hinge seat 15 is arranged on the inner wall of the stamping die sleeve 11. The annular hinge seat 15 is formed by integrating four arc-shaped parts and four straight rod parts. The straight rod parts are located at the positions of the displacement openings, providing a rotation condition for the outer forming arm 3.

[0039] An outer forming arm 3 rotatably arranged in the multi-stage stamping head 1 penetrates out. The outer forming arm 3 includes a first rotating part and a second rotating part. When the first rotating part rotates, the second rotating part rotates synchronously. An outer pressure forming component is arranged on the second rotating part;

[0040] Further explanation is that the first rotating part includes a rotating sleeve 31. The rotating sleeve 31 is elastically rotated on the annular hinge seat 15 through a torsion spring 32. Fixed bevel gears 33 that can rotate a certain angle are arranged on both sides of the rotating sleeve 31. A swing arm joint one 34 is arranged on the outer side of the rotating sleeve 31. Driving bidirectional bevel gear parts 35 are movably arranged on both sides of the swing arm joint one 34;

[0041] The second rotating part includes a downward pressing arm sleeve 37. The downward pressing arm sleeve 37 is hinged to the outer end of the driving bidirectional bevel gear part 35 through a rotating shaft, and the rotating shaft is fixed to the downward pressing arm sleeve 37. A driven bevel gear 36 meshing with the driving bidirectional bevel gear part 35 is arranged at the outer end of the rotating shaft. A swing arm joint two 39 is movably inserted at the bottom end of the downward pressing arm sleeve 37. A bending rod 38 is arranged on the swing arm joint one 34, and the rotation center of the bending rod 38 is located outside the rotation center of the rotating shaft. One end of the bending rod 38 is movably connected to the swing arm joint two 39. When the second rotating part rotates, the bending rod 38 can make the swing arm joint two 39 move in the length direction.

[0042] During the use of the first rotating part and the second rotating part, when the multi-stage stamping head 1 moves away from the bottom die 2, the torsion spring 32 causes the rotating sleeve 31 and the fixed bevel gear 33 to synchronously rotate to an upwardly inclined position. At this time, the fixed bevel gear 33 causes the driving double bevel gear part 35 to drive the driven bevel gear 36 to rotate. Furthermore, the second rotating part rotates synchronously with the first rotating part. At this time, when the second part rotates, since the rotation axis of the bending rod 38 is located outside the rotating shaft, when the driven bevel gear 36 causes the downward pressing arm sleeve 37 to rotate, when the downward pressing arm sleeve 37 is in the Figure 8 state, the distance between the swing arm joint two 39 and the swing arm joint one 34 is the largest. When the outer forming arm 3 forms the metal sheet, there is a distance between the end of the outer pressure forming component and the outer edge of the metal sheet. When the contact pressing plate 14 approaches the side of the swing arm joint one 34, when the swing arm joint one 34 is pressed down, it should be noted that the swing arm joint one 34 drives the rotating sleeve 31 to rotate. Since the rotating sleeve 31 is provided with an arc-shaped groove and the fixed bevel gear 33 can rotate in the arc-shaped groove, that is, it rotates from point O to point P. At this time, when the rotating sleeve 31 rotates, the fixed bevel gear 33 first remains stationary. At this time, when the outer pressure forming component presses the metal sheet, the metal sheet gradually bends at the bottom die 2. Since the rotation point of the outer pressure forming component is different when the metal sheet bends downward, during the rotation process, the outer pressure forming component will cross over the edge of the metal sheet, and after squeezing the metal sheet into the bottom shaping template 5, the end of the outer pressure forming component is located outside the bent metal sheet. At this time, the movable rod on the fixed bevel gear 33 moves to the position of point P. When continuing to rotate, the rotating sleeve 31 can drive the fixed bevel gear 33 to rotate synchronously. The fixed bevel gear 33 causes the driven bevel gear 36 to rotate through the driving double bevel gear part 35. In this way, after the downward pressing arm sleeve 37 rotates on the swing arm joint one 34, since there is a distance between the rotation center of the bending rod 38 and the driven bevel gear 36 when the bending rod 38 rotates, and the center of the bending rod 38 is located outside the driven bevel gear 36, one end of the bending rod 38 pulls the swing arm joint two 39 back into the downward pressing arm sleeve 37, and the outer pressure forming component will shorten on the downward pressing arm sleeve 37.

[0043] The outer pressure forming component includes a forming arm 310. A channel is provided at the end of the forming arm 310 in contact with the metal sheet. A shaping strip 311 is sleeved in the channel. The end of the forming arm 310 is elastically provided with a supporting bottom plate 3101. A guiding strip 312 for extruding the shaping strip 311 is provided on the inner side. It should be noted that when the contact supporting bottom plate 3101 on the forming arm 310 contacts the inner arc-shaped convex edge of the outer end of the bottom shaping template 5 (the inner arc-shaped convex edge of the outer end of the bottom shaping template 5 is the bottom bending part of the formed product 7), as Figure 12The distance between the extruded shaping strip 311 and the bottom support plate 3101 is slightly larger than the thickness of the inner arc-shaped raised edge on the bottom shaping template 5 and the thickness of the metal part, so as to ensure that the end of the metal part can be bent during molding. It should be noted that the thickness of the metal sheet is 3-5 mm. In addition, Figure 12 As shown, the outer side of the shaping strip 311 is flush with the surface of the forming arm 310 .

[0044] In the above embodiment, when the external pressure forming component moves on the lower pressure arm sleeve 37, since the external pressure forming component is on the outside of the metal sheet and the metal sheet has been squeezed into the bottom shaping template 5 at this time, in the process of the bending rod 38 retracting the forming arm 310, the bottom support plate 3101 contacts one side of the outer side shaping template 51, so that the bottom support plate 3101 can contact the bottom shaping template 5, and gradually squeeze the bottom shaping template 5 during the rotation process, and then the bottom support plate 3101 will cause the guide bar 312 to move outward during the extrusion, so that the mechanical power can move the shaping bar 311 out of the channel, so that the edge of the metal sheet can be squeezed into a bent state.

[0045] It also includes an adjusting member 4, which is arranged at the bottom of the bottom mold 2. The adjusting member 4 includes a rotating adjusting part, a chamfering limit mechanism is arranged on the rotating adjusting part, and a bottom shaping template 5 is arranged at one end of the rotating adjusting part;

[0046] The rotation adjustment part includes a rotating seat 41, an adjustment space 41A is arranged on the inner wall of the rotating seat 41, a connecting plate sleeve 42 is elastically arranged in the adjustment space 41A, an adjustment block 43 and an elastic adjustment frame 44 are arranged in the connecting plate sleeve 42, both ends of the elastic adjustment frame 44 are provided with a central chamfering core 46, one end of the connecting plate sleeve 42 is provided with a central chamfering core 46, a swing frame 411 is rotatably arranged on the rotating seat 41, a guide hook 47 is elastically arranged on the swing frame 411, the elastic adjustment frame 44 is in the shape of a "bracket", a strip seat 49 is elastically arranged in the swing frame 411 through a compression spring 48, a sliding shaft 410 on the swing frame 411 can slide in the strip seat 49, and a driving rack 412 is arranged on the sliding shaft 410;

[0047] The bottom shaping template 5 includes an outer side shaping template 51, and shaping mold plates 52 are arranged on both sides of the outer side shaping template 51. The outer side of the shaping mold plate 52 is provided with a side variable limit template 53 that contacts the edge of the metal plate. A driving gear 521 is arranged inside the shaping mold plate 52, and the driving gear 521 is meshed with the driving rack 412.

[0048] During the downward pressing process of the forming arm 310, after the end of the forming arm 310 passes over the metal sheet, the metal sheet is brought into contact with the outer side shaping template 51 during the downward pressing process. Due to the narrow upper width of the forming arm 310, the lower end pushes the outer end of the metal sheet into the outer side shaping template 51. The bottom end of the outer side shaping template 51 is provided with an arc-shaped limiting plate. In this way, during the bending forming, the bottom plate 3101 contacts one side of the outer side shaping template 51, so that the guide strip 312 squeezes out the shaping strip 311. After the shaping strip 311 contacts one side of the outer side shaping template 51, the end of the metal sheet can be squeezed into the shaping point of the outer side shaping template 51 by the shaping strip 311, so that the metal sheet can be formed into Figure 13 The middle leg portion is shaped, and there is a height difference between the shaping die plate 52 and the side variable limiting die plate 53, which is used to shape the fan-shaped portion of the metal sheet;

[0049] When the four legs are continuously extruded and formed, since the forming arm 310 is displaced on one side of the swing arm joint 2 39, the bottom support plate 3101 makes the shaping mold plate 52 slide on the swing frame 411, and the outer side shaping template 51 moves upward. By elastically connecting the outer side shaping template 51 to the swing frame 411, the advantage of such a setting is that when 5 is rotated upward to a horizontal downward tilt angle, the outer side shaping template 51 moves outward at this time, which can provide a larger range of contact with the metal part, so that the shaping space is located at the end of the metal plate part, so that the molding space is before molding. , as far as possible located on the outer side of the metal sheet, which can improve the quality of forming. In addition, during the downward rotation, it can move from bottom to top, and the side variable limit template 53 and the shaping mold plate 52 are located on the outer side of the outer side shaping template 51, which can provide a larger shaping space, so that after the forming arm 310 squeezes the metal sheet, it can be located between the side variable limit templates 53 on both sides, which improves the accuracy of positioning and can be bent and formed. During the upward movement, the side chamfering mold core 45 and the side chamfering mold core 45 are first located on the inner side of the inner arc-shaped bent part to help it shape.

[0050] When the outer side shaping template 51 moves upward during rotation, the strip seat 49 moves on the sliding shaft 410 and squeezes the compression spring 48. At this time, the driving rack 412 in the inner cavity of the outer side shaping template 51 drives the driving gear 521 to move during movement. The driving rack 412 fixedly connected to the sliding shaft 410 can drive the driving gear 521 to move, and then can be closed into an integral mold part during rotation, and cooperate with the forming arm 310 to stamp the end of the metal sheet.

[0051] During the above process, the swing frame 411 rotates on the rotating base 41. During the rotation, the guiding hook 47 on the swing frame 411 rotates synchronously. When the guiding hook 47 contacts the connecting plate sleeve 42, at this time, the connecting plate sleeve 42 contacts the side of the bottom die 2 in the adjustment space 41A. Then, when the central chamfering die core 46 enters the shaping position, at the same time, the connecting plate sleeve 42 drives the two side chamfering die cores 45 to synchronously enter the shaping position through the elastic adjustment frame 44. In this way, when the two side chamfering die cores 45 and the central chamfering die core 46 contact, they form a whole. In this way, when the four ends of the metal plate are bent, the side chamfering die core 45 and the central chamfering die core 46 can limit the metal plate from below. It should be noted that the contact surfaces of the side chamfering die core 45 and the central chamfering die core 46 with the metal plate are arc-shaped, so as to ensure that the metal plate has a certain curvature after being bent.

[0052] It should be further explained that the adjusting block 43 includes a plate-shaped part sleeved in the inner cavity of the connecting plate sleeve 42 and a V-shaped part near the middle of the side chamfering die core 45. A guiding block is arranged at the bottom of the adjusting block 43, and the guiding block exposes the square opening on the connecting plate sleeve 42.

[0053] It should be understood that the elastic adjustment frame 44 includes a V-shaped elastic piece arranged in the middle, and hook rods are arranged on both sides of the V-shaped elastic piece. One end of each hook rod is fixedly connected to one side of the side chamfering die core 45.

[0054] When the guiding hook 47 rotates, it first contacts the connecting plate sleeve 42. During the rotation of the guiding hook 47, it first presses the connecting plate sleeve 42 in the adjustment space 41A towards the position of the bottom die 2. In this way, the side chamfering die core 45 and the central chamfering die core 46 approach the bottom die 2 synchronously, and then contact the guiding block. The guiding block moves in the square opening on the connecting plate sleeve 42. Then, the inner wall of the V-shaped part of the adjusting block 43 contacts the outer wall of the V-shaped elastic piece, squeezing the V-shaped elastic piece. At this time, the included angle of the V-shaped elastic piece becomes smaller, so that the two hook rods on both sides are compressed and approach each other. In this way, one side of the side chamfering die core 45 contacts one side of the central chamfering die core 46. In this way, the bent metal plate can be extruded, and a rounded corner state is formed between the face and the leg.

[0055] During the above implementation process, the bottom die 2 is provided with an arc-shaped notch at the position of the outer forming arm 3. The arc formed when the side chamfering die core 45 and the two central chamfering die cores 46 are spliced is the same as the arc of the arc-shaped notch.

[0056] In order to enable the side chamfering die core 45 and the center chamfering die core 46 to close stably, when the guiding hook 47 rotates, when the side chamfering die core 45 and the center chamfering die core 46 move to the forming station, through the elastic rotation setting, it can be ensured that when the swing frame 411 rotates to the limit state, there is a compression margin. Because when the metal part is bent, there will be an extrusion situation at the bending point, which further ensures that there will be no hard extrusion problem when the swing frame 411 rotates. A shaft rod is fixedly connected to the swing frame 411. A rotating groove is provided at the position of the shaft rod. The guiding hook 47 is sleeved on the shaft rod, and a rotating ring is arranged inside the guiding hook 47. The rotating ring rotates in the rotating groove through a return spring.

[0057] As Figure 9 shown, the thickness h of the shaping die plate 52 is less than the thickness H of the side variable limit template 53. The difference between H and h is slightly larger than the thickness of the metal plate. Moreover, it should be noted that the bottom shaping template 5 is formed by bending an arc-shaped plate. And as Figure 8 shown, the shaping die plate 52 and the side variable limit template 53 are fixed in a triangular shape arranged oppositely to each other.

[0058] Through the above design, the metal sheet can be stamped into the state of the formed product 7.

[0059] It should be noted that the metal sheet is Figure 15 shown in the shape, and the horizontal side and the vertical side of the metal sheet are of the same length as the horizontal side and the vertical side of the bottom die 2.

[0060] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A metal stamping die, characterized in that: The invention comprises a multi-stage punch head (1) and a bottom die (2); an external forming arm (3) is rotatably arranged inside the multi-stage punch head (1); the external forming arm (3) comprises a first rotating part and a second rotating part; when the first rotating part rotates, the second rotating part rotates synchronously; and an external pressure forming component is arranged on the second rotating part; It also includes an adjustment member (4), which is arranged at the bottom of the bottom mold (2), and includes a rotation adjustment part, on which a chamfering limit mechanism is arranged, and one end of the rotation adjustment part is provided with a bottom shaping template (5); The rotation adjustment part comprises a rotating seat (41), an adjustment space (41A) is arranged on the inner wall of the rotating seat (41), a connecting plate sleeve (42) is elastically arranged in the adjustment space (41A), an adjustment block (43) and an elastic adjustment frame (44) are arranged in the connecting plate sleeve (42), both ends of the elastic adjustment frame (44) are arranged with a central chamfering mold core (46), one end of the connecting plate sleeve (42) is arranged with a central chamfering mold core (46), A swing frame (411) is rotatably arranged on the rotating seat (41), a guide hook (47) is elastically arranged on the swing frame (411), the elastic adjustment frame (44) is in the shape of a "bracket", a strip seat (49) is elastically arranged in the swing frame (411) through a compression spring (48), a sliding shaft (410) on the swing frame (411) is slidable in the strip seat (49), and a driving rack (412) is arranged on the sliding shaft (410); The bottom shaping template (5) comprises an outer side shaping template (51), and shaping mold plates (52) are arranged on both sides of the outer side shaping template (51), and a side variable limit template (53) that contacts the edge of the metal plate is arranged on the outer side of the shaping mold plate (52), and a driving gear (521) is arranged inside the shaping mold plate (52), and the driving gear (521) is meshed with the driving rack (412).

2. A metal stamping die according to claim 1, characterized in that: The multi-stage punch head (1) comprises a punching die sleeve (11), wherein the punching die sleeve (11) and the bottom die (2) are used to position the metal plate, and further comprises a side wing positioning plate (6) arranged on the arc-shaped plastic part of the bottom die (2); the punching die sleeve (11) is provided with a primary telescopic sleeve (12), a secondary telescopic sleeve (13) is elastically arranged inside the primary telescopic sleeve (12), and four abutting pressure plates (14) are arranged on the secondary telescopic sleeve (13) and penetrate the displacement opening on the primary telescopic sleeve (12); and an annular hinge seat (15) is arranged on the inner wall of the punching die sleeve (11).

3. A metal stamping die according to claim 1, characterized in that: The first rotating part comprises a rotating sleeve (31), the rotating sleeve (31) is elastically rotated on the annular hinge seat (15) through a torsion spring (32), fixed bevel gears (33) that can rotate to a certain angle are arranged on both sides of the rotating sleeve (31), a swing arm joint (34) is arranged on the outer side of the rotating sleeve (31), and driving bidirectional bevel gears (35) are movably arranged on both sides of the swing arm joint (34); The second rotating part comprises a lower pressure arm sleeve (37), the lower pressure arm sleeve (37) is hinged to the outer end of the driving bidirectional bevel gear member (35) through a rotating shaft, and the rotating shaft is fixed to the lower pressure arm sleeve (37), the outer end of the rotating shaft is provided with a driven bevel gear (36) meshing with the driving bidirectional bevel gear member (35), the bottom end of the lower pressure arm sleeve (37) is movably connected with a swing arm joint 2 (39), the swing arm joint 1 (34) is provided with a bending rod (38), and the rotation center of the bending rod (38) is located outside the center of the rotating shaft, one end of the bending rod (38) is movably connected to the swing arm joint 2 (39), and when the second rotating part rotates, the bending rod (38) can make the swing arm joint 2 (39) move in the length direction.

4. A metal stamping die according to claim 2, characterized in that: The external pressure forming component comprises a forming arm (310), a channel is provided at the end of the forming arm (310) in contact with the metal plate, a shaping strip (311) is sleeved in the channel, a supporting plate (3101) is elastically provided at the end of the forming arm (310), and a guide strip (312) for the extruded shaping strip (311) is provided on the inner side of the supporting plate (3101).

5. A metal stamping die according to claim 2, characterized in that: The adjustment block (43) comprises a plate-shaped portion sleeved in the inner cavity of the connecting plate sleeve (42), and a V-shaped portion close to the middle of the side chamfering mold core (45). A guide block is provided at the bottom of the adjustment block (43), and the guide block is exposed from the square opening on the connecting plate sleeve (42).

6. A metal stamping die according to claim 1, characterized in that: The bottom mold (2) is provided with an arc-shaped notch at the position of the outer forming arm (3); and the arc of the side chamfered mold core (45) and the two center chamfered mold cores (46) when spliced ​​together is the same as that of the arc-shaped notch.

7. A metal stamping die according to claim 1, characterized in that: The swing frame (411) is fixedly connected with a shaft rod, a rotation groove is arranged at the shaft rod, the guide hook (47) is sleeved on the shaft rod, and a rotating ring is arranged inside the guide hook (47), and the rotating ring rotates in the rotation groove through a reset spring.

8. A metal stamping die according to claim 1, characterized in that: The elastic adjustment frame (44) comprises a V-shaped spring sheet arranged in the middle, hook rods are arranged on both sides of the V-shaped spring sheet, and one end of the hook rod is fixedly connected to one side of the side chamfering mold core (45).

9. A metal stamping die according to claim 1, characterized in that: The thickness h of the shaping mold plate (52) is less than the thickness H of the side variable limiting template (53).

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