Angle locking structure for turnover of sheet metal stamping die

Abstract

The invention relates to the field of dies, in particular to an angle locking structure for sheet metal stamping die rollover, and aims to overcome the defect that the angle of an existing stamping die is difficult to lock quickly after rollover. The angle locking structure comprises a T-shaped base and a rollover locking structure, and first supporting plates are welded to the two sides of the top of the T-shaped base; a first steering shaft and a second steering shaft are rotationally arranged on the inner sides of the two first supporting plates correspondingly, a first connecting block and a second connecting block are welded to the outer sides of the first steering shaft and the second steering shaft correspondingly, and a lower die and an upper die are welded to the other sides of the first connecting block and the second connecting block correspondingly. A first large gear and a second large gear are welded to the periphery of the first steering shaft and the periphery of the second steering shaft correspondingly, and the mold turning locking structure is used for turning over the lower mold and the upper mold and locking the mold turning angle of the lower mold and the mold turning angle of the upper mold. The angle can be rapidly locked, the situation of angle deviation in the manual locking process is avoided, and the accuracy of the turnover angle is guaranteed; and mold turning and angle locking do not need manual operation, so that the working efficiency is higher.

Description

Technical Field

[0001] The invention relates to the technical field of moulds, and in particular to an angle locking structure for a sheet metal stamping mould flip. Background Art

[0002] Sheet metal stamping dies are tools used for sheet metal processing, mainly used to process metal sheets (sheet metal) into parts of the desired shape through the stamping process. Stamping dies usually consist of two parts: an upper die and a lower die. The sheet metal material is placed in the die and the press is used to perform stamping, cutting, stretching or bending. Flipping refers to rotating or flipping a part of the die (usually the upper die or the lower die) to another direction.

[0003] When sheet metal stamping dies are turned over to the required angle, they generally use mechanical structures such as positioning pins, keyways and keys to lock the angle. These locking structures require manual operation to lock, which is not only time-consuming and labor-intensive, but also inefficient, and unable to quickly lock the angle, which may cause angle deviation during manual operation and lead to inaccurate turning angles. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that manual operation is required for locking, which is not only time-consuming and labor-intensive, but also has low work efficiency, and the angle cannot be locked quickly, thereby causing angle deviation during manual operation and resulting in inaccurate mold turning angles. An angle locking structure for sheet metal stamping mold turning is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: The angle locking structure of the sheet metal stamping die flipping mold comprises: a T-shaped base, first support plates are vertically welded on both sides of the top of the T-shaped base, and the inner sides of the two first support plates are respectively connected with a first steering shaft and a second steering shaft in horizontal rotation, the outer sides of the first steering shaft and the second steering shaft are respectively welded with a first connecting block and a second connecting block, the other sides of the first connecting block and the second connecting block are respectively welded with a lower mold and an upper mold, and the outer circumferences of the first steering shaft and the second steering shaft are respectively welded with a first large gear and a second large gear; The mold flip locking structure is used to flip the lower mold and the upper mold, and to lock the flip angles of the lower mold and the upper mold.

[0006] As a further technical solution of the present invention, the second steering shaft is sleeved on the outside of the first steering shaft, a spring is welded at the bottom of the lower mold, multiple springs are provided and evenly distributed at the bottom of the lower mold, and the bottoms of multiple springs are welded to the top of the T-shaped base.

[0007] The spring supports the bottom of the lower die so that it is not in a suspended state.

[0008] As a further technical solution of the present invention, the mold-turning locking structure includes a forward and reverse motor, a mounting seat is welded at one corner of the top of the T-shaped base, the forward and reverse motor is horizontally fixedly installed on the top of the mounting seat, a driving shaft is horizontally fixedly installed on the output end of the forward and reverse motor, a second support plate is vertically welded on the top of the T-shaped base, and the first driven shaft and the second driven shaft are horizontally penetrated and rotatably connected at both ends of the second support plate, a first belt and a second belt are respectively connected between the driving shaft and the first driven shaft and the second driven shaft, an inserted shaft is horizontally penetrated inside the first driven shaft, the inserted shaft and the first driven shaft are splined, and a first small disc and a second small disc are respectively welded on the other ends of the second driven shaft, a first large disc and a second large disc are respectively arranged on one side of the first small disc and the second small disc, circular grooves are opened on the inner sides of the first large disc and the second large disc, the first small disc and the second small disc are respectively rotatably connected at the centers of the two circular grooves, and the inner walls of the circular grooves are uniform A plurality of ratchets are welded thereon, and a toggle plate is rotatably connected to the outer edge of the first small disc, and the front end of the toggle plate abuts between two adjacent ratchets. A limit pin and an elastic plate are respectively welded on the outer side and inner side of the toggle plate on the outer side of the first small disc, and the limit pin and the elastic plate abut against the outer side and inner side of the toggle plate respectively. The structure inside the circular groove on the inner side of the second large disc is completely symmetrical with the structure inside the circular groove on the inner side of the first large disc. A rotating shaft is horizontally welded at the center of the outer side of the first large disc, and a Z-shaped block, a first L-shaped plate and a second L-shaped plate are sequentially sleeved on the outer side of the rotating shaft. A small gear is welded on the outer side of the rotating shaft between the first L-shaped plate and the second L-shaped plate, and the small gear can mesh with the first large gear and the second large gear. A lead screw is horizontally welded at the center of the outer side of the second large disc, and a support block is vertically welded on the top of the T-shaped base. The other end of the lead screw is rotatably connected to the side of the support block, and the other end of the Z-shaped block is sleeved on the outer side of the lead screw, and the Z-shaped block and the lead screw are connected by threads.

[0009] When it is necessary to turn the mold, start the forward and reverse motors to drive the driving shaft to rotate counterclockwise, the driving shaft drives the second driven shaft to rotate counterclockwise through the second belt, the second driven shaft drives the second small disc to rotate counterclockwise, the second small disc drives the toggle piece to rotate counterclockwise, because its outer side abuts against the limit pin, the top of the toggle piece will not be displaced when the toggle piece rotates counterclockwise, that is, it will not be separated from the adjacent ratchet teeth, the second small disc drives the second large disc to rotate counterclockwise through the toggle piece, the second large disc drives the lead screw to rotate counterclockwise, and then drives the Z-block to move forward on the lead screw, the Z-block drives the rotating shaft to move forward, and the rotating shaft drives the small gear to move forward until the small gear is meshed with the first large gear or the second large gear; At this time, the forward and reverse motors are started again to drive the active shaft to rotate clockwise, the active shaft drives the first driven shaft to rotate clockwise through the first belt, the first driven shaft drives the plug shaft to rotate clockwise, the first driven shaft drives the first small disc to rotate clockwise, the first small disc drives the toggle piece to rotate clockwise, because its outer side abuts against the limiting pin, the top of the toggle piece will not be displaced when the toggle piece rotates clockwise, that is, it will not be separated from the adjacent ratchet teeth, the first small disc drives the first large disc to rotate clockwise through the toggle piece, the first large disc drives the rotating shaft to rotate clockwise, the rotating shaft drives the first steering shaft or the second steering shaft to rotate counterclockwise through the small gear and the first large gear or the second large gear, the first steering shaft or the second steering shaft drives the lower mold or the upper mold to rotate counterclockwise for mold turning; mold turning and angle locking of the lower mold or the upper mold do not require manual operation, and the work efficiency is higher, and the mold turning and angle locking of the lower mold or the upper mold are completed by only one driving device matching mechanism, and the linkage of the overall structure is stronger.

[0010] When the pinion is not meshed with the first large gear, the first L-shaped plate moves to be engaged between the convex teeth of the first large gear to prevent it from rotating; when the pinion is not meshed with the second large gear, the second L-shaped plate moves to be engaged between the convex teeth of the second large gear to prevent it from rotating; thus, when the lower or upper mold is flipped over, that is, when the pinion moves away and does not continue to flip over, the L-shaped plate immediately grabs the position of the large gear to prevent it from continuing to rotate, thereby quickly locking the angle, avoiding angle deviation during manual angle locking, and ensuring the accuracy of the flipping angle.

[0011] As a further technical solution of the present invention, three limit rings are welded in sequence on the outside of the rotating shaft, and the three limit rings are respectively embedded in the Z-shaped block, the first L-shaped plate and the second L-shaped plate and rotatably connected. A sliding groove is horizontally opened on the top of the T-shaped base, and the bottoms of the first L-shaped plate and the second L-shaped plate are both slidably connected to the inside of the sliding groove.

[0012] The three limiting rings can synchronously drive the Z-shaped block, the first L-shaped plate and the second L-shaped plate to move when the rotating shaft moves, and the rotating shaft can also rotate inside the Z-shaped block, the first L-shaped plate and the second L-shaped plate.

[0013] The beneficial effects of the present invention are: 1. When the lower or upper mold is turned over, that is, when the small gear moves away and does not continue to turn over, the L-shaped plate immediately clamps the position of the large gear to prevent it from continuing to rotate, so that the angle can be quickly locked to avoid angle deviation during manual locking of the angle and maintain the accuracy of the turning angle.

[0014] 2. The mold turning and angle locking of the lower mold or upper mold do not require manual operation, and the work efficiency is higher. The mold turning and angle locking of the lower mold or upper mold are completed by only one driving device and the mechanism, and the linkage of the overall structure is stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the angle locking structure of the sheet metal stamping die flipping die proposed by the present invention; Figure 2 It is a rear view structural schematic diagram of the angle locking structure of the sheet metal stamping die flipping die proposed by the present invention; Figure 3 A side structural schematic diagram of the angle locking structure of the sheet metal stamping die flipping die proposed by the present invention; Figure 4 This is a bottom view structural schematic diagram of the angle locking structure of the sheet metal stamping die flipping die proposed by the present invention; Figure 5 This is a schematic diagram of the state of the non-mold-turning process of the angle locking structure of the mold-turning of the sheet metal stamping die proposed by the present invention; Figure 6 A schematic diagram of the partial structure of the angle locking structure of the sheet metal stamping die flipping die proposed by the present invention; Figure 7 A schematic diagram of the rotating shaft removal state of the angle locking structure of the sheet metal stamping die flipping die proposed by the present invention; Figure 8 This is a partial bottom-up structural schematic diagram of the angle locking structure of the sheet metal stamping die flipping die proposed by the present invention.

[0016] In the figure: 1, lower die; 2, T-shaped base; 3, first large gear; 4, first support plate; 5, first belt; 6, mounting seat; 7, forward and reverse motor; 8, second belt; 9, upper die; 10, second support plate; 11, second driven shaft; 12, Z-shaped block; 13, lead screw; 14, first L-shaped plate; 15, small gear; 16, support block; 17, second L-shaped plate; 18, second large gear; 19, plug shaft; 20, The first driven shaft; 21. the driving shaft; 22. the slide groove; 23. the first large disc; 24. the second large disc; 25. the spring; 26. the rotating shaft; 27. the ratchet; 28. the circular groove; 29. ​​the elastic sheet; 30. the toggle sheet; 31. the limit pin; 32. the second small disc; 33. the limit ring; 34. the first connecting block; 35. the first steering shaft; 36. the second connecting block; 37. the second steering shaft; 38. the first small disc. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0018] Please refer to the attached Figure 1 -Attached Figure 8, the angle locking structure of the sheet metal stamping die flipping mold comprises: a T-shaped base 2, first support plates 4 are vertically welded on both sides of the top of the T-shaped base 2, and the inner sides of the two first support plates 4 are respectively connected with the first steering shaft 35 and the second steering shaft 37 for horizontal rotation, the first steering shaft 35 and the second steering shaft 37 are respectively welded with the first connecting block 34 and the second connecting block 36 on the outer sides, the lower mold 1 and the upper mold 9 are respectively welded on the other sides of the first connecting block 34 and the second connecting block 36, and the first steering shaft 35 and the second steering shaft 37 are respectively welded with the first large gear 3 and the second large gear 18 on the outer periphery; The mold-turning locking structure is used to turn the lower mold 1 and the upper mold 9, and to lock the angles of the lower mold 1 and the upper mold 9.

[0019] The first support plate 4 supports the first steering shaft 35 and the second steering shaft 37 , that is, supports the flipping of the lower mold 1 and the upper mold 9 .

[0020] Please see attached Figure 4 and Figure 8 In a preferred embodiment, the second steering shaft 37 is sleeved on the outside of the first steering shaft 35, a spring 25 is welded at the bottom of the lower mold 1, a plurality of springs 25 are provided and evenly distributed at the bottom of the lower mold 1, and the bottoms of the plurality of springs 25 are welded to the top of the T-shaped base 2.

[0021] The spring 25 supports the bottom of the lower mold 1 so that it is not in a suspended state.

[0022] Please see attached Figure 1-5 In a preferred embodiment, the mold-turning locking structure includes a forward and reverse motor 7, a mounting seat 6 is welded to a corner of the top of the T-shaped base 2, the forward and reverse motor 7 is horizontally fixedly installed on the top of the mounting seat 6, and a driving shaft 21 is horizontally fixedly installed at the output end of the forward and reverse motor 7.

[0023] The mounting seat 6 supports and fixes the forward and reverse motors 7 .

[0024] Please see attached Figure 1-5 In a preferred embodiment, a second support plate 10 is vertically welded to the top of the T-shaped base 2, and the first driven shaft 20 and the second driven shaft 11 are horizontally penetrated and rotatably connected at both ends of the second support plate 10, and the first belt 5 and the second belt 8 are respectively connected between the driving shaft 21 and the first driven shaft 20 and the second driven shaft 11, and an inserted shaft 19 is horizontally penetrated inside the first driven shaft 20, and the inserted shaft 19 and the first driven shaft 20 are splined.

[0025] The second support plate 10 supports and fixes the first driven shaft 20 and the second driven shaft 11 ; the insertion shaft 19 can slide inside the first driven shaft 20 , and the first driven shaft 20 can drive the insertion shaft 19 to rotate.

[0026] Please see attached Figure 1-5 In a preferred embodiment, the other ends of the plug shaft 19 and the second driven shaft 11 are respectively welded with a first small disc 38 and a second small disc 32, and one side of the first small disc 38 and the second small disc 32 is respectively provided with a first large disc 23 and a second large disc 24, and the inner sides of the first large disc 23 and the second large disc 24 are both provided with circular grooves 28.

[0027] Please see attached Figure 6 In a preferred embodiment, the first small disc 38 and the second small disc 32 are respectively rotatably connected to the centers of the two circular grooves 28, and a plurality of ratchet teeth 27 are evenly welded on the inner wall of the circular groove 28. The outer edge of the first small disc 38 is rotatably connected to a paddle piece 30, and the front end of the paddle piece 30 abuts between two adjacent ratchet teeth 27.

[0028] Please see attached Figure 6 In a preferred embodiment, the outer side of the first small disc 38 is located on the outer side and inner side of the toggle piece 30, and a limit pin 31 and an elastic sheet 29 are respectively welded thereon. The limit pin 31 and the elastic sheet 29 are respectively abutted against the outer side and inner side of the toggle piece 30. The structure inside the circular groove 28 on the inner side of the second large disc 24 is completely symmetrical with the structure inside the circular groove 28 on the inner side of the first large disc 23.

[0029] When the driving shaft 21 rotates counterclockwise, the first belt 5 drives the first driven shaft 20 to rotate counterclockwise, the first driven shaft 20 drives the plug shaft 19 to rotate counterclockwise, the first driven shaft 20 drives the first small disc 38 to rotate counterclockwise, and the first small disc 38 drives the toggle piece 30 to rotate counterclockwise. Because the inner side of the toggle piece 30 abuts against the elastic sheet 29, the elastic sheet 29 is squeezed to deform when the toggle piece 30 rotates counterclockwise, so that the top of the toggle piece 30 will be separated from the adjacent ratchet teeth 27, and the first small disc 38 will not drive the first large disc 23 to rotate counterclockwise through the toggle piece 30, so the pinion 15 will not rotate during the position movement; When the driving shaft 21 rotates clockwise, the second driven shaft 11 is driven to rotate clockwise through the second belt 8, and the second driven shaft 11 drives the second small disc 32 to rotate clockwise. The second small disc 32 drives the paddle plate 30 to rotate clockwise. Because the elastic sheet 29 is abutted on the inner side, the paddle plate 30 squeezes the elastic sheet 29 to deform it when it rotates counterclockwise, and the top of the paddle plate 30 will disengage from between the adjacent ratchet teeth 27. The second small disc 32 will not drive the second large disc 24 to rotate clockwise through the paddle plate 30, so the position of the small gear 15 will not change during the mold turning process.

[0030] Please see attached Figure 1-5In a preferred embodiment, a rotating shaft 26 is horizontally welded at the center of the outer side of the first large disk 23, and the Z-shaped block 12, the first L-shaped plate 14 and the second L-shaped plate 17 are sequentially sleeved on the outer side of the rotating shaft 26. A small gear 15 is welded on the outer side of the rotating shaft 26 between the first L-shaped plate 14 and the second L-shaped plate 17, and the small gear 15 can mesh with the first large gear 3 and the second large gear 18.

[0031] Please refer to the attached Figure 1-Figure 5 In a preferred embodiment, a screw rod 13 is horizontally welded at the center of the outer side of the second large disc 24, a support block 16 is vertically welded at the top of the T-shaped base 2, the other end of the screw rod 13 is rotatably connected to the side of the support block 16, the other end of the Z-shaped block 12 is sleeved on the outer side of the screw rod 13, and the Z-shaped block 12 and the screw rod 13 are connected by threads.

[0032] When the pinion 15 needs to move back, the screw rod 13 is manually rotated to rotate clockwise, which can drive the Z-shaped block 12 to move back on the screw rod 13, so that the pinion 15 can be restored to its original position and wait for the next mold turning; When the lower mold 1 or the upper mold 9 needs to be restored to its original position after flipping, the first L-shaped plate 14 or the second L-shaped plate 17 is released, and then the first steering shaft 35 or the second steering shaft 37 is manually rotated to drive the lower mold 1 or the upper mold 9 to rotate to its original position.

[0033] Please refer to the attached Figure 7 In a preferred embodiment, three limit rings 33 are welded in sequence on the outside of the rotating shaft 26, and the three limit rings 33 are respectively embedded in the Z-shaped block 12, the first L-shaped plate 14 and the second L-shaped plate 17 and rotatably connected. A slide groove 22 is horizontally opened on the top of the T-shaped base 2, and the bottoms of the first L-shaped plate 14 and the second L-shaped plate 17 are both slidably connected to the inside of the slide groove 22.

[0034] The three limiting rings 33 enable the rotating shaft 26 to synchronously drive the Z-shaped block 12 , the first L-shaped plate 14 and the second L-shaped plate 17 to move when the rotating shaft 26 moves, and the rotating shaft 26 can also rotate inside the Z-shaped block 12 , the first L-shaped plate 14 and the second L-shaped plate 17 .

[0035] From the above description, it can be seen that the above-mentioned embodiment of the present invention achieves the following technical effects: when it is necessary to turn the mold, the forward and reverse motor 7 is started to drive the driving shaft 21 to rotate counterclockwise, the driving shaft 21 drives the second driven shaft 11 to rotate counterclockwise through the second belt 8, the second driven shaft 11 drives the second small disc 32 to rotate counterclockwise, the second small disc 32 drives the toggle plate 30 to rotate counterclockwise, because its outer side abuts against the limiting pin 31, the top of the toggle plate 30 will not be displaced when the toggle plate 30 rotates counterclockwise, that is, it will not be separated from the adjacent ratchet teeth 27, the second small disc 32 drives the second large disc 24 to rotate counterclockwise through the toggle plate 30, the second large disc 24 drives the screw rod 13 to rotate counterclockwise, and then drives the Z-shaped block 12 to move forward on the screw rod 13, the Z-shaped block 12 drives the rotating shaft 26 to move forward, and the rotating shaft 26 drives the small gear 15 to move forward until the small gear 15 is meshed with the first large gear 3 or the second large gear 18; At this time, the forward and reverse motor 7 is started again to drive the driving shaft 21 to rotate clockwise, the driving shaft 21 drives the first driven shaft 20 to rotate clockwise through the first belt 5, the first driven shaft 20 drives the plug shaft 19 to rotate clockwise, the first driven shaft 20 drives the first small disc 38 to rotate clockwise, the first small disc 38 drives the toggle piece 30 to rotate clockwise, because its outer side abuts against the limit pin 31, when the toggle piece 30 rotates clockwise, its top end will not be displaced, that is, it will not be separated from the adjacent ratchet teeth 27, and the first small disc 38 drives the first large disc 38 through the toggle piece 30. The disk 23 rotates clockwise, the first large disk 23 drives the rotating shaft 26 to rotate clockwise, the rotating shaft 26 drives the first steering shaft 35 or the second steering shaft 37 to rotate counterclockwise through the pinion 15 and the first large gear 3 or the second large gear 18, and the first steering shaft 35 or the second steering shaft 37 drives the lower mold 1 or the upper mold 9 to rotate counterclockwise to turn the mold; the mold turning and angle locking of the lower mold 1 or the upper mold 9 do not require manual operation, and the work efficiency is higher, and the mold turning and angle locking of the lower mold 1 or the upper mold 9 are completed by only one driving device matching mechanism, and the linkage of the overall structure is stronger; When the pinion 15 is not meshed with the first large gear 3, the first L-shaped plate 14 moves to be engaged between the convex teeth of the first large gear 3 to prevent it from rotating; when the pinion 15 is not meshed with the second large gear 18, the second L-shaped plate 17 moves to be engaged between the convex teeth of the second large gear 18 to prevent it from rotating; thus, when the mold turning of the lower mold 1 or the upper mold 9 is completed, that is, when the pinion 15 moves away and does not continue to turn the mold, the L-shaped plate immediately grabs the position of the large gear to prevent it from continuing to rotate, thereby quickly locking the angle, avoiding angle deviation during the process of manually locking the angle, and maintaining the accuracy of the mold turning angle.

[0036] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0037] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The angle locking structure of the sheet metal stamping die is characterized by: include: A T-shaped base (2), wherein first support plates (4) are vertically welded to both sides of the top of the T-shaped base (2), and the inner sides of the two first support plates (4) are respectively connected to a first steering shaft (35) and a second steering shaft (37) for horizontal rotation, and the outer sides of the first steering shaft (35) and the second steering shaft (37) are respectively welded to a first connecting block (34) and a second connecting block (36), and the other sides of the first connecting block (34) and the second connecting block (36) are respectively welded to a lower mold (1) and an upper mold (9), and the outer circumferences of the first steering shaft (35) and the second steering shaft (37) are respectively welded to a first large gear (3) and a second large gear (18); A mold turning locking structure, wherein the mold turning locking structure is used to turn the lower mold (1) and the upper mold (9) and to lock the angles of the lower mold (1) and the upper mold (9).

2. The angle locking structure for the sheet metal stamping die turning mold according to claim 1, characterized in that: The second steering shaft (37) is sleeved on the outside of the first steering shaft (35), a spring (25) is welded to the bottom of the lower mold (1), a plurality of springs (25) are provided and evenly distributed at the bottom of the lower mold (1), and the bottoms of the plurality of springs (25) are welded to the top of the T-shaped base (2).

3. The angle locking structure for the sheet metal stamping die flipping according to claim 1, characterized in that: The mold turning locking structure comprises a forward and reverse motor (7), a mounting seat (6) is welded to a corner of the top of the T-shaped base (2), the forward and reverse motor (7) is horizontally fixedly mounted on the top of the mounting seat (6), and a driving shaft (21) is horizontally fixedly mounted on the output end of the forward and reverse motor (7).

4. The angle locking structure for the sheet metal stamping die flipping according to claim 3 is characterized in that: A second support plate (10) is vertically welded to the top of the T-shaped base (2); a first driven shaft (20) and a second driven shaft (11) are horizontally penetrated and rotatably connected at both ends of the second support plate (10); a first belt (5) and a second belt (8) are respectively connected between the driving shaft (21) and the first driven shaft (20) and the second driven shaft (11); an insertion shaft (19) is horizontally penetrated inside the first driven shaft (20); and the insertion shaft (19) and the first driven shaft (20) are spline-connected.

5. The angle locking structure for the sheet metal stamping die turning mold according to claim 4, characterized in that: A first small disc (38) and a second small disc (32) are welded to the other ends of the insertion shaft (19) and the second driven shaft (11), respectively; a first large disc (23) and a second large disc (24) are respectively provided on one side of the first small disc (38) and the second small disc (32); and a circular groove (28) is provided on the inner side of each of the first large disc (23) and the second large disc (24).

6. The angle locking structure for the sheet metal stamping die turning mold according to claim 5, characterized in that: The first small disc (38) and the second small disc (32) are rotatably connected to the centers of the two circular grooves (28), respectively; a plurality of ratchet teeth (27) are evenly welded to the inner wall of the circular groove (28); a paddle plate (30) is rotatably connected to the outer edge of the first small disc (38); a front end of the paddle plate (30) abuts between two adjacent ratchet teeth (27).

7. The angle locking structure for the sheet metal stamping die flipping according to claim 6, characterized in that: The outer side of the first small disc (38) is located on the outer side and inner side of the toggle plate (30), and a limit pin (31) and an elastic sheet (29) are respectively welded thereto. The limit pin (31) and the elastic sheet (29) are respectively in contact with the outer side and inner side of the toggle plate (30). The structure inside the circular groove (28) inside the second large disc (24) is completely symmetrical with the structure inside the circular groove (28) inside the first large disc (23).

8. The angle locking structure for the sheet metal stamping die turning mold according to claim 7, characterized in that: A rotating shaft (26) is welded horizontally at the center of the outer side of the first large disc (23); a Z-shaped block (12), a first L-shaped plate (14) and a second L-shaped plate (17) are sleeved in sequence on the outer side of the rotating shaft (26); a small gear (15) is welded between the first L-shaped plate (14) and the second L-shaped plate (17) on the outer side of the rotating shaft (26); and the small gear (15) can mesh with the first large gear (3) and the second large gear (18).

9. The angle locking structure for the sheet metal stamping die flipping according to claim 8, characterized in that: A screw rod (13) is horizontally welded at the center of the outer side of the second large disc (24), a support block (16) is vertically welded to the top of the T-shaped base (2), the other end of the screw rod (13) is rotatably connected to the side of the support block (16), the other end of the Z-shaped block (12) is sleeved on the outer side of the screw rod (13), and the Z-shaped block (12) and the screw rod (13) are connected by threads.

10. The angle locking structure for the sheet metal stamping die turning mold according to claim 9, characterized in that: Three limiting rings (33) are welded in sequence on the outside of the rotating shaft (26), and the three limiting rings (33) are respectively embedded in the Z-shaped block (12), the first L-shaped plate (14) and the second L-shaped plate (17) and are rotatably connected. A sliding groove (22) is horizontally opened on the top of the T-shaped base (2), and the bottoms of the first L-shaped plate (14) and the second L-shaped plate (17) are both slidably connected inside the sliding groove (22).

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