A rotary die changing structure for a punching machine

Abstract

The present invention relates to the technical field of stamping equipment. The present invention discloses a rotary die-changing structure of a stamping machine, which includes a stamping machine, a die cavity is provided at the center of the stamping machine, a die seat is provided inside the die cavity, support beams are provided on both sides of the die seat, the support beams are rotatably connected with a plurality of connecting rods, and a die bracket is provided at the end of the connecting rod, which is characterized in that: a slider structure cooperating with each other is provided on the top of the die bracket, the slider has a traction-linked connecting rod connected to a hydraulic locking block, and the hydraulic locking block locks the stamping die. Compared with the prior art, the advantages of the present invention are that: the present invention can install and set multiple molds for backup, and the mold positioning is accurate after switching. There is no need to disassemble and assemble when switching between spare molds. The die-changing structure of the present invention can complete the replacement of the mold by itself. If the spare mold needs to be disassembled and assembled, the mold installation method can also achieve a faster disassembly and assembly speed. The die-changing structure can perform actions in multiple directions to prevent the mold from bumping.

Description

Technical Field

[0001] The invention relates to the technical field of stamping equipment, and in particular to a rotary die changing structure of a stamping machine. Background Art

[0002] Stamping is a common metal processing method that shapes the metal material in the mold by closing the mold with external force. Conventional stamping machines require the mold to be fixedly installed on the stamping machine bed. When the mold is damaged and needs to be replaced, or when different products need to be produced, it takes a lot of time to replace the mold.

[0003] At present, there are also some stamping machines with mold quick-changing functions, such as a stamping equipment that can automatically replace stamping molds as shown in application number CN202111179213.1, but this type of equipment can only switch between multiple installed molds. When the mold is damaged or needs to be disassembled and replaced due to other circumstances, it still needs to be replaced through traditional mold disassembly and assembly methods, and the improvement in mold disassembly and assembly speed is relatively limited. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the existing die quick-change punching machine has a relatively limited improvement in the speed of die disassembly and assembly, and a rotary die-changing structure of a punching machine is provided.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is: a rotary die changing structure of a stamping machine, which includes a stamping machine, a die cavity is provided at the center of the stamping machine, a die seat is provided inside the die cavity, support beams are provided on both sides of the die seat and are fixedly connected to the inner wall of the die cavity, electric slip rings are provided at the ends of the support beams, a plurality of connecting rods are provided at the rotor end of the electric slip ring, a die bracket is provided at the end of the connecting rod, and the die bracket is connected to the stamping die.

[0006] A first guide rod is provided on the top of the mold bracket, and a second guide rod is provided on the bottom. The first guide rod is slidably connected to the first slider, and the bottom of the first slider is hingedly connected to the first connecting rod. The second guide rod is slidably connected to the second slider, one side of the second slider is hingedly connected to the second connecting rod, and the other side is hingedly connected to the third connecting rod. The end of the first connecting rod is hingedly connected to the middle of the third connecting rod, and the ends of the second connecting rod and the third connecting rod are jointly connected to a hydraulic locking block for connecting the stamping die, one side of the hydraulic locking block is hingedly connected to the second connecting rod, and the other side is hingedly connected to the third connecting rod.

[0007] Furthermore, the first connecting rod is provided with a first limit block at one end close to the third connecting rod, the third connecting rod is provided with a second limit block matching the first limit block, and the first limit block and the second limit block are provided with inclined surfaces matching each other.

[0008] Furthermore, the first sliding block is fixedly provided with a first electric cylinder, the end of the first guide rod is provided with a first limiting plate, and the free end of the first electric cylinder is fixedly connected to the first limiting plate.

[0009] Furthermore, a second electric cylinder is provided at the center of the mold support, an extension rod is extended to both sides from the free end of the second electric cylinder, a connecting arm is hingedly connected to the end of the extension rod, an extension arm is provided on the back of the second slider, and the end of the connecting arm is hingedly connected to the end of the extension arm.

[0010] Furthermore, a U-shaped groove is provided inside the hydraulic locking block, steel ball holes are provided on the upper and lower sides of the U-shaped groove, steel balls are provided in the steel ball holes, a sloped top block is slidably connected to the side of the steel ball hole, and a micro hydraulic cylinder is provided on the back of the sloped top block.

[0011] Furthermore, a mounting block extending outward is provided at the bottom of the static die of the stamping die, rollers are rotatably connected on both sides of the mounting block, and the U-shaped groove profile is arranged to match the rollers.

[0012] Furthermore, a plurality of zero-point positioning chucks are provided on the top of the die seat, and a plurality of positioning pins cooperating with the zero-point positioning chucks are provided on the bottom of the static die of the stamping die.

[0013] Furthermore, the surface of the connecting rod facing the punching machine is provided with a first annular groove, a first gear ring is provided inside the first annular groove, a first annular cover plate is rotatably connected to the opening of the first annular groove, and the first annular cover plate is fixedly connected to the inner wall of the mold cavity.

[0014] Furthermore, a rotating motor is provided inside the punching machine, an output end of the rotating motor extends through the first annular cover plate to the inside of the first annular groove and is provided with a first gear, and the first gear ring is meshed with the first gear.

[0015] The advantages of the present invention compared with the prior art are:

[0016] The present invention can install multiple molds for backup, and there is no need to disassemble or assemble the backup molds when switching between them. The mold changing structure of the present invention can automatically complete the replacement of the molds.

[0017] The mold changing structure of the present invention installs the mold through connecting rod traction and hydraulic locking mechanism. If the spare mold needs to be disassembled, this mold installation method can also achieve a faster disassembly and assembly speed.

[0018] When switching between spare molds, the mold changing structure of the present invention can cooperate with a common mold positioning system to achieve accurate mold positioning and installation, thereby ensuring stamping accuracy.

[0019] The mold changing structure of the present invention can perform actions in multiple directions. In addition to being able to disassemble and assemble the mold, it can also avoid other structures in the device during the mold switching process to prevent the mold from being bumped. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 It is a schematic diagram of the structure in the mold cavity of the present invention.

[0022] Figure 3 It is a schematic diagram of the mold changing structure of the present invention.

[0023] Figure 4 It is a structural schematic diagram of the top of the mold base of the present invention.

[0024] Figure 5 It is a structural schematic diagram of the rotating electrical machine of the present invention.

[0025] Figure 6 It is a structural schematic diagram of the transmission shaft of the present invention.

[0026] Figure 7 It is a structural schematic diagram of the mold support of the present invention.

[0027] Figure 8 It is a structural schematic diagram of the connecting arm of the present invention.

[0028] Fig. 9 It is a schematic diagram of the cross-sectional structure of the hydraulic locking block of the present invention.

[0029] Fig.10 It is a structural schematic diagram of the mounting block and the roller of the present invention.

[0030] Fig.11 It is a schematic diagram of the hydraulic locking block of the present invention being locked with the stamping die.

[0031] Fig.12 It is a schematic diagram of the first step of installing the stamping die of the present invention.

[0032] Fig.13 It is a schematic diagram of the second step of installing the stamping die of the present invention.

[0033] Fig.14 It is a schematic diagram of the third step of installing the stamping die of the present invention.

[0034] Fig.15 It is a schematic diagram of the first step of switching the stamping die of the present invention.

[0035] Fig.16 It is a schematic diagram of the second step of the stamping die switching of the present invention.

[0036] As shown in the figure: 1. stamping machine, 2. mold cavity, 3. mold bracket, 4. stamping mold, 5. mold seat, 6. support beam, 7. electric slip ring, 8. connecting rod, 9. positioning pin, 10. zero point positioning chuck, 11. first annular groove, 12. first gear ring, 13. first annular cover plate, 14. first gear, 15. rotating motor, 16. first guide rod, 17. first slider, 18. first electric cylinder, 19. first limit plate, 20. first connecting rod, 21. second guide rod, 22. second slider, 23. first Second limit plate, 24, second connecting rod, 25, third connecting rod, 26, first limit block, 27, second limit block, 28, hydraulic locking block, 29, electric hydraulic pump, 30, second electric cylinder, 31, extension rod, 32, connecting arm, 33, extension arm, 34, steel ball hole, 35, steel ball, 36, U-shaped groove, 37, inclined top block, 38, micro hydraulic cylinder, 39, mounting block, 40, roller, 41, second annular groove, 42, second gear ring, 43, transmission shaft, 44, second gear, 45, second annular cover plate. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0038] Combined with Figure 1 , Attachment Figure 2 and attached Figure 3 A rotary die-changing structure of a stamping machine comprises a stamping machine 1, a die cavity 2 is arranged at the center of the stamping machine 1, a die seat 5 is arranged inside the die cavity 2, support beams 6 are arranged on both sides of the die seat 5 and are fixedly connected to the inner wall of the die cavity 2, an electric slip ring 7 is arranged at the end of the support beam 6, a plurality of connecting rods 8 are arranged at the rotor end of the electric slip ring 7, a die bracket 3 is arranged at the end of the connecting rod 8, a stamping die 4 is connected to the die bracket 3, and the bottom of the stamping machine 1 is overhead, and the overhead height should ensure that a lifting forklift or other common die transfer machinery can freely enter the bottom of the stamping machine 1.

[0039] Combined with Figure 7 and attached Figure 8A first guide rod 16 is provided on the top of the mold support 3, and a second guide rod 21 is provided on the bottom. The first guide rod 16 is slidably connected to a first slider 17, and a first connecting rod 20 is hingedly connected to the bottom of the first slider 17. The second guide rod 21 is slidably connected to a second slider 22. A second connecting rod 24 is hingedly connected to one side of the second slider 22, and a third connecting rod 25 is hingedly connected to the other side. The end of the first connecting rod 20 is hingedly connected to the middle of the third connecting rod 25. The ends of the second connecting rod 24 and the third connecting rod 25 are commonly connected to a hydraulic locking block 28 for connecting the stamping mold 4. One side of the hydraulic locking block 28 is hingedly connected to the second connecting rod 24, and the other side is hingedly connected to the third connecting rod 25. The mold support 3 is provided with a first electric cylinder 18 for driving the first slider 17 to move, and a second electric cylinder 30 for driving the second slider 22. A traction linkage mechanism for transmitting power is also provided between the second slider 22 and the second electric cylinder 30.

[0040] The first guide rod 16 and the second guide rod 21 are arranged in the same direction and both extend toward the mold base 5 .

[0041] Through the above structure, the sliding displacement of the first slider 17 and the second slider 22 can cause the end of the first connecting rod 20 and the third connecting rod 25 to pull each other, so that the hydraulic locking block 28 moves. In addition, the second connecting rod 24 and the third connecting rod 25 form a parallelogram structure, so that the direction of the hydraulic locking block 28 will not change during the displacement process.

[0042] Combined with Figure 7 and attached Figure 8 The first sliding block 17 is fixedly provided with a first electric cylinder 18 , the end of the first guide rod 16 is provided with a first limiting plate 19 , and the free end of the first electric cylinder 18 is fixedly connected to the first limiting plate 19 .

[0043] A second electric cylinder 30 is provided at the center of the mold bracket 3, and an extension rod 31 is extended to both sides from the free end of the second electric cylinder 30. A connecting arm 32 is hingedly connected at the end of the extension rod 31. An extension arm 33 is provided on the back of the second slider 22. The end of the connecting arm 32 is hingedly connected to the end of the extension arm 33. A second limiting plate 23 is provided at the end of the second guide rod 21.

[0044] The above-mentioned first connecting rod 20 is provided with a first limit block 26, and the third connecting rod 25 is provided with a second limit block 27. The first limit block 26 and the second limit block 27 are arranged in cooperation with each other. When the first electric cylinder 18 extends to the limit and the second electric cylinder 30 retracts to the limit, the first limit block 26 and the second limit block 27 limit and fit each other, ensuring that during the sliding displacement of the first slider 17 and the second slider 22, the swing angles of the first connecting rod 20 and the third connecting rod 25 are limited.

[0045] The hydraulic locking block 28 has two moving directions:

[0046] Reference Fig.12 and attached Fig.13 .

[0047] When the second electric cylinder 30 retracts to its limit and the first electric cylinder 18 extends to its limit, the second electric cylinder 30 extends at a slower speed while the first electric cylinder 18 retracts at a faster speed. At this time, the hydraulic locking block 28 can be translated in the horizontal direction toward the stamping die 4. Through this action, the hydraulic locking block 28 can be connected to the stamping die 4. If the connection needs to be released, the first electric cylinder 18 and the second electric cylinder 30 can work in reverse.

[0048] Reference Fig.13 , Attachment Fig.14 , Attachment Fig.15 and attached Fig.16 .

[0049] When the hydraulic locking block 28 is connected to the stamping die 4, the second electric cylinder 30 extends outward while the first electric cylinder 18 retracts inward. At this time, the hydraulic locking block 28 and the stamping die 4 move vertically downward as a whole. When the mold is switched in the present invention, this action can keep the stamping die 4 away from the die seat 5 to prevent collision. When the stamping die 4 needs to be fixed on the top of the die seat 5, the first electric cylinder 18 and the second electric cylinder 30 can work in reverse.

[0050] Combined with Fig.10 A mounting block 39 extending outward is provided at the bottom of the static die of the stamping die 4, and rollers 40 are rotatably connected on both sides of the mounting block 39.

[0051] Combined with Fig. 9 , Attachment Fig.10 and attached Fig.11 The hydraulic locking block 28 is provided with a U-shaped groove 36 for matching the roller 40. The U-shaped groove 36 is provided with steel ball holes 34 on the upper and lower sides. A steel ball 35 is provided in the steel ball hole 34. The bottom opening of the steel ball hole 34 is retracted to limit the steel ball 35. A sloped top block 37 is slidably connected to the side of the steel ball hole 34. A micro hydraulic cylinder 38 is provided on the back of the sloped top block 37. An electric hydraulic pump 29 for providing hydraulic oil is fixedly installed on the back side of the mold bracket 3.

[0052] For the hydraulic locking block 28 , the electric hydraulic pump 29 provides hydraulic oil to make the micro hydraulic cylinder 38 extend outward to push out the inclined top block 37 . The inclined top block 37 pushes and squeezes the steel ball 35 to move toward the central axis of the U-shaped groove 36 to the limit position. This state serves as the locking state of the hydraulic locking block 28 .

[0053] When the electric hydraulic pump 29 provides hydraulic oil to retract the micro hydraulic cylinder 38 , the state in which the steel ball 35 moves freely in the steel ball hole 34 is regarded as the unlocked state of the hydraulic locking block 28 .

[0054] Combined with Fig. 9 , Attachment Fig.10 and attached Fig.11 In the above structure, when the roller 40 slides into the U-shaped groove 36 and the hydraulic locking block 28 is in the locked state, the stamping die 4 can still swing to a certain extent through the rotational connection between the mounting block 39 and the roller 40. This structure allows the first electric cylinder 18 and the second electric cylinder 30 to telescopically adjust the position of the hydraulic locking block 28, and can provide a certain angle adjustment capability when connecting the hydraulic locking block 28 to the stamping die 4, which is convenient for disassembly and assembly.

[0055] Combined with Figure 4 A plurality of zero-point positioning chucks 10 are provided on the top of the die seat 5, and a plurality of positioning pins 9 cooperating with the zero-point positioning chucks 10 are provided on the bottom of the static die of the stamping die 4. The limit locking of the stamping die 4 is achieved through this structure. The zero-point positioning chuck 10 cooperates with the positioning pins 9 to achieve higher repeatability positioning accuracy, and in the process of inserting the positioning pins 9 into the zero-point positioning chuck 10, the two can still be accurately positioned even if there is a certain degree of deflection, thereby ensuring the stamping accuracy.

[0056] Combined with Figure 5 A first annular groove 11 is provided on the surface of the connecting rod 8 facing the punching machine 1, a first gear ring 12 is provided inside the first annular groove 11, a first annular cover plate 13 is rotatably connected to the opening of the first annular groove 11, the first annular cover plate 13 is fixedly connected to the inner wall of the mold cavity 2, a rotating motor 15 is provided inside the punching machine 1, an output end of the rotating motor 15 passes through the first annular cover plate 13 and extends to the inside of the first annular groove 11 and is provided with a first gear 14, and the first gear ring 12 is meshed with the first gear 14.

[0057] Combined with Figure 6 A second annular groove 41 is provided on the side of the connecting rod 8 facing the mold base 5, a second gear ring 42 is provided in the second annular groove 41, and a second annular cover plate 45 is rotatably connected to the opening of the second annular groove 41. In addition, a transmission shaft 43 is provided on both sides of the mold base 5, and the end of the transmission shaft 43 passes through the second annular cover plate 45 and extends into the second annular groove 41 and is provided with a second gear 44, which is meshed with the second gear ring 42.

[0058] Since connecting rods 8 are provided at both ends of the mold base 5 of the present invention, these connecting rods 8 need to rotate synchronously. Limited by the layout of the present invention, the power required for rotation can only be input from one side of the device. Through the above structure, the rotational power can be transmitted to the connecting rod 8 on the side without power input and drive it to rotate.

[0059] When the mold needs to be installed in the mold changing structure of the present invention, the specific implementation method is as follows:

[0060] The stamping die 4 to be installed is loaded on a lifting forklift or other transporting machinery and driven to the position directly below the overhead part of the stamping machine 1. The rotating motor 15 is controlled to rotate the die support 3 without the stamping die 4 to the position directly below the die seat 5. The first electric cylinder 18 and the second electric cylinder 30 are respectively adjusted and controlled to move the hydraulic locking block 28 to the outside of the roller 40, and the U-shaped groove 36 and the roller 40 are at the same height. At this time, the die changing structure is as shown in the attached figure. Fig.12 shown.

[0061] The electric hydraulic pump 29 is controlled to put the hydraulic lock block 28 in the unlocked state, and the first electric cylinder 18 and the second electric cylinder 30 are controlled to move the hydraulic lock block 28 to insert the roller 40 into the U-shaped groove 36. At this time, the electric hydraulic pump 29 is controlled again to put the hydraulic lock block 28 in the locked state. In this state, the mold changing structure is as shown in the attached figure. Fig.13 shown.

[0062] In order to ensure that the positioning pin 9 of the stamping die 4 does not collide with the die seat 5 during the rotation of the die support 3, the first electric cylinder 18 and the second electric cylinder 30 are controlled to make the hydraulic lock block 28 move radially outward along the rotation axis of the die support 3. At this time, the die changing structure is as shown in the attached figure. Fig.14 shown.

[0063] When it is necessary to switch the mold required for the stamping work of the present invention, the specific implementation method is as follows:

[0064] The punching mechanism of the punching machine 1 is stopped, and the rotating motor 15 is controlled to rotate the punching die 4 to be switched to a position just above the die holder 5. At this time, the die changing structure is as shown in the attached figure. Fig.15 shown.

[0065] The first electric cylinder 18 and the second electric cylinder 30 are controlled to move the hydraulic lock block 28 vertically downward. During this process, the positioning pin 9 is inserted into the zero-point positioning chuck 10 and positioned. At this time, the bottom surface of the static die of the stamping die 4 contacts the top surface of the die seat 5. The first electric cylinder 18 and the second electric cylinder 30 release the power output and provide support force to the stamping die 4 through the die seat 5. At this time, the die changing structure is as shown in the attached figure. Fig.16 As shown and considered, the mold switching is completed, and the punching mechanism of the punching machine 1 continues to work.

[0066] The present invention and its implementation methods are described above, and such description is not restrictive, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by it, and does not deviate from the purpose of the invention, and does not creatively design a structure and implementation method similar to the technical solution, they should all fall within the protection scope of the present invention.

Claims

1. A rotary die-changing structure for a punching machine, comprising a punching machine (1), wherein a die cavity (2) is provided at the center of the punching machine (1), a die seat (5) is provided inside the die cavity (2), support beams (6) are provided on both sides of the die seat (5) and are fixedly connected to the inner wall of the die cavity (2), an electric slip ring (7) is provided at the end of the support beam (6), a plurality of connecting rods (8) are provided at the rotor end of the electric slip ring (7), a die support (3) is provided at the end of the connecting rod (8), and the die support (3) is connected to a punching die (4), characterized in that: The mold support (3) has a first guide rod (16) at the top and a second guide rod (21) at the bottom. The first guide rod (16) is slidably connected to a first slider (17). The first slider (17) is hingedly connected to a first connecting rod (20). The second guide rod (21) is slidably connected to a second slider (22). The second slider (22) is hingedly connected to a second connecting rod (24) on one side and hingedly connected to a third connecting rod (25) on the other side. The end of the first connecting rod (20) is hingedly connected to the middle of the third connecting rod (25). The ends of the second connecting rod (24) and the third connecting rod (25) are jointly connected to a hydraulic locking block (28) for connecting to the stamping mold (4). The hydraulic locking block (28) is hingedly connected to the second connecting rod (24) on one side and hingedly connected to the third connecting rod (25) on the other side. The first sliding block (17) is fixedly provided with a first electric cylinder (18); a first limit plate (19) is provided at the end of the first guide rod (16); and a free end of the first electric cylinder (18) is fixedly connected to the first limit plate (19); A second electric cylinder (30) is provided at the center of the mold support (3), and an extension rod (31) is provided at both sides of the free end of the second electric cylinder (30), and a connecting arm (32) is hingedly connected to the end of the extension rod (31). An extension arm (33) is provided at the back of the second sliding block (22), and the end of the connecting arm (32) is hingedly connected to the end of the extension arm (33).

2. The rotary die-changing structure of a punching machine according to claim 1, characterized in that: A first limit block (26) is provided at one end of the first connecting rod (20) close to the third connecting rod (25), and the third connecting rod (25) is provided with a second limit block (27) cooperating with the first limit block (26). The first limit block (26) and the second limit block (27) are provided with inclined surfaces cooperating with each other.

3. The rotary die-changing structure of a punching machine according to claim 1, characterized in that: The hydraulic locking block (28) is provided with a U-shaped groove (36) inside, and steel ball holes (34) are provided on both upper and lower sides of the U-shaped groove (36). A steel ball (35) is provided in the steel ball hole (34). A sloped top block (37) is slidably connected to the side of the steel ball hole (34), and a micro hydraulic cylinder (38) is provided on the back of the sloped top block (37).

4. The rotary die-changing structure of a punching machine according to claim 3, characterized in that: A mounting block (39) extending outward is provided at the bottom of the static die of the stamping die (4), rollers (40) are rotatably connected on both sides of the mounting block (39), and the contour of the U-shaped groove (36) is arranged to match the rollers (40).

5. The rotary die-changing structure of a punching machine according to claim 1, characterized in that: A plurality of zero-point positioning chucks (10) are provided on the top of the die seat (5), and a plurality of positioning pins (9) matching the zero-point positioning chucks (10) are provided on the bottom of the static die of the stamping die (4).

6. The rotary die-changing structure of a punching machine according to claim 1, characterized in that: A first annular groove (11) is provided on the surface of the connecting rod (8) facing the punching machine (1), a first gear ring (12) is provided inside the first annular groove (11), a first annular cover plate (13) is rotatably connected to the opening of the first annular groove (11), and the first annular cover plate (13) is fixedly connected to the inner wall of the mold cavity (2).

7. The rotary die-changing structure of a punching machine according to claim 6, characterized in that: A rotating motor (15) is provided inside the punching machine (1), the output end of the rotating motor (15) passes through the first annular cover plate (13) and extends into the first annular groove (11) and is provided with a first gear (14), and the first gear ring (12) is meshed with the first gear (14).

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