Cam type stamping mechanism and stamping die

Abstract

The utility model discloses a cam type stamping mechanism and a stamping die. The cam type stamping mechanism comprises a support, a transmission shaft, a driving gear, a cam, a driving structure and a stamping rod. An accommodating space is arranged in the bracket; the transmission shaft is arranged in the accommodating space; the driving gear is arranged on the transmission shaft; the driving structure is arranged in the accommodating space, the cam is arranged on the transmission shaft, and the periphery of the cam extends outwards to form a convex part; the driving structure comprises a first elastic piece and a work doing clamping hook, one end of the first elastic piece elastically abuts against the inner wall face of the containing space, the work doing clamping hook elastically makes contact with the other end of the first elastic piece, and the work doing clamping hook is provided with a first hook part; the punching rod is arranged on the front side of the cam and provided with a punch. The stamping die comprises a lower die, an upper die and the cam type stamping mechanism. The lower die is provided with a stamping opening; the upper die is arranged above the lower die in a manner of moving up and down; and the cam type stamping mechanism is arranged on the lower die.

Description

Technical Field

[0001] The utility model relates to the technology of mold field, in particular to a cam type stamping mechanism and a stamping mold. Background Art

[0002] Molds are the various molds and tools used in industrial production to produce desired products through methods such as injection molding, blow molding, extrusion, die casting, forging, smelting, and stamping. Simply put, a mold is a tool used to create a shaped object. These tools are composed of various parts, and different molds have different components. They primarily achieve the desired shape by changing the physical state of the material being molded. Known as the "mother of industry," they are tools that, under the action of external forces, transform a blank into a part with a specific shape and size. They are widely used in blanking, die forging, cold heading, extrusion, powder metallurgy pressing, pressure casting, and compression or injection molding of products such as engineering plastics, rubber, and ceramics. Molds have a specific contour or internal cavity shape. A contour with a cutting edge allows the blank to be separated (punched) along the contour. The internal cavity shape allows the blank to acquire a desired three-dimensional shape. Molds generally consist of a movable die and a fixed die (or a punch and a die), which can be separated and joined. Separation allows the part to be removed, and closing allows the blank to be injected into the mold cavity for formation. The mold is a precision tool with a complex shape. It bears the expansion force of the blank and has high requirements for structural strength, rigidity, surface hardness, surface roughness and processing accuracy. The development level of mold production is one of the important indicators of the level of mechanical manufacturing.

[0003] Most existing stamping dies use a pneumatic cylinder to drive the punch downward for stamping. Although this structure can achieve the purpose of stamping, when stamping products with more complex structures, when multiple actions need to be performed simultaneously or asynchronously, the cylinder module requires not only additional cylinders but also additional solenoid valves. Each production run requires professional personnel to debug the solenoid valve timing, which is very time-consuming. Furthermore, when there are more cylinders, the number of air pipes also increases, making the arrangement more messy and cumbersome, and prone to errors. During continuous stamping, the air pipes are close to the die, which is prone to accidents. Therefore, it is necessary to propose a new solution for improvement. Utility Model Content

[0004] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide a cam-type stamping mechanism and a stamping die, which can effectively solve the problem that after the existing stamping die adds cylinders and solenoid valves, it takes a lot of time to debug the solenoid valves, and as the number of cylinders increases, the number of air pipes also increases, which makes accidents prone to occur during continuous stamping.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] The cam-type stamping mechanism comprises a bracket, a transmission shaft, a driving gear, a cam, a driving structure and a stamping rod; a accommodating space is provided in the bracket; the transmission shaft is arranged in the accommodating space; the driving gear is arranged on the transmission shaft and drives the transmission shaft to rotate; the driving structure is arranged in the accommodating space and controls the rotation or stationary of the driving gear, the cam is arranged on the transmission shaft and rotates with the rotation of the transmission shaft, and a convex portion extends outward from the periphery of the cam; the driving structure comprises a first elastic member and a working hook, one end of the first elastic member elastically contacts the inner wall surface of the accommodating space, and the working hook can be moved forward and backward to elastically contact the other end of the first elastic member, and the working hook has a first hook portion, which is adapted to the tooth groove of the driving gear; the stamping rod is arranged at the front side of the cam, and the stamping rod has a punch that can move up and down; when the cam rotates, the cam controls the punch to move up and down through the convex portion.

[0007] As a preferred solution, it further includes a back-recoil structure, which includes two bearings, a shaft, a back-recoil hook, an interference member and a second elastic member. The two bearings are respectively axially connected to the two inner wall surfaces of the accommodating space, and the two ends of the shaft are respectively arranged at the edges of the two bearings. The back-recoil hook is arranged on the shaft, and the back-recoil hook has a second hook portion, which is adapted to the tooth groove of the driving gear. The interference member is arranged in the accommodating space, and one end of the interference member contacts the back-recoil hook. The second elastic member is arranged in the accommodating space, and one end of the second elastic member elastically conflicts with the outside, and the other end of the second elastic member elastically contacts the other end of the interference member.

[0008] As a preferred solution, it further includes a deceleration structure, which includes a deceleration gear, a deceleration hook and a third elastic member. The deceleration gear is arranged on the transmission shaft and rotates with the rotation of the transmission shaft. The deceleration hook is arranged in the accommodating space. The deceleration hook has a third hook portion, which is adapted to the tooth groove of the deceleration gear. The third elastic member is arranged in the accommodating space, one end of the third elastic member elastically contacts the outside, and the other end of the third elastic member elastically contacts the third hook portion.

[0009] As a preferred solution, the punching rod includes a rod body and a fourth elastic member, a slot is provided on the rod body, the slot has a guide surface, the upper end of the punch has a guide slope, the upper end of the punch is fixed with the slot, the guide slope is in contact with the guide surface, the fourth elastic member is arranged at the front end of the rod body, one end of the fourth elastic member is in elastic contact with the front end of the rod body, and the other end of the fourth elastic member is in elastic contact with the outside.

[0010] As a preferred solution, the first elastic member, the second elastic member, the third elastic member and the fourth elastic member are all springs.

[0011] As a preferred solution, the bracket includes a longitudinal bracket body and a transverse bracket body, both of which have the aforementioned accommodating space. A limiting portion is protruding from the longitudinal bracket body, and the transverse bracket body can be movably arranged on the longitudinal bracket body up and down. When the transverse bracket body moves downward into place, the lower end of the transverse bracket body abuts against the limiting portion.

[0012] As a preferred solution, the rear end of the rod body has a guide portion for contacting and guiding the convex portion.

[0013] A stamping die comprises a lower die, an upper die and the aforementioned cam-type stamping mechanism; the lower die has a stamping opening; the upper die is movably arranged above the lower die, and the upper die is provided with a first empty slot and a second empty slot that are interconnected, the first empty slot extending forward and backward, the second empty slot extending upward and downward and being directly connected to the stamping opening; the cam-type stamping mechanism is arranged on the lower die, the stamping rod is located in the first empty slot, and the punch is movably located in the second empty slot.

[0014] As a preferred solution, guide columns are provided at the four corners of the lower mold, and the upper mold is provided with a plurality of guide holes, and the guide columns pass through the corresponding guide holes for guidance and positioning.

[0015] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0016] By elastically contacting one end of the first elastic member with the inner wall surface of the accommodating space, the working hook can be moved forward and backward to elastically contact with the other end of the first elastic member, and the first hook is adapted to the tooth groove of the driving gear. When the upper mold moves downward, the driving gear moves downward accordingly, and the first hook cooperates with the tooth groove of the driving gear and moves backward, and the first elastic member is compressed. Subsequently, the upper mold moves upward, and the driving gear moves upward accordingly. The first elastic member elastically recovers, and the working hook moves forward, causing the driving gear to rotate counterclockwise, thereby driving the cam to rotate counterclockwise. During the rotation of the cam, the cam controls the cam through the convex portion. The punch moves up and down for stamping. For stamping complex products, it is only necessary to increase the number of cams, and simultaneous stamping can be achieved without spending a lot of adjustment time. If stamping is not required at the same time, the position relationship of the convex parts of different cams can be simply adjusted. In addition, the cam design structure is simple, and accidents are not prone to occur during continuous stamping. In addition, this structure can solve the problems of slow stamping speed, complex debugging, and large space occupation when special products need to be removed from the PIN during the stamping process and are formed. The maximum number of punches when the cylinder is in multiple motions can only reach 200 times / minute, while the cam structure has been verified to actually reach more than 500 times / minute.

[0017] In order to more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of an assembly perspective view of a preferred embodiment of the present utility model;

[0019] Figure 2 This is a schematic three-dimensional assembly diagram of a preferred embodiment of the present invention from another angle;

[0020] Figure 3 It is a cross-sectional view of a preferred embodiment of the present utility model at a first angle;

[0021] Figure 4 It is a cross-sectional view of the second angle of the preferred embodiment of the present utility model;

[0022] Figure 5 It is a cross-sectional view of the preferred embodiment of the present utility model from a third angle;

[0023] Figure 6 It is an enlarged schematic diagram of the cam-type punching mechanism in the preferred embodiment of the present utility model.

[0024] Description of the accompanying drawings:

[0025] 10. Lower die 11. Punching port

[0026] 12. Guide column 20. Upper die

[0027] 21. First empty slot 22. Second empty slot

[0028] 23. Guide hole 30. Bracket

[0029] 301, accommodating space 31, longitudinal bracket body

[0030] 311, limit portion 32, horizontal bracket body

[0031] 41. Transmission shaft 42. Driving gear

[0032] 43. Cam 431. Protrusion

[0033] 50. Driving structure 51. First elastic member

[0034] 52. Working hook 521. First hook

[0035] 60. Punch rod 61. Punch

[0036] 611, guide slope 62, rod body

[0037] 621, slot 622, guide surface

[0038] 63. Fourth elastic member 70. Retraction prevention structure

[0039] 71. Bearing 72. Shaft

[0040] 73. Retraction hook 731. Second hook

[0041] 74. Interference member 75. Second elastic member

[0042] 80. Reduction structure 81. Reduction gear

[0043] 82. Deceleration hook 821. Third hook

[0044] 83. A third elastic member. DETAILED DESCRIPTION

[0045] Please refer to Figures 1 to 6 As shown, it shows the specific structure of a preferred embodiment of the present utility model, including a lower mold 10, an upper mold 20 and a cam-type stamping mechanism.

[0046] The lower die 10 has a punching opening 11 . In this embodiment, guide posts 12 are provided at the four corners of the lower die 10 .

[0047] The upper mold 20 can be movably arranged above the lower mold 10, and the upper mold 20 is provided with a first empty slot 21 and a second empty slot 22 that are connected to each other. The first empty slot 21 extends forward and backward, and the second empty slot 22 extends up and down and is connected to the stamping port 11 directly opposite to each other. In this embodiment, the upper mold 20 is provided with a plurality of guide holes 23, and the aforementioned guide columns 12 pass through the corresponding guide holes 23 for guidance and positioning.

[0048] The cam type stamping mechanism is arranged on the lower mold 10, and the cam type stamping mechanism includes a bracket 30, a transmission shaft 41, a driving gear 42, a cam 43, a driving structure 50 and a stamping rod 60; a accommodating space 301 is provided in the bracket 30; the transmission shaft 41 is arranged in the accommodating space 301; the driving gear 42 is arranged on the transmission shaft 41 and drives the transmission shaft 41 to rotate; the driving structure 50 is arranged in the accommodating space 301 and controls the driving gear 42 to rotate or remain stationary; the cam 43 is arranged on the transmission shaft 41 and rotates with the rotation of the transmission shaft 41, and a convex portion 431 extends outward from the periphery of the cam 43, and the driving structure 50 includes a first elastic member 51 and a working hook 52, one end of the first elastic member 51 elastically conflicts with the inner wall surface of the accommodating space 301, and the working hook 52 can move back and forth and elastically contact the other end of the first elastic member 51, The work card hook 52 has a first hook portion 521, which is adapted to the tooth groove of the active gear 42; the punching rod 60 is arranged at the front side of the cam 43, and the punching rod 60 has a punch 61 that can move up and down; when the cam 43 rotates, the cam 43 controls the punch 61 to move up and down through the convex portion 431; in this embodiment, the bracket 30 includes a longitudinal bracket body 31 and a transverse bracket body 32, and the longitudinal bracket body 31 and the transverse bracket body 32 both have the aforementioned accommodating space 301, and a limiting portion 311 is convexly provided on the longitudinal bracket body 31, and the transverse bracket body 32 can be movably arranged on the longitudinal bracket body 31. When the transverse bracket body 32 moves downward into place, the lower end of the transverse bracket body 32 abuts against the limiting portion 311. Specifically, the longitudinal bracket body 31 is arranged on the lower mold 10, and the transverse bracket body 32 is arranged on the upper mold 20 and moves up and down with the upper mold 20.

[0049] And, it further includes a back-stop structure 70 and a deceleration structure 80, the back-stop structure 70 includes two bearings 71, a shaft body 72, a back-stop hook 73, an interference member 74 and a second elastic member 75, the two bearings 71 are respectively axially connected to the two inner wall surfaces of the accommodating space 301, the two ends of the shaft body 72 are respectively arranged at the edges of the two bearings 71, the back-stop hook 73 is arranged on the shaft body 72, the back-stop hook 73 has a second hook portion 731, the second hook portion 731 is adapted to the tooth groove of the driving gear 42, the interference member 74 is arranged in the accommodating space 301, one end of the interference member 74 contacts the back-stop hook 73, and the second elastic member 75 is arranged in the accommodating space 301 One end of the second elastic member 75 elastically conflicts with the outside, and the other end of the second elastic member 75 elastically contacts with the other end of the interference member 74; the deceleration structure 80 includes a deceleration gear 81, a deceleration hook 82 and a third elastic member 83. The deceleration gear 81 is arranged on the transmission shaft 41 and rotates with the rotation of the transmission shaft 41. The deceleration hook 82 is arranged in the accommodating space 301. The deceleration hook 82 has a third hook portion 821, and the third hook portion 821 is adapted to the tooth groove of the deceleration gear 81. The third elastic member 83 is arranged in the accommodating space 301. One end of the third elastic member 83 elastically conflicts with the outside, and the other end of the third elastic member 83 elastically contacts with the third hook portion 821. In this embodiment, the punching rod 60 includes a rod body 62 and a fourth elastic member 63. A slot 621 is provided on the rod body 62. The slot 621 has a guide surface 622. The upper end of the punch 61 has a guide slope 611. The upper end of the punch 61 is fixed with the slot 621. The guide slope 611 is in contact with the guide surface 622. The fourth elastic member 63 is provided at the front end of the rod body 62. One end of the fourth elastic member 63 is elastically connected to the front end of the rod body 62. The other end of the fourth elastic member 63 elastically contacts the outside; the punching rod 60 is located in the first empty slot 21, and the punch 61 is movable up and down in the second empty slot 22. Specifically, the rod body 62 and the fourth elastic member 63 are both located in the first empty slot 21; and the rear end of the rod body 62 has a guide portion 623 for contacting and guiding the protrusion 431; the first elastic member 51, the second elastic member 75, the third elastic member 83 and the fourth elastic member 63 are all springs.

[0050] The working process of this embodiment is described in detail as follows:

[0051] First, the upper mold 20 moves downward and drives the transverse bracket body 32 to move downward. After the transverse bracket body 32 moves downward into place, the working hook 52 moves backward and compresses the first elastic member 51. Then, the upper mold 20 moves upward and drives the transverse bracket body 32 to move upward. The first elastic member 51 elastically recovers and pushes the working hook 52 forward, causing the driving gear 42 to rotate counterclockwise and drive the cam 43 to rotate counterclockwise. During the rotation process, the protrusion 432 contacts the guide part 623 for guidance, and the rod body 62 is pushed forward. The rod body 62 compresses the fourth elastic member 63, and in the process of pushing the rod body 62 forward, the punch 61 moves downward and punches the terminal sheet under the cooperation of the guide slope 611 and the guide surface 622. Then, the fourth elastic member 63 elastically recovers, and the punch 61 moves upward, so that the upper end of the punch 61 is re-matched and fixed with the slot 621. During the entire working process, the anti-retraction structure 70 effectively prevents the driving gear 42 from rotating clockwise, and the deceleration structure 80 effectively prevents the driving gear 42 from rotating too fast, avoiding repeated punching of the punch 61. The second elastic member 75 and the third elastic member 83 both provide a buffering effect to prevent damage to the corresponding components and extend the service life.

[0052] The design focus of the utility model is that: by elastically contacting one end of the first elastic member with the inner wall surface of the accommodating space, the working hook can be moved forward and backward to elastically contact with the other end of the first elastic member, the first hook is adapted to the tooth groove of the driving gear, and when the upper mold moves downward, the driving gear moves downward accordingly, the first hook cooperates with the tooth groove of the driving gear and moves backward, the first elastic member is compressed, and then the upper mold moves upward, the driving gear moves upward accordingly, the first elastic member elastically recovers, the working hook moves forward, causing the driving gear to rotate counterclockwise, thereby driving the cam to rotate counterclockwise, and during the rotation of the cam, the cam The wheel controls the up and down movement of the punch through the convex part. For the stamping of complex products, it is only necessary to increase the number of cams, and simultaneous stamping can be achieved without spending a lot of adjustment time. If stamping is required at different times, the position relationship of the convex parts between different cams can be simply adjusted. In addition, the cam design structure is simple, and accidents are not prone to occur during continuous stamping. In addition, this structure can solve the problems of slow stamping speed, complex debugging, and large space occupation when special products need to be removed from PINs and formed during the stamping process. When the cylinder has multiple actions, the number of strokes can only reach 200 times / minute at most, while the cam structure has been verified to actually reach more than 500 times / minute.

[0053] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A cam-type punching mechanism, characterized in that: The cam is provided on the transmission shaft and rotates with the rotation of the transmission shaft, and a convex portion extends outward from the periphery of the cam; the driving structure includes a first elastic member and a working hook, one end of the first elastic member elastically contacts the inner wall surface of the accommodating space, and the working hook can be moved back and forth and elastically contacted with the other end of the first elastic member, and the working hook has a first hook portion, which is adapted to the tooth groove of the driving gear; the punching rod is provided on the front side of the cam, and the punching rod has a punch that can move up and down; when the cam rotates, the cam controls the punch to move up and down through the convex portion.

2. The cam-type punching mechanism according to claim 1, characterized in that: It further includes a back-stop structure, which includes two bearings, a shaft, a back-stop hook, an interference member and a second elastic member. The two bearings are respectively axially connected to the two inner wall surfaces of the accommodating space, and the two ends of the shaft are respectively arranged at the edges of the two bearings. The back-stop hook is arranged on the shaft, and the back-stop hook has a second hook portion, which is adapted to the tooth groove of the driving gear. The interference member is arranged in the accommodating space, and one end of the interference member contacts the back-stop hook. The second elastic member is arranged in the accommodating space, and one end of the second elastic member elastically conflicts with the outside, and the other end of the second elastic member elastically contacts the other end of the interference member.

3. The cam-type punching mechanism according to claim 1, characterized in that: It further includes a deceleration structure, which includes a deceleration gear, a deceleration hook and a third elastic member. The deceleration gear is arranged on the transmission shaft and rotates with the rotation of the transmission shaft. The deceleration hook is arranged in the accommodating space. The deceleration hook has a third hook portion, which is adapted to the tooth groove of the deceleration gear. The third elastic member is arranged in the accommodating space, one end of the third elastic member elastically contacts the outside, and the other end of the third elastic member elastically contacts the third hook portion.

4. The cam-type punching mechanism according to claim 1, characterized in that: The punching rod includes a rod body and a fourth elastic member. A slot is provided on the rod body. The slot has a guide surface. The upper end of the punch has a guide slope. The upper end of the punch is fixed with the slot. The guide slope is in contact with the guide surface. The fourth elastic member is arranged at the front end of the rod body. One end of the fourth elastic member is in elastic contact with the front end of the rod body, and the other end of the fourth elastic member is in elastic contact with the outside.

5. The cam-type punching mechanism according to claim 4, characterized in that: The first elastic member, the second elastic member, the third elastic member and the fourth elastic member are all springs.

6. The cam-type punching mechanism according to claim 1, characterized in that: The bracket includes a longitudinal bracket body and a transverse bracket body, both of which have the aforementioned accommodating space. A limiting portion is protruded from the longitudinal bracket body, and the transverse bracket body can be movably arranged on the longitudinal bracket body up and down. When the transverse bracket body moves downward into position, the lower end of the transverse bracket body abuts against the limiting portion.

7. The cam-type punching mechanism according to claim 4, characterized in that: The rear end of the rod body has a guide portion for contacting and guiding the convex portion.

8. A stamping die, characterized in that: It includes a lower die, an upper die and a cam-type stamping mechanism as described in any one of claims 1 to 7; the lower die has a stamping port; the upper die is movably arranged above the lower die, and the upper die is provided with a first empty slot and a second empty slot that are interconnected, the first empty slot extends front to back, and the second empty slot extends up and down and is connected to the stamping port oppositely; the cam-type stamping mechanism is arranged on the lower die, the stamping rod is located in the first empty slot, and the punch is movably located in the second empty slot.

9. The stamping die according to claim 8, characterized in that: The four corners of the lower mold are each provided with a guide column, and the upper mold is provided with a plurality of guide holes, and the guide columns pass through the corresponding guide holes for guidance and positioning.

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