An automatic positioning device for precision sheet metal stamping

Abstract

The present invention relates to the technical field of sheet metal stamping processing, and specifically relates to an automatic positioning device for precision sheet metal stamping processing, which includes a frame and a driving plate movably arranged on the frame. It further includes: a positioning mechanism, which is arranged on the frame and is located below the driving plate. The driving plate is hydraulically driven and can move up and down in the vertical direction. A first positioning member is fixedly installed at the bottom of the driving plate. When the driving plate drives the first positioning member to descend, the first positioning member can cooperate with the positioning mechanism to stamp the workpiece into a circular tube shape; a circular tube transfer mechanism and a feeding mechanism are respectively installed on both sides of the frame, and the two are triggered in sequence after the first positioning member is separated from the formed circular tube. Through the mechanical interlocking method, the device links the functions of workpiece positioning, finished product transfer, and workpiece replenishment, can effectively improve the processing efficiency, reduce manual operation, can greatly increase the output, and is suitable for popularization and use.

Description

Technical Field

[0001] The present invention relates to the technical field of sheet metal stamping processing, and specifically, it is an automatic positioning device for precision sheet metal stamping processing. Background Art

[0002] Sheet metal parts have the characteristics of light weight, high strength, electrical conductivity (able to be used for electromagnetic shielding), low cost, and good mass production performance. With the increasingly wide application of sheet metal, the design of sheet metal parts has become a very important part in the product development process. Mechanical engineers must master the design techniques of sheet metal parts proficiently. During the processing of sheet metal parts, stamping machines are required for stamping to make the designed sheet metal meet the requirements of product functions and appearances, etc.

[0003] Nowadays, during stamping work, most molds adopt a fixed design. Whenever the workpiece stamping is completed, the formed sheet metal part remains in the mold. At this time, it is necessary to transfer the formed sheet metal part in order to carry out the next round of processing. This transfer operation is generally manually taken by on-site staff, or the staff activates the corresponding control switch, and a cylinder or other driving parts are used to transfer the formed sheet metal part located in the mold out of the mold. However, this transfer process usually involves multiple actions. Specifically, usually, the formed sheet metal part needs to be lifted out of the mold first before the next peeling action can be carried out. The entire demolding process is rather cumbersome. Moreover, setting a lifting part in the mold will affect the flatness of the contact surface between the mold and the workpiece, and it is easy to cause uneven stress at the corresponding position of the sheet metal part after stamping, which may lead to the non-compliance of the size of the formed sheet metal part. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic positioning device for precision sheet metal stamping processing to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] An automatic positioning device for precision sheet metal stamping processing, including a frame and a driving plate movably arranged on the frame, and further including:

[0007] A positioning mechanism, arranged on the frame and located below the driving plate. The driving plate is hydraulically driven and can move up and down in the vertical direction. A first positioning part is fixedly installed at the bottom of the driving plate. When the driving plate drives the first positioning part to descend, the first positioning part can cooperate with the positioning mechanism to make the workpiece be stamped into a circular tube shape;

[0008] The circular tube transfer mechanism and the feeding mechanism are respectively installed on both sides of the frame. After the first positioning member is separated from the formed circular tube, the two are triggered in sequence. The circular tube transfer mechanism can perform a separating action on the circular tube located on the positioning mechanism, and the feeding mechanism can convey the workpiece to be stamped between the first positioning member and the positioning mechanism.

[0009] As a further solution of the present invention: The positioning mechanism includes a second positioning member fixedly installed on the frame and a rod movably disposed on the frame. The rod is located between the first positioning member and the second positioning member. A guiding positioning member is also fixedly installed on one side of the frame facing the feeding mechanism. The feeding mechanism can cause the workpiece to move through the guiding positioning member to between the first positioning member and the rod. A vertical plate is fixed on the frame, and a sliding plate is slidably disposed on the vertical plate. The sliding plate is connected to an elastic telescopic rod installed on the frame, and the rod is fixed to the sliding plate.

[0010] As a further solution of the present invention: The bottom of the first positioning member is provided with a first arc-shaped notch, the upper part of the second positioning member is provided with a second arc-shaped notch, and inclined surfaces are formed on both sides of the second arc-shaped notch. A cutting knife is also fixedly installed at the bottom of the first positioning member, and the cutting knife is used to perform a cutting action on the plate during stamping.

[0011] As a further solution of the present invention: The circular tube transfer mechanism includes a driven structure disposed on the side of the frame and a circumferential rotation assembly cooperating with the driven structure. The circumferential rotation assembly includes a cam rotatably installed on the side of the frame and a convex column fixedly disposed on the cam. The rotation shaft of the cam is connected to a one-way transmission structure, and the one-way transmission structure is also connected to the feeding mechanism.

[0012] As a further solution of the present invention: The driven structure includes a cross bar fixed to the side of the frame, a crosswise moving rod slidably disposed on the cross bar, and a material pushing rod fixedly connected to the crosswise moving rod. One end of the material pushing rod away from the crosswise moving rod is arc-shaped and is located above the rod. A strip-shaped through groove adapted to the convex column is provided on the crosswise moving rod, and the convex column penetrates through the strip-shaped through groove and is slidably connected to the crosswise moving rod.

[0013] As a further solution of the present invention: Two guiding plates are fixed on one side of the frame facing the guiding positioning member. Two guiding grooves are respectively provided on the two guiding plates. A slider is slidably fitted in each of the two guiding grooves on the guiding plate. The feeding mechanism includes a circular roller rotatably installed between two opposite sliders;

[0014] A double-headed cylinder is installed on the side of one of the guide plates. The two ends of the double-headed cylinder are respectively fixed to the two sliders. The rotating shafts of the two round rollers are connected to the one-way transmission structure through a sliding sleeve assembly.

[0015] As a further scheme of the present invention: The sliding sleeve assembly includes a rotating shaft rotatably installed on the side of the frame and two sleeves slidably sleeved on the rotating shaft through a limiting structure. The two sleeves are respectively rotatably connected to the two sliders, and the sleeves are connected to the rotating shaft of the round roller through a second bevel gear set.

[0016] As a further scheme of the present invention: The limiting structure includes two strip-shaped protruding parts formed on the outer wall of the rotating shaft and two strip-shaped grooves formed on the inner wall of the sleeve. The strip-shaped grooves are adapted to the strip-shaped protruding parts, and both are parallel to the central axis of the rotating shaft.

[0017] As a further scheme of the present invention: The one-way transmission structure includes a first driven shaft and a second driven shaft rotatably installed on the frame, and a first ratchet and a second ratchet respectively fixed on the first driven shaft and the second driven shaft;

[0018] Wherein, a ratchet plate cooperating with the first ratchet and the second ratchet is fixed on the driving plate member. The first driven shaft is connected to the rotating shaft of the cam through a transmission belt, and the second driven shaft is connected to the rotating shaft through a first bevel gear set.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] During work, through the cooperation between the first positioning member and the positioning mechanism, the first positioning member presses down, so that the workpiece is formed between the first positioning member and the positioning mechanism. In the positioning mechanism, the rod body acts as a part of the mold, and the rod body is movably arranged through an elastic telescopic rod. After the first positioning member is lifted, the elastic telescopic rod can drive the rod body to rebound and drive the formed sheet metal part to automatically lift. There is no need to set other driving components to lift the formed sheet metal part, thus effectively simplifying the demoulding process. At the same time, it also avoids the problem that the flatness of the contact between the workpiece and the mold is poor due to the setting of a lifter in the mold, resulting in the unqualified size of the formed sheet metal part;

[0021] Secondly, after the rod body drives the formed sheet metal part to lift, the lifting action of the first positioning member can trigger the round tube transfer mechanism. The round tube transfer mechanism can automatically move circumferentially along the rod body to peel off the formed sheet metal part located on the rod body, thus realizing the automation of the demoulding process;

[0022] In addition, after the above-mentioned demolding process ends, the first positioning member further prompts the feeding mechanism to be triggered, and the feeding mechanism automatically replenishes the material to be processed below the first positioning member. Therefore, mechanical interlocking of the feeding, stamping, and demolding functions in sheet metal stamping can be achieved, simplifying the entire process of sheet metal stamping. Brief Description of the Drawings

[0023] Figure 1 Isometric view of an embodiment of an automatic positioning device for precision sheet metal stamping processing.

[0024] Figure 2 Structural schematic diagram of an embodiment of an automatic positioning device for precision sheet metal stamping processing.

[0025] Figure 3 Structural schematic diagram of another angle of an embodiment of an automatic positioning device for precision sheet metal stamping processing.

[0026] Figure 4 Structural schematic diagram of yet another angle of an embodiment of an automatic positioning device for precision sheet metal stamping processing.

[0027] Figure 5 For Figure 3 Enlarged structural view of part A in

[0028] Figure 6 Structural schematic diagram of the feeding mechanism in an embodiment of an automatic positioning device for precision sheet metal stamping processing.

[0029] Figure 7 Structural schematic diagram of the round tube transfer mechanism in an embodiment of an automatic positioning device for precision sheet metal stamping processing.

[0030] Figure 8 Structural schematic diagram of the positioning mechanism in an embodiment of an automatic positioning device for precision sheet metal stamping processing.

[0031] In the figure: 1, frame; 2, first positioning member; 201, first arc-shaped notch; 3, second positioning member; 301, inclined surface; 302, second arc-shaped notch; 4, rod body; 5, vertical plate; 6, sliding plate; 7, elastic telescopic rod; 8, driving plate member; 9, cutter; 10, guiding positioning member; 11, first driven shaft; 12, second driven shaft; 13, ratchet plate; 14, first ratchet; 15, second ratchet; 16, transmission belt; 17, first bevel gear set; 18, guiding plate; 19, slider; 20, round roller; 21, rotating shaft; 22, sleeve; 23, second bevel gear set; 24, double-headed cylinder; 25, cam; 2501, convex column; 26, material pushing rod; 27, cross bar; 28, transverse moving member; 2801, strip-shaped through groove. Detailed Description of the Invention

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0034] See also Figures 1 - 8 In an embodiment of the present invention, a precision sheet metal stamping processing automatic positioning device includes a frame 1 and a driving plate 8 movably arranged on the frame 1, and also includes:

[0035] A positioning mechanism is provided on the frame 1 and is located below the driving plate 8. The driving plate 8 is driven by hydraulic pressure and can be lifted and lowered in the vertical direction. A first positioning member 2 is fixedly installed at the bottom of the driving plate 8. When the driving plate 8 drives the first positioning member 2 to descend, the first positioning member 2 can cooperate with the positioning mechanism to punch the workpiece into a round tube shape.

[0036] The round tube transfer mechanism and the feeding mechanism are respectively installed on both sides of the frame 1. The two are triggered in sequence after the first positioning member 2 is separated from the formed round tube. The round tube transfer mechanism can perform a pulling action on the round tube located on the positioning mechanism, and the feeding mechanism can transport the workpiece to be stamped between the first positioning member 2 and the positioning mechanism.

[0037] Further, in actual processing, the workpiece to be punched is located between the first positioning member 2 and the positioning mechanism, and the driving plate 8 is driven down by hydraulic pressure. Therefore, under the cooperation of the first positioning member 2 and the positioning mechanism, the workpiece is punched to form a round tube. Subsequently, the driving plate 8 is driven by hydraulic pressure to rise and reset. During the process of the driving plate 8 separating from the round tube and continuing to rise, the round tube transfer mechanism and the feeding mechanism are triggered in sequence. The round tube transfer mechanism first performs a pulling action on the formed round tube, so that the round tube is separated from the positioning mechanism, and then the feeding mechanism transports the workpiece to be punched to the bottom of the first positioning member 2;

[0038] In summary, through the mutual cooperation among various mechanisms and components, during processing, the stamping forming of the workpiece is achieved through the cooperation between the first positioning member 2 and the positioning mechanism. After the workpiece is formed, the round tube transfer mechanism and the feeding mechanism can be triggered in sequence, thereby realizing the automatic stripping function of the pipe fitting and the effect of automatically supplementing the workpiece to be processed below the first positioning member 2. In this way, through the mechanical interlocking method, the functions of workpiece positioning, finished product transfer, and workpiece supplement are linked, which can effectively improve the processing efficiency, reduce manual operations, greatly increase the output, and is suitable for popularization and use.

[0039] Please refer to again Figure 4 and Figure 8 , the positioning mechanism includes a second positioning member 3 fixedly installed on the frame 1 and a rod body 4 movably arranged on the frame 1. The rod body 4 is located between the first positioning member 2 and the second positioning member 3. A guiding positioning member 10 is also fixedly installed on one side of the frame 1 facing the feeding mechanism. The feeding mechanism can prompt the workpiece to move through the guiding positioning member 10 to between the first positioning member 2 and the rod body 4. A vertical plate 5 is fixedly installed on the frame 1, and a sliding plate 6 is slidably arranged on the vertical plate 5. The sliding plate 6 is connected to an elastic telescopic rod 7 installed on the frame 1. The rod body 4 is fixed to the sliding plate 6. A first arc-shaped notch 201 is provided at the bottom of the first positioning member 2, and a second arc-shaped notch 302 is provided at the upper part of the second positioning member 3. Inclined surfaces 301 are formed on both sides of the second arc-shaped notch 302. A cutting knife 9 is also fixedly installed at the bottom of the first positioning member 2. The cutting knife 9 is used to perform a cutting action on the plate during stamping.

[0040] In the specific implementation of this application, the workpiece to be processed does not need to be cut. The staff needs to pass the workpiece to be processed through the guiding positioning member 10 and extend it between the first positioning member 2 and the rod body 4. During the process of the hydraulic drive causing the driving plate 8 to descend, the cutting knife 9 will cut the workpiece. After the first positioning member 2 acts on the rod body 4, it prompts the rod body 4 to descend, so that the elasticity inside the elastic telescopic rod 7 is compressed. Subsequently, both sides of the workpiece will respectively contact the two inclined surfaces 301. Then, the rod body 4 enters the second arc-shaped notch 302, prompting both sides of the workpiece to bend, so that the workpiece forms a round tube sleeved on the outer periphery of the rod body 4.

[0041] Please refer to again Figure 2 and Figure 7, the circular tube transfer mechanism includes a driven structure provided on the side of the frame 1 and a circumferential rotation assembly cooperating with the driven structure. The circumferential rotation assembly includes a cam 25 rotatably mounted on the side of the frame 1 and a convex column 2501 fixedly provided on the cam 25. The rotation shaft of the cam 25 is connected with a one-way transmission structure, and the one-way transmission structure is also connected with the feeding mechanism. The driven structure includes a cross bar 27 fixed to the side of the frame 1, a crosswise moving rod 28 slidably arranged on the cross bar 27, and a material pushing rod 26 fixedly connected with the crosswise moving rod 28. One end of the material pushing rod 26 away from the crosswise moving rod 28 is arc-shaped and is located above the rod body 4. A strip-shaped through slot 2801 adapted to the convex column 2501 is provided on the crosswise moving rod 28, and the convex column 2501 penetrates through the strip-shaped through slot 2801 and is slidably connected with the crosswise moving rod 28.

[0042] During the rising process of the first positioning member 2, the spring in the elastic telescopic rod 7 will rebound, so that the rod body 4 and the circular tube sleeved on the rod body 4 will rise. After the spring in the elastic telescopic rod 7 finishes rebounding, that is, after the first positioning member 2 is separated from the circular tube, the one-way transmission structure is triggered. The one-way transmission structure first drives the cam 25 to rotate one week. Correspondingly, the convex column 2501 completes a circular motion, and through the sliding fit between the strip-shaped through slot 2801 and the crosswise moving rod 28, the crosswise moving rod 28 is urged to complete a reciprocating slide on the cross bar 27, and the material pushing rod 26 completes a reciprocating movement along the axial direction of the rod body 4, so as to be able to push away the circular tube sleeved on the rod body 4. Subsequently, the one-way transmission structure drives the feeding mechanism to move, and the feeding mechanism conveys the workpiece to be stamped and processed between the first positioning member 2 and the rod body 4 to realize the continuity of processing.

[0043] Please refer to again Figure 1 , Figure 5 and Figure 6 , two guide plates 18 are fixed on one side of the frame 1 facing the guiding and positioning member 10. Two guide grooves are respectively provided on the two guide plates 18. A slider 19 is slidably fitted in each of the two guide grooves on the guide plate 18. The feeding mechanism includes a circular roller 20 rotatably mounted between two opposite sliders 19. A double-headed cylinder 24 is installed on the side of one of the guide plates 18. Two ends of the double-headed cylinder 24 are respectively fixed to the two sliders 19. The rotation shafts of the two circular rollers 20 are connected with the one-way transmission structure through a sliding fit assembly.

[0044] The sliding and sleeving assembly includes a rotating shaft 21 rotatably installed on the side of the frame 1 and two sleeves 22 slidably sleeved on the rotating shaft 21 through a limiting structure. The two sleeves 22 are respectively rotatably connected to the two sliders 19, and the sleeve 22 is connected to the rotating shaft of the round roller 20 through a second bevel gear set 23. The limiting structure includes two strip-shaped protruding parts formed on the outer wall of the rotating shaft 21 and two strip-shaped grooves formed on the inner wall of the sleeve 22. The strip-shaped grooves are adapted to the strip-shaped protruding parts, and both are parallel to the central axis of the rotating shaft 21.

[0045] Before the processing starts, control the double-headed cylinder 24 to drive the two sliders 19 to slide closer to each other until the two round rollers 20 clamp the workpiece. During this process, the two sleeves 22 slide closer to each other on the rotating shaft 21. Subsequently, when the one-way transmission structure drives the rotating shaft 21 to rotate, the rotating shaft 21 can drive the sleeve 22 to rotate through the strip-shaped protruding part and the strip-shaped groove. The sleeve 22 can drive the round roller 20 to rotate through the second bevel gear set 23, so that the workpiece located between the two round rollers 20 is conveyed between the first positioning member 2 and the rod body 4 through the guiding and positioning member 10.

[0046] Specifically, the second bevel gear set 23 includes a third bevel gear fixedly installed on the sleeve 22 and a fourth bevel gear fixedly installed on the rotating shaft of the round roller 20, and the fourth bevel gear meshes with the third bevel gear.

[0047] The one-way transmission structure includes a first driven shaft 11 and a second driven shaft 12 rotatably installed on the frame 1, and a first ratchet 14 and a second ratchet 15 respectively fixed on the first driven shaft 11 and the second driven shaft 12;

[0048] Among them, a ratchet plate 13 cooperating with the first ratchet 14 and the second ratchet 15 is fixed on the driving plate member 8. The first driven shaft 11 is connected to the rotating shaft of the cam 25 through a transmission belt 16, and the second driven shaft 12 is connected to the rotating shaft 21 through a first bevel gear set 17.

[0049] It should be noted that the first bevel gear set 17 includes a first bevel gear fixedly installed at one end of the second driven shaft 12 close to the rotating shaft 21 and a second bevel gear fixedly installed at the top of the rotating shaft 21. The second bevel gear meshes with the first bevel gear;

[0050] During the process of the driving plate 8 descending by hydraulic drive, the ratchet plate 13 will successively pass by the second ratchet wheel 15 and the first ratchet wheel 14. At this time, the second ratchet wheel 15 and the first ratchet wheel 14 do not rotate. However, during the ascending process of the driving plate 8, and after the first positioning member 2 is separated from the round tube sleeved on the rod body 4, the ratchet plate 13 will successively pass by the first ratchet wheel 14 and the second ratchet wheel 15. At this time, the first ratchet wheel 14 and the second ratchet wheel 15 will successively cooperate with the ratchets on the ratchet plate 13 and rotate successively. The first ratchet wheel 14 rotates, and the first driven shaft 11 drives the cam 25 to rotate one week through the transmission belt 16, so that the feeding rod 26 completes a reciprocating motion along the axial direction of the rod body 4, separating the round tube on the rod body 4. The second ratchet wheel 15 rotates, and the second driven shaft 12 drives the rotating shaft 21 to rotate through the first bevel gear set 17, so that the two round rollers 20 rotate synchronously but in different directions, and convey the workpiece through the guiding and positioning member 10 between the first positioning member 2 and the rod body 4.

[0051] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0052] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic positioning device for precision sheet metal stamping processing, characterized in that, It includes a frame and a driving plate movably arranged on the frame; a positioning mechanism is arranged on the frame and is located below the driving plate. The driving plate is hydraulically driven to move up and down in the vertical direction. A first positioning member is fixedly installed at the bottom of the driving plate. When the driving plate drives the first positioning member to descend, the first positioning member cooperates with the positioning mechanism so that the workpiece is stamped into a circular tube shape; the positioning mechanism includes a second positioning member fixedly installed on the frame and a rod movably arranged on the frame. The rod is located between the first positioning member and the second positioning member. A guiding and positioning member is also fixedly installed on one side of the frame facing the feeding mechanism. The feeding mechanism causes the workpiece to move through the guiding and positioning member to between the first positioning member and the rod. A vertical plate is fixedly installed on the frame, and a sliding plate is slidably arranged on the vertical plate. The sliding plate is connected to an elastic telescopic rod installed on the frame, and the rod is fixed to the sliding plate; A circular tube transfer mechanism and a feeding mechanism are respectively installed on both sides of the frame. They are triggered in sequence after the first positioning member is separated from the formed circular tube. The circular tube transfer mechanism performs a separating action on the circular tube located on the positioning mechanism, and the feeding mechanism conveys the workpiece to be stamped between the first positioning member and the positioning mechanism; The circular tube transfer mechanism includes a driven structure arranged on the side of the frame and a circumferential rotation assembly cooperating with the driven structure. The circumferential rotation assembly includes a cam rotatably installed on the side of the frame and a convex column fixedly arranged on the cam. The rotation shaft of the cam is connected with a one-way transmission structure, and the one-way transmission structure is also connected to the feeding mechanism. The driven structure includes a cross bar fixedly arranged on the side of the frame, a crosswise moving rod slidably arranged on the cross bar, and a material pushing rod fixedly connected to the crosswise moving rod. One end of the material pushing rod away from the crosswise moving rod is arc-shaped and is located above the rod. A strip-shaped through groove adapted to the convex column is arranged on the crosswise moving rod, and the convex column penetrates through the strip-shaped through groove and is slidably connected to the crosswise moving rod; Two guiding plates are fixedly installed on one side of the frame facing the guiding and positioning member. Two guiding grooves are respectively arranged on the two guiding plates. A slider is slidably fitted in each of the two guiding grooves on the guiding plate. The feeding mechanism includes a circular roller rotatably installed between two opposite sliders; A double-headed cylinder is installed on the side of one of the guiding plates, and both ends of the double-headed cylinder are respectively fixed to the two sliders. The rotation shafts of the two circular rollers are connected to the one-way transmission structure through a sliding sleeve assembly.

2. The automatic positioning device for precision sheet metal stamping according to claim 1, wherein A first arc-shaped notch is arranged at the bottom of the first positioning member, and a second arc-shaped notch is arranged at the upper part of the second positioning member. Inclined surfaces are formed on both sides of the second arc-shaped notch. A cutting knife is also fixedly installed at the bottom of the first positioning member, and the cutting knife is used to perform a cutting action on the plate during the stamping process.

3. The automatic positioning device for precision sheet metal stamping processing according to claim 2, characterized in that, The sliding sleeve assembly includes a rotating shaft rotatably installed on the side of the frame and two sleeves slidably sleeved on the rotating shaft through a limiting structure. The two sleeves are respectively rotatably connected to the two sliders, and the sleeves are connected to the rotation shaft of the circular roller through a second bevel gear set.

4. An automatic positioning device for precision sheet metal stamping processing according to claim 3, characterized in that, The limiting structure includes two strip-shaped protruding portions formed on the outer wall of the rotating shaft and two strip-shaped grooves arranged on the inner wall of the sleeve. The strip-shaped grooves are adapted to the strip-shaped protruding portions, and both of them are parallel to the central axis of the rotating shaft.

5. The automatic positioning device for precision sheet metal stamping processing according to claim 4, characterized in that, The one-way transmission structure includes a first driven shaft and a second driven shaft rotatably mounted on the frame, and a first ratchet wheel and a second ratchet wheel respectively fixed on the first driven shaft and the second driven shaft; A ratchet plate that cooperates with the first ratchet wheel and the second ratchet wheel is fixed on the driving plate member. The first driven shaft is connected to the rotating shaft of the cam through a transmission belt, and the second driven shaft is connected to the rotating shaft through a first bevel gear set.

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