Punch forming mechanism for burr-free cover body

Abstract

The utility model relates to the technical field of stamping machining of cover bodies, in particular to a stamping forming mechanism of a burr-free cover body. A lower die base, an upper die base, a guide connecting piece connected between the lower die base and the upper die base, a lower die punching assembly connected to the lower die base and an upper die punching assembly connected to the upper die base and located above the lower die punching assembly are adopted. The upper die punching assembly and the lower die punching assembly are matched to cut off a formed cover body from a material plate, collapse corners, namely chamfers are formed on the peripheries of the upper face and the lower face of the cover body, burrs on the peripheries of the cover body are directly removed, the flatness of a cover plate of the cover body can be improved, and the production efficiency is improved. And poor overall perpendicularity and coaxiality of the product caused by unevenness after the cover body is assembled on the shell are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of stamping processing of cover bodies, in particular to a stamping forming mechanism for a burr-free cover body. Background Art

[0002] A stamping die is a special process equipment used to process materials (metal or non-metal) into parts (or semi-finished products) during the cold stamping process. This is called a cold stamping die (commonly known as a cold die). Stamping is a pressure processing method that uses a die mounted on a press at room temperature to apply pressure to the material, causing it to separate or plastically deform, thereby obtaining the desired part.

[0003] The housing of the motor is usually composed of an outer shell and a cover body arranged on the outer shell. Usually, a continuous stamping method is adopted to gradually stamp out a material sheet to obtain multiple cover bodies.

[0004] like Figure 8 As shown, the existing continuously stamped cover includes a cover plate 12, a convex cap 13 protruding from the top of the cover plate 12, and a positioning protrusion 14 protruding from the bottom of the cover plate 12, and the cover plate 12 has a through hole. However, the cover formed by the existing continuous stamping mold has obvious burrs on the periphery of the cover body, and the cover plate 12 of the cover body has a low flatness. After the cover body is assembled on the shell, it is uneven, which can easily lead to unbalanced rotation when the motor is used subsequently, which has an adverse effect on the quality of the motor. Summary of the Invention

[0005] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a stamping forming mechanism for a burr-free cover.

[0006] The purpose of the utility model is achieved through the following technical solutions: a stamping and forming mechanism for a burr-free cover body, comprising a lower die base, an upper die base, a guide connecting piece connected between the lower die base and the upper die base, a lower die punching assembly connected to the lower die base, and an upper die punching assembly connected to the upper die base and located above the lower die punching assembly, wherein the upper die punching assembly and the lower die punching assembly cooperate to cut the formed cover body from the material plate and form collapsed angles on the upper and lower peripheries of the cover body.

[0007] Preferably, the lower die punching assembly includes a lower die punching module connected to the lower die base, and a lower die pre-punching tool head connected to the lower die punching module and protruding from the lower die punching module. The upper die punching assembly includes an upper die punching module connected to the upper die base, and an upper die pre-punching tool head connected to the upper die punching module. The upper die pre-punching tool head is provided with an upper die pre-punching blade. The lower die pre-punching tool head cooperates with the upper die pre-punching blade to pre-punch the material plate and raise the cover body as a whole to a certain height, so that the peripheral edge of the upper surface of the cover body forms a collapsed angle.

[0008] Preferably, the lower die punching assembly also includes a cover body positioning column connected to the lower die pre-punching head and protruding from the lower die pre-punching head, and the cover body positioning column is used to position the convex cap of the cover body; the upper die pre-punching edge is provided with a cover body clearance hole for making way for the convex cap of the cover body, and the depth of the upper die pre-punching edge is less than the thickness of the cover body.

[0009] Preferably, the lower die punching assembly also includes a lower die blanking cutter head connected to the lower die punching die group, and the lower die blanking cutter head is provided with a lower die blanking cutting edge; the upper die punching assembly also includes an upper die blanking cutter head connected to the upper die punching die group, and the upper die blanking cutter head and the lower die blanking cutting edge are used to cooperate to cut the formed cover body from the material plate and form a collapsed angle on the periphery of the lower surface of the cover body.

[0010] Preferably, a blanking hole communicating with the lower die blanking edge is provided at the bottom of the lower die blanking cutter head.

[0011] Preferably, the lower die punching die group is provided with a first buffering clearance groove between the lower die pre-punching cutter head and the lower die blanking cutter head; the upper die punching die group is provided with a second buffering clearance groove between the upper die pre-punching cutter head and the upper die blanking cutter head, and the first buffering clearance groove and the second buffering clearance groove are used to cooperate to avoid the cover body.

[0012] Preferably, the lower die punching die group includes a lower support plate, a lower clamping plate and a lower pad fixedly connected from top to bottom in sequence, the lower pad is fixedly connected to the lower die base, and the lower die pre-punching head and the lower die blanking head are both connected in the lower support plate and rest against the top of the lower clamping plate.

[0013] Preferably, the upper die punching die group includes a plurality of slide buckles, and an upper pad, a stop plate, an upper clamping plate and an upper support plate arranged in sequence from top to bottom, the upper and lower surfaces of the upper pad are fixedly connected to the upper die base and the stop plate respectively, the upper clamping plate and the upper support plate are fixedly connected, and a buffer space is provided between the stop plate and the upper clamping plate, and a plurality of slide buckles are fixedly distributed on both sides of the stop plate, and a plurality of sliding grooves that slide one by one with the buckle angles of the slide buckles are provided on both side surfaces of the upper support plate, and the buckle angles of the plurality of slide buckles all rest on the bottom surface of the upper clamping plate; the upper die pre-punching tool head is connected in the upper support plate and rests on the bottom of the upper clamping plate, and the lower die blanking tool head is connected to the stop plate and rests on the bottom of the upper pad and passes through the upper clamping plate and the upper support plate.

[0014] Preferably, the number of the guide connectors is at least 4, and the multiple guide connectors are evenly distributed. The guide connectors include a guide column connected to the lower mold base and a guide sleeve connected to the upper mold base. The guide column extends into the guide sleeve and slides with the guide sleeve.

[0015] The beneficial effects of the present invention are as follows: the stamping and forming mechanism of the burr-free cover body of the present invention adopts a lower die base, an upper die base, a guide connecting piece connected between the lower die base and the upper die base, a lower die punching assembly connected to the lower die base, and an upper die punching assembly connected to the upper die base and located above the lower die punching assembly. In the punching and blanking stage of punching the cover body by stamping the material plate, the upper die punching assembly and the lower die punching assembly are cooperated to cut the formed cover body from the material plate and form collapsed angles, i.e. chamfers, on the upper and lower peripheral edges of the cover body, directly removing burrs on the peripheral edge of the cover body, which is beneficial to improving the flatness of the cover plate of the cover body, avoiding unevenness after the cover body is assembled on the shell, resulting in poor overall verticality and coaxiality of the product, thereby affecting the overall verticality and coaxiality of the product, and greatly improving product quality, stability and consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 It is a cross-sectional schematic diagram of the present utility model;

[0018] Figure 3 yes Figure 2 A is an enlarged schematic diagram;

[0019] Figure 4 It is a structural schematic diagram of the lower die punching assembly of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the upper die punching assembly of the utility model;

[0021] Figure 6 It is a cross-sectional schematic diagram of the cover body of the present invention;

[0022] Figure 7 It is a cross-sectional schematic diagram of the cover and the housing of the utility model;

[0023] Figure 8 It is a structural schematic diagram of the cover body described in the background art;

[0024] Figure 9 It is a structural diagram of the cover and the shell described in the background art.

[0025] The accompanying drawings are marked as follows: 1. lower die base; 2. upper die base; 3. guide connector; 31. guide post; 32. guide sleeve; 4. lower die punching assembly; 41. lower die punching die set; 411. lower supporting plate; 412. lower clamping plate; 413. lower pad; 42. lower die pre-punching cutter head; 43. cover positioning post; 44. lower die blanking cutter head; 5. upper die punching assembly; 51. upper die punching die set; 511. slide buckle; 512. upper pad; 513. Stop plate; 514. Upper clamping plate; 515. Upper supporting plate; 52. Upper die pre-punching head; 53. Upper die blanking head; 6. Upper die pre-punching edge; 7. Cover body clearance hole; 8. Lower die blanking edge; 9. Blanking hole; 10. First buffer clearance groove; 11. Second buffer clearance groove; 12. Cover plate; 13. Convex cap; 14. Positioning protrusion; 15. Collapse angle; 16. Buffer space; 17. Slide groove; 18. Material plate. DETAILED DESCRIPTION

[0026] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and drawings. The contents mentioned in the embodiments are not intended to limit the present invention.

[0027] like Figure 1-6 As shown, a stamping and forming mechanism for a burr-free cover body includes a lower die base 1, an upper die base 2, a guide connecting member 3 connected between the lower die base 1 and the upper die base 2, a lower die punching assembly 4 connected to the lower die base 1, and an upper die punching assembly 5 connected to the upper die base 2 and located above the lower die punching assembly 4. The upper die punching assembly 5 and the lower die punching assembly 4 cooperate to cut the formed cover body from the material plate 18 and form collapsed angles 15 on the upper and lower peripheries of the cover body.

[0028] The punching and forming mechanism of the burr-free cover body adopts a lower die base 1, an upper die base 2, a guide connecting member 3 connected between the lower die base 1 and the upper die base 2, a lower die punching assembly 4 connected to the lower die base 1, and an upper die punching assembly 5 connected to the upper die base 2 and located above the lower die punching assembly 4. In the punching and blanking stage of punching the cover body by punching the material sheet 18, the upper die punching assembly 5 and the lower die punching assembly 4 cooperate to cut the formed cover body from the material sheet 18 and form collapsed angles 15 on the upper and lower peripheries of the cover body, i.e., chamfers, as shown in FIG. Figure 6 As shown, directly removing the burrs around the cover body is beneficial to improving the flatness of the cover plate 12 of the cover body, and avoiding unevenness after the cover body is assembled on the shell, which leads to poor verticality and coaxiality of the overall product.

[0029] Furthermore, the lower die punching assembly 4 includes a lower die punching module 41 connected to the lower die base 1, and a lower die pre-punching tool head 42 connected to the lower die punching module 41 and protruding from the lower die punching module 41. The upper die punching assembly 5 includes an upper die punching module 51 connected to the upper die base 2, and an upper die pre-punching tool head 52 connected to the upper die punching module 51. The upper die pre-punching tool head 52 is provided with an upper die pre-punching blade 6. The lower die pre-punching tool head 42 cooperates with the upper die pre-punching blade 6 to pre-punch the material plate 18 and raise the cover body as a whole to a certain height, so that the upper surface periphery of the cover body forms a collapsed angle 15. The lower die pre-punching blade 42 and the upper die pre-punching blade 6 are used to cooperate in pre-punching the formed cover body of the material plate 18. The shape and size of the inner wall surface of the upper die pre-punching blade 6 are the same as the shape and size of the outer wall surface of the cover body. During this period, when the cover body enters the upper die pre-punching blade 6, the outer peripheral corner of the upper surface of the cover body collides with the inner peripheral sharp corner of the upper die pre-punching blade 6, so that the upper surface of the cover body forms a collapsed angle 15, directly eliminating burrs, avoiding the cover body from being processed by other post-processing methods to remove stamping burrs, such as using a grinder or other grinding device to grind and remove burrs, thereby improving production efficiency and reducing production costs.

[0030] Furthermore, the lower die punching assembly 4 also includes a cover body positioning column 43 connected to the lower die pre-punching blade 42 and protruding from the lower die pre-punching blade 42, the cover body positioning column 43 is used to position the convex cap 13 of the cover body; the upper die pre-punching blade 6 is provided with a cover body clearance hole 7 for making way for the convex cap 13 of the cover body, the depth of the upper die pre-punching blade 6 is less than the thickness of the cover body, so that the cover body as a whole rises to a certain height without completely breaking and separating the cover body, and at the same time plays the role of flattening the cover plate 12 of the cover body; the cover body positioning column 43 is used to position the convex cap 13 of the cover body, and the cover body clearance hole 7 of the upper die pre-punching blade 6 makes way for the convex cap 13 of the cover body, so as to avoid the cover body from shifting during the pre-punching process and affecting the punching effect. Preferably, the depth of the upper die pre-punching blade 6 is one-quarter to three-quarters of the thickness of the cover body. In this embodiment, the depth of the upper die pre-punching blade 6 is one-half the thickness of the cover body.

[0031] Furthermore, the lower die punching assembly 4 also includes a lower die blanking cutter head 44 connected to the lower die punching die group 41, and the lower die blanking cutter head 44 is provided with a lower die blanking cutting edge 8; the upper die punching assembly 5 also includes an upper die blanking cutter head 53 connected to the upper die punching die group 51, and the upper die blanking cutter head 53 and the lower die blanking cutting edge 8 are used to cooperate to cut the formed cover body from the material plate 18 and form a collapsed angle 15 on the periphery of the lower surface of the cover body. After the sheet 18 is pre-punched, the upper die blanking cutter head 53 and the lower die blanking blade 8 are used to cut the formed cover body from the sheet 18. The shape and size of the inner wall surface of the lower die blanking blade 8 used are the same as the shape and size of the outer wall surface of the cover body. During this period, when the cover body enters the lower die blanking blade 8, the outer peripheral corner of the lower surface of the cover body collides with the inner peripheral corner of the pre-punching blade of the lower die, so that the peripheral edge of the lower surface of the cover body forms a collapsed angle 15, which directly eliminates burrs and avoids the cover body from being subjected to other post-processing methods to remove stamping burrs, such as using a grinder or other grinding device to grind and remove burrs, thereby improving production efficiency and reducing production costs.

[0032] Furthermore, a blanking hole 9 communicating with the lower die blanking edge 8 is provided at the bottom of the lower die blanking cutter head 44 so that the formed cover body can be discharged through the blanking hole 9 .

[0033] Furthermore, the lower die punching module 41 is provided with a first buffering clearance groove 10 between the lower die pre-punching head 42 and the lower die blanking head 44; the upper die punching module 5 is provided with a second buffering clearance groove 11 between the upper die pre-punching head 52 and the upper die blanking head 53. The first buffering clearance groove 10 and the second buffering clearance groove 11 cooperate to avoid the cover body. The first buffering clearance groove 10 and the second buffering clearance groove 11 cooperate to serve as a buffering idle station, located between the pre-punching process and the blanking process, which is more conducive to the rational layout of the upper die punching module 51 and the lower die punching module 41, and is conducive to enhancing the strength of the upper die punching module 51 and the lower die punching module 41.

[0034] Furthermore, the lower die punching die group 41 includes a lower support plate 411, a lower clamping plate 412 and a lower pad 413 fixedly connected from top to bottom, the lower pad 413 is fixedly connected to the lower die base 1, and the lower die pre-punching cutter head 42 and the lower die blanking cutter head 44 are both connected to the lower support plate 411 and rest against the top of the lower clamping plate 412.

[0035] Furthermore, the upper die punching die set 51 includes a plurality of slide buckles 511, and an upper pad 512, a stop plate 513, an upper clamping plate 514 and an upper supporting plate 515 arranged in sequence from top to bottom. The upper and lower surfaces of the upper pad 512 are fixedly connected to the upper die base 2 and the stop plate 513 respectively. The upper clamping plate 514 and the upper supporting plate 515 are fixedly connected. There is a buffer space 16 between the stop plate 513 and the upper clamping plate 514. The plurality of slide buckles 511 are fixedly distributed on On both sides of the stop plate 513, the two side surfaces of the upper support plate 515 are provided with a plurality of sliding grooves 17 that slide in conjunction with the buckle angles of the slider 511, and the buckle angles of the plurality of sliders 511 are all against the bottom surface of the upper clamping plate 514; the upper die pre-punching tool head 52 is connected to the upper support plate 515 and is against the bottom of the upper clamping plate 514, and the lower die blanking tool head 44 is connected to the stop plate 513 and is against the bottom of the upper pad 512 and passes through the upper clamping plate 514 and the upper support plate 515. The stop plate 513 is connected by multiple sliding buckles 511, and the buckle angles of the multiple sliding buckles 511 are all against the bottom surface of the upper clamping plate 514, which is conducive to the upper clamping plate 514 and the upper support plate 515 to rise and fall a certain distance relative to the upper pad 512 and the stop plate 513, so that after the stamping is completed, the lower die blanking cutter head 44 can be retracted into the upper support plate 515 to avoid the lower die blanking cutter head 44 rushing into the material plate 18 and clamping the material plate 18 to cause material jamming.

[0036] Furthermore, the number of the guide connectors 3 is at least four, and the multiple guide connectors 3 are evenly distributed. The guide connectors 3 include a guide post 31 connected to the lower die base 1 and a guide sleeve 32 connected to the upper die base 2. The guide post 31 extends into the guide sleeve 32 and slidably engages with the guide sleeve 32. In this embodiment, the number of the guide connectors 3 is four, and the four guide connectors 3 are distributed at the four corners between the lower die base 1 and the upper die base 2.

[0037] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present invention is within the scope of protection of the present invention.

Claims

1. A stamping mechanism for a burr-free cover, characterized in that: The cover comprises a lower die base, an upper die base, a guide connector connected between the lower die base and the upper die base, a lower die punching assembly connected to the lower die base, and an upper die punching assembly connected to the upper die base and located above the lower die punching assembly. The upper die punching assembly and the lower die punching assembly cooperate to separate the formed cover from the sheet material and form collapsed angles on the upper and lower edges of the cover. The lower die punching assembly includes a lower die punching die set connected to the lower die base, and a lower die pre-punching cutter head connected to the lower die punching die set and protruding from the lower die punching die set; the upper die punching assembly includes an upper die punching die set connected to the upper die base, and an upper die pre-punching cutter head connected to the upper die punching die set; the upper die pre-punching cutter head is provided with an upper die pre-punching blade edge; the lower die pre-punching cutter head cooperates with the upper die pre-punching blade edge to pre-punch the material plate and raise the entire cover body to a certain height, so that the upper surface periphery of the cover body forms a collapsed angle; The lower die punching assembly also includes a lower die blanking cutter head connected to the lower die punching die group, and the lower die blanking cutter head is provided with a lower die blanking cutting edge; the upper die punching assembly also includes an upper die blanking cutter head connected to the upper die punching die group, and the upper die blanking cutter head and the lower die blanking cutting edge cooperate to cut the formed cover body from the material plate and form a collapsed angle on the periphery of the lower surface of the cover body.

2. The punching and forming mechanism for a burr-free cover according to claim 1, characterized in that: The lower die punching assembly also includes a cover body positioning column connected to the lower die pre-punching head and protruding out of the lower die pre-punching head, and the cover body positioning column is used to position the convex cap of the cover body; the upper die pre-punching edge is provided with a cover body clearance hole for making way for the convex cap of the cover body, and the depth of the upper die pre-punching edge is less than the thickness of the cover body.

3. The punching and forming mechanism for a burr-free cover according to claim 1, characterized in that: The lower die punching die group is provided with a first buffering clearance groove between the lower die pre-punching cutter head and the lower die blanking cutter head; the upper die punching die group is provided with a second buffering clearance groove between the upper die pre-punching cutter head and the upper die blanking cutter head, and the first buffering clearance groove and the second buffering clearance groove are used to avoid the cover body.

4. The punching and forming mechanism for a burr-free cover according to claim 1, characterized in that: The lower die punching die assembly includes a lower supporting plate, a lower clamping plate and a lower pad fixedly connected from top to bottom. The lower pad is fixedly connected to the lower die base. The lower die pre-punching cutter head and the lower die blanking cutter head are both connected to the lower supporting plate and rest against the top of the lower clamping plate.

5. The punching and forming mechanism for a burr-free cover according to claim 1, characterized in that: The upper die punching die group includes multiple slide buckles, and an upper pad, a stop plate, an upper clamping plate and an upper support plate arranged in sequence from top to bottom, the upper and lower surfaces of the upper pad are fixedly connected to the upper die base and the stop plate respectively, the upper clamping plate and the upper support plate are fixedly connected, and a buffer space is provided between the stop plate and the upper clamping plate, and multiple slide buckles are fixedly distributed on both sides of the stop plate, and the two side surfaces of the upper support plate are provided with multiple sliding grooves that slide one by one with the buckle angles of the slide buckles, and the buckle angles of multiple slide buckles all rest on the bottom surface of the upper clamping plate; the upper die pre-punching tool head is connected in the upper support plate and rests on the bottom of the upper clamping plate, and the lower die blanking tool head is connected to the stop plate and rests on the bottom of the upper pad and passes through the upper clamping plate and the upper support plate.

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