Flanging-finishing composite die for brake bottom plate

Abstract

The utility model relates to the field of machining equipment, and particularly discloses a brake bottom plate flanging-finishing composite die which comprises a die upper structure and a die lower structure which are matched with each other. The die upper structure comprises a guide sleeve, an upper die plate, an upper base plate, an upper ejector ring, an upper side finishing insert, an upper fixing plate, an upper middle finishing insert, a discharging spring, an upper small finishing insert, an ejector sleeve and a flanging female die. The die lower structure comprises a guide column, an ejector pin, an ejector spring, a lower fixing plate, a middle finishing lower insert, a lower base plate, a lower die plate, a small finishing lower insert, a flanging male die and a lower discharging ring. The structural mode that the upper ejector ring and the lower ejector ring move is adopted, the movable die device and the static die device are arranged in the die, the traditional flanging process and the traditional finishing process are combined into one process, the production efficiency is effectively improved, and the defects that an existing traditional technology is large in number of machining processes, high in equipment and die input cost and the like are overcome.

Description

Technical Field

[0001] The utility model relates to the field of mechanical processing equipment, in particular to a brake bottom plate flanging-finishing composite die. Background Art

[0002] The brake base plate is a supporting part for fixing the brake shoe assembly and the brake drum in the wheel brake of the automobile. It is a key component in the brake assembly and is usually made by stamping steel plates. In terms of appearance and structure, the shape of the brake base plate is relatively complex. In addition to various boss recesses and various mounting holes on the mounting surface, there is also a circle of flanges around the outer periphery. In terms of assembly technology requirements, the bosses where the brake shoe is fixed have high flatness and parallelism requirements. Therefore, in the stamping process, after the workpiece has undergone flanging and other processes, it is also necessary to finish the bosses. In actual production, the flanging and finishing processes are generally processed on large and medium-sized hydraulic presses. If the traditional single process mode is adopted, the equipment investment and resource consumption are high, the overall production capacity is also restricted, and the development cost of multiple sets of molds is also not small, which ultimately leads to high overall product costs. This patent is based on the optimization of the production process in the prior art, and designs a brake base plate flanging-finishing composite mold, which combines the flanging and finishing processes into one sequence, improves production efficiency, and reduces investment costs. Utility Model Content

[0003] The utility model aims to solve the defects in the prior art and provide a brake bottom plate flanging-finishing composite die.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0005] A brake bottom plate flanging-finishing composite die, comprising a die upper structure and a die lower structure that cooperate with each other;

[0006] The upper structure of the mold includes a guide sleeve, an upper mold plate, an upper pad, an upper top ring, a side finishing upper insert, an upper fixing plate, an intermediate finishing upper insert, a discharge spring, a small finishing upper insert, a top sleeve and a flanging die;

[0007] The guide sleeves are installed in the corresponding guide sleeve holes on both sides of the upper template by interference fit, and the upper pad and the upper fixing plate are fixed to the bottom of the upper template;

[0008] The side finishing upper insert and the small finishing upper insert are respectively matched with clearances in the corresponding cavities of the upper fixing plate and fixed to the bottom of the upper pad;

[0009] The intermediate finishing upper insert is fixed to the bottom of the upper fixing plate, and the flanging die is fixed to the lower part of the upper pad;

[0010] The top sleeve passes through the upper pad and is connected to the upper top ring by bolts to form an upper unloading assembly. The upper end of the entire unloading assembly is compressed in the corresponding hole of the upper template by the unloading spring, and the lower end is kept in a gap between the flanging die and the upper fixed plate by the top sleeve.

[0011] The lower structure of the mold includes guide pillars, ejector pins, ejector springs, lower fixing plates, intermediate finishing lower inserts, lower pads, lower templates, small finishing lower inserts, flanging punches, and lower unloading rings;

[0012] The guide pins are installed in the fixing holes on both sides of the lower template by interference fit, and the lower fixing plate, the flanging punch and the lower pad are fixed to the upper part of the lower template by bolts and pins in sequence;

[0013] The ejector pin and ejector spring are installed in the corresponding spring holes of the lower pad and the lower template. The middle finishing lower insert and the small finishing lower insert are respectively placed in the corresponding cavities of the lower fixed plate. The lower unloading ring is sleeved on the outer ring of the flanging punch and placed on the upper part of the ejector pin.

[0014] Furthermore, each finishing block of the mold is designed as an insert structure, and the upper fixed plate is designed as a hollow shape. The shape of the hollow part and the shape of the insert maintain a clearance match to ensure that each insert can be freely placed to achieve rapid switching. If necessary, the height of each insert of the upper mold can be adjusted to ensure the parallelism between the bosses of the workpiece.

[0015] Furthermore, the lower fixed plate of the mold matches the upper fixed plate and is also designed to be a hollow shape. The shape of the hollow part maintains a clearance fit with the shape of the insert to ensure that each insert can be freely placed to achieve rapid switching. If necessary, the height of each insert of the lower mold can be adjusted to ensure the parallelism between the bosses of the workpiece.

[0016] Furthermore, the upper unloading assembly formed by the unloading spring, top sleeve and upper top ring in the mold ensures that the entire unloading assembly has a reasonable amount of compression. The top sleeve can move in the gap between the flanging die and the upper fixed plate, which plays a role in pressing the material while ensuring sufficient unloading force for smooth unloading.

[0017] Furthermore, each finishing insert in the mold is clearance-fitted with the cavity in the fixed plate. The upper finishing insert is fixed by bolts. If necessary, its height can be adjusted by adding a thin gasket inside the cavity to ensure flatness and parallelism; the lower finishing insert can be directly placed in the cavity of the lower fixed plate.

[0018] Furthermore, the flanging punch in the mold is designed to have a thin upper part and a thickened bottom structure to ensure that the structure has sufficient strength and rigidity and improve the overall life of the mold; the lower unloading ring structure is matched with the flanging punch, and its upper structure convexes inward to ensure a clearance fit with the upper part of the flanging punch to maintain smooth unloading.

[0019] The beneficial effects of the utility model are as follows: the application adopts a structural method in which the upper and lower top rings are movable, and a movable mold and a static mold device are divided in the mold, so that the traditional flanging and finishing processes are combined into one sequence, effectively improving the production efficiency, and solving many shortcomings of the existing traditional process, such as the large number of processing steps and the high investment cost of equipment and molds.

[0020] In this structural mode, the reasonable height difference setting of the workpieces at the flanging part and the finishing part realizes the action that the workpiece completes the flanging first and then reaches the boss finishing in the same mold, thereby ensuring that the product meets the technical requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is the front view of the mold structure of the utility model;

[0022] Figure 2 It is a top view of the lower mold of the mold of the utility model;

[0023] Figure 3a It is a structural schematic diagram of the upper fixing plate of the utility model;

[0024] Figure 3b Is a schematic cross-sectional view of the utility model on the fixed plate;

[0025] Figure 4a It is a structural schematic diagram of the lower fixing plate of the utility model;

[0026] Figure 4b It is a cross-sectional schematic diagram of the lower fixing plate of the utility model;

[0027] Figure 5a It is a schematic diagram of the structure of the workpiece of the utility model;

[0028] Figure 5b It is a cross-sectional schematic diagram of a workpiece of the utility model.

[0029] Explanation of reference numerals: 1. Guide sleeve 2. Upper template 3. Upper pad 4. Upper top ring 5. Side finishing upper insert 6. Upper fixed plate 7. Intermediate finishing upper insert 8. Unloading spring 9. Small finishing upper insert 10. Top sleeve 11. Flanging die 12. Guide column 13. Ejector pin 14. Ejector spring 15. Lower fixed plate 16. Intermediate finishing lower insert 17. Lower pad 18. Lower template 19. Small finishing lower insert 20. Flanging punch 21. Lower unloading ring. DETAILED DESCRIPTION

[0030] Reference Figures 1 to 4b , a brake bottom plate flanging-finishing composite die, comprising a die upper structure and a die lower structure that cooperate with each other;

[0031] The upper structure of the mold includes a guide sleeve 1, an upper mold plate 2, an upper pad 3, an upper top ring 4, a side finishing upper insert 5, an upper fixing plate 6, an intermediate finishing upper insert 7, a discharge spring 8, a small finishing upper insert 9, a top sleeve 10, and a flanging die 11;

[0032] The lower structure of the mold includes a guide column 12, an ejector pin 13, an ejector spring 14, a lower fixing plate 15, an intermediate finishing lower insert 16, a lower pad 17, a lower mold plate 18, a small finishing lower insert 19, a flanging punch 20, and a lower unloading ring 21;

[0033] The guide sleeve 1 is installed in the corresponding guide sleeve holes on both sides of the upper template 2 by interference fit. The upper pad 3 and the upper fixed plate 6 are fixed to the bottom of the upper template 2 by bolts and pins. The side finishing upper insert 5 and the small finishing upper insert 9 are respectively fitted with clearance in the corresponding cavity of the upper fixed plate 6, and are fixed to the bottom of the upper pad 3 by bolts. The middle finishing upper insert 7 is fixed to the bottom of the upper fixed plate 6 by bolts. The flanging die 11 is fixed to the lower part of the upper pad 3 by bolts and pins. The top sleeve 10 passes through the upper pad 3 and is connected to the upper top ring 4 by bolts to form an upper unloading assembly. The upper end of the entire unloading assembly is compressed in the corresponding hole of the upper template 2 by the unloading spring 8, and the lower end is kept in the gap between the flanging die 11 and the upper fixed plate 6 through the top sleeve 10.

[0034] The guide pins 12 are installed in the fixing holes on both sides of the lower template 18 by interference fit. The lower fixing plate 15, the flanging punch 20 and the lower pad 17 are fixed to the upper part of the lower template 18 by bolts and pins in sequence. The ejector pin 13 and the ejector spring 14 are installed in the corresponding spring holes of the lower pad 17 and the lower template 18. The intermediate finishing lower insert 16 and the small finishing lower insert 19 are respectively placed in the corresponding cavity of the lower fixing plate 15. The lower unloading ring 21 is sleeved on the outer ring of the flanging punch 20 and placed on the upper part of the ejector pin 13.

[0035] Furthermore, each finishing block of the mold is designed as an insert structure, and the upper fixed plate 6 is designed to be a hollow shape. The shape of the hollow part and the shape of the insert maintain a clearance fit to ensure that each insert can be freely placed to achieve rapid switching. If necessary, the height of each insert of the upper mold can be adjusted to ensure the parallelism between the bosses of the workpiece.

[0036] Furthermore, the lower fixed plate 15 of the mold matches the upper fixed plate 6 and is also designed to be a hollow shape. The shape of the hollow part maintains a clearance fit with the shape of the insert to ensure that each insert can be freely placed to achieve rapid switching. If necessary, the height of each insert of the lower mold can be adjusted to ensure the parallelism between the bosses of the workpiece.

[0037] Furthermore, the upper unloading assembly formed by the unloading spring 8, the top sleeve 10 and the upper top ring 4 in the mold ensures that the entire unloading assembly has a reasonable amount of compression. The top sleeve 10 can move in the gap between the flanging die 11 and the upper fixed plate 6, which plays a role in pressing the material while ensuring sufficient unloading force for smooth unloading.

[0038] Furthermore, each finishing insert in the mold is clearance-fitted with the cavity in the fixed plate. The upper finishing insert is fixed by bolts. If necessary, its height can be adjusted by adding a thin gasket inside the cavity to ensure flatness and parallelism; the lower finishing insert can be directly placed in the cavity of the lower fixed plate.

[0039] Furthermore, the flanging punch 20 in the mold is designed to be thin at the top and thick at the bottom, ensuring that the structure has sufficient strength and rigidity, thereby increasing the overall life of the mold. The lower discharge ring 21 is structurally matched with the flanging punch, and its upper structure is convex inward, ensuring a clearance fit with the upper part of the flanging punch, thereby maintaining smooth discharge.

[0040] The working principle of the utility model is briefly described as follows:

[0041] The brake bottom plate of this type of Jiangling pickup truck is made of cold-rolled plate through stamping, and is used for flanging-finishing processing after forming, punching, trimming and other processes:

[0042] The first step is to install the brake bottom plate flanging-finishing mold of the utility model on a 500T hydraulic press.

[0043] In the second step, the semi-finished brake base plate that needs flanging and finishing is placed into the lower die of the mold, and positioned in the positioning cavity of the lower die through the shape of the workpiece boss recess and the like.

[0044] The third step is to start the hydraulic press, and the upper template 2 moves downward with the worktable on the machine. The upper top ring 4 first presses the workpiece with the flanging punch 20 under the compression reaction force of the discharge spring 8, and then the flanging die 11 moves downward. The lower discharge ring 21 presses the blank with the flanging die 11 under the compression reaction force of the top material spring 14, and the flanging punch 20 cooperates with the flanging die 11 to complete the flanging process of the outer edge. The upper die continues to move downward with the machine until the finishing upper insert and the finishing lower insert are pressed into place to compact the workpiece. While completing the outer edge flanging of the workpiece, the finishing process of each part is also completed.

[0045] In the fourth step, after the workpiece is flanging and finishing, the upper slide of the press drives the upper part of the mold to return to its original position, and the lower ejector ring 21 lifts the workpiece under the elastic force of the ejector spring 14, and the upper unloading ring 4 ejects the workpiece from the flanging die under the force of the unloading spring 8. The structure of the workpiece is shown in FIG. Figure 5a and Figure 5b .

[0046] The fifth step is to take the workpiece out of the mold cavity and proceed to make the next workpiece.

[0047] After using this brake base plate flanging-finishing composite mold, the traditional flanging and finishing processes are combined into one sequence. During the entire operation process, the hydraulic press stroke is limited by the finishing upper insert and the finishing lower insert to compact the workpiece, ensuring the flatness and parallelism of the corresponding parts of the workpiece, effectively improving production efficiency, and solving the problems of the existing traditional process with multiple processing steps and high equipment and mold investment costs.

[0048] In this structural mode, the reasonable height difference setting of the workpieces at the flanging part and the finishing part realizes the action that the workpiece completes the flanging first and then reaches the boss finishing in the same mold, thereby ensuring that the product meets the technical requirements.

[0049] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A brake bottom plate flanging-finishing composite die, characterized in that: It includes a mold upper structure and a mold lower structure that cooperate with each other; The upper structure of the mold includes a guide sleeve, an upper mold plate, an upper pad, an upper top ring, a side finishing upper insert, an upper fixing plate, an intermediate finishing upper insert, a discharge spring, a small finishing upper insert, a top sleeve and a flanging die; The guide sleeves are installed in the corresponding guide sleeve holes on both sides of the upper template by interference fit, and the upper pad and the upper fixing plate are fixed to the bottom of the upper template; The side finishing upper insert and the small finishing upper insert are respectively clearance-matched in the corresponding cavities of the upper fixing plate and fixed to the bottom of the upper pad; The intermediate finishing upper insert is fixed to the bottom of the upper fixed plate, and the flanging die is fixed to the lower part of the upper pad; The top sleeve passes through the upper pad and is connected to the upper top ring by bolts to form an upper unloading assembly. The upper end of the entire unloading assembly is compressed in the corresponding hole of the upper template by the unloading spring, and the lower end is kept in the gap between the flanging die and the upper fixed plate by the top sleeve. The lower structure of the mold includes a guide column, an ejector pin, an ejector spring, a lower fixing plate, an intermediate finishing lower insert, a lower pad, a lower template, a small finishing lower insert, a flanging punch, and a lower unloading ring; The guide pillars are installed in the fixing holes on both sides of the lower template by interference fit, and the lower fixing plate, the flanging punch and the lower pad are fixed to the upper part of the lower template by bolts and pins in sequence; The ejector pin and ejector spring are installed in the spring holes corresponding to the lower pad and the lower template, the intermediate finishing lower insert and the small finishing lower insert are respectively placed in the corresponding cavities of the lower fixed plate, and the lower unloading ring is sleeved on the outer ring of the flanging punch and placed on the upper part of the ejector pin.

2. A brake bottom plate flanging-finishing composite die according to claim 1, characterized in that: Each finishing block of the mold is designed as an insert structure, and the upper fixing plate is designed as a hollow shape, and the shape of the hollow part and the shape of the insert are matched with each other in a clearance.

3. A brake bottom plate flanging-finishing composite die according to claim 1, characterized in that: The lower fixing plate matches the upper fixing plate, and the lower fixing plate is designed to be a hollow shape, and the shape of the hollow part and the shape of the insert are matched with each other in a clearance.

4. A brake bottom plate flanging-finishing composite die according to claim 1, characterized in that: The unloading spring, the top sleeve and the upper top ring form an upper unloading assembly, and the upper unloading assembly is guaranteed to have a reasonable compression amount, and the top sleeve can move in a gap between the flanging die and the upper fixed plate.

5. The brake bottom plate flanging-finishing composite die according to claim 1, characterized in that: The flanged convex mold in the mold is designed to have a structure with a thin upper portion and a thickened bottom; The lower discharge ring is matched with the flanging punch, and the upper structure of the lower discharge ring is convex inwardly and has a clearance fit with the upper part of the flanging punch.

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