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Sheet cold extruding forming method for wide-flange conical part

A cold extrusion and flange technology, applied in the field of extrusion forming, can solve problems such as low yield rate

Inactive Publication Date: 2014-08-06
JINXI IND GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a cold extrusion forming method to solve the problem of low yield rate when processing wide flange conical parts by traditional technology

Method used

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  • Sheet cold extruding forming method for wide-flange conical part
  • Sheet cold extruding forming method for wide-flange conical part

Examples

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Embodiment

[0019] Taking the processing of a wide flange conical product as an example, its structure is as follows figure 1 As shown, the specific size parameters are: t=5, D 凸 =250,R 1 =15,R 2 =25.

[0020] Adopt thin plate cold extrusion forming method of the present invention, concrete steps are as follows:

[0021] Step 1), determine trimming allowance; d 凸 =240,d 凸 / d=1.09, find out that δ=5.5, get d after correction 凸 =240+2×5.5=262.

[0022] Step 2), initial calculation blank diameter D; find out the formula D=(d 4 2 +4d 2 H-3.44rd 2 ) 1 / 2 . r=40, d 2 =170, d 4 =262, H=146, and D=380 after substitution.

[0023] Step 3), determine the drawing coefficient m during the first drawing 1 ; because d 凸 / d1 =0.59.

[0024] Step 4), determine the drawing coefficient and the number of times of drawing during the rest of the drawing, and calculate the diameter of each drawing; look up the table to obtain m 2 =0.88, m ,3 =0.88,m 4 =0.88, m 5 = 0.88. d 1 =1.07×0.59×38...

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Abstract

The invention relates to a sheet cold extruding forming method for a wide-flange conical part, and belongs to the field of extruding forming. The method includes the steps that a trimming allowance value is determined according to a trimming allowance determination table of a flange cylindrical drawing part; the value of the diameter of a blank is obtained according to a formula of the diameter of a rotary body drawing part blank; the drawing coefficient and drawing frequency during drawing are determined according to a drawing coefficient table; drawing heights are determined according to a drawing height computational formula, and drawing forming is achieved. By means of the method, the yield of the wide-flange conical part is improved.

Description

technical field [0001] The invention relates to a thin plate cold extrusion forming method of a wide flange conical part, which belongs to the field of extrusion forming. Background technique [0002] In the industrial field, some straw hat parts such as brake cylinders and end caps of the railway vehicle braking system are used as structural parts, and some are also used as supporting force-bearing parts. and often used as figure 1 Shown medium depth (h / d=0.3~0.7), wide flange (d 凸 / d)>1.4), α=50°~80°conical piece. These parts are complex in shape, and the traditional process is casting and secondary or tertiary cold extrusion. Casting process, the product has heavy weight, many sand holes, low yield rate, and the performance during use cannot meet the requirements of vehicle braking; secondary or tertiary cold extrusion forming, low yield rate. Taking the gradual forming of tapered parts as an example, the good product rate is only 55%. [0003] In addition, the te...

Claims

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Application Information

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IPC IPC(8): B21D22/26
Inventor 韩刚陈桂玲段建霞范国军王丽俊谭海兰程小晋张晓明郭为民
Owner JINXI IND GRP
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