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Forming technology of ultra-deep taper thin-wall part

A forming process and technology of thin-walled parts, which are applied in the field of deep drawing of thin-plate and ultra-deep conical parts, can solve the problems of material cracking and uneven wall thickness, and achieve the effect of high production efficiency

Inactive Publication Date: 2010-06-16
CHANGAN AUTOMOBILE (GRP) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a forming and processing method for ultra-deep conical thin-walled parts to solve the problems of uneven wall thickness and material cracking in the forming of ultra-deep conical thin-walled parts

Method used

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  • Forming technology of ultra-deep taper thin-wall part
  • Forming technology of ultra-deep taper thin-wall part
  • Forming technology of ultra-deep taper thin-wall part

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Embodiment Construction

[0020] The following combination Figure 1-Figure 8 Describe the process:

[0021] 1. Blanking and punching bowl. Coat the surface of 10 steel strips with thickness t=0.7mm with lubricating oil (trichlorethylene C12=CHC1 diluent and SH150 molding oil at a ratio of 1:5) and put it into the blanking die with blank holder , punched with a 400kN open punching machine, blanking size D = Ф88mm, the workpiece after punching is a cylindrical piece with a bottom, its inner diameter d = Ф45mm, height h = 34mm, bottom fillet r = 6mm, workpiece thickness t=0.7mm.

[0022] 2. Thinning and deep drawing. Put the workpiece after blanking and punching into the thinning and drawing die, and punch it with a 400kN open punching machine. After thinning and drawing, the hole diameter d1=Ф35.5mm is the same as the inner diameter of the large end of the tapered hole of the finished product, and the cylinder wall is formed by t= 0.7mm is thinned to t′=0.55mm, which is equal to the finished wall th...

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Abstract

The invention provides a forming technology of an ultra-deep taper thin-wall part, comprising the following technological steps of: cupping blanks; attenuating and deeply drawing; cutting; continuously tapering for three times; anaerobically annealing; and continuously tapering to finally obtain the products with the specified shapes, sizes, and the like. The forming technology is characterized by solving the problem of difficult forming of the ultra-deep taper thin-wall part by firstly forming a large-end taper hole and gradually contracting a small-end cylindrical aperture through tapering and combining with anaerobic annealing processing and effectively solving the problem of non-uniform wall thickness of the integral ultra-deep taper thin-wall part due to the partial attenuation of a bottom long filleted corner of a workpiece in the tapering process of the taper thin-wall parts. The invention can complete the forming processing of the ultra-deep taper thin-wall part on a mechanical punching machine, has the production efficiency far higher that that of a common hydraulic press (the production takt time of the mechanical punching machine is more than 25 times per minute, and the production takt time of the common hydraulic press is 2-3 times per minute) and is suitable for match production.

Description

technical field [0001] The invention relates to a stamping forming process, in particular to deep drawing forming of an ultra-deep conical part of a thin plate made of low carbon steel. Background technique [0002] In the stamping design data, the relative height greater than 0.8 (the height of the tapered part ÷ the diameter of the large end of the tapered part) is called a deep tapered part. Due to the large degree of deformation of this kind of parts, the pressure of the punch is only transmitted to the deformation zone through a small area in the middle of the blank, resulting in a large local thinning, and sometimes even the material is cracked, so it needs to be drawn multiple times. The wall thickness of the molded product is uneven, and there are obvious impressions on the tapered surface. For ultra-deep conical thin-walled parts with a relative height of more than 2 and a plate thickness of less than 1mm, the degree of stamping deformation is greater, the local th...

Claims

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Application Information

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IPC IPC(8): B21D51/10B21D22/02B21D22/28
Inventor 谷成渝周志明
Owner CHANGAN AUTOMOBILE (GRP) CO LTD
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