Forming technology of ultra-deep taper thin-wall part

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...

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