Unsymmetrical ring blank precise high-efficiency cold-extruding forming method

Abstract

The invention provides an unsymmetrical ring blank precise high-efficiency cold-extruding forming method, and belongs to the technical field of cold extrusion. The method comprises the steps of pipe-cutting blanking, surface phosphorus saponification treatment, ring cold-extruding forming and turning post-treatment, specifically, in the step of surface phosphorus saponification treatment, firstly, a shot blasting machine is used for conducting shot blasting pretreatment on the surface of a ring blank, and then the process steps of washing, phosphatizing, washing, saponifying and drying are sequentially completed; and in the step of ring cold-extruding forming, an automatic feeding machine is adopted to conduct feeding, and the ring blank is conveyed to a cold-extruding punch press to be subjected to cold extruding. According to the unsymmetrical ring blank precise high-efficiency cold-extruding forming method, the equipment invested cost is low, the technological process is short, and energy consumption is low.

Description

technical field [0001] The invention belongs to the technical field of cold extrusion, and relates to a processing method for a bearing ring, in particular to a precision and high-efficiency cold extrusion forming method for an asymmetric ring blank. Background technique [0002] Cold extrusion is a processing method in which the metal blank is placed in the cold extrusion die cavity, and at room temperature, the punch fixed on the press is applied to the blank to cause plastic deformation of the metal blank to produce parts. At present, my country has been able to cold-extrude metals such as lead, tin, aluminum, copper, zinc and their alloys, low-carbon steel, medium-carbon steel, tool steel, low-alloy steel and stainless steel, and even to bearing steel, high-carbon high- Aluminum alloy tool steel, high-speed steel, etc. can also be cold-extruded with a certain amount of deformation. In terms of extrusion equipment, my country already has the ability to design and manufact...

AI Technical Summary

Problems solved by technology

Friction brings considerable difficulty to forming, and the wear of the mold is also quite serious

[0004] Therefore, it is required to carry out certain chemical treatment on the surface of the workpiece to form a good lubricating layer, reduce friction and improve production efficiency; at present, the method of combining phosphate film and stearate lubricant is usually used, and the main process flow mainly includes : "degreasing→pickling→water washing→surface adjustment→phosphating→water washing→neutralization→saponification→drying" and other processes, there are many processes and long processing time. Both processes require the use of strong acid and strong alkali, which not only requires high investment in equipment, but also inevitably causes leakage of chemicals, causing environmental pollution; in addition, pickling and neutralization baths need to be kept at a certain temperature, and the process is relatively long , higher energy consumption

[0005] Ferrule blanks that have been treated with phosphorus saponification need to be loaded and unloaded manually. The operator puts the blanks to be extruded into the cold extrusion die of the hydraulic press for extrusion processing. The production mode of "one person, one machine" is adopted. The shift output is 3,000-4,000 pieces, the processing efficiency is low, and the degree of automation is not high. Moreover, once misoperation occurs, the feeding rhythm and stamping rhythm are inconsistent, which will cause personal injury to the operator and poor safety.

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