Production method for forging small-specification hollow pipe through radial forging machine

Abstract

The invention belongs to the technical field of forging production, and relates to a production method for forging a small-specification hollow pipe through a radial forging machine. The method comprises the steps that dedicated hammer heads, for forging hollow parts, of the radial forging machine and a hollow core shaft meeting the requirements are designed, the dedicated hammer heads are divided into a hammer head set R and a hammer head set L, the feed angles of the hammer head set R are sequentially 9.59 degrees, 13.5 degrees and 10 degrees, and the feed angles of the hammer head set L are sequentially 10.94 degrees, 13 degrees and 8 degrees; and the manufacturing taper of the hollow core shaft is 1:700-1:900, a plating layer is arranged on the surface of the hollow core shaft, after polishing treatment, the depth of the plating layer ranges from 0.05 mm to 0.08 mm, the surface smoothness is not smaller than 1.6, the surface hardness meets HRC=(37-45)+ / -2, and the ratio of the average outer diameter to the wall thickness of the hollow core shaft ranges from 3.5 to 6.0. According to the aims, the defects that in the prior art, raw material losses are large, the steel ingot comprehensive utilization rate is low, the machining period is long, and cost is high are overcome; and according to the production method for forging the small-specification hollow pipe through the radial forging machine, the input of raw materials is reduced, the machining period is shortened, and forging penetration of the pipe wall is improved.

Description

Technical field [0001] The invention belongs to the technical field of forging production, and relates to a production method for forging a small-sized hollow tube by using a diameter forging machine. Background technique [0002] At present, the hollow pipe fittings produced in the forging industry are mainly divided into two categories. One is to forge hollow forging billets through hydraulic press upsetting, punching, reaming, and drawing, and the other is to forge the forging billets to be solid. The forgings are then finally processed into hollow forgings through machining processes such as bushing, boring or drilling, such as forgings such as DN80mm-DN350mm pipe molds, gun tubes, and corrugated rolls. The first type is mainly used in the forging of large-size hollow forgings. The main equipment for this forging is a hydraulic press; and the second type is mainly used in the forging of small-size hollow forgings with an inner hole of φ80~φ350mm and an outer diameter of φ150~...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of large raw material loss, low comprehensive utilization rate of steel ingots, long processing cycle and high cost in the prior art, and provide a method of reducing the input of raw materials, shortening the machining cycle and improving the forging of the pipe wall. Permeable production method for forging small-sized hollow tubes using a radial forging machine

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