Forming process of large-diameter piston plug, step shaft or oil cylinder and processing equipment thereof

Abstract

The invention discloses a forming process of a large-diameter piston plug, a step shaft or an oil cylinder and processing equipment thereof. The forming process comprises the following steps of adopting gradient pretreatment, split die preparation, die applying, heat extrusion and die opening, applying horizontal heat extrusion on a to-be-processed workpiece in the premise of radial load, and completing the heat extrusion heading process of the to-be-processed workpiece. The forming process and the processing equipment have the advantages that the deformation of the workpiece is sufficient and accurate, one part of a transition area has the complete metal flow line, and the processing quality is stable and reliable; meanwhile, the layout of a horizontal loading hydraulic machine and a vertical loading hydraulic machine which are supported by a gantry framework is reasonable, the structure is stable, the convenience in use is realized, and the flat-pushing heat extrusion process under the condition of large load is effectively ensured; and the forming process and the processing equipment are particularly suitable for the heat extrusion heading of the large-diameter piston plug, the step shaft or the oil cylinder.

Description

technical field [0001] The invention relates to a metal forging process and equipment, in particular to a process and equipment for forming a large-diameter piston plug, stepped shaft or oil cylinder by using a flat forging hydraulic press, and belongs to the field of metal forging processing. Background technique [0002] At present, in petroleum machinery, coal mining machinery, auto parts and other industries, the diameter range of hot extrusion upset piston plug or stepped shaft is between ￠20~￠60mm, and the length is between 20~100mm. If the diameter of the plug head or the step shaft exceeds this range, the hot extrusion process often has a large piston head and a small tail, the back of the piston forms an inverted cone, and the unilateral margin is > 10mm. The existing process cannot guarantee the processing quality. Therefore, the large-diameter piston plug or stepped shaft is usually processed by welding or machining in the prior art. [0003] In the existing w...

AI Technical Summary

Problems solved by technology

Not only the loss of raw materials is serious, the cost remains high, but also the processing technology is complicated and the production efficiency is low

[0004] Since the welding process and machining process are limited by their own processing conditions, relying on process improvement can no longer meet the processing needs of large-diameter piston plugs or stepped shafts

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