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Free forging process of thin-wall special-shaped step cylinder piece

A free and crafty technology, applied in the direction of metal processing equipment, other household appliances, household appliances, etc., can solve the problems of complex shape, size, changeable specifications, and inability to meet the forging requirements of large-scale thin-walled special-shaped stepped tube parts, etc.

Inactive Publication Date: 2021-03-19
PANGANG GROUP JIANGYOU CHANGCHENG SPECIAL STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex shape and size of this kind of special-shaped forgings, and the changeable specifications (outer diameter range of 1000mm to 2000mm), the current domestic die forging equipment capacity cannot meet the forging requirements of large-scale thin-walled special-shaped stepped cylinders, and the mold production cost exceeds 10 million yuan

Method used

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  • Free forging process of thin-wall special-shaped step cylinder piece

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Experimental program
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Embodiment

[0033] Production of a CrXNiY steel grade (0Cr13Ni7Mo), the specifications are: total length 1640mm, large table size small table size The transition from the large platform to the small platform is smooth, and the length of the transition section is 940mm (specifically as figure 1 shown). The specific forging process is as follows:

[0034] The first step: out of the furnace, the whole ingot upsetting H≤1100mm, pulled out to Return to the furnace to keep warm for 1 to 5 hours;

[0035] The second step: out of the oven, pull out to grow Cutting: Return to the furnace to keep warm for 1~5h;

[0036] The third step: out of the furnace, upsetting H≤600mm Punch punching, control the thickness of the punch material ≤ 50mm, return to the furnace to cool down to 1200±10°C, and keep warm for 1-5h;

[0037] The fourth step: out of the oven, expand the inner hole as a whole Return to the furnace and keep warm for 1 to 3 hours;

[0038]The fifth step: out of the furnace,...

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Abstract

The invention provides a free forging process of a thin-wall special-shaped step cylinder piece. The process comprises the following steps of, A) heating a steel ingot according to the size, blankingin a drawing-out or upsetting and drawing-out mode, and upsetting and punching to obtain an initial forging stock; B) according to the size, carrying out mandrel drawing-out, mandrel mandrel broaching, upper and lower flat anvil mandrel-free outer diameter idling, lantern ring upsetting and surface finishing on the initial forging stock sequentially, and obtaining a finished forged piece; and C) carrying out heat treatment on the finished forged piece to obtain the thin-wall special-shaped step cylinder piece. In the process of preparing the thin-wall special-shaped step cylinder part, the technological key points such as a free forging deformation mode, billet heating number deformation requirements and effective use of special tools are strictly specified, the defect of insufficient equipment capacity can be overcome, conventional die forging is replaced with free forging, the high die manufacturing cost is saved, and meanwhile, the requirements of forge piece boundary dimension, flaw detection and performance indexes can be met.

Description

technical field [0001] The invention relates to the technical field of preparation of special-shaped parts, in particular to a free forging process of special-shaped stepped cylinder parts. Background technique [0002] The structural diagram of the thin-walled special-shaped stepped cylinder is as follows: figure 1 As shown, it is mostly used in military industry, and its external dimensions, flaw detection inspection standards and performance indicators are extremely strict, and there must be no defects such as black skin, cracks, pores, slag inclusions, trachoma, and looseness in each part. Due to the complex shape and size of this kind of special-shaped forgings, and the changeable specifications (outer diameter range of 1000mm to 2000mm), the current domestic die forging equipment capacity cannot meet the forging requirements of large-scale thin-walled special-shaped stepped cylinders, and the mold production cost exceeds 10 million yuan. [0003] The requirements for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00B21K21/04
CPCB21J5/002B21K21/04
Inventor 权榆凯黄博代永斌伍海滨文泽龙许金龙
Owner PANGANG GROUP JIANGYOU CHANGCHENG SPECIAL STEEL
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