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Forging Forming Method of Irregular Cylinder

A cylinder and special-shaped technology, applied in the field of forging, can solve the problems of low utilization rate of parts material and time-consuming processing.

Active Publication Date: 2020-10-16
SHANGHAI ELECTRIC SHMP CASTING & FORGING CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, not only the material utilization rate of the parts is very low, but also the processing time is greatly consumed.
In addition, for a cylinder with a large diameter difference between the two inner stepped holes, the final shape cannot be completed by the commonly used common hole reaming forging method

Method used

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  • Forging Forming Method of Irregular Cylinder
  • Forging Forming Method of Irregular Cylinder
  • Forging Forming Method of Irregular Cylinder

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Embodiment Construction

[0029] In the present invention, through the cooperation of 12,000-ton free forging hydraulic press and related tooling, through multiple free forging processes, the large double vacuum steel ingot is finally forged into a stepped cylinder with a large step difference at the end of the inner hole. The special-shaped cylindrical body 10 of the present invention final shaping is as figure 1 As shown, it has a cylindrical barrel, and a stepped inner hole 20 is formed inside. The stepped inner hole 20 has a cylindrical first hole body 21 and a second hole body 22. The diameter of the first hole body 21 is Greater than the diameter of the second hole 22, there is an annular hole step surface 23 between the first hole 21 and the second hole 22, and the axial length of the second hole 22 is less than or equal to one-third of the length of the entire cylinder. One; the width of the annular hole body step surface 23 is greater than the width of one-fifth of the diameter of the first ho...

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Abstract

The invention provides a forging forming method of a special-shaped barrel body. The forging forming method of the special-shaped barrel body comprises the following steps that 1, a steel ingot is subjected to upsetting, drawing, cutting and casting, and a cylindrical blank is formed; 2, the cylindrical blank is subjected to upsetting and punching again; 3, a step-shaped inner hole is formed afterthe cylindrical blank with the hole is pulled out through a step-shaped core rod; 4, the step-shaped core rod is used for expanding the hole again; 5, the step-shaped core rod is used for expanding the hole again; 5, the step-shaped core rod and a sleeve are used for matching the blank section by section; and 6, the final forming of the special-shaped barrel body is completed. According to the forging forming method of the special-shaped barrel body, the forming of a large barrel forge piece with the large inner hole step difference can be effectively completed, and huge material and workingtime waste caused by machining of the straight barrel body can be avoided.

Description

technical field [0001] The invention relates to the field of forging, in particular to a forging forming method of a special-shaped cylinder. Background technique [0002] With the deepening of my country's industrialization process, my country's basic equipment is also constantly moving towards large-scale, integrated, high-quality, etc. It is also constantly upgraded, and the technical requirements for the products are getting higher and higher, and the shapes are becoming more and more complex, which correspondingly poses greater difficulties and challenges to equipment manufacturers. [0003] Cylinder forgings occupy a huge proportion in nuclear power, chemical industry and other industries. Although straight cylinder forgings occupy the vast majority of them, there are more and more special-shaped cylinders in the development process of related industries. For example, a stepped cylinder with a large step difference at the end of the inner hole. Since the ordinary form...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/00
Inventor 乔志洲
Owner SHANGHAI ELECTRIC SHMP CASTING & FORGING CO LTD
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