Machining method of thin-walled deep-hole welded workpieces

A processing method and technology of welding parts, applied in the field of mechanical processing, can solve problems such as deformation, and achieve the effect of mature technology and stable processing quality

Inactive Publication Date: 2014-11-19
SHAANXI QIYUAN TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above problems, the present invention provides a method that solves the problem that the joint action of internal stress and mechanical stress generated by welding causes deformation of parts during processing, and ensures the processing quality and various technical indicators of thin-walled deep-hole welded parts. The technology is mature. Processing method of thin-walled deep-hole welded parts with stable processing quality

Method used

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Embodiment Construction

[0020] The method for processing thin-walled deep-hole welded parts of the present invention includes the following steps:

[0021] In the first step, machining, complete the two ends, rough turning the outer circle, rough boring, and cut most of the margin; then finish turning the welding part, scribe and drill the hole for welding;

[0022] The second step is welding. Cold cracks are easy to occur after welding. Therefore, the hardening tendency of welded joints should be reduced during the welding process to prevent cracks. Due to the thinner wall of the parts, deformation will occur during welding production. Control the deformation to reduce the welding residual stress as much as possible under the minimum condition;

[0023] The third step is annealing, annealing at a higher temperature after welding to eliminate the stress caused by welding;

[0024] The fourth step is to rough and semi-finish the inner hole and outer circle on the basis of the inner hole and outer circle, ...

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PUM

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Abstract

The invention relates to the field of machining, in particular to a machining method of thin-walled deep-hole welded workpieces. The machining method includes the steps of performing machining; performing welding; performing annealing, to be specific, performing annealing at a high temperature after welding; performing rough machining and semi-finishing on a bore and outside by using the bore and the outside as mutual references, and performing cutting to obtain two workpieces; after cutting, performing heat treatment; performing finish boring on the bore with a floating borer, and with reserved allowance to be ground; performing ageing treatment; performing rough grinding on the bore; performing finish turning on the outside and an inner support edge, and machining an internal thread; performing finish grinding on the bore; performing other auxiliary steps; polishing the bore. By the use of the machining method, the problem that internal stress occurring during welding and machining stress co-act to deform a part during machining is solved; machining quality and various technical indexes of the thin-walled deep-hole welded workpieces are guaranteed; the technique is mature; machining quality is stable.

Description

Technical field [0001] The invention relates to the field of mechanical processing, in particular to a method for processing thin-walled deep-hole welded parts. technical background [0002] The processing of thin-walled deep-hole welded parts due to the combined effect of mechanical stress and internal stress generated by welding causes deformation of the parts during processing; in addition, due to insufficient rigidity of the thin-walled cylinder, deformation is prone to occur during clamping and processing. The inner hole of the part is at the welding position, and the two ports have irregular tolerances. The dimensional accuracy and shape tolerance cannot be guaranteed. [0003] In mechanical processing, deep holes are more difficult to process than general holes. The processing of thin-walled and welded barrels results in deformation of parts due to the internal stress generated by welding and mechanical stress; due to insufficient rigidity of the thin-walled barrel, the asse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00
CPCB23P15/00
Inventor 张淑芬
Owner SHAANXI QIYUAN TECH DEV
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