Machining method for thin-wall long pipe casting

Abstract

The invention belongs to the technical field of machining, and particularly relates to a machining method for a thin-wall long pipe casting. The machining method comprises the following steps: step 1) installing tips, wherein a fixed tip is installed in a chuck of a machine tool, and a movable tip is installed in a conical hole of a main shaft of the machine tool; step 2) clamping and fixing the pipe casting, wherein the movable tip and the fixed tip extend into the pipe casting along pipe openings in the two ends of the pipe casting correspondingly, and the movable tip and the fixed tip respectively abut against a port of an inner hole in the middle section of the pipe casting to meet the requirement for clamping and fixing the pipe casting; step 3) respectively machining the outer circle of the long section and the outer circle of the short section of the pipe casting to meet the process requirement; step 4) respectively machining the inner hole of the long section and the inner hole of the short section of the pipe casting to meet the process requirement; step 5) respectively machining a first outer circular groove between the long section and the middle section of the pipe casting and a second outer circular groove between the short section and the middle section of the pipe casting to meet the process requirement; and step 6) respectively machining a step surface and a step hole of the middle section of the pipe casting to meet the process requirement. The machining method solves the problems that the outer circle of the long section and the outer circle of the short section of a conventional casting are machined, the two tips are adopted to abut against the port of the long section and the port of the short section correspondingly, the middle section is greatly deformed, and milling penetration is prone to occurring during machining of the middle section.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a processing method for thin-walled long tube castings. Background technique [0002] The thin-walled long tube castings of aviation equipment are high-precision machining parts, including long section, middle section and short section, of which the long section and short section are used for clamping and fixing parts in machining, and the middle section is the part to be precision processed. By clamping the long section and the short section, it can effectively avoid the impact of the clamping on the accuracy of the middle section. Conventionally, the outer circle of the long section and the short section is processed first to improve the installation accuracy of the clamping part during subsequent middle section processing. The usual method is to use two tops to face the port of the long section and the port of the short section respectively to clamp a...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is: for the processing of castings, two tops are respectively used to face the port of the long section and the port of the short section of the top, and the middle section will have a large deformation, which will easily lead to the problem of milling when the middle section is machined. A processing method for thin-walled long tube castings is provided

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