Machining method for large cast titanium alloy diamond-shaped cabin shell

Abstract

The invention discloses a machining method for a large cast titanium alloy diamond-shaped cabin shell and belongs to the machining method for a complex piece. The machining method for the large cast titanium alloy diamond-shaped cabin shell includes the following steps: step 1, machining a base and measuring; step 2, carrying out three-dimensional scanning on a blank and detecting; step 3, carrying out self-adaption machining on a rough base; step 4, roughly machining the shape; step 5, detecting the size and performing three-dimensional scanning; step 6, performing heat treatment; step 7, performing three-dimensional scanning and detecting; step 8, finishing the base; step 9, finishing the shape; step 10, detecting the shell. The machining method for the large cast titanium alloy diamond-shaped cabin shell is capable of comprehensively analyzing the cast size precision and allowance, quickly determining the machining base, controlling the wall thickness uniformity and guaranteeing the shell quality, has small machining deformation, and enables the manufacturing cycle to be shortened.

Description

technical field [0001] The invention relates to a machining method for complex structural parts, in particular to a machining method for a large-scale cast titanium alloy diamond cabin shell. Background technique [0002] In the 1960s, countries around the world began to study and apply titanium alloy precision casting technology. After decades of research and application, it has been proved that titanium alloy castings are safe and reliable as aviation and aerospace components, and their performance and reliability are comparable to plastic deformation components. , and some are close to forgings, and the manufacturing cost and production cycle are significantly better than plastic deformation components. Moreover, the overall casting eliminates mechanical connections, reduces the number of components, reduces the weight of structural parts, and improves the integrity of the structure. [0003] With the upgrading of my country's aerospace products, the requirements for the...

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Problems solved by technology

[0005] (1) The outer dimensions of the shell are large, the grid structure, the wall is thin, and the rigidity is weak;

[0006] (2) There are many coordination relationships between cabin shell dimensions;

[0007] (3) There is deformation and shrinkage in shell casting, and the profile, wall thickness uniformity, and machining allowance after casting are quite different from the theoretical state;

[0008] (4) There are defects in the casting, and repair welding is used;

[0010] (6) Uneven processing allowance

[0020] Existing processing methods cannot comprehensively detect casting dimensions, resulting in ineffective evaluation of casting quality and casting allowance; inability to accurately realize benchmark coordination under full-size constraints, resulting in difficulty in determining product processing benchmarks; difficult to control wall thickness uniformity, and weak product rigidity , easily deformed during processing

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