Machining method of thin-wall large-circular-ring titanium alloy part

Abstract

The invention relates to a machining method of a thin-wall large-circular-ring titanium alloy part. The machining method comprises the following steps that 1, a special clamping tool and a special machining cutter are manufactured according to the boundary dimension of the thin-wall large-circular-ring titanium alloy part; 2, the special clamping tool is used for pre-pressing a part (7) to be machined; 3, the combined press-fitting to-be-machined part (7) obtained in the second step is subjected to stable press-fitting treatment, and the inner side of a pressing plate (6) abuts against the to-be-machined part (7) through a disc chuck (5); stress is eliminated through heat treatment; 4, a quick-change cutter handle is manufactured; and 5, all inner holes and outer circles of the to-be-machined part (7) are turned, and the thin-wall large-circular-ring titanium alloy part is obtained. According to the method, the size stability and the surface roughness can be improved, and the production cost can be reduced.

Description

technical field [0001] The invention belongs to the field of mechanical processing and relates to a processing method for a thin-walled large ring titanium alloy part. Background technique [0002] The mounting edge of a certain product belongs to the large ring part. This part is a key component of an aero-engine. It has a large batch size and is difficult to process. The quality of its processing seriously affects the performance parameters of the engine operation. The structure of the part is as figure 1 As shown, the part is a thin-walled large part with a wall thickness of only 1.5mm, and the ratio of the outer diameter of the thin-wall to the wall thickness is L / t>637 (L is the diameter of the outer circle, and t is the wall thickness). The material of the parts is titanium alloy TC4, which belongs to α+β phase titanium alloy, which has poor thermal conductivity and small elastic modulus. It is easy to generate large cutting heat and cutting force during machining, wh...

AI Technical Summary

Problems solved by technology

[0003] For the processing of thin-walled large ring parts, the traditional processing method is to use the ordinary clamping method. First, the inner hole is turned out, leaving a margin, then clamped, and then finished. The processing tool is also an ordinary tool. This processing method is used to process parts The deformation is large, and there is a difference of 0.1mm at the largest point, which causes the size to be out of tolerance. At the same time, parts vibration and tool vibration are prone to occur during the processing process, which seriously affects the surface accuracy of the parts and reduces the service life of the tool.

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