Machining method of titanium alloy thin-wall part

Abstract

The invention discloses a machining method of a titanium alloy thin-wall part. The machining method of the titanium alloy thin-wall part comprises the following steps that a holding body holds the small end of a thin-wall shaft sleeve, the inner wall of the thin-wall shaft sleeve is subjected to rough machining operation through a lathe, and the thin-wall shaft sleeve which is subjected to rough machining operation is subjected to heat treatment; semi-finish machining operation and finish machining operation are conducted, and an inner conical hole is obtained through a boring tool; the innerconical hole serves as the standard, and a mandrel is embedded into the inner conical hole; a lathe chuck clamps the large end of the mandrel, internal threads at the tail end of the thin-wall shaft sleeve are connected with external threads of a technological plug head, and a bolt passes through an inner cavity formed in the technological plug head and is connected with the mandrel in a threadedmode; tool withdrawal grooves of excircles of the thin-wall shaft sleeve are subjected to finish machining operation, and then the thin-wall shaft sleeve is separated from the mandrel; the lathe chuckclamps the large end of the mandrel, the internal threads at the tail end of the thin-wall shaft sleeve are connected with the external threads of the technological plug head, and the bolt passes through the inner cavity formed in the technological plug head and is connected with the mandrel in a threaded mode; and the excircles of the thin-wall shaft sleeve are subjected to finish turning operation and finish machining operation. By the adoption of the machining method of the titanium alloy thin-wall part, the dimensional stability and the surface roughness are improved.

Description

technical field [0001] The invention belongs to the field of mechanical processing, and in particular relates to a processing method for titanium alloy thin-walled parts. Background technique [0002] Titanium alloy materials have low elastic modulus, small deformation coefficient, and poor thermal conductivity, which lead to poor cutting performance. Especially when thin-walled parts are processed with inner holes and outer circles, it is difficult for the tool to be fully cooled, resulting in thin-walled parts. The deformation of the parts is large, and the thin-walled bushing is the most critical part in the machining of the entire transmission mechanism. The quality of its processing seriously affects the performance parameters of the entire transmission mechanism experiment. The surface roughness of the inner hole and the outer circle of the previously processed thin-walled bushing parts is poor. The general processing method is to drill the basic hole first, and then p...

AI Technical Summary

Problems solved by technology

[0002] Titanium alloy materials have low elastic modulus, small deformation coefficient, and poor thermal conductivity, which lead to poor cutting performance. Especially when thin-walled parts are processed with inner holes and outer circles, it is difficult for the tool to be fully cooled, resulting in thin-walled parts. The deformation of the parts is large, and the thin-walled shaft sleeve is the most critical part in the machining of the entire transmission mechanism. The quality of its processing seriously affects the performance parameters of the entire transmission mechanism experiment.

The surface roughness of the inner hole and the outer circle of the previously processed thin-walled bushing parts is poor. The general processing method is to drill the basic hole first, and then process it with ordinary turning tools. It is difficult to achieve a surface roughness below 0.8. The size and shape tolerance of the outer circle is out of tolerance, resulting in the matching contact surface between the tapered surface of the inner hole and the outer tapered surface of the shaft not reaching more than 75% of the required

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