Machining method of machine seat assembly in moment gyroscope for spaceflight

Abstract

The invention discloses a processing method for a frame assembly in a torque gyroscope used in aerospace. The method includes heat treatment after blanking, rough milling of the shape, rough grinding of the flatness of eight platforms on the upper and lower end surfaces, horizontal milling, and quenching treatment , Stress release, testing, finished product grinding, etc. The method can avoid the lack of dimensional accuracy due to the direct processing of the quenched steel by the machine tool, and at the same time ensure the coaxiality and cylindricity of the holes at both ends, thereby reducing the processing cost and improving the qualified rate of finished products.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a processing method for a frame assembly in a moment gyroscope used in aerospace. Background technique [0002] When processing the aluminum alloy and steel sleeve assemblies specially used in the aerospace field, the aluminum alloy parts are in the 2A14H112 state and the material is transformed into a 2A14T6 state after heat treatment, and the steel sleeve is made of 9Cr18 material and quenched to a hardness of HRC48~53. After heating the aluminum alloy parts, insert the steel sleeve) and fasten them with screws; the flatness of the upper and lower eight places is required to be 0.003, the coplanarity of the four places is 0.008, the parallelism of the upper and lower eight places is 0.008, and the diameter of the holes at both ends is The cylindricity is 0.003, the coaxiality of the holes at both ends relative to the common axis is 0.003, the coaxiality of the en...

AI Technical Summary

Problems solved by technology

[0002] When processing the aluminum alloy and steel sleeve assemblies specially used in the aerospace field, the aluminum alloy parts are in the 2A14H112 state and the material is transformed into a 2A14T6 state after heat treatment, and the steel sleeve is made of 9Cr18 material and quenched to a hardness of HRC48~53. After heating the aluminum alloy parts, insert the steel sleeve) and fasten them with screws; the flatness of the upper and lower eight places is required to be 0.003, the coplanarity of the four places is 0.008, the parallelism of the upper and lower eight places is 0.008, and the diameter of the holes at both ends is The cylindricity is 0.003, the coaxiality of the holes at both ends relative to the common axis is 0.003, the coaxiality of the end of the steel sleeve relative to the reference B is 0.03, and the coaxiality of the reference B relative to the steel sleeve hole is 0.03. It is a typical high-precision part; because the workpiece is large, the main workpiece part is made of aluminum alloy, and the overall length reaches 440mm. It is easy to deform during processing and requires high precision dimensions, so the processing is difficult and the product quality is not easy to guarantee.

[0003] The general processing method of this type of workpiece is: after assembly, the diameter accuracy, coaxiality and cylindricity of the holes at both ends are guaranteed with the precision of the machine tool, and the planes of the left and right ends are processed in the same process to ensure the verticality requirements of the drawing, and the upper and lower sides are finely milled. There are eight platforms on the end face to ensure the flatness requirements; in the process of processing, it is difficult to guarantee the dimensional accuracy, cylindricity and end face flatness of the workpiece at the end of the steel sleeve after quenching, and because the general processing method guarantees the coaxiality is to combine the two The end holes are processed at the same time, but due to the large interval between the holes at both ends and the long boring bar, it is easy to cause tool vibration, and it is difficult to guarantee the coaxiality after processing; Because the materials of the holes at both ends are different, the end holes of aluminum parts are easy to reach the size, while the size of the end holes of steel parts is difficult to guarantee. After processing, the workpiece will become defective or scrap, which will increase the consumption of raw materials and increase the cost of the product. The qualification rate of the product has dropped significantly