Machining Method of Large L/D Ratio and Weak Rigid Grinding Rod Grinding Circular End Face

Abstract

The invention discloses a processing method for grinding a circular ring end surface through a grinding rod with large slenderness ratio and weak rigidity. The processing of the circular ring end surface is divided into three steps of grinding a coaxial hole at the circular ring end surface of a bottom hole, removing the hole wall of the coaxial hole, and finish-machining the circular ring end surface of the bottom hole. In the coaxial hole processing process, the distance Z4 to Z3 between the hole bottom of the coaxial hole and the left end surface of a workpiece is measured through a probe and is differed from the nominal dimension L between the circular ring end surface of the bottom hole on a workpiece drawing and the left end surface of the workpiece; when L-Z4+Z3 is smaller than or equal to 30mum, the hole wall of the coaxial hole is removed, and finally the circular ring end surface of the bottom hole is finish-machined; and the distance between the circular ring end surface ofthe bottom hole and the left end surface of the workpiece is measured through the probe until meeting the tolerance requirement of the drawing dimension, so that grinding processing is accomplished. According to the method provided by the invention, the occurrence of the problem that according to a traditional workpiece self-rotating grinding processing method, the chattering unstability of the grinding rod caused by the functions of axial and radial grinding forces causes fast falling or local crushing of grinding wheel abrasives is avoided, the processing efficiency and the service life of agrinding wheel are improved, the rejection rate is reduced, and automation can be easily realized.

Description

technical field [0001] The invention belongs to the field of precision grinding of the end face of an inner hole circular ring, and relates to a processing method for grinding the end face of a circular ring with a large length-to-diameter ratio weak rigid grinding rod. Background technique [0002] Parts with large depth-to-diameter ratio are widely used in rocket engine cylinders, lifting equipment actuators, aircraft landing gear and other fields. The actuator is the core component of the aircraft landing gear, and its machining accuracy directly affects the performance and safety of the landing gear. The precision machining of the inner surface of the aircraft landing gear actuator includes inner holes, excessive arcs, bottom hole ring end faces, etc. , the end face of the bottom hole ring is one of the key dimensions of the actuator. It is necessary to strictly ensure the wall thickness, flatness and surface roughness of the end face of the bottom hole ring, so as to en...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of low processing efficiency, serious grinding wheel wear, poor system stability and prone to safety accidents mentioned above, the present invention researches and invents a processing method for grinding the end face of a circular ring with a large length-to-diameter ratio and a weak rigid grinding rod.

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