Gun drill for deep hole machining based on piezoelectric ceramic materials for deviation rectification and deviation rectification method

Abstract

The invention is applied to the field of machining of deep holes of medium and small diameters (below), and particularly relates to a gun drill for deep hole machining based on piezoelectric ceramic materials for deviation measurement and correction and a corresponding deviation measurement and correction method. The piezoelectric gun drill comprises a piezoelectric drill bit and a piezoelectric drill rod. Two long-strip-shaped tile-shaped piezoelectric ceramics are installed at the front end of the piezoelectric drill rod at a circumferential angle difference of 90 degrees, the tile-shaped piezoelectric ceramics are used for detecting voltage changes caused by axial stress generated when the drill rod is bent due to axis deflection so as to judge the direction and the size of axis deflection. An arc-shaped solid body is welded to the piezoelectric drill bit, three cylindrical grooves are machined in the circumferential direction, cylindrical piezoelectric ceramics are installed in thethree cylindrical grooves, hard alloy protective layers adhere to the upper surfaces of the cylindrical piezoelectric ceramics and are in interference fit with hole walls, and the cylindrical piezoelectric ceramics deform in the radial direction by applying an external voltage signal and extrude the machined hole walls to push back the deflected drill bit to the correct position. Through dynamiccombination of online deviation measurement and real-time deviation correction, the straightness of the deep holes of medium and small diameters is improved.

Description

technical field [0001] The invention belongs to the field of deep hole processing, and in particular relates to a gun drill for deep hole processing based on piezoelectric ceramic material deviation correction and a deviation correction method. Background technique [0002] Deep hole processing technology originated in the manufacturing process of guns and barrels, and metal tubular firearms became the earliest deep hole parts. Before the end of World War II, the development and application of deep hole processing technology has been limited to the relatively closed field of military industry, and it is famous in the machinery manufacturing industry for its high difficulty, high cost and mystery. With the development of science and technology, deep hole processing technology has been widely used in aerospace, energy mining, automobile manufacturing, petrochemical, metallurgy, instrumentation, national defense equipment manufacturing and other industrial fields. Large size a...

AI Technical Summary

Problems solved by technology

[0005] If the above schemes use hydraulic real-time qualitative deviation correction, most of them are suitable for large diameter deep holes ( Above) processing, using internal chip removal tools with larger diameters such as BTA staggered tooth drills, it is difficult to apply in small and medium diameter deep hole processing

Some other schemes, such as ultrasonic thickness measurement, laser positioning and other schemes, are cumbersome in composition and difficult to implement

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