Combined type boring bar device driven by giant magnetostrictive material for servo

Abstract

The invention discloses a combined type boring bar device driven by giant magnetostrictive material for servo. One end of an elastic deformable body is connected with a main shaft, and the other end is connected with one end of a boring bar; a groove for a giant magnetostrictive material bar to be mounted in is formed in an outer cylindrical surface of the elastic deformable body in the axial direction; two magnetic conductive blocks are respectively embedded between two ends of the giant magnetostrictive material bar and between two side surfaces of the groove; a flexible hinge hole is formed in the bottom of the groove; a precompression adjusting screw is mounted on one side surface of the elastic deformable body close to one end of the boring bar; and an excitation mechanism is mounted outside the elastic deformable body with the giant magnetostrictive material bar, and is fixed on a machine tool. Through the adoption of the combined structure of the elastic deformable body and the boring bar, the giant magnetostrictive material bar extends under a magnetic field to force the front end of the elastic deformable body to rotate around a flexible hinge to drive the boring bar and a boring cutter to produce micro-feeding in the radial direction to meet the requirements for the size and the shape of a bored irregularly-shape hole. Through reasonable arrangement of structural parameters of the flexible hinge, the technical requirement of various micro-feeding strokes can be met.

Description

technical field [0001] The invention relates to a boring bar device, in particular to a combined giant magnetostrictive material driven servo boring bar device. Background technique [0002] For hole-like parts that are subject to large stress and uneven stress during work, such as engine cylinder holes and piston pin holes, in modern manufacturing, in order to reduce the stress concentration of such holes and reduce the fatigue of parts damage, prolonging its service life, such holes are specially processed into non-cylindrical holes (special-shaped holes), which requires that in precision boring processing, the boring tool must not only rotate at high speed along the machine tool spindle, but also along the The radial feed movement in the direction of the hole diameter can meet the needs of precision machining of different special-shaped holes, and the boring bar driven by giant magnetostrictive materials can meet the above requirements. The main features of existing bori...

AI Technical Summary

Problems solved by technology

However, this one-piece structure boring bar embedded with giant magnetostrictive materials has a contradiction between high mechanical strength and large radial displacement output, and cannot meet the precision machining requirements of large radial stroke output; at the same time, due to its one-piece structure, In actual application, there are problems of time-consuming and insufficient flexibility for quick replacement of boring bars

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