Hole helical milling device

Abstract

The invention provides a hole helical milling device, which comprises a frame, a main shaft system, a deviation regulating mechanism, a revolution system and an anti-winding mechanism. The main shaft system includes an electric main shaft and a milling cutter fixed to the free end of the electric main shaft, and the electric main shaft drives the miller cutter to rotate. The deviation regulating mechanism includes an inner cylinder and an outer cylinder, the inner cylinder surrounds the electric main shaft, the outer cylinder surrounds the inner cylinder, the inner circle and the outer circle of the outer cylinder are eccentrically arranged, and the inner circle and the outer circle of the inner cylinder are eccentrically arranged. The revolution system includes a driving motor, a pinion and a bull gear, the driving motor drives the pinion to drive the bull gear so as to realize revolution of the main shaft system, and an eccentric distance exists between the axial line of rotation of the milling cutter and the axial line of the revolution of the main shaft system. The device disclosed by the invention can be mounted on a mechanical arm, realizes accurate positioning of hole center and axial milling feeding by CNC (computer numerical control) during hole formation, is suitable for work occasions where a large number of series hole-diameter hole structures are rapidly manufactured.

Description

technical field [0001] The invention belongs to the technical field of milling, in particular to a helical hole milling device. Background technique [0002] With the mass production of regional aircraft and the development of large passenger aircraft, the integrated large-scale hole making of large-thickness composite material-titanium alloy composite structure has become an important factor restricting the improvement of production efficiency and quality of domestic aircraft manufacturing and assembly. The traditional drilling technology requires pre-drilling and preliminary processing, and then reaming or reaming. The generated burrs also need to be removed, and the hole-making efficiency is low. In addition, drilling is a continuous cutting process, and the local heat dissipation conditions are poor. When processing high-hardness materials such as titanium alloys, a large amount of cutting heat will be generated, which will aggravate tool wear, thereby affecting tool lif...

AI Technical Summary

Problems solved by technology

The traditional drilling technology requires pre-drilling and preliminary processing, and then reaming or reaming, the burrs generated also need to be removed, and the hole making efficiency is low

In addition, drilling is a continuous cutting process, and the local heat dissipation conditions are poor. When processing high-hardness materials such as titanium alloys, a large amount of cutting heat will be generated, which will aggravate tool wear, thereby affecting tool life and machining accuracy.

The above shortcomings make the traditional drilling technology unable to meet the hole-making requirements of modern aircraft manufacturing. It is urgent to adopt new hole-making technology to replace the traditional drilling technology, eliminate the stress concentration caused by hole-making defects, and realize low-stress, low-defect hole-making processing

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