Hole-making device for adjusting hole diameter on-line

Abstract

The invention discloses a hole forming device capable of adjusting the aperture of a formed hole on line. The hole forming device comprises an eccentric hole-forming machine head component, an eccentric head feeding platform component, an aperture adjusting driving component, a main shaft cable winding-preventing component and a pressing foot component. According to the hole forming device, an inner eccentric sleeve and an outer eccentric sleeve are used for achieving high-speed self rotating of a tool and revolution of the tool around a changeable center in a hole forming process, and then compound motion needed by tool eccentric hole forming is provided. The self-rotating speed of the tool is achieved by the fact that an outer frequency changer controls the frequency of an electric main shaft. Aperture adjusting, tool revolution speed and tool axial feeding speed can be accurately controlled by programs through servo control motors. The hole forming device can achieve on-line formed hole aperture adjusting, hole forming efficiency is improved, meanwhile, machining of taper hole can be achieved, the problem of cable winding during main shaft high-speed rotating is avoided through a main shaft cable winding-preventing mechanism, and the stability and the safety of the whole hole forming device are improved.

Description

technical field

[0001] The invention relates to an automatic hole-making technology for digital assembly, in particular to a hole-making device for adjusting the diameter of the hole on-line. Background technique

[0002] With the rapid development of the aviation industry, in order to effectively improve the structural strength of the aircraft, reduce the weight of the aircraft structure, and reduce the energy consumption of the aircraft, a large number of laminated structures composed of aluminum alloys, titanium alloys, and carbon fiber composite materials are used on aircraft. At present, my country's aircraft assembly manufacturing industry basically still generally adopts the traditional manual hole-making process, that is, ordinary electric drills (or air drills) and carbide tools are used to make holes. There are many defects in this existing hole-making method: (1) A tool can only make holes with one diameter, and for different processing hole diameters, it is neces...

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