Method for planning cutter feeding path and cutter retreating path in multi-axis linkage abrasive belt grinding machining

Abstract

The invention discloses a method for planning a cutter feeding path and a cutter retreating path in multi-axis linkage abrasive belt grind machining. The method comprises the steps that an initial cutter feeding path and an initial cutter retreating path are determined; an optimized cutter feeding path and an optimized cutter retreating path are determined, namely the path formed by the cutter contacts in the initial cutter feeding path from the position of the last cutter contact to the initial cutting position in sequence and then formed in the reversed direction serves as the optimized cutter feeding path, the path formed by the cutter contacts in the initial cutter retreating path from the position of the first cutter contact to the cutting finishing position along the following cutter contacts in sequence and then formed in the reversed direction serves as the optimized cutter retreating path; the cutter flying heights corresponding to the cutter contacts on the optimized cutter feeding path and the optimized cutter retreating path are determined; a cutter feeding track and a cutter retreating track can be determined in optimized abrasive belt grind machining according to the optimized cutter feeding path, the optimized cutter retreating path and the flying heights corresponding to the optimized cutter feeding path and the optimized cutter retreating path. According to the method, over cutting caused by long contact time of the initial contact and the end contact is effectively reduced and the grinding quality of the molded surface of a workpiece is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of numerical control grinding, and in particular relates to a planning method for advancing and retreating tool paths, which is suitable for polishing and grinding the profiles of aviation blades by a multi-axis linkage numerical control abrasive belt grinding machine tool. Background technique [0002] The surface of complex thin-walled parts such as blades is a free-form surface in space, with large curvature changes, and is prone to deformation after CNC milling, resulting in uneven distribution of grinding allowances. Grinding is usually used in the industry to ensure the uniformity of the machining allowance. However, with the continuous increase of blade size and volume, it is more and more difficult to use manual polishing, the efficiency is low, and the processing quality is difficult to guarantee-traditional manual polishing has gradually become a bottleneck restricting the rapid development of the ...

AI Technical Summary

Problems solved by technology

However, during the cutting process, the abrasive belt wheel stays at the initial cutting position of the tool path during the period from the time it touches the workpiece to the cutting depth. Under the same cutting conditions, the longer the contact time, the faster the cutting The larger the amount, the same is true for the retraction process, so that there will be overcut at the retraction and initial cutting position

Overcutting will affect the uniformity of the surface quality and margin, and cause damage to the streamline of the blade profile

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