Fine milling cutting force simulation predicting method considering tool runout influence

Abstract

The invention discloses a fine milling cutting force simulation predicting method considering the tool runout influence. Aiming at micro-milling cutter cutting edge trochoid motion track calculation, on the basis of a tool coordinate system and a machining process geometric model, tool axis radial deviation and tool axis inclination are fully considered, and theoretical instant non-deformation chip thickness models are established for cutting edges at different positions based on an actual tool trochoid motion track; and cutting force prediction models are established in a shear effect leading cutting region and a plough effect leading cutting region separately based on a micro-milling cutter side edge shear effect, a micro-milling cutter side edge plough effect and a micro-milling cutter bottom cutting effect. The influences of tool runout, a cutting edge size effect and a bottom edge cutting effect are fully considered, and strong support is provided for reasonable optimization of cutting machining parameters while the cutting force prediction precision in the fine milling process is improved.

Description

technical field [0001] The invention belongs to the technical field of micro-milling manufacturing simulation technology, and in particular relates to a micro-milling cutting force simulation prediction method considering the impact of tool jump. Background technique [0002] With the continuous development of my country's aerospace, biomedical, national defense technology, emerging electronic technology, energy and environmental protection and other fields, there is an increasingly urgent demand for micro-milling of precision key parts that play a leading role and are characterized by complex structures and small scales. [0003] The simulation prediction of cutting force in the process of micro-milling is the premise and basis for the reasonable optimization of process parameters. For enterprises, the simulation of cutting force in micro-milling can reduce the test cost and shorten the development time of new products. Therefore, micro-milling The research on the simulatio...

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Problems solved by technology

The influence of the cutting edge motion trajectory on the instantaneous undeformed chip thickness is the key issue in establishing a cutting force theoretical prediction model; at present, the research content related to the chip thickness model mainly focuses on the axial offset runout of the micro-milling cutter, ignoring the tool axis tilt The influence of runout and the dynamic change of the cutting angle and cutting-out angle of the micro-milling cutter on the trochoidal motion trajectory of the cutting edge; and, the existing research is limited to the cutting effect of the side edge of the end mill, ignoring the effect of the bottom cutting edge Influence on theoretical modeling of cutting force, resulting in low prediction accuracy

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