Prediction model for turn-milling machining spatial spiral trochoid motion trail and an instantaneous cutting force

Abstract

The invention discloses a prediction model for a turning and milling spatial spiral trochoid motion trail and an instantaneous cutting force, and belongs to the technical field of machining and manufacturing. The establishment process of the instantaneous cutting force prediction model is as follows: firstly, establishing a tool coordinate system and a workpiece coordinate system, secondly, establishing a space spiral trochoid motion track model; thirdly, establishing a single-tooth circumferential blade cutting angle and cutting angle model; fourthly, establishing a model of the cutting thickness and the cutting width of the single-tooth circumferential edge; and finally, establishing a theoretical orthogonal turn milling instantaneous cutting force model. The method can truly reflect the cutting motion track of the tool nose, and solves the problem of the motion track of the turn milling combined machining tool tooth.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing and manufacturing, and in particular relates to a helical trochoid motion track and an instantaneous cutting force prediction model in turning and milling processing space. Background technique [0002] As an advanced processing technology, turning and milling machining is different from traditional turning and milling methods. Turning and milling combined machining is a spatial helical trochoidal motion composed of the rotational motion of the workpiece, the rotation of the tool, and the feed motion along the helical line. , the trajectory of the tool tip is more complex. The traditional milling force model established by Tlusty et al. in 1975, which simplifies the motion trajectory of the cutter tooth in the milling process into a circle, was adopted by many subsequent scholars and became the basis of the cutting force prediction model in various milling processes. Therefore, the ...

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Problems solved by technology

[0003] The above studies take the basic circle of the end face of the end mill as the tooth trajectory, ignoring the influence of the end mill’s feed motion along the spatial helix in the Cartesian coordinate system of the machine tool on the tooth trajectory, resulting in the establishment of the instantaneous cutting thickness model of the cutting tooth, the instantaneous cutting The force prediction model cannot accurately reflect the combined machining conditions of turning and milling. Therefore, it is necessary to propose a real cutter tooth trajectory model to ensure the construction of an accurate instantaneous cutting force prediction model and lay the foundation for the subsequent real-time compensation of cutting force adaptive machining.

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