A study of the influence of processing parameters and tool wear on elastic displacements of the technological system under face milling

D Yu Pimenov,V I Guzeev,T Mikolajczyk,K Patra

doi:10.1007/s00170-017-0516-6

Abstract

A study of the influence of processing parameters and tool wear on the total elastic displacements of the technological system is based on a mathematical model of elastic displacements during face milling. The mathematical model takes into account both plane-parallel and angular displacements of the subsystems 0—“workpiece–device–machine table” and 1—“tool–device–z-head system.” The article covers the method of experimental determination of the element compliances of the GF2171S5 milling machine technological system. Angular compliances of the spindle assembly are not listed in the milling machine technical data sheet; therefore, this work gives a method for compliance determination along the coordinate axes of the machine and angular compliances of subsystems of the technological system. The article presents the adequacy assessment of mathematical models of elastic displacements of the technological system under face milling, for different values of tool flank wear on the flank surface. The article also presents the influences of face milling process parameters (workpiece material, cutting speed, cutting depth, the main cutting-edge angle, the cutter overhang to its diameter ratio, feed per tooth, and different values of the tool flank wear on the flank surface) on the total elastic displacements of the technological system, based on the estimated mathematical model of the elastic displacements of the technological system during face milling.

Highlights

In the process of face milling, the process parameters and elastic deformations of the technological system influence the dimensional accuracy and the surface topography of the machined parts [1,2,3,4,5,6,7]
4.2 The impact of cutting parameters and tool wear on elastic displacements of the technological system
This paper proposed a method to estimate total elastic deformations of the technological system in face milling process by consideration of tool flank wear along with machining process parameters

Summary

Introduction

In the process of face milling, the process parameters and elastic deformations of the technological system (tool-workpiece-machine tool assembly) influence the dimensional accuracy and the surface topography of the machined parts [1,2,3,4,5,6,7]. The cutting force, in turn, is generally determined by the following technological factors: cutting depth, cutting width, feed per tooth, and cutting speed. The value of tool wear on the flank surface of the milling tooth can influence the cutting force that results the elastic displacements of the technological system. How and to what extent these factors the mechanical properties of the workpiece and the cutting-edge angle affect the elastic displacements of the technological system at different values of tool wear on the flank surface have been insufficiently studied. Kolev and Gorchakov [4], and Medvedev [5] were the pioneers to include technological system deformations in their works to determine machining errors in the face milling process

Objectives

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Conclusion