Thermo-elastic structural analysis of a machine tool using a multi-channel absolute laser interferometer

Abstract

One of the main errors in the machining accuracy of machine tools is the displacement through thermal induced deformation. Modern design and construction methods aim to optimize the heat flow in the machine to achieve minimum displacement. To enable a further improvement it is essential to know the displacement state of the complete machine structure. However, most measurement methods that are used to capture the influence of a thermal load only measure the displacement of the TCP or individual axes. This paper presents a methodology to capture the complex spatial displacement condition of a state of the art machine tool in one measuring cycle using a multichannel laser interferometer. It describes the development of the measurement model as well as the measurement setup in the workspace of the machine. With measurements according to the presented procedure, it is possible to uncover weak points in the structure of a machine tool and to derive warm-up and cooling strategies.

Development on AI Optimizing Technology of NC Program Using Tool Free-Cutting Temperature for Turning

“…The back-propagation method was used here. The error function Ep of the training pattern p is shown in Equation (1).…”

“…The requirements for machining are high accuracy and high productivity. To achieve these goals, it is necessary to take measures against thermal deformation of the machine tool [1,2,3] and forced cooling of the cutting heat [4,5,6]. In addition, cutting of difficult-to-cut materials such as titanium alloy and nickel alloy, which are materials for aerospace industry parts, requires a large amount of cutting fluid and electrical energy for forced cooling to prevent cutting heat [7,8].…”

Model-Based, Experimental Thermoelastic Analysis of a Large Scale Turbine Housing

“…Thermal influences can account for a majority of errors in precision manufacturing. Therefore many research activities are dedicated to mitigate such effects [1][2][3][4]. Temporarily changing workpiece temperatures highly influence final part quality in production or accuracy in measurement processes [5][6][7].…”