Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 3) (First Revision) which is identical with ISO 230-3 : 2020 ‘Test code for machine tools - Part 3: Determination of thermal effects’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on recommendation of the Machine Tools, Machine Tool Elements, and Holding Devices Sectional Committee and approval of the Production and General Engineering Division Council.

This standard specifies test procedures to determine thermal effects caused by a variety of heat inputs resulting in the distortions of a machine tool structure or the positioning system. It is a recognized fact that the ultimate thermo-elastic deformation of a machine tool is closely linked to the operating conditions. The test conditions described in this document are not intended to simulate the normal operating conditions but are to facilitate performance estimation and to determine the effects of environment on machine tool performance. For example, use of coolants can significantly affect the actual thermal behaviour of the machine tool. Therefore, these tests are considered only as the preliminary tests towards the determination of actual thermo-elastic behaviour of the machine tool if such determination becomes necessary for machine characterization purposes. The tests are designed to measure the relative displacements between the component that holds the tool and the component that holds the workpiece as a result of thermal expansion, contraction, or distortion of relevant structural elements.