BS ISO 3875:2020 pdf free.Machine tools – Test conditions for external cylindrical centreless grinding machines一Testing of the accuracy.
BS ISO 3875 The document specifies, with reference to ISO 230-1 and ISO 230-2, geometric tests, machining tests and tests for accuracy and repeatability of positioning axes on general purpose and normal accuracy manually and numerically controlled (NC] external cylindrical centreless grinding machines. It also specifies the applicable tolerances corresponding to the above-mentioned tests.This document deals only with the verification of accuracy of the machine. It does not apply to the testing of the machine operation (vibrations, abnormal noise, stick-slip motion of components, etc.) nor to machine characteristics (such as speeds, feeds, etc), which are generally checked before testing of machine accuracy. This document provides the terminology used for the principal components of the machine and the designation of the axes with reference to ISO 841.NOTE In addition to the terms used in the official ISO languages ( English and French), this document gives the equivalent terms in the German, Italian, Japanese, and Persian languages. These are published under the responsibility of the national member bodies for Germany (DIN), Italy (UNI), Japan [JIS), and Iran [ISIRI). However, only the terms given in the official languages can be considered as ISO terms.The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 230-1:2012, Test code for machine tools一Part 1: Geometric accuracy of machines operating under
no-load or quasi-static conditions ISO 230-2:2014, Test code for machine tools- Part 2: Determination of accuracy and repeatability of positioning of numerically controlled axes.The sequence in which the tests are presented in this document does not defines the practical order of testing. In order to make the mounting of instruments or gauging easier, tests may be performed in any order.BS ISO 3875 pdf download.