ISO 3875-2020 pdf free.Machine tools — Test conditionsfor external cylindrical centrelessgrinding machines — Testing of theaccuracy.
1.The document specifies, with reference to IS0 230-1 and IS0 230-2, geometric tests, machining testsand tests for accuracy and repeatability of positioning axes on general purpose and normal accuracymanually and numerically controlled (NC) external cylindrical centreless grinding machines. It alsospecifies 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 thetesting of the machine operation (vibrations, abnormal noise, stick-slip motion of components, etc.) norto machine characteristics (such as speeds, feeds, etc.), which are generally checked before testing ofmachine accuracy.
This document provides the terminology used for the principal components of the machine and thedesignation of the axes with reference to lSO 841.
NOTE In addition to the terms used in the official lSo languages (English and French), this documentgives the equivalent terms in the German, ltalian, Japanese, and Persian languages. These are published underthe responsibility of the national member bodies for Germany (DIN), ltaly (UNil), Japan (JIS), and lran (ISIRI).However, only the terms given in the official languages can be considered as iS0 terms.
2.Normative references
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document.For dated references,only the edition cited applies.Forundated references, the latest edition of the referenced document (including any amendments) applies.ISO 230-1:2012,Test code for machine tools — Part 1: Geometric accuracy of machines operating underno-load or quasi-static conditions
ISO 230-2:2014,Test code for machine tools – Part 2: Determination of accuracy and repeatability ofpositioning of numerically controlled axes
3.Terms and definitions:For the purposes of this document, the following terms and definitions apply.
3.1.centreless grinding:grinding for the generation of external faces of a rotating workpiece, position of which is mechanicallyguided against the grinding wheel by a regulating wheel and a work support located between theregulating and grinding wheels
3.2.centreless grinding machine:machine tool intended to machine workpieces by means of two rotating grinding wheels and worksupport.ISO 3875 pdf download.