IS 17257 : 2024/ISO 26303 : 2022 Machine Tools - Short-Term Capability Evaluation of Machining Processes on Metal-Cutting Machine Tools
NATIONAL FOREWORD
This Indian Standard (First Revision) which is identical to ISO 26303 : 2022 'Machine tools - Short-term capability evaluation of machining processes on metal-cutting machine tools' issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Machine Tools, Machine Tool Elements and Holding Devices Sectional Committee and approval of the Production and General Engineering Division Council.
Assessing the short-term capacity of machining processes presents a distinct method within machine tool evaluation, contrasting with conventional performance testing methods outlined in various Indian Standards like IS 2063/ISO 230 (all parts) and specific standards for different machine tool types. Notably, this approach involves machining a sample batch of test pieces, identifying relevant influencing factors, and conducting statistical analysis to evaluate the quality-related data derived from such tests.
This standard was first published in 2019 based on ISO 26303 : 2012. This revision of this standard has been undertaken to align it with the latest version of ISO 26303.
The major changes incorporated in this revision are as follows:
a) Additional explanations have been added in 6.6 “Measurement” and for formula (23);
b) The indices of variables in formula (3) and formula (18) have been corrected;
c) Agreement forms 2 to 4 of Annex B, analysis form 2 of Annex C, agreement forms 3 and 4 of Annex D and analysis forms 1 and 2 of Annex D have been corrected;
d) The references in Figure 2 have been revised;
e) Fig. A.1 has been improved;
f) The status of Annexes B and C has been changed to informative; and
g) The formulae in analysis form 4 of Annex C and in analysis form 4 of Annex D have been corrected.
The text of ISO standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:
a) Wherever the words 'International Standard' appear referring to this standard, they should be read as 'Indian Standard'; and
b) Comma (,) has been used as a decimal marker while in Indian Standards, the current practice is to use a point (.) as the decimal marker.