IS 15250 : Part 2 : 2024/ISO 10791-2 : 2023 Test Conditions for Machining Centres - Part 2 Geometric Tests for Machines with Vertical Spindle (Vertical Z-axis)
NATIONAL FOREWORD
This Indian Standard (Part 2) (First Revision) which is identical to ISO 10791-2 : 2023 'Test conditions for machining centres - Part 2: Geometric tests for machines with vertical spindle (vertical z-axis)' 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.
A machining centre is a numerically controlled machine tool capable of performing multiple machining operations, including milling, boring, drilling and tapping, as well as automatic tool changing from a magazine or similar storage unit in accordance with a machining program.
The objective of the IS 15250/ISO 10791 series of standards is to provide information as widely and comprehensively as possible on tests that can be carried out for comparison, acceptance, maintenance or any other purpose deemed necessary by the user or manufacturer/supplier.
This standard was first published in 2018 based on ISO 10791-2 : 2001. This revision of this standard has been undertaken to align it with the latest version of ISO 10791-2.
This standard has been published in 10 parts. Other parts in this series are:
Part 1 Geometric tests for machines with horizontal spindle and with accessory heads (horizontal Z-axis)
Part 3 Geometric tests for machines with integral indexable or continuous universal heads (vertical Z-Axis)
Part 4 Accuracy and repeatability of positioning of linear and rotary axes
Part 5 Accuracy and repeatability of positioning of work – Holding pallets
Part 6 Accuracy of speeds and interpolations
Part 7 Accuracy of finished test pieces
Part 8 Evaluation of contouring performance in the three coordinate planes
Part 9 Evaluation on the operating times of tool change and pallet change
Part 10 Evaluation of thermal distortions'
The major changes incorporated in this revision are as follows:
a) Tests applying to all configurations of machines have now been grouped in 5 (tests G5.1 to G5.14);
b) Test for optional horizontal spindles and integral or accessory spindle heads forming the object of Annexes A through C in the first edition of this document, have been deleted and will be covered by a more general standard, as they are not only used in machining centres;
c) Tests for the movements of four types of work holding tables have been introduced, respectively as 6, 7, 8, and 9, as explained in 4.5 and Table 1;
d) Three new Annexes A, B, and C have been introduced, dealing with the error motion of rotary axes belonging to spindles and to rotary and tilting tables; and
e) The test of the table flatness (formerly G15) has been deleted.
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.