ISO 2772:2019 pdf free download.drilling machines – Testing of the P Test conditions for box type vertic accuracy.
1 Scope
ISO 2772 specifies, with reference to Iso 230-1. geometrical tests on general purpose and normal accuracy box type vertical drilling machines. It also specifies the applicable tolerances corresponding to the above-mentioned tests.
ISO 2772 deals only with the verification of accuracy of the machine.
It does not apply to the testing of the machine operation (vibrations, abnormal noises, stick-slip motion of components, etc.) or to machine characteristics (such as speeds, feeds, etc.), which are generally checked before testing of machine accuracy.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of ISO 2772. 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 — Part 1: Geometric accuracy of machines operating under no-load or quasi-static conditions
lSO/TR 230-11:2018, Test code for machine tools — Port 11: Measuring instruments suitable for machine tool geometry tests
3 Terms and definitions
For the purposes of ISO 2772, the terms and definitions given in ISO 230-1 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
52 Reference to ISO 230-1 and ISO/TR 230-11
To apply ISO 2772, reference shall be made to ISO 230-1. especially for the installation of the machine before testing, the warming up of spindles and other moving components, description ot measuring methods and recommended acruracy of the test equipment.
Where the test concerned is in compliance with the specifications of ISO 230-1. a reference to the corresponding suhclause of ISO 230.1 Is shown before the Instructions In the Obscrvations” block of the tests described In Clauses 5 and ui.
5.3 Testing sequence
The sequence in which the tests are presented In this document In no way defines the practical order of testing. In order to make the mounting of instruments or gauging easier, tests may be performed in any order.
5.4 Test to be performed
When testing a machine, it is not always necessary or possible to carry out all the tests described in ISO 2772. When the tests are required for acceptance purposes, It is up to the user to choose, in agreement with the supplier/manufacturer, the relevant tests relating to the components and/or the properties of the machine which are of interest. These tests are to be clearly stated when ordering a machine. A simple reference to this document for the acceptance tests, without specifying the tests to be carried out or without agreement on the relevant expenses, cannot be considered as an agreement between manufacturer/supplier and user.
5.5 Measuring Instruments
Measuring instruments indicated in the tests described below are only examples. Other instruments capable of measuring the same quantities and having the same, or a smaller, measurement uncertainty may be used. Reference shall he made to ISO 230-1:2012, Clause 5, which indicates the relationship between measurement uncertainties and the tolerances.
5.6 Minimum tolerance
When estabLishing the tolerance for a measuring length different from that given in this document
(see ISO 230-1:2012, 4.1), it shall be taken into consideration that the minimum value of tolerance is
0,010 mm.
5.7 Levelling
Prior to conducting tests on a box type vertical drilling machine, the machine should be Levelled according to the recommendations of the manufacturer/supplier (see ISO 230-1:2012,6.1.2).