VDI VDI/DGQ 3441 PDF

This guideline describes the basic principles of the statis-tical test methods. It is of direct application to the test-ing of machines which are tied to a particular component, that is for all special machines where the parts to be mach-ined are clearly defined. The Specification can also be used in its general sense for all machines which are not Ilea to a particular component, length measuring gauges, as well as for coordinate measuring machines, component and coordinate tables, and also for copying equipment and drawing machines. Furthermore, it forms the basis for an understanding of the guidelines VDI/DGQ 3442 to 3445, in which the method of checking the operation-al accuracy of lathes and milling, drilling and grinding machines which are not tied to a particular component is explained in more detail.

All these guidelines are recommendations. It is a matter for agreement between manufacturer and customer whether they are to be taken as the basis for the accept-ance of new machines. Furthermore, the results of such tests can provide basic information to assist in produc-tion planning and ensure reliability of manufacture. The tests described are suitable for checking the operation of machines which have been in use for a long period, or they can be directed to the analysis of weak points in-dicated by the occurence of defective parts.