Method of calculation the number of dimensions

This research work is located within the present context of raising standards in engineering education through the quality of teaching improvement. It is connected with preparation of competent and qualified engineers who are required at the Latvian labour market today. Engineering is the applied science of acquiring and applying knowledge to design analysis and work construction for practical purposes. Engineering is the subject that ranges from large collaborations to small individual projects. In any case a project has to be concrete; it must have its geometry, dimensions and other characteristics according to the basic rules of the technical drawing construction and performance. It is known that such a theme as 'Dimensioning' is the thing of a great difficulty for students because they must learn the basic rules of dimensioning, the technology of mechanical parts production and the ways of their control; as well as be able to use theoretical knowledge in practical work. Development of dimensioning skills is a necessary stage in the process of learning technical graphics. The aim of the work is students' knowledge on the theme 'Dimensioning' systematization, in particular, the research of the number of dimensions depending on the way of their placing and the kind of the part's production. The author of the article states the conception of an opportunity to calculate the number of dimensions in the technical drawing of a mechanical part. As a result, the method of the number of dimensions calculation was created. This method gives an opportunity to calculate the number of dimensions in the part's drawing before dimensioning quickly and correctly. It is necessary to note that the total number of dimensions for any part does not depend on the kind of technological treatment and the way of dimension placing. Application of this method raises students' learning activities in the process of studying the theme 'Dimensioning'. Correctly and rationally marked dimensions ensure good quality of the manufactured products.