Attention focuses on the fast drilling of small-diameter holes by core flat drills, hard-alloy drills, and unidirectional drills with the supply of working fluid to the cutting zone. Means of improving the productivity are discussed. The best approach to drilling small-diameter holes is outlined.
The design of technological equipment for metal-cutting machines is considered, for the example of machining and monitoring attachments. Their design on the basis of a systems approach is outlined. The principles and technology for systems design of technological attachments are briefly outlined.
Examples are presented to illustrate the high-speed drilling of small-diameter holes (up to 10 mm) by core flat drills: holes (diameter 7 mm) in a discharge valve; and the drilling two-part holes consisting of a cylindrical section (diameter 3.8 mm) and conical section (base diameter 10 mm) in a metal housing.
A model is developed for optimization of the high-speed drilling of small-diameter holes by core flat drills. Thanks to the structure of the model, the problem reduces to optimization of the process under constraints associated with optimization of the bit’s structure and geometry.
General information is presented regarding the structure of universal machine-tool attachments. Their main sources of inadequacy are analyzed. As an illustration, the improvement of universal attachments by modification of their contact elements is considered in more detail.
General information regarding universal modular attachments and their classification is considered. The main benefit of universal modular attachments is considerable expansion of the equipment for ensuring specified machining precision and improving the productivity by minimizing auxiliary operations.
Financed by the National Centre for Research and Development under grant No. SP/I/1/77065/10 by the strategic scientific research and experimental development program:
SYNAT - “Interdisciplinary System for Interactive Scientific and Scientific-Technical Information”.