RELIABILITY INCREASE OF THREAD CUTTING WITH TAP BORERS IN SUPER-SMALL HOLES
Abstract and keywords
Abstract (English):
The purpose of this work consists in the reliability increase of thread cutting with the use of tap borers in super-small holes of aluminum alloy parts. The investigation methods used are based on classic regulations of the cutting theory, physical-chemical mechanics of materials, reliability theory and methods of statistical analysis. There are revealed the reasons of thread cutting low reliability and tool failure. The effectiveness of edge anode-machining use at thread cutting is researched. On the basis of data obtained there is carried out a calculation of basic indices of thread cutting reliability. A comparative analysis of the processing reliability indices obtained under standard conditions and with the use of the developed circuit of anode-machining is shown, the effectiveness of the latter use is presented. As a result of the investigations carried out there is developed a technology for thread cutting in super-small holes that ensures a considerable increase of reliability and allows excluding hand work during the process.

Keywords:
super-small diameter, reliability, thread cutting, failure intensity
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