Результаты (
английский) 2:
[копия]Скопировано!
According to the research it was concluded the main conclusions :
1) identified five stages of thermal drilling process .
2) The dependence of the geometry otbortovok feed and thickness of the workpiece .
3) The dependence of the strength of the threaded connection on the section of the feed .
4) proved hardening of the material in the hole formation zone .
5) The resulting hole corresponds to the admission of the inner diameter of 7 degree of accuracy .
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