| 摘要 |
FIELD: mechanical engineering. SUBSTANCE: every neck of main bearings is formed by couterboring on horizontal milling machine, with table carrying the article being machines moving in transverse direction along machine spindle axis. Combination tool is made in the form of attached counterbores positioned between intermediate rings of mandrel. Every attached counterbore is of diameter equal to that of main bearing neck, and its length is determined by formula L<SB>c</SB>= L<SB>neck</SB>+L<SB>cut</SB>+L<SB>ov</SB>,, where L<SB>c</SB> is attached counterbore length, L<SB>neck</SB> is length of main bearing neck, L<SB>cut</SB> is cutting-in length, and L<SB>ov</SB> is overtravel length. EFFECT: improved process of machining. 2 cl, 3 dwgd
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