Experimental research of the buttress thread milling with a general position tool

It is impossible or extremely difficult to produce thrust threads by thread milling using a kinematic scheme with parallel axes of the tool and thread. The paper presents kinematic schemes for the thrust threads shaping with intersecting axes of the tool and thread. These schemes provide a basis for design and development of an experimental bench for the thrust thread milling according to the proposed planetary kinematic scheme on a CNC three-coordinate modernized coordinate-boring machine. A single-tooth single-disk assembly thread milling cutter was manufactured. The paper describes the sequence of setting the required mutual arrangement of the tool and the workpiece. Experiments were conducted to simulate the S42?7 (GOST 10177–82) buttress thread milling with workpieces made of the AMg6 aluminum alloy. The experiment results establish a possibility to manufacture this thread profile in accordance with the 9th degree of accuracy according to GOST 25096–82. The paper shows that an increase in the tool manufacture accuracy raises the buttress thread milling accuracy significantly expanding the process technological possibilities.
EDN: NVUNYE, https://elibrary/nvunye

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