Advancing mechanism for automatic screw thread cutting machines

Cutting by use of rotating axially moving tool – Tool or tool with support – Having inversely angled cutting edge

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Details

408 63, 408130, B23G 1100, B23Q 526

Patent

active

041225724

ABSTRACT:
In an automatic screw thread cutting machine having a clamping carriage for clamping an elongated workpiece, one end portion of which is to be provided with a screw thread, and a spindle coaxially arranged with a workpiece held by said clamping carriage and carrying at one end thereof facing the end portion of the workpiece a screw cutting tool and being driven over a stepdown gearing from a motor, an advancing mechanism for advancing the clamping carriage towards said spindle and including a rod connected to the carriage and having a pair of opposite smooth parallel friction surfaces and a friction wheel driven by the spindle and pressed against one of the friction surfaces while the other friction surface is engaged by a counter roll. The friction wheel is exchangeble against a friction wheel of different diameter to thereby change the speed of advancement of the carriage.

REFERENCES:
patent: 1444109 (1923-02-01), Clay
patent: 1460088 (1923-06-01), Wilson
patent: 2051052 (1936-08-01), Morgan
patent: 2514775 (1950-07-01), Mackintosh
patent: 3071989 (1963-01-01), Timm

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