Thread forming method, thread forming device, and thread...

Details Thread forming method, thread forming device, and thread... Thread forming method, thread forming device, and thread...

2006-10-31

2009-06-30

Ross, Dana (Department: 3725)

Metal deforming

By use of tool acting during relative rotation between tool...

With cutting of work or product

C470S084000, C470S206000

Reexamination Certificate

active

07552610

ABSTRACT:
A thread forming device10ais provided with a thread forming tool32for forming a thread portion14at a frame12, a first motor38for controlling to rotate the thread forming tool32, and a second motor40for controlling to extract and retract the thread forming tool32. Further, the thread forming tool32is provided with a pilot hole forming portion86provided with a spiral groove80bat a front end portion80in a taper shape, and a thread forming portion84constituted continuously to the pilot hole forming portion86and provided with a spiral groove84b.

REFERENCES:
patent: 4571687 (1986-02-01), Fukuyama et al.
patent: 4831674 (1989-05-01), Bergstrom et al.
patent: 6931901 (2005-08-01), Ghiran et al.
patent: 2006/0120826 (2006-06-01), Wieser et al.
patent: 2 067 440 (1981-07-01), None
patent: 05-253747 (1993-10-01), None

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