Thread cutting die head for power driven threading machines

Details Thread cutting die head for power driven threading machines Thread cutting die head for power driven threading machines

1985-05-10

1986-09-23

Combs, E. Michael

Cutting by use of rotating axially moving tool

With work-engaging structure other than tool or tool-support

With means actuated by work to release tool from fixed...

10 96T, 101205R, 408148, 408178, B23G 102, B23G 512

Patent

active

046132600

ABSTRACT:
An annular thread cutting die head for a power driven threading machine is comprised of an annular support plate supporting a plurality of radially displacable thread cutting dies spaced apart about the axis of the die head, and an annular cam plate assembly coaxial with and pivotal relative to the support plate to radially displace the cutting dies. The cam plate assembly is spring biased to pivot relative to the support plate in the direction to radially retract the cutting dies, and is selectively operable relative to the support plate to achieve the cutting of a straight thread or to achieve the cutting of a tapered thread. In connection with the cutting of a tapered thread, receding replacement of the cutting tools is controlled by a unique cam arrangement on the machine carriage engaged by the cam plate assembly under the spring bias and independent of torque imposed on the die head during the threading operation.

REFERENCES:
patent: 1396989 (1921-11-01), Breitenstein
patent: 1527185 (1925-02-01), Hall
patent: 1701846 (1929-02-01), Harrison
patent: 2271641 (1942-02-01), Hogg
patent: 2556742 (1951-06-01), Strickland
patent: 2710979 (1955-06-01), Strickland
patent: 3820180 (1974-06-01), Birkestrand et al.
patent: 4023211 (1977-05-01), Miyagawa
patent: 4370770 (1983-02-01), Wagner

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