Metal deforming – By use of tool acting during relative rotation between tool... – During rotation of work
Patent
1976-07-26
1978-06-27
Larson, Lowell A.
Metal deforming
By use of tool acting during relative rotation between tool...
During rotation of work
72121, 10152R, B21H 304
Patent
active
040967220
ABSTRACT:
A roll-type thread cutting die capable of cutting threads in shafts of varying diameters is disclosed. A plurality of threaded rollers are rotatably mounted on the smooth end portion of a plurality of bolts, each bolt having an intermediate main body portion, a smooth end portion and a grooved end portion. The main body portion of each of the plurality of bolts is supported by a different circumferentially spaced bore in a support plate having an axial bore capable of accommodating a shank on which threads are to be cut. Each of the plurality of circumferentially spaced bores is positioned a distance from the axial bore sufficient to enable the threads of its associated roller to contact the shank on which the threads are to be cut. A positioning plate having a plurality of grooved bores adapted to engage the grooved end portions of the bolts is positioned adjacent to the support plate and holds the bolts in a preselected angular orientation. The angular orientation of the bolts determines the distance the threads of each roller extend toward the axis of the axial bore thereby enabling the die to accommodate shanks of various diameters.
REFERENCES:
patent: 1549845 (1925-08-01), Munz
patent: 1571557 (1926-02-01), Paul
patent: 2541573 (1951-02-01), Conner
patent: 2720801 (1955-10-01), Erdelyi et al.
patent: 3353390 (1967-11-01), Bedker
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