Metal deforming – By application of fluent medium – or energy field – With actuated tool engaging work
Patent
1990-10-05
1991-10-22
Larson, Lowell A.
Metal deforming
By application of fluent medium, or energy field
With actuated tool engaging work
72370, B21D 1506
Patent
active
050584090
ABSTRACT:
Herein disclosed is a wrinkled pipe manufacturing apparatus in which an elastic member is inserted into a pipe to be worked and is pushed from at least one side so that it may be radially bulged to form an annular bulge on the circumference of the pipe and in which a punch and a chuck disposed around the circumference of the pipe are axially moved relative to each other to form a wrinkle from the annular bulge. The apparatus comprises: first and second mandrels held over a bed to move freely in the axial directions along the upper face of the bed and adapted to bear the pipe on their circumferences; first drive means for driving the mandrels in the axial directions; an elastic member arranged in the pipe and between the leading end faces of the first and second mandrels; second drive means for moving a punch and a chuck; and guide means for guiding the chuck and the punch in the axial directions on a concentric plane of the axis.
REFERENCES:
patent: 2581787 (1952-01-01), Dreyer
patent: 2954064 (1960-09-01), De Mers
patent: 3067744 (1962-12-01), Cooper et al.
patent: 3083754 (1963-04-01), De Mers
patent: 3130771 (1964-04-01), Peyton
patent: 3339386 (1967-09-01), Homfeldt
patent: 3375689 (1968-04-01), Millar
patent: 4364252 (1982-12-01), Koizumi
Casella Anthony J.
Hespos Gerald E.
Larson Lowell A.
McKeon Michael J.
Usui Kokusai Sangyo Kaisha Limited
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