Metal deforming – With means to drive tool – Including cam-actuated support
Patent
1995-08-17
1996-05-14
Jones, David
Metal deforming
With means to drive tool
Including cam-actuated support
72370, 72392, B21C 3729, B21D 1900
Patent
active
055157106
ABSTRACT:
The device for necking pipes forces the pipe wall outward in such a way that a neck is formed around the hole. The device has a body to be inserted into the interior of the pipe and a die which is movable radially to the pipe, the outer diameter of the die corresponding to the inner diameter of the desired neck. The cylindrical outer surface of the body is dimensioned, at least in the vicinity of the necking location, in such a way that it corresponds to the cylindrical interior of the pipe so as to support the pipe from the inside during the necking operation. A bore hole or opening which is directed at least substantially radially is located at the body in the region of the cylindrical surface and is dimensioned in such a way that it receives the die or its lower part with a sliding guiding fit. The die can be moved in the guide through the bore hole or opening in the direction of the latter. An elongated wedge is displaceable in the axial direction in the interior of the body and its surface and/or groove forms a flat wedge angle with the axial direction. The lower end of the die moves in a sliding manner so as to contact said wedge surface and/or groove.
REFERENCES:
patent: 1157073 (1915-10-01), Baash
patent: 1574900 (1962-03-01), Kellogg
patent: 1892712 (1933-01-01), Taylor
patent: 2868263 (1959-01-01), Marquis et al.
patent: 2910897 (1959-11-01), Huet
patent: 3064707 (1992-11-01), Walts
patent: 4400966 (1983-08-01), Eckold
Efes Tex AG
Jones David
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