Metal deforming – With use of control means energized in response to activator... – Sensing tool or tool-linked part
Patent
1996-11-15
1998-06-30
Crane, Daniel C.
Metal deforming
With use of control means energized in response to activator...
Sensing tool or tool-linked part
72291, B21C 120
Patent
active
057717273
ABSTRACT:
A process for drawing stretched metal workpieces, especially tubes, for the purpose of cross-sectional reduction in more than one drawing step using at least two sequential drawing aggregates. The aggregates grip the workpiece on the outer periphery, with two alternately-moved clamping carriages, which draw the workpiece continuously through respective drawing rings associated with the respective aggregates and arranged in respective drawing-ring holders. The drawing aggregates can be driven independently of one another in a power-regulated and/or moment-regulated manner. Furthermore, during the drawing process, a defined prestress force, which prevents deflection of the workpieces from a straight line, is maintained at all times in the section of the workpiece located between the drawing aggregates.
REFERENCES:
patent: 3138243 (1964-06-01), Oakley
patent: 3690133 (1972-09-01), Hilgers
patent: 3798939 (1974-03-01), Mertens et al.
patent: 4119254 (1978-10-01), Lorenz
patent: 4127999 (1978-12-01), Lorenz
patent: 4662203 (1987-05-01), Kanatani
patent: 4879892 (1989-11-01), Paraskevas
Hausler Karl Heinz
Kalkenings Peter
Stinnertz Horst
Crane Daniel C.
Mannesmann Aktiengesellschaft
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