Methods of and apparatus for controlling the gap between a mandr

Details Methods of and apparatus for controlling the gap between a mandr Methods of and apparatus for controlling the gap between a mandr

1982-12-13

1985-06-18

Larson, Lowell A.

Metal deforming

With use of control means energized in response to activator...

Sensing tool or tool-linked part

72264, 72262, B21C 3100, B21C 3300, B21C 5100

Patent

active

045234442

ABSTRACT:
Methods of and apparatus for controlling the gap between a mandrel and an extrusion die during extrusion wherein upon the actual gap between the mandrel and die during extrusion being detected as being larger than a predetermined gap, relative movement between the mandrel and die is produced to close the actual gap and establish the predetermined gap, and upon the actual gap between the mandrel and die during extrusion being detected as being smaller than the predetermined gap, relative movement between the mandrel and die is produced to open the actual gap and establish the predetermined gap.

REFERENCES:
patent: 3422648 (1969-01-01), Lemelson
patent: 3468152 (1969-09-01), Croseck et al.
patent: 3546908 (1970-12-01), Russell
patent: 3570288 (1971-03-01), Fischer et al.
patent: 3709013 (1973-01-01), Petsch
patent: 3950979 (1976-04-01), Fuchs, Jr.
patent: 4044580 (1977-08-01), Worden et al.
patent: 4420958 (1983-12-01), Schulz et al.

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