Adjustable ball mandrel

Details Adjustable ball mandrel Adjustable ball mandrel

1985-09-23

1987-06-09

Larson, Lowell A.

Metal deforming

Tool and/or tool holder

Including flexible or yieldable tool or support

B21D 903

Patent

active

046710965

ABSTRACT:
A flexible ball mandrel for bending tubes which have different diameters and walls of varying thickness consisting of a series of self-lubricating balls, the diameters of which may be adjusted, and which are equally spaced apart for maintenance of a constant separation during a bend cycle connected to a shank for securing the mandrel elements properly together.

REFERENCES:
patent: 1683572 (1928-09-01), Mueller et al.
patent: 2057359 (1936-10-01), Baker
patent: 2776697 (1957-01-01), Zerlaut
patent: 2962077 (1960-11-01), Condiff
patent: 2971556 (1961-02-01), Armstrong et al.
patent: 3286503 (1966-11-01), Garrett
patent: 3456482 (1969-07-01), Maier et al.
patent: 4086803 (1978-05-01), Wheeler
patent: 4378689 (1983-04-01), Molz

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