Concentric bore bend die and clamp insert assembly

Details Concentric bore bend die and clamp insert assembly Concentric bore bend die and clamp insert assembly

2006-07-18

2006-07-18

Banks, Derris H. (Department: 3725)

Metal deforming

By deflecting successively-presented portions of work during...

By use of work-contacting wiper and moving, work-holding form

C072S157000

Reexamination Certificate

active

07076982

ABSTRACT:
A concentric bore bend die and clamp insert assembly including a bend die and a clamp insert positioned within a recess formed in the bend die in a tube clamping area of the bend die. The clamp insert includes a curved portion matingly received within a correspondingly shaped curved bore in the recess, such that the curved portion extends between a tube groove in the insert and the curved bore. The curved portion of the clamp insert and the curved bore are radially concentric in order to evenly disperse clamping pressures exerted on the clamp insert in all radial directions across the curved portion of the clamp insert to the curved bore. The clamp insert further includes a non-circular portion that is matingly received within a correspondingly shaped non-circular region of the recess in order to resist rotational movement of the clamp insert with respect to the bend die.

REFERENCES:
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patent: 4137743 (1979-02-01), Schwarze
patent: 4765168 (1988-08-01), Stange et al.
patent: 4888971 (1989-12-01), Schwarze
patent: 4899567 (1990-02-01), Lenglet et al.
patent: 5142895 (1992-09-01), Schuchert
patent: 5315852 (1994-05-01), Talley et al.
patent: 5481891 (1996-01-01), Sabine
patent: 5819574 (1998-10-01), Yogo
patent: 5927124 (1999-07-01), Webster
patent: 6155091 (2000-12-01), Hayes et al.

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