Brake die inserts

Details Brake die inserts Brake die inserts

2005-09-09

2008-07-22

Jones, David B (Department: 3725)

Metal deforming

By tool-couple embodying nonplanar tool-face

With adjustable or replaceable section of tool-face

C072S389300, C072S389600, C072S481100, C072S482500

Reexamination Certificate

active

07401491

ABSTRACT:
A tool system for brake forming having a punch or a die and at least one insert. In one embodiment, two inserts are removably attached to a die. The die has a defined shape running along a longitudinal axis. Each insert has a protrusion with a particular cross-sectional shape running along the same longitudinal axis. The die has two cavities, each cavity having a cross-sectional shape matching the cross-sectional shape of the protrusion of one of the inserts. In another embodiment, the die has two protrusions and each insert has a cavity for receipt of one of the protrusions of the die. When one of the protrusions is inserted into one of the cavities, the insert is removably fixed to the die. At least one surface of each insert corresponds to and combines with the defined shape of the die, forming a bending surface against which a sheet of metal is formed. After press braking, the sheet of metal is substantially conformed to the defined shape of the die. In another embodiment, an insert is removably attached to a punch such that the insert forms the entire surface of the punch system that contacts the sheet of metal to be shaped during press braking. The inserts are positioned such that they encounter most of the wear caused by the brake forming, whereas the punch and the die encounter only minimal wear. As a result, the inserts are inexpensively repaired or replaced when needed, but the punch and the die remain in good condition during extended use.

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Power Brake Dies Inc.,“General Purpose and Special Press Brake Tooling”, 1974, Catalog 480, pp. 1-17.

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