DOMITE ASSEMBLY LIP

BORDURE EN DOMITE

English Abstract

In producing a laminated white iron composite the white iron casting is bonded
to a mild
steel backing plate through a brazing operation. The adjacent mating surfaces
of the
casting and backing plate are secured together along with the copper brazing
agent in
such an orientation so as to promote an acceptable bond and to eliminate any
shift from
the desired orientation. The Domite Assembly Lip incorporates a recessed
depression or
pocket in the backing plate that follows the dimensions and shape of the
casting creating
a edge or lip that allows the copper brazing agent and the machined face of
the casting to
fit into the pocket created in the backing plate securing the assembled pieces
together
without the need of additional fastening methods such as wire or spot welding.
The
assembled parts can then be brazed.

Claims

CLAIMS

When securing the assembled casting, copper and backing plate the Domite
Assembly
Lip utilizes a recessed depression integrated into the mild steel backing
plate which
incorporates a resulting raised edge or lip that parallels the dimensions and
contours of
the white iron casting. Exhibit 2 shows the assembled pieces fitting together.
The
depression provides adequate depth and clearance to allow the copper brazing
agent and
the casting to sit securely into the depressed pocket on the mild steel
without the need of
additional fastening. Exhibit I shows detailed dimensions of the casting and
backing
plate.


The parts in claim 1 are not limited to the dimensions and shape of the Wear
Buttons
shown. The Wear Button showed on exhibit 1 and 2 demonstrate a typical part.
The
Domite Assembly Lip can be used on any casting and backing plate assembly
suitable for
the lamination process.

Description

CA 02563627 2006-09-11

DOMITE ASSEMBLY LIP
DESCRIPTION

The manufacturing of a composite laminated white iron product consists of a
machined
ASTM A532 white iron casting (example casting shown on exhibit 1) bonded
through a
brazing procedure to a mild steel backing plate (example backing plate shown
on exhibit
1). The process combines the exceptional wear resistant properties of the
white iron with
the ductility and flexibility of mild steel.

The lamination is achieved by affecting a metallurgical bond between the white
iron
casting and the mild steel using copper as the bonding agent. Traditionally
the adjacent
surfaces on both materials are surface machined to obtain a clean and tlat
mating area. A
thin strip of copper cut to match the profile of the surfaces and is placed in-
between the
mating surfaces to create an assembled part.

Prior to brazing the two i~naterials it is necessary to secure the assembled
parts in order to
facilitate a complete bond and to eliminate the possibly of shift occurring
during the
brazing process which will result in the two mating surfaces misaligning from
their
originally desired orientation.

Assembled parts are secured together using various methods according to
appropriate
brazing techniques. "The most common method of securing the assembled parts is
the use
of baling wire. Other fastening methods can but are not limited to including
strapping,
banding and spot welding. All of these methods are time and resource consuming
while
not eliminating shift from occurring.

The Domite Assembly Lip was developed to eliminate the need to secure the
assembled
parts using the above mentioned techniques and also to eliminate the
possibility of shift.
Exhibit 2 shows a typical assembly incorporating the Domite Assembly Lip.