DOMITE ASSEMBLY POINT

DISPOSITIF D'ASSEMBLAGE DU TYPE « 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 Point incorporates a recessed
depression
into the casting that an adjacent raised Point on the steel backing plate fit
into allowing
the assembled pieces to fit together without the need of additional fastening
methods such
as wire or spot welding. The assembled parts can then be brazed using standard
techniques.

Claims

CLAIMS
When securing the assembled casting, copper and backing plate the Domite®
Assembly
Point utilizes a recessed depression integrated into the casting which fits
over a raised
point located on the steel backing plate which mirrors the depression to
create a fixed
point where the two pieces cannot slide off of one another. Exhibit 3 & 6 show
the
assembled pieces fitting together. The depression provides adequate depth and
clearance
to allow the copper brazing agent and the steel to fit securely into the
depression on the
casting without the need of additional fastening. Exhibit 1& 4 and 2 & 5 shows
detailed
dimensions of the castings and backing plates.
The parts in claim 1 are not limited to the dimensions and shape of the
Exhibits shown.
The Wear Button shown on Exhibit 1, 2 and 3 demonstrate a typical part. The
Wear
Plate on Exhibit 4, 5 and 6 are also typical parts. The Domite Assembly Point
can be
used on any casting and backing plate assembly suitable for the lamination
process. The
parts in claim one is also not limited to only one Domite® Assembly Point
per casting.
For example when securing larger rectangular plates multiple Domite®
Assembly Points
are optimum to prevent shift from occurring as shown in Exhibit 4, 5, and 6.
The size
and shape of the Domite® Assembly Point are also not limited to the
circular Point
shown in Exhibit 1, 2 and 3, square, triangular, crosses, stars, polygons,
octagons,
pentagons and any shape suitable for a manufacturing procedure are all
acceptable forms
of Points. The size of the Domite® Assembly Point must be substantial
enough to secure
the casting and steel while not infringing on the integrity of the casting or
steel. The
determination of size and location of Domite® Assembly Points vary from
piece to piece
and are determined by an experienced production professional based on the
configuration
and size of each individual casting and steel.
The Domite® Assembly Point depression is a cast-in feature of the casting
itself while
the raised Point on the backing plate is an additional step that can be added
through
multiple techniques. Depending on the size and location of Points any of the
following
methods are acceptable, forging, stamping, welding or securing solid fastener
such as
washers or tabs of steel using welding or soldering techniques or adhesives.
Points on the
backing plate can be added using the best methods suitable for each individual
part left to
the discretion of an experience production professional.

Description

CA 02578964 2007-02-14
DQMITE* ASSEMBLY POINT
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
2). 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. Traditiorially
the adjacent
surfaces on both materials are surface machined to obtain a clean and flat
mating area. A
thin strip of copper cut to match the profile of the surfaces is placed in-
between the
mating surfaces to create an assembled part.
Prior to brazing the two materials, it is necessary to secure the assembled
parts in order to
facilitate a complete bond and to eliminate the possibly of shift from
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 DomiteR Assembly Point was developed to eliminate the need to secure the
asseinbled parts using the above mentioned techniques and also to eliminate
the
possibility of shift.
Exhibit 3 shows a typical assembly incorporating the Domitet Assembly Point.

Representative Drawing