Wear part
OwnerTheodore C. Weillinventor
Life of this patent
Estimating the term…
Abstract
A refurbished knife holder for wood chippers and a method of repairing wear parts are disclosed. The knife holder includes a machined recess and an insert bonded to the holder at the recess and machined to define the surfaces of the holder. The method includes the steps of preparing the wear part and the insert for bonding and bonding the insert to the wear part by an induction heating operation at approximately 1200.degree. F. A silver alloy filler material having approximately 50% silver and a flow point of approximately 1180.degree. F is employed.
Claims5
A method of repairing the wear parts of a wood chipper such as a knife holder, comprising the steps of:
- removing material from the worn area of the wear part to form a recess;
- forming an insert from a material having a coefficient of thermal expansion substantially equal to that of the material of the wear part, said insert dimensioned to fit within the recess;
- fluxing the recess;
- positioning a silver alloy filler in the recess;
- positioning the insert within the recess;
- induction heating the wear part and insert so that bonding occurs by brazing between the wear part and insert, said insert being formed from a surface hardened steel, said fluxing step employing a high temperature, paste form black flux;
- grit blasting the mating surfaces of said insert and said recess prior to fluxing the recess, said silver alloy filler material containing approximately 50% silver and having a flow point of approximately 1120.degree. F, said induction heating step including heating at a temperature of approximately 1200.degree. F for a period of at least one minute;
- and
- moving said insert once said heating step is started to insure wetting of the mating surfaces.
Dependencies are inferred from the claim text.