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US 6,297,466 B1Granted
Method for repairing steel spray-formed tooling with TIG welding process
AssigneeFord Motor Company
InventorsNakhleh Hussary, Paul Earl Pergande
Life of this patent
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Abstract
A machine tool or die that is fabricated from thermally spray-formed steel is repaired on the factory floor by first cleaning the area to be repaired to removed all dirt and impurities. Next the surface is prepared by means of preheating the surface with propane torches at a rate not exceeding 50° Centigrade per hour to boil off the moisture in the tool. The weldment is formed by the TIG welding process and then finished by conventional machining, grinding and polishing.
Claims14
The method for repairing thermal spray-form steel tooling such as die pieces comprises the steps of:
- cleaning the repair area of the spray-form tool of any dirt or impurities;
- preparing the repair area by slowly preheating for a predetermined time to a predetermined temperature to boil off the moisture in the tool and to reduce the thermal shock of the welding process;
- and then
- depositing a weldment on the repair area by means of depositing a weld bead by Tungsten Inert-Gas, TIG, welding.
1 more element
Dependencies are inferred from the claim text.