Method for positioning a strongback

Details Method for positioning a strongback Method for positioning a strongback

1976-09-10

1978-01-17

Husar, Francis S.

Metal founding

Process

Shaping a forming surface

164 35, 164 60, 164235, 164246, B22C 910, B22C 702

Patent

active

040687023

ABSTRACT:
The present invention provides a method for improved positioning of a strongback in a pattern mold for formation of expendable patterns thereon. Investment casting molds formed around the assembly of strongback and patterns are characterized as having the strongback precisely and reproducibly suspended therein. Articles, such as turbine blade halves, cast in such investment molds have mating surfaces in close dimensional relationship and can be bonded one to any mating other to form a finished product.
In particular, improved positioning of the strongback in the pattern mold is achieved by suspending the strongback from the bonding locators by expendable locating means; that is, locating means which are incorporated into the patterns formed on the strongback surfaces. The use of expendable locating means enables the bonding locators to also serve as locators for positioning the strongback in the pattern mold and essentially eliminates errors in strongback positioning due to tolerances associated therewith.

REFERENCES:
patent: 3648760 (1972-03-01), Cooper

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