Method of making a component with a threaded hole

Details Method of making a component with a threaded hole Method of making a component with a threaded hole

1993-03-11

1995-07-25

Larson, Lowell A.

Threaded, headed fastener, or washer making: process and apparat

Process

Making internally threaded fastener, e.g., nut

B23G 700

Patent

active

054357861

ABSTRACT:
A method of making a threaded hole in a component includes the steps of inserting into a preformed hole a cold forming tool comprising spaced apart threaded forming rings, a main passage for the passage of fluid extending through the tool, and branch passages leading from the main passage to outlets between adjacent thread forming rings, and directing pressure resistant lubricant fluid to flow under pressure through the passages to the outlets between adjacent rings into a gap between the tool and the wall of the hole to be threaded to cause the threads to be formed by displacement and deformation of the component material by the pressurized fluid.

REFERENCES:
patent: 2807813 (1957-10-01), Welles, Jr.
patent: 4693646 (1987-09-01), Andrews

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