Burring processing method, jig for burring processing, and burri

Details Burring processing method, jig for burring processing, and burri Burring processing method, jig for burring processing, and burri

1996-01-03

1997-10-07

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

With cutting of work or product

72 75, B21D 2828

Patent

active

056735804

ABSTRACT:
A burring processing method for performing burring processing for a metallic pipe 90 within a short time to provide a beautifully finished appearance. A jig with an inclined section 15 is inserted into the inside of the metallic pipe 90 with a prepared hole 91. After the jig and the metallic pipe 90 are fixed in a state that the inclined section 15 of the jig is aligned with the prepared hole 91, steel balls 41 having a diameter greater than that of the prepared hole 91 are pressed against the inclined section 15 inside the metallic pipe 90 so that the steel ball 41 is pushed from under the prepared hole 91 to the outside of the metallic pipe 90.

REFERENCES:
patent: 691454 (1902-01-01), Dies
patent: 3154130 (1964-10-01), Streeter

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