Process and apparatus for rounding sheet-metal blanks

Details Process and apparatus for rounding sheet-metal blanks Process and apparatus for rounding sheet-metal blanks

1995-06-29

1997-01-14

Crane, Daniel C.

Metal deforming

By deflecting successively-presented portions of work during...

With feeding of discrete articles or orienting of work...

72169, 72171, B21B 3902, B21D 514, B21D 910

Patent

active

055928447

ABSTRACT:
Sheet-metal blanks are fed in succession one immediately after another to a rounding apparatus in which they are plastically deformed into a curve in a rounding mechanism and are given a desired constant bending radius. The portion of the blank initially running out of the rounding mechanism in the natural rounding position is deflected by guide means under elastic deformation out of the rounding position into a transfer position which is different from the rounding position and is thereby elastically deformed so that the portion of the blank running out of the rounding mechanism is kept under stress. When the end portion of the sheet-metal blank leaves the rounding mechanism, it springs into the transfer position due to said stress, leaving the way clear for another sheet-metal blank, which can already be in the process of being rounded before the fully rounded sheet-metal blank is ejected from the rounding apparatus and conveyed away. This allows the cycle time for the rounding process to be reduced in a simple manner without impairment of rounding quality.

REFERENCES:
patent: 2719562 (1955-10-01), Beegle
patent: 4856312 (1989-08-01), Alznauer
patent: 4870241 (1989-09-01), Gysi
patent: 5120177 (1992-06-01), Steiger

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