Metal deforming – By plural tool-couples – With means to feed work between plural tool stations
Patent
1996-08-02
1999-08-17
Crane, Daniel C.
Metal deforming
By plural tool-couples
With means to feed work between plural tool stations
7240512, 1986211, 470109, 470154, B21D 4305
Patent
active
059376937
ABSTRACT:
A transfer apparatus for use in a press in which successive workpieces are sequentially transferred from one to the next of a plurality of working stages arranged along a line. The transfer apparatus has a transfer bar having a plurality of workpiece holding devices such as air chucks each being capable of holding and releasing the workpiece, and a driving unit provided at the rear side of the press. The driving unit has advance/return mechanism having a first servo-motor and a rack-pinion mechanism which cooperate in driving the transfer bar in advance and return directions, a lift/down mechanism having a second servo-motor and a rack-pinion mechanism which cooperate in driving the transfer bar in lift and down directions, and an approach/retract device having a third servo-motor and a rack-pinion mechanism which cooperate in driving the transfer bar in approaching and retracting directions, so that successive workpieces are transferred from one to the next working stages of the press so as to undergo a series of steps of press work. Dies and workpieces are easily observed during the press working and efficiency of die exchanging work is improved because the driving unit is disposed on the rear side of the press.
REFERENCES:
patent: 3937056 (1976-02-01), Henzler
patent: 4272981 (1981-06-01), Endter
patent: 4463587 (1984-08-01), Werner
patent: 4540087 (1985-09-01), Mizumoto
patent: 4604021 (1986-08-01), Werner
patent: 4621516 (1986-11-01), Schafer
patent: 5423202 (1995-06-01), Komatsu
patent: 5617756 (1997-04-01), Thudium
Endou Kenichi
Itakura Hideo
Aida Engineering Ltd.
Crane Daniel C.
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