Metal deforming – By plural tool-couples – With means to feed work between plural tool stations
Reexamination Certificate
1999-10-20
2001-04-17
Crane, Daniel C. (Department: 3725)
Metal deforming
By plural tool-couples
With means to feed work between plural tool stations
C072S405110, C198S621100
Reexamination Certificate
active
06216523
ABSTRACT:
BACKGROUND OF THE INVENTION
1) Technical Field
This invention relates generally to assemblies used to transfer workpieces through a machine having a reciprocating member. More specifically the invention is related to an assembly which engages the workpieces to move them progressively from one die station to another so that a plurality of sequential operations may be performed on them.
2) Description of the Prior Art
Workpiece transfer assemblies for use in progressive die type punch presses are well known in the art. Transfer assemblies typically derive motion from a ram press which interacts with a combination of cams for moving rotating members in a desired pattern. An example of such a transfer assembly is U.S. Pat. No. 4,833,908 to Sofy, the named inventor of the subject invention.
Increasingly, manufacturing quality standards have required more precise manufacturing processes. To achieve more precision, electronic and computer process control systems have been introduced into the manufacturing environment. A need for this type of control exists in transfer press operations. More specifically, electronic control over a transfer assembly would enhance the die forming process and improve quality by providing improved process control and fault notification.
SUMMARY OF THE INVENTION AND ADVANTAGES
A workpiece transfer assembly for a press of the type including a reciprocating member and a series of in-line stations wherein each station is a further progression of the workpiece forming process includes a workpiece engaging jaw having clasps attached thereto for clasping the workpieces. A lateral motion mechanism moves the jaw in a horizontal direction and laterally relative to the work stations into and out of workpiece engagement position. A vertical motion mechanism moves the jaw in a vertical direction relative to the workstations. A linear motion mechanism moves the jaw in a horizontal direction and linearly relative to the work stations. The assembly includes a reciprocal horizontal motor for actuating the lateral motion mechanism, a reciprocal vertical motor for actuating the vertical motion mechanism, a linear motor for actuating the linear motion mechanism, and a controller for programming the motors through a programmed actuation process.
The subject invention provides the precise workpiece transfer motions and the electronic control over the transfer operation that is essential to meet contemporary process control standards.
REFERENCES:
patent: Re. 34581 (1994-04-01), Sofy et al.
patent: 4540087 (1985-09-01), Mizumoto
patent: 4852381 (1989-08-01), Sofy
patent: 4895013 (1990-01-01), Sofy
patent: 5267463 (1993-12-01), Doyama
patent: 5423202 (1995-06-01), Komatsu
patent: 5934125 (1999-08-01), Takayama
patent: 5937693 (1999-08-01), Endou
Farhat Dennis
Sofy Hugh
Crane Daniel C.
HMS Products Co.
Howard & Howard
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