Cutting – Processes – During movement of work past flying cutter
Reexamination Certificate
1999-09-29
2001-03-27
Bray, W. Donald (Department: 3725)
Cutting
Processes
During movement of work past flying cutter
C083S294000, C083S318000, C083S320000, C072S203000
Reexamination Certificate
active
06205896
ABSTRACT:
FIELD OF THE PRESENT INVENTION
The field of the present invention is that of hydraulic presses used in conjunction with roll forming machines and methods of the utilization thereof.
BACKGROUND OF THE INVENTION
In the prior art, hydraulic presses are used in conjunction with roll forming machines. The hydraulic press punches apertures into the work piece and/or cuts the work piece to length after the work piece has been formed by the roll forming machine. The hydraulic press includes a hydraulic drive which forces a first surface downward towards a two-part die. The die upper half is forced downwardly into the work piece by the hydraulic press first surface. The hydraulic press and die both move with the work piece. The die and press move independently of each other along a work path. The die is initially engaged with the moving work piece, and is moved by the moving work piece. Once the die is moving, it engages the press. The work piece then moves both the press and the die. The hydraulic press is then actuated to apply the downward force after it begins moving with the die. Since the die is already moving when it contacts the press, the inertia which must be overcome to begin the press to move is relatively low. Moreover, the momentum from the moving die assists in overcoming the inertia of the press. If the work piece is held in tension when the die engages the work piece, the performance of the die puncture or cutting operation is enhanced. It would be desirable to provide a hydraulic press which can hold a moving work piece in tension when it is acted upon by the die. It is also desirable to provide a hydraulic press and method of utilization thereof which can hold both sides of the work piece in tension when the die engages the work piece.
SUMMARY OF THE INVENTION
To meet the above noted desires, the revelation of the present invention is brought forth. In a preferred embodiment the present invention provides a machine having a fixed base with at least one rail. A hydraulic press having guides is slidably disposed on the rail of the fixed base. A counter is provided for determining the length of moving material which is passed to the hydraulic press. A die is slidably mounted on the hydraulic press for operatively engaging the moving coil of material upon activation of the hydraulic press. Fixably connected with the die is a clamp which is also slidably mounted on the hydraulic press. The clamp secures the moving coil of material when the die engages the moving coil of material and keeps it in tension during the die engagement. A first stop is disposed between the hydraulic press and the die for providing engagement there between to stop relative movement between the die and the press when the die is moved by the moving coil of material. An accelerator is actuated by a signal provided by the counter. The accelerator moves the hydraulic press along with the moving coil of material. A second stop limits the position of the clamp with respect to the hydraulic press. Take off rollers are provided for removing the moving coil of material from the press after the press is actuated.
It is an object of the present invention to provide a hydraulic press which can engage a set of dies with a moving coil of material.
It is another object of the present invention to provide a hydraulic press with a clamp that will clamp onto the material and hold the material in tension when the material is being engaged by the die.
It is a further object of the present invention to provide a hydraulic press with take off rollers which retain the work piece in tension at an outlet in the hydraulic press when the die engages the work piece.
The above noted and other objects of the present invention will become more apparent to those skilled in the art as the invention is further explained in the accompanying drawings and detailed description.
REFERENCES:
patent: 3129624 (1964-04-01), Aver
patent: 3272045 (1966-09-01), Cookson
patent: 3704643 (1972-12-01), Cookson
patent: 3803966 (1974-04-01), Plegat
patent: 3805654 (1974-04-01), Plegat
patent: 4407179 (1983-10-01), Iwase et al.
patent: 5816127 (1998-10-01), Ouchi et al.
Bray W. Donald
Dykema Gossett PLLC
Tishken Products Co.
LandOfFree
Die accelerator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Die accelerator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Die accelerator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2526017