Centering and fastening device
AssigneeVince Bargados
InventorAntonio Carlos Gottifredi
Life of this patent
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Abstract
An improved internal diameter milling machine for centering and milling valve seats in internal combustion engines and the like. An hydropneumatic system suspends a hemispherical guide or bearing concentric to the headstock-screw lead screw of the inventive milling machine. This suspension allows the lead screw and attached cutting tool to move in a pendular manner in response to 90° horizontal movements of the work piece. The pendular motion results in the rapid cutting of a smooth and concentric valve seat within about two minutes in a virtually automatic manner.
Claims7
A Centering and Fastening Device, that can be applied to milling and/or similar machines, that can be installed between a headstock-lead screw and an inferior fastening platen CHARACTERIZED by a system that suspends a hemispherical guide in relation to a hemispherical concavity to enable a pendular motion of the headstock-lead screw, and an inferior fastening floating platen to attach and move a work piece to be milled.
A centering and fastening device comprising:
- a headstock-lead screw;
- a hemisphere surrounding and attached to said lead screw;
- a concave hemispherical surface upon which the hemisphere rests;
- and
- a suspension system for suspending said hemisphere for essentially friction-free rotation and pendular motion in relation to the concave hemispherical surface.
A method for machining a concentric circular valve seat comprising the steps of:
- providing a milling machine having a lead screw supported by a hemispherical guide suspension system that enables pendular motion of the lead screw;
- moving a work piece so that the lead screw is located on a central axis of a valve seat to be cut;
- activating the suspension system to enable pendular motion of the lead screw;
- and
- moving the work piece in mutually perpendicular horizontal 11 directions, thereby causing pendular motion of the lead screw and resulting in cutting a circular valve seat concentric to the central axis.
Dependencies are inferred from the claim text.