초록 ▼

A variable volume coolant system for delivering liquid coolant to the interface defined between a machine tool and a workpiece to be abraded to a desired size and curvature. A first conduit path is defined between a source of liquid coolant and a nozzle for delivering coolant to the gap defined betw

A variable volume coolant system for delivering liquid coolant to the interface defined between a machine tool and a workpiece to be abraded to a desired size and curvature. A first conduit path is defined between a source of liquid coolant and a nozzle for delivering coolant to the gap defined between the machine tool and the workpiece; a second conduit path is also defined between the source of liquid coolant and the nozzle. A first valve, such as a solenoid valve, controls the flow of liquid coolant through the first conduit path, while a second valve performs the same function for the second conduit path. The first conduit path possesses a greater volume than the second conduit path. By selectively adjusting the first and second valves, a high volume flow of liquid coolant is maintained over most of the machining operation, while a greatly diminished, low volume flow is established toward the completion of the machining operation. The coolant system is always "on", so that some liquid coolant reaches the gap. In summary, the foregoing system functions to vary the volume of coolant delivered to the tool-workpiece interface at different points in time; high volumes of liquid coolant are delivered during high stock removal points in the machining operation, or cycle, and low volumes of coolant are delivered when stock removal is low and the final geometry of the workpiece is being created.

대표청구항 ▼

[ I claim:] [1.] A system for delivering coolant to the working surfaces of a machine tool and a workpiece with eccentric surfaces to be machined to a desired size and shape,(a) said machine tool including a bed, a carriage, means on said carriage adapted to receive and retain the workpiece, said ca

[ I claim:] [1.] A system for delivering coolant to the working surfaces of a machine tool and a workpiece with eccentric surfaces to be machined to a desired size and shape,(a) said machine tool including a bed, a carriage, means on said carriage adapted to receive and retain the workpiece, said carriage being movable in a first direction along said bed,(b) a tool carriage, a machine tool secured to said tool carriage, and drive means mounted on said tool carriage for advancing said tool carriage in a second direction, perpendicular to said first direction, so that said tool contacts said workpiece,(c) motor means on said tool carriage for driving said tool so that said tool abrades said workpiece,(d) a source of liquid coolant, a nozzle for delivering coolant to the gap defined between said machine tool and said workpiece, and conduit means connected between said source and said nozzle,(e) first valve manes for regulating the flow of coolant through said conduit means to deliver a first volume of liquid coolant through said nozzle into said gap during the machine operation,(f) second valve means for regulating the flow of coolant through said conduit means to deliver a second volume of liquid coolant through said nozzle into said gap during the machining operation, and(g) said second valve means being connected in series with a restriction in said conduit means to reduce the volume of coolant flow to a level less than the volume of flow through said first valve means.