Grindstone clearance correcting device for spring grinding machine
OwnerWatanabe Shigeruinventor
Life of this patent
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Abstract
A grindstone clearance correcting device for spring grinding machine comprises a drive unit for driving a pair of grindstones for grinding both ends of a coil spring in a direction perpendicular to flat surface of a work table, and an extra length spring detecting unit for detecting an extra length spring whose grinding allowance is not removed due to the abrasion of the pair of grindstones, whereby the pair of grindstones are shifted by the driving unit in a predetermined quantity in a direction where the grindstones approach mutually.
Claims2
A spring grinding machine having a grindstone clearance correcting means, comprising:
- a work table rotatably mounted for rotation in a predetermined direction and having a plurality of spring holding holes at equal intervals along the faces of the table concentric to the axis of rotation thereof for holding the coil springs to be ground;
- at least one pair of grindstones for grinding coil springs disposed on opposite sides of the work table opposed to the path along which the spring holding holes move during rotation of said work table;
- a grindstone clearance adjusting unit connected to said grindstones for driving the pair of grindstones toward each other in increments of a predetermined amount;
- a spring length detecting unit disposed after the grindstones in the direction of rotation of the work table for detecting extra long springs in the spring holding holes which are longer than a predetermined length and outputting a signal each time an extra long spring is detected;
- and
- means connected between said spring length detecting means and said grindstone clearance adjusting unit for supplying an actuating signal to said grindstone clearance adjusting unit only after a predetermined number of signals have been received from said spring length detecting unit in a predetermined time.
A spring grinding machine having a grindstone clearance correcting correcting means, comprising:
- a work table rotatably mounted for rotation in a predetermined direction and having a plurality of spring holding holes at equal intervals along the faces of the table concentric to the axis of rotation thereof for holding the coil springs to be ground;
- a pair of rough grinding grindstones for rough grinding coil springs disposed on opposite sides of the work table opposed to the path along which the spring holding holes move during rotation of said work table, and a pair of finish grinding grindstones for finish grinding the rough ground coil springs disposed on opposite sides of the work table opposed to the path along which the spring holding holes move during rotation of said work table, and spaced from said rough grinding grindstones in the direction of rotation of said work table;
- two grindstone clearance adjusting units, one connected to each of said pairs of grindstones for driving the respective pairs of grindstones toward each other in increments of a predetermined amount;
- two spring length detecting units, one disposed after each of the respective pairs of grindstones in the direction of rotation of the work table for detecting extra long springs in the spring holding holes which are longer than a predetermined length and outputting a signal each time an extra long spring is detected;
- and
- two adjusting unit control means, one connected between each of the respective spring length detecting means and the corresponding grindstone clearance adjusting unit for supplying an actuating signal to the corresponding grindstone clearance adjusting unit only after a predetermined number of signals have been received from the corresponding spring length detecting unit in a predetermined time.
Dependencies are inferred from the claim text.