Screw thread tap grinding with automatic loading means

Details Screw thread tap grinding with automatic loading means Screw thread tap grinding with automatic loading means

1976-11-23

1978-02-28

Whitehead, Harold D.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51215H, B24B 318

Patent

active

040757900

ABSTRACT:
Tap grinding apparatus is provided consisting firstly of a support or cradle mountable in a grinding machine in relation to a thread grinding wheel of the latter for relative traverse of said support and grinding wheel, the support having headstock and tailstock centers for rotatably receiving a tap workpiece whereby the latter is mounted in relation to a said grinding wheel, at least one of said centers being operable for axial retraction relative to the other for obtaining release and discharge of a ground tap workpiece from between the centers. Secondly automatic loading means is provided consisting of a magazine for receiving uniformly arranged tap workpieces to be ground for sliding feed movement there-along to a lifter member, a transfer holder being provided having a spring latch for receiving and holding a tap workpiece raised therein by the lifter member. The transfer holder is operable for operative movement and return in order to position and release the tap workpiece to be ground between the centers for holding thereby on relative axial return movement of the centers, the spring latch riding over the workpiece between the centers on the return movement of the transfer holder.

REFERENCES:
patent: 1709617 (1929-04-01), Hanson
patent: 2060438 (1936-11-01), Harley
patent: 2388064 (1945-10-01), Markus
patent: 2692535 (1954-10-01), Praeg
patent: 3110132 (1963-11-01), Bassoff
patent: 3665656 (1972-05-01), Newsome
patent: 3863402 (1975-02-01), Price

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