Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1980-07-09
1983-03-01
Whitehead, Harold D.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51 80A, B24B 910
Patent
active
043751415
ABSTRACT:
Apparatus for quickly and efficiently beveling the edges of a workpiece such as a sheet of glass having at least two pairs of parallel sides, generally a square, without manual intervention during the process. The workpiece is positioned on a conveyor with the first pair of parallel sides parallel to the direction in which the conveyor moves the workpiece. Guides are provided for maintaining the angular orientation of the workpiece. The workpiece is conveyed sequentially through: a first grinding apparatus which grinds the first pair of parallel edges; a first turntable which rotates the workpiece through a precisely controlled angle to position the second pair of sides parallel to the direction of transport; a second grinding apparatus which grinds the second pair of parallel edges; a first polishing station which polishes the second pair of edges; a second turntable which rotates the workpiece through a precisely controlled angle so that the first pair of edges is again parallel to the direction of transport; and a second polishing station which polishes the first pair of edges. Coolants, lubricants, and polish are sprayed on the workpiece as necessary. The position of the grinders and polishers with respect to the conveyor are adjustable such that the angle and depth at which the workpiece edges are ground and polished can be selected. In addition, these adjustments permit compensation for wear of the grinding wheels and polishing wheels. The polishers further include ammeters connected to their motors which indirectly measure the pressure exerted on the workpiece by the polishing wheel. The turntables are pneumatically operated so as to lift the workpiece from the conveyor, rotate the workpiece through a precisely controllable angle, and return the workpiece to the conveyor in a short period of time. Other configurations of grinders, polishers, and turntables are also contemplated.
REFERENCES:
patent: 1950758 (1934-03-01), Sommer
patent: 2170687 (1939-08-01), Johnson
patent: 3274736 (1966-09-01), Brokaw
Hoyne Industries, Inc.
Whitehead Harold D.
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