The Gleason Works

Other

Harry D Dodd

Harry Pedersen

A grinding process and wheel are disclosed wherein any or all surfaces of a cutting blade may be generated in a continuous grinding operation utilizing a single grinding wheel having a simple profile. A grinding wheel having a grinding profile comprising an inner conical surface and an adjacent outer narrow substantially flat surface is provided. The inner conical surface rough grinds to generate a roughed blade surface and the adjacent outer narrow substantially flat surface finish grinds the roughed surface to generate a finished blade surface. Computer numerical control (CNC) is utilized to control the relative movement of the grinding wheel and cutting blade along or about a plurality of axes. Inner and outer arcuate grinding surfaces may also be provided for rough grinding.

Grinding wheel for cutting blades

Method of grinding the surfaces of cutting blades and grinding wheel

A tool, for dressing both the inside and outside working surfaces of cup-shaped abrasive wheels used for grinding gears, is disclosed along with methods and apparatus for using the tool. The working portion of the dressing tool has a cylindrical shape with an outside surface parallel to its axis of rotation and a top surface extending radially, to the axis of rotation. The apparatus orients the tool relative to the grinding wheel so that only the outer cylindrical surface of the tool is used to dress the inside working surface of the grinding wheel, while only the top surface of the tool is used to dress the outside working surface of the wheel. Formulas are provided for calculating the optimum radius of the cylindrical surface of the tool for providing substantially equal effective relative curvatures between the tool and each of the respective sides of the grinding wheel, thereby resulting in similar grinding characteristics being dressed into both the inside and outside working surfaces of the grinding wheel.

Universal dressing roller and method and apparatus for dressing

A rotary dressing roller of the generating type and a method and apparatus for dressing a substantially cup-shaped grinding wheel for longitudinally curved tooth gears. The rotary dressing roller 40 is provided with a base portion 42 which is rotatable mounted to the dressing motor 38 of a dressing apparatus 15. The dressing apparatus 15 is used to dress a grinding wheel 50. At the other end of base portion 42 there is provided a working portion 44 having an outer concave surface 45, an inner convex surface 46 and an outer cutting rim portion 47. The outer concave surface 45 and inner convex surface 46 of working portion 44 are shaped so as to allow dressing of the inside working surface 52 and outside working surface 54 of grinding wheel 50 by rotation of the rotary dressing roller 40 in a single direction.

Rotary dressing roller and method and apparatus for dressing cup-shaped

A rotary grinding tool having two concentric grinding elements projecting in a common direction from one face of the tool is assembled from basic components which can be easily disassembled to permit accurate profile correction and surface renewal of its active grinding surfaces. In addition, the disassembled components can be used as separate grinding tools.

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Rochester, NY, United States of America

Harry D Dodd