Generating tooth profiles with a cutter having cutting edges which move about a common cutter axis, the workpiece also being rotated about an axis, the workpiece and cutter undergoing relative movement along a path, cutter and workpiece having basic rates of movement about their respective axes, with one of the basic rates being increased or decreased by a differential rate depending upon the rate of said relative movement, so that for each desired tooth profile the cutting edges will make a series of cuts tangent to the desired profile at a succession of lines, the basic rates of movement of the cutting edges and the workpiece about their respective axes having a ratio dependent on the ratio of the number of teeth in the gear to the number of cutting edges so that each edge will make a cut tangent to a desired profile as the latter passes across the path of movement of the respective cutting edge and so that between successive cuts tangent to any one desired profile there intervenes complete revolution of the workpiece.
Method of machining grooves with shape outline by removal of material, more particularly for making gears, characterized in that the feed movement of the tool penetrating into the workpiece is so adjusted that one of the tool flanks penetrates into the workpiece tangentially to the corresponding lateral contour to be obtained in said workpiece, only the opposite flank and the front face of the tool being used for removing material from the workpiece.
A method for determining a conjugated gear tooth contact surface of a gear having a predetermined gear mesh contact area. Also, a method for making a forging die for manufacturing gears having the predetermined gear mesh contact area is disclosed. The method includes the steps of designing the gear having the predetermined gear mesh contact area, designing an electrode for an electric discharge machining using CAD/CAM device, manufacturing the electrode, and manufacturing the forging die employing the electric discharge machining process.
A method for producing a fillet on a gear as a function of a plurality of design criteria points in disclosed. The present method includes the steps of fitting a polynomial curve to the design criteria points, and producing the fillet on the gear, the fillet having a curved shape corresponding to the fitted polynomial curve. As a further step for control of the fillet, the actual shape of the fillet produced can be inspected and compared to the fitted curve, using a coordinate measuring machine or other suitable device. According to a further aspect of the invention, the fillet is produced using a tool having a curved surface corresponding to the polynomial curve.
A method adapted to achieve a high rate of material removal when, for example, milling a cavity into a work piece. The method includes providing for a cutter path in which the angular engagement between the cutter and the work piece is maintained below a predetermined value to prevent premature wear of the tool, providing for a cutter path which permits a constant cutter feed rate including during directional changes in the path, and machining a series of nested pockets into the work piece utilizing cutter paths as provided for above.
