Gear-shaped tool and method of generating gears
AssigneeThe Gleason Works
InventorThomas B. Ryan
Life of this patent
Estimating the term…
Abstract
A gear-shaped tool (30) having stock removing surfaces (38) is rotated together with a bevel or hypoid work gear (32) in accordance with their respective number of teeth, and the gear-shaped tool 30 is also moved relative to the work gear (32) in the manner of a theoretical generating gear (46) rolling through mesh with the work gear (32) for generating desired tooth surfaces (40) in the work gear (32). Generating motions of between the gear-shaped tool (30) and work gear (32) may be controlled independently of indexing motions of the gear-shaped tool (30) and work gear (32) to improve performance of a gear finishing operation.
Claims21
A method of finishing tooth surfaces in bevel and hypoid gears using a gear-shaped tool abrasive having stock-removing tooth surfaces comprising the steps of:
- imparting relative rotation between said gear-shaped tool and a work gear about their respective axis in a timed relationship according to their respective tooth numbers;
- and superimposing relative motion between said gear-shaped tool and said work gear for generating desired tooth surfaces of said work gear in the manner of said work gear rolling in mesh with a theoretical generating gear which departs from requirements of a basic member defined by said relative rotation of the gear-shaped tool and work gear about their respective axes.
A method of generating tooth surfaces in bevel and hypoid gears comprising the steps of:
- mounting a gear-shaped tool having stock-removing tooth surfaces for rotation about its axis;
- mounting a work gear for rotation about its axis;
- rotating said gear-shaped tool and said work gear about their respective axes in a timed relationship in accordance with their respective tooth numbers;
- moving said gear-shaped tool and work gear into contact with each other in a relative position at which their respective axes are offset from one another;
- relatively rotating said gear-shaped tool with respect to said work gear about an axis angularly related to said respective axes of the tool and work gear in a timed relationship with a supplemental relative rotation between said gear-shaped tool and said work gear about their respective axes;
- and
- relatively translating said gear-shaped tool with respect to said work gear in a timed relationship with said supplemental relative rotation between the gear-shaped tool and work gear about their respective axes.
A gear-shaped tool for finishing desired tooth surfaces in bevel and hypoid work gears comprising an axis of rotation and abrasive stock-removing tooth surfaces defined conjugate to tooth surfaces of a theoretical generating gear having complementary surfaces conjugate to said desired surfaces in said work gear;
- said theoretical generating gear departing from requirements of a basic member between said gear-shaped tool and said work gear.
A method of making a gear-shaped tool for finishing tooth surfaces in bevel and hypoid gears comprising the steps of:
- arranging desired tooth surfaces of a work gear to perform a stock removing function;
- imparting relative rotation between said work gear and said gear-shaped tool about their respective axes in a timed relationship according to their respective tooth numbers;
- superimposing relative motion between said work gear and said gear-shaped tool for generating desired tooth surfaces of said gear-shaped tool in the manner of said gear-shaped tool rolling in mesh with a theoretical generating gear which departs from requirements of a basic member defined by said relative rotation of the work gear and gear-shaped tool about their respective axes;
- and
- arranging said desired surfaces of the gear-shaped tool to perform a stock removing function.
Dependencies are inferred from the claim text.