A method of machining a tooth flank of a gear with a gear machining tool. The method comprises rotating the tool and bringing the tool and the tooth flank into contact. Relative movements are provided between the tool and the gear to traverse the tool across the tooth flank along a path whereby the path produces a tooth flank geometry of a form which, when brought into mesh with a mating tooth flank under no load or light load to form a tooth pair, provides a motion graph curve comprising a sinusoidal portion (62, 89, 91, 90, 63) and a parabolic portion (92).

A toothed workpiece chamfering device having a chamfering head (2) which includes a first axis of rotation (B) for rotation of a first chamfering tool (6) and a second axis of rotation (T) for rotation of a second chamfering tool (8) wherein the first and second chamfering tools are of different types and their respective material removal methods are also different from one another. Preferably, the first and second axes of rotation are not coincident with one another and in a more preferred arrangement, the first tool axis and the second tool axis are arranged perpendicularly to one another.

A rack is made from a plurality of laminated layers. Each layer defines an alignment feature that allows all of the layers to be affixed to a base plate of an aircraft seat assembly and align the teeth of the rack to within five ten-thousandths of an inch. The rack includes a straight portion and a curved portion such that a pinion gear on the aircraft seat assembly can move the aircraft seat assembly along tracks with straight and curved portions.

A method for forming an assembly having a housing and first and second components. The first and second components are movable relative to one another in the housing. The method includes: providing first and second workpieces; moving the first and second workpieces relative to one another in a predetermined manner that produces relative sliding contact between the first and second workpieces while performing a superfinishing operation on the first and second workpieces to form the first and second components, respectively, wherein the superfinishing operation does not comprise a lapping operation; and mounting the first and second components in the housing such that the first and second components are engaged to one another and are movable relative to one another in the predetermined manner.

A method for manufacturing a gear includes setting a function f(x) for forming a predetermined tooth profile in a gear, and forming a tooth root and tooth tip using function f(x). Function f(x) is defined so that: a surface shape of the tooth profile from the tooth root to tip has a vertex; a difference between a curvature radius of the surface shape at the tooth root and a radius of an arc or a radius of curvature of a parabola at the root is within a predetermined value; a difference between a curvature radius of the surface shape at the tooth tip and the arc radius or a curvature radius of the parabola at the tip is equal to or greater than a predetermined value; and the surface shape curvature radius at the tip becomes smaller than the arc radius or the parabola curvature radius at the tip.

A method directed to gear cutting tools and gear cutter job consolidation resulting in a single cutter capable of cutting a plurality of different members of a part family. The method comprises a multi-step approach comprising a first step of defining a temporary master. A second step creates a virtual master which is especially well-suited for accommodating the requirements of the jobs in the consolidation variety. A third step determines cutting depths and optimized machine settings for all consolidation jobs using the virtual master.

A method directed to gear cutting tools and gear cutter job consolidation resulting in a single cutter capable of cutting a plurality of different members of a part family. The method comprises a multi-step approach comprising a first step of defining a temporary master. A second step creates a virtual master which is especially well-suited for accommodating the requirements of the jobs in the consolidation variety. A third step determines cutting depths and optimized machine settings for all consolidation jobs using the virtual master.

A gear machining apparatus includes a rough working tool having a plurality of replaceable tool blades attached to a tool main body, such that the tool blades are arranged in a circumferential direction of the tool main body and blade tips of the tool blades are oriented outward in a radial direction of the tool main body, a finish working tool having a plurality of tool blades provided to a tool main body in a similar manner to the rough working tool, and machining controllers control to perform rough and finish machinings on the workpiece, such that the working tools are rotated on center lines in axial directions of the working tools, the workpiece is rotated on a center line in axial direction of the workpiece, and the working tools are relatively moved to the workpiece along the center line in the axial direction of the workpiece.

A gear machining apparatus includes: a hob cutter; at least one processor; and at least one memory having instructions. The instructions, when executed by the at least one processor, cause the gear machining apparatus to perform operations including: performing first chamfering on a first axial end of a gear profile by relatively moving the hob cutter with respect to a workpiece in radial and axial directions of the workpiece; performing, subsequent to the first chamfering, gear profile machining by relatively moving the hob cutter with respect to the workpiece in the axial direction; and performing, subsequent to the gear profile machining, second chamfering on a second axial end of the gear profile by relatively moving the hob cutter with respect to the workpiece in the radial and axial directions.

A method of producing a tooth flank surface on gear teeth by controlled removal of stock material from a work gear with a tool with the work gear and the tool being movable with respect to one another along and/or about a plurality of axes. The tool and work gear are engaged with one another and then moved relative to one another in a generating motion along and/or about the plurality of axes. Stock material is removed from the work gear to produce the tooth surface on the work gear. The generating motion along and/or about the plurality of axes comprises motion along and/or about at least one of the axes with the motion being defined by a function having a first level component and a second level component. The first level component defining a maximum flank form deviation amplitude for each tooth of the work gear, and the second level component defining a modification of the tooth surface of each tooth of the work gear.