一郎 森脇

Bio: 一郎 森脇 is an academic researcher. The author has contributed to research in topics: Pressure angle & Machining. The author has an hindex of 2, co-authored 5 publications receiving 15 citations.

Manufacturing method and machining device for face gear wheel

Abstract: PROBLEM TO BE SOLVED: To provide a manufacturing method and machining device for a face gear that can lower the cost of a high-speed and heavy-load speed change gear for a helicopter transmission and the like. SOLUTION: The machining device for a face gear wheel comprises a cutting means for feeding a milling cutter 11A with a straight or near-straight tooth shape in a radial direction of a face gear wheel 3 while adjusting the pressure angle of the face gear wheel 3 to a proper value, and a grinding means for feeding a disklike grinding wheel in a radial direction of the face gear wheel 3 while adjusting the pressure angle of the face gear wheel 3 to a proper value. The cutting and grinding work manufactures the face gear wheel 3.

Face gear set, manufacture of face gear wheel, and machining device thereof

Abstract: PROBLEM TO BE SOLVED: To reduce cost of a speed change device of high speed and high load by executing topological cutting while adjusting so that face gear wheel pressure angle becomes a correct value, by the use of a milling cutter having tooth profile of straight line or similar to a straight line. SOLUTION: In a face gear, a straight tooth profile changing pressure angle at respective positions in the radial direction, a small bow shaped curved tooth profile, or a curved tooth profile curved inside and outside against a reference straight line is formed by topological cutting. When the straight tooth profile or the tooth profile similar to a straight line is manufactured by a face gear machining device 10, a milling cutter having the straight tooth profile or the tooth profile similar to a straight line is used, and cutting is executed so that the pressure angle of the face gear wheel becomes a correct value by adjusting the angle of a C1 axis according to the respective positions of the Z-axis. COPYRIGHT: (C)2000,JPO

Composite gear and torque transmission mechanism

Abstract: PROBLEM TO BE SOLVED: To provide a composite gear and a torque transmission mechanism having features such as high fatigue strength, high heat resistance and high impact resistant unprovided by a conventional resin gear, without impairing quietness and a sliding characteristic. SOLUTION: This composite gear (1) includes an inner peripheral member (2) including a shaft or an installation part (20) to the shaft, an annular core member (3) having a plurality of core teeth (31) corresponding to a gear tooth (11), and a resin surface layer member (4) including a surface tooth part (41) for wrapping and covering the core teeth and covering an outer peripheral part (22) of the core member and the inner peripheral member. The core member is constituted of metal, an alloy or sintered metal, and forms assemblies (2 and 3) by being relatively displaceably fitted in the peripheral direction to the outer peripheral part of the inner peripheral member. Engaging parts (27 and 47) for checking relative displacement in the peripheral direction, are formed in joining parts (26 and 46) between a side surface part (42) of the surface layer member and the inner peripheral member, by injectably molding the surface layer member (4) on its periphery, with the assemblies as an insert material. COPYRIGHT: (C)2011,JPO&INPIT

Skiving cutter and creating method of internal gear

Abstract: PROBLEM TO BE SOLVED: To provide a skiving cutter which can secure a large rake angle to the edge of a blade and improve the intensity and the wear resistance of the edge of the blade; and a creating method of an internal gear using the skiving cutter.SOLUTION: A positive rake angle γ1 and a negative clearance angle θ1 are formed for the edge of a blade 121 in a skiving cutter 11 used for creating an internal gear and the like. Moreover, the skiving cutter 11 is constituted so as to form a reverse tapered shape as a whole.

Processing method and processing device for concave-convex gear

Abstract: Involves a trajectory extraction step (S2) for extracting the relative movement trajectory of the convex teeth pins (12b) of a mating gear (a fixed shaft) (12) in relation to a concave-convex gear (an oscillating gear) (15) when transmitting power between the mating gear (12) and the concave-convex gear (15), and a processing step (S4) for, when processing the concave teeth (15b) of the concave-convex gear in the concave teeth forming surface of a disk-shaped workpiece that is unprocessed with the concave teeth (15b), moving at least either a disk-shaped workpiece or a processing tool in a manner such that the relative movement trajectory of the processing tool in relation to the disk-shaped workpiece matches the relative movement trajectory of the convex teeth pins (12b) in relation to the concave convex gear (15), which was extracted in the trajectory extraction step.

A study on the design of slicing cutter for cycloid gear based on conjugate theory

Abstract: In order to improve the machining precision and efficiency of cycloid gear, a design method of cycloidal slicing cutter is proposed based on the conjugate surface principle. An error-free cutting edge is picked out from the conjugate surface of the cycloid tooth surface. In order to construct a rake face with uniform rake angle, some ideal lines that pass through the points on the cutting edge are constructed according to the definition of working rake angle. The rake face is fitted by these lines using cubic B-spline surface. The flank face is constructed by the ideal cutting edges which would be obtained after cutter resharpening in theory. For this construction, some new conjugate surfaces of the tooth surface are calculated considering that the center distance between workpiece and cutter would decrease after every resharpening. The cutting edges are designed on these conjugate surfaces. The flank face is fitted by these cutting edges using cubic B-spline surface. At last, the feasibility of this design method is verified by a design example, machining simulation, and machining test.

Method for grinding face gear by formed grinding wheel

Abstract: The invention provides a method for grinding a face gear by a formed grinding wheel The face gear 1, a plate grinding wheel 2 and a straight gear 3 as well as a diamond pen 4 and a saucer grinding wheel 5 which are used for finishing a worm are adopted in the method The method is characterized in that during the machining process, the face gear 1 rotates around Z-f, and the plate grinding wheel 2 rotates around an axis Zw thereof at a constant rotating speed and swings around an axis of a gear shaper cutter 3 at the same time; every time when the plate grinding wheel swings at an angle, the plate grinding wheel performs back-and-forth feed movement for once along the radial direction of the face gear in a cyclic manner until one complete tooth space is machined; and after one complete tooth space is machined, the face gear performs indexing movement for machining the next tooth space until one complete face gear is machined The method provided by the invention has the beneficial effects that by adopting the existing formed gear grinding wheel and gear grinding equipment, high-precision generation of the tooth surface of the face gear is realized, the effect of high-precision machining of the face gear is achieved, and the comprehensive transmission performance of the face gear is improved

Processing method for concave-convex gear

Abstract: A relative movement trajectory of each convex tooth pin of a mating gear with respect to a concave-convex gear at the time when torque is transmitted between the mating gear and the concave-convex gear (nutation gear) may be expressed by a first linear axis, a second linear axis, a third linear axis, a fourth rotation axis, a fifth rotation axis and a sixth indexing axis. Then, a relative movement trajectory of each convex tooth pin of the mating gear, expressed by the first linear axis, the second linear axis, the third linear axis, the fifth rotation axis and the sixth indexing axis in the case where the fourth rotation axis is brought into coincidence with the sixth indexing axis, is calculated, and at least one of a disc-shaped workpiece and a working tool is moved on the basis of the calculated relative movement trajectory.

Method for manufacturing screw-shaped tool

Abstract: A method for manufacturing a screw-shaped tool for grinding a face gear with high precision. The tool is formed in such a manner that the diameter thereof gradually increases from an axial end to an intermediate section in the axial direction, and is used for cutting a face gear. The method includes setting up, on the basis of a prescribed pinion which is to mesh with the face gear to be machined, a virtual gear that is to mesh with the prescribed pinion, and has a greater number of teeth than the prescribed pinion; setting up, on the basis of the virtual gear, a virtual inner gear which has the same number of teeth as the virtual gear, said teeth being on the inside; and setting up, on the basis of the virtual inner gear, a screw-shaped grindstone having various elements that are used for cutting the virtual inner gear.