愛三 久保

Bio: 愛三 久保 is an academic researcher. The author has contributed to research in topics: Pressure angle & Machining. The author has an hindex of 3, co-authored 3 publications receiving 17 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

Non-contact measuring method for surface shape of gear

Abstract: PURPOSE: To accurately measure an asymmetrical gear surface shape without contact by using the simulation interference fringe image of a gear surface obtained based on gear specifications registered in a computer in advance as the image of a reference gear surface and comparing it with the gear surface interference fringe image to be measured. CONSTITUTION: A measurement mechanism 4 is inclined to a state of matching with the twisted angle of a gear 7 to be measured and the beams of object light are radiated along the created bust of the gear. After setting a zero-point position according to a simulation program, either left or right gear surface is selected, an optical measuring probe 25 is moved to a specific position at the time of photographing the gear surface and the measurement mechanism 4 is moved to a position specified by the measurement programs, thus causing the gear surface with interference fringes to appear on a camera 10. A phase- shifting device is driven by a command from a computer, and a mirror 27a is finely moved by 1/n of the wavelength each, thus reading the data for one pitch of the fringes and thus measuring the gear surface shape to be measured with the simulation image of the gear surface by the computer as a reference surface without any contact. COPYRIGHT: (C)1997,JPO

Image radar device

Abstract: PROBLEM TO BE SOLVED: To obtain an image radar device whose resolution of a reproduced image is improved by improving phase compensation accuracy.SOLUTION: A radar observation device acquires a range history by repeatedly executing acquisition processing of range profiles while changing relative positional relation with a target. A radar imaging device includes: a range compensator 12; an unnecessary phase change estimator 21 which investigates phase change of a plurality of representative reflection points on a range history S1 (r,h) after range compensation by the range compensator 12 to estimate a value of secondary or more unnecessary phase change to a hit to be a cause of blurring in the Doppler frequency direction of the radar image within a range of hit width to be finally used for cross range compression; and a phase compensation circuit 22 which compensates unnecessary phase change components included in a range history segmented for the hit width to be finally used for the cross range compression from the range history S1 (r,h) after the range compensation based on the unnecessary phase change φ2(h) obtained by the unnecessary phase change estimator 21.

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.

Tooth aligning device for the aligning of workpiece with pre-cut teeth on gear finishing machines

Abstract: The invention concerns a device for the non-contact measurement of the position of the teeth ( 13 ) of a workpiece ( 14 ) with precut teeth on a gear finishing machine. The measuring probe, retractable from the measuring position into a position of rest protected against soiling, is arranged in a holder ( 5 ) for radial and axial adjustment relative to the workpiece, the said holder ( 5 ) being a kinematic member of a parallelogram linkage (A) and by means of a hydraulic, pneumatic or electromechanical swivel drive ( 11 ) is swivellable from stop to stop between measuring position and position of rest in a plane containing the workpiece axis, such that in the advancement action from the lower end position to the top end position motions of the measuring probe ( 1 ) tangential to the workpiece circumference are completely avoided. The parallelogram kinematics moreover afford adequate protection against swarf and grinding dust, and lends the device a high stiffness and reliability.

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.