Honda Motor Co., Ltd.

Daisuke Koshino

Toshiyuki Tanaka

Katsuyuki Nakajima

Satoshi Kaneko

Akihiro Nemoto

Yutaka Takeuchi

Takuro Yoshimura

Yuichi Tomizawa

Shogo Nagayoshi

Nobuhiro Asai

Takahiro Otsuka

Yu Kubodera

Masaharu Kitafuji

Tsuyoshi Kubota

Daisuke Miura

Provided are: an electroplated tool; a screw-shaped grindstone for grinding a gear; a method for manufacturing the electroplated tool; and a method for manufacturing the crew-shaped grindstone for grinding a gear. Said tool having a parent material, a plating layer that has a high-level portion and a low-level portion formed as strips on the parent material at different heights along the direction intersecting the processing direction, and electrodeposited abrasive grains exposed from the surface of the plating layer. The difference in height of the plating layer is preferably 50-100% of the average particle diameter of the abrasive grains, the width of the high-level portion of the plating layer is preferably 150-200% of the average particle diameter of the abrasive grains, and the width of the low-level portion of the plating layer is preferably 100-800% of the average particle diameter of the abrasive grains.

Electroplated tool, screw-shaped grindstone for grinding gear, method for manufacturing electroplated tool, and method for manufacturing screw-shaped grindstone for grinding gear

A crankshaft that can be strengthened in a short time without being subjected to wasteful processing, and that can be strengthened over a wide range. The crankshaft includes a crank pin and a fillet portion of a journal pin. Compressive residual stress is applied to a region on the fillet portion, which extends at almost equal distances to both sides in a circumferential direction from a portion in which the greatest bending load is applied, and a processing depth for applying the compressive residual stress is gradually decreased in a circumferential direction from the center position in which the compressive residual stress is greatest.

Crankshaft and method of strengthening shaft component

A method includes a grinding step of forming the shape of a contact surface, a grooving step of roughening the shaped contact surface to form grooves therein, and a contact surface lapping step of lapping the contact surface having the grooves with a lapping film to form oil grooves for holding a lubricant oil. The surface roughness of the contact surface is such that the maximum height roughness Rz is 4 &#x3bc;m or less, the mean length RSm of the roughness profile elements is 30 to 60 &#x3bc;m, the skewness Rsk of the roughness profile is &#x2212;2.7 to &#x2212;0.6 (no unit), the reduced peak height Rpk is 0.09 &#x3bc;m or less, and the reduced valley depth Rvk is 0.4 to 1.3 &#x3bc;m.

Method for producing pulley for belt-type continuously variable transmission

A rotatable workpiece holder for holding a hollow cylindrical workpiece thereon functions as a chiller for cooling the hollow cylindrical workpiece. A coolant, e.g., water, is supplied to the hollow cylindrical workpiece through second coolant passages and branch passageways defined in the workpiece holder, thereby cooling the hollow cylindrical workpiece. The coolant forms a film in a clearance between the outer surface of an annular side wall of the workpiece holder and the inner circumferential surface of the hollow cylindrical workpiece.

Apparatus and method for cutting hollow cylindrical workpiece

Growing community of inventors

Utsunomiya, Japan

Daisuke Koshino