Honda Giken Kogyo Kabushiki Kaisha

Haruki Kodama

Hideaki Ikeda

Masayoshi Kai

Hideshi Sato

Shiro Naito

Takeshi Sasaki

Setsumi Hatanaka

Fumio Hirai

Toshikazu Murakami

Noboru Miyao

Yasutaka Matsue

Takao Shinohara

Tomonori Fukumoto

A cylinder liner has an outer circumferential surface around which another metal is to be cast. The cylinder liner also has a plurality of protrusions disposed on the outer circumferential surface and having respective substantially conical undercuts or necks which are progressively spread outwardly from the outer circumferential surface. The protrusions have respective flat faces on the distal ends of the undercuts.

Cast-iron insert and method of manufacturing same

A centrifugal casting apparatus has a workpiece withdrawal mechanism, a cleaning mechanism, and a facing material applying mechanism which are disposed parallel to each other on an axial side of a centrifugal casting mold, a unit drive mechanism for moving the workpiece withdrawal mechanism, the cleaning mechanism, and the facing material applying mechanism in unison with each other in the direction indicated by the arrow B across the axial direction indicated by the arrow A, and a pouring mechanism disposed in an opposite axial side of the centrifugal casting mold.

Centrifugal casting equipment

An integral cast-iron connecting rod blank having a smaller-diameter end, a shank, and a larger-diameter end with a crank opening is set on an inclined base, and the tip end of a laser beam applying device is positioned in the larger-diameter end. While a YAG laser beam from the laser beam applying device is being applied to diametrically opposite inner central wall regions of the larger-diameter end, the laser beam applying device is moved to form notches transversely in the respective inner central wall regions. Two spreading elements are placed in the crank opening, and then a tapered wedge is inserted downwardly between the spreading elements. A downward impact point load is applied to a load bearing surface of the wedge thereby to apply spreading forces to the larger-diameter end. A crack starting radially outwardly from the notches is developed in the larger-diameter end, dividing the larger-diameter end into a saddle and a cap. Mating surfaces of the saddle and the cap have interfitting surface irregularities which prevent the saddle and the cap from being combined in wrong orientations. Before the larger-diameter end is split open, the crank opening is finished for roundness while the larger-diameter end is being subjected to the same load as a fastening load by which the saddle and the cap will be fastened by bolts.

Method of manufacturing connecting rod

Growing community of inventors

Imaichi, Japan

Haruki Kodama