Daido Metal Company Ltd.

Takayosi Sasaki

Sanae Mori

Noriyoshi Ito

Takehiro Ozika

This invention pertains to a method of manufacturing a half-split bearing, comprising the steps of: providing a blank having a width corresponding to a width of a final said half split bearing: first bending opposite ends of the blank by a first punch and die set while restraining a central portion of the blank in a wall-thickness wise direction, the restraining produced by clamping the blank between a restrainer located centrally on the punch of the first punch and die set and the die of said set, thereby forming a partially processed bent blank having first bending; further, bending in a second stage said partially processed bent blank by a second punch and die set beginning at points between the first bendings and said restrained a central portion while continuing to restrain restraining the central portion of the partially processed bent blank in the wall-thickness wise direction, the restraining produced by clamping the partially processed bent blank between a restrainer located centrally on the punch of the second punch and die set and the die of the set, said bending in a second stage forming to form a substantially half-circular blank; reducing a circumferential length of the substantially half-circular blank while restraining the substantially half circular blank in the wall-thickness wise, widthwise and circumferential directions between a third punch and die set, thereby forming a half-split bearing of a predetermined size.

Manufacturing method of half-split bearings

Disclosed is an thickness measuring apparatus comprising: a C-shaped block; a pair of arms which arc provided on the block, each of which is equipped with a pivot section situated at one end thereof, each pivot section being equipped with a spring element; a pair of lever members pivotably mounted on the respective spring elements; measuring elements mounted on the respective outer end sections of the lever members and adapted to be brought into contact with the article to be measured; a first compression spring provided between one of the pair of arms and a section of one of the lever members which is near the inner end thereof so as to bias this lever member; a second compression spring provided between the other of the pair of arms and a section of the other of the lever members which is near the inner end thereof so as to bias this lever member; thickness measuring devices provided respectively on the pair of arms and adapted to detect any movement of the lever members so as to measure the thickness of the article; and a device for driving the inner ends of the lever members such that the outer ends of the lever members are spaced apart from each other.

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Tajimi, Japan

Takayosi Sasaki