método de produção de uma chapa de liga de alumìnio para mancais.

摘要

A method of making an aluminum alloy plate for bearing which is made by cladding a bonding layer including a pure aluminum or an aluminum alloy excluding Sn onto a bearing alloy layer including an aluminum alloy containing Sn. The method includes the steps of fitting a concave portion of a first roll (23) in a convex portion of a second roll (24), the first roll (23) having both axial ends with large diameter portions (23b) respectively, the second roll (24) having both axial ends with small diameter portions (24b) respectively, and passing superposed plates formed into the bearing alloy layer and the bonding layer respectively through a roll gap defined between the concave and convex portions and closed by the large diameter portions (23b) of the first roll (23) so that the plates are rolled down at a reduction ratio not less than 50% while both widthwise ends of each plate is restricted by the large diameter portions (23b) of the first roll (23) respectively such that the bonding layer is cladded onto the bearing alloy layer.