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US 6,581,269 B2Granted
Ring for laminated type metal belt and method for manufacturing same
AssigneeNissan Motor Co., Ltd.
InventorsShinji Someno, Masayuki Suzuki
Life of this patent
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Abstract
A ring for a laminated type metal belt includes: an endless metal ring for configuring a belt by laminating a plurality of the rings. In the structure, the ring is chamfered at each of its inner and outer peripheral corner edges; and the radius of curvature of the chamfered portion of the inner peripheral corner edge of the ring is set to be larger than the radius of curvature of the chamfered portion of the outer peripheral corner edge of the ring.
Claims8
A method to manufacture a ring for a laminated type metal belt, comprising the steps of:
- entraining a wide and endless ring work material between one roll provided with an indentation punch having an angle-shaped edge and another roll to move the ring work material in a circulating manner;
- pressing a pressing roll on to the indentation punch so as to sandwich the ring work material;
- cutting the ring work material by indentation action of the indentation punch to obtain a ring with a predetermined width size so that an inner peripheral corner edge of the ring is formed into a chamfered portion in the cutting step;
- and
- performing a polishing working on an outer peripheral corner edge portion of the ring which has been cut in the cutting step so that an outer peripheral corner edge of the ring is formed into another chamfered portion in the polishing step.
2 more elements
Dependencies are inferred from the claim text.