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    • 83. 发明专利
    • LONG MATERIAL FOR LEAF SPRING
    • JPS55152936A
    • 1980-11-28
    • JP5781579
    • 1979-05-11
    • NHK SPRING CO LTD
    • SHIGUMA HEIJIROUOONO AKIRA
    • F16F1/18
    • PURPOSE:To simplify manufacturing process by forming material into continuous spring unit form, in manfucturing long material for leaf spring, and incorporating different kind of spring unit so that the continuous length of the unit corresponds to the length of the material. CONSTITUTION:The material such as ingot is heated and rolled. In this rolling process, the material for leaf spring having the conventional and fixed form of section is obtained, and also the rolling process corresponding to the form of spring unit is performed. The latter rolling process means the rolling process for taper- rolling of 5b and 6b shown on the long material 4. Through this process, the long material for leaf spring which consists of the continuation of a variety of spring unit forms 5-7 can be obtained. In the material 5a of each spring unit 5, 6 is the circular impeller eye part, 5c is the installation part, 6a is the impeller eye part in elliptic form or military form, and 6c is the installation part in the final stage.
    • 84. 发明专利
    • ELONGATED STRIP FOR SPRING
    • JPS55142135A
    • 1980-11-06
    • JP5073579
    • 1979-04-24
    • NHK SPRING CO LTD
    • SHIGUMA HEIJIROUOONO AKIRA
    • F16F1/18
    • PURPOSE:To make the control or management in manufacturing steps and parts storage period of springs, by forming each spring with an elongated strip including at least two continuous spring units of different configurations and combining said spring units to form at least one juxtaposed leaf spring assembly. CONSTITUTION:An elongated sprip 3 for springs is formed of continually disposed units a1, b1, c1 corresponding respectively to No.1 leaf (a), No.2 leaf (b), and No.3 leaf (c). Portions a11, a12, a13, b11, b12, b13, c11 and c12 are so formed as to constitute a circular end portion, tapered portion, attachment portion, end portion of an ellipse or bugle shape, a tapered portion, attachment portion, tapered portion, and attachment portion respectively. Said strip 3 is cut into units a1, b1 and c1, heated, formed with circular end portions, hardened, and assembled into a juxtaposed leaf spring assembly. In the above way, it is possible to simplify the manufacturing process of leaf spring units and the storage of their parts and also to reduce accidental shortage of stored parts. It is sufficient to use a single line of manufacturing facilities, thereby facilitating maintenance work and unifying the quality of products.