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    Method of joining sheets of rigid deformable material
    1.
    发明授权
    Method of joining sheets of rigid deformable material 失效
    刚性材料接合片的方法

    公开(公告)号：US3579809A

    公开(公告)日：1971-05-25

    申请号：US3579809D

    申请日：1968-12-13

    Applicant: FRANTZ MFG CO

    Inventor： WOLF CECIL R ,  HOLLAND JOHN P

    IPC: B21D39/03 ,  F16B5/04 ,  F16B17/00 ,  B21D39/00 ,  B23P11/00

    CPC classification number: B21D39/031 ,  F16B5/045 ,  F16B17/008 ,  Y10T29/49915 ,  Y10T29/49938 ,  Y10T403/4991

    Abstract: A method of securing together, as by staking, superimposed strips or sheets of rigid yet deformable material, such as mild steel, having generally planar surfaces. The method includes positioning the superimposed sheets between a driven punch and the working face of a stationary anvil upon sheet-supporting members resiliently urged toward each other mounted laterally of said anvil and providing with said punch and anvil a forming space extending directly as well as laterally above, and laterally below, the anvil working face. By a single stroke of said punch, the punch causes a flow of the material of the strips into the forming space to form therein telescoped hollow bosses, or rivets, with a lower wall portion of the inner boss expanded laterally into interlocking engagement with the corresponding laterally confined wall portion of the outer boss and with the material of the lower transverse end of the outer boss yieldably restrained by said resiliently urged members to a predetermined degree of lateral expansion yet free to flow into the portion of the forming space laterally below said anvil working face to provide downwardly extending lateral flanges. The punch is preferably formed with a pair of opposed lower downwardly converging surfaces and with an intermediate pair of parallel surfaces which together define a generally rectangular striking end, the face of which is arcuate. With this configuration, the striking end of the punch forms hollow bosses that interlock in one plane including the common axis of the bosses, but that are noninterlocking in a plane normal to the first and also including the common axis.

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