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图 1表示在圆柱体零件外表面上(表面也可以是圆锥形的 )形成外螺纹的示意图 ;图 2为形成与外螺纹同一参数的内螺纹的示意图。图中 t为螺距 ;d1为螺纹内径 ;d2 为螺纹外径 ;dcp为螺纹中径。用金属丝 1在心棒上做成弹簧状螺旋线坯 ,然后将该坯设法 (例如通过图 2 内螺纹形成示意
Figure 1 shows a schematic view of an external thread formed on the outer surface of a cylindrical part (the surface may also be conical); Figure 2 is a schematic view of an internal thread forming the same parameters as the external thread. Figure t for the pitch; d1 for the thread diameter; d2 for the thread diameter; dcp for the thread diameter. A wire rod 1 is used to form a spring-like helical wire blank on the mandrel. The blank is then manipulated (for example, by forming a female thread in FIG. 2