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    • 4. 发明公开
    • GEWINDEFORMER UND WALZBACKEN
    • EP3004665A1
    • 2016-04-13
    • EP14719029.2
    • 2014-04-24
    • Arnold Umformtechnik GmbH & Co. KG
    • WERTHWEIN, BerndJOHANNING, WernerVOGEL, Georg
    • F16B25/00B21H3/02
    • F16B25/0021B21H3/027B21H3/06F16B25/0047F16B25/0084
    • The invention relates to a self-tapping screw comprising a screw shaft (1) and a screw thread (3) as well as a grooved section (4) that proceeds from the front end (2) of the screw and extends across an axial length which approximately corresponds to the nominal dimensions of the screw. A support section of the thread is connected to this grooved section. In the preferably slightly cone-shaped grooved section, the grooves (6) formed between the windings of the thread by the thread flanks are initially designed flatter proceeding from the front screw end and they continually approach, in their form, the steeper cross-sectional shape of the grooves present in the support section. This gradual transition forms a counter thread from the screw, which allows greater loads. The invention likewise suggests a rolling die for producing such a screw, and a thread former.
    • 自攻螺钉技术领域本发明涉及一种自攻螺钉,其包括螺钉轴(1)和螺纹(3)以及从螺钉的前端(2)前进并延伸穿过轴向长度 其大致对应于螺钉的公称尺寸。 螺纹的支撑部分连接到该开槽部分。 在优选稍微呈锥形的凹槽部分中,通过螺纹牙侧在螺纹的绕组之间形成的凹槽(6)最初从前端螺纹端平坦地设计,并且它们以其形式连续地接近较陡的横截面 存在于支撑部分中的凹槽的形状。 这种逐渐过渡形成螺钉的反螺纹,从而允许更大的载荷。 本发明同样提出了一种用于生产这种螺钉的滚压模和一种螺纹成型器。