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发明公开
CN1340135A 自攻螺钉 失效 - 权利终止

自攻螺钉
摘要：
本发明涉及包括轧制螺纹(4)的自攻螺钉,其中由负载齿侧面(8)和后齿侧面(9)所形成的螺纹的角平分线(15)具有相对于螺钉轴线(6)的垂线(5)的倾斜位置,所述倾斜位置被定位成远离螺钉头(1)。负载齿侧面相对于螺纹根部(11)以直线延伸,后齿侧面从螺纹顶部起始,首先以直线方式延伸,并在其高度的大约1/3处通过弯折部(12)延伸成带有角度(α)的一直的倾斜线。所述角度大于后齿侧面相对垂线的角度(δ)并处在30°到50°的范围内,由此螺纹芯部直径(K)相对螺纹外直径(D)的直径比率大于0.7,而螺距(P)相对螺纹外直径(D)的比率小于0.25。
摘要（英）：

Self-tapping screw with rolled thread turns, on which the angle bisector of the thread turn formed by the load flank and the rear flank slopes away from the screw head at an angle to the perpendicular to the screw axis, the load flank running in a straight line to the thread root, and the rear flank initially extending in a straight line from the thread tip and, at about 1/3 of its height, merging via a kink into a straight angled portion at an angle that is greater than the angle, measured relative to the perpendicular, of the rear flank and is between 30° and 50°, the ratio of the thread's core diameter to the thread's outside diameter being greater than 0.7 and the ratio of the thread pitch to the thread's outside diameter being less than 0.25.

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