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过盈螺纹是通过内,外螺纹配合时,以中径的过盈来固定螺桩的。这种联接形式一般用在钢螺桩拧入轻合金机体中。有的除改变螺纹中径尺寸外,还要依靠螺纹尾扣的作用来达到固定的目的。因此,过盈量的大小直接影响螺桩的装配质量。过盈量过大会使螺桩和螺孔损坏,过小会引起螺纹脱扣或连接松动。所以,合理的控制过盈量是非常重要的。表1是英国罗尔斯·罗伊斯公司规定的过盈量。
Interference thread is through the internal and external thread with the diameter of the interference to fix the screw pile. This form of connection is generally used in screwed steel screw into light alloy body. In addition to changing the thread diameter size, but also rely on the role of the tail screw to achieve a fixed purpose. Therefore, the size of the interference directly affects the quality of the screw pile assembly. Tightening the assembly will make the screw pile and screw hole damaged, too small will lead to thread tripping or loose connection. Therefore, the reasonable control of the amount of interference is very important. Table 1 is the United Kingdom Rolls-Royce company set the amount of interference.