本文件内容用于小波降噪，在信号处理方面具有一定作用(n order to improve the axial force of threaded connection of car aluminum alloy hub whose safety and reliability is to be ensured, the mechanical analysis model of conic connection in the tightening process was established to analyze the influence factors of threaded structure design on the axial force increase, elastic-plastic mechanics was researched on conic hole, axial force　wavelet de-nosing)