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With the increase of service time, the dynamic precision of high-speed precision press is getting lower and lower. In order to study the precision degradation mechanism, a dynamic model of main transmission system of high-speed precision press was established based on ADAMS, and the influence of different bearing clearance on the dynamic precision was studied. The simulation results show that the dynamic precision of bottom dead center (BDC) decreases with the increase of joint clearance. And the increase of the joint clearance between main linkage and main slider has the greatest impact on the dynamic accuracy of BDC, the impact of the joint clearance between crankshaft and major linkage is smaller, and the impact of the joint clearance between crank shaft and bearing is the smallest. Finally, the field test was carried out. The analysis of the test data shows that the wear of the bearings in the main drive system leads to the increase of the clearance, which leads to the degradation of the dynamic precision.

Analysis on dynamic precision degradation mechanism of high-speed precision press