Abstract: Pins are critical conjunction parts in construction machinery. Wear failure of pins may influence the efficiency and quality, even results in serious damage of construction machinery. Due to the deficiency of design method, pin life in different positions of wheel loader is always different, which greatly influence the maintenance and exchange of pins. A lot of pin samples have been observed to analyze the failure course of pins. It is found that abrasive wear is the main reason of pins failure. The theoretical model of abrasive wear is derived to predict the wear volume. Under the boundary condition of equal wear of pins, a new design methodology for equal life of pins is proposed by the aid of virtual prototyping technology.

Key words: Equal life design, Pin, Virtual prototyping, Wear