A study of contact state for non-ideal planar surface assembly

Abstract In assembly process, there are various contact states because of the non-ideal surface morphology, which will cause contact stability problems. In this paper, a method of analyzing the contact state and stability of non-ideal planar surface is proposed for the contact stability problem. Based on the representation model of non-ideal planar surface, a Gradual posture adjustment method is developed for the contact points searching. The area ratio coefficient is incorporated to evaluate the assembly stability caused by the contact state of non-ideal planar surfaces. To deal with the poor stability problem such as local contact, new contact point search strategy is conducted to obtain more stable contact state. An example of analyzing the assembly contact state and stability of the non-ideal planar surfaces machined by end milling processes is provided to show the effectiveness of the method.