Modeling and Analyzing the Slipping of the Ball Screw

Abstract

This paper aims to set up the ball systematic slipping model and analyze the slipping characteristics caused by different factors for a ball screw operating at high speeds. To investigate the ball screw slipping mechanism, transformed coordinate system should be established firstly. Then it is used to set up mathematical modeling for the ball slipping caused by the three main reasons and the speed of slipping can be calculated. Later, the influence of the contact angle, helix angle and screw diameter for ball screw slipping will be analyzed according to the ball slipping model and slipping speeds equation and the slipping analysis will be obtained. Finally, curve of slipping analysis and that of mechanical efficiency of the ball screw analysis by Lin are compared, which will indirectly verify the correctness of the slipping model. The slipping model and the curve of slipping analysis established in this paper will provide theory basis for reducing slipping and improving the mechanical efficiency of a ball screw operating at high speeds. KeywordsBall screw; slipping; contact angle; helix angle; slipping analysis. Modeling and Analyzing the Slipping of the Ball Screw

Experimental dynamic analysis on naturally curved honeycomb sandwich beams with different damage patterns

“…Including the equivalent stiffnesses of hexagonal honeycomb core, analytical/numerical and experimental solutions for honeycomb skin effect are attempted by many researchers. Xu and Qiao developed a constitutive model for honeycomb sandwiches according to an effective theoretical approach [1]. They concluded that flexural stiffness and stretch stiffness are for the first time distinguished from each other for honeycomb sandwich structures by considering their symmetric and antisymmetric responses.…”