Static Stiffness Modeling of Parallel Kinematics Machine Tool Joints

Abstract

The possible variants of an original parallel kinematics machine-tool structure are explored in this article. A new Hooke's universal joint design based on needle roller bearings with the ability of a preload setting is proposed. The bearing stiffness modeling is carried out using a variety of methods. The elastic deformation modeling of a Hook’s joint and a spherical rolling joint have been developed to assess the possibility of using these joints in machine tools with parallel kinematics.

Keywords

• : parallel kinematics
• joints
• milling machine-tool
• stiffness
• FEM analyses.