Study on advanced assembly characteristics of locking with radial anti-loosening precision locked-nut while maintaining the design rigidity under dynamic precision fastening system

Abstract

Abstract The rigidity of the precision fastening system is often reduced due to dynamic vibration after design assembly rigidity. Without an anti-loosening mechanism, it may even be completely loosened in severe cases. It is often used in the advanced assembly of important precision components or important precision transmissions, what is can keep the stable design dynamic rigidity. The relative fixation of the mechanism, due to the reduction of structural rigidity, often leads to problems such as reduced use accuracy, difficulty to grasp the vibration frequency, and reduced service life. In this paper the clamp locking precision locked-nut that is commonly used in precision fastening systems under dislocation vibration. Through the experiment of the forced dislocation vibration environmental factors to discuss the axial force is affected. To achieve the advanced assembly under keeping the stable design dynamic rigidity of the precision fastening system during dynamic use. In this paper, Assembling the clamp locking precision locked-nut on the precision system are simulated of the conditions, and the experimental target axial forces are 3000N, 5000N, and 7000N, respectively. The designed rigidity after forced dislocation vibration under the advanced assembly characteristic equation is achieved. And using various precision instruments is to measure the microscopic shape and geometric changes before and after the experiment. These are including the deflection of the end face of the nut, flatness, thread angle and thread surface roughness, etc. To grasp changes of relevant dynamic characteristics, and the assembly prediction equation of the target axial force is established. The results can be regarded as an important assembly basis for machine tools, automation, precision electronic special machines, aerospace industry, etc., to improve the dynamic accuracy and stability of their related precision fastening systems.