Research on High-speed Tool Grinder and Its Dynamic Design
|School||Wuhan University of Technology|
|Course||Mechanical and Electronic Engineering|
|Keywords||High-speed Tool Grinder HSM Complete Machine Tool Structure Design Dynamic Behaviour Mode Analysis|
The high-speed grinding is the current trend in grinding owing to its higher productive efficiency and lower surface roughness. Designing the high-speed tool grinder of good performance is a principal condition.In this paper, the development of High Speed Mechining technology at home and abroad, especially of the high-speed grinding and the advanced methods for designing high-speed tool grinder are introduced, as well as the structural characteristic of the high-speed tool grinder which is quite different from the conventional ones, the technical line for developing the high-speed tool grinder, the structural performance requirement and some points designing its based structure of high rigidity. What’s more, several methods to improve the dynamic behavior of the grinder are presented.The current design method, the modeling of the complete structure and components are required in calculations of static and dynamic behaviour of machine tools by the Finite Element Method. It is a good way to improve it and to optimize the machine tool on structure and to develop new products, which is greatly needed for developing high-speed tool grinder because of its high speed and higher dynamic behaviour requirement. The high-speed tool grinders running at 10, 000rpm are our research object. Firstly, a Finite Element Model of the whole machine is created, and mode analysis of the mechine is carried out, and the natural frequency and modeshapes are obtained. Secondly, for improving its vibration resistance ability, the bed structure must be improved according to the calculation results. Hence an improvement project of bed is put forward. In addition, the effect of the joint parameters on the grinder’s dynamics behavior are also involved in the paper.Aimed at the rigidity improvement of the bed and column, the effects of different structures are analyzed. By studies, it is indicated that better dynamic behavior can be obtained by incresing the number of the ribs for bed and adding wings for column respectively. All these conclusions offer reliable foundations for designing of structures of the high-speed tool grinder.