XU Yanshen

Bio: XU Yanshen is an academic researcher. The author has contributed to research in topics: Machine tool. The author has an hindex of 1, co-authored 1 publications receiving 6 citations.

Research of dynamic design of machine tools bed structures based on optimization unit structures and frames

Abstract: The concepts of unit structures and basic frames for design of NC machine tools main components are given. The unit of grids formed by the rib walls of machine tools bed is named rib box, and the shape of machine tools bed is named basic frame. The dynamic characteristic of rib box directly effects dynamic characteristic of machine tools bed. When optimal aim is the natural frequency of rib box and design variables are respectively the length of rib box edges, the thickness of rib walls and the diameter of sand hole,by FEA, the graphs of the natural frequency of rib box can be got correspondingly. By FEA, it is found that when the height of bed is closed to the width of bed, the bed has good dynamic characteristic. By studying the dynamic characteristic of simplified machine tools bed with FEA, some useful laws in respect of dynamic optimal design of machine tools bed structures are obtained, and these laws can be used in primary design of NC machine tools bed structures.

Optimal design approach for eco-efficient machine tool bed

Abstract: An optimal design approach of machine tool bed with the aim of obtaining an eco-efficient machine structure is studied. The suggested method includes three phases. The first is the layout design optimization of stiffener plates inside bed. In order to improve the design efficiency, a simplified design model called fiber model is suggested, and the layout of the stiffener plates inside bed is optimized by changing a 3-dimensional topology design optimization problem to a 2-dimensional problem. The second is the detailed sizing optimization of stiffener plates and supporting blocks under the structure based on the initial optimal model resulted from phase one. Finally, a topology design optimization process is implemented to obtain a reasonable distribution of manufacturing holes in bed structure. By considering the manufacturing requirement, an optimal bed structure is obtained. The validity of the suggested method is confirmed by a typical cylindrical grinding machine tool bed, and the result shows that the suggested method is effective, and the optimal structure has much better mechanical and economical performance by comparing with the original structures.

Dynamic analysis on and optimized design of the BED structure of CNC machine

Abstract: The dynamic characteristics of bed structure is a key factor in product performance, so to study how to improve the dynamic performance has profound significance to the development of machine tool. The simplified finite element modal is established with ANSYS aiming to study the machine tool bed, and the first 6-order natural frequencies and vibration models are selected to analyze. On the basis of the presented simulation analysis, the changing trend of the natural frequency is studied mainly while the height of bed in different circumstances. And the impact of ribbed plate of the spindle box supporting platform and the chip removal port structure on the dynamic characteristic are studied. With the work, effective solutions will be obtained and machine tool can be designed more effectively resulting in higher workpiece quality and process stability.

Research on Structural Dynamic Optimal Design of NC Internal Grinder

Abstract: Structural dynamics optimal design of key components is basis to reach optimal design of whole machine tool. The method of sensitivity analysis is applied to optimize the arrangement shapes and parameters of the strengthened bars of components. The BP neural networks model of the spindle system is established and corrected based on comparing with the experimental result, and the structure parameters of the spindle are optimized. These technologies will benefit to realize optimal design of whole NC internal grinder and guide dynamic optimal design of other machine tools.