Lu Gelu’s life is Lu Qinxin! , Liu Hong 2 (1. Huzhou Urban Planning and Design Institute, Huzhou 313000, Zhejiang; 2. College of Mechanical and Electrical Engineering, Zhejiang University of Technology, Hangzhou 310014, China) 1 Introduction The application of computer-aided design promotes the improvement of enterprise design level and shortens product development. The cycle has strengthened design capabilities. But at the same time, it also puts forward higher requirements for computer-aided technology, that is, not only computer-aided drawing, but also assisted analysis and calculation to achieve true product innovation design.
The performance analysis and calculation of the product can be realized by means of CAE computer aided engineering analysis. CAE is the use of computer numerical analysis to analyze the calculation of the strength, stiffness, dynamic performance and dynamic response of the product. The popularity of computer-aided design and auxiliary manufacturing technology provides a guarantee for computer-aided engineering analysis and simulation of mechanical products and equipment. Analytical simulation is an effective means of product and equipment performance design is the premise and important guarantee of innovative design.
Grinding is not only a precision machining method, but also an efficient machining method. The grinding process is a very complicated process. There are many influencing factors in the grinding process, so it has been a hot topic in grinding research for many years. Analytical research on the grinding process is essential to improve productivity, product quality and precision. As an important equipment for grinding, the design of the grinding machine involves many calculations and assembly performance, processing performance, dynamic performance of the structural system, etc., especially for the design of the grinding spindle and its mechanical performance analysis. . The analysis of these properties and the calculation of the parameters are difficult to accurately form by hand (in the past, it was generally calculated by hand approximation. The parameters have the circumferential position of the abrasive grain L radial position "4 and the radius of the fillet of the abrasive grain n. In general, the shape of the abrasive grains is extremely inconsistent, but an idealized shape can be approximated, such as by statistical means, which can be of the following types: a conical shape with a rounded tip; a flat-top conical shape (this is an abrasive grain) The shape after the end is worn).
These types can be approximated by different values ​​of the fillet radius n, so a single abrasive collision model of a workpiece without loss of generality can be described by three parameters and n.
At any time, the collision kinetic energy of the grinding wheel and the workpiece is the sum of the collision kinetic energy of each abrasive grain on the contact surface between the grinding wheel and the workpiece at that moment. Through the grinding wheel geomorphology map, the grinding wheel-workpiece contact length, the total number of abrasive grains on the contact surface is determined, and then the collision kinetic energy of each abrasive grain and the workpiece is calculated. It is obvious that the collision kinetic energy at the time of the sea is different, that is, the dynamic load that the main shaft bears varies with time. The flow chart for the entire calculation is as follows (see).
Since the abrasive grains of the grinding wheel change during the grinding process, that is, the grinding wheel topography changes, the impact kinetic energy of the grinding wheel-workpiece will change.
However, approximating the dynamic load and response of the grinding machine spindle based on the initial wheel profile map is necessary for the design.
4 Conclusions This paper studies the analysis and simulation of the design of the grinding spindle. A useful discussion of the design of the grinding spindle, especially the performance analysis, is very helpful. (Editing Hao Tian) design.
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