基于靜壓技術的鏜銑床主軸箱設計與分析
[Abstract]:Precision is the main direction of the development of the ground boring and milling machine, the spindle box is one of the most important components of the floor boring and milling machine, the static pressure bearing technology has the advantages of small friction coefficient, high supporting stiffness and vibration absorption, etc. Has been widely used in a variety of large and medium-sized machinery. At present, the static pressure bearing technology is seldom applied to the sliding pillow of the spindle box on the domestic ground boring and milling machine. This subject mainly focuses on the application of static pressure technology on the sliding pillow of the spindle box of the landing boring and milling machine. (1) the support of the sliding pillow has the structural requirements as well as the stress requirement. This subject starts with the principle of the static pressure support. It is proved that the static pressure supporting technology can meet the structural and mechanical requirements of the sliding pillow support, and the constant pressure formula is derived. The relationship between the bearing capacity W and the oil film rigidity J and the effective bearing length l1, width b1, oil film thickness h, capillary length L, oil flow rate Q, and the manufacturing cost of the two kinds of hydrostatic support modes, The manufacturing process and bearing capacity are compared, and the static pressure bearing mode is chosen. (2) according to the design parameters of the spindle box, the spindle box is designed, and the original bearing mode of the sliding pillow is changed from the hard rail support to the static pressure support. Through the analysis of the force and structure of the sliding pillow, the parameters such as the shape of the oil chamber, the position of the oil chamber, the pressure of the oil supply system and the pressure of the oil chamber are designed, and the simple schematic diagram of the oil supply system is drawn. The spindle box with static pressure supporting technology is designed. (3) the dynamic models of spindle assembly and sliding pillow of spindle box are established by using finite element software ANSYS, and the natural frequency and main vibration mode of spindle assembly and sliding pillow are obtained. The critical speed of spindle is calculated. The dynamic stiffness of sliding pillow with hard rail support and hydrostatic support is compared, and it is found that the dynamic stiffness of sliding pillow with static pressure support is improved significantly.
【學位授予單位】:濟南大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:TG536
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