組合機床相關畢業(yè)設計的中英文翻譯--對組合機床滑臺動態(tài)性能的調(diào)查報告(參考版)
2025-05-16 19:22本頁面
【正文】 Hydraulics , 1987 GuangZhou, China, (in Chinese). 。 142 the bottom diameter of spool of the SABP valve is increased from 10 mm to 13 mm length of side of triangular damping slot is decreased from 1 mm to the slide unites impact quantity can be reduced by 30%, and the time of dynamic response is shortened. In addition, slide unit39。s motion stability, it is necessary to raise the system rigidity. However, main remendation lies in decreasing the volume of oil. It is known from system structure that, there is a lot of oilcontaining volume between the rod chamber and drain pipe as shown in . Because the volume exists, not only the effect of SABP valve is delayed and reduced, hut also the rigidity of the system is decreased. Therefore, it is hindered to further improve the impact and motion stability. To make the slide unit dynamics better, the structural dimensions of cyli nder39。s vanishing。s and the differences between them are very small. The reason for this is that the variation of the load is not targe, there the pressures in chambers vary very little that is, the effect of the SABP valve is not obvious. IMPROVEMENT It is shown by studying, that dynamics of slide unit which used SABP speed control system as driving system is better than that of traditional system. To reduce the slide unit39。s. It is thus clear that slide unit with SABP system for driving has a good performance in restraining the impact and SABP valve plays an important part in that, MOTION STABILITY When load acting on slide unit varies periodically, such as the situation of milling, slide unit39。s discharging rapidly. During the process of oil pressure converting from high to low, the system absorbs some of the energy, so slide unit impacts forward with high speed. And then the oil in rod chamber is 141 pressed to increase back pressure, some of the energy is consumed, which plays a part of restraining the impact of the slide unit. It must be noted that inlet pressure of SABP valve telys on the interaction of pressures of two chambers, and increases rapidly at the instant of load39。s impact phenominon results from load39。 and is shown in . Half arrow in each bond indicates a direction of power How, two variahles of power are effort variable and flow variable. Ojunction illustrates algebraic summation of flow variables at mon effort, . parallel connection, 1junction does algebraic summation of effort variables at mon flow, . series connection. The symbol TF represents power transformer between two types of energy, and transforming modulus between efforts or flows is noted below the symbol TF. Short transverse bar across one end of each bond shows causality between two variables. A full arrow expresses a control action. Among three actions, there is an integration or differential form in capacitive effect and inertia effect between two variables. So state equation may be derived from , there are nine state vari
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