1、摘摘 要要 面对我国经济近年来的快速发展，机械制造工业的壮大，在国民经济中占重要地位的制 重造业领域得以健康快速的发展。制造装备的改进，使得作为制造工业重要设备的各类机加 工艺装备也有了许多新的变化，尤其是孔加工，其在今天的液压系统的地位越来越重要。 镗床液压系统的设计，除了满足主机在动作和性能方面规定的要求外，还必须符合体积 小、量轻、成本低、效率高、结构简单、工作可靠、使用和维修方便等一些公认的普遍设计 原则。液压系统的设计主要是根据已知的条件，来确定液压工作方案、液压流量、压力和液 压泵及其它元件的设计。 综上所述，完成整个设计过程需要进行一系列艰巨的工作。设计者首先应树立正确的设 计思
2、想，努力掌握先进的科学技术知识和科学的辩证的思想方法。同时，还要坚持理论联系 实际，并在实践中不断总结和积累设计经验，向有关领域的科技工作者和从事生产实践的工 作者学习，不断发展和创新，才能较好地完成机械设计任务。 关键词：关键词：液压缸 ；液压泵； 换向阀 Abstract Faced with Chinas rapid economic development in recent years, mechanical manufacturing industry growth, play a significant role in the national economy was healt
3、hy and rapid development of the field of heavy industry. Improvement of the manufacturing equipment, making various types of machining process as an important equipment manufacturing industry equipment has many new changes, especially the hole, it is becoming more and more important in todays hydrau
4、lic system. Hydraulic system design of boring machine, in addition to meeting the host provided for in action and performance requirements, must also comply with the small volume, light weight, low cost, high efficiency, simple structure, reliable working, convenient operation and maintenance, and other generally recognized principles of universal design. Design of the hydraulic system is based mainly on a known condition, programme of work to determine the hydraulic, hydraulic pumps and hydr
