WEW—300型屏显液压式万能试验机液压系统的设计_本科毕业设计(论文).doc

本科毕业设计(论文) 题目：WEW—300型屏显液压式万能试验机 液压系统的设计 教学单位： 机电工程系 专 业： 机械设计制造及其自动化 指导教师： 2012年 5月  摘 要 万能试验机从最简单的砝码加荷到以数字化技术为特征的各种材料试验机。在国外已有二百多年历史。试验机制造业已成为一个独立的行业。试验机技术也成为一个国家工业发展水平的标志。 我国在短短四十多年里,从无到有建立了完备的试验机制造工业。正在努力接近世界先进水平。但受到工业发展水平的限制,作为材料试验机中最基础的万能材料试验机.从五十年代开始生产.目前虽然有较大变化。但仍有产品停留在杠杆摆锤测力系统的水平。已是电子信息时代.计算机已广泛地应用于各种行业。旧试验机的测量系统不能满足新标准的要求。因而将计算机应用于试验机技术已成为。配上合适的夹具，也可做混凝土、砖石等非金属材料的抗压试验，是科研单位、冶金和机械制造厂、质检站和大专院校的必备设备。Universal testing machine loading from the simplest weight to digital technology is characterized by a variety of materials testing machine. In a foreign country more than 200 years ago. Testing machine manufacturing industry has become an independent industry.Testing machine technology has become the flag of a countrys level of industrial development. China in just forty years, from scratch establishment of a comprehensive test machine manufacturing industry. Are trying to close to the world advanced level. But is limited by the level of industrial development, production began in the 1950s as the most basic material testing machine universal testing machine. Although there are significant changes. But still remain in the level of the the Gearing pendulum dynamometer system. The 21st century is the era of electronic information the computer has been widely used in various industries. Old test machine measuring system can not meet the requirements of the new standards. Thus the computer technology applied to the testing machine, composed for the screen display hydraulic universal testing machine has become an inevitable trend. Screen display hydraulic universal testing machine mechanical properties testing and analysis of a variety of metals, non-metallic and composite materials, widely used in aerospace, machinery manufacturing, vehicle manufacturing, ceramics, building materials, food, pharmaceutical packaging, metal materials, buildingengineering and other industries, as well as institutions of higher learning, rese