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一、概述一般人们普遍认为:“我国机器制造业技术水平低,技术发展速度慢”。这可从主要三方面去观察,即产品水平低,制造水平低和管理水平低。国外,机械产品换代年限,一般为五年左右。如西德小型机床基型设计的更新期约为五年;大型产品为八年。意大利对专用机床的更换期为五～六年。英、瑞典、澳大利亚等国为三年左右。苏联在更新设计时就规定出新系列产品的更新期,一般为七年;新系列基型产品的生产率至少应比老产品提高15％。在制造水平方面对于单一产品,大批量生产,国外均采用机加工生产启动线对于多品
First, an overview Generally people generally think: “China’s low level of technology manufacturing machinery, technology development is slow.” This can be observed from the three main areas, namely low product level, low manufacturing level and low management level. Foreign, mechanical products replacement life, generally about five years. For example, the renewal period of a small machine tool base design in West Germany is about five years; that of a large product is eight years. Italy for special machine replacement period of five to six years. Britain, Sweden, Australia and other countries for about three years. The Soviet Union stipulated the renewal period of the new series of products at the time of updating the design, usually for seven years; the productivity of the new series of basic products should be at least 15% higher than that of the old ones. In the manufacturing level for a single product, high-volume production, foreign manufacturers are using the production line for the production of multi-line