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在毛主席革命路线的指引下,在无产阶级文化大革命的鼓舞和推动下,组合机床事业发展非常迅速。目前一个设计和制造组合机床的群众运动,正在全国蓬勃展开。我国组合机床的拥有量逐年猛增,通用部件的品种也不断增加,技术水平有了很大的提高。为了扩大组合机床的使用范围,有必要制定全国性的组合机床通用部件系列标准,来协调统一全国组合机床通用部件的系列参数、互换尺寸,以最少的品种和规格满足最大的需要。为此,大连组合机床研究所根据一机部一机院字(72)475号文的指示,负责组织制订了组合机床精度及通用部件等十五项部标准(JB1521—75至JB1535—75)。 由于小型组合机床使用的行业对象较广,不仅应用在汽车、拖拉机、柴油机、农机行业,还要用在仪器、仪表、缝纫机、自行车、军工生产等行业。既要满足大批大量生产行业的需要,又要满足中小批生产行业的需要。另一方面,小型组
Under the guidance of Chairman Mao’s revolutionary line and with the encouragement and impetus of the Great Proletarian Cultural Revolution, the combination machine tool business has developed rapidly. At present, a mass movement to design and manufacture combined machine tools is booming throughout the country. China’s possession of combined machine tools surge year after year, the variety of common parts are also increasing, the technical level has been greatly improved. In order to expand the scope of the combined machine tool, it is necessary to develop a series of national standard series of common parts of machine tools to coordinate a series of parameters of the common parts of the national combination machine, interchange the size, with the smallest variety and specifications to meet the greatest needs. To this end, Dalian Combined Machine Tool Research Institute under the direction of a unit of a hospital word (72) 475, is responsible for the organization and formulation of a combination of machine tool accuracy and common parts and other 15 Department standards (JB1521-75 to JB1535-75) . As the small modular machine tool used in a wide range of industries, not only used in automobiles, tractors, diesel engines, agricultural machinery industry, but also used in instruments, meters, sewing machines, bicycles, military production and other industries. It is necessary to meet the needs of a large number of large-scale production industries, but also to meet the needs of small and medium batch production industry. On the other hand, small groups