一、前言我国现有的铜铝管材拉伸机,大多数是技术装备落后的单链拉伸机,不仅拉伸速度低、生产效率低,而且拉伸的管材质量差,劳动强度大。1975年我国从日本木材株式会社引进两台0.2MN双链回转式三线拉伸机,分别安装在沈阳有色金属加工厂和上海铜厂。这两台拉伸机的拉伸速度为0—30—90M/min,最大管坯直径φ40mm, I. Introduction China’s existing copper and aluminum pipe drawing machine, most of them are outdated technology and equipment of single-strand drawing machine, not only low drawing speed, low production efficiency, but also poor quality of drawing pipe, labor-intensive. In 1975, China introduced two 0.2MN double-chain rotary three-wire drawing machines from Japan Timber Co., Ltd., which were installed in Shenyang Nonferrous Metal Processing Plant and Shanghai Copper Plant respectively. The tensile speed of these two stretcher 0-30-90M / min, the largest tube diameter φ40mm,