中国的金属成品职业别离从属于冶金、轻工、石 油、煤炭、化工、林业、渔业等部门。改革开放以来,跟着国民经济的高速开展,金属成品职业在设备、工艺技术水平、商品质量、产值和种类等方面,有了较大的前进当前,全国金属成品公司超过了600家,生产能力超过了300万吨/年;其间能生产中、高碳钢丝、钢绳的公司有l 50多家;金属成品的种类约有80种。大多数商品基本能满意国内需求,但在成种类类和质量上仍未能彻底满意商场和国民经济开展需要;与世界上工业发达国家 比较,在工艺技术,拉丝机配备水平、商品质量、种类等许多方面,仍有较大的距离。
中国金属成品的骨干公司,大多数是五、六十年代 建成投产的,在设备,工艺水平,生产能力、商品质量等方面,远远落后于工业发达国家; 虽然在七十年代晚期和八十年代前期,部分公司引入了各种类型的高速拉丝机,捻股、成绳机, 各种成品生产线等,但全职业的丝机配备水平仍较落后。据有关部门统计,当前中国拉丝机配备水平:属八十年代水平的设备约占I。15% ,六十至七十年代水平的设备约占30%, 四十至五十年代水平的设备约占55—60%。许多厂家的拉丝机仍以普通滑轮式拉丝机为主,这在很大程度上限制了成品的质量、产值的进步和种类的增加;进入 八十年代后,各成品厂家为了进步商品质量、产值,增加商种类类,纷繁从各发达国家引入各种型式的拉丝机,共计有i00多台(组),可以说世界止所有领先的 和比较领先的拉丝机,中国都 I进过;使中国的拉丝机形成了以老式滑轮拉丝机为主,兼有双卷筒式、直进式、活套式、调谐辊直线式、组合式及各种水箱拉线机并存的现状。
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