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拉丝机的发展现状

< class='newsInfoWrap'>< class='leftInfo'>发表时间:2018-09-05 09:38 < class='line1'> < class='richContent richContent0'>

  目前国内金属制品行业的总体技术水平和装备水平,与工业发达国家相比仍有较大的差距,在拉丝机主机、辅助设备、润滑技术、线材生产、拉丝模质量等方面还比较落后;面对我国金属制品行业的实际情况,单纯追求先进的大型、高速拉丝机是不切合实际的.也不可取;对于拉丝机的设计者和制造厂家来说,工作的重点应放在设计、制造运行可靠、操作、维护简单、生产效率较高的拉丝机。

  目前国际上拉丝机的设计制造主要有两大指导思想;一个是以意大利、德国、瑞典等欧洲工业发达国家为代表,主张拉丝机向大型、高速的活套式、直线式方向发展;另一个是以日本为代表,主张拉丝机有较高的速度,结合先进的辅助设备,向组合式拉丝机方向发展。

   欧洲国家以先进的机械、电气工业体系为依托,首先在拉丝模及其润滑技术和卷筒水冷系统上取得突破,使钢丝的拉拔速度和质量大大提高,其拉丝机主力是活套式、直线式和水箱拉丝机。但我国的具体情况是操作工人的技术水平较低,拉丝润滑剂性 E、线材的质量等都不能满足高速拉拔的要求,特别是直流系统电气元件的质量及可靠性使制品厂家感到操作维护困难较大。在目前条件下,我认为我国金属制品行业拉丝机的发展不应追求这类高等级的先进拉丝机。虽然它的优点人所周知,但国内的辅助、配套水平,会使这类拉丝机在生产实际中达不到机器的性能指标,造成投资浪费、回收时间过长。

  日本在拉丝机设计制造方面,与欧洲国家相比稍有差距,但在辅助设备、简化电气控制系统等方面作了大量工作;它的指导思想是拉丝机首先应做到操作、维护简单、方便,用先进高效的辅助设备来提高拉丝生产效率。它首先在交流变频调速方面取得突破,使拉丝机电气系统变得比较简单、可靠、操作、维护都较方便;另一特点是它主张利用组合式拉丝机,在保证钢丝质量的前提下,尽量降低设备投资。以中5.5大盘重线材为原料的典型工艺为倒,其具体作法是: 用qb600或qb560滑轮式拉丝机作为开坏机布置在组合式拉丝机的最前端,中间配置qb400滑轮式拉丝机,成品前一道次采用双卷筒式拉丝机,目的是为不停车卸线作准备,并使钢丝在进入成品模时减少扭转次数,而成品卷筒又采用直线式拉丝机,配以双向矫直机构,基本上消除和钢丝在前面道次拉拔中产生的扭转效应;最后配置大型工字轮收线机或其它连续卸线机,以提高拉丝生产线的效率。

  组合式拉丝机充分利用了各种型式拉丝机的优势,钢丝质量有较大的提高,并且可以用交流变频调速的方法使该类组合拉丝机具有象活套式或直线式拉丝机一样的、具有较大的机器压缩率的调节范围,对各种工艺路线适应性强。


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