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我国拉丝机的发展方向

< class='newsInfoWrap'>< class='leftInfo'>发表时间:2018-09-06 15:29 < class='line1'> < class='richContent richContent0'>

  我国拉丝机今后将根据不同的金属制品特点,向以下几个方向发展。

  (1)对于大规格的低松弛预应力钢丝,钢铰线、大规格高强度高韧性的矿用钢绳钢丝和大规格的异形钢丝生产,调谐辊直线式拉丝机将得到广泛应用。如700,750,900型拉丝机等。虽然这类拉丝机投资大,对操作维护水平要求较高,但为了较大幅度地提高各种大规格钢丝的质量和产量,该机型具有其它拉丝机无法取代的优点,将在这类金属制品的生产中发挥越来越重要的作用。

  (2)对于在制品中占最大比例的普通中、小规格钢丝,特别是以中6 5中5 5大盘重线材为原料的钢丝生产, 日本型式的组合式拉丝机将在很长的耐间内,占据这类制品生产拉丝机的主导位置。

  自从7O年代日本成功地将交流变频调速控制系统应用于拉丝机设备上以后,这项技术在制品设备上的应用得到了迅速发展,西欧各国的制品设备制造厂家也纷纷采用这一技术;如KOCH公司已在调谐辊直线式拉丝机上应用这一技术并获得了成功。国内也有在活套式拉丝机上应用这一技术获得成功的例子。

  对于原来是直流拖动的调谐辊直线式拉丝机和活套式拉丝机改用交流变频调速系统可极大地简化拉丝机的电控系统,使操作、维护便于进行。

  这项技术对滑轮式拉丝机来说也有重要意义,它可使滑轮式拉丝机具有更宽、更强的适应能力,同时也能最大限度地减少拉拔过程中钢丝的扭转次数,从而弥补了滑轮式拉丝机的某些缺点,提高钢丝的质量。

  目前国内交流变频调速系统由于关键元件尚未国产化,致使系统的价格较高。但这只是暂时的,交流变频调速系统强大的生命力就在于它能大大降低电气系统的复杂程度和制造成本。随着我国电气工业的发展和系统元件的国产化进程,它在我国拉丝机上将得到越来越广泛的应用。

  (3)对于细小规格的各种钢丝生产,水箱拉丝机将进一步更新换代,具有双向拉拔能力的21/250型高速水箱拉丝机将占据主导地位,如意大的TB4和德国KOCH一21/250等典型代表机型。另外目前经过各制品厂家的摸索、总结,大规格的水箱拉丝机如9/450,9/550等机型和滑轮—水箱组合拉丝机在今后发展中,将逐渐增加其在水箱拉丝机中的比例。

  根据以上分析, 考虑到各种拉丝机在实际生产中所占的比例,我认为目前我们拉丝机设计的当务之急是尽快开发中550系列的组合式拉丝机和采用变频技术控制的各种拉丝机, 以取代目前国内大多数金属制品厂家所采用的普通滑轮式拉丝机,使我国的金属制品行业的装备水平和制品质量尽快赶上国际先进水平。


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