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探秘高铁钢轨加工厂:接头高低相错误差不超3根发丝

2017-08-17 13:42:30   中国网

  成品铁轨每根500米长,焊成后堆放在铁轨旁的成品区,随时可以装车

下半年完成700公里高铁钢轨焊接任务,服务郑合高铁

“目前我们正昼夜赶工,源源不断为郑万和郑合杭高速铁路供应钢轨。”张志勇说,按照生产计划,今年下半年他们要完成700公里的高铁钢轨焊接任务,不加班加点根本不可能完成。

钢轨焊接质量是确保高速列车安全平稳运行的前提,而焊机的焊接工艺参数设置是最为关键的技术。“现在旅客乘坐高铁时没有了记忆中‘哐当哐当’的声音,列车平稳得能让硬币直立几分钟不倒,这正得益于严格的焊接标准。”31岁的基地工艺技术员罗宇航说,每一批新的钢轨母材运抵焊轨厂,他们都要按行业标准对钢轨材质进行分析和焊前试验,只有经过连续25个落锤、15个静弯、3个疲劳检测等10多项验证,才能开始正式生产。

千锤百炼方成钢。为保障钢铁钢轨质量,每焊接500个接头后,罗宇航还要组织一次落锤试验,再根据不同情况实时调整参数。在落锤试验现场,一块重达1吨的铁锤从5.2米的高度自由落体锤击钢轨焊头,一声钝响后,钢轨焊头只是轻微弯曲,并未断裂,“这说明前期的参数和工艺没有问题,如果有断裂迹象,则要展开诊断,及时调整作业参数”。

即便通过锤打这一关,每条高铁钢轨还须接受“长轨医生”的检查,主要是运用超声波探伤仪对焊头进行无损检测。检验合格后的钢轨会烙上“身份证”,上面记录着钢轨材质、出厂日期、生产编号等信息,以此实现质量抽检静态验收和动态跟踪,确保每一根出厂钢轨优质达标。

  全自动焊接车间,焊花飞溅

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从郑州坐高铁 可直达24个省会城市

本报讯随着我省“米”字形高铁逐渐成形和全国高铁新线路不断开通,从郑州出发乘高铁能够到达的城市越来越多。记者昨日从郑州东站获悉,目前该站每天发送旅客6.5万人次,日均开行旅客列车370列,从郑州乘坐高铁可以直达24个省会城市。

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