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通過(guò)自動(dòng)化控制系統(tǒng)和自動(dòng)化裝置自動(dòng)完成2~50m長(zhǎng)鋼軌件任意長(zhǎng)度鋸切和軌腰上鉆孔、倒棱、冷膨，特別是對(duì)軌腰孔壁進(jìn)行冷膨處理后，不僅能夠提高孔徑精度，而且可以改變孔周圍應(yīng)力分布，降低軌腰孔裂紋產(chǎn)生的概率。

The automatic sawing of 2~50m long steel rail at arbitrary length ,the drilling, chamfering of the rail waist and cold expansion can be realized through automatic control system and machine.  Especially, after the cold expansion with the hole wall of the waist, it can not only improve the pore diameter accuracy, but also change the stress distribution around the hole and reduce the probability of cracks in the waist hole of the rail.