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对使用两辊成品孔型、半万能成品孔型和万能成品孔型轧制高精度重轨的产品尺寸精度和形状精度进行了研究。在生产条件下进行两辊成品孔型的轧制实验 ,在实验室进行半万能成品孔型和万能成品孔型轧制高精度重轨的实验。三种孔型均可以轧制出满足 2 0 0 km/ h和 3 0 0 km/ h标准要求的高精度重轨 ,成材率和尺寸精度依次为万能孔型、半万能孔型和两辊孔型。
The dimensional accuracy and shape accuracy of products using two-roll finished hole, semi-universal finished hole and universal finished hole rolling high-precision heavy rail were studied. Under the condition of production, the two-roll finished hole rolling test was carried out and the semi-universal finished hole test and the universal finished pass rolling high-precision heavy rail test were conducted in the laboratory. The three types of holes can roll out high precision heavy rail which meets the standard of 200 km / h and 300 km / h. The yield rate and dimensional accuracy of the three kinds of passways are universal hole type, semi-universal hole type and two-roller hole type.