Analysis and improvement measures of surface scratch defect of spring steel for railway spring bar
In view of the scratch defects on the surface of spring steel for railway spring bar,the experimental detection and analysis were conducted,and the reasons were discussed to find out the root causes of scratch defects.The results showed that the long scratches were the sliding friction between the guide groove between the exit of the rolled part and the finished product frame to the 3# shear and the conveying roller frame after the 3# shear.A groove was formed after long-term fric-tion.The intermittent scratches were produced by contact friction between rolled pieces and skirt and skirt rollers with sharp corners during high-speed discharge.Combining with the quality problems existing in the production process,the improve-ment measures were put forward to effectively control the scratch defects on the surface of the spring steel for the railway spring bar.The quality of final products was good,which was recognized by the customers.
railway spring barlong scratchintermittent scratchguide grooveconveying roller framelift apronapron roller
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