我厂生产的2～10吨塔吊,用户对制造質量反映最大的问题是托輪槽部表面有严重的裂纹,有的輪子淬硬层甚至出现了大块的脱落。我们对北京市住房二公司使用的六台塔吊进行了现場调查,发现不合格率竟高达47.9％,给塔吊的安全运行造成了很大的威胁。为此,我们对托輪槽部裂纹进行了分析,并找出了解决办法。 I plant the production of 2 to 10 tons of crane, the user of the manufacturing quality of the biggest problem is that the surface of the roller groove serious cracks, and some wheel even hardened layer off. We conducted a field investigation on the six cranes used by Beijing Housing Company II and found that the failure rate was as high as 47.9%, posing a great threat to the safe operation of the tower crane. To this end, we analyzed the crack on the groove of the support roller and found the solution.