一次成型的多层卷焊管的试验研究

EXPERIMENT ON MAKING MULTI WALL TUBE IN ONE FORMING PROCESS

介绍了４层卷焊管的卷曲方法以及孔型设计的方法，通过对１０机架成型机组卷曲４层卷焊管的试验分析了影响多层卷焊管成型的因素，提出了成型力能参数的测试方案和观察试验方案，对试验结果进行了分析。并根据试验结果，对４层卷焊管的孔型设计提出了若干改进方法。

It is introduced how to wrap four wall tube and design the pass.By the experiment on wraping four wall tube with ten stand forming set the factors to influence the forming of multi wall tube are analysed,the test program for forming power and force parameters and observation scheme are proposed,the result is concluded.And some improvements for pass design of four wall tube offered.