我們承制的300馬力3弯曲軸,曾先后釆用过两种方法扭弯;一种是振扭法,一种是用一付簡单的扳手,用人力来扭弯。这两种方法都有缺点:前者质量不保証,容易产生裂紋,后者劳动强度大。最后由定祥生同志加以进一步的改进,用吊車同时吊两个扳手,一火扭弯一个曲弯。这样既可以减輕劳动强度,又提高了工作效率,而且保証了鍛件的質量。 The 300-horsepower 3-bend shaft that we have made has been used twice to twist; one is the vibration-to-torsion method, one of which is to twist manually using a simple pair of wrenches. Both of these methods have drawbacks: the former is not guaranteed in quality and is prone to cracking, and the latter is labor-intensive. Finally, Comrade Cheung Chung Shing to be further improved, using a crane while hanging two wrenches, a twist of a bend. This will not only reduce labor intensity, but also improve work efficiency, but also to ensure the quality of forgings.