焊接吊耳锯切质量评定指标及影响因素

Sawing quality's evaluation indices and influence factors of the welded lifting lug

焊接吊耳是钢结构制造过程中用于吊装的重要零件。结合传统的锯切原理,从结构上分析焊接吊耳的锯切,为减小留根量,在利用带锯条锯切焊接吊耳时需要采用水平锯切方式,同时不能使用传统的带锯条扭转装置,而应该增大张紧力保证锯切质量。并将切口表面粗糙度Ra和留根斜度的正切值ρ作为锯切焊接吊耳质量的评定指标。采用正交实验法研究张紧力、锯切速度以及进给速度对焊接吊耳锯切质量的影响。研究表明:张紧力和进给速度对Ra和ρ的影响最大,锯切速度对粗糙度影响较小;张紧力越大,进给速度越小,则锯切质量越好。

During the manufacture of the huge steel structure,the welded lifting lugs used for lifting are important parts. The article combines the traditional sawing theory to analyze the sawing of the welded lifting lugs on the structure. In order to reduce the root cutting,the article proposes that welded lifting lug needs to adopt horizontal sawing when using band saw blade to saw the welded lifting lug, meanwhile it can/t use the traditional band saw blade twisting device. Uses surface roughness of the cuts Ra and tangent value of the root cutting gradient as quality evaluation index of the sawing welded lifting lug. Uses the orthogonal test to analyze the sawing quality efforts of welded lifting lug from tension force, sawing speed and feeding speed. The researches show that, tension force and feeding speed have the most important influence on Ra and, sawing speed has less influence on roughness. As the larger tension force and the smaller feeding speed, the sawing quality will be better.