人字齿的齿轮部件结构如下图所示,01与03件为45钢,焊前要进行热处理,中间双幅板02件为Q235钢板.该件均为圆形封闭焊缝,整个结构特点是刚度大、自由度小,因而易产生较大的焊接应力,若工艺不当则直接导致焊接过程中或焊后出现裂纹.多年来我厂采用下述工艺规范,使人字齿轮的焊接件返修率一直很低. Herringbone gear components structure as shown below, 01 and 03 pieces of 45 steel, heat treatment before welding, the middle of the two pieces of Q235 steel plate 02. The pieces are round sealed weld, the whole structure is characterized by stiffness Large, less degree of freedom, and thus easy to produce greater welding stress, if the process is not directly lead to the welding process or after welding cracks. Over the years I plant the following process specifications, the herringbone gear welding repair rate has been Very low.