“I”型齿轮是牛头刨床齿轮箱结合部分的主要零件,对锻造要求很高。在试制的时候,这种齿轮我们是采用把坯料镦粗后中间卡细,再打小小凸缘一端的方法来锻造的。结果锻件产生了偏心,质量差,放的加工余量大(每边约4毫米);由于锻件同心度差,在切削加工时,机床震动得很利害,加工效率很低。后来经过大伙研究,根据齿轮的不同形状,设计出一套 “I” type gear is the main part of the shaper gearbox combination part, demanding forging. In the trial production, this gear we are using the blank upsetting the middle card fine, and then hit the end of a small flange forging method. As a result, the forging has eccentricity, poor quality and large allowance (about 4 mm on each side). Due to the difference of the concentricity of forgings, the machine vibration is very disadvantageous during the cutting process and the processing efficiency is very low. Later, after all the research, according to the different shapes of gears, designed a set