我厂318车间1~#轧机1973年8月因下角出现长530、厚350的大裂纹而停产(图中A向)。为了修复机架,提高焊接质量,要求用机械加工作出550×350×110的焊接坡口。根据我厂加工能力,这个重达30吨的闭式机架难于加工。但是机修车间职工大胆创新,提出用牛头刨加工焊接坡口的方案。应用这一方案在318车间现场顺利 I plant 318 workshop 1 ~ # mill in August 1973 because of the lower corner of the emergence of a long 530, 350 thick crack and discontinued (Figure A direction). In order to repair the rack, improve the quality of welding, requiring machining to make a 550 × 350 × 110 welding groove. According to our factory processing capacity, this weighing 30 tons of closed rack difficult to process. However, the mechanic shop workers bold and innovative, proposed with the head shaver welding groove program. Application of this program in the 318 workshop site smoothly