正文 034 钳工的基本工作（加更）(第2页/共4页)
习的就是使用工具，学会看图纸。”
“其它工具呢厂里会给你配发，这个虎钳是我们工作中最常用到的工具。”
“当我们在打磨零件的时候，这个虎钳的作用是相当大的，我们在工作的时候，尽量把工件加在虎钳钳口的中部，让工件能够受力均匀，不然打磨难度很大，还容易出现次品。”
“虎钳就是用来夹紧工件，当夹紧工件的时候，千万不要用手锤或者是其它东西来敲击这个手柄，不然很容易让丝杠，螺母还有虎钳的钳身受损。”
“你看这个是虎钳的光滑表面，这里千万不用来进行敲击作业，这对虎钳的性能会有很大的伤害。”
“在我们加工的时候，用力最好是朝向固定钳身，你看我，这样用力起来是不是很方便也很轻松。”
林凡一边解说一边给陈涛做示范，十分的用心。
“想要正式操作你现在还不行，但是现在可以先学着划线。”
“什么是划线？”
“我们在得到图纸后，根据图样的尺寸要求，用划线工具在毛坯或者是半成品工件上划出待加工部位的轮廓线，作出基准的点、线。”
“这个划线呢，可以确定加工面的加工位置和加工余量，能够及时的发现不合格的毛坯，这些不合格的毛坯再通过借料划线将误差较大的毛坯进行补救。”
“我们平常的划线分为平面划线和立体划线。”
随后林凡从工作台拿出了一件毛坯指着上面的划线说道：“你看这上面的就是平面划线。”
随手翻转工件，指着几个平面说道：“平面划线结合起来就是立体划线，让工件的问题更加客观的展现在我们的面前，然后更方便的进行修正。”
“我们用的划线工具有很多，基准工具，量具，直接划线工具和夹持工具。”
林凡从台子上拿了一个划线平台，说道：“这个是划线平台，这四个侧面有固定的小孔，我们在用的时候，一定要把它进行平稳牢固，一定将它保持水平。”
“平面的每个地方都要均匀使用，千万不要没事碰撞还有敲击，上面一定要经常擦拭，不用的时候要盖好保护罩，涂好防锈。”
拿起一个游标卡尺，说道：“这是我们用的量具，这是游标卡尺，做工件的时候一定要严格按照图纸上标注的尺寸制作，这些量具就是确保我们在打磨的时候保证精准度。”
“划线的工具有划针、划规、划卡、划针盘和样冲.......”
“划规是划圆或者是划弧线、等分线以及量取
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