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加工硬度HRC65淬火钢的刀具,业界技术人员讲述如下:

发布时间:2013-08-08

A:钢淬火后加工刀具:如果是单件偶尔性生产,可用合适牌号的普通硬质合金刀具进行加工,如果批量加工淬火钢,根据工件硬度和加工余量在涂层硬质合金,陶瓷刀具,CBN刀具三种刀具材质中选用。 1、涂层硬质合金刀具:适合HRC45以下硬度工件的加工,相对来讲需低速车削,
2、陶瓷刀具:适合硬度在HRC40--55度的工件的加工,但尽量避免断续车削。
3、CBN刀具:对淬火后硬度在HRC55硬度以上的工件最为适合,立方氮化硼刀具分两种,焊接复合式立方氮化硼刀具一般吃刀深度在0.3mm以下为佳。(资料摘自华菱超硬公司网站,引用需说明出处)
注意:吃刀深度0.3mm以上,或者有断续加工的淬硬钢可考虑用整体式立方氮化硼刀片
B:被加工套硬度高,孔深且带油沟如果采用以车代磨对机床、夹具、刀杆、刀片有特殊要求,加工时吃刀量、走刀量要小切削速度不能高,否则容易出现让刀、打刀、刀具磨损快的问题,孔公差也很难保证,如再加上研磨加工效率非但不会提高,工具费用、人工费用会提高不少。还是以磨加工为宜,可以考虑提高磨削加工效率,如采用CBN砂轮,硬质合金砂轮杆,提高磨削数度,增加班次或设备,控制热处理变形减少磨削余量。
C:能加工硬度HRC65淬火钢的刀具一定有:
1 、首先你的工件加工前是否够圆够直?
不行的话留5丝的磨量不够多,要加到20丝磨量的话不如不车
2、 你车磨的夹具是否有足够的刚性和精度不行的话留5丝的磨量不够多,要换夹具
3 、刀杆是进口带阻尼的相对会好点,但价钱也不菲.觉得贵的话也用不着往下看了.
4 、刀片不外是陶瓷,瓷金,CBN,差点的是YS8,726.YH1.首先否定CBN,切削阻力最大,用CBN要先有很好的机床和刀具刚性,你的刀杆没有.让刀很厉害,就算你刀杆刀片顶得住也要车好几刀,不如不车.瓷金加工不了60度以上的东西,陶瓷比CBN还要脆,切削阻力和CBN一样大,再加上你是断续切削,结果就是CBN让刀,陶瓷崩刀,YS8,726和YH1加工的切削阻力最少,但也是最不耐磨的,有很好的刀杆和时间的话值得一试.先试YS8.刀片角度是很考技术的,你有没这方面的经验
5 你的工件是什么材料?你的工艺流程没说?是否原材料买回来粗加工~热处理~半精加工~精磨?还是拿回来只是精磨
如果是原材料买回来到加工成品的话问题更多了,热处理的控制变形和校直也是有学问的.



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