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Selection of cutting fluid for metal cutting finishing
金刚石刀具
厂家介绍精加工按切削速度划分,有高速精加工和低速精加工之分。高速精加工时,使用油基切削液虽然能够保证工件表面质量,延长刀具使用寿命,但其所含的矿物油的粘度和闪点低,经常产生油烟、油雾和油蒸气,同时分解有毒成分,影响生产环境,损害操作者的身心健康。所以精加工高速切削时,尽可能地使用水基切削液中含极压添加剂的乳化液或微乳化液,且其浓度要高于粗加工的浓度。低速精加工时,切削温度低,不易产生上述问题。为了保证工件的加工精度,宜使用油基切削液。
金刚石刀具厂家介绍相对于粗加工而言,精加工时的切削速度高,切屑变形产生的切削热比刀具后刀面摩擦产生的切削热低,切削力小,即使高速切削,切削热对工件的热变形也没有粗加工明显,刀具之所以使用切削液主要是减少刀具后刀面的磨损。刀具在精加工时,相对切削速度较高,切屑从工件上切除的瞬间的温度是很高的,即便使用切削液,若因切削液的渗透性不好或压力不够,切削液没有充分渗透到切削区,会使刀具极易出现后刀面磨损,即使刀具仍然能够使用,却使工件表面粗糙度质量达不到要求,仍然需要更换刀具。所以精加工时,一定要使用润滑效果显着、渗透性好的切削液,以延长刀具的使用寿命,保证工件的加工精度和表面粗糙度质量要求。
金刚石刀具
厂家介绍低速精加工黑色金属材料时,可以选用活性极压切削油;低速精加工有色金属时,宜选用非活性极压切削油;高速精加工有色金属时,可以选用非活性极压添加剂的乳化液。
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