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加工部位：箱体内孔

工件材质：灰铸铁

硬 度：HB200-300

加工工序：精镗

刀 片：立方氮化(hua)硼刀片

变(bian)(bian)速(su)箱(xiang)(xiang)壳体(ti)是(shi)汽车重要(yao)的(de)(de)(de)零(ling)(ling)件之一(yi)(yi)，它将一(yi)(yi)些轴、套(tao)和(he)齿轮等零(ling)(ling)件组装(zhuang)在一(yi)(yi)起，使(shi)它们(men)保(bao)(bao)持正确(que)的(de)(de)(de)相互位(wei)置关系。因此，这(zhei)些零(ling)(ling)件盒组件的(de)(de)(de)装(zhuang)配精(jing)度(du)及装(zhuang)成后(hou)机(ji)器的(de)(de)(de)性(xing)能(neng)(neng)(neng)、寿(shou)命，在很大程度(du)上(shang)决定(ding)于(yu)箱(xiang)(xiang)体(ti)本(ben)身的(de)(de)(de)加(jia)工(gong)(gong)(gong)(gong)质量。变(bian)(bian)速(su)箱(xiang)(xiang)材料常(chang)选(xuan)用(yong)灰铸铁(tie)，这(zhei)是(shi)因为灰铸铁(tie)具有(you)较(jiao)好的(de)(de)(de)耐(nai)磨(mo)(mo)性(xing)，可(ke)切削(xue)性(xing)，成本(ben)又低，也可(ke)采用(yong)铸钢件。对(dui)于(yu)有(you)夹渣、气孔(kong)的(de)(de)(de)铸铁(tie)变(bian)(bian)速(su)箱(xiang)(xiang)壳体(ti)毛坯机(ji)械加(jia)工(gong)(gong)(gong)(gong)，要(yao)想充分满足变(bian)(bian)速(su)箱(xiang)(xiang)壳体(ti)的(de)(de)(de)加(jia)工(gong)(gong)(gong)(gong)特(te)点要(yao)求(qiu)，传统加(jia)工(gong)(gong)(gong)(gong)方法是(shi)很难(nan)实现(xian)的(de)(de)(de)，为了减少对(dui)刀(dao)和(he)换刀(dao)的(de)(de)(de)时间，提(ti)高大批量加(jia)工(gong)(gong)(gong)(gong)效率，在加(jia)工(gong)(gong)(gong)(gong)变(bian)(bian)速(su)箱(xiang)(xiang)壳体(ti)时可(ke)优选(xuan)多刃(ren)可(ke)转位(wei)的(de)(de)(de)CBN刀(dao)片(多齿铣(xian)刀(dao)盘)，便(bian)于(yu)装(zhuang)卸(xie)，一(yi)(yi)个刀(dao)刃(ren)可(ke)加(jia)工(gong)(gong)(gong)(gong)70-100件，刃(ren)口磨(mo)(mo)损后(hou)可(ke)更换另一(yi)(yi)个刃(ren)口，提(ti)高加(jia)工(gong)(gong)(gong)(gong)效率50-70%，加(jia)工(gong)(gong)(gong)(gong)较(jiao)小的(de)(de)(de)变(bian)(bian)速(su)箱(xiang)(xiang)壳体(ti)的(de)(de)(de)孔(kong)系时，也常(chang)在立式(shi)铣(xian)床、卧(wo)式(shi)铣(xian)床等万能(neng)(neng)(neng)机(ji)床上(shang)进行，对(dui)于(yu)孔(kong)的(de)(de)(de)加(jia)工(gong)(gong)(gong)(gong)，相对(dui)有(you)些难(nan)度(du)，东泰公司研(yan)发的(de)(de)(de)一(yi)(yi)款T型(TNGA系列)CBN刀(dao)片，专(zhuan)门用(yong)来镗孔(kong)，CBN镗刀(dao)片能(neng)(neng)(neng)保(bao)(bao)证所要(yao)求(qiu)的(de)(de)(de)光洁(jie)度(du)、尺寸精(jing)度(du)和(he)几何(he)形(xing)状精(jing)度(du)。以车代磨(mo)(mo)工(gong)(gong)(gong)(gong)艺在重型汽车变(bian)(bian)速(su)器大批量生产(chan)中广泛(fan)应用(yong)，解决了传统磨(mo)(mo)削(xue)工(gong)(gong)(gong)(gong)艺加(jia)工(gong)(gong)(gong)(gong)难(nan)题，生产(chan)效益显著。另外，产(chan)生的(de)(de)(de)切屑便(bian)于(yu)回(hui)收处理(li)，更体(ti)现(xian)了绿(lv)色、环保(bao)(bao)的(de)(de)(de)加(jia)工(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)艺。