電機軸加工的專用鉆具

   在電機的(de)(de)(de)生產中(zhong)(zhong)(zhong)(zhong)(zhong)，加(jia)(jia)(jia)工電機軸(zhou)一(yi)般需要(yao)先(xian)鉆(zhan)(zhan)(zhan)(zhan)兩頭(tou)(tou)的(de)(de)(de)中(zhong)(zhong)(zhong)(zhong)(zhong)心孔(kong)，在普通車(che)床上(shang)用(yong)(yong)(yong)(yong)(yong)(yong)卡盤加(jia)(jia)(jia)緊(jin)(jin)軸(zhou)，鉆(zhan)(zhan)(zhan)(zhan)完一(yi)端(duan)中(zhong)(zhong)(zhong)(zhong)(zhong)心孔(kong)后調頭(tou)(tou)再鉆(zhan)(zhan)(zhan)(zhan)另一(yi)端(duan)中(zhong)(zhong)(zhong)(zhong)(zhong)心孔(kong)，一(yi)根(gen)電機軸(zhou)的(de)(de)(de)兩端(duan)軸(zhou)中(zhong)(zhong)(zhong)(zhong)(zhong)心孔(kong)需要(yao)兩次裝(zhuang)卡,既(ji)費力又費時。下(xia)面是(shi)一(yi)種簡便(bian)易操作的(de)(de)(de)專用(yong)(yong)(yong)(yong)(yong)(yong)中(zhong)(zhong)(zhong)(zhong)(zhong)心鉆(zhan)(zhan)(zhan)(zhan)具(ju)。利用(yong)(yong)(yong)(yong)(yong)(yong)這種鉆(zhan)(zhan)(zhan)(zhan)具(ju)，只要(yao)用(yong)(yong)(yong)(yong)(yong)(yong)手扶住(zhu)電機軸(zhou)就可以加(jia)(jia)(jia)工，比原加(jia)(jia)(jia)工方法(fa)提高效率數倍，并(bing)且(qie)減輕了(le)勞動強(qiang)度，使用(yong)(yong)(yong)(yong)(yong)(yong)方便(bian)即使技術(shu)不熟練的(de)(de)(de)操作員也能(neng)勝任(ren)。中(zhong)(zhong)(zhong)(zhong)(zhong)心鉆(zhan)(zhan)(zhan)(zhan)夾(jia)頭(tou)(tou)裝(zhuang)入(ru)機床主軸(zhou)錐(zhui)孔(kong)內，中(zhong)(zhong)(zhong)(zhong)(zhong)心鉆(zhan)(zhan)(zhan)(zhan)夾(jia)頭(tou)(tou)的(de)(de)(de)另一(yi)端(duan)鉆(zhan)(zhan)(zhan)(zhan)有(you)(you)裝(zhuang)卡中(zhong)(zhong)(zhong)(zhong)(zhong)心鉆(zhan)(zhan)(zhan)(zhan) 的(de)(de)(de)孔(kong)。中(zhong)(zhong)(zhong)(zhong)(zhong)心鉆(zhan)(zhan)(zhan)(zhan)裝(zhuang)入(ru)中(zhong)(zhong)(zhong)(zhong)(zhong)心夾(jia)頭(tou)(tou)的(de)(de)(de)一(yi)端(duan)磨(mo)有(you)(you)一(yi)平臺(tai)，以便(bian)擰入(ru)頂絲后可以緊(jin)(jin)固。錐(zhui)形套(tao)裝(zhuang)入(ru)尾座的(de)(de)(de)錐(zhui)孔(kong)內。錐(zhui)形套(tao)和錐(zhui)形滑(hua)套(tao)的(de)(de)(de)錐(zhui)度大小(xiao)應根(gen)據被加(jia)(jia)(jia)工電機軸(zhou)的(de)(de)(de)大小(xiao)而(er)定，一(yi)般在30°~45°之間(jian)。可防止錐(zhui)形滑(hua)套(tao)滑(hua)出并(bing)控制(zhi)中(zhong)(zhong)(zhong)(zhong)(zhong)心孔(kong)的(de)(de)(de)深(shen)度。鉆(zhan)(zhan)(zhan)(zhan)具(ju)體(ti)上(shang)設(she)有(you)(you)定位(wei)(wei)螺釘。鉆(zhan)(zhan)(zhan)(zhan)具(ju)體(ti)可利用(yong)(yong)(yong)(yong)(yong)(yong)焊上(shang)的(de)(de)(de)一(yi)塊方鐵(tie)裝(zhuang)夾(jia)在刀(dao)架上(shang)加(jia)(jia)(jia)工前，先(xian)搖動鉆(zhan)(zhan)(zhan)(zhan)具(ju)體(ti)使它處(chu)于中(zhong)(zhong)(zhong)(zhong)(zhong)心鉆(zhan)(zhan)(zhan)(zhan)夾(jia)頭(tou)(tou)的(de)(de)(de)適當(dang)位(wei)(wei)置(zhi)中(zhong)(zhong)(zhong)(zhong)(zhong)。然后，校準鉆(zhan)(zhan)(zhan)(zhan)模體(ti)的(de)(de)(de)中(zhong)(zhong)(zhong)(zhong)(zhong)心，并(bing)夾(jia)緊(jin)(jin)在刀(dao)架上(shang)。

　　加工(gong)時，先開動機床，然(ran)后(hou)把工(gong)件放(fang)入錐(zhui)形(xing)(xing)(xing)滑套(tao)中，搖(yao)動尾座手輪(lun)，使錐(zhui)形(xing)(xing)(xing)套(tao)壓住工(gong)件并向中心鉆(zhan)方向移動(進刀)即可鉆(zhan)出中心孔。鉆(zhan)完中心孔后(hou)，將尾座和錐(zhui)形(xing)(xing)(xing)套(tao)一(yi)起(qi)搖(yao)回原位(wei)，調頭加工(gong)另一(yi)端(duan)中心孔。為提高中心孔的光潔度和中心鉆(zhan)的耐用度，在(zai)加工(gong)時，可利用鉆(zhan)具體上的圓孔和錐(zhui)形(xing)(xing)(xing)滑套(tao)上的長形(xing)(xing)(xing)槽澆入冷(leng)卻液。這種鉆(zhan)具的特點(dian)是：制造方便、操簡單,宜于推廣。