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B棟401
具體參數
拖泵銑(xian)齒方法和工藝(yi)過程
在普通臥式銑(xian)床上,采用帶有轉盤的(de)(de)分度(du)(du)頭(tou)進(jin)行分度(du)(du)。具體方法是想將(jiang)齒(chi)(chi)(chi)坯(pi)固定在分度(du)(du)頭(tou)上,見(jian) 調整(zheng)分度(du)(du)頭(tou)傾(qing)角(jiao),將(jiang)分度(du)(du)頭(tou)扳起(qi)一個(ge)角(jiao)度(du)(du),該角(jiao)度(du)(du)等于錐(zhui)(zhui)(zhui)齒(chi)(chi)(chi)輪(lun)根錐(zhui)(zhui)(zhui)角(jiao)δf,用切痕法使銑(xian)刀廓形(xing) 的(de)(de)對(dui)稱線對(dui)準(zhun)齒(chi)(chi)(chi)坯(pi)的(de)(de)中心,調整(zheng)切削深度(du)(du),以(yi)大(da)(da)端為基準(zhun),將(jiang)工(gong)作臺升(sheng)高一個(ge)大(da)(da)端全(quan)齒(chi)(chi)(chi)高后,先銑(xian)齒(chi)(chi)(chi) 槽的(de)(de)中部(bu)(bu),由(you)于此時采用的(de)(de)直齒(chi)(chi)(chi)錐(zhui)(zhui)(zhui)齒(chi)(chi)(chi)輪(lun)成形(xing)銑(xian)刀的(de)(de)厚(hou)度(du)(du)是按照略小于錐(zhui)(zhui)(zhui)齒(chi)(chi)(chi)輪(lun)小端的(de)(de)齒(chi)(chi)(chi)槽寬度(du)(du)設計的(de)(de), 所以(yi)齒(chi)(chi)(chi)槽中部(bu)(bu)銑(xian)好后,齒(chi)(chi)(chi)輪(lun)大(da)(da)端和兩側面(mian)還有一定加工(gong)余量(liang),因此,還要對(dui)上述部(bu)(bu)位進(jin)行加工(gong)。
此時, 將分度(du)(du)頭底座在水平面旋(xuan)轉(zhuan)一個α角,使銑(xian)刀(dao)廓形對稱(cheng)線(xian)(xian)和(he)齒(chi)坯軸線(xian)(xian)成一個角度(du)(du),同時適當移動橫向 工(gong)(gong)作(zuo)臺(移動量(liang)可(ke)以通過(guo)試切來(lai)確定),先(xian)將齒(chi)槽一側的(de)余量(liang)銑(xian)去,然(ran)后(hou)再將分度(du)(du)頭底座反向旋(xuan) 轉(zhuan)2α角,橫向工(gong)(gong)作(zuo)臺也反向移動,銑(xian)削齒(chi)槽的(de)另(ling)一側面余量(liang)。