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B棟401
具體參數
拖(tuo)泵銑齒(chi)方法和工(gong)藝過程(cheng)
在(zai)普通(tong)臥式銑床上,采用(yong)帶有轉(zhuan)盤的(de)(de)分(fen)度(du)(du)頭(tou)進行分(fen)度(du)(du)。具體方法是(shi)(shi)想將齒(chi)(chi)(chi)(chi)坯(pi)固定(ding)(ding)在(zai)分(fen)度(du)(du)頭(tou)上,見 調整分(fen)度(du)(du)頭(tou)傾角,將分(fen)度(du)(du)頭(tou)扳起(qi)一個角度(du)(du),該角度(du)(du)等于(yu)錐(zhui)(zhui)齒(chi)(chi)(chi)(chi)輪根(gen)錐(zhui)(zhui)角δf,用(yong)切痕(hen)法使銑刀廓形(xing) 的(de)(de)對(dui)稱線對(dui)準(zhun)齒(chi)(chi)(chi)(chi)坯(pi)的(de)(de)中心,調整切削深度(du)(du),以(yi)大端(duan)為基準(zhun),將工(gong)(gong)作臺(tai)升(sheng)高一個大端(duan)全齒(chi)(chi)(chi)(chi)高后,先(xian)銑齒(chi)(chi)(chi)(chi) 槽的(de)(de)中部,由于(yu)此時采用(yong)的(de)(de)直齒(chi)(chi)(chi)(chi)錐(zhui)(zhui)齒(chi)(chi)(chi)(chi)輪成形(xing)銑刀的(de)(de)厚度(du)(du)是(shi)(shi)按照(zhao)略小于(yu)錐(zhui)(zhui)齒(chi)(chi)(chi)(chi)輪小端(duan)的(de)(de)齒(chi)(chi)(chi)(chi)槽寬度(du)(du)設計的(de)(de), 所以(yi)齒(chi)(chi)(chi)(chi)槽中部銑好后,齒(chi)(chi)(chi)(chi)輪大端(duan)和兩側面(mian)還有一定(ding)(ding)加(jia)工(gong)(gong)余量,因此,還要對(dui)上述(shu)部位進行加(jia)工(gong)(gong)。
此時(shi), 將分(fen)度(du)頭底(di)座在水平面旋(xuan)轉一個α角(jiao),使銑刀廓形對稱線和齒(chi)(chi)坯軸線成一個角(jiao)度(du),同(tong)時(shi)適當移(yi)動橫向 工(gong)作臺(移(yi)動量可以通過試切(qie)來確定),先(xian)將齒(chi)(chi)槽(cao)一側的余(yu)量銑去,然后(hou)再將分(fen)度(du)頭底(di)座反(fan)向旋(xuan) 轉2α角(jiao),橫向工(gong)作臺也反(fan)向移(yi)動,銑削齒(chi)(chi)槽(cao)的另(ling)一側面余(yu)量。