鉆頭
鉆頭的結(jie)構,用處:
按其結構,可分(fen)為(wei)全(quan)(quan)(quan)體(ti)式與分(fen)體(ti)式兩(liang)種。全(quan)(quan)(quan)體(ti)式鉆(zhan)頭(tou)(tou)具有(you)便于加工和使用、能量傳(chuan)遞效率高等優(you)點,但全(quan)(quan)(quan)體(ti)鉆(zhan)頭(tou)(tou)因為(wei)鉆(zhan)頭(tou)(tou)作業面積(ji)硬質合片(柱)的磨損會導致全(quan)(quan)(quan)體(ti)鉆(zhan)頭(tou)(tou)的作廢,因而,廣泛選用分(fen)體(ti)式鉆(zhan)頭(tou)(tou)。
按其(qi)鉆刃(ren)形狀,可分為刃(ren)片型、柱齒型和片柱混裝型三種(zhong)。
柱齒(chi)(chi)型(xing)鉆頭(tou):是用(yong)(yong)機械的方法把必定(ding)標準的硬(ying)質合金柱壓(ya)入到(dao)鉆頭(tou)體上的齒(chi)(chi)孔中(zhong)而成(cheng)。 優點:在穿孔過程中(zhong)能自行(xing)修磨(mo),使鉆頭(tou)鉆進速度(du)趨于穩定(ding);可(ke)依據(ju)受(shou)力情況合理(li)安置合金柱;柱齒(chi)(chi)磨(mo)損2成(cheng)時,鉆頭(tou)依然能夠繼續作業;嵌(qian)裝工藝(yi)簡(jian)略(lve),一(yi)般用(yong)(yong)冷壓(ya)法嵌(qian)裝即可(ke)。
在油(you)用鉆(zhan)(zhan)(zhan)頭(tou)中按主要用處分有以下幾類:鉆(zhan)(zhan)(zhan)進鉆(zhan)(zhan)(zhan)頭(tou)(慣例鉆(zhan)(zhan)(zhan)頭(tou))。造(zao)(zao)斜鉆(zhan)(zhan)(zhan)頭(tou):用于造(zao)(zao)斜段(duan)井位,鉆(zhan)(zhan)(zhan)頭(tou)保徑段(duan)較短小。取芯鉆(zhan)(zhan)(zhan)頭(tou):用于取芯,依據內外徑的不同(tong)配備不同(tong)的取芯工具。雙芯擴眼(yan)(yan)鉆(zhan)(zhan)(zhan)頭(tou):分領眼(yan)(yan)鉆(zhan)(zhan)(zhan)頭(tou)與擴眼(yan)(yan)鉆(zhan)(zhan)(zhan)頭(tou)兩(liang)部分。