Tính năng cắt và sai số kích thước gia công lỗ côn trên vật liệu khó gia công bằng máy cắt dây

D6Th6 Vinh v(7£)/g Tap chi KHOA HOC & CONG I^GHE 102(02): 15-19 TINH NANG CAT VA SAI S KICH THU'C(C GIA CONG LO CON TREN VAT LIEU KHO GIA CONG B A N G MAY C A T DAY Do The Vinh', T r u o n g Tii Piiong Trirdng Dai line Ky tliiidt Cong iigliiep - Dli That ,\giivi'ii TOM T A T Bai baa trinh bay cac ket qua nghien cuu ve each thiirc thiet lap lai cac thdng sd gia cdng, dieu chinh he tpa may, can chinh day thich hpp vdi gia cdng cdn cbo may cat day, Phan mem Mastercam V9 dupe sir dung dl lap trinh gia cdng lo cdn tren vat li^u SKD61 Cac sai sd kich thudc thang kich thudc gdc ciia chi liet va nham be'mat gia cdng tren may cat day CW322S da duo'c thu thap va phan lich thuc nghiemiKel qua daikhang'djnh tinh nang'gia cdng cao, chinh xac kich thudc va chat lirgng be mat san pham cao ban nhieu so vdi gia edng truyen thdng Thanh cdng ciia nghien ciru gdp phan mdrdng linh nang ciia may, pbuc vu tdt cdng tac dao tao va chuyen giao cdng nghe thdng qua khai '''' Ihac may cat day Tir khda: linh ndng cat mdy cdt ddv, vdl lieu SKD61 i GIOI THIEU CHUNG Ngay nay, cac san pham ca chtia dung nhu'ng chi liet duae lam tir nhii'ng vat lieu eirng, lau mdn va sieu cung nhu thep hgp kim sau nhiet luyen, vai lieu composit nen kim loai, gdm nguyen khdi va gdm composit, almindes Cac bien dang chi tiet rat da dang va phirc lap nhu cac Id, ranh dinh hinh cd kich Ihudc nhd, cac bien dang phuc tap, cac bd dudng ddi hdi dp chinh xac cao cang xuat hien nhieu trang thuc te san xual Viec gia cdng cbiiiig bang cdng nghe cat ggi thdng thudng (tien: phay; mai v.v ) la vd cimg khd khan, ddi khdng the gia cdng duoc, Viec thuc hien bang cac phuang pbap truyen thdng cd nhugc diem rat khd dieu chinh de dat duae chinh xac mong mudn Ta cd the nhan thay vi du nhu gia cdng cdn vdi phuong phap lien, gia cdng Id cd dudng kinh nhd va sau bang khoan, Thuc te ddi hot can phai phat trien cac cdng nghe gia cdng mdi de gia cdng nhu'ng vat lieu dd (phuang phap gia cdng phi truyin Ihdng) Mgl nhii-ng phuang phap dupe tim vao nam 1943 hai vp chdng ngudi Nga Lazarenko la phuang phap gia cdng lia lii'a dien (EDM) Ngay nay, gia cdng co tren the gidi cd hai phuong phap gia cdng tia lija dien chii ylu, dugc ung dung rpng rai dd la: Gia cdng ' Tel- 0983 548880, Emaih thevinh8880%gmad c xung dinh hinh va gia cdng cat day bang tia lira dien \^'EDM Phuang phap gia cdng cat day bang tia lii'a dien dugc goi la WEDM (Wire Electrical Discharge Machine;, phuong'phap dimg mdt day dan dien cd dudng kinh nhd (0.Imm - 0,3' mm) cudn lien tuc va chay theo mdt bien dang dmh Irudc de tao thanb mdt vet cat tren phdi Phuong phap da dugc phat minh va su dung rdng rai tren the gidi vao nhCrng nam 50 ciia the ky XX nhung it lu ddng hda Ngay nhd su phat Irien ciia dieu khien sd va cdng nghe thdng tin ma phuang phap nly da duae hien dai hda rat cao va dd trang bi dieu khiln sd CNC tren cac may WEDM Uu dilin cua WEDM la cd kha nang cat hiiu hit cac loai vat lieu dan dien, dp chinh xac cao [l](dd bdng Ra = 1,6 - 0.8 pm) chi licl gia cdng cd dd day Idn (cd the dat ldi 560 mm), gia cdng duae nhung Id, ranh dinh hinh cd kich thudc rat nhd, cat dugc cac hinh dang 3D dac biel va cat dugc cac contour pbii'c tap Do vay gia cdng cat day tia lira dien Ihudng dimg de gia cdng cac Id thdng cd bien dang phirc lap nhu cac Id tren khudn dap, khudn ep, khudn diic ap luc, che tao cac dien cue diing cho gia cdng xung djnh hinh, gia cdng cac ranh hep, gap khiic, cac dudng kiem, , Cac nghien cuu ve gia cdng tia lii'a dien d Viet Nam hien da duoc trien khai va cho 15 Do The Vinh va Dig Tap chl KHOA HQC & CONG NGH$ che dp cat tdi uu cung nhu anh hudng ciia cac thdng sd cat ldi dp chinh xac gia cdng va chat lugng be mat Tuy nhien mdi chi dung lai d nghien ciiu tren tinh n3ng gia cdng dan gian la cat try [3],[4], Dieu la h^n che ap dung vdl gia cdng bien dang phirc tgp dgng 3D Bai bao gidi thieu vipc nghien ciru gia cdng ck cdn tren may cSt day tia lira di?n da dat duock ket qua tdt MAY CAT DAY CW322S May cat day CW322S hang CHMER EDM-Chmg Hung Mechinery & Electric Industrial Co Lid - Taiwan san xuat May cd the gia cdng contour va gia cdng tryc vdi nhirng dac tinh nhu sau [5]: Chieu rdng ban may 530x320 m m Kich thudc phdi max 650x420x150 Khdi lugng phdi max 250 kg Hanh trinh true X 300 mm Hanh irinh true Y 200 mm Gdc cdn cat max ± 200/80 mm Dudng kinh day dien cue 0,1 0,3 mm Tde dd Idn nhSt ciia day 300 mm/s He Ihdng dilu khien true AC servo Ddng dien Idn nhSt 25 A Kich Ihudc toan may 2380x1855x1830 Khdi lugng may 1500 kg 102(02): 15-19 tren (dieu khiln theo true U - V) va dau dan day dudi (dieu khiln theo true X - Y) tao cho day cat gdc nghieng (gdc cdn) so vdi phuang thSng di>ng la khdng doi I);iv c;il ^'*^' 'J'""^ d;iv ducVi Hinh Gta cong vdi gdc khong doi - Dang chi tiet gia cong vdi goc thay doi: May se gia cdng Iheo trgc X-Y va U-V Dau diin day *• ^ ^ ^ ^ / ^ U Hinh Gia cong vdi goc thay ddi Lap trinh gia cdng - Lap trinh bang tay: Theo ngdn ngii' Fanuc, Lap trinh gia cdng tia Ida dien cung su dyng ngdn ngQ ISO-CNC Iren ca sd cac ma "G" Hinh L Mdy cdi ddy CW322S May sir dung day dien cue ddng dudng kinh lir 0,1mm 0,3 mm He dicu khiln ciia may la Fanuc GIA CONG CON VA TRUC TREN MAY CATDAYCW322S Dang chi tiet gia cdng - Dang chi tiet gia cong vdi gdc khong doi: Trong qua trinh cSt tao hinh, dSu dfin day Ung dung phan mim MasterCam [2]: Mastercam la mpt phan mem CAD CAM dugc sir dung rdng rai d chau Au va Iren the gidi ddng thdi nd dugc sir dung rat phd biln a Viet Nam MasterCam cd kha nang thiet ke, lap quy trinh gia cdng cho may phay CNC nam true, may lien CNC bon true, may cat day CNC bon true Ung dung Module Wire Irong Mastercam V9, la cd the lap trinh cat day theo dang: + Lap trinh gia cdng Iruc + Lap Irinh gia cdng true D6 Thi Vinh vd Dtg Tap chi KHOA HOC & CONG NGHE •^\^?V.-^*r'.Wrr-V^ 102(02): 15- 19 - Thiet lap tham so mdy gia cdng cdt vdi gdc khong did: Thiet lap cac tham sd sau Thong so Type Tapr Angle Program Plane (Z) Thickness Hinh U'ng dung Mastercam \'9 Dieu chinh, thiet lap thdng so tren may cat day CW322S gia cdng cat - Cdn Ihdng vi tri dau dan ddy: su dung thiet bj Vert Thiel hi dupe sir dung de can chinh day eat vudng gdc vdi ban may Tham so Nhap Gia tri gdc nghieng Nhap mat phang hinh hpc Nhap chieu day phdi - Thiet lap Iham so mdy gia cdng cdt cdn v&i gdc cdn thay ddi: Thiet lap Type muc CUT DATA la (Spe) Dal true Z ve diing vi tri da djnh lap trinh Danh gia sai so va thd'i gian gia cdng Vat lieu chi tiet gia cdng la thep SKD61 Day la loai vat lieu cd kha nang cd dd cii'ng va ben rat tdt nhiet luyen, cd irng suat nen rat tdt, tinh chdng mdn cao, dugc sii' dung nhieu nganh che tao may de lam cac khudn dap, cac chl liel may chju va dap Dd Cling nhiel luyen dat tir 52 - 56 HRC Bang \ Thdnh phdn hoa hoc cdc nguyen Id Tlimdi pliaii hoa hoc ck nguyen ti{%) C OJ"M Hinh Thiet bi I en - Hieu chinh tpa Z: Trong gia cdng cdn, dp chinh xac ctia true Z la bat budc Cac budc hieu chinh: + Chuan bi mau chuan + Dat mau chuan len ban may dua dau may xudng cham mau, doc tpa Z (gpi la A) + Liy gia trj A - chieu caa mau chuan = HI, + Bam nut HELP chon F8 (Prev), bSm lilp F9 (set work), irong muc Working Param.Setling, hien gia tri Z AXIS HEIGHT + Lay "gia tri Z AXIS HEIGHT" trir "Gia tri chenh lech" HI, sau dd nhap Iai vao muc Z AXIS HEIGHT + B4m phim F8 (sure & Prev) + Quay Iai man hinh MAN chgn Fl (home) chgn true Z + Kiem tra lai loa Z II S 0»1.1 Nhi Cr 0,3-0,< AU.6 Mo ! \ 1,2-1,^ |09-U , P p^ •0.or khac giu'a mat phang X'S" va UV den chinh xac cac kich thirdc cac mat phang khac TAI LIEU THAM KHAO [1] Vii Hoai An - Gia cdng lia lira dien - Nha xuat ban khoa hpc ky thuat 2007, [2] POSTS TrJn VTnh Hung - Mastercam phan mem thiet ke cdng nghe CAD/CAM dieu khien cdc mdy CNC - Nxb Khoa hpc & Ky thual - 2007 [3] ThS Nguyen Tien Nga - Nghien cuu dnh huang cua cdc thdng sd cong nghe tdi dd chinh xdc gia cdng, gia cong cdt ddy cdc vdt lieu kho gia cdng - Luan van cao hpc chuyen nganh cong nghe ch^ tao may DH KJ thuat Cdng nghiep 2010 [4] ThS Luu Anh Tiing - Nghien cuu dnh hudng ciia mdt sd thong so cdng nghe den nhdm be mdt vd ndng sudi gia cdng Irong gia cdng cdt ddy DdThg V i n h v a D r g T?p chi KHOA HQC & CONG NGHE lia lira dien thep 9CrSi sau toi - Luan van cao hpc chuygn nganh cdng nghe cha tao m^y DH KJ thuat Cdng nghiep 2011 102(02)' 15-19 [5] Operation Manual - CNC Wire cut EDM Chmer EDM Ching Hung Mechinery and Electric Industrial Co, Ltd - Taiwan, SUMMARY CUTTING F E A T U R E S AND DIMENSIONAL ACCURACY WHEN MACHINING HARD-TO-CUT TAPER HOLES ON E D M W R I R E M A C H I N E S Do The Vinh , T r u o n g Tu Phong College uJ Tecimology • T\l' This paper presents experimental results of cutting parameters setting, coordinate adjustment and wire controlling for manufacturing cone holes on EDM machines Mastercam software® has been used to build machining program of taper holes, made from SKD61 Produced errors in terms of straight dimensions, taper angle accuracy and surface roughness data were collected and analyzed The results showed that producing taper holes on EDM wire machines offer better cutting ability, higher accuracy and surface roughness, compared to traditional machining It would be concluded that widening machining ability of EDM wire machines is very promising way lo contribute lo training and technology transfers actions Keywords; cutting feature, wire cutting, material SKD61 Ngdy nhdn bdr.l 1/11/2012 ngdy phdn bien 07/12/2012 ngdy duyel ddng ' Tel 0983 548880, Email- thevinh8880@gmail com 26/3/2013 ... so mdy gia cdng cdt cdn v&i gdc cdn thay ddi: Thiet lap Type muc CUT DATA la (Spe) Dal true Z ve diing vi tri da djnh lap trinh Danh gia sai so va thd''i gian gia cdng Vat lieu chi tiet gia cdng... 166 348 1S a n g Bang ihdi gian gia c