NGHIEN CUfU - TRAO DOI NGHIEN Cl/U ANH HUd-NG CUA CH^ 0 CONG NGHE DEN CHAT LU'ONG B t MAT KHI GIA CONG THEP HOP KIM TREN MAY CAT DAY CUTTING CONDITION'S RESEARCH AFFECTED COME TO GREY IRON SURFACE ROUGHNESS WHEN ABRASION ON SURFACE GRINDING MACHINE ThS Chu Anh Tuan TrUdng Dai hpc Cdng nghiep Ha Ndi TOM TAT Bdi bdo cho thay anh hUdng cua che cong nghe doi vdi den chat liidng be mat vd nang sudt gia cong gia cong thep hdp kim tren may cat day Goldsun, dUdc bang thUc nghiem tren may do nhdm Mitutoyo Tren cd sdphdn tich, tong hdp cd sd ly thuyet thi bdi bdo da thiet lap dUdc cong thdc thUc nghiem xdc dinh moi quan he giUa nhdm be mat, cac yeu to cong nghe gia cong TiC viec sit dung dothivd cac md hinh toan hoc, ta co the danh giddUdc cac yeu to cong nghe dnhhudng den qua trinh gia cdng Ket qua thu dUdc md mot hUdng nghien ci(u khd quan vd khd nang dp dung vao thiic tenhdm nang cao chat lUdng be mat chi tiet gia cong tren may cat day noi chung vd thep hdp kim noi rieng Tii khoa: Cat day tia liia dien; Thep hdp kim; Chat lUdng be mat ABSTRACT This paper shows the impact of technological regimes for surface quality and processing performance when working on steel alloy wire cutters Golden Sun, the experimentally measured roughness tester Mitutoyo On the basis of analysis, synthesis, the theoretical basis of the article has established empirical formulas determine the relationship between surface roughness and technological factors when outsourcing From the use of graphs and mathematical models, we can assess technological factors affecting the machining process The results open a promising research direction and the ability to apply in practice to improve the quality of surface detail when working on general wire cutters and alloy steel in particular Keywords: Wire Electrical Discharge Machining; WEDM; Alloy Steel; Surface Quality TAP CHI CO KHI VIET NAM, Sd nam 2014 www.cokhivietnam.vn NGHIEN CUfU-TRAO D O I cuon lien tuc va chay theo bien dang dinh trUdc de tao mdt vet cat tren phdi PhUOng phap Ngay nay, cung vdi sU phat trien cua khoa thUdng dung de gia cdng cac 16 thdng suot co hpc va cdng nghe tren tat ca cae linh vUc thi cac bien dang phUe tap nhU cac 15 tren khudn dap, san pham cO cang ddi hdi chat lUpng cao khudn ep, khudn due ap lUc, che tao cac dien c^c hon, mUc dp tU dpng hoa san xuat va dac biet la dung cho gia cdng xung dinh hinh, gia cdng cac chinh xac, chat lUpng be mat cua san pham ranh hep, gap khue, cac dUdng kiem, [1], Chinh vi vay gia cdng bang cac cdng nghe truyen thong tren cac may van nang khd cd the y^ dap Ung cac yeu cau cang cao va do sU canh tranh ciia san pham tren thi trUdng bi han che ThUc te dd ddi hdi phai phat trien va nghien eUu cac cdng nghe mdi n h i m nang cao dp chinh xac be mat ndi rieng va chat lUpng san pham ndi 1 chung l.DATVANDE Co Phuong phap gia cdng cat day tia lia dien va gia cdng xung dien ehi xuat hien each day hon nifa the ky, nhien, cae phUOng phap mdi chi dupe ap dung vao san xuat d Viet Nam thdi gan day Mat khac nd phUOng phap gia cdng tien tien nen nhieu nha san xuat chi ban may chU khdng ban cdng nghe Xuat phat tU nhUng nhu eau thUe te dd, chung tdi da manh dan tap trung nghien eiiu khao sat mot so anh hUdng cua cac thdng sd cdng nghe cu the d bai bao la hai yen td "Thdi gian phdng tia lUa dien va cUdng dp ddng phdng tia lUa dien" doi vdi nang suat va dp nham b^ mat cua ehi tiet gia cdng De nham dUa giai phap nang eao chat lUpng be mat chi tiet De tai "Nghien cUu anh hudng cua che dp cdng nghe den chat lupng be mat gia cdng thep hpp kim tren may eat day Goldsun" cd y nghia thUe tien rat cao Ngoai y nghia mang tinh khoa hpc, de tai cdn Ung dung phuc vu trUe tiep cho dao tao dac biet la Ung dung vao thUe te san xuat gia cdng tren may cat day tia lUa dien GIA C O N G SiAngdeh Bom fXnQcathwbnn 5H4tti«r>g«gMiltn CNCvilCiatn CCapAfn BMnWY TTxnh 1.1: Sd nguyen li may cat ddy tia liia dien [2] 2.1 CO che boc tach vat lieu Khi gia cdng cat day, sU bde tach vit lieu dUa tren hieu Ung an mdn xung dien cua cac tia lUa dien xuat hien giUa hai dien cUc (hinh 1.2) Cac tia liia dien tac dung rieng re nhd chat dien mdi SU bdc tach vat lieu xuat hien sii phdng dien tao nhiet dp cao lam nong chay va bdc hoi hai dien cUc Nang lUpng mdt chieu dupe dat vao mot maeh xung vdi dien ap tU 30 den 250 V va tan so 50 den 500KHz tao giUa hai dien cUe dat each mdt khoang ngan (thUdng tU0,01 den 0,5 mm) mot xung vudng [Ij EDE CAT D A Y BANG TIA LLTA I DIEN VA ANH H l / ^ N G CUA NO DEN CHAT LtfONG BE MAT CHI TIET GIA CONG VA I Planu 1 DunsoiC-) N A N G S U A T G I A CONG Cat day tia lUa dien (WEDM - Wire Electrical Discharge Machining) la phUong phap dimg day dan dien cd dUdng kinh nhd {0,1 - 0,3mm) '\ ^ Cb) ^ EM atnmo) «mc Hinh 1.2: SU boc tach vat lieu gia cong cat d&y [Ij TAP CHi CO KHf VIET NAM, S6 nam 2014 www.cokhivietnain.vn NGHIEN CUfU-TRAO Ddi 2.2 Be mat gia cong cat day Trong gia cdng cat day ta cd the d l dang nhan thay cd kieu khe hd phdng dien tdn tai ddng thdi, la: ' Khe hd phdng dien mat trUdc: La khoang each gifla day va phdi dupe theo hUdng tien day, ki hieu la g|' Khe hd phdng dien mat ben: La khoang each giUa day va phdi theo chieu vudng gdc vdi hudng tien day, ki hieu la g|^ a a j MB "T" CK CbKESttlBbEHCon Kich tJjBBs gu seag CbitiiSBaai £k!sn8