Tran Van Han - Can Trung Dinh TRAN VAN HAN - CAN TRUNG DINH HlfCJNG DAN DAY NGHE ■ KY THUAT MOC TAY ■ ■ NHA XliAT BAN NONG NGHTEP Chiu trach nhi£m xuSt ban NGUY§N CAO DOANH Bi£n tSp ban thao lelan Trinh bay bia APUNDESIGN nhA xuat bAn nAng nghi£p 167/6 Phirong Mai - Dtfng Da - Ha N61 DT: (04) 5761075 - 8521940: Fax: 04.5760748 CHI NHANH NXB NONG NGHlfiP 58 Nguyen Binh Khiem - Q1 - Tp. H6 Chi Minh DT: (08) 8.9101036 HUdNG DAN DAY NGHE KY THUAT MOC TAY ■ ■ In 1000 ban kho 16 x 24 tai Nha in Khoa hoc va Cong nghe. Quyet dinh in so: 158/QD- NN ngay 06 thang 08 nam 2008. S6 dang ky KHXB: 229-2007/CXB/593-21/NN.
In xong va nOp lun chi^u ttang 9/2008. LCJl NOI DAU Cuon “Ky thuat moc tay” cung c£p nhung kien thufc ccf ban vc ky thuat gia cong cac san ph£m moc bang phirtfng phap thu c6ng. Day la cuon cam nang bd fch gitlp cho nhttng ngucfi co nhu cau co the hoc va lam dirge cac san ph&m m6c dan dung being cac dung cu thu cong m6t each hieu qua. Noi dung cua cutfn sach nay bao gom: Chuefng I; Khai niem v& san ph^m mdc Chirang II: Cac loai dung cu thu cong Churon g III: Ky thuat gia c6ng chi tt6t Chirong IV: Ldp rap san phdm Chuefng V: Trang sire be mat Trong qua trmh bien soan, chung toi da tham khao nhicu tai lieu, di thuc tc tim hieu va dirge sir giup da cua nhieu ban dong nghiep.
Do thefi gian han che va trinh do co han nen khong tranh khoi nhung thieu sot rat mong dugc su don nhan va dong gop y kien bo sung dc tap cuon sach nay dugc hoan chinh hefn trong lan tai ban sau. Xin tran trong cam on. Bien soan: Tran Van Han Tham gia: Can Trung Dinh 3 CHITONG I. KHAI N1EM VE SAN PHAM MOC i: nhung yeu cau doi v6i sAn piiam moc 1.
Yeu cau ve sir dung 1. Yeu cau ve cong dung Mot san pham m6c khi san xual ra dcu co chtrc nang rieng biet. Vi v&y kfch thir6c cua san pham phai phu hop vcri doi tucmg sur dung. Hinh thirc, hmh dang cua san pham phai hai hoa can doi phu hop vcri cong dung cua no.
Vi du: San phcim diu. la ban nhung co rat nhieu loai ban, chdng han: - Ban lam vice: Kich thude cua ban phai phu hop, sao cho ngucri ngoi lam viec duoc thoai mai, khong bi go bo, it moi, du di£n rich lam viec. - Ban tra: Kich thu6c cua ban phai phu hop dap ufng duoc cong dung cua no nhu: du dien rich di dat am, chen, phich. Yeu cau ve do ben Do ben cua mot san phtfm co quan he chat che vcri cong dung cua no.
Neu san ph^m chiu tac dung luc lcrn ta phai chon g6 co cudng 66 chiu luc cao, k£t cau cua san pham phai du do ben. San pham co tac dung de trang trf thi ta phai chon loai g6 co van th6 dep. Nhung v5n phai dam bao ket cau cua san phdm la ben nh&t. Noi chung muon cho san phlm dam bao duoc yeu cau ve do ben, ngoai yeu cau ve chon go trit, con phai tmh toan thiet ke cac chi tiet c£u tao nen san phdm dam bao do ben, dep, hai hoa can doi.
Yeu cau ve tham my - Dang cua san pham moc phai thanh thoat, hi6n dai ma van mang duoc nhung net dac thu cua dan toe. - Mau sSc va v£n th6 cua cac chi tiet lien ket vcri nhau phai hai hoa phu hop vcri yeu cdu ve trang tri. - Kfch thuefe cua cac chi tiet va san pham phai hai hoa can doi dap ring duoc vcri yeu ciu su dung. - MOi san pham moc, ngoai yeu ciu vi sir dung, cong co tac dung trang trf.
noi that, vi vay trang stic be mat san pham phai dat yeu c£u ky thu&t nhat dinh, vira co dO bong cao, co mau sSc hop Iy phu hop vcri cOng dung va thi hieu cua ngucri su dung. Yeu cau ve kinh te 3. Yeu cau ve tiet kiem nguyen lieu - G6 to khong dung vao Viec nho; G6 dai khong dung vao viecngdn - Tang circfng tan dung g6 phe lieu trong dieu kien cho phep cua san ph&m, bang cac bien phap: Noi ghep g6 nho thanh go 1dm, go ngdn thanh g6 dai - Thirc hien tot tieu chiton hoa trong qui trinh san xuat - Kct hop giGra nguyen lieu g6 vdi cac nguyen lieu khac, giua g6 tu nhicn vdi g6 nhan tao 3. Yeu cau ve tiet kiem nhan cong - Chon hinh dang san phim don gian ma win dam bao duqc do b6n dap - Chon dung sai kfch thuck: va iuong du gia c6ng hop ly - N^ng cao trinh do co giefi hoa va tu dong hoa trong san xuat - Chon phuong phap lap rap va qui trinh hop ly II.
CACH CHON NGUYEN LIEU CHO SAN PHAM MOC 1. Can cur vao do ben va cong dung Oe chon nguyen lieu duoc dung, chrnh xac. Trudc khi san xu£t phai biet duoc c6ng dung cua san ph^m va san pham duoc dung trong di£u kidn nao ma ta quyet dinh chon g6 cho tot. Vi du: Neu san phim chiu luc tac dung ldn thi chon g6 co cudng do chiu luc ldn.
Neu san ph&m co tac dung di trang tn la chu yeu va chiu luc tac dung nho nen chon loai g6 hay phan g6 co van thd va mau sac dep. Can cur vao dieu kien sir dung Khi chon nguyen lieu cho san pham, can cur vao dieu kien sir dung cua san pham, trong nha hay ngoai treti, sir dung l&u nam hay tarn thdi. Moi trudng sir dung (nude ngot, nude man, moi trirdng axit hay baza). Cong dung rieng ma chon loai g6 co the dap ting duoc cac dieu kien do.
Vi du: San phim la d6 dung trong nha, chon loai g6 co cirdng dd chiu luc kha, g6 it bi cong venh, nut ne, kha nang co dan nho, van thd, mau sdc dep, it bi sau nam xam nhap nhu (mot, moi.) - San ph^m dung*ngoai trod co khi hau thay ddi dot ngot, nen chon loai go it bi cong venh, nut ne, co kha nang chong dirpe cac loai s&u nSm sam nhap. - San ph&n dung mdi trudng co do am cao (tau, thuy^n). Chon loai g6 co cudng do chiu luc cao (tinh deo cao), kha nang hut nude va thSm nude kem. LUONG DLr GIA CONG TRONG SAN XUAT HANG M0C 1.
Hinh nghla Lirong dir gia c6ng la phan g6 chenh lech giua kich thirdfc ph6i va kich thudc danh nghla cua chi tiet Qua thyc te chung minh cho Iha'y lirong dir gia cong cua chi tiet di theo cac chi£u nhir sau: Luang du theo chieu ddy va rong 5-r7mm; Luong du theo chi£u dai 15-t-20mm 2. Phan loai luong dir gia cong - Luong du gia cong lh6 va linh: La toan bo lucmg g6 thira ra tren chi tiet so v6i kich thudc danh nghia, luong g6 thira ra nay dung gia c6ng thfi va tinh. - Lucmg du gia cong sua chtra: La phan gd di chinh ly san phdm. Neu Irong qua trinh gia cong dam bao chinh xac thi luong du gia cong sua chua bang khong - Luong du gia cong s£y kho: La phan g6 thira ra de say khd chi ti£t 3.
y nghla cua luong du gia cong Luang du gia cong co y nghia quan trong n6n phai tinh toan ti my cho thich hop vi luong du gia cong co anh hucfng true tiep den chat lumig san pham, tiet kiem nguyen lieu, nang suat lao dong va gia thanh san ph<im. - Neu dc luong du gia cong Ion chat lucmg san pham dam bao, nhimg khong tiet kiem duoc nguyen li£u, nang sua't lao ddng tha'p va gia thanh san pham cao. - Neu de luong du gia cong qua it: Nang sua't lao d$ng cao, ti£t ki£m duoc nguyen li£u nhung chat luong san pham kho dam bao, co the ty le phe pham nhiCu. Nhung can cur xac dinh luong du gia cong De tinh toan luong du gia c6ng hop ly can dua vao nhung can ctf sau: - So luong may, edng cu ma chi ti£t phai qua cac khau gia c6ng - Tinh trang may, dung cu va cha't luong edng cu cat got - Trinh d6 ky thuat cua cong nhan - Chat luong g<5, d6 im g6 6 CHlfONG II.
CAC LOAI DUNG CU THU CONG I. NHUNG DUNG CU DO, VACH MUC 1. Cdng dung: Dung do chi£u dai, dfiy, rdng cua chi ti£t hoac san phdm 7. Can tqo - Thuoc met dirge lam bang nh6m, hop kim hoac g6, thirdng co 3 loai: dai lm, 1,5m, 2m co canh thang.
Tren b6 mat cua thirdc co chia thanh cac vach mm, cm, dm - Loai bang nhdm lm, co the dirge chia thanh 5 la hoac 10 la, tren cac la co chia cac vach mm, cm, dm. Cac la lien ket veri nhau bang dinh tan co the7 ga'p lai dirge. * Chu y: d6i v6i loai thucfc co 5 la hoac 10 la khi do m6i do thircrc ra, do xong gap lai ngay tranh va cham lam thirdc bj sai s6. Hinh 1: Thirdc met 2.
Cong dung: Dung d£ kiem tra cac goc vu6ng cua san ph£m hay d6 vu6ng goc cua chi tiet. Dung dd vach da'u cac chi tie't khi lay muc. Can /go - Thude vuong thudng lam b&ng g6, c6 the bang kim loai. Gom co hai chi tiet la la thude va sue thude duac lien ket vdi nhau bang mong th&ng, co hai mat vuong goc vdi nhau.
- Chieu ddy cua la thuac S = 5+8mm; Chi6u day cua sue thude gap 2,5 l£n chieu diy cua la thuorc. Chieu dai cua sue thude bang 2/3 chi6u dai cua la thuac va chieu dai cua la thude thudng tur 2CH-25cm. con chieu rdng diroc chon cho can doi vdi chieu dai cua sue va la thude. Hink 2: Thude vuong L Sue thude 2.
Cach thu thuac vuong Muon kiem tra 66 vudng goc giua sue thude va la thude, ta bao thang canh mot thanh g6, ap sue thude vao canh thang dung but chi vach mot dudng theo canh la thude, roi lat thude Iai ap sue thude ve phia ben kia va dich dan cho canh la thude tien sat dudng muc vira vach. N6'u canh cua la thude trimg vdi dudng vach do, chufng to do vuong cua thude chuan, neu dau la thude trung vdi muc, 6&u giap sue thude chua chain tdi muc la thude bi thach va ngucc lai, thude bi qu&p. 8 Hlnh 3: Cdch thitthit&c vudng 3. Cdng dung: Dung de vach mire va do goc dd baft ky 3.
Cdit tao Cung co la thtrdc va sue thirefe nhu thirefe vudng, nhurng sue thtfcrc dai hem la thirdc. Chung li£n kd't vefi nhau bang bu ldng va dung tai hong dd dd thao long, van chat khi sir dung.