NGUYEN ~NH n£:N - vii QUANG H61 A A? TRANG BI•BIEN • - BIEN • TV MAy GIA CONG KIM LOAI NGUYf:N MANH ntN. vO QUANG HOI ,.? TRANG 81•OlEN • - OlEN • Ttf MAy GIA CONG KIM LOAI. (Hi ban Ian 1M saul NHA XUAT BAN GIAO Due L()( NOI DAU Ngay nay trong cdc linh vuc san :wr'it eLI.U n~n klnh til qu6c ddn, co khi hoa co lien quan chqt che den di~n khi hoa va til d(mg h6u. Hai yeu t6 sau eha phep don girin kef cau co kid eua may san xuat, {tmg ntmg suat lao dOng, nang eao chiil luang hi thuq.a trinh san xurft viI giam nhc cl.1ong do lao dong.
Viec fang nang sudt may va giam gla thanh thiel bi di~n Gua may ia hai yeu ci'iu chu yeu doi voi M thOng truyen -dong dien va tlf, d¢ng hoa nhung chu.ng mau thuan nhau. Mc')t ben dOl hoi suo dung cae M th6ng phl1c tap, m6t Den lq.i yeu cilu han chl s6 luang thiet bt chung fren may ua s6 thiel bi cao cap. Vay viec hla ch9n mQt hI! thong truyen dong dien va tz,t d(mg hou thich hap eha may liI 1 hai loan kh6. Sack fiTrang bi dien - dien tit nuiy gia cong kim loq.i" de cqp den phCm dien - di~n hi eua cac may gia cong kim IO{f-i ia nhilng ioq.i may chu yeu va quan trong trong cong nghi,;p n(jng cua nen kink tl quac dan udi 2 loai may: nuiy cal kim iO{f-i va nuiy gia cong kim loai bang ap llfc.
Sach duoc chia lam 2 phan: Phdn I ." Trang b~ di¢n - di¢n tit cac ntliy cdt got kim lO{f-i gam cac nhOm may Ti~n, bao giuong, doa, mai ua may cdt gqt kim ioq.i v6i di~u khicn chUang trinh so'. Phan II : Trang b~ dien - di~n til cac may gia cong kim loai Mng ap h.c, g6m cac may can va dot dq. 6 moi IO{f-i may, sach trinh bay co hi; thong cac dtj.c diem lam uiec, phuong phap xac d~nh phu tai, cong suat d~ng co truy"~n dong cho may, cae d(jc dilm ua yeu cau doi u6i hi; thong trang bi di~n - dien tit cUa miiy, cac khdu dieu khien dien hznh va m~t s6 so do d(eu hhUn cae may cu tM trong thlfe tl. Sach dUQc dung lam tai lieu h9C t{).p ehinh eho sinh vien chuyen nganh TIf.
d¢l'g hoa, d"6ng thOi co tM lClm [iii lieu tham khdo cho can b~ cong tac trang linh VIf.C Til dong hoa, Trang bi dii;n cae may san xuM Sach do cac can b¢ gidng df!y eua Khoa TIf. dong hoa lGYCN - Truong D{f-i hoc bach klwa bien sot;ln. Nguy~n Manh Tiln chu bien va uUt pM.n I, va Quang Hoi viet phan II. PTS Nguy~n Van Lien dd dQC ban thao va dong gop nhieu j kiln qui briu.
Cac tiIC gia rtft uui long nMn cac j kien phe binh va dong gop j kien nht;n xet cho cuon sach de tiep tuc chinh li va tcii ban Zan sau. dong hoa XNCN - Truong DHBK HiJ. Cae tac gia 3 PHAN I A • TRANG BI. - DIJi:N TU ~ MAy CAT KIM LO~I Chuang 1 KHAI NI~M CHUNG §l.
PHAN LOM MAy d. May cat kim lo~i dU9C dung dg gia c6ng cae chi WIt kim lo~i bAng each cat hat cae lap kim lo~i thuR, de sall khi gia cbng chi ti~t co blnh dang gAn dung y~u dtu (gia c6ng th6) ho~c thoR man hoan toan yliu Call d$t hang v6"i dl) chinh xac nhiH dtnh vl'! kich thuac va dl) bong diD thiel cua M m$t gia c6ng (gis ding tinh). Phan lo~i cae may cat kim lo~i thea sa d6 hlnh i-I. - Tuy thw}c vao qua trlnh c6ng ngM d~c trung Mi phuong pM.p gia cOng, dl;\ng dao, d$c dnh chuy~n d¢ng V.
, cae may cAt dllQ'C chia thanh cae may co bAn: ti~n, phay, bac, khoan - doa, mai va cae nhern may khac nhU: gia c6ng rAng, ren vlt V. - Thea d~c di~m cua qua trinh san xulIt, co th~ chia thanh cae may VI;\D nang, chuy~n dung va d$C bi~t.ng la cac may co thi1' th1}C hitn dUQc cac phuang phap gia cOng khac nhau nhu ti~n, khoan, gia c6ng rang v. , d~ gia c6ng cac chi tiet khac nhau vl'! hlnh d~ng va kich thuO'c. Cac may chuyl!n dung la cac may d~ gia c6ng cac chi ti~t co ciIng hlnh dang nhung co kfch thu:6'c khac nhau.
May d~c bi~t la cac may chi thl,tc hi(!n gia cOng cac chi ti~t co cung hlnh dang va kich thuO'c. - Theo kfch thu6"c va trQng IUQng chi ti~t gia rong t~n may, co th~ chia may cat kim la~i thanh cac may blnh thubng (trQng IUQng chi ti~t 100 + 10.10 3 kG), cac may cO' 100n (trQng lUQng chi ti~l 10.103 kG), cac may cCl m)ng (trQng IUQng chi ti~t 30.103 kG) va cac may r,!{t OI)ng (trQng IUQng chi tiet 16"n helD 100. - Thea dO chfnh xac gia cOng, co th~ chia thanh may co d¢ chfoh xac bloh thuong, caa va rat caa. 5 , J MAYCATKlMLV'AI tJ~' ch'~hxoc Doc Qr'em tJpc di~m 1U(/ Trong /(/o'flg PU' ftld /r/;'h [ cong "She- 10;';' sun.i:ut7""/ hih //'i/t/cc/,i//c-l 910 conY' ~I ~ '- {~! "- '".
Srl d6 ph~n joron ciie m;"!y cil. CAC CHUYEN DONG vA CAC DANG GIA CONG DIEN HiNH TREN MCKL Tr~n MCKL co hai loai ohuyen dong chu y~u Chuyen d¢ng co ban va chuye'n d¢ng ph~. Chuyen dt)ng Cd ban 1il sl! di chuyen wong doi ella dao cat so voi ph6i de dam baa qua trinh d. Chuye'n d{mg nay bid chia ra : chuyen d¢ng chinh va chuyen d9ng tin dao.
- Chuyen dong chinh (chuye'n d¢ng lam vi~c) III chuyen di?ng dna dao cat an vaa chi tieL - Chuyen d9ng an dao 18. cae chuyen dQng xe dich ella iuoi dao ho~c ph6i de t~o ra m¢t lop phoi moi. Chuyen d9ng ph\! ill nhii'ng chuyen dong kh6ng lien quan trl,1c tiep den qua trinh dt g9t, chung can thiet khi chuan bi gia c6ng, hi~u chinh may, v. v', Vi d\l ; di chuyen thanh dao ha~c ph6i, nang h;;t xii.
cua may baa giubng, kep dau truc may khaan v. Cac chuye'n dong chinh, an dao co the la chuyen dong quay ho~c chuyen dong tjnh tien Cl'ta dao ho~c phoL Tren hinh 1-2 la cac dQ,ng gia cong dien hinh dUQ"C thl,1c hi~n tren MCKL ; May ti~n (hinh 1-2a) ; may baa giubng (hinh 1-2b) ; may phay (hinh 1-2c) ; may khoan (l-2d) va may mai (hinh 1-2e). Co the' Lay vi du dQ,ng gia cong tren may ti~n (hinh 1-2a) ta thay ; chieu clla chuyen dong chinh 1 iii. chuyen dong quay clla chi tiet gia cong 3 ; chuyen dong {In daa 2 IA sl! di chuyen clla daa 4.
C;lC lbn~ ~'" L(\n~ dl<~n hmh In'·" "le,,1 Chlt:u eua dmy0n ,Wng chinh ; 2 - Chi6.J ella chuytn dOng :1n \.3', LlJC CAT, TOC DO cAT VA CONG SUAT cAT L1)C catva toe d~ cat phI,! thu('lc vao cae y€'u ttl eua di~u ki~n gia c6ng nhtl : chicu sau cat t, iUQng a.n dao s, be TOng ph6i b, db ben dao cat T, v~t li~u chi ti(it hlnh dang va v~t Ji~u dao, dieu ki~m Lilm mat V,v. Chung dt19'c xAc dinh thea cae c6ng thuc kinh nghii,'!m ung voi ti1ng nhom mfty. Tuy nhien, cae cong thuc do co dQ.ng gan gi6ng- nhau, nen ta lAy gia cong ti~n lam vi d1,l di('ll --',. Tren hlnh 1-3 gidi thieu cae phAn tu \':1 d~i hlQng d~c trung cho gia c6ng tWn.
Toe d9 e~1 Toe dQ cit lit toe d~ chuye'n d¢ng dili t\ldng dBi ella chi tiet so voi daa cat t~i die'm th?'p xuc giiia chi tiet va dao. No duQ'c xac i djnh theo c5ng thuc kinh nghi~m C, [m/phl (1-1) Hinh /-3, Cae ph!\n llJ va U,lJ ItJ'\!l~ d. f\ ,Sf, cho gli! dIng lien 7 trang do t - chieu sau cAt, mm ; s - Iuqng an daa, lA dQ dich chuyen cua daa khi chi ti~t quay duqc m(lt yang, mm/vg; T - de. ben daa III thbi gian lam vi~c cua daa giua hai Ian mai daa ke tiep, ph ; CY ' xv> Yv' m - lit M s6 va s6 mli ph\! thu9c vaa vl}t Ji(m chi ti~l, v:;i.t li~u daa va phuong phnp gia congo 2.
lJ,rc clot Trang qua trinh gia cOng, tl;ti diem tiep xuc giua chi tiet va daa co mOt ll,tc tac ~ ~ng F, h,tc nay duqc phAn ra 3 th!lnh ph fin (hl.nh 1-3) : Ll,l"c tiep tuyen (ll,l"'£" cat) F 7 Ie. ll,tc mil tr\lc chl:nh (truy~n dljng chinh) pha.i khac phl,lc, I~c huang kinh F y tt;lO ~ ap l\l'e l/!m ban dao, ll,l"c dge trl,lc (Il,tc An daa) Fx rna co diu An daa phai kh~e ph1,lc. --- - F = F z + Fy + Fx' [N] (1-2) De tlnh ll,tc cat ta dung cOng thlie kinh nghi~m sau (1-3) trang do : CF, x F' YF' n - h~ 86 vll cae s6 mG phl,l thuQc va~ v(i.t li/ilU chi tiet, v~t li~u daa vll phuong phap gia congo Cac ll,l"c F x' Fy eGng xac djnh thea cae cOng thlie tuong tl,l" nhu (1-3). Khi dnh toan sel b¢, co the lay F x, F y thea tl l~ sau ; F z : F y ; F x = 1 : 0,4 : 0,25 (1-4) 3.
Cong suat clot C6ng suat edt (c6ng suat yell ctlll eua cd cau chuyen dOng chlnh) dUQ"c xac dinh thea cOng thlic ; (1-5) 4. Thai gian may Thoi gian may lA thai gian dung de gia e6ng chi ti~t. No con duqc g9i Iii thai gian c6ng nghl;l, thbi gian Cd ban ho~ thai gian huu leh. De dnh toan thai gian may, ta phai cAn CU" vao cac y/!"u t6 cua cM dl! cAt g9t va phuong phap gia e6ng.
VI dl,l voi may ti/iln : L [ph] ([ -6) n.s trang do L - chi~ll dlli hanb trlnh lam vi/ilc, mm n - teSc dO quay cua chi tiet vg/ph. 8 Neu thay vao (1-6) gia trt ta co (1-7) trong do d - duong kinh chi tiet gia c6ng, mm. Tu (1-7) ta thay muon tilng nang su::It may (gi3.oc dQ cat va IUQng an dao. Do do nguai ta ap d\lng phuong phap cat cao t1c.
PH]) TAl CVA DONG CO TRUYEN DONG cAc CO CAU DIEN HtNH 1. Co cau truy,," di?ng chfnh Trang truyen dOng chinh clla MCKL, llfc cat la Ilfc huu ich, no ph\l thu9C vao chc d9 cat (t, s, v), v~t. li~u chi tiet va dao. D6i yoi chuyen d<)ng chinh 1ft chuyen d<)ng quay nhu a may ti~n, doa, phay, khoan va mai, momen tren trl,lc chinh clla may dUQc xac dinh thea cang thuc : (1-8) trong do F 7.
- llfc dt, N ; d - duong kfnh cua chi tiet gia cang hoi;i.c phai, m Mamen huu fch tren tr\lc d9ng cO Ill. : Mj Fz·d ~-=2i" [NmJ (1-9) i - ti so truyen tu trl,lc d9ng cO den trl,lc chlnh cua may.