Bao Cao Thuc Tap Tot Nghiep Nganh Oto

Bo co thc tp tt nghip

Cng ty CPhn TM-DV Ph Mn

MC LCTrang

Li cm n ---------------------------------------------------------------------------- 2 Li ni u ---------------------------------------------------------------------------- 3 Li nhn xt ca cng ty ------------------------------------------------------------ 4 Li nhn xt ca gvhd --------------------------------------------------------------- 5 Gii thiu cng ty -------------------------------------------------------------------- 6 Nhim v v chc nng ------------------------------------------------------------- 7 C cu b my cng ty -------------------------------------------------------------- 8 NI DUNG THC TP 1.Quy trnh bo dng cc dng xe ------------------------------------------------ 10 2.Cc h hng thng gp gm t -------------------------------------------- 23 3.Cch tho v sa cha my khi ng ------------------------------------------ 28 4.K thut ch nhm ------------------------------------------------------------------ 40 5.K thut sn xe ---------------------------------------------------------------------- 42 Kt lun ------------------------------------------------------------------------------- 45

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LI CM N Trong thi gian thc tp em tm hiu c r hn mt s vn thc t v cch thc lm vic ca cng ty, quy trnh bo dng sa cha nhng dng xe t trn th trng .iu lm cho kin thc ca em dn c cng c hn. Trong khi thi gian hc trng l tng i t .Nhng nhng kin thc l thuyt cng l nn tng phc v lu di cho qu trnh hc tp ,nghin cu v lm vic sau ny.em xin chn thnh cm n ban gim c cng ty TM-DV ph mn to iu kin cho em c lm vic v hc hi trong thi gian qua. Em xin chn thnh cm n s hng dn tn tnh ca thy V Lm Kim Thanh ngi trc tip ch dn chng em trong sut qu trnh thc tp. Em xin cm n cc thy c trong khoa ng lc,cc thy c ca trng i hc Cng Nghip Tp.HCM ging dy nn tng cho em sut nhng nm qua.Cun bo co thc tp l mt s kin thc nh em hc hi trong qu trnh lm vic. Em rt mong nhn c kin ng gp ca qu thy c .

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LI NI UQua thi gian thc tp hn mt thng ti cng ty TM-DV Ph Mn, em rt ra c rt nhiu kinh nghim thc t m khi ngi trn gh nh trng em cha c bit. c kin thc v kt qu thc t ngy hm nay, trc ht em xin chn thnh cm n cc thy c gio trong trng i hc cng nghip TP.HCM,cc gio vin trong khoa ng Lc ging dy v trang b cho em nhng kin thc c bn, ng thi tn tnh hng dn em trong qu trnh thc tp. Bn cnh , em xin gi li cm n chn thnh n ban gim c cng ty gp v to mi iu kin thun li gip em hon thnh tt qu trnh thc tp. Trong qu trnh thc tp v lm bo co, do cn thiu nhiu kinh nghim thc t nn khng trnh khi nhng sai st. Em mong cc thy c ch bo thm gip em hon thnh v t kt qu tt hn. Em xin chn thnh cm n! Tp.hcm thng 03 nm 2010 SVTH Nguyn Ngc Ht

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NHN XT CA GIO VIN HNG DN .. .. .. .. .. .. .. .. .. .. .. .. .. ..SVTH: Nguyn Ngc Ht5

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GII THIU V CNG TY C PHN TM-DV PH MNTn cng ty : CNG TY C PHN TM-DV PH MN Cng Ty C Phn TMDV Phu Mn c s k hoch u t TP.HCM thnh lp theo gi y phep ng ki kinh doanh s 4103010207 do s k hoa ch u t TP H Chi Minh c p ngy 5/05/2008. Vi i ngu nhn vin va th b c cao lanh ngh trn 100 ngi, c xng ng mi thung xe , ci to v hon ci cc loi xe chuyn dung, m t b ng va showroom trng bay xe r ng 1000 m2 v xng ng thung v i tu xe rng trn 2000 m2.Cng ty co u kha nng ap ng c cc nhu cu hin nay ca khch hng. Cng ty c ph n thng ma i dich vu Phu Mn la a i li phn ph i chinh thc cua nh my t HUYNDAI ng Vng. Chuyn nh p kh u cac loa i xe chuyn dung cu thng, ch ti n, cu h , tr n b tng Cua hang HUYNDAI. Kinh doanh cai ta o ong mi cac loa i xe chuyn dung: xe tr n b tng, xe ch xi mng ri, xe hut ch t thai, xe ch hoa ch t, xe ti ng , xe ch xng d u Cng ty c ph n thng ma i dich v ph mn c quyn phn phi cc loi xe ti ISUZU, HINO, MITSUBISHInh p kh u chuyn dung trn toan qu c. Cng ty chuyn ban xe t, xe g n may va phu tung , ong mi va cai ta o xe chuyn dung. Tr s chnh:79/43 ng s 51 phng 14 qu n Go V p, TP. H CHI MINH i n thoa i: 0862971472 FAX: 0862971471 Website: http://otophuman.com Chi nhnh :1004A ng u C,F Ph Trung,Q.Tn Ph,TP.HCM

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Nhim v v chc nng a. Nhim v : Hot ng kinh doanh theo ng ngnh ngh ng k, ng mc ch hot ng cu cng ty. m bo pht trin vn, li nhun trong qu trnh kinh doanh Thc hin y cc ngha v i vi Nh nc. Thc hin phn phi theo lao ng, chm lo ci thin i sng vt cht, tinh thn nng cao trnh vn ho chuyn mn ln nghip v cho cn b cng nhn vin. b. Chc nng : CNG TY C PHN TM-DV PH MN l Cng ty TNHH vi chc nng mua bn, bo dng v s ch ,ng thung cc mu thung cc loi xe t, xe c gii, xe c ng c v ph tung, linh kin v cc b phn ph tr. M ti khon theo quy nh cu Nh nc. Xc nh gi c hp l theo th trng ng thi m bo li nhun trong kinh doanh.

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C CU T CHC B MY QUN L V MI LIN H GIA CC PHNG BANBAN GIM C

a.S t chc :

PHNG KINHDOANH

PHNG K TON

P. T CHC HNH CHNH

XNG NG THNG

T K THUT

T NG KIM

T BO V

b. Nhim v v chc nng cu b my qun l : c hiu qu trong cng vic, to uy tn vi khch hng, m bo nng sut cao, cht lng tt nhm nng cao tinh thn trch nhim cu cc b phn trong cng ty. Nhim v cu tng b phn c phn b nh sau : Ban gim c : ng u Cng ty l Gim c l ngi c Nh nc giao trch nhim qun l ton din cng ty, chu trch nhim v ton quyn quyt nh mi hot ng sn xut kinh doanh cu cng ty, chu trch nhim trc Nh nc, trc ton th cn b cng nhn vin cu cng ty v ch , chnh sch tin nong lao ng v kt qu hot ng sn xut, kinh doanh cu cng ty. Trc tip iu hnh ch o mi hot ng cu cng ty nh ch o cng tc k hoch thanh tra bo v, t chc cn b thi ua, khen thng, o to, qun l k thut v ti chnh, gii quyt cc mi quan h trong b my qun l. Gim c c quyn quyt nh t chc b my qun l trong cng ty. Phn xng ng thng :

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C trch nhim lm vic theo k hoch m ban gim c ra. Vn hnh my mc thit b hp l cng vic tin hnh theo yu cu khch hng t kt qu cao nht. Qun l v bo tr cc loi my mc thit b theo nh k v s ch khi c s c xy ra .T k thut :

T ny c chc nng kim tra cc dng xe a vo cng ty, bo dng sa cha cho cc dng xe mua ti cng ty

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PHN NI DUNG1.QUY TRNH BO DNG DNG XE HYUN DAI, DAEWOO I Kim tu k thut: A. Kim tra v iu chnh: 1- Kim tra s r r ca h thng kh nn, nhin liu, du bi trn ng c, nc lm mt, tr lc li hp, h thng thu lc nng thung xe... 2- Kim tra s lm vic ca cc ng h, h thng tn hiu ,ch lm vic ca xe. 3- Kim tra v iu chnh lng cc khp cu ging , gc quay t do ca vnh. 4- Kim tra iu chnh hnh trnh t do ca bn p li hp v bn p phanh. 5- cng dy ai truyn ng 6- kim tra h thng kho ca, nng h knh, nng h bung. 7- Kim tra p lc hi ca bnh xe. 8- Cc trang thit b an ton. B. Xit cht: 1- Gi cho ng c, hp s, cc loi bm, my pht in, my khi ng 2- Bu lng lp ng ng x, ht, kt mc du, kt mc nc. 3- Bu lng mt bch cc ng, bu lng mt bch cu ch ng, mt bch trc lp 4- Bu lng bt hp li, cc khp ging cu li 5- Bu lng quang nhp, c nhp, kp nhp, gim xc. 6- Bu lng gi h thng phn phi hi phanh. 7- Bu lng bt cc x ngang v dc vi khung xe, cc thung cha nhin liu, cc bnh kh nn. 8- Bu lng u cc bnh in C. Bm m: Tt c cc v tr - M bm: 2,2 kg II. Bo dng cp 125 gi: A, Kim tra vi iu chnh:SVTH: Nguyn Ngc Ht10

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ng c: 1. B sung du bi trn ng c. C sau 2 ln bo dng cp 125 gi ( tng ng vi 250 gi) thay du ng c v phin lc. Kim tra kn ca h thng kh nn, du bi trn ng c, dung dch lm mt v b sung dung dch lm mt. 2. V sinh cc li lc v li phin lc nhin liu, kim tra, lm kn v x kh. 3. iu chnh cng dy ai truyn ng 4. V sinh bu lc gi, thay du v kim tra kn ca h thng ht H thng li 1. Kim tra v iu chnh: - lng cc khp cu ging li - lng ca cc trc khp chuyn hng li - lng ca khp cc ng li - Gc quay t do ca vnh li 2. Kim tra kn ca h thng du tr lc li, v sinh phin lc v b sung du tr lc li H thng phanh: 1. Kim tra tnh trng lm vic ca ton b h thng 2. Kim tra kn ca h thng kh nn 3. Kim tra kn ca h thng phanh du 4. Kim tra v iu chnh: - Hnh trnh t do v hnh trnh lm vic ca bn p phanh, tay phanh - Khe h gia m phanh vi tang phanh H thng in: 1. V sinh v thng cc l thng hi, xit cht v bi m cc u cc ca bnh in 2. Kim tra s lng dung dch in phn v b sung 3. Kim tra s lm vic ca my pht in, my khi ng in v tnh trng cc cm dy, cng tc, cu ch v cc thit b in khcSVTH: Nguyn Ngc Ht11

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4. Kim tra, sa cha v iu chnh cc thit b chiu sng. Cc h thng khc: 1. Kim tra, iu chnh hnh trnh t do v hnh trnh lm vic ca bn p li hp 2. Kim tra lng cc mi ghp then hoa v cc khp ch thp ca cc ng truyn lc. 3. Kim tra tnh trng k thut ca h thng treo4. Kim tra kn v b sung du cho cc hp s, cc cu ch ng B. Xit cht: 1. Bu lng gi ng c, hp s, cc te ng c, cc loi bm, my pht in 2. Bu lng lp cc ng ng x, ng ht, kt mc du, kt mc nc 3. Bu lng mt bch bi kim, mt bch cc ng, bu lng mt bch cc cu ch ng 4. Cc bu lng bt hp , gi ct v khp cu ging , xi lanh tr lc li, 5. Cc khp cu ging cu, quang nhp, c nhp, kp nhp, gim xc, gi v u cu thng bng 6. Bu lng gi bu phanh, bu phanh, gi c cu phn phi hi phanh v cc van ca h thng phanh, cc bnh cha kh nn 7. Bu lng bt cc x ngang v dc vi khung xe, bm, xi lanh, khuu nng thung xe, cc thung cha nhin liu v cha du C. Bm m: Bm m vo tt c cc v m nh mc ph tung vt t: - Du diesel 01 lt - Du dng c: 20 lt ( nu thay) - M: 2,2 kg - Gi lau: 0,5 kg III. Bo dng cp 500 gi: A, Kim tra vi iu chnh: ng c: 1. Thay phin lc v ton b du bi trn ng cSVTH: Nguyn Ngc Ht12

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2. Kim tra kn ca h thng nhin liu, du bi trn ng c, dung dch lm mt v b sung dung dch lm mt, kim tra van hng nhit. 3. V sinh cc li lc v thay phin lc nhin liu, kim tra, lm kn v x kh. 4. iu chnh cng dy ai truyn ng 5. V sinh bu lc gi, thay du v kim tra kn ca h thng ht. H thng li hp 1. Kim tra v iu chnh: - lng cc khp cu ging li, xi lanh tr lc li hp - lng ca cc trc khp chuyn hng li hp - lng ca cc ng li hp - Gc quay t do ca vnh li hp 2. Kim tra kn ca h thng du tr lc li hp, v sinh phin lc v b sung du tr lc li hp. H thng phanh: 1. Kim tra tnh trng lm vic ca my nn kh v c cu tr lc phanh 3. Kim tra kn ca h thng kh nn 4. Kim tra kn ca h thng phanh du H thng in: 1. V sinh v thng cc l thng hi, xit cht v bm m cc u cc ca bnh in 2. Kim tra nng ,s lng dung dch in phn v b sung 3. Kim tra s lm vic ca my pht in, my khi ng in v tnh trng cc cm dy, cng tc, cu ch v cc thit b in khc 4. Kim tra, cc thit b chiu sng v iu chnh lung a pha. Cc h thng khc: 1. Kim tra, iu chnh hnh trnh t do v hnh trnh lm vic ca bn p li hp 2. Tho np, kim tra v iu chnh cc moay , b sung m cc moay . 3. Kim tra lng cc mi ghp then hoa v cc khp ch thp ca cc ng truyn lc. 4. Kim tra tnh trng k thut ca h thng treoSVTH: Nguyn Ngc Ht13

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5. Kim tra kn v b sung du cho cc hp s cc cu ch ng, gi trung gian trc cc ng 6. Kim tra bo dng h thng kho ca 7. Kim tra bo dng c cu khuu nng thung xe 8. Kim tra bo dng h thng nng lt ca bin B. Xit cht: 1. Bu lng gi ng c, hp s, cc te ng c, cc loi bm, my pht in, my khi ng 2. Bu lng lp cc ng ng x, ng ht, kt mc du, kt mt nc, b tng p 3. Bu lng mt bch bi kim, mt bch cc ng, bu lng mt bch cc cu ch ng 4. Cc bu lng bt hp li hp, gi ct li hp v cc khp cu ging li, xi lanh tr lc 5. cc khp cu ging cu, quang nhp, c nhp, kp mhp, gim xc, gi v u cu thng bng 6. Bu lng, gi c cu phn phi hi phanh v cc van ca h thng phanh, cc bnh cha kh nn, bu lng bt tng phanh du 7. Bu lng bt cc x ngang v dc vi khung xe, bm, xi lanh, khuu nng thung xe, cc thung cha nhin liu v cha du C. Bm m: Bm m vo tt c cc v m nh mc ph tng vt t: Du diesel 05 lt Du ng c 20 lt Phin du ng c 01 ci Phin lc nhin liu 01 ci M bm 2,2 kg M moay 4kg Gi lau 01 kg IV. Bo dng cp 1000 gi: A, Kim tra, iu chnh v xit cht:SVTH: Nguyn Ngc Ht14

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ng c: 1. Thay phin lc v ton b du bi trn ng c 2. Kim tra kn ca h thng nhin liu, du bi trn ng c, dung dch lm mt v b sung dung dch lm mt, kim tra van hng nhit. 3. V sinh cc li lc v thay phin lc nhin liu, kim tra, lm kn v x kh. 4. iu chnh cng dy ai truyn ng 5. V sinh bu lc gi, thay du v kim tra kn ca h thng ht. 6. Xit cht cc bu lng, ai c bt gi mt quy lt 7. Kim tra bo dng bm cung cp nhin liu 8. Kim tra v v sinh thung cha nhin liu 9. Kim tra bo dng b tng p 10. Lp rp hon chnh v iu chnh m bo cc yu cu k thut 11. Khi ng ng c v theo di s lm vic ca ng c cc ch tc . H thng li hp 1. Kim tra, bo dng bm v xi lanh tr lc li hp, hp li hp, cc ng, ct li hp 2. Bo dng, iu chnh cc thanh ging li hp, bo dng cc khp cu ging li hp, kim tra, iu chnh cc khp cu ca xi lanh tr lc li hp. 3. Bo dng trc khp chuyn hng. 4. Kim tra kn ca h thng du tr lc li hp, v sinh phin lc v thay du tr lc li hp. 5. Lp rp hon chnh, iu chnh m bo cc yu cu k thut v an ton. 6. Kim tra v iu chnh sau khi lp rp: H thng phanh: 1. Kim tra tnh trng lm vic ca my nn kh v c cu tr lc phanh 2. Kim tra kn ca h thng kh nn 3. Kim tra kn ca h thng phanh du 4. Kim tra , bo dng cc c cu iu khin, dn ng phanh, iu chnh hnh trnh t do v hnh trnh lm vic ca bn p phanh, phanh tay

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5. Thay m phanh, kim tra bo dng m phanh, tang phanh, trc cam phanh, c cu iu chnh phanh. 6. iu chnh khe h gia m phanh v tang phanh 6. Lp rp hon chnh v iu chnh m bo yu cu k thut v an ton. H thng in: 1. My pht in Thay ,v sinh, kim tra cch in gia cc cun dy Bo dng, sa cha cc h hng Lp rp hon chnh, thit b chuyn dung kim tra dang in np ban u 2. My khi ng: v sinh v kim tra cc tip im b mch in chnh. m bo t l tip xc > 80% din tch cc tip im, kim tra cc phanh tip im Bo dng, sa cha cc h hng Lp rp hon chnh 3. Bnh in bo dng cc in cc Thc hin sa cha, np bnh in theo quy trnh 4. Cc thit b in khc: Kim tra v sa cha h thng cc cng tc, cu ch, ng h Kim tra sa cha ton b ng dy in 5. Lp rp cc thit b xe, iu chnh m bo yu cu k thut. H thng ly hp v hp s: Tho h hp s, kim tra bo dng, sa cha nhng h hng ca a ch ng, a trung gian Kim tra sa cha cc a b ng Kim tra bo dng cc c cu iu khin, dn ng ly hp v khc phc nhng h hng. Kim tra bo dng c cu dn ng v iu khin, cc chi tit ca hp s chnh, hp s ph, sa cha khc phc nhng h hng Lp rp, iu chnh ton b h thng, thay du hp s.SVTH: Nguyn Ngc Ht16

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H thng di chuyn v h thng treo: 1. Tho ton b lp v cc moay , kim tra cc chi tit, vng bi, u cu, bo dng v thay ton b m 2. Tho kim tra bo dng cc b nhp, gim xc, thay th cc chi tt hng 3. Tho kim tra cc ging cu v cu cn bng 4. Lp rp hon chnh, iu chnh m bo yu cu k thut. H thng truyn lc: 1. Tho kim tra lng then hoa ca trc cc ng, kim tra bo dng cc khp ch thp cc ng v sa cha nhng h hng. 2. Tho kim tra cc c cu truyn lc chnh v vi sai cc cu ch ng, khc phc nhng h hng 3. Lp rp v iu chnh m bo cc thng s k thut ca ton b h thng. Khung xe, thng xe: 1. Kim tra, bo dng v sa cha ton b cc khung, x, cc gi , gi gim chn. 2. Kim tra tnh trng bung li hp, cnh ca, kho ng m ca, cc c cu lt ca bin 3. Kim tra xit cht cc chi tit gi b vi khung xe, kim tra tnh trng thung xe, chn bun, sa cha nhng hhng. 4. Kim tra sa cha gh ngi v c cu iu chnh v tr ngi . Cc phn vic b sung Kim tra bo dng, iu chnh v khc phc nhng hhng nu cn ca: bm v c cu thu lc, h thng iu khin, c cu dn ng lai bm, xi lanh nng thng xe, khuu nng thung xe. V sinh, kim tra kn ca h thng du v b sung du thu lc. Sau khi lp rp, xit cht li ton b mi ghp ren ca xe. B: Bm m: Bm m vo tt c cc v m C: V sinh v bi trn:SVTH: Nguyn Ngc Ht17

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1. V sinh li lc du tr lc 2. V sinh bu lc gi 3. Thay mi lc nhin liu 4. Thay du v phin lc ca h thng bi trn ng c. 5. Thay cc loi du: cc hp s, cc cu ch ng, gi trung gian cc ng, xi lanh tr lc, hp li hp 6. Thay ton b m moay 7. X cn cc bnh cha kh nn 8. Kim tra, thay dung dch nc lm mt. Kim tra mc nht my: Kim tra mc nht my hoc tnh trng nht chm thm hoc thay nht mi nu cn. Kim tra mc nht bn trong ng c nhit hot ng bnh thng nh sau: Sau khi ngng ng c,ch vi pht n nh mc nht trong cacte. Sau khi ko que thm nht ra ngoi,kim tra mc nht. Lau sch que thm nht ri que vo tr li. Sau rt que thm nht ra v quan st mc nht dnh trn que. Ch : mc nht tt nht l gia du MIN v MAX

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Nu mc nht thp di mc MIN th chm thm. Ch : nu kim tra mc nht trong tnh trng ng c ngui th nht khng hi v trong cacte y ,v th mc nht chnh xc cng khng th hin c.V vy nn ch n khi ng c t n nhit lm vic th mi tin hnh kim tra mc nht. Thay nht my v lc nht: Dng c bt buc: co chuyn dung thay lc nht 0991547341 Khi kim tra mc nht hoc tnh trng nht,nu cn c th tin hnh thay lc nht nh sau: Sau khi ngng ng c,ch vi pht nht n nh trong cacte ng c. Tho np y nht (b) ng c ra ngoi. Dung kha vng (c) m c x nht ra ngoi.

Sau khi x nht hon ton,sit cht li c x nht n 30-40Nm Thay th lc nht s dng co chuyn dung 0991547341 - Tho cm lc gi,gim n ra ngoi. - Tho bulong,tho tm cch nhit ra ngoi - Ni lng vt gi ming che bm tr lc li v y ng tr lc v pha trc. - Tho lc nht.SVTH: Nguyn Ngc Ht19

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Kim tra cuaroa cam: Kim tra dy cuaroa cam c lng,chung,nt,bin dng..v thay th nu cn thit.

Dy cuaroa cam chnh l dy ni gia puli W vi puli X.SVTH: Nguyn Ngc Ht20

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Kim tra cc dy cuaroa ngoi: Kim tra cuaroa my pht (e),kim tra cuaroa tr lc li (f),cuaroa my lnh (g), cuaroa tr lc li (h) xem c b lng,chung,bin dng khng.Nu cn th thay th.

Kim tra bugi: Kim tra tnh trng ng mui than trn bugi,khe h bugi,s mn cc in cc,s h hng lp s cch in.Nu khng tt th thay mi bugi. Tho v kim tra bugi tin hnh nh sau: Ko cc u dy cao p khi bugi.Ch tay nm phi gi ngay phn u dy cp,gip trnh lm t dy.

Tho bugi ra khi ng c bng mt tup chuyn dng. o khe h bugi(k) bng mt thc cp.Nu gi tr o c khng nm trong khong cho php th iu chnh li in cc. Khi lp bugi mi vo phi kim tra khe h ca n c tt khng.

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Kim tra lc gi: Nu lc gi b bn,cng sut ng c cng b gim. Nn kim tra lc gi thng xuyn.c bit xe chy trong iu kin mi trng nhim nn thng xuyn kim tra v thay th. Kim tra lc xng: Nu lc xng b nght th cng sut ng c cng b gim.V vy nn thay lc mi sau khong thi gian bo dng lc (thng l 20000 km) Kim tra h thng nhin liu: Kim tra cc ng nhin liu v cc co ni c b h hng hay b r r khng. Kim tra bn ngoi ng c b try xc khng. Kim tra np thung nhin liu c lng khng. Kim tra h thng chn khng: Kim tra ng chn khng,ng PCV hoc ng than hot tnh c b h hng khng. Kim tra b mt cc ng chn khng,ng c b bin dng hay nt,gy khng.

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2.CC H HNG THNG THNG GM T 1- Nu xe xut hin nhng du hiu sau: - My hot ng khng n nh hoc c ting ku l - ng c gim hn cng sut, sc ln - Gm xe r r nc - H thng x kh ku bt thng - Lp xe rt mnh khi dng hoc xe - Xe lch v mt bn du ang i trn ng bng phng - Phanh nh, mt hiu qu - Nhit ca nc lm mt ng c cao hn bnh thng kim tra mc h hng bng kinh nghim: - xe vn n my, quan st mu kh x. Nu kh x c mu en hoc trng u khng tt. Kh x mu en l do hn hp kh qu m hoc du bi trn lt ln bung chy. Kh x mu trng l do xng c ln nc hoc m np my b chy. - xem mu sc ca chn nn in: Nu chn nn in c mu en hoc mu sang u khng tt. V hin tng sc du ln bung chy hoc b la u lm chn nn in c mu en: cn mu sang l do chn nn in b chy v ng c lm vic qu nng. 2- Mt s h hng thng thng v cch khc phc a. Tay li nng Nguyn nhn: - Xp hng qu nhiu v pha trc - Lp non - Thiu du tr lc tay li Cch khc phc: - iu chnh li cch xp hang - Bm lp p sut quy nh - B sung du cho tr lc tay liSVTH: Nguyn Ngc Ht23

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b. Tay li kh tr v v tr thng (cn bng) Nguyn nhn: - Thiu du bi trn cc khp ni ca h thng li - Bc li xit qu cht - Vt v tn (bnh rng vt v thanh rng) chnh khng ng - Gc t bnh xe khng ng Cch khc phc: - Tra du m vo cc khp ni - Ni lng bc li cho chun (ch nu lng qu s b d) - Chnh li vt v tn (thanh rng v vt rng) - Chnh li gc t bnh xe c. Tay li b rung Nguyn nhn: - ai c bt cht bnh xe b lng - Cc khp ni ca h thng bnh li cha cht - Mn bc tr li - Mn bc thanh rng thc li - Gin cn bng li b cong hay cao su phn cn bng b thoi ho - Bnh xe khng cn bng - Do lp b vn hay lp cha - Lp non hoc cc lp bm cng khng u - Lp mn khng u - Khi lt vo ng du ca h thng tr lc li Cch khc phc : - Xit cht cc ai c - Xit cht li cc khp ni - Thay, tin li bc mi - Chnh li bc t thc li - Thay bc trn hay cn li cho khe h hp l - Cn bng li cc bnh xeSVTH: Nguyn Ngc Ht24

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- Thay th cao su phn cn bng, kim tra lp hoc bm li lp - Bm lp p sut quy nh - Thay lp - X kh trong h thng tr lc li d. Tay li nhao (sang tri hoc sang phi) Nguyn nhn: - Ap sut lp khng u - Cao su tay li b thoi ho - Gc t v lng khng ng - chm bnh v song hnh bnh xe sai - B d to li - Rtuyn li hng do lm vic lu ngy Cch khc phc: - Bm lp ng p sut quy nh - Thay th cao su tay li - Chnh li gc t v lng, chm v song hnh bnh xe. - Thay th to li - Thay th rtuyn e. Phanh khng n Nguyn nhn: - Hnh trnh ca bn phanh khng ng - ng du hoc kh ca h thng phanh b r r - Piston bnh trc b b thng phanh a - Bu tr lc hi v pht gia tng trn b hng - Cp pen phanh b hng - Dy phanh tay b t hoc b b - M phanh qu mn Cch khc phc: - Chnh li hnh trnh bn p phanh - Xit cht li cc u khp ni, thay th cc mSVTH: Nguyn Ngc Ht25

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- X kh ln trong du phanh - Tho ra ly giy rp mn v du nh li - Thay th bu tr lc v pht gia tng trn - Thay cp ben, dy phanh, m phanh mi f. B phanh Nguyn nhn: - Hnh trnh ca bn phanh khng ng - Phanh tay iu chnh sai - L xo ko hoc l so hi v m phanh b hng - Xy lanh bnh xe b kt - Xy lanh phanh chnh b hng - Khi b nc ngp do khp ni tang trng phanh tay b st g dn n b phanh - c phanh b b do kh du hay nc vo Cch khc phc: - iu chnh li hnh trnh bn phanh - iu chnh li phanh tay - Thay l xo ko c cu phanh - Thay th xi lanh bnh xe - Thay th xi lanh bnh chnh - Tho khp ni v bo dng bng cch nh r st phn khp tang trng - nh sch v cho thm m j. Phanh b n lch mt bn Nguyn nhn: - Cp ben di xi lanh chia b hng - Ap sut hi lp khng hoc p xut hi lp cc bnh xe khng u - Xp hang lch mt bn - Lp mn khng u - Tang trng phanh b mo - M phanh b dnh duSVTH: Nguyn Ngc Ht26

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Cch khc phc: - Thay th cp ben - Bm lp ng p sut quy nh - Xp li hng trn xe - Thay lp mi nu cn thit - Sa cha li tang trng phanh - Lm sch m phanh g. Ap sut ca kh nn khng Nguyn nhn: - ng dn kh nn b h - Dy ai bm kh nn b chung Cch khc phc: - Xit cht li cc u ni ca ng ng - iu chnh li cng ca dy ai

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3.CCH THO V SA CHA MY KHI NG Mc ch ca phn ny l cho bn thnh tho quy trnh kim tra v sa cha thit b in ng thi tm hiu cc chc nng ca h thng khi ng trn xe thng qua vic thc hin nhng cng vic sau. 1. Tho Tho my . 2. Tho ri Tho ri my . 3. Kim tra Kim tra nhng chi tit lin quan n my nh phn ng, c gp v.v. 4. Lp rp Lp rp my . 5. Th Tin hnh th cm my . 6. Lp Lp my ln xe.

Tho Cc b phn 1. Tho cc m ca c quy

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2. Tho my

Tho cp m ra khi c quy 1. Tho cp m ra khi c quy

Trc khi tho cp m ra khi c quy, hy ghi li nhng thng tin lu trong ECU DTC (M chn on h hng) Tn s i chnSVTH: Nguyn Ngc Ht29

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V tr gh (vi h thng nh) V tr vlng(vi h thng nh) 1. Cc m c quy Tho my 1. Tho cp my (1) Tho np bo v ngn mch. (2) Tho ai c bt cp my . (3) Tho cp my ra khi cc 30 ca my .

GI : Do cp my c tho trc tip ra t c quy, n c mt np bo v ngn mch. 1. ai c bt 2. Cp my 3. Np bo v ngn mch 2. Tho gic ni ca my n vu hm ca gic, v cm vo thn gic tho gic ra.

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1. Gic ni 3. Tho my Tho bulng bt my v trt my tho n ra.

1. Bulng Tho ri Cc b phn 1. Tho cm cng tc t (1) Cng tc t (2) Cn dn ng

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2. Tho cm stato (1) Stato (2) Np sau (3) V my

3. Tho l xo chi than (1) a (2) L xo (3) Tm cch in gi chi than

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4. Tho cm rto

(1) Rto 5. Tho cm ly hp my

(1) Ly hp my (2) Bc chn (3) Phanh hmSVTH: Nguyn Ngc Ht33

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Tho cm cng tc t 1. Tho dy dn (1) Tho ai c bt v tho dy dn. 2. Tho cm cng tc t (1) Tho 2 ai c v kp cng tc t v pha sau. (2) Ko u ca cng tc t ln trn v nh mc ca mc ra khi cn dn ng. (3) Tho cng tc t.

1. Dy dn 2. V my 3. Cng tc t 4. Cn dn ng 5. Mc Tho cm stato 1. Tho cm stato (1) Tho 2 bulng. (2) Tho np u c gp. (3) Tch v my ra khi stato. (4) Tho cn dn ng.

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1. V sau 2. Stato 3. V my 4. Cn dn ng Tho l xo chi than 1. Tho l xo chi than (1) Gi trc ca rto ln t gia nhng tm nhm hay gi.

(2) Nh kho vu hm v tho a. Ko vu hm ln bng ngn tay tho a.

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CH : Tho dn a ra nu khng l xo chi thn c th bay ra ngoi. 1. a 2. Vu hm (3) Tho chi than trong khi p l xo bng t vt u dt v.v. CH : Hy thc hin cng vic vi t vt c qun bng dnh. Hy thc hin cng vic ny vi gi trn gi chi than do l xo chi than c th vng ra.

1. Chi than 2. L xo chi than (4) Tho l xo chi than ra khi tm cch in gi L xo chi than TSVTH: Nguyn Ngc Ht36

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(5) Tho tm cch in gi chi than Tm cch in gi chi than

Tho ly hp ca my 1. Tho ly hp ca my (1) Tho cm rto ca my ra khi stato v gi rto ln to gia nhng tm nhm mm hay gi.

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1. t 2. Gi (2) Trt bc chn xung di bng cch g vo n vi t vt u dt.

1. Phanh hm 2. Bc chn (3) Tho phanh hm. M ming ca phanh hm bng t vt u dt. Tho phanh hm.

1. Phanh hm (4) Tho bc chn v ly hp my ra khi trc rto.

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4.K THUT CH NHMTrn 50% thi gian sn xe l ch nhm. V th to cng vic tri chy giy nhm phi c nhng yu t sau - Ht ct - Sc bm dnh - Giy Phi chn loi giy c kh nng bm dnh ht ct tt v b tr ht ct n K thut ch nhm t

F.E.P.A : Federation of European Producers of Abrasives l tn vit tt ca hip hi tiu chun giy nhm chu u Biu th th bc bt u bng ch P

Kch c nhm biu th s ht ct S nhm cng cao th giy nhm cng nhuyn Thng thng t P240 n P2000 Gp ya s dng ca nh sn xut nh 3M, SIA,Mirka

Quy trnh ch nhm

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Ch nhm nc thng c s dng bng tay khi s dng phng php ny phi tun th nhng im sau

- Gi tht nhiu nc trn b mt trong khi ch - iu ny gip cun tri nhng bt sn trong khi ch v gip giy nhm khng b dnh - Ch nhm cung mt hng, trnh ch ngang, dc d b du sc nhm - Gi b mt ch cng sch cng tt - S dng thanh ch nhm trnh li du ngn tay - Nn s dng vi nc ra sch bt do nhm ch ra - Nu nc kh trn b mt th nc bn khi ch nhm s lm bn khu vc c ch v l nguyn nhn ca hin tng bong trc - Tuy nhin sau khi ch nhm xong mi panel. iu quan trng nht l phi ra v thi kh b mt

Phng php ch nhm nc thng khng c hiu qu cao do hai nguyn nhn chnh

1. Thi gian lu 2. Tiu tn vt liu s dng ng bao gi ch nhm i vi loi matic hai thnh phn, matic phun v chng rt d dng ht m Tuy nhin cng vic ch nhm nc c th loi b c mt v li khi lp sn kh

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5.K THUT SN TSn l cng on cui cung c tnh quyt nh ti hnh thc ca chic xe ang sa cha. Khc vi quy trnh sn tnh in thng c thit lp trn dy chuyn sn xut xe mi, trong dch v sa cha ngi ta thng trang b h thng sn sy quy m nh, c tnh linh hot cao. Quy trnh sn sa t c 6 cng on c thc hin. u tin l tra m mu. K thut vin s tin hnh so mu chic xe cn sa vi tp th m s mu ca loi xe chn ra th tng thch (vi nhng i xe sn nhiu tng s c c b th mu cho tng b phn xe). Chuyn vin pha sn cn xc nh din tch b mt cn sn tnh ra lng sn dung. Vic xc nh ny da theo ba-rem nh lng sn do hng sn cung cp, cho tng module nh thn, v, khung, sn cc loi xe. V d sn ton b chic sedan Mondeo V6 cn 4 kg sn, cn nu sn ring 4 cnh ca s dung ht 0,3 kg. i vi nhng mng sn nh khng chim ht mt module nh lng, k thut vin s t xc nh khi lng sn cn thit theo kinh nghim, sai s khng ng k. Chuyn gia pha sn cng cn nh gi k lng nhng phm cht thc ca mu sn xe trn tng module nh bc nhit (np khoang hnh l, np ca-p, mui xe...), bc gi (mi xe, cn trc, lng gng,...), xung mu chung theo thi gian s dng gia gim cng thc lc pha sn, to mng mu mi trung hon ton vi thn xe c. Bc tip theo cn lm l tnh cng thc v lng sn cn pha trn my tnh. K thut vin nhp tn xe, m s mu v tng khi lng sn cn pha vo bng tra trn my tnh. Phn mm chuyn dng do hng sn xut cung cp km theo dy chuyn sn lp tc tnh ra t l cc mu sn thnh phn pha ra mu sn xe. Cn c khi lng tng m k thut vin nhp vo, khi lng tng mu sn thnh phn cng c xc nh chnh xc ti 1/10 gam. Sau lnh in, k thut vinSVTH: Nguyn Ngc Ht42

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sn sy s c trong tay trang giy ch dn cng thc pha mu sn vi khi lng sn cn cho chic xe ang sa cha. Vi nhng dng xe ang c s dng rng ri trn th trng th cng thc pha sn thng c sn ngay trong t ng th m mu v chng c s dng thng xuyn, thm ch chuyn gia pha sn c th nh ht mu thnh phn v t l pha. Cc k thut vin s thc hin bc pha sn v gia gim mu theo ch dn ca my tnh. Cc thng tin v cc mu sn thnh phn chia lm 3 ct: tn miu t mu sn, m s mu v khi lng cn dung. Cn c trang in ch dn, k thut vin chn cc hp sn thnh phn theo m s ghi trn v ri a chng ln dn khuy t ng x l vng v ng kt. Tip theo, s t mt hp rng sch ln cn in t v ln lt rt vo cc mu sn thnh phn theo ng khi lng ghi trong ch dn. Cui cung, hp sn va pha c a ln my khuy tht k, chuyn gia pha sn s kim tra mu pha v gia gim thnh phn i cht cho mu pha mi trung hp vi bc ca mu xe c. Trc khi sn, cn lm kh, sch phn v xe nh sn, ng thi che chn cc chi tit xung quanh vung sn nu chng khc mu, dn bng keo che cc np m, mt knh (vi nhng chi tit kh che chn c th qut ph ln chng mt lp m long tht mng). Thng gi phng sn, lc khng kh sau t li cc ch sy, ht m, chiu sng v chiu nhit. Nhit chun thng thng khi sn l 30oC, cn khi sy l 70oC. Sau khi cc thng s v nhit, m, nh sng t yu cu, a xe vo ca-bin v tin hnh sn lt. Nu lp sn ny c thc hin ngay sau cng on b matt th nh rp li cho mn, sy kh v phun nc mu th nht. Trong qu trnh ngi th phun cc nc sn, thit b ht gi trong ca-bin c kch hot bi sn khng bay l lng lm vn c khng kh hoc bm vo cc chi tit khc. Thi gian thc hin thao tc sn ph thuc vo din tch b mt cn che ph, nhng tng thi gian t lc xe chy vo ca-bin, qua giai on sn cho n khi sy xong nhit 70oC thng mt khong 8 ting (bng mt ca lm vic). Cui cung l cng on ha mu v nh bng. Sau khi c a ra khi ca-binSVTH: Nguyn Ngc Ht43

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sn sy, xe cn c nh bng ton b ha mu gia 2 lp sn c v mi. Du k thut v kinh nghim pha sn ca chuyn gia iu luyn n c no th vt sn mi cng hi b chnh so vi b mt sn c trn ton xe, nu b qua bc nh bng ha mu ny. K thut vin s bi xi bng ln ton xe v nh k, c bit vung mi sn v khu vc tip gip. Vic nh bng bng xi c tc dng lm m v c bt mng sn mi nhng li lm bng v mi nhng mng sn c. Nu cng on ny c lm tt, s rt kh nhn ra u l ch mi c sn li.

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KT LUN

Qua thi gian thc tp, bng vic tip xc vi thc t trn cng trng cung vi s gip ca cc thy c gio trong khoa ng lc v c bit l s tn tnh ch dn ca thy gio v lm kim thanh , cng vi n lc phn u hc hi ca bn thn, em thu c rt nhiu kin thc thc t. Do cn thiu nhiu v kinh nghim cng nh v thi gian nn bo co ny khng th trnh khi c nhng sai st. V vy, em rt mong nhn c s gip , ch bo ca cc thy c gio em c th hon thin tt hn. Theo em, tr thnh mt ngi k s tt, ngoi vic nm vng v chuyn mn cn bit quan tm n i sng ca ngi cng nhn, ng vin h hng hi trong cng vic. Qua y em xin chn thnh cm n Ban gim hiu, cc thy c trong khoa ng lc trng i hc cng nghip TP H Ch Minh Thy V Lm Kim Thanh tn tnh gip , ch bo cho em. Bn cnh , em xin gi li cm n chn thnh n ban gim c cng ty c phn TM-DV ph mn gip v to mi iu kin thun li gip em hon thnh tt qu trnh thc tp ca mnh. TP.HCM ,thng 03 nm 2010 SVTH Nguyn Ngc Ht

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