??? ???????????? (MIG :metal inert-gas arc welding )

1
??? ???????????? (MIG metal inert-gas
arc welding )
2
??? MIG???????
??????

• ??MIG??????
• ??MIG?(metal inert-gas welding)
• ???????????????????????????????

?MAG ??O2 (25) Ar
??GB/T5185-1985??????????????????,MIG????
???131?
3
??MIG???? ?? ?????????????,????????? ???????
?TIG 1.6mm??I150A,?MIG,I350A ????????????,???
???Al?Mg????? ?????
?? ????????????????? ??????,??????? ??????????
?????? ??6000L,??812L/min,80?
4
??MIG???? ?????????????(????????,????
??????)???????????? ?????(1mm)?? (????????,
?????) ?????? ??????????? ??,????????, ?????????
?
5
(No Transcript)
6
???? (??????,?????)
????
7
??Tigra?????????
8
??? MIG???

• ???????
• ??????????????????????(???)??????(????)??
• ??????CO2????,????????MIG????,
  ??MIG/MAG/CO2???,?????????????

9
1?????
???????????SAW???CO2?????, ?????????????????, ??
?????????????????? ????????? ??,??????
10
2?????
?CO2????????,?????????????
???MIG??????????,?????????,????????????
?????(CO2?????????????????)?
3?????CO2??????????????? 600A200A
11
4????? ????????????
5???????? 1???????????????????
MIG????Ar???????,???????Ar?????
2??????????(150A)/????
Fronius??????
12
??? MIG???
????????
???????????????????????
?????
MIG?????????,?????????????????? 1
??????,??????????(lt200A),?(?????)????????,????????
??? 2 ??????,??????,???????,?????????????,????
???? 3 ?????????????,??????/??/?????????,?????
??????(??????)?
13
4 ????????????????????????????????
???????? ???? I ??????????I?,
???? U,??????????,????lt8mm.
???,???????,?????????????????,?????????????????
?, ??????????????? ???????????,???? ????????????
???
14
?????? 1. Ar??GB/T4842-1995???? ???????
(1) ??????1.4? ,????15.76V (2)
?????,?????,???????????
(3)??????????,??????,??????????? 2. He
???GB4844.2-1995????? ???????
(1)??????0.1?,????,
????????????2-3? (2)?????,?????
,????24.5V ?????????
???????????????,????????????,??????????,??????????
???????????????40l ????,450???
15
3. Ar He
??????????(??)??? d1020mm He(50) d20mm,He(75
90) ??,N2???(??)??????,??? Ar
N2(20)???(??)? 4.???? ???????(??)???,??????????
??,?????????????????,????(??)???????MIG?MAG???,
????Fronius????????????MIG?????????????????(0.5O2
?8CO2?26.5He?65Ar) ?
16
???? ???? ????
ArO2 12 O2 ????????
ArO2 O2max20 ???????
ArCO2 ???????(CO225??CO2???? ) ???????
ArCO2O2 2 O2?5CO2 ????????(?????CO2????/???????????CO2)
ArCO2O2 80155 ???????
17
?????????
MIG???????????????????????(????)????????
1????? ????????????????????????????????????G
B/T3190-1996 ???????????????/????,???????????
????????????? ????MIG??????,????????,????????
??????????,????????????????
????????????MIG??,??????? ?Fronius????????????1.2m
m????MIG???0.8mm????
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2????? ??????????????????????????????????????
????? ???????,????????????????????????
3????? ???????????,??????????????
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4????? ?????????????,????????????
???????????????,??????560m/h??,?????25150m/h???
5????? ?? s c ? h ?? s c h ?? s c ?h
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5??????????????? MIG?????????TIG????,???3060L/min
,?????????????,??????????????????
???????????????????????????????? ?????????1222mm
21
??
MIG???????????????F,??????I,????I?????U?V??????
??,?????MIG? 1. ???????90,Al?Cu?????,???????
2. ????MIG????????,?????????????????????????????
?????? 3?????????????,???????,??????????????,?????
???????,???????
22
??? MIG??????

• ????MIG?
• ??MIG??????????????????MIG????
• ?????????(??)???????

i
t
???????????(?????,???????)??????,?????????
(??)????????????,?????????,????????????(????)????
????
23
????????,??MIG?????????,????????(????)???? 1
??????????? ?????????????????I0,??????????I0
,??????????? 2????????????? ?????????????,???????
??10-2 S?????? 3????????????????
?????????????,??????????????????????????,?????????
,????(???????)???
???????
24
2???????? ??MIG????????MIG??????,
????,???????????(??)
? ???? ip ????????(?????)???????? ?????i0
????????????,??????????????????? ???????tp
??????????????(??)? ?????????t0
????????????????,????????(????)?
????T tp tp???1/T????(???) tp / T??? ip /
i0??
25
????????????????????,????????????(????),????
???ip ,???????i0 ,?????????tp?t0???(????????????)?
??,????????????????,??????????????????????????????
?????????????,??????????????????????????
??,??GMAW(??????????)????(???????)????????,????
?????????????????,???????,???????????????,??,?????
???????????????????????????????????
26
??????(NGW-narrow gap welding)
????(??)?????????????????????,???????????????????N
G-TIG ?NG-MIG/MAG ???? ??????? 1?????????(???
??,????????) 2??????(HAZ?,??????) 3?????? 4?????/?
??????
NG-MIG/MAG??? ??????????????????????? ??????????
?????,??,?????????????????????
27
???????????? ????????????? b69.5mm,???(0.
8 1.6mm)?????????,?????????????,??????????????,?
?????????????????? ???????,???????,????????? ????
??????????? ?????????????
b1015mm,??(24.8mm)?????(????????????),??????,??
?????,?????????? ????????,???????,?????????,?
???????152mm?
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• a)??????
• b)??????
• 1-?? 2-??? 3-?? 4-??
• 5-?? 6-?? 7-????

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???????(??)?????(MAGmetal
active-gas arcwelding )

• MIG?????????????,?????????,?????????????,??
  ?,????????????????????MAG????MIG????????,?????????
  ??????
• ??GB/T5185-1985?????????????????????,????
  ??????????????????,??,MAG(?????????)??CO2????????1
  35?

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?? MAG??? ??

• ?????????????,????????,?
• ?????,??????
• ???????

??

• ????????????????
• ?????????

? ??,??????????????????,?MAG? ?????????
MAG????????????,??? ???????????MIG????,?????
31
??MAG??????????????(P90?3-9)
???? ???? ????
ArO2 12 O2 ????????
ArO2 O2max20 ???????
ArCO2 ???????(CO225??CO2???? ) ???????
ArCO2O2 2 O2?5CO2 ????????(?????CO2????/???????????CO2)
ArCO2O2 80155 ???????
???????????,????????????????
????????????????????,??????
32
??MAG??? (?)????????? ? ??????????MAG?????????
??
????????????
?????? ?? ?? ????
???? ??????????? ?????????? ??/???/??
???? ???????????Ar???? ???????/??????? ?????????/?????
?????? ???????????????Ar????(??????) ?????(?????) ??/???/????/???????
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Ar-CO2???????????????(?????,2.5MJ/m) ???A
? ??B ???C
Ar-CO2???????????????? (??F1.2mm,??C 0.07?Mn
1.13?Si 0.65?Cr 1.42?Mo 0.60)
34
Ar-CO2???????????????
????????????????? 1F1.6mm,23V,220A
2F1.2mm,22V,140A 3F1.6mm,23V,190A
4F1.2mm,26V,160A
35
MAG???????? ?(?)????,????????????,?????????
????? ????? ????? ????? ?????? ???
? ????? ? ?????
? ?(?)????,????????????????????????
????, MAG?????????????,??????,??(???)????,??
???????????????????,???????????,?????????????,?MAG
??????,??????????
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????, MAG??????????,???????????????,???????
????????????,???????????????,????????????????,????
??????????,????????????????
??,??????,??????MAG????????????????,???????
, MAG?????????????????
37
?????????????
Ar-O2???????????
Ar-CO2???????????
38
Ar?CO2?O2???????????????????
140Ar 25 CO2 2CO2 340Ar 60
CO2 484Ar 13 CO2 3 O2 5Ar
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(?)??????? ??????????,??????????????
1????? ?? ??GB/T985-1988??????????????????
???????????? ??????
???? 2????? ???MIG???,?????????????
??????????????????? ?????????F?I???????U?????
?????????,??????????????? ??????????????????????

40
??
41
??
?? ??? 650? ? ?1500
? ??? ????????W/(m.K)238 kcal/mh???????321W
/(m.K)20 kcal/mh?