CN101972882A - Carbon-dioxide arc welding process of automotive iron casting - Google Patents
Carbon-dioxide arc welding process of automotive iron casting Download PDFInfo
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- CN101972882A CN101972882A CN201010535093XA CN201010535093A CN101972882A CN 101972882 A CN101972882 A CN 101972882A CN 201010535093X A CN201010535093X A CN 201010535093XA CN 201010535093 A CN201010535093 A CN 201010535093A CN 101972882 A CN101972882 A CN 101972882A
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Abstract
The invention provides a carbon-dioxide arc welding process of an automotive iron casting. The process comprises the following steps of: cleaning a crack area; drilling a small hole on the head and the tail of a crack so as to ensure that the crack is not cracked any more; grinding a V-shaped groove at the crack to ensure the welding quality; after selecting a proper welding wire, introducing carbon dioxide (CO2) for welding; and stabilizing the performance and quality of the iron casting by certain heat treatment. The invention discloses the carbon-dioxide arc welding process of the automotive iron casting. The process has the advantages of simple process, low cost, high welding efficiency, capacity of better ensuring the quality and service life of a welded joint, and high machining property.
Description
Technical field
The present invention relates to a kind of welding procedure of automobile ironcasting, especially a kind of under carbon-dioxide protecting, can guarantee preferably the ironcasting weldquality welding procedure, belong to the auto repair field.
Background technology
Because cast iron has advantages such as strong hardness height, stable physical property, occupies very big proportion in the automobile making material.Cast iron part is machining accuracy height, expensive fundamental parts mostly, such as the chassis, cylinder block, cylinder head, case of transmission etc.But ironcasting situations such as crackle, pore, damage occur through regular meeting in manufacturing and use.According to statistics, automobile is under normal operating position, and when this class part reached the limit of wear, its change in size had only 0.08%～0.40%, and mass loss has only 0.1%～1.8%, and scrap part this moment, wastes very much beyond doubt.Therefore, research and the advanced repairing experience of utilization, reasonably repairing cast iron part is very necessarily.Welding is exactly a kind of method of repairing ironcasting very effectively.Cast iron carbon content height, impurity are many, and have that plasticity is low, weldability is poor, to characteristics such as cooling velocity sensitivities, occur white structure after the soldering easily and crack.Adopt conventional welding method often not reach requirement, people wish to have a kind of operation simple, and cost is not high, but can eliminate crackle hidden danger really, recover the welding procedure of part normal working performance.
Summary of the invention
At the demand; the invention provides a kind of carbon-dioxide arc welding technology of automobile ironcasting,, ironcasting is welded under CO 2 gas-shielded by rational operation design and welding procedure; can satisfy serviceability after making the foundry goods reparation, reach safe performance indexes.
The present invention is a kind of carbon-dioxide arc welding technology of automobile ironcasting, and this processing step is as follows: at first, and the cleaning slit region; Secondly, respectively bore an aperture at the head and the tail of crackle, purpose is to guarantee that crackle no longer splits length; Then, grind the V-type groove, guarantee welding quality in cracks; Then, select to lead to CO behind the suitable welding wire
2Gas welds; At last, stablize the performance and the quality of ironcasting by certain heat treatment.
In a preferred embodiment of the present invention, described aperture can effectively prevent crack growth apart from crackle 4-8mm place.
In a preferred embodiment of the present invention, described aperture can be circular hole or square opening.
In a preferred embodiment of the present invention, described small aperture is 3-6mm.
In a preferred embodiment of the present invention, it is 1.6-3.2mm that described welding wire is selected diameter.
In a preferred embodiment of the present invention, described CO
2The pressure of gas is 0.2-0.4Mpa, and flow is 10-12L/min.
In a preferred embodiment of the present invention, described heat treatment is that the ironcasting that welding is good is heated to about 500-560 ℃, and the insulation certain hour then with the stove cooling, to eliminate internal stress, improves serviceability.
The present invention has disclosed a kind of carbon-dioxide arc welding technology of automobile ironcasting, and this technique process is simple, cost is low, welding efficiency is high, can guarantee the quality and the service life of weld seam preferably, and machining property is preferably arranged.
The specific embodiment
In order to make those skilled in the art person understand technical scheme of the present invention better, and above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with embodiment.
Example 1
During the welding of automotive cylinder block, this processing step is as follows:
At first, the cleaning slit region is cleared up crackle with flat chisel, cleans near the greasy dirt of crackle, produces pore when avoiding welding;
Secondly, respectively bore an aperture at the head and the tail of crackle, purpose is to guarantee that crackle no longer splits length, and described small aperture is 6mm, and apart from crackle 5mm place, the while aperture is a square opening;
Then, use emery wheel to grind the V-type groove, guarantee welding quality in cracks;
Then, select to lead to CO behind the suitable welding wire
2Gas welds, and wherein welding wire selection diameter is the carbon constructional quality steel of 3.2mm, the CO of feeding
2The pressure of gas is 0.4Mpa, and flow is 12L/min, and wherein arc welding is pressed and is 22V, and welding current is 80A;
At last, the ironcasting that welding is good is heated to 550 ℃, and the insulation certain hour then with the stove cooling, to eliminate internal stress, improves serviceability.
Example 2
During the welding of automotive gear box casing, this processing step is as follows:
At first, the cleaning slit region is cleared up crackle with flat chisel, cleans near the greasy dirt of crackle, produces pore when avoiding welding;
Secondly, respectively bore an aperture at the head and the tail of crackle, purpose is to guarantee that crackle no longer splits length, and described small aperture is 4mm, and apart from crackle 6mm place, the while aperture is a square opening;
Then, use emery wheel to grind the V-type groove, guarantee welding quality in cracks;
Then, select to lead to CO behind the suitable welding wire
2Gas welds, and wherein welding wire selection diameter is the carbon constructional quality steel of 2.4mm, the CO of feeding
2The pressure of gas is 0.2Mpa, and flow is 10L/min, and wherein arc welding is pressed and is 18V, and welding current is 60A;
At last, the ironcasting that welding is good is heated to 500 ℃, and the insulation certain hour then with the stove cooling, to eliminate internal stress, improves serviceability.
The main feature of a kind of motor cylinder block Oil passage of the present invention crack Repairing Technology is: operation is simple, cost is low, welding efficiency is high, can guarantee the quality and the service life of weld seam preferably, and machining property is preferably arranged.
Protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses, and the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claim was defined.
Claims (7)
1. the carbon-dioxide arc welding technology of an automobile ironcasting, this processing step is as follows: at first, the cleaning slit region; Secondly, respectively bore an aperture at the head and the tail of crackle, purpose is to guarantee that crackle no longer splits length; Then, grind the V-type groove, guarantee welding quality in cracks; Then, select to lead to CO behind the suitable welding wire
2Gas welds; At last, stablize the performance and the quality of ironcasting by certain heat treatment.
2. carbon-dioxide arc welding technology according to claim 1 is characterized in that, described aperture can effectively prevent crack growth apart from crackle 4-8mm place.
3. carbon-dioxide arc welding technology according to claim 2 is characterized in that, described aperture can be circular hole or square opening.
4. carbon-dioxide arc welding technology according to claim 2 is characterized in that, described small aperture is 3-6mm.
5. carbon-dioxide arc welding technology according to claim 1 is characterized in that, it is 1.6-3.2mm that described welding wire is selected diameter.
6. carbon-dioxide arc welding technology according to claim 1 is characterized in that, described CO
2The pressure of gas is 0.2-0.4Mpa, and flow is 10-12L/min.
7. carbon-dioxide arc welding technology according to claim 1 is characterized in that, described heat treatment is that the ironcasting that welding is good is heated to about 500-560 ℃, and the insulation certain hour then with the stove cooling, to eliminate internal stress, improves serviceability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010535093XA CN101972882A (en) | 2010-11-08 | 2010-11-08 | Carbon-dioxide arc welding process of automotive iron casting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010535093XA CN101972882A (en) | 2010-11-08 | 2010-11-08 | Carbon-dioxide arc welding process of automotive iron casting |
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| CN101972882A true CN101972882A (en) | 2011-02-16 |
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| CN201010535093XA Pending CN101972882A (en) | 2010-11-08 | 2010-11-08 | Carbon-dioxide arc welding process of automotive iron casting |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102632321A (en) * | 2012-04-23 | 2012-08-15 | 湖南华菱湘潭钢铁有限公司 | Process for welding and repairing cracks of roller end connector of rolling mill |
| CN103921057A (en) * | 2013-09-18 | 2014-07-16 | 马鞍山马钢设备安装工程有限公司 | Welding method of low-carbon quenched and tempered steel |
| CN104191154A (en) * | 2014-07-25 | 2014-12-10 | 南京梅山冶金发展有限公司 | Repairing method for breakage of boosting compensating crank arm of Boomer-series tunneling trolley |
| CN104249211A (en) * | 2013-06-26 | 2014-12-31 | 北汽福田汽车股份有限公司 | Carbon-dioxide gas shielded welding method for automotive outer parts |
| CN105855788A (en) * | 2016-06-03 | 2016-08-17 | 金川集团股份有限公司 | Welding process for repairing crack of ball milling iron casting |
| CN106493450A (en) * | 2016-11-17 | 2017-03-15 | 中国华冶科工集团有限公司 | Cleft welding method |
| CN111187883A (en) * | 2020-02-28 | 2020-05-22 | 广西玉柴机器股份有限公司 | Method for solving problem of high local hardness of cast iron casting after weld repair |
-
2010
- 2010-11-08 CN CN201010535093XA patent/CN101972882A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102632321A (en) * | 2012-04-23 | 2012-08-15 | 湖南华菱湘潭钢铁有限公司 | Process for welding and repairing cracks of roller end connector of rolling mill |
| CN104249211A (en) * | 2013-06-26 | 2014-12-31 | 北汽福田汽车股份有限公司 | Carbon-dioxide gas shielded welding method for automotive outer parts |
| CN104249211B (en) * | 2013-06-26 | 2016-06-08 | 北汽福田汽车股份有限公司 | The carbon-dioxide arc welding method of automobile appearance part |
| CN103921057A (en) * | 2013-09-18 | 2014-07-16 | 马鞍山马钢设备安装工程有限公司 | Welding method of low-carbon quenched and tempered steel |
| CN104191154A (en) * | 2014-07-25 | 2014-12-10 | 南京梅山冶金发展有限公司 | Repairing method for breakage of boosting compensating crank arm of Boomer-series tunneling trolley |
| CN105855788A (en) * | 2016-06-03 | 2016-08-17 | 金川集团股份有限公司 | Welding process for repairing crack of ball milling iron casting |
| CN106493450A (en) * | 2016-11-17 | 2017-03-15 | 中国华冶科工集团有限公司 | Cleft welding method |
| CN106493450B (en) * | 2016-11-17 | 2019-08-02 | 中国华冶科工集团有限公司 | Cleft welding method |
| CN111187883A (en) * | 2020-02-28 | 2020-05-22 | 广西玉柴机器股份有限公司 | Method for solving problem of high local hardness of cast iron casting after weld repair |
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Application publication date: 20110216 |