CN103357988A - Shaft precision machined part damage defect welding repair method - Google Patents
Shaft precision machined part damage defect welding repair method Download PDFInfo
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- CN103357988A CN103357988A CN2012100915069A CN201210091506A CN103357988A CN 103357988 A CN103357988 A CN 103357988A CN 2012100915069 A CN2012100915069 A CN 2012100915069A CN 201210091506 A CN201210091506 A CN 201210091506A CN 103357988 A CN103357988 A CN 103357988A
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Abstract
The invention discloses a shaft precision machined part damage defect welding repair method, relates to a welding repair method for damage defects such as abrasion of shaft precision machined parts, machining errors, material defects and shaft diameter damage caused by unclean lubricating oil, and solves the welding repair problem of shaft diameter damage defects of alloy steel shaft precision machined parts with high carbon content and alloy element content and particularly high-speed rotating precision machined parts. By the aid of the welding repair method, the overall quality of the shaft precision machined parts is ensured, machining precision, surface roughness, strength and the like meet machining requirements of the shaft precision machined parts, scrap of each whole shaft precision machined part is avoided, and the national economic loss is reduced.
Description
Technical field: the present invention relates to a kind of axle class Precision Machining part damage defect welding repair method.
Background technology: for a long time use of axle class Precision Machining part can produce wearing and tearing, because lubricating oil does not totally cause the little defective that has local error, material self in diameter of axle damage, the process etc., the existence of these damage defects can have a strong impact on the use of axle, just will announce that whole axle scrap if can not repair, this can cause the waste of material, man-hour, resource.And the coating material that the surface treatment methods such as the spraying of once testing, Brush Plating form and the bond strength of mother metal do not reach requirement, after the operation of axle class Precision Machining part the serious problem that comes off can occur.
Summary of the invention: the purpose of this invention is to provide a kind of reliable in quality that makes whole axle class Precision Machining part, and have the axle class Precision Machining part damage defect welding repair method that equipment cost is low, technique simple, can construct on a large scale.Technical scheme of the present invention is:
One, has damage axle class Precision Machining part and fix, and perform necessary protection;
Two, diameter of axle damage location is adopted hand operated grinding wheel polishing cleaning, cleaning adopts liquid penetrant inspection to detect a flaw to cleaning out the surface behind the range estimation not damaged, observe change color and judge whether to exist defective, namely the diameter of axle injured surface after cleaning out produces red display and shows and have defective, if there is defective, clear up until adopt the definite defective of liquid penetrant inspection flaw detection to clean out with hand operated grinding wheel continuation polishing;
Three, select automatic welding (establishment welding procedure) or manual welding according to the shape and size size of damage after the step 2 cleaning, the welding wire specification of automatic welding is Φ 0.8mm, the welding wire specification of manual welding is Φ 1.2mm and Φ 1.6mm, the welding wire of two kinds of welding method employings is the low-alloy steel gas protecting welding wire, and protective gas is that purity is 99.99% argon gas;
Four, according to the Depth determination pre-welding treatment temperature of damage after the step 2 cleaning, the degree of depth is during less than 1.5mm, and 50～80 ℃ of weld preheating temperature, the degree of depth be during greater than 1.5mm, 80～100 ℃ of weld preheating temperature;
Five, the injury region through the step 4 preheating is implemented welding, control electric current 80～150A in the welding process, voltage 21-28V, speed of welding 50～90mm/min, shield gas flow rate are 15L/min, weld width is 6～10mm, bead thickness≤0.6mm; Carry out lower one deck welding before not filling up damage, each layer need carry out sufficient hammering again, and to reduce the residual stress of weld seam, in the welding process, will stagger in the starting the arc of upper and lower layer weld seam, receipts arc place as far as possible, and interlayer temperature is controlled at 50～170 ℃; If damage is the annular lesions along the whole diameter of axle, divide 8-12 section symmetrical welding along circumference; The reinforcement of the weld seam of whole wound repair is controlled in the 0.5mm;
Six, after welding job was finished, commissure and near surface coverage insulation material made workpiece slowly be down to room temperature;
Seven, make device for on-site processing according to the size of the axle class Precision Machining part that fixes in the step 1, it mainly is comprised of the guide rail of the base of emery wheel, the motor that drives the emery wheel rotation, fixed electrical machinery, the support arm of regulating emery wheel and weld reinforcement distance, control motor and emery wheel position;
Eight, the damage location after adopting processing unit (plant) in the step 7 to repair welding is placed after 48 hours and is carried out surface finish;
Nine, after step 8 is processed, carry out the liquid penetration test flaw detection, detect a flaw qualified after, carry out fine finishining to damaging the repair welding position, machining accuracy is controlled at ± 0.03mm;
Ten, polished surface is carried out liquid penetration test flaw detection again, detect a flaw and carry out the requirement that surface finish to surface roughness reaches the diameter of axle after qualified.
The technique effect that the present invention produces: if axle class Precision Machining part because of use the wearing and tearing that cause for a long time, because lubricating oil does not cause totally that the diameter of axle damages, the local error in the process, the little defective of material self can not repaired, so whole axle class Precision Machining part will be scrapped.When the enforcement of welding repair method of the present invention has guaranteed the total quality of axle class Precision Machining part, machining accuracy, surface roughness and intensity etc. have all reached the processing request of axle class Precision Machining part, the waste problem of having avoided scrapping of whole axle class Precision Machining part and having caused reduces the national economy loss.The welding repair method that the present invention adopts is metallurgical binding between the material that welding forms and the timber, can both meet the demands aspect intensity and the adhesion, makes the Surface Machining precision can reach the processing request of axle class Precision Machining part through follow-up grinding and buffing.Than other surperficial repair process technology, welding repair method of the present invention is implemented formed processing layer material and mother metal is metallurgical binding, make the reliable in quality of whole axle class Precision Machining part, and have the superiority that equipment cost is low, technique simple, can construct on a large scale.
Description of drawings:
Fig. 1 is not because lubricating oil totally causes diameter of axle damage;
Fig. 2 damages the coarse weld seam after the repair by welding;
Fig. 3 processing unit (plant) schematic diagram;
Fig. 4 adopts the diameter of axle design sketch after the REPAIR WELDING of the present invention.
The specific embodiment:
One, as shown in Figure 1, have damage axle class Precision Machining part and fix, and perform necessary protection;
Two, diameter of axle damage location is adopted hand operated grinding wheel polishing cleaning, cleaning adopts liquid penetrant inspection to detect a flaw to cleaning out the surface behind the range estimation not damaged, observe change color and judge whether to exist defective, namely the diameter of axle injured surface after cleaning out produces red display and shows and have defective, if there is defective, clear up until adopt the definite defective of liquid penetrant inspection flaw detection to clean out with hand operated grinding wheel continuation polishing;
Three, select automatic welding (establishment welding procedure) or manual welding according to the shape and size size of damage after the step 2 cleaning, the welding wire specification of automatic welding is Φ 0.8mm, the welding wire specification of manual welding is Φ 1.2mm and Φ 1.6mm, the welding wire of two kinds of welding method employings is the low-alloy steel gas protecting welding wire, and protective gas is that purity is 99.99% argon gas;
Four, according to the Depth determination pre-welding treatment temperature that lacks damage after the step 2 cleaning, the degree of depth is during less than 1.5mm, and 50～80 ℃ of weld preheating temperature, the degree of depth be during greater than 1.5mm, 80～100 ℃ of weld preheating temperature;
Five, the injury region through the step 4 preheating is implemented welding, control electric current 80～150A in the welding process, voltage 21-28V, speed of welding 50～90mm/min, shield gas flow rate are 15L/min, weld width is 6～10mm, bead thickness≤0.6mm; Carry out lower one deck welding before not filling up damage, each layer need carry out sufficient hammering again, and to reduce the residual stress of weld seam, in the welding process, will stagger in the starting the arc of upper and lower layer weld seam, receipts arc place as far as possible, and interlayer temperature is controlled at 50～170 ℃; If damage is the annular lesions along the whole diameter of axle, divide 8-12 section symmetrical welding along circumference; The reinforcement of the weld seam of whole wound repair is controlled in the 0.5mm;
Six, after welding job was finished, commissure and near surface coverage insulation material made workpiece slowly be down to room temperature as shown in Figure 2;
Seven, make device for on-site processing according to the size of the axle class Precision Machining part that fixes in the step 1, it mainly is comprised of the guide rail 5 of the base 3 of emery wheel 1, the motor 2 that drives the emery wheel rotation, fixed electrical machinery, the support arm 4 of regulating emery wheel and weld reinforcement distance, control motor and emery wheel position, and its schematic diagram as shown in Figure 3;
Eight, after 48 hours, adopt the processing unit (plant) in the step 7 to be polished in the damage location surface of step 8 repair welding;
Nine, after step 8 is processed, carry out the liquid penetration test flaw detection, detect a flaw qualified after, carry out fine finishining to damaging the repair welding position, machining accuracy is controlled at ± 0.03mm;
Ten, as shown in Figure 4, polished surface is carried out liquid penetration test flaw detection again, detect a flaw and carry out the requirement that surface finish to surface roughness reaches the diameter of axle after qualified.
Claims (1)
1. axle class Precision Machining part damage defect welding repair method is characterized in that carrying out according to the following steps:
One, has damage axle class Precision Machining part and fix, and perform necessary protection;
Two, diameter of axle damage location is adopted hand operated grinding wheel polishing cleaning, cleaning adopts liquid penetrant inspection to detect a flaw to cleaning out the surface behind the range estimation not damaged, observe change color and judge whether to exist defective, namely the diameter of axle injured surface after cleaning out produces red display and shows and have defective, if there is defective, clear up until adopt the definite defective of liquid penetrant inspection flaw detection to clean out with hand operated grinding wheel continuation polishing;
Three, select automatic welding (establishment welding procedure) or manual welding according to the shape and size size of damage after the step 2 cleaning, the welding wire specification of automatic welding is Φ 0.8mm, the welding wire specification of manual welding is Φ 1.2mm and Φ 1.6mm, the welding wire of two kinds of welding method employings is the low-alloy steel gas protecting welding wire, and protective gas is that purity is 99.99% argon gas;
Four, according to the Depth determination pre-welding treatment temperature of damage after the step 2 cleaning, the degree of depth is during less than 1.5mm, and 50～80 ℃ of weld preheating temperature, the degree of depth be during greater than 1.5mm, 80～100 ℃ of weld preheating temperature;
Five, the injury region through the step 4 preheating is implemented welding, control electric current 80～150A in the welding process, voltage 21-28V, speed of welding 50～90mm/min, shield gas flow rate are 15L/min, weld width is 6～10mm, bead thickness≤0.6mm; Carry out lower one deck welding before not filling up damage, each layer need carry out sufficient hammering again, and to reduce the residual stress of weld seam, in the welding process, will stagger in the starting the arc of upper and lower layer weld seam, receipts arc place as far as possible, and interlayer temperature is controlled at 50～170 ℃; If damage is the annular lesions along the whole diameter of axle, divide 8-12 section symmetrical welding along circumference; The reinforcement of the weld seam of whole wound repair is controlled in the 0.5mm;
Six, after welding job was finished, commissure and near surface coverage insulation material made workpiece slowly be down to room temperature;
Seven, make device for on-site processing according to the size of the axle class Precision Machining part that fixes in the step 1, it mainly is comprised of the guide rail of the base of emery wheel, the motor that drives the emery wheel rotation, fixed electrical machinery, the support arm of regulating emery wheel and weld reinforcement distance, control motor and emery wheel position;
Eight, the damage location after adopting processing unit (plant) in the step 7 to repair welding is placed after 48 hours and is carried out surface finish;
Nine, after step 8 is processed, carry out the liquid penetration test flaw detection, detect a flaw qualified after, carry out fine finishining to damaging the repair welding position, machining accuracy is controlled at ± 0.03mm;
Ten, polished surface is carried out liquid penetration test flaw detection again, detect a flaw and carry out the requirement that surface finish to surface roughness reaches the diameter of axle after qualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210091506.9A CN103357988B (en) | 2012-03-31 | 2012-03-31 | Axle class Precision Machining part damage defect welding repair method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210091506.9A CN103357988B (en) | 2012-03-31 | 2012-03-31 | Axle class Precision Machining part damage defect welding repair method |
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| CN103357988A true CN103357988A (en) | 2013-10-23 |
| CN103357988B CN103357988B (en) | 2015-11-04 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103862141A (en) * | 2014-03-11 | 2014-06-18 | 中国化学工程第六建设有限公司 | Chemical composite steel pipe welding process |
| CN108620808A (en) * | 2018-05-09 | 2018-10-09 | 河南鑫轴传动机械有限公司 | A kind of transmission shaft injury repair technique |
| CN109894721A (en) * | 2017-12-07 | 2019-06-18 | 江门市新会区同达化工机械制造有限公司 | A kind of pressure vessel process method for welding and repairing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1705338A1 (en) * | 2005-03-11 | 2006-09-27 | United Technologies Corporation | Method for repairing parts composed of superalloys |
| CN101204768A (en) * | 2006-12-22 | 2008-06-25 | 沈阳大陆激光技术有限公司 | Repair process of centrifugal compressor runner blade |
| US20090026182A1 (en) * | 2007-07-27 | 2009-01-29 | Honeywell International, Inc. | In-situ brazing methods for repairing gas turbine engine components |
| CN101837501A (en) * | 2010-05-20 | 2010-09-22 | 哈尔滨汽轮机厂有限责任公司 | Surfacing method of 12-percent Cr steel high and middle pressure rotor journal of ultra supercritical steam turbine |
| CN102053025A (en) * | 2009-10-29 | 2011-05-11 | 周伟南 | Full-automatic flaw detection device for butt joint of straight pipes |
-
2012
- 2012-03-31 CN CN201210091506.9A patent/CN103357988B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1705338A1 (en) * | 2005-03-11 | 2006-09-27 | United Technologies Corporation | Method for repairing parts composed of superalloys |
| CN101204768A (en) * | 2006-12-22 | 2008-06-25 | 沈阳大陆激光技术有限公司 | Repair process of centrifugal compressor runner blade |
| US20090026182A1 (en) * | 2007-07-27 | 2009-01-29 | Honeywell International, Inc. | In-situ brazing methods for repairing gas turbine engine components |
| CN102053025A (en) * | 2009-10-29 | 2011-05-11 | 周伟南 | Full-automatic flaw detection device for butt joint of straight pipes |
| CN101837501A (en) * | 2010-05-20 | 2010-09-22 | 哈尔滨汽轮机厂有限责任公司 | Surfacing method of 12-percent Cr steel high and middle pressure rotor journal of ultra supercritical steam turbine |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103862141A (en) * | 2014-03-11 | 2014-06-18 | 中国化学工程第六建设有限公司 | Chemical composite steel pipe welding process |
| CN103862141B (en) * | 2014-03-11 | 2016-06-22 | 中国化学工程第六建设有限公司 | A kind of chemical industry composite steel tube welding procedure |
| CN109894721A (en) * | 2017-12-07 | 2019-06-18 | 江门市新会区同达化工机械制造有限公司 | A kind of pressure vessel process method for welding and repairing |
| CN108620808A (en) * | 2018-05-09 | 2018-10-09 | 河南鑫轴传动机械有限公司 | A kind of transmission shaft injury repair technique |
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| CN103357988B (en) | 2015-11-04 |
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