CN101879666B - Method for welding gusset and optical axis of rotating shaft of motor - Google Patents
Method for welding gusset and optical axis of rotating shaft of motor Download PDFInfo
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- CN101879666B CN101879666B CN2010102265583A CN201010226558A CN101879666B CN 101879666 B CN101879666 B CN 101879666B CN 2010102265583 A CN2010102265583 A CN 2010102265583A CN 201010226558 A CN201010226558 A CN 201010226558A CN 101879666 B CN101879666 B CN 101879666B
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Abstract
The invention relates to a method for welding a gusset and an optical axis of a rotating shaft of a motor, which comprises the following steps: (1) preheating the optical axis to 250 to 300DEG C, hoisting the same to a welding jig, and fixing; (2) evenly dividing the optical axis into equal parts, wherein N is more than or equal to 3 and is the same with the number of gussets, and spot welding the gussets onto the optical axis; (3) welding the optical axis with 80% Ar +20% CO2 mixed gas protection welding, and forming a first layer of welding seam; (4) thoroughly polishing the welding seam of spot welding and the first layer of welding seam, and passing the color flaw detection; (5) welding a second layer of welding seem with submerged arc welding; (6) on the optical axis, firmly spot welding a partition board with the 80% Ar +20% CO2 mixed gas protection welding; (7) annealing; and (8) sand blasting the spot welded optical axis. The method backs the welding seams with the 80% Ar +20% CO2 mixed gas protection welding, is beneficial to ensuring the welding quality of the welding seams, improves the mechanical properties of the welding seams, welds the outer layer with the submerged arc welding, and has the advantages of high working efficiency of welding, low labor intensity and good working environment.
Description
Technical field
The present invention relates to a kind of welding method of gusset and optical axis of machine shaft.
Background technology
At present, in electromechanics trade, the muscle of machine shaft and the welding of optical axis be general, and what adopt is electrogas process, manual arc soldering method or method that the two combines.
The muscle of machine shaft generally adopts Q235-B or Q345-B material, material such as optical axis generally adopts 35,45,30CrMo, 35CrMo or 40Cr.Because the welding of muscle and optical axis is the welding between the xenogenesis steel, and the size of muscle and optical axis is all bigger, need preheating so weld as last, and postwelding need heat-treat, just can prevent generation of defects such as weld crack.No matter be electrogas process or manual arc soldering method, or the two method that combines, welding efficiency is all lower, and the welding job environment is poor; And when only adopting electrogas process, be easy to generate pore and slag inclusion, influence the mechanical performance of weld seam.
Summary of the invention
The object of the present invention is to provide a kind of welding efficiency high, the welding job environment is good, the gusset of the machine shaft that the weld seam mechanical performance is high and the welding method of optical axis.
The objective of the invention is to realize through following technical scheme:
It may further comprise the steps:
(1) optical axis is preheated to 250 ℃-300 ℃, winches on the weld clip optical axis after the preheating fixing;
(2) on optical axis, optical axis evenly is divided into the N five equilibrium with indexing means, N >=3, N is identical with the quantity of gusset, progressively each gusset spot welding is fixed on the optical axis then; Detect the optical axis temperature, if the optical axis temperature is lower than preheat temperature, the optical axis that then should be again point be welded gusset is preheated to 250 ℃-300 ℃ again;
(3) optical axis is hung on the turning rolls positioner of automatic submerged-arc welding machine, adopt 80%Ar+20%CO
2Mixed gas arc welding is welded; The weld seam of step (2) spot welding is extended to the whole piece weld seam, and the length of weld seam equals the length of gusset, and welding sequence is: behind welding article one weld seam; Optical axis is rotated 180 °; Weld another weld seam of symmetric position again, by that analogy, form the ground floor weld seam thus; Welding condition is: welding current is 250A-300A, and weldingvoltage is 20V-35 V, and speed of welding is 5 mm/s-10 mm/s, and gas flow is 15 L/min-20L/min, and dry extension of electrode is 8 mm-16 mm, and temperature retention time is 2 h-3 h;
(4) weld seam and the ground floor weld seam of the clean spot welding of polishing, and the dye penetrant inspection detection is qualified;
(5) according to designing requirement, with Lincoln weld welding second layer weld seam, welding sequence is identical with welding sequence in the step (3), welding condition also with step (3) in welding condition identical;
(6) on the intact optical axis of submerged arc welding, adopt 80%Ar+20%CO
2The mixed gas arc welding point welds dividing plate, and the quantity of dividing plate is identical with the quantity of gusset, and all dividing plates are on same plane, and welding sequence is: after welding first dividing plate, optical axis is rotated 180 ° of another part dividing plates that weld symmetric position again, by that analogy; Welding condition is identical with welding condition in the step (3);
(7) optical axis after will welding is sent into annealing furnace annealing; Before sending into annealing furnace, the annealing furnace furnace temperature is no more than 300 ℃, and the temperature difference of furnace temperature and optical axis is no more than 260 ℃;
(8) to the optical axis processing of sandblasting after the welding.
The value of N is preferably 6 in the said step (2).
Welding current in the said step (3) is preferably 255 A-280A; Weldingvoltage is preferably 26 V-32V, and speed of welding is preferably 6 mm/s-8mm/s, and gas flow is preferably 16 L/min-18L/min; Dry extension of electrode is preferably 10 mm-14 mm, and temperature retention time is preferably 2.5 h.
Polishing in the said step (4) can be the gas grinder buffing.
Lincoln weld in the said step (5) can be adopted downhand welding or fillet welding in the flat position, and single-pass welding is wide to be 7mm, and single track leg height is 7mm.
The present invention adopts 80%Ar+20%CO
2The mixed gas arc welding backing weld seam helps guaranteeing the welding quality of weld seam, improves the weld seam mechanical performance, outerly adopts the automatic submerged-arc welding, and welding job efficient is high, and labour intensity is little, good work environment.
Description of drawings
Fig. 1 is the machine shaft structural representation;
Fig. 2 is Fig. 1 machine shaft left view;
Fig. 3 is Lincoln weld welding second layer weld seam operational circumstances sketch map;
Fig. 4 is the welding line structure sketch map of gusset and optical axis joint.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
With reference to accompanying drawing, present embodiment may further comprise the steps:
(1) optical axis 1 is preheated to 260 ℃ ± 10 ℃, winches on the weld clip optical axis after the preheating fixing;
(2) on optical axis 1, optical axis 1 evenly is divided into 6 five equilibriums, progressively 6 gusset 3 spot welding is fixed on the optical axis 1 then with indexing means; Detect optical axis 1 temperature, if optical axis 1 temperature is lower than preheat temperature, the optical axis 1 that then should be again point be welded gusset 3 is preheated to 260 ℃ ± 10 ℃ again;
(3) optical axis 1 is hung on the turning rolls positioner (not shown) of automatic submerged-arc welding machine, adopt 80%Ar+20%CO
2Mixed gas arc welding is welded; The weld seam of step 2 spot welding is extended to a whole piece weld seam, and the length of weld seam equals the length of gusset, and welding sequence is: behind welding article one weld seam; Optical axis 1 is rotated 180 °; Weld another weld seam of symmetric position again, by that analogy, form the ground floor weld seam thus; Welding condition is: welding current is 255A-280A, and weldingvoltage is 26V-32V, and speed of welding is 6mm/s-8mm/s, and gas flow is 16 L/min-18L/min, and dry extension of electrode is 10mm-14mm, and temperature retention time is 2.5h;
(4) with the weld seam and the ground floor weld seam 6 of the clean spot welding of gas grinder buffing, and painted detection flaw detection is qualified;
(5) according to designing requirement; With Lincoln weld welding second layer weld seam 7; Welding wire for submerged-arc welding 5 is melted in the joint of optical axis 1 and gusset 3 through behind the submerged arc welding gun 4, forms second layer weld seam 7; Welding sequence is identical with welding sequence in the step 3, welding condition also with step 3 in welding condition identical;
(6) on the intact optical axis 1 of submerged arc welding, adopt 80%Ar+20%CO
2The mixed gas arc welding point welds 2,6 dividing plates of 6 dividing plates on same plane, and welding sequence is: after welding first dividing plate, 180 ° of another part dividing plates that weld symmetric position are again rotated in rotating shaft, by that analogy; Welding condition is identical with welding condition in the step 3;
(7) optical axis after will welding is sent into annealing furnace annealing; Before sending into annealing furnace, the annealing furnace furnace temperature is no more than 300 ℃, and the temperature difference of furnace temperature and optical axis is no more than 260 ℃;
(8) to optical axis 1 processing of sandblasting after the welding.
Downhand welding or fillet welding in the flat position are adopted in Lincoln weld in the said step (5), and single-pass welding is wide to be 7mm, and single track leg height is 7mm.
Claims (4)
1. the welding method of the gusset of a machine shaft and optical axis is characterized in that, may further comprise the steps:
(1) optical axis is preheated to 250 ℃-300 ℃, winches on the weld clip optical axis after the preheating fixing;
(2) on optical axis, with indexing means optical axis evenly is divided into 6 five equilibriums, the quantity of gusset also is 6, progressively each gusset spot welding is fixed on the optical axis then; Detect the optical axis temperature, if the optical axis temperature is lower than preheat temperature, the optical axis that then should be again point be welded gusset is preheated to 250 ℃-300 ℃ again;
(3) optical axis is hung on the turning rolls positioner of automatic submerged-arc welding machine; Adopt 80%Ar+20%CO2 mixed gas arc welding to weld, the weld seam of step (2) spot welding is extended to the whole piece weld seam, the length of weld seam equals the length of gusset; Welding sequence is: behind welding article one weld seam; Optical axis is rotated 180 °, weld another weld seam of symmetric position again, form the ground floor weld seam thus; Welding condition is: welding current is 250A-300A, and weldingvoltage is 20V-35V, and speed of welding is 5mm/s-10mm/s, and gas flow is 15L/min-20L/min, and dry extension of electrode is 8mm-16 mm, and temperature retention time is 2h-3h;
(4) weld seam and the ground floor weld seam of the clean spot welding of polishing, and the dye penetrant inspection detection is qualified;
(5) according to designing requirement, with Lincoln weld welding second layer weld seam, welding sequence is identical with welding sequence in the step (3), welding condition also with step (3) in welding condition identical;
(6) on the intact optical axis of submerged arc welding, adopt 80%Ar+20%CO2 mixed gas arc welding point to weld dividing plate; The quantity of dividing plate is identical with the quantity of gusset; All dividing plates are on same plane; Welding sequence is: after welding first dividing plate, optical axis is rotated 180 ° of another part dividing plates that weld symmetric position again, by that analogy; Welding condition is identical with welding condition in the step (3);
(7) optical axis after will welding is sent into annealing furnace annealing; Before sending into annealing furnace, the annealing furnace furnace temperature is no more than 300 ℃, and the temperature difference of furnace temperature and optical axis is no more than 260 ℃;
(8) to the optical axis processing of sandblasting after the welding.
2. the welding method of the gusset of machine shaft according to claim 1 and optical axis; It is characterized in that the welding current in the said step (3) is 255A-280A, weldingvoltage is 26V-32V; Speed of welding is 6mm/s-8mm/s; Gas flow is 16L/min-18L/min, and dry extension of electrode is 10mm-14mm, and temperature retention time is 2.5h.
3. the welding method of the gusset of machine shaft according to claim 1 and 2 and optical axis is characterized in that, the polishing in the said step (4) is the gas grinder buffing.
4. the welding method of the gusset of machine shaft according to claim 1 and 2 and optical axis is characterized in that, downhand welding or fillet welding in the flat position are adopted in the Lincoln weld in the said step (5), and single-pass welding is wide to be 7mm, and single track leg height is 7mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010102265583A CN101879666B (en) | 2010-07-15 | 2010-07-15 | Method for welding gusset and optical axis of rotating shaft of motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102265583A CN101879666B (en) | 2010-07-15 | 2010-07-15 | Method for welding gusset and optical axis of rotating shaft of motor |
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| CN101879666A CN101879666A (en) | 2010-11-10 |
| CN101879666B true CN101879666B (en) | 2012-03-21 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104128725B (en) * | 2013-06-27 | 2016-05-04 | 国家电网公司 | For weld the positioning tool of gusset on cylindrical object |
| CN104785911A (en) * | 2015-04-27 | 2015-07-22 | 江苏金通灵流体机械科技股份有限公司 | Hollow spindle and solid spindle nose welding method |
| CN106238878A (en) * | 2016-08-17 | 2016-12-21 | 安徽鼎恒再制造产业技术研究院有限公司 | A kind of shaft-like workpiece submerged welding process |
| CN108127310B (en) * | 2017-11-10 | 2020-06-09 | 武汉船用机械有限责任公司 | Hydraulic cylinder body rib plate welding tool and welding method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4760241A (en) * | 1985-04-26 | 1988-07-26 | Nippon Kokan Kabushiki Kaisha | Method of high-speed rotation arc automatic fillet welding |
| JP2007313524A (en) * | 2006-05-24 | 2007-12-06 | Jfe Engineering Kk | Welding method for extremely thick steel plate |
| CN101491855A (en) * | 2008-05-16 | 2009-07-29 | 中冶天工上海十三冶建设有限公司 | T, L type heavy-plate joint fusion-penetration welding method |
| CN101905366A (en) * | 2009-06-05 | 2010-12-08 | 南通虹波风电设备有限公司 | Carbon arc gouging-free welding method of bottom flange angle seam |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11216569A (en) * | 1998-01-28 | 1999-08-10 | Nippon Steel Weld Prod & Eng Co Ltd | Fillet welding of ultra thick steel plate |
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2010
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4760241A (en) * | 1985-04-26 | 1988-07-26 | Nippon Kokan Kabushiki Kaisha | Method of high-speed rotation arc automatic fillet welding |
| JP2007313524A (en) * | 2006-05-24 | 2007-12-06 | Jfe Engineering Kk | Welding method for extremely thick steel plate |
| CN101491855A (en) * | 2008-05-16 | 2009-07-29 | 中冶天工上海十三冶建设有限公司 | T, L type heavy-plate joint fusion-penetration welding method |
| CN101905366A (en) * | 2009-06-05 | 2010-12-08 | 南通虹波风电设备有限公司 | Carbon arc gouging-free welding method of bottom flange angle seam |
Non-Patent Citations (1)
| Title |
|---|
| 董亚庚.DF_7型机车柴油机机体内筋板裂纹和焊修的探讨.《内燃机车》.2007,(第12期), * |
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