CN101557145B - Soldering method of conducting ring of motor rotor - Google Patents
Soldering method of conducting ring of motor rotor Download PDFInfo
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- CN101557145B CN101557145B CN2008100359466A CN200810035946A CN101557145B CN 101557145 B CN101557145 B CN 101557145B CN 2008100359466 A CN2008100359466 A CN 2008100359466A CN 200810035946 A CN200810035946 A CN 200810035946A CN 101557145 B CN101557145 B CN 101557145B
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Abstract
The invention relates to a soldering method of a conducting ring of a motor rotor. In the method, an end ring is heated through improving the structure of a conducting bar of a rotor and adopting a medium frequency induction way, and a super thick conducting ring of a high capacity motor rotor is soldered by the way that two brazing torches respectively assist heating the end head of the conducting bar and the excircle surface of the end ring. The soldering method of the conducting ring of the motor rotor has the advantages of good soldering quality and motor performance and quality improvement when being used for soldering the conducting ring of the high capacity motor rotor.
Description
Technical field
The present invention relates to large-size machine, relate in particular to the soldering method of conducting ring of motor rotor of large-size machine.
Background technology
Four utmost point asynchronous motors of at present domestic single-machine capacity maximum that can the independent research manufacturing are 25000KW 4P asynchronous motor, and the rated current of this motor is 1588A, and the starting current multiple is 5.54 times, and the motor synchronous rotating speed reaches 1500r/min.These parameters are to a pith of rotor---the soldering of end ring and rotor bar has proposed higher specification requirement.Between rotor bar and the end ring reliable electrical contact to be arranged.The joint area is enough big, could guarantee that the electric current that flows through the joint under electric motor starting, ruuning situation can not make this place's heating.Brazing quality directly has influence on motor performance and reliability.
In the motor manufacture process, what the soldering of end ring and rotor bar was generally adopted is medium frequency inductive brazing.Required welding machine power output determines during medium frequency inductive brazing, according to German eldec company theory, power is selected for use and should be followed following two basic principles: the one, and relevant with the rotor bar bonding area, be that the rotor bar cross sectional dimensions is big more, the sliver radical is many more, and required power output is big more (P=0.6KW/CM just
2* A); The 2nd, relevant with the end ring quality, the end ring quality is big more, and required power output is big more (P=4.5KW/KG*m) just.And must in the short time (2 minutes), reach welding region and could guarantee good welding effect, should not long-time heating and influence the copper product mechanical performance, the sliver specification 14mm * 71mm of 25000KW 4P asynchronous motor needs 115, end ring 483KG.Therefore, the power output of required intermediate frequency welding machine is far longer than the rated power of welding machine during the soldering of prior art, end ring need be divided tens sections with rotor bar welding, and the time of soldering heating is long, the mechanical performance of copper product that added thermal impact for a long time.
Therefore, soldering method of conducting ring of motor rotor of the prior art can not adapt to the soldering of the super thick conducting ring of the above large-size machine rotor of 25000KW 4P.
Summary of the invention
Technical problem to be solved of the present invention provides a kind of soldering method of conducting ring of motor rotor, adopt the super thick conducting ring of this method for welding soldering large-size machine rotor to have good brazing quality, can not influence motor properties and reliability, to overcome the deficiencies in the prior art.
In order to solve the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of soldering method of conducting ring of motor rotor, adopt following steps:
A is processed into chamfering with the outer corners at rotor bar two ends, and polishing removes oxide on surface and burr and clean greasy dirt, dries;
B lies in end ring on the rotor shelf, applies enough pasty state brazing fluxes in the groove of end ring pond, with vertical the hanging in of rotor, and fixing with driving, and make sliver and end ring pond groove no-float, on the sliver faying face, apply the pasty state brazing flux again;
C, between rotor bar preseting solder, uniform, on solder, put the powdery brazing flux again;
D, adopt the segmentation of Medium frequency induction mode that end ring is heated,, when temperature reaches 600 ℃ of left and right sides near the soldered fitting, distinguish assistant heating sliver terminations and end ring outer round surface with two brazing torches when end ring begins rubescently; Reach " R " shape weld seam that solder is melted fully and around end ring and rotor bar, form slyness up to heating; After treating that solder solidifies, rotary rotor shines the welding that this step method is finished hypomere end ring and sliver to next section end ring, finishes up to end ring and whole slivers welding;
E, postwelding allow the conducting ring natural cooling, remove brazing flux and residue with cleaning agent and burnisher when reducing to 150 ℃ of left and right sides, and dry the water mark.
F, last metalworking end ring cylindrical.
Described solder is selected BAg40CuZnSnNi scolder (material 322) for use.
During described preseting solder, operating personnel put on clean white phozy cotton and knit gloves.
Described employing Medium frequency induction mode is in the end ring heating, place mica sheet on the induction coil and regulate induction coil and end ring between keep gap about 1mm.
When described brazing torch heating sliver and end ring, brazing torch should move around.
Described every section weld seam is answered a through welding and has been welded, and the intersection of adjacent two sections weld seams should be overlapped.
Adopt technique scheme, the electronics rotor conducting ring of soldering method of conducting ring of motor rotor welding of the present invention has the high advantage of brazing quality, has improved motor properties and quality.
Description of drawings
The present invention is described in detail below in conjunction with the drawings and specific embodiments:
Fig. 1 is the structural representation after the rotor sliver chamfering of the present invention;
Fig. 2 is brazed seam segmentation schematic diagram among the present invention;
Fig. 3 is for adopting the braze-welded structure and the postwelding weld seam effect schematic diagram of rotor bar of the present invention and end ring.
Embodiment
Special soldering method of conducting ring of motor rotor at large-size machine of the present invention adopts following steps:
1, as shown in Figure 1, the outer corners with rotor bar 100 two ends of rotor is processed into 14 * 45 ° chamfering 101.After the outer corners chamfering with the sliver two ends, rotor bar has just reduced bonding area; The end ring outside diameter also can correspondingly reduce, and the end ring quality also reduces with regard to corresponding, has also just reduced the hop count of segmentation welding, shortened heating time, and can reduce the distortion of rotor mouse cage and not produce big internal stress, also can reduce even avoid taking place the phenomenon of rotor bar bending.
Because piece surface to be welded, processing before weldering and deposit and to be covered with oxide in the process inevitably, to be stained with grease and dust etc., these all can hinder liquid solder to sprawl joint filling on mother metal, and greasy dirt and the oxide of therefore removing piece surface are very necessary.The surface of solder also has oxide-film and greasy dirt, also must remove clean.
Therefore, in this step, after with the rotor bar chamfering, also to will polish to the surface in the about 50mm length range in rotor bar two ends with wire brush or rubber, remove oxide, deburring and clean greasy dirt on sliver, end ring, the solder with acetone or cleaning agent KC-E101, and dry.
2, end ring is lain on the rotor shelf, apply enough pasty state brazing fluxes in the groove of end ring pond, with vertical the hanging in of rotor, and it is fixing with driving, as shown in Figure 3, and make sliver 100 (it is concentric with axis that end ring should keep, and end face is perpendicular to axle with end ring 300 pond grooves 301 no-floats, be beneficial to the balance of rotor), on the sliver faying face, apply the pasty state brazing flux again;
3, as shown in Figure 3, preseting solder 400 between rotor bar 100, and is uniform, and operating personnel should put on clean white phozy cotton and knit gloves when placing solder, and then put the powdery brazing flux on solder.The use amount of solder should be can fill up end ring pond groove after the solder fusing in accordance with regulations.
During soldering, workpiece is to rely on the solder of fusing to solidify the firm joint of back formation.Therefore, the quality of soldering depends on solder to a great extent.In end ring and sliver brazing process, that select for use usually is conventional solder: BAg45CuZn (material 303) or BCu80AgP (material 204).And in the present invention, preferred BAg40CuZnSnNi (material 322).This solder fusing point is low, has good cross flow and fills play movement ability, brazed seam any surface finish, strength of joint height.And solder BAg40CuZnSnNi contains minor N i, can improve intensity, thermal endurance and the corrosion resistance of solder, improves the wetability of solder.Table 1 has been introduced the chemical composition and the performance of these three kinds of solders.
The chemical composition of table 1 solder and performance
4, on induction coil, put mica sheet, raise and regulate bolt, make between induction coil and the end ring to keep certain interval, about 1mm.Employing segmentation welding approximately can be divided into nine or ten sections weld seams, connects intermediate frequency power supply, with the Medium frequency induction mode end ring is heated.When end ring begins rubescently, when temperature reaches 600 ℃ of left and right sides near the soldered fitting,, reach brazing temperature simultaneously with assurance sliver and end ring with one brazing torch assistant heating sliver termination; And useful another brazing torch assistant heating end ring outer round surface, to reduce heating time.During heating, brazing torch should move around, and makes it even heating.Attention: unavailable flame directly heats solder.
Solder melts gradually when reaching brazing temperature, slowly forms the weld seam of " R " shape around end ring and sliver, and as required, the available metal rod is dragged on solder in the groove of end ring pond.After solder melts fully, and the brazed seam outer formed slick and sly fillet, and can cut off intermediate frequency power supply this moment, reduces to regulate bolt and unclamp induction coil.After solder solidifies, rotate counterclockwise rotor to next section end ring, repeat the welding that said method in this step is finished hypomere end ring and sliver again, up to end ring and all the slivers welding finish; Attention: every section weld seam is answered a through welding and has been welded, in order to avoid repeatedly repeat to add the thermal impact brazing quality.And the intersection of adjacent two sections weld seams 200 should be overlapped, promptly has overlapping 201, as shown in Figure 2.
Notice in the heating process that the control workpiece temperature changes, temperature can not be too high.Brazing temperature should be controlled within 640～740 ℃ of scopes.
5, after the welding, allow the conducting ring natural cooling, remove the brazing flux residue with 10% aqueous citric acid solution or KC-F105 when reducing to 150 ℃ of left and right sides, available wire brush, file etc. simultaneously, until remove clean till, and dry the water mark.
At last, with the conducting ring tune, finish the soldering of conducting ring other end end ring and rotor bar by above-mentioned steps.
6, the rotor bar 100 at conducting ring two ends and end ring 300 all soldering good after, last metalworking end ring cylindrical, the soldering position of exposing has the weld seam 200 of slick and sly " R " shape as shown in Figure 3.Wherein,
More than be exactly soldering method of conducting ring of motor rotor of the present invention, this method has following advantage:
1, in the brazing process, can obviously observe solder and melt the back fully and flow uniformly, fill up the joint gap rapidly, and overflow along rotor bar from the gap and to form smooth uniform soldering fillet, and be tangible recessed arc transition.
2, technical process is reasonable, and homogeneous heating heats up rapidly.After welding was finished, the visual examination rotor bar did not have crooked, and all solderings place, and brazed seam is smooth " R " shape as shown in Figure 4.
3, behind the metalworking end ring cylindrical,, find the place that no solder does not fill up with the brazed seam that lens examination is exposed, and flawless, shrinkage cavity slag inclusion, pore, brazing defect such as fusion not.
Therefore, adopt soldering method of conducting ring of motor rotor welding electronics rotor conducting ring of the present invention to have the high advantage of brazing quality, improved motor properties and quality.
But, it more than is exactly conducting ring of motor rotor braze-welded structure of the present invention, but, those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop on claim scope of the present invention to variation, the modification of the above embodiment.
Claims (6)
1. soldering method of conducting ring of motor rotor is characterized in that adopting following steps:
A is processed into chamfering with the outer corners at rotor bar two ends, and polishing removes oxide on surface and burr and clean greasy dirt, dries;
B lies in end ring on the rotor shelf, applies enough pasty state brazing fluxes in the groove of end ring pond, with vertical the hanging in of rotor, and fixing with driving, and make sliver and end ring pond groove no-float, on the sliver faying face, apply the pasty state brazing flux again;
C, between rotor bar preseting solder, uniform, on solder, put the powdery brazing flux again;
D, adopt the segmentation of Medium frequency induction mode that end ring is heated,, when temperature reaches 600 ℃ of left and right sides near the soldered fitting, distinguish assistant heating sliver terminations and end ring outer round surface with two brazing torches when end ring begins rubescently; Reach " R " shape weld seam that solder is melted fully and around end ring and rotor bar, form slyness up to heating; After treating that solder solidifies, rotary rotor shines the welding that this step method is finished hypomere end ring and sliver to next section end ring, finishes up to end ring and whole slivers welding;
E, postwelding allow end ring and whole slivers welding finish the conducting ring natural cooling that the back constitutes, and with cleaning agent and burnisher removing brazing flux and residue, and dry the water mark when reducing to 150 ℃ of left and right sides.
F, last metalworking end ring cylindrical.
2. soldering method of conducting ring of motor rotor according to claim 1 is characterized in that: described solder is selected the BAg40CuZnSnNi scolder for use.
3. soldering method of conducting ring of motor rotor according to claim 1 is characterized in that: during described preseting solder, operating personnel put on clean white phozy cotton and knit gloves.
4. soldering method of conducting ring of motor rotor according to claim 1 is characterized in that: described employing Medium frequency induction mode is in the end ring heating, place mica sheet on the induction coil and regulate induction coil and end ring between keep gap about 1mm.
5. soldering method of conducting ring of motor rotor according to claim 1 is characterized in that: when described brazing torch heating sliver and end ring, brazing torch should move around.
6. soldering method of conducting ring of motor rotor according to claim 1 is characterized in that: described every section weld seam is answered a through welding and has been welded, and the intersection of adjacent two sections weld seams should be overlapped.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008100359466A CN101557145B (en) | 2008-04-11 | 2008-04-11 | Soldering method of conducting ring of motor rotor |
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| CN2008100359466A CN101557145B (en) | 2008-04-11 | 2008-04-11 | Soldering method of conducting ring of motor rotor |
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| CN101557145A CN101557145A (en) | 2009-10-14 |
| CN101557145B true CN101557145B (en) | 2010-12-22 |
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| CN102255410A (en) * | 2010-05-19 | 2011-11-23 | 抚顺煤矿电机制造有限责任公司 | Welding structure and welding method for motor rotor bar and rotor end ring |
| CN102593993A (en) * | 2012-02-29 | 2012-07-18 | 北京中瑞蓝科电动汽车技术有限公司 | Electromotor and control method of electromotor |
| CN103401389A (en) * | 2013-07-31 | 2013-11-20 | 江苏经纬轨道交通设备有限公司 | Brazing structure for motor rotor |
| CN104578612B (en) * | 2013-10-21 | 2017-08-25 | 北京明诚技术开发有限公司 | It is a kind of to solve the method that large-scale self-starting rare earth permanent-magnet synchronization motor starts the radiating of cage bar |
| CN103722269B (en) * | 2013-12-31 | 2016-02-10 | 攀钢集团工程技术有限公司 | The welding method of rotor cage bar and short-circuited conducting sleeve |
| CN103779997B (en) * | 2013-12-31 | 2016-04-13 | 攀钢集团工程技术有限公司 | motor rotor cage bar and motor rotor |
| CN104625281B (en) * | 2014-12-15 | 2016-07-06 | 哈尔滨电气动力装备有限公司 | Shielding motor rotor copper end ring and copper bar connector welding method |
| CN105811699A (en) * | 2014-12-31 | 2016-07-27 | 上海电气集团上海电机厂有限公司 | End ring and conduction bar assembly structure of frequency conversion speed regulation motor rotor |
| CN105364247B (en) * | 2015-12-22 | 2017-08-25 | 南车株洲电机有限公司 | The anticracking welding method and anticracking soldered fitting of motor rotor end ring and sliver |
| CN107070148A (en) * | 2017-04-10 | 2017-08-18 | 无锡东元电机有限公司 | A kind of small-sized copper rotor and its welding method |
| CN107042347B (en) * | 2017-04-24 | 2019-03-19 | 中国电子科技集团公司第十四研究所 | A kind of high-frequency induction brazing method and high-frequency inductor of novel Feed Horn |
| CN109352111A (en) * | 2018-10-16 | 2019-02-19 | 中车株洲电机有限公司 | The welding method and structure of electric machine end ring and conducting bar |
| CN113427158B (en) * | 2021-06-24 | 2022-10-28 | 西安阿尔斯通永济电气设备有限公司 | Rotor brazing process |
| CN115302035A (en) * | 2022-09-14 | 2022-11-08 | 重庆水轮机厂有限责任公司 | Welding process of rotor end ring of asynchronous motor |
| CN115971599B (en) * | 2023-02-16 | 2023-08-01 | 安庆瑞迈特科技有限公司 | Brazing method for improving connection strength of large-capacity rotary target disc for CT bulb tube |
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| CN1182970A (en) * | 1996-11-15 | 1998-05-27 | 三菱电机株式会社 | Rotor of squirrel-cage induction motor and making method |
| CN2517535Y (en) * | 2001-11-21 | 2002-10-23 | 山西天海泵业有限公司 | Intermediate-frequency induction solderer for rotor of electrical machine |
| CN201038844Y (en) * | 2007-04-24 | 2008-03-19 | 中国北车集团永济电机厂 | Novel motor rotor structure |
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2008
- 2008-04-11 CN CN2008100359466A patent/CN101557145B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1182970A (en) * | 1996-11-15 | 1998-05-27 | 三菱电机株式会社 | Rotor of squirrel-cage induction motor and making method |
| CN2517535Y (en) * | 2001-11-21 | 2002-10-23 | 山西天海泵业有限公司 | Intermediate-frequency induction solderer for rotor of electrical machine |
| CN201038844Y (en) * | 2007-04-24 | 2008-03-19 | 中国北车集团永济电机厂 | Novel motor rotor structure |
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| CN101557145A (en) | 2009-10-14 |
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