CN101134259A - Method for welding electric machine rotor copper bar coil by using high-frequency soldering machine - Google Patents

Method for welding electric machine rotor copper bar coil by using high-frequency soldering machine Download PDF

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Publication number
CN101134259A
CN101134259A CNA2007100591887A CN200710059188A CN101134259A CN 101134259 A CN101134259 A CN 101134259A CN A2007100591887 A CNA2007100591887 A CN A2007100591887A CN 200710059188 A CN200710059188 A CN 200710059188A CN 101134259 A CN101134259 A CN 101134259A
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CN
China
Prior art keywords
welding
copper bar
copper
brazing machine
frequency brazing
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Application number
CNA2007100591887A
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Chinese (zh)
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CN100469502C (en
Inventor
李卫红
张俊新
单庆臣
元哲广
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天津市天发重型水电设备制造有限公司
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Priority to CNB2007100591887A priority Critical patent/CN100469502C/en
Publication of CN101134259A publication Critical patent/CN101134259A/en
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Publication of CN100469502C publication Critical patent/CN100469502C/en

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Abstract

The present invention discloses welding process of copper bar and coils in motor rotor with a high frequency brazing machine. The welding process includes the following steps: 1. pressing the welded workpieces on the inducer; 2. heating weld junction, repair welding and shaping; 3. turning the copper bar automatically and welding its other weld junction; turning the copper bar automatically to the initial welding position; and 5. ending. The present invention has the advantages of high welding efficiency, high welding quality, high material utilizing rate, etc.

Description

Welding method with high frequency brazing machine welding rotor copper bar coil

Technical field

The invention belongs to welding method, particularly be welding method with high frequency brazing machine welding rotor copper bar coil.

Background technology

At present, in generating equipment, rotor coil is one of very crucial parts, plays crucial effect in equipment operation.Large-scale generating equipment rotor coil adopts red copper board welding processing to make.The quality of red copper board mass of coil directly affects the performance of generating equipment, and red copper board mass of coil depends on welding quality to a great extent.

The mechanical means coiling is adopted in domestic prior art red copper winding displacement circle processing, promptly, rotor coil turns to spirality through strip on edge winding machine with copper bar, carries out mechanically actuated continuously by counter clockwise direction from top to bottom at the edge-wind grinding tool that special use is set on the strip on edge winding machine automatically on strip on edge winding machine.Copper bar in the coiling process, the tension attenuation of copper bar outer, interior along the pressurized thickening, as surpass the tolerance dimension of lead maximum ga(u)ge in the coil copper bar after the coiling along size, need repair.

Through the coil after the above-mentioned strip on edge winding machine coiling, technology falls behind, poor electric conductivity, and there is rough phenomenon on the copper bar surface, and corner has slight crack easily, and weld bond is defectiveness also.In the world, the country that has sophisticated equipment adopts induction brazing automation special equipment welding processing already, but external red copper winding displacement circle induction brazing automation special equipment involves great expense, and domestic enterprise is difficult to bear.

Summary of the invention

At present, the objective of the invention is to overcome the deficiency of above-mentioned technology, provide on a kind of high frequency brazing machine of developing special welding rotor copper bar coil applicant oneself four of the coil be made up of copper bar contended and dock soldering, guarantee that the welding coil has excellent conducting performance, postwelding adopts the hydraulic pressure reshaping device to carry out leveling and handles, simple to operate, welding quality can be protected, a kind of welding method with high frequency brazing machine welding rotor copper bar coil that automaticity is high.

The technical scheme that solves the problems of the technologies described above is:

A kind of welding method with high frequency brazing machine welding rotor copper bar coil, described welding method is undertaken by following step:

1). welded piece is placed on the inductor compresses: two soldered copper bars are lain on the induction coil of high frequency brazing machine, and all the other positions of copper bar are supported also and are pressed on workbench and the anchor clamps, place weld tabs between two copper bar weld bonds; Be pressed on two soldered copper bars with the copper briquetting, the pressure head in the Work-sheet pressing mechanism on the high frequency brazing machine is pressed on the copper briquetting;

2). heating weld bond, artificial repair welding, correction shaping: to the high frequency induction power supply energising of high frequency brazing machine, make the weld bond and the weld tabs of two copper bars of induction coil eddy-current heating, when weld tabs reaches melting state, manually fill the back and cut off the induction coil power supply with welding wire, treat to open Work-sheet pressing mechanism again after weld tabs solidifies, induction coil retreats with moving frame and leaves copper bar, and the hydraulic pressure reshaping device of mobile high frequency brazing machine makes the integer head of this hydraulic pressure reshaping device proofread and correct shaping to the welding position;

3). copper bar rotates automatically, welding copper bar opposite side weld bond: after finishing copper bar one face down bonding and connecing, the mainframe that drives high frequency brazing machine is given up the throne automatically along guide rail, workbench and anchor clamps carry copper bar dextrorotation turnback, the mainframe that drives high frequency brazing machine again automatically resets along guide rail, copper bar opposite side weld bond is lain on the induction coil of high frequency brazing machine weld, welding step is according to above-mentioned steps 1), 2) carry out;

4). copper bar rotates automatically, gets back to initial welding position: after welding was finished to copper bar opposite side weld bond, the mainframe of high frequency brazing machine was given up the throne automatically along guide rail, and workbench and anchor clamps carry copper bar (7) and are rotated counterclockwise 180 degree, get back to initial welding position;

5). finish.

The invention has the beneficial effects as follows: welding method of the present invention is that the present invention has overcome the defective of manual welding copper bar coil, automaticity height, welding efficiency height at high frequency brazing machine welding rotor copper bar coil; After reshaping device of the present invention was handled the shaping of weld bond, the weld bond quality was good; The present invention can adopt double, and the welding efficiency height improves stock utilization to 99-100%.Can improve the welding production environment, alleviate labor strength.Copper bar coil after the welding is had following advantage:

Geometry good, improve the coil grade of tolerance.

2. can enlarge the design size scope.

3. reduce the rotor axial size, reduce the unit cost.

4. improve the product appearance quality.

5. can produce the large-size machine pole coil of 8x65 with upper section.

6. save electric energy 30-40%.

7. improve stock utilization to 99-100%

8. reduced annealing, operation such as the blanking of colding pressing, insulate, pole body hot pressing, cleaning.

9. improve the coil production environment, alleviated labor strength.

Description of drawings

Fig. 1 is a front view of the present invention;

Fig. 2 is that mainframe moves the back working state schematic representation to workbench and anchor clamps among Fig. 1;

Fig. 3 is that C-C analyses and observe the right view that shows mainframe among Fig. 1;

Fig. 4 is an A-A cutaway view among Fig. 3;

Fig. 5 is a B-B cutaway view among Fig. 3;

Fig. 6 is partly cut-away's enlarged drawing of induction brazing mechanism 30 among Fig. 3;

Fig. 7 is workbench and an anchor clamps schematic diagram among Fig. 1;

Fig. 8 is the vertical view of Fig. 7;

Fig. 9 is a D-D direction elevating mechanism running part syndeton schematic diagram among Fig. 7;

Figure 10 is a copper bar welding schematic diagram.

" explanation of sequence number in the accompanying drawing "

1: guide rail 2: driving mechanism 3: motor 4: leading screw 6: nut

7: workpiece 10: base 20: mainframe 21: entablature 22: moving frame

23: after-poppet 24: fore-stock 25: base plate 26: slideway

27: track 28: oil cylinder supporting plate 29: bracing frame 30: induction brazing mechanism

31: induction coil 32: high frequency induction power supply 33: pressure head body 34: briquetting 35: pressure head

36: handle 37: supporting plate 38: groove 40: Work-sheet pressing mechanism

41: connect pin 42: hinge 43: pivot link 44: swing connecting bar

45: hinge 46: bearing pin 60: hydraulic pressure reshaping device 61: oil cylinder

62:U type dressing stick 63: integer 70 workbench 71: reducing gear

72: power shaft 73: output shaft 74: turntable 80: anchor clamps

81-1,81-2,81-3,81-4: connecting axle 82: screw rod 83: motor

84: bevel gear turns to header tank 84-1,84-2: bevel gear turns to branch mailbox

85a: steady job table top 85b: active operation table top 86: worm gear

87: bevel gear reductor 88: connecting plate 89: clamp fixing plate

91: elevating mechanism 92: output shaft 93: fixture mount

100: workbench and anchor clamps

The specific embodiment

Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.

The invention provides a kind of welding method with high frequency brazing machine welding rotor copper bar coil, the present invention is the welding of finishing the rotor copper bar coil on high frequency brazing machine, and it is bright to be necessary that therefore the structure of this high frequency brazing machine is carried out institute:

To shown in Figure 6, the high frequency brazing machine of welding rotor copper bar coil comprises: base 10, mainframe 20, moving frame 22, induction brazing mechanism 30, workbench and anchor clamps 100 with two guide rails 1 as Fig. 1.

Described mainframe 20 bottoms are provided with the driving mechanism 2 that it is moved along guide rail 1, this driving mechanism 2 is by the leading screw that is connected with motor 34 and be positioned at the nut 6 that mainframe 20 bottoms are fitted on the leading screw 4 and form, and is provided with the slideway 26 parallel with guide rail 1 on the top of mainframe 20.Described motor 3 is arranged on the middle part of base 10 opposite sides, and the output shaft of motor 3 connects leading screw 4, and this leading screw 4 is supported on the bracing frame 29 of base 10 centres, and nut 6 is fixed in the base plate 25 (there is explanation the back) of mainframe 20 bottoms.

What described moving frame 22 was slided is supported on the slideway 26, and a side of closing on workbench and anchor clamps 100 at moving frame 22 is provided with induction brazing mechanism 30.

Described workbench and anchor clamps 100 are fixed between two guide rails 1 of base 10 1 sides, and this workbench and anchor clamps 100 comprise the workbench 70 of supporting workpiece 7 and the anchor clamps 80 of clamping work pieces 7.

Described mainframe 20 is by being interconnected to constitute as underframe, and this framework comprises: base plate 25, two fore-stocks 24, two after-poppets 23, entablature 21, two slideways 26.Described base plate 25 is positioned at mainframe 20 bottoms, and what slided in base plate 25 left and right sides is supported on two guide rails 1, and nut 6 is arranged on middle part in this base plate 25.Described after-poppet 23 is erect with the fore-stock 24 that is higher than after-poppet 23 and is fixed on both sides, base plate 25 front and back, and entablature 21 is connected between two fore-stock 24 tops.The position symmetry of described two slideways 26 is connected between fore-stock 24 and the after-poppet 23, is respectively arranged with above two slideways 26 and supports the track 27 that moving frame 22 both sides realize being slidingly matched.

Hydraulic pressure reshaping device 60 to workpiece 7 shapings also is housed on described mainframe 20, and described hydraulic pressure reshaping device 60 comprises: oil cylinder 61, U type dressing stick 62, integer 63, oil cylinder supporting plate 28; Described oil cylinder supporting plate 28 1 sides are provided with the groove 38 that hangs on entablature 21 slideways and can slide along this slideway, and the groove of the slideway of the crossbeam 21 in the present embodiment and oil cylinder supporting plate 28 1 sides is the projection of dove-tail form and the groove 38 that matches with it.Oil cylinder supporting plate 28 opposite sides are U type dressing stick 62 fixedly, and oil cylinder 61 is arranged on above the U type dressing stick 62; Described integer 63 is arranged on the pistons end of oil cylinder 61, and this integer 63 is passed U type dressing stick 62 and entered in its U type groove.During 60 work of hydraulic pressure reshaping device, now induction brazing mechanism 30 usefulness hand propelled are in the state of stepping down that retreats, move it the position of workpiece weld bond again with hand propelled hydraulic pressure reshaping device 60, shaping is carried out in primer fluid pressing system (figure does not show) work.

Described induction brazing mechanism 30 comprises: high frequency induction power supply 32, induction coil 31, Work-sheet pressing mechanism 40, be pressed in the briquetting 34 above the workpiece 7.Described high frequency induction power supply 32 is arranged on the moving frame 22 away from workbench and anchor clamps 100 1 sides, is set with supporting plate 37 on the moving frame 22 of contiguous workbench and anchor clamps 100 1 sides, and the induction coil 31 that contacts with workpiece 7 is arranged on this supporting plate 37; Described Work-sheet pressing mechanism 40 is pressed on the briquetting 34.Above-mentioned supporting plate 37 is to be made of two L type bent plates, and two inductors 31 and Work-sheet pressing mechanism 40 all are fixed on the supporting plate 37.Be connected by cable between induction brazing mechanism 30 medium-high frequency induction power supplies 32 and the induction coil 31, finish the welding of workpiece 7 when induction brazing mechanism 30 after, make a concession the position thereafter with hand propelled, be convenient to 60 work of hydraulic pressure reshaping device.

The hydraulic pressure reshaping device 60 of the embodiment of the invention and induction brazing mechanism 30 are set to two respectively, and its structure is identical, and the position symmetry is commonly referred to as the double eddy-current heating, and structure of the present invention can improve working (machining) efficiency.

Described Work-sheet pressing mechanism 40 comprises: pressure head 35, the toggle that is fixed on pressure head body 33 on the supporting plate 37, is driven by handle 36.

Described pressure head body 33 inside have and hold described toggle activity space and make pressure head 35 move up and down tubular column.Specifically, described pressure head body 33 is to be connected to form by connecting pin 41 by the halved body of symmetry, and pressure head body 33 upper inner are formed with the space, are provided with toggle in this space; Form a tubular column in pressure head body 33 bottoms, the pressure head 35 that moves up and down is housed in this tubular column.

Described pressure head 35 1 ends are pressed on the briquetting 34, and its other end inserts in pressure head body 33 tubular columns and is connected with toggle; Described toggle is: handle 36 1 ends protrude pressure head body 33 outsides, handle 36 other ends are hinged with the hinge 42 that is fixed on pressure head body 33 inside, on the handle 36 of pressure head body 33 inside, also be fixed with bearing pin 46, this bearing pin 46 1 ends protrude behind the slotted hole that passes on the swing connecting bar 44 hinged with pivot link 43 1 ends, pivot link 43 other ends are hinged with pressure head 35 other ends of the tubular column that is positioned at pressure head body 33, and described swing connecting bar 44 other ends are hinged with the hinge 45 that is fixed on pressure head body 33 inside.

Described workbench 70 has rotational structure, and this rotational structure comprises: reducing gear 71 and turntable 74, and the power shaft 72 of this reducing gear 71 connects motor, and its output shaft 73 connects turntable 74; Described anchor clamps 80 are pressing plates of energy clamping work pieces, and this pressing plate is supported on the turntable 74.

Described workbench 70 also includes steady job table top 85a and active operation table top 85b; Described steady job table top 85a is fixed on the turntable 74, steady job table top 85a is provided with and drives the elevating mechanism 91 that active operation table top 85b moves up and down, and this elevating mechanism 91 comprises: motor 83, bevel gear reductor 87, bevel gear turn to header tank 84 and 2 bevel gears to turn to branch mailbox 84-1,84-2, connecting axle 81-1,81-2,81-3,81-4; Described motor 83 connects bevel gear reductor 87, bevel gear reductor 87 connects bevel gear and turns to header tank 84, bevel gear turns to two output shafts 92 of header tank 84-1 both sides to connect 2 bevel gears respectively and turns to branch mailbox 84-1,84-2, turn to branch mailbox 84-1 from described 2 bevel gears, the both sides of 84-2 are exported 2 connecting axle 81-1 separately, 81-2,81-3,81-4, described connecting axle 81-1,81-2,81-3,81-4 connects the worm gear 86 that is arranged on four edges of steady job table top 85a respectively, this worm gear 86 meshes with the screw rod 82 that is installed in four edges of active operation table top 85b respectively, promptly these screw rod 82 upper ends are fixed in the screw of four edges of active operation table top 85b by screw thread, the through hole of steady job table top 85a is passed in the lower end of this screw rod 82, like this, active operation table top 85b can finish elevating movement on steady job table top 85a.

Described anchor clamps 80 are made up of connecting plate 88 and fixture mount 93, this connecting plate 88 is fixed on the steady job table top 85a, the bottom of this fixture mount 93 is fixed on the connecting plate 88, and the top of this fixture mount 93 is passed its end face of active operation table top 85b and supported and clamping work pieces 7.

Above-mentioned workpiece 7 is the copper bars that are used to assemble electric generating set rotor.

Describe below in conjunction with 10 pairs of welding methods with high frequency brazing machine welding rotor copper bar coil of accompanying drawing: welding method of the present invention is undertaken by following step:

1). will be emitted on the inductor by bit copper and compress: two soldered copper bars 7 are lain on the induction coil 31 of high frequency brazing machine, and all the other positions of copper bar 7 are supported also and are pressed on workbench and the anchor clamps 100, place weld tabs between two copper bar 7 weld bonds; Be pressed on two soldered copper bars 7 with copper briquetting 34, the pressure head 35 in the Work-sheet pressing mechanism 40 on the high frequency brazing machine is pressed on the copper briquetting 34.For better making copper bar 7 location, the handle 36 that manually can push hard in the part hold-down mechanism 40 of starting building fastens copper briquetting 34, makes two soldered copper bars 7 contact more firm with induction coil 31.

2). heating weld bond, artificial repair welding, correction shaping: to high frequency induction power supply 32 energisings of high frequency brazing machine, make the weld bond and the weld tabs of two copper bars 7 of induction coil 31 eddy-current heating, when weld tabs reaches melting state, manually fill the back and cut off induction coil 31 power supplys with welding wire, treat to open Work-sheet pressing mechanism 40 again after weld tabs solidifies, induction coil 31 retreats with moving frame 22 and leaves copper bar 7, the hydraulic pressure reshaping device of mobile high frequency brazing machine makes integer 63 pairs of welding positions of this hydraulic pressure reshaping device proofread and correct shaping;

3). copper bar rotates automatically, welding copper bar 7 opposite side weld bonds: after finishing copper bar 7 one face down bondings and connecing, the mainframe 20 that drives high frequency brazing machine is given up the throne automatically along guide rail (1), workbench and anchor clamps 100 carry copper bar 7 dextrorotation turnbacks, the mainframe 20 that drives high frequency brazing machine again automatically resets along guide rail 1, copper bar 7 opposite side weld bonds are lain on the induction coil 31 of high frequency brazing machine weld, welding step is according to above-mentioned steps 1), 2) carry out;

4). copper bar rotates automatically, gets back to initial welding position: after welding was finished to copper bar 7 opposite side weld bonds, the mainframe 20 of high frequency brazing machine was given up the throne automatically along guide rail 1, and workbench and anchor clamps 100 carry copper bar 7 and are rotated counterclockwise 180 degree, get back to initial welding position;

5). finish.

Described weld tabs is the solder paper tinsel.

E represents copper bar 7 welding positions among Figure 10.

Claims (2)

1. welding method with high frequency brazing machine welding rotor copper bar coil is characterized in that described welding method is undertaken by following step:
1). welded piece is placed on the inductor compresses: soldered two copper bars (7) are lain on the induction coil (31) of high frequency brazing machine, all the other positions of copper bar (7) are supported and are pressed on workbench and the anchor clamps (100), place weld tabs between two copper bars (7) weld bond; Be pressed on soldered two copper bars (7) with copper briquetting (34), the pressure head (35) in the Work-sheet pressing mechanism (40) on the high frequency brazing machine is pressed on the copper briquetting (34);
2). heating weld bond, artificial repair welding, correction shaping: to high frequency induction power supply (32) energising of high frequency brazing machine, make the weld bond and the weld tabs of induction coil (31) two copper bars of eddy-current heating (7), when weld tabs reaches melting state, manually fill the back and cut off induction coil (31) power supply with welding wire, treat to open Work-sheet pressing mechanism (40) again after weld tabs solidifies, induction coil (31) retreats with moving frame (22) and leaves copper bar (7), the hydraulic pressure reshaping device of mobile high frequency brazing machine makes the integer head (63) of this hydraulic pressure reshaping device proofread and correct shaping to the welding position;
3). copper bar rotates automatically, welding copper bar (7) opposite side weld bond: after finishing copper bar (7) one face down bondings and connecing, the mainframe (20) that drives high frequency brazing machine is given up the throne automatically along guide rail (1), workbench and anchor clamps (100) carry copper bar (7) dextrorotation turnback, the mainframe (20) that drives high frequency brazing machine again automatically resets along guide rail (1), copper bar (7) opposite side weld bond is lain on the induction coil (31) of high frequency brazing machine weld, welding step is according to above-mentioned steps 1), 2) carry out;
4). copper bar rotates automatically, get back to initial welding position: after welding is finished to copper bar (7) opposite side weld bond, the mainframe of high frequency brazing machine (20) is given up the throne automatically along guide rail (1), and workbench and anchor clamps (100) carry copper bar (7) and are rotated counterclockwise 180 degree, get back to initial welding position;
5). finish.
2. according to the welding method of welding the rotor copper bar coil described in the claim 1 with high frequency brazing machine, it is characterized in that described weld tabs is the solder paper tinsel.
CNB2007100591887A 2007-08-22 2007-08-22 Method for welding electric machine rotor copper bar coil by using high-frequency soldering machine CN100469502C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2007100591887A CN100469502C (en) 2007-08-22 2007-08-22 Method for welding electric machine rotor copper bar coil by using high-frequency soldering machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2007100591887A CN100469502C (en) 2007-08-22 2007-08-22 Method for welding electric machine rotor copper bar coil by using high-frequency soldering machine

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Publication Number Publication Date
CN101134259A true CN101134259A (en) 2008-03-05
CN100469502C CN100469502C (en) 2009-03-18

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102069252A (en) * 2010-11-25 2011-05-25 天津市天发重型水电设备制造有限公司 Method for manufacturing pole coil
CN102500862A (en) * 2011-11-08 2012-06-20 天津市天发重型水电设备制造有限公司 Device for supporting rotary workbench of welding machine
CN102744480A (en) * 2012-07-16 2012-10-24 陈建初 High-frequency sensing tin soldering machine and welding method
CN102990273A (en) * 2012-12-20 2013-03-27 苏州菱欧自动化设备有限公司 COB (Chip on Board) welding device
CN103192153A (en) * 2013-04-20 2013-07-10 张家口北方对焊机有限公司 Rocket engine jet pipe brazing strip automatic rolling point welding machine and rolling point welding process
CN103737169A (en) * 2013-12-06 2014-04-23 大连华夏泰克电气集团有限公司 Novel high frequency welding process for primary line of current transformer
CN104084706A (en) * 2014-06-27 2014-10-08 江苏天舒电器有限公司 Welding method for brass liquid distributor used for finned heat exchanger
CN104249203A (en) * 2013-06-26 2014-12-31 上海电气集团上海电机厂有限公司 Motor rotor end ring and guide bar brazing method
CN104505998A (en) * 2014-11-04 2015-04-08 天津市天发重型水电设备制造有限公司 Improvement of manufacturing process of large-size pole coil
CN104625281A (en) * 2014-12-15 2015-05-20 哈尔滨电气动力装备有限公司 Welding method for rotor copper end ring of shielded motor and copper strip splice
CN109483127A (en) * 2018-12-07 2019-03-19 上海电气电站设备有限公司 Turbine generator stator end upper and lower level coil thin space welder

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CN101388583B (en) * 2008-10-31 2011-09-21 天津市天发重型水电设备制造有限公司 Machining method for magnetic pole winding of four-angle welding motor

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102069252A (en) * 2010-11-25 2011-05-25 天津市天发重型水电设备制造有限公司 Method for manufacturing pole coil
CN102500862A (en) * 2011-11-08 2012-06-20 天津市天发重型水电设备制造有限公司 Device for supporting rotary workbench of welding machine
CN102744480A (en) * 2012-07-16 2012-10-24 陈建初 High-frequency sensing tin soldering machine and welding method
CN102990273A (en) * 2012-12-20 2013-03-27 苏州菱欧自动化设备有限公司 COB (Chip on Board) welding device
CN103192153A (en) * 2013-04-20 2013-07-10 张家口北方对焊机有限公司 Rocket engine jet pipe brazing strip automatic rolling point welding machine and rolling point welding process
CN103192153B (en) * 2013-04-20 2014-12-31 张家口北方对焊机有限公司 Rocket engine jet pipe brazing strip automatic rolling point welding machine and rolling point welding process
CN104249203B (en) * 2013-06-26 2016-08-24 上海电气集团上海电机厂有限公司 The end ring of rotor and sliver method for welding
CN104249203A (en) * 2013-06-26 2014-12-31 上海电气集团上海电机厂有限公司 Motor rotor end ring and guide bar brazing method
CN103737169A (en) * 2013-12-06 2014-04-23 大连华夏泰克电气集团有限公司 Novel high frequency welding process for primary line of current transformer
CN104084706A (en) * 2014-06-27 2014-10-08 江苏天舒电器有限公司 Welding method for brass liquid distributor used for finned heat exchanger
CN104084706B (en) * 2014-06-27 2015-12-02 江苏天舒电器有限公司 A kind of welding method of finned heat exchanger brass knockout
CN104505998A (en) * 2014-11-04 2015-04-08 天津市天发重型水电设备制造有限公司 Improvement of manufacturing process of large-size pole coil
CN104505998B (en) * 2014-11-04 2018-11-20 天津市天发重型水电设备制造有限公司 A kind of large size pole coil making apparatus
CN104625281A (en) * 2014-12-15 2015-05-20 哈尔滨电气动力装备有限公司 Welding method for rotor copper end ring of shielded motor and copper strip splice
CN109483127A (en) * 2018-12-07 2019-03-19 上海电气电站设备有限公司 Turbine generator stator end upper and lower level coil thin space welder

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