CN105478989A - Welding process for outgoing line of air inner-cooled turbine generator - Google Patents
Welding process for outgoing line of air inner-cooled turbine generator Download PDFInfo
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- CN105478989A CN105478989A CN201610007512.XA CN201610007512A CN105478989A CN 105478989 A CN105478989 A CN 105478989A CN 201610007512 A CN201610007512 A CN 201610007512A CN 105478989 A CN105478989 A CN 105478989A
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- welding
- lead
- connector
- out wire
- intermediate frequency
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K13/00—Welding by high-frequency current heating
- B23K13/01—Welding by high-frequency current heating by induction heating
- B23K13/02—Seam welding
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- Mechanical Engineering (AREA)
- General Induction Heating (AREA)
Abstract
The invention provides a welding process for the outgoing line of an air inner-cooled turbine generator. The outgoing line comprises a connecting round pipe, and an upper connecting head and a lower connecting head connected to the two ends of the connecting round pipe in a welding manner, during welding, two sets of intermediate frequency induction heating equipment are adopted for heating at different powers, so as to enable workpieces to be heated uniformly, and manual stuffing is performed in circumferential soldering seams between the connecting round pipe and the upper connecting head and between the connecting round pipe and the lower connecting head, so as to increase a welding area. Due to the adoption of the welding process for the outgoing line of the air inner-cooled turbine generator, welding quality conforms to design requirements, defects of cracks, through welding, slag inclusion, exhaust holes and the like can be avoided, the welding intensity is relatively high, and the welding qualified rate is high.
Description
Technical field
What the present invention relates to is a kind of welding procedure of air inner-cooled turbogenerator lead-out wire, belongs to the welding technique field of generator lead-out wire.
Background technology
The lead-out wire of 350MW air inner-cooled turbogenerator comprises upper binding head, lower union joint and connecting circular tube, three part assembly weldings.Connecting circular tube is Φ 125 × 20, and material is TU1 oxygen-free copper; Upper binding head and lower union joint adopt TU1 no-oxygen copper plate to curve U-shaped, and bottom welding place has the Φ 126mm degree of depth to be the counterbore of 9mm.Preset annular silver soldering sheet is of a size of Φ 125 × 20.Generator lead-out wire is except carrying self gravitation load, and when generator operation, lead-out wire also bears strong shock loads, requires higher to the weld strength of weld.During welding, welding counterbore base temperature is not easily controlled, and preset silver soldering sheet easily occurs inequality of being heated, and causes defects such as not merging, lack of penetration, preset silver soldering sheet by solid state transformed be liquid time shrinkage factor higher, easily produce the defects such as pore.
Accordingly, the traditional-handwork welding such as oxygen-acetylene welding, argon arc welding, gas shielded arc welding should not be adopted during the welding of lead-out wire connector.Because connector counterbore base can not be carried out homogeneous heating by traditional welding, the defects such as easy appearance is not merged, lack of penetration.And when carrying out filler to brazed seam circumferencial direction, due to inequality of being heated, brazed seam there will be the phenomenon of oxidation peeling, reduces the strength of joint of welding quality and weld.As adopted vacuum drying oven soldering, cannot carry out manual filler during welding, bonding area is the molten bath area of annular silver soldering sheet, require high to the penetration rate of weld, but, due to the copper material variable thickness of upper binding head and lower union joint, heat time timely difficult control of temperature, there is thick copper material side solder fully not merge, the solder liquefaction trickling of thin copper material side, the phenomenon of corrosion workpiece, solder yield is low, percent defective is high, the weak point that Here it is existing for prior art.
Summary of the invention
The technical problem to be solved in the present invention, be exactly for the deficiency existing for prior art, and a kind of welding procedure of air inner-cooled turbogenerator lead-out wire is provided, this welding procedure has the advantages that firing rate is fast, weld defect is few, weld strength is high, solder yield is high.
This programme is achieved by the following technical measures: in the welding procedure of this air inner-cooled turbogenerator lead-out wire, described lead-out wire comprises connecting circular tube and the upper binding head that welds with connecting circular tube two ends and lower union joint, adopt two Intermediate Frequency Induction Heating Equipment different capacities to heat during welding simultaneously, and manual filler is carried out to connecting circular tube and the circumference brazed seam between upper binding head and lower union joint.
Adopt two Intermediate Frequency Induction Heating Equipment different capacities to heat during above-mentioned welding to refer to: by the induction snare of two Intermediate Frequency Induction Heating Equipment to joint close place simultaneously, use baffle interval between two induction coils, and be 49 ~ 51KW by the power setting of induction coil near connector to be welded, away from the power setting of the induction coil of connector to be welded be 32 ~ 35KW after start heating; Describedly manual filler carried out to connecting circular tube and the circumference brazed seam between upper binding head and lower union joint refer to: when observing that weld is salmon pink, use silver content be 14.5% ~ 15.5% BCu80AgP silver solder along the circumferential direction fill the joint clearance of connector and connecting circular tube.
When adopting two Intermediate Frequency Induction Heating Equipment different capacities to heat, when to be heated to weld temperature be 740 ~ 780 DEG C simultaneously, the continuous heating 20 ~ 25 minutes when room temperature 30 DEG C.
After complete cycle gap-fill, continue heating 0.5-2 minute, then close Intermediate Frequency Induction Heating Equipment.
After complete cycle gap-fill, continue heating 1 minute, then close Intermediate Frequency Induction Heating Equipment.
Aforementioned barriers adopts thickness to be the micarex of 4-6mm.
Be fixedly connected with pipe and connector with clamping tool, the connecting circular tube fixed and connector be placed on the thick asbestos board of 18-22mm.
The thickness of above-mentioned silver soldering sheet is 0.22-0.26mm, and ensures that the one-sided removal amount of silver soldering sheet is within 0.03mm.
The clamping force of above-mentioned clamping tool is between 10-15KN.
The welding procedure of this air inner-cooled turbogenerator lead-out wire specifically comprises the steps:
(1) Work inspection device;
(2) weldment cleaning;
(3) group welding piece clamping: one end of lead-out wire connecting circular tube and connector are assembled, joint fills annular silver soldering sheet, the thickness of silver soldering sheet is 0.24mm, the one-sided removal amount of silver soldering sheet is 0.03mm, by two of Intermediate Frequency Induction Heating Equipment induction snares to joint close place, the micarex interval using 5mm thick between two induction coils, and be fixedly connected with pipe and connector with clamping tool, clamping force is 12KN;
(4) weld: be 50KW by the power setting of induction coil near connector, away from the power setting of the induction coil of connector be 33KW after start heating, being heated to weld temperature is 740 ~ 780 DEG C, when room temperature 30 DEG C, the heat time is 20 ~ 25 minutes, when observing that weld is salmon pink, use silver content be 14.5% ~ 15.5% BCu80AgP silver solder along the circumferential direction fill the joint clearance of connector and connecting circular tube, after complete cycle gap-fill, continue heating 1 minute, then close Intermediate Frequency Induction Heating Equipment;
(5) other end of connecting circular tube welds with connector: after weldment cooling, pull down the induction coil of clamping tool and Intermediate Frequency Induction Heating Equipment, repeats step (2), (3), (4) operation;
(6) after welding treatment.
The beneficial effect of this programme can be learnt according to describing of such scheme, in the welding procedure of this air inner-cooled turbogenerator lead-out wire, adopt two Intermediate Frequency Induction Heating Equipment different capacities to heat during welding simultaneously, make workpiece thermally equivalent, and manual filler is carried out, to increase bonding area to connecting circular tube and the circumference brazed seam between upper binding head and lower union joint.After adopting above-mentioned technique to weld air inner-cooled turbogenerator lead-out wire, welding quality meets designing requirement, flawless, lack of penetration, slag inclusion and sentence the defects such as exhaust apertures, and weld strength is higher, and solder yield is high.As can be seen here, compared with prior art, have outstanding substantive distinguishing features and significant progress, its beneficial effect implemented also is apparent in the present invention.
Accompanying drawing explanation
Fig. 1 is the structural representation of air inner-cooled turbogenerator lead-out wire in the specific embodiment of the invention.
Fig. 2 is the main TV structure schematic diagram of connecting circular tube when welding with lower union joint.
Fig. 3 is the broken section perspective view of connecting circular tube when welding with lower union joint.
In figure, 1-upper binding head, 2-connecting circular tube, 3-lower union joint, 4-silver soldering sheet, 5-clamping tool, 6-induction coil, 7-Intermediate Frequency Induction Heating Equipment, 8-asbestos board.
Detailed description of the invention
For the technical characterstic of this programme can be clearly demonstrated, below by detailed description of the invention, and in conjunction with its accompanying drawing, this programme is set forth.
Intermediate Frequency Induction Heating Equipment: the principle utilizing electromagnetic induction, makes the workpiece being placed in induction coil produce eddy current, thus workpiece is generated heat, be heated to temperature required.
A kind of welding procedure of air inner-cooled turbogenerator lead-out wire, described lead-out wire comprises connecting circular tube 2 and the upper binding head 1 that welds with connecting circular tube 2 two ends and lower union joint 3, adopt two Intermediate Frequency Induction Heating Equipment 7 to heat with different capacity during welding simultaneously, and manual filler is carried out to connecting circular tube 2 and the circumference brazed seam between upper binding head 1 and lower union joint 3.
Wherein, adopt two Intermediate Frequency Induction Heating Equipment 7 different capacities to heat during welding to refer to: the induction coil 6 of two Intermediate Frequency Induction Heating Equipment 7 is overlapped to joint close place simultaneously, baffle interval is used between two induction coils 6, described dividing plate preferably adopts thickness to be the micarex of 4-6mm, with micarex by two induction coil 6 intervals, avoid two induction coils 6 directly to contact and cause hot-spot scaling loss induction coil 6, simultaneously, micarex is unsuitable blocked up, as blocked up, the position of then top induction coil 6 is moved, the heating-up temperature of junction can not be ensured.And be 49 ~ 51KW by the power setting of induction coil 6 near connector to be welded, away from the power setting of the induction coil 6 of connector to be welded be 32 ~ 35KW after start heating; When to be heated to weld temperature be 740 ~ 780 DEG C, the continuous heating 20 ~ 25 minutes when room temperature 30 DEG C.Be fixedly connected with pipe 2 and connector with clamping tool 5, the clamping force of clamping tool 5 is between 10-15KN.The connecting circular tube 2 fixed and connector are placed on the thick asbestos board of 18-22mm 8.
The induction coil 6 of Intermediate Frequency Induction Heating Equipment 7 is being overlapped to before joint close place, need first by drawing form assembling lead-out wire connector and connecting circular tube 2, joint fills annular silver soldering sheet 4, and the thickness of silver soldering sheet 4 is 0.22-0.26mm, and ensures that the one-sided removal amount of silver soldering sheet is within 0.03mm.
Carry out manual filler to connecting circular tube 2 and the circumference brazed seam between upper binding head 1 and lower union joint 3 to refer to: when observing that weld is salmon pink, use silver content be 14.5% ~ 15.5% BCu80AgP silver solder along the circumferential direction fill the joint clearance of connector and connecting circular tube 2.After complete cycle gap-fill, continue heating 0.5-2 minute, then close Intermediate Frequency Induction Heating Equipment 7, preferably by after complete cycle gap-fill, continue heating 1 minute, then close Intermediate Frequency Induction Heating Equipment 7.
The welding procedure of this air inner-cooled turbogenerator lead-out wire specifically comprises the steps.
(1) Work inspection device: respectively visual examination is carried out to upper binding head 1, lower union joint 3 and connecting circular tube 2, and check the seam size of upper binding head 1 and lower union joint 3 and the length dimension of connecting circular tube 2, emphasis checks that there are the defects such as flawless, pore, slag inclusion at the R place (chamfering place) of upper binding head 1 and lower union joint 3 with or without the indenture caused because of bending and connecting circular tube 2, and annular silver soldering sheet 4 surface should be smooth.
(2) weldment cleaning: respectively upper binding head 1, lower union joint 3, connecting circular tube 2 and silver soldering sheet 4 are cleared up.The greasy dirt of surface of the work is removed with alcohol or acetone.Rub cloth with the hands by 3M7740B type and polishing is carried out to workpiece welding position, guarantee that surface is without tiny burr and oxide-film.Use DPT-5 cleaning agent to clean workpiece, and use clean calico to wipe surface mass, and ensure that solder side is dry.Should note during cleaning silver soldering sheet 4: will evenly exert oneself with during the cleaning of stranding cloth, the one-sided removal amount of silver soldering sheet 4 is 0.03mm, and cleaning must remove the little burr of silver soldering sheet 4 inner lane comprehensively.
(3) group welding piece clamping: one end of lead-out wire connecting circular tube 2 and connector are assembled by drawing form, joint fills annular silver soldering sheet 4, the thickness of silver soldering sheet 4 is 0.24mm, two induction coils 6 of Intermediate Frequency Induction Heating Equipment 7 are overlapped to joint close place, the micarex interval using 5mm thick between two induction coils 6.And be fixedly connected with pipe 2 and connector with clamping tool 5, ensure clamping force 12KN.Group welding piece after clamping is placed on the thick asbestos board of 20mm 8, notes the gap uniformity that should ensure when placing connecting circular tube 2 between its outer circumference surface and connector seam.
(4) weld: welding should be selected in cleaning, dry place, and prevents the impurity such as dust from dropping down onto weld, the induction coil 6 of Intermediate Frequency Induction Heating Equipment 7 should and connecting circular tube 2 between gap uniformity.Be 50KW by the power setting of induction coil 6 near connector, away from the power setting of the induction coil 6 of connector be 33KW after start heating, being heated to weld temperature is 740 ~ 780 DEG C, when room temperature 30 DEG C, the heat time is 20 ~ 25 minutes, when observing that weld is salmon pink, use silver content be 14.5% ~ 15.5% BCu80AgP silver solder along the circumferential direction fill the joint clearance of connector and connecting circular tube 2, after complete cycle gap-fill, continue heating 1 minute, then close Intermediate Frequency Induction Heating Equipment 7.
(5) other end of connecting circular tube 2 welds with connector: after weldment cooling, pull down the induction coil 6 of clamping tool 5 and Intermediate Frequency Induction Heating Equipment 7, repeat step (2), (3), (4) operation, and after noting using clamping tool 5 to clamp group welding piece, the flatness of upper binding head 1 and lower union joint 3 should be ensured.
(6) after welding treatment: after work-piece cools, pulls down the induction coil 6 of clamping tool 5 and Intermediate Frequency Induction Heating Equipment 7, and use buffing wheel clears up molten of the solder and accumulation that may occur, uses the oxide on surface of acetone cleaning welded piece.
Can existing techniques in realizing be passed through without the technical characteristic described in the present invention, not repeat them here.The present invention is not limited in above-mentioned detailed description of the invention, the change that those of ordinary skill in the art make in essential scope of the present invention, remodeling, interpolation or replacement, also should belong to protection scope of the present invention.
Claims (10)
1. the welding procedure of an air inner-cooled turbogenerator lead-out wire, described lead-out wire comprises connecting circular tube and the upper binding head that welds with connecting circular tube two ends and lower union joint, it is characterized in that: during welding, adopt two Intermediate Frequency Induction Heating Equipment different capacities to heat simultaneously, and manual filler is carried out to connecting circular tube and the circumference brazed seam between upper binding head and lower union joint.
2. the welding procedure of air inner-cooled turbogenerator lead-out wire according to claim 1, it is characterized in that: adopt two Intermediate Frequency Induction Heating Equipment different capacities to heat during welding simultaneously and refer to: by the induction snare of two Intermediate Frequency Induction Heating Equipment to joint close place, use baffle interval between two induction coils, and be 49 ~ 51KW by the power setting of induction coil near connector to be welded, away from the power setting of the induction coil of connector to be welded be 32 ~ 35KW after start heating; Carry out manual filler to connecting circular tube and the circumference brazed seam between upper binding head and lower union joint to refer to: when observing that weld is salmon pink, use silver content be 14.5% ~ 15.5% BCu80AgP silver solder along the circumferential direction fill the joint clearance of connector and connecting circular tube.
3. the welding procedure of air inner-cooled turbogenerator lead-out wire according to claim 2, it is characterized in that: when adopting two Intermediate Frequency Induction Heating Equipment different capacities to heat simultaneously, when to be heated to weld temperature be 740 ~ 780 DEG C, the continuous heating 20 ~ 25 minutes when room temperature 30 DEG C.
4. the welding procedure of air inner-cooled turbogenerator lead-out wire according to claim 3, is characterized in that: after complete cycle gap-fill, continues heating 0.5-2 minute, then closes Intermediate Frequency Induction Heating Equipment.
5. the welding procedure of air inner-cooled turbogenerator lead-out wire according to claim 4, is characterized in that: after complete cycle gap-fill, continues heating 1 minute, then closes Intermediate Frequency Induction Heating Equipment.
6. the welding procedure of the air inner-cooled turbogenerator lead-out wire according to claim 2,3 or 4, is characterized in that: described dividing plate adopts thickness to be the micarex of 4-6mm.
7. the welding procedure of air inner-cooled turbogenerator lead-out wire according to claim 6, is characterized in that: be fixedly connected with pipe and connector with clamping tool, the connecting circular tube fixed and connector is placed on the thick asbestos board of 18-22mm.
8. the welding procedure of air inner-cooled turbogenerator lead-out wire according to claim 7, is characterized in that: the thickness of described silver soldering sheet is 0.22-0.26mm, and ensures that the one-sided removal amount of silver soldering sheet is within 0.03mm.
9. the welding procedure of air inner-cooled turbogenerator lead-out wire according to claim 8, is characterized in that: the clamping force of described clamping tool is between 10-15KN.
10. the welding procedure of air inner-cooled turbogenerator lead-out wire according to claim 1, is characterized in that: it comprises the steps:
(1) Work inspection device;
(2) weldment cleaning;
(3) group welding piece clamping: one end of lead-out wire connecting circular tube and connector are assembled, joint fills annular silver soldering sheet, the thickness of silver soldering sheet is 0.24mm, the one-sided removal amount of silver soldering sheet is 0.03mm, by two of Intermediate Frequency Induction Heating Equipment induction snares to joint close place, the micarex interval using 5mm thick between two induction coils, and be fixedly connected with pipe and connector with clamping tool, clamping force is 12KN;
(4) weld: be 50KW by the power setting of induction coil near connector, away from the power setting of the induction coil of connector be 33KW after start heating, being heated to weld temperature is 740 ~ 780 DEG C, when room temperature 30 DEG C, the heat time is 20 ~ 25 minutes, when observing that weld is salmon pink, use silver content be 14.5% ~ 15.5% BCu80AgP silver solder along the circumferential direction fill the joint clearance of connector and connecting circular tube, after complete cycle gap-fill, continue heating 1 minute, then close Intermediate Frequency Induction Heating Equipment;
(5) other end of connecting circular tube welds with connector: after weldment cooling, pull down the induction coil of clamping tool and Intermediate Frequency Induction Heating Equipment, repeats step (2), (3), (4) operation;
(6) after welding treatment.
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| CN201610007512.XA CN105478989B (en) | 2016-01-07 | 2016-01-07 | A kind of welding procedure of air inner-cooled turbogenerator lead-out wire |
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| CN201610007512.XA CN105478989B (en) | 2016-01-07 | 2016-01-07 | A kind of welding procedure of air inner-cooled turbogenerator lead-out wire |
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| CN105478989B CN105478989B (en) | 2018-01-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106271466A (en) * | 2016-10-09 | 2017-01-04 | 哈尔滨电机厂有限责任公司 | Nuclear power half speed steam turbine generator outlet terminal welding method |
| CN108544112A (en) * | 2018-04-19 | 2018-09-18 | 江苏江南电机有限公司 | A kind of high-power starter stator coil extraction soft whipping wire Joining Technology |
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| CN105478989B (en) | 2018-01-26 |
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Effective date of registration: 20210121 Address after: 250012 Qilu motor building, No.18 Huaxin Road, Lixia District, Jinan City, Shandong Province Patentee after: SHANDONG QILU ELECTRIC MOTOR MANUFACTURING Co.,Ltd. Address before: No.18, Huaxin Road, Lixia District, Jinan City, Shandong Province, 250012 Patentee before: SHANDONG QILU ELECTRIC MOTOR MANUFACTURING Co.,Ltd. Patentee before: SHANDONG JINAN POWER EQUIPMENT FACTORY Co.,Ltd. |