CN113427158B

CN113427158B - Rotor brazing process

Info

Publication number: CN113427158B
Application number: CN202110706846.7A
Authority: CN
Inventors: 闫虎; 李定远; 龚宝锋
Original assignee: Xi'an Alstom Yongji Electric Equipment Co ltd
Current assignee: Xi'an Alstom Yongji Electric Equipment Co ltd
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2022-10-28
Anticipated expiration: 2041-06-24
Also published as: CN113427158A

Abstract

The application relates to a rotor brazing process, which belongs to the field of rotor preparation processes and comprises the steps of conducting bar primary fixation, conducting bar adjustment and detection; fixing the guide bars after the detection is qualified; then, the rotor fixed with the conducting bars is turned for 180 degrees and then transferred to a second fixing frame, and the end faces of the conducting bars far away from the second fixing frame are polished; coating a welding flux on the polished part of the conducting bar; and (5) welding and cooling. The rotor has the effect that the conducting bar is not easy to drop in the process of rotor transfer and brazing.

Description

Rotor brazing process

Technical Field

The application relates to the field of rotor preparation processes, in particular to a rotor brazing process.

Background

The motor includes a rotor and a stator, the motor is a device for converting electric energy and mechanical energy and electric energy, and the motor is divided into various types, wherein the alternating current motor is widely used due to advantages of simple structure, easy maintenance and the like. Referring to fig. 1 and 2, a rotor 1 of an ac motor generally includes a core 11 of the rotor 1, a conducting bar 12 and a rotating shaft 13, the core 11 is integrally cylindrical, the rotating shaft 13 is coaxial with the core 11 and located inside the core 11, the rotating shaft 13 is rotatably connected to the core 11 through a bearing, and the conducting bar 12 is provided with a plurality of conducting bars and is distributed at intervals along a circumferential direction of the core 11. Punching press lamination 14 is fixedly connected to the periphery wall of iron core 11, and conducting bar 12 is located between iron core 11 and punching press lamination 14, and the inner wall of punching press lamination 14 and the outer wall butt of conducting bar 12. The iron core 13 at one end of the rotor 1 is fixedly connected with an end plate 15, and the end plate 15 is sleeved outside the rotating shaft 13 at one end of the rotor 1 and is fixedly connected with the rotating shaft 13.

In order to avoid the electromagnetic induction phenomenon generated by the conducting bars in the inner area of the iron core to cause the whole inner part of the rotor to generate heat, short circuit plates are required to be welded at the two ends of the conducting bars in the length direction, and the short circuit plates can effectively block the disordered electromagnetic induction phenomenon in the iron core, so that the assembled motor can better play a role. At present, an operator can transfer the rotor to welding equipment to perform a subsequent welding process, but in the process of transferring the rotor, the conducting bars are extremely easy to drop.

In view of the above-mentioned related art, the inventor believes that the bars are easily dropped from the rotor during the process of transferring the rotor to the welding apparatus, so that the operator needs to repeatedly insert the bars into the core, resulting in a cumbersome operation.

Disclosure of Invention

In order to prevent the guide bars from falling off easily during the transfer of the rotor, the application provides a rotor brazing process.

The application provides a rotor brazing process, adopts following technical scheme:

primarily fixing a guide bar: fixing a conducting bar at one end of the rotor;

adjusting the guide bars: transferring the rotor with the guide bar primarily fixed onto a first fixing frame, and enabling the other end of the guide bar to be flush and attached to the top wall of the first fixing frame after the guide bar is released from being fixed;

and (3) detection: detecting the distance between the adjusted guide strip and the top wall of the first fixing frame;

fixing the guide strip again: after the detection is qualified, reinforcing the conducting bars far away from the first fixing frame;

polishing the conducting bars: the rotor which is fixed again is turned for 180 degrees and then transferred to a second fixing frame, and the end face of the conducting bar far away from the second fixing frame is polished;

coating a welding flux: the rotor after the conducting bar that will polish overturns 180 backs again unsettled, paints the solder flux in the department of polishing of conducting bar:

and (3) rotor welding: brazing the rotor coated with the flux and the short circuit board;

and (3) cooling: and cooling the welded rotor.

By adopting the technical scheme, the conducting bars are firstly preliminarily fixed in the process that the rotor is transferred to the first fixing frame, so that the conducting bars are not easy to drop in the process of transferring the rotor, and the possibility that operators frequently pick up the conducting bars and insert the conducting bars into the rotor is reduced; place the rotor on first mount, help fixing a position the conducting bar in the rotor, the position adjustment of conducting bar is to the conducting bar and be close to the one end of first mount roof and be located same horizontal plane, and detect the distance between every conducting bar and the first mount roof through the test piece, it fixes once more to detect the conducting bar that will keep away from first mount one end after qualified, make the conducting bar be difficult for the displacement of regenerating, help making the conducting bar be difficult for dropping in transfer and welding process, convenient rotor welding process.

The guide bar is turned 180 degrees and then transferred to the second fixing frame, the end face of the guide bar far away from the second fixing frame is polished through a polishing tool, the polishing position of the guide bar is coated with a welding flux, finally, a rotor coated with the welding flux is placed on welding equipment to be welded, and the welding is finished and then cooled.

When the rotor and the short circuit board are welded, the temperature of the position between the rotor and the short circuit board where the flux is smeared is only required to be higher, the whole rotor does not need to be heated, the rotor is protected, and the possibility of danger caused by the high temperature of the whole rotor is reduced.

Optionally, the guide bar is fixed by using a fixing assembly in the preliminary fixing step, the fixing assembly comprises a connecting ring and connecting pieces, the connecting ring is sleeved on the outer wall of the guide bar and is attached to the outer wall of the guide bar, the connecting pieces comprise two connecting buckles, two connecting bolts and two nuts, the two connecting buckles are symmetrically arranged at the ports at the two ends of the connecting ring, the connecting buckles are fixedly connected with the ports of the connecting ring, the connecting bolts are located in the two connecting buckles and are in threaded connection with the nuts, and the nuts are used for fixing the connecting bolts.

Through adopting above-mentioned technical scheme, establish the go-between cover on all conducting bars of rotor length direction one end, make the outer wall of conducting bar and the laminating of the interior perisporium of go-between, then screw up the nut, make the conducting bar fixed by the go-between, make the conducting bar difficult for dropping at the in-process that the rotor was shifted.

Optionally, one side that the connector link kept away from each other is connected with the reinforcement subassembly, and the reinforcement subassembly includes first slip ring, connecting strip and second slip ring, and first slip ring overlaps with connecting strip length direction's one end fixed connection and establishes the periphery wall at the go-between, and the periphery wall at the go-between other end is established with the other end fixed connection and the cover of connecting strip length direction to the second slip ring, first slip ring and second slip ring all with go-between sliding connection.

Through adopting above-mentioned technical scheme, consolidate the subassembly and play the reinforced effect of port to the go-between, still can make the port non-deformable of go-between on the basis that does not influence connecting bolt to go-between locking, and then can make the difficult drop of conducting bar of go-between inside.

Optionally, first mount in the gib adjustment step includes landing leg, workstation and limiting plate, the landing leg be located the below of workstation and with workstation fixed connection, the fixed orifices that makes the pivot pass through is seted up to the roof of workstation, the top of workstation is connected with the limiting plate, the limiting plate be with the coaxial cyclic annular board of fixed orifices, the internal perisporium fixedly connected with annular board of limiting plate, the height that highly is greater than the limiting plate of annular board.

By adopting the technical scheme, the rotor is transferred onto the workbench, so that the rotating shaft at one end of the rotor, which is far away from the connecting ring, penetrates through the fixing hole and is positioned below the workbench until the outer wall of the iron core of the rotor is attached to the top wall of the limiting plate; then the nut is unscrewed, at this moment, the conducting bar moves to the direction close to the limiting plate by means of self gravity until the conducting bar is close to one end parallel and level of the workbench and is attached to the top wall of the limiting plate.

Optionally, the limiting plate is detachably connected with the workbench.

By adopting the technical scheme, the limiting plate is taken, placed and replaced by the operator, and the use convenience of the operator is improved.

Optionally, a reinforcing ring is adopted in the guide bar re-fixing step, and a fixing connection assembly for self-positioning and a reinforcing member for fixing the guide bar are arranged on the top wall of the reinforcing ring.

Through adopting above-mentioned technical scheme, the pivot that the workstation was kept away from to the rotor passes the reinforcement ring, carries on spacingly to the reinforcement ring through fixed connection subassembly, and is fixed with the conducting bar through the reinforcement, accomplishes the process of fixing again to the conducting bar.

Optionally, in the step of coating the flux, a waste bucket for collecting waste flux is placed below the rotor.

Through adopting above-mentioned technical scheme, the waste material bucket can be collected the welding flux waste material to carry out follow-up centralized processing, make the difficult polluted environment of welding flux waste material.

Optionally, the cooling step is performed by using a cooling platform, a placing groove is formed in a top wall of the cooling platform, a through hole for allowing the rotating shaft and the end plate to pass through is formed in a bottom wall of the placing groove, the through hole is coaxial with the placing groove, the diameter of the through hole is smaller than that of the placing groove, the height of the placing groove is larger than the thickness of the short-circuit plate, and the short-circuit plate is located in the placing groove.

Through adopting above-mentioned technical scheme, place welded rotor in the standing groove, the diapire of short circuit board and the diapire laminating of standing groove this moment, the standing groove can play the effect of sheltering from to the rotor, reduces the possibility that operating personnel is scalded by the short circuit board of scorching heat.

To sum up, the application comprises the following beneficial technical effects:

1. the guide bar is firmly fixed in the rotor by four steps of initial fixing of the guide bar, adjustment of the guide bar, detection and re-fixing of the guide bar before the rotor is welded, so that the rotor is not easy to drop in the transferring and welding processes, and the possibility of frequently picking up the guide bar and inserting the guide bar into the rotor by an operator is reduced;

2. the guide bar is preliminarily fixed by the fixing assembly, so that the guide bar fixing mode is simple, convenient and fast, easy to manufacture, low in manufacturing cost and beneficial to popularization and use;

3. by adopting the reinforcing ring, the conducting bar can be further fixed, and the conducting bar is not easy to fall off in the process of transferring or welding the rotor;

4. the guide bars and the short circuit plates are welded in a brazing mode, so that the temperature of the position between the rotor and the short circuit plates where the welding flux is smeared is higher without heating the whole rotor, the rotor is protected, and the possibility of danger caused by the high temperature of the whole rotor is reduced.

Drawings

Fig. 1 is a schematic perspective view of a rotor in the background art of the present application;

FIG. 2 is a schematic perspective view of another perspective view of a rotor in the background of the present application;

FIG. 3 is a schematic perspective view of a rotor with a lead initially secured in a brazing process for a rotor according to an embodiment of the present disclosure;

FIG. 4 is a perspective view of a highlighting fixture assembly in an embodiment of the present application;

FIG. 5 is a diagram illustrating the operation of the adjustment of the conducting bars in a rotor brazing process according to an embodiment of the present disclosure;

FIG. 6 is a schematic perspective view illustrating a first fixing frame in an embodiment of the present disclosure;

FIG. 7 is a schematic perspective view of an embodiment of the present application showing a reinforcing ring;

FIG. 8 is a view illustrating an operation of grinding bars in a rotor brazing process according to an embodiment of the present invention;

FIG. 9 is a diagram illustrating the operation of flux application in a rotor brazing process according to an embodiment of the present disclosure;

FIG. 10 is a schematic view of a rotor post-weld cooling operation in a rotor brazing process according to an embodiment of the present application;

FIG. 11 is a cross-sectional view of the cooling stage highlighted in an embodiment of the present application.

Description of the reference numerals: 1. a rotor; 11. an iron core; 12. conducting bars; 13. a rotating shaft; 131. hanging crane

A ring; 14. stamping the lamination; 15. an end plate; 2. a fixing component; 21. a connecting ring; 22. a connecting member; 221. a connecting buckle; 222. a connecting bolt; 223. a nut; 23. a reinforcement assembly; 231. a first slip ring; 232. a connecting strip; 233. a second slip ring; 3. a first fixing frame; 31. a support leg; 32. a work table; 321. a fixing hole; 33. a limiting plate; 34. an annular plate; 35. placing the plate; 4. a reinforcing ring; 41. reinforcing the bolt; 42. fixing the connecting assembly; 421. tightening the bolt; 422. a gasket; 5. a second fixing frame; 6. a waste bin; 7. a cooling table; 71. a placement groove; 72. a through hole; 8. a short circuit board.

Detailed Description

The present application is described in further detail below with reference to figures 3-11.

The embodiment of the application discloses a rotor brazing process. The rotor brazing process comprises the following steps:

the conducting bar 12 is initially fixed: referring to fig. 3 and 4, the end portion of the rotating shaft 13, to which the end plate 15 is not connected, of the rotor 1 is fixedly connected with the hanging ring 131 through a bolt, one end of the conducting bar 12 close to the hanging ring 131 is fixed, the fixing assembly 2 is adopted during fixing, the fixing assembly 2 includes a connecting ring 21 and a connecting piece 22, the connecting ring 21 is coaxial with the rotating shaft 13, the connecting piece 22 includes two connecting buckles 221, connecting bolts 222 and nuts 223, the two connecting buckles 221 are symmetrically arranged at two end ports of the connecting ring 21, the connecting buckles 221 are integrally connected with the end ports of the connecting ring 21, the connecting bolts 222 sequentially penetrate through the two connecting buckles 221, the nuts 223 are sleeved on the outer wall of the connecting bolts 222 and are in threaded connection with the connecting bolts 222, the connecting buckles 221 are circular rings with inner diameters smaller than the outer diameters of the nuts 223, in this embodiment, the connecting ring 21 is a stainless steel wire. The connecting ring 21 is sleeved on the outer walls of all the conducting bars 12 at one end of the rotor 1 in the length direction, so that the outer walls of the conducting bars 12 are attached to the inner peripheral wall of the connecting ring 21, and then the screw cap 223 is screwed down, so that the conducting bars 12 are fixed by the connecting ring 21.

As shown in fig. 4, in order to stabilize the port of the connection ring 21, a reinforcing member 23 is connected to a side of the connection buckle 221 away from each other, the reinforcing member 23 includes a first sliding ring 231, a connection strip 232 and a second sliding ring 233, the first sliding ring 231 is integrally connected to one end of the connection strip 232 in the length direction and is sleeved on the outer circumferential wall of the connection ring 21, the second sliding ring 233 is integrally connected to the other end of the connection strip 232 in the length direction and is sleeved on the outer circumferential wall of the other end of the connection ring 21, the first sliding ring 231 and the second sliding ring 233 are both slidably connected to the connection ring 21, and the first sliding ring 231, the connection strip 232 and the second sliding ring 233 are all made of iron sheets. The reinforcing component 23 has a port reinforcing effect on the connection ring 21, so that the port of the connection ring 21 is not easy to deform on the basis that the locking of the connection bolt 222 on the connection ring 21 is not influenced, and further the conducting bar 12 in the connection ring 21 is not easy to fall off.

And (3) adjusting the conducting bar 12: as shown in fig. 5, the rotor 1 after the initial fixing of the conducting bar 12 is transferred to the first fixing frame 3, the first fixing frame 3 includes supporting legs 31 and a workbench 32, the workbench 32 is a circular plate, the supporting legs 31 are vertically arranged and located below the workbench 32, the supporting legs 31 are provided with four supporting legs and circumferentially distributed along the workbench 32, and the top wall of the supporting legs 31 is welded to the bottom wall of the workbench 32. Referring to fig. 6 again, the vertical fixed orifices 321 that runs through workstation 32 thickness of seting up of top wall of workstation 32, limiting plate 33 has been placed to workstation 32's top, limiting plate 33 is the cyclic annular board coaxial with fixed orifices 321, limiting plate 33's internal perisporium body coupling has annular slab 34, annular slab 34's the periphery wall is laminated with limiting plate 33's internal perisporium, annular slab 34's diapire and limiting plate 33's diapire parallel and level, annular slab 34 highly is greater than limiting plate 33's height, annular slab 34's outer wall and limiting plate 33's inner wall body coupling, limiting plate 33 directly places the diapire that runs through workstation 32 and limiting plate 33 and workstation 32's top wall laminating.

When in use, as shown in fig. 3 and 5, the limit plate 33 is directly placed on the workbench 32, the rotor 1 is transferred onto the workbench 32 through the winch, and the rotating shaft 13 and the end plate 15 at one end of the rotor 1, which are far away from the connecting ring 21, both pass through the fixing hole 321 and are positioned below the workbench 32 until the bottom wall of the iron core 11 of the rotor 1 is attached to the top wall of the annular plate 34; then, the nut 223 is loosened, and at this time, the bar 12 moves toward the direction close to the stopper plate 33 by its own weight until one end of the bar 12 close to the table 32 is flush with the top wall of the stopper plate 33.

In addition, as shown in fig. 6, a placing plate 35 is welded between the legs 31 for facilitating the operator to take and place the tool. The operating personnel can place the instrument and place board 35 top, can make things convenient for operating personnel to get nearby and put the instrument, shortens operating personnel and gets the time of putting the instrument, helps improving operating personnel's work efficiency.

And (3) detection: after the conducting bars 12 in the rotor 1 are attached to the top wall of the limiting plate 33, 0.2-wire feelers are sequentially inserted into gaps between the top wall of the limiting plate 33 and the conducting bars 12 to be detected, if the feelers are just plugged in but not loosened and tightened, the fact that the distance between the conducting bars 12 and the top wall of the limiting plate 33 is proper is shown, and the detection is qualified; if the detection is unqualified, knocking the end part, away from the limiting plate 33, of the guide bar 12 which is unqualified in detection by other knocking tools such as a small hammer and the like until the distance is qualified after being measured again;

and fixing the conducting bar 12: as shown in fig. 5, when all the conducting bars 12 are qualified, the conducting bars 12 far away from the first fixing frame 3 are reinforced in a manner that a reinforcing ring 4 is arranged at an end cover of the rotor 1 far away from the workbench 32, and as shown in fig. 7, a fixing member is arranged on the top wall of the reinforcing ring 4, the fixing member is a reinforcing bolt 41, the reinforcing bolts 41 are provided with a plurality of reinforcing bolts and are distributed at intervals along the circumferential direction of the reinforcing ring 4, the number of the reinforcing bolts 41 corresponds to the number of the conducting bars 12 in the rotor 1, and the reinforcing bolts 41 are in threaded connection with the reinforcing ring 4 and can pass through the reinforcing ring 4 and then abut against the top wall of the conducting bars 12; the roof of reinforcing ring 4 is equipped with fixed connection subassembly 42, and fixed connection subassembly 42 is including holding bolt 421 and gasket 422, and holding bolt 421 passes connecting hole threaded connection in the iron core 11 of gasket 422 and reinforcing ring 4 back in proper order, holds bolt 421 and the vertical sliding connection of gasket 422 and with iron core 11 threaded connection.

When the rotor is used, the rotating shaft 13 of the rotor 1 far away from the workbench 32 penetrates through the reinforcing ring 4, the fastening bolt 421 is screwed to limit the reinforcing ring 4, the reinforcing bolt 41 is screwed to enable the reinforcing bolt 41 to be abutted against the top wall of the conducting bar 12, then the nut 223 is screwed, the connecting ring 21 is enabled to fix the conducting bar 12 again, and the process of re-fixing the conducting bar 12 is completed; finally, the lamination 14 is slightly pried by a tool such as a screwdriver, so that the conducting bar 12 is less prone to displacement.

In addition, it should be mentioned that, because the first fixing frame 3 and the second fixing frame 5 have the same structure, and the limiting plate 33 is detachably connected to the first fixing frame 3, the first fixing frame 3 and the second fixing frame 5 can be used together, which is helpful to improve the applicability of the first fixing frame 3 and the second fixing frame 5.

And (3) grinding the guide bar 12: referring to fig. 6 and 8, the rotor 1 with the guide bars 12 fixed again is turned by 180 ° by a winch and then transferred to the second fixing frame 5, the end face of the guide bar 12 far away from the second fixing frame 5 is polished, and the structure of the second fixing frame 5 is the same as that of the first fixing frame 3. And (3) extending the rotating shaft 13 at one end of the rotor 1 close to the connecting ring 21 into a fixing hole 321 on the workbench 32 in the second fixing frame 5, and polishing one end of the conducting bar 12 far away from the connecting ring 21 by a steel wire brush.

Coating a welding flux: as shown in fig. 9, rotor 1 after will polishing conducting bar 12 overturns 180 again and adopts the hoist engine to hang in the air, then takes the brush to paint the solder flux in the department of conducting bar 12 polishing, the below of rotor 1 is provided with waste bucket 6, waste bucket 6 is the cask,

waste bucket

6 and 13 coaxial, waste bucket 6 level place subaerial of pivot, waste bucket 6 can collect the solder flux waste material to carry out subsequent centralized processing, make the difficult polluted environment of solder flux waste material.

Brazing of the rotor 1: the rotor 1 coated with the flux is transferred to an induction coil of a copper welding machine, and the short-circuit board 8 is placed at a corresponding position for welding (the step belongs to the prior art, and is not described herein again). The brazing machine only needs to heat the flux between the rotor 1 and the short circuit plate 8 without heating the whole rotor 1, which is helpful for protecting the rotor 1 and reducing the possibility of danger caused by high temperature of the whole rotor 1.

And (3) cooling: as shown in fig. 10 and 11, the welded rotor 1 is placed in a cooling stage 7 for cooling, the cooling stage 7 is a rectangular prism table, a placement groove 71 is formed in the top wall of the cooling stage 7, a through hole 72 for allowing the rotation shaft 13 and the end plate 15 to pass through is formed in the bottom wall of the placement groove 71, the through hole 72 is coaxial with the placement groove 71, the diameter of the through hole 72 is smaller than that of the placement groove 71, the height of the placement groove 71 is larger than the thickness of the short-circuit plate 8, the short-circuit plate 8 is positioned in the placement groove 71, and the bottom wall of the short-circuit plate 8 is attached to the bottom wall of the placement groove 71. The welded rotor 1 is placed in the placing groove 71, the short-circuit plate 8 is located in the placing groove 71 at the moment, the placing groove 71 can shield the rotor 1, and the possibility that an operator is scalded by the hot short-circuit plate 8 is reduced.

After the rotor 1 is cooled, the reinforcing ring 4 and the fixing assembly 2 are taken off from the rotor 1, the other end part of the conducting bar 12 is polished by adopting the related steps, and the end part of the newly polished conducting bar 12 is coated with the welding flux, so that the copper welding process of the other end of the conducting bar 12 in the length direction and the other short circuit board 8 is completed.

The implementation principle of the rotor brazing process in the embodiment of the application is as follows: (1) Sleeving the connecting ring 21 outside the conducting bar 12 at one end of the rotor 1, then sequentially penetrating the connecting bolts 222 through the two connecting buckles 221 and then screwing the screw caps 223 to finish the primary fixing step of the conducting bar 12; (2) The rotor 1 is transferred to the upper part of the first fixing frame 3, the screw cap 223 is unscrewed, the conducting bar 12 moves towards the direction close to the limiting plate 33 by the self gravity until one end of the conducting bar 12 close to the workbench 32 is flush and attached to the top wall of the limiting plate 33, and the conducting bar 12 adjusting step is completed; (3) Sequentially inserting a 0.2-wire feeler gauge into a gap between the top wall of the limit plate 33 and the guide bar 12 to be detected, properly detecting the distance between the guide bar 12 and the top wall of the limit plate 33, and if the detection is unqualified, knocking the end part of one end, far away from the limit plate 33, of the guide bar 12 which is unqualified in detection by other knocking tools such as a small hammer until the distance is qualified after the secondary measurement, and completing the detection step; (4) When all the conducting bars 12 are detected to be qualified, the rotating shaft 13 of the rotor 1, which is far away from the workbench 32, penetrates through the reinforcing ring 4, the fastening bolt 421 is screwed to limit the reinforcing ring 4, the fastening bolt 41 is screwed to enable the fastening bolt 41 to be abutted against the top wall of the conducting bar 12, then the nut 223 is screwed, the connecting ring 21 is enabled to fix the conducting bar 12 again, and the re-fixing step of the conducting bar 12 is completed; (5) Turning the rotor 1 with the guide bars 12 fixed again by 180 degrees, transferring the rotor onto a second fixing frame 5, and polishing the end faces of the guide bars 12 far away from the second fixing frame 5; (6) Turning the rotor 1 with the guide bars 12 polished again for 180 degrees, suspending the rotor by using a winch, and then coating a welding flux on the polished positions of the guide bars 12 by using a brush; (7) Transferring the rotor 1 coated with the flux into an induction coil of a brazing machine, and placing a short-circuit plate 8 at a corresponding position for brazing; (8) Placing the welded rotor 1 on the placing groove 71 of the cooling table 7 for cooling; after the heated portion of the rotor is cooled to room temperature, the reinforcing ring 4 and the fixing member 2 are removed, and the steps (5) - (8) are repeated to braze the other end of the conductive bar 12 to another short circuit plate 8.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A rotor brazing process, characterized by: comprises the following steps of (a) carrying out,

s1, initially fixing a guide bar (12): fixing a conducting bar (12) at one end of a rotor (1) by adopting a fixing component (2);

the fixing assembly (2) comprises a connecting ring (21) and a connecting piece (22), the connecting ring (21) is sleeved on the outer wall of the guide bar (12) and attached to the outer wall of the guide bar (12), the connecting piece (22) comprises two connecting buckles (221), connecting bolts (222) and screw caps (223), the two connecting buckles (221) are symmetrically arranged at ports at two ends of the connecting ring (21), the connecting buckles (221) are fixedly connected with ports of the connecting ring (21), the connecting bolts (222) are located in the two connecting buckles (221) and are in threaded connection with the screw caps (223), and the screw caps (223) are used for fixing the connecting bolts (222); one side, far away from each other, of each connecting buckle (221) is connected with a reinforcing assembly (23), each reinforcing assembly (23) comprises a first sliding ring (231), a connecting strip (232) and a second sliding ring (233), the first sliding ring (231) is fixedly connected with one end, in the length direction, of each connecting strip (232) and is sleeved on the outer peripheral wall of the connecting ring (21), the second sliding ring (233) is fixedly connected with the other end, in the length direction, of each connecting strip (232) and is sleeved on the outer peripheral wall of the other end of the connecting ring (21), and the first sliding ring (231) and the second sliding ring (233) are both in sliding connection with the connecting ring (21);

s2, adjusting the guide bars (12): arranging a first fixing frame (3), transferring the rotor (1) after the guide bar (12) is initially fixed onto the first fixing frame (3), unscrewing a screw cap (223), and enabling the other end of the guide bar (12) to be flush and attached to the top wall of the first fixing frame (3) after the guide bar (12) is released from being fixed;

the first fixing frame (3) in the guide bar (12) adjusting step comprises supporting legs (31) and a workbench (32), the supporting legs (31) are located below the workbench (32) and fixedly connected with the workbench (32), a fixing hole (321) allowing the rotating shaft (13) to pass through is formed in the top wall of the workbench (32), a limiting plate (33) is connected above the workbench (32), the limiting plate (33) is an annular plate coaxial with the fixing hole (321), the inner peripheral wall of the limiting plate (33) is fixedly connected with the annular plate (34), and the height of the annular plate (34) is larger than that of the limiting plate (33);

s3, detection: detecting the distance between the adjusted guide strip (12) and the top wall of the first fixing frame (3);

s4, fixing the guide bar (12): after the detection is qualified, the screw cap (223) is screwed, a reinforcing ring (4) is arranged at one end of the guide bar (12) far away from the first fixing frame (3), and one end of the guide bar (12) far away from the first fixing frame (3) is reinforced;

the top wall of the reinforcing ring (4) is provided with a fixed connecting assembly (42) for self-positioning and a reinforcing member for fixing the guide bars (12), the reinforcing member is a plurality of reinforcing bolts (41), the reinforcing bolts (41) correspond to the guide bars (12) in the rotor (1) one by one, and the reinforcing bolts (41) are connected with the reinforcing ring (4) through threads and are abutted against the top wall of the guide bars (12); the fixed connecting assembly (42) comprises a fastening bolt (421), and the fastening bolt (421) penetrates through the reinforcing ring (4) and then is in threaded connection with the iron core (11) of the rotor (1);

s5, grinding the guide bar (12): arranging a second fixing frame (5), turning the rotor (1) which is fixed again for 180 degrees, transferring the rotor to the second fixing frame (5), and polishing the end face of the guide bar (12) which is far away from the second fixing frame (5);

s6, coating a welding flux: turning the rotor (1) polished with the conducting bar (12) for 180 degrees again, suspending in the air, and coating a welding flux on the polished part of the conducting bar (12);

s7, welding the rotor (1): brazing the rotor (1) coated with the flux and the short circuit plate (8);

s8, cooling: cooling the welded rotor (1);

s9, after the rotor (1) is cooled, the reinforcing ring (4) and the fixing component (2) are taken down from the rotor (1), the end part of the other end of the guide bar (12) is polished by adopting the steps S5-S8, welding flux is coated on the end part of the newly polished guide bar (12), and the copper welding of the other end of the guide bar (12) in the length direction and the other short circuit plate (8) is completed.

2. A rotor brazing process according to claim 1, wherein: the limiting plate (33) is detachably connected with the workbench (32).

3. A rotor brazing process according to claim 1, wherein: in the step of coating the welding flux, a waste material barrel (6) used for collecting waste welding flux is placed below the rotor (1).

4. A rotor brazing process according to claim 1, wherein: in the cooling step, a cooling table (7) is used for cooling, a placing groove (71) is formed in the top wall of the cooling table (7), a through hole (72) for enabling the rotating shaft (13) and the end plate (15) to pass through is formed in the bottom wall of the placing groove (71), the through hole (72) is coaxial with the placing groove (71), the diameter of the through hole (72) is smaller than that of the placing groove (71), the height of the placing groove (71) is larger than the thickness of the short-circuit plate (8), and the short-circuit plate (8) is located in the placing groove (71).