CN113794339B - Method for forming integrated assembly with rotating shaft and rotor disc - Google Patents
Method for forming integrated assembly with rotating shaft and rotor disc Download PDFInfo
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- CN113794339B CN113794339B CN202111098033.0A CN202111098033A CN113794339B CN 113794339 B CN113794339 B CN 113794339B CN 202111098033 A CN202111098033 A CN 202111098033A CN 113794339 B CN113794339 B CN 113794339B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
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Abstract
The invention provides a molding method of an integrated assembly with a rotating shaft and a rotor disc, which comprises the following steps: (a) providing a rotor disc and a rotating shaft which are roughly machined and formed, wherein the rotor disc is provided with two disc end surfaces and a round hole penetrating through the two disc end surfaces, and the rotating shaft comprises a shaft body and a shaft step which are connected; (b) fixing the shaft step in the circular hole in a welding manner, so that an integrated assembly with the rotating shaft and the rotor disc is formed; (c) and simultaneously carrying out finish machining on the rotating shaft and the rotor disc of the integrated assembly so as to form a bearing step position on the shaft body and form a magnetic steel groove on the end face of the disc on the same side as the shaft body. Effectively reduced the processing and the assembly degree of difficulty to promote shaping efficiency simultaneously. In addition, only need to integral type subassembly finish machining bearing step position with the magnetic steel groove can, not only reduce the processing volume, reduce cost still effectively guarantees the precision, does benefit to batch production.
Description
Technical Field
The invention relates to the field of disk motors, in particular to a method for forming an integrated assembly with a rotating shaft and a rotor disk.
Background
The disc motor has the characteristics of small volume, light weight, short axial size, high power density and the like, can be used in most thin installation occasions, and is widely used. The disc motor generally includes at least one rotor, at least one stator, a rotating shaft, and at least one bearing, where the rotor includes a rotor disc and magnetic steel mounted on the rotor disc, the stator includes a stator disc, the rotor disc is sleeved and fixed on the rotating shaft as a power output shaft of the motor, and the stator disc is sleeved on the rotating shaft through the bearing, so that the rotor disc is parallel to the stator disc, and a small air gap is maintained between the rotor disc and the stator disc.
The parallelism between the rotor disc and the stator disc is currently ensured by controlling the perpendicularity between the rotor disc and the rotating shaft and the perpendicularity between the stator disc and the rotating shaft. Taking the rotor disc and the rotating shaft as an example, the assembling method of the rotor disc and the rotating shaft is specifically described as follows:
the method comprises the steps of firstly, determining a connection mode of the rotor disc and the rotating shaft, and processing the rotor disc and the rotating shaft according to the connection mode so as to form a connection structure suitable for the connection mode on the rotor disc and the rotating shaft. Wherein the connection means comprises an interference fit or a limit fit.
And secondly, by means of an auxiliary assembly tool, the rotor disc is sleeved on the rotating shaft by using the connecting structure so as to ensure the verticality of the rotor disc and the rotating shaft.
In the first step, the rotor disc and the rotating shaft are independently processed, and the processing precision of the connecting structure on the rotor disc and the rotating shaft is required to be guaranteed.
Disclosure of Invention
In order to solve the above problems, the present invention provides a method for forming an integrated assembly having a rotor shaft and a rotor disk, which is simple in process and reduces the difficulty in precision control, and facilitates industrial mass production.
The invention provides a molding method of an integrated assembly with a rotating shaft and a rotor disc, which comprises the following steps:
(a) providing a rotor disc and a rotating shaft which are subjected to rough machining forming, wherein the rotor disc is provided with two disc end faces and a circular hole penetrating through the two disc end faces, and the rotating shaft comprises a shaft body and a shaft step which are connected;
(b) fixing the shaft step in the circular hole in a welding manner, so that an integrated assembly with the rotating shaft and the rotor disc is formed;
(c) and simultaneously carrying out finish machining on the rotating shaft and the rotor disc of the integrated assembly so as to form a bearing step position on the shaft body and form a magnetic steel groove on the end face of the disc on the same side as the shaft body.
As a preferred technical solution, the step (b) comprises the steps of:
(b1) the shaft step is in interference fit in the round hole, and at least one welding area is formed between the shaft step and the round hole;
(b2) and filling the welding area by the welding mode to weld and fix the shaft step and the round hole.
Preferably, the circular hole has a hole side surface extending to connect the two disk end surfaces, the shaft step has a two-step end surface, and a step side surface extending to connect the two step end surfaces, and the step (b1) includes the steps of:
the step side is press-fitted to the hole side, and the welding area exposed to the disc end surface is formed between the step side and the hole side.
Preferably, a disk chamfer is formed between the hole side surface and the disk end surface, a step chamfer is formed between the step end surface and the step side surface, and a welding region is formed between the disk chamfer and the step chamfer.
As a preferred technical solution, the step (a) comprises the steps of:
(a1) roughly machining a disk blank to form the rotor disk with a roughly machined structure, wherein the roughly machined structure comprises a convex part formed on one disk end face, a concave part formed on the other disk end face and opposite to the convex part, and a circular hole penetrating through the convex part and the concave part;
(a2) the shaft blank is rough machined to form a shaft having a shaft body and a shaft step.
As a preferred technical solution, the step (c) comprises the steps of:
and machining the bearing step and the magnetic steel groove by using the shaft body as a reference and using a cutter rotating relative to the integrated component.
As a preferred technical solution, the step (c) comprises the steps of:
and finishing the end face of the step far away from the shaft body to form a finished structure.
Further comprising, between steps (b) and (c), the steps of:
and removing redundant welding materials for welding the shaft step and the round hole.
As a preferable technical scheme, the welding mode comprises argon arc welding, friction welding, laser welding or ultrasonic welding.
Compared with the prior art, the technical scheme has the following advantages:
the rotor disc and the rotating shaft are both subjected to rough machining and are formed, and an integrated assembly is formed by welding, so that compared with the prior art that a magnetic steel groove is machined in the rotor disc firstly, and a bearing step is machined in the rotating shaft, the position matching precision of the magnetic steel groove and the bearing step is not required to be considered, the rotor disc and the rotating shaft are assembled, the machining and assembling difficulty is effectively reduced, and the forming efficiency is improved. And the welding area is formed by the disc chamfer part and the step chamfer part, and the guide effect is utilized, so that the structural utilization rate is improved, the processing amount is reduced, and the structural strength of the assembly of the disc chamfer part and the step chamfer part is ensured. In addition, only need to integral type subassembly finish machining bearing step position with the magnetic steel groove can, not only reduce the processing volume, reduce cost still effectively guarantees the precision, does benefit to batch production.
The invention is further described with reference to the following figures and examples.
Drawings
FIG. 1 is a flow chart of a method of forming an integrated assembly having a rotor shaft and a rotor disk in accordance with the present invention;
FIG. 2 is a schematic structural view of a rotor disk according to the present invention;
FIG. 3 is a schematic structural view of the spindle according to the present invention;
FIG. 4 is a front view of the unitary assembly of the present invention;
FIG. 5 is a rear view of the unitary assembly of the present invention;
FIG. 6 is a front elevational view of the finish of the one-piece assembly of the present invention;
FIG. 7 is a finished back view of the unitary assembly of the present invention.
In the figure: 100 rotor disks, 110 disk end faces, 111 magnetic steel grooves, 120 round holes, 121 hole side faces, 1211 disk chamfering parts, 130 concave parts, 140 convex parts, 200 rotating shafts, 210 shaft bodies, 211 bearing step positions, 220 shaft steps, 221 step end faces, 2211 finishing structures, 222 step side faces, 2221 step chamfering parts and 1000 welding areas.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments described below are by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
As shown in fig. 1 to 7, the method for forming an integrated assembly having a rotating shaft and a rotor disk includes:
(a) providing a rough-machined rotor disc 100 and a rotating shaft 200, wherein the rotor disc 110 is provided with two disc end faces 110 and a circular hole 120 penetrating through the two disc end faces 110, and the rotating shaft 200 comprises a shaft body 210 and a shaft step 220 which are connected;
(b) fixing the shaft step 220 in the circular hole 120 by welding, thereby forming an integrated assembly having the rotating shaft 200 and the rotor disc 100;
(c) the rotating shaft 200 and the rotor disc 100 of the integrated assembly are simultaneously finished to form a bearing step 211 on the shaft body 210 and a magnet steel groove 111 on the disc end surface 110 on the same side as the shaft body 210.
In the step (a), the rotor disc 100 and the rotating shaft 200 are both roughly machined and formed, at this time, machining precision is not considered, then in the step (b), the rotor disc 100 and the rotating shaft 200 are welded into an integrated assembly by using the welding mode, and finally in the step (c), the integrated assembly is subjected to finish machining so as to form the bearing step 211 on the shaft body 210 and form the magnetic steel groove 111 on the disc end face 110 on the same side as the shaft body 210, only the position where the bearing step 211 is formed on the shaft body 210 and the position where the magnetic steel groove 111 is formed on the disc end face 110 can be subjected to local finish machining, so that the finish machining control difficulty is effectively reduced, and the machining amount can be correspondingly reduced. In addition, the magnetic steel groove 111 and the bearing step 211 are formed simultaneously, so that the machining efficiency is improved, and the precision of the magnetic steel groove and the bearing step is effectively guaranteed. In addition, the forming method adopts a welding mode to fix the rotor disc 100 and the rotating shaft 200, so that the forming is rapid and convenient, the processing cost is reduced, and the industrial batch production is facilitated.
As shown in fig. 1 to 3, the step (a) includes the steps of:
(a1) roughing the disc blank to form the rotor disc 100 having a rough structure, the rough structure including a protrusion 140 formed on one disc end surface 110, a recess 130 formed on the other disc end surface 110 and opposite to the protrusion 140, and a circular hole 120 penetrating the protrusion 140 and the recess 130;
(a2) the shaft blank is rough machined to form a shaft 200 having a shaft body 210 and a shaft step 220.
The precision requirement for rough machining of the disc blank and the shaft blank is not high, and the machining difficulty is effectively reduced. Further, compared with the prior art, the requirement on the processing precision of the round hole 120 and the shaft step 220 for connecting the round hole and the shaft step is not high, and the processing difficulty is effectively reduced.
The step (a1) further comprises the steps of:
forming the rough machining structure on the disc blank by using a stamping device. Namely, by one-time stamping, the disk blank forms the protrusion 140, the recess 130 and the circular hole 120 at the same time, thereby improving the forming efficiency of the rotor disk 100. Of course, the circular hole 120 may be formed by partial forming, for example, forming the protrusion 140 and the recess 130 in a first step and then stamping again.
Referring to fig. 2 and 4, the protrusion 140, the recess 130 and the circular hole 120 are located approximately at the center of the rotor disc 100, wherein the size of the circular hole 120 and the size of the shaft step 200 meet the fitting requirement.
The step (a2) further comprises the steps of:
the shaft body 210 and the shaft step 220 are formed on the shaft blank by a milling machine. The requirement on the processing precision of the shaft body 210 and the shaft step 220 is not high, and the forming efficiency of the rotating shaft 200 is effectively reduced.
Referring to fig. 3, the cross-sections of the shaft step 220 and the shaft body 210 are circular, wherein the cross-section of the shaft step 220 is slightly larger than the cross-section of the shaft body 210, and the shaft step 220 and the circular hole 120 can be matched.
As can be seen from the above, the rotor disc 100 and the rotating shaft 200 formed in the step (a) are both roughly formed, so that the difficulty of processing is low, and mass production can be performed, so as to weld and fix in the subsequent steps.
As shown in fig. 2 to 5, the step (b) includes the steps of:
(b1) fitting the shaft step 220 into the circular hole 120 with interference fit, and forming at least one welding region 1000 between the shaft step 220 and the circular hole 120;
(b2) the welding area 1000 is filled by the welding method to weld and fix the shaft step 220 and the circular hole 120.
The rotor disc 100 and the rotating shaft 200 are welded to form an integrated assembly with the rotating shaft 200 and the rotor disc 100, the process is simple, the molding efficiency of the integrated assembly is effectively improved, and the processing cost is low. The assembly of the shaft step 220 and the circular hole 120 can be realized by using a device, for example, a positioning tool is used to position the rotor disc 100, and then the shaft step 220 of the rotating shaft 200 is press-fitted into the circular hole 120 in an interference fit manner by using a specific device.
As shown in fig. 2, the circular hole 120 has a hole side 121 extending to connect the two disc end surfaces 110, the shaft step 220 has a two-step end surface 221, and a step side 222 extending to connect the two step end surfaces 221, and the step (b1) includes the steps of:
the step side 222 is press-fitted to the hole side 121 to achieve an interference fit, and the welding region 1000 exposed to the disc end face 110 is formed between the step side 222 and the hole side 121.
Specifically, the weld region 1000 is exposed to the disc end face 110 to facilitate welding. It should be noted that, the rotor disc 100 has two disc end faces 110, so the number of the welding areas 1000 is two, and the two welding areas correspond to one disc end face 110, respectively, and the welding fixing effect of the rotor disc 100 and the rotating shaft 200 is effectively improved by increasing the number of the welding areas 1000.
As shown in fig. 2 to 5, a disk chamfer 1211 is formed between the hole side surface 121 and the disk end surface 110, a step chamfer 2221 is formed between the step end surface 221 and the step side surface 222, and the disk chamfer 1211 and the step chamfer 2221 are opposite to each other to form a welding area 1000.
Specifically, the disc chamfer 1211 is formed between each disc end surface 110 and the hole side surface 121, and the disc chamfer 1211 is roughly formed in the step (a), so that the requirement on the dimensional accuracy is not high, and the difficulty in forming the disc chamfer 1211 is effectively reduced. Similarly, the step chamfer 2221 is formed between each step end surface 221 and each step side surface 222, and the step chamfer 2221 is roughly machined and formed in the step (a), so that the requirement on the dimensional accuracy is not high, and the difficulty in forming the step chamfer 2221 is effectively reduced.
When the shaft step 220 is press-fitted into the circular hole 120, the welding area 1000 is formed between the disk chamfered portion 1211 and the step chamfered portion 2221, which are opposite and on the same side, with reference to fig. 4 and 5. The disk chamfered portion 1211 and the step chamfered portion 2221 serve as a guide for the shaft step 220 to be press-fitted into the circular hole 120, in addition to forming the welding region 1000, thereby making a rational use of the structure without additional processing, and reducing the processing cost and difficulty.
More specifically, the step end surface 221 of the shaft step 220 is in interference fit with the hole side surface 121 of the circular hole 120, the step chamfer portions 2221 on both sides of the step end surface 221 are respectively opposite to the disc chamfer portions 1211 on both sides of the hole side surface 121, and form two welding regions 1000, the two welding regions 1000 are located on both sides of the shaft step 220, and the fixing effect of the shaft step 220 and the circular hole 120 and the structural strength of the integrated assembly are effectively improved by welding in the welding regions 1000.
The welding mode comprises argon arc welding, friction welding, laser welding or ultrasonic welding and the like. In one example, the welding region 1000 is filled with solder, argon arc welding is used to melt the solder, and the shaft step 220 and the circular hole 120 are welded to complete the molding of the integrated component.
Therefore, the rotor disc 100 and the rotating shaft 200 are fixed by welding, so that the forming is convenient and fast, and compared with the prior art, the rotor disc 100 and the rotating shaft 200 are not provided with structures such as the magnetic steel groove and the bearing step position, so that the assembly of the rotor disc 100 and the rotating shaft 200 is controlled without considering the matching precision of the magnetic steel groove and the bearing step position, the matching precision of the rotor disc 100 and the rotating shaft 200 is reduced, and the assembly efficiency is effectively improved. In addition, the disk chamfering part 1211 and the step chamfering part 2221 are utilized to form the welding area 1000, and the guide matching of the round hole 120 of the shaft step 200 is facilitated, so that the structure is reasonably utilized, and the processing cost is reduced.
The rotor disc 100 and the rotating shaft 200 may be made of steel materials with the same material, but may also be made of steel materials with different materials. The material difference may be a composition or a quality difference, for example, the rotor disc 100 is made of carbon steel, the rotating shaft 200 is made of low alloy steel, and the like. The material quality of the steel can be determined according to the parts to be installed, and the matching strength of the steel and the parts can be improved.
Further comprising, between steps (b) and (c), the steps of:
and removing redundant welding materials for welding the shaft step and the round hole.
And the appearance attractiveness of the integrated assembly product is ensured by removing the redundant solder.
As shown in fig. 6 and 7, the step (c) includes the steps of:
the bearing step 211 and the magnetic steel groove 111 are machined by a tool rotating relative to the integrated component with reference to the shaft body 210.
In one example, the shaft body 210 is positioned in a positioning tool and simultaneously drives the integrated component to rotate, at this time, the cutter is moved to a position to be processed of the integrated component, and the integrated component and the cutter move relatively, so that the integrated component simultaneously forms the bearing step 211 and the magnetic steel groove 111. Wherein the cutter can be round steel and the like.
In detail, the integrated assembly mounts magnetic steel through the magnetic steel grooves 111, mounts a bearing through the bearing step 211, and a stator disc is mounted on the bearing. The parallelism requirement of the stator disc and the rotor disc means that the magnetic steel arranged on the rotor disc 100 can ensure the parallelism with the stator disc, and the parallelism of the stator disc and the rotor disc can be ensured by controlling the machining precision of the magnetic steel groove 111 for arranging the magnetic steel and the bearing step position 211.
As a preferred technical solution, the step (c) comprises the steps of:
the stepped end surface 211 remote from the shaft body 210 is finished to form a finished structure 2211. Referring to fig. 3 and 7, the finishing structure 2211 includes hole portions and the like connected to other parts.
Therefore, through the finish machining of the bearing step 211 and the magnetic steel groove 111, the machining amount is reduced, the forming efficiency is effectively improved, and the machining cost is reduced. In addition, the shaft body 210 is used as a reference, so that the precision of the bearing step 211 and the magnetic steel groove 111 is effectively met, and the parallelism of the rotor disc and the stator disc which are installed subsequently is ensured.
In summary, the rotor disc 100 and the rotating shaft 200 are both rough machined and formed, and an integrated assembly is formed by welding, compared with the prior art that the magnetic steel groove 111 is machined on the rotor disc 100 and the bearing step 211 is machined on the rotating shaft 200, the position matching precision of the magnetic steel groove 111 and the bearing step 211 is not required to be considered to assemble the rotor disc 100 and the rotating shaft 200, the machining and assembling difficulty is effectively reduced, and the forming efficiency is improved at the same time. And the welding region 1000 is formed by the disk chamfer 1211 and the step chamfer 2221, and the guide function is performed, thereby improving the structural utilization rate, reducing the processing amount, and simultaneously ensuring the structural strength of the assembly of the disk chamfer 1211 and the step chamfer 2221. In addition, only need to integral type subassembly finish machining bearing step position 211 with magnetic steel groove 111 can, not only reduce the processing volume, reduce cost still effectively guarantees the precision, does benefit to batch production.
The above-mentioned embodiments are only for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the same, and the scope of the present invention is not limited by the embodiments, i.e. all equivalent changes or modifications made in the spirit of the present invention are still within the scope of the present invention.
Claims (9)
1. A method of forming a unitary assembly having a rotor shaft and a rotor disk, comprising:
(a) providing a rotor disc and a rotating shaft which are subjected to rough machining forming, wherein the rotor disc is provided with two disc end faces and a circular hole penetrating through the two disc end faces, and the rotating shaft comprises a shaft body and a shaft step which are connected;
(b) fixing the shaft step in the circular hole in a welding manner, so that an integrated assembly with the rotating shaft and the rotor disc is formed;
(c) and simultaneously carrying out finish machining on the rotating shaft and the rotor disc of the integrated assembly so as to form a bearing step position on the shaft body and form a magnetic steel groove on the end face of the disc on the same side as the shaft body.
2. The method of forming a unitary assembly of a rotor shaft and a rotor disk as claimed in claim 1, wherein said step (b) comprises the steps of:
(b1) fitting the shaft step into the round hole in an interference manner, and forming at least one welding area between the shaft step and the round hole;
(b2) and filling the welding area by the welding mode to weld and fix the shaft step and the round hole.
3. The method of claim 2, wherein said circular hole has a hole side surface extending to connect both said disk end surfaces, said shaft step has a two-step end surface, and a step side surface extending to connect both said step end surfaces, and said step (b1) comprises the steps of:
the step side surface is press-fitted to the hole side surface, and the welding region exposed to the disc end surface is formed between the step side surface and the hole side surface.
4. The method of claim 3, wherein a disk fillet is formed between the hole side surface and the disk end surface, a step fillet is formed between the step end surface and the step side surface, and a welding region is formed between the disk fillet and the step fillet.
5. The method of forming a unitary assembly of a rotor shaft and a rotor disk as claimed in claim 1, wherein said step (a) comprises the steps of:
(a1) roughly machining a disk blank to form the rotor disk with a roughly machined structure, wherein the roughly machined structure comprises a convex part formed on one disk end face, a concave part formed on the other disk end face and opposite to the convex part, and a circular hole penetrating through the convex part and the concave part;
(a2) and roughly machining the shaft blank to form the rotating shaft with the shaft body and the shaft steps.
6. The method of forming a unitary assembly of a rotor shaft and a rotor disk as claimed in claim 1, wherein said step (c) comprises the steps of:
and machining the bearing step and the magnetic steel groove by using the shaft body as a reference and using a cutter rotating relative to the integrated component.
7. The method of forming a unitary assembly of a rotor shaft and a rotor disk as claimed in claim 1, wherein said step (c) comprises the steps of:
and finishing the end face of the step far away from the shaft body to form a finished structure.
8. The method of forming a unitary assembly of a rotor shaft and a rotor disk as claimed in claim 1, further comprising the steps between steps (b) and (c) of:
and removing redundant welding materials for welding the shaft step and the round hole.
9. The method for forming an integrated component having a rotor shaft and a rotor disk according to claim 1, wherein the welding manner comprises argon arc welding, friction welding, laser welding or ultrasonic welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111098033.0A CN113794339B (en) | 2021-09-18 | 2021-09-18 | Method for forming integrated assembly with rotating shaft and rotor disc |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111098033.0A CN113794339B (en) | 2021-09-18 | 2021-09-18 | Method for forming integrated assembly with rotating shaft and rotor disc |
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| CN113794339A CN113794339A (en) | 2021-12-14 |
| CN113794339B true CN113794339B (en) | 2022-09-02 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107534371A (en) * | 2014-03-21 | 2018-01-02 | 埃文斯电器私人有限公司 | Rotor |
| CN107947408A (en) * | 2017-11-14 | 2018-04-20 | 珠海凯邦电机制造有限公司 | Rotor structure, motor and rotor machining method |
| CN112615451A (en) * | 2020-12-24 | 2021-04-06 | 上海盘毂动力科技股份有限公司 | Assembling method of disc type motor rotor and disc type motor rotor |
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2021
- 2021-09-18 CN CN202111098033.0A patent/CN113794339B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107534371A (en) * | 2014-03-21 | 2018-01-02 | 埃文斯电器私人有限公司 | Rotor |
| CN107947408A (en) * | 2017-11-14 | 2018-04-20 | 珠海凯邦电机制造有限公司 | Rotor structure, motor and rotor machining method |
| CN112615451A (en) * | 2020-12-24 | 2021-04-06 | 上海盘毂动力科技股份有限公司 | Assembling method of disc type motor rotor and disc type motor rotor |
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