CN113953934A - Rotor coating pre-grinding device and pre-grinding method - Google Patents
Rotor coating pre-grinding device and pre-grinding method Download PDFInfo
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- CN113953934A CN113953934A CN202111332832.XA CN202111332832A CN113953934A CN 113953934 A CN113953934 A CN 113953934A CN 202111332832 A CN202111332832 A CN 202111332832A CN 113953934 A CN113953934 A CN 113953934A
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- 238000000576 coating method Methods 0.000 title claims abstract description 78
- 239000011248 coating agent Substances 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 10
- 230000008569 process Effects 0.000 description 7
- 238000005507 spraying Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004696 Poly ether ether ketone Substances 0.000 description 2
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920002530 polyetherether ketone Polymers 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B15/00—Machines or devices designed for grinding seat surfaces; Accessories therefor
- B24B15/08—Machines or devices designed for grinding seat surfaces; Accessories therefor for grinding co-operating seat surfaces by moving one over the other
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/02—Frames; Beds; Carriages
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B47/00—Drives or gearings; Equipment therefor
- B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
- B24B47/12—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention relates to a rotor coating pre-grinding device and a pre-grinding method, wherein the pre-grinding device comprises a frame; the rack is provided with a driving device, a distance adjusting device and a first jig for mounting the first rotor; the driving device is connected with the first rotor and used for driving the first rotor to rotate on the first jig; a second jig for mounting a second rotor is arranged on one side of the first jig, and the second rotor is rotationally connected to the second jig; the distance adjusting device is arranged on one side of the second jig and used for adjusting the distance between the first jig and the second jig so as to enable the first rotor and the second rotor to be meshed for transmission and realize pre-grinding of the coatings of the first rotor and the second rotor. During the meshing transmission process of the first rotor and the second rotor, pre-grinding is performed between the first rotor and the second rotor through mutual meshing. After the coating is pre-ground, the actual gap between the meshing surfaces of the first rotor and the second rotor is corrected and controlled, the coating is good in consistency and uniformity, and the phenomenon of jamming during rotor assembly is effectively avoided.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a rotor coating pre-grinding device and a pre-grinding method.
Background
The screw compressor is a core component of a commercial air conditioning unit. The screw compressor is a double screw type, and the working mode is that a female rotor and a male rotor rotate reversely to form a compression chamber, and the volume of the compression chamber is reduced to continuously complete the processes of air suction, compression and air exhaust.
In the working process, the air leakage of the compressor causes a great loss of energy efficiency. In order to solve the problem, people develop a coating with strong wear resistance and strong adhesive force and a spraying process thereof, and the coating is sprayed and sintered on the surface of a screw compressor rotor, so that the clearance between the rotors is reduced, and the energy efficiency of the compressor is improved.
However, in the spraying process of the coating, because the thickness of the coating is difficult to control, the consistency and uniformity of the sprayed and sintered coating are difficult to ensure, and particularly the spiral shape of the rotor is more difficult to uniformly spray, so that in practical application, the actual gap between the meshing surfaces of the female rotor and the male rotor is difficult to control, and the rotor is easy to be blocked during production and assembly.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention aims to: the utility model provides a rotor coating pre-grinding device can control the thickness of coating through carrying out the pre-grinding to the coating, and coating uniformity and homogeneity are good, take place the dead phenomenon of card when avoiding rotor assembly.
In order to achieve the purpose, the invention adopts the following technical scheme:
a rotor coating pre-grinding device comprises a frame;
the rack is provided with a driving device, a distance adjusting device and a first jig for mounting the first rotor;
the driving device is connected with the first rotor and used for driving the first rotor to rotate on the first jig;
a second jig for mounting a second rotor is arranged on one side of the first jig, and the second rotor is rotationally connected to the second jig;
the distance adjusting device is arranged on one side of the second jig and used for adjusting the distance between the first jig and the second jig so as to enable the first rotor and the second rotor to be meshed for transmission and realize pre-grinding of the coatings of the first rotor and the second rotor.
Further, apart from adjusting device including base and catch bar, first tool and base set firmly respectively in the frame, second tool sliding connection in base, catch bar connect in the second tool for order about the second tool and slide along first tool direction.
Further, the push rod is connected to the base in a threaded manner.
Further, catch bar threaded connection is in the base, and the base is equipped with the scale interval.
Further, be equipped with the guide rail on the base, second tool sliding connection is in the guide rail, and guide rail and second tool are equipped with corresponding screw hole.
Further, still be equipped with apart from detection device in the frame, apart from detection device and locate second tool one side for detect the distance difference before and after the distance adjustment between first tool and the second tool.
Further, the distance detection device is a dial indicator, the dial indicator is fixedly connected to the rack, and a measuring head of the dial indicator abuts against the circumferential side wall of the second rotor.
Further, the bottom of the frame is provided with a leveling device.
A rotor coating pre-grinding method comprises the following steps,
the distance adjusting device adjusts the distance between the first jig and the second jig, so that the first rotor and the second rotor are in meshing transmission to realize pre-grinding of the coatings of the first rotor and the second rotor;
the first rotor is arranged on the first jig, and the second rotor is arranged on the second jig;
the first rotor is driven to rotate by a driving device.
Further, the method comprises the following steps that the distance detection device obtains the pre-grinding amount of the coating of the first rotor and the coating of the second rotor, and the pre-grinding amount of the coating is obtained by detecting the distance difference between the first jig and the second jig before and after the distance adjustment.
In summary, the present invention has the following advantages:
the distance between the first jig and the second jig is shortened by using the distance adjusting device, so that the first rotor and the second rotor are close to each other and are in meshing transmission. During the meshing transmission process of the first rotor and the second rotor, pre-grinding is performed between the first rotor and the second rotor through mutual meshing. After the coating is pre-ground, the actual gap between the meshing surfaces of the first rotor and the second rotor is corrected and controlled, the coating is good in consistency and uniformity, and the phenomenon of jamming during rotor assembly is avoided.
Drawings
FIG. 1 is a schematic top view of a rotor coating pre-grinding apparatus of the present invention.
Fig. 2 is a schematic front view of a rotor coating pre-grinding apparatus of the present invention.
FIG. 3 is a schematic side view of a rotor coating pre-grinding apparatus of the present invention.
Reference numerals:
1-motor, 2-reducer, 3-motor base, 4-supporting part, 5-push rod, 6-dial indicator, 7-measuring head, 8-base, 9-belt wheel, 10-belt, 11-supporting mechanism, 12-supporting frame, 13-frame, 14-leveling device, 15-thimble, 21-first rotor, 22-second rotor.
Detailed Description
The present invention will be described in further detail below.
As shown in fig. 1 to 3, a rotor coating pre-grinding device includes a frame 13;
the frame 13 is provided with a driving device, a distance adjusting device and a first jig for mounting the first rotor 21;
the driving device is connected to the first rotor 21 and used for driving the first rotor 21 to rotate on the first jig;
a second jig for mounting the second rotor 22 is arranged on one side of the first jig, and the second rotor 22 is rotationally connected with the second jig;
the distance adjusting device is arranged on one side of the second jig and is used for adjusting the distance between the first jig and the second jig so as to enable the first rotor 21 and the second rotor 22 to be meshed and driven to realize pre-grinding of the coatings of the first rotor 21 and the second rotor 22.
In the present embodiment, the first rotor 21 and the second rotor 22 are only used to distinguish the two rotors, and the first rotor 21 and the second rotor 22 may be a female rotor and a male rotor, respectively, or a male rotor and a female rotor, respectively.
Specifically, the first jig and the second jig are parallel to each other, and after the first rotor 21 and the second rotor 22 after coating spraying are respectively installed on the first jig and the second jig, the first rotor 21 and the second rotor 22 are also parallel to each other. The first rotor 21 is driven to rotate by the driving device, and then the distance between the first jig and the second jig is shortened by the distance adjusting device, so that the first rotor 21 and the second rotor 22 are close to each other and are in meshing transmission. During the meshing transmission of the first rotor 21 and the second rotor 22, pre-grinding is performed between the first rotor and the second rotor through mutual meshing. After the coating is pre-ground, the actual gap between the meshing surfaces of the first rotor 21 and the second rotor 22 is corrected and controlled, the coating is good in consistency and uniformity, and the phenomenon of jamming during rotor assembly is avoided.
The rotor coating pre-grinding device of this embodiment need not to carry out the special design to coating spraying process, can control the thickness of first rotor 21 and second rotor 22 meshing top coat through carrying out the pre-grinding to the coating, and then control clearance between the rotor, and coating uniformity and homogeneity are good, take place the dead phenomenon of card when avoiding rotor assembly.
The distance adjusting device comprises a base 8 and a push rod 5, the first jig and the base 8 are fixedly arranged on the rack 13 respectively, the second jig is connected to the base 8 in a sliding mode, and the push rod 5 is connected to the second jig and used for driving the second jig to slide along the direction of the first jig.
In this embodiment, the first jig is fixed in position, and the second jig is adjustable in position to control the pressing force between the first rotor 21 and the second rotor 22. When the push rod 5 drives the second jig to slide on the base 8, the second jig can be close to or far away from the first jig. The coating pre-grinding amount of the first rotor 21 and the coating pre-grinding amount of the second rotor 22 can be controlled by adjusting the moving amount of the second jig, so that the coating thickness is controlled, the coating consistency and uniformity are good, and the phenomenon of jamming during rotor assembly is avoided.
The push rod 5 is screwed to the base 8. Because threaded connection has certain self-locking effect, the position is difficult to appear sliding when catch bar 5 orders about the second tool and removes, is favorable to controlling the coating volume of pregrinding. The base 8 is provided with a scale value, so that the movement amount of the second jig driven by the push rod 5 can be better judged, and the pre-grinding amount of the coating can be more conveniently controlled.
The first jig and the second jig respectively comprise two ejector pins 15 which are correspondingly arranged, and a V-shaped supporting mechanism 11 used for supporting the rotor is arranged between the two ejector pins 15. Wherein the V-shaped supporting mechanism 11 of the first rotor 21 is fixed in position, and the V-shaped supporting mechanism 11 of the second rotor 22 can slide to adapt to the position adjustment of the second rotor 22. The two ejector pins 15 are respectively abutted against two end faces of the first rotor 21 or the second rotor 22, so that the first rotor 21 or the second rotor 22 cannot be displaced during rotation, and accurate pre-grinding of the coating is facilitated.
Because the weight of the rotor is large, when the rotor is loaded, the rotor is firstly transferred to the V-shaped supporting mechanism 11 by the traveling crane, the rotor is supported by the V-shaped supporting mechanism 11, and then the two ejector pins are respectively abutted to the end face of the rotor. When the rotor is needed to be pre-ground, the V-shaped supporting mechanism 11 is lowered, so that the rotor is separated from the V-shaped supporting mechanism 11, and the rotation of the rotor is not influenced.
In this embodiment, the base 8 is provided with a guide rail, the guide rail is provided with an L-shaped fixing block, and the L-shaped fixing block slides on the guide rail. The ejector pin of the second jig is arranged on the L-shaped fixing block. L shape fixed block and guide rail all are equipped with a plurality of screw holes. When the ejector pin of the second jig moves to a certain position, the ejector pin of the second jig is firmly fixed at the position through the threaded hole of the L-shaped fixing block and the guide rail, so that the two rotors cannot displace during meshing transmission, and the accurate pre-grinding effect is favorably obtained.
One end of the push rod 5 is connected with a supporting part 4, and the supporting part 4 is tightly propped against the second rotor 22 through an L-shaped fixing block.
Still be equipped with apart from detection device on the frame 13, apart from detection device and locate second tool one side, through detecting the distance difference between first tool and the second tool before and after the distance adjustment, can obtain the coating pre-grinding volume of first rotor 21 and second rotor 22. Not only can carry out the coarse adjustment from the scale value that base 8 set up, can also follow distance detection device and can obtain more accurate reading, and then obtain more accurate coating pre-grinding volume.
The distance detecting means may be various measuring means capable of measuring a minute measuring range in the related art. In this embodiment, the distance detecting device is a dial indicator 6, the dial indicator 6 is fixed to the frame 13 through the supporting frame 12, and the measuring head 7 of the dial indicator 6 abuts against the circumferential sidewall of the second rotor 22.
After the screw rod is adjusted the location and is accomplished in the beginning, catch bar 5 orders about the second tool and is close to and can mesh the pre-grinding to first tool direction. Because the measuring head 7 of the dial indicator 6 abuts against the circumferential side wall of the second rotor 22, and the second jig displaces towards the first jig, that is, the second jig moves towards the direction away from the dial indicator 6, the measuring head 7 of the dial indicator 6 extends forwards, and the reading of the dial indicator 6 changes. The reading change value is the distance difference between the first jig and the second jig before and after the distance adjustment, and is the pre-grinding amount of the coating pre-ground for the first time. And comparing the pre-grinding amount of the coating with the planned pre-grinding amount, and if the pre-grinding amount of the coating does not reach the planned pre-grinding amount, continuing to perform secondary pre-grinding, and so on. Because the index value of the dial indicator 6 is 0.01mm, and the measuring ranges are 0-3 mm, 0-5 mm and 0-10 mm, very accurate pre-grinding amount can be obtained, and the coating thickness can be accurately controlled.
The bottom of the frame 13 is provided with a leveling device 14 (leveling bolt), and after leveling, the flatness of the frame 13 and each mechanism arranged on the frame 13 can be ensured, which is beneficial to obtaining accurate pre-grinding effect.
A rotor coating pre-grinding method comprises the following steps,
the distance adjusting device adjusts the distance between the first jig and the second jig, so that the first rotor 21 and the second rotor 22 are in meshing transmission to realize the pre-grinding of the coatings of the first rotor 21 and the second rotor 22;
the first rotor 21 is arranged on the first jig, and the second rotor 22 is arranged on the second jig;
the first rotor 21 is driven to rotate by a driving device.
In the prior art, a special coating spraying process is usually adopted to sinter the surface of a screw compressor rotor, so that the clearance between the rotors is reduced, and the energy efficiency of the compressor is improved. However, the spiral shape of the rotor is difficult to be uniformly sprayed, so that in practical application, the actual gap between the meshing surfaces of the female rotor and the male rotor is difficult to control, the thickness of the coating cannot be controlled, and the rotor is easy to be blocked during assembly.
The invention does not need to specially design the spraying process of the coating, can control the thickness of the meshing surface coating of the first rotor 21 and the second rotor 22 by pre-grinding the coating, and further control the clearance between the rotors, thereby realizing the control of the thickness of the coating, having good consistency and uniformity of the coating and avoiding the phenomenon of jamming when the rotors are assembled.
The method further comprises the following step that the distance detection device obtains the pre-grinding amount of the coating of the first rotor 21 and the second rotor 22, and the pre-grinding amount of the coating is obtained by detecting the distance difference between the first jig and the second jig before and after the distance adjustment.
In this embodiment, the motor base 3 is disposed on the frame 13, the driving device is the motor 1, and the speed reducer 2, the belt pulley 9 and the belt 10 drive the first rotor 21 to rotate, so that the first rotor 21 drives the second rotor 22 to rotate reversely. The input power of the motor 1 is adjustable and can be read in real time. The first rotor 21 speed can be monitored and read.
After the first rotor 21 and the second rotor 22 of the compressor are sprayed with PEEK, the rotors are fixedly placed on a rotor coating pre-grinding device, and the rotors are driven to rotate and meshed for transmission through the motor 1 to pre-grind the sprayed PEEK with the overall or local thicker surface area.
Referring to the feeding mode of the machine tool, each time the pre-grinding is carried out in a rotating mode, the L-shaped fixing block supporting the second rotor 22 is fixed at a certain scale position on the guide rail and is fed to one side of the first rotor 21 for multiple times gradually after a certain coating thickness is ground.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. A rotor coating pre-grinding device is characterized in that: comprises a frame;
the rack is provided with a driving device, a distance adjusting device and a first jig for mounting the first rotor;
the driving device is connected with the first rotor and used for driving the first rotor to rotate on the first jig;
a second jig for mounting a second rotor is arranged on one side of the first jig, and the second rotor is rotationally connected to the second jig;
the distance adjusting device is arranged on one side of the second jig and used for adjusting the distance between the first jig and the second jig so as to enable the first rotor and the second rotor to be meshed for transmission and realize pre-grinding of the coatings of the first rotor and the second rotor.
2. A rotor coating pre-grinding apparatus as defined in claim 1, wherein: the distance adjusting device comprises a base and a push rod, the first jig and the base are fixedly arranged on the rack respectively, the second jig is connected to the base in a sliding mode, and the push rod is connected to the second jig and used for driving the second jig to slide along the direction of the first jig.
3. A rotor coating pre-grinding apparatus as defined in claim 2, wherein: the catch bar is in threaded connection with the base, and the base is provided with a scale value.
4. A rotor coating pre-grinding apparatus as defined in claim 3, wherein: be equipped with the guide rail on the base, second tool sliding connection is in the guide rail, and guide rail and second tool are equipped with corresponding screw hole.
5. A rotor coating pre-grinding apparatus as defined in claim 1, wherein: the first jig and the second jig respectively comprise two ejector pins correspondingly arranged, and a V-shaped supporting mechanism used for supporting the rotor is arranged between the two ejector pins.
6. A rotor coating pre-grinding apparatus as defined in claim 1, wherein: the rack is also provided with a distance detection device, and the distance detection device is arranged on one side of the second jig and used for detecting the distance difference between the first jig and the second jig before and after the distance adjustment.
7. A rotor coating pre-grinding apparatus as defined in claim 6, wherein: the distance detection device is a dial indicator which is fixedly connected to the rack, and a measuring head of the dial indicator is abutted against the circumferential side wall of the second rotor.
8. A rotor coating pre-grinding apparatus as defined in claim 1, wherein: the bottom of the frame is provided with a leveling device.
9. A rotor coating pre-grinding method is characterized in that: comprises the following steps of (a) carrying out,
the distance adjusting device adjusts the distance between the first jig and the second jig, so that the first rotor and the second rotor are in meshing transmission to realize pre-grinding of the coatings of the first rotor and the second rotor;
the first rotor is arranged on the first jig, and the second rotor is arranged on the second jig;
the first rotor is driven to rotate by a driving device.
10. A method of pre-grinding a rotor coating as defined in claim 9, wherein: the method comprises the following steps that the distance detection device obtains the pre-grinding quantity of the coating of the first rotor and the coating of the second rotor, and the pre-grinding quantity of the coating is obtained by detecting the distance difference between the first jig and the second jig before and after the distance adjustment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111332832.XA CN113953934A (en) | 2021-11-11 | 2021-11-11 | Rotor coating pre-grinding device and pre-grinding method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111332832.XA CN113953934A (en) | 2021-11-11 | 2021-11-11 | Rotor coating pre-grinding device and pre-grinding method |
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| CN113953934A true CN113953934A (en) | 2022-01-21 |
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| CN105720755A (en) * | 2016-03-30 | 2016-06-29 | 亚杰科技（江苏）有限公司 | Jig for motor rotor production line |
| CN110612404A (en) * | 2016-07-14 | 2019-12-24 | 爱信高丘株式会社 | Disk rotor, device for manufacturing disk rotor, roller, and method for manufacturing disk rotor |
| CN110848137A (en) * | 2019-11-06 | 2020-02-28 | 珠海格力电器股份有限公司 | Zero-clearance screw rotor and preparation method thereof |
| CN112139063A (en) * | 2020-08-11 | 2020-12-29 | 宁波市鄞州特尔斐电子有限公司 | Motor rotor detection blanking equipment with reversing mechanism and method |
| CN112247781A (en) * | 2020-10-21 | 2021-01-22 | 滁州市天鸿冲塑制品有限公司 | Surface polishing device for motor rotor production |
| CN113245839A (en) * | 2021-06-30 | 2021-08-13 | 青岛欧开智能系统有限公司 | Special assembling machine for large screw type rotor |
| CN216327233U (en) * | 2021-11-11 | 2022-04-19 | 格力电器（武汉）有限公司 | Rotor coating pre-grinding device |
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