CN106256465B - A kind of restorative procedure of car motor rotor - Google Patents
A kind of restorative procedure of car motor rotor Download PDFInfo
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- CN106256465B CN106256465B CN201610696551.5A CN201610696551A CN106256465B CN 106256465 B CN106256465 B CN 106256465B CN 201610696551 A CN201610696551 A CN 201610696551A CN 106256465 B CN106256465 B CN 106256465B
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000005245 sintering Methods 0.000 claims abstract description 18
- 238000007493 shaping process Methods 0.000 claims abstract description 11
- 239000011812 mixed powder Substances 0.000 claims abstract description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 6
- 239000010439 graphite Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 10
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 229910052796 boron Inorganic materials 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 229910052750 molybdenum Inorganic materials 0.000 claims description 5
- 239000011733 molybdenum Substances 0.000 claims description 5
- 229910052759 nickel Inorganic materials 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 239000010936 titanium Substances 0.000 claims description 5
- 229910052719 titanium Inorganic materials 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 239000011572 manganese Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 238000009472 formulation Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
-
- B22F1/0003—
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
- B22F2007/068—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts repairing articles
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Motors, Generators (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The present invention discloses a kind of restorative procedure of car motor rotor, belongs to motor component recovery technique field.The present invention includes the following steps：Batch mixing；Bake pressure；Secondary bake pressure；Sintering；Heat treatment；Shaping.Increase graphite in invention raw material, increase the wearability and lubricity of rotor, reducing friction resistance increases the efficiency of motor, improves the density and hardness of rotor；The rotor dense structure of the mixed powder manufacture of inventive formulation, microstructure is good, and hole is few, and the rigidity of structure, hardness, fatigue performance, tensile strength properties are excellent；As a result of molding, equipment is made to simplify, reduces production cost.
Description
Technical field
The present invention relates to motor component technical field, the restorative procedure of specifically a kind of car motor rotor.
Background technology
Rotor is the rotary part in motor, and motor is made of rotor and stator two parts, it is for realizing electricity
Electromechanics can be with the transfer rotor of mechanical energy and mechanical energy and electric energy.Rotor is divided into motor rotor and generator amature.It is existing
Although the rotor of reparation can be repaired by having powder metallurgy process also, its precision and intensity are generally relatively low, and frictional resistance is big, lead
It is low to send a telegraph engine efficiency.
Invention content
The purpose of the present invention is to provide a kind of restorative procedures of car motor rotor.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of restorative procedure of car motor rotor, includes the following steps：
(1) batch mixing：Content weighs the stone of the copper of 0.1-2.6%, the silicon of 0.2-0.5%, 0.5-0.9% by weight percentage
Ink, the titanium of 0.01-0.03%, the boron of 0.01-0.05%, the nickel of 1.8-2.4%, the manganese of 0.5-75%, 0.2-0.4% molybdenum,
Surplus is iron and inevitable impurity, is mixed into mixed powder；
(2) bake pressures：Rotor compacting tool set is installed on press, mixed powder is packed into mold cavity, and heating rises
Temperature is compressed to a bake pressure base to 130-140 DEG C, keeps the temperature 10h, pressing pressure 600-680MPa；
(3) secondary bake pressure：Rotor compacting tool set is installed on press, and a bake pressure base is put into mold cavity, is added
Heat is warming up to 130-140 DEG C, is compressed to secondary bake pressure base, keeps the temperature 8h, pressing pressure 600-680MPa；
(4) it is sintered：Secondary bake pressure base is sintered to obtain agglomerated material, sintering temperature 1020- in vacuum pressure sintering furnace
1080 DEG C, sintering time 55-70min；
(5) it is heat-treated：Agglomerated material obtained by step (4) is heated under protective atmosphere, in 810-850 DEG C of glowing furnace
It is quenched after heat preservation 2h, 2-3h is then tempered under the conditions of 200-220 DEG C, it is cooling；
(6) shaping：Shaping, deburring processing are carried out to the product after heat treatment.
The hardening media is water.
The heating rate is 2 DEG C/min.
Vacuum degree is less than 0.02Pa when step (4) vacuum-sintering.
Step (5) the heat treatment protective atmosphere used is High Purity Nitrogen, and oxygen content is less than 10PPM, and dew point is less than -40 DEG C.
Beneficial effects of the present invention：Increase graphite in raw material of the present invention, increase the wearability and lubricity of rotor reparation,
Reducing friction resistance increases the efficiency of motor, improves the density and hardness of rotor；The reparation of the present invention is formulated mixed powder reparation
Rotor dense structure, microstructure is good, and hole is few, the rigidity of structure, hardness, fatigue performance, tensile strength properties
It is excellent；As a result of molding, equipment is made to simplify, reduces production cost.
Specific implementation mode
Technical scheme of the present invention is clearly and completely described below in conjunction with embodiment, it is clear that described reality
It is only a part of the embodiment of the present invention to apply example, instead of all the embodiments.Based on the embodiments of the present invention, this field is general
All other embodiment that logical technical staff is obtained without creative efforts belongs to what the present invention protected
Range.
Embodiment 1
A kind of restorative procedure of car motor rotor, includes the following steps：
(1) batch mixing：By weight percentage content weigh 2.6% copper, 0.5% silicon, 0.7% graphite, 0.01%
Titanium, 0.05% boron, 2.4% nickel, 0.6% manganese, 0.3% molybdenum, surplus are iron and inevitable impurity, are mixed into mixed
Close powder；
(2) bake pressures：Install rotor compacting tool set on press, mixed powder be packed into mold cavity, with 2 DEG C/
The heating rate of min is heated to 130 DEG C, is compressed to a bake pressure base, keeps the temperature 10h, pressing pressure 600MPa；
(3) secondary bake pressure：Rotor compacting tool set is installed on press, a bake pressure base is put into mold cavity, with 2
DEG C/heating rate of min is heated to 135 DEG C, it is compressed to secondary bake pressure base, keeps the temperature 8h, pressing pressure 650MPa；
(4) it is sintered：Secondary bake pressure base is sintered to obtain agglomerated material in vacuum pressure sintering furnace, vacuum degree is less than
0.02Pa, 1020 DEG C of sintering temperature, sintering time 60min；
(5) it is heat-treated：Agglomerated material obtained by step (4) is heated under protective atmosphere, protective atmosphere is High Purity Nitrogen, and oxygen contains
Amount is less than 10PPM, and dew point is less than -40 DEG C, is quenched after keeping the temperature 2h in 810 DEG C of glowing furnace, hardening media is water, is then existed
3h is tempered under the conditions of 220 DEG C, it is cooling；
(6) shaping：Shaping, deburring processing are carried out to the product after heat treatment.
Embodiment 2
A kind of restorative procedure of car motor rotor, includes the following steps：
(1) batch mixing：By weight percentage content weigh 0.1% copper, 0.4% silicon, 0.9% graphite, 0.03%
Titanium, 0.03% boron, 1.8% nickel, 0.5% manganese, 0.4% molybdenum, surplus are iron and inevitable impurity, are mixed into mixed
Close powder；
(2) bake pressures：Install rotor compacting tool set on press, mixed powder be packed into mold cavity, with 2 DEG C/
The heating rate of min is heated to 140 DEG C, is compressed to a bake pressure base, keeps the temperature 10h, pressing pressure 600MPa；
(3) secondary bake pressure：Rotor compacting tool set is installed on press, a bake pressure base is put into mold cavity, with 2
DEG C/heating rate of min is heated to 130 DEG C, it is compressed to secondary bake pressure base, keeps the temperature 8h, pressing pressure 680MPa；
(4) it is sintered：Secondary bake pressure base is sintered to obtain agglomerated material in vacuum pressure sintering furnace, vacuum degree is less than
0.02Pa, 1080 DEG C of sintering temperature, sintering time 55min；
(5) it is heat-treated：Agglomerated material obtained by step (4) is heated under protective atmosphere, protective atmosphere is High Purity Nitrogen, and oxygen contains
Amount is less than 10PPM, and dew point is less than -40 DEG C, is quenched after keeping the temperature 2h in 850 DEG C of glowing furnace, hardening media is water, is then existed
2.5h is tempered under the conditions of 200 DEG C, it is cooling；
(6) shaping：Shaping, deburring processing are carried out to the product after heat treatment.
Embodiment 3
A kind of restorative procedure of car motor rotor, includes the following steps：
(1) batch mixing：By weight percentage content weigh 1.2% copper, 0.2% silicon, 0.5% graphite, 0.02%
Titanium, 0.01% boron, 2.1% nickel, 0.75% manganese, 0.2% molybdenum, surplus are iron and inevitable impurity, are mixed into
Mixed powder；
(2) bake pressures：Install rotor compacting tool set on press, mixed powder be packed into mold cavity, with 2 DEG C/
The heating rate of min is heated to 135 DEG C, is compressed to a bake pressure base, keeps the temperature 10h, pressing pressure 680MPa；
(3) secondary bake pressure：Rotor compacting tool set is installed on press, a bake pressure base is put into mold cavity, with 2
DEG C/heating rate of min is heated to 135 DEG C, it is compressed to secondary bake pressure base, keeps the temperature 8h, pressing pressure 640MPa；
(4) it is sintered：Secondary bake pressure base is sintered to obtain agglomerated material in vacuum pressure sintering furnace, vacuum degree is less than
0.02Pa, 1050 DEG C of sintering temperature, sintering time 70min；
(5) it is heat-treated：Agglomerated material obtained by step (4) is heated under protective atmosphere, protective atmosphere is High Purity Nitrogen, and oxygen contains
Amount is less than 10PPM, and dew point is less than -40 DEG C, is quenched after keeping the temperature 2h in 830 DEG C of glowing furnace, hardening media is water, is then existed
2h is tempered under the conditions of 210 DEG C, it is cooling；
(6) shaping：Shaping, deburring processing are carried out to the product after heat treatment.
It repairs the embodiment 1-3 to obtain rotor and be tested for the property, test result is as shown in table 1.
Table 1
This hair can be understood and applied the above description of the embodiments is intended to facilitate those skilled in the art
It is bright.Person skilled in the art obviously easily can make various modifications to case study on implementation, and described herein one
As principle be applied in other embodiment without having to go through creative labor.Therefore, the present invention is not limited to implementation cases here
Example, those skilled in the art's announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be
Within protection scope of the present invention.
Claims (1)
1. a kind of restorative procedure of car motor rotor, which is characterized in that this approach includes the following steps：
(1) batch mixing：By weight percentage content weigh the copper of 0.1-2.6%, the silicon of 0.2-0.5%, 0.5-0.9% graphite,
The molybdenum, remaining of the titanium of 0.01-0.03%, the boron of 0.01-0.05%, the nickel of 1.8-2.4%, the manganese of 0.5-0.75%, 0.2-0.4%
Amount is iron and inevitable impurity, is mixed into mixed powder；
(2) bake pressures：Rotor compacting tool set is installed on press, mixed powder is packed into mold cavity, is heated to
130-140 DEG C, it is compressed to a bake pressure base, keeps the temperature 10h, pressing pressure 600-680MPa；
(3) secondary bake pressure：Rotor compacting tool set is installed on press, a bake pressure base is put into mold cavity, and heating rises
Temperature is compressed to secondary bake pressure base to 130-140 DEG C, keeps the temperature 8h, pressing pressure 600-680MPa；
(4) it is sintered：Secondary bake pressure base is sintered to obtain agglomerated material in vacuum pressure sintering furnace, 1020-1080 DEG C of sintering temperature,
Sintering time is 55-70min；
(5) it is heat-treated：Agglomerated material obtained by step (4) is heated under protective atmosphere, is kept the temperature in 810-850 DEG C of glowing furnace
It is quenched after 2h, 2-3h is then tempered under the conditions of 200-220 DEG C, it is cooling；
(6) shaping：Shaping, deburring processing are carried out to the product after heat treatment；
The hardening media is water；
The heating rate is 2 DEG C/min；
Vacuum degree is less than 0.02Pa when step (4) vacuum-sintering；
Step (5) the heat treatment protective atmosphere used is High Purity Nitrogen, and oxygen content is less than 10PPM, and dew point is less than -40 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610696551.5A CN106256465B (en) | 2016-08-22 | 2016-08-22 | A kind of restorative procedure of car motor rotor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610696551.5A CN106256465B (en) | 2016-08-22 | 2016-08-22 | A kind of restorative procedure of car motor rotor |
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| Publication Number | Publication Date |
|---|---|
| CN106256465A CN106256465A (en) | 2016-12-28 |
| CN106256465B true CN106256465B (en) | 2018-08-07 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60174847A (en) * | 1984-02-20 | 1985-09-09 | Toshiba Corp | Ferrous sintered member |
| CN102114535A (en) * | 2009-12-30 | 2011-07-06 | 倪志刚 | Iron-based powder metallurgy |
| CN103537691A (en) * | 2013-10-11 | 2014-01-29 | 芜湖市鸿坤汽车零部件有限公司 | Iron-based powder metallurgy alloy and manufacturing method thereof |
| CN103537666A (en) * | 2013-10-11 | 2014-01-29 | 芜湖市鸿坤汽车零部件有限公司 | Powder metallurgy oil pump rotor and manufacturing method thereof |
| CN104889408A (en) * | 2015-06-09 | 2015-09-09 | 黄山凯新技术咨询有限公司 | Method of processing auto motor rotor |
| CN104942297A (en) * | 2015-06-11 | 2015-09-30 | 重庆通赛机电有限公司 | Manufacturing method of electric vehicle motor rotor |
-
2016
- 2016-08-22 CN CN201610696551.5A patent/CN106256465B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60174847A (en) * | 1984-02-20 | 1985-09-09 | Toshiba Corp | Ferrous sintered member |
| CN102114535A (en) * | 2009-12-30 | 2011-07-06 | 倪志刚 | Iron-based powder metallurgy |
| CN103537691A (en) * | 2013-10-11 | 2014-01-29 | 芜湖市鸿坤汽车零部件有限公司 | Iron-based powder metallurgy alloy and manufacturing method thereof |
| CN103537666A (en) * | 2013-10-11 | 2014-01-29 | 芜湖市鸿坤汽车零部件有限公司 | Powder metallurgy oil pump rotor and manufacturing method thereof |
| CN104889408A (en) * | 2015-06-09 | 2015-09-09 | 黄山凯新技术咨询有限公司 | Method of processing auto motor rotor |
| CN104942297A (en) * | 2015-06-11 | 2015-09-30 | 重庆通赛机电有限公司 | Manufacturing method of electric vehicle motor rotor |
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| Publication number | Publication date |
|---|---|
| CN106256465A (en) | 2016-12-28 |
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