CN113477857A - Forming processing method of hollow motor shaft - Google Patents
Forming processing method of hollow motor shaft Download PDFInfo
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- CN113477857A CN113477857A CN202110365191.1A CN202110365191A CN113477857A CN 113477857 A CN113477857 A CN 113477857A CN 202110365191 A CN202110365191 A CN 202110365191A CN 113477857 A CN113477857 A CN 113477857A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/02—Preliminary treatment of metal stock without particular shaping, e.g. salvaging segregated zones, forging or pressing in the rough
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/06—Making machine elements axles or shafts
- B21K1/063—Making machine elements axles or shafts hollow
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- Mechanical Engineering (AREA)
- Forging (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention relates to a forming processing method of a hollow motor shaft, which belongs to the technical field of precision transmission part processing and comprises the following steps: step S1, obtaining a bar meeting the requirements of parts; step S2, manufacturing the bar into a pipe blank; step S3, performing primary heat treatment on the pipe blank, and obtaining a pipe material with a required length; step S4, preprocessing the outer circle of the tube material; s5, performing rotary swaging on the tube stock to obtain a variable-diameter multi-step hollow rotor shaft blank; step S6, carrying out one-time machining on the hollow rotor shaft blank; step S7, carrying out secondary heat treatment on the hollow rotor shaft blank; step S8, carrying out secondary machining on the blank of the hollow rotor shaft to form the hollow rotor shaft; and step S9, carrying out finished product detection on the hollow rotor shaft. By adopting the process method, the hollow motor shaft meeting the requirements can be processed and manufactured, the processing procedure of parts is shortened, the processing efficiency is improved, the cost is saved, and the utilization rate of related materials and the product competitiveness are improved.
Description
Technical Field
The invention belongs to the technical field of precision transmission part processing, and particularly relates to a forming processing method of a hollow motor shaft.
Background
The new energy electric vehicle is the development direction of the automobile industry at present and in the future, the development trend is strong, but the endurance mileage problem is one of the factors restricting the development of the electric vehicle, and the conventional endurance mileage is 550 kilometers. In order to improve the endurance mileage, the light weight of the automobile is one of the key technologies for improving the endurance mileage. Therefore, the motor and the speed reducing mechanism of the electric vehicle need to be designed with compact structure and light weight to reduce the weight of the whole vehicle. Because the torque of the shaft drive is at the surface, large OEMs have designed hollow motor shafts, typically of carburized or medium carbon steel, such as 20MnCr5, 42CrMo4, 45 steel. The hollow motor shaft structure is typically characterized in that the middle part is thick, the two ends are small (the middle diameter is large, the two ends are small), the wall thickness of the middle part is 4-8mm, the section ratio (the ratio of the inner hole area to the outer circle area) S1/S2 of the section at the position is more than or equal to 55%, and if the weight of the hollow shaft is folded into the weight of the hollow pipe with the same size as the middle part, the length-diameter ratio L/d of the inner hole of the hollow pipe is more than or equal to 4, as shown in figures 3 and 4.
In the prior art, when a hollow motor shaft is processed, firstly, a raw material is subjected to cold extrusion forming to form a pipe blank, in the process of forming the pipe blank, in order to achieve the characteristics of uniform wall thickness, consistent flow line and the like, a plurality of cold extrusion processes are often required to be carried out to obtain the pipe blank with the length-diameter ratio of more than or equal to 2.5, if a hollow pipe with the length-diameter ratio of more than or equal to 4 and the section ratio of more than or equal to 55% is to be prepared, a traditional backward extrusion and reducing and drawing forming mode is adopted, the blank needs to be subjected to a plurality of heat treatment, surface treatment and lubricating treatment, the steps are various, the processing period is long, the cost is high, and in addition, due to the limitation of equipment and forming limits, the size of the pipe blank is restrained to a certain extent.
When the finally formed tube blank is processed to form the hollow motor shaft, in the process of multiple times of small-deformation shaping forming of the tube blank, the tube blank with the wall thickness of 4-8mm and the section ratio larger than 55% cannot be directly processed in the prior art, the tube blank with the section ratio smaller than 55% which needs to be used is firstly selected, namely the wall thickness is relatively large, and then the tube wall is processed, so that the section ratio of a semi-finished product of the hollow motor shaft is larger than 55%, and the hollow motor shaft meeting the requirements can be finally formed. Meanwhile, the section ratio of the tube blank used in the processing is less than 55%, so when the tube blank is converted into the weight of the hollow tube with the same size, the length-diameter ratio of the inner hole of the hollow tube is relatively smaller, namely the wall thickness is relatively thicker, and further, the utilization rate of the material of the hollow motor shaft processed and formed by using the material is relatively lower. Secondly, when in machining, the variable-diameter multi-step hollow rotor shaft can only be obtained by a solid forging blank in a machining mode if the traditional process is adopted, and the mode not only wastes materials and has high requirements on machining, but also has high overall machining cost and low competitiveness.
Disclosure of Invention
In view of the problems in the prior art, the invention aims to provide a forming method of a hollow motor shaft, which can process and manufacture the hollow motor shaft meeting the requirements, and compared with the traditional processing technology, the process greatly reduces the processing procedures of parts during processing, improves the processing efficiency, saves the processing cost, shortens the processing period, improves the utilization rate of related materials, saves the processing cost and improves the product competitiveness.
In order to achieve the above object, the present invention provides a technical solution as follows:
a forming processing method of a hollow motor shaft comprises the following steps:
step S1, obtaining a bar meeting the requirements of parts;
step S2, manufacturing the bar into a pipe blank;
step S3, performing primary heat treatment on the pipe blank, and obtaining a pipe material with a required length;
step S4, preprocessing the outer circle of the pipe material;
s5, performing rotary swaging on the tube stock to obtain a variable-diameter multi-step hollow rotor shaft blank;
step S6, carrying out one-time machining on the hollow rotor shaft blank;
step S7, carrying out secondary heat treatment on the hollow rotor shaft blank;
step S8, carrying out secondary machining on the blank of the hollow rotor shaft to form the hollow rotor shaft;
and step S9, carrying out finished product detection on the hollow rotor shaft.
Preferably, in step S2, the step of forming the bar into a tube blank includes performing hot piercing and cold drawing on the bar to form a tube blank with uniform wall thickness, uniform flow line and dense tissue, and the section ratio of the tube blank is greater than or equal to 55%.
Preferably, in step S3, the heat treatment is an isothermal normalizing or annealing process, and the hardness of the obtained tube blank is less than or equal to 220 HB.
Preferably, in step S5, the step of swaging the tube stock includes controlling the temperature to be normal temperature, and controlling a swaging machine to swage the tube stock to form a plurality of variable diameter steps; the pipe material moves along the axial direction, the feeding speed is 2-3mm/s, the rotating speed of a rotary swaging die of the rotary swaging machine is 100-300 revolutions per minute, and the striking force of the rotary swaging die is 200-400 KN.
Preferably, in the step S4, the step of preprocessing the outer circle of the pipe material includes turning or grinding the outer circle, and the inner hole of the pipe material is used as a processing reference to process the outer circle of the pipe material, wherein the dimensional tolerance is ± 0.1, and the form and position tolerance value is less than or equal to 0.2 of the inner hole run-out.
Preferably, in step S6, the step of machining the hollow rotor shaft blank includes machining an outer circle, a step, a relief groove or/and a spline on the hollow rotor shaft blank.
Preferably, in step S7, the step of performing the secondary heat treatment on the hollow rotor shaft blank includes: judging whether the hollow rotor shaft blank is carburized steel, medium carbon steel or medium carbon alloy steel; when the hollow rotor shaft blank is carburized steel, performing carburization on a spline part or a bearing diameter part of the hollow rotor shaft blank; when the hollow rotor shaft blank is medium carbon steel or medium carbon alloy steel, the surface of the spline part or the bearing diameter part of the hollow rotor shaft blank is subjected to induction quenching.
Preferably, in step S8, the step of performing secondary machining on the hollow rotor shaft blank includes grinding a portion of the hollow rotor shaft blank located on the bearing diameter and on which the coil is mounted.
Preferably, in step S9, the finished product inspection includes dynamic balance, flaw detection, and/or physical and chemical inspection.
The invention provides a forming processing method of a hollow motor shaft, which has the following advantages by adopting a combined processing mode of bar pipe making and rotary swaging:
1. by adopting the process steps, the hollow motor shaft meeting the requirements can be processed and manufactured, namely, the wall thickness and the section ratio of the tube blank meet the requirements of the hollow motor shaft, and compared with the traditional processing process, the process steps of the parts are greatly reduced during processing, the processing efficiency is improved, the processing period is shortened, meanwhile, the utilization rate of related materials is improved, the processing cost is saved, and the product competitiveness is improved.
2. The existing part of hollow motor shaft is thin in wall thickness and large in length-diameter ratio, and the length-diameter ratio is about 6-10. The process can be used for manufacturing the tube blank with the performance consistent with that of the traditional cold/warm backward extrusion, reducing and drawing and the like, the tube blank manufactured by the process is not limited to the size of the tube blank with the capacity of the traditional forging and pressing equipment, and the hollow motor shaft manufactured by the process can meet the wall thickness requirement of most of the existing hollow motor shafts.
3. The step hollow shaft with variable diameter and variable thickness can be obtained by performing rotary swaging after primary processing, the requirements of parts on wall thickness and diameter are met, and the structure performance of a processed part can be further improved. Because the core rod and the axial uniform forming, the single-piece die force with small hitting force less than 70 tons, multiple small deformation and other factors, the formed inner hole and the outer circle of the part have high form and position precision, and the formed inner hole can not be processed except the inner hole with the assembly requirement, thereby greatly saving the machining cost and improving the product competitiveness.
4. By adopting the process, raw materials can be saved, the processing efficiency can be improved, the mechanical property of the part can be greatly improved due to the axial distribution of the metal flow lines of the obtained part, and the capability of bearing high rotating speed and alternating load of the hollow motor shaft is met.
Drawings
FIG. 1 is a schematic process flow diagram of a method for forming a hollow motor shaft according to the present invention;
FIG. 2 is a schematic view of a hollow motor shaft according to the present invention;
FIG. 3 is a schematic representation of a space-time tube for calculating aspect ratio in the present invention;
FIG. 4 is a schematic diagram of a cardiovascular tube in calculating a cross-sectional ratio in the present invention.
Reference numbers in the figures: 100. a hollow motor shaft; 110. a hollow bore; 120. a step;
l, the length of the hollow pipe; d. the inner diameter behind the hollow tube; s1, inner hole area; s2, the outer circle area.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the scope of protection of the present invention.
Examples
The invention provides a forming processing method of a hollow motor shaft, which comprises the following steps of:
and step S1, obtaining the bar meeting the part requirement.
Step S2, manufacturing the bar into a pipe blank;
step S3, performing primary heat treatment on the pipe blank, and obtaining a pipe material with a required length;
step S4, preprocessing the outer circle of the pipe material;
s5, performing rotary swaging on the tube stock to obtain a variable-diameter multi-step hollow rotor shaft blank;
step S6, carrying out one-time machining on the hollow rotor shaft blank;
step S7, carrying out secondary heat treatment on the hollow rotor shaft blank;
step S8, carrying out secondary machining on the blank of the hollow rotor shaft to form the hollow rotor shaft;
and step S9, carrying out finished product detection on the hollow rotor shaft.
Specifically, in step S1, the step of obtaining the bar meeting the requirement of the part includes inspecting the chemical composition, the structure, the mechanical properties, and the defects of the material, verifying whether the material meets the requirement of the part, and selecting the required bar according to the verification result.
In step S2, the rod is formed into a billet. The method comprises the specific steps of carrying out hot perforation and cold drawing processing on a bar material to form a tube blank with uniform wall thickness, consistent streamline and compact structure, wherein the section ratio of the tube blank is more than or equal to 55%. Compared with the traditional process for forming the pipe blank, the process for manufacturing the pipe blank avoids multiple heat treatment, surface treatment and lubrication treatment of the pipe blank, is simpler and cleaner in process and relatively lower in cost, and can effectively improve the constraint of thermoplastic forming limit in hot-piercing pipe forming and efficiently manufacture the pipe.
In step S3, performing primary heat treatment on the pipe blank, and obtaining a pipe material with a required length; wherein, the heat treatment adopts an isothermal normalizing or annealing process and is mainly used for improving the plasticity and the structure of the pipe blank so as to meet the performance requirement of rotary forging. Specifically, the structure of the pipe blank after heat treatment is ferrite and pearlite, and the hardness of the pipe blank is less than or equal to 220 HB. The pipe blank can be cut off by using a circular saw or a band saw or other methods to obtain the pipe material with the required length.
In step S4, a preprocessing process is performed on the outer circle of the tube material. The method specifically comprises turning or cylindrical grinding. During processing, the inner hole of the pipe material is used as a processing reference, the excircle of the pipe material is processed, the dimensional tolerance after processing is +/-0.1, and the form and position tolerance value is less than or equal to 0.2 relative to the inner hole run-out. By adopting the process steps, the precision of the pipe material can be optimized, and the inner hole is not processed and paved when the subsequent rotary swaging is carried out. Generally, the inner hole of the motor shaft has a plurality of variable-diameter steps, the requirement on equipment and tools for machining the inner hole is high, and machining efficiency is low. Therefore, the machining mode is adopted to prepare for the subsequent inner hole machining.
In step S5, the swaging process includes: firstly, controlling the temperature to be normal temperature, and controlling a rotary swaging machine to carry out rotary swaging on a pipe material to form a plurality of variable-diameter steps. During specific processing, the pipe material moves along the axial direction, the feeding speed is 2-3mm/s, the rotating speed of a rotary swaging die of a rotary swaging machine is 100-300 revolutions per minute, and the striking force of the rotary swaging die is 200-400 KN. When in processing, the rotary forging die of the section selector carries out rotary forging processing on the tube stock in a high-frequency and small-feed mode, hits a hollow blank, can process the blank with the wall thickness of 4-10mm and the section ratio of more than or equal to 55 percent, can obtain steps with variable diameters and variable thicknesses, meets the requirements of parts on the wall thickness and the diameter, and can further improve the tissue performance of a processing part through rotary forging. And secondly, because the blank is uniformly formed and the previous process assists in processing, the inner hole and the excircle of the formed hollow rotor shaft blank have high form and position precision, and the inner hole of the formed hollow rotor shaft blank except the inner hole required by assembly can be completely processed without additional processing, thereby greatly saving the machining cost and improving the product competitiveness.
If the variable-diameter multi-step hollow rotor shaft is obtained by a machining mode only by adopting a solid forging stock in the traditional process, the mode wastes materials, has high requirements on machining, has high overall machining cost and low competitiveness. And through the rotary swaging processing mode, have the characteristics that improve the tissue compactness, make the metal streamline along axial distribution and hole and excircle have high accuracy, efficient and practice thrift the cost, have apparent competitive advantage.
In step S6, the hollow rotor shaft blank is machined once, specifically including machining the outer circle, the step, the tool withdrawal groove or/and the spline of the hollow rotor shaft blank.
In step S7, the hollow rotor shaft blank is subjected to a secondary heat treatment, which includes the following steps:
firstly, judging whether the hollow rotor shaft blank is carburizing steel, medium carbon steel or medium carbon alloy steel, and selecting different processing modes according to different materials. When the hollow rotor shaft blank is carburized steel, performing carburization on a spline part or a bearing diameter part of the hollow rotor shaft blank; when the hollow rotor shaft blank is medium carbon steel or medium carbon alloy steel, the surface of the spline part or the bearing diameter part of the hollow rotor shaft blank is subjected to induction quenching. The processed hollow rotor shaft blank can meet the performance requirements of parts.
In step S8, the hollow rotor shaft blank is machined for the second time, specifically, the machining includes grinding the bearing diameter and the coil mounting portion of the hollow rotor shaft blank. Through the grinding craftsman, make bearing warp position and installation coil portion have higher precision, make it satisfy the dimensional requirement of part.
In step S9, the finished product inspection includes dynamic balance, flaw detection and/or physical and chemical inspection, and determines whether the part meets the part requirements by detecting key characteristics of the part.
The invention provides a forming processing method of a hollow motor shaft, which has the following advantages by adopting a combined processing mode of bar pipe making and rotary swaging:
1. by adopting the process steps, the hollow motor shaft meeting the requirements can be processed and manufactured, namely, the wall thickness and the section ratio of the tube blank meet the requirements of the hollow motor shaft, and compared with the traditional processing process, the process steps of the parts are greatly reduced during processing, the processing efficiency is improved, the processing period is shortened, meanwhile, the utilization rate of related materials is improved, the processing cost is saved, and the product competitiveness is improved.
2. The existing part of hollow motor shaft is thin in wall thickness and large in length-diameter ratio, and the length-diameter ratio is about 6-10. The process can be used for manufacturing the tube blank with the performance consistent with that of the traditional cold/warm backward extrusion, reducing and drawing and the like, the tube blank manufactured by the process is not limited to the size of the tube blank with the capacity of the traditional forging and pressing equipment, and the hollow motor shaft manufactured by the process can meet the wall thickness requirement of most of the existing hollow motor shafts.
3. The step hollow shaft with variable diameter and variable thickness can be obtained by performing rotary swaging after primary processing, the requirements of parts on wall thickness and diameter are met, and the structure performance of a processed part can be further improved. Because the core rod and the axial uniform forming, the single-piece die force with small hitting force less than 70 tons, multiple small deformation and other factors, the formed inner hole and the outer circle of the part have high form and position precision, and the formed inner hole can not be processed except the inner hole with the assembly requirement, thereby greatly saving the machining cost and improving the product competitiveness.
4. By adopting the process, raw materials can be saved, the processing efficiency can be improved, the mechanical property of the part can be greatly improved due to the axial distribution of the metal flow lines of the obtained part, and the capability of bearing high rotating speed and alternating load of the hollow motor shaft is met.
In order to better understand the present invention, the hollow motor shaft 100 of the prior art, as shown in fig. 2, has a hollow hole 110 formed therein and a plurality of steps 120 having different diameters formed therein.
As shown in fig. 3, the aspect ratio described in the document is equal to L/d, where L is the tube length obtained by folding the weight of the hollow shaft into a hollow tube having the same size as the middle portion, and d is the inner diameter obtained by folding the hollow tube having the same size as the middle portion.
As shown in fig. 4, the section ratio described in the document is the ratio of the inner hole area S1 to the outer circle area S2, i.e., S1/S2.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "connected" are used broadly and can be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, and communicated between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases by those skilled in the art. The embodiments and features of the embodiments of the invention may be combined with each other without conflict.
The above-mentioned embodiments only express the embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A forming processing method of a hollow motor shaft is characterized in that: the method comprises the following steps:
step S1, obtaining a bar meeting the requirements of parts;
step S2, manufacturing the bar into a pipe blank;
step S3, performing primary heat treatment on the pipe blank, and obtaining a pipe material with a required length;
step S4, preprocessing the outer circle of the pipe material;
s5, performing rotary swaging on the tube stock to obtain a variable-diameter multi-step hollow rotor shaft blank;
step S6, carrying out one-time machining on the hollow rotor shaft blank;
step S7, carrying out secondary heat treatment on the hollow rotor shaft blank;
step S8, carrying out secondary machining on the blank of the hollow rotor shaft to form the hollow rotor shaft;
and step S9, carrying out finished product detection on the hollow rotor shaft.
2. The method of claim 1, wherein the step of forming the hollow motor shaft includes: in the step S2, the step of making the bar into a tube blank includes performing hot piercing and cold drawing on the bar to form a tube blank with uniform wall thickness, consistent flow line and dense tissue, and the section ratio of the tube blank is greater than or equal to 55%.
3. The method of claim 1, wherein the step of forming the hollow motor shaft includes: in the step S3, an isothermal normalizing or annealing process is used for the heat treatment, and the hardness of the obtained tube blank is less than or equal to 220 HB.
4. The method of claim 1, wherein the step of forming the hollow motor shaft includes: in the step S5, the step of swaging the tube material includes controlling the temperature to be normal temperature, and controlling a swaging machine to swage the tube material to form a plurality of variable diameter steps; the pipe material moves along the axial direction, the feeding speed is 2-3mm/s, the rotating speed of a rotary swaging die of the rotary swaging machine is 100-300 revolutions per minute, and the striking force of the rotary swaging die is 200-400 KN.
5. The method of claim 1, wherein the step of forming the hollow motor shaft includes: in step S4, the step of preprocessing the outer circle of the pipe material comprises turning or grinding the outer circle, the outer circle of the pipe material is processed by taking the inner hole of the pipe material as a processing reference, the dimensional tolerance is +/-0.1, and the form and position tolerance value is less than or equal to 0.2 relative to the inner hole run-out.
6. The method of claim 1, wherein the step of forming the hollow motor shaft includes: in step S6, the step of machining the hollow rotor shaft blank includes machining an outer circle, a step, a tool withdrawal groove or/and a spline on the hollow rotor shaft blank.
7. The method of claim 1, wherein the step of forming the hollow motor shaft includes: in step S7, the step of performing the secondary heat treatment on the hollow rotor shaft blank includes:
judging whether the hollow rotor shaft blank is carburized steel, medium carbon steel or medium carbon alloy steel;
when the hollow rotor shaft blank is carburized steel, performing carburization on a spline part or a bearing diameter part of the hollow rotor shaft blank;
when the hollow rotor shaft blank is medium carbon steel or medium carbon alloy steel, the surface of the spline part or the bearing diameter part of the hollow rotor shaft blank is subjected to induction quenching.
8. The method of claim 1, wherein the step of forming the hollow motor shaft includes: in step S8, the step of performing secondary machining on the hollow rotor shaft blank includes grinding a portion of the hollow rotor shaft blank, which is located on the bearing diameter and on which the coil is mounted.
9. The method of claim 1, wherein the step of forming the hollow motor shaft includes: in step S9, the finished product inspection includes dynamic balance inspection, flaw detection and/or physical and chemical inspection.
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| CN202110365191.1A CN113477857B (en) | 2021-04-06 | 2021-04-06 | Forming processing method of hollow motor shaft |
| PCT/CN2022/085346 WO2022213991A1 (en) | 2021-04-06 | 2022-04-06 | Method for forming hollow motor shaft |
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| CN202110365191.1A CN113477857B (en) | 2021-04-06 | 2021-04-06 | Forming processing method of hollow motor shaft |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114101570A (en) * | 2021-12-02 | 2022-03-01 | 江苏攀森智能科技有限公司 | Machining method of motor rotating shaft |
| CN114713751A (en) * | 2022-05-06 | 2022-07-08 | 重庆理工大学 | Extrusion and rotary swaging composite forming process of semi-hollow motor shaft |
| WO2022213991A1 (en) * | 2021-04-06 | 2022-10-13 | 江苏太平洋精锻科技股份有限公司 | Method for forming hollow motor shaft |
| CN117182483A (en) * | 2023-11-02 | 2023-12-08 | 中山迈雷特数控技术有限公司 | Balancing process method for hollow shaft parts |
| WO2024017838A1 (en) * | 2022-07-22 | 2024-01-25 | Thyssenkrupp Steel Europe Ag | Weight- and load-optimized hollow rotor shaft and method for producing same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699102A (en) * | 2012-06-07 | 2012-10-03 | 重庆钢铁(集团)有限责任公司 | Production process method of small-caliber cold-drawing seamless steel tube used for boiler |
| CN103587350A (en) * | 2013-11-26 | 2014-02-19 | 上海纳铁福传动轴有限公司 | Automobile drive shaft and manufacturing method thereof |
| WO2015044120A1 (en) * | 2013-09-25 | 2015-04-02 | Vallourec Deutschland Gmbh | Method for the hot forging of a seamless hollow body of material that is difficult to form, in particular of steel |
| CN109622849A (en) * | 2018-12-28 | 2019-04-16 | 山东泰和能源股份有限公司 | A kind of shaft forgings blind hole is radially swaged forging and radial swaging apparatus |
| CN110900122A (en) * | 2019-11-12 | 2020-03-24 | 武汉科技大学 | Lightweight motor shaft forming method |
| CN111037244A (en) * | 2019-12-10 | 2020-04-21 | 江苏森威精锻有限公司 | Hollow shaft and manufacturing method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015221842A1 (en) * | 2015-11-06 | 2017-05-11 | Volkswagen Aktiengesellschaft | Method for producing a gear shaft |
| CN111318863A (en) * | 2020-03-05 | 2020-06-23 | 湖北隐冠轴业有限公司 | Method for processing hollow rotating shaft of driving motor |
| CN112238205A (en) * | 2020-09-17 | 2021-01-19 | 东风商用车有限公司 | Manufacturing method of heavy-duty automobile hollow half shaft and hollow half shaft |
| CN113477857B (en) * | 2021-04-06 | 2022-11-08 | 江苏太平洋精锻科技股份有限公司 | Forming processing method of hollow motor shaft |
| CN113084467A (en) * | 2021-04-06 | 2021-07-09 | 江苏太平洋精锻科技股份有限公司 | Forming processing method of blind hole hollow motor shaft |
-
2021
- 2021-04-06 CN CN202110365191.1A patent/CN113477857B/en active Active
-
2022
- 2022-04-06 WO PCT/CN2022/085346 patent/WO2022213991A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699102A (en) * | 2012-06-07 | 2012-10-03 | 重庆钢铁(集团)有限责任公司 | Production process method of small-caliber cold-drawing seamless steel tube used for boiler |
| WO2015044120A1 (en) * | 2013-09-25 | 2015-04-02 | Vallourec Deutschland Gmbh | Method for the hot forging of a seamless hollow body of material that is difficult to form, in particular of steel |
| CN103587350A (en) * | 2013-11-26 | 2014-02-19 | 上海纳铁福传动轴有限公司 | Automobile drive shaft and manufacturing method thereof |
| CN109622849A (en) * | 2018-12-28 | 2019-04-16 | 山东泰和能源股份有限公司 | A kind of shaft forgings blind hole is radially swaged forging and radial swaging apparatus |
| CN110900122A (en) * | 2019-11-12 | 2020-03-24 | 武汉科技大学 | Lightweight motor shaft forming method |
| CN111037244A (en) * | 2019-12-10 | 2020-04-21 | 江苏森威精锻有限公司 | Hollow shaft and manufacturing method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 杨程等: "空心轴成形技术研究现状", 《锻压技术》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022213991A1 (en) * | 2021-04-06 | 2022-10-13 | 江苏太平洋精锻科技股份有限公司 | Method for forming hollow motor shaft |
| CN114101570A (en) * | 2021-12-02 | 2022-03-01 | 江苏攀森智能科技有限公司 | Machining method of motor rotating shaft |
| CN114713751A (en) * | 2022-05-06 | 2022-07-08 | 重庆理工大学 | Extrusion and rotary swaging composite forming process of semi-hollow motor shaft |
| WO2024017838A1 (en) * | 2022-07-22 | 2024-01-25 | Thyssenkrupp Steel Europe Ag | Weight- and load-optimized hollow rotor shaft and method for producing same |
| CN117182483A (en) * | 2023-11-02 | 2023-12-08 | 中山迈雷特数控技术有限公司 | Balancing process method for hollow shaft parts |
| CN117182483B (en) * | 2023-11-02 | 2024-01-23 | 中山迈雷特数控技术有限公司 | Balancing process method for hollow shaft parts |
Also Published As
| Publication number | Publication date |
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| WO2022213991A1 (en) | 2022-10-13 |
| CN113477857B (en) | 2022-11-08 |
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