CN113084467A - Forming processing method of blind hole hollow motor shaft - Google Patents
Forming processing method of blind hole hollow motor shaft Download PDFInfo
- Publication number
- CN113084467A CN113084467A CN202110365221.9A CN202110365221A CN113084467A CN 113084467 A CN113084467 A CN 113084467A CN 202110365221 A CN202110365221 A CN 202110365221A CN 113084467 A CN113084467 A CN 113084467A
- Authority
- CN
- China
- Prior art keywords
- motor shaft
- blind hole
- hollow motor
- hole hollow
- blank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/14—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass gear parts, e.g. gear wheels
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention relates to a forming processing method of a blind hole hollow motor shaft, which belongs to the technical field of precision transmission part processing and comprises the following steps: step S100, processing the sub-part A; step S200, processing a sub-part B; step S300, processing the sub-part A and the sub-part B to form a blind hole hollow motor shaft; wherein, the step S200 and the step of processing the sub-part B comprise the following steps: s210, obtaining a bar meeting the requirements of parts; step S220, manufacturing the bar into a pipe blank; step S230, performing heat treatment on the pipe blank to obtain a pipe material with the length required by the prepared sub-part B; step S240, preprocessing the outer circle of the tube material; s250, performing rotary swaging on the pipe material to obtain a reducing multi-step sub-part B; and step S260, machining the sub-part B. By adopting the process method, the blind hole hollow motor shaft meeting the requirements can be processed and manufactured, the processing procedure of parts is shortened, the processing efficiency is improved, 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 5 and 6.
When a blind hole hollow motor shaft is processed in the prior art, firstly, a raw material is subjected to cold extrusion 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, a plurality of heat treatment, surface treatment and lubricating treatment are required to be carried out on the blank, the steps are various, the processing period is long, the cost is high.
When the finally formed tube blank is processed to form the hollow motor shaft, the tube blank with the cross section ratio larger than 55% and the wall thickness smaller than 55% can not be directly processed in the multiple small-deformation shaping process of the tube blank in the prior art, and the tube blank with the wall thickness of 4-8mm is firstly selected to be used, namely the wall thickness is relatively large, and then the tube wall is processed, so that the cross 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 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 stock 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
The invention aims to provide a forming processing method of a blind hole hollow motor shaft, which can process and manufacture the blind hole hollow motor shaft meeting the requirements, and compared with the traditional processing technology, the processing procedures of parts are greatly reduced during processing, the processing efficiency is improved, the processing period is shortened, the utilization rate of related materials is improved, the processing cost is saved, and the product competitiveness is improved.
In order to achieve the above object, the present invention provides a technical solution as follows:
a forming processing method of a blind hole hollow motor shaft comprises the following steps:
step S100, processing the sub-part A; step S200, processing a sub-part B; step S300, processing the sub-part A and the sub-part B to form a blind hole hollow motor shaft;
wherein, the step S200 and the step of processing the sub-part B comprise the following steps: s210, obtaining a bar meeting the requirements of parts; step S220, manufacturing the bar into a pipe blank; step S230, performing heat treatment on the pipe blank to obtain a pipe material with the length required by the prepared sub-part B; step S240, preprocessing the outer circle of the pipe material; s250, performing rotary swaging on the pipe material to obtain a reducing multi-step sub-part B; and step S260, machining the sub-part B.
Preferably, in the step S220, 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, uniform flow line and dense tissue, and the section ratio of the tube blank is greater than or equal to 55%.
Preferably, in the step S230, in the step of performing heat treatment on the tube blank, the heat treatment adopts an isothermal normalizing or annealing process, and the hardness of the obtained tube blank is less than or equal to 220 HB.
Preferably, in the step S250, 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.
Preferably, in step S240, the step of preprocessing the outer circle of the pipe material includes turning or grinding the outer circle, and the outer circle of the pipe material is processed by using the inner hole of the pipe material as a processing reference, 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, the step S300 of processing the sub-part a and the sub-part B to form the blind hole hollow motor shaft includes: s310, welding the sub-part A and the sub-part B to form a blind hole hollow motor shaft blank; step S320, machining the blind hole hollow motor shaft blank at one time; step S330, performing heat treatment on the blind hole hollow motor shaft blank; and step S340, carrying out secondary machining on the blank of the blind hole hollow motor shaft to form the blind hole hollow motor shaft.
Preferably, in step S320, the step of machining the blind hollow motor shaft blank at one time includes machining an outer circle, a step, a tool withdrawal groove or/and a spline on the hollow rotor shaft blank.
Preferably, in step S330, the step of performing heat treatment on the blind hole hollow motor shaft blank includes: judging whether the blank of the blind hole hollow motor shaft is carburized steel, medium carbon steel or medium carbon alloy steel; when the blind hole hollow motor shaft blank is carburized steel, performing carburization treatment on a spline part or a bearing diameter part of the blind hole hollow motor shaft blank; when the blind hole hollow motor shaft blank is medium carbon steel or medium carbon alloy steel, the surface of the spline part or the bearing diameter part of the blind hole hollow motor shaft blank is subjected to induction quenching.
Preferably, in step S340, the step of performing secondary machining on the blind hole hollow motor shaft blank includes performing grinding on a portion of the blind hole hollow motor shaft blank, which is located on the bearing diameter and on which the coil is mounted.
Preferably, the method further comprises the step S400 of finished product detection, wherein the finished product detection comprises dynamic balance detection, flaw detection and/or physical and chemical detection of the blind hole hollow motor shaft.
The invention provides a forming processing method of a blind hole hollow motor shaft, which processes a sub-part A and a sub-part B respectively and then processes the blind hole hollow motor shaft by welding, and has the following advantages:
1. by adopting the split machining mode, the difficulty of integral machining of the parts is greatly reduced, and the machining mode is suitable for mass production of the parts.
2. Through adopting above-mentioned process steps, can process the blind hole hollow motor shaft that makes up the requirement, pipe embryo wall thickness and cross-section ratio all accord with the hollow motor shaft requirement promptly, and above-mentioned process compares in traditional processing technology, and the manufacturing procedure of the part that significantly reduces when adding man-hour has improved machining efficiency, shortens processing cycle, simultaneously, has improved the utilization ratio of relevant material, practices thrift the processing cost, improves product competitiveness.
3. 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 blind hole hollow motor shaft manufactured by the process can meet the wall thickness requirement of most of the existing blind hole hollow motor shafts.
4. 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-disc 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.
5. 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 forming method of a blind hole hollow motor shaft according to the present invention;
FIG. 2 is a schematic view of a process flow of a protruding step S200 in the forming method of a blind hole hollow motor shaft according to the present invention;
FIG. 3 is a schematic view of a process flow of a protruding step S300 in the forming method of a blind hole hollow motor shaft according to the present invention;
FIG. 4 is a schematic view of a blind hole hollow motor shaft according to the present invention;
FIG. 5 is a schematic representation of a cardiovascular tube when calculating aspect ratio in accordance with the present invention;
FIG. 6 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 sub-part A; 120. a sub-part B; 121. a step; 130. a hollow bore;
l, the length of the hollow pipe; d. the inner diameter behind the hollow tube; s1, inner hole area; s2, 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 protection scope of the present invention.
Examples
The invention provides a forming processing method of a blind hole hollow motor shaft, which comprises the following steps of:
and step S100, machining the sub-part A.
And step S200, machining the sub-part B.
And S300, processing the sub-part A and the sub-part B to form the blind hole hollow motor shaft.
During machining, the sub-part A and the sub-part B are machined respectively, and then the sub-part A and the sub-part B are combined to form the blind hole hollow electronic shaft.
Specifically, in step S100, the sub-part a is an end of the blind-hole hollow motor shaft without a step hole, and the step of processing the sub-part a includes the following steps:
and S110, checking raw materials, and obtaining the materials meeting the requirements of the parts.
And S120, cutting the obtained material to obtain the length required by the machining of the sub-part A, and machining by using a circular saw or a band saw or other tools during cutting.
And step S130, machining and forging the intercepted material to form the sub-part A. The specific forging mode can adopt conventional forging forming, specifically can adopt a warm segment forming process to process the part to 900 ℃, form the part in two stations, the total tonnage is about 350T, and after forming, waste heat is normalized to finally form the sub-part A.
Step S140 is to machine the formed sub-part a so that it can be welded to the sub-part B.
S200, machining the sub-part B, wherein the machining method comprises the following steps:
and S210, obtaining a bar meeting the requirement of the part.
And S220, manufacturing the bar into a pipe blank.
And S230, carrying out heat treatment on the pipe blank, and obtaining a pipe material with the length required by the prepared sub-part B.
And S240, preprocessing the outer circle of the pipe material.
And S250, performing rotary swaging on the pipe material to obtain a reducing multi-step sub-part B.
And step S260, machining the sub-part B.
Specifically, in step S210, the step of obtaining the bar meeting the requirement of the part includes inspecting the chemical composition, the structure, the mechanical property, and the defect 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 S220, the rod is made into a tube blank. 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, the process is simpler, the cost is relatively lower, in addition, the hot-threading pipe forming can effectively improve the constraint of the thermoplastic forming limit, the pipe blank is manufactured with high efficiency, the form and position tolerance of the wall thickness, the inner hole and the excircle of the pipe blank is improved in the cold drawing forming mode of the core-threading rod, the high-precision pipe blank is obtained, and preparation is made for the non-processing of the inner hole of a subsequent finished product.
In step S230, 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 swaging. 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 S240, 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 S250, the tube stock is swaged, specifically including: 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 a pipe material in a high-frequency and small-feed mode, a hollow blank is hit, the blank with the wall thickness of 4-10mm and the section ratio of more than or equal to 55% can be processed, the steps with variable diameters and variable thicknesses can be obtained, the requirements of parts on the wall thickness and the diameter are met, and meanwhile, the structure performance of a processing position can be further improved 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 S260, the sub-part B is machined, specifically, rough and finish machining is performed on the sub-part B in preparation for welding with the sub-part a.
Step S300, processing the sub-part A and the sub-part B to form a blind hole hollow motor shaft, and specifically comprises the following steps:
and S310, welding the sub-part A and the sub-part B to form a blind hole hollow motor shaft blank.
And S320, machining the blind hole hollow motor shaft blank once.
And S330, performing heat treatment on the blind hole hollow motor shaft blank.
And step S340, carrying out secondary machining on the blank of the blind hole hollow motor shaft to form the blind hole hollow motor shaft.
Specifically, step S310, welding the sub-part A and the sub-part B to form a blind hole hollow motor shaft blank; the specific welding mode can adopt modes such as laser welding, friction welding and the like, and welded parts form a whole and integrally meet the requirements of drawings and use. The complex forming process of the blind hole hollow motor shaft can be simplified through the process, the forming process is reduced, the cost is saved, and the product competitiveness is further improved.
And S320, machining the blind hole hollow motor shaft blank once, wherein machining of the outer circle, the step, the tool withdrawal groove or/and the spline of the hollow rotor shaft blank is included.
Step S330, performing heat treatment on the blind hole hollow motor shaft blank; judging whether the blank of the blind hole hollow motor shaft is carburizing steel, medium carbon steel or medium carbon alloy steel; when the blind hole hollow motor shaft blank is carburized steel, performing carburization treatment on a spline part or a bearing diameter part of the blind hole hollow motor shaft blank; when the blind hole hollow motor shaft blank is medium carbon steel or medium carbon alloy steel, the surface of the spline part or the bearing diameter part of the blind hole hollow motor shaft blank is subjected to induction quenching. The blind hole hollow rotor shaft blank after processing can meet the performance requirements of parts.
And S340, performing secondary machining on the blank of the blind hole hollow motor shaft to form the blind hole hollow motor shaft, wherein the step of performing grinding machining on the blank of the blind hole hollow rotor shaft, the part of. Through the grinding craftsman, make bearing warp position and installation coil portion have higher precision, make it satisfy the dimensional requirement of part.
The process method further comprises the step S400 of finished product detection, wherein the finished product detection comprises dynamic balance, flaw detection and/or physical and chemical detection, and whether the part requirements are met or not is judged by detecting the key characteristics of the part.
The invention provides a forming processing method of a blind hole hollow motor shaft, which processes a sub-part A and a sub-part B respectively and then processes the blind hole hollow motor shaft by welding, and has the following advantages:
1. by adopting the split machining mode, the difficulty of integral machining of the parts is greatly reduced, and the machining mode is suitable for mass production of the parts.
2. Through adopting above-mentioned process steps, can process the blind hole hollow motor shaft that makes up the requirement, pipe embryo wall thickness and cross-section ratio all accord with the hollow motor shaft requirement promptly, and above-mentioned process compares in traditional processing technology, and the manufacturing procedure of the part that significantly reduces when adding man-hour has improved machining efficiency, shortens processing cycle, simultaneously, has improved the utilization ratio of relevant material, practices thrift the processing cost, improves product competitiveness.
3. 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 blind hole hollow motor shaft manufactured by the process can meet the wall thickness requirement of most of the existing blind hole hollow motor shafts.
4. 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-disc 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.
5. 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 blind hollow motor shaft 100 according to the present invention, as shown in fig. 4, includes a sub-part a110 and a sub-part B120, the sub-part a110 and the sub-part B120 are hollow holes 130, one end of the sub-part a110 is closed, the other end is welded to the sub-part B120, and a plurality of steps 121 having different diameters are formed inside the sub-part B120.
As shown in fig. 5, 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 tube 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. 6, 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, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not 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 explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, and a communication between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. The embodiments and features of the embodiments of the present invention may be combined with each other without conflict. In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
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 (10)
1. A forming processing method of a blind hole hollow motor shaft is characterized in that: the method comprises the following steps:
step S100, processing the sub-part A;
step S200, processing a sub-part B;
step S300, processing the sub-part A and the sub-part B to form a blind hole hollow motor shaft;
wherein, the step S200 and the step of processing the sub-part B comprise the following steps:
s210, obtaining a bar meeting the requirements of parts;
step S220, manufacturing the bar into a pipe blank;
step S230, performing heat treatment on the pipe blank to obtain a pipe material with the length required by the prepared sub-part B;
step S240, preprocessing the outer circle of the pipe material;
s250, performing rotary swaging on the pipe material to obtain a reducing multi-step sub-part B;
and step S260, machining the sub-part B.
2. The forming processing method of the blind hole hollow motor shaft according to claim 1, characterized in that: in the step S220, the step of manufacturing the bar into a pipe blank comprises the steps of carrying out hot perforation and cold drawing on the bar to form a pipe blank with uniform wall thickness, consistent streamline and compact structure, wherein the section ratio of the pipe blank is more than or equal to 55%.
3. The forming processing method of the blind hole hollow motor shaft according to claim 1, characterized in that: in the step S230, in the step of performing heat treatment on the tube blank, the heat treatment adopts an isothermal normalizing or annealing process, and the hardness of the obtained tube blank is less than or equal to 220 HB.
4. The forming processing method of the blind hole hollow motor shaft according to claim 1, characterized in that: in the step S250, 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 forming processing method of the blind hole hollow motor shaft according to claim 1, characterized in that: in step S240, the step of preprocessing the outer circle of the pipe material includes turning or grinding the outer circle, and the outer circle of the pipe material is processed by using the inner hole of the pipe material as a processing reference, wherein 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 forming processing method of the blind hole hollow motor shaft according to claim 1, characterized in that: the step S300 of processing the sub-part A and the sub-part B to form the blind hole hollow motor shaft comprises the following steps:
s310, welding the sub-part A and the sub-part B to form a blind hole hollow motor shaft blank;
step S320, machining the blind hole hollow motor shaft blank at one time;
step S330, performing heat treatment on the blind hole hollow motor shaft blank;
and step S340, carrying out secondary machining on the blank of the blind hole hollow motor shaft to form the blind hole hollow motor shaft.
7. The forming processing method of the blind hole hollow motor shaft according to claim 6, characterized in that: in the step S320, the blind hole hollow motor shaft blank is machined by one-step machining, which includes machining an outer circle, a step, a tool withdrawal groove or/and a spline on the hollow rotor shaft blank.
8. The forming processing method of the blind hole hollow motor shaft according to claim 6, characterized in that: in step S330, the step of performing heat treatment on the blind hole hollow motor shaft blank includes:
judging whether the blank of the blind hole hollow motor shaft is carburized steel, medium carbon steel or medium carbon alloy steel;
when the blind hole hollow motor shaft blank is carburized steel, performing carburization treatment on a spline part or a bearing diameter part of the blind hole hollow motor shaft blank;
when the blind hole hollow motor shaft blank is medium carbon steel or medium carbon alloy steel, the surface of the spline part or the bearing diameter part of the blind hole hollow motor shaft blank is subjected to induction quenching.
9. The forming processing method of the blind hole hollow motor shaft according to claim 6, characterized in that: in step S340, performing secondary machining on the blind hole hollow motor shaft blank, including performing grinding on the blind hole hollow motor shaft blank and the part located on the bearing diameter and the coil mounting part.
10. The forming processing method of the blind hole hollow motor shaft according to claim 1, characterized in that: the method further comprises the step S400 of finished product detection, wherein the finished product detection comprises dynamic balance detection, flaw detection and/or physical and chemical detection of the blind hole hollow motor shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110365221.9A CN113084467A (en) | 2021-04-06 | 2021-04-06 | Forming processing method of blind hole hollow motor shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110365221.9A CN113084467A (en) | 2021-04-06 | 2021-04-06 | Forming processing method of blind hole hollow motor shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113084467A true CN113084467A (en) | 2021-07-09 |
Family
ID=76673536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110365221.9A Pending CN113084467A (en) | 2021-04-06 | 2021-04-06 | Forming processing method of blind hole hollow motor shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113084467A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113904491A (en) * | 2021-09-26 | 2022-01-07 | 常熟希那基汽车零件有限公司 | New energy blind hole hollow motor shaft and processing method thereof |
| CN114686664A (en) * | 2022-02-28 | 2022-07-01 | 东北大学 | Composite preparation method of high-strength D6A fine-grained steel |
| CN115156846A (en) * | 2022-06-20 | 2022-10-11 | 杭州新坐标科技股份有限公司 | New energy motor rotating shaft with hollow structure and manufacturing method thereof |
| 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 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015077630A (en) * | 2013-10-18 | 2015-04-23 | 株式会社メタルアート | Method for manufacturing motor shaft |
| CN104723045A (en) * | 2015-03-24 | 2015-06-24 | 西安交通大学 | Machining process and tool for shaft with inner step hole with large depth-diameter ratio |
| CN105750846A (en) * | 2016-05-12 | 2016-07-13 | 中国兵器工业第五九研究所 | Quick forming method of low-alloy high-strength steel deep hole component |
| CN106826142A (en) * | 2017-02-21 | 2017-06-13 | 广东科学技术职业学院 | The manufacture method of automobile gearbox jackshaft |
| CN214235874U (en) * | 2020-12-16 | 2021-09-21 | 瑞虹电子（昆山）有限公司 | Electromagnetic shield cover cuts integrative device of punching press |
-
2021
- 2021-04-06 CN CN202110365221.9A patent/CN113084467A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015077630A (en) * | 2013-10-18 | 2015-04-23 | 株式会社メタルアート | Method for manufacturing motor shaft |
| CN104723045A (en) * | 2015-03-24 | 2015-06-24 | 西安交通大学 | Machining process and tool for shaft with inner step hole with large depth-diameter ratio |
| CN105750846A (en) * | 2016-05-12 | 2016-07-13 | 中国兵器工业第五九研究所 | Quick forming method of low-alloy high-strength steel deep hole component |
| CN106826142A (en) * | 2017-02-21 | 2017-06-13 | 广东科学技术职业学院 | The manufacture method of automobile gearbox jackshaft |
| CN214235874U (en) * | 2020-12-16 | 2021-09-21 | 瑞虹电子（昆山）有限公司 | Electromagnetic shield cover cuts integrative device of punching press |
Cited By (5)
| 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 |
| CN113904491A (en) * | 2021-09-26 | 2022-01-07 | 常熟希那基汽车零件有限公司 | New energy blind hole hollow motor shaft and processing method thereof |
| CN114686664A (en) * | 2022-02-28 | 2022-07-01 | 东北大学 | Composite preparation method of high-strength D6A fine-grained steel |
| CN114686664B (en) * | 2022-02-28 | 2023-03-07 | 东北大学 | Composite preparation method of high-strength D6A fine-grained steel |
| CN115156846A (en) * | 2022-06-20 | 2022-10-11 | 杭州新坐标科技股份有限公司 | New energy motor rotating shaft with hollow structure and manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113477857B (en) | Forming processing method of hollow motor shaft | |
| CN113084467A (en) | Forming processing method of blind hole hollow motor shaft | |
| CN102836895B (en) | A kind of manufacture method of special-shaped seamless steel pipe | |
| CN103341735B (en) | Hollow axle and manufacture method thereof | |
| CN101932737B (en) | An axle from a seamless tube for railroad vehicles, and a process for manufacturing an axle from a seamless steel tube for railroad vehicles | |
| CN101695806B (en) | Process for manufacturing backward gear of automobile gearbox | |
| CN102019335B (en) | Cold forging processing method of hardened and tempered structural steel | |
| CN102179681B (en) | Pipe mold manufacturing process adopting continuous-casting blank to forge and roll rough blank periodically | |
| CN103737334B (en) | High-strength gear processing technology | |
| CN103624482B (en) | A kind of forming method of automobile drive axle integral housing | |
| JP4285053B2 (en) | High dimensional accuracy tube and manufacturing method thereof | |
| US20100299925A1 (en) | Method for forming a gear | |
| US20120216590A1 (en) | Method of forming industrial housings | |
| CN111037243B (en) | Manufacturing method of parking gear of gearbox | |
| CN115139066B (en) | Universal joint bell housing processing method | |
| Schmieder et al. | Manufacturing of hollow transmission shafts via bulk-metal forging | |
| CN111037244A (en) | Hollow shaft and manufacturing method thereof | |
| CN106216972A (en) | Extrusion forming process of laughing somebody to scorn spent by a kind of isolator | |
| CN1257029C (en) | Sub-heat control fine forging process for automobile spline shaft | |
| CN105057998B (en) | Automobile DCT automatic transmission II finish forge base preparation method of outer input shaft | |
| KR20190058906A (en) | Manufacturing method of ball cage for constant velocity joint | |
| CN112238205A (en) | Manufacturing method of heavy-duty automobile hollow half shaft and hollow half shaft | |
| CN113399961B (en) | Extrusion forming method for complex external spline part of vehicle multi-order shaft lever | |
| CN111390512B (en) | Non-quenched and tempered steel material for electric drive shaft and production process | |
| CN108273953A (en) | Automobile DCT speed changers input outer shaft deep hole cold forging base forming technology |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210709 |