CN113738766A - Differential double-channel double-protrusion EV hub bearing outer ring and processing method thereof - Google Patents
Differential double-channel double-protrusion EV hub bearing outer ring and processing method thereof Download PDFInfo
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- CN113738766A CN113738766A CN202110974008.8A CN202110974008A CN113738766A CN 113738766 A CN113738766 A CN 113738766A CN 202110974008 A CN202110974008 A CN 202110974008A CN 113738766 A CN113738766 A CN 113738766A
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- 238000003672 processing method Methods 0.000 title claims abstract description 9
- 238000013461 design Methods 0.000 claims abstract description 17
- 238000005242 forging Methods 0.000 claims description 35
- 239000000463 material Substances 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000005097 cold rolling Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 abstract description 5
- 230000002929 anti-fatigue Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
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- 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
- B23P15/003—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass bearings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention discloses a differential double-channel double-protrusion EV hub bearing outer ring and a processing method thereof, wherein the differential double-channel double-protrusion EV hub bearing outer ring comprises the following steps: the outer lane main part, the preceding terminal surface of outer lane main part is provided with the boss, the upper and lower both sides middle part position of boss all is provided with the arch, the mounting hole has all been seted up in the four corners of boss, the screw thread has been seted up to the inside of mounting hole, channel one and channel two have been seted up to the inside of outer lane main part, channel one is close to the front end of outer lane main part, channel two is close to the rear end of outer lane main part. According to the hub bearing, on the premise of not increasing the weight of a product, a double-convex design is added, the assembly identification degree is increased, the assembly efficiency of the whole vehicle is improved, the differential double-channel design is adopted, the static load is ensured to meet the design requirement while the weight is reduced, the circular arc design of the boss and the outer ring main body is increased under the condition that the thickness of the boss is not increased, the number of assembly threads is further increased effectively, and the assembly strength is improved.
Description
Technical Field
The invention relates to the technical field of automobile part processing, in particular to a differential double-channel double-protrusion EV hub bearing outer ring and a processing method thereof.
Background
The EV type is called Electric Vehicle in English, Chinese is translated into an Electric Vehicle, and the Electric Vehicle is a Vehicle which takes a Vehicle-mounted power supply as power and is driven by a motor to run by wheels, and meets various requirements of road traffic and safety regulations. Because the influence on the environment is smaller than that of the traditional automobile, the prospect is widely seen. At present, the light weight of the electric automobile becomes the trend of automobile development. The light weight of the automobile is one of important technical paths for saving energy, reducing consumption and increasing the endurance mileage of the automobile, namely, the light weight of the automobile reduces the preparation quality of the automobile as much as possible on the premise of ensuring the strength and the safety performance of the automobile, thereby improving the dynamic property of the automobile, reducing the fuel consumption and reducing the exhaust pollution. Experiments have shown that the mass of the vehicle is reduced by half and the fuel consumption is reduced by almost half, generally through the improvement of the vehicle parts.
Under the current trend of automobile chassis platformization, one set of wheel hub bearing unit can be used for driving wheels from front to back simultaneously, different positions are assembled with different requirements for the wheel hub unit, the assembly positioning identification degree of the electric automobile wheel hub bearing outer ring is not high, the anti-fatigue life of the electric automobile wheel hub bearing outer ring is low, the thread fit is not tight, the problem of static load is low, and therefore the difference special-shaped double-channel double-protrusion EV wheel hub bearing outer ring with higher practicability and the processing method thereof are provided.
Disclosure of Invention
The invention aims to provide a differential double-channel double-protrusion EV (electric vehicle) hub bearing outer ring and a processing method thereof, which solve the problems that under the current trend of vehicle chassis platformization, one set of hub bearing unit can be simultaneously used for front and rear driving wheels, different positions have different requirements on the assembly of the hub unit, the assembly and positioning identification degree of the hub bearing outer ring of an electric vehicle is not high, the anti-fatigue life of the hub bearing outer ring of the electric vehicle is low, the thread fit is not tight, the static load is low and the like.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a two protruding EV wheel hub bearing inner race of differential type double channel, includes:
the outer lane main part, the preceding terminal surface of outer lane main part is provided with the boss, the upper and lower both sides middle part position of boss all is provided with the arch, the mounting hole has all been seted up in the four corners of boss, the screw thread has been seted up to the inside of mounting hole, channel one and channel two have been seted up to the inside of outer lane main part, channel one is close to the front end of outer lane main part, channel two is close to the rear end of outer lane main part.
Preferably, the outer ring main body, the boss and the protrusion are integrally formed by forging and pressing, and the rear end face of the boss is connected with the outer ring main body by adopting a large arc design.
Preferably, the curvatures and the diameters of the first channel and the second channel are different, and the included angle between the streamline of the first channel and the streamline of the second channel and the channel is less than 30 degrees.
A method for processing a differential double-channel double-protrusion EV hub bearing outer ring comprises the following steps:
s1, sawing a bar stock: cutting the blank from the round bar steel by a circular sawing machine, wherein the cut blank is in a round cake shape;
s2, heating: heating the blank obtained in the step S1 in an intermediate frequency induction heating electric furnace;
s3, forging and pressing: upsetting the blank obtained in the step S2 by using a hot die forging press to form an upset material, then placing the upset material in a preforging die and a preforging die, performing preforging by using the hot die forging press to form a preforging material, and performing precision forging on the preforging material by using the hot die forging press to form a precision forging material;
s4, trimming: stamping the precision forging material obtained in the step S3 by using a punch press, and cutting off redundant leftover materials to form a forging;
s5, residual temperature normalizing: placing the forged piece obtained in the step S4 on a speed-adjustable conveying belt, and driving the forged piece to pass through a variable frequency fan through the conveying belt to cool;
s6, performing cold rolling forming on the forged piece obtained in the step S5 through a cold rolling machine;
s7, machining: and (4) drilling the forged piece obtained in the step S6 through a drilling machine, roughly and finely turning the inner end surface and the outer end surface of the forged piece through a lathe, turning a chamfer, and finally polishing the inner surface and the outer surface of the forged piece.
Preferably, the pre-forging die further comprises an upper die and a lower die, a product cavity is arranged between the upper die and the lower die, the product cavity further comprises a first flash cavity, a second flash cavity and a third flash cavity, the first flash cavity is arranged above the outer edge of the product cavity, the second flash cavity is arranged above the outer edge of the first flash cavity, and the third flash cavity is arranged above the outer edge of the second flash cavity.
Preferably, the first flash cavity, the second flash cavity and the third flash cavity are communicated with each other, and the cross section shapes of the first flash cavity, the second flash cavity and the third flash cavity are step-shaped and are communicated with the inner part of the product cavity.
Preferably, the second flash chamber is obliquely arranged, and the length of the second flash chamber is 5 mm.
Preferably, the third flash chamber is higher than the first flash chamber.
Compared with the prior art, the invention has the following beneficial effects:
the hub bearing of the invention adds double convex design, increases assembly identification degree and improves the assembly efficiency of the whole vehicle on the premise of not increasing the weight of the product, and the first channel and the second channel are arranged in a differential double-channel design, the weight is reduced, simultaneously, the traditional double channels with the same curvature and the same channel diameter are improved into a differential design, the double channels with different curvatures and different channel diameters are matched with corresponding steel balls, the static load is ensured to meet the design requirement, under the condition that the thickness of the boss is not increased, the circular arc design of the boss and the outer ring main body is increased, so that the number of assembling threads is effectively increased, the assembling strength is improved, in addition, the included angle between the arranged channel streamline and the channel is limited to be less than 30 degrees, further, stress concentration of the steel balls and the outer ring channel in the running process of the automobile is reduced, failure modes such as cracks and peeling at the channel are reduced, fatigue wear degree is reduced, and the whole service life of the hub bearing unit is prolonged.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a right side view cross-sectional structure of the present invention;
FIG. 3 is a schematic view of an inverted three-dimensional structure according to the present invention;
FIG. 4 is a schematic cross-sectional view of the boss and the mounting hole of the present invention;
FIG. 5 is a schematic diagram of the blocker of the present invention.
In the figure: 1. an outer ring main body; 2. a boss; 3. a protrusion; 4. mounting holes; 5. a thread; 6. a first channel; 7. a second channel; 8. pre-forging die; 81. an upper die; 82. a lower die; 9. a product cavity; 10. a first flash cavity; 11. a second flash cavity; 12. and a third flash chamber.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1-4, a differential type double-channel double-protrusion EV hub bearing outer ring, suitable for a third generation EV hub bearing outer ring, includes: the outer ring main body 1 is provided with a boss 2 on the front end face of the outer ring main body 1, the middle positions of the upper side and the lower side of the boss 2 are respectively provided with a protrusion 3, the design of double protrusions 3 is increased, the assembly identification degree is increased, the assembly efficiency of the whole vehicle is improved, the outer ring main body 1, the boss 2 and the protrusions 3 are integrally forged and formed, the rear end face of the boss 2 is connected with the outer ring main body 1 by adopting a large arc design, under the condition that the thickness of the boss 2 is not increased, the arc design of the boss 2 and the outer ring main body 1 is increased, the number of assembly threads 5 is effectively increased, the assembly strength is improved, the four corners of the boss 2 are respectively provided with a mounting hole 4, the threads 5 are arranged inside the mounting hole 4, the first channel 6 and the second channel 7 are arranged inside the outer ring main body 1, the first channel 6 is close to the front end of the outer ring main body 1, the second channel 7 is close to the rear end of the outer ring main body 1, the first channel 6 and the second channel 7 are arranged as a differential type double channel design, the weight is reduced, meanwhile, the traditional double channels with the same curvature and the same channel diameter are improved into a differential design, the double channels are different in curvature and different in channel diameter and are matched with corresponding steel balls, the static load is guaranteed to meet the design requirement, the curvatures and the channel diameters of the first channel 6 and the second channel 7 are different, the included angle between the streamline of the first channel 6 and the streamline of the second channel 7 and the channel is smaller than 30 degrees, the angle between the set streamline of the channel and the included angle between the channel is limited to be smaller than 30 degrees, the stress concentration between the steel balls and the outer ring channel in the running process of an automobile is reduced, failure modes such as cracking and peeling at the channel are reduced, the fatigue wear degree is reduced, and the overall service life of a hub bearing unit is prolonged.
Referring to fig. 5, a method for processing an outer ring of a differential double-channel double-protrusion EV hub bearing includes the following steps:
s1, sawing a bar stock: cutting the blank from the round bar steel by a circular sawing machine, wherein the cut blank is in a round cake shape;
s2, heating: heating the blank obtained in the step S1 in an intermediate frequency induction heating electric furnace;
s3, forging and pressing: upsetting the blank obtained in the step S2 by using a hot die forging press to form an upset material, then placing the upset material in a preforging die and a preforging die 8, then performing preforging by using the hot die forging press to form a preforging material, and performing precision forging on the preforging material by using the hot die forging press to form a precision forging material;
s4, trimming: stamping the precision forging material obtained in the step S3 by using a punch press, and cutting off redundant leftover materials to form a forging;
s5, residual temperature normalizing: placing the forged piece obtained in the step S4 on a speed-adjustable conveying belt, and driving the forged piece to pass through a variable frequency fan through the conveying belt to cool;
s6, performing cold rolling forming on the forged piece obtained in the step S5 through a cold rolling machine;
s7, machining: and (4) drilling the forged piece obtained in the step S6 through a drilling machine, roughly and finely turning the inner end surface and the outer end surface of the forged piece through a lathe, turning a chamfer, and finally polishing the inner surface and the outer surface of the forged piece.
The pre-forging die 8 further comprises an upper die 81 and a lower die 82, a product cavity 9 is arranged between the upper die 81 and the lower die 82, the product cavity 9 further comprises a first flash cavity 10, a second flash cavity 11 and a third flash cavity 12, the first flash cavity 10, the second flash cavity 11 and the third flash cavity 12 are communicated with each other, the cross sections among the first flash cavity 10, the second flash cavity 11 and the third flash cavity 12 are in a step shape and are communicated with the inside of the product cavity 9, the first flash cavity 10 is arranged above the outer edge of the product cavity 9, the second flash cavity 11 is arranged above the outer edge of the first flash cavity 10, the second flash cavity 11 is obliquely arranged, the length of the second flash cavity 11 is 5mm, the third flash cavity 12 is arranged above the outer edge of the second flash cavity 11, the third flash cavity 12 is higher than the first flash cavity 10, and the semi-open and semi-open flash cavity is designed to block the flow of the flash at a local position in the forging process, the resistance is increased, the metal forming is promoted, the forging defects caused by severe deformation of the forging and too fast metal flow are reduced, the yield of the forging is improved, and the forging and forming of the boss 2 are facilitated.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a two protruding EV wheel hub bearing inner race of differential type double channel which characterized in that includes:
outer lane main part (1), the preceding terminal surface of outer lane main part (1) is provided with boss (2), the upper and lower both sides middle part position of boss (2) all is provided with arch (3), mounting hole (4) have all been seted up in the four corners of boss (2), screw thread (5) have been seted up to the inside of mounting hole (4), channel one (6) and channel two (7) have been seted up to the inside of outer lane main part (1), channel one (6) are close to the front end of outer lane main part (1), channel two (7) are close to the rear end of outer lane main part (1).
2. The differential double-channel double-protrusion EV hub bearing outer ring as claimed in claim 1, wherein the outer ring main body (1), the boss (2) and the protrusion (3) are integrally formed by forging and pressing, and the rear end face of the boss (2) is connected with the outer ring main body (1) by adopting a large arc design.
3. The differential double-channel double-lug EV hub bearing outer ring according to claim 1, characterized in that the curvatures and the channel diameters of the first channel (6) and the second channel (7) are different, and the included angle between the streamline of the first channel (6) and the streamline of the second channel (7) and the channel is less than 30 degrees.
4. The processing method of the differential double-channel double-protrusion EV hub bearing outer ring is characterized by comprising the following steps:
s1, sawing a bar stock: cutting the blank from the round bar steel by a circular sawing machine, wherein the cut blank is in a round cake shape;
s2, heating: heating the blank obtained in the step S1 in an intermediate frequency induction heating electric furnace;
s3, forging and pressing: upsetting the blank obtained in the step S2 by using a hot die forging press to form an upset material, then placing the upset material in a preforging die (8), performing preforging by using the hot die forging press to form a preforging material, and performing precision forging on the preforging material by using the hot die forging press to form a precision forging material;
s4, trimming: stamping the precision forging material obtained in the step S3 by using a punch press, and cutting off redundant leftover materials to form a forging;
s5, residual temperature normalizing: placing the forged piece obtained in the step S4 on a speed-adjustable conveying belt, and driving the forged piece to pass through a variable frequency fan through the conveying belt to cool;
s6, performing cold rolling forming on the forged piece obtained in the step S5 through a cold rolling machine;
s7, machining: and (4) drilling the forged piece obtained in the step S6 through a drilling machine, roughly and finely turning the inner end surface and the outer end surface of the forged piece through a lathe, turning a chamfer, and finally polishing the inner surface and the outer surface of the forged piece.
5. The processing method of the differential double-channel double-lug EV hub bearing outer ring according to claim 4, characterized in that the pre-forging die (8) further comprises an upper die (81) and a lower die (82), a product cavity (9) is arranged between the upper die (81) and the lower die (82), the product cavity (9) further comprises a first flash cavity (10), a second flash cavity (11) and a third flash cavity (12), the first flash cavity (10) is arranged above the outer edge of the product cavity (9), the second flash cavity (11) is arranged above the outer edge of the first flash cavity (10), and the third flash cavity (12) is arranged above the outer edge of the second flash cavity (11).
6. The method for processing the differential double-channel double-lug EV hub bearing outer ring according to claim 5, characterized in that the first flash cavity (10), the second flash cavity (11) and the third flash cavity (12) are communicated with each other, and the cross-sectional shapes among the first flash cavity (10), the second flash cavity (11) and the third flash cavity (12) are step-shaped and communicated with the inside of the product cavity (9).
7. The method for processing the differential double-channel double-lug EV hub bearing outer ring according to claim 5, characterized in that the second flash cavity (11) is obliquely arranged, and the length of the second flash cavity (11) is 5 mm.
8. The differential double-channel double-lug EV hub bearing outer ring and the processing method thereof as claimed in claim 5, characterized in that the third flash cavity (12) is higher than the first flash cavity (10).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110974008.8A CN113738766A (en) | 2021-08-24 | 2021-08-24 | Differential double-channel double-protrusion EV hub bearing outer ring and processing method thereof |
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| CN202110974008.8A CN113738766A (en) | 2021-08-24 | 2021-08-24 | Differential double-channel double-protrusion EV hub bearing outer ring and processing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117161690A (en) * | 2023-09-15 | 2023-12-05 | 浙江万鼎精密科技股份有限公司 | Automobile hub bearing unit ferrule fitting outer ring and manufacturing process thereof |
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| CN108580778A (en) * | 2018-05-18 | 2018-09-28 | 山东大学 | A kind of forging method of thin-walled depth chamber aircraft wheel hub forging part |
| CN108857274A (en) * | 2018-06-14 | 2018-11-23 | 杭州力亿轴承有限公司 | Double channel emery wheel grinds processing method |
| CN109909422A (en) * | 2019-03-25 | 2019-06-21 | 芜湖万联新能源汽车零部件有限公司 | A kind of finish-forging die of automobile hub bearing flange plate outer ring |
| CN110802373A (en) * | 2019-11-16 | 2020-02-18 | 徐州乐泰机电科技有限公司 | Prestress forging method applied to bearing ring |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117161690A (en) * | 2023-09-15 | 2023-12-05 | 浙江万鼎精密科技股份有限公司 | Automobile hub bearing unit ferrule fitting outer ring and manufacturing process thereof |
| CN117161690B (en) * | 2023-09-15 | 2024-06-04 | 浙江万鼎精密科技股份有限公司 | Manufacturing process of outer ring of ferrule fitting of automobile hub bearing unit |
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