CN112157399A - Finish machining process for hub shaft of new energy automobile - Google Patents
Finish machining process for hub shaft of new energy automobile Download PDFInfo
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- CN112157399A CN112157399A CN202010849144.XA CN202010849144A CN112157399A CN 112157399 A CN112157399 A CN 112157399A CN 202010849144 A CN202010849144 A CN 202010849144A CN 112157399 A CN112157399 A CN 112157399A
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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
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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
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/02—Shafts; Axles
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Abstract
The invention discloses a finish machining process for a hub shaft of a new energy automobile, which specifically comprises the following steps: s1, pretreatment processing of the primary blank: the method comprises the steps of selecting an original blank for blanking, cutting the original blank on a sawing machine according to the length of a hub shaft to obtain a primary blank of the hub shaft, chamfering two end faces on the hub shaft, grinding the two end faces of the hub shaft on a plane grinding machine, then placing the hub shaft in a press machine for hot forging, and then annealing by adopting annealing equipment, wherein the annealing conditions are 750 plus one year of temperature and 850 ℃ and the heat preservation time is 2.5-3.5 hours. According to the finishing process of the hub shaft of the new energy automobile, the manufactured hub shaft has the characteristics of high hardness and good toughness through the processing process, meanwhile, the inner surface and the outer surface of the hub shaft are sprayed with the anticorrosive paint, the corrosion resistance effect is achieved, the service life and the overall quality of a hub bearing can be prolonged, and the production cost is low.
Description
Technical Field
The invention relates to the technical field of hub shafts, in particular to a finish machining process for a hub shaft of a new energy automobile.
Background
The hub bearing unit is developed on the basis of standard angular contact ball bearing and tapered roller bearing, and has the advantages of good assembly performance, no need of clearance adjustment, light weight, compact structure, large load capacity, and capability of being filled with lubricating grease in advance for sealing the bearing The automobile hub has the advantages of omitting external hub sealing, avoiding maintenance and the like, is widely applied to cars, and has a trend of gradually expanding application in trucks.
The hub shaft is one of important components of a new energy automobile and needs to bear axial load and radial load, the compressive strength of the existing hub shaft is still to be improved in the processing and manufacturing process of the existing hub shaft, the toughness is relatively low due to insufficient hardness, the hub shaft is easy to break when subjected to axial stress, and meanwhile, the surface of the hub shaft is easy to corrode due to the fact that corrosion resistance treatment is not carried out on the surface of the hub shaft and the influence of external environment is added in the long-term use process, so that the finishing process of the hub shaft of the new energy automobile is provided aiming at the problems.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a finishing process for a hub shaft of a new energy automobile, which solves the problems that the toughness is relatively low due to insufficient hardness in the process of processing and manufacturing the hub shaft, so the hub shaft is easy to break when subjected to axial stress, meanwhile, the surface of the shaft is not subjected to corrosion resistance treatment, and the surface is easy to corrode under the influence of external environment after long-term use.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the invention discloses a new energy automobile hub shaft finish machining process, which can ensure that the manufactured hub shaft has the characteristics of high hardness and good toughness through the machining process, and meanwhile, the inner surface and the outer surface of the hub shaft are sprayed with anticorrosive coatings, so that the corrosion resistance effect is achieved, the service life and the overall quality of a hub bearing can be improved, the production cost is low, and the process specifically comprises the following steps:
s1, pretreatment processing of the primary blank: selecting an original blank for blanking, cutting the original blank on a sawing machine according to the length of the hub shaft to obtain a primary blank of the hub shaft, chamfering two end surfaces on the hub shaft, grinding two end surfaces of the hub shaft on a surface grinding machine, then placing the hub shaft into a press machine for hot forging, then annealing by adopting annealing equipment under the annealing condition of 750 plus one temperature of 850 ℃ for 2.5-3.5h, then softening the hub shaft according to the requirement of a cold extrusion process to obtain a primary blank, the forging process carried out above the metal recrystallization temperature is called hot forging, the hot forging is also called hot die forging, the deformed metal flows violently during forging, the contact time between a forging piece and a die is longer, therefore, the die material is required to have high thermal stability, high-temperature strength and hardness, impact toughness, thermal fatigue resistance and wear resistance and to be convenient to process, and a hot forging die with light working load can be made of low alloy steel;
s2, finishing the hub shaft: the method comprises the following steps of (1) modulating the primary blank obtained in S1, carrying out oil quenching at the temperature of 800-;
s3, preparing an anticorrosive paint and spraying the hub shaft: putting epoxy phenolic anticorrosive paint, a polyurethane material and a polyethylene material into a reaction kettle, uniformly stirring for 50-80min under the condition that the rotating speed is 2000-3000r/min, setting the internal temperature of the reaction kettle to be 250-350 ℃, preparing anticorrosive paint after the reaction is finished, uniformly spraying the anticorrosive paint on the inner surface and the outer surface of the hub shaft by using spraying equipment, then airing at room temperature, and obtaining the high-hardness hub shaft with the anticorrosive property after airing;
s4, final manufacturing of the hub axle and surface treatment: and (4) carrying out grain refinement, tissue adjustment and tissue defect elimination on the hub shaft prepared in the step (S3), then placing the hub shaft in an ultrasonic cleaning machine, starting a switch of an external ultrasonic generator, vibrating an ultrasonic vibration plate in the cleaning machine through the generator, carrying out ultrasonic cleaning on the hub shaft for 30-50min, and finally finishing the whole set of processing steps of the hub shaft after removing the surface adhered impurities.
Preferably, the annealing equipment in the step S1 is an oxygen-free annealing furnace.
Preferably, the preparation process in step S2 is a heat treatment process.
Preferably, the spraying equipment used in step S3 is a high-pressure paint sprayer.
Preferably, the polyethylene in the step S3 is a thermoplastic resin prepared by polymerizing ethylene.
(III) advantageous effects
The invention provides a finish machining process for a hub shaft of a new energy automobile. The method has the following beneficial effects: the finish machining process of the new energy automobile hub shaft comprises the following steps of S1, preprocessing and processing a primary blank: selecting an original blank for blanking, cutting the original blank on a sawing machine according to the length of a hub shaft to obtain a primary blank of the hub shaft, chamfering two end faces on the hub shaft, grinding the two end faces of the hub shaft on a plane grinding machine, then putting the hub shaft into a press machine for hot forging, then annealing by adopting annealing equipment under the annealing conditions of 750 plus materials and 850 ℃ and preserving heat for 2.5-3.5 hours, and then softening the hub shaft according to the cold extrusion process requirement to obtain the primary blank; s2, finishing the hub shaft: the primary blank obtained in the S1 is subjected to modulation treatment, oil quenching at 800-900 ℃ and low-temperature tempering at 180-195 ℃, the hub shaft obtained after low-temperature tempering is placed on a centerless grinding machine, centerless grinding processing is carried out on the inner surface and the outer surface of the hub shaft, then the inner surface and the outer surface of the hub shaft after centerless grinding are both subjected to polishing treatment, then pressure water at 200-320Kpa is used for washing, and airing is carried out for standby application, so that the hub shaft after finish machining can be obtained; s3, preparing an anticorrosive paint and spraying the hub shaft: putting epoxy phenolic anticorrosive paint, a polyurethane material and a polyethylene material into a reaction kettle, uniformly stirring for 50-80min under the condition that the rotating speed is 2000-3000r/min, setting the internal temperature of the reaction kettle to be 250-350 ℃, preparing anticorrosive paint after the reaction is finished, uniformly spraying the anticorrosive paint on the inner surface and the outer surface of the hub shaft by using spraying equipment, then airing at room temperature, and obtaining the high-hardness hub shaft with the anticorrosive property after airing; s4, final manufacturing of the hub axle and surface treatment: the hub shaft prepared in the S3 is subjected to grain refinement, tissue adjustment and tissue defect elimination treatment, then the hub shaft is placed in an ultrasonic cleaning machine, a switch of an external ultrasonic generator is started, an ultrasonic vibration plate in the cleaning machine can be vibrated through the generator, the hub shaft is subjected to ultrasonic cleaning for 30-50min, and after surface adhesion impurities are removed, the whole set of processing steps of the hub shaft are finally completed.
Drawings
FIG. 1 is a flow chart of the architecture of the present invention;
FIG. 2 is a statistical table of comparative data according to the present invention.
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. 1-2, the embodiment of the present invention provides three technical solutions: a finish machining process for a hub shaft of a new energy automobile specifically comprises the following embodiments:
example one
S1, pretreatment processing of the primary blank: selecting an original blank for blanking, cutting the original blank on a sawing machine according to the length of a hub shaft to obtain a primary blank of the hub shaft, chamfering two end faces on the hub shaft, grinding the two end faces of the hub shaft on a plane grinding machine, then putting the hub shaft into a press machine for hot forging, then annealing by adopting annealing equipment, keeping the temperature at 750 ℃ for 2.5 hours, and then softening the hub shaft according to the cold extrusion process requirement to obtain the primary blank;
s2, finishing the hub shaft: the primary blank obtained in the step S1 is subjected to modulation processing, oil quenching at 800 ℃ and low-temperature tempering at 180 ℃, the hub shaft obtained after low-temperature tempering is placed on a centerless grinding machine, centerless grinding processing is carried out on the inner surface and the outer surface of the hub shaft, then the inner surface and the outer surface of the centerless ground hub shaft are both subjected to polishing processing, then pressure water of 200Kpa is used for washing, and airing is carried out for standby application, so that the hub shaft after finish machining is obtained;
s3, preparing an anticorrosive paint and spraying the hub shaft: putting epoxy phenolic anticorrosive paint, a polyurethane material and a polyethylene material into a reaction kettle, uniformly stirring for 50min at the rotating speed of 2000r/min, setting the internal temperature of the reaction kettle to be 250 ℃, preparing anticorrosive paint after the reaction is finished, uniformly spraying the anticorrosive paint on the inner surface and the outer surface of the hub shaft by using spraying equipment, then airing at room temperature, and airing to obtain the high-hardness hub shaft with the anticorrosive property;
s4, final manufacturing of the hub axle and surface treatment: and (4) carrying out grain refinement, tissue adjustment and tissue defect elimination on the hub shaft prepared in the step (S3), then placing the hub shaft in an ultrasonic cleaning machine, starting a switch of an external ultrasonic generator, and vibrating an ultrasonic vibration plate in the cleaning machine through the generator, so that the hub shaft is subjected to ultrasonic cleaning for 30min, and finally finishing the whole set of processing steps of the hub shaft after removing surface adhered impurities.
Example two
S1, pretreatment processing of the primary blank: selecting an original blank for blanking, cutting the original blank on a sawing machine according to the length of a hub shaft to obtain a primary blank of the hub shaft, chamfering two end faces on the hub shaft, grinding the two end faces of the hub shaft on a plane grinding machine, then putting the hub shaft into a press machine for hot forging, then annealing by adopting annealing equipment, keeping the temperature at 800 ℃ for 3 hours, and then softening the hub shaft according to the requirements of a cold extrusion process to obtain the primary blank;
s2, finishing the hub shaft: the primary blank obtained in the step S1 is subjected to modulation processing, oil quenching at 850 ℃ and low-temperature tempering at 190 ℃, the hub shaft obtained after low-temperature tempering is placed on a centerless grinding machine, centerless grinding processing is carried out on the inner surface and the outer surface of the hub shaft, then the inner surface and the outer surface of the hub shaft after centerless grinding are both subjected to polishing processing, then pressure water of 300Kpa is used for washing, and airing is carried out for standby application, so that the hub shaft after finish machining is obtained;
s3, preparing an anticorrosive paint and spraying the hub shaft: putting epoxy phenolic anticorrosive paint, a polyurethane material and a polyethylene material into a reaction kettle, uniformly stirring for 60min at the rotating speed of 2500r/min, setting the internal temperature of the reaction kettle to be 300 ℃, preparing anticorrosive paint after the reaction is finished, uniformly spraying the anticorrosive paint on the inner surface and the outer surface of the hub shaft by using spraying equipment, then airing at room temperature, and airing to obtain the high-hardness hub shaft with the anticorrosive property;
s4, final manufacturing of the hub axle and surface treatment: and (4) carrying out grain refinement, tissue adjustment and tissue defect elimination on the hub shaft prepared in the step (S3), then placing the hub shaft in an ultrasonic cleaning machine, starting a switch of an external ultrasonic generator, and vibrating an ultrasonic vibration plate in the cleaning machine through the generator, so that the hub shaft is subjected to ultrasonic cleaning for 40min, and finally finishing the whole set of processing steps of the hub shaft after removing surface adhered impurities.
EXAMPLE III
S1, pretreatment processing of the primary blank: selecting an original blank for blanking, cutting the original blank on a sawing machine according to the length of a hub shaft to obtain a primary blank of the hub shaft, chamfering two end faces on the hub shaft, grinding the two end faces of the hub shaft on a plane grinding machine, then putting the hub shaft into a press machine for hot forging, then annealing by adopting annealing equipment, keeping the temperature at 850 ℃ for 3.5 hours, and then softening the hub shaft according to the cold extrusion process requirement to obtain the primary blank;
s2, finishing the hub shaft: the primary blank obtained in the step S1 is subjected to modulation processing, oil quenching at 900 ℃ and low-temperature tempering at 195 ℃, the hub shaft obtained after low-temperature tempering is placed on a centerless grinding machine, centerless grinding processing is carried out on the inner surface and the outer surface of the hub shaft, then the inner surface and the outer surface of the hub shaft after centerless grinding are both subjected to polishing processing, then pressure water of 320Kpa is used for washing, and airing is carried out for standby application, so that the hub shaft after finish machining is obtained;
s3, preparing an anticorrosive paint and spraying the hub shaft: putting epoxy phenolic anticorrosive paint, a polyurethane material and a polyethylene material into a reaction kettle, uniformly stirring for 80min at a rotating speed of 3000r/min, setting the internal temperature of the reaction kettle to be 350 ℃, preparing anticorrosive paint after the reaction is finished, uniformly spraying the anticorrosive paint on the inner surface and the outer surface of the hub shaft by using spraying equipment, then airing at room temperature, and airing to obtain the high-hardness hub shaft with the anticorrosive property;
s4, final manufacturing of the hub axle and surface treatment: and (4) carrying out grain refinement, tissue adjustment and tissue defect elimination on the hub shaft prepared in the step (S3), then placing the hub shaft in an ultrasonic cleaning machine, starting a switch of an external ultrasonic generator, and vibrating an ultrasonic vibration plate in the cleaning machine through the generator, so that the hub shaft is subjected to ultrasonic cleaning for 50min, and finally finishing the whole set of processing steps of the hub shaft after removing surface adhered impurities.
Comparative experiment
In a hub shaft production plant, the hub shafts produced in examples 1, 2 and 3 and the hub shafts generally used in the market were subjected to corrosion resistance and hardness testing at the same time and under the same time and conditions, and during the testing, data were counted and a statistical chart was created.
As shown in table 2, the hub shaft processed in the embodiment 1 of the present invention has the characteristics of high hardness and good toughness, and the inner and outer surfaces of the hub shaft are both sprayed with the anticorrosive coating to achieve the effect of corrosion resistance, so that the service life and the overall quality of the hub bearing can be improved, and the production cost is low.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
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 (5)
1. A new energy automobile hub shaft finish machining process is characterized in that: the method specifically comprises the following steps:
s1, pretreatment processing of the primary blank: selecting an original blank for blanking, cutting the original blank on a sawing machine according to the length of a hub shaft to obtain a primary blank of the hub shaft, chamfering two end faces on the hub shaft, grinding the two end faces of the hub shaft on a plane grinding machine, then putting the hub shaft into a press machine for hot forging, then annealing by adopting annealing equipment under the annealing conditions of 750 plus materials and 850 ℃ and preserving heat for 2.5-3.5 hours, and then softening the hub shaft according to the cold extrusion process requirement to obtain the primary blank;
s2, finishing the hub shaft: the primary blank obtained in the S1 is subjected to modulation treatment, oil quenching at 800-900 ℃ and low-temperature tempering at 180-195 ℃, the hub shaft obtained after low-temperature tempering is placed on a centerless grinding machine, centerless grinding processing is carried out on the inner surface and the outer surface of the hub shaft, then the inner surface and the outer surface of the hub shaft after centerless grinding are both subjected to polishing treatment, then pressure water at 200-320Kpa is used for washing, and airing is carried out for standby application, so that the hub shaft after finish machining can be obtained;
s3, preparing an anticorrosive paint and spraying the hub shaft: putting epoxy phenolic anticorrosive paint, a polyurethane material and a polyethylene material into a reaction kettle, uniformly stirring for 50-80min under the condition that the rotating speed is 2000-3000r/min, setting the internal temperature of the reaction kettle to be 250-350 ℃, preparing anticorrosive paint after the reaction is finished, uniformly spraying the anticorrosive paint on the inner surface and the outer surface of the hub shaft by using spraying equipment, then airing at room temperature, and obtaining the high-hardness hub shaft with the anticorrosive property after airing;
s4, final manufacturing of the hub axle and surface treatment: and (4) carrying out grain refinement, tissue adjustment and tissue defect elimination on the hub shaft prepared in the step (S3), then placing the hub shaft in an ultrasonic cleaning machine, starting a switch of an external ultrasonic generator, vibrating an ultrasonic vibration plate in the cleaning machine through the generator, carrying out ultrasonic cleaning on the hub shaft for 30-50min, and finally finishing the whole set of processing steps of the hub shaft after removing the surface adhered impurities.
2. The finishing process of the new energy automobile hub shaft according to claim 1, characterized in that: the annealing equipment in the step S1 is an oxygen-free annealing furnace.
3. The finishing process of the new energy automobile hub shaft according to claim 1, characterized in that: the preparation processing in step S2 is heat treatment processing.
4. The finishing process of the new energy automobile hub shaft according to claim 1, characterized in that: the spraying equipment adopted in the step S3 is a high-pressure paint spraying machine.
5. The finishing process of the new energy automobile hub shaft according to claim 1, characterized in that: the polyethylene in the step S3 is a thermoplastic resin obtained by polymerizing ethylene.
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| CN112157399B CN112157399B (en) | 2022-10-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113175474A (en) * | 2021-03-24 | 2021-07-27 | 江苏建鑫机械制造有限公司 | Automobile hub mandrel and manufacturing method thereof |
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