CN111304651A - Eccentric shaft surface hardening method - Google Patents
Eccentric shaft surface hardening method Download PDFInfo
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- CN111304651A CN111304651A CN202010195570.6A CN202010195570A CN111304651A CN 111304651 A CN111304651 A CN 111304651A CN 202010195570 A CN202010195570 A CN 202010195570A CN 111304651 A CN111304651 A CN 111304651A
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- eccentric shaft
- suspension
- cleaning
- hardening
- cleaning machine
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/10—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration
- B08B3/12—Cleaning involving contact with liquid with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration by sonic or ultrasonic vibrations
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention discloses a method for hardening the surface of an eccentric shaft, which comprises the following steps: s1, degreasing the surface of the eccentric shaft; s2, preparing suspension powder; s3, mixing the prepared suspension powder with No. 6 extraction solvent oil to form suspension; s4, respectively placing the eccentric shaft in the S1 and the suspension liquid in the S3 into an oil groove, and driving the eccentric shaft to rotate for 1h-2h in the oil groove through an external motor; and S5, taking out the parts after the rotation is finished, cleaning the surface of the eccentric shaft, and drying the surface of the eccentric shaft after the cleaning. According to the invention, various wear-resistant powders are reasonably proportioned, spheroidized, and finally mixed with No. 6 extraction solvent oil, and a stable and compact hardened layer is formed through high-speed rotation and friction, so that the surface hardness of the eccentric shaft is greatly improved.
Description
Technical Field
The invention belongs to the technical field of part surface hardening, and particularly relates to a surface hardening method of an eccentric shaft.
Background
The RV reducer consists of a cycloidal pin wheel and a planet support, and is widely applied to the fields of industrial robots and the like due to the advantages of small size, strong impact resistance, large torque, high positioning precision, small vibration, large reduction ratio and the like. It has high fatigue strength, rigidity and service life, and stable return difference precision.
The eccentric shaft is a core part in the RV reducer, and the quality and the precision of the eccentric shaft have important influence on the return difference of the reducer, so that the transmission precision, the transmission efficiency and the service life of the reducer are directly influenced. Because the eccentric shaft is subjected to severe friction and abrasion and large alternating load, the requirement on the hardness of the material of the eccentric shaft is high, and the surface hardness of the conventional eccentric shaft is low.
Disclosure of Invention
The present invention has been made to solve the above problems, and an object of the present invention is to provide a method for hardening the surface of an eccentric shaft, which can improve the hardness of the surface of the eccentric shaft.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a method of hardening the surface of an eccentric shaft, the hardening method comprising the steps of:
s1, degreasing the surface of the eccentric shaft;
s2, preparing suspension powder;
s3, mixing the prepared suspension powder with No. 6 extraction solvent oil to form suspension;
s4, respectively placing the eccentric shaft in the S1 and the suspension liquid in the S3 into an oil groove, and driving the eccentric shaft to rotate for 1h-2h in the oil groove through an external motor;
and S5, taking out the parts after the rotation is finished, cleaning the surface of the eccentric shaft, and drying the surface of the eccentric shaft after the cleaning.
In a preferred embodiment of the present invention, in S1, the eccentric shaft is first roughly washed to remove oil stains and impurities on the surface of the eccentric shaft, then the roughly washed eccentric shaft is placed in an ultrasonic cleaning machine, the surface of the eccentric shaft is cleaned by the ultrasonic cleaning machine to remove all oil stains on the surface of the eccentric shaft, and the surface of the eccentric shaft is dried after cleaning.
In a preferred embodiment of the invention, kerosene is used for rough washing, after which the surface is wiped dry with a fiber cloth and air-dried for 2-3h, and then cleaned by an ultrasonic cleaning machine.
In a preferred embodiment of the invention, the ultrasonic frequency of the ultrasonic cleaning machine is 28-35kHz, the solution adopted in the cleaning process of the ultrasonic cleaning machine is acetone, the cleaning temperature of the ultrasonic cleaning machine is 50-60 ℃, and the cleaning power density of the ultrasonic cleaning machine is as follows: 0.35-0.38W/cm 2.
In a preferred embodiment of the invention, the eccentric shaft is dried in an electric furnace, the drying temperature: drying at 180-200 ℃ for: 20min-30 min.
In a preferred embodiment of the present invention, in S2, the suspension powder includes: silicon carbide: 9% -11%, alumina: 28% -32%, tungsten carbide: 28% -32%, TiC: 28 to 32 percent.
In a preferred embodiment of the present invention, in S3, the mixed suspension is stirred at a stirring speed of 80 to 100 r/min.
In a preferred embodiment of the invention, 1L to 1.5L6 # extraction solvent oil is mixed per 100g of suspension powder.
In a preferred embodiment of the present invention, in S4, a tool is disposed in the oil tank, the tool is provided with a rotatable grinding head, the grinding head and the eccentric shaft are made of the same material, and a surface of the grinding head is in contact with a surface of the eccentric shaft.
In a preferred embodiment of the present invention, in the step S4, the rotation rate of the external motor is 1500r/min-2500 r/min.
The invention has the beneficial effects that:
according to the invention, various wear-resistant powders are reasonably proportioned, spheroidized, and finally mixed with No. 6 extraction solvent oil, and a stable and compact hardened layer is formed through high-speed rotation and friction, so that the surface hardness of the eccentric shaft is greatly improved.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below.
The invention provides a surface hardening method of an eccentric shaft, which comprises the following steps:
s1, degreasing the surface of the eccentric shaft;
s2, preparing suspension powder;
s3, mixing the prepared suspension powder with No. 6 extraction solvent oil to form suspension;
s4, respectively placing the eccentric shaft in the S1 and the suspension liquid in the S3 into an oil groove, and driving the eccentric shaft to rotate for 1h-2h in the oil groove through an external motor;
and S5, taking out the parts after the rotation is finished, cleaning the surface of the eccentric shaft, and drying the surface of the eccentric shaft after the cleaning.
In the above S1, the eccentric shaft is roughly washed to remove oil stains and impurities on the surface of the eccentric shaft, then the roughly washed eccentric shaft is placed in an ultrasonic cleaning machine, the surface of the eccentric shaft is cleaned by the ultrasonic cleaning machine to remove all oil stains on the surface of the eccentric shaft, and the surface of the eccentric shaft is dried after cleaning.
In the step S1, kerosene is adopted for rough washing, the surface of the coal tar is wiped by fiber cloth after the rough washing, the coal tar is dried for 2 to 3 hours, and then the coal tar is cleaned by an ultrasonic cleaner.
In the above S1, the ultrasonic frequency of the ultrasonic cleaning machine is 28 to 35kHz, and cavitation in the liquid in this frequency range is easy, and a moderate cleaning force can be realized to ensure thorough cleaning.
The solution that adopts in the ultrasonic cleaner cleaning process is acetone, adopts chemical cleaning solvent acetone, can realize the combination of physical action (ultrasonic cleaning) and chemical action, and the cleaning performance accelerates, carries out abundant thorough washing to the part.
The cleaning temperature of the ultrasonic cleaning machine is 50-60 ℃, and the temperature range not only ensures better cavitation effect, but also enhances the activity of a chemical solvent and greatly improves the cleaning effect.
The power density of the ultrasonic cleaning machine is as follows: 0.35-0.38W/cm2, the lower power density is selected because the long time high power density cleaning will cause 'cavitation' on the surface of the parts.
In the above S1, the eccentric shaft is dried in an electric furnace, and the drying temperature is: drying at 180-200 ℃ for: 20min-30 min.
In the above S2, the suspension powder includes: silicon carbide: 9% -11%, alumina: 28% -32%, tungsten carbide: 28% -32%, TiC: 28 to 32 percent, and the balance of inevitable impurities, and the raw materials in parts by weight are mixed in a ball mill and ball-milled for 1.5 to 2 hours to prepare suspension powder, so that the quality of the suspension powder can be improved.
In addition, the particle size of each component is specifically 115-300 meshes.
In the above S3, the mixed suspension is stirred at a stirring speed of 80-100r/min, so that the quality of the suspension can be improved.
When the suspension powder is mixed with No. 6 extraction solvent oil, 1L-1.5L6 extraction solvent oil is mixed for every 100g of suspension powder.
In the above-mentioned S4, set up the frock in the oil groove, be equipped with rotatable bistrique on the frock, bistrique and eccentric shaft adopt the same kind of material, bistrique surface and eccentric shaft surface keep in contact, and the eccentric shaft is still polished through the bistrique when rotatory in suspension like this, through high-speed rotation and friction, forms stable compact sclerosis layer to the surface hardness of eccentric shaft greatly.
In the above step S4, the rotation speed of the external motor is 1500r/min-2500r/min, and the external motor is connected to the eccentric shaft via the rotating shaft.
Based on the implementation of the above scheme, the present application provides the following two examples:
example 1:
the eccentric shaft surface hardening method provided by the embodiment comprises the following steps:
s1: degreasing the surface of an eccentric shaft, cleaning oil stain and sundries on the surface of the eccentric shaft by adopting kerosene, wiping the surface by using fiber cloth, airing for 2 hours, placing the eccentric shaft in an ultrasonic cleaning machine, cleaning the surface of a base body by using the ultrasonic cleaning machine so as to remove the oil stain on the surface of the base body, wherein the ultrasonic frequency is 30kHz, the solution adopted in the cleaning process is acetone, the ultrasonic cleaning temperature is controlled to be 50-55 ℃, the power density of ultrasonic cleaning is 0.35-0.36W/cm2, drying the surface of a part after cleaning, and the part drying process is carried out in an electric furnace at the drying temperature: and (3) drying at 180 ℃ for: 25 min;
s2: preparing suspension powder, wherein the suspension powder consists of the following components in percentage by mass: silicon carbide: 9%, alumina: 31%, tungsten carbide: 32%, TiC: 28 percent, the balance being inevitable impurities, the particle size of each component being 115-300 meshes, placing the raw materials in parts by weight in a ball mill for mixing and ball milling for 1.5 hours to prepare mixed powder;
s3: preparing a suspension, namely mixing the suspension powder prepared in the step S2 with No. 6 extraction solvent oil, mixing 1L of solvent oil in each 100g of suspension powder, and stirring the mixed suspension at the stirring speed of 100r/min in order to fully mix the powder and the solvent oil;
s4: placing the eccentric shaft in an oil tank, installing the eccentric shaft by using a tool assembly in a matching way, respectively customizing the tool according to the size of the eccentric shaft to be processed, wherein the tool is provided with a rotatable grinding head, the grinding head and the eccentric shaft are made of the same material, the surface of the grinding head is kept in contact with the surface of a part, placing the suspension prepared by S3 in the oil tank, driving an external motor to rotate the eccentric shaft for 1.5h, and the rotation rate of the external motor is 2000 r/min;
s5: and after the rotation is finished, taking out the part, cleaning the surface of the part by using an ultrasonic cleaner, and drying the surface of the part after cleaning.
The following are the hardness tests of the three eccentric shafts subjected to surface hardening treatment by the embodiment, and the test results are obtained:
| part number | Hardness before treatment (HRC) | Hardness after treatment (HRC) |
| 1 | 61 | 65 |
| 2 | 59 | 64 |
| 3 | 58 | 62 |
Example 2:
the eccentric shaft surface hardening method provided by the embodiment comprises the following steps:
s1: degreasing the surface of an eccentric shaft, cleaning oil stain and sundries on the surface of the eccentric shaft by adopting kerosene, wiping the surface by using fiber cloth, airing for 3 hours, placing the eccentric shaft in an ultrasonic cleaning machine, cleaning the surface of a base body by using the ultrasonic cleaning machine so as to remove the oil stain on the surface of the base body, wherein the ultrasonic frequency is 35kHz, the solution adopted in the cleaning process is acetone, the ultrasonic cleaning temperature is controlled to be 55-60 ℃, the power density of ultrasonic cleaning is 0.37-0.38W/cm2, drying the surface of a part after cleaning, and the part drying process is carried out in an electric furnace at the drying temperature: drying at 200 ℃ for a drying time: 20 min;
s2: preparing suspension powder, wherein the suspension powder consists of the following components in percentage by mass: silicon carbide: 11%, alumina: 29%, tungsten carbide: 28%, TiC: 32 percent, the balance being inevitable impurities, the particle size of each component being 115-300 meshes, placing the raw materials in parts by weight in a ball mill for mixing and ball milling for 1.5-2h to prepare mixed powder;
s3: preparing a suspension, namely mixing the suspension powder prepared in the step S2 with No. 6 extraction solvent oil, mixing 1.5L of solvent oil in each 100g of suspension powder, and stirring the mixed suspension at the stirring speed of 80r/min in order to fully mix the powder and the solvent oil;
s4: placing the eccentric shaft in an oil tank, installing the eccentric shaft by using a tool assembly in a matching manner, respectively customizing the tool according to the size of the eccentric shaft to be processed, wherein the tool is provided with a rotatable grinding head, the grinding head and the eccentric shaft are made of the same material, the surface of the grinding head is kept in contact with the surface of a part, placing the suspension prepared by S3 in the oil tank, driving an external motor to rotate the eccentric shaft for 2 hours, and the rotation rate of the external motor is 1500 r/min;
s5: and after the rotation is finished, taking out the part, cleaning the surface of the part by using an ultrasonic cleaner, and drying the surface of the part after cleaning.
The following are the hardness tests of the three eccentric shafts subjected to surface hardening treatment by the embodiment, and the test results are obtained:
| part number | Hardness before treatment (HRC) | Hardness after treatment (HRC) |
| 1 | 62 | 67 |
| 2 | 59 | 63 |
| 3 | 63 | 66 |
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A method of hardening the surface of an eccentric shaft, the method comprising the steps of:
s1, degreasing the surface of the eccentric shaft;
s2, preparing suspension powder;
s3, mixing the prepared suspension powder with No. 6 extraction solvent oil to form suspension;
s4, respectively placing the eccentric shaft in the S1 and the suspension liquid in the S3 into an oil groove, and driving the eccentric shaft to rotate for 1h-2h in the oil groove through an external motor;
and S5, taking out the parts after the rotation is finished, cleaning the surface of the eccentric shaft, and drying the surface of the eccentric shaft after the cleaning.
2. The method of claim 1, wherein in step S1, the eccentric shaft is roughly cleaned to remove oil stains and impurities on the surface of the eccentric shaft, the roughly cleaned eccentric shaft is then placed in an ultrasonic cleaning machine, the surface of the eccentric shaft is cleaned by the ultrasonic cleaning machine to remove all oil stains on the surface of the eccentric shaft, and the surface of the eccentric shaft is dried after cleaning.
3. The method for hardening the surface of the eccentric shaft according to claim 2, wherein the rough washing is performed by using kerosene, and after the rough washing, the surface is wiped by using a fiber cloth and dried for 2 to 3 hours, and then the cleaning is performed by using an ultrasonic cleaning machine.
4. The method for hardening the surface of the eccentric shaft according to claim 2 or 3, wherein the ultrasonic frequency of the ultrasonic cleaning machine is 28 to 35kHz, the solution used in the cleaning process of the ultrasonic cleaning machine is acetone, the cleaning temperature of the ultrasonic cleaning machine is 50 to 60 ℃, and the power density of the cleaning of the ultrasonic cleaning machine is as follows: 0.35-0.38W/cm 2.
5. The method for hardening the surface of an eccentric shaft according to claim 2, 3 or 4, wherein the eccentric shaft is dried in an electric furnace at a temperature of: drying at 180-200 ℃ for: 20min-30 min.
6. The method for hardening the surface of an eccentric shaft according to claim 1, wherein in said S2, the suspension powder comprises: silicon carbide: 9% -11%, alumina: 28% -32%, tungsten carbide: 28% -32%, TiC: 28 to 32 percent.
7. The method of claim 1, wherein the mixed suspension is stirred at a speed of 80 to 100r/min in S3.
8. The method for hardening the surface of an eccentric shaft according to claim 1, wherein 1L to 1.5L6 # extraction solvent oil is mixed per 100g of the suspension powder.
9. The method of claim 1, wherein in step S4, the tool is disposed in an oil tank, the tool is provided with a rotatable grinding head, the grinding head and the eccentric shaft are made of the same material, and the surface of the grinding head is in contact with the surface of the eccentric shaft.
10. The method of claim 1, wherein in the step S4, the rotation rate of the external motor is 1500r/min-2500 r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010195570.6A CN111304651A (en) | 2020-03-19 | 2020-03-19 | Eccentric shaft surface hardening method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010195570.6A CN111304651A (en) | 2020-03-19 | 2020-03-19 | Eccentric shaft surface hardening method |
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| CN111304651A true CN111304651A (en) | 2020-06-19 |
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| CN202010195570.6A Pending CN111304651A (en) | 2020-03-19 | 2020-03-19 | Eccentric shaft surface hardening method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2516731A1 (en) * | 1974-04-23 | 1975-11-13 | Jacques Jean Georges Ga Broido | GRINDING OR POLISHING DEVICE |
| CN101068655A (en) * | 2004-08-17 | 2007-11-07 | 昭和电工株式会社 | Method of manufacturing silicon substrates for magnetic recording medium, silicon substrate for magnetic recording medium, magentic recording medium, and magnetic recording apparatus |
| CN201239917Y (en) * | 2008-05-30 | 2009-05-20 | 青岛理工大学 | Polishing device of grinder |
| CN103143881A (en) * | 2013-01-22 | 2013-06-12 | 李辉玲 | Low-resistance rolling polishing method |
| CN107199514A (en) * | 2017-06-07 | 2017-09-26 | 吉林大学 | Superhard material jet polishing method |
| CN109940163A (en) * | 2019-05-15 | 2019-06-28 | 四川大学 | A kind of post-processing approach for strengthening 3D printing metal component surface abrasion resistance |
-
2020
- 2020-03-19 CN CN202010195570.6A patent/CN111304651A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2516731A1 (en) * | 1974-04-23 | 1975-11-13 | Jacques Jean Georges Ga Broido | GRINDING OR POLISHING DEVICE |
| CN101068655A (en) * | 2004-08-17 | 2007-11-07 | 昭和电工株式会社 | Method of manufacturing silicon substrates for magnetic recording medium, silicon substrate for magnetic recording medium, magentic recording medium, and magnetic recording apparatus |
| CN201239917Y (en) * | 2008-05-30 | 2009-05-20 | 青岛理工大学 | Polishing device of grinder |
| CN103143881A (en) * | 2013-01-22 | 2013-06-12 | 李辉玲 | Low-resistance rolling polishing method |
| CN107199514A (en) * | 2017-06-07 | 2017-09-26 | 吉林大学 | Superhard material jet polishing method |
| CN109940163A (en) * | 2019-05-15 | 2019-06-28 | 四川大学 | A kind of post-processing approach for strengthening 3D printing metal component surface abrasion resistance |
Non-Patent Citations (1)
| Title |
|---|
| 邹建新: "《材料科学与工程实验指导教程》", 31 July 2010, 西南交通大学出版社 * |
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Application publication date: 20200619 |
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