CN111454493A - Fatigue-resistant gutta-percha spherical hinge for air suspension and preparation method thereof - Google Patents
Fatigue-resistant gutta-percha spherical hinge for air suspension and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a fatigue-resistant gutta-percha spherical hinge for an air suspension, which is prepared from the following basic components in proportion: 50-90 parts of natural rubber, 0-20 parts of isoprene rubber, 0-20 parts of butadiene rubber, 0-20 parts of eucommia rubber, 4-8 parts of zinc oxide, 1-3 parts of stearic acid, 4-10 parts of tackifying resin, 1-10 parts of anti-aging agent, 70-130 parts of carbon black, 0-15 parts of oil, 4.5-6.5 parts of vulcanizing agent, 1-3 parts of accelerator and 0.1-1 part of scorch retarder. The invention has the advantages that: according to the formula of the spherical hinge, a certain amount of eucommia rubber is added to replace part of natural rubber in a spherical hinge rubber material, so that the dynamic fatigue performance of the spherical hinge is improved and the dynamic heat generation of the spherical hinge is reduced on the premise of ensuring the hardness and rigidity of the spherical hinge.
Description
Technical Field
The invention relates to a fatigue-resistant gutta-percha spherical hinge for an air suspension and also relates to a preparation method of the gutta-percha spherical hinge.
Background
Eucommia ulmoides rubber is a natural macromolecular material produced from eucommia ulmoides trees and is distributed in leaves, barks and fruits of the eucommia ulmoides trees. A large number of eucommia ulmoides trees are distributed in northwest areas of China, and therefore China has a large number of eucommia ulmoides gum resources. Eucommia ulmoides rubber and natural rubber are isomerides, and the main component is trans-polyisoprene. Compared with natural rubber, the rubber has the characteristics of good dynamic fatigue property and low heat generation. The gutta-percha partially replaces natural rubber in the air suspension spherical hinge, so that the import dependence of China on the natural rubber can be reduced, and the dynamic fatigue performance of the spherical hinge can be improved.
The spherical hinge is a metal part connecting link in the air suspension and mainly plays a role in damping and isolating vibration. However, in the running process of the automobile, the rubber materials in the spherical hinges are extruded and stretched back and forth by the repeated relative motion between the metal pieces, so that on one hand, a large amount of heat is generated, and the rubber aging is accelerated; dynamic compression and stretching on the other hand lead to rubber material fracture. Therefore, the dynamic fatigue performance of the spherical hinge rubber material is improved, and the method has important significance for improving the quality of the air suspension and the safety of automobile transportation.
However, researches show that the eucommia ulmoides rubber is distributed in the natural rubber in a sheet shape, so that the vulcanized rubber is torn along the surface of a sheet structure in the tearing process, the tearing strength is reduced by 20%, and the fatigue performance of the spherical hinge is reduced.
Disclosure of Invention
The invention aims to provide a fatigue-resistant gutta-percha spherical hinge for an air suspension and a preparation method of the gutta-percha spherical hinge.
In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides an air suspension is with fatigue-resistant gutta percha ball pivot which innovation point lies in: the gutta-percha spherical hinge is prepared from the following basic components in proportion: 50-90 parts of natural rubber, 0-20 parts of isoprene rubber, 0-20 parts of butadiene rubber, 0-20 parts of eucommia rubber, 4-8 parts of zinc oxide, 1-3 parts of stearic acid, 4-10 parts of tackifying resin, 1-10 parts of anti-aging agent, 70-130 parts of carbon black, 0-15 parts of oil, 4.5-6.5 parts of vulcanizing agent, 1-3 parts of accelerator and 0.1-1 part of scorch retarder.
Further, the antioxidant is any one or combination of more of antioxidant ODA, antioxidant 4010NA, antioxidant 4020, antioxidant 4030, antioxidant A, antioxidant AW, antioxidant D, antioxidant RD, antioxidant H and antioxidant B L E.
Further, the carbon black is any one or a combination of more of carbon black N220, carbon black N330, carbon black N339, carbon black N375, carbon black N550, carbon black N660, carbon black N774 and carbon black N762.
Further, the vulcanizing agent is any one or two of vulcanizing agent S and vulcanizing agent DCP.
Further, the promoter is any one or combination of more of promoter CZ, promoter NOBS, promoter DZ, promoter H, promoter D, promoter DOTG, promoter M, promoter DM, promoter TMTD and promoter TAIC.
Further, the scorch retarder is any one of or the combination of the scorch retarder CTP and the scorch retarder E.
Furthermore, the tackifying resin is any one or combination of a plurality of liquid coumarone resin, solid coumarone resin, rosin resin and petroleum resin.
The preparation method of the fatigue-resistant eucommia rubber ball hinge for the air suspension has the innovation points that: the method comprises the following steps:
s1 rubber mixing: placing eucommia rubber in an oven at 75 ℃ for 4-24h, putting natural rubber, butadiene rubber and eucommia rubber into an internal mixer, mixing for 3-5min, adding zinc oxide, stearic acid, an anti-aging agent and a tackifier into the internal mixer, mixing for 1-3min, adding carbon black and oil into the internal mixer, mixing for 1-2min, discharging, standing for 4-24h to obtain a first-stage mixed rubber, adding the first-stage mixed rubber, a vulcanizing agent, an accelerating agent and an anti-scorching agent into the internal mixer, mixing for 3-5min to obtain a second-forging mixed rubber, and thinly passing the second-forging mixed rubber on an open mill for 3-5 times to obtain a rubber sheet with the width of 5 cm;
s2 iron part machining and surface treatment: firstly, processing a ball pin shaft and a check ring according to the drawing requirements, then performing shot blasting on the ball pin shaft and the check ring for 10-30min by using steel shots with the thickness of 0.1-1mm, then performing ultrasonic cleaning on the ball pin shaft and the check ring after shot blasting for 30min, drying after removing oil stains and dust, brushing Kemmoke 205 glue and Kemmoke 252 glue on the surface of the ball pin shaft and the check ring, and standing for later use after 60 min;
s3 injection vulcanization: and placing the check ring and the ball pin shaft into a vulcanization mold, injecting a rubber sheet, vulcanizing for 5-30min at the temperature of 180 ℃ under 150-.
The invention has the advantages that: according to the formula of the spherical hinge, a certain amount of eucommia rubber is added to replace part of natural rubber in a spherical hinge rubber material, so that the dynamic fatigue performance of the spherical hinge is improved and the dynamic heat generation of the spherical hinge is reduced on the premise of ensuring the hardness and rigidity of the spherical hinge.
The formula is adjusted, so that the gutta-percha content is in a certain range, the reduction rate of the tear strength of the rubber composite material is less than 8%, the fatigue performance of the gutta-percha rubber ball hinge is improved, the tear strength of the ball hinge prepared by the formula is more than 32KN/m, the dynamic fatigue life is more than 25 ten thousand times, the dynamic stiffness is attenuated by less than 5%, and the temperature rise in the test process is lower than 10 ℃.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is an overall structure view of a ball joint
Fig. 2 is a sectional view of the ball joint.
FIG. 3 is a graph showing the relationship between the dynamic fatigue performance of the ball hinge and the temperature of the end part and the weight part of the gutta percha in the test process.
FIG. 4 is a graph showing the relationship between the tear strength of vulcanized rubber and the weight of eucommia ulmoides rubber.
Detailed Description
The following examples are presented to enable one of ordinary skill in the art to more fully understand the present invention and are not intended to limit the scope of the embodiments described herein.
Example one
The fatigue-resistant gutta-percha spherical hinge for the air suspension is prepared by the following formula;
the specific preparation method for preparing the spherical hinge by using the formula comprises the following steps:
s1 rubber mixing: placing eucommia rubber in a 75 ℃ oven for 8 hours, putting natural rubber, butadiene rubber and eucommia rubber into an internal mixer, mixing for 4min, adding zinc oxide, stearic acid, an anti-aging agent and a tackifier into the internal mixer, mixing for 2min, adding carbon black and oil into the internal mixer, mixing for 1.5min, discharging and standing for 10 hours to obtain a first-stage mixed rubber, then adding the first-stage mixed rubber, a vulcanizing agent, an accelerant and an anti-scorching agent into the internal mixer, mixing for 4min to obtain a second-forging mixed rubber, and thinly passing the second-forging mixed rubber on an open mill for 5 times to obtain a rubber sheet with the width of 5 cm;
s2 iron part machining and surface treatment: firstly, processing a ball pin shaft and a check ring according to the processing shown in the figures 1 and 2, then carrying out shot blasting on the ball pin shaft and the check ring for 25min by using steel shots with the thickness of 1mm, then carrying out ultrasonic cleaning on the ball pin shaft and the check ring after the shot blasting for 30min, drying the ball pin shaft and the check ring after removing oil stains and dust, brushing Kemlock 205 glue and Kemlock 252 glue on the surfaces of the ball pin shaft and the check ring, and standing for later use after 60 min;
s3 injection vulcanization: and (3) placing the retainer ring and the ball pin shaft into a vulcanization mold, injecting a rubber sheet, vulcanizing for 15min at 175 ℃, taking out a sample, and testing the dynamic performance of the ball hinge after 24 h.
Example two
The fatigue-resistant gutta-percha spherical hinge for the air suspension is prepared by the following formula;
the specific preparation method for preparing the spherical hinge by using the formula comprises the following steps:
s1 rubber mixing: placing eucommia rubber in a 75 ℃ oven for 8 hours, putting natural rubber, butadiene rubber and eucommia rubber into an internal mixer, mixing for 4min, adding zinc oxide, stearic acid, an anti-aging agent and a tackifier into the internal mixer, mixing for 2min, adding carbon black and oil into the internal mixer, mixing for 1.5min, discharging and standing for 10 hours to obtain a first-stage mixed rubber, then adding the first-stage mixed rubber, a vulcanizing agent, an accelerant and an anti-scorching agent into the internal mixer, mixing for 4min to obtain a second-forging mixed rubber, and thinly passing the second-forging mixed rubber on an open mill for 5 times to obtain a rubber sheet with the width of 5 cm;
s2 iron part machining and surface treatment: firstly, processing a ball pin shaft and a check ring according to the drawing requirements, then carrying out shot blasting on the ball pin shaft and the check ring for 25min by using steel shots with the thickness of 1mm, then carrying out ultrasonic cleaning on the ball pin shaft and the check ring after the shot blasting for 30min, removing oil stains and dust, then drying, brushing Kamloko 205 glue and Kamloko 252 glue on the surfaces of the ball pin shaft and the check ring, and standing for later use after 60 min;
s3 injection vulcanization: and (3) placing the retainer ring and the ball pin shaft into a vulcanization mold, injecting a rubber sheet, vulcanizing for 15min at 175 ℃, taking out a sample, and testing the dynamic performance of the ball hinge after 24 h.
EXAMPLE III
The fatigue-resistant gutta-percha spherical hinge for the air suspension is prepared by the following formula;
the specific preparation method for preparing the spherical hinge by using the formula comprises the following steps:
s1 rubber mixing: placing eucommia rubber in a 75 ℃ oven for 8 hours, putting natural rubber, butadiene rubber and eucommia rubber into an internal mixer, mixing for 4min, adding zinc oxide, stearic acid, an anti-aging agent and a tackifier into the internal mixer, mixing for 2min, adding carbon black and oil into the internal mixer, mixing for 1.5min, discharging and standing for 10 hours to obtain a first-stage mixed rubber, then adding the first-stage mixed rubber, a vulcanizing agent, an accelerant and an anti-scorching agent into the internal mixer, mixing for 4min to obtain a second-forging mixed rubber, and thinly passing the second-forging mixed rubber on an open mill for 5 times to obtain a rubber sheet with the width of 5 cm;
s2 iron part machining and surface treatment: firstly, processing a ball pin shaft and a check ring according to the processing shown in the figures 1 and 2, then carrying out shot blasting on the ball pin shaft and the check ring for 25min by using steel shots with the thickness of 1mm, then carrying out ultrasonic cleaning on the ball pin shaft and the check ring after the shot blasting for 30min, drying the ball pin shaft and the check ring after removing oil stains and dust, brushing Kemlock 205 glue and Kemlock 252 glue on the surfaces of the ball pin shaft and the check ring, and standing for later use after 60 min;
s3 injection vulcanization: and (3) placing the retainer ring and the ball pin shaft into a vulcanization mold, injecting a rubber sheet, vulcanizing for 15min at 175 ℃, taking out a sample, and testing the dynamic performance of the ball hinge after 24 h.
Example four
The fatigue-resistant gutta-percha spherical hinge for the air suspension is prepared by the following formula;
the specific preparation method for preparing the spherical hinge by using the formula comprises the following steps:
s1 rubber mixing: placing eucommia rubber in a 75 ℃ oven for 8 hours, putting natural rubber, butadiene rubber and eucommia rubber into an internal mixer, mixing for 4min, adding zinc oxide, stearic acid, an anti-aging agent and a tackifier into the internal mixer, mixing for 2min, adding carbon black and oil into the internal mixer, mixing for 1.5min, discharging and standing for 10 hours to obtain a first-stage mixed rubber, then adding the first-stage mixed rubber, a vulcanizing agent, an accelerant and an anti-scorching agent into the internal mixer, mixing for 4min to obtain a second-forging mixed rubber, and thinly passing the second-forging mixed rubber on an open mill for 5 times to obtain a rubber sheet with the width of 5 cm;
s2 iron part machining and surface treatment: firstly, processing a ball pin shaft and a check ring according to the processing shown in the figures 1 and 2, then carrying out shot blasting on the ball pin shaft and the check ring for 25min by using steel shots with the thickness of 1mm, then carrying out ultrasonic cleaning on the ball pin shaft and the check ring after the shot blasting for 30min, drying the ball pin shaft and the check ring after removing oil stains and dust, brushing Kemlock 205 glue and Kemlock 252 glue on the surfaces of the ball pin shaft and the check ring, and standing for later use after 60 min;
s3 injection vulcanization: and (3) placing the retainer ring and the ball pin shaft into a vulcanization mold, injecting a rubber sheet, vulcanizing for 15min at 175 ℃, taking out a sample, and testing the dynamic performance of the ball hinge after 24 h.
EXAMPLE five
The fatigue-resistant gutta-percha spherical hinge for the air suspension is prepared by the following formula;
the specific preparation method for preparing the spherical hinge by using the formula comprises the following steps:
s1 rubber mixing: placing eucommia rubber in a 75 ℃ oven for 8 hours, putting natural rubber, butadiene rubber and eucommia rubber into an internal mixer, mixing for 4min, adding zinc oxide, stearic acid, an anti-aging agent and a tackifier into the internal mixer, mixing for 2min, adding carbon black and oil into the internal mixer, mixing for 1.5min, discharging and standing for 10 hours to obtain a first-stage mixed rubber, then adding the first-stage mixed rubber, a vulcanizing agent, an accelerant and an anti-scorching agent into the internal mixer, mixing for 4min to obtain a second-forging mixed rubber, and thinly passing the second-forging mixed rubber on an open mill for 5 times to obtain a rubber sheet with the width of 5 cm;
s2 iron part machining and surface treatment: firstly, processing a ball pin shaft and a check ring according to the processing shown in the figures 1 and 2, then carrying out shot blasting on the ball pin shaft and the check ring for 25min by using steel shots with the thickness of 1mm, then carrying out ultrasonic cleaning on the ball pin shaft and the check ring after the shot blasting for 30min, drying the ball pin shaft and the check ring after removing oil stains and dust, brushing Kemlock 205 glue and Kemlock 252 glue on the surfaces of the ball pin shaft and the check ring, and standing for later use after 60 min;
s3 injection vulcanization: and (3) placing the retainer ring and the ball pin shaft into a vulcanization mold, injecting a rubber sheet, vulcanizing for 15min at 175 ℃, taking out a sample, and testing the dynamic performance of the ball hinge after 24 h.
Table 1 is a table comparing the properties of the ball joints prepared in the five examples:
TABLE 1
As can be seen from the comparison of the data in the table, the ball hinge prepared by the formula and the public push has the advantages that the content of the eucommia rubber is within the range of 5-15 parts by weight, the tear strength is more than 37KN/m, the reduction rate of the tear strength is less than 7%, the dynamic fatigue life is more than 25 ten thousand times, and the dynamic stiffness attenuation is less than 8%. The dynamic fatigue test is carried out at the initial test temperature of 23 ℃, the temperature rise in the test process is less than or equal to 15 ℃, and the problems of accelerated aging of rubber caused by a large amount of heat generated by repeated relative motion between metal pieces and breakage of a rubber material caused by dynamic compression and stretching in the running process of an automobile can be well solved.
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 (8)
1. The utility model provides an air suspension is with tired gutta percha ball pivot which characterized in that: the gutta-percha spherical hinge is prepared from the following basic components in proportion: 50-90 parts of natural rubber, 0-20 parts of isoprene rubber, 0-20 parts of butadiene rubber, 0-20 parts of eucommia rubber, 4-8 parts of zinc oxide, 1-3 parts of stearic acid, 4-10 parts of tackifying resin, 1-10 parts of anti-aging agent, 70-130 parts of carbon black, 0-15 parts of oil, 4.5-6.5 parts of vulcanizing agent, 1-3 parts of accelerator and 0.1-1 part of scorch retarder.
2. The fatigue-resistant eucommia ulmoides rubber ball hinge for an air suspension according to claim 1, wherein the antioxidant is one or a combination of more of antioxidant ODA, antioxidant 4010NA, antioxidant 4020, antioxidant 4030, antioxidant A, antioxidant AW, antioxidant D, antioxidant RD, antioxidant H and antioxidant B L E.
3. The fatigue-resistant gutta percha ball hinge for an air suspension as claimed in claim 1, wherein: the carbon black is one or a combination of more of carbon black N220, carbon black N330, carbon black N339, carbon black N375, carbon black N550, carbon black N660, carbon black N774 and carbon black N762.
4. The fatigue-resistant gutta percha ball hinge for an air suspension as claimed in claim 1, wherein: the vulcanizing agent is any one or the combination of two of vulcanizing agent S and vulcanizing agent DCP.
5. The fatigue-resistant gutta percha ball hinge for an air suspension as claimed in claim 1, wherein: the promoter is any one or combination of more of promoter CZ, promoter NOBS, promoter DZ, promoter H, promoter D, promoter DOTG, promoter M, promoter DM, promoter TMTD and promoter TAIC.
6. The fatigue-resistant gutta percha ball hinge for an air suspension as claimed in claim 1, wherein: the scorch retarder is any one or the combination of the scorch retarder CTP and the scorch retarder E.
7. The fatigue-resistant gutta percha ball hinge for an air suspension as claimed in claim 1, wherein: the tackifying resin is any one or combination of a plurality of liquid coumarone resin, solid coumarone resin, rosin resin and petroleum resin.
8. A preparation method of an anti-fatigue eucommia rubber ball hinge for an air suspension is characterized by comprising the following steps: the method comprises the following steps:
s1 rubber mixing: placing eucommia rubber in an oven at 75 ℃ for 4-24h, putting natural rubber, butadiene rubber and eucommia rubber into an internal mixer, mixing for 3-5min, adding zinc oxide, stearic acid, an anti-aging agent and a tackifier into the internal mixer, mixing for 1-3min, adding carbon black and oil into the internal mixer, mixing for 1-2min, discharging, standing for 4-24h to obtain a first-stage mixed rubber, adding the first-stage mixed rubber, a vulcanizing agent, an accelerating agent and an anti-scorching agent into the internal mixer, mixing for 3-5min to obtain a second-forging mixed rubber, and thinly passing the second-forging mixed rubber on an open mill for 3-5 times to obtain a rubber sheet with the width of 5 cm;
s2 iron part machining and surface treatment: firstly, processing a ball pin shaft and a check ring according to the drawing requirements, then performing shot blasting on the ball pin shaft and the check ring for 10-30min by using steel shots with the thickness of 0.1-1mm, then performing ultrasonic cleaning on the ball pin shaft and the check ring after shot blasting for 30min, drying after removing oil stains and dust, brushing Kemmoke 205 glue and Kemmoke 252 glue on the surface of the ball pin shaft and the check ring, and standing for later use after 60 min;
s3 injection vulcanization: and placing the check ring and the ball pin shaft into a vulcanization mold, injecting a rubber sheet, vulcanizing for 5-30min at the temperature of 180 ℃ under 150-.
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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CN112935711A (en) * | 2021-01-26 | 2021-06-11 | 安徽中鼎减震橡胶技术有限公司 | Machining process of ball pin for automobile |
CN113459750A (en) * | 2021-08-06 | 2021-10-01 | 江苏汤臣汽车零部件有限公司 | Four-airbag air suspension system |
CN115785538A (en) * | 2022-12-29 | 2023-03-14 | 航天科工(长沙)新材料研究院有限公司 | Fatigue-resistant rubber and preparation method thereof |
CN116102794A (en) * | 2022-09-09 | 2023-05-12 | 广东粤港澳大湾区黄埔材料研究院 | High-modulus high-temperature-resistant dynamic shear fatigue rubber composition for tire and preparation method thereof |
CN117304521A (en) * | 2023-11-28 | 2023-12-29 | 淄博国创中心先进车用材料技术创新中心 | High fatigue-resistant rubber nanocomposite and preparation method and application thereof |
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CN109912857A (en) * | 2019-03-25 | 2019-06-21 | 东风汽车集团有限公司 | A kind of automobile-used rubber material and the preparation method and application thereof |
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Patent Citations (1)
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CN109912857A (en) * | 2019-03-25 | 2019-06-21 | 东风汽车集团有限公司 | A kind of automobile-used rubber material and the preparation method and application thereof |
Cited By (9)
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CN112935711A (en) * | 2021-01-26 | 2021-06-11 | 安徽中鼎减震橡胶技术有限公司 | Machining process of ball pin for automobile |
CN113459750A (en) * | 2021-08-06 | 2021-10-01 | 江苏汤臣汽车零部件有限公司 | Four-airbag air suspension system |
CN113459750B (en) * | 2021-08-06 | 2024-01-23 | 江苏汤臣汽车零部件有限公司 | Four-airbag air suspension system |
CN116102794A (en) * | 2022-09-09 | 2023-05-12 | 广东粤港澳大湾区黄埔材料研究院 | High-modulus high-temperature-resistant dynamic shear fatigue rubber composition for tire and preparation method thereof |
CN116102794B (en) * | 2022-09-09 | 2024-07-26 | 广东粤港澳大湾区黄埔材料研究院 | High-modulus high-temperature-resistant dynamic shear fatigue rubber composition for tire and preparation method thereof |
CN115785538A (en) * | 2022-12-29 | 2023-03-14 | 航天科工(长沙)新材料研究院有限公司 | Fatigue-resistant rubber and preparation method thereof |
CN115785538B (en) * | 2022-12-29 | 2024-06-21 | 航天科工(长沙)新材料研究院有限公司 | Fatigue-resistant rubber and preparation method thereof |
CN117304521A (en) * | 2023-11-28 | 2023-12-29 | 淄博国创中心先进车用材料技术创新中心 | High fatigue-resistant rubber nanocomposite and preparation method and application thereof |
CN117304521B (en) * | 2023-11-28 | 2024-02-09 | 淄博国创中心先进车用材料技术创新中心 | High fatigue-resistant rubber nanocomposite and preparation method and application thereof |
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Address after: No.8, Jiangfang Road, Changjiang Town, Rugao City, Nantong City, Jiangsu Province, 226500 Applicant after: Jiangsu Huayong composite materials Co.,Ltd. Address before: No.8, Jiangfang Road, Changjiang Town, Rugao City, Nantong City, Jiangsu Province, 226500 Applicant before: Jiangsu Huayong automobile suspension Co.,Ltd. |
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Application publication date: 20200728 |