CN102729003A - Floating oil seal machining process - Google Patents
Floating oil seal machining process Download PDFInfo
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- CN102729003A CN102729003A CN2012101059889A CN201210105988A CN102729003A CN 102729003 A CN102729003 A CN 102729003A CN 2012101059889 A CN2012101059889 A CN 2012101059889A CN 201210105988 A CN201210105988 A CN 201210105988A CN 102729003 A CN102729003 A CN 102729003A
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Abstract
The invention discloses a floating oil seal machining process, which sequentially comprises the following steps of: performing rubber mold precoated sand modeling, casting, performing shot blasting, checking a blank, grinding, performing quenching heat treatment, performing oil abrasion, cleaning, injecting oil, mounting a rubber ring, checking, packaging, warehousing and the like, wherein molten iron comprises the following components in parts by weight: 18 to 26 parts of Cr, 2.5 to 5.7 parts of Mo, 3.76 to 3.78 parts of Ni, 1.25 to 3.29 parts of Cu, 1.55 to 3.92 parts of Mn, 2.87 to 4.15 parts of Si and 4.88 to 6.12 parts of C. During casting, mold is conveniently withdrawn, one-step casting molding is performed, the waste of the molten iron is reduced, the process of turning the machining allowance of the lathe can be avoided, mass production is convenient, and the cost is reduced; and moreover, the strength, hardness, wear resistance, fatigue strength, heat resistance and toughness of the floating seal ring are greatly improved. According to the finished floating oil seal, various detection indexes exceed over 5 to 10 percent of the standard in the industry, and the floating oil seal is worthy of popularization and application.
Description
Technical field
The present invention relates to a kind of float grease seal production and processing technology.
Background technology
Float grease seal is a kind of non-contact mechanical seal of special shape, is for adapting to the mechanical seal mode of a kind of compact that bad working environment grows up, and it is strong that it has a contamination resistance; Wear-resisting, shock-resistant, reliable operation; End wear compensates automatically, advantages of simple structure and simple.The floating current oil sealing is widely used in fields such as engineering machinery, coal mine machinery, building machinery, petroleum machinery and aviation boats and ships; Wherein application is the most general on construction machinery product, and being included on various conveyers, sand preparing machine, coal mine equipment, the concrete equipment etc. all has application.
The lost-wax casting that traditional mode of production processing float grease seal mainly adopts, its casting accuracy is high, but technology is loaded down with trivial details, complicated operation, and finished casting rate is extremely low, is inappropriate for producing processing in batches.At present existing minority adopts the precoated sand moulding; But the float grease seal inclined-plane is provided with the oblique concave surface of ring-type that is used to load sealing ring; The float grease seal mould is difficult to deviate from, and product can leave certain allowance when casting, solves this problem through lathe turning processing again behind the casting member.Though can realize like this producing in batches, turning adds and produces more waste material man-hour, cause the molten iron utilization rate of foundry goods on the low side, thereby cause the bigger wasting of resources, and this processing method process-cycle is long, the quality instability.In addition, also have at present few part to adopt centre spinning to produce float grease seal, the characteristics of centrifugal casting be molten metal the centrifugal action lower charging type with solidify, the metal feeding is effective, the foundry goods outer tissue is fine and close, non-metallic inclusion is few, good mechanical property; And the revolution of casting mold is the important parameter of centrifugal casting, enough centrifugal force should be arranged to increase the compactness of foundry goods metal, and centrifugal force again can not be too big; In order to avoid hinder the contraction of metal, whole process is controlled loaded down with trivial details, and danger coefficient is high; Must veteran employee just can operate, production capacity is difficult to improve, and; But the ring Free Surface is coarse in the ring-shaped work pieces that centrifugal casting casts out, scale error is big, of poor quality; Increased number of stomata, slag inclusion are arranged, need to exist big allowance, the molten iron waste is still serious.
The sealing principle of float grease seal is: two floating sealing rings receive the distortion after the axial compression by O-ring seals; Generation is to the thrust of floating sealing ring seal face; Along with the uniform wear of seal face, this elastic energy that is stored by O-ring seals progressively discharges, thereby plays the nose balance effect.Therefore, the use of float grease seal is high to wearability, hear resistance, oil resistivity, the sealing requirements of floating sealing ring end face and O-ring seals.At present, float grease seal on the market is in wearability, poor heat resistance, and hardness generally is lower than HRC62～65, and sealing property is not good, and generally be lower than 4500 hours service life, and under the high strength operating condition, uses also fragile.
Therefore, be badly in need of occurring a kind of float grease seal production and processing technology that can improve float grease seal performance and service life and satisfy the present situation demand.
Summary of the invention
The present invention will solve the shortcoming of above-mentioned prior art, and a kind of float grease seal production and processing technology that improves float grease seal performance and service life is provided, and satisfies the mechanical seal industry requirement.
The present invention solves the technical scheme that its technical problem adopts: this float grease seal production and processing technology in turn includes the following steps:
(a) select for use rubber pattern to carry out precoated sand and be shaped to casting die;
(b) assembly unit casting die pours into casting die with molten iron and forms the floating sealing ring blank;
(c) floating sealing ring solidifies to pack into behind 40s～8min and carries out Shot Blasting through shot-blasting machine;
(d) the floating sealing ring blank after the Shot Blasting is carried out mechanical performance test, metallographic structure check, dimension control, surface quality testing;
(e) the floating sealing ring blank that is up to the standards is carried out deburring, deflashing respectively successively, polishing internal diameter, the outer warp of polishing;
(f) through abrasive disk floating sealing ring blank end face is ground;
(g) to carrying out Quenching Treatment through the floating sealing ring blank behind the end surface grinding, hardening heat is between 955 °～975 °;
(h) the floating sealing ring blank after the Quenching Treatment is carried out the inclined-plane polishing, form the floating sealing ring semi-finished product;
(i) the floating sealing ring semi-finished product after the inclined-plane polishing being carried out oil abrasion handles;
(j) oil abrasion is handled back floating sealing ring semi-finished product and clean, clean the back, form the floating sealing ring finished product antirust oil on the floating sealing ring;
(k) sampling observation cushion rubber, sheathed cushion rubber outside the floating sealing ring finished product, check, packing, warehouse-in.
Further, molten iron comprises the component of following weight portion content: Cr18～26, Mo2.5～5.7, Ni 3.78～3.76, Cu1.25～3.29, Mn1.55～3.92, Si2.87～4.15, C4.88～6.12.
Mechanical performance among the step h detects to tensile strength detects, stretching force detects, hardness detects; Size detection is that geometry detects, dimensional measurement among the step h; Surface quality detects and is the detection of blank casting flaw among the step h.
Check among the step k comprises that the detection of finished product outward appearance, the detection of floating sealing ring seal face outward appearance, the detection of floating sealing ring seal face hardness, static sealing Performance Detection, size detection, gradient detect.
Serviceability temperature detects, minimum breaking strength detects, elongation at break detects, the compression set rate detects for extraction is carried out with 1～50 cushion rubbers in the batch products in sampling observation among the step k.
Further, cushion rubber all is added with 0.6%～2.8% lead stearate for having acrylonitrile-butadiene rubber circle or fluorosioloxane rubber circle in said acrylonitrile-butadiene rubber circle, the fluorosioloxane rubber circle.
Also do not use the moulding of rubber pattern precoated sand in the art, the present invention adopts rubber pattern to carry out precoated sand and is shaped to casting die, and the rubber pattern deformable is withdrawed from, and is easy to operate; And can be repeatedly used, a cast molding, casting accuracy is high; When casting, need not to reserve allowance, can avoid the lathe turning operation, significantly reduce the molten iron waste; Help improving resource utilization, reduce production cost, also reduce pollution simultaneously environment.Through the floating sealing ring blank being carried out initial surveies such as mechanical performance test, metallographic structure check, dimension control and surface quality testing, can effectively avoid defective blank to get into next process processing, effectively practice thrift the resources of production.Through to carry out 955 °～975 ° Quenching Treatment through the floating sealing ring blank behind the end surface grinding, can significantly improve intensity, hardness, wearability, fatigue strength and the toughness etc. of floating sealing ring, thereby satisfy the workpiece quality requirement.The present invention increases corrosion resistance and the structural strength that Cu copper can obviously improve floating sealing ring; Through the said components proportioning floating sealing ring molten casting iron is fully adjusted improvement; Cooperate 955 °～975 ° Quenching Treatment; Can make hardness, wearability, the hear resistance of floating sealing ring bring up to present maximum that floating sealing ring is beyond one's reach, have beyond thought effect.Lead stearate is applied in acrylonitrile-butadiene rubber circle, the fluorosioloxane rubber circle, can make cushion rubber stability better, and hear resistance, oil resistivity are stronger, obviously reduce the permanent compression set rate.
The effect that the present invention is useful is: the present invention adopts the moulding of rubber pattern precoated sand to be cast into the floating sealing ring blank, conveniently moves back mould, a cast molding; Obviously reduce the molten iron waste; Can also avoid the operation of lathe turning allowance, help to produce in batches processing, reduce production cost; Carry out Quenching Treatment through the characteristics temperature, can significantly improve intensity, hardness, wearability fatigue strength and the toughness of floating sealing ring; Through changing floating sealing ring molten iron chemical composition and proportioning, hardness, wearability, hear resistance and the service life of effectively having improved floating sealing ring; Be machined in the finished product process and detect the quality that operation can effectively ensure product through multiple tracks.The final finished that floating sealing ring chemical composition rational proportion cooperates this cast to form among the present invention all is more than in the industry in each item detection index, and standard is worthy of popularization more than 5%～10%.
The specific embodiment
This float grease seal production and processing technology in the present embodiment in turn includes the following steps:
(a) select for use rubber pattern to carry out precoated sand and be shaped to casting die;
(b) assembly unit casting die pours into casting die with molten iron and forms the floating sealing ring blank; Molten iron comprises the component of following weight portion content: Cr18～26, Mo2.5～5.7, Ni 3.78～3.76, Cu1.25～3.29, Mn1.55～3.92, Si2.87～4.15, C4.88～6.12;
(c) floating sealing ring solidifies to pack into behind 40s～8min and carries out Shot Blasting through shot-blasting machine;
(d) the floating sealing ring blank after the Shot Blasting is carried out mechanical performance test, metallographic structure check, dimension control, surface quality testing; Mechanical performance detects to tensile strength detection, stretching force detect, hardness detects, and size detection is that geometry detects, dimensional measurement, and surface quality detects and is the detection of blank casting flaw;
(e) the floating sealing ring blank that is up to the standards is carried out deburring, deflashing respectively successively, polishing internal diameter, the outer warp of polishing;
(f) through abrasive disk floating sealing ring blank end face is ground;
(g) to carrying out Quenching Treatment through the floating sealing ring blank behind the end surface grinding, hardening heat is between 955 °～975 °;
(h) the floating sealing ring blank after the Quenching Treatment is carried out the inclined-plane polishing, form the floating sealing ring semi-finished product;
(i) the floating sealing ring semi-finished product after the inclined-plane polishing being carried out oil abrasion handles;
(j) oil abrasion is handled back floating sealing ring semi-finished product and clean, clean the back, form the floating sealing ring finished product antirust oil on the floating sealing ring;
(k) sampling observation cushion rubber, sheathed cushion rubber outside the floating sealing ring finished product, check, packing, warehouse-in; Wherein cushion rubber all is added with 0.6%～2.8% lead stearate for having acrylonitrile-butadiene rubber circle or fluorosioloxane rubber circle in acrylonitrile-butadiene rubber circle, the fluorosioloxane rubber circle; Serviceability temperature detects, minimum breaking strength detects, elongation at break detects, the compression set rate detects for extraction is carried out with 1～50 cushion rubbers in the batch products wherein to inspect cushion rubber by random samples; Wherein check comprises that the detection of finished product outward appearance, the detection of floating sealing ring seal face outward appearance, the detection of floating sealing ring seal face hardness, static sealing Performance Detection, size detection, gradient detect.
20 that extract in same a collection of 500 float grease seals that above-mentioned molten iron proportioning and production and processing technology produce are detected, and it is following specifically to detect data:
Finished product presentation quality: flawless, free from admixture, no eyelet, no bubble, no significant defect;
Static sealing Performance Detection: non-leakage;
The floating sealing ring end hardness detects: HRC69～77;
The floating sealing ring dimensional discrepancy is measured: ± 0.11 ㎜;
Detect service life: >=6500h;
Cushion rubber mismatch value detects :≤0.1%;
The cushion rubber shore hardness detects: 62.5～68.5;
The cushion rubber breaking strength detects: >=14;
The cushion rubber elongation at break detects: >=400%;
Cushion rubber compression set rate detects, 120 ° * 70h :≤28%.
Each item Performance Detection parameter of the present invention is worthy to be popularized all far above existing product.
Though the present invention is through being described with reference to preferred embodiment,, those skilled in the art should understand, and in the scope of claims, can do the various variation on form and the details.
Claims (6)
1. float grease seal production and processing technology, its characteristic in turn includes the following steps:
(a) select for use rubber pattern to carry out precoated sand and be shaped to casting die;
(b) assembly unit casting die pours into casting die with molten iron and forms the floating sealing ring blank;
(c) floating sealing ring solidifies to pack into behind 40s～8min and carries out Shot Blasting through shot-blasting machine;
(d) the floating sealing ring blank after the Shot Blasting is carried out mechanical performance test, metallographic structure check, dimension control, surface quality testing;
(e) the floating sealing ring blank that is up to the standards is carried out deburring, deflashing respectively successively, polishing internal diameter, the outer warp of polishing;
(f) through abrasive disk floating sealing ring blank end face is ground;
(g) to carrying out Quenching Treatment through the floating sealing ring blank behind the end surface grinding, hardening heat is between 955 °～975 °;
(h) the floating sealing ring blank after the Quenching Treatment is carried out the inclined-plane polishing, form the floating sealing ring semi-finished product;
(i) the floating sealing ring semi-finished product after the inclined-plane polishing being carried out oil abrasion handles;
(j) oil abrasion is handled back floating sealing ring semi-finished product and clean, clean the back, form the floating sealing ring finished product antirust oil on the floating sealing ring;
(k) sampling observation cushion rubber, sheathed cushion rubber outside the floating sealing ring finished product, check, packing, warehouse-in.
2. float grease seal production and processing technology according to claim 1 is characterized in that: said molten iron comprises the component of following weight portion content: Cr18～26, Mo2.5～5.7, Ni 3.78～3.76, Cu1.25～3.29, Mn1.55～3.92, Si2.87～4.15, C4.88～6.12.
3. float grease seal production and processing technology according to claim 1 is characterized in that: the mechanical performance among the said step h detects to tensile strength detects, stretching force detects, hardness detects; Size detection is that geometry detects, dimensional measurement among the said step h; Surface quality detects and is the detection of blank casting flaw among the said step h.
4. float grease seal production and processing technology according to claim 1 is characterized in that: the check among the said step k comprises that the detection of finished product outward appearance, the detection of floating sealing ring seal face outward appearance, the detection of floating sealing ring seal face hardness, static sealing Performance Detection, size detection, gradient detect.
5. float grease seal production and processing technology according to claim 1 is characterized in that: serviceability temperature detects the sampling observation cushion rubber among the said step k, minimum breaking strength detects, elongation at break detects, the compression set rate detects for extraction is carried out with 1～50 cushion rubbers in the batch products.
6. float grease seal production and processing technology according to claim 1 is characterized in that: said cushion rubber all is added with 0.6%～2.8% lead stearate for having acrylonitrile-butadiene rubber circle or fluorosioloxane rubber circle in said acrylonitrile-butadiene rubber circle, the fluorosioloxane rubber circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210105988.9A CN102729003B (en) | 2012-04-12 | 2012-04-12 | Floating oil seal machining process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210105988.9A CN102729003B (en) | 2012-04-12 | 2012-04-12 | Floating oil seal machining process |
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| Publication Number | Publication Date |
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| CN102729003A true CN102729003A (en) | 2012-10-17 |
| CN102729003B CN102729003B (en) | 2014-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210105988.9A Active CN102729003B (en) | 2012-04-12 | 2012-04-12 | Floating oil seal machining process |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103624492A (en) * | 2013-11-27 | 2014-03-12 | 浙江广力工程机械有限公司 | Processing technology for improving mechanical property of floating oil seal |
| CN104818422A (en) * | 2015-03-31 | 2015-08-05 | 安徽惠明机械制造有限公司 | Casting treatment technology |
| CN107790640A (en) * | 2017-10-23 | 2018-03-13 | 浙江广力工程机械有限公司 | A kind of processing preparation technology of float grease seal |
| CN115609022A (en) * | 2022-12-19 | 2023-01-17 | 雄县津海工矿机械配件有限公司 | Floating oil seal ring machining production line and working method thereof |
| CN115700290A (en) * | 2022-10-28 | 2023-02-07 | 浙江广力工程机械有限公司 | Floating seal ring for floating oil seal and preparation method thereof |
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| JPS60200950A (en) * | 1984-03-27 | 1985-10-11 | Nippon Piston Ring Co Ltd | Floating seal |
| CN1721206A (en) * | 2004-07-16 | 2006-01-18 | 朱勇胜 | Process of making low-melting point metal hollow artwork |
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| TW201029776A (en) * | 2008-10-16 | 2010-08-16 | Uddeholm Tooling Ab | Steel material and a method for its manufacture |
| CN102218504A (en) * | 2011-05-18 | 2011-10-19 | 大连新重集团有限公司 | Method for manufacturing austempered ductile iron (ADI) front axle of heavy truck by sand casting |
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2012
- 2012-04-12 CN CN201210105988.9A patent/CN102729003B/en active Active
Patent Citations (5)
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| JPS60200950A (en) * | 1984-03-27 | 1985-10-11 | Nippon Piston Ring Co Ltd | Floating seal |
| CN1721206A (en) * | 2004-07-16 | 2006-01-18 | 朱勇胜 | Process of making low-melting point metal hollow artwork |
| KR100655644B1 (en) * | 2006-04-17 | 2006-12-08 | 주식회사 진성티이씨 | Automatic production apparatus for floating seal |
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| CN102218504A (en) * | 2011-05-18 | 2011-10-19 | 大连新重集团有限公司 | Method for manufacturing austempered ductile iron (ADI) front axle of heavy truck by sand casting |
Non-Patent Citations (1)
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103624492A (en) * | 2013-11-27 | 2014-03-12 | 浙江广力工程机械有限公司 | Processing technology for improving mechanical property of floating oil seal |
| CN103624492B (en) * | 2013-11-27 | 2016-07-06 | 浙江广力工程机械有限公司 | A kind of processing technique improving float grease seal mechanical performance |
| CN104818422A (en) * | 2015-03-31 | 2015-08-05 | 安徽惠明机械制造有限公司 | Casting treatment technology |
| CN107790640A (en) * | 2017-10-23 | 2018-03-13 | 浙江广力工程机械有限公司 | A kind of processing preparation technology of float grease seal |
| CN115700290A (en) * | 2022-10-28 | 2023-02-07 | 浙江广力工程机械有限公司 | Floating seal ring for floating oil seal and preparation method thereof |
| CN115609022A (en) * | 2022-12-19 | 2023-01-17 | 雄县津海工矿机械配件有限公司 | Floating oil seal ring machining production line and working method thereof |
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| Publication number | Publication date |
|---|---|
| CN102729003B (en) | 2014-12-03 |
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