CN103899708B - Chain being applicable to low temperature environment and preparation method thereof - Google Patents
Chain being applicable to low temperature environment and preparation method thereof Download PDFInfo
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- CN103899708B CN103899708B CN201410121442.1A CN201410121442A CN103899708B CN 103899708 B CN103899708 B CN 103899708B CN 201410121442 A CN201410121442 A CN 201410121442A CN 103899708 B CN103899708 B CN 103899708B
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Abstract
The invention discloses a kind of chain being applicable to low temperature environment and preparation method thereof, this chain comprises outer plate, bearing pin, inner plate, sleeve and the intermediate plate be made up of low temperature resistant alloy high-quality steel, an inner link is formed by two panels inner plate and two sleeve interference fit, form export trade sheet by two panels intermediate plate and bearing pin interference fit, be connected successively formed chain by multiple inner link and multiple export trade sheet two ends outer plate that covers again in tandem; In sleeve, fill low temperature grease, bearing pin two ends adopt cubic die to be locked after being each passed through sleeve and outer plate; Described outer plate, inner plate and intermediate plate all adopt wide waist structure, and described bearing pin surface has high hardened layer.The technical program improves the intensity of chain, extends chain working life, and has good reliability.
Description
Technical field
Patent of the present invention relates to drilling equipment transmission chain bar, especially a kind of superhigh strength chain being applicable to low temperature and the rugged environment such as dust, impact and preparation method thereof.
Background technique
At present, some use common standard chain and stainless steel chain two type chain in low temperature environment, particularly be used on drilling equipment and there is dust, the occasion that the high strength of impacting requires, the material that standard chain uses easily produces cold short phenomenon at low ambient temperatures and produces fracture, and stainless steel chain overcomes brittle fracture under low temperature phenomenon but intensity aspect cannot meet the requirement of high strength load, for use client chain often rupture, frequently must change chain, working life is short, poor reliability, high concerning cost end user, manufacturing efficiency is low.
Summary of the invention
In order to solve above-mentioned technical problem, the object of this invention is to provide a kind of superhigh strength chain being used in low temperature and the rugged environment such as dust, impact and preparation method thereof, improving the intensity of chain, extend chain working life, and there is good reliability.
To achieve the above object, present invention employs following technological scheme:
A kind of chain being applicable to low temperature environment, comprise outer plate, bearing pin, inner plate, sleeve and the intermediate plate be made up of low temperature resistant alloy high-quality steel, an inner link is formed by two panels inner plate and two sleeve interference fit, form export trade sheet by two panels intermediate plate and bearing pin interference fit, be connected successively formed chain by multiple inner link and multiple export trade sheet two ends outer plate that covers again in tandem; In sleeve, fill low temperature grease, bearing pin two ends adopt cubic die to be locked after being each passed through sleeve and outer plate; Described outer plate, inner plate and intermediate plate all adopt wide waist structure, and described bearing pin surface has high hardened layer.
As preferably, described outer plate, inner plate are identical with the thickness of intermediate plate, and described pin diameter is greater than 1.8 times of outer plate thickness, and described sleeve wall thickness is greater than 0.5 times of outer plate thickness.Increasing pin diameter and sleeve wall thickness not only can improve chain strength, and are convenient to surface treatment and improve treatment effect.
A kind of preparation method being applicable to the chain of low temperature environment, after described outer plate, inner plate and intermediate plate are shaping by low temperature resistant alloy quality steel plate material stamping-out, heat-treat again and shot blast, then pairing and the Boring of numerical control are simultaneously carried out to the inner plate in the inner link of two on same chain link, pairing and the Boring of numerical control are simultaneously carried out to the outer plate of same group and intermediate plate; After bearing pin is shaping by low temperature resistant alloy high-quality rod iron material stamping-out, first heat-treat, make its centre hardness at 35 ~ 40HRC, then carry out Surface Vanadizing process, make its surface produce high hardened layer through secondary hardening post-curing, high hardened layer hardness is at more than 2000HV; Described sleeve is made up of low temperature resistant alloy high-quality steel, through Overheating Treatment and centreless grinding processing; When chain assembles, form an inner link by two panels inner plate and two sleeve interference fit, form export trade sheet by two panels intermediate plate and bearing pin interference fit, be connected successively formed chain by multiple inner link and multiple export trade sheet two ends outer plate that covers again in tandem; In sleeve, fill low temperature grease, bearing pin two ends adopt cubic die to be locked after being each passed through sleeve and outer plate; Carry out powerful prestretching after chain has assembled, prestretching load is the chain tensile strength of 60%.
The present invention, owing to have employed above technological scheme, selects the Low temperature steel material being adapted to low temperature environment; Chain structure and common double row roller chain have had obvious improvement, and intermediate plate and bearing pin adopt interference fit, and this structure can the stressing conditions of effective lifting chain, and makes it uniform stressed.The corresponding improvement of design of part, carrier bar is modified into wide waist type, and strengthen the aspects such as pin diameter and carry out design optimization, processing technology is compared than conventional machining process and be there has also been great improvement, increases numerical control bore hole, improve the precision of carrier bar after carrier bar pairing, heat treatment step; Bearing pin adopts surface through secondary hardening post-curing; When chain assembles, chain hinge point all fills anti-low temperature grease, makes chain in initial operation, obtain the lubrication of filling; Can ensure to meet the high strength of chain, impact-resistant requirement at low ambient temperatures by this series of design and process modification, thus extend the working life of chain.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the plan view of Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is made a detailed explanation.
Embodiment 1:
A kind of chain being applicable to low temperature environment as shown in Figure 1 and Figure 2, comprise outer plate 1, bearing pin 2, inner plate 3, sleeve 4 and the intermediate plate 5 be made up of low temperature resistant alloy high-quality steel, an inner link is formed by two panels inner plate 3 and two sleeve 4 interference fit, form export trade sheet by two panels intermediate plate 5 and bearing pin 2 interference fit, be connected successively formed chain by multiple inner link and multiple export trade sheet two ends outer plate 1 that covers again in tandem; In sleeve 4, fill low temperature grease, after bearing pin 2 two ends are each passed through sleeve 4 and outer plate 1, adopt cubic die to be locked; Described outer plate 1, inner plate 3 and intermediate plate 5 all adopt wide waist structure, and described bearing pin 2 surface has high hardened layer.Described outer plate 1, inner plate 3 are identical with the thickness of intermediate plate 5, and described bearing pin 2 diameter is greater than 1.8 times of outer plate 1 thickness, and described sleeve 4 wall thickness is greater than 0.5 times of outer plate 1 thickness.
A kind of preparation method being applicable to the chain of low temperature environment, after described outer plate 1, inner plate 3 and intermediate plate 5 are shaping by low temperature resistant alloy quality steel plate material stamping-out, heat-treat again and shot blast, then pairing and the Boring of numerical control are simultaneously carried out to the inner plate in the inner link of two on same chain link, pairing and the Boring of numerical control are simultaneously carried out to the outer plate of same group and intermediate plate; After bearing pin 2 is shaping by low temperature resistant alloy high-quality rod iron material stamping-out, first heat-treat, make its centre hardness at 35 ~ 40HRC, then carry out Surface Vanadizing process, make its surface produce high hardened layer through secondary hardening post-curing, high hardened layer hardness is at more than 2000HV; Described sleeve 4 is made up of low temperature resistant alloy high-quality steel, through Overheating Treatment and centreless grinding processing; When chain assembles, an inner link is formed by two panels inner plate 3 and two sleeve 4 interference fit, form export trade sheet by two panels intermediate plate 5 and bearing pin 2 interference fit, be connected successively formed chain by multiple inner link and multiple export trade sheet two ends outer plate 1 that covers again in tandem; In sleeve 4, fill low temperature grease, after bearing pin 2 two ends are each passed through sleeve 4 and outer plate 1, adopt cubic die to be locked; Carry out powerful prestretching after chain has assembled, prestretching load is the chain tensile strength of 60%.
The present embodiment, the superhigh strength chain of suitable for low temperature environment, primarily of 5 part compositions, by two inner plates 3 and two sleeve 4 interference fit, forms an inner link; Export trade sheet is formed by intermediate plate 5 and bearing pin 2 interference fit; Be connected successively just can be obtained the chain of any joint number by inner link and the export trade sheet two ends outer plate 1 that covers again in tandem again, specific low temperature grease is all filled in lid outer plate 1 front sleeve 4, chain energy flexible rotating after assembling, bearing pin runs through the technology with cubic die after outer plate, pin roll end face place external diameter is increased, thus increases the joint fastness of bearing pin and carrier bar.Structure is close with common double transmission roller chain structure, but intermediate plate and bearing pin adopt interference fit technology, this technology plays the effect of chain uniform force, can not because of chain stressed initial time bearing load very large, make outer plate pin-and-hole be easy to be stretched after distortion and come off.
Because chain is used in low temperature and the severe occasion such as dust, impact, improve on the part of chain and technique, chain material selects low temperature resistant austenitic cryogenic steel, special in the element such as chemical composition Ni, Mn, and select most suitable heat treatment hardness through low temperature Charpy test, make chain equally have outstanding mechanical property under the occasion of low temperature; Alloy high-quality steel selected by carrier bar, and template becomes wide waist structure, after heat treatment step, carry out shot blast, improves the fatigue behaviour of carrier bar, and increases numerical control bore hole, improve the precision of carrier bar; Inner plate in two inner links on same chain link must match, the bore hole of numerical control simultaneously, and the outer plate of same group and intermediate plate pairing after numerical control bore hole, object is the conformity ensureing that its chain plate hole heart carpenters square is very little, makes chain operationally uniform force after assembling; Bearing pin adopts high-duty cast steel, bearing pin is after Overheating Treatment, centre hardness is at about 37HRC, after through the process of SV Surface Vanadizing, make surface through secondary hardening post-curing, hardness is up to more than 2200HV, surface is made to produce high hardened layer, summer ratio when low temperature-50 DEG C is at more than 25J, and the center toughness of bearing pin effectively can solve impact when chain uses, and the high hardened layer on surface improves the wear resistance of bearing pin simultaneously; Jacket casing selects alloy high-quality steel, through the manufacturing process such as Overheating Treatment and centreless grinding, can ensure to have certain intensity and toughness, meet the requirement of impact property; When chain assembles, chain hinge point all fills low temperature resistant grease, and this low temperature grease is commonly used to aviation field, also can have good nitre at low ambient temperatures like viscosity and low temperature torque, make chain in initial operation, obtain the lubrication of filling; On special device, carry out powerful prestretching after chain has assembled, prestretching load reaches the chain tensile strength of 60%, effectively eliminates initial chain elongation, improves the anti-fatigue performance of chain entirety.Because of chain be two chains when real work about use simultaneously, the chain after powerful prestretching has carried out measurement of comparison, makes the total length of two chains control within certain scope, can even stand under load during use.This series of design and process modification effectively improve tensile strength, wear-resisting property, the fatigue behaviour of chain, can ensure also can normally use at low temperature and the severe occasion such as dust, impact, finally extend the working life of chain.
Above-mentioned chain is the chief component that machinery arranges power system, and first hydraulic press band movable sprocket, makes chain move on sprocket wheel, the function that drill bit can be allowed to have pressing down or rise by the movement of chain.And chain is processed through appropriate design, the normal operation that drilling well is arranged can be met completely, extend the working life of chain, increase the operating time of drilling well, thus promote the benefit of client.
It is emphasized that: be only preferred embodiment of the present invention above, not any pro forma restriction is done to the present invention, every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (3)
1. one kind is applicable to the preparation method of the chain of low temperature environment, it is characterized in that, this chain comprises outer plate (1), bearing pin (2), inner plate (3), sleeve (4) and the intermediate plate (5) be made up of low temperature resistant alloy high-quality steel, an inner link is formed by two panels inner plate (3) and two sleeve (4) interference fit, form export trade sheet by two panels intermediate plate (5) and bearing pin (2) interference fit, be connected successively formed chain by multiple inner link and multiple export trade sheet two ends outer plate (1) that covers again in tandem; In sleeve (4), fill low temperature grease, bearing pin (2) two ends are each passed through sleeve (4) and outer plate (1) adopts cubic die to be locked afterwards; Described outer plate (1), inner plate (3) and intermediate plate (5) all adopt wide waist structure, and described bearing pin (2) surface has high hardened layer; After described outer plate (1), inner plate (3) and intermediate plate (5) are shaping by low temperature resistant alloy quality steel plate material stamping-out, heat-treat again and shot blast, then pairing and the Boring of numerical control are simultaneously carried out to the inner plate in the inner link of two on same chain link, pairing and the Boring of numerical control are simultaneously carried out to the outer plate of same group and intermediate plate; After bearing pin (2) is shaping by low temperature resistant alloy high-quality rod iron material stamping-out, first heat-treat, make its centre hardness at 35 ~ 40HRC, then carry out Surface Vanadizing process, make its surface produce high hardened layer through secondary hardening post-curing, high hardened layer hardness is at more than 2000HV; Described sleeve (4) is made up of low temperature resistant alloy high-quality steel, through Overheating Treatment and centreless grinding processing; When chain assembles, an inner link is formed by two panels inner plate (3) and two sleeve (4) interference fit, form export trade sheet by two panels intermediate plate (5) and bearing pin (2) interference fit, be connected successively formed chain by multiple inner link and multiple export trade sheet two ends outer plate (1) that covers again in tandem; In sleeve (4), fill low temperature grease, bearing pin (2) two ends are each passed through sleeve (4) and outer plate (1) adopts cubic die to be locked afterwards; Carry out powerful prestretching after chain has assembled, prestretching load is the chain tensile strength of 60%.
2. be applicable to a chain for low temperature environment, it is characterized in that, the preparation method's preparation as claimed in claim 1 of this chain strip adoption.
3. a kind of chain being applicable to low temperature environment according to claim 2, it is characterized in that, described outer plate (1), inner plate (3) are identical with the thickness of intermediate plate (5), described bearing pin (2) diameter is greater than 1.8 times of outer plate (1) thickness, and described sleeve (4) wall thickness is greater than 0.5 times of outer plate (1) thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410121442.1A CN103899708B (en) | 2014-03-28 | 2014-03-28 | Chain being applicable to low temperature environment and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410121442.1A CN103899708B (en) | 2014-03-28 | 2014-03-28 | Chain being applicable to low temperature environment and preparation method thereof |
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| CN103899708A CN103899708A (en) | 2014-07-02 |
| CN103899708B true CN103899708B (en) | 2016-01-27 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104372294B (en) * | 2014-11-19 | 2017-06-13 | 杭州持正科技有限公司 | The special bearing pin of engine chain and vacuum ionic depositing process |
| CN104613129A (en) * | 2014-12-25 | 2015-05-13 | 杭州持正科技有限公司 | Vanadinizing chain pin shaft and manufacturing method thereof |
| CN105689633B (en) * | 2016-01-29 | 2019-02-01 | 湖州求精汽车链传动有限公司 | Nonstandard silent chain processing method and nonstandard silent chain |
| CN105927710A (en) * | 2016-07-07 | 2016-09-07 | 环球传动泰州有限公司 | Low-temperature-resistant garage chain |
| CN106286707A (en) * | 2016-09-22 | 2017-01-04 | 苏州顺革智能科技有限公司 | A kind of be applicable to multi-gear arranged side by side widen chain |
| CN111255857B (en) * | 2020-03-23 | 2021-11-16 | 江西百圣机械制造有限公司 | Tile pin chain and processing method thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2729875B2 (en) * | 1992-04-03 | 1998-03-18 | 極東開発工業株式会社 | Pallet lifting device in a multilevel parking lot |
| JPH10250818A (en) * | 1997-03-11 | 1998-09-22 | Tsubakimoto Chain Co | Oil-impregnated sintered bush conveyor chain |
| JP2006214485A (en) * | 2005-02-02 | 2006-08-17 | Tsubakimoto Chain Co | Coldproof roller chain |
| CN201593586U (en) * | 2009-12-09 | 2010-09-29 | 重庆永发摩托车配件有限公司 | Snowmobile reverse gear box chain |
| CN201982580U (en) * | 2010-12-29 | 2011-09-21 | 杭州自强链传动有限公司 | Chain |
| JP5805035B2 (en) * | 2012-08-29 | 2015-11-04 | 株式会社椿本チエイン | Suspension chain |
| CN203770532U (en) * | 2014-03-28 | 2014-08-13 | 杭州东华链条集团有限公司 | Chain suitable for low-temperature environment |
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