CN103480807A - Spraying method of horizontal centrifugal roller cold model - Google Patents
Spraying method of horizontal centrifugal roller cold model Download PDFInfo
- Publication number
- CN103480807A CN103480807A CN201310375331.9A CN201310375331A CN103480807A CN 103480807 A CN103480807 A CN 103480807A CN 201310375331 A CN201310375331 A CN 201310375331A CN 103480807 A CN103480807 A CN 103480807A
- Authority
- CN
- China
- Prior art keywords
- spraying
- horizontal centrifugal
- centrifugal roller
- cold mould
- roller cold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention discloses a spraying method of a horizontal centrifugal roller cold model. The spraying method is realized based on the existing horizontal centrifugal spraying equipment, and specifically comprises the following steps: A. placing a horizontal centrifugal roller cold model to be sprayed on a rotating machine, and adjusting a spray gun head at the center of a circle of the outer edge of the horizontal centrifugal roller cold model; B. adjusting the temperature of the horizontal centrifugal roller cold model to be 120-220 DEG C during spraying, adjusting the material spraying amount of the spray gun head to be 140-145g/s, and adjusting the traveling speed of a spray gun to be 20-40m/min; C. starting an electric motor to drive a spraying trolley, starting the rotating machine to rotate the horizontal centrifugal roller cold model at the same time, and spraying for 50-110 times. On the basis of the existing centrifugal roller spraying equipment, the inner wall of the horizontal centrifugal roller cold model is sprayed with a specific method, and the problem of nonuniform spraying caused by eccentricity can be effectively solved, so that the uniformity of the sprayed coating on inner wall of the cold model is improved by 60-80%.
Description
Technical field
The present invention relates to a kind of spraying method, specifically a kind of spraying method of horizontal centrifugal roller cold mould.
Background technology
For Strip, appearance and size comprises the various precision indexs of thickness, width, template, strip crown, flat shape etc.In all dimensional accuracy indexs, THICKNESS CONTROL is one of most important quality index of gauge sheet metal and band, the requirement that every profession and trade is controlled plate thickness improves constantly, the roll eccentricities that is widely used in sheet material and band production can not be ignored on the impact of plate thickness, the roll eccentricities problem has become an important component part of high-precision rolling mill THICKNESS CONTROL, becomes a focus of domestic and international metallurgy industry common concern.
The Practical Performance that the centrifugal cast iron roll is excellent with it and good casting character become the main product in market gradually, are widely used in the working roll of sheet material and band and strip rolling mill.In the production process of centrifugal cast iron roll, the quality of production of centrifugal casting roll cold mould breaker roll plays an important role, and the generation of crackle is had to very large impact.Under the effect of external force or thermal stress, roller cold type can deform, and in serious situation, can produce inner surface cracks or pit.At the metal of cold mould cracks, because heat conduction velocity is little, setting rate will be lower than other positions, and the metal of cracks will be subject to the effect of shrinkage stress and produce the crackle consistent with the cold mould surface cracks like this.And the effect of coating is exactly to adjust the cooling velocity of molten iron protection cold mould; reduce the thermal shock of molten iron to cold mould; play the chilling action that slows down molten metal, avoid causing cold mould and roll to crack or the casting flaw such as roll barrel much higher hard because of the molten metal Quench.If the coating of cold mould has local coming off or in uneven thickness, the local heat conduction of velocity thin at coating is fast, and the local speed that coating is thick is slow, and molten iron pours into after cold mould equally and can be uneven in temperature evenly to cause shrinking inhomogeneous and crack so.If coating is blocked up, under the effect of the friction with molten iron and centrifugal force, coating can become and ftractures or peel off, and in the process of solidifying at roll, can crack equally.In serious situation, roller cold type can produce pit, and the paint thickness of cracks will be greater than its peripheral region.At the metal of cold mould cracks, because heat conduction velocity is little, setting rate will be lower than other positions, and the metal of cracks will be subject to the effect of shrinkage stress and produce the crackle consistent with the cold mould surface cracks like this.In centrifugal casting process, because the reasons such as cold mould vibration, molten iron wash away are easy to cause the Paint Falling on cold mould, once come off, will cause the molten iron local solidification too fast, make roll occur that hardness of roll body is inhomogeneous, defects i.e.cracks, cause cold mould the phenomenon such as to scrap.Therefore in centrifugal roller cold mould spraying process, require the coating uniformity, thickness is identical, can not bubble, and can not hang soup again.Coating surface should smooth densification, and hardness gradually changes from the inside to the outside.
While adopting existing horizontal centrifugal spraying equipment to be sprayed short and thick large-size horizontal centrifugal roller cold mould, there is following shortcoming: 1) because the cold mould intracavity diameter is larger, length is partially short, cold mould is placed on the axis centre height difference on whirler, there is Burners Positions defect on the low side, thereby cause spray gun bias, spray gun departs from approximately 200～300mm of cold mould center.In spraying process, cold mould is constantly rotated, if Burners Positions is during lower than central axis, the amount that coating is sprayed onto the cold mould top so can reduce than so, add the gravity of coating self, be sprayed onto the coating at cold mould top still less, thereby cause the poor increase of thickness of coating layer between the cold mould top and bottom, finally on cold type inner wall, form the partially thin zone of helical form, cause spraying inhomogeneous.2) in spraying process, different in size because of cold mould, intracavity diameter is inconsistent, and therefore the requirement that the reciprocating stroke of spray gun, spray gun toggle speed and retro-speed all do not reach spraying coating process can't make spray gun enter the cold mould inner chamber and carry out the spraying effect.3) owing to starting, braking time is shorter, coating is easy to deposition, easily causes spray gun to stop up, and makes the coating layer thickness error excessive, affects the quality of roll.
Yet due to the job shop characteristics of compact layout, and new horizontal centrifugal spraying equipment is expensive, therefore how can on existing horizontal centrifugal spraying equipment basis, realize that the even spraying of cold mould just becomes roll manufacturing shop problem demanding prompt solution.
Summary of the invention
The technical issues that need to address of the present invention are to provide and a kind ofly can improve roll centrifugal cold mould coating quality, make the coating layer thickness uniformity, the spraying method of coating difficult drop-off.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of spraying method of horizontal centrifugal roller cold mould, this spraying method is realized based on existing horizontal centrifugal spraying equipment, described horizontal centrifugal spraying equipment comprises the spraying dolly that is arranged on ground guide rail, moves around along guide rail and for the lance head of spray paint, described spraying dolly is by being driven by motor-driven chain drive, and lance head is arranged on the spraying dolly by spray gun pole; The spraying method of described horizontal centrifugal roller cold mould specifically comprises the following steps:
A. at first horizontal centrifugal roller cold mould to be sprayed is placed on whirler, starter motor drives the spraying dolly to advance, and is positioned at the round center of horizontal centrifugal roller cold mould outer rim to lance head;
B. the horizontal centrifugal roller cold mould is heated to 150～250 ℃ in heating furnace, and the temperature of horizontal centrifugal roller cold mould is 120～220 ℃ while adjusting spraying, the material spray amount of adjusting lance head is 140～145g/s, and to set the spray gun speed of travel be 20～40m/min;
C. starter motor drives spraying dolly drive lance head to be sprayed the inwall of horizontal centrifugal roller cold mould again, starts whirler simultaneously the horizontal centrifugal roller cold mould is rotated, and sprays 50～110 passages.
Owing to having adopted technique scheme, the technological progress that the present invention obtains is:
The present invention adopts ad hoc approach to be sprayed the inwall of horizontal centrifugal roller cold mould on the basis of existing horizontal centrifugal roller spraying equipment, can effectively overcome because bias causes spraying inhomogeneous problem, make the uniformity of the rear cold type inner wall coating of spraying improve 60～80%.In the present invention, the spraying temperature of horizontal centrifugal roller cold mould is set as 120～220 ℃, guarantees the spraying temperature of cold mould in spraying process, thereby coating can be sticked on cold type inner wall securely.The spray gun speed of travel is set as 20～40m/min, be sprayed on cold type inner wall and coat thickness for controlling every time, reduce the thickness difference in the partially thin zone of helical form, increase the uniformity of coating, further improve the uniformity of roll working lining hardness, avoid roller surface the casting flaws such as crackle to occur.Coordinate the spraying passage of setting, to reach the requirement that meets coating thickness simultaneously.
Applying method of the present invention is sprayed the inwall of horizontal centrifugal roller cold mould, can reduce purchasing of new horizontal centrifugal roller spraying equipment, not increasing the inner floor space in workshop and saving on the basis of cost of investment, realized the even spraying of cold mould.
The specific embodiment
Below in conjunction with specific embodiment, the present invention is described in further details:
A kind of spraying method of horizontal centrifugal roller cold mould, this spraying method is realized based on existing horizontal centrifugal spraying equipment.Existing horizontal centrifugal spraying equipment comprises the spraying dolly that is arranged on ground guide rail, moves around along guide rail and for the lance head of spray paint, described spraying dolly is by being driven by motor-driven chain drive, and lance head is arranged on the spraying dolly by spray gun pole.
The spraying method of horizontal centrifugal roller cold mould specifically comprises the following steps:
A. at first horizontal centrifugal roller cold mould to be sprayed is placed on whirler, starter motor drives the spraying dolly to advance, and is positioned at the round center of horizontal centrifugal roller cold mould outer rim to lance head.
B. the horizontal centrifugal roller cold mould is heated to 150～250 ℃ in heating furnace, and the temperature of horizontal centrifugal roller cold mould is 120～220 ℃ while adjusting spraying, the material spray amount of adjusting lance head is 140～145g/s, and to set the spray gun speed of travel be 20～40m/min.
C. starter motor drives spraying dolly drive lance head to be sprayed the inwall of horizontal centrifugal roller cold mould again, starts whirler simultaneously the horizontal centrifugal roller cold mould is rotated, and sprays 50～110 passages.Passage described in the present invention refer to lance head from the initial end face of horizontal centrifugal roller cold mould to the outer face round trip.
The material spray amount of the cold mould heating-up temperature described in the present invention, lance head, the spray gun speed of travel and spraying passage, need to determine according to horizontal centrifugal roller cold mould specifically to be coated with.
In the present embodiment for to 13GLJ120033C, the horizontal centrifugal roller cold type inner wall that the cold mould specification is φ 1255mm*L2060mm is sprayed, the heating and temperature control of this cold mould in heating furnace is 250 ℃, in spraying process, the temperature of cold mould remains on 200 ± 10 ℃, the material spray amount of regulating shower nozzle is 145g/s, and the spray gun speed of travel is 30m/min, sprays 90 passages.Sprayed rear detection coating, the phenomenon that the cold mould Topcoating is thinner, do not appear in even thickness, adopts the horizontal centrifugal roller cold mould that this kind of mode sprays to carry out the production of roll, can not cause roller surface defects i.e.cracks to occur.
Claims (1)
1. the spraying method of a horizontal centrifugal roller cold mould, this spraying method is realized based on existing horizontal centrifugal spraying equipment, described horizontal centrifugal spraying equipment comprises the spraying dolly that is arranged on ground guide rail, moves around along guide rail and for the lance head of spray paint, described spraying dolly is by being driven by motor-driven chain drive, and lance head is arranged on the spraying dolly by spray gun pole; It is characterized in that: the spraying method of described horizontal centrifugal roller cold mould specifically comprises the following steps:
A. at first horizontal centrifugal roller cold mould to be sprayed is placed on whirler, starter motor drives the spraying dolly to advance, and is positioned at the round center of horizontal centrifugal roller cold mould outer rim to lance head;
B. the horizontal centrifugal roller cold mould is heated to 150～250 ℃ in heating furnace, and the temperature of horizontal centrifugal roller cold mould is 120～220 ℃ while adjusting spraying, the material spray amount of adjusting lance head is 140～145g/s, and to set the spray gun speed of travel be 20～40m/min;
C. starter motor drives spraying dolly drive lance head to be sprayed the inwall of horizontal centrifugal roller cold mould again, starts whirler simultaneously the horizontal centrifugal roller cold mould is rotated, and sprays 50～110 passages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310375331.9A CN103480807B (en) | 2013-08-26 | 2013-08-26 | A kind of spraying method of horizontal centrifugal roller cold mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310375331.9A CN103480807B (en) | 2013-08-26 | 2013-08-26 | A kind of spraying method of horizontal centrifugal roller cold mould |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103480807A true CN103480807A (en) | 2014-01-01 |
| CN103480807B CN103480807B (en) | 2015-11-18 |
Family
ID=49821591
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310375331.9A Active CN103480807B (en) | 2013-08-26 | 2013-08-26 | A kind of spraying method of horizontal centrifugal roller cold mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103480807B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108672649A (en) * | 2018-08-15 | 2018-10-19 | 成都三强轧辊股份有限公司 | A kind of large size cold mould spraying method |
| CN111647840A (en) * | 2020-07-30 | 2020-09-11 | 山东增材工业技术研究院有限公司 | Method for treating roller surface by plasma spraying |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2201990Y (en) * | 1994-06-22 | 1995-06-28 | 哈尔滨工业大学 | Centrifugal sprayer for coating internal walls of pipes |
| CN1557567A (en) * | 2004-01-18 | 2004-12-29 | 新兴铸管股份有限公司 | Heating die centrifugal casting mold spraying process for grey cast iron pipe with flexible interface |
| CN201823654U (en) * | 2010-05-14 | 2011-05-11 | 中钢集团邢台机械轧辊有限公司 | Roller cold type paint automatic spraying device |
| CN102310160A (en) * | 2011-07-07 | 2012-01-11 | 烟台台海玛努尔核电设备股份有限公司 | Paint for main pipe centrifugal casting mould pipe in million kilowatt grade nuclear power plant and coating method thereof |
| CN102328034A (en) * | 2011-10-17 | 2012-01-25 | 中钢集团邢台机械轧辊有限公司 | Cold type coated sand paint coating process for casting |
-
2013
- 2013-08-26 CN CN201310375331.9A patent/CN103480807B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2201990Y (en) * | 1994-06-22 | 1995-06-28 | 哈尔滨工业大学 | Centrifugal sprayer for coating internal walls of pipes |
| CN1557567A (en) * | 2004-01-18 | 2004-12-29 | 新兴铸管股份有限公司 | Heating die centrifugal casting mold spraying process for grey cast iron pipe with flexible interface |
| CN201823654U (en) * | 2010-05-14 | 2011-05-11 | 中钢集团邢台机械轧辊有限公司 | Roller cold type paint automatic spraying device |
| CN102310160A (en) * | 2011-07-07 | 2012-01-11 | 烟台台海玛努尔核电设备股份有限公司 | Paint for main pipe centrifugal casting mould pipe in million kilowatt grade nuclear power plant and coating method thereof |
| CN102328034A (en) * | 2011-10-17 | 2012-01-25 | 中钢集团邢台机械轧辊有限公司 | Cold type coated sand paint coating process for casting |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108672649A (en) * | 2018-08-15 | 2018-10-19 | 成都三强轧辊股份有限公司 | A kind of large size cold mould spraying method |
| CN111647840A (en) * | 2020-07-30 | 2020-09-11 | 山东增材工业技术研究院有限公司 | Method for treating roller surface by plasma spraying |
| CN111647840B (en) * | 2020-07-30 | 2022-02-15 | 青岛石创科技有限公司 | Method for treating roller surface by plasma spraying |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103480807B (en) | 2015-11-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104001893B (en) | A kind of preparation method of cylinder sleeve and special purpose device thereof | |
| CN104368756B (en) | By the method for contoured chill model casting aero-engine complex structure thick and large casting | |
| CN103480807B (en) | A kind of spraying method of horizontal centrifugal roller cold mould | |
| CN102211187B (en) | Method for manufacturing or repairing steel-based roller core composite roller through injection molding | |
| CN104551565A (en) | Manufacturing method of thin steel plate pot | |
| CN101116904A (en) | Centre spinning method of boiler center barrel | |
| CN101357396A (en) | Large double-flange copper alloy bearing-bush chilling striking-sand centrifugal casting technique | |
| CN110814312A (en) | Production method of ultra-clean metal plate | |
| CN203170930U (en) | Copper-alloy strip producing device by spray deposition | |
| CN102328034B (en) | Cold type coated sand paint coating process for casting | |
| CN211303544U (en) | Surface spraying device for roller production | |
| CN206886946U (en) | A kind of multiple-station turntable type crystallite cast pipe machine | |
| CN104233151A (en) | Continuous aluminum and zinc hot-dip plating strip steel production process | |
| CN109986055A (en) | Sand core casts low pressure molding process | |
| CN102689152B (en) | Liquid die forging rolling compound forming method for 2014 aluminium alloy large ring member with different cross sections | |
| JP6746683B2 (en) | Mold for centrifugal casting | |
| CN108213346A (en) | Metal gravity pouring technology | |
| CN108672649A (en) | A kind of large size cold mould spraying method | |
| CN106807895A (en) | Metal gravity pouring technology | |
| CN107716888A (en) | A kind of centre spinning method of cylinder jacket | |
| CN104874752B (en) | The spraying method of metal-type casting coating | |
| CN103305666A (en) | Semiaxis quench machining tool and water ejector thereof | |
| CN101733384A (en) | Production method for centrifugal casting steel tube | |
| CN114015840A (en) | Efficient water mist quenching device with uniform and controllable cooling speed | |
| JP5942359B2 (en) | Continuous molten metal plating treatment method and continuous molten metal plating treatment apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |