CN102717225A - Method for repairing damage of non-work surface of roller - Google Patents
Method for repairing damage of non-work surface of roller Download PDFInfo
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- CN102717225A CN102717225A CN2012101824762A CN201210182476A CN102717225A CN 102717225 A CN102717225 A CN 102717225A CN 2012101824762 A CN2012101824762 A CN 2012101824762A CN 201210182476 A CN201210182476 A CN 201210182476A CN 102717225 A CN102717225 A CN 102717225A
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Abstract
The invention relates to the technical field of repair of non-work surfaces of rollers and particularly relates to a process for repairing the damage of a roller. The process comprises the following steps: firstly, preheating and preserving the heat: after removing a fatigue layer or the defects of the surface of the damaged part of the non-work surface of the roller, locally heating the damaged part and carrying out heat preservation on the heated part during heating; secondly, welding: after stop preheating, welding the damaged part of the non-work surface of the roller at an interval of 5 mm to 10 mm and quickly knocking the damaged part to enable the damaged part to be continuously welded after being recovered to be original shape; thirdly, tempering and preserving the heat: after welding, locally heating the damaged part; and fourthly, trimming. According to the method disclosed by the invention, the damaged part of the non-work surface of a high-crisp and high-hardness alloy roller is repaired by adopting a conventional welding material, welding equipment, thermal treatment equipment and simple thermal treatment process, so that the dependence on the equipment caused by a non-work surface damage process of the roller is reduced and the repair cost is effectively reduced.
Description
Technical field
The present invention relates to roll recovery technique field, is a kind of roll non-working surface damage rehabilitation method.
Background technology
It is comparatively general that iron and steel and non-ferrous metal calendering sector application milling train are rolled production, and in Rolling Production, roll directly or indirectly contacts with rolling metal, makes metal produce plastic deformation, is the main warp tool of milling train.Roll in assembling, transportation, use because bearing run in circle, end face bump, cutting or cause easily when assembling parts non-working surface wearing and tearing, pull, burn, collision deformation, cracking equivalent damage; Like untimely reparation damage location; Eliminate roll defect; Roll can cause the roll internal stress to enlarge down and equipment and product loss such as fracture and bearing be stuck occur in the effect of high rotating speed, big roll-force and big bending roller force, can cause milling train to catch fire when serious and serious accident such as casualties.Therefore, the breaker roll damage surface is repaired, and becomes to reduce the enterprise production cost, improves an important channel of milling train security.
Roll non-working surface recovery technique commonly used at present is technique for overlaying, cold-welding technique, healant adhesive technology.
The technical scheme of prior art one and the problem of existence thereof:
Roll overlaying technology: need roll be placed on before the built-up welding and carry out whole preheating in the heating furnace; After finishing, heat treatment adopt surfacing welding that damage location is carried out REPAIR WELDING; Also need adopt stainless steel electrode welding to carry out capping after the built-up welding and handle increasing the intensity on built-up welding surface, the REPAIR WELDING laggard driving that finishes is cut or grinding.The problem that exists: technique for overlaying need be selected special-purpose surfacing welding for use, and to every kind of alloying component roll different with material, the welding rod model of selecting for use is also inequality; Because welding rod is with strong points; Production and selling producer can not get ready the goods in a large number, is difficult to buy stock on the market, and the buying manufacturing cycle of welding rod special for special is long; And price is 3-5 times of the common welding rod price, has increased the time and the fund cost of user's repaired roller.
The technical scheme of prior art two and the problem of existence thereof:
Roll cold-welding technique: utilize charging capacitor, with 10
-3～10
-1Second be discharge and total cycle at interval, wherein 10
-6～10
-5Be ultrashort discharge time second.Under the protection of argon gas; Electrode bar (welding rod) can be heated to 8000～10000 ℃ with the roll contact site; Make this regional local material energetic ionization; Electrode bar (welding rod) high speed transfer under the plasma metallurgy state arrives roller surface, and diffuses into the roll top layer, forms the sedimentary deposit of metallurgy type strong bonded.The principle that realizes cold welding (the heat input is low) is to compare extremely short with discharge blanking time (It) next time discharge time (Pt); Machine has enough relative dwell times; Heat can arrive extraneous through the roll bulk diffusion, so the processed position of roll does not have the gathering of heat.The problem that exists: the thickness of cold-welding technique welding forming is less, and speed of welding is slow, and welding efficiency is lower than other welding manners, and the cold welding equipment price is more than ten times of common welding machine price, causes the cold welding welding cost far above common welding manner.
The technical scheme of prior art three and the problem of existence thereof:
The healant adhesive technology: the breaker roll damage surface polishes, clean the back selects suitable chemical adhesion material, and construction at normal temperatures links together same material or foreign material with roller surface, the reparation of realization damage surface.The problem that exists: the shortcoming of prior art three and problem: the roll damage surface of healant adhesive technology reparation causes the adhesive linkage of damage surface to throw off under external cause actions such as ROLLING OIL burn into HTHP, distortion easily.
Summary of the invention
The invention provides a kind of roll non-working surface damage rehabilitation method; Overcome the deficiency of above-mentioned prior art, it can effectively solve roll non-working surface recovery technique at present commonly used to the having relatively high expectations of wlding, welding equipment, Equipment for Heating Processing, Technology for Heating Processing, technical difficulty is big and rehabilitation cost is high problem.
Technical scheme of the present invention realizes through following measure: a kind of roll non-working surface damage rehabilitation method; This technology is undertaken by following step: the first step; Preheating insulation: after removing the fatigue layer or defective on roll non-working surface damage location surface; Damage location is carried out local heat, in the heating process heating position is incubated; In second step, welding: after stopping preheating, breaker roll non-working surface damage location every interval 5mm to 100mm distance is welded, and knocks damage location rapidly, and the damage location continued that resiles is as far as possible welded; The 3rd step, tempering insulation: after welding finishes, weld is carried out local heat, in the heating process heating position is incubated; In the 4th step, finishing: after position to be welded was cooled to room temperature, the unnecessary material at finishing distortion convexity or solder-bump position was recovered the size and dimension requirement that roll requires.
Be to the further optimization of foregoing invention technical scheme below or/and improve:
Above-mentioned when weld is carried out local heat, available roll bearing inner ring installation heater or heating blanket are enclosed within damage location and carry out local heat, use heat-preservation cotton that heating position parcel is incubated in the heating process.
During above-mentioned preheating; The temperature of heating source can be 250 ℃ to 300 ℃; Every interval 1min to 5min measures the central temperature at heating position with temperature measurer; When temperature is elevated to 245 ℃ to 255 ℃, stop heating, when temperature is reduced to 195 ℃ to 205 ℃, continue heating, the preheating insulation time is 5h to 15h.
During above-mentioned welding, can select for use argon arc welding machine and 3XX series stainless steel welding rod to weld, the electric current of argon arc welding machine is 90A to 120A.
Above-mentioned stopping after the preheating in half a minute; Breaker roll non-working surface damage location every interval 5mm to 100mm distance can be spent weldering or spot welding; Solder joint is no more than half a minute cool time, and the damage location that hits with a hammer rapidly, makes the damage location continued that resiles as far as possible carry out full weld.
During above-mentioned tempering; The temperature of heating source can be 250 ℃ to 300 ℃; Every interval 1min to 5min measures the central temperature at heating position with temperature measurer; When temperature is elevated to 245 ℃ to 255 ℃, stop heating, when temperature is reduced to 195 ℃ to 205 ℃, continue heating, tempering insulation time is 5h to 15h.
Above-mentioned finishing mode can be turning or polishing.
The present invention repairs the rigid alloy roll of the crisp height of height non-working surface damage location through adopting conventional wlding, welding equipment, Equipment for Heating Processing and simple and easy Technology for Heating Processing; Reduced the dependency degree of roll non-working surface damage technology, effectively reduced rehabilitation cost equipment.
Description of drawings
Accompanying drawing 1 is a process flow diagram of the present invention.
The specific embodiment
Further describe below in conjunction with embodiment and 1 couple of the present invention of accompanying drawing:
Shown in accompanying drawing 1; This roll non-working surface damage rehabilitation method is undertaken by following step: the first step; Preheating insulation: after removing the fatigue layer or defective on roll non-working surface damage location surface, damage location is carried out local heat, in the heating process heating position is incubated; In second step, welding: after stopping preheating, breaker roll non-working surface damage location every interval 5mm to 100mm distance is welded, and knocks damage location rapidly, and the damage location continued that resiles is as far as possible welded; The 3rd step, tempering insulation: after welding finishes, weld is carried out local heat, in the heating process heating position is incubated; In the 4th step, finishing: after position to be welded was cooled to room temperature, the unnecessary material at finishing distortion convexity or solder-bump position was recovered the size and dimension requirement that roll requires.The damage of roll non-working surface comprises cracking, weares and teares, pulls, burn and collision deformation; Rolling face is meant the roll surface that roll roll surface and rolling metal or supporting roller directly contact, and non-working surface refers to other surfaces except that working face.
Can according to actual needs above-mentioned roll non-working surface damage rehabilitation method be done further to optimize or/and improve:
Shown in accompanying drawing 1, when damage location is carried out local heat, be enclosed within weld with roll bearing inner ring installation heater or heating blanket and carry out local heat, use heat-preservation cotton that heating position parcel is incubated in the heating process.
Shown in accompanying drawing 1; During preheating; The temperature of heating source is 250 ℃ to 300 ℃, and every interval 1min to 5min measures the central temperature that heats the position with temperature measurer, when temperature is elevated to 245 ℃ to 255 ℃, stops heating; When temperature is reduced to 195 ℃ to 205 ℃, continue heating, the preheating insulation time is 5h to 15h.
Shown in accompanying drawing 1, during welding, select for use argon arc welding machine and 3XX series stainless steel welding rod to weld, the electric current of argon arc welding machine is 90A to 120A.
Shown in accompanying drawing 1; Stop after the preheating in half a minute, breaker roll non-working surface damage location every interval 5mm to 100mm distance is spent weldering or spot welding, and solder joint is no more than half a minute cool time; And the damage location that hits with a hammer rapidly, make the damage location continued that resiles as far as possible carry out full weld.
Shown in accompanying drawing 1; During tempering; The temperature of heating source is 250 ℃ to 300 ℃, and every interval 1min to 5min measures the central temperature that heats the position with temperature measurer, when temperature is elevated to 245 ℃ to 255 ℃, stops heating; When temperature is reduced to 195 ℃ to 205 ℃, continue heating, tempering insulation time is 5h to 15h.
Shown in accompanying drawing 1, the finishing mode is turning or polishing.
Claims (10)
1. roll non-working surface damage rehabilitation method; It is characterized in that being undertaken: the first step by following step; Preheating insulation: after removing the fatigue layer or defective on roll non-working surface damage location surface, damage location is carried out local heat, in the heating process heating position is incubated; In second step, welding: after stopping preheating, breaker roll non-working surface damage location every interval 5mm to 100mm distance is welded, and knocks damage location rapidly, and the damage location continued that resiles is as far as possible welded; The 3rd step, tempering insulation: after welding finishes, weld is carried out local heat, in the heating process heating position is incubated; In the 4th step, finishing: after position to be welded was cooled to room temperature, the unnecessary material at finishing distortion convexity or solder-bump position was recovered the size and dimension requirement that roll requires.
2. roll non-working surface damage rehabilitation method according to claim 1; It is characterized in that when damage location is carried out local heat; Be enclosed within damage location with roll bearing inner ring installation heater or heating blanket and carry out local heat, use heat-preservation cotton that heating position parcel is incubated in the heating process.
3. roll non-working surface damage rehabilitation method according to claim 1 and 2; When it is characterized in that preheating; The temperature of heating source is 250 ℃ to 300 ℃, and every interval 1min to 5min measures the central temperature that heats the position with temperature measurer, when temperature is elevated to 245 ℃ to 255 ℃, stops heating; When temperature is reduced to 195 ℃ to 205 ℃, continue heating, the preheating insulation time is 5h to 15h.
4. roll non-working surface damage rehabilitation method according to claim 1 and 2 when it is characterized in that welding, selects for use argon arc welding machine and 3XX series stainless steel welding rod to weld, and the electric current of argon arc welding machine is 90A to 120A.
5.
roll non-working surface damage rehabilitation method according to claim 3 when it is characterized in that welding, selects for use argon arc welding machine and 3XX series stainless steel welding rod to weld, and the electric current of argon arc welding machine is 90A to 120A.
6. roll non-working surface damage rehabilitation method according to claim 1 and 2; It is characterized in that stopping after the preheating in half a minute; Breaker roll non-working surface damage location every interval 5mm to 100mm distance is spent weldering or spot welding; Solder joint is no more than half a minute cool time, and the damage location that hits with a hammer rapidly, makes the damage location continued that resiles as far as possible carry out full weld.
7. roll non-working surface damage rehabilitation method according to claim 5; It is characterized in that stopping after the preheating in half a minute; Breaker roll non-working surface damage location every interval 5mm to 100mm distance is spent weldering or spot welding; Solder joint is no more than half a minute cool time, and the damage location that hits with a hammer rapidly, makes the damage location continued that resiles as far as possible carry out full weld.
8. roll non-working surface damage rehabilitation method according to claim 1 and 2; When it is characterized in that tempering; The temperature of heating source is 250 ℃ to 300 ℃, and every interval 1min to 5min measures the central temperature that heats the position with temperature measurer, when temperature is elevated to 245 ℃ to 255 ℃, stops heating; When temperature is reduced to 195 ℃ to 205 ℃, continue heating, tempering insulation time is 5h to 15h.
9. roll non-working surface damage rehabilitation method according to claim 7; When it is characterized in that tempering; The temperature of heating source is 250 ℃ to 300 ℃, and every interval 1min to 5min measures the central temperature that heats the position with temperature measurer, when temperature is elevated to 245 ℃ to 255 ℃, stops heating; When temperature is reduced to 195 ℃ to 205 ℃, continue heating, tempering insulation time is 5h to 15h.
10. roll non-working surface damage rehabilitation method according to claim 9 is characterized in that the finishing mode is turning or polishing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210182476.2A CN102717225B (en) | 2012-06-05 | 2012-06-05 | Method for repairing damage of non-work surface of roller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210182476.2A CN102717225B (en) | 2012-06-05 | 2012-06-05 | Method for repairing damage of non-work surface of roller |
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| CN102717225A true CN102717225A (en) | 2012-10-10 |
| CN102717225B CN102717225B (en) | 2015-05-20 |
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| CN201210182476.2A Expired - Fee Related CN102717225B (en) | 2012-06-05 | 2012-06-05 | Method for repairing damage of non-work surface of roller |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104668881A (en) * | 2015-01-19 | 2015-06-03 | 江苏久日数控机床有限公司 | Repairing method for roll of numerical-control gantry type tube maker |
| CN106271160A (en) * | 2016-08-31 | 2017-01-04 | 武汉瑞祥安精密制造有限责任公司 | A kind of welding technique producing little welding stress and small deformation |
| CN107695610A (en) * | 2017-10-30 | 2018-02-16 | 北京建筑大学 | A kind of prosthetic device for train wallboard local damage |
| CN108971883A (en) * | 2018-09-30 | 2018-12-11 | 上海吴泾电力工程有限责任公司 | Suitable for cheating the field repairing method of cavity space |
| CN112372106A (en) * | 2020-09-29 | 2021-02-19 | 中车长江车辆有限公司 | Repair welding method for repairing corrosion point on surface of parent metal |
| CN112935480A (en) * | 2021-03-25 | 2021-06-11 | 安徽马钢设备检修有限公司 | Repairing device and repairing process for surface abrasion of large wheel fixing table base |
| CN113146140A (en) * | 2021-04-28 | 2021-07-23 | 卢改花 | Repairing method for worn supporting wheel of inner hole of electric shovel |
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| JPH03118971A (en) * | 1989-09-29 | 1991-05-21 | Kobe Steel Ltd | Building-up roll for continuous casting |
| CN101003104A (en) * | 2006-09-22 | 2007-07-25 | 攀钢集团钢城企业总公司协力公司 | Built up welding technique of restoring roller for shape bar |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104668881A (en) * | 2015-01-19 | 2015-06-03 | 江苏久日数控机床有限公司 | Repairing method for roll of numerical-control gantry type tube maker |
| CN106271160A (en) * | 2016-08-31 | 2017-01-04 | 武汉瑞祥安精密制造有限责任公司 | A kind of welding technique producing little welding stress and small deformation |
| CN107695610A (en) * | 2017-10-30 | 2018-02-16 | 北京建筑大学 | A kind of prosthetic device for train wallboard local damage |
| CN107695610B (en) * | 2017-10-30 | 2019-02-22 | 北京建筑大学 | A kind of prosthetic device for train wallboard local damage |
| CN108971883A (en) * | 2018-09-30 | 2018-12-11 | 上海吴泾电力工程有限责任公司 | Suitable for cheating the field repairing method of cavity space |
| CN112372106A (en) * | 2020-09-29 | 2021-02-19 | 中车长江车辆有限公司 | Repair welding method for repairing corrosion point on surface of parent metal |
| CN112372106B (en) * | 2020-09-29 | 2022-05-03 | 中车长江车辆有限公司 | Repair welding method for repairing corrosion point on surface of parent metal |
| CN112935480A (en) * | 2021-03-25 | 2021-06-11 | 安徽马钢设备检修有限公司 | Repairing device and repairing process for surface abrasion of large wheel fixing table base |
| CN112935480B (en) * | 2021-03-25 | 2022-06-03 | 安徽马钢设备检修有限公司 | Repairing process for surface abrasion of large wheel fixing table base |
| CN113146140A (en) * | 2021-04-28 | 2021-07-23 | 卢改花 | Repairing method for worn supporting wheel of inner hole of electric shovel |
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|---|---|
| CN102717225B (en) | 2015-05-20 |
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