CN111054996A - Roll fish scale pattern accurate hole pattern approaching surfacing repair process - Google Patents
Roll fish scale pattern accurate hole pattern approaching surfacing repair process Download PDFInfo
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- CN111054996A CN111054996A CN202010008229.5A CN202010008229A CN111054996A CN 111054996 A CN111054996 A CN 111054996A CN 202010008229 A CN202010008229 A CN 202010008229A CN 111054996 A CN111054996 A CN 111054996A
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- surfacing
- fish scale
- welding
- repair process
- groove
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
- B23K9/044—Built-up welding on three-dimensional surfaces
- B23K9/046—Built-up welding on three-dimensional surfaces on surfaces of revolution
- B23K9/048—Built-up welding on three-dimensional surfaces on surfaces of revolution on cylindrical surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
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- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The invention discloses a roll fish scale pattern accurate pass approximation surfacing repair process, which relates to the technical field of roll surface treatment and comprises the following steps: 1) turning a fatigue layer; 2) preheating; 3) heat-resistant, wear-resistant and impact-resistant welding materials are stacked at the welded position; 4) surfacing and welding a high flat ring at the bottom of the groove of the hole type; 5) and tempering; 6) turning the hole pattern according to the drawing requirement and a sample plate; 7) and inspecting and leaving the factory. The method effectively reduces the abrasion of the hole-shaped groove, concentrates parts needing to be repaired, facilitates the rolling process, reduces the abrasion and damage to the fish scale pattern, lightens the labor intensity of workers, reduces the surfacing cost, effectively reduces the failure risks of roller chipping, fracture and the like, saves a large amount of nonrenewable noble metals such as Cr, Ni, Mo, V, Nb and the like, and contributes to energy conservation and emission reduction.
Description
Technical Field
The invention relates to the technical field of roller surface treatment, in particular to a precise hole pattern approaching surfacing repair process for a roller fish scale pattern.
Background
The method for repairing various waste and old metallurgical rolls by using the surfacing repair technology belongs to the field of green remanufacturing technology, is a process mode which is widely applied at present, is particularly important for surfacing repair of section steel rolls, saves a large amount of precious metals and reduces the rolling cost. The process flow comprises the following steps: 1. turning a fatigue layer; 2. preheating; 3. heat-resistant, wear-resistant and impact-resistant welding materials are stacked at the welded position; 4. surfacing; 5. tempering; 6. turning a hole pattern according to the drawing requirement and a sample plate; 7. and (5) checking and leaving factory. According to the traditional surfacing repair process, in the surfacing process, an operator performs surfacing according to the hole pattern position of a machined fatigue removal layer by referring to the drawing marked dimension, the diameter is increased by 8-10 mm after welding compared with the drawing marked dimension, the side wall (single face) is increased by 5-8 mm, and the increased part of surfacing allowance is prepared for the subsequent turning process. The process causes the waste of Cr, Ni, Mo, V and Nb in a large amount of surfacing materials, and simultaneously increases the workload of turning.
In the traditional surfacing repair process, in order to ensure the gripping property in the steel rolling process after turning or delivery, grooves with the depth of 2mm, the width of 8mm and the length of 80mm are engraved in the rolling groove according to circumferential distribution by adopting a carbon arc gouging process so as to increase the friction coefficient of the roller and ensure that a rolled piece can smoothly enter the rolling groove. The hazards of this procedure are: the instantaneous temperature of the indented position reaches 1250-1300 ℃, so that local cracks are generated, the steel rolling accidents caused by block falling and crack expansion are easily generated in the rolling process, and obvious material damage is generated on the accurate scale pattern hole of the roller, so that the specified rolling quantity can be finished, and great difficulty and workload are inevitably brought to the next repair. Meanwhile, the method causes additional labor and health injury to workers who perform the process.
Disclosure of Invention
The invention aims to provide a roll fish scale pattern accurate pass approximation surfacing repair process, which effectively reduces abrasion of a profiled groove, concentrates parts needing to be overhauled, is convenient for an overhauling process, reduces abrasion and damage to the fish scale pattern, avoids labor injury to staff, reduces surfacing cost, and effectively reduces failure risks such as roll chipping, fracture and the like.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a roll fish scale pattern accurate hole pattern approximation surfacing repair process comprises the following steps:
1. turning a fatigue layer; 2. preheating; 3. heat-resistant, wear-resistant and impact-resistant welding materials are stacked at the welded position; 4. surfacing, and welding a high flat ring at the bottom of the groove of the hole type; 5. tempering; 6. turning a hole pattern according to the drawing requirement and a sample plate; 7. and (5) checking and leaving factory.
The technical scheme of the invention is further improved as follows: and 4, welding a high flat ring at the bottom of the groove of the first two pass of the groove.
The technical scheme of the invention is further improved as follows: in step 4, the difference between the outer diameter and the inner diameter of the high flat ring is 3-6 mm.
The technical scheme of the invention is further improved as follows: in step 4, the radius of the high-flat ring welded at the bottom 2 of the groove of the first hole type is smaller than that of the high-flat ring welded at the bottom 2 of the groove of the second hole type.
The technical scheme of the invention is further improved as follows: in the step 1, the surfacing quantity is accurately measured and the size after welding is designed after the fatigue layer is turned, the error is guaranteed to be +/-0.3 mm, and the surfacing process is controlled by a Siemens 828D device according to the size of the roller shown in the figure.
The technical scheme of the invention is further improved as follows: and 4, detecting each hole pattern after welding, including detecting the bottom 2 of the hole pattern groove, so as to ensure that the designed size before welding is met.
The technical scheme of the invention is further improved as follows: and 5, detecting the size of the whole hole after heat treatment, and grasping the coefficients of expansion with heat and contraction with cold of rollers with different hole types and different specifications.
The technical scheme of the invention is further improved as follows: and 6, selectively processing the surfacing position, and keeping the post-welding state by over 85 percent.
Due to the adoption of the technical scheme, the invention has the technical progress that:
the invention effectively reduces the abrasion of the scale-shaped groove by arranging the high flat ring, concentrates the parts needing to be overhauled, facilitates the overhauling process, the maintenance of the steel tapping guide plate, the smooth support of the steel tapping guide plate, the abrasion and the damage to the fish scale pattern, the heredity of the fish scale pattern is kept, and the cost for maintaining the fish scale pattern is reduced. The method avoids the use of a carbon arc gouging process, prevents the generation of local cracks, prevents steel rolling accidents, facilitates multiple repair works, and avoids the labor injury to staff. The gripping performance of the roller to rolled stock in work is improved, good gripping conditions are kept according to the inheritance of a steel rolling pass, the process of nicking in the pass is omitted, and a good foundation is laid for circular repair.
In the process of overlaying, the overlaying allowance is effectively controlled, the operation rate and the utilization rate of a welding bed are improved, the overlaying cost is reduced, and a large amount of precious metals such as Cr, W, Mo, Ni and the like are saved. The surfacing welding method has the advantages that the surfacing welding workload is reduced, 15-20% of welding materials are saved, the labor intensity of operators is reduced, and 10-15% of electric energy is saved. The turning time is reduced, the operation rate of the lathe is improved, and the working strength of an operator is reduced. A large amount of strong carbide tissues are gathered on the surface of the surfacing layer, and the steel passing amount of the roller is increased. The phenomenon of slipping of the rolled stock is avoided, the operation rate of the rolling mill is improved, and the roll changing time is reduced. Effectively reducing the failure risks of roller chipping, breakage and the like.
Drawings
FIG. 1 is a schematic structural view of the present invention;
wherein, 1, a side wall, 2, a groove bottom, 2a, a fish scale pattern, 3 and a high flat ring.
Detailed Description
The present invention will be described in further detail with reference to the following examples:
as shown in figure 1, the roll fish scale pattern accurate hole pattern approaching surfacing repair process comprises the following steps:
1) turning a fatigue layer, accurately measuring the surfacing quantity and designing the size after welding after the fatigue layer is turned, ensuring the error to be +/-0.3 mm, and performing program control on the surfacing process according to the size of a roller shown in the drawing by utilizing Siemens 828D equipment;
2) preheating;
3) heat-resistant, wear-resistant and impact-resistant welding materials are stacked at the welded position;
4) surfacing, and welding a high flat ring 3 at the groove bottom 2 of the groove with the hole shape, wherein the high flat ring 3 is in an annular welding structure; only welding high flat rings 3 at the positions of the scales 2a on the bottoms 2 of the two groove types, wherein the radius of the high flat rings 3 welded on the bottoms 2 of the groove types of the first groove type is smaller than that of the high flat rings 3 welded on the bottoms 2 of the groove types of the second groove type, the difference between the outer diameter and the inner diameter of each high flat ring 3 is 3-6 mm, namely the width of each high flat ring 3 is 3-6 mm, and detecting each groove type after welding, including detecting the bottoms 2 of the groove types, so as to ensure that the designed size before welding is met;
5) tempering, detecting the size of the whole hole after heat treatment, and grasping the expansion and contraction coefficients of different holes and rollers with different specifications;
6) turning a hole pattern according to the requirements of a drawing and a sample plate, selectively processing a surfacing position, and keeping the post-welding state by more than 85%;
7) and inspecting and leaving the factory.
The inclination and the smoothness of the side wall 1 of the hole shape are ensured in the machining process, and the groove stripping is facilitated by considering the rolling factors.
After the first batch of ∠ 100 steel angles are rolled, the steel is unloaded, the steel is rolled for 8075.53 tons after the steel is rolled for 103 hours on line, the steel rolling equipment operates stably in the process, the single-groove steel output exceeds 7500 tons of an expected target under the condition that a steel rolling groove is used by about 80 percent, after the three rollers are unloaded, the hole pattern is checked through a standard hole pattern sample plate, and the results are that 1, the first groove is worn down by 1.0mm, the hole pattern shape is kept good, 2, the downward wear of the roller groove in the second groove is smaller than 1.0mm, the hole pattern of the roller in the second groove is worn by 2.0mm, the hole pattern is well preserved, the wear is relatively large due to the continuous sliding friction between a rear steel tapping guide plate and the groove bottom, and 3, the downward wear of the third groove is very slight, and the hole pattern basically keeps the original appearance.
And then, slightly welding the second type groove, wherein the type groove is kept normal, but the welding can cause obvious scale splashing problem.
After the second batch of ∠ 90 angle steels are rolled, the steel is fed off the line for 144 hours, rolled steel is 5182 tons, the steel rolling equipment operates stably in the process, a steel rolling groove uses about 60 percent, after the three rollers are fed off the line, the hole pattern is checked through a standard hole pattern sample plate, and the results are that 1, the downward abrasion of a first groove is less than 1.0mm, the hole pattern shape is kept good, 2, the downward abrasion of a roller groove on a second groove is less than 1.0mm, the hole pattern abrasion of a roller in the second groove is about 1.5mm, the hole pattern is well preserved, the abrasion is relatively large due to uninterrupted sliding friction between a rear steel tapping guide plate and the groove bottom, 3, a third groove hole pattern and a fourth groove hole pattern are slightly abraded downwards, the hole pattern basically keeps the original appearance, the third groove hole pattern is an oval hole pattern, fish scale grooves are not formed, and the tooth rising signs are shown in the area with the width of 5mm at the lower.
In the whole process of line feeding, the steel biting rod piece is kept well without welding the groove.
In view of the initial thought, the technology is suitable for the prior art, has obvious effect and has room for improvement.
Claims (8)
1. The accurate pass approximation surfacing repair process for the fish scale pattern of the roller is characterized by comprising the following steps of: the method comprises the following steps:
1) turning a fatigue layer; 2) preheating; 3) heat-resistant, wear-resistant and impact-resistant welding materials are stacked at the welded position; 4) surfacing and welding a high flat ring (3) at the bottom (2) of the groove with the hole shape; 5) and tempering; 6) turning the hole pattern according to the drawing requirement and a sample plate; 7) and inspecting and leaving the factory.
2. The roll fish scale pattern accurate pass approximation surfacing repair process according to claim 1, characterized in that: and step 4, welding a high flat ring (3) at the bottom (2) of the groove of the first two pass.
3. The roll fish scale pattern accurate pass approximation surfacing repair process according to claim 1, characterized in that: in the step 4, the difference between the outer diameter and the inner diameter of the high flat ring (3) is 3-6 mm.
4. The roll fish scale pattern accurate pass approximation surfacing repair process according to claim 2, characterized in that: in the step 4, the radius of the high-flat ring (3) welded at the groove bottom 2 of the first hole type is smaller than that of the high-flat ring (3) welded at the groove bottom 2 of the second hole type.
5. The roll fish scale pattern accurate pass approximation surfacing repair process according to claim 1, characterized in that: in the step 1, the surfacing quantity is accurately measured and the size after welding is designed after the fatigue layer is turned, the error is guaranteed to be +/-0.3 mm, and the surfacing process is controlled by a Siemens 828D device according to the size of the roller shown in the figure.
6. The roll fish scale pattern accurate pass approximation surfacing repair process according to claim 1, characterized in that: and 4, detecting each hole pattern after welding, including detecting the bottom 2 of the hole pattern groove, so as to ensure that the designed size before welding is met.
7. The roll fish scale pattern accurate pass approximation surfacing repair process according to claim 1, characterized in that: and 5, detecting the size of the whole hole pattern after heat treatment, and grasping the coefficients of expansion with heat and contraction with cold of rollers with different hole patterns and different specifications.
8. The roll fish scale pattern accurate pass approximation surfacing repair process according to claim 1, characterized in that: and 6, selectively processing the surfacing position, and keeping the post-welding state by over 85 percent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010008229.5A CN111054996A (en) | 2020-01-06 | 2020-01-06 | Roll fish scale pattern accurate hole pattern approaching surfacing repair process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010008229.5A CN111054996A (en) | 2020-01-06 | 2020-01-06 | Roll fish scale pattern accurate hole pattern approaching surfacing repair process |
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| CN111054996A true CN111054996A (en) | 2020-04-24 |
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| CN202010008229.5A Pending CN111054996A (en) | 2020-01-06 | 2020-01-06 | Roll fish scale pattern accurate hole pattern approaching surfacing repair process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118513566A (en) * | 2024-07-23 | 2024-08-20 | 中国科学院工程热物理研究所 | Double-laser melt forging additive remanufacturing method for roller gradient wear-resistant reinforced layer |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU770583A1 (en) * | 1978-12-05 | 1980-10-15 | Nizhnedneprovskij Truboprokatn | Roll for longitudinal rolling of tubes |
| CN101091959A (en) * | 2006-06-22 | 2007-12-26 | 葫芦岛市钢管工业有限公司 | Not isodiametric rollers in use for molding welded steel pipes |
| CN201295692Y (en) * | 2008-10-31 | 2009-08-26 | 许亚南 | Roll ring with groove |
| CN102152058A (en) * | 2011-05-11 | 2011-08-17 | 天津冶金集团重型机械制造有限公司 | Surfacing repair method for large cold-rolled supporting roll |
| CN102441760A (en) * | 2011-11-07 | 2012-05-09 | 山西鼎荣冷弯型钢有限公司 | Cold-bending roller welding repair method |
| CN103481012A (en) * | 2013-09-22 | 2014-01-01 | 湖州市银鑫轧辊有限公司 | Welding repairing method for rolls |
| CN204018813U (en) * | 2014-07-31 | 2014-12-17 | 攀钢集团成都钢钒有限公司 | Screw thread collars system of processing |
| CN204620638U (en) * | 2015-04-20 | 2015-09-09 | 中石化石油工程机械有限公司沙市钢管厂 | A kind of novel high-frequency and middle ERW roll |
| CN107052701A (en) * | 2017-03-31 | 2017-08-18 | 安徽再制造工程设计中心有限公司 | A kind of roll overlaying technique |
-
2020
- 2020-01-06 CN CN202010008229.5A patent/CN111054996A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU770583A1 (en) * | 1978-12-05 | 1980-10-15 | Nizhnedneprovskij Truboprokatn | Roll for longitudinal rolling of tubes |
| CN101091959A (en) * | 2006-06-22 | 2007-12-26 | 葫芦岛市钢管工业有限公司 | Not isodiametric rollers in use for molding welded steel pipes |
| CN201295692Y (en) * | 2008-10-31 | 2009-08-26 | 许亚南 | Roll ring with groove |
| CN102152058A (en) * | 2011-05-11 | 2011-08-17 | 天津冶金集团重型机械制造有限公司 | Surfacing repair method for large cold-rolled supporting roll |
| CN102441760A (en) * | 2011-11-07 | 2012-05-09 | 山西鼎荣冷弯型钢有限公司 | Cold-bending roller welding repair method |
| CN103481012A (en) * | 2013-09-22 | 2014-01-01 | 湖州市银鑫轧辊有限公司 | Welding repairing method for rolls |
| CN204018813U (en) * | 2014-07-31 | 2014-12-17 | 攀钢集团成都钢钒有限公司 | Screw thread collars system of processing |
| CN204620638U (en) * | 2015-04-20 | 2015-09-09 | 中石化石油工程机械有限公司沙市钢管厂 | A kind of novel high-frequency and middle ERW roll |
| CN107052701A (en) * | 2017-03-31 | 2017-08-18 | 安徽再制造工程设计中心有限公司 | A kind of roll overlaying technique |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118513566A (en) * | 2024-07-23 | 2024-08-20 | 中国科学院工程热物理研究所 | Double-laser melt forging additive remanufacturing method for roller gradient wear-resistant reinforced layer |
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Application publication date: 20200424 |
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