At the beginning of the "Tenth Five-Year Plan", China's roll surfacing technology was mostly applied to the repair of small rolls such as hot-rolled rolling rolls, profile rolls, welded pipe rolls and continuous casting rolls. Today, Sinosteel Xingtai Machinery Roll Co., Ltd. The self-innovated large-scale cold and hot strip mill support roll surfacing repair technology has increased the weight of roll repair to more than 40 tons, and formed 18 roll repair technologies with independent intellectual property rights and 2 patent technologies. Baosteel, Handan Iron and Steel, Shougang, Taigang, Laiwu Steel, Chengdu Dushang, Chengdu Aircraft, Dalian Special Steel, Handan Iron and Steel, etc. repaired hundreds of support rollers, which have created good economic benefits for these enterprises, and also cultivated for China Steel A new point of economic growth.
As a key spare part of the rolling mill, the roll consumes a lot in the rolling process, and the surfacing technology is an important manufacturing and maintenance method in the mechanical manufacturing industry. It has been widely used in roll repair in recent years. When the roll is used to the end of scrapping limit, the roll after repairing by surfacing has the characteristics of low cost, long service life and good use effect. It has obvious effect on promoting circular economy and is widely welcomed by rolling mill enterprises, which directly drives the rapid development of this technology. development of. However, in the early days of the Tenth Five-Year Plan, most of this technology was concentrated on the repair of hot-rolled mill rolls of 40 tons or less. Due to the relatively simple repair process and tooling equipment, the market entry threshold was low and the competition was fierce.
In the 21st century, with the completion of two Iranian blast furnace projects undertaken by Xingji, the Xingji Engineering Complete Company changed its name and changed its name to Roll Repair Company, specializing in high-tech R&D and production of roll surfacing repair. Since its establishment, the company has integrated the overall equipment technology and product research and development advantages of Xingji, the largest professional manufacturer of rolls in China, and started the research and development and production of large-scale cold and hot rolling mill support roll surfacing technology.
In the absence of any experience for reference, the company has carried out research on surfacing welding technology for large rolls of 60 tons or more, and has overcome the over-load calculation of lathe welding lathes and the axial displacement of reinforced rolls, high temperature oxidation of roll neck, and surfacing. A series of problems, such as metal component design, interlayer temperature control, post-weld stress elimination and control, innovatively designed and manufactured a three-in-one welding equipment for the preheating furnace and welding combined with the opening and closing furnace and welding equipment. The problem of heat loss of the roll during the preheating and surfacing process is solved, which saves time and labor, improves production efficiency, ensures product quality and saves energy. The two key technologies in this manufacturing technology - "opening and heating furnace for surfacing welding" and "multi-station welding roller frame" have successfully applied for national patents, forming the independent intellectual property rights of enterprises.
Roll surfacing repair has the characteristics of single piece small and batch operation. It is necessary to decide to use different materials and processes according to the user's individual products, different materials, different specifications and different failure conditions, which makes the roll repair technicians face almost every day. Challenges and innovative topics. This also puts an urgent request for the company to speed up the training of innovative talents and continuously improve the ability of independent innovation. Nowadays, in the repairing company, a team of more than 20 people, there are national metallurgical science and technology innovation talents, national patent inventors, and Hebei Province technical pacesetter, top ten outstanding young enterprises, outstanding young talents, and Under the demonstration and drive, the vitality of enterprise innovation has been bursting. In addition, they also use external intellectual resources to establish a chain of industry-university-research cooperation with universities such as Wuhan University of Technology, Yanshan University, Suzie, Belgium, and KIC in Korea. Through extensive technical cooperation and exchanges, they have introduced and absorbed advanced piles at home and abroad. Welding repair materials and technologies, innovating a set of equipment and process technology that suits their requirements.
After several years of accumulation and innovation, the company has successfully repaired rolls of different materials including gray iron, ductile iron, medium carbon steel, alloy cast steel, alloy forged steel, high carbon semi-steel, etc., and initially formed a complete set. System theory and operating procedures from diagnostics, repair, process control, material selection, process design, failure analysis. This combination of theory and practice and high value-added system integration technology has become the exclusive core technology of Sinosteel Xingji.
On the basis of research and development of various material roll repair technologies, they have continuously explored new market areas and successfully applied the main plunger, master cylinder, grease grinding roller, glass conveying roller, chemical fiber fabric embossing roller and cement mill for hydraulic press. Special products such as coal rollers and large gear shafts have been repaired. They have successfully developed a new special welding material for the float glass production line of Hebei Jingniu Group, which has improved the performance and life of the conveyor roller by 5 times. The technology has reached the world advanced level.
As a general agent of Xianhe in the southern region of China, we have a significant share in the domestic market and also export to overseas markets, covering multiple countries and regions around the world, including Southeast Asia, the Middle East, Europe, and North America.
As a key spare part of the rolling mill, the roll consumes a lot in the rolling process, and the surfacing technology is an important manufacturing and maintenance method in the mechanical manufacturing industry. It has been widely used in roll repair in recent years. When the roll is used to the end of scrapping limit, the roll after repairing by surfacing has the characteristics of low cost, long service life and good use effect. It has obvious effect on promoting circular economy and is widely welcomed by rolling mill enterprises, which directly drives the rapid development of this technology. development of. However, in the early days of the Tenth Five-Year Plan, most of this technology was concentrated on the repair of hot-rolled mill rolls of 40 tons or less. Due to the relatively simple repair process and tooling equipment, the market entry threshold was low and the competition was fierce.
In the 21st century, with the completion of two Iranian blast furnace projects undertaken by Xingji, the Xingji Engineering Complete Company changed its name and changed its name to Roll Repair Company, specializing in high-tech R&D and production of roll surfacing repair. Since its establishment, the company has integrated the overall equipment technology and product research and development advantages of Xingji, the largest professional manufacturer of rolls in China, and started the research and development and production of large-scale cold and hot rolling mill support roll surfacing technology.
In the absence of any experience for reference, the company has carried out research on surfacing welding technology for large rolls of 60 tons or more, and has overcome the over-load calculation of lathe welding lathes and the axial displacement of reinforced rolls, high temperature oxidation of roll neck, and surfacing. A series of problems, such as metal component design, interlayer temperature control, post-weld stress elimination and control, innovatively designed and manufactured a three-in-one welding equipment for the preheating furnace and welding combined with the opening and closing furnace and welding equipment. The problem of heat loss of the roll during the preheating and surfacing process is solved, which saves time and labor, improves production efficiency, ensures product quality and saves energy. The two key technologies in this manufacturing technology - "opening and heating furnace for surfacing welding" and "multi-station welding roller frame" have successfully applied for national patents, forming the independent intellectual property rights of enterprises.
Roll surfacing repair has the characteristics of single piece small and batch operation. It is necessary to decide to use different materials and processes according to the user's individual products, different materials, different specifications and different failure conditions, which makes the roll repair technicians face almost every day. Challenges and innovative topics. This also puts an urgent request for the company to speed up the training of innovative talents and continuously improve the ability of independent innovation. Nowadays, in the repairing company, a team of more than 20 people, there are national metallurgical science and technology innovation talents, national patent inventors, and Hebei Province technical pacesetter, top ten outstanding young enterprises, outstanding young talents, and Under the demonstration and drive, the vitality of enterprise innovation has been bursting. In addition, they also use external intellectual resources to establish a chain of industry-university-research cooperation with universities such as Wuhan University of Technology, Yanshan University, Suzie, Belgium, and KIC in Korea. Through extensive technical cooperation and exchanges, they have introduced and absorbed advanced piles at home and abroad. Welding repair materials and technologies, innovating a set of equipment and process technology that suits their requirements.
After several years of accumulation and innovation, the company has successfully repaired rolls of different materials including gray iron, ductile iron, medium carbon steel, alloy cast steel, alloy forged steel, high carbon semi-steel, etc., and initially formed a complete set. System theory and operating procedures from diagnostics, repair, process control, material selection, process design, failure analysis. This combination of theory and practice and high value-added system integration technology has become the exclusive core technology of Sinosteel Xingji.
On the basis of research and development of various material roll repair technologies, they have continuously explored new market areas and successfully applied the main plunger, master cylinder, grease grinding roller, glass conveying roller, chemical fiber fabric embossing roller and cement mill for hydraulic press. Special products such as coal rollers and large gear shafts have been repaired. They have successfully developed a new special welding material for the float glass production line of Hebei Jingniu Group, which has improved the performance and life of the conveyor roller by 5 times. The technology has reached the world advanced level.
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As a general agent of Xianhe in the southern region of China, we have a significant share in the domestic market and also export to overseas markets, covering multiple countries and regions around the world, including Southeast Asia, the Middle East, Europe, and North America.
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