Wafangdian Zhengda metallurgical rolling mill bearing Co., Ltd. was established in September 1994. Now the company covers an area of 21208 square meters, with a building area of 15000 square meters. It is located in the northern suburb of Wafangdian Bearing Factory, the birthplace of Chinese bearings in Wafangdian City, Liaoning Province. There are Shenyang Dalian Expressway, medium long railway, Dalian seaport and international airport. The land, sea and air transportation is very convenient.
Wafangdian Zhengda metallurgical rolling mill bearing Co., Ltd. is a professional manufacturer of rolling mill bearings in China. It is a provincial-level quality and reputation assurance unit and the product is qualified by international standards. It is a member unit of the equipment accessories center of China Metallurgical Enterprise Management Association, with advanced technology, complete testing means, and quality control in the whole production process. In 2008, it obtained the ISO9001:2000 certificate of SGS company of Switzerland; In April 2010, SGS passed the iso14004:2004 environmental management system certification and obtained the environmental management system certification.
The bearing rings are made of high quality and low oxygen content vacuum degassed bearing steel; the equipment is sophisticated and the heat treatment adopts the multi-purpose furnace production line, which is at the advanced level in China; the product parts are strengthened to improve the surface quality and fatigue strength, which is welcomed by the majority of customers. Our company has a certain share of the rolling mill bearings used by Shanghai Baosteel, Wuhan steel works, Baotou Steel works, Laiwu steel works, Chengde Steel works, Shougang strip steel works, Kungang, Guangzhou Angang, Beiman steel works, Fushun Steel works, Guanggang, guangdai and other units.
Over the years, the company has obtained 41 patent certificates, including 7 invention patents and 34 utility model patents, which have been awarded as Dalian patent demonstration enterprise. The company has more than 100 excellent equipment. The CNC grinder equipment purchased by the company ensures the accuracy of the products. The heat treatment workshop adopts the Austria multipurpose furnace production line, and the whole process computer automatic control. The advanced equipment achieves the world first-class level. The multi-purpose furnace can be bright quenching, gas carburizing and carbonitriding, preventing the workpiece from oxidation and decarbonization during the hot working process. The brand products produced by the company are positioned as the high-end rolling mill bearing market, and the marketing strategy based on the domestic market and focusing on the foreign market and domestic alternative imported bearing market is implemented. In recent years, the bearing of high-speed wire rod mill has been specially developed. The products are widely used in high-speed wire rod, bar, plate, profile and other rolling equipment and rubber and plastic machine equipment in metallurgical industry. The product quality conforms to national standards, international standards and special requirements of customers. The registered trademark of the product is "wzzz". The developed rolling mill bearing occupies a certain advantage in the industry and enjoys a high reputation. Among them, 330661c British four row tapered roller bearing and sealed four row tapered roller bearing have been successfully used in 1700 cold rolling mill of WISCO, replacing the imported ones; 331168a domestic bearing for Xiamen Zhongda bar has been successfully used; idtb0034-2ls with sealed double row tapered roller bearing designed for 2050 vertical hot rolling mill of Baosteel has been successfully used in trial, t-e-48680d / 48620 / 4862 0deiv4 bearing replaced SKF Bearing in Shanghai Baosteel Group and successfully replaced it. It successfully developed sealed double row tapered roller bearing for 2050 tropical vertical roll mill of a steel plant in Shanghai and won the gold medal of international invention pioneer in Nuremberg, Germany. It has been successfully used in many well-known steel mills to replace imported bearings. The research and development of four row cylindrical roller bearing with seal, senjimir bearing, vibrating screen bearing, continuous casting and rolling mill bearing, and the research and development of stamping cage of spherical roller bearing not only prolong the service life of bearing, but also reduce the production cost for users. "Wzzz" products are not only popular in China, but also exported to Austria, Germany, India, Taiwan and other countries and regions, deeply trusted by users at home and abroad.
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86Large projects completed
2626 years of establishment
86Large projects completed
2626 years of establishment
WaFangDian ZhengDa Metallurgical Mill Bearing Co.,Ltd.
With the recovery of domestic economy, the demand of all walks of life is gradually stronger, and the steel industry is the first to bear the brunt. According to the national policy, we advocate energy conservation and environmental protection, and eliminate backward production capacity. Some small steel mills with serious pollution and backward production capacity have been banned one by one. Instead, the competitive advantages of some large state-owned steel enterprises have gradually emerged. The state proposes to "transform and upgrade the manufacturing industry. The focus of manufacturing industry development is to optimize the structure, improve the quality of varieties, enhance the supporting capacity of the industry, "support the technological transformation of enterprises, and enhance the ability of new product development and brand innovation". Bearing production is an important part of the manufacturing industry, and the large support roll bearing is an important part of the large rolling mill in the rolling industry. "The bearing industry proposes that before the independence rate of major equipment bearing - Comprehensive independence rate reached more than 80%, these large support roller bearings mainly rely on imports, which is a large expenditure of the enterprise. The long-life supporting roller bearing for large-scale rolling mill just fills the gap in China, reduces the cost for steel enterprises and creates profits and taxes for the country. At present, the main enterprises that can produce this kind of products are Wazhou group, Northwest Bearing Co., Ltd. and Beijing Tianma bearing factory. These enterprises have a complete range of products, basically nine kinds of bearings are produced, which can not effectively reflect their professionalism. At the same time, due to the large size of the model, there is no advantage in the price. On the contrary, our company has built its own factory to produce professional products The bearing enterprises of rolling mill are highly professional. At the same time, due to their small scale and flexible management, they are able to solve practical problems for customers according to the quality policy of "your reality, my plan". Therefore, in recent years, the market share of long-life bearings for large supporting rollers has basically reached 5%. The international market situation and the future growth trend of the product, the competitiveness in the international market, and the possibility of substitute import or export of the product.
At present, most of the large steel mills in the international market adopt SKF, FAG and Timken bearing brand products. Generally, the processing cycle is relatively long and the price is relatively high. For European and American countries, most of them will choose such products, but for emerging economies, India, Brazil, South Africa and some Southeast Asian countries often choose to compete with relatively high products from mainland China. With the participation of foreign exhibitions and some domestic bearing exhibitions, more and more foreign customers will know about "wzzz" brand products, which will increase the export volume of the company.
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Exported to Austria, Germany, India, Taiwan and other countries and regions, deeply trusted by users at home and abroad
Development direction of company brand construction
Enterprise development plan
Three step development plan of Zhengda Company in the future
1. Consolidate the market share of "wzzz" brand in the domestic cold rolling market, and continue to develop cooperation with state-owned enterprises and state-owned steel giants, so as to achieve good performance in this basic market.
2. Replace the imported bearings in the products of domestic precision rolling mill, reduce the production cost for customers, use our high reliability products, realize the win-win situation between customers and "wzzz" brand, and make due contribution to the rapid development of the country
3. Go abroad, let "wzzz" brand directly participate in the international bearing market competition, seize the market share of world-class bearing manufacturers, and use our high reliability, high precision and long-life products to win honor for the country.
The bearing product design adopts the CAD / CAE software system of finite element design theory to develop the rolling mill bearing, and carries out kinematics, pseudo dynamics, seal performance simulation analysis, etc. to improve the use of the ultimate strength design method to design the bearing and other rolling elements to lengthen and thicken. The number of rolling elements is designed according to the optimization method of bearing design objective function bearing the maximum load. The overall layout of the cage is reasonable and the parameters are accurate, so as to ensure the advanced design of the bearing. The lubricating system is changed so that the oil supply of bearing lubricating oil is more sufficient and there is enough strength limit in use. Improve the bearing dynamic load capacity. Improve the service life of bearing from product design structure. Improve the design capacity of rolling mill bearing research and development. Innovate the failure analysis of bearing service life, lubrication and seal design, and improve the whole;
Adopting advanced new heat treatment process and fully intelligent computer-controlled aixilin multi-functional heat treatment furnace, it can realize bearing non oxidation and environmental protection heat treatment.
The advanced production line of aixilin heat treatment furnace in China, salt bath bainite quenching process, can obtain the internal structure of bearing in surface compressive stress state. It can improve the service performance and fatigue life of bearings
The bearing material is made of carburized steel. During the heat treatment of aixieling furnace, the surface is carburized evenly, and the depth of decarburization layer is less than 0.04mm. The long life and high reliability can be reflected in the product technology. Improve bearing durability.
The key quality problems of different parts in the quenching process are solved by isothermal quenching technology.
The use of turning instead of rough grinding not only ensures the efficiency of machining, but also solves the technical key problem that grinding stress can not be eliminated.
Grinding process to eliminate grinding stress to eliminate reflection error and create a new bearing process, which adopts additional tempering and ultra precision treatment.
Innovation of compound grinding technology. To solve the problem of positioning error of grinding clamping products for many times.
Compared with the original bearing, the new materials used in the processing of ferrule, rolling element and cage have innovation in product structure, and the processing technology is different from the traditional technology. It is very difficult to process. There are many innovations in bearing processing technology
The company has continuously increased investment in product research and development, updated production equipment and testing instruments, and high-tech precision CNC equipment and testing instruments dominate. Now it has the most advanced production line of aixielin multi-purpose furnace and production line of aixielin martensite and bainite, realizing reliable atmosphere heating and heat treatment process automation. In order to ensure the accuracy of products, 1600mm CNC vertical mill is purchased, which not only expands the processing range of products, but also improves the processing accuracy of products. At the same time, we have purchased a number of CNC Internal Grinder, CNC external grinder and raceway super precision machine. With these advanced equipment, the accuracy of our products can reach P2 level. In terms of testing methods, the direct reading spectrometer of Oxford company in the UK and Zeiss microscope in Germany were newly purchased, which provided reliable guarantee for the composition and organization inspection of bearing materials; the purchase of two meter length measuring machine and portable roughness tester created conditions for the quality inspection of large-scale products. These equipment and instruments are the cornerstone of good product quality control.