Company Profile
One of the largest chain manufacturers in China
Has five subsidiaries including Hangzhou Ziqiang Chain Drive Co., Ltd. Hangzhou Dunpai Chain Co., Ltd. And Hangzhou Donghua Power Transmission IMP. & EXP. Co., Ltd. etc. Hangzhou Donghua Chain Group Co., Ltd. Was founded in November 1991.
The company is specialized in producing all kinds of standard chains and special chains, e. g. A or B series chains, automobile chains, stainless steel chains, combine harvester chains, heavy-duty cranked link transmission chains, stereo garage chains and maintenance-free chains etc. In recent years, it invests the capital and depends on the improvement of technology to accelerate the step of new product development and the step of technology reform. It intends to produce high strength and precision chains in order to meet requirements of the domestic and overseas markets.
1991
Founded
in
6
Major manufacturing
bases
6
Domestic wholly-owned
subsidiaries
8
Overseas
subsidiaries
30000+
The company can
produce(varieties)
100000+
kinds of
chain products
Our History
Specialty Design
Through professional design and effective product test verification. the product performance can meet the needs of users.
Advanced Technology
lt has realized the whole proces of professional manufacturing from material processing parts manufacturing to chain assembly, and ensured the delivery of high-quality products.
Raw material processing
Realize the processing of raw materials such as chain plate material. flat wire material and round wire material required for chain manufacturing.
01
Environment-friendly shot blasting line
-- Scale removal on the surface of chain plate raw material
02
Automatic slitting production line for coiled sheet material
-- Split shear of chain plate material
03
Continuous processing production line of flat silk
-- Processing of sleeve flat wire
Parts Manufacturing
The wide application of advanced process equipment and technology such as high-speed precision punch press, high-precision stamping die, high-speed pin cutter, high-speed sleeve coiling machine, multi-station cold heading machine, laser cutting machine. automatic milling machine and numerical control machining center ensures the high quality and high efficiency of parts manufacturing.
01
Progressive stamping technology
-- Efficient continuous precision blanking of chain plate
02
lntegrated stamping technology
-- Progressive blanking and bending forming of chain plate
03
Precision forming processing technology
-- Cold heading forming of pin shaft
Heat treatment
lt has advanced heat treatment equipment such as continuous controllable atmosphere mesh belt furnace.controllable atmosphere box type multipurpose furnace and continuous controllable atmosphere isothermal furnace to ensure the stability and consistency of key performance of parts.
01
Continuous controllable atmosphere mesh belt furnace
-- Heat treatment of chain plate, pin shaft, sleeve, roller and other parts
02
Continuous controlled atmosphere isothermal furnace
-- lsothermal quenching of parts such as chain plate and pin shaft can obtain comprehensive mechanical properties of
03
Controlled atmosphere box type multipurpose furnace
--Heat treatment of pin shaft. sleeve, roller and other parts
Chain Assembly
High-speed automatic assembly line,online image inspection,online running-in/pre-stretching,online oiling.automatic welding and other advanced process equipment and technologies are widely used to ensure efficient manufacturing of high-quality chain products.
01
Automatic assembly production line
-- Ensure efficient and high-quality assembly of chain products
02
Online detection
-- Full inspection of chain to ensure product quality
03
Running-in/pretensioning
-- Reduce the initial wear and elongation of the chain and improve the fatigue strength of the chain
Die Making
lt has high-precision CNC equipment and processing technology such as high-precision wire cut wire cutting,EDM. coordinate grinder, vacuum quenching furnace and cryogenic treatment.
01
Wire cut wire cutting machine tool
-- Achieve precision machining of mold
02
Vacuum quenching furnace
--Mold heat treatment
Donghua Chain Group introduced the "ISO9000 Series Standards' quality management system in 1995, always taking"continuously developing and satisfying customers'needs is our eternal pursuit" (quality policy) as the starting point of all its work,and continuoustly improves the product quality and product grade, and continuously supporting the improvement of the company's management level and the rapid development of enterprises through the system operation of combining efective quality control and advanced testing equipment in the whole process focusing on prevention.
By continuously establishing and perfecting the advanced quality management system. the Group has continuously passed ISO 9002 certification. ISO 9001 certification,APl7F certfication,.IATF 16949 certification. ISO 10012 certfication, ISO/IEC 17025 certification and lSO 45001 certification.
R&D Capability
Hangzhou Donghua Chain Group. based on the chain drive industry, aims at global resources to build a global R&D system with Hangzhou headquarters as its core and overseas branches such as Germany and Japan as its support.and realize a global innovation system with seamless connection between R&D, manufacturing and sales. The enterprise technology center of the company is a national enterprise technology center, with national Post-Doctoral Research Center,provincial enterprise research institutes, provincial high-tech enterprise research and development centers andother scientific research platforms in China, and overseas R&D platforms in KÖBO of Germany and Enuma Chain of Japan Co.,Ltd.
The company has more than 4oo scientific and technical personnel, including 15o middle and senior titles, which provides a strong guarantee for high-quality products. Continuously develop and apply new technologies, new processes and new materials. and develop various high-performance chain drive products with high technical content and independent intellectual property rights. so that the company's technology and R&D level are in the forefront of the industry.
The company implements the strategy of innovating and strengthening enterprises.continuously increases investment in scientific research. possesses advanced R&D equipment and complete test facilities, and the laboratory has obtained CNAS accreditation certificate. With isothermal quenching furnace, multi-purpose furnace, vacuum heat treatment furnace, CNC machining center, wire cut wire cutting machine, high-speed press, high-speed assembly machine and other research and development equipment lt has spectrum analyzer. three-dimensional coordinate measuring instrument, image measuring instrument, fatigue testing machine.Charpy pendulum impact testing machine, chain wear test bench. transmission/transfer case performance test bench.automobile engine chain durability test bench and other test and detection equipment.
R&D achievements
The company insists on independent research and development,focusing on forward-looking technology, and has made a series of achievements in subdivided application fields.
By the end of 2019, the company had 222 authorized patents, including 52 invention patents: Accumulated more than 13o awards for various new technologies and products.
The company is the vice chairman of the National Chain Drive Standardization Technical Committee. As a representative of domestic enterprises for many years. it has participated in the formulation and revision of international chain drive standards and is a member of ISO/TC 100 international standard expert group. In recent years, he has been responsible for or participated in the revision of 9 international standards (ISO),19 national standards (GB/T) 11 industry standards(JB/T) and 3 group standards for chain drive. Participate in the compilation of tool manuals and monographs such as the latest chain drive standard application manual, ISO/TC 10o chain drive international standard translation set, English-Chinese-English chain drive vocabulary and chain drive technical manual.
lndustry-university-research cooperation
The company attaches great importance to the construction of the joint innovation mechanism of production, education and research as a major platform for technological innovation of enterprises. With Zhejiang University.Jilin University, Chongqing University of Technology, Chain Transmission,National Chain Transmission Research Institute.Zhejiang Applied Engineering Materials Research Institute,Wuhan researchinstitute of materials protection and other well-known domestic universities and research institutes, the continuous and in-depthindustry-university-research cooperation has greatly promoted the technological progress of enterprises.
Key scientific research projects
The company actively responds to the national economic development strategy, undertakes key scientific research projects, and promotes industrial upgrading and technological progress.Developed various chain drive products with high strength, high precision, fatigue resistance and wear resistance, which are widely used in automobiles, power stations, high-speed rail equipment, subway facilities, airport facitities and so on. For example, he has undertaken one national industrial transformation and upgrading strong foundation project,one central investment project of the National Development and Reform Commission, one 863 Program project and one National Natural Science Foundation project, and won three ministerial awards(the first prize of China Standard lnnovation Contribution Award, the National Machinery Industry Science and Technology Progress Award and the Ministry of lndustry and Information Technology Progress Award.
Team Activity
