Audited Supplier
We adhere to the management principles of "quality first, customer first and credit-based" since the establishment of the company and always do our best to satisfy potential needs of our customers. Our company is sincerely willing to cooperate with enterprises from all over the world in order to realize a win-win situation since the trend of economic globalization has developed with anirresistible force.
According to our practise, even with the same steel type, the similar steel components, same manufacturing process, heat treatment and assembling process, there are different performances on fatigue strength. Hengjiu only uses high quality steel from selected steel factory to ensure the stability of our chain quality.
High Precise Mold with Independent Intellectual Property Rights
Key quality points, such as plate hole, pitch, and hole surface, are all key elements which highly related to chains' firmness, loading strength and fatigue strength. Hengjiu uses high-precision molds and toolings to make sure that the surface finish reaches to 80% and above.
High-quality Heat Treatment and Surface Treatment
Hengjiu introduces the latest continuous mesh belt furnace to heat treatment of parts to ensure the parts' high quality and consistency.All parts of Hengjiu's leaf chains are treated by shotting peening, which can efficiently improve the chain's fatigue strength.
Optical Image Detection
The pins of the leaf chains are 100% optical inspected before assembling, which completely eliminate the traditional rely on human eyes to identify defective products and avoid the quality risk.
Optical detection technology is also applied to detect the missing parts and poor assembly for finished chains.
Automatic Assembling and On-line Inspecting Line
Hengjiu self-developed assembling and inspecting line, which combines 7 steps, assembling, mechanical and magnetic missing parts detection, pin length inspection, riveting, prestretching, oiling, and cutting into one line, highly improves the production efficiency and lowers the quality dependence on workers.
All chains are pre-stretched. High quality pretension not only improves the fatigue strength of the chain effectively, but also has the function of assembly straightening.
Quality Tracing System
Lean production model is implemented in Hengjiu leaf chain producing. All producing and inspecting data is collected and inputted into Group EAS system. Quality tracing can be achieved as required as far as to raw material supplier and material batch no.
