Industrial Springs Design and Manufacture

• All of our raw materials are from trustworthy suppliers: materials for hot coil springs are from Shijiazhuang Iron & Steel Company (Shigang), and Huaigang Special Steel Company; materials for cold coil springs are from Xinyu Iron & Steel Company, and Tianjin Dihua Special Steel Company. We commit that the chemical components, mechanical properties, and dimension of our raw materials will be completely in line with your requirements.
• Each batch of raw materials must be inspected before being put into production.
• Raw materials: 60Si2MnA, 65Mn, 50CrVA, 60CrMnBA, and SUP11, etc. We can order steels according to clients' demands.

Hot Coil Spring Production Line

Juneng owns 2 fully-automatic hot coil spring production lines, totally covering about 10 thousand m². The line for large helical spring is utilized to make springs whose diameter ranges from 14mm to 100mm. Its annual output is about 5000 tons.
The other one is set to produce small hot springs with a diameter of 12mm-40mm.

Medium-frequency induction furnace
We use this CNC induction furnace to heat the spring materials, ensuring the temperature uniformity and preventing the generation of oxide coating, as well as extending the life of springs.

This equipment is utilized to process the heated raw materials into springs. Operators have access to adjust the coiling speed and spring pitch on this machine. Spring dimensions are regulated strictly according to clients' drawings.

Before quenching, we will use an infrared thermometer to test the materials' temperature, the value of which will be reached in 1s. After being shaped, the springs will be put into the quenching furnace. Generally the quenching process will last for 5 minutes.

Tempering treatment is adopted to shape springs. It is accomplished with a CNC salt bath tempering furnace, which controls the temperature with a computer to ensure the accuracy and uniformity of the tempering process. The treated springs will be well-shaped and show excellent metal ductility.

This grinding machine is applied only in processing large hot coil springs whose diameter is over 70mm. It deals with 2 springs each time.

Juneng currently possesses 8 fully-automatic cold coil spring making machines, among which there are 3 8-axis spring coiling machines for producing 0.2-14mm compression springs, shaped springs, extension springs, and torsion springs, etc.

• Raw material cutting
• Steel bar processing (forging or rolling)
• Heating
• Coiling
• Quenching
• Tempering
• Spring end grinding
• Compressing (load test)
• Sand blasting (cleaning)
• Painting