These products are used for auto parts
With the continuous development of China's automobile, tractor, diesel, motorcycle, moped and electric industry, spring varieties are also gradually increased, increasing the number of. New reed was one of them.
The action of the pressure spring is the use of the tension of the clutch pressure plate and clutch plate tightly in the wheel, so that the power of the engine to the transmission reliability of transmission.
Dongguan Yi compression spring on the quality requirements are as follows:
1, appearance: the surface quality of the finished product quality requirements of spring should be smooth, no cracks, rust, oxide skin defects. Do not allow a depth exceeding material diameter tolerance of half of the individual pits and scratches indentation, cold spring roll.
2, material: material is 65Mn steel pressure spring or I, II group carbon spring steel wire.
3, hardness: after cold coiling spring quenching, tempering, the hardness value should be in the range of 44-52HRC, special circumstances can expand the range of the hardness to 55HRC.
4, processing density