When the spring is made from materials that do not need to be hardened or tempered after forming, the process is spiral compression spring: rolling, de-stressed annealing, grinding of two ends, (shot blasting), (rectification), (de-stressed annealing), standing or strong pressure treatment, inspection, surface anti-corrosion treatment, packaging.
Coil stretching spring: rolling, de-stress annealing, hook making, (cutting the tail), de-stress annealing, standing treatment, inspection, surface anti-corrosion treatment, packaging.
Spiral torsion spring: rolling, de-stress annealing, torsion arm making, cutting tail, de-stress annealing, standing treatment, inspection, surface anti-corrosion treatment, packaging.
The manufacturing process of spiral drawing and torsion spring described above is to process the hook ring or torsion arm of both ends after winding in the ordinary spring coil machine.In recent years, many domestic and foreign manufacturers have produced and used computer shaping machine or special shaping machine, the shape of spring body and tail can be completed in the forming machine last time, saving the process of machining hook ring or torsion arm.
When a spring is made from a material that needs to be hardened or tempered after forming, the main difference from the above process is that it needs to be hardened or tempered after forming, and sometimes the end of the spring needs to be normalized.
In order to improve production efficiency, a production line is formed for springs with mass production requirements.Such production line can not only improve production efficiency and economic efficiency, but also guarantee product quality.Typical production line, such as valve spring production line, suspension spring production line.
Flow chart of valve spring production line: coil spring, (nitriding), (cleaning), stress relief annealing, (height separation), two-end grinding, chamfering, primary shot blasting, (secondary shot blasting), (hot pressing), load separation, anti-rust oil coating, finished product inspection, packaging.
Suspension spring production line process:
Cold forming: coil spring, de-stress annealing, (hot pressing), (flaw detection), shot peening, (hot shot + stress shot peening), (cold pressing), load sorting, surface coating, finished product testing, packaging.
Hot forming: material heating, coil spring, (end forming), quenching, tempering, (hot pressing), testing, shot blasting (once or more), cold pressing, load sorting, surface coating, finished product testing, packaging.
The procedure with brackets is an unfixed procedure, which depends on the performance requirements of the spring.
Coil spring is short for spring coil forming.Coil spring is the first and important process of spring manufacturing. The precision of rolling plays an extremely important role in the whole manufacturing process. It basically determines the geometrical dimensions and characteristics of spring and the utilization rate of materials.
The spring coiling equipment generally includes a spring coiling machine with a spindle and a spring coiling machine with a centerless shaft.The following describes the coil spring of the coil spring machine and the coil spring machine.