What are the conventional quality problems and treatment methods of precision spring manufacturers?

The deformation of precision spring cannot meet the requirement of precision tension spring. In the process of processing, should be gently handled, otherwise easy to produce external deformation, special attention should be paid to the operation of each process, such as slow commutation speed, light operation of precision spring blank, as far as possible less stress relief annealing. When the precision spring is heated in the furnace, it should be smooth or easy to deform. The precision spring should be equipped with corresponding auxiliary tools. When the end face is grounded, the precision spring should be ground flat, otherwise it will affect the verticality of the precision spring. When the precision of the spiral winding tension adjusting the initial tension is the same as the initial tension, there must be a large tension between the springs. Steel wire can be wound on the mandrel, by adjusting the feeding Angle and feeding tension can be wound with initial tension non-hardened metal wire precision spiral spring has a certain initial tension, if there is no initial tension, there should be a gap between the two rings. Annealing temperature and holding time have a great influence on the initial tension of the precision spring, the time is short, the initial tension remains high, otherwise the initial tension remains low. If more initial tension is retained, the temperature can be as low as 180° C. The primary annealing temperature for the initial tension of the helical spring only plays a supplementary role. How to ensure the stability of diameter and size of spiral spring. In order to make the diameter of the spring stable, the speed of the precision spring can not be too fast, otherwise the precision spring will appear taper and spring rotation more times, the accuracy is also high, but also pay attention to the speed of rebound. In the processing of the same batch of precision springs, to master the spring back speed of each precision spring can not be too different.