Integrated box buckle shaped spring

Stress relief heat treatment of integrated box buckle shaped spring
The integrated box buckle shaped spring is a spring element with a unique design and excellent performance. Its design combines the characteristics of box shape and buckle shape, so that it can provide good stability and durability while having high strength. This spring is widely used in various scenarios that require stable support and reset functions, such as automobiles, mechanical equipment and electronic products. In order to ensure the reliability and durability of its performance, effective stress relief heat treatment must be carried out during the spring manufacturing process.
Working principle of integrated box buckle shaped spring
The integrated box buckle shaped spring will deform when subjected to force and store elastic potential energy through deformation. After the external force is removed, the spring will quickly return to its original shape to ensure the normal operation of the equipment. The compact design of its internal structure enables the spring to provide a large elastic force in a limited space and can withstand a large load.
The necessity of stress relief
During the spring manufacturing process, the spring material will generate internal stress during cold processing or hot processing. These internal stresses may cause the spring to deform, fatigue or fail during use. Therefore, in order to ensure the performance and life of the spring, it must be subjected to stress relief treatment.
The main purpose of stress relief heat treatment is to reduce the residual stress inside the material through the heating and cooling process, thereby improving the stability and durability of the spring.
Process of stress relief heat treatment
Heating stage
The first step of stress relief heat treatment is heating. The spring is heated to a certain temperature in this stage, which is usually lower than the recrystallization temperature of the material. The common heating temperature range is 300°C to 500°C. The purpose of heating is to redistribute the internal stress inside the material and stabilize the lattice structure of the spring.
Heating rate: The heating rate should be uniform to avoid local overheating and deformation of the material due to sudden temperature rise.
Heating medium: Heating is usually carried out in air, furnace or oil bath. The specific medium selection depends on the material and processing equipment of the spring.
Holding stage
After the heating reaches the set temperature, it needs to be maintained for a period of time. This stage is called the holding stage. Its purpose is to allow the material to fully react at high temperature and complete the release of internal stress. The holding time is usually determined by the type, thickness and heating temperature of the material, generally between 1 hour and 4 hours.
Temperature control: Temperature control in the holding stage is very important. Too high or too low temperature will affect the treatment effect.
Time control: The holding time should be long enough to ensure that the stress is fully released, but not too long to avoid excessive oxidation or other adverse effects of the material.
Cooling stage
After the heating and holding stages are completed, the spring needs to be cooled. Cooling can be carried out in a furnace or naturally cooled in the air. The cooling speed should not be too fast to avoid new internal stresses caused by too fast cooling. The cooling process is usually controlled at a slow and uniform speed to ensure that the spring remains in a stable state throughout the process.
Cooling method: Different cooling methods will affect the final performance of the material. Air cooling is suitable for most cases, while some special materials may need to be cooled in an inert gas.
Ningbo Chaoying Spring Industry & Trade Co., Ltd. has nearly 20 years of experience in spring design and production, and is committed to providing users with high-quality, high-level integrated box buckle spring products.