Switch flat spring

Solution for shape distortion of switch flat springs
Switch flat springs are key components of many devices and instruments. Their main function is to provide a stable switch operation feel and ensure the normal operation of the equipment. However, due to various reasons, flat springs may have shape distortion problems during production and use, which will affect the performance of the switch and the reliability of the equipment. Ningbo Chaoying Spring Industry & Trade Co., Ltd. has precision CNC spring forming machines from Japan and Taiwan, dozens of fully automatic spring forming machines and various testing equipment, and is committed to producing high-quality flat springs.
Shape distortion of switch flat springs can be caused by many factors, mainly including the following aspects:
Material unevenness
The quality and uniformity of the material directly affect the shape stability of the flat spring. If the material has problems such as uneven thickness and hardness, the shape distortion of the formed spring will occur.
Processing process problems
Errors in the processing process may cause spring shape distortion. Common process problems include mold wear, uneven stamping, uneven heat treatment, etc.
Improper heat treatment
Uneven temperature control during heat treatment or inaccurate heat treatment time will cause changes in the shape and performance of the spring, resulting in shape distortion.
Stress concentration
During the production process, the spring may encounter stress concentration problems. For example, bending or twisting of the spring may cause local stress concentration, which may cause shape distortion.
Storage and transportation conditions
The spring may be squeezed or impacted by external forces during storage and transportation, causing its shape to change.
Detection method
In order to effectively solve the shape distortion problem of switch flat springs, accurate detection is required first. The following are some common detection methods:
Dimension measurement
Use high-precision measuring instruments such as three-dimensional measuring machines or laser rangefinders to measure the dimensions of the flat spring, including its length, width, and thickness, to ensure that it meets the design requirements.
Shape inspection
By using a microscope or a high-resolution camera, check whether the shape of the spring meets the design standards, especially focusing on the shape of the edges and curved parts.
Stress analysis
Use technologies such as finite element analysis (FEA) to simulate the stress distribution of the spring under working conditions and find possible stress concentration areas.
Heat treatment detection
Check whether the temperature and time during the heat treatment process meet the standards, and verify the organizational structure of the spring by physical or chemical methods.
Solutions
Optimize material selection: Select high-quality raw materials to ensure that the thickness, hardness and uniformity of the materials meet the requirements. Regularly evaluate suppliers to ensure the consistency and reliability of materials.
Improve processing technology
Mold maintenance: Regularly check and maintain stamping dies to prevent processing errors caused by mold wear.
Process parameter adjustment: Optimize the parameters of stamping and forming processes, such as pressure, speed, etc., to improve processing accuracy.
Automated production: Use advanced fully automatic spring forming machines to reduce errors caused by manual operation.
Control the heat treatment process
Temperature control: Strictly control the temperature during the heat treatment process and use high-precision temperature control equipment.
Uniform heating: Ensure the uniformity of the spring during the heating process to avoid shape distortion caused by uneven heat.
Cooling rate: Control the cooling rate to prevent shape changes caused by uneven cooling.
Reduce stress concentration
Design optimization: In the design stage, optimize the geometry of the spring to reduce stress concentration areas.
Fine processing: During the processing process, control the accuracy of cutting and forming to reduce local stress concentration.