At present, fortified equipment that improves the predecessors's procedures and is more sophisticated and has synchronous monitoring and control functions has also been widely used in industrial spring manufacturing to achieve real-time monitoring of process parameters and display of results. Today, "touch screen" and computer-based The manipulation interface replaces the original keys and indicators. Experiments have confirmed that stress hardening can extend the life of the leaf spring even further than conventional reinforcement.
A shot blasting device for a continuous chain conveyor system is used for plate spring reinforcement. A plurality of throwing heads are aligned with the upper surface of the leaf spring and the left and right sides are projected.
The strengths of the previous week were high speed and high output. They were more suitable for the reinforcement of parts with high production demands such as leaf springs and springs. They could project to more areas in a shorter period of time, and allow more parts to be sprayed. Saturation intensity is reached quickly. Spring strengthening is a highly controllable process technology. Reinforcement equipment has added some necessary equipment to ensure high-quality process, such as vibrating screen, used to screen the projectile size, ensure that the pellet size is uniform; the frequency conversion motor of throwing head controls the injection speed; the speed controller of the conveyor chain can Adjust the injection time. Coverage (100%, 200% or greater) depends mainly on visual inspection, while strength is measured using representative industrial spring steel test pieces (ie, Almen test piece)
The strengthening process utilizes the impact of a high-speed moving projectile stream on the metal surface to generate a plastic strained layer on the surface, thereby resulting in a favorable change in the microstructure of the layer and introducing the surface layer into a residual compressive stress field. The control system can not only display all kinds of monitored process parameters synchronously, but also allow operators to write “programs” on behalf of related parameters.
Circular spring reinforcement
A continuous pass type shot peening apparatus can be used to perform a single, one-to-one reinforcement treatment of the leaf springs, exposing the leaf springs to geometric concave surfaces exposed to high velocity pellets. During the strengthening process, the simulated leaf spring will be subjected to "stress intensification" during its subsequent use, allowing it to be shot peened while applying a "static stress" in the direction of the load. Strengthening is a "cold treatment" process, which is different from the thermal processing of metal parts at high temperatures. The latest R&D results are based on the original shot-peening equipment that incorporates multiple nozzles for shot-peening that is more targeted and focused on specific areas of the circular spring (focusing on stress concentration). The development of technology is not limited to strengthening the mechanical capabilities of equipment. The expectation that the system can provide simultaneous monitoring, display, documentation, and other functions is also increasing daily. It aims to improve the effect and accuracy of industrial springs. The compressive stress layer typically extends to a depth of 0.005" to 0.030" below the surface of the material. The pass rate of this standard leaf spring-reinforced equipment is 10 feet per minute. If a higher production speed is required, the number of throwing heads can be increased and the motor frequency can be adjusted. This way of rotation allows the high-speed pills to flow smoothly through the rings of the round spring and onto the metal surface of the inner ring, where the stress of the circular spring is most concentrated. In order to facilitate the daily maintenance of the maintenance staff and the solution of problems when the equipment is in error, the control system of the equipment can also provide a guidance graphic, listing all the entrances or exits in the machine and displaying their current conditions. The latest control system can also meet the needs of security, so that different positions of people, system administrators, engineers, maintenance staff, operators, there are four different machine control permissions.