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Nishida Spring Machinery learns the spring strengthening process

Source: Time:2015-03-07 17:11:28 views:

Dongguan Xitian Spring Machinery Co., Ltd. is a private technology enterprise integrating R&D, testing, manufacturing and sales of spring machinery and equipment. The types of spring machinery produced include computer spring machines, CNC spring machines, computer compression spring machines and other types of spring machinery equipment. , To become the new leader of Guangdong spring machinery manufacturers!
    credit to High-stress and lightweight design. In recent years, the weight of suspension springs has been greatly reduced. The stress of suspension springs of new models>1000Mpavery common. The service of the spring under such high stress has exceeded the limit that the material can withstand, so it must be supplemented by other strengthening methods (such as throwing/shot peening).  
    host manufacturer Very strict test standards are adopted for automobile suspension springs, the longest1Long test period70天(10周), which should be working under high stress conditions Suspension spring, once the surface is subjected to stress corrosion, it will cause corrosion fatigue failure. If the broken spring port punctures the tire, it may cause major safety and personal accidents.  
    toss< /span>/ Shot blasting is a suspension The most effective strengthening method for springs, the fatigue life of high-stress springs can be improved after proper shot peening5times or more, suspension spring throwing/The shot blasting is currently large Steel cut shots are used, and multiple shot blasting (different shot diameters) are commonly used in the process. The strength and depth of the spring surface compressive stress are important indicators to measure the effect of shot peening. The surface stress of good shot peening is at least-600MpaAbove, from the surface50umAvailable everywhere-800Mpa, the surface pressure of the stress shot peening spring can reach-800Mpaabove, from the surface50umreachable-1200Mpa 
    Currently, Well-known suspension spring manufacturers at home and abroad, such as Liaoyang Kesuo, etc., generally use a continuous pass-through roll cage strengthening equipment, and the workpiece is transported through a suspended conveyor chain. Each part must be in three shot blasting positions, and three shot blasting strengthening cycles are carried out according to the set time. After the strengthening is completed, the throwing head stops, the discharge door is opened, the strengthened workpiece is automatically lifted out, the new workpiece enters, and the new cycle starts. The production capacity of this equipment can reach500Pieces/hours .  
    leaf spring Strengthen 
    available A continuous pass-through shot blasting equipment performs individual strengthening treatments on the leaf springs one by one, exposing the geometric concave surface of the leaf spring to the high-speed shot flow. A typical model includes a throwing head for projecting the top of the leaf spring, and a throwing head is installed on the side to spray the left and right sides of the leaf spring at the same time.  
    this set The passing speed of the standard leaf spring strengthening equipment is10feet span>/ If you need a higher production speed, you can increase the number of polishing heads and adjust the motor frequency. Under working conditions, leaf springs are repeatedly affected by unidirectional bending stress, so they are sometimes stressed by stress. In the strengthening process, it is simulated that the leaf spring will be affected in the future use process"stress strengthening"In the case of normal;font-family:宋体;">, let it apply one in the direction of bearing the load"Static stress"At the same time , It is shot peened. After the strengthening is completed, the applied static stress is released. Experiments show that stress strengthening can further extend the service life of leaf springs than conventional strengthening.  
   round spring strengthening< /span> 
   round spring, because Its spiral geometry is more difficult to strengthen than flat surface leaf springs. In addition, the strengthening effect of the cross section of the round spring must be strictly evaluated, so as to fully understand the resistance of the round spring against fatigue fracture.  
    round spring They are individually sent to the shot blasting room via a continuous conveyor chain system. The shot blasting room is equipped with a set of parallel roller conveyors. While strengthening, the roller conveyors keep rolling, driving the circular spring to rotate while moving forward. This way of rotation allows the high-speed pill flow to pass between the rings of the circular spring and hit the metal surface of the inner ring, where the stress of the circular spring is the most concentrated.  
    For capacity For demanding applications, you can choose a strengthening device that can spray two round springs at the same time. The latest research and development result is based on the original shot blasting equipment, combined with multiple nozzles, used for more targeted and concentrated shot peening for the specific area of the round spring (stress concentration to please).
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