Gear / gear axis CNC machine powerful shot
Shanghai Liangshi Machinery Co., Ltd. as a famous surface treatment system solutions provider leader, long-term commitment to the development and production of shot peening equipment, shot peening equipment in the field has the core technology and independent brands; for the rolling stock industry specializing in hi-tech and high quality surface treatment equipment, including shot peening equipment, blast cleaning equipment, shot blasting equipment, polishing equipment. Shanghai Liangshi machinery has been applied to the rolling stock industry to grasp the vast majority of shot peening technology; this is a CNR Locomotive plant design and manufacture of CNC shot peening equipment has the following characteristics:
1、all shot peening parameters to implement programmable control;
2、precise monitoring traffic and pellets projectile reserves;
3、the exact positioning of the workpiece;
4、completely control the movement of the nozzle;
5、automatic fail-safe protection.
Locomotive gear CNC shot peening equipment
Peening process is the use of high-speed movement of the shot stream (shot peening machines supplied) on the impact of the metal surface leaving the surface layer of plastic cyclic strain, which led to favorable changes in the microstructure of the layer and the surface of purpose into the occurrence of residual compressive stress, microstructure and residual stress is to improve the fatigue fracture surface and stress corrosion of metal parts (including hydrogen embrittlement) fracture resistance of two reinforcers, with the result that the reliability and durability of the parts is improved.
Locomotive gear peening
Gear peening is a very common kind of application. Any size or design of the gear can be improved by shot peening gear tooth root bending fatigue performance. Load the contact surface of the gears in the tooth root region of the contact point is formed under a bending stress.
Gears after carburizing or surface hardening usually have to be shot peening. Increasing the surface hardness of the compression stress is formed in the same proportion. Depending on the parameter carburizing and shot peening, the maximum compressive residual stress gear carburizing and hardening treatment after falls 170-230 ksi (1170-1600MPa) between. Peening carburized gears typically use high hardness projectiles (55-62 HRC). Of course, also be used according to the hardness of smaller projectile (45-52 HRC), which generates a compressive stress of about 50% hard shot peening.
By hammering, honing to introduce a compressive stress, so that the tooth portion is formed against the contact fatigue is the best method. Peening formation of small concave surface finishing, make contact load through spread out over a large surface, thereby reducing contact stresses.