For CNR Locomotive plant design and manufacture of a CNC gear peening equipment (CNC blasting machine)
2010.01.19
Shangahai Liangshi as a famous CNC shot peening equipment systems solutions provider leader, long-term commitment to the development and research of CNC shot peening equipment, shot blasting machine with CNC's core technology and independent brands; for Chinese locomotives industry professionals provide a high-tech and high quality CNC shot peening machines, shot peening equipment including gears shot peening equipment, gear CNC powerful peening machines, CNC gear strengthening equipment. Shanghai Liangshi has gotten most of the shot-peening technology applied to locomotive and rolling stock industry; the design and manufacture for a CNR locomotive and rolling stock works of CNC peening equipment has the following characteristics:
1、Programmable control of all of the shot-peening parameters;
2、Accurate monitoring of projectile flow and pellets reserves;
3、Precise positioning of the workpiece;
4、Fully monitoring of nozzle movement;
5、Automatic fail-safe protection.
Motorcycle gear strengthening CNC shot peening machines
Shot peening process is the use of high-speed movement of the projectile flow (shot peening machines supplied) on the impact of the metal surface makes surface produced plastic cycle strain layer, which led to the layer of micro organization occurred favourable of changes and makes surface aims into residual pressure stress field,surface of micro organization and residual stress is improve metal parts of fatigue fracture and stress corrosion (containing hydrogen crisp) fracture anti-force of two a strengthened factors, it improves reliability and durability obtained of parts .
Locomotive gear peening
Gear peening is a very common kind of application. Any size or design of the gear can be improved gear tooth root bending fatigue performance by shot peening.Gears generate load on the interface, at the contact point of tooth root zone formed under 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 carburized and shot-peening parameters, gears during carburizing and hardening of maximum compressive residual stress after falls on 170-230 ksi (1170-1600MPa).Peening carburized gears typically use high hardness projectiles (55-62 HRC).Of course, hardness smaller projectiles can be used depending on the situation (45-52 HRC), it produces a compressive stress is hard shot peening is about 50%.
By hammering, honing introducing 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.