A person of extraordinary powers is overcome can ^PT technology fights exhaustion to produce medium effect in aviation

A person of extraordinary powers is overcome can the purpose that PT metal machines uses compound energy to machine namely, reduce workpiece surface surface roughness to be worth substantially, reduce or eliminate the stress such as treatment knife mark and abrade to center a dot, reduce stress to focus coefficient and breach effect, refine the metallic grain, appearance that improves work at the same time microscopical hardness, eliminate pull stress, beforehand buy presses stress, improve the fatigue performance of workpiece finally, prolong the fatigue life of workpiece. In the tradition " figuration " in making, we often value workpiece exterior appearance only, do not pay attention to the integrated and mechanical function such as fatigue function, and a person of extraordinary powers is overcome can after PT technology applies at the foundation to machine, the exterior quality of metallic workpiece and mechanical function got promotion, among them exterior surface roughness is versed in than the Jinqiejia such as traditional turning, milling means improves 3 technologies grade, can amount to Ra0.

2 the following; Workpiece surface is microscopical at the same time hardness raises 20% above; Beforehand buy presses stress goodly, eliminate the exterior knife grain of workpiece, stress to wait for blemish centrally; The corrosion resistance of workpiece raises 40% above, wearability raises 50% above, a person of extraordinary powers is overcome can after PT is machined, can make life of spare parts exhaustion raises a few times. Fighting exhaustion to make is integrality of control workpiece surface, mix for main criterion with fatigue function the advanced production technology that improves fatigue strength, it is to be below the premise that does not change hardware data and interfacial size, through the organization of material and stress are being changed to distributing in workmanship process condition improves the production technology of component exhaustion life. A of this kind of technology outstanding characteristic is the structure that does not change a part and material, do not add the weight of material, but can improve material exhaustion life substantially. Fight exhaustion to make with figuration production photograph is compared, the evaluation machines quality to agree with blueprint paper not only, still must agree with design function, in assure work measure, form while tolerancepublic errand is eligible, pay attention to the fatigue function of workpiece more. A main evaluation index in fighting exhaustion to make is workpiece surface integrality, exterior integrality is the floorboard of character of geometry of the surface after component is machined and exterior physics property, exterior geometry character includes exterior surface roughness, ripple to spend, the technical index such as appearance of grain, scrape, geometry and dimension deviation, if exterior surface roughness is poor, have knife mark, the stress that forms each in workpiece surface centers a dot, increased stress to focus coefficient and breach effect [5] (graph 1 it is Ra0 of exterior surface roughness.

015 workpiece surface is in the true condition after three-dimensional enlarge) , also formed the bud source of student of fatigue crackle. The microcosmic tissue that exterior physics property includes to express facing, plasticity is out of shape, recrystallization, microscopical concentration of hardness, leftover stress, microcosmic crackle, stress, belong to interior to machine effect. A person of extraordinary powers is overcome can the purpose that PT metal machines uses compound energy to machine namely, reduce workpiece surface surface roughness to be worth substantially, reduce or eliminate the stress such as treatment knife mark and abrade to center a dot, reduce stress to focus coefficient and breach effect, refine the metallic grain, appearance that improves work at the same time microscopical hardness, eliminate pull stress, beforehand buy presses stress, improve the fatigue performance of workpiece finally, prolong the fatigue life of workpiece. CNC Milling