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Abstract: Linear
friction welding (LFW) machine is a key equipment for researching and
producing higher thrust-weight ratio aero-engines .The most important
part of the machine is a reciprocating vibration system. When the
driving system reciprocates, the fixed clamping device system will move
unavoidably. The movement is elastic or mechanical. Dynamic theoretic
model of LFW is established to study the influence of the elastic
vibration of the fixed clamping device system on the driving force,
mechanical power, heat generation power of the machine. The results show
that the rigidity has a great influence on the process of LFW. The
elastic movement decreases the heat power at friction interface. There
is a turning point of the influence of friction force on system output
power and heat generation power if elastic distortion exists, both of
the powers will decrease if friction force is too great. So the rigidity
of the clamping device in FLW machine should be ensured. The research
provides theoretic basis for designing LFW machine.
Key words: Linear
friction welding machine Reciprocating system Friction heat
Elastic vibration
CLC No: TG425
国防科技预研基金(99J18.3.5.HK0323)和航空科学基金(00H53081)资助项目.
Received 20030414, received in revised form 2003610 |