Analysis of the Process and Influential Parameters of Ultrasonic Welding of Carbon Fiber Reinforced Nylon 66 Without Energy Director
Ultrasonic welding of carbon fiber reinforced Nylon 66 without energy director is investigated and the effect of horn incline and gap between workpieces are analyzed.Experimental results show that the ultrasonic process consists coulomb friction,unsteady melting,equilibrium of material melting and outflow,and cooling down phases.Properly increasing weld pressure and time can prolong the equilibrium phase,whereas a collapse phase of T3'occurrs with weld time exceeding 2.9 s.With the horn incline above 4° or gap between workpiece exceeds 1.0 mm,the joint strength decreases significantly due to the loose contact at interfaces Ⅰ and Ⅱ.Comparing with the normal joint,the displacement curve for joint with horn incline displays multi-platform characteristic and the duration of equilibrium phase decreases for that of gap between workpieces.
ultrasonic weldingenergy directordisplacementhorn inclinegap between workpieces
万方数据
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