ABS Plastic And Aluminum Alloy Induction Welding Technology Research

In today’s society the plastic material has been widely used in the areas of economic life, from daily necessities to cutting-edge science plastic figure, be made into various shapes and plastic parts and other materials, due to the processing, plastic parts design, work environment and other reasons, a lot of products with complex structure, not a lot of time processing, and by welding method can take multiple seamless connection parts together to form a complete parts, so the plastic and plastic, plastic and other materials of connection technology has very important value for thermoplastic plastic welding technology has been more and more widely used, plastic welding is an effective method for permanent connection plastic parts. Induction welding the extent of the weldability of covers the full range of engineering plastic and hard to use other methods of welding or high polymer filling compound. As the high strength plastic in significant growth in a wide range of industries, such as car manufacturing industry, packaging industry, medical equipment manufacturing, etc. Induction welding is becoming the plastic connection method is important one annulus.This experiment mainly adopt ABS plastic, made in the welding of plastics and plastic size 150 mm x 40 mm x 2 mm plate, made in plastic and aluminum alloy welding size 150 mm x 30 mm x 2 mm board piece, on models for LK- 25 induction welding machine for plastic and plastic, plastic and aluminum lap welding. The induction welding process takes less, heating speed, the pressure under the action of molten plastic can get good spread out on the connection interface form a joint. Uniform lap joint is smooth, not grooved, flash, top and bottom plate connection, no defects such as porosity, welding, induction slip. Orthogonal optimization design, the tensile shear strength of lap joint as the main standard to study the effect of welding parameters on the mechanical properties, main influencing factors of heating temperature, heating time, the current heat preservation, heat preservation time and pressure. And obtained the optimal combination of parameters: under the same pressure, the optimal parameters of plastic and plastic welding for the heating current 800 a, heating time of 10 s, insulation current 300 a, the maximum tensile shear load of 2.70 kN. Plastic and aluminum, the optimal parameters of the thermal current 900 a, heating time 7 s, 2 s heat preservation time, maximum tensile shear load of 1.02 kN.Lap joints using scanning electron microscope analysis, in the process of plastic and plastic welding, the induction heat, heat conduction and pressure, under the joint action of plastic board and induction content in addition to the mechanical connection between, also occur on the connection interface infiltration phenomenon, formed the solidified layer again. Act as sensors of the edge of the aluminum alloy plate plastic adhesive. During the welding process in the plastic and aluminum plastic sheet and aluminum alloy plate connection interface in addition to the mechanical connection, also occur on the connection interface infiltration phenomenon, formed the solidified layer again, carbon and aluminum in solidified layer again there is a small number of diffusion phenomenon. Plastic by using infrared spectrum analysis of the lap joint found at the interface between the connection, to generate a new chemical group.Plastic and plastic there are three kinds of lap joint fracture mode, in the heat affected zone of fracture is more, the strength of the joint strength is higher than the plastic. Less away from weld fracture. Third disconnection mode in lap position directly, this is the parameter selection problem, should avoid this kind of form. Plastic and aluminum lap joints fracture mode has two kinds, in the heat affected zone of fracture, illustrate the strength of the joint strength is higher than the plastic. The second mode of disconnection in lap position directly, the cause of this kind of form for the heating current is too small, the heating time is too short, aluminum alloy plate is passed to the plastic hot enough to make enough of the plastic melt, under the pull of the smaller then appear to break phenomenon, this kind of fracture is when the heating current is lower than 850 a common form of fracture, even heating of aluminum plate after preheating but in 850 a electricity flow in a short period of time in a large area of the plastic or not in the lap zone spreading, stop heating part of the aluminum melting and solidification to make soon, embedded is not yet in the solidification of plastic instead affects the quality of the joint.