Theoretical Research Of Groove Deformation Zone Of Wide Copper Strip Continuous Extrusion

Continuous extrusion technology is nonferrous plastic process technology of green, energy-saving, effective, which is developed in the 1970s. Now it has become more mature technology.Because copper and its alloy have high distortion temperature, big distortion strength, easy to be oxygened when temperature is higher, there are many technical difficulties about plastic forming mechanism, technic parameters, die construct and so on. Great disparity exists between our design and foreign country's in facility life and energy needing. Continuous extrusion technology in the production has a wide range of applications, so the theoretical analysis has become particularly important. It is necessary to improve the design of tool and die by using advanced theoretic analysis and calculate method.In this dissertation, we use DEFORM-3D software as the tool to simulate and analyze, and establish the finite element analysis model of deformation process, which is based on rigid plastic/rigid viscoplastic FEM theory. We calculate and analyse the power parameter of continuous extrusion, and we do experimental investigation to the pressure of compaction wheel.According to the simulating analysis of wide copper strip continuous extrusion, the results show that the friction is as driving forces, the most metal of deformation is in 3-orientation compressive stress, the metal stress reduction trends from center to edge. The metal's temperature is about 670℃when the metal contact with the abutment. The torque is keeping at 7.1×10E7 N-mm when the continuous extrusion is stability.According to analyzing the flowing velocity of metal, temperature and extrusion wheel's torque on simulating of different extrusion wheel velocity, the results show that the extrusion wheel optimalizing velocity is 6 rpm to the continuous extrusion.According to the simulating analysis of the different compaction wheel reduction, the results show that the optimalizing reduction is 6 mm to the continuous extrusion from analyzing point's effective stress, effective stain and extrusion wheel's torque. Otherwise, we establish mathematic model of the pressure in the rolling zone of wide copper strip continuous extrusion. We can obtain the result of calculating the compaction wheel's pressure when the reduction is 6 mm. The mathematic model's result, simulating result and experiment result are basically consistance. We initiativly establish the calculating simplified unstable model to the unsuccessful problem continuous extrusion.According to the simulating analysis of the different wheel groove shapes, the results show that the extrusion wheel's torque of square groove with boss is unstabe, the extrusion wheel is subject to heavy wearing. Round groove with slot gives the abutment to great impulse force and the abutment is subject to heavy wearing. Comprehensive analysis, square groove with boss and round groove with boss are fit for continuous extrusion.In conclusion, according to analyzing the simulation results, the technics parameters and die structure size should be selected reasonably, which can realize wide copper strip continuous extrusion forming, and try our best to advance the productivity and save energy to a higher level.