Aluminum alloy plate material continuous extrusion method taking bar materials as blanks, and continuous extrusion machine

Abstract

The invention discloses an aluminum alloy plate material continuous extrusion method taking bar materials as blanks, and a continuous extrusion machine. The method comprises the following steps: A, dividing the blanks into multiple sections of bar materials, and connecting the head end face of the front-back adjacent bar materials with the tail end face of the front-back adjacent bar materials in each section of bar material; B, performing induction heating on the connected bar materials under the protection of inert gas through an induction device; and C, feeding heated bar materials into a rotary extrusion wheel, pressing the bar materials into a groove of the extrusion wheel through a pressing wheel, driving the bar materials through the groove in the extrusion wheel to enter a cavity and extruding to form a product through an extrusion mold in the cavity. According to the continuous extrusion method and the continuous extrusion machine, the problem that remarkable defects exist at the head-tail connection position of the bar materials during continuous extrusion of the magnesium alloy bar materials is solved; and the temperature of the magnesium alloy is increased by adopting induction heating under the protection of the inert gas, so the problems that the magnesium alloy has low plasticity at normal temperature and is broken when being pressed by the pressing wheel are solved.

Description

technical field [0001] The present invention relates to continuous extrusion technology and equipment for non-ferrous metals, in particular to a continuous extrusion method and continuous extrusion machine for magnesium alloy plates using bars as blanks, which are used for continuous extrusion of various non-ferrous metal profiles, wires and plates manufacturing. Background technique [0002] In the prior art, the specific gravity of magnesium alloy is light, and its specific strength is higher than that of aluminum alloy and iron. Therefore, without reducing the strength of parts, the weight of aluminum or iron parts can be reduced. The stiffness is close to that of aluminum alloy and steel, much higher than that of engineering plastics. In the elastic range, when magnesium alloy is subjected to impact load, the energy absorbed is half that of aluminum alloy parts, so magnesium alloy has good shock resistance and noise reduction performance, although magnesium alloy has Ma...

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Problems solved by technology

[0002] In the prior art, the specific gravity of magnesium alloy is light, and its specific strength is higher than that of aluminum alloy and iron. Therefore, without reducing the strength of parts, the weight of aluminum or iron parts can be reduced. The stiffness is close to that of aluminum alloy and steel, much higher than that of engineering plastics. In the elastic range, when magnesium alloy is subjected to impact load, the energy absorbed is half that of aluminum alloy parts, so magnesium alloy has good shock resistance and noise reduction performance, although magnesium alloy has Many advantages, but due to its poor plasticity, it is difficult to carry out plastic processing, so its production cost is high, which limits the application of magnesium alloys

[0003] Continuous extrusion is an energy-saving and environmentally friendly high-efficiency extrusion method. It has good economic and social benefits when applied to magnesium alloy extrusion. During the continuous extrusion method, the position of the joint between the billet and the billet cannot be fully welded during the extrusion process, and there will be obvious defects in the position of the joint on the product. This defect limits the application of the magnesium alloy continuous extrusion technology. The present invention It is to solve the problem of product quality defects caused by the position of the billet joint during magnesium alloy extrusion

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