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采用HyperXtrude模拟软件对6063铝合金壁板进行连续挤压数值模拟,得到了挤压成形时金属的速度分布场。结果表明,金属在扩展模中的流动速度是不均匀的,速度最高的部位出现在与腔体进料口相对应的中间位置,速度由中间向两侧逐渐降低;改变导流模的结构可以有效的均衡金属流速,当导流模中的阻流块高度由8 mm降低至2 mm时,可使壁板产品截面的最大速度差由34.2 mm·s~(-1)降低至16.4 mm·s~(-1)。对铝合金壁板进行连续挤压工艺实验,得到合格的产品,验证了利用连续挤压扩展成形技术生产铝合金壁板的可行性。
HyperXtrude simulation software was used to carry out continuous extrusion numerical simulation of 6063 aluminum alloy siding to get the velocity distribution field of metal during extrusion. The results show that the flow velocity of the metal in the expansion die is not uniform, and the highest velocity occurs at the middle position corresponding to the inlet of the cavity, and the velocity gradually decreases from the middle to the both sides. The structure of the diversion die can be changed Effectively equalizing the metal flow rate, the maximum velocity difference of the siding section can be reduced from 34.2 mm · s -1 to 16.4 mm · when the height of the choke block in the guide die is reduced from 8 mm to 2 mm · s ~ (-1). The continuous extrusion process of the aluminum alloy wall panels was carried out to obtain the qualified products, which verified the feasibility of using the continuous extrusion expanding forming technology to produce the aluminum alloy wall panels.