单点渐进成形工艺参数对铝合金圆锥台表面粗糙度的影响

Effect of single point incremental forming process parameters on surface roughness of aluminum alloy conical table

表面粗糙度是影响渐进成形零件质量的关键因素之一,为了探究工艺参数对零件表面粗糙度的影响,采用单点渐进成形技术对5052铝合金板料进行成形实验,研究工艺参数轴向进给量、主轴转速、进给速度对圆锥台表面质量的影响,并使用粗糙度仪测量外表面粗糙度R_(a)值。实验结果表明:降低轴向进给量可以改善零件表面质量;随着主轴转速增大,零件粗糙度R_(a)呈先减小后增大趋势;进给速度对粗糙度R_(a)影响较小,随着进给速度增大,粗糙度R_(a)呈先减小后增大趋势,受零件尺寸限制,进给速度超过2817 mm·min^(-1)时,内表面“鱼鳞纹”和粗糙度R_(a)几乎没有变化。

Surface roughness is one of the key factors affecting the quality of incremental forming parts.In order to explore the influence of process parameters on the surface roughness of parts.In this study,single point incremental forming technology was used to form 5052 aluminum alloy sheet.The effects of process parameters such as axial feed,spindle speed and feed speed on the surface quality of conical table were studied,and the roughness R_(a)value of outer surface was measured by roughness meter.The experimental results show that reducing the axial feed can improve the surface quality of parts.The roughness R_(a)value of parts decreases first and then increases with the increase of spindle speed.The feed rate has little effect on the roughness R_(a)value,the roughness R_(a)value decreases first and then increases with the increase of feed rate.Due to the limitation of the part size,the'fish scale'and roughness R_(a)value of the inner surface are almost unchanged,when the feed speed exceeds 2817 mm·min^(-1).