摘要
文章针对多腔型材在压弯过程中产生截面畸变缺陷问题,以6005A多腔挤压型材为研究对象,从填充材料选择、填充方式等方面对压弯后成型效果进行研究。试验结果表明,四种填充材料(PA6、PP、PVC、PU)中PA6材料具有最高的压缩屈服强度,PU材料压缩屈服强度最低;结合填充材料力学性能、填充后型材增重情况以及生产成本等因素综合考虑后,PP板被选择作为有效填充材料。多腔体型材经填充PP板后可有效改善中部大宽厚比型腔截面畸变情况,右侧型腔经仿形PP板填充后右该型腔界面畸变已基本消除。经PP板填充后左3腔体由不填充时最大凹陷深度8 mm减小至2.5 mm。此外,合适的填充方式对最终成型效果具有重要影响。考虑大生产便利性和填充材料加工成本,最终得到最佳填充方案为方案5,即中间两大宽厚比腔体共填充3块PP板,而右侧边部型腔利用细长PP板条填充凹槽内替换仿形PP板填充解决该型截面畸变。经方案5填充压弯后其截面最大凹陷值为0.9 mm,满足下凹深度不超过1.5 mm的设计要求。
In this paper,aiming at the problem of cross-section distortion defect of multi-cavity profile in the bending process,taking 6005A multi-cavity extruded profile as the research object,the forming effect after bending was studied from the aspects of filling material selection,filling mode and so on.The test results show that PA6 material has the highest compression yield strength and PU material has the lowest compression yield strength among the four filling materials(PA6,PP,PVC,PU).After considering the mechanical properties of filling material,the weight gain of filled profile and production cost,PP plate is selected as an effective filling material.The cross-section distortion of the middle cavity with large width-thickness ratio can be effectively improved after the multi-cavity profile is filled with PP plate,and the interface distortion of the right cavity is basically eliminated after the right cavity is filled with profiling PP plate.After filling with PP plate,the maximum depression depth of the left 3 cavities decreased from 8 mm to 2.5 mm.In addition,the appropriate filling method has an important influence on the final molding effect.Considering the convenience of large-scale production and the processing cost of filling materials,the best filling scheme is scheme 5,that is,three PP plates are filled with two large width-to-thickness ratio cavities in the middle,while the right side cavity is filled with slender PP lath to fill the groove instead of profiling PP plate to solve the section distortion.After filling and bending in scheme 5,the maximum depression value of the cross section is 0.9 mm,which meets the design requirement that the depth of the depression does not exceed 1.5 mm.
出处
《科技创新与应用》
2022年第19期68-71,共4页
Technology Innovation and Application
关键词
6005A铝合金
压弯
多腔型材
截面畸变
6005A aluminum alloy
bending
multi-cavity profile
section distortion
