铝合金薄壁筒形零件尺寸稳定化加工工艺

Dimensional Stability Machining Process for Aluminum Alloy Thin-walled Cylindrical Part

通过对铝合金挤压毛坯施加微量压缩塑性变形,降低或消除挤压毛坯在成形过程中产生的残余应力,从而提高铝合金薄壁筒形零件的尺寸稳定性。结果表明,对铝合金薄壁筒形件的挤压毛坯施加的变形量达到1%以上时,即可明显提高零件的尺寸精度,当变形量达到2%时,零件的圆度误差变化量趋于稳定。采用微量压缩塑性变形工艺是实际生产中提高薄壁铝合金筒体件尺寸稳定性的一种既方便又有效的工艺。

In order to reduce or eliminate residual stress and improve dimensional accuracy and stability of aluminum alloy thin-walled cylindrical parts,the compression plastic mini-deformation process exerted on the blank made by hot extrusion process was adopted.The process experimental results show that when the deformation rate exerted on the blank is more than 1%,the dimesional accuracy of aluminum alloy thin-walled cylindrical parts can be improved significantly,while the deformation rate exerted on the blank is more than 2%,the roundness tolerance variation of aluminum alloy thin-walled cylindrical parts can tend to be stable.The compression plastic mini-deformation process is one of both effective and convenient process for improving dimensional accuracy and stability of aluminum alloy thin-walled cylindrical parts in actual production.