摘要
航空发动机中所使用的钛合金弯管在加工时其内表面会产生微裂纹、褶皱等缺陷,用传统的研磨工艺难以实现对弯管内表面的抛光处理,而磁力研磨加工工艺却可以很好地解决这一难题。利用磁力线可以穿透钛合金弯管的特性,磁性磨料可以在外加磁场的作用下压附在弯管内表面,并随磁场高速旋转与弯管内表面产生相对运动,从而达到研磨钛合金弯管内表面的目的。本文对磁研磨法加工钛合金弯管内表面的研磨原理及磁性研磨颗粒的受力情况进行了的分析,并通过详细的试验研究得出:钛合金弯管内表面经过研磨后,原有的微裂纹、褶皱等缺陷得到明显改善,表面粗糙度值由R_a0.35μm降低到R_a0.12μm,验证了磁研磨法对钛合金弯管内表面的研磨抛光起到的良好效果。
Micro-cracks,wrinkles and other defects will be produced on the inner surface of titanium alloy elbow pipe used in the aeroengine,which is difficult to be polished by traditional grinding process.However,magnetic abrasive machining process can solve this problem very well.By using of the characteristic that magnetic field lines can penetrate the titanium alloy elbow pipe,magnetic abrasive will be attached to the inner surface of titanium alloy elbow pipe and produce a high-speed rotation under the action of the external magnetic field in order to achieve the purpose of grinding inner surface of the titanium alloy elbow pipe.The principle of magnetic abrasive finishing process inner surface and the force of magnetic abrasive particles is analyzed.And the detailed experimental proves that micro-cracks,wrinkles and other defects on the inner surface of titanium alloy elbow pipe can be removed very well and the roughness be changed from R_a0.35μm to R_a 0.12 um taking advantage of magnetic abrasive finishing machining process.It is verified that the magnetic magnetic abrasive finishing machining method is effective to grind and polish the inner surface of titanium alloy elbow pipe.
出处
《航空制造技术》
2015年第3期61-63,共3页
Aeronautical Manufacturing Technology
关键词
磁力研磨
钛合金弯
表面缺陷
旋转磁场
Magnetic abrasive finishing process
Titanium alloy elbow pipe
Revolving magnetic field
