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小直径深孔加工的尺寸公差和光洁度,是个较难解决的问题,我们曾作过多次尝试,采用多柱挤压加工后,方解决了此问题。一、基本原理孔的挤压加工是一种无切屑的强化光整加工方法。根据金属变形的理论,在外力作用下,被加工金属的原子间距离会暂时发生变动,或晶粒间产生滑移。当外力达到一定数值时,除产生弹性变形外,还会有塑性变形(即金属的残余变形)。由于塑性变形的结果,不仅工件形状有了变化,而且金属的组织结构和物理性能也会有变化,使金属组织紧密,晶粒变细,晶粒
Small diameter deep hole machining size tolerance and finish, is a more difficult problem to solve, we have made many attempts, the use of multi-column extrusion processing, the parties to solve this problem. First, the basic principle Hole extrusion processing is a no chip sharpening finishing method. According to the theory of metal deformation, under the action of external force, the distance between the atoms of the metal to be machined will change temporarily or slip occurs between the grains. When the external force reaches a certain value, in addition to elastic deformation, there will be plastic deformation (ie metal residual deformation). As a result of plastic deformation, not only the shape of the workpiece has changed, but also the metal structure and physical properties will change, the metal structure close, grain refinement, grain