特殊深孔的推镗滚压加工

车用、工程机械和矿用支架液压缸长径比大,大多属特殊深孔,而内孔的加工是关键工序,对此,提出推镗-滚压组合加工工艺。设计专用镗滚挤压组合刀具,前面作粗镗扩,中间精铰镗,后面滚挤压和修圆的作用。滚挤压强迫表面金属产生弹塑性变形,在工件表面形成冷作硬化层,既提高工件的尺寸精度,又提高表面质量和耐磨性,且一次装夹,一次加工成型,生产率高,质量稳定,废品率低。

The deep hole boring and rolling processing of special

The hydraulic cylinder of automobile、engineering machinery and the bracket for mining have large length diameter ratio, mostly belong to the special hole, and processing the hole is a key process, in this regard, puts forward the boring and rolling combined process. Design of special boring and rolling combined extrusion tool, the front for rough boring reaming boring and expanding, middle, behind the roll extruding and rounding function. Burnishing force surface of metal plastic deformation, cold hardening layer is formed on the surface of the workpiece, not only to improve the dimensional precision of the workpiece, and improve the surface quality and wear resistance, and a fixture, a molding, high productivity, stable quality, low rejection rate.