冷挤压刀具在高精度细长孔加工中的应用

机械加工中往往会遇到细长孔加工,细长孔加工相当困难,特别是对于尺寸精度和几何公差要求高以及表面粗糙度值较小的细长孔加工;因此,使用传统车削和研磨加工的难度就更为突显。为了有效地解决这一加工难题,设计了一款冷挤压刀具,通过冷挤压加工,使工件达到了精度要求,同时,工件表面发生了金相变形,使强度和硬度均优于工件原金相组织结构,在提高产品使用寿命的同时也提高了生产效率。

Application of Cold Extrusion Tools in High-precision Machining of Elongated Holes

In machining, elongated holes can often be met, but which are quite difficult to be machined, particularly when the requirements of dimensional accuracy and high precision geometrical tolerances are high, and surface roughness values are smaller, so grinding processing difficulty is more pronounced by using traditional turning. In order to effectively address the processing challenges, a cold extrusion tool was designed, by cold extrusion process, it met accuracy require- ments, and the workpiece surface metallurgical deformation happened, strength and hardness were better than original mi- crostructure of workpiece structure to enhance the life of the product and improve production efficiency.