低应力疲劳裂纹可控式精密分离技术

Low-stress fatigue crack controllable precision cropping technology

金属棒、管料下料工艺被广泛应用于装备制造业、汽车工业、航天工业和轴承工业。传统棒、管料下料技术存在生产效率低、材料利用率低和断面质量差等缺点。为实现"既平又快"的精密下料,提出低应力疲劳裂纹可控式精密分离技术。总结了低应力疲劳裂纹可控式精密分离技术的原理,针对应用该技术的6种相关工艺在工作原理、装备设计、下料效率、断面质量、适用范围及工艺优缺点等方面进行了探讨。最后总结出低应力疲劳裂纹可控式精密分离技术适用于直径为Φ2~Φ70 mm的棒、管料下料。相比于传统下料技术,低应力疲劳裂纹可控式精密分离技术下料效率高、断面倾斜度小、精度高。提出了该技术进一步研究的方向。

The cropping technology of metal bar and tube is widely used in equipment manufacturing industry,automobile industry,aerospace industry and bearing industry.There exist some disadvantages in traditional cropping technology of bar and tube such as low production efficiency,low material utilization rate and poor section quality.To achieve"both flat and fast"precise cropping,low-stress fatigue crack controllable precision cropping technology was proposed.The principle of low-stress fatigue crack controllable precision cropping technology was summarized and the working principle,equipment design,cropping efficiency,section quality,application scope,advantages and disadvantages of six related processes applying this technology were discussed.Finally,it was summarized that low-stress fatigue crack controllable precision cropping technology was suitable for the cropping of bar and tube with diameter ofΦ2-Φ70 mm.Compared with the traditional cropping technology,the low-stress fatigue crack controllable precision cropping technology has higher cropping efficiency,lower section gradient and higher precision.The further research direction of this technology was proposed.