微细金属纤维的刨削成形工艺

采用刨削加工法,利用多齿刀具在普通刨床上加工获得质量稳定的微细金属纤维,纤维长度为10-20mm,纤维直径可达100 μm以下.通过综合分析金属纤维刨削成形过程,研究切削参数对金属纤维刨削成形的影响规律,并得到加工金属纤维的合理工艺参数. 研究结果表明:在金属纤维刨削成形过程中,刀具参数和切削用量对纤维的质量有重要影响,较大的刀具前角和合适的刀具后角有利于纤维的成形,而背吃刀量对金属纤维的成形影响最大,切削速度和进给量的影响则不明显.在背吃刀量为0.04-0.06mm,切削速度为30-60m/min,进给量为0.72-1.44mm/str的条件下选择前角为30°,后角为8°的多齿刀具,可以获得质量稳定的微细铜纤维.

Study on Planing Formation of Fine Metal Fiber

Stable-quality fine metal fibers with a length of 10～22mm and a diameter of less than 100μm were fabricated by planning on a common planer with a multi-tooth tool. Then, by comprehensively analyzing the planing process and by investigating the effects of cutting parameters on the planing process, reasonable processing parameters were determined. The results show that both the tool parameters and the cutting parameters greatly influence the quality of metal fibers in the planing process, that a larger rake angle and an appropriate clearance angle of the tool are both favourable to the fabrication of metal fibers, that the back engagement has the greatest influence on the forming process, while the cutting speed and the feed rate have no obvious effect on the forming process, and that, at a back engagement of 0.04～0.06mm, a cutting speed of 30～60m/min and a feed rate of 0.72～1.44mm/r, fine copper fibers with stable quality can be fabricated using the multi-tooth tool with a rake angle of 30°, a clea-rance angle of 8°, a tooth pitch of 0.3mm and a tooth height of 0.2mm.