期刊论文

Cutting Performance of Single cBN-WC-10Co Fiber

Mao, Cong(maocong315@aliyun.com)

中文

机械工程学报

0577-6686

2017

53

15

188-200

10.3901/JME.2017.15.188

51375061:国家自然科学基金 16A010:湖南省教育厅科学研究项目 2016kfjj05:湖南省普通高等学校重点实验室开放基金

本校为第一且通讯机构

利用放电等离子烧结技术和电火花线切割技术制备了尺寸为6 mm×0.8 mm×0.8 mm的CBN-WC-10Co复合材料纤维,刃磨后纤维前角为0°、后角为20°、刃口锋利平直,能够将这种CBN-WC-10Co纤维替代传统CBN磨粒并进行有序排布制备成有序化纤维刀具。开展了单纤维和单颗CBN磨粒在相同条件下单道切削TC4钛合金的对比试验。结果表明,CBN-WC-10Co单纤维的切削力比(Fn/Ft)、切削比能小,且加工质量可与CBN单颗磨粒相媲美;切削时纤维是以零前角对工件进行切削加工,且纤维的两侧面均与加工表面始终保持相互垂直,工件材料受到纤维的挤压作用而向纤维前端及两侧塑性流动大大减少,切削划痕两侧和切出端的材料堆积现象...

CBN-WC-10Co fibers with macroscopic dimensions of 0.8 mm×0.8 mm×6 mm are fabricated by using spark plasma sintering technique and wire electro-discharge machining. The rake surface and flank surface of the fibers are polished to form a zero rake angle and a 20° clearance angle by using diamond abrasive paper of 3 μm in mesh size. The fibers can be orderly arranged and be prepared oriented fiber cutter through replacing the abrasives in a grinding wheel. A comparative investigation is carried out on the machining mechanisms of TC4 titanium a...