锋利型双面槽数控刀片抛光支撑面刀尖磨损研究

Wear Study on Polishing Support Surface and Tip of Sharp NC Blade with Double Groove

通过研究锋利型双面槽数控刀片在抛光时支撑面的尖角磨损现象,分析了抛光刀片的受力并得到其运动模型,得出尖角磨损的一个重要原因是抛光刀片高频率、周期性的相对限位槽运动,设计了两种抛光夹具进行抛光测试验证,探索抛光夹具限位槽间隙、径向位置以及定位销孔间隙对刀片支撑面刀尖磨损的影响规律。实验得出:限位槽间隙对锋利型双面槽刀片支撑面刀尖磨损产生正相关的影响,而当限位槽间隙达到0.6mm后,其正相关的影响减缓;同一限位槽间隙的不同径向位置抛光时对刀尖磨损无明显影响;定位销孔间隙对刀尖磨损有明显的影响,定位销孔间隙越大,刀尖磨损越严重。本研究可指导其他锋利型产品的抛光夹具设计,抛光夹具的限位槽双边间隙设计在0.2~0.4mm为宜,定位销孔略大于支撑盘定位销即可。

This paper analyzes the force and motion model of the polishing blade through the sharp angle wear phenomenon of the support surface of the sharp double-sided groove NC blade during polishing,and concludes that an important reason for the sharp angle wear is the high-frequency and periodic relative limit groove movement of the polishing blade,and designs two kinds of polishing fixtures for polishing test verification,exploring the gap between the limit groove of the polishing fixture.The influence of radial position and clearance of locating pin hole on the wear of blade support surface and tip.The experimental results show that the clearance of the limit slot has a positive correlation effect on the wear of the support surface and the tip of the sharp double-sided slot blade,and when the clearance of the limit slot reaches 0.6mm,the positive correlation effect slows down.The different radial positions of the same limit groove gap have no obvious effect on the tool tip wear when polishing.The clearance of locating pin hole has obvious influence on tool tip wear.The larger the clearance of locating pin hole is,the more serious the tool tip wear is.This study can guide the design of polishing fixtures for other sharp products.The double-sided gap of the limit groove of the polishing fixture should be 0.2~0.4mm,and the positioning pin hole should be slightly larger than the positioning pin of the support plate.