新型复频超声钻杆的研究

Study on a New Type of Complex Frequency Ultrasound Drill Pipe

复频超声加工是加工硬脆材料的有效方法之一,现有的超声加工机床中,钻杆和变幅杆多为同种材料采用螺纹结构连结,不同种材料,因其弹性模量不一致而限制了以多种材料螺纹连接制造超声钻杆的可能。针对该问题,以YT15硬质合金制作超声钻杆,运用ANSYS软件的模态与谐响应分析,分析了其在工作中的动态性能,以复频超声加工机床的实验为基础,并选用合适的制造工艺,设计了一种多材料复频超声钻杆,以实验验证硬质合金钎焊工艺在超声中的可能性。结果表明;新型超声钻杆可以在现有的超声机床上实现稳定、高效的超声加工,且验证了钎焊工艺是超声加工机床部件连接的一种有效方法。

Multifrequency ultrasonic machining is one of the effective methods to process hard and brittle materials. At present,drill rods and horns are mostly connected with the same material by thread structure. Because of the inconsistency of elastic modulus of different materials,the possibility of making ultrasonic machine tools with different materials is limited. Aiming at this problem,based on the experiment of the multi-frequency ultrasonic drilling machine tool and the modal and harmonic response analysis of ANSYS software,using YT15 cemented carbide to make the ultrasonic drill pipe and choosing the appropriate processing technology,a multi-material multi-frequency ultrasonic drill pipe which can be processed stably and efficiently is designed,its dynamic performance is analyzed,and the ultrasonic welding process of cemented carbide copper is verified in making the Multifrequency ultrasonic machining tool.