大直径内螺纹铣削加工的振动试验及分析

Vibration Experiment and Analysis of Large Diameter Internal Thread in Milling

通过铣削加工大直径内螺纹试验,定量研究了大直径内螺纹铣削加工的切削速度、每齿进给量以及刀杆悬伸长度对振动的影响规律。采用正交试验法,选用硬质合金螺纹铣刀对45钢无缝钢管进行内螺纹加工,通过三向动态压电式平板测力仪和动态信号采集系统对不同工艺参数下的切削振动响应进行检测,运用Dyno Ware分析软件对采集的振动加速度和切削力信号进行处理和分析。结果表明,在合理范围内适当提升切削速度,可提高铣削加工大直径内螺纹的加工效率。铣削加工大直径内螺纹时,尽量选择较小的每齿进给量来提高机床刀具-主轴系统的稳定性,较短的刀杆悬伸长度有利于提高加工稳定性。

Through milling machining large diameter internal thread experiment,the influence of cutting speed,feed per tooth and overhang length of tool rod on vibration in milling of large diameter internal thread is studied quantitatively.Orthogonal experiment is used,carbide thread milling cutter is used to process the internal thread of 45 steel seamless steel tube,the vibration response of cutting under different technological parameters is experimented,through three-way dynamic piezoelectric plate dynamometer and dynamic signal acquisition system,the vibration acceleration and cutting force signal are processed and analyzed by DynoWare analysis software.The machining efficiency of milling large diameter internal threads can increase the cutting speed in a reasonable range.When milling large diameter internal threads,try to select a smaller feed per tooth to improve the stability of the tool-spindle system.When milling large diameter internal threads,the shorter overhang length of the tool rod is selected to improve the machining stability.