摘要
爬行现象是数控机床在低速运动时一种常见而不正常的现象。这种现象对机床的稳定性有直接影响,从而降低了工件的位置精度,增大了表面粗糙度,对机床造成损害。在ADAMS平台中,应用集中参数离散化的方法将数控机床的机械传动系统简化成无弹性的集中质量和无质量的弹簧所组成的单自由度弹簧质量阻尼振动系统,分析爬行机理,确定导致数控机床产生爬行的各个影响参数。运用调整数控机床爬行因子、外加振动源和施加PID控制小系统的方法来分析这三种方法对爬行的改善情况。最终得出结论是利用PID控制方法完全能够抑制爬行。
Crawl phenomenon of CNC machine tools in low-speed movement is a common and normal phenomenon. This phenomenon has a direct impact on the stability of the machine tool, which reduces the position accuracy andincreases surface roughness of the workpiece, even damages the machine tool. In the ADAMS platform, the application of lumped parameter discretization method simplified the mechanical transmission of CNC machine tools into a single degree of freedom spring mass damping vibration system with concentrated mass inelastic and springs without mass, and then analyzed the crawling mechanism to find out the effect parameters which causescrawl phenomenon of machine tool. By using adjusting CNC machine tool crawling parameters, plus vibration source and PID toanalyzeimprovement of the crawling. Theconclusion is that the use ofPID controlmethod can completely inhibit crawling.
出处
《机械设计与制造》
北大核心
2015年第9期178-181,共4页
Machinery Design & Manufacture
基金
精密机床传动系统变形误差动态修正方法研究(2011MS0719)
