摘要
在数控机床长期使用过程中,滚珠丝杠、导轨及轴承存在一定程度的磨损,且数控系统动态响应不稳定,伺服优化不完善,也会影响数控机床的圆度误差。为此,提出了一种能够提升立式加工中心铣削圆精度的新方法。首先介绍立式加工中心加工中存在的精度问题;然后提出一种改进的立式加工中心加工方法,通过优化切削参数、建立循圆加工能力指数计算公式,根据实验找到机床加工极限进给,并通过设置合适的加工能力指数实现了铣削圆加工精度的提升;最后通过实验验证该方法的有效性,并进行综合评价和分析。实验通过调整系统参数更改反向间隙值来提高加工中心的精度,同时将参数K定义为设备的循圆加工能力指数,根据切削验证,得出K≤600时,插补铣削精度<0.01 mm;K为1 800时为机床极限加工进给。分析结果为立式加工中心精度提升提供了新的方法和思路。
In the process of long-term use of CNC machine tools,there is a certain degree of wear and tear of ball screws,guide rails and bearings,and the dynamic response of the CNC system is unstable,and the servo optimization is imperfect,which will also affect the roundness error of CNC machine tools.The purpose of this paper is to propose a new method that can improve the accuracy of milling circles in vertical machining centers.Firstly,the accuracy problems and reasons existing in the machining of vertical machining centers are introduced.Then,an improved machining method of vertical machining center is proposed,which optimizes the cutting parameters,establishes the circular machining capacity index model,finds the ultimate feed of machine tool processing according to the experiment,and improves the accuracy of the milling circle by setting the appropriate machining capacity index,so as to realize the improvement of machining accuracy.Finally,the effectiveness of the method was verified by experiments,and a comprehensive evaluation and analysis were carried out.In the experiment,the accuracy of the machining center is improved by adjusting the system parameters to change the backlash value,and at the same time,the parameter K is defined as the circular machining ability index of the equipment,and the interpolation milling accuracy is less than 0.01 mm when the K is less than or equal to 600 according to the cutting verification.When the K is 1800,it is the ultimate machining feed of the machine tool.The analysis results provide new methods and ideas for improving the accuracy of vertical machining centers.
作者
徐永明
XU Yong-ming(Genertec Shenyang Machine Tool Co.,Ltd.,Shenyang 110142,China)
出处
《机械工程与自动化》
2024年第3期110-113,共4页
Mechanical Engineering & Automation
基金
辽宁省“揭榜挂帅”科技重大专项(2022JH1/10400027)。
关键词
立式加工中心
孔加工
精度提升
刀具寿命
vertical machining center
hole making
accuracy improvement
tool life
