Quality Influencing Factors Root Cause Analysis and Improvement Strategies for CNC Machining of Fluid Valve Components

Checkfluid是一家位于安大略省的油取样阀制造商，该阀允许从可用于有效维护计划的机械中采集一致的油样。最近，该公司在主要通过车削生产的某些产品中观察到质量缺陷。在这个项目中，U。Waterloo和Checkfluid将 ** 合作，使用先进的诊断工具调查生产线，以便在质量和效率瓶颈方面绘制 ** 生产过程的可靠图片。需要收集的数据包括：** 用于刀具寿命周期分析的刀具成像，使用伺服信号测量CNC定位误差以 ** 确定伺服可重复性，根据ISO** 标准对运动轴进行激光干涉测量以计算驱动轴体积误差，调查热产生的误差，主轴 ** 功率监控，以了解功率消耗与刀具状态和质量结果的相关性;模态 ** 测试，以表征机床振动特征并估计静态刚度。**将对收集到的数据进行比较分析，提出工艺改进方案，并在Checkfluid员工的帮助下在生产车间进行测试。测量结果 ** 还将与同时进行进程监测研究的其他研究小组分享。除了与其生产线相关的即时解决方案外，Checkfluid还将利用从该项目中获得的知识来评估有关未来在工业4.0框架中对过程监控和自动化技术进行投资的各种选择。

Checkfluid is an Ontario-based manufacturer of oil-sampling valves, which allow for consistent oil samples to be**taken from machinery that can be used for efficient maintenance scheduling. Recently, the company has observed**quality defects in certain products produced mainly by turning. In this project, U. Waterloo and Checkfluid will**collaborate to investigate the production line using advanced diagnostic tools, such that a solid picture of the**production process in terms of quality and efficiency bottlenecks can be drawn. The data to be collected includes,**tool imaging for tool life cycle analysis, measurement of CNC positioning errors using servo signals for the**determination of servo repeatability, laser interferometric measurements of the motion axes according to ISO**standards for the calculation of drive-axis volumetric errors, investigation of thermally generated errors, spindle**power monitoring for the correlation of power consumption with tool condition and quality outcomes, modal**testing for the characterization of the machine-tool vibration signature and the estimation of the static stiffness.**The data thus collected will be analyzed comparatively to come up with process improvement solutions, which will**be tested on the production floor with the help of Checkfluid staff. The findings from the measurements will be**also shared with other research teams working in parallel on process monitoring research. Apart from immediate**solutions related to their production line, Checkfluid will also utilize the knowledge gained from this project to**evaluate various options regarding future investment in process monitoring and automation technologies in the**Industry 4.0 framework.