SBIR Phase I: Ultrasonic Fluid Probe for Vibration Monitoring of Advanced Machine Tools

这个小企业创新研究（SBIR）第一阶段项目将开发一种创新的方法，用于在先进机床的表征过程中以及在加工过程中测量振动。该方法使用流体射流作为探头，可以制作出精确、坚固、低成本的传感器。高速铣削需求的增长，以及越来越多地使用小尺寸刀具和难以加工的先进材料，要求改进机床的特性，并控制加工过程中的振动和颤振。要做到这一点，先进的机器系统必须依靠精确的传感器来测量和控制振动。对传感器的要求有：(1)精确的振动测量；(2)不受加工环境的影响；(3)双重用途，用于操作前的表征和铣削过程中的监测；(4)体积小，成本低。到目前为止，市面上可用的传感器还不能满足这些要求，而第一阶段的传感器有望满足大部分需求。流体探头作为机床控制系统的一部分，具有减少机床振动的潜力，从而改善表面光洁度并提高产量。同样的传感器将用于机床的表征和加工过程中的监控。流体探针的主要商业市场是机床工业。加工性能在许多工业领域至关重要，包括汽车、航空航天和快速成型。

This Small Business Innovation Research (SBIR) Phase I project will develop an innovative approach for measuring vibration during characterization of advanced machine tools as well as during the machining process. The approach uses a fluid jet as a probe that will make an accurate, robust, and low cost sensor. The growing demand for high-speed milling, as well as increasing use of small size tools and difficult-to-machine advanced materials, call for improved characterization of machine tools and for controlling vibration and chatter during the machining process. To do this, advanced machine systems must rely on accurate sensors to measure and to control vibrations. Sensor requirements are: (1) accurate vibration measurements; (2) impervious to the machining environment; (3) dual use for characterization prior to operation and for monitoring during the milling process; and (4) small size and low cost. To date, commercially available sensors do not meet these requirements, whereas the Phase I sensor is expected to satisfy much of the need.The fluid probe, as part of a machine control system, has the potential to reduce machine tool vibrations, thereby improving surface finish and increasing throughput. The same sensor will be used both for characterization of the machine tools and for monitoring during machining. The principal commercial market for the fluid probe is the machine tool industry. Machining performance is critical in many industrial sectors, including automotive, aerospace, and rapid prototyping.