Friction Sensing for Manufacturing Process Analysis and Control

生产工艺操作和产品质量由 很大一部分是由工具和工件之间的摩擦力引起的 表面。复杂的数值过程分析受到 缺乏对摩擦边界条件的精确描述 其存在于制造操作的极端环境中。 制造过程控制是基于测量的状态， 过程，但重要的摩擦条件不能直接 测定了 研究工作提出了开发一种传感器能够测量 材料变形过程中的摩擦应力分布。的 传感器将具有足够的分辨率来测量非常局部的摩擦 对工艺工具分布区域的影响。将 设计为对工艺影响最小， 生产过程。传感器的使用将在 过程控制应用 基本的传感器配置是一个微型压电阵列， 力感测元件在一个结构中，该结构安装在 加工工具

Manufacturing process operation and product quality are determined in large part by the friction which acts between the tooling and workpiece surfaces. Sophisticated numerical process analyses are hindered by a lack of accurate descriptions of the frictional boundary conditions which exist in the extreme environments of manufacturing operations. Manufacturing process control is based on measurements of the states of processes, but the important frictional conditions cannot be directly measured. Research work is proposed to develop a sensor capable of measuring friction stress distributions in material deformation processes. The sensor will have sufficient resolution to measure very local friction effects over a distributed area on the process tooling. It will be designed so as to have minimal effect on the process and to be useful in production processes. The use of the sensor will be demonstrated in a process control application. The basic sensor configuration is an array of miniature piezoelectric force sensing elements in a structure which fits below the surface of process tooling.