A14 Machining Error Compensation Utilizing On-the-machine Measurement of machined surface(Digital design and digital manufacturing (CAD/CAM))

Recently, the demand for precision machining of dies and molds with complex shapes has been increasing. Yet, even as the use of CNC machining tools increases in the area of precision machining, machining error compensation is still necessary to meet the machining accuracy requirements. Machining error compensation, however, is an operation that not only demands a highly-skilled machinist, but also requires a large amount of time and money. Transporting a workpiece is time consuming and costly, and re-clamping the workpiece causes positioning errors, especially when it is of substantial size and weight. Therefore, demands for an On-the-machine Measurement have been increasing. This paper describes an On-the-machine Measurement device that consists of a 2D laser displacement sensor. This device attaches to a machining tool using magnetic clamps, and is equipped with special features that permit non-contact scanning measurement, multi-point measurements, high-speed measurements, and the measurement of both the vertical surface and the steep slope.