The automatic image inspection system for measuring dimensional parameters of a saw blade

For ensuring the product quality under the condition of high-speed automatic production, the tendency with the aid of automatic inspection has grown rapidly, because of its benefits of promoted efficiency, higher precision and cost down. Image measurement and analysis have been integrated in automatic optical inspection (AOI) technology which can be substituted for many current manual measurements procedures. With the image measurement system, measurement performance and efficiency can be obviously enhanced. In this investigation, correlative image measurement theories, hardware equipments and self-developed program have been utilized to build a measurement system for the determination of dimensional parameters of a saw blade. Measured parameters include tooth pitch, tooth root depth, tooth shape radius of curvature, and angle of clearance. Measurement system analysis (MSA) is used to calculate standard deviation. By precision block gauges and angle gauges, comparison between MSA and gauges have been performed to verify the accuracy of the developed system. The dimensional parameters of a saw blade obtained from this measurement system are available to diagnose the saw blade quality and for quantitative analysis. It will be benefic for accuracy promotion and production efficiency in manufacturing processing of saw blades.