Automatic inspection system for dimensional measurements of the saw blade milling cutter, The demand for measuring equipments of automatic optical inspection has grown rapidly, because of its benefits of promoted efficiency and higher precision. Instead of manual projection measurements, measurement performance and efficiency can be obviously enhanced by the image measurement system. In this investigation, digital image processing and geometrical measurement principles have been integrated to develop a dynamic measurement system for the dimensional measurements of a saw blade milling cutter. The repeatability of the measurement system has been analyzed and its accuracy has been verified by using commercial 3D image measurement system. The analysis results show that the dimensional precision of 25μm and the angular precision of 0.21° can be realized by the self-developed measurement system. Between the results of the developed system and reference standard system, there are 25μm deviation in dimensional measurement and 0.26° in angular measurement. That measuring performances can meet the industrial requirement and the higher measurement efficiency can be achieved.
For advanced manufactureand quality control in the mechanical industry, it is necessary todominate concerning methods for theproduct inspection.Although currently many inspection machines or instruments have been offered for 2D or 3D dimensional measurements, but there isno properautomation inspection system for the dimensional measurement of the saw blade milling cutterwhose quality will remarkably influence the precision of saw bladesproducedby it. Hence no accurate data can be provided for correction or compensationwhen the saw blade milling cutter is processed.Generally the dimensions of saw blade milling cutters could beverified by thatofsaw bladesprocessed by the milling cutter, after saw blades have been inspected by the optical projector. According to the dimensionalresults acquired by the indirect measurement method, the concerning dimensions could be compensated andthe saw blade milling cutter would be groundcorrectly.With this above-mentioned method, dimensional and angular measurement errors have been ofteninduced. Because considerable teeth of a saw bladeneed to be inspected, it will be inefficiency and there will also be manual errors resulting from analysis of the inspector during the manual procedure. Therefore, the inspection results could notconcretely reveal the quality of a saw blade milling cutter.In this investigation on the dimensional measurement of the saw blade milling cutter, an image inspection system has been developed by integrating the image measurement technology, CCD, backlight panel of LED, rotary shaft of servo motor and x-y biaxial stage. By the system, the image position of some points in a saw blade milling cuttercan be automatically acquired and then dimensional parameters can beestimated with aid of the self-developed measuring program. The error of the manual operationwould be significantlyminimized. The measuringparameters of a saw blade milling cutterconsist oftooth pitch, processing height, height of a fulltooth, radius of a tooth top and pressure angle.The quantitative measurement results can be provided for the positioning compensation of the processing machineto realize the more accurate dimensions of a processed saw blade. With this new measurementfunction,the efficiency and accuracy can be obviously enhanced.