Research And Implementation On Melting Characteristics Analyzer Of Cast Iron

Higher casting quality is required by the explosive growth of technology and industrial production. Using thermal analysis to detect and control molten iron quality is more important to enhance cast quality. This method is high efficiency and low-cost. Cast iron quality analyzer in cast machine market is single function, low accuracy and high price. So researching multi-functions, high accuracy and low-cost analyzer take an important part in our study.Research and implementation melting characteristics analyzer of cast iron is mainly using thermal analysis and ultrasonic measuring to analyze composition and measure nodularity. This paper adopts PC104, in-hand ultrasonic thickness-measuring instrument, temperature collection module, wireless transceiver module to form experiment platform. Program the whole system software including online data collection and analysis management based on Visual Basic in windows 98/2000 operating system. Good results have been achieved by using wavelet analysis de-noising and detecting signal's characteristic value.Based on the experiment platform, design temperature collection and ultrasonic measuring module using single chip microcomputer. Temperature module is mainly used to cast iron thermal analysis composition analyzing, using thermal couple to collect the sample's temperature cooling curve and according to the certain mathematical model calculate the elemental composition. Using the relationship between the specimen thickness and nodularity, ultrasonic measuring module was designed, including ultrasonic transmitting circuit, receiving circuit and counting circuit, at last calculating nodularity.Through one year developing, the experiment platform became a perfect machine, in DALIAN SHIPING MACHINE CO., LTD. The cast iron analyzer has run well for more than one year. At present, six machines have been manufactured. The designed temperature collection and ultrasonic measuring module, 4×4 keyboard input, LCD display and the sound results, compose in-hand cast iron melting analyzer.