The Mechanical Design And Software Development Of Automatic Aluminum-coil Notcher For Channel-letter Processing

Chinese Light-box is a three-dimensional advertisement light-box, which is a kind of beautiful and energy saving Channel-letter Lamp-box. It is very popular in America and Europe because of its unique design, beautiful shape, energy saving LED floodlights and it can give the shops more advertising effect compared to ordinary advertising light box, so it would be more and more popular in China in the near future. Aluminum coil which need to be notched is the main production material to make Channel-letter, and the main function of The Automatic Aluminum-coil Notcher for Channel-letter Processing is getting the messages of vector font, fitting the outline of font, and cutting some sawtooth gap according to the curvature, length, turning of the font outline, then the aluminum coil could be used to make Channel Letter Light-box.In the paper, emphasis is given to the body and soft-system design of the notcher. On the base of the overall design conception of CNC notcher, firstly, we introduce the principles, design method, choice and calculation of parameters of the straighter roll mechanism, and then we not only present the method, design and things to attention of the blanking mechanism, feed roller mechanism and shutdown mechanism. Finally, the storage body and extraction method of the vector font are given, so are the extraction and creation of the processing information.The mechanism of the notcher consists of five parts, bracket design of the aluminum-coil, the straighter roll mechanism, the blanking mechanism, feed roller mechanism and shutdown mechanism. Thereinto, the function of the straightening device is to straighten the expanding aluminum coil; to apply to different aluminum coil, the up straightener roll should be made which can move up and down as well as the feed roller mechanism; the blanking mechanism has two dies which are used to cut gaps with different angles.The soft-system is mainly used to extract messages of the vector font which is stored by the key points in the computer, so the outline of font should be fitted by the Bezier curve. it is necessary to compute the length and curvature of every close outline after fitting to get the processing information.