Researches On Key Technologies Of Open NC Shoe Last Machine Tool And Shoe Last CAD/CAM

With the rapid development of CAD/CAM technologies, many changes have been taken place in shoe-last making industry greatly. It has greatly improved the status of shoe last making, shorten the production cycle of shoe last and made the process more efficient. As an efficient machining method, NC copying machining has been a good choice to improve level of the shoe last making.This new machining method has satisfied with the need of modern shoe last manufacturing.Based on the project funded by Zhejiang Province Technology Foundation in 2002—"Development of Shoe Last CAD/CAM System and the Study on NC Machine Tool", the application design of shoe last manufacturing was carried on. The integrated solution project of shoe last numerical manufacture was first proposed interiorly, an application system integrated with measurement, construction and manufacture was built. Main contents of the thesis were presented as follows:1. A integrated solution project of shoe last numerical manufacture was proposed according to the manufacture characteristics of shoe last. In the project, last sample was measured with the general laser 3D scanner, cutting movement was on the control of the open NC shoe last machine tool system, a new shoe last machine tool was used as manufacture foundation, and a shoe last CAD/CAM System was developed as kernel.2. Shoe last sample was measured with laser 3D scanner, and wavelet transformation was used to smooth and denoise measurement data, then the processed data with the good third dimension were got, and the shoe last NC manufacturing model was obtained. Based shoe last NC manufacturing theory, the projection method were used to calculate cutter location, precision were evaluated, and error control strategy were presented. In order to examine the property of shoe last NC program, virtual reality cutting method was applied to verify and to simulate shoe last NC manufacturing.3. On the basis of system error analysis, the whole design of a new NC shoe last machine were completed; some modern design technologies, such as the optimization technology and the finite element method technology were applied to analyze the main parts of the system, It would make sure the successful development of the prototype machine.4. Based on idea of modern design open NC system, used general industry control person computer as hardware , domestic GT400-SV multi-axis movement control card as control kernel, ￡— II series digital AC servo motor as driving components, the hardware platform of shoe last manufacturing were composed. The shoe last NC system was developed.For production of shoe last, from measurement early to manufacture finally, the integrated solution project of shoe last was proposed. First, shoe last sample was measured with general laser 3D scanner. Then, NC cutter location data were calculated by software. Last, the production were manufactured with the special equipment. This method would be a revolution for the old special shoe last measurement device. It will decrease the cost of hardware for the shoe last manufacturing. The successful development of the system will make great sense in prompting the development of domestic NC shoe last making machine.