Lightweight Composite Components Bodywork Portable Processing Equipment Developed

With the rapid development of science and technology, new special vehicles should not only have excellent protective performance, but also light body weight, in order to meet the requirements of high mobility of modern warfare. Therefore, it is necessary to do some research on reducing the weight of protective unit. Research shows that engineering ceramics/GFRP light composite structure has a very broad application prospect. Because of the constraints of traditional technology, some assembly features can not be accurately set aside in the process of body shaping, especially a large number of connective holes, which should be drilled according to the requirements of assembly. So a dedicated portable processing equipment should be developed to meet the processing needs.The overall structure design of the portable processing equipment should meet the requirements of assembly site. The structure dimensions and materials of some parts, such as suction cup base, support, slide and connective block, should be determined by considering the impact of total weight and structural stiffness. A prototype will be developed after selecting a motor.In order to ensure that the suction cup base can be adsorbed on the workpiece, contact analysis is needed to sealing structure.3D geometric model of sealing structure, which is created in Pro/E, is imported into ANSYS to analyze the contact performance between rubber seal and workpiece, especially discussing the impact of rubber hardness on the contact.Because of the advantage of machine analysis, ANSYS Workbench is used to analyze the machine modal of the portable processing equipment. And then, modal testing equipment is used to test the machine modal. Comparison is carried out between finite element analysis and testing results. The results show that the frequencies of the motor are very different from the machine natural frequencies, so it is not easy to set up resonance. Therefore, the structure design and motor selection of the portable processing equipment are reasonable. Dynamic characteristics of the equipment are good.In order to verify that the portable processing equipment can meet the processing needs of light composite structure, processing experiment is needed. Selecting speed, feed pressure and wall thickness of diamond trepanning drill as experimental factors, three factors and three level orthogonal experiment is carried out in order to analyze the relationship between factors and processing time and obtain optimal processing parameters. And then, analysis of variance (ANOVA) is used to show the significance of the factors. A pre-stressing equipment is developed to further improve the quality of drilling. The results of processing experiment and finite element analysis show that the pre-stressing equipment plays an important role on improving the quality of holes.