各向异性机械加工粗糙纹理表面的分形建模方法及评定-机械电子工程专业论文.docxVIP

Abat Abatract 西安理工大 西安理工大学硕士学位论文 万方数据 万方数据 万方数据 万方数据 Title: THE FRACTAL MODELING AND EVALUATION ON THE ANISOTROPIC AND ROUGH TEXTURE BY MACHINING OPERATION1 Major: Mechrtronic Engineering Name: Yanan Cao Signature: Supervisor: Prof. Wen Wang Signature: Abstract Nearly 30 years, simulation of the machining texture surface is gradually become a multidisciplinary and hot research topic in the field of engineering application. The characteristics of morphology and the contact performance of machining surface of mechanical parts are closely related. Generating and obtaining data of the the machining texture surface is the basis and premise of the micro contact theory of mechanical joint surface and calculation of basic characteristic parameters of the junction surface. In order to simulate the micro-morphology of the machining texture surface, A method of generating and evaluating of the machining texture surface on the fractal theory is proposed. Firstly, a experimental measurement of the texture of machine parts was carried out for obtaining the micro-morphology and 3D data of the machining texture surface. To validate the anisotropic characteristic, spectral analysis of the measurement data was implemented , which is indicated that it is feasible and indispensable that simulation of the machining texture using the fractal model established by fractal theory. Since that getting the machining morphology, mage processing was lauched, fractal dimension of the texture was also calculated by full coverage method, which offered dimension patameter to simulation of the rough surface. Secondly, the main fractal modeling methods on the surface of the mechanical processing were compared and analyzed, choosing the suitable method for the paper, the spectrum synthesis method for the simulation of the rough surface. This method can be obtained the anisotropic fractal surface by controlling the number of fractal parameter D and G . Then, analyzed the characteristics of the