展開輪反求設(shè)計(jì)與虛擬加工關(guān)鍵技術(shù)研究
[Abstract]:As the key part in the automatic testing equipment of steel ball surface, the unfolded wheel moves the whole surface of the ball through friction. Due to the long time friction and wear, partial gravity load affects the precision of the developing wheel surface. The shape of the structure has a great influence on the detection accuracy of the steel ball surface. Therefore, every 50000 steel ball must be replaced in the work, at present can only be purchased from abroad, the price is extremely expensive, has been restricting the domestic use of high-precision steel balls, high-speed rail, aerospace, aviation and other bearings can only be purchased from abroad. In view of the above problems, this paper studies the development wheel by reverse technology and virtual simulation processing technology. First of all, based on the reverse technology, relying on the superior performance and high surface precision of the development wheel, the multi-attribute reverse measurement, point cloud data processing, data reconstruction, mathematical model compensation, reconstruction of the complete solid model; The structural parameters of the development wheel are analyzed from the reverse results, and the structural parameters related to the expansion motion of the steel ball are obtained, and the surface equation and its linear equation are obtained by the analysis of the surface of the working position of the unfolding wheel by the data model of the combined point cloud. Secondly, the virtual prototype experiment platform is built, and the motion simulation of the virtual manufactured unfolded wheel is carried out by using Adams software, and the motion form of the steel ball under the action of the unfolded wheel is observed, and the track of the point on the surface of the ball is tracked. This is used to detect whether the development wheel meets the motion requirements. Then, combining with the previous theoretical analysis to optimize the structure of the development wheel to obtain the development wheel to meet the movement conditions; using Mastercam software to virtual simulation processing of the development wheel, customized reasonable processing technology, analysis of the feed of the tool, A series of machining parameters, such as rotational speed, are generated and optimized. Finally, the error analysis of the obtained samples is carried out by field machining, and compared with the theoretical design value, the source of machining error is analyzed, and the error mathematical model is established. In summary, based on reverse technology, virtual machining technology to research the development wheel: part of the development wheel structure parameters; determine the theoretical equation of the surface of the working position; generate the corresponding NC code processing program; analyze the source of processing errors, A mathematical model of error is established.
【學(xué)位授予單位】:哈爾濱理工大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2016
【分類號(hào)】:TH871
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