本文選題：等基圓錐齒輪 + 刮削加工　； 參考：《河南科技大學》2017年碩士論文

【摘要】：硬齒面弧齒錐齒輪因其良好的齒面承載能力在大型主機設備中的應用越來越廣泛,但其加工機床體積大、價格高、制造技術復雜、加工效率低,且核心加工技術大多被國外制造商所掌握,盡管國內相繼出現(xiàn)了有關研究,但大多集中在軟齒面。等基圓錐齒輪作為一種新型的曲線齒錐齒輪,加工設備簡單,加工費用低廉,在一定范圍內可以取代弧齒錐齒輪。等基圓錐齒輪采用成形銑削方式、兩軸聯(lián)動進行加工,具有成本低、機床結構簡單且小型化等特點。但是,所采用指形硬質合金銑刀制作難度大,指形砂輪磨損快且強度低,難以實現(xiàn)硬齒面等基圓錐齒輪的精加工,且其加工效率和加工后表面質量較低,極大地限制了等基圓錐齒輪的廣泛應用。本文以硬齒面等基圓錐齒輪為研究對象,在已有等基圓錐齒輪理論基礎上,結合齒輪嚙合分析理論、數(shù)控加工技術等領域,系統(tǒng)地研究了齒面刮削理論及其方法,具體內容如下:等基圓錐齒輪刮削加工理論研究�；邶X輪嚙合原理和微分幾何原理,分析了刮削加工實現(xiàn)的可行性。依據(jù)等基圓錐齒輪成形加工理論,建立了刮削加工坐標系,推導了刮削加工包絡而成的齒面方程。利用MATLAB軟件編寫程序,在輪坯坐標系中構造了等基圓錐齒輪的三維曲面。在齒面方程的基礎上,對比了刮削齒面與理論齒面,分析了刮削齒面的法向加工精度。以上研究為后續(xù)嚙合分析和加工仿真奠定了基礎。等基圓錐齒輪刮削齒面接觸分析。從刮削齒面方程提取出齒面點數(shù)據(jù)文件,導入UG軟件中,構建了大小齒輪模型。根據(jù)有限元分析理論,將模型導入ABAQUS中,裝配后劃分網(wǎng)格,進行靜力學分析。根據(jù)不同時刻接觸所產生的應力應變,得出了大小輪凹凸面的接觸軌跡示意圖。根據(jù)等基圓錐齒輪的方程,以齒輪嚙合理論為基礎,利用MATLAB建立非線性方程組,求出了齒面嚙合點、齒面?zhèn)鲃诱`差,并繪制出其圖形以及相嚙合面的接觸跡線,由TCA結果可知,該刮削齒面嚙合傳動性能良好。兩種接觸分析結果,充分驗證了等基圓錐齒輪齒面刮削加工的可行性及正確性。等基圓錐齒輪數(shù)控刮削仿真研究。根據(jù)等基圓錐齒輪數(shù)控加工原理,分析了等基圓錐齒輪成形加工的運動特點,規(guī)劃了刮削加工運動中的瞬時刀具位置姿態(tài)。通過后置處理,求解了數(shù)控刮削中的運動坐標顯函數(shù)表達式。并在VERICUT軟件中,進行等基圓錐齒輪刮削加工的數(shù)控仿真。仿真結果表明:等基圓錐齒輪的刮削加工是正確、可行的。
[Abstract]:Arc bevel gear with hard tooth face is more and more widely used in mainframe equipment because of its good bearing capacity of tooth surface, but its machining machine tool is large in volume, high in price, complex in manufacturing technology and low in efficiency.And the core processing technology is mostly mastered by foreign manufacturers, although there have been related studies in China, but mostly concentrated in the soft tooth surface.As a new type of curved bevel gear, isobaric bevel gear can replace arc bevel gear in a certain range because of its simple processing equipment and low processing cost.The equal base bevel gear is processed by forming milling and two axes linkage, which has the advantages of low cost, simple structure and miniaturization.However, it is difficult to make finger carbide milling cutter, and the wear of finger grinding wheel is fast and the strength is low, so it is difficult to finish machining hard tooth surface equal base bevel gear, and its machining efficiency and surface quality after machining are low.The wide application of isobaric bevel gears is greatly limited.In this paper, based on the theory of equal base bevel gear with hard tooth surface, combined with the theory of gear meshing analysis and NC machining technology, the theory and method of tooth surface scraping are studied systematically.The main contents are as follows: the theoretical study of equal base bevel gear scraping.Based on gear meshing principle and differential geometry principle, the feasibility of scraper machining is analyzed.Based on the theory of equal base bevel gear forming, the scraper coordinate system was established, and the tooth surface equation was derived.The 3D curved surface of equal base bevel gear is constructed in the wheel blank coordinate system by using MATLAB software.Based on the equation of tooth surface, this paper compares the tooth surface of scraper with that of theory, and analyzes the accuracy of normal machining of tooth surface.The above research lays a foundation for the subsequent meshing analysis and machining simulation.Contact analysis of tooth surface of equal base bevel gear.The data file of tooth surface point was extracted from the equation of cutting tooth surface and imported into UG software to construct the size gear model.According to the theory of finite element analysis, the model is introduced into ABAQUS, and then meshed after assembly for statics analysis.According to the stress and strain produced by contact at different times, the contact track diagram of the concave and convex surfaces of large and small wheels is obtained.According to the equation of equal base bevel gear, based on the meshing theory of gear, the nonlinear equations are established by using MATLAB, the tooth surface meshing point and tooth surface transmission error are calculated, and the figure and contact trace line of the phase meshing surface are plotted. The results of TCA show that,The meshing transmission performance of the scraper tooth surface is good.The results of two kinds of contact analysis fully verify the feasibility and correctness of machining the tooth surface of equal base bevel gear.Research on NC scraper simulation of isobaric bevel gear.According to the NC machining principle of equal base bevel gear, the kinematic characteristics of equal base bevel gear forming processing are analyzed, and the instantaneous cutter position attitude in the scraping motion is planned.The explicit function expression of motion coordinate in NC scraping is solved by postprocessing.And in VERICUT software, the NC simulation of equal base bevel gear scraping is carried out.The simulation results show that the machining of equal base bevel gear is correct and feasible.
【學位授予單位】：河南科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TG619

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