本文選題：等基圓錐齒輪 + 刮削加工��； 參考：《河南科技大學(xué)》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(jī)設(shè)備中的應(yīng)用越來(lái)越廣泛,但其加工機(jī)床體積大、價(jià)格高、制造技術(shù)復(fù)雜、加工效率低,且核心加工技術(shù)大多被國(guó)外制造商所掌握,盡管國(guó)內(nèi)相繼出現(xiàn)了有關(guān)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(shè)備簡(jiǎn)單,加工費(fèi)用低廉,在一定范圍內(nèi)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(dòng)進(jìn)行加工,具有成本低、機(jī)床結(jié)構(gòu)簡(jiǎn)單且小型化等特點(diǎn)。但是,所采用指形硬質(zhì)合金銑刀制作難度大,指形砂輪磨損快且強(qiáng)度低,難以實(shí)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(zhì)量較低,極大地限制了等基圓錐齒輪的廣泛應(yīng)用。本文以硬齒面等基圓錐齒輪為研究對(duì)象,在已有等基圓錐齒輪理論基礎(chǔ)上,結(jié)合齒輪嚙合分析理論、數(shù)控加工技術(shù)等領(lǐng)域,系統(tǒng)地研究了齒面刮削理論及其方法,具體內(nèi)容如下:等基圓錐齒輪刮削加工理論研究。基于齒輪嚙合原理和微分幾何原理,分析了刮削加工實(shí)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(biāo)系,推導(dǎo)了刮削加工包絡(luò)而成的齒面方程。利用MATLAB軟件編寫(xiě)程序,在輪坯坐標(biāo)系中構(gòu)造了等基圓錐齒輪的三維曲面。在齒面方程的基礎(chǔ)上,對(duì)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(chǔ)。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(diǎn)數(shù)據(jù)文件,導(dǎo)入U(xiǎn)G軟件中,構(gòu)建了大小齒輪模型。根據(jù)有限元分析理論,將模型導(dǎo)入ABAQUS中,裝配后劃分網(wǎng)格,進(jìn)行靜力學(xué)分析。根據(jù)不同時(shí)刻接觸所產(chǎn)生的應(yīng)力應(yīng)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(chǔ),利用MATLAB建立非線性方程組,求出了齒面嚙合點(diǎn)、齒面?zhèn)鲃?dòng)誤差,并繪制出其圖形以及相嚙合面的接觸跡線,由TCA結(jié)果可知,該刮削齒面嚙合傳動(dòng)性能良好。兩種接觸分析結(jié)果,充分驗(yàn)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(yùn)動(dòng)特點(diǎn),規(guī)劃了刮削加工運(yùn)動(dòng)中的瞬時(shí)刀具位置姿態(tài)。通過(guò)后置處理,求解了數(shù)控刮削中的運(yùn)動(dòng)坐標(biāo)顯函數(shù)表達(dá)式。并在VERICUT軟件中,進(jìn)行等基圓錐齒輪刮削加工的數(shù)控仿真。仿真結(jié)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(xué)位授予單位】：河南科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TG619

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