發(fā)布時間：2018-06-06 01:25

  本文選題：直齒面齒輪 + 復雜空間型面　； 參考：《西安工業(yè)大學》2017年碩士論文

【摘要】：直齒面齒輪是一種與直齒圓柱齒輪相嚙合的平面齒圈齒輪,憑借其重合度高、傳動平穩(wěn)、噪聲低、扭矩分流效果好等傳動特點,使得直齒面齒輪被廣泛應用在了低速和高速、輕載和重載的眾多傳動領域中。然而直齒面齒輪的齒面較為復雜,其幾何形狀已不是傳統(tǒng)漸開線齒面或其他常見的齒面,而是一種復雜空間型面,為了解決傳統(tǒng)展成法加工直齒面齒輪中存在的周期長、成本高、不適合進行批量生產(chǎn)的問題以及傳統(tǒng)成型法加工直齒面齒輪中存在的批量化制造質(zhì)量精度低的現(xiàn)象。本文提出了一種基于電解加工技術的直齒面齒輪批量化快速制造工藝以實現(xiàn)在質(zhì)量保證前提下的直齒面齒輪批量化快速制造。首先,利用直齒面齒輪的齒面方程通過對直齒面齒輪的齒面建模點進行合理規(guī)劃并采用截面放樣法構建出用于電解加工的直齒面齒輪齒面三維模型及相應的直齒面齒輪三維模型;其次為了解決傳統(tǒng)“減材制造”進行批量生產(chǎn)時存在的技術缺陷,根據(jù)直齒面齒輪的三維模型結(jié)構依照帶有活動成型零部件的注射模具設計方法設計出相應的直齒面齒輪母模三維模型,并利用FDM快速成型技術依次通過三維模型的前處理、設置快速成型工藝參數(shù)及制件后處理這3個環(huán)節(jié)快速制造出用于批量化生產(chǎn)電解加工直齒面齒輪半精制件的直齒面齒輪母模實體,再將此實體作為熔模鑄造用的注蠟模具熔模精鑄出待電解精加工的批量直齒面齒輪半精制件;最后,基于電解加工技術采用側(cè)面間隙法設計電解精加工直齒面齒輪的陰極頭型面并采用電解液反流式方式設計出相應的陰極流道,再結(jié)合正交試驗法并利用逐步回歸分析的思想確定出電解精加工直齒面齒輪的最優(yōu)工藝參數(shù)組合,并按此最優(yōu)工藝參數(shù)設計電解精加工直齒面齒輪的初始陰極,最后通過構建拉格朗日插值函數(shù)進行迭代來獲取最優(yōu)修形系數(shù)以實現(xiàn)對電解精加工的陰極頭進行修形,從而加工出了具有綜合精度為IT9級的批量直齒面齒輪制件。研究結(jié)果表明,本文提出的基于電解加工技術的直齒面齒輪批量化快速制造工藝不僅實現(xiàn)了較高精度直齒面齒輪的批量化制造,同時通過將“增材制造”技術中的快速成型技術與熔模精鑄工藝相結(jié)合,還實現(xiàn)了較短時間內(nèi)、以較低成本的直齒面齒輪半精制件的批量化快速制造,解決了傳統(tǒng)批量化“減材制造”技術中存在的成本高、工序復雜、效率低的問題,驗證了該工藝方案的正確性與可行性。
[Abstract]:Spur gear is a kind of planar ring gear meshing with straight cylindrical gear. With its characteristics of high coincidence, stable transmission, low noise and good torque diversion effect, spur gear is widely used in low speed and high speed. Light and heavy loads in many fields of transmission. However, the tooth surface of spur gear is more complex, its geometric shape is not traditional involute tooth surface or other common tooth surface, but a complicated spatial surface. The problem of high cost and unsuitable for mass production and the phenomenon of low quality precision of mass manufacturing in traditional forming process of spur gear. In this paper, a batch rapid manufacturing process of spur gear based on ECM is proposed to realize the rapid manufacturing of spur gear with quality assurance. First By using the tooth surface equation of the spur gear, the tooth surface modeling point of the spur gear is reasonably planned, and the three-dimensional model of the tooth surface of the straight tooth gear and the corresponding three-dimensional model of the straight tooth face gear are constructed by using the section lofting method. Secondly, in order to solve the technical defects in batch production of traditional "material reduction manufacturing", According to the 3D model structure of spur gear, according to the design method of injection mould with movable forming parts, the corresponding 3D model of spur gear master die is designed, and the FDM rapid prototyping technology is used to preprocess the 3D model in turn. By setting the process parameters of rapid prototyping and the post-processing of the parts, the master mould entity of the spur gear for batch production of the semi-refined parts of the straight face gear was produced quickly. The solid is then used as a wax injection mould for investment casting to produce a batch of straight gear semi-refined parts to be finished by electrolysis. Based on the electrolytic machining technology, the cathode head profile of the straight gear was designed by side gap method, and the corresponding cathode runner was designed by electrolyte reverse flow. Combining with the orthogonal test method and using the idea of stepwise regression analysis, the optimal process parameters combination of electrolytic finishing straight gear is determined, and the initial cathode of electrolytic finishing straight gear is designed according to the optimum process parameters. At last, the Lagrange interpolation function is constructed to obtain the optimal modification coefficient to realize the modification of the cathode head of electrolysis finishing machining, and then the batch straight gear parts with the comprehensive precision of IT9 class are manufactured. The research results show that the batch rapid manufacturing process of spur gear based on ECM not only realizes the batch manufacturing of gear with higher accuracy. At the same time, by combining the rapid prototyping technology in the "material increasing manufacturing" technology with the investment casting process, the batch rapid manufacturing of spur gear semi-refined parts with lower cost has been realized in a relatively short period of time. It solves the problems of high cost, complex working procedure and low efficiency in traditional batch "material reduction manufacturing" technology, and verifies the correctness and feasibility of the process plan.
【學位授予單位】：西安工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TH132.41;TG662

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本文編號：1984361