發(fā)布時(shí)間：2018-05-28 17:57

  本文選題：直齒輪 + 逆向工程�。� 參考：《東北石油大學(xué)》2017年碩士論文

【摘要】：齒輪傳動(dòng)是目前運(yùn)用最普遍的機(jī)械傳動(dòng)方式之一,具備高效、精密、穩(wěn)定、傳動(dòng)方式多樣等特性,能滿足復(fù)雜的生產(chǎn)工藝需求。隨著科技進(jìn)步與生產(chǎn)需求的提高,齒輪傳動(dòng)也逐漸向更精密、更復(fù)雜、壽命更長(zhǎng)的方向發(fā)展,齒輪結(jié)構(gòu)更復(fù)雜、尺寸更大型、精度要求更嚴(yán)格,備受國(guó)內(nèi)外工業(yè)領(lǐng)域的重視。但在實(shí)際生產(chǎn)工況下,個(gè)別齒輪的局部失效將導(dǎo)致整套設(shè)備乃至整條生產(chǎn)線癱瘓,給生產(chǎn)帶來不可逆轉(zhuǎn)的損失,因此齒輪失效的預(yù)防與修復(fù)一直是國(guó)內(nèi)外學(xué)者研究的重中之重。但是傳統(tǒng)的修復(fù)方法應(yīng)用局限性大、修復(fù)時(shí)間長(zhǎng)且修復(fù)精度不高,一些方法只能暫時(shí)維持生產(chǎn)并未從實(shí)質(zhì)上對(duì)失效齒輪進(jìn)行修復(fù)。而隨著再制造概念的提出,如何快速、精確地對(duì)失效零件進(jìn)行修復(fù)使其質(zhì)量達(dá)到甚至超過新品的質(zhì)量成為研究的熱點(diǎn)問題。本文根據(jù)逆向工程與NURBS曲面的基本理論,以漸開線圓柱直齒輪為例進(jìn)行了以下幾方面的研究,旨在更快速、更精確地修復(fù)失效齒輪。在研究直齒輪的數(shù)學(xué)表達(dá)、加工成型等理論的基礎(chǔ)上,結(jié)合逆向工程表面數(shù)據(jù)采集方法的特點(diǎn),提出基于特征點(diǎn)反求直齒輪參數(shù)的方法,給出特征點(diǎn)選擇和加工參數(shù)反求的計(jì)算理論。利用三坐標(biāo)測(cè)量設(shè)備對(duì)已知參數(shù)的失效直齒輪進(jìn)行實(shí)驗(yàn),驗(yàn)證了這種方法的正確性。對(duì)缺損區(qū)域重構(gòu)方法進(jìn)行研究,提出了針對(duì)輪齒斷裂截面的最優(yōu)測(cè)量方法與缺損部位重構(gòu)的方法。研究的關(guān)鍵在于NURBS理論在輪齒斷裂截面擬合重構(gòu)上的應(yīng)用,并在失效直齒輪上成功地進(jìn)行了實(shí)驗(yàn)驗(yàn)證。
[Abstract]:Gear transmission is one of the most widely used mechanical transmission methods at present. It has the characteristics of high efficiency, precision, stability and variety of transmission modes, and can meet the needs of complex production technology. With the progress of science and technology and the improvement of production demand, gear transmission is gradually developing towards more precise, more complex and longer life. The structure of gear is more complex, the size is larger, and the precision requirement is more stringent. However, under the actual production conditions, the partial failure of individual gears will lead to the paralysis of the whole equipment and even the whole production line, which will bring irreversible losses to the production. Therefore, the prevention and repair of gear failure has always been the most important research focus of domestic and foreign scholars. However, the traditional repair methods are limited in application, long repair time and low precision. Some methods can only maintain the production temporarily and do not repair the failure gear in essence. With the development of the concept of remanufacturing, how to repair failure parts quickly and accurately so that their quality can reach or exceed the quality of new products has become a hot issue. Based on the basic theory of reverse engineering and NURBS surface, this paper takes involute cylindrical spur gear as an example to study the following aspects, in order to repair the failure gear more quickly and accurately. On the basis of studying the mathematical expression, machining and forming theory of spur gear and combining the characteristics of surface data acquisition method of reverse engineering, a method of inversely calculating the parameters of spur gear based on feature point is put forward. The calculation theory of feature point selection and machining parameter inversion is given. The validity of this method is verified by the experiment of three-coordinate measuring equipment on the failed spur gear with known parameters. The method of reconstruction of defect region is studied, and the optimal measuring method for fracture section of gear tooth and the method of reconstruction of defect site are proposed. The key point of the study is the application of NURBS theory to the fitting and reconstruction of the broken section of the gear teeth, and the experimental results have been successfully verified on the failed spur gears.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TH132.41

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本文編號(hào)：1947651