本文選題：GH4169 + 高速珩磨��； 參考：《南京航空航天大學(xué)》2017年碩士論文

【摘要】：珩磨是工具與工件在面接觸狀態(tài)下,以較低的切削速度和壓力,對(duì)工件切削的加工方法,綜合了磨削和研磨的主要特點(diǎn),在一定程度上可以獲得精密磨削的加工效率,同時(shí)也可以達(dá)到研磨加工的表面質(zhì)量。但目前普通珩磨技術(shù)在航空難加工材料(如鎳基高溫合金、不銹鋼等)孔加工時(shí)仍然存在加工效率低,精度和表面質(zhì)量不易保證等問(wèn)題。有鑒于此,本文提出采用超硬磨料工具對(duì)鎳基高溫合金GH4169材料孔進(jìn)行高速珩磨加工,解決航空難加工材料孔精密加工過(guò)程的上述難題,以期實(shí)現(xiàn)其高效精密加工。本文通過(guò)開(kāi)展立方氮化硼(CBN)珩磨工具高速珩磨GH4169孔數(shù)值仿真和試驗(yàn),分析對(duì)材料去除率和表面質(zhì)量產(chǎn)生影響的主要因素及其影響規(guī)律。主要研究工作如下:(1)建立了表面粗糙度數(shù)值分析預(yù)測(cè)模型,獲得了珩磨工藝參數(shù)對(duì)表面粗糙度及表面形貌的影響規(guī)律,采用響應(yīng)曲面法建立了工藝參數(shù)優(yōu)選模型,并進(jìn)行了試驗(yàn)驗(yàn)證。(2)通過(guò)系統(tǒng)的GH4169孔高速珩磨試驗(yàn),分析主軸轉(zhuǎn)速、往復(fù)速度、漲刀行程、漲刀時(shí)間對(duì)材料去除率的影響規(guī)律,獲得了影響材料去除率的主要影響因素及其影響規(guī)律。(3)通過(guò)系統(tǒng)試驗(yàn)分析了工藝參數(shù)對(duì)表面粗糙度影響的顯著程度及其影響規(guī)律,通過(guò)珩磨孔表面微觀形貌、表層微觀組織、表層顯微硬度及表面殘余應(yīng)力綜合評(píng)價(jià)高速珩磨孔的表面質(zhì)量。
[Abstract]:Honing is that the cutting method of workpiece is integrated with the main characteristics of grinding and grinding, and the machining efficiency of precision grinding can be obtained to a certain extent under the condition that the tool and workpiece are in contact with each other, with lower cutting speed and pressure, the machining method of workpiece cutting is integrated with the main characteristics of grinding and grinding. At the same time, the surface quality of grinding can be achieved. However, at present, the common honing technology still has some problems such as low processing efficiency, difficult to guarantee precision and surface quality in the hole processing of aviation refractory materials (such as nickel-based superalloy, stainless steel, etc.). In view of this, this paper puts forward to use super hard abrasive tool to honing the high speed honing hole of nickel-based superalloy GH4169 material, so as to solve the problem mentioned above in the precision machining process of aviation difficult material hole, in order to realize its high efficiency precision machining. In this paper, the numerical simulation and experiment of high speed honing GH4169 holes with cubic boron nitride honing tool are carried out, and the main factors affecting the material removal rate and surface quality and their influencing rules are analyzed. The main research work is as follows: (1) the numerical analysis and prediction model of surface roughness is established, the influence of honing parameters on surface roughness and surface morphology is obtained, and the optimization model of process parameters is established by using response surface method. Through the system GH4169 hole high speed honing test, the influence of spindle speed, reciprocating speed, expanding stroke and time on material removal rate is analyzed. The main factors affecting the material removal rate and its influencing rules are obtained. The remarkable degree and the influence law of the process parameters on the surface roughness are analyzed through systematic experiments. The honing hole surface morphology and the surface microstructure are obtained, and the results are as follows: (1) the effect of the process parameters on the surface roughness is analyzed. The surface quality of high speed honing hole is evaluated by surface microhardness and surface residual stress.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TG580.67

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本文編號(hào)：1818879