本文選題：異形通道 + 電火花加工�。� 參考：《南京航空航天大學(xué)》2017年碩士論文

【摘要】：含異形通道結(jié)構(gòu)的整體構(gòu)件因其具有輕量化、高壽命、高可靠性等優(yōu)點,在先進航空航天及武器裝備發(fā)動機、大型船舶、汽車等設(shè)計中被越來越廣泛地采用。然而由于異形通道幾何結(jié)構(gòu)復(fù)雜且材料難切削,增大了其整體制造難度。數(shù)控電火花加工技術(shù)具有不受材料力學(xué)性能限制、加工精度高、柔性好等優(yōu)點,特別適合于整體構(gòu)件異形通道的加工。為優(yōu)質(zhì)、高效地發(fā)揮電火花加工整體構(gòu)件異形通道的優(yōu)勢,本文以典型整體構(gòu)件異形通道為研究對象,開展精密電火花加工工程應(yīng)用研究,主要研究內(nèi)容如下:1.通過分析典型整體構(gòu)件異形通道結(jié)構(gòu)的主要特點和加工難點,結(jié)合電火花加工工藝特點,制定異形通道結(jié)構(gòu)電火花加工工藝方案。2.針對工藝方案中大剛度電極設(shè)計和運動軌跡優(yōu)化設(shè)計的難點,提出一種電極設(shè)計方法,保證電極成形面的完整和電極剛度的最大化;結(jié)合兩種不同的目標(biāo)函數(shù)對運動軌跡進行優(yōu)化,確定各軌跡在粗、精加工中的適用范圍,提高加工效率和加工精度。3.在加工仿真的基礎(chǔ)上,對加工仿真結(jié)果進行誤差分析,判斷設(shè)計的電極及運動軌跡是否滿足加工精度要求;采用數(shù)據(jù)點比較法,結(jié)合UG二次開發(fā)平臺,開發(fā)出誤差分析模塊,實現(xiàn)成形電極和異形通道的高效、高精度誤差分析。以典型整體構(gòu)件異形通道為例進行電火花試制加工,加工完成的通道達到了較高精度,滿足了設(shè)計要求的精度,從而論證了整個工藝方案的可行性;總結(jié)出影響整體構(gòu)件異形通道加工精度的主要因素,并提出了解決方案,對解決整體構(gòu)件異形通道的制造難題具有重要意義。
[Abstract]:Because of its advantages of light weight, high life and high reliability, the whole structure with special-shaped channel structure is more and more widely used in the design of advanced aeronautics, aerospace and weapon equipments, large ships, automobiles and so on. However, due to the complex geometric structure of the special-shaped channel and the difficult cutting of the material, it is more difficult to manufacture the special-shaped channel. The NC EDM technology has the advantages of not limited mechanical properties of materials, high machining precision and good flexibility, etc. It is especially suitable for the machining of irregular channels of integral components. In order to give full play to the advantages of the special channel of EDM, this paper takes the typical monolithic component special-shaped channel as the research object, and carries out the research on the application of precision EDM, the main research contents are as follows: 1. Based on the analysis of the main characteristics and machining difficulties of the typical monolithic structural special-shaped channel structure, combined with the characteristics of EDM technology, the EDM process scheme of special-shaped channel structure was established. In view of the difficulties in the design of large stiffness electrode and the optimum design of motion trajectory, a method of electrode design is proposed to ensure the integrity of the electrode forming surface and the maximization of the electrode stiffness. Combined with two different objective functions, the motion trajectory is optimized to determine the applicable range of each trajectory in rough and finishing machining, and to improve the machining efficiency and machining precision. 3. On the basis of machining simulation, the error analysis of machining simulation results is carried out to judge whether the designed electrode and motion track meet the requirements of machining accuracy, and the error analysis module is developed by using the method of data point comparison and combining with the secondary development platform of UG. The high-efficiency and high-precision error analysis of shaped electrodes and special-shaped channels is realized. Taking the typical integral component special-shaped channel as an example, the EDM trial machining is carried out, and the completed channel reaches a higher precision, which meets the precision of the design requirements, and thus demonstrates the feasibility of the whole process plan. The main factors affecting the machining accuracy of the monolithic special-shaped channel are summarized, and the solution is put forward, which is of great significance to solve the manufacturing problem of the monolithic component special-shaped channel.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TG661

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