本文選題：電火花線切割 + 直紋曲面��； 參考：《燕山大學》2015年碩士論文

【摘要】：隨著科學技術的不斷發(fā)展,各行業(yè)中需要一些批量不大、精度要求高的空間曲面零件,僅僅依靠傳統(tǒng)的切削方法很難滿足這些零件的加工需求。在我國傳統(tǒng)高速走絲電花線切割機床上,附加數(shù)控回轉裝置使工件實現(xiàn)轉、擺聯(lián)動是加工空間直紋曲面的有效方法之一。(1)根據(jù)空間直紋曲面電火花線切割加工的運動規(guī)律及加工特點,利用CAM軟件五軸加工模塊實現(xiàn)了符合線切割特點的復雜直紋曲面的識別以及刀路計算,解決了以往手工編程的難題,并對其后置處理算法進行了推導。(2)建立了極坐標加工坐標系,在該坐標系下對線切割直紋曲面的相對速度進行了分析,通過建立該坐標系通用數(shù)學模型推導了幾種基本運動形式下所形成的典型直紋曲面各點的相對速度規(guī)律。(3)根據(jù)線切割加工直紋曲面的要求,設計了一種小型數(shù)控回轉工作臺以滿足工業(yè)生產(chǎn)的需要,對其機械結構與控制部分進行了詳細討論。(4)利用高速走絲線切割機床進行了錐度切割實驗以及平面切割實驗,探究切割速度對表面粗糙度的影響;利用有限元軟件,在強對流換熱條件下模擬了移動熱源的溫度場得到了放電凹痕的大致形狀,并根據(jù)模擬結果建立了其表面形貌數(shù)學模型。
[Abstract]:With the development of science and technology, many kinds of space curved surface parts with small batch and high precision are needed in various industries. It is difficult to meet the machining requirements of these parts only by traditional cutting methods. In the traditional high speed wire wire-cutting machine tool in our country, the workpiece can be rotated by adding numerical control rotary device. Pendulum linkage is one of the effective methods for machining spatial straight line surface. (1) according to the motion law and machining characteristics of EDM, Using the CAM software five-axis machining module to realize the recognition of complex straight surface and the calculation of cutter path which accord with the characteristics of linear cutting, and solve the difficult problem of manual programming in the past. The post processing algorithm is deduced. (2) the polar coordinate system is established, and the relative velocity of linear cutting straight surface is analyzed in this coordinate system. By establishing the general mathematical model of the coordinate system, the relative velocity law of the typical straight surface formed under several basic motion forms is derived. (3) according to the requirements of linear cutting machining straight line surface, A small NC rotary table is designed to meet the needs of industrial production. The mechanical structure and control part are discussed in detail. (4) Taper cutting experiments and plane cutting experiments are carried out by using high-speed wire-line cutting machine tools. The influence of cutting speed on surface roughness was investigated, and the approximate shape of discharge indentation was obtained by using finite element software under the condition of strong convection heat transfer, and the mathematical model of surface morphology was established according to the simulation results.
【學位授予單位】：燕山大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TG484

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