英語作業(yè)電火花加工

1、 講解員：講解員： 范壯壯范壯壯Electrical discharge machiningContentThe concept of the EDMThe concept of the EDM1The principle of the EDM2 The characteristics of the EDM 3 Development direction of EDM41 The concept of the EDMElectrical discharge machining is a special processing method, which is used to resist the

2、 electrical erosion caused by the pulse discharge between two electrodes in the working fluid. It is also known as the discharge machining or electrical etching process, which is called EDM電火花加工是利用浸在工作液中的兩極間脈沖放電時產(chǎn)電火花加工是利用浸在工作液中的兩極間脈沖放電時產(chǎn)生的電蝕作用蝕除導(dǎo)電材料的特種加工方法，又稱放電生的電蝕作用蝕除導(dǎo)電材料的特種加工方法，又稱放電加工或電蝕加工，英文簡稱加工或

3、電蝕加工，英文簡稱EDM2 The principle of the EDMw In insulating working fluid, generating a pulse of the spark discharge between the tool and the workpiece,producing instantaneous high temperature and the melting off the surface of the workpiece, to achieve the purpose of the metal surface is processed.w 在絕緣工

4、作液中，工具與工件間產(chǎn)生脈沖性在絕緣工作液中，工具與工件間產(chǎn)生脈沖性火花放電，產(chǎn)生局部瞬時高溫，使工件熔化火花放電，產(chǎn)生局部瞬時高溫，使工件熔化而拋離工件表面，達(dá)到金屬表面被加工的目而拋離工件表面，達(dá)到金屬表面被加工的目的。的。11電火花加工原理圖電火花加工原理圖w The workpiece and tool are respectively connected with the two input end of pulse power supply,automatic feed adjustment device to make the tool and the workpiece oft

5、en maintain a small discharge gap,when the pulse voltage is applied to the two poles,in that case and at the relative minimum of a gap or at the lowest insulation strength which the dielectric is punctured ，then producing spark and discharge, when in the instantaneous high temperature，a small portio

6、n of the metal of the tool and the workpiece are removed ，each form a small pit.Next the process repeats and repeats.w 工件和工具分別與脈沖電源的兩輸入端相連接。自動進(jìn)給調(diào)節(jié)裝置使工具和工件經(jīng)常保持一個很小的放電間隙，當(dāng)脈沖電壓加到兩極之間時，便在當(dāng)時條件下相對某一間隙最小處或絕緣強度最低處擊穿介質(zhì)，在該局部產(chǎn)生火花放電，瞬時高溫時工具和工件表面都蝕除掉一小部分金屬，各自形成一個小凹坑,接下來該過程重復(fù)發(fā)生。3 The characteristics of the EDMw 1

7、、For high-hardness conductive material processing.w 2、Easy to process slender, thin, brittle parts and complex partsw 3、Workpiece deformation small, high-precision machiningw 4, Easy to realize the automation of machining processadvantagew 用于加工高硬度導(dǎo)電材料。w 便于加工細(xì)長、薄、脆性零件和形狀復(fù)雜的零件。w 工件變形小，加工精度高。w 易于實現(xiàn)加工過程的自動化w 1 Conductive material can only be processed.w 2 Machining accuracy is limited by the loss of electrodew 3 Processing speed is sloww 4 The minimum radius of fillet is limited by the discharge gap.disadvantagesw 只能對導(dǎo)電材料進(jìn)行加工。w 加工精度受到電極損耗的限制。w 加工速度慢