电火花加工英文版ppt 2

EDM high speed puncher
2.3 The principle of the EDM
The principle of electrical discharge machining is based on the tool and workpiece in the working fluid of the insulation between pulsed spark discharge, local and instantaneous high temperature, the surface of metal melt, gasification, cast to the principle of workpiece surface.
Electrical discharge machining
The classification of Non-traditional machining
Electro-chemical machining
High energy density beam machining
2、The main content
Advanced manufacturing technology
Electrical discharge machining
机械4班 Mechanical class 4
Байду номын сангаас
韦永柳 Wei Yongliu
1、The main content
Non-traditional machining
1.1、The concept of Non-traditional machining 1.2、The characteristics of Non-traditional machining
2.1 The origin of the EDM
Edm equipment, in the early 1950 s began to research in China and in the early '60 s was developed first by imitating wire-cut edm machine, then developed with characteristic of our country high speed wire cutting machine tools.
2.2 The concept of the EDM
Electrical discharge machining is used in the working liquid in the pulse discharge between the two poles of galvanic action removal in special processing methods of conductive materials, also called discharge machining or electrical erosion, English abbreviation EDM.
The characteristics of Non-traditional machining
1
1、It is not heavily dependent on mechanical energy, but the use of 3 electricity, light, sound energy and heat energy to remove material. 4
2.1 The origin of the EDM 2.2 The concept of the EDM 2.3 The principle of the EDM 2.4 The processing elements of the EDM 2.5The characteristics of the EDM 2.6 The use of EDM technology
展望
• At present, the various technological indexes of edm machine has reached a very high level, electric spark machine tool has the excellent performance and powerful function. In this case, the further development of presents new characteristics.
3、General won't produce work hardening, and easy to get good processing quality, and a clamping can accomplish fine rough machining
The characteristics of Nontraditional machining
disadvantages • 1）Processing speed is slow. • 2）Electrode loss and secondary discharge impact molding precision,Secondary discharge even makes processing cannot continue. • 3）For the conductive material will not be able to process：Such as plastic, rubber and nylon, etc。
1.3、The classification of Non-traditional machining
The concept of Non-traditional machining
The use of electricity, heat, light, chemical energy, sound energy method for processing.
电火花加工原理如上图
2.4 The processing elements of the EDM
Tool electrode
processing elements of the EDM
working liquid discharge gap
workpiece elctrode
Pulse width and interval
2.5The characteristics of the EDM
advantage
1、EDM machining of complex workpiece，For machining thin walled workpiece, deep narrow groove processing, fine processing has a unique advantage. 2、The precision of edm can reach micron grade and high surface quality,Surface quality can reach the highest Ra = 0.1 mu mirror。 3、Suitable for processing all kinds of conductive materials, no matter how high hardness.
The characteristics of Non-traditional machining
• 2、On the strength of the cutter and workpiece, hardness and stiffness not strictly required.
The characteristics of Nontraditional machining
Ordinary edm shaping machine
The concept of Non-traditional machining
• Mainly used for high strength, high hardness, high toughness, high brittleness, high temperature resistant, resistant to hard cutting material such as magnetic.
2.6 The use of EDM technology
Electric spark forming punching processing The use of electric spark machining technology
Portable electric spark machine tool wire-cut electric discharge machine Edm cold welding
2.1 The origin of the EDM
The electric erosion phenomena in edm was found as early as the beginning of the 20th century.
2.1 The origin of the EDM
But the real electric erosion phenomenon will use to the actual production process is in the middle of the 20th century in the former Soviet union Lin Ke couple lazarus pioneered and invented the electric spark machining method, and in 1943 electric corrosion principle p.a. developed the world's first practical edm device.