Study On WEDM Of Rotating Surface Of B₄C Ceramics Based On Tracking-electrode

Along with the development of the society and the elevation of the people's living standard, people's request for appearance design, service life, machining accuracy etc. of the mechanical products is increasingly high. Choosing the engineering ceramics material and it's components which have the character of high strength, high toughness, high hardness and fireresistant, has already become the main path of improving the product quantity in mechanical processing and the product parts service life. Boron carbide as the representative engineering ceramics has become the focus of research at home and abroad.Wire electrical discharge machining(WEDM) technology developed quickly and applied widely at present. For the particular characteristic it has is adopting pulse energy in electrical corrosion processing, WEDM is the perfect method of machining fragile, superhard engineering ceramics.This article makes that machining engineering ceramics rotating surface to be possible with Wire Electrical Discharge Grinding theory and improved HSWEDM which added main spindle slewer. But through monitoring discharge waveform in the course of experimentation and measuring WEDM boron carbide ceramic rotary-body's surface roughness, we find that the processing stability of long engineering ceramics rotative surface's WEDM is not good and workpiece surface quality is very low. So this article mainly aim at proceed research .Bring forward import tracking-electrode device to ameliorate processing stability and workpiece's surface quality. Besides, design orthogonal experiments to analyse the effect of electrical parameters to surface roughness.This article carry through tracking-electrode device's structure design and analysis of virtual prototype. Firstly, through measuring and analysis of machine tool's dimension and main spindle slewer, using mechanical optimization design method scheme out track-electrode device's model. Use the engineering software CATIA to design tracking-electrode device's structure. According to the drawingthe whole tracking-electrode device which adopt aluminium and steel was manufactured and realized good electric conductivity and stability. Afterward, kinematics and kinetics simulation analysis were accomplished with engineering analysis software ADAMS. it Approved that the tracking-electrode device can content motion aspect's requirement. Finally, twice experiment validate that adopting tracking- electrode device for WEDM (tracking-mode electrical discharge machining) long boron carbide engineering ceramic rotative-body surface can enhance processing stability and workpiece's surface quality effectively.This article studied on surface roughness of long rotative-body boron carbide engineering ceramics after tracking-mode electrical discharge machining. Orthogonal experiment was designed to investigation electrical parameters variation opposite effect of workpiece's surface roughness. Based on the result of orthogonal experiment analysis, we know that electrical parameters effect gradation of tracking-mode electrical discharge machining long boron carbide ceramic rotative-body's surface roughness is pulse width, peak current, pulse interval and pulse width ratio. According to the result of orthogonal experiment, we get a set of optimum parameters: peak current is 10 A; pulse width is 16μs; pulse interval and pulse width ratio is 5. We also made each electrical parameters factor's trend analysis, and find that effect rule of surface roughness by electrical parameters. Eventually, by experimental verification, It was found that tracking-mode-spark machining long boron carbide ceramic rotative-body's surface roughness can reach 1.274μm. This result already reached the leading standard on WEDM boron carbide rotating surface, which have important meaning on the application of the long rotative-body engineering ceramics.The research of tracking-mode electrical discharge machining long boron carbide rotating surface attest that tracking-electrode device can bring up processing stability and workpiece's surface quality effectively. In addition, the viewpoint of tracking-mode electrical discharge machining long rotative-body engineering ceramics and the study on effect rule of rotating surface roughness byelectrical parameters have instructional action to practical production ,and offer reference to further research and development of WEDM engineering ceramics.