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Currently, an endless stream of new material blade, but still occupy an important position carbide blade, especially machine folder carbide blade is more widely used. Processing methods mainly in grinding grinding grinding cracks, however, a serious impact on the processing quality and service life of the blade. Therefore it is necessary to change the processing method to improve the performance of the machine folder carbide inserts. EDM used in this method, which belongs to electroerosion machining, heat affected zone is small, and therefore can be a good solution to the problem of microscopic cracks grinding generated. EDM, the most important is the set of processing conditions, and if the processing conditions are not properly controlled, the blade also may have surface defects such as cracks, affecting the life of the blade. Therefore necessary to conduct in-depth study of the process of EDM carbide blade, to provide a reference for the actual processing. In addition, in order to improve the efficiency of mass production of this blade, the research and development of special fixtures imperative. Therefore, the specific content of this study are as follows: 1. Designed a special fixture, automatic completion of the workpiece in rapid clamping and equipped with automatic correction of the electrode device. This set of devices can be achieved without the need for handling by the fast electrode correction compensates electrode, it is possible to greatly improve the processing efficiency, especially for large volume production machine folder carbide inserts significance. 2 to the processing speed, the electrode wear rate and surface roughness as Evaluation EDM machine folder carbide blade performance indicators, a detailed analysis of the pulse width, peak current, processing polarity machining voltage, and other factors of its blade processing law, and get the best processing parameters of the single factor of the blade. Folder carbide blade (center hole) EDM machine processing technology research and content for the study of the pulse width, peak current, machining voltage, orthogonal experiment to obtain the optimal processing parameters. Experimental results show that the process parameters in combination in a certain range can be a better quality of the blade center hole, and to take into account the machining efficiency, this combination is: a positive polarity machining, I = 1A, ti = 20μs, U = 100V. Folder 4 on the machine surface of the carbide inserts processing EDM surface coating treatment, so that the coating layer thickness increased to 5 μm or more, so that the coating adhered more firmly, not falling, improved blade life of 5 to 10 times.
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