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  1. What is similar and different in the ECM and electro-erosion machining at die-sinking and hole-contouring machines?

    Their similarity is in the kinematic-geometrical scheme of geometry generation:

    • EDM electrodes with a similar design of a working part are used;
    • Advance (as a rule, this is one-axis movement) of EDM electrode towards a blank is made;
    • Processing is conducted at small gaps between the tool and blank;
    • Essential force impact on the blank is absent;
    • Removal metal from the blank occurs more intensively in places with smaller interelectrode gaps.

    The main distinction of methods consists in the physical mechanism of metal removal. Electric erosion machining is a process of dimensional destruction of a material under the influence of the non-stationary electric discharge in liquid dielectric that is interfaced with its fusion and evaporation, accordingly, with change of structure of a facial layer. Electrochemical processing is based on high velocity dimensional anode dissolution of metal under the influence of high density electrolysis current. The main advantages of the ECM are absence of EDM electrode wear, and also heat and power damage of the processed surface of a part.

  2. What are differences and advantages of ET-technology and equipment for impulse ECM by P company in comparison with traditional ECM?

    Advantages of technology and equipment by P Industrial LLC in comparison with traditional ECM:

    • Higher accuracy of processing (repeatable accuracy 2 micron, resolution at copying 0,5... 3 micron);
    • Higher quality of the processed surface (to Ra 0,01, increase of corrosive resistance of nanostructure and ultrafine-grained steels, absence of hydrogen absorption by titan and its alloys);
    • Higher predictability of the ECM process;
    • More simple design of production accessories due to provision of necessary status of electrolyte fluid in the interelectrode space by tool vibration and electric mode parametres;
    • Effective high velocity system of recognition and prevention of short circuits (prevents irreparable damage of EDM electrode).
  3. What are ECM advantages in comparison with machining operations?

    • In one operation the shaped form is made with high accuracy and finishing quality of the surface at simple translational movement of the tool;
    • There is no tool wear;
    • There are no whiskers and sharp edges;
    • Physical and mechanical properties of a blank material (hardness, durability, viscosity) do not render essential influence on indicators of machinability;
    • EDM electrode is made from cheaper and free-cutting materials (brass, stainless steel).
  4. On your site it is specified that your machines allow to carry out electrochemical polishing to roughness of Ra 0,02 micron. What are advantages of your machines in comparison with mechanical methods of finishing processing (grinding, polishing, super fin

    Unlike the majority of mechanical methods of finishing processing, the ECM allows to provide finishing quality of a facial layer practically on any forms of surfaces, and not just on flat and cylindrical. Besides, surfaces after the ECM has isotropic (identical in all directions) roughness without grooves, score marks, traces from tool movement over the surface. We will mark that at the ECM the finishing processing (polishing) of the surface is provided in one operation with dimensional generation of geometry, therefore it is not necessary to have a scale of machining/ electroerosion and other machines for roughing/prefinishing/smoothing/finishing processing.