Managed to develop cost-effective technology electrical discharge machining the surfaces of solids
Researchers of the Joint Institute for Nuclear Research could improve the efficiency of electrical discharge machining of large and complex the profile of solid surfaces, including internal, with low power consumption devices.
This achievement can be used to improve the wear resistance, the formation of discrete zones of high-temperature superconductors doping, deposition of metal nanoclusters on the surface of semiconductors and dielectrics, as well as the modification of the properties of thin-film products, and many other areas.
?With the application of electrical discharge machining produce metal layers on a solid surface, cutting and forming depressions of various geometric profile |, say the authors of the development - SN Dmitriev, VF Reutov Reutov and IV, JINR. ? For this purpose, electrodes are used in various fields - disc, rod, tube or wire. In general, these electrodes are used for makroobrabotki, i.e. have a size (diameter, thickness) of at least tens to hundreds of micrometers. Therefore, the area one time (during the period of a single pulse) treatment of solid surfaces is more than 100 mkm2. In addition, the existing makroelektrodami difficult or almost impossible to handle the internal surface of the parts and the surface of the complex profile. |
At present, due to the intensive development of nanotechnologies in the field of problem solving Microengineering, micromechanics, microelectronics, etc., the question of micro surface treatment, thin film products, as well as ensembles of surface modification of nano-metal clusters or sub-micron diameters and high density.
Modern methods of treatment remain a range of shortcomings that limit the further development of nanotechnology.
They are:
- the absence of stick electrodes and the Bole sub-micron diameter nanomikronnogo,
- impossibility of applying the nano metal clusters or submicron dimensions given density onto the surface of solid bodies,
- difficult to implement automatic deduction given electrode gap,
- complexity precision scanning procedure of the object on the surface of the electrode, particularly in its complicated profile machined surfaces,
- Availability complicated and energy-consuming equipment for the realization of high levels of electric field at the electrodes, especially for forming the arc discharge,
- inability to control the weight of conveyed material in the electrode spark erosion, especially if physical contact to electrode.
Dmitriev and his colleagues managed to solve this problem and improve the efficiency of electrical discharge machining process by handling large and complex the profile of solid surfaces (including domestic) and a low power consumption of the equipment.
The principle that lies at the core of their technology is the use of metal replicas of track membranes made on the basis of the known method used for electron microscopy analysis of profiles etched channels in the membranes of track, first used as a system mnogosterzhnevyh electrode (SMSE) nano-and submicron diameters for electrical discharge machining of solid surfaces.
As the material metal replica (MR) may be any of pure metals or alloys thereof capable of electroplating. And the process can be carried out in any environment (vacuum, liquid or gas) that does not create difficulties and costs of creating some special conditions.
This technology provides the control and reproducibility of the size, volume and density of the metal nanoclusters on the surface of the object being processed, enables a simultaneous treatment of large areas of any geometric profile including internal cavities and allows for the electrical discharge machining thin film objects, with minimum energy consumption and low flow rate of the electrode material.
Contact information:
Joint Institute for Nuclear Research
141980, Moscow region., Dubna, JINR, Ch. engineer, IN Meshkov
