Bolt and nut connection is one of the most basic assembly in the electromechanical industry. When the coupling is too tight, the bolt is prone to metal fatigue under the long-term action of mechanical force and electromagnetic force, and the coupling or shearing of the thread is too loose. To loosen the assembly between the parts and cause an accident. For the bolting and nut connection of electrical engineering conduction current, not only the mechanical effect should be paid attention to, but also the electrothermal effect should be paid attention to. The crimping is not tight, the contact resistance is increased, and the heat is generated during the energization - the vicious cycle of contact surface oxidation-resistance increase Until severe overheating, burning joints, causing a short circuit to ground, disconnection accidents. For primary equipment and busbars, the parallel groove clamps, T-clamps, equipment clamps, and wiring of the connecting wires may cause accidents of different degrees.
Mirror EDM, mirror EDM is mainly used in the precision machining of complex mold cavity, especially the complex curved surface which is not convenient for polishing. It can save the manual polishing process, improve the performance of parts, and shorten the mold manufacturing cycle. Very important practical significance.
After the conductive fine powder enters the discharge gap, it is equivalent to inserting multiple small conductors between the two poles, and also distorts the electric field in the discharge gap, which reduces the resistance to breakdown of the insulating medium in the gap, and discharge easily occurs, and the discharge gap increases accordingly. . The increased discharge gap reduces the initiation effect of the electric corrosion products on the discharge, and is conducive to the flow and discharge of the electric corrosion products, thereby reducing the occurrence of concentrated discharge and making the discharge evenly distributed on the processing surface. The discharge gap increases and the discharge channel becomes thicker. Under the same discharge pulse energy, the heated area of the workpiece surface increases and the heated intensity decreases, thereby forming large and shallow discharge pits on the surface of the workpiece. At the same time, the increase of the discharge gap also reduces the discharge ability of the molten metal to the discharge, allowing more molten metal to re-solidify on the surface of the workpiece, further reducing the depth of the discharge pit. Therefore, powder-mixed EDM forms large and shallow discharge pits on the surface of the workpiece.
Powder mixed Electrical Discharge Machining forms large and shallow discharge pits on the surface of the workpiece and the uniform distribution of discharge pits is the fundamental reason for reducing the roughness of the processed surface
Electrical Discharge Machining
Edm Mold Parts,Sets Machining Part,Ultrasonic Roller Making,Electrical Discharge Machining
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