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The instruction of Cold Welding Machine
- Dec 17, 2018 -

The instruction of Cold Welding Machine

Brife introduction  

          The cold welder is called ESD(ELECTRO SPARK DEPOSITION) internationally and was developed by experts from the former Soviet Union using circuit principles similar to those of electric discharge machines. The main purpose is to use a high hardness tungsten carbide and other materials to coat the mold / metal surface to improve wear resistance, heat resistance and other properties. The original processing machine coating thickness can only be up to 30μm, so it can not meet the repair needs.

         After a lot of research and development, the output power was improved, and the structure of the torch and the composition of the electrode material were improved. The cold welder fuses the special welding wire to the damaged part of the workpiece through the high thermal energy generated by the micro-electrical instantaneous discharge, and is firmly welded to the original substrate, and only after a small polishing and polishing process is post-weld.

Principle

        The principle of the multi-function cold welder is to use a charging capacitor to discharge in an ultra-short time of 10-6 to 10–5 seconds in a period of 10-3 to 10–1 seconds. The contact portion between the electrode material and the workpiece is instantaneously heated to 8000 ° C to 10000 ° C, and the molten metal in the plasma state is metallurgically transferred to the surface layer of the workpiece. Figure 1 on the left shows a schematic diagram of the overlay welding, coating and various characteristics. Zone A is a coating or surfacing layer that is deposited on the surface of the workpiece. Due to the alloying effect with the base metal, it diffuses and infiltrates into the interior of the workpiece, forming a diffusion layer B, resulting in a high-strength bond.

Advantage

         1.Reasonable design and free adjustment. Different discharge frequency can be selected according to different metal materials to achieve the best repair effect.

         2.The heat affected area is small. There is no heat input during the instant of stacking, so there is no deformation, undercut and residual stress. Local annealing will not occur and no reheating is required after repair.

         3.Very small welding compensation impact, the welding machine overcomes the phenomenon of ordinary argon arc welding on the periphery of the workpiece during the welding repair process. It is also safe to repair the workpiece surface without any allowance.

         4.High precision of repair: the thickness of surfacing is from a few microns to a few millimeters, just grinding and polishing.

         5.High welding strength: Strong bonding force due to sufficient penetration into the surface material of the workpiece. 6. Easy to carry: light weight (28-30 kg), 220V power supply, no working environment requirements.

         6.Economical: Immediately repaired on site to improve production efficiency and save costs.

         7.Easy to carry: light weight (28-30 kg), 220V power supply, no working environment requirements.

         8.Multi-purpose machine: It can carry out surfacing, surface strengthening and other functions. The required weld overlay and strengthened thickness and finish can be obtained by adjusting the discharge power and discharge frequency.

         9.Surfacing layer hardness and replenishment diversity: Different electrode rod materials (refills) can be used to obtain different hardness requirements. The hardness of the surfacing repair layer can be from HRC 25 ~ HRC 62 .

        10.Host control system: Double closed-loop precision control with improved built-in CNC microcomputer. Its stability and running ability are far superior to similar products, using intelligent IC control board.

        11.Gas protection system: It is changed to the synchronous argon protection system controlled by microcomputer, which makes the argon gas protection better, the welding effect is more firm and beautiful. At the same time, it maintains its original advantages and is comparable to expensive laser welders to maximize argon savings.

        12.Installation conditions and consumables: Temperature: 28 ° C, humidity: 5% -75%, no condensation. Power: 220 volts 50 Hz AC, stable voltage. Environment: Clean and free of dust or dust. Main consumption: welding wire, argon, electricity.

Range of application      

Repair defect

        ●Pinholes, air holes ●Burrs, flashes ●Bumps, scratches ●Chamfering angles, sag angles ●Blinds, cracks ●Wears, indentations ●Manufacturing errors, manufacturing defects, welding defects

        ● Sharp corners, sharp edges ● Grooves, side walls ● Bottom, deep cavity ● Plane, type ● On-site repair on production line

The harm of the cold welder to the body

        The cold welder's iron is mainly considered to have an effect on the body: the radiation of the arc and the ozone generated when the electrode is burned.


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