At present, the common cold welding machine in the market can be divided into three categories: energy storage resistance welding cold welding machine, also known as mounter. This kind of welding machine uses steel plate and powder as repair materials, and uses the contact resistance between repair materials and workers to repair defects. The picture is shown on the left. The advantages of this machine are: low price, no need of argon protection, easy to carry, suitable for mobile operation, especially suitable for repairing defects with depth less than 0.50 mm

1. It is smaller, lighter (the main engine weighs only 8Kg) and has higher power.

2. Microcomputer control, intelligent adaptation to different thickness of materials, different workpieces and different welding head sizes. Power distribution is more reasonable, and digital display and operation are more intuitive and convenient.

3. Switching power supply technology can still ensure stable high power output and welding quality when the voltage fluctuates within the range of 220 V 20%.

4. Separate the precision welding mode from the precision welding head to provide more support for precision operation. This kind of welding machine uses filament as repair material, and uses high-energy arc with precise control to fuse the repair material and parts with good bonding force. The film is as shown on the left. The advantages of this machine are: high power and fast repair speed. It can be widely used in all kinds of steel, copper, aluminum and related alloys, especially for a large number of repairs.

1. High welding strength: completely metallurgical welding, deeper penetration, and the effect is comparable to that of laser welding.

2. High repair precision: round wire filler can be used for repair, without losing the original datum plane, with less redundant solder and easy post-shaping.

3. Fast repair speed: the fastest repair amount can reach 100mm3/min.

4. Small damage to the substrate: small hot spots will not cause annealing deformation of the substrate.

5. Easy to carry: the whole machine is small in size and weighs 14kg. Imitation laser welding cold welding machine is a professional welder for high-precision repair welding. Ultra-fast laser welding cold welding machine adopts the main power supply technology of microbeam welder produced by German company, combined with international advanced digital pulse control inverter technology, which has the characteristics of stable working characteristics, accurate welding parameter adjustment and control, less welding heat and extremely high welding strength, and can be widely used in the fields of molds, hardware, casting and so on. The principle of repair welding is to make the workpiece and welding wire melt together quickly through high current micro-beam arc pulse and instantaneous high temperature, so as to achieve the purpose of repair welding. Because the pulse discharge time is very short, the heat generated is very small, and the energy is only concentrated at the repaired solder joint, and the welding wire and the workpiece can be repaired within tens of milliseconds, so as far as the workpiece substrate is concerned, the heat generation is small, and the temperature rise of materials other than the solder joint is small, and annealing, discoloration, deformation and other phenomena will not occur.