35KW Medium Frequency Induction Welding Equipment


Rated Power Output:35KW

Frequency Range:1-20KHz

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KEXIN 35KW Medium Frequency Induction Welding Equipment

What is 35KW Medium Frequency Induction Welding Equipment Advantages?

35KW medium frequency induction welding equipment uses a metal material with a lower melting point than the parent material as the solder, and heats the weldment (parent material) and the solder to a temperature higher than the melting point of the solder but lower than the melting point of the parent material, using liquid solder ,the material infiltrates the parent material, fills the joint gap, and diffuses with the parent material to realize the method of connecting weldments.

Welding is a traditional and widely used cemented carbide welding method. Its process is mature and reliable. 35KW medium frequency induction welding equipment is also widely used now.

35KW medium frequency induction welding equipment has the advantages of rapid heating, short solder liquefaction process, and can be carried out in various atmospheres (air, shielding gas, vacuum), which can reduce the overheating and oxidation of cemented carbide and help improve welding quality.

The disadvantage of this method is that the welding equipment is more complicated and the one-time investment is large, followed by the skin effect of the induced current. Whenwelding equipment brazing large and thick workpieces, the heating temperature is uneven, It is difficult to ensure the brazing quality, and the efficiency is low, so welding equipment is generally only suitable for small size weldments with simple brazing structure.

The process parameters of 35KW medium frequency induction welding equipment generally include factors such as brazing gap, heating rate, cooling rate, induction coil shape and size, and the way of adding brazing flux. These factors must have a suitable combination range, and the fluctuation of the factors will have an adverse effect on the quality of the welding equipment, especially in the cemented carbide, which produces a large welding stress.


Welding steel, copper and copper alloys, stainless steel, high-temperature alloys, etc. with symmetrical shapes, especially suitable for pipe fittings, pipes and flanges, shafts and sleeves, and turning tool bit sawtooth welding

35KW Medium Frequency Induction Welding Equipment
Model KXZ-35
Rated Power Output 35KW
Frequency Range 1-20KHz
Input Power Three Phase 380V±20% 50/60Hz
Output Current 10-70A
Output Voltage 70-550V
Load Continuing Rate 100% Continuing work in 24h
Cooling Water Temperature ≤40℃
Water Connection 1 inlet and 1 outlet
Packing Method Wooden Box
Application Available for various heating treatment, melting, forging, welding, brazing, hardening, etc.

Place the metal workpiece to be welded in the induction coil, pass high-frequency alternating current, generate an induced electromagnetic field, couple the surface of the workpiece to generate an induced electromotive force, and form an induced eddy current on the metal surface. The heat generated by the eddy current on the metal surface is usually Coat solder powder and solder when the workpiece reaches the melting temperature of the solder.

medium frequency

Welding equipment is a welding method that uses high-frequency, intermediate-frequency or power-frequency induction current as a heat source. High frequency heating is suitable for welding thin-walled pipe fittings. The use of welding equipment coaxial cables and split-combination induction coils can be brazed on site far away from the power source, and is especially suitable for welding of certain large components, such as pipe joints that need to be disassembled on rockets. It is also often used in pin soldering in the electronics industry. Welding equipment is used to heat the solder joints in the area at the same time, and the tin wire is sent to the solder joints through the tin feeding mechanism to complete the soldering.

During induction brazing, the brazed part of the part is placed in an alternating magnetic field, and the heating of this part of the base material is realized by the resistance heat of the induced current generated in the alternating magnetic field. The higher the frequency, the smaller the depth of current penetration. Although the surface layer is heated quickly, the thickness of the heating is thinner. The interior of the part can only be heated by the heat conduction from the surface layer to the interior. Welding equipment is the so-called skin effect. Induction coil is an important part of induction welding equipment. The basic principle of correct design and selection of induction coils is to ensure rapid, uniform heating and high efficiency in the welding year. Generally, the welding equipment induction coil is made of pure copper tube, and the tube is cooled by water during operation. The thickness of the tube wall should be less than the current penetration depth, generally 1~1.5mm. It can be seen that welding equipment is not advantageous to select an AC frequency that is too high.

Generally, a frequency around 500kHz is more appropriate. In addition, the skin effect is also related to the resistivity and permeability of the material. The larger the resistivity, the smaller the permeability, and the weaker the skin effect. On the contrary, the skin effect is more pronounced.

What are the welding steps?

Assuming you glued everything together correctly, you can now go back and fill the remaining seams with welds. This is where you really need to hone your welding skills, so pay close attention to how the welding torch angle, travel speed, and electrical viscosity affect the appearance of the welding.

The most important thing to consider when performing these welds is to maintain the consistency of the above categories. In other words, once you have determined the correct torch angle, do not change it midway through welding. Your travel speed should be quite fast, and you don’t want to speed up or slow down during the welding process, but to maintain a constant speed. Finally, your electrical extension should not exceed 1/2 inch or less than 1/4 inch, so it is best to keep it around 3/8 inch.

Mastering the consistency of the welding technique is the key to being able to weld proficiently. Some practice is required before the weld looks perfect. If the effect is not good on the first try, please keep this in mind, and please be patient to remind yourself that the exercise is perfect.


What is high frequency induction welding?

High-frequency induction welding is used to make the strip into a tube or tube, and then feed it into a roller, which makes the strip into a cylindrical shape. The overlapping edges converge between the squeeze rolls to create a V-shape at the welding point. The included angle of steel is usually 2-5°.

The high frequency coil introduces current into the tube before the squeeze roller. The current is concentrated on the edge of the V-belt, and the resistance heats a narrow area of ​​the edge to the welding temperature. The squeeze roller consolidates the weld by expelling any molten material and contaminants, and forming small up-forged beads on the inside and outside of the pipe. These beads can be scraped off the tube immediately to provide a smooth surface.

Will induction heating increase my utility bills?

Not likely. Induction heating is a very effective, efficient means of heating. Most of our customers who are switching to induction for the first time see their utility bills go down.

Heat Treatment (surface hardening, quenching, annealing, tempering).

Diamond circular saw blades, carbide tools (turning tools, milling cutters, drill bits, etc.), mold mining tools (drill bits, coal drills, etc.), refrigerator compressor pipe fittings, transformer copper wire, motor copper wire copper row, automobile pipe fittings, etc. Copper-silver-tin induction brazing.


Non-ferrous and ferrous metals melting.
Precious metal melting, like gold, sliver and platinum, etc.
Semiconductor material melting.
Specialized steel, iron and copper melting.
Metal alloy melting, like aluminum alloy, zinc alloy and copper alloy,etc.


Welding diamond/carbide saw blade,  diamond cutting tools, grinding tools and drilling welding.
Carbide cutting tools for machining welding. Such as turning and milling cutter welding.
Mining tools welding, such as  pillar gear drill bits, dovetail coal drill bits, drill rods riveting, all kinds of shearer.
The welding of wood working tools, such as woodworking planer, milling and drill.


Hot forming for all kinds of standard parts, fasteners, machinery parts, hardware tools and straight shank twist drill. Metal annealing, such as: tensile steel; wire, nail wire heating and stainless steel annealed.

Packing Details

Export standard packing, inner carton outer wooden box and double protection



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