What are the cooling methods of spot welding machine?

Cooling is one of the measures to ensure the normal operation of the intermediate frequency spot welding machine, the cooling medium should be soft water, not hard water, if there are more salts in the water quality, the inner wall of the cooling pipe is easy to foul, the light pipeline is not smooth, reduce the cooling effect, and the heavy is blocked, because the cooling water consumption of Anjia intermediate frequency spot welding machine is larger, so it is best to use the softened circulating water, which can ensure a constant water supply and save water.

There are five parts that need to be cooled by Anjia intermediate frequency spot welding machine

1. Welding transformer:

Due to the high primary current density of the welding transformer, the secondary stage is water-cooled, and the transformer shall not be welded before the cooling water is turned on.

2. Upper electrode:

The upper electrode head can not be too large due to various conditions, and the pressure is applied in the case of high current density, sufficient water flow is required to cool, and the inlet and outlet water pipe connections of the upper electrode can not be connected in series too much, generally with 3-4 as a series group.

3. Lower electrode:

The lower electrode is generally divided into plate type, the longest can accommodate 12 solder joints, the shortest at least two solder joints, due to the large volume of the lower electrode, the heat dissipation surface is large, so the cooling requirements for it are not too emphasized, generally with 12 solder joints as a water inlet and outlet series circuit.

4. Oil tank: The hydraulic oil of the oil tank has a temperature rise due to various reasons, and most of the current hydraulic pump stations are equipped with coolers, when the oil temperature rises to 55 °, it is automatically cooled by water to ensure the normal operation of the hydraulic system.

5. Crystal valve tube:

In order to ensure normal operation, a water flow control valve is set on the cooling pipe, and the circulating water does not reach the required flow rate and does not conduct the crystal valve tube.

The cooling system is also equipped with an inflatable exhaust valve, which is used to protect the transformer, especially in the low temperature in winter, when the welding machine is not working, the water in the pipeline should be blown out with compressed air, which can avoid the damage of the welding transformer water pipe due to ice expansion.

Energy heat pump water heater is also known as "air source heat pump water heater", "heat pump water heater", "air energy water heater" and so on. The heat pump in an air energy heat pump water heater (air source heat pump water heater) absorbs low-temperature heat energy from the air.

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There are two kinds of air cooling and water cooling, which are generally connected to the water cooler and water cooled.

The use and welding methods of the cold welding machine are as follows:

1. Clean up the oil or rust on the surface of the workpiece;

2. Turn on the main power switch on the rear panel of the host and press the start button;

3. According to the actual working conditions, select the welding mode, pulse current and pulse time.

4. Open the argon cylinder valve and adjust the argon throttle valve.

5. Put the welding torch in a suitable position and press the foot switch to produce a solder joint. Repeating this action continuously results in a wire bond with a certain height and width. If you are very proficient, you can select the "Continuous Single Point" button on the panel in the "Continuous" state, and press and hold the foot switch, at this time, the device will continuously output pulses to produce continuous solder joints.

6. When stopping work, the power supply of the welding machine should be turned off and the argon cylinder valve should be closed. (After the welder is turned off, the display on the machine panel will continue for a period of time until the residual power is discharged.)

Precautions for the use of cold welding machine

1. Preparation and installation of electrodes.

The electrode is made of tungsten-cerium electrode (available at general welding material stores). A small number of defects in the corners and planes of the general edges. with a diameter electrode.

When the amount of welding repair is large, the welding current is also large, so a diameter electrode can be used. In general, the length of the tungsten needle exposed to the air port is about 8mm. Too long exposure can easily lead to insufficient argon protection, making the solder joints yellow or black.

The exposure is too short, and the operation line of sight is not good.

2. Selection of welding wire.

In general, the same wire as the base metal should be selected. If they are not exactly the same, at least choose a wire with similar properties. Some materials with a high carbon content, such as iron castings, will experience the problem of hardening of the repair points when repairing.

At this time, thin welding wire and low power should be used as much as possible to reduce the thermal effect.

The principle of the multi-functional cold welding machine is to use the charging capacitor to discharge in an ultra-short time of 10 3 10 1 seconds cycle and 10 6 10 5 seconds. The contact between the electrode material and the workpiece is instantly heated to 8000°C to 10000°C, and the molten metal in the plasmaized state is metallurgically transitioned to the surface of the workpiece. Figure 1 on the left shows a schematic diagram of overlay and coating and its various characteristics.

Zone A is the coating or overlay layer that is welded to the surface of the workpiece, due to the formation with the base metal.

The alloying action spreads to the inside of the workpiece, and the diffusion layer B is formed, and a high-strength bond is obtained. Why can the multi-functional cold welding machine achieve cold welding? As shown in the figure on the right, the time between discharge (pt) and the interval between the next discharge (it).

In contrast to the very short period of time, the machine has enough relative stopping time for the heat to diffuse through the workpiece substrate to the outside world. As a result, there is no accumulation of heat in the machined part of the workpiece. Although the temperature of the workpiece is almost at room temperature, the temperature of the electrode tip can reach about 10,000°C due to instantaneous melting.

When using a cold welder for repair surfacing welding, why is the bond strength still high since the heat input is low? This is because the electrode instantaneously generates molten metal droplets that transition to the contact point with the base metal, and at the same time, due to the high temperature of the plasma arc, a strong diffusion layer is formed deep within the surface layer as if it had taken root (as shown in the figure on the left). It exhibits high adhesion, and can be directly processed such as milling, filing, and grinding without falling off.

The principle of the cold welding machine is that the electrical energy stored in the capacitor can be released to the tungsten electrode in the form of a pulsed arc instantaneously.

Between the workpiece, the extremely high temperature arc makes the metal material and the welding wire melt together quickly and fuse together, so as to achieve the purpose of welding and repairing.

Hello, the pro-cold welding machine can be used for deposition, sealing, filling and repairing defects such as wear, scratches, porosity, cracks, defects and deformations, hardness reduction, trachoma, and damage of metal workpieces. Simple operation, low heat input, no heat input in the instantaneous process of surfacing welding, so the mold does not deform, anneal, undercut and residual stress, and does not change the metal structure of the mold or product. The repair accuracy is high, and the coating thickness is from a few microns to a few millimeters, and only grinding and polishing are required.

It can also perform various types of machining such as turning, milling, planing, grinding, and post-processing such as electroplating. The equipment is advanced and reliable, German local technology, international standard high-power argon protection, and can work for a long time. Applicable substrates:

Including low carbon steel, medium carbon steel, die steel, stainless steel, tool steel, cast iron, cast steel, cast aluminum, aluminum alloy, copper alloy, nickel alloy, carbon tungsten alloy, etc., as well as all conductors that can conduct electricity. The principle of cold welding machine realizes cold welding (low heat input): 1. Hairing on the surface of plastic molds in the mold manufacturing industry to increase aesthetics and service life; Helmet plastic mold parting surface surfacing repair; Aluminum alloy die-casting mold shunt cone surface strengthening; Repair and strengthen the mold cavity out-of-tolerance, wear, scratches, etc.

2. Repair of rubber and plastic machinery parts in the plastic and rubber industry, and molds used for rubber and plastic parts are out of tolerance, wear and repair. 3. Repair or repair of aircraft engine parts, turbines and turbine shafts in the aviation and aerospace industry, surface strengthening and repair of rocket nozzles, repair of aircraft outer plate parts, strengthening or repair of artificial satellites, local carburizing and strengthening of titanium alloy parts, local carburizing strengthening of iron-based superalloy parts, surface infiltration of magnesium alloy A1 and other anti-corrosion coatings, local defect surfacing repair of magnesium alloy parts, local surfacing repair of nickel-based cobalt-based superalloy blade workpieces, such as: wear of the damping surface and tip of the blade crown and ablation of the guide vane.

4. Automobile and locomotive manufacturing and maintenance industryIn the automobile manufacturing and maintenance industry, it is used for cams, crankshafts, pistons, cylinders, brake discs, impellers, aluminum hubs, wheel rims, clutches, friction plates, exhaust valves, etc. 5. Repair of electric crankshafts, bushings, bearings, electrical components, resistors, etc. in the shipbuilding and power industries, welding of electric railway locomotive wheels and bottom line track connecting pieces, and production and welding of conductive rollers and metal oxidation treatment copper and aluminum electrodes in electroplating plants. 6. The machinery industry corrects out-of-tolerance workpieces and repairs machine tool guide rails, various shafts, cams, hydraulic presses, hydraulic press plungers, cylinder walls, journals, tie rollers, tooth tans and quiet wheels, pulleys, mandrels, plug gauges, ring gauges, various rollers, rods, columns, locks, bearings, etc.

7. Repair of defects such as sand hole and porosity of iron, copper and aluminum castings in the casting industry, and repair the wear and tear of aluminum models. 8. The stirring shaft and slurry of the chemical industry reactor can be welded with a wear-resistant and corrosion-resistant layer. In this way, pump plunger, pump impeller, pump casing, sealing ring, shaft sleeve, valve sealing surface, valve stem, valve core, fan blade, compressor crosshead, acid-resistant pump plunger impeller, sleeve and ring parts can be processed.

2) Characteristics of cold welding machine: The product has high power and popularity, and is mainly used for casting, electric power, etc

Summary. Hello dear<>

The principle of cold welding machine is as follows: the principle of cold welding machine is to use the charging capacitor to discharge in an ultra-short time of 10-3 10 1 seconds cycle and 10-6 10 5 seconds. The contact between the electrode material and the mold is heated to 8000 to 10000°C, and the molten metal in the plasma state is metallurgically transferred to the surface of the workpiece.

2. Operation steps for the welding of the cold welding machine: 1The angle of holding the welding torch in hand - and the angle of the workpiece should be kept between 75-90 degrees, not too oblique, too oblique, the weld color is black.

If the switch is used to control the foot, the grip of the torch can be used to hold the knowledge of the pen. 2. Keep the tip of the tungsten needle and the weld area within the range of 1mm (mm), but not next to the workpiece (avoid sticking the needle). The bottom of the ceramic nozzle can be leaned against the welded workpiece, so that the distance is better grasped 3

From top to bottom, from left to right, each solder joint presses one-third of the previous solder joint, and welds in order. 4.Tungsten needle (ordinary thorium tungsten is better to use according to experience), within 5mm of the spout.

The porcelain nozzle is self-opening notched for easy observation of the tungsten needle. 5.For internal angle welding, it is necessary to adjust the length of the tungsten needle, appropriately extract the tungsten needle according to the angle of the inner angle, and open the argon gas appropriately to ensure the silver white of the solder joint.

Operation steps 1 of the cold welding machine fusion welding wireTry to press the welding wire flat on the workpiece by hand, and the tip of the tungsten needle is within 1mm obliquely above the welding wire, not next to the welding wire and the workpiece.

The principle, use and use of cold welding machine.

Hello dear<>

The principle of cold welding machine is used and used as follows: the principle of cold welding machine is to use charging capacitors to discharge in an ultra-short time of 10-3 10 1 seconds cycle and 10-6 10 Tuanchang 5 seconds. The contact between the electrode or the material and the mold is heated to 8000 to 10000°C, and the molten metal in the plasma state is metallurgically transferred to the surface of the workpiece.

2. Operation steps for the welding of the cold welding machine: 1The angle of holding the welding torch in hand - and the angle of the workpiece should be kept between 75-90 degrees, not too oblique, too oblique, the weld color is black.

If the switch is used to control the foot, the grip of the torch can be used to hold the knowledge of the pen. 2. Keep the tip of the tungsten needle and the weld area within the range of 1mm (mm), but not next to the workpiece (avoid sticking the needle). The bottom of the ceramic nozzle can be leaned against the welded workpiece, so that the distance is better grasped 3

From top to bottom, from left to right, each solder joint presses one-third of the previous solder joint, and welds in order. 4.Tungsten needle (ordinary thorium tungsten is better to use according to experience), within 5mm of the spout.

The porcelain nozzle is self-opening notched for easy observation of the tungsten needle. 5.For internal angle welding, it is necessary to adjust the length of the tungsten needle, appropriately extract the tungsten needle according to the angle of the inner angle, and open the argon gas appropriately to ensure the silver white of the solder joint.

Operation steps 1 of the cold welding machine fusion welding wireTry to press the welding wire flat on the workpiece by hand, and the tip of the tungsten needle is within 1mm obliquely above the welding wire, not next to the welding wire and the workpiece.

2.Special attention should be paid to the tungsten needle tip can not be welded above the wire, so that the welding wire balloon can not melt, must be welded at the front end of the wire.