High frequency welding machine
First, the high frequency welding machine application industry:
1. Welding of diamond cutter heads, welding of carbide saw blades and welding of diamonds, grinding tools and drilling tools.
2. Welding of hard alloys for machining. Such as turning, planing, milling, reaming and other cutting tools.
3, welding of mining tools, such as "one" word bit, column tooth bit, dovetail coal bit, riveting bit, all kinds of coal mining machine picks, various types of roadhead picks welding.
4. Welding of various woodworkers, such as welding of various woodworking planers, milling cutters and various woodworking drill bits.
Second, the main features of high frequency welding machine:
1, fast, high efficiency
2, energy saving and low energy costs
3. It can weld multiple workpieces at the same time, which greatly improves the welding efficiency.
4, the oxidation area is small,
5, uniform heating, no shortage of welding and solder joints
6. The weld of the workpiece after welding is firm and full.
Third, high frequency welding machine technical parameters:
Cooling water flow (host)
Operating voltage range
Cooling water pressure
0.1 to 0.3 MPa
Maximum input current
Water temperature protection point
55 ° C
Maximum output power
Mainframe dimensions (mm 3)
Load continuation rate
4. What is the connection between the inductor and induction coil of high frequency induction brazing?
The inductor of high frequency induction brazing is an important component in induction brazing equipment, and the energy of the AC power source is transmitted to the weldment for heating. The inductor is generally composed of an induction coil, a manifold (plate), and a cooling device. The induction coil is the core component of the inductor.
Induction coil design: The current through the induction coil is large, so the induction coil must be water-cooled. It is recommended to use φ 5 or more, copper tube with a wall thickness greater than 1MM , and a copper tube to make the induction coil to reduce the heat loss of copper and improve Heating efficiency
The design of the induction coil directly affects the heating effect. It is recommended to use the induction coil designed by the manufacturer. If you design it yourself, you must consult the manufacturer.
The size of the induction coil, the number of turns of the induction coil, the material and shape of the workpiece, and the choice of the number of turns of the extension joint require proper matching to achieve higher heating efficiency and better heating effect. When other conditions are constant, the larger the induction coil, the more the number of turns, and the lower the frequency.
Five, induction brazing operation safety and protection
Induction brazing is the application of a brazing member to an induction current to heat the weldment. Production practice shows that the current frequency is widely used in induction brazing, and can be selected between 10- and UVkHz . Commercially available high and vacuum tube high frequency power supplies are currently available for induction brazing. A high-frequency induction heating power supply leaks heavily in high-frequency electromagnetic fields during operation, and it constitutes serious electromagnetic wave pollution to its surrounding environment. It mainly manifests in two aspects: radio wave interference and damage to personnel and body health, and the intensity of pollution is high. The power of the frequency power supply is in a positive ratio. Therefore, when performing induction brazing, it is necessary to take strict measures to prevent high-frequency electromagnetic field leakage, so as to reduce the pollution to the environment and the human body, so as to achieve harmless degree. It is mainly caused by dysfunction of the central nervous system and autonomic dysregulation of sympathetic nervousness. The main symptoms are dizziness, headache, general weakness, fatigue, insomnia, forgetfulness, irritability, low work efficiency, and symptoms such as sweating and weight loss. However, the obstacles that cause the above functions are not organic changes. As long as they leave the work site for a period of time, the human body can resume production. The practical experience shows that the most effective protection for high-frequency heating power supplies is effective for the electromagnetic fields leaked out. Ground shielding. Generally, the overall shielding is adopted, that is, the high-frequency equipment, the feeder, the induction coil, and the like are placed in the shielding room, and the operator operates outside the shielding room. The walls of the shielded room are generally made of aluminum, copper or steel, and the thickness is generally 1.2-1.5 mm . During operation, the movable door or window can be installed on the part to be observed. Generally, a 40- mesh ( 0.450 mm aperture ) copper wire is used to shield the movable door or window. For high-frequency high-frequency equipment, the composite shielding method can also be used to enhance the protection effect. Generally, high-frequency leakage sources such as high-frequency transformers and feeders are partially shielded by metal plates or double-layer metal meshes in the shielded room. In order to solve the problem of heat generation in the near-field device with high field strength, the shield cover needs to have a proper gap. To cut off the induced current, which of course is detrimental to high frequency protection. In addition, in order to work safely for high-frequency heating equipment, it is required to install a dedicated ground wire with a grounding resistance of less than 4n . And around the equipment, especially the worker's operating position should be auxiliary pressure 35kV insulation rubber sheet. Before starting the operation of the equipment, carefully check the cooling water system. Only when the water cooling system is working properly, allow the preheating of the oscillation tube. Equipment maintenance is generally not allowed for live operation. If it is necessary to carry out maintenance, the operator must wear insulated shoes with insulated gloves and must be supervised by someone else. During power failure maintenance, the main power switch must be turned off, and each capacitor bank is discharged with a discharge rod before the inspection is allowed.
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