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Influence of Welding Method on Welding of High Frequency Longitudinal Welded Pipe Unit
Release time:
2018-12-06 13:50
Know the influence of welding mode on welding, in order to better operate and adjust the high frequency straight seam welded pipe unit, in order to achieve higher efficiency. Today, let's take a look at the influence of welding mode on high frequency longitudinal welded pipe machine.
Know the influence of welding mode on welding, in order to better operate and adjust the high frequency straight seam welded pipe unit, in order to achieve higher efficiency. Today, let's take a look at the influence of welding mode on high frequency longitudinal welded pipe machine.
There are two ways of high frequency welding: contact welding and induction welding.
Contact welding is to contact a pair of copper electrodes with both sides of the welded steel pipe. The induced current has good penetration. The two effects of high-frequency current are maximized due to the direct contact between the copper electrodes and the steel plate. Therefore, the welding efficiency of contact welding is high and the power consumption is low. It is widely used in the production of high-speed and low-precision pipes. Contact welding is generally required in the production of extremely thick steel pipes. However, there are two shortcomings in contact welding: one is that the copper electrode is in contact with the steel plate and wears quickly; the other is that due to the influence of the flatness and edge straightness of the steel plate surface, the current stability of the contact welding is poor, and the internal and external burrs of the weld are relatively high. It is generally not used when welding high-precision and thin-walled pipes.
Induction welding is to set one or more turns of induction coil outside the welded steel pipe. The effect of multi-turn is better than that of single turn, but it is difficult to manufacture and install multi-turn induction coil. The distance between the induction coil and the steel pipe surface is small and the efficiency is high, but it is easy to cause the discharge between the induction coil and the pipe. Generally, it is advisable to keep the induction coil from the steel pipe surface with a gap of 5~8mm. When using induction welding, because the induction coil is not in contact with the steel plate, there is no wear, and its induction current is relatively stable, which ensures the stability of welding. The surface quality of the steel pipe during welding is good, and the weld is smooth. When producing high-precision pipes such as API, induction welding is basically used.
Jiangsu Nanyang Machinery Manufacturing Co., Ltd. specializes in the design and manufacture of various types of high-frequency welded pipe units, stainless steel precision welded pipe units, high-precision steel-plastic, stainless steel composite welded pipe units; design and manufacture of various specifications and models of welded pipe molds-rollers, special-shaped rollers, So that the products formed a series, in the majority of domestic and foreign merchants enjoy a high reputation. Nanyang machinery, ZG series high frequency welded pipe unit, GW series cold bending forming machine unit, BG series stainless steel pipe making machine unit, FG high precision composite pipe production line, roll mold. Welcome to inquire: 0514-87736048
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