Diathermy induction furnace Instructions and precautions

The diathermic furnace inductor, also known as the through-type inductor, has a length and a short length depending on the length of the heated workpiece and the diameter of the workpiece. In general, however, the diathermy sensor is generally relatively long (referring to heating the axial direction of the workpiece), the purpose of which is to ensure the heating temperature and the temperature difference of the core watch while the workpiece is not constant.
1. There are basically two types of lining assembly for the heat permeable inductor. One is the knotted furnace lining, and the other is the assembled lining.
1. Whether it is knotted furnace lining or assembled furnace lining, it will change when working at high temperature for a long time (mainly thermal expansion and contraction and oxidation). If used improperly, there will also be heating material collision and extrusion lining. Therefore, the use of the lining has a certain period of time. This depends mainly on the situation during use.
1. Once the lining is cracked, if it is a knotted lining, the crack must be filled in time with the knot when the crack does not exceed 2mm. If the crack exceeds 2mm, the lining must be re-knotted; if it is assembled lining, it must be replaced. Therefore, the user must take the necessary measures in the actual situation, do not act rashly, cause unnecessary consequences, burn the sensor.
1. During the heating process, the sensor will accumulate a lot of oxide scale which will fall off due to heating of the workpiece. If the lining is damaged, or there are cracks, cracks, if not cleaned in time, one is easy to fire, causing over-current protection of the intermediate frequency power supply, and second, it is easy to break through the inductor coil and cause short circuit between the inductors. Therefore, the scale in the inductor furnace is cleaned at least once per shift (8 hours).
The diathermy inductor coil is usually water-passed, and the heat it generates is mainly carried away with water. Therefore, there must be sufficient water flow and water pressure to ensure that the copper tube of the sensor flows through the necessary amount of water. Therefore, the working pressure of the cooling water should be no less than 0.2~0.3Mpa, the inlet water temperature is less than 35°C, and the outlet water temperature is less than 55°C. If the water pressure is not enough, the inductor coil will be vaporized and heated. If not found in time, the copper tube will rupture and the water will overflow. The sensor is in high temperature operation. At this time, it is very likely that an explosion will occur. Therefore, sensor water cooling is extremely important.
The new sensor just put into production, after the power is turned on, it must be baked at low power (generally around 30KW), and the workpiece is heated in the induction furnace for about 2 hours. The reason is that the manufacturer must pass water in the sensor during the debugging process. After the debugging, there must be residual water in the copper tube of the inductor. Especially in the winter, it is possible to form very thin ice. Therefore, the sensor is definitely tidal. In order to ensure the service life of the lining, the newly put into the production of the inductor must be low-power baking, and then start production at high power after 2 hours.
1. The water-cooled guide inside the sensor is actually the moving track that heats the workpiece, and it always works at high temperatures. If the water supply is insufficient or the water pressure is insufficient, gasification, redness, deformation, and heating of the workpiece will not pass through the sensor. Therefore, water cooling of water-cooled guide rails is also extremely important.
1. The water-cooled guide rail is worn during use. Generally, the wall thickness of the water-cooled guide rail is 2 mm. Therefore, the use of water-cooled guide rails has a certain period of time. If it is too worn, it must be replaced. Otherwise, if water leaks, it will cause the lining to be quenched, which directly affects the use of the lining.
1. Dry rails (not water), if worn, deformed, must be replaced, and the lining is prohibited as a guide for heating the workpiece.
In short, the heat-transfer sensor must also be inspected while viewing during use. If problems are found, they should be dealt with in a timely manner. Only in this way can the sensor be used normally and will not affect production.

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