Daily maintenance of medium frequency induction furnace (part one)

The daily maintenance of the medium frequency induction furnace is very important. It can detect various hidden dangers in time, avoid major accidents, extend the service life of the medium frequency induction furnace, ensure safe production, improve the quality of castings, and reduce costs. The main work we need to do is to regularly record the relevant electrical parameters of the medium frequency induction furnace, the cooling water temperature, and the temperature of the key parts of the furnace body (furnace bottom, furnace side, induction coil housing, copper bar, etc.), so that it can be done at any time Only by monitoring the usage of the medium frequency induction furnace can the reliable operation of the medium frequency induction furnace be ensured.

1. Regularly remove the dust in the power cabinet of the medium frequency induction furnace, especially the outside of the thyristor die. It should be wiped clean with alcohol. The frequency conversion device of the medium frequency induction furnace in operation generally has a dedicated computer room, but the actual operating environment is not ideal . In the smelting and forging process, the dust is very large and vibrates strongly; in the medium frequency induction furnace diathermy quenching process, the device is often close to the pickling and phosphating operation equipment, and there are more corrosive gases, which will damage the components of the device and reduce The insulation strength of the device, when there is a lot of dust, the surface discharge phenomenon of the component will often occur, so it is necessary to pay attention to frequent cleaning work to prevent failure.
2. Observe the water pressure gauge and water temperature gauge of the medium frequency induction furnace every day and check the aging degree of the water delivery hose; regularly check the flow of each cooling water branch to ensure that the pipeline is not blocked and the pipe joints do not leak, especially in the power cabinet of the medium frequency induction furnace No water leakage is allowed in the cooling water joints. If you find water leakage, you can tighten the water pipe joint clamp or replace with a new clamp; regularly check the water tower spray pool, expansion tank, power supply cabinet, and water tank. , And replenish water in time; always use the standby pump for the medium frequency induction furnace and use the standby pump every 3 to 5 days to ensure that the standby pump is absolutely reliable. When the cooling water quality is poor, the key components of the medium frequency induction furnace need to be replaced or cleaned regularly, such as the water cooling jacket of the cooling control cabinet. If there is a lot of scale, the cooling effect is not good, and the thyristor is easily damaged.
3. Regularly check whether the water pipe joints of the medium frequency induction furnace are firmly tied. When using tap water well water as the cooling water source of the device, it is easy to accumulate scale and affect the cooling effect. When the plastic water pipe ages and cracks, the medium frequency furnace device should be replaced in time when it is running in summer The use of tap water well water cooling is often prone to condensation, and the circulating water system should be considered. When the condensation is severe, the medium frequency induction furnace should be stopped.
4. Regularly overhaul the medium frequency induction furnace, check the bolts and nuts crimping of each part of the medium frequency induction furnace, and tighten the contacts of the contactor relay if the contacts are loose or poorly contacted. They should be repaired and replaced in time. Do not avoid strong use to prevent cause Bigger accident. Regular maintenance, lubrication and tightening of the medium frequency induction furnace according to the specified time (for example: use anhydrous compressed air to systematically remove dust from the induction coil, copper bar, electric control cabinet, etc.; lubricate the lubrication parts; tighten the bolts).