How to check whether the bolts are loose in the индукционна нагревателна пещ?

Regularly overhaul the induction heating furnace, check the bolts and nuts crimping of each part of the induction heating furnace, and tighten the contacts of the contactor relay if the contacts are loose or poorly contacted. All of them should be repaired and replaced in time. Do not avoid strong use to prevent larger accident. Perform regular maintenance, lubrication and tightening of the induction heating furnace at the specified time (for example, use anhydrous compressed air to systematically remove dust from induction coils, copper bars, electric control cabinets, etc.; lubricate all lubricating parts; tighten bolts).