Modern CNC machines involve high spindle speeds and fast material removal rates which generate a lot of heat. This heat is directly added to the cutting fluid/coolant associated during the process. The high temperature is not advisable as it can cause the following problems.
Rejected /scrapped components
Reduced tool life
Coolant wastage due to increased evaporation
Greater machine component wear
Reduced coolant life
Advance Cooling Coolant Chillers are used to maintain precise coolant temperature by rapidly rejecting the heat which added during the machining process. The chillers are used to operate with water as well oil based coolant fluids. They are available in the following configurations:
Stand Alone Type
Standalone type chillers consists of an inbuilt pump ,which when energized it draws fluid from the remote coolant tank and pumps it through the evaporator in the chiller and back to the tank. The temperature controller senses the temperature of the fluid entering the chiller and controls the refrigeration effect of the chiller thus ensuring the desired fluid temperature in the tank. The cooler should be installed as near as possible to the tank
Dip in / Submersible type
Dip in Type Chillers are designed to be mounted on top of a tank to cool the fluid that is passing through it. It has an inbuilt stainless steel immersion coil type evaporator which is submerged into the fluid in the tank. An optional small agitation pump can be provided which can continuously moves the fluid around the evaporator coils ensuring uniform heat transfer. The temperature controller senses the temperature of the fluid in the tank and controls the refrigeration effect of the chiller thus ensuring the desired fluid temperature in the tank
DIP IN Chillers are very popular as they save on valuable floor space and are ideal for installation on tanks where the coolant is filled with containments like chips. Muck etc,. The evaporator coils can be periodically cleaned by simply lifting the chiller from the tank.