The way to Machine Magnesium?
De BISAWiki
Magnesium is used in manufacturing portable computers structures, movie cameras, digital cameras, PDAs and other consumer electronics services and products due to its high strength to weight ratio. When magnesium is alloyed with aluminum, the resultant product is very gentle and strong, and easily machinable.
The key concern in machining magnesium metal is the computers to buy online danger of fire ignition when dry cutting. Fire may occur when the melting point of the alloy (400-600 degrees Celsius) is realized during machining. The fine dust and small chips produced all through cutting can also be highly flammable and cause a critical fire risk if not correctly treated.
There are many things to see when machining magnesium:
Firstly, make use of a lower cutting speed when comparing to cutting metal. The workpiece temperature increases with the escalation in reducing speed and also smaller undeformed chip thickness. In other words, the more expensive the chips and the slower the machining speed, the lower the temperature is likely to be. Due to this reason, some organizations have altered woodworking tools for machining magnesium in order to obtain greater chips and lower fire hazard.The cutting tools used should have aid and clearance angles that are sufficiently large to avoid unnecessary cutting tool-workpiece friction, ergo lowering the heat generated through the cutting process.
Second, keep the machining center clean. Washing the machining centers regularly and storing the magnesium chips precisely are essential areas of machining magnesium. Keep a box of cast iron chips close by when machining magnesium, If fire occurs, smother the fire using the cast iron chips.
Additionally, if coolants are necessary for high speed machining, do not use water-based lubricants. As an alternative use a light mineral oil, or perhaps a water-soluble cutting fluid such as Castrol Hysol MG specially-formulated for machining magnesium. Some businesses in Japan use semi-dry machining using a misting system.
The next point would be to observe the temperature throughout machining. Experiments were carried out using thermocouples mounted into the workpiece to check the workpiece temperature during machine. Dry cutting of magnesium alloy thin walls was accomplished using cutting speed of 440m/min for roughing and 628m/min for fine finishing.
Despite the fire hazards, as competition from overseas low-cost manufacturing bases intensifies, and magnesium becomes increasingly found in electronics products, most machining job stores may well discover machining of magnesium a distinct segment worth pursuing.
