Magnesium alloy for precision machining precautions
Magnesium alloy for precision machining precautions
In the machining of magnesium alloy, the chips and fine powder produced are a risk of combustion or explosion.
In the process of magnesium alloy, the influencing factors that reach the flash point or combustion are as follows
2, other factors. The feeding rate or feeding capacity is too small; the pause time in the process is too long; the back corner of the tool is too small; the high cutting speed is not used; the tool and the different metal lining nested in the casting may produce spark; magnesium chips accumulates around or below the machine. 3. Precision machining cutting tools shall be kept sharp and ground out large rear and gap angles; blunt, sticky or cracked tools are not allowed.
4, under normal circumstances, try to use large feed for precision machining, avoid the use of small feed, in order to produce a large thickness of chips.
5, do not let the tool midway stop on the workpiece.
6, when using small cutting volume, use mineral oil coolant to reduce cooling.
7, if the magnesium alloy parts have steel core lining, to avoid collision with the tool spark.
8，Keep the environment neat and clean. Precision machining
Magnesium powder is easy to burn and can explode when suspended in the air. Therefore, the following precautions must be taken when grinding the magnesium alloy parts:
- There must be a special specially for magnesium alloy precision machining. The vacuum cleaner shall be thoroughly cleaned before trimming the grinding wheel.
- When grinding the surface of magnesium alloy parts washed with chromate, it may cause sparks, so be very careful not to allow dust to gather nearby.
- Grinding equipment operators shall use smooth hats, smooth gloves and smooth flame retardant clothing without pockets and cuffs. The apron or protective clothing used shall be clean and easily removed.
- 13, magnesium waste debris storage should be cleaned up in time, set Z long storage time.
- Enough yellow sand should be stored in the working area of precision machining for fire prevention.
Waste debris must be stored separately, not to the rain
Put the magnesium scrap produced by processing in a bucket and soak it into the special cutting liquid for magnesium processing. Place in the ventilated but can not see the water position, can not cover, so that the possible hydrogen naturally volatilize (hydrogen is not fully volatilize, may cause explosion).
Smoking, welding and other ignition source behaviors are strictly prohibited around.
15, D fire extinguisher.
Its material usually uses sodium chloride based powder or a passivation treated graphite based powder, its principle is to eliminate oxygen to extinguish the fire by stuffy.
16, covering agent or dry sand.
Small area of fire can be covered, its principle is also to eliminate oxygen to extinguish the fire.
17, Cast iron debris. It is also available in the absence of other good fire extinguishing materials. The main function is to reduce the temperature below the "ignition point of magnesium", rather than extinguish the fire.
Do you know what precision machining is?
What is the precision mechanical parts processing classification and what are there there?
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