During The Machining Of Small Batches Of Magnesium Alloy Parts, Magnesium Powder Can Easily Cause Explosions!

The Magnesium Alloy With A Density Of Is 36% Lighter Than Aluminum Alloy, 73% Lighter Than Zinc Alloy, 77% Lighter Than Steel. It Is Recognized As The Structural Metal Material With The Smallest Mass. The Machining Of Small Batches Of Magnesium Alloy Parts Can Be Carried Out On Small Manually Operated Machine Tools; When Machining Magnesium Alloy Parts In Large Quantities With High Efficiency, It Will Be More Economical For Huiwen To Use Dedicated Large-Scale Automated Machining Centers  Computer Numerical Control Machine Tools. Compared With Those Metal Materials With Poor Machinability, Magnesium Alloys With Good Cutting Performance Have Very Outstanding Advantages. For Magnesium Alloys, Strong Cutting Can Be Performed At High Cutting Speeds Large Feed Rates, So That The Number Of Machining Hours Can Be Reduced. Therefore, When Completing The Same Work Task, If Magnesium Alloy Is Used As The Raw Material, The Number Of Processing Equipment Can Be Reduced, Infrastructure Investment Can Be Saved, The Floor Space Can Be Reduced, Labor Costs Management Expenses Can Be Reduced.

Cutting Power Consumption Of Magnesium Alloy

1. Unsafe Factors In The Machining Process

During The Machining Of Magnesium Alloys, The Chips Fine Powders Produced Have The Risk Of Combustion Explosion.

In The Processing Of Magnesium Alloys, The Factors That Affect The Temperature Of The Chips To The Flash Point Combustion Are As Follows:

A. The Relationship Between Processing Speed Cutting Rate. The Generation Of Cutting Heat Increases In Proportion To The Cutting Speed. The Higher The Relative Temperature, The Greater The Possibility Of Fire.

B. Other Factors: The Feed Rate Cutting Depth Is Too Low; The Dwell Time During Machining Is Too Long; The Back Angle Chip Space Of The Tool Are Too Small; A High Cutting Speed Is Used Without The Use Of Cutting Fluid; Sparks May Be Generated When The Tool Collides With The Dissimilar Metal Core Liner Embedded In The Casting; Magnesium Chips Accumulate Around Under The Machine Tool, Etc.

2. Safe Operating Procedures For Machining

A. Cutting Tools Should Be Kept Sharp Ground To Have Larger Back Angles Clearance Angles; Blunt, Chip-Stained Broken Tools Are Allowed.

B. In General, Try To Use A Large Feed Rate For Processing Avoid Using A Small Feed Rate To Produce Thicker Chips.

C. Do Let The Tool Stop On The Workpiece.

D. When Using Small Cutting Amounts, Use Mineral Oil Coolant To Reduce Temperature Drop.

E. If There Is A Steel Core Lining In The Magnesium Alloy Parts, Avoid Collision With The Cutting Tool To Generate Sparks.

F. Keep The Environment Tidy Clean.

G. Smoking, Lighting Fires, Welding, Any Other Flammable Operations Are Strictly Prohibited In The Processing Work Area.

3. Safety Issues In Grinding: Magnesium Powder Is Very Flammable Can Cause Explosions When Suspended In The Air. Therefore, The Following Precautions Must Be Taken When Grinding Magnesium Alloy Parts:

A. A Grinding Machine Specially Used For Magnesium Alloy Parts Processing Is Required . Before Dressing The Grinding Wheel, The Vacuum Cleaner Should Be Thoroughly Cleaned.

B. When Reworking Grinding The Surface Of Magnesium Alloy Parts That Have Been Etched With Chromate, Sparks May Be Caused, So Be Especially Careful Never Allow Dust To Accumulate Nearby.

C. Grinding Equipment Operators Should Use Smooth Hats, Smooth Gloves Smooth Flame-Retardant Clothing Without Pockets Cuffs. The Aprons Protective Clothing Used Should Be Clean, Dust-Free Easy To Take Off.

D. Magnesium Waste Should Be Cleaned Up In Time A Maximum Storage Period Should Be Set.

E. Sufficient Yellow Sand Should Be Stored In The Work Area For Fire Prevention Extinguishing Purposes.

4. Magnesium Chips Fine Powder Processing Waste Chips Must Be Stored Separately Exposed To Rain . Put The Magnesium Chips Produced By Processing In A Barrel Soak Them In Special Cutting Fluid For Magnesium Processing. Place It In A Ventilated Place But Exposed To Rain Water. Do Cover It To Allow The Hydrogen That May Be Produced To Evaporate Naturally (Hydrogen Cannot Be Fully Evaporated May Cause An Explosion). Smoking, Welding Any Other Ignition-Related Activities Are Strictly Prohibited In The Surrounding Area.

5. Fire Extinguishing Of Magnesium Chips

A. Class D Fire Extinguisher. Its Material Usually Uses Sodium Chloride-Based Powder A Passivated Graphite-Based Powder. Its Principle Is To Suffocate The Fire By Excluding Oxygen.

B. Covering Agent Dry Sand: It Can Be Used To Cover A Small Area Of Fire. Its Principle Is Also To Suffocate The Fire By Excluding Oxygen.

C. Cast Iron Chips. It Can Also Be Used When There Are No Other Good Fire Extinguishing Materials. Its Main Function Is To Reduce The Temperature Below The Ignition Point Of Magnesium, Rather Than Smothering The Fire.