Section 1: Mechanical Cutting Methods
1.1 Shear Cutting
Industrial Straight Shears:
Minimum thickness: 0.3mm
Maximum thickness: 6mm (for 5052 alloy)
Tolerance: ±0.1mm for <3mm sheets
Advantage: No heat-affected zone (HAZ)
1.2 Saw Cutting
Blade TypeTPISpeed (m/min)Best ForCarbide-tipped10-12600-900Thick plates (>10mm)Diamond-grit6-8300-500High-volume productionBi-metal14-18800-1200Thin sheets (<3mm)
Section 2: Thermal Cutting Technologies
2.1 Laser Cutting
Fiber Laser Parameters:
1kW laser: Cuts up to 8mm at 3m/min
6kW laser: Cuts 25mm at 1.2m/min
Assist gas: Nitrogen (99.99% purity)
Critical Note: Dross formation increases above 15mm thickness
2.2 Plasma Cutting
Performance Data:
Cut quality: Ra 3.2-6.3μm
Bevel angle: <3° on 10mm sheets
Cost Comparison: 40% cheaper than laser for >6mm thickness
Section 3: Specialized Techniques
3.1 Waterjet Cutting
Abrasive Waterjet Specs:
Garnet size: 80 mesh
Pressure: 60,000 PSI
Cutting speed: 100mm/min for 25mm 6061-T6
Advantage: No thermal distortion
3.2 Router Cutting
Tooling Requirements:
Single-flute carbide end mills
18,000 RPM spindle speed
Chip load: 0.1mm/tooth
Coolant: Mandatory for aluminum >3mm
Section 4: Cutting Quality Standards
Edge Quality Classification (per ISO 9013):
Class 1: Ra ≤ 25μm (Laser/Waterjet)
Class 2: Ra ≤ 50μm (Plasma)
Class 3: Ra ≤ 100μm (Shearing)
Tolerance Guidelines:
Thin sheets (<3mm): ±0.2mm
Medium (3-10mm): ±0.5mm
Thick (>10mm): ±1% of thickness
Section 5: Cost-Benefit Analysis
MethodInitial CostOperating CostBest ApplicationShearing$15k$0.5/mHigh-volume straight cutsLaser$150k$3/mPrecision thin sheetsWaterjet$200k$8/mComplex 3D shapesPlasma$50k$2/mThick plate cutting
Pro Tip: Always conduct trial cuts with actual production material to verify parameters
Material Warping
Causes:
Heat buildup during cutting
Uneven clamping pressure
Residual stresses in material
Solutions:
Increase coolant flow by 30%
Use vacuum clamping system
Anneal material before cutting
Problem 3: Poor Edge Quality
Causes:
Vibration during cutting
Incorrect tool path strategy
Chatter marks from unstable setup
Solutions:
Use vibration-dampening tool holders
Implement trochoidal milling paths
Increase workpiece support points
Problem 4: Aluminum Buildup on Tools
Causes:
Excessive friction heat
Insufficient lubrication
Incorrect chip evacuation
Solutions:
Apply PTFE-based lubricant
Increase air blast pressure
Use tools with polished flutes
Section 4: Quality Control Metrics
Dimensional Tolerance:
Laser/Waterjet: ±0.1mm
Plasma: ±0.3mm
Shearing: ±0.2mm
Surface Finish:
Ra ≤ 3.2μm (Laser)
Ra ≤ 6.3μm (Waterjet)
Ra ≤ 12.5μm (Plasma)
Angular Deviation:
≤0.5° for precision cuts
≤1.5° for standard cuts
