LPBF - Laser Power Bed Fusion

Digital Process
1
Step 1: Customer Requirements
Image Placeholder
  • Gather detailed specifications such as dimensions, tolerances, material properties, and performance expectations.
  • Understand functional requirements (e.g., load-bearing capacity, thermal resistance) and environmental conditions.
  • Define compliance standards (ISO, ASTM) and certification needs for regulated industries.
2
Step 2: CAD Design
Image Placeholder
  • Develop a 3D model using CAD software (e.g. NX, SolidWorks, CATIA).
  • Incorporate design-for-additive-manufacturing (DfAM) principles: lightweight structures, lattice designs, and optimized geometries.
  • Validate the design for manufacturability and ensure it meets functional requirements
3
Step 3: CAE & CAM
Image Placeholder
  • CAE (Computer-Aided Engineering)
    • Perform simulations for stress analysis, thermal behavior, and deformation prediction.
  • CAM (Computer-Aided Manufacturing)
    • Plan tool paths, layer thickness, and scanning strategies for efficient printing.
    • Determine optimal part orientation to reduce support structures and improve surface finish.
    • Design and generate support structures for overhangs and complex geometries.
4
Step 4: Build Job Preparation
Image Placeholder
  • Slice the 3D model into layers and create machine-readable instructions (e.g., STL or OBJ files).
  • Optimize build parameters for productivity and detail.
Physical Process
1
Step 1: Material & Machine Setup
Image Placeholder
  • Select appropriate metal powder (e.g., titanium, aluminum, Inconel) based on application.
  • Load built plate, upload build job, and initialize equipment.
  • Check powder quality: particle size distribution, flowability, and contamination levels.
  • Calibrate machine parameters: laser power, scan speed, layer thickness, and inert gas flow.
2
Step 2: Additive Manufacturing
Image Placeholder
  • Laser selectively melts powder layer by layer under controlled atmosphere (usually argon or nitrogen).
  • Monitor build using sensors for temperature, melt pool stability, and layer consistency.
  • Ensure proper recoating between layers to maintain uniform powder distribution.
3
Step 3: Depowdering
Image Placeholder
  • Remove loose powder from internal cavities and external surfaces using vacuum, brushes, air jets, or automated systems.
  • Collect and recycle unused powder after sieving and quality checks.
4
Step 4: Heat Treatment
Image Placeholder
  • Apply stress-relief annealing to reduce residual stress from rapid cooling.
  • Perform solution treatment or aging for alloys to achieve desired hardness and strength.
  • Control temperature and time precisely to avoid distortion or microstructural defects.
5
Step 5: Part Separation
Image Placeholder
  • Detach the printed part from the build plate using wire EDM, band saw, or other cutting methods.
Optional Services
1
Machining
Image Placeholder
  • Perform CNC machining for tight tolerances and critical surfaces.
  • Remove support structures and refine features that cannot be printed accurately.
2
Joining
Image Placeholder
  • Weld or braze printed components into larger assemblies.
3
Surface Finishing
Image Placeholder
  • Improve surface roughness using grinding, polishing, or blasting.
4
Coatings
Image Placeholder
  • Apply protective or functional coatings (e.g., thermal barrier, anti-corrosion, wear-resistant).
5
Quality Assurance
Image Placeholder
  • Conduct dimensional inspection using CMM or laser scanning.
  • Perform non-destructive testing (Liquid penetrant, X-ray, CT scanning).
  • Validate mechanical properties through tensile, hardness, and fatigue tests.
  • Document results for traceability and certification.
 This end-to-end process guarantees consistent quality, repeatability, and full traceability from CAD model to final part.