Aluminum rapid prototyping

Aluminum alloy has the characteristics of low density, good mechanical properties, good machining properties, non-toxic, easy to recycle, electrical conductivity, heat transfer and corrosion resistance.

Aluminum alloy pendant machining

Aluminum alloy

Introduction

An alloy based on aluminum with a certain amount of other alloying elements is one of the light metal materials. In addition to the general characteristics of aluminum, aluminum alloys have some specific characteristics of alloys due to the different types and quantities of added alloying elements.

The density of aluminum alloy is 2.63~2.85g/cm, high strength (σb is 110~650MPa), specific strength is close to high alloy steel, specific stiffness is higher than steel, good casting performance and plastic machining performance, good electrical conductivity , Thermal conductivity, good corrosion resistance and weldability, can be used as structural materials, has a wide range of applications in aerospace, aviation, transportation, construction, electromechanical, light and daily necessities.

Aluminum alloy characteristics



6061-T6 Aluminum
Yield strength Elongation at break Hardness Density Maximum temperature
35,000 psi 12.50% B95 2.768 g/㎤ 1080° F

7075-T6 Aluminum
Yield strength Elongation at break Hardness Density Maximum temperature
68,000 psi 11% B86 2.768 g/㎤ 380° F

5052 Aluminum
Yield strength Elongation at break Hardness Density Maximum temperature
23,000 psi 8% B60 2.768 g/㎤ 300° F

6063 Aluminum
Yield strength Elongation at break Hardness Density Maximum temperature
16,900 psi 11% B55 2.768 g/㎤ 212° F

MIC6 Aluminum
Yield strength Elongation at break Hardness Density Maximum temperature
23,900 psi 3% B65 2.768 g/㎤ 1200° F

Surface treatment of die casting


Smooth

The A-level finish adopts a machining method that uses mechanical, chemical or electrochemical effects to reduce the surface roughness of the workpiece to obtain a bright and smooth surface.

SPI standard:

A1 A2 A3

Semi-gloss

Grade B finishes use coarse sandpaper to produce parts that are rougher than Grade A parts. Custom molded plastic parts that have undergone B-level finishing have a matte surface texture.

SPI standard:

B1 B2 B3

Matte finish

Grade C finishes use coarse sandstone to produce a rough, uneven surface. The C-level finished injection molded parts have a matte surface texture.

SPI standard:

C1 C2 C3

Textured

Class D finishes use gravel and dry glass beads or oxides to produce a very rough textured finish. Depending on the type of material used, the product can have a satin or matte finish.

SPI standard:

D1 D2 D3

3D printing post-machining


  • FDM

    Standard (no additional post-machining)

  • All surfaces must have a consistent visual appearance
  • Remove support structure
  • Remove excess support/building materials
  • All parts are printed with 3 outlines/peripheral shells or 1.2mm wall thickness
  • The minimum thickness of the top and bottom layers is 0.6 mm (6 layers, 100 microns)
  • SLA

    Standard (no additional post-machining)

  • The dimensional accuracy is ± 0.5%, and the lower limit is ± 0.15 mm
  • All support materials have been removed, and the support nibs are polished smooth
  • Excess resin must be drained from the hollow part.
  • For transparent resin, use polishing oil
  • Parts are fully cured to the material manufacturer’s specifications before shipment.
  • SLS/MJF

    Standard (no additional post-machining)

  • Remove all unmelted powder by bead spray (first time) and air spray (second time)
  • The air pressure range is 2-5 bar or 29-72.5 psi
  • Glass beads 70-110 microns in diameter
  • No additional post-machining required

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