lecture_2_-_rapid_prototyping_-_ch_33.20110120.4d38bac3682775.95829529

Lecture_2_-_rapid_prototyping_-_ch_33.20110120.4d38bac3682775.95829529

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ME 350 – Lecture 2 – Ch 33 Rapid Prototyping: ! Fundamentals of Rapid Prototyping ! Rapid Prototyping Technologies ! Applications and Benefits of Rapid Prototyping
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Announcements • Final exam – 1:30pm-4:30pm on May 13 th Rm:TBD • Office hours – Wednesday morning 10-12noon – Friday morning 10-11
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Learning Objectives What Rapid Prototyping is and why it is “rapid” What the basic types of rapid prototyping techniques are Estimate fabrication time Understand constraint and limitations of RP Where to find the RP applications
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The simplified Manufacturing Process Prototypes to visualize your idea, for functional demonstration, tests, evaluation, etc. Manufacturing
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Why Rapid Prototyping (RP) ? • Model from clay • Carve from wood • Bend wire meshing • Carve from Styrofoam – perhaps with surface reinforcement • Mill from a block of plastic or aluminum (3- or 4-axes machines)
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Additive RP Adds layers of material one at a time to build the solid part from the bottom to the top Build-up of complex 3D shapes from 2D layers Also called Layered Manufacturing (LM) or Solid Freeform Fabrication (SFF)
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Classification of RP Technologies The RP classification is based on the form of the starting material: 1. Liquid-based: monomers are photopolymers or thermoplastics deposited in layers (SLA & FDM & Objet) 2. Solid-based: solid sheets that are laminated to create the solid part (LOM) 3. Powder-based: powders that are bonded (thermally or by selective dispensing of a binder) (SLS & 3DP)
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Ford Lab RP Machines We now have 3 high resolution RP machines in the Ford Lab (MEL): 1. OBJET by Eden: photopolymer ink jet printing followed by UV light soak/harden at each layer ( www.objet.com ) 2. SLA by 3D Systems: Liquid photopolymer in a bath cured by UV laser, layer by layer ( www.3Dsystems.com ) 3. SLS by EOS: powders that are bonded thermally by a laser, layer by layer ( www.EOS.info )
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Liquid RP: Stereolithography (SLA) Part made out of a photosensitive liquid polymer selectively cured using a directed laser beam Earliest RP method demonstrated More installations than any other RP method
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SLA
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This note was uploaded on 10/03/2011 for the course ME 350 taught by Professor Staff during the Spring '08 term at University of Illinois, Urbana Champaign.

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Lecture_2_-_rapid_prototyping_-_ch_33.20110120.4d38bac3682775.95829529

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