ME 201 - Midterm(Lectures 1-8)

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Manufacturing and Prototyping Methods

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Intro to Mechanical Engineering, UW-Madison spring 24

37 Terms

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Manufacturing and Prototyping Methods

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Drill Size 60

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<p>What clamping scenario do you avoid?</p>

What clamping scenario do you avoid?

Two threaded holes create a gap

<p>Two threaded holes create a gap</p>
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What are the steps to creating a threaded hole?

Punch, Drill, Tap

<p>Punch, Drill, Tap</p>
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Through hole

hole goes through the entire object

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Blind hole

A specific depth through some of the object.

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Two Leading 3d Printing Technologies

Material Extrusion and Vat photopolymerization

<p>Material Extrusion and Vat photopolymerization</p>
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Material: ABS

Low Cost, tough, durable, withstand high temperatures

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Material: Flexible Filaments (TPE & TPU)

elasticity, stretch, and bend

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Material: PLA

easy to use, dimensional accuracy, low cost,

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Material: HIPS

lightweight material, dissolvable support for ABS

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Material: PET & PETG

easy print, smooth finish, water resistant

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Material: Nylon

tough, semi-flexible, high impact and abrasion resistance

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Material: Carbon Fiber Filled

PLA or ABS infused with Carbon fiber for strength and stiffness

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Material: ASA

ABS alternative, good for outdoors, UV, Temp, and impact resistance

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3D printing file prep steps

CAD, STL export, slice, print

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3D printing issues

Clearances, Long Bridges, Scale, Bad adhesion

<p>Clearances, Long Bridges, Scale, Bad adhesion</p>
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Materials to avoid laser cutting

Glass, Anodized Aluminum, Powder coated metal, Glazed ceramic tile, Marble

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Definition of Accurate

Spread out & True Value

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Definition of Precise

Consistent and imprecise value

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Finding Uncertainty in terms of one variable

Find the Partial Derivative in terms of one variable, all other variables are treated like constants.

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Finding Total Uncertainty

Finding all Partial Derivatives squared, add them together, find the square root.

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SI Units - Length

Meter

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SI Units - Mass

Kg - Kilograms

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SI Units - Time

s - Seconds

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SI Units - Force

N - Newtons

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SI Units - Pressure

N/m² or Pascal

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SI Units - Energy

N-m or J (Joules)

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SI Units - Power

N-m/s or W (Watts)

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SI Units - Velocity

m/s

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Types of Forces

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Force - Body Weight

W (Newtons or lbf) = Mass * gravity

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Statics: Sum of Forces

The sum of forces equation for a static object is:

ÎŁF = 0

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Statics: Sum of moments

ÎŁM = 0

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Force required for one pulley

100%

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Force required for a two pulley system

50%

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Force required for a 4 pulley system

25%

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