ME 123 Quiz 1

Parametric Modeling

- Feature based: building blocks to a part - History based: ORDER MATTERS - Parent Child Relations - multitudes of ideas, different versions

Features

- a sketched feature that can be extruded or cut - applied feature is applied directly to model

Detail Drawing

- also called a part drawing - enough information to manufacture a part - shape info, size info, manufacturing info

Additive Manufacturing

- building up thin layers of material - CAD can be input - can use metal - organic shapes

Modeling Process

- identify and create base feature - create additional features - Edit model - production/documentation

Detailed Assembly Drawing

- information to manufacture AND assemble - inseperable assemblies: bonded together (welded, riveted)

Centerlines

- long, short long -small cross shows center -extension lines go just beyond feature it refers to

Proportion

- maintains size of features relative to one another!!!! - Is NOT measurable - does not control size of drawing

Assembly Drawing

- put parts together - how they fit together - special info for procedure

Tangent Lines

- should not be on multiview drawings

Numerical Control Machining

- subtractive process - CAD can be input - can use metal

Parameters

- they control the geometry of a part - geometric relations (or constraints) --> MAX - dimensions --> MIN

Multiviews

-See 2 dimensions in each view - Top, front, right

SolidWorks

-parametric - feature based

Hidden Lines

-used to represent features that cannot be seen in the current view - dashed lines

Pictoral

2D image that represents all 3D - show what object looks like - oblique, perspective, isometric

Scale

Controls the size of a drawing - drawing: actual

Direct Modeling

Direct manipulation of geometry by pushing, pulling, twisting - doesn't create features

Design Intent

How the model should behave when changes are made - geometric relations - placement of dimensions - use of equations - method of modeling

Title Block

MUST HAVE: - name of comany - scale - drawing title - drawing number

Sketching

Pre-drawing pre-cad - not to scale - use of proportions

Parametric Modeling Pros vs Cons

Pros: - DESIGN INTENT - make changes to sizes and configurations without restarting - can supress a feature - make many configurations aka sizes