Chapter 9 Advanced Assembly Modeling Techniques

After completing this chapter, you will be able to perform the following: –Create sketch blocks –Create design view representations –Create flexible assemblies –Create positional representations –Create overlay drawing views –Create an assembly substitution –Detect contact in assemblies –Mirror an assembly Chapter 9 - Objectives

After completing this chapter, you will be able to perform the following: –Copy an assembly –Create assembly work features –Create assembly features –Create Skeletal Models –Use the Frame Generator –Locate commands related to the Content Center and Design Accelerator Chapter 9 – Objectives - Continued

Sketch Blocks What are sketch blocks –Capture design intent –2D sketch geometry –Add sketch constraint

Sketch Blocks Create sketch blocks 1.Created 2D sketch 2.Click Sketch Tab > Layout Panel > Create Block 3.Select geometry 4.Select an insertion point 5.Enter a block name 6.Sketch block created in Block folder

Sketch Blocks Place sketch blocks 1.From browser place sketch block 2.Add sketch constraints 3.If under constrained drag sketch blocks

Sketch Blocks Nested sketch blocks 1.Nest blocks to create a subassembly 2.Make flexible to allow open degrees of freedom to move 3.Export to parts or assembly files Make Part command Make Component command

Design View Representations Save configurations that show the assembly in different states, stores the following –Component visibility (visible or not visible) –Component selection status (enabled or not enabled) –Color settings and style characteristics applied in the assembly –Zoom magnification –Viewing angle

Create New Design View Representation Make Active Rename Lock Public vs. Private Design Views Design View Representations

New Design View Representation Make Active – check mark Lock – view changes are not reflected in locked Design View Representation Design View Representations

Drawings From Design View Representations Select Representation from list Associative – Yes / No Design View Representations

Flexible Assemblies Set Flexible property to a subassembly to allow movement independent from other occurrences of the subassembly

Flexible Assemblies Right-click on the subassembly in browser or graphics window and click Flexible from the menu

Positional Representations Create a motion study of an assembly model –Based on positional representation

Create Base Views based on Positional Representation Positional Representations

Creating Overlay Views Overlay views document positional representations of an assembly in a single view.

Exercise 9-1 Positional Representations

Levels of Detail Representations Improve capacity and performance in modeling and drawing environments –Suppress components –Right-click on component Browser Graphics Window

Levels of Detail Representations In assembly file –Expand Representations folder –Select required Level of Detail Open existing assembly –Click Options –Select required Level of Detail

Levels of Detail Representations Creating a drawing view of an assembly select a Level of Detail Representation to be used from the drawing view dialog box.

Assembly Substitution - Level of Detail Representation Remove detail from a part or an assembly –Derive Assembly –Select Part File

Assembly Substitution - Level of Detail Representation Derive Assembly –Create a New Substitute with the Derive Assembly option –Derive a Subassembly with desired options

Assembly Substitution - Level of Detail Representation Select Part File –Create a part with same orientation –Create a New Substitute with the Select Part File option

Create a Substitution - Level of Detail Representation - Shrinkwrap Simplify an assembly –Remove detail –Protect intelectual property –New file

Create a Substitution - Level of Detail Representation - Shrinkwrap Simplify an assembly –Existing part

Contact Detection Solver Determines how assembled components behave when a mechanical motion is applied Document Settings - Activate Contact Solver Properties dialog box

Contact Detection Solver Add components to set –Browser –Graphics Window Under constrained components

Contact Detection Solver Driven constraint –Contact will drive under constrained components that are in the Contact Set

Mirroring Components in an Assembly Mirror assembly components or an entire assembly in the current design file In an assembly click the Mirror Components tool

Select a plane to mirror components about Mirroring Components in an Assembly

Select components to mirror and select operation for each component Mirroring Components in an Assembly

More area of the dialog box –Reuse Standard Content and Factory Parts –Preview Components Mirrored Reuse Standard Content Mirroring Components in an Assembly

File Names –Prefix –Suffix –Naming Scheme Mirroring Components in an Assembly

Copying Components in an Assembly Copy assembly components or an entire assembly in the current design file –Copy Components command –Select components in graphics screen or Browser

Select components to copy and select operation for each component Copying Components in an Assembly

File Names –Naming Scheme Prefix Suffix Copying Components in an Assembly

Exercise 9-2 Mirroring Assembly Components

Assembly Work Features Create work planes and axes between parts in an assembly by selecting edges or points on parts. These work features remain tied to each associated part and adjust accordingly as the assembly is modified

Assembly features are features that are defined in an assembly Only affect a part when the part is viewed in the context of the assembly Assembly features only remove material Assembly Work Features

In an assembly sketch on a part’s: –Face –A part’s work plane –An assembly work plane Assembly Work Features

Assembly Feature Tools Assembly features exist only at the assembly level The assembly features do not affect the individual part files

Assembly Feature Removing and Adding Participants

Exercise 9-3 Creating Assembly Features

Skeletal Modeling Source –.IPT file Create a new IPT into an Assembly –Derive Component –Create geometry based on derive part

Exercise 9-4 Creating a Skeletal Model

Frame Generator Create frame structures –Skeleton part (modeling)

Frame Generator Steps to create frame 1.Create skeleton part that consists of a single sketch 2.Place members using the edges of the skeleton part 3.Members inserted from the frame generator 4.Add end treatments; miters and had holes etc.

Exercise 9-5 Using the Frame Generator

Content Center Library of standard components Place components while in an assembly

Content Center Publish feature to Content Center Publish components to Content Center

Design Accelerator Create complex parts and features based on engineering data such as ratio, torque, power, and material properties. The Design Accelerator consists of: –Component generators –Mechanical calculators –Engineer’s Handbook

Applying Your Skills Skill Exercise 9-1

Checking Your Skills 1.True_ False_ A Design View Representation can control the display style, such as shaded or wireframe, of an assembly model. 2.Which of the following are types of design view representations? a.Dynamic b.Public c.Private d.Static 3.What is the purpose of a positional representation? 4.When a new positional representation is added to the browser, how many are created by default? a.1 b.2 c.3 d.4 5.When would you want to make an assembly have the Flexible property? Continued….

Checking Your Skills - continued 6.True_ False_ Assemblies can only be made flexible when used in another assembly as a subassembly. 7.When mirroring an assembly component, which icon would you use to determine that the component is being mirrored? 8.True_ False_ Creating features in the context of an assembly will update the individual parts that make up the assembly automatically.