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- 3d Parametric Cad Software
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Chapter 3 Introduction to CAD Section 1 Introduction to Drafting
Zip-Bit’s in-house 3D Modeling services include taking full 3D Scans of your object, turning those scans into surface then solid models on to fully developed parametric feature trees, exporting the completed file in the clients required CAD file formats, which allow for easy modifications / redesigns. In many scenarios, SolidWorks and Inventor actually compare fairly evenly to each other. However, I believe that where SolidWorks really stands out is the fact that it was designed from the start as a 3D parametric solid modeling application whereas Inventor comes from a company that has a decade's worth of background in 2D CAD. FreeCAD has functional-parametric modeling tools with modular software architecture. This makes it easier to provide additional features without changing the underlying system. This 3D modeling software incorporates numerous tools for creating 2D templates or extracting project details from a 3D model to create 2D drawings. Solid modeling cad ( solidworks / catia / nx / creo / pro-e / inventor / fusion 360 / solid edge / freecad etc. ) deals with adding dimensions and constraints to a 3d model. It is ” parametric ” meaning you can define the shape and later edit. This is very essential for engineers since design changes are always happening.
Objectives • Explain computer-aided drafting and design. • Identify common applications for CAD in different areas of drafting. • List the components of a typical CAD workstation. • Identify features of CAD software and how they should be evaluated when selecting a program. • Explain the advantages of specific CAD applications. © Goodheart-Willcox Co. , Inc. 3 Permission granted to reproduce for educational use only.
What Is CAD? • Tool used to plan and design parts. • Automates symbol creation and object duplication. • Incorporates hardware and software. • Requires knowledge of drafting principles and practices. © Goodheart-Willcox Co. , Inc. 4 Permission granted to reproduce for educational use only.
Why Use CAD? • • Productivity Flexibility Uniformity Ease of scaling (Edge. CAM/Pathtrace) © Goodheart-Willcox Co. , Inc. 5 Permission granted to reproduce for educational use only.
CAD Productivity Benefits • Significant time and money savings over manual drafting. • Increased drawing quality. • Reduced number of revisions. • Symbol library applications. • Schedule generation and analysis tools. © Goodheart-Willcox Co. , Inc. 6 Permission granted to reproduce for educational use only.
Symbol Library © Goodheart-Willcox Co. , Inc. 7 Permission granted to reproduce for educational use only.
CAD Flexibility Benefits • Plotting at a variety of scales. • Presentation and media options. • Data sharing. © Goodheart-Willcox Co. , Inc. 8 Permission granted to reproduce for educational use only.
CAD Uniformity Benefits • Accurate adherence to standards. • Consistent symbol generation. • Ensured line quality. © Goodheart-Willcox Co. , Inc. 9 Permission granted to reproduce for educational use only.
CAD Scaling Benefits • Objects typically drawn at full size. • Drawing plotted at specified scale. • Drafting time and potential for errors minimized. © Goodheart-Willcox Co. , Inc. 10 Permission granted to reproduce for educational use only.
Mechanical CAD Applications • Automatic schedule generation. • Rendering capability. • Animation functions. © Goodheart-Willcox Co. , Inc. 11 Permission granted to reproduce for educational use only.
Part Schedule Production © Goodheart-Willcox Co. , Inc. 12 Permission granted to reproduce for educational use only.
CAD Workstation • Used together with CAD software. • Often connected to other devices in network. • May be connected to mainframe. © Goodheart-Willcox Co. , Inc. 13 Permission granted to reproduce for educational use only.
CAD Workstation (Cont. ) © Goodheart-Willcox Co. , Inc. 14 Permission granted to reproduce for educational use only.
Computer Components • • © Goodheart-Willcox Co. , Inc. Central processing unit (CPU) Output device Input device Storage devices 15 Permission granted to reproduce for educational use only.
Storage Devices • Used to save data for later use. • • © Goodheart-Willcox Co. , Inc. Computer hard drive CD-RW drive DVD drive 16 Permission granted to reproduce for educational use only.
Display Device • Typically a CRT or LCD monitor. • Size defines screen area. • Video card should meet needs of application. © Goodheart-Willcox Co. , Inc. 17 Permission granted to reproduce for educational use only.
Input Devices • • • © Goodheart-Willcox Co. , Inc. Keyboard Mouse Trackball Digitizer puck Light pens 18 Permission granted to reproduce for educational use only.
Output Devices • • © Goodheart-Willcox Co. , Inc. Pen plotter Laser printer Inkjet printers Inkjet plotters 19 Permission granted to reproduce for educational use only.
Pen Plotter • • • © Goodheart-Willcox Co. , Inc. Traditional device for CAD work. Generates vector drawings. Used for large-format output. Produces very accurate line quality. Disadvantage is slow operation. 20 Permission granted to reproduce for educational use only.
Inkjet Printers and Plotters • Generate raster drawings. • Used for high-quality color renderings. • Potential disadvantages are slow operation and cost. (Design. Jet Division, Hewlett-Packard) © Goodheart-Willcox Co. , Inc. 21 Permission granted to reproduce for educational use only.
CAD Packages • Types and costs vary based on features provided. • Lower-end systems used for 2 D drawing. • More advanced software available for 3 D work. © Goodheart-Willcox Co. , Inc. 22 Permission granted to reproduce for educational use only.
Selecting a CAD Package • Consider product features and specific needs. • • • © Goodheart-Willcox Co. , Inc. Ease of use Hardware requirements Product support Warranty coverage Specific tools in software Cost 23 Permission granted to reproduce for educational use only.
Types of CAD Packages • General purpose CAD packages • Advanced mechanical drafting and modeling CAD packages • AEC CAD packages © Goodheart-Willcox Co. , Inc. 24 Permission granted to reproduce for educational use only.
General Purpose CAD Features • • • © Goodheart-Willcox Co. , Inc. Functions for drawing objects Automated dimensioning Hatch pattern generation Text functions and font types Editing functions 25 Permission granted to reproduce for educational use only.
CAD Hatch Patterns © Goodheart-Willcox Co. , Inc. 26 Permission granted to reproduce for educational use only.
General Purpose CAD Features • • • © Goodheart-Willcox Co. , Inc. Layers Object display colors Linetype definitions Coordinate entry methods Methods for entering commands 27 Permission granted to reproduce for educational use only.
General Purpose CAD Features (Cont. ) • • • © Goodheart-Willcox Co. , Inc. Drawing unit formats Display controls Drawing aids Printing or plotting functions Customization options Data exchange methods 28 Permission granted to reproduce for educational use only.
3 D Drawing Features • Available in more advanced programs. • Shading and rendering • Animation • Mass property analysis © Goodheart-Willcox Co. , Inc. 29 Permission granted to reproduce for educational use only.
Types of 3 D Models • Surface model • Solid model © Goodheart-Willcox Co. , Inc. 30 Permission granted to reproduce for educational use only.
Advanced Mechanical Drafting and Modeling CAD Packages • Designed for advanced engineering applications. • Provide additional 3 D modeling features. • Commonly used in automated manufacturing. © Goodheart-Willcox Co. , Inc. 31 Permission granted to reproduce for educational use only.
Advanced Mechanical Drafting and Modeling Features • • • © Goodheart-Willcox Co. , Inc. Solid modeling tools Parametric modeling tools Automatic view generation Mechanical symbol libraries CAD/CAM functionality 32 Permission granted to reproduce for educational use only.
Solid Modeling • • • © Goodheart-Willcox Co. , Inc. Building from primitives. Revolving 2 D profiles. Extruding 2 D profiles. Removing material. Sweep operations. Loft operations. 33 Permission granted to reproduce for educational use only.
Extruded Solid Model © Goodheart-Willcox Co. , Inc. 34 Permission granted to reproduce for educational use only.
Revolved Solid Model © Goodheart-Willcox Co. , Inc. 35 Permission granted to reproduce for educational use only.
Swept Solid Model (Anthony J. Panozzo) © Goodheart-Willcox Co. , Inc. 36 Permission granted to reproduce for educational use only.
Parametric Modeling • Model defined based on adjustable parameters. • Parts added must conform to existing construction. • Model may include constraints. • Operation verified during process. © Goodheart-Willcox Co. , Inc. 37 Permission granted to reproduce for educational use only.
Parametric Modeling Program (Image Courtesy of Solid. Works Corporation) © Goodheart-Willcox Co. , Inc. 38 Permission granted to reproduce for educational use only.
Automatic View Generation • Fills need to provide 2 D drawings to manufacturing personnel. • Orthographic views most common. • Section, auxiliary, and pictorial views may also be generated. © Goodheart-Willcox Co. , Inc. 39 Permission granted to reproduce for educational use only.
Computer-Aided Manufacturing • Uses CAD data in computer numerical control (CNC) operations. • Typically used by machining centers. • Tooling movement and speed controlled automatically. • Design data verified before machining. © Goodheart-Willcox Co. , Inc. 40 Permission granted to reproduce for educational use only.
CAD/CAM Software Program (Edge. CAM/Pathtrace) © Goodheart-Willcox Co. , Inc. 41 Permission granted to reproduce for educational use only.
AEC CAD Packages • Designed for specific AEC fields. • Special features added to general CAD tools. • Used in both 2 D and 3 D drawing. © Goodheart-Willcox Co. , Inc. 42 Permission granted to reproduce for educational use only.
AEC CAD Package Features • • • © Goodheart-Willcox Co. , Inc. Automatic schedule generation Space diagram creation Stair generation Hatch pattern generation Wall creation Symbol libraries 43 Permission granted to reproduce for educational use only.
Space Diagram Conversion © Goodheart-Willcox Co. , Inc. 44 Permission granted to reproduce for educational use only.
3d Parametric Cad Software
Common AEC Symbol Libraries • • • © Goodheart-Willcox Co. , Inc. Doors and windows Structural members Plumbing fixtures and fittings Electrical fixtures HVAC components Landscaping features 45 Permission granted to reproduce for educational use only.
Common AEC Symbol Libraries (Cont. ) • • © Goodheart-Willcox Co. , Inc. Furniture and appliances Title symbols Construction details Vehicles 46 Permission granted to reproduce for educational use only.
Door and Window Symbols © Goodheart-Willcox Co. , Inc. 47 Permission granted to reproduce for educational use only.
Building Information Modeling (BIM) • Form of parametric modeling. • Used in more advanced AEC CAD programs. • Data stored for each construction system in structure. • Components added alter existing structure. • Result may be called virtual building. © Goodheart-Willcox Co. , Inc. 48 Permission granted to reproduce for educational use only.
Building Information Modeling Features • Cost analysis tools • Automatic generation of plan drawings • Automatic schedule generation © Goodheart-Willcox Co. , Inc. 49 Permission granted to reproduce for educational use only.
Building Information Modeling Program (Autodesk, Inc. ) © Goodheart-Willcox Co. , Inc. 50 Permission granted to reproduce for educational use only.
Review Questions 1. A symbol _____ is a collection of standard shapes and symbols used in a particular CAD application. library © Goodheart-Willcox Co. , Inc. 51 Permission granted to reproduce for educational use only.
Review Questions 2. A computer mouse is an example of a(n) _____ device. input © Goodheart-Willcox Co. , Inc. 52 Permission granted to reproduce for educational use only.
Review Questions 3. A(n) _____ prints object lines on drawings as vectors. A. laser printer B. inkjet printer C. inkjet plotter D. pen plotter © Goodheart-Willcox Co. , Inc. 53 Permission granted to reproduce for educational use only.
Review Questions 4. Which of the following is not a typical feature found in a general purpose CAD package? A. Hatch pattern generation B. Automated dimensioning C. Editing functions D. Building information modeling (BIM) © Goodheart-Willcox Co. , Inc. 54 Permission granted to reproduce for educational use only.
Review Questions 5. _____ are similar to transparent drawing sheets on which you can draw. A. Hatch patterns B. Layers C. Linetypes D. Drawing aids B. Layers © Goodheart-Willcox Co. , Inc. 55 Permission granted to reproduce for educational use only.
Review Questions 6. A _____ is a solid model created by extruding a profile along a path. A. sweep B. primitive C. revolution D. union A. sweep © Goodheart-Willcox Co. , Inc. 56 Permission granted to reproduce for educational use only.
Review Questions 7. Special controls called _____ are used in parametric modeling to define size and location dimensions to establish spatial relationships. constraints © Goodheart-Willcox Co. , Inc. 57 Permission granted to reproduce for educational use only.
Review Questions 8. A(n) _____ is created by extruding one or more profiles along a special type of path called a rail. loft © Goodheart-Willcox Co. , Inc. 58 Permission granted to reproduce for educational use only.
Review Questions 9. Which type of CAD program is best suited for automated manufacturing? A. Building information modeling (BIM) program B. General purpose CAD package C. CAD/CAM program D. AEC CAD package C. CAD/CAM program © Goodheart-Willcox Co. , Inc. 59 Permission granted to reproduce for educational use only.
A Practical Guide to Parametric Drawing in AutoCAD
A Practical Guide to Parametric Drawing in AutoCAD
Description
Parametric design tools aren’t just for programs like Inventor software, Revit software, or AutoCAD Civil 3D software. There is also a set of parametric drawing tools that you can use to create dynamic relationships and constraints between objects in AutoCAD software. The parametric drawing tools will revolutionize the way that you draw and edit objects in AutoCAD software. This class will introduce you to parametric drawing in AutoCAD software by using both geometric and dimensional constraints to add intelligence to your objects. You will learn how using Auto Constrain and Inferred Constraints can help you quickly add constraints and change your process from drafting to modeling. If you’ve ever wanted geometry in your drawing to update based on changes that you’ve made to other objects, or if you’ve wanted to type a new value into a dimension and have the object update based on this new value, this class is for you. This session features AutoCAD. AIA Approved
Key Learnings
- Learn how to create geometric relationships between objects by adding constraints
- Understand dimensional constraints
- Learn how to identify and edit constrained objects
- Learn how to use inferred constraints to have AutoCAD automatically define constraints for you
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1:47:00youtube.comArbor Press || Autodesk Inventor TutorialFeb 21, 20219.4K Views
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