Showing posts with label AUTO CAD. Show all posts
Showing posts with label AUTO CAD. Show all posts

Monday, November 22, 2010

Tutorial and Study Auto CAD Mechanical Specific Tool Design

Standards-Based Drafting and Part Libraries

1. Standard Parts, Features, and Holes
Produce accurate designs faster with standardsbased parts from the libraries in AutoCAD Mechanical, saving hours of design time. Auto CAD Mechanical contains more than 700,000 parts such as screws, nuts, washers, pins, rivets, and bushings. It also includes 100,000 predrawn features such as undercuts, keyways, and thread ends. Auto CAD Mechanical also contains more than 8,000 predrawn holes, including through, blind, and oblong holes. When users incorporate these features into a design, Auto CAD Mechanical automatically cleans up the insertion area, reducing the need for manual edits.

 2. Standards-Based Design
Multiply productivity with tools that help users deliver consistent, standards-based design documentation. Auto CAD Mechanical supports ANSI, BSI, CSN, DIN, GB, ISO, and JIS drafting environments. Using standards based drafting environments helps groups of users maintain a common form of communication.
 3. Standard Part Favorites
Customize AutoCAD Mechanical to fit your workflow. Users can now save frequently used parts as
favorites, where they can be accessed quickly for easy reuse.

 4. Part Publishing
Save time and maintain consistency across projects by enabling users to easily leverage their existing
part designs. Part publishing offers the capability to add new part families to the library.

5. Screw Connections
Automate the creation and management of screw connections with this easy-to-use graphical interface
that supplies thousands of connection options, while helping users choose the best parts for their design. Create, copy, and edit entire fastener assemblies at one time. Pick the desired type of screw, corresponding
washers, and type of nut. Appropriate sizes for nuts, washers, and holes are presented depending on the screw selected and material thickness. The hole is added to the part where specified, and the entire fastener assembly is inserted into the hole. All inserted parts are instantly captured by the bill of materials (BOM).
6. 2d Structural Steel Shapes
Create designs more quickly and accurately using predrawn geometry. Auto CAD Mechanical contains
more than 11,000 predrawn standard structural steel shapes that users can incorporate quickly into any design. These include common structural shapes such as U-shape, I-shape, T-shape, L-shape, Z-shape, rectangular tube, round tube, rectangular full beam, and rectangular round beam.

7. Annotation Symbols and Notes
Save time and increase accuracy by using standards-based mechanical symbols and notes. Auto CAD Mechanical includes drafting tools to create standards-based surface texture symbols, geometric dimensioning and tolerances, datum identifiers and targets, notes, taper and slope symbols, and weld symbols.

8. Title and Revision Blocks
Quickly generate drawings with uniform, precreated title and revision blocks. AutoCAD Mechanical includes a full set of configurable title and revision blocks in both English and metric units. Users can easily customize these blocks with company-specific information.


1. Starting Up AutoCAD LT 2009

Select the AutoCAD LT 2009 option on the Program menu or select the AutoCAD LT 2009 icon on the Desktop. Once the program is loaded into memory, the AutoCAD LT 2009 drawing screen will appear on the screen.

-Note that AutoCAD LT automatically assigns generic names, Drawing X, as new drawings are created. In our example, AutoCAD LT opened the graphics window using the default system units and assigned the drawing name Drawing1.

Drawing Units Setup
Every object we construct in a CAD system is measured in units. We should determine the value of the units within the CAD system before creating the first geometric entities.

1. In the Menu Browser, select: [Format] --> [Units]

2. In the Drawing Units dialog box, set the Length Type to Decimal. This will set the measurement to the default English units, inches.

 3. Set the Precision to two digits after the decimal point

Drawing Area Setup

Next, we will set up the Drawing Limits; setting the Drawing Limits controls the extents of the display of the grid. It also serves as a visual reference that marks the working area. It can also be used to prevent construction outside the grid limits and as a plot option that defines an area to be plotted/printed. Note that this setting does not limit the region for geometry construction.

1. In the Menu Browser, select: [Format] --> [Drawing Limits]

2. In the command prompt area, near the bottom of the AutoCAD LT drawing screen, the message “Reset Model Space Limits: Specify lower left corner or [On/Off] <0.00,0.00>:” is displayed. Press the Enter key once to accept the default coordinates <0.00,0.00>.

3. In the command prompt area, the message “Specify upper right corner <12.00,9.00>:” is displayed. Press the ENTER key again to accept the default coordinates <12.00,9.00>.

4. On your own, move the graphic cursor near the upper-right comer inside the drawing area and note that the drawing area is unchanged. (The Drawing Limits command is used to set the drawing area; but the display will not be adjusted until a display command is used.)

5. In the Menu Browser, select: [View] --> [Zoom] --> [All]

The Zoom All command will adjust the display so that all objects in the drawing are displayed to be as large as possible. If no objects are constructed, the Drawing Limits are used to adjust the current viewport.

Totorial Design Auto Cad Mechanical

Mechanical Drawing Toolbar

Create drawings more accurately with purposebuilt tools. AutoCAD Mechanical provides options beyond those in basic AutoCAD software for drawing creation, including more than 30 options for creating rectangles, arcs, and lines; specialty lines for breakout views and section lines; and mechanical centerlines and hatching additions.

 Automatic Hidden Lines

Reduce drafting effort with automatically generated hidden lines that update to reflect drawing revisions. Perform 2D hidden-line calculations based on user-defined foreground and background selections that update automatically. These selections automatically redraw geometry, reducing the tedious manual task of trimming and changing properties of lines in AutoCAD. The 2D Hide feature also warns users of potential geometrical errors and provides a graphical workflow that is easy to learn and use.

 Constraint Manager
 Design more intuitively and efficiently by defining parametric constraints instead of manually drafting part geometry. Using the constraint manager, users can easily build intelligence into their designs by incorporating dynamic constraint relationships such as parallel, tangent, and perpendicular. Once the parameters are defined, the constraint manager automatically updates geometry to maintain accurate relationships as the design changes.

 Streamlined Design Environment

AutoCAD Mechanical features a streamlined user interface. Find your favorite tools and commands faster, locate lesser-used tools more efficiently, and discover relevant new features more easily. The result is less time searching through menus and toolbars, and more time getting your work done.

Quickly customize toolbars and settings with the Workspaces toolbar, which offers a pull-down menu
where designers can easily store and access different user-interface setups. Several prebuilt workspaces
ship with the product, including the classic AutoCAD workspace as well as workspaces that make it easier to learn AutoCAD Mechanical.

Power Dimensions

Quickly change, edit, or delete dimensions, saving significant time and effort. AutoCAD Mechanical makes AutoCAD dimensions easier to use with abbreviated dialog boxes that conveniently control and expand only the variables relevant for manufacturing. With automatic dimensioning, users can create multiple dimensions with minimal input, resulting in instant groups of ordinate, parallel, or symmetric items that are appropriately
spaced. Smart dimensioning tools force overlapping dimensions to automatically space themselves appropriately while integrating tolerance and fit list information into the drawing. Inspection dimensions enable users to specify testing criteria.

Associative Detailing Tools
Dimension Stretch

Easily update designs to specific sizes and shapes simply by changing the dimension values. The geometry of a design resizes accordingly. For complex designs, use multiple selection windows to choose exactly which geometry should be changed by the dimension value.

Associative Detailing Tools
Update drawings quickly with powerful tools that enable users to edit previous operations, saving valuable design time. Easily re-edit features without having to remove and re-create the original feature. For example, resize a chamfer using the original dialog parameters by simply double-clicking the chamfer.

Power Snaps
Ease the repetitive task of geometry selection by using task-based power snap settings. AutoCAD Mechanical includes five settings for object snaps, as well as many more options for selecting specific
geometry than basic AutoCAD software offers. Quickly choose the snap setting that works best for the task at hand.

Design Navigation

Use the design navigation feature to better understand how designs fit together. As the user moves the cursor across a design, a small window displays part names. Expand this window to show parent/ child relationships inside assemblies. The entire part geometry is highlighted, with a single grip placed at the base point and an arrow showing default orientation.

Software Developer Kit (SDK)
Customize and combine features in AutoCAD Mechanical to achieve higher levels of productivity.
The SDK for the API (application programming interface) provides information to customize and automate individual features or combinations of features in AutoCAD Mechanical. It includes updated API documentation and sample scripts.