CAD/CAM Lab# 01 Date:

INTRODUCTION TO PTC CREO ELEMENTS PRO 5.0

Objective:
Introduction to Cumputer Aided Design (CAD) and 2-D sketching with the help of PTC
software.

Theory:
CAD (computer-aided design) software is used by architects, engineers, drafters, artists,
and others to create precision drawings or technical illustrations. CAD software can be used to
create two-dimensional (2-D) drawings or three-dimensional (3-D) models.

History:
The beginnings of CAD can be traced to the year 1957, when Dr. Patrick J. Hanratty
developed PRONTO, the first commercial numerical-control programming system. In 1960, Ivan
Sutherland MIT's Lincoln Laboratory created SKETCHPAD, which demonstrated the basic
principles and feasibility of computer technical drawing.

2D:
The first CAD systems served as mere replacements of drawing boards. The design
engineer still worked in 2D to create technical drawing consisting from 2D wireframe primitives
(line, arc, B spline ...). Productivity of design increased, but many argue that only marginally due
to overhead – design engineers had to learn how to use computers and CAD. Nevertheless
modifications and revisions were easier, and over time CAD software and hardware became
cheaper and affordable for mid size companies. CAD programs grew in functionality and user
friendliness. (1974). This is 100% true that CAD first started off with using a sketch pad.

3D:
3D wireframe features were developed in the beginning of the sixties, and in 1969 MAGI
released Syntha Vision, the first commercially available solid modeler program. Solid modeling
further enhanced the 3D capabilities of CAD systems. NURBS, mathematical representation of
freeform surfaces, appeared in 1989 -- first on Silicon Graphics workstations. In 1993 CAS
Berlin developed an interactive NURBS modeler for PCs, called NöRBS.

CAD:
Computer-aided design (CAD) is the use of computers (or workstations) to aid in the
creation, modification, analysis, or optimization of a design. CAD software is used to increase
the productivity of the designer, improve the quality of design, improve communications through
documentation, and to create a database for manufacturing. CAD output is often in the form of

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electronic files for print, machining, or other manufacturing operations. The term CADD (for
Computer Aided Design and Drafting) is also used.

CAM:
Computer-aided manufacturing (CAM) is the use of software to control machine tools
and related ones in the manufacturing of workpieces. This is not the only definition for CAM,
but it is the most common CAM may also refer to the use of a computer to assist in all operations
of a manufacturing plant, including planning, management, transportation and storage. Its
primary purpose is to create a faster production process and components and tooling with more
precise dimensions and material consistency, which in some cases, uses only the required
amount of raw material while simultaneously reducing energy consumption.

Using the Tools Setup Dialog Box

The menu bar of the Tools Setup dialog box contains the following menus:

File—Contains the following commands:

• Open Tool Library—Retrieve tool from the tool library.

◦ By Reference—Establishes a direct association with the library model. You cannot modify the
parameters for the tool using the Tools Setup dialog box.

◦ By Copy—Copies the tool information into the manufacturing model. The tool parameters for
the NC sequence can be modified using the Tools Setup dialog box.

◦ Use Outline—Reads in the model parameters and geometry, and generates the tool outline by
projecting the external profile of all components of the selected tool model to the XZ-plane of
the TIP coordinate system. This option is available only for the tool types TURNING and
TURN-GROOVING.

• Open Parameter File—Retrieve a tool from the saved tool parameter file (files with the .xml,
.tpm, tprm, or .txf extension)

• Open Std Size—Open a tool with standard size and dimensions.

• Save Tool—Save the selected tool along with the tool parameters. The tool parameters are
saved in a file with the same name as that of the tool and have the .xml extension.

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• Save As—Select and export a single tool or multiple tools to a tool exchange file. The tool
exchange file is saved with the default name <workcell_name><head_x_optional> with the .txf
extension. You can use this file to transfer tools. from one manufacturing model to another.

• Save Tool List—Save current tool table information for all tools to a file with the . xml
extension. The default file name is <tool_dialog_tool_list>.

• Done—Finish the tool setup and close the Tools Setup dialog box.

• Quit—Abort the tool setup.

Edit—Contains the following commands:

• Replace—Replace the selected tool with a tool of the same type from the files system.

• Replace from Workcell—Replace the selected tool with a tool of the same type from the
current or any other workcell.

The commands Save As, Replace, and Replace from Workcell are available if you start the Tool
Manager from the Machine Tool Setup dialog box. They are not available if you start it while
redefining an NC or CMM step.

• Table Comments—Opens the Setup Tool Table Comment dialog box.

• Sketch—Modify the tool using the sketcher.

View—Contains the following commands:

• Where Used—Opens the Information Window. The Information Window displays the list of
NC sequences in which the listed tools are used.

• All Tools—Displays the tool.inf file in the Information Window. The tool.inf file contains the
properties of all the listed tools.

• Auto Preview—Allows you to toggle the auto preview functionality. Click Auto Preview to see
the section view of the tool in the preview window. To remove the auto preview functionality,
clear the check box adjacent to Auto Preview by clicking it. If you close the Tools Setup dialog
box without closing the tool preview window, the next time you open the Tools Setup dialog
box, Creo NC checks if the auto preview functionality is on. If the auto preview functionality is
on, Creo NC opens the tool preview window.

The toolbars of the Tools Setup dialog box contain the following icons:

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—Define a new tool. When you click , Creo NC displays a pictorial representation of all tools
that you can define for an NC sequence or workcell. If you click without selecting a tool type,
Creo NC displays the tool setup options for the default tool for the workcell or the NC sequence.
If you access the Tools Setup dialog box while defining an NC sequence, Creo NC displays the
pictorial representation of only those tools that are relevant for the NC sequence that you want to
create.

— Retrieve tool from the tool library.

---Save the selected tool along with the tool parameters.

—Display the details of the selected tool in printable format in the Creo Parametric browser.

—Delete the selected tool.

—View the selected tool in a separate window. The modifications that you make to the tool
setup are automatically updated in this preview window.

—Start the Column Setup Builder to create custom views.

Show Details/Hide Details—A toggle button to display the tool parameter tabbed pages.

PTC CREO TOOLS:

--- This is One-by-One item selection tool. We use it to select items one by one very
easily.

--- This is line tool. With the help of this tool we make center line,
discontinuous line, and Drawing line.

--- This is rectangle tool. We make rectangles by this tool.

--- This is circle tool. We make single circle, 2 points circle, 3 points circle
etc.

--- This is three point/ tangent tool. With this we can draw different lines of
different angles.

--- This is circular tool. We make circular lines with this.

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---This is chamfer tool. We create chamfer between two entities.

--- This is spline tool. Create spline line.

-- Point tool to create points.

---- Dimention tool. We check dimentions of lines with this.

---Modifing tool. Modify values of dimentions, geometery or text entities.

--- Vertical tool. We use it to make lines verticale, horizontal etc.

--- Text tool. Chose this tool to create text in the diagram.

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Task 1:

Procedure:
In this task I follow the following steps:

 First of all I created a new file > Sketch and generated a new sketch file.
 Then from the line tool I used centerline tool to mark center line vertically and
horizontollay for my work.
 Then I choose circle tool to make a circle of 2 inch.
 Then again chose the circle tool and again make a new circle at the top of the previous
circle.
 At the distance of 6 inches I make a curve line as shown in fig.
 Now at this point I again marke a center line.
 From this center line I made a line of 2 inches I make a vertical line downwards.
 At the step of 0.8 inches I make a box as shown in fig.
 Hence I completed my task successfully.

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Task 2:

Procedure:
In this task I follow the following steps:

 First of all I created a new file > Sketch and generated a new sketch file.
 Then from the line tool I used centerline tool to mark center line vertically and
horizontollay for my work.
 Then I choose circle tool to make a circle of 5 inch.
 Then again chose the circle tool and again make a new circle at the top of the previous
circle.
 At the distance of 4 inches I make a curve line as shown in fig.
 From this center line I made a curve line of 7 inches I make a vertical line downwards.
 At the end a line of 12 inches I joind both lines as shown in fig.
 Hence I completed my task successfully.

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Task 3:

Procedure:
In this task I follow the following steps:

 First of all I created a new file > Sketch and generated a new sketch file.
 Then from the line tool I used centerline tool to mark center line vertically and
horizontollay for my work.
 Then I choose circle tool to make a circle of 120 inch.
 Then again chose the circle tool and again make a new circle of 90 inch at the top of the
previous circle.
 At the distance of 252 inches I make a curve line as shown in fig.
 Then again I make a center line vertically.
 I made a circle of 55 inch at new center point.
 I made a new circle above the previous circle.
 Joined two half circles by a line of 252 inches.
 Hence I completed my task successfully.

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Task 4:

Procedure:
In this task I follow the following steps:

 First of all I created a new file > Sketch and generated a new sketch file.
 Then from the line tool I used centerline tool to mark center line vertically and
horizontollay for my work.
 Then I choose circle tool to make a circle of 2 inches.
 I made a line of 3 inches at the distance of 4.25 inches above the circle.
 At the end of this line I made a downward line of 1inch.
 From this line I made a new line of 5.25 inches as shown in fig.
 At the end of this line I made a new line of 3.75 inches vertically downward.
 Made a curve line as shown in the fig.
 At the distance of 2 inches I made a line downwards.
 Joined this line by a 5 inches line.
 Hence I completed my task successfully.

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