robot modelling and assembling day 2
DESCRIPTION
TRANSCRIPT
Week 1 Day 2
Workshop by
Highlights of Previous Lecture
• Learnt what a robot is?
• Robot Uses
• Common Robotic Parts
Today’s Lecture
• Working Areas in Robotics• Introduction to Computer Aided Drafting (CAD)• CAD Advantages• Different Types of CAD softwares• Introduction to Pro Engineer (Features)• Environment Familiarization• Different types of file extentions• Working Directory Setting• Making Our First Sketch
Working Areas in Robotics
Mechanical
ComputersElectrical
and Electronics
Working Areas in Robotics (Cont)
Mechanical
• Structure
• Joint Mechanism
• Bearings
• Heat Transfer Characteristics
• Sensors
Mechanical
ComputersElectrical
and Electronics
Working Areas in Robotics (Cont)
Electrical and Electronics
• Control Electronics
• Power Amplifiers
• Signal Conditioning
• Sensors
Mechanical
ComputersElectrical
and Electronics
Working Areas in Robotics (Cont)
Computers
• Computing Hardware Design Mechanical
ComputersElectrical
and Electronics
Lets Make Things Easy
• In order to master robotics we will focus on subsystems.
• Mechanical is a huge field therefore we’ll only be working on structures only
Mechanical
History of Drawing
• All the drawings were previously made on paper using special tools (Pictures of manual drafts to follow)
• Tools also to be displayed
• Engineering design graphics has made significant changes since the early 1980s. For the most part, these changes are a result of the evolution of computer-aided design (CAD). Before CAD, design was accomplished by traditional board drafting utilizing paper, pencil, straightedges, and various other manual drafting devices.
Introduction to CAD
• All the products today are designed using computer (examples to follow of different products and robots)
Introduction to CAD
• CAD stands Computer Aided Drafting (Common sense says that we use computer to product our drafts)
Getting Started with Pro/E
• Double click the Pro/ENGINEER icon on your desktop to get started
• Splash screen will appear and after a while Pro/ENGINEER window will be visible
Title Bar
Menu Bar
Tool Bar
Navigation Pane
Browser Window
Message Pane
Features Toolbar
Tool Bars
FileToolbar
EditToolbar
ViewToolbar
Model Display Toolbar
Datum Display Toolbar
• File > Set Working Directory
Working Directory should be selected before starting work in Pro/ENGINEER Wildfire 4.0
Setting up Working Directory
Getting Started to Draw
• Click the “New” button on the File Toolbar
• The “New” window appears
• Select “Sketch”
• Name it “Sketch1”
• Click “OK” or Press Enter
• The “Sketch Mode” will now be available
Some Definitions
• Sketcher
– A 2D drafting/drawing mode
• Sketch
– The entities of a section that define the basic shape of a feature
• Entity
– An element within the sketcher environment, such as a line, arc, or circle
The Sketch Mode Environment
Drawing Area/Sheet
Sketcher Toolbar
The Sketcher ToolbarSelect tool
Line tool
Rectangle tool
Circle tool
Arc tool
Fillet tool
Spline tool
Point tool
Create Dimension tool
Modify Dimension tool
Add Constraints tool
Add Text tool
Insert for foreign data
Mirror tool
Trim tool
Drawing Basic Entities
• Lines
• Rectangle
• Circles
• Arcs
Exploring the “Line” tool
• The “line” when expanded looks like this
Draws a 2-point line
Draws tangent lines w.r.t 2 curves
Draws center line
Circle Tool & its Drop Down Arrow
• We will now have a look at the different options in the Circle tool
• Click the drop down arrow and you will the expanded tools
Draws circle w.r.t center and a point
Concentric circle – circle within a circle
Draws circle w.r.t to 3 points
Draws circle w.r.t to 3 tangents
Draws an ellipse or an oval
More of the “Arc” tool
• Clicking the drop down arrow at the side of the “arc” tool, displays sub-options
Right-Angled Triangle
The “Fillet” Tool
• We will be rounding its edges with the “Fillet” tool, available in the Features toolbar
• A “Select” pop-up window appears when click on the “Fillet” icon
• Also observe the message in the “Message” box at the bottom of the screen
• “Select 2 entities” mean selecting two different lines
• We will click the horizontal line first. It will turn blue. And then click the vertical line.
• The rectangle edge will become like as shown below
• Follow the same procedure for all other vertices until you have the sketch as shown
Practice