white table tops text books & work books. mechanical engineering linking in technical objects...
TRANSCRIPT
White Table Tops
Text Books & Work Books
Mechanical Engineering
• Linking in Technical Objects• Guiding Controls
Pages
• Work book p. 217• Text book p. 427
Linking in technical objects
Mechanical Engineering is…
• A branch of engineering that focuses on the design, production, analysis, working and improvement of technical objects with moving parts
A link allows…
• Two or more parts of a technical object to be held together
In mechanics, a component is…
• a part or fluid that performs a mechanical function
Linking is…
• The mechanical function performed by any component that connects different parts of a technical object
The degrees of freedom are…
• The set of independent movements that are possible for a given part in a technical object
Possibilities of Independent Motion
Translational Motion
Translational Motion
Translational motion
• From left to right
• From top to bottom
• From back to front
• Tx
• Ty
• Tz
Left to Right (Tx)
X-Axis
Top to Bottom (Ty)
Y-Axis
Back to Front (Tz)
Z-Axis
Rotational Motion
Rotational Motion
Rotational Motion
• About the x axis
• About the y axis
• About the z axis
• Rx
• Ry
• Rz
X-Axis (Rx)
X-Axis
Y-Axis (Ry)
Y-Axis
Z-Axis (Rz)
Z-Axis
Characteristics of links
p. 218
1st Characteristic pair
• Direct
• Indirect
Direct
• A direct link exists when two parts can hold together without requiring a linking component
Cell Phone > Case
Indirect
• An indirect link exists when the parts require a linking component to hold them together
Arm > Frame ?
2nd Characteristic pair
• Rigid
• Flexible
Rigid
• A rigid link exists when the surfaces of the linked parts or the linking component are rigid
Base > monitor
Flexible
• A flexible link exists when the surface of the linked parts or the linking component can be deformed
Pages > spine
3rd Characteristic pair
• Removable • Non-removable
Removable
• A removable link exists when linked parts can be separated without damaging them
Laces > eyelets
Non-removable
• A non-removable link exists when separating the linked parts damages them or the linking component
Sole > upper?
4th Characteristic Pair
• Complete
• Partial
Complete link
• There is a complete link when there is no movement between linked parts
Top > bottom
Partial
• There is a partial link when at least one part is capable of motion with respect to the other
Cap > pen
Guiding Controls
Work book p. 221Text book p. 431
Guiding is…
• The mechanical function performed by any component that controls the motion of one or more moving parts
A Guiding Component or Control is..
• A component whose mechanical function is to guide the motion of moving parts
Adhesion is…
• The phenomenon by which two surfaces tend to remain in contact with each other without slipping
In Mechanics, Friction is…
• A force that resists the slipping of one moving part over another
Lubrication is…
• The mechanical function performed by any component that reduces friction between two parts
Main Types of Guiding
Translational Guiding
• Ensures the straight translational motion of a moving part
Translational Guide
Rotational Guiding
• Ensures the rotational motion of a moving part
Rotational Guide
Helical Guiding…
• Ensures the translational motion of a moving part while it rotates about the same axis
Helical Guide
Homework
Pp. 217-224
Activity # 1• Table = group
• 1 student with white board + pen
• Group I.D. characteristics of link
• Write answers on white board
• Winners = prize
The types of « Links » between Parts
The “link” between the frame and the adjusting screw is:
?
Non-removable or removable,Complete or partial,
direct or indirect,rigid or flexible,
.
The types of « Links » between Parts
The “link” between the frame and the adjusting screw is:
?
Non-removable or removable,Complete or partial,
direct or indirect,rigid or flexible,
The types of « Links » between Parts
The “link” between the frame and the adjusting screw is:
?
Non-removable or removable,Complete or partial,
direct or indirect,rigid or flexible,
The types of « Links » between Parts
The “link” between the frame and the adjusting screw is:
?
Non-removable or removable,Complete or partial,
direct or indirect,rigid or flexible,
The types of « Links » between Parts
The “link” between the frame and the adjusting screw is:
?
Non-removable or removable,Complete or partial,
direct or indirect,rigid or flexible,
Types if GUIDES
The types of « Guides » between Parts
The Guide between the frame and the adjusting screw is:
?
TranslationalRotational
Helical
The types of « Links » between Parts
The “link” between the bottom handle and the top handle is:
?
permanent or removable,fixed or moveable,direct or indirect,rigid or flexible,
.
The types of « Links » between Parts
The “link” between the bottom handle and the top handle is:
?
PERMANENT or removable,fixed or moveable,direct or indirect,rigid or flexible,.
The types of « Links » between Parts
The “link” between the bottom handle and the top handle is:
?
PERMANENT or removable,fixed or MOVEABLE,
direct or indirect,rigid or flexible,
.
The types of « Links » between Parts
The “link” between the bottom handle and the top handle is:
?
PERMANENT or removable,fixed or MOVEABLE,direct or INDIRECT,
rigid or flexible,.
The types of « Links » between Parts
The “link” between the bottom handle and the top handle is:
?
PERMANENT or removable,fixed or MOVEABLE,direct or INDIRECT,
RIGID or flexible,.
Wind Turbine Project
Horizontal Axis