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