white table tops text books & work books. mechanical engineering linking in technical objects...

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