1. Mechanical Functions

2. Class Starter
Give an example of a technical system and name some of it’s components (different parts that make it up). _____________________________________________ _____________________________________________
What is a mechanical function? _____________________________________________ _____________________________________________
What would be the mechanical function of these different components?____________________________________ _____________________________________________

3. Review - Mouvements Translation Rotation Helical
moves in straight line
Rotation
moves in a circular pattern
Helical
A combination of translation & rotation

4. Review – external Forces
Compression
Force that crushes a material
Tension
Force that stretches a material
Torsion
Force that twists a material
Bending
Force that bends a material
Shearing
Force that cuts or tears a material

5. Mechanical Functions
Technical systems are made up of different components.
Each component in a system plays an important role in the overall functioning of the system.
The role played by a component in a technical system is called a mechanical function.

6. Vocabulary words
Basic Mechanical Function: the role played by a component or a group of components in the function or assembly of a technical object.
Components: the parts or fluids in a technological object that have a mechanical function.

7. Guiding: the basic mechanical function of any component that controls the motion of one or several moving parts.
Guide: a component that has the basic mechanical function of guiding.
Link: connect two or more parts of a technical object.
Linking: the basic mechanical function provided by any component that links an object’s parts.
Linking component: one that has the basic mechanical function of linking.

8. Basic Mechanical Functions
The 2 types of basic mechanical functions we will be looking at are:
Links
Guiding control

9. 1) Links
A link connects, fastens, or puts together two or more components of a technical object. Ex: nail, screw, nut, bolt, glue

10. Characteristics of Links
A link always has 4 characteristics.
Direct or indirect
Rigid or flexible
Removable or non-removable
Complete or Partial

11. 1
DIRECT
INDIRECT
Two parts can hold together without a linking component.
Two parts must hold together WITH a linking component.

12. 2
RIGID
FLEXIBLE
The surfaces of linked parts or linking components can be deformed.
The surfaces of linked parts or linking components are rigid.

13. NON- REMOVABLE REMOVABLE 3
Linked parts can be separated with no resulting damage.
Separating the linked parts will cause damage.

14. 4
COMPLETE
PARTIAL
At least one part is capable of motion with respect to the other.
No movement between linked parts.

15. Let’s practice… __________________ ____________________
__________________ ____________________
__________________ ____________________

16. direct rigid
removable complete
indirect rigid
non-removable partial

17. 2) Guiding Control
Guidance is the function of a part that directs another part along a specific path.
Guidance dictates whether the motion is either rotational or translational.
ROTATIONAL
Ensures the rotational motion of a moving part
Usually a cylindrical part
TRANSLATIONAL
Ensures the straight motion of a moving part
Usually a groove or a slide

18. Rotational or translational guide?
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19. Translational
Rotational
Translational
Rotational