1. Mechanical Engineering
Linking in Technical Objects
Guiding Controls

2. Pages
Work book p. 217
Text book p. 427

3. Linking in technical objects

4. Mechanical Engineering is…
A branch of engineering that focuses on the design, production, analysis, working and improvement of technical objects with moving parts

5. A link allows…
Two or more parts of a technical object to be held together

6. In mechanics, a component is…
a part or fluid that performs a mechanical function

7. Linking is…
The mechanical function performed by any component that connects different parts of a technical object

8. The degrees of freedom are…
The set of independent movements that are possible for a given part in a technical object

9. Possibilities of Independent Motion

12. Translational Motion

13. Translational Motion

14. Translational motion From left to right From top to bottom
From back to front Tx Ty Tz

15. Left to Right (Tx)
X-Axis

16. Top to Bottom (Ty)
Y-Axis

17. Back to Front (Tz)
Z-Axis

18. Rotational Motion

19. Rotational Motion

20. Rotational Motion About the x axis About the y axis About the z axisRx Ry Rz

21. X-Axis (Rx)
X-Axis

22. Y-Axis (Ry)
Y-Axis

23. Z-Axis (Rz)
Z-Axis

24. Characteristics of links
p. 218

25. 1st Characteristic pair
Direct
Indirect

26. Direct Cell Phone > Case
A direct link exists when two parts can hold together without requiring a linking component
Cell Phone > Case

27. ? Indirect Arm > Frame
An indirect link exists when the parts require a linking component to hold them together ?
Arm > Frame

28. 2nd Characteristic pair
Rigid
Flexible

29. Rigid Base > monitor
A rigid link exists when the surfaces of the linked parts or the linking component are rigid
Base > monitor

30. Flexible Pages > spine
A flexible link exists when the surface of the linked parts or the linking component can be deformed
Pages > spine

31. 3rd Characteristic pair
Removable
Non-removable

32. Removable Lid > Bottle
A removable link exists when linked parts can be separated without damaging them
Lid > Bottle

33. ? Non-removable Sole > upper
A non-removable link exists when separating the linked parts damages them or the linking component
Sole > upper ?

34. 4th Characteristic Pair
Complete
Partial

35. Complete link Top > bottom
There is a complete link when there is no movement between linked parts
Top > bottom

36. Toggle of the Zipper to the base
Partial
There is a partial link when at least one part is capable of motion with respect to the other
Toggle of the Zipper to the base

37. Guiding Controls
Work book p. 221
Text book p. 431

38. Guiding is…
The mechanical function performed by any component that controls the motion of one or more moving parts

39. A Guiding Component or Control is..
A component whose mechanical function is to guide the motion of moving parts

40. Adhesion is…
The phenomenon by which two surfaces tend to remain in contact with each other without slipping

41. In Mechanics, Friction is…
A force that resists the slipping of one moving part over another

42. Lubrication is…
The mechanical function performed by any component that reduces friction between two parts

43. Main Types of Guiding

44. Translational Guiding
Ensures the straight translational motion of a moving part

45. Rotational Guiding
Ensures the rotational motion of a moving part

46. Helical Guiding…
Ensures the translational motion of a moving part while it rotates about the same axis

47. Homework Pp

48. Activity # 2: Links Lab
Goal: Study Various technical objects to determine the characteristics of the links in them

49. Materials Beaker tongs Petri Dish Retort Stand Overflow Can
Universal Clamp
C-clamp
Screw Driver