Mechanical Test gr11
Mechanical test Memo
ENGINEERING GRAPHIS AND DESIGN
Overview
According to (Douglas SotsakaI; Asheena Singh-PillayII, n.d.) students need to develop a skill which allows them to apply visual reasoning and interpret graphical text. The aim of this Lesson on Mechanical assembly is to broaden students graphical and visual reasoning skills.
individual should be in a postion to interpret every mechanical assembly drawing and all sectioning that is involved in this chapter.
INTRODUCTION
TABLE OF CONTENT
1. INTRODUCTION: https://www.oercommons.org/courseware/lesson/80402/student/315219
2. LESSON 1: https://www.oercommons.org/courseware/lesson/80402/student/315219
3. POWERPOINT PRESENTATION: https://www.oercommons.org/courseware/lesson/80402/student/315219?task=3
4. INFORMAL TASK: https://www.oercommons.org/courseware/lesson/80402/student/315219?task=4
5. IFORMAL TASK MEMORANDUM: https://www.oercommons.org/courseware/lesson/80402/student/315219?task=5
Engineering graphics and design is offered from grade 10-12, its aim is to develop student's cognitive skill and enable them to communicate graphically, apply spatial visual reasoming through reading and interpreting graphical text (Douglas Sotsakal; Asheena Signh-Pillayll, n.d). Element of this subjecr are introdeced in grade 8 through an elementary subject known as technology and the focus then is to teach students basic inductory skills to drawing.
The link below gives an overwiew and a brief introduction of what Engineering graphics and design is.
https://www.youtube.com/watch?v=NJmEGLcUiWk
MECHANICAL ASSEMBLY DRAWING
Lesson Objective:
by they end of this lesson student need to know and understand different sectional views of mechanical assembly and understand how each component is hatched.
CONTENT.
The image below demonstrates a half sectoned mechanical assembly
Figure two demonstrate important mechanical parts. i will label each part and its function.
- KEY is used to prevent a shaft slipping inside a pulley
- KEYWAY is a groove for a key
- SHAFT is a long cylindrical component used to transmit turning force
- TAPER is a reducing diameter, from thin to thicker or thicker to thinner
- EXTERNAL TREAD has helical grooves cut around a shaft to attach a nut or other internal thread
- SHAFT
- THROUGH HOLE passes from one side of the component through to the other
- FLANGE is a disk at the end of a pipes or shafts to join them together
- KEYWAY is a groove that is used with a key to prevent rotation of components
- FIXED COLLAR is a raised part of a shaft used to position components
- SQUARE on shaft can be used to rotate another component instead of a key
- SQUARE SLOT is a shape to fit another feature
- RIB (also called a web) strengthens or supports another feature
- RECESS is a shallow hole
- SLOT is an elongated hole usually with round ends 16. TEE SLOT or TEE GROOVE allows another shaped component to slide along it
- CHAMFER is when a corner is removed, usually at 45 degrees
- GROOVE is a long narrow channel
- ROUND is when an outside corner is rounded
- BLIND HOLE is a hole that does not go all the way through a part
- MOVABLE COLLAR is a ring used to locate components on a shaft
- LUG is part of a casting that sticks out used for securing or adjusting the position
- THROUGH HOLE passes from one side to the other 24. INTERNAL THREAD has helical grooves cut inside a hole to attach a bolt or other external thread
- WEB (rib) is a thinner, strengthening piece on a casting
- FILLET is a rounded corner to prevent casting cracking
- SQUARE HOLE saves material
- BRACKET is a supporting device
- BORE is a cylindrical hole inside a casting
- BUSH is a sleeve placed inside a casting that will wear our and can be replaced easier and cheaper than the casting
the video below is an example of how to use calculations when drawing nuts and bolts.
https://www.youtube.com/watch?v=JEIy30EQVEQ
Grade 11 JPEGD solution for the Activiy.
POWERPOINT PRESENTATION
Powerpoint slide presentation explain in detail, the importance of hatching and calculations of nuts and bolts
ASSESSMENT TASK
Below there is an attached informal assessment you need to complete to evaluate your understanding regarding Mechanical assessmbly drawing.
After completing the task you can use the memo to evaluate your work.
MEMO FOR ASSESSMENT 1
Students below is an attchement for the previous informal you complete. and the video will enhance you spatial visual reasoning skills;