Engineering Materials… · SHS2 Applied Technology

Lesson notes

Learning Objectives

Indicator: 2.2.1.LI.2 - Describe twist drills and use drilling and grinding machines.

By the end of the lesson, learners can:

Describe the twist drill and identify its major parts (shank, body, flutes, point, and cutting edges) with at least four parts correctly labelled on a diagram.
Explain the functions of the major parts of a drilling machine and a grinding machine.
Demonstrate the correct procedure for setting up and operating a drilling machine to produce a hole in a mild steel workpiece, following all safety rules.
Demonstrate the correct procedure for using a grinding machine to sharpen a twist drill or dress a workpiece, following all safety rules.
Evaluate a demonstration of drilling and grinding operations by identifying at least two correct practices and two safety violations observed.

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Curriculum details

Strand: Metal Technology (Strand 2)
Sub-strand: Engineering Materials, Tools, and Machines (2.1)
Content standard: 2.2.1.CS.1 - 2.2.1.CS.1 Demonstrate understanding in the use of engineering tools, materials and machines 2.2.1.LO.1 Develop and apply skills of heat treatment to a particular metal and perform operations using grinding, drilling, lathe and shaping machines
Indicator: 2.2.1.LI.2 - Describe twist drills and use drilling and grinding machines.
Suggested placement: Semester 1, Week 8 (Week 8 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: NaCCA curriculum document, p. 78

Exemplars (from the NaCCA curriculum)

Group work /Collaborative learning
- In mixed ability groups, assist learners to describe the twist drill and perform operations using drilling and grinding machines
Experiential Learning:
- At the workshop, assist learners to describe the twist drill and identify the major parts of the drilling and grinding machines and brainstorm their functions.
- Visit a local workshop with learners comporting themselves and help them to identify the twist drill, observe and demonstrate the use of the grinding and drilling machines.

Assessment (2.2.1.AS.2). The document marks these depth-of-knowledge levels for this indicator: Level 3 Strategic reasoning; Level 4 Extended critical thinking and reasoning.

Teaching and Learning Materials:
- Heat treatment equipment
- video clips/YouTube of heat treatment process
- Grinding, drilling
- lathe and shaping machines
- video/YouTube
- Educational trips
- Chart
- real object
- video clips
- Industrial visit
- Sand casting equipment