Tools for Metalwork: Metalwork Projects II – JSS3 Home Economics Lesson Note (Second Term)

Metalwork projects are hands-on tasks in which metal is cut, shaped and joined to make useful or decorative items, such as a bottle opener.

Behavioural objectives

By the end of the lesson, students should be able to:

1. name examples of simple metalwork projects;
2. identify common tools for metalwork and state their uses;
3. state safety rules to follow when working with metal;
4. list the materials for making a simple bottle opener;
5. describe the steps for making a simple bottle opener.

What are metalwork projects?

Metalwork projects are tasks that involve cutting, shaping and joining metal to create functional or decorative items.

Examples of simple metalwork projects

• Bottle opener: a small flat tool for removing bottle caps.
• Trash bin or cans: containers made from sheet metal.
• Homemade knives: blades shaped from flat metal and fitted with a handle.
• Fire pits: outdoor metal containers for holding a fire.

What tools are used for metalwork?

The tools for metalwork are the hand and power tools used to measure, cut, hold, shape, drill, join and protect while working metal.

Measuring and marking tools

• Metal ruler or measuring tape: used for accurate measurements.
• Metal marking tools: a scribe or metal marker, used for marking cut lines.

Cutting tools

• Hacksaw: used for cutting metal rods, pipes or sheets.
• Metal shears or tin snips: used for cutting thin sheets of metal with precision.

Holding tools

• Vice: holds metal securely while you work on it, giving stability.
• Metal clamps: hold pieces of metal together securely during the work.

Shaping and smoothing tools

• Files: used for smoothing and shaping metal edges after cutting.
• Bench grinder: helps with sharpening tools, smoothing metal surfaces and removing burrs.
• Bending tools: a metal brake or a vice with bending capabilities, used for shaping metal.

Drilling and joining tools

• Drill with metal drill bits: used for making holes in metal.
• Welding machine: used if the project involves joining metals by welding.

Protective equipment

• Safety glasses: protect the eyes from metal chips and sparks.
• Gloves: protect the hands from sharp edges and heat.
• Ear protection: reduces noise, especially when cutting or grinding metal.

What is the difference between a hacksaw and tin snips?

A hacksaw is a toothed-blade saw held in a frame, used to cut thick metal such as rods, pipes and bars.

Tin snips are scissor-like hand shears used to cut thin metal sheet.

What are the safety rules for metalwork?

Safety rules for metalwork are the habits that protect the worker from cuts, burns, sparks and flying metal.

• Wear safety gear: put on glasses and gloves before cutting, drilling or grinding.
• Clamp the work: hold the metal firmly in a vice or clamp before cutting or drilling.
• Handle edges with care: freshly cut metal is sharp, so file off burrs early.
• Keep the bench tidy: remove loose tools and metal scraps from the work area.
• Do not touch hot metal: metal stays hot after welding or grinding.
• Use tools only for their purpose: a wrong tool can slip and cause injury.

How do you care for metalwork tools?

Caring for metalwork tools means cleaning, storing and checking them so they last and work well.

• Clean after use: brush off filings and wipe the tools dry.
• Keep dry: moisture causes rust on steel tools.
• Store properly: return each tool to its place in a toolbox or rack.
• Replace dull blades: a blunt hacksaw blade cuts poorly and slips.

How do you make a simple bottle opener?

A simple bottle opener is made by cutting, drilling, smoothing and fixing a metal blank to a handle.

Materials

• Metal blank: a flat, sturdy piece of metal for the main body. It can be cut from a metal sheet or reused from old metal objects.
• Metal rod or bar: for the handle. It should be comfortable to grip and sturdy.

Tools needed

• Cutting and marking: ruler, scribe and hacksaw.
• Holding and drilling: vice and drill with a metal bit.
• Finishing: files, sandpaper or grinder.
• Joining: welding machine, if the rod is to be welded.
• Protection: safety glasses and gloves.

Procedure

1. Put on safety glasses and gloves.
2. Sketch a simple design, deciding the size and shape of the main body and handle.
3. Use the hacksaw to cut the metal blank to the desired shape. Cut the metal rod to the right length for the handle.
4. Mark and drill a hole near one end of the metal blank where the lever will be attached. Make the hole large enough for easy movement.
5. Use metal files, sandpaper or the grinder to smooth and shape the edges. Round the edges for safety and comfort.
6. Insert the metal rod through the hole in the blank to make the handle. Secure it tightly by welding, or by bending the rod at the back and fixing it in place.
7. File any rough edges, polish the metal if desired, and check that the lever moves smoothly.
8. Test the bottle opener on a bottle to make sure it works well.

Evaluation

1. Name four examples of simple metalwork projects.
2. Identify five tools for metalwork and state their uses.
3. State three safety rules to follow when working with metal.
4. List the materials needed to make a simple bottle opener.
5. Describe the steps for making a simple bottle opener.

Assignment

Draw a simple design of a bottle opener. Beside it, list the tools you would use and write the steps for making it.