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  • Marking, cutting and finishing techniques > Metals
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          5. Marking, cutting and finishing techniques

          Talking book


          image
          To hold materials in place while we work with them, we use a bench vice, a bar clamp, a C-clamp or a ring clamp. We can also use hand tools such as tongs and pliers.

          We use hand and power tools for these techniques. We will look at marking, cutting, drilling, shaping and finishing.

          5.1. Marking

          Talking book

          Centre punch and scriber

          The centre punch is used to mark lines and the scriber to mark points on sheets of metal.

          How to mark a piece of metal:

          image
          1. Put the centre punch on the point you want to mark and hit the other end of the scriber hard once with a hammer.
          2. Use the scriber to mark straight lines on the metal. You should use rulers and carpenter's rulers like the ones you can see in the pictures.
          3. You can also use dividers to draw lines, circles and arcs, and to transfer measurements.
          image

           

          5.2. Cutting

          Talking book
          Cutter Guillotine Punch press and die Hacksaw
          Used to cut soft, flexible, thin sheets of metal. It can cut in straight, angled or curved lines.
          image
          Used to cut thin sheets of metal.
          image
          Used to cut sheets of 5 mm or thinner.
          It is used to cut simple pieces to the required shape by bringing the press down against the die.
          image
          This has an arc-shaped metal frame, a plastic or metal handle and nuts or wing nuts that hold the blade in place.
          It's used to cut metal in straight, accurate lines.
          image

           

          Power tools for cutting
          Circular saw Grinder

          Used to cut large metal sheets. It can cut along straight or sloping lines.

          image

          This has a circular disc that can be used for many things. This tool can be used for cutting, sanding, polishing, planing, removing rough edges, etc. We use different types of discs depending on what we want to do.

          image
           

          5.3. DRILLING

          Talking book
           

          A router does a lot of the cutting, drilling and cleaning jobs we have studied. A router turns very quickly and shaves off material so we get an excellent finish. Depending on the bit we use, we can make grooves, cuts, teeth and many other shapes.

          image
          Awl Drill

          A long piece of metal with a
          sharp end.

          image

          Used to make holes with drill bits.

          image

          5.4. Shaping

          Talking book
          Chisel Lathe

          This tool has a double-sided sharp edge. It's used to shape metal by hitting the handle with a hammer and holding it at a 5º angle.

          image

          This power tool is used to shape cylindrical objects. It works by turning the object while a blade moves along the length of the object removing the metal.

          image

          5.5. Cleaning

          Talking book

          Scraper

          image

          This is a small metal, triangular blade with sharp edges. It's used to shave small fragments.

          5.6. Power tools for cleaning

          Talking book
           
          • We use tools and power tools on metal pieces for different operations.
          • Some of these operations are marking, cutting, drilling, shaping and cleaning.
          • In all of these operations we have to use the right techniques and follow health and safety rules.
          Sander Grinder

          The motor moves the sandpaper, which is made from abrasive material, backwards and forwards rapidly. Sanding is quick and even.

          image

          This tool removes material to perfect surfaces. It is very precise and can remove as little as a hundreth of a milimeter of material.

          image

           

          image
          Animation 4. Marking, cutting and finishing techniques

           

          1

          Activity 23
          What do you use the tools in the photo for?

          2

          Activity 24
          As you study the different equipment and tools, make a list of the ones you will need to use in order to make your aluminium flower.

           
          Marking, cutting and finishing techniques
          Metals
          Without background sound
          Logo

          Activity 23

          0/1
          What do you use the tools in the photo for? 
          • To draw marks and lines on the machines.

          • Correct answer
            Wrong answer
          • To hold materials in place while we work with them, they help prevent accidents.

          • Correct answer
            Wrong answer
          • To cut sheets and boards.

          • Correct answer
            Wrong answer
          t1-multimedia

            3 attempts
          Done
          Marking, cutting and finishing techniques
          Metals
          Without background sound
          Logo

          Activity 24

          P
          As you study the different equipment and tools, make a list of the ones you will need to use in order to make your aluminium flower.

            1 attempt
          Done