processes tools and joinings t3

• How do you mark out wood?


  a sharp pencil, steel rule, try-square and marking gauge
• How do you mark out polymers?


  Marker pen, steel rule, scribe, try-square and geometry equipment
• How do you mark out metals?


  Blue permanent ink, marker pen, scribe, divider
• How do you mark out paper/board?


  Pencil, pen, ruler, geometry equipment(compass, set-square,protractor)
• How do mark out textiles?


  Fabric marker, tracing paper, templates, pins
• What is an odd leg calliper?


  Used to mark out parrellel lines from one datum to another, look like portractor just bent and without a part to hold a pencil
• What is a try square?


  Try square are vital to achieve accurate measurements from a specific datum point fixed at a 90 degrees, can be adjusted
• What is a vernier scale?


  Highly precise measuring instrument used for measuring micrometers, look like a spanner with a ruler
• What is a densitometer?


  A densitometer is used to test the materials density by a beam of light that measures its resistance when reflected back records the absorption and calculates relative density
• What is a jig?


  Jigs guide the tools working on a component and make sure it is positioned in the same place.provides accuracy and repeatability
• What is a fixture?


  Used to hold and support a specific peice of work in place ensures repeatability and interchangeability (end off desks)
• What is a go/no go gauge?


  Check single measurement for tolerance range with pass or fail reading
• What are the 4 types of "joining" used?


  Adhesive, mechanical, heat, joining
• What does absorbent mean?


  Means the material is porous such as timber
• Is metal absorbent?


  No as it's not porous it requires contact or other specialist adhesives.
• What is an adhesive?


  a substance capable of holding materials together in a functional manner( like a glue)
• How can plastics be joined with adhesive?


  Chemical bonding
• What are the 3 types of adhesive used mainly for plastic?

  Acrylic solvent cement, tensol, cyanocrylite
• What is adhesive solvent cement?


  Works by softening both surfaces and chemically bonding them together
• What is tensol?


  Adhesive applied to both surfaces and then the materials is clamped for atleast 24 hours to form a strong joint
• What is cyancrylite?


  Known as superglue can be used to join MULTIPILE types of materials forms a quick and strong join
• What are the two types of mechanical joints?


  Semi permanent and permanent
• What are the semi permanent methods of mechanical joinings?


  Nails, screws, nuts and bolts, staple, seam joint
• What is the permanent methods of mechanical joining?


  Riveting
• What is riveting?


  A joining process involving a short metal pin or bolt for holding together two plates of metal; its headless end being beaten out or pressed down when in place by a gun or hot metal riveting or resistance spot riveting( electrodes force from top and bottom to create permanent joint) it's complex and skilled work but efficient
• What are the two types of welding?

  MIG as TIG
• What is MIG welding?


  Metal inert gas (MIG) welding is a welding process in which an electric arc forms between a consumable wire electrode and the workpiece metal(s), which heats the workpiece metal(s), causing them to melt and join. 3000-20000 degrees
• What is TIG welding?


  TIG (tungsten inert gas) welding is a process used to weld metals such as stainless steel as well as non-ferrous metals such as aluminium and copper or magnesium alloys. Up to 20000 degrees
• What are the methods of heat joining?


  Soldering, brazing, welding
• What is solder?


  low heat method (300 degrees) used for joining a range of metals used in jewellery and electronic boards
• What is brazing?


  Brazing is a metal joining process uses medium heat of 450 to join materials such as copper for plumbing
• What are the wood joints?


  Butt, dowel, lap, mitre, mortice and tenon, finger/box, dovetail
• What is a butt joint?


  A joint where two parts are connected by placing them next to each other usually at 90
• What is a dowel joint?


  A Joint between 2 pieces of wood connected by a small dowel has two dowel pins
• What is a lap joint?


  A joint where 2 parts overlap each other one recessed one supported
• What is mitre joint?


  Used widely in door frames and pictures, cut at 45 degrees
• What is mortice and tenon joint?


  Two components which one fits inside the other to form a strong joint
• What is finger/ box joint?


  Skilled process cut like loads of squares at the end which connect like a puzzle aesthetic and strong
• What is a dovetail joint?


  Very skilled process, no wood adhesive required like a finger/bow but slanted peices, expensive
• What are knock down fittings?


  Knock down fittings are used in flat pack furniture and fit the pieces of the product together eg barrel nut, cam lock, modesty block and bolt