Marking and Joining Metals Flashcards
What is an Engineering Square used for?
Mark Lines 90 degrees from edge of material
Check square components or corners
(Like Try Square)
What is an Engineering Bevel?
Adjustable angle marker
What are tools used for Marking a Surface?
Scriber Marking Blue Dividers Odd-Leg Calipers Surface Gauge and Surface Plate Dot Punch
What is a Scriber?
Sharp tool
Marks accurate lines
What is a Marking Blue?
Thin Ink spread on metals left to dry, when scratched it leaves a shiny visible line
What are Dividers?
Mark out circles or arcs
One point digs into material whilst other point scribes line into the surface of the material
What are Odd-Leg Calipers?
Scribe lines parallel to a straight edge
Notched leg slides along edge of metal while scriber point marks a line
What is a Surface Gauge and Surface Plate used for?
Marking parallel lines accurately
What is a Dot Punch?
Conical Point ground to 60 degrees
Used for marking positions of drill holes
Used to make small dotted indentations on marked out lines, making lines clearer when cutting or shaping
What is a Centre Punch?
Conical tip ground to 90degrees
Used for marking centres of holes for drilling
Punch put into dot punch mark and enlarges it
Prevents drill bit wandering across surface
What is Welding?
Use of heat to melt edges of metals being joined
Forms a pool of molten metal that when cooled forms the joint
What is Soldering?
Using a bonding alloy to form a joint
The ‘Parent Metals’ don’t melt
Surface is cleaned with flux and heat is applied with gas torch
Solder is applied which melts and ‘runs’ between Parent Metals
