3.2 marking out techniques Flashcards
specialist marking tools
paper and wood
pencil
mortise gauge- mortise and tenon joint
marking gauge - line parallel to an edge
specialist marking tools
polymers
craft knife- polypropylene
scriber- show bend or fold line
chinagraph pencil - draw a bend line on acrylic
drywipe marker- draw a bend line on acrylic
specialist marking tools
metal
scrribber
center punch- position of a hole
measuring tools
odd leg callipers
internal callipers
external callipers
odd leg calllipers
line parallel to edge
metals
sheet polymers
internal callipers
distance between two opposite sides
channelor hole
external callipers
external distance such as thickness, external diameter
square
set square
engineers square
mitre square
stry square
set square
papers
boards
lines 40degrees 30 60 90
try square
wood
manufactured board
90degrees from edge
mitre square
wood
manufactured board
lines 45 degrees
mitre joints
engineers square
metal
90degrees
from edge
micro meter
diameters
external thicknesses
manual or digital
+- 0.02mm
vernier callipers
depths
external or internal measurements
digital
+- 0.001mm
densitometer
used to determine the degree of darkness optical density
digital reading
printing inks for papers and boards
dividers
distance between two pints
also circles on sheet wood
metal
polymer
jigs
speeding up the marking and machining processes
holds the work, guides the tool
drilling jig- guide a drilll into the correct position on the material without the need for marking
fixture
Holds work in given position while manufacturing process takes place
go/ no go gauges
speed up the proccess of finding dimensionally inaccurate products in a volme production
made with maximum and minimum allowance/ allowable dimension
the product is placed into the gauge, if it is an acceptable size it goes forward, if not it is rejected
