welding tech connect
TRANSCRIPT
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Calculations 2
Tech ConnectWelding
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Measuring Tools Used in Welding
Rulers
Steel rule
Hook rule
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Measuring Tools Used in Welding(continued)
Pocket tape
Steel tape
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Micrometers
Measuring Tools Used in Welding(continued)
Outside
Inside
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American and U.S. standard metal gauges
Measuring Tools Used in Welding(continued)
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Fillet gauge
Measuring Tools Used in Welding(continued)
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Calipers
Measuring Tools Used in Welding(continued)
OutsideInside
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Protractor
Measuring Tools Used in Welding(continued)
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Units of Linear Measurement
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Reading a Ruler
Reading inches: Each inch is marked by a
numbered line. These lines are the longest.
Reading inch: The second longest lines indicate
the inch marks.
Reading inch: The third longest lines indicate the inch marks.
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Reading a Ruler (continued)
Reading 1/8 inch: The fourth longest lines indicate
the 1/8 inch marks.
Reading 1/16 inch: The shortest lines indicate the
1/16 inch marks.
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Reading a Ruler (continued)
Step 1: Determine what type of ruler you are using.
Step 2: Line up the left end of the ruler with the left
edge of the object to be measured.
Step 3: Record the largest inch number closest to theright edge of the object.
Step 4: Count the number of lines from the whole inch
mark to the edge of the object.
Step 5: Determine what fraction to use.
Step 6: Record the entire measurement.
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Converting Units of LinearMeasurement
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Types of Angles
Straight angle
Right angle
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Types of Angles (continued)
Obtuse angle
Acute angle
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Using a Protractor
Step 1: Locate the common endpoint shared by both
sides of the angle and place the center of the protractor
on that point.
Step 2: Line up the edge of the protractor so that one
side of the angle crosses the zero mark on one of thescales.
Step 3: Determine where the other side of the angle
crosses the protractor, and use the same scale you
used in Step 2 to read the measurement of the angle.
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Polygons and Formulas used toCalculate Area and Perimeter
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Polygons and Formulas used toCalculate Area and Perimeter (continued)
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Polygons and Formulas used toCalculate Area and Perimeter (continued)
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Units Used to Measure Area
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Converting Square Units ofMeasurement
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Parts of a Circle
CircumferenceThe distance around a circle.
RadiusA line that joins the center of a circle with any
point on the circle.
DiameterA line that passes through the center of acircle.
PiA Greek letter () that represents the ratio of a
circles circumference to its diameter.
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A circumference is expressed using the
uppercase letter C.
C = x d, where d= diameter of a circle.
Calculating Circumference
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Calculating Area
Area (A) = r2
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Calculating Volume
Cube
Volume = length x width x height
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Calculating Volume (continued)
Rectangular solid
Volume = length x width x height
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Calculating Volume (continued)
Cylinder
Volume = r2 x height, where r = radius
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Units Used to Measure Volume
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Converting Cubic Units of Measurement
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Calculating Flat Stock Length GivenOutside Measurements
Flat stock length = (total length of bent metal)[(number of 90 bends) + (2 x (metal thickness))]
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Calculating Flat Stock Length GivenInside Measurements
Flat stock length = sum of inside dimensions
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Calculating Flat Stock Length GivenOutside Diameter
Step 1: Subtract the thickness from the diameter.
Step 2: Calculate the circumference using the diameter
calculated in Step 1.
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Step 1: Add the thickness to the diameter.
Step 2: Calculate the circumference using the diameter
calculated in Step 1.
Calculating Flat Stock Length GivenInside Diameter
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2008
Oklahoma Department of Career
and Technology Education