Welding Tech Connect

8/11/2019 Welding Tech Connect

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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


Outside

Inside


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American and U.S. standard metal gauges



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Fillet gauge



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Calipers


OutsideInside


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Protractor



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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

Welding Tech Connect

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