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# Math on Metal - PCC

Math on Metal The Welding Fabrication Industry needs qualified welder fabricators who can deal with a variety of situations on the job. This portion of the training packet explores mathematics

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### Transcription of Math on Metal - PCC

2 Smaller? 51-54 Rounding decimals 55-57 3 Converting decimals to fractions 58-59 Adding Decimals 60-61 Subtracting Decimals 62-63 TOLERANCES- HOW TO CALCULATE THEM 64 Bilateral and Unilateral Tolerances 65-66 Fractional tolerances 67-68 Decimal Tolerances 69-71 Angle tolerances 72 Joint Preparation Tolerances 73-74 MEASURING TOOLS 75 Measuring with fractions- skills needed in using a ruler; reducing fractions, expressing fractions in higher terms 76-79 Ruler- reading it with accuracy 80-83 Metric ruler 84 Converting decimals to the nearest 1/16th of an inch for reading rulers 85-86 Protractor 87-90 Bevel (Angle) Finder 91-92 Micrometer 93-101 WIRE DIAMETER 102 Converting fractional wire sizes to decimal sizes 103-104 RATIO & PROPORTION 105 Introduction to ratio and proportion using the box method 106-108 PERCENTAGES 109 Solving percentage problems using the box method 110-112 ACCURATE SETTING AND ADJUSTMETNS 113 Making current adjustments (percentage reductions) 114-115 Checking and adjusting wire feed speed 116-121 Setting machine dials 122-130 4 METRIC MEASUREMENTS 131 Using your hand as a metric measuring tool 132 How big or little are linear metric measurements?

3 Body reference chart 133 Estimating length in millimeters 134 Converting to metric equivalents using the box method 135-136 Metric conversion chart 137 Metric to Metric Conversions-converting from larger and smaller metric units 138-141 Using a metric step ladder 142-145 SOLVING A FORMULA 146 Solving formulas; using Ohms law & temperature conversions as examples 147-149 Order of Operations 150-153 Squaring numbers 154-156 Dimensional analysis 157 TEMPERATURE CONVERSIONS 158 Using what you know about solving formulas to convert from Celsius to Fahrenheit or visa versa 159-160 ELECRTRC POWER PROBLEMS 161 Using what you know about solving formulas to solve electric poser problems 162-163 GEOMETRY 164 Understanding circles and Pi 165-167 Squaring numbers 168-170 Square roots 171-172 Area of rectangles 173-174 Area of triangles 175-178 Construction with angle/Bevels 179-180 Area of circles 181-185 Squaring your corners 186-187 Squaring off & finding the center of your rectangle 188-192 Geometric Construction for Fabrication on Metals 193-198 Forming pipes and tubes out of flat Metal 199-200 Making trigonometry Work for You- finding missing 201-227 5dimensions.

4 Fabrication CALCULATING THE COSTS OF A WELDING JOB 228 What is Included in the Cost of Welding? 229 Calculating Arc Time vs Prep Time- Using Percentages 230-231 Calculating Direct Labor Costs 232-235 Operating Factor 236 Overhead Costs 237 Calculating the Cost of Steel 238-242 Calculating the Cost of Welding Consumables 243-248 Calculating the Cost of Materials 249-252 HEAT INPUT 253 Heat input lab using current, voltage and speed 254-260 6 HOW TO USE THIS PACKET This packet is meant to be used as a reference guide and a learning tool. It contains nearly all of the math worksheets that were developed for the math on Metals Project which have been interspersed throughout all of the welding packets. The worksheets have been collected, edited, and rearranged in an order that we hope will be helpful to all welding students, whether you are taking just a few classes for welding skills upgrade or you are a degree or certificate seeking student.

5 When compiling this math reference packet, care was taken to build on skills, starting from the most basic (whole number, addition, subtraction, multiplication, division) moving on quickly to fractions, decimals, ratios, percentages, formulas and geometry. Throughout the math worksheets and this packet, applications of the skills have been tied directly to the welding projects and problems you will encounter in the classroom and on the job. Although the skills build in a logical order, this reference guide is not necessarily meant to be started at the beginning and moved through on a step-by-step basis, but rather it is intended to be used to fill in math knowledge gaps and to provide examples of math applications that would be helpful to welders. Using the detailed table of contents you should be able to locate the specific math application and also the background theory that you may need in order to gain a thorough understanding of any math related problem you encounter.