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Working Drawings in Engineering Graphics: A Comprehensive Guide

Learn about detail, assembly, and patent drawings in engineering, including title blocks, bill of materials, and revision blocks. Understand how to cost your bill of materials and project components effectively.

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Working Drawings in Engineering Graphics: A Comprehensive Guide

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  1. Lecture 08 Working Drawings Engineering Graphics & 3-D Modeling

  2. Working Drawings (3 Types) • Detail Drawings • provide all necessary information to manufactureasingle component • necessary views (shapes), dimensions, notes, mat’l • Assembly Drawings • provide information necessary to describe the fit and functionofinteracting components • necessary views (relations), few / no hidden lines & dimensions • Patent Drawings • provide information necessary to describe the features of an invention and support patent claims • explanatory (pictorial, shaded) representation • very highly structured legal document Engineering Graphics & 3-D Modeling

  3. Detail Drawing Engineering Graphics & 3-D Modeling

  4. Assembly Drawing Engineering Graphics & 3-D Modeling

  5. Assembly (Installation) Drawing Engineering Graphics & 3-D Modeling

  6. Working Documentation - Details • Title Block (Strip) • provides a structured arrangement of commonly required data about the interpretation of, and the responsibility for, the design • shown on each drawing • Bill of Material • provides a structured arrangement of commonly required data about the components in the design • attached sheet or shown on assembly drawings • Revision Block • provides a structured arrangement of commonly required data about the history of the design • shown on each drawing Engineering Graphics & 3-D Modeling

  7. Title Block Information (Every Drawing) • Title Block: • Part Name (Part Number *) • Company (Client *) name & address • Signatures of Designer (Checker *) & Engineer • Dates of Completion & Approval • Scale • Drawing Number • Engineer’s Seal * • PE registration number Engineering Graphics & 3-D Modeling

  8. Revision Block Information (If On-Drawing) • Revision Block: • Revision • Where changes were made • Description • What change(s) were made • Checked by • Who approved the changes • Date • When the changes were made Engineering Graphics & 3-D Modeling

  9. BOM Information (If On-Drawing) • Bill of Materials (Parts List): • Reference Number • Description • Quantity Required • Part Number * • Detail Drawing Number * • Material * • Weight * Engineering Graphics & 3-D Modeling

  10. Costed Bill of Material Engineering Graphics & 3-D Modeling

  11. How to Cost Your BOM • Get Materials Information from Web: • Density (mass per unit volume) • www.matweb.com (or similar) • Note the density for each req’d mat’l (g/cc3) • Cost (cost per unit volume, or cost per unit) • www.mcmaster.com or www.onlinemetals.com (etc) • Calculate price/unit volume for large piece • Calculate cost/unit for fasteners for large quantity • From Excel, for the BOM: • Multiply to find price/unit • Roll up sub-assembly costs to find total cost/assembly • NOTE: This is only the material cost, there are additional costs reflected in the purchase price! Engineering Graphics & 3-D Modeling

  12. Costed Bill of Material Engineering Graphics & 3-D Modeling

  13. Project Components • Project Toy: • Teams of about 4 students • Parts Needed: • All part details & 5 assemblies of the design packet (team) • Roof (necessary views) • Cab • Seat • Engine Housing • Carriage, Wheels, Gears, Tread • (2) Arm Links, Cylinder, Slide • End Effector, Joints, Blade • Bill of Material with Cost Roll-Up (Excel Spreadsheet 8-1/2 x 11 format) • Cover Sheet (Installation Drawing) • All drawings on Team-Formatted Title Blocks • Produce entire model on 3-D Printer (.STL files → .Thing files) • Need a pretty solid base • Printing overhangs is a problem → use (breakaway) supports • One alternate end effector from each team member (bonus pts!) • Team Design Packet: (turn in electronically by 1:00 PM on Wed. 13 DEC) Sub-Assembly Sub-Assembly Sub-Assembly Final Assembly Sub-Assembly Engineering Graphics & 3-D Modeling

  14. Submission Instructions To submit your team’s term project, do the following steps: • Open the F: drive from your computer • Go to the folder labeled tmpfiles • Go to the folder labeled IENG 248 Term Projects • Create/find the folder with your team name, and open it • Copy all of the following files into the folder: • Each individual part file • Each individual drawing file • Any assembly file(s) • Any other files that your team wishes to submit for grading • Send an e-mail to the instructor with the following subject: IENG Final Project – and add your team name at the end • In the body of the e-mail text: • List each team member and the part files / drawings / etc. that they created for the project – one student per line. • Hit the send button • Go enjoy your break! Engineering Graphics & 3-D Modeling

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