How to interpret a technical drawing is an essential skill to anyone involved in the manufacturing industry. This course is designed for those seeking an overview of drawing interpretation. This course presents the basic elements of a print and introduces the concepts that students must master to successfully interpret engineering drawings. Material covered includes: visualizing the part, reading standard symbols and notes, and finding and interpreting the drawing information needed for a task. Designed to provide you with an understanding of GD&T fundamentals, this course focuses on the basic requirements of engineering drawings, numeric dimensions and tolerances and geometric dimensions and tolerances.
- The Basics of Manufacturing Prints: What manufacturing prints are and why they are used; Who uses them and how; The manufacturing cycle and purpose of prints; The basic requirements of technical drawings; Prints are interpreted according to standards and represent contractual requirements
- The Reading of Manufacturing Prints: Ways a three-dimensional part is drawn on two-dimensional paper; Identifying edges and faces of a part from isometric views or multiple projected views; Standards for interpretation
- The Total Manufacturing Print: Print sizes, lines, lettering & scale; Language, local & global notes; Title block & revision history block
- Views: Labeled views; Views of different scale; Interpreting views not placed in the standard arrangement; Section views
- Dimensions: What dimensions are and why they are important; Fundamental dimensioning and tolerancing rules; Symbols associated with dimensions; Linear, diametral, radial, and angular dimensions; Dimensioning of common features
- Numeric Tolerances: What tolerances are and why they are important; The ways numeric tolerances are indicated on prints; Determining tolerance values for numeric tolerances given implicitly, explicitly, symbolically, and by limit dimensioning; Calculating tolerance accumulations
- Geometric Tolerance Fundamentals: How geometric tolerances work; Thinking of parts as collections of features not dimensions; Features with size and surfaces; Maximum Material Condition and Least Material Condition; What bonus tolerance is and when it applies
- The Datum Reference Frame Concept: The purpose of a datum reference frame; Establishing datums from various datum features; What datum shift is and when it applies
- Interpretation of Geometric Controls: The geometric characteristic symbols used to impose geometric requirements
- Surface Finish: Terms describing surface texture; Interpretation of the standard surface texture symbol and its modifiers; Common surface treatments & coatings
- Threads: Terminology of threads; Thread forms; Recognizing thread features in drawing views; Interpretation of the standard notations for thread features
- Machine Terms and Manufacturing Processes: Common terms used for features and manufacturing processes; Recognizing when a specific manufacturing process is required; Interpreting hardening requirements
- Casting, Forging, and Molded Part Prints: The manufacturing process for these parts; Common part features; Methods of documenting parts; Interpretation of notes & symbols unique to prints made for these processes
- Welding and Sheet Metal Prints: Types of joints & welds; Methods of documenting welded parts & sheet metal parts; Interpretation of the standard weld symbol and its modifiers; Interpretation of notes & symbols unique to prints made for sheet metal parts; Calculating bend allowances
- Gears, Splines, and Cams: Terminology of gears, splines, and cams; Recognizing gear and spline teeth in drawing views; Interpreting gear & spline data tables; Calculating gear data; Interpreting cam displacement diagrams and other information unique to cam prints
- Types of Manufacturing Prints: Recognize other types of industrial prints and what they are used for, including assembly, common parts, piping & circuit diagrams, installation, altered item, outline, pictorial, layout, control, interface prints, and more.
Students will be able to:
- Interpret and describe the technical information provided on industrial prints through drawings, dimensions, and notes.
- Navigate the total manufacturing print, including lines, scale, language, symbols, title blocks, and other components.
- Visualize parts from drawings consisting of multiple views, including basic, auxiliary, partial and various types of section views.
- Identify part dimensions and tolerances including geometric dimensioning and tolerancing.
- Learn how geometric tolerances supplement conventional tolerances to specify limits on allowable variation.
- Calculate minimum and maximum allowable values for dimensions considering tolerances
- Recognize the symbols used with the geometric system of tolerances.
- Recognize basic dimensions on prints and understand their meaning.
- Identify and properly read feature control frames.
- Recognize when bonus tolerance is available and calculate geometric tolerance values when bonus tolerance applies.
- Recognize datum feature identifiers applied to features with size and surfaces.
- Analyze the datum reference frame including order of precedence.
- Identify and read geometric controls on location, orientation, form, profile & runout.
- Interpret standard surface finish symbols and screw thread designations.
- Interpret symbols and notes used to communicate special manufacturing requirements that are not directly illustrated and dimensioned.
- Analyze drawing features, symbols and notes unique to castings, forgings, and molded part prints.
- Analyze weld symbols and interpret the unique symbols found on welded part prints and sheet metal prints.
- Analyze drawing features, symbols and notes unique to gears, splines, and cams.
- Identify relevant information from a variety of other common types of prints.
Course Delivery Details:
- Class Duration (live): 3 Days (24 Hours), 8:00am – 4:00pm (EST) each day
- Class Duration (online): 5x 5-hour sessions (24 hours), 9:00am – 2:00pm (EST) each day
- Prerequisites & Preparations: None
- Modes of Teaching and Learning: Lecture/discussion, Individual work sessions, Group work sessions, Large print review
- Textbook: Hammer’s Blueprint Reading Basics, 4th ed., by Charles Gillis, Industrial Press
- Workbook: Blueprint Reading with GD&T Workbook, QSG
- Who Should Attend: Machine operators, quality control inspectors, NC programmers, shop supervisors, metal-working manufacturing personnel, and other manufacturing professionals interested in learning how to read blueprints or updating their knowledge in this area. Note: This course is not intended for engineers who need to create prints. For a more in-depth coverage of GD&T, see: https://qualitysupportgroup.com/geometric-dimensioning-and-tolerancing-gdt-3-day/