AME 211 - Computer-Aided Drafting and Manufacturing, Spring 2024 Homework 04 Problem 1 Create a ruler-based drawing of the part shown below [Bethune - Engineering Graphics with AutoCAD 2023, p504]. Draw all necessary views, add all dimensions and the linear and geometric tolerances listed below. Dimensions are given in millimeters. Submit a PDF file with an image of your drawing to D2L. 1. Define surfaces A, B, and C as primary, secondary, and tertiary datums, respectively. 2. Assign a tolerance of ±0.5 to all linear dimensions. 3. Assign a feature tolerance of 12.07-12.00 to the protruding shaft. 4. Assign a flatness tolerance of 0.01 to surface A. 5. Assign a straightness tolerance of 0.03 to the protruding shaft. 6. Assign a perpendicularity tolerance to the centerline of the protruding shaft of 0.02 at MMC relative to datum A. 30 40 40 90 90 040 30 30 60 A 30 B C 50 60 Problem 1 Item Ruler-based drawing with all details Cleanness and use of construction/projection lines Line types and widths All center lines included Consistency of dimensions All linear dimensions shown properly with tolerances All geometric tolerances shown properly, datums defined correctly Total 1 Points 10 35 ES555555 AME 211 - Computer-Aided Drafting and Manufacturing, Spring 2024 Problem 2 Using AutoCAD, redraw the shape shown below [Engineering Graphics with AutoCAD 2023, page 462], including dimensions and tolerances. Also list on the drawing the required maximum and minimum values for the specified distance. Dimensions are shown in inches. Fill in the title block with the basic information. Make sure to use the appropriate AutoCAD template. Save your work as an AutoCAD file and submit it to D2L. 1.50 55 .75 .500±.002 D 0.625-2 HOLES + Cmin = A B C Cmax= 1.625 1.623 2.625 ± .001 Problem 2 Item Use of AutoCAD and appropriate template Different layers (contour layer, center layer, dimension layer, text layer) Set up the dimension style and text style Correct units and consistent dimensions Title block filled Adding dimensions properly • All dimensions are listed with tolerances: 5 points • Use of correct notation: 3 points · • Total Placement of dimensions / cleanness: 5 points max. / min. values listed for specified distance: 2 points 2 Grade 343325 15 30 30 AME 211 - Computer-Aided Drafting and Manufacturing, Spring 2024 Problem 3 Using AutoCAD, create all necessary views for the shape shown below [Giesecke, page 266], including dimensions. Use 0.25” or 5mm for the small divisions shown, 0.5" or 10mm for the large ones. All holes are through. Fill in the title block with the basic information. Make sure to use the appropriate AutoCAD template. Save your work as an AutoCAD file and submit it to D2L. Problem 3 Item Use of AutoCAD and appropriate template All necessary views correct, with construction lines Different layers (contour layer, center layer, dimension layer, construction lines) Set up the dimension style and text style Correct unit and consistent dimensions Title block filled Adding dimensions properly • All dimensions listed: 8 points Placement of dimensions / cleanness: 3 points Total 3 Grade 3 9 4 3 321 11 35 AME 211 - Computer-Aided Drafting and Manufacturing, Spring 2024 Grading Rubric Definitions Necessary number of views: Necessary number of views means choosing the views that have the fewest hidden lines and show essential contours or shapes most clearly. • Adequately represent the object. Use the combination that fits best on the paper. The right and left views (top and bottom views, front and rear views) do not need to be shown both. Use of constraints: Constraints and (o)snap features are used on drawing elements as required to generate accurate drawings. Use of custom layers: All layers used in the drawings are custom-defined with line width, line type and color. Consistency of dimensions: Dimensions that are used to create the drawings follow the dimensions given in the figure • ● In terms of units (e.g., inch or millimeter). Length of the lines compared to each other. For instance, if two lines have lengths of 2 mm and 4 mm, the length of the first line should look like half of the other line. Cleanness and use of construction lines: The constructions lines are used to layout different parts of the drawing such as lines (and edges), centers, segments, and circles to ensure that (not limited to) • • The lines (and edges) that are parallel or vertical stay parallel or vertical Angles between the lines stays consistent with the given drawing Arcs follow the curvature and radius of the circle that they belong to Adding dimensions properly: • Use of dimensions lines Appropriate placement of dimensions • • All dimensions are listed • Use of correct notation • No extra/redundant dimensions