Description:

Introduces methods of communicating technical information in engineering design and research. Topics include freehand sketching, lettering, scales, drawing layout, orthographic projection, pictorials, auxiliary views, section views, dimensioning, descriptive geometry, thread and fastener specifications, and tolerances. Includes an introduction to computer-aided drafting. Prerequisite: MATH 098 or 099.

Outcomes:

After completing this class, students should be able to:

• Mechanical Drafting
• Write neat and well formed vertical, uppercase lettering.
• Use drafting instruments: triangles, compass, protractor, and French curve.
• Draw visible, hidden, centerline, and cutting plane line types with proper darkness and width.
• Slide triangles to construct parallel and perpendicular lines.
• Arrange triangles to divide 360 degrees by 15 degree increments.
• Geometric Constructions.
• Bisect a line segment.
• Divide a line into any arbitrary number of equal units.
• Bisect an angle.
• Inscribe or circumscribe a triangle, square, pentagon, hexagon, or an octagon about a circle.
• Construct an arc that is tangent between two lines, a line and an arc, or two arcs.
• Use and Architect’s, Engineer’s, or Metric scale to measure or layout a distance.
• Determine the most appropriate scale given an available drawing area and an object size.
• Views.
• Identify and rectify missing lines in a set of orthographic views.
• Draw a set of orthographic views given an isometric pictorial.
• Construct an ellipse inside a rhombus.
• Draw an isometric and oblique pictorial given a set of orthographic views.
• Determine an auxiliary view given a set of orthographic views.
• Properly draw a section view for a given cutting plane through an object.
• Determine the best view in which to place a dimension of an object feature.
• Observe and omit possible redundant dimensioning.
• Use the technique of datum surfaces for multiple dimensions in a view.
• Descriptive geometry.
• Determine the true length, slope and bearing of a line.
• Determine the strike and dip of a plane.
• Determine the true size of a plane.
• Determine the perpendicular distance between a point and a line.
• Determine the perpendicular distance between two non-intersecting lines.
• Determine the perpendicular distance between a point and a plane.
• Determine the visibility between a line an a plane.
• Determine the angle between a line and a plane.
• Determine the dihedral angle between two planes.
• Computer-Aided Drafting.
• List the basic components of a CAD system.
• Use Cartesian and polar coordinate systems to locate a point.
• Draw and edit basic objects in a CAD program.
• Thread and Tolerance specifications.
• Draw schematic and simplified thread representations.
• List the parts of a thread: major diameter, lead, pitch, thread angle, crest, and root
• Specify the proper thread note from English and metric thread tables.
• List the basic tolerance terms:
• allowance, nominal size, basic size, fit, clearance, interference, transition, basis.
• Specify the proper tolerance note for English and metric fits.
• Engineering technical graphs.
• List the basic types of line graphs using single and dual scales on an axis direction.
• Construct a clear and precise line graph from sample data.