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Mechanical Engineering Technology

MEC 1011

MEC 1011 - Design Communication I
Fall 2007 Final Project

Due at the end of your Final Class.

Background:

This project will incorporate all the skills we have practiced thus far.

Objectives:

        Produce a complete set of working drawings for the chosen design using SolidWorks. All files will be saved in the Q: /MEC/1011/Fall_07/T4/Final/ folder. In your folder you will have 2 new folders; one for templates and 1 for ToolBox Parts. Be sure to direct your file locations to these folders. Your models should include logical sub-assemblies. Use A-size portrait sheets and ANSI A title blocks (or custom title block). (By creating templates you will be able to prefill the properties for both your drawings and models)

        Turn in a paper package consisting of:

a.                  A title page including a rendering of your machine in its environment and typical info such as Name, Date Section, etc

b.                  Your set of working drawings (printed 1:1 with drawing scale of your choice).

        Produce motion and assembly animation files (10M max each). Animate sub-assemblies separately.

        Produce a PowerPoint slide appropriate for the 36” plotter (17” x 17” sheet of paper). Your slide should feature a rendering of your machine (2000 pixels wide with aspect ratio locked) surrounded by images of your working drawings, See Example

        Create a set of e-Files and appropriate READ-ME file.

Conditions:

Priorities:

  1. Completeness: Each working drawing and the set of drawings must be complete.

        All Working Drawings: Include formal (consider standard ANSI A) title block and border. Title blocks include scale, author, checker and date, title.

        Assembly Drawing(s): Include exploded and assembled views (at least one of each - your choice of ortho, section or iso and consider two sheets) necessary to clearly show (consider detail views) what parts and how they go together. Also, include balloons (on assembled and exploded views), a parts list and good trails on any explosion. The parts list should at least include Item number, Quantity, material, and a column to name custom parts and clearly specify standard ones. The names of custom parts must match titles given on part drawings.

        Part Drawings: Include all views and dimensions necessary to define the part geometry.

        Drawing Set: Include an assembly drawing for each assembly and sub-assembly and part drawings for each custom part.

  1. Quality:

Challenge: Model and dimension in metric units. (20 point bonus)

Always:

        Avoid Contradictions: Never use the decimal places of the style (appearance) of a dimension (unfortunately Inventor calls this the ‘precision’ of the number) to round off a quantity. For example, if the length of a feature is 1.625, you should not allow its dimension to state 1.6.

        Dimension hole sizes and list characteristics using hole notes (use quantity note to show # of common holes - like 2X- edit hole note). This requires the also desirable use of hole features to model holes.

        Dimension a hole’s location by referencing a centermark or centerline.

        Place extension lines with visible ‘gaps’.

        Give meaningful names to your all files.

        Place dimensions off the views

Generally:

        If you’re stuck designing in English units, think in simple decimal sizes when you design (like 1.6), and use fractional sizes for stock and standard components only. When you use fractional sizes (like 1.625), dimension them with a fractional style (like 1 5/8).

        Avoid over dimensioning (saying the same thing twice).

        Apply geometric dimensions and tolerances where appropriate.

        Delete unused sketches (it’s easiest to kill them immediately).

        All work planes and axes exist for a good reason.

        Holes are placed using the hole wizard, (avoid extruding cut circles or placing hole features on sketched circles).

        Holes are tapped by modifying a hole feature (not by adding a thread feature).

        Holes are dimensioned with hole notes

        Specify part finish (using notes or symbols).

        Where a part is symmetrical, indicate symmetry with a centerline and tolerance the symmetry with a note.