3D CIC: Home Edition – CAD Hackathon with Sigmetrix

Join us for a 3D CIC: Home Edition virtual event on January 20, 2021, with a little friendly competition! Enter your best show of tolerancing for a chance to win prizes up to $100.

We all like to think we can tolerance our parts in accordance with ASME Y14.5, but the tolerancing game isn’t always as easy as it seems! Use the CAD system of your choice to annotate the provided hinge assembly so that the components’ GD&T satisfy the design requirement to keep the door located and oriented to the door frame when the door is closed.

Submissions will be judged using Sigmetrix’ GD&T Advisor to perform expert assessment of the correct application of GD&T.
Submission deadline extended: Sunday, January 17^th, 2021.

Join us at the Home Edition event to view the 1^st and 2^nd place winning submissions, along with an expert explanation of the GD&T principles involved. Live audience Q&A is welcomed.

Wednesday, January 20, 2021
9:00 am Mountain ᛫ 11:00 am Eastern

Can’t make it to the live event? Watch the broadcast on January 21 at 1:00 pm MT.

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Rules

• Download the assembly as a STEP (AP 203/214) here:

• Use a CAD system of your choice.
• Apply annotations to just the hinge components (2 hinge parts and hinge pin).
• Apply annotations as machine-readable and digitally associated with the geometry it defines.
• Apply annotations per ASME Y14.5-2009 or ASME Y14.5-2018:
  • Step 1: Identify and qualify datum features that establish a Datum Reference Frame (DRF). 
  • Step 2: Apply GD&T to the remainder of the features, referencing the DRF established from the datum features qualified in Step 1.
• The only plus/minus dimensions and tolerances allowed are Features of Size (FOS) with a True Position Tolerance.  The only exception to this rule is if the FOS establishes a primary datum feature.
  • Plus/minus tolerances must be symmetric.
• Submit the native CAD and/or lightweight viewable (e.g. 3D PDF, HTML) here:

Submission Deadline Extended: Sunday, January 17^th, 2021

Questions? Email us at 3DCIC@action-engineering.com.

Design Details

What you need to know about how the door hinge mounts on the door:

• One side of the hinge attaches to the door frame using three #8-32 screws, and the other side of the hinge attached to the door jam also using #8-32 screws.
• The major diameter of the screw thread is Ø.164 MAX, and the tapped holes in both the door and frame are located with a position tolerance of Ø.020 to their respective DRFs on each part with a projected tolerance zone sufficient to cover their installed height.
• The pin connecting the two hinge plates is modeled to nominal.
• The hinge components’ GD&T should satisfy the design requirement to keep the door located and oriented to the door frame when the door is closed.

Judging Criteria

Winners will be judged on the following criteria. Judges will use Sigmetrix’ GD&T Advisor to perform a tolerance stack-up analysis of the entire assembly.

• 25 points – Datum feature selection and qualification.
• 25 points – Accuracy of applying the Geometric Tolerance (GTOL) of each feature to unambiguously constrain each part as appropriate within the assembly context.
• 25 points – Machine readability of GD&T.
• 10 points – Tolerance values to maximize manufacturing allowances to minimize cost, and still always fit together.

Prizes

1^st and 2^nd place will be chosen and displayed during the January 20^th, 2021 3D CIC: Home Edition event. Register here.

• 1^st Place – $100 Amazon Gift Card
• 2^nd Place – $75 Amazon Gift Card
• 3^rd Place – $50 Amazon Gift Card

Good luck!

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Action Engineering is hosting a series of free virtual events for the MBE community. These sessions leading up to 3D CIC feature industry experts, vendor interviews, and group discussions. Find out more at 3DCIC.com.

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Submit Your Entry!

Deadline: Sunday, January 17^th, 2021

Submissions are closed.