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GRABCAD CHALLENGE
GE Quick Connect 2015 Proposal
By: Reinaldo Wiener Rocca
PROJECT DESCRIPTION
 The project consist of
the design of a
clamping mechanism
for the brick-cavity
design at the left and
selection of a sealing
material that prevents
leaking during
pressurization of cavity.
From grabcad.com
TECHNICAL REQUIREMENTS
 No modifications allowed to the parts supplied
 Materials must be compatible to work with water
and between a temperature range of 1-40 °C
 Sealing material to be defined in the proposal, must
hold -1 to +3 bar pressure
 Quick Connect Elements must be used
 Able to produce in mass
 Design simplicity
 Reliability of seal
STRATEGY
 First a material for the seal was selected taking in
account the technical requirements
 Define the minimum pressure needed to avoid
leakage.
 Product scope:
 Reliable (35%): maintain the minimum pressure to avoid
leakage and resist dynamic loads
 Quick release and simplicity (30%)
 Low cost (20%)
 Maintenance (15%)
SEAL SELECTION
 It was found in
literature that a rubber
is commonly used in
water sealing, because
of the low price and
deformation properties.
Furthermore EPDM is
material that gives very
good price-reliability
balance
Extracted form Sealing Design
Guide from Rogers Corporation
MINIMUM PRESSURE
 Literature suggest a
50% of strain
compression for a
reliable seal and
Stress-Strain curve
gives the necessary
pressure to maintain (≈
6 MPa). In this case it
is needed extra tools to
assemble.
One-Dimensional Dynamic Compressive
Behavior of EPDM Rubber, B.Song and W.
Chen
FINAL PROPOSAL
MAIN ASPECTS
 Reliability:
 High strength material was selected since high forces
were needed to maintain the pressure of the seal.
 Sharp angles minimized to avoid fatigue failure, due to
cyclic loads.
 Simulations were performed to check all load scenarios.
 Quick release and Simplicity
 The final product is very easy to assemble and there is
no need to use complicated tools.
 It is not necessary to use other tools rather than a
wrench to adjust the seal pressure.
MAIN ASPECTS
 Low Cost:
 Reduced number of pieces, which are easy to
manufacture using machining or stamping processes.
 An AISI 1020 can be used, which is a cheap material.
 No esthetic design to minimize the manufacturing
process.
 Maintenance
 A paint or coating must be applied to the metal surface
to avoid corrosion or oxidation of the surface. This paint
must the applied with frequency depending of the water
exposure.

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Grabcad challenge GE quick

  • 1. GRABCAD CHALLENGE GE Quick Connect 2015 Proposal By: Reinaldo Wiener Rocca
  • 2. PROJECT DESCRIPTION  The project consist of the design of a clamping mechanism for the brick-cavity design at the left and selection of a sealing material that prevents leaking during pressurization of cavity. From grabcad.com
  • 3. TECHNICAL REQUIREMENTS  No modifications allowed to the parts supplied  Materials must be compatible to work with water and between a temperature range of 1-40 °C  Sealing material to be defined in the proposal, must hold -1 to +3 bar pressure  Quick Connect Elements must be used  Able to produce in mass  Design simplicity  Reliability of seal
  • 4. STRATEGY  First a material for the seal was selected taking in account the technical requirements  Define the minimum pressure needed to avoid leakage.  Product scope:  Reliable (35%): maintain the minimum pressure to avoid leakage and resist dynamic loads  Quick release and simplicity (30%)  Low cost (20%)  Maintenance (15%)
  • 5. SEAL SELECTION  It was found in literature that a rubber is commonly used in water sealing, because of the low price and deformation properties. Furthermore EPDM is material that gives very good price-reliability balance Extracted form Sealing Design Guide from Rogers Corporation
  • 6. MINIMUM PRESSURE  Literature suggest a 50% of strain compression for a reliable seal and Stress-Strain curve gives the necessary pressure to maintain (≈ 6 MPa). In this case it is needed extra tools to assemble. One-Dimensional Dynamic Compressive Behavior of EPDM Rubber, B.Song and W. Chen
  • 8. MAIN ASPECTS  Reliability:  High strength material was selected since high forces were needed to maintain the pressure of the seal.  Sharp angles minimized to avoid fatigue failure, due to cyclic loads.  Simulations were performed to check all load scenarios.  Quick release and Simplicity  The final product is very easy to assemble and there is no need to use complicated tools.  It is not necessary to use other tools rather than a wrench to adjust the seal pressure.
  • 9. MAIN ASPECTS  Low Cost:  Reduced number of pieces, which are easy to manufacture using machining or stamping processes.  An AISI 1020 can be used, which is a cheap material.  No esthetic design to minimize the manufacturing process.  Maintenance  A paint or coating must be applied to the metal surface to avoid corrosion or oxidation of the surface. This paint must the applied with frequency depending of the water exposure.