Keg tap
From DDL Wiki
(Difference between revisions)
(→Failure Modes and Effects Analysis (FMEA)) |
(→Failure Modes and Effects Analysis (FMEA)) |
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| Screwed on tightly | | Screwed on tightly | ||
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| None, gluing these threads makes disassembly harder | | None, gluing these threads makes disassembly harder | ||
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| Robust spring | | Robust spring | ||
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| Sell spare parts | | Sell spare parts | ||
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| O-Ring | | O-Ring | ||
| Seal | | Seal | ||
- | | | + | | O-ring becomes hardened |
- | | | + | | Loss of air tight seal for pressurizing keg |
- | | | + | | |
- | | | + | | Repeated use and time |
- | | | + | | |
- | | | + | | Oil the o-ring to keep it moist |
- | | | + | | |
- | | | + | | |
- | | | + | | Sell spare parts |
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| cell 8 | | cell 8 | ||
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- | | | + | | |
| cell 11 | | cell 11 | ||
Line 603: | Line 603: | ||
| O-Ring | | O-Ring | ||
| Seal | | Seal | ||
- | | | + | | O-ring becomes hardened |
- | | | + | | Loss of air tight seal for pressurizing keg |
- | | | + | | |
- | | | + | | Repeated use and time |
- | | | + | | |
- | | | + | | Oil the o-ring to keep it moist |
- | | | + | | |
- | | | + | | |
- | | | + | | Sell spare parts |
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Revision as of 13:54, 20 September 2009
Contents |
Executive Summary
- Describes key findings and recommendations
Major Stakeholders and Product Needs
- Identify major post-production stakeholders and list major product needs for each
Usage
- Document in detail how the product is used, step by step, and summarize findings from your user studies.
Bill of Materials
- Also identify standard purchase parts.
Keg Tap Components
Assembly Diagrams
- Include pictures of the assembly with all components labeled
Mechanical Function
- Document how the system functions mechanically
Design for Manufacturing and Assembly (DFMA)
- Highlight findings and opportunities for improvement, indentifying where our competitor has followed guidelines and made good choices.
- In particular, are there opportunities to improve manufacturability and make a competing product cheaper? Identify where material and process choices are appropriate or inappropriate for expected production volume.
Failure Modes and Effects Analysis (FMEA)
- Highlight findings and opportunities for improvement, indentifying where our competitor has followed guidelines and made good choices.
- In particular, are there important failure modes that should be considered in a redesign or a new design? Focus on use phase, rather than manufacturing.
Part # | Item | Function | Failure Mode | Effects of Failure | S | Cause of Failure | O | Design Controls | D | RPN | Recommended Actions |
---|---|---|---|---|---|---|---|---|---|---|---|
1 | Black Ball | Grip for Pumping | Could be Unscrewed and Lost | Uncomfortable Pumping | Unaware Users | Make sure the ball is screwed on tightly | Put some glue on threads | ||||
2 | Plunger | Forces Air into Keg | This part is very robust. Cannot foresee any failure modes. | ||||||||
3 | Plunger Disc | Air Tight | This part is very robust. Cannot foresee any failure modes. | ||||||||
3.1 | O-Ring | Seal | O-ring becomes hardened | Loss of air tight seal for pressurizing keg | Repeated use and time | Oil the o-ring to keep it moist | Sell spare parts | ||||
4 | Cylindrical Plunger Casing | Supply Keg with Pressure | Dent in the casing, burs, scratches, rust on the inside of the casing | Plunger cannot be moved inside the case, o-ring gets torn up | Misuse, Dropping the tap | All these pieces are robust | None | ||||
5 | Cylindrical Top | Encloses Plunger in Casing | Top comes unscrewed | Cannot pressurize keg | Human tampering | Screwed on tightly | None, gluing these threads makes disassembly harder | ||||
6 | Spring | Prevents Plunger from Getting Stuck | Breaks | Plunger, though unlikely, may get stuck at top of casing | Misuse or fatigue | Robust spring | Sell spare parts | ||||
7 | Center Cylinder | Separates Air Input from Beer Output | 1)Leaks beer at the connection point with hose
2)Creates turbulence in beer flow | 1)Loss of beer
2)Foamy beer | 1)Sealant on threads is old
2)Manufacturing | 1)Sealant is used
2)Their Design | cell 9 | cell 10 | 1)None
2)Look into smoother way to transition into tubing | ||
7.1 | O-Ring | Seal | O-ring becomes hardened | Loss of air tight seal for pressurizing keg | Repeated use and time | Oil the o-ring to keep it moist | Sell spare parts | ||||
8 | Lever | Attaches Tap and Keg | cell 3 | cell 4 | cell 6 | cell 8 | cell 11 | ||||
8.1 | Plastic Casing | cell 2 | cell 3 | cell 4 | cell 6 | cell 8 | cell 9 | cell 10 | cell 11 | ||
8.2 | White Cap | cell 2 | cell 3 | cell 4 | cell 6 | cell 8 | cell 9 | cell 10 | cell 11 | ||
8.3 | Spring | cell 2 | cell 3 | cell 4 | cell 6 | cell 8 | cell 9 | cell 10 | cell 11 | ||
8.4 | Center Rod | cell 2 | cell 3 | cell 4 | cell 6 | cell 8 | cell 9 | cell 10 | cell 11 | ||
8.5 | Nut | cell 2 | cell 3 | cell 4 | cell 6 | cell 8 | cell 9 | cell 10 | cell 11 | ||
8.6 | Washer | cell 2 | cell 3 | cell 4 | cell 6 | cell 8 | cell 9 | cell 10 | cell 11 | ||
9 | Lever Pin | cell 2 | cell 3 | cell 4 | cell 6 | cell 8 | cell 9 | cell 10 | cell 11 | ||
10 | Base | Attaches to Keg | cell 3 | cell 4 | cell 6 | cell 8 | cell 9 | cell 10 | cell 11 | ||
10.1 | O-Ring | Seal | O-ring becomes hardened | Loss of air tight seal for pressurizing keg | Repeated use and time | Oil the o-ring to keep it moist | Sell spare parts | ||||
11 | Hose | Transfers Beer from Tap to Cup/Mouth | cell 3 | cell 4 | cell 6 | cell 8 | cell 9 | cell 10 | cell 11 | ||
12 | Nozzle | Releases Beer from Hose | cell 3 | cell 4 | cell 6 | cell 8 | cell 9 | cell 10 | cell 11 | ||
12.1 | Handle | cell 2 | cell 3 | cell 4 | cell 6 | cell 8 | cell 9 | cell 10 | cell 11 | ||
12.2 | White Plastic Center | cell 2 | cell 3 | cell 4 | cell 6 | cell 8 | cell 9 | cell 10 | cell 11 | ||
12.3 | Spring | cell 2 | cell 3 | cell 4 | cell 6 | cell 8 | cell 9 | cell 10 | cell 11 | ||
12.4 | Cap Seal | cell 2 | cell 3 | cell 4 | cell 6 | cell 8 | cell 9 | cell 10 | cell 11 | ||
12.5 | Hard Plastic Cap | cell 2 | cell 3 | cell 4 | cell 6 | cell 8 | cell 9 | cell 10 | cell 11
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Design for Environment (DFE)
- Highlight findings and opportunities for improvement, indentifying where our competitor has followed guidelines and made good choices.
- In particular, if Congress were to pass a tax on CO2, would this have a significant impact on the cost of production or use of the product?
Mechanical Analysis
- Include mechanical analysis to support quantitative understanding of the product's most critical mechanical aspects. Indluce a free body diagram, and be sure to define all symbols and explain all equations used.
Team Member Roles
- Identify team member roles during this phase and summarize your process. Submit individual peer evaluations to Prof.