Week 9 Deliverables

Team Highlander3/10/10

Continued Analysis

• Added moment to handle, no significant change in tipping problem

• With a 25 lb weight, wrist generates roughly 4.2 ft-lb of torque

• Original moment was -86.3 ft-lb for the entire frame, so doesn’t effect tipping

Manufacturing Materials

• Handle Bars• Stopper (counter moment)• Linkage arms• Lever• Made with 6061-T6 Aluminum– Same material used on good bicycle frames– Low cost ($4.68/2 ft 3/4 SCH 40 (1.05 OD X .113W)) – High yield stress (400 MPa)

Manufacturing Materials

• Pins and Bolts– Steel, found readily at a variety of locations– Standard sizes used – nothing custom-made

• Handle and lever grips– Silicon, good cushion level and relatively cheap,

easy to mold

Manufacturing - Prototype

• Bars will be shipped as pipes, and will be machined by Team Highlander

• Bolts/Pins purchased at Home Depot• Handle and lever grips– Use bicycle handlebar tape– Good cushion level, high quality, does not require

any sort of injection molding– Costs approximately $20

• Handle bar pivot will be clamped onto the frame

CastingSmall Volume Large Volume

Manufacturing – Final Product1-1,000 Units

• Type of manufacturing used– Handle bars: extrusion (hot)– Handle grips: injection molding– Curved stopper legs: sand casting (or plaster)– Pins/Bolts: sand casting– Lever bars: extrusion (hot)– Lever handles: injection molding– Linkage rods: extrusion (hot)– Lever/handle brackets: sand casting/welding

Manufacturing – Final Product1,000-1,000,000 Units

• Type of manufacturing used– Handle bars: extrusion (hot)– Handles: injection molding– Curved stopper legs: permanent mold casting– Pins/Bolts: permanent mold casting– Lever bars: extrusion (hot)– Lever handles: injection molding– Linkage rods: extrusion (hot)– Lever/handle brackets: permanent mold

casting/machining/welding