2006-2007 pittsburg state university mini-baja
TRANSCRIPT
Mini Baja Advisory PresentationMay 2, 2008
Presenter: Mark Bell
Accompanied by Baja Team 83 MemberJerrod Bohannon
Table of ContentsOverview of Competition
Design ConditionsGrading Criteria
Design ConceptsDesign ChangesDrawingsManufacturing AnalysisScheduleFinancial Plan
Design Conditions
Overall length must be a maximum of 108”Overall width must be a maximum of 64”Must be capable of carrying one person 6’3” tall and weighing 250 lbs.Must use Briggs & Stratton 10 hp OHV Intek Model 205432
Grading Criteria
Cost ReportDesign ReportAccelerationBrakingHill ClimbLand ManeuverabilitySpecialty EventsEndurance Race
Frame Design
Design Concepts
Target vehicle weight: 450 lbsForward, neutral, reverse transmission
Design shifting mechanism
Design Changes
Changed frame impact support tubing near firewallModified trailing arm attach pointsAdded tubing to enclose engine within frameRedesigned shock mounts once travel was finalized
Tubing Bender
Tubing Coping
Mig Welding
Waterjet Programming (Master Cylinder Tabs)
Trailing Arm Bearing Housing
Side View of Frame
Bearing Carrier
Routing Sheet
OPERATION NO.
DESCRIPTION OF OPERATION
MACHINE TYPE TOOLING SET‐UP TIME (hr)
OPERATION TIME (hr)
MATERIALS
10 Cut off to length Power Hacksaw .09 .005 .065” wall 1” x 1.5” x 49”
20 Finish grind cut end Grinding wheel Tape Measure to ensure proper length
.02 .06
30 Cut off to length Power Hacksaw .09 .005 .065” wall 1” x 1.5” x 29.5”
40 Cut chopped end to have 15 degree angle
Power Hacksaw .05 .005
50 Finish grind cut end Grinding wheel .02 .06
60 Square up tubing T‐square
70 Fixture with tabs TAC Weld Tabs/screws .04 .01
80 Weld Joints TAC Weld .04 .03
90 Clean up weld beads Hand Grinder .01 .14
100 INSPECTION Tape Measure Angle FinderRight Angle Ruler
.08
Routing SheetCustomer’s Name:
Assembly NAME: Bottom Frame RailsQuantity: 2
Assembly NO: MB_As_83_001
Manufacturing MethodsPrimarily bent tubing with mig welded jointsHeim joint inserts into tubing with mig welded jointsEnd mill used to
Cut keyways in drive shaftsFinish machine front knuckles
Lathe used to turn downPlastic insertsShaftsMachine bearing carriers
Manufacturing Methods cont.Hemsaw to cut rods to lengthDrill press to drill holesTaps to thread holesWater jet
all tabsshock mountsdrive platesoutside front knuckle contourmaster cylinder tabsskid plate
Manufacturing Methods cont.
Set up our own carbon fiber for body panels with help of Plastics Dept.Will have Plastics Dept. support with fabricating a spill pan and guards
Manufacturing Plan – Lower Frame
Cut tubes to lengthCope ends to match other tubingBend tubing at specified lengths and radii anglesTack weld all tubes into placeMeasure to assure the dimensions are correctMig weld all joints to finalize assembly
Manufacturing Problems
Shock MountsHad to redesign for shocks mounting to frameGussets had to be redrawn as well
Front KnucklesMachined inner diameter too big for press fit of spindleRecut knuckles and outsourced for the press fit
Bearing Carrier
Front Impact Analysis
Side Impact Analysis
Rollover Analysis
Schedule
Project Planning.xls
14‐Jan 4‐Feb 11‐Feb 18‐Feb 15‐Feb 3‐Mar 5‐May 29‐MayFrameSuspensionFinish weld chassisNondriving components
Polaris Parts ArriveBody PanelsLights / wiringAssembly of drivetrainMake spill panProtective covers
moving car
PaintGraphicsRoll bar paddingDesign ReportCost ReportCompetition
14‐Jan 4‐Feb 11‐Feb 18‐Feb 15‐Feb 3‐Mar 5‐May 29‐May
Financial Plan
Financial Plan.xls
Mini Baja 07‐08 Financial Plan Fundraising
procurred $ 2,500.00
Registration $ 600.00 potential $ 5,650.00
Transmission $ 120.00
Steel $ 125.00
Polaris $ 1,200.00 Total Needed $ 9,500.00
Partial Total $ 2,045.00 Total Potential Fundraising $ 11,150.00
Total Needed ~ $ 9,500.00
Fundraised $ 5,000.00
Potential Fundraising $ 11,150.00
Total Costs $ 9,500.00
Conclusion
Finish fixing front knucklesFinal steer setup to get car drivingWorking toward finishing the vehicle: painting, carbon fiber panels, wiring, protective covers, graphicsGoing to competitionBe competitive!
Questions?