dfma project
TRANSCRIPT
Pump Tyre
Hirmanto Bin Suib B050710254
Faiz Bin Razali B050710234
Mohd Norazali Bin Zainal Abidin B050810145
PP23
PP10
PP16PP09
PP22
PP21PP18
PP17
PP15 X 2PCSPP11
PP14PP13
PP12
PP20PP03PP02PP01
PP19
PP08PP06
PP05PP04
PP07
Product Tree Structure
FINAL PRODUCT
FINAL PRODUCT
SUB ASSEMBLY 1 SUB ASSEMBLY 1 SUB ASSEMBLY 2SUB ASSEMBLY 2 SUB ASSEMBLY 3SUB ASSEMBLY 3 SUB ASSEMBLY 4SUB ASSEMBLY 4
SUB-SUB ASSEMBLY 1
SUB-SUB ASSEMBLY 1
SUB-SUB ASSEMBLY 2
SUB-SUB ASSEMBLY 2
Assembly Drawing (Current Design)
Assembly Worksheet Analysis (Current Design)
Part Number
No. of Operation
Manual Handling Code
Manual Handling Time (s)
Insertion Code
Insertion Time (s)
Total Operation Time (s)
Theoretical Minimum No. of Parts
Part Name
PP01 1 20 1.80 03 3.50 5.30 1 Outer Cap
PP02 1 03 1.69 01 2.50 4.19 1 Inner Cap
PP03 1 12 2.25 03 3.50 5.75 1 Notch
PP04 1 37 3.55 51 9.00 12.55 1 Nozzle
PP05 1 03 1.69 06 5.50 7.19 1 Collar
PP06 1 04 2.18 38 6.00 8.18 1 Flexible Washer
PP07 1 32 2.70 51 9.00 11.70 1 Lever
PP08 1 22 2.55 00 1.50 4.05 1 Clevis Pin
PP09 1 20 1.80 01 2.50 4.30 1 Knob
PP10 1 03 1.69 00 1.50 3.19 1 Cylinder
PP11 1 01 1.43 00 1.50 2.93 1 Release Valve
PP12 1 22 2.55 00 1.50 4.05 1 Receptacles
PP13 1 22 2.55 01 2.50 5.05 1 Pivotal Pin
PP14 1 04 2.18 00 1.50 3.68 1 Flexible Washer3
PP15 2 04 2.18 00 1.50 7.36 1 O' Ring
PP16 1 03 1.69 00 1.50 3.19 0 Gas Inlet
PP17 1 03 1.69 00 1.50 3.19 1 Piston Rod
PP18 1 30 1.95 01 2.50 4.45 1 Connector
PP19 1 30 1.95 00 1.50 3.45 1 Flexible Hose
PP20 1 04 2.18 00 1.50 3.68 1 Flexible Washer2
PP21 1 32 2.70 00 1.50 4.20 0 Foot Stand
PP22 1 09 2.98 38 6.00 8.98 0 Connector Pin
PP23 1 27 3.38 08 6.50 9.88 0 Head Tap Screw M3
Total 130.49 19
Total number of parts is 24The manual design efficiency is given by EM = 3 x (19/130.49)=41.38%
• The as inlet (PP16) could be attached by snap fits to the cylinder (PP10) so the head tap screw (PP23) can be eliminated.
• The foot stand (PP21) could be combined as one with connector (PP18).
• Providing plastic connector pin (PP22) can be eliminated by combining it with connector (PP18).
Discussion
Assembly Drawing (New Design)
Assembly Worksheet Analysis (New Design)
Part Number
No. of Operation
Manual Handling Code
Manual Handling Time (s)
Insertion Code
Insertion Time (s)
Total Operation Time (s)
Theoretical Minimum No. of Parts
Part Name
PP01 1 20 1.80 03 3.50 5.30 1 Outer Cap
PP02 1 03 1.69 01 2.50 4.19 1 Inner Cap
PP03 1 12 2.25 03 3.50 5.75 1 Notch
PP04 1 37 3.55 51 9.00 12.55 1 Nozzle
PP05 1 03 1.69 06 5.50 7.19 1 Collar
PP06 1 04 2.18 38 6.00 8.18 1 Flexible Washer
PP07 1 32 2.70 51 9.00 11.70 1 Lever
PP08 1 22 2.55 00 1.50 4.05 1 Clevis Pin
PP09 1 20 1.80 01 2.50 4.30 1 Knob
PP10 1 03 1.69 00 1.50 3.19 1 Cylinder
PP11 1 01 1.43 00 1.50 2.93 1 Release Valve
PP12 1 22 2.55 00 1.50 4.05 1 Receptacles
PP13 1 22 2.55 01 2.50 5.05 1 Pivotal Pin
PP14 1 04 2.18 00 1.50 3.68 1 Flexible Washer3
PP15 2 04 2.18 00 1.50 7.36 1 O' Ring
PP17 1 03 1.69 00 1.50 3.19 1 Piston Rod
PP18 1 30 1.95 01 2.50 4.45 1 Connector
PP19 1 30 1.95 00 1.50 3.45 1 Flexible Hose
PP20 1 04 2.18 00 1.50 3.68 1 Flexible Washer2
Total 104.24 19
Total number of parts is 19The manual design efficiency is given by EM = 3 x (19/104.24)= 54.68%