relationship of product function with dimensional tolerance student : irfan anjum manarvi...
TRANSCRIPT
Relationship of Product function with Dimensional tolerance
Student : Irfan Anjum Manarvi
Supervisor: Prof. Neal Juster
Presentation sequence
• Nature and scope of research
• Experimental
• Finite Element Simulations
• Analysis of results
• Primary conclusions
• Future direction
Nature and scope of research
• Experimental•Theoretical based on FE
simulations
• Selection of application
ABS plastics deformation under ABS plastics deformation under tolerancetolerance
• Design & Manufacture of test rig for application
• Validity of test rig design• Conduct of experiments
Test Rig and Coordinate measuring Test Rig and Coordinate measuring machinemachine
• Data collection • Analysis of results
Experimental
-8
-7
-6
-5
-4
-3
-2
-1
0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Length x 10mm
Def
orm
atio
n (
mm
)
0.2mm 0.4mm 0.6mm 0.8mm 1.0mm 1.2mm
Fig 1.0 Specimen thickness 0.9mm, tolerance pin diameter 1.0mm
Experimental results
-8
-7
-6
-5
-4
-3
-2
-1
0
0.2mm 0.4mm 0.6mm 0.8mm 1.0mm 1.2mm
Tolerance value (mm)
Defo
rmati
on
mm
1 mm 10 mm 50 mm 100 mm 150 mm 168 mm
Experimental results
Fig 2.0 Comparison of deformation at specific tolerance for 0.9mm thickness specimen with 1.0mm dia pin
FE Simulation
• Model design• Boundary conditions • Mesh formation• Product deformation • Deformation measurement at
specific path
Model Design and Boundary Conditions
Boundary conditions
Mesh generation for analysisElement size 2mm
No. of elements over 5500
Deformation results
Deformation results by FE simulations
-9.0
-8.0
-7.0
-6.0
-5.0
-4.0
-3.0
-2.0
-1.0
0.0
1.0
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37
Nodes along X -axis
Def
orm
atio
n (
mm
)
0.2mm 0.47mm 0.82mm
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Distance along X-axis X 10 (mm)
Def
orm
atio
n (m
m)
FE at 0.2mm FE at 0.47mm FE at 0.82mm
Exp at 0.2mm Exp at 0.4mm Exp at 0.8mm
Analysis of Experimental and FE results at
0.2mm, 0.4mm and 0.8mm tolerance
Primary conclusions• Product function has definite
relationship with dimensional tolerances.
• Research is limited due to requirements of extra ordinary resources for experimentation and data analysis
• FE simulation can be used successfully for simulation of relationship between product function and dimensional tolerances.
• Improve upon existing FE model• To carry out more FE simulations and
analyse results on the bases of experimental data
• Establish sources of errors and minimise differences.
• Move from simple to complex applications
• Evolve strategy for using FE simulations to establish relationship between product function and dimensional tolerances
Future direction of research