RP of Sheet Metal using Single Point Incremental.pptx
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Transcript of RP of Sheet Metal using Single Point Incremental.pptx
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RP of Sheet Metal using Single Point Incremental Forming[SPIF]
BY
SUDHEER KUMAR
SAI KIRAN
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CONTENTS
Introduction
SPIF process configurations
Tool path strategies
Adaptive Slicing
Applications
Conclusions
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RP as an ADDITIVE MANUFACTURING 3
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Incremental Sheet Metal Forming[ISMF]
Features
Localised deformation
Increased Formability
Flexible to form complex geometrical shapes
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SPIF process configuration
Negative forming process Positive forming process
a) Without Die
b) With Die
a) Using partial support
b) Using full support
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Negative ISMF process
Where the tool moves in negative Z direction
in incremental steps
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Positive ISMF process
Where a rigid member
support from the bottom
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Other Variants of ISMF processes
Two point incremental sheet metal forming
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Other Variants of ISMF processes 9
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Tool Path Strategies 10
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Tool Path generation
3 tool path generation methods are presented here.
i) Horizontal slicing
ii) Inclined Slicing
iii) Offset method
Tool path always generated starting from outer loop of feature
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Horizontal Slicing
suitable for features with horizontal inner and outer loops.Constant slicing height(∆z) is used
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Inclined slicing
Slicing features with non-parallel outer and inner loops
Planes rotating about an axis are used for slicing
Axis of rotation is intersection of outer loop plane and inner loop plane
Slice thickness is not constant
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Offset method
Tool path for features which can not be sliced because of height smaller than slicing height.
Outer and inner loops are joined with straight lines as shown.
Equal number of equidistant points are generated on each line.
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Slicing Strategies 15
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Cup with inclined hump model 16
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Forming sequence 17
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Different geometrical shapes formed by ISMF
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Applications
Conical geometrical part
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Applications 20
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Applications 21
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Applications 22
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Applications
Complex automotive parts. Amino KK. Japanese company
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Applications 24
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Conclusions
ISMF does not require dies. So changes in the design can be easily and economically incorporated .
Adaptive slicing is possible to attain higher accuracies in the part.
Formability in ISMF is much higher than that of traditional forming processes, and there by complex geometries can be made.
ISMF process is relatively new and emerging field and research need to be done for improving the accuracy and calculation of specific forces required.
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Thank You
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