49th iso tc184/sc4 meeting industry day
DESCRIPTION
49th ISO TC184/SC4 meeting Industry Day. STEP-NC AP-238 Martin Hardwick STEP Tools, Inc. Finishing. Finishing. AP-203 File. STEP Trans. Path used for Roughing. Path used for Finishing. Path 2 Direct Translation. AP-224 File. AP-238 File. AP-238 Units of Functionality. - PowerPoint PPT PresentationTRANSCRIPT
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INDUSTRY DAY TOULOUSE 2006/06/28 1
49th ISO TC184/SC4 meeting
Industry Day
STEP-NC AP-238Martin HardwickSTEP Tools, Inc.
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Finishing
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Finishing
AP-203File
STEPTrans
AP-224File
AP-238File
Path 2 Direct Translation
Path used for Roughing
Path used for Finishing
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AP-238 Units of Functionality•General Process Description
– Project– Executable– Operation– Toolpath
•Product Description– Workpiece, PDM and Product
Geometry– Manufacturing Features– Dimensions and Tolerances– Measures and Part Properties
•Technology Description– Milling Process Operations– Milling Cutting Tools– Turning Process Operations– Turning Cutting Tools
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Workpiece, Shape, and PDM
• Workpiece is a STEP product description
• Has owner information, approvals, dates and times.
• Material and material properties
• Workpiece uses the same STEP shape representations as AP203, AP214, AP224 and other STEP APs.
• Produced by any CAD system that supports STEP.
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round hole
counterbore holecompound feature
pocket withthrough bottom
condition
pocket withflat bottomcondition
slot withradiusends
Machining Features
• 2.5D milling features– Hole, pocket, slot, step, etc
• Transition features– Edge round and chamfer
• Replicate feature– Patterns of repeated features
• Region features– Surfaces for freeform milling
• Turning features– Outer round, knurl, groove
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0.01
0.01
Dimensions and Geometric Tolerances
• Dimensions defining location– Location defined by a linear
distance– Location defined by a
distance along a curve– Location defined by an angle
• Dimensions defining size– Curves, angle, diameter,
radius, thickness, length, width, height
• Geometric characteristics with datums as needed.
– angularity, circular runout, coaxiality, concentricity, cylindricity, flatness, line profile, parallelism, perpendicularity, position, roundness, straightness, surface profile, symmetry, total runout
A0.01
A
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AP-238 Units of Functionality•General Process Description
– Project– Executable– Operation– Toolpath
•Product Description– Workpiece, PDM and Product
Geometry– Manufacturing Features– Dimensions and Tolerances– Measures and Part Properties
•Technology Description– Milling Process Operations– Milling Cutting Tools– Turning Process Operations– Turning Cutting Tools
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executable
nc functionprogramstructure
workingstep
machining workingstep
rapid movement
touch probing
STEP-NC Executables
Program steps that do not move any machine axes(display message, etc.)
Control Flow and Sequencing
Control flow for the machining program
workplan
parallel
if_statement
while_statement
Program steps that movethe machine axes
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INDUSTRY DAY 2006/06/28 10 Diagram WZL RWTH Aachen
Toolpaths
• Used for explicit control of the tool motion for an operation.– Can use splines or other curves to describe motion and feedrates.– Can describe path as machine independent motion of tool center
point or tool contact point.– Can also describe path using old-style machine dependent motion
of individual axis.
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AP-238 Units of Functionality•General Process Description
– Project– Executable– Operation– Toolpath
•Product Description– Workpiece, PDM and Product
Geometry– Manufacturing Features– Dimensions and Tolerances– Measures and Part Properties
•Technology Description– Milling Process Operations– Milling Cutting Tools– Turning Process Operations– Turning Cutting Tools
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Technology Operations• Drilling
– Drilling, boring, back boring, tapping/threading
– Many strategy parameters
• 2.5D Machining– Plane and side milling,
roughing and finishing– Set of strategies
• Freeform Machining– 3, 4, and 5axis motion– Set of strategies
• Turning Operations– Contouring, facing, grooving,
threading and knurling– Set of strategies
A A’ A-A’
Cutter contact point
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Milling and Turning Cutting Tools
• Every operation can have a tool associated.– Calls out required characteristic tool parameters– Potential for some optimization by the controller.
• G&M codes just referenced tool #1, #2, etc.– Human must make sure that #1 corresponds to the right thing.– Controller not able to add any value to the process.
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Benefits
• No more post-processors• Collision detection on the CNC• Rapid re-programming using features• Visual closed loop programming• 30% cycle time reduction
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Data samples
• Made using CATIA, Pro/E and UGS• Milled and Turned parts• Production parts and test parts
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Cell phone cover
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Turned part
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Auto widget
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Cavity mill
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Airfoil
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Boeing Demonstration Part
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Other Demonstrations
• Orlando– CNC independent tool paths Fanuc and Siemens
controls driven by UGS, CATIA, Mastercam and Gibbs data
• Eastec– Visual closed loop programming using Pratt and
Whitney data• US Army
– Feature based programming using AP-224 data• Nokia
– Mold making
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Summary
• STEP-NC is easy to implement– Basic prototype in 4 weeks– Level 2 by adding CAD geometry
• Machining benefits– CNC independent tool paths– Collision detection on the control– Feature based re-programming– Visual closed loop programming
• Enterprise benefits– Long term data retention– Interchange with suppliers