step-nc a new language for cnc machining and measurement martin hardwick step tools, inc....
TRANSCRIPT
STEP-NC a new language for CNC machining and
measurement
Martin Hardwick
STEP Tools, Inc.
518 687-2848 x 306
Why STEP-NC
• New information to make machining faster and more accurate– Supply chain interoperability – On machine feed-speed/tool-wear optimization– On machine simulation and collision detection– Closed loop machining and measurement
CAD CAM CNCDesign Plan Machine
STEP STEP-NC
The STEP-NC Concept
• New programming concepts– Workingsteps define operations– CAD tolerances define quality– CAM tool paths define control
STEP-NC AP-238
AB Tool Tilt BC Table Tilt
The STEP-NC Model
probe
plane milling, side milling, drilling,
workplan, if/then, parallel, …
cutter location trajectory, cutter contact trajectory
pocket, plane, hole, region,
workpiece
S[0:?]
S[0:?]
executable
machining_workingstep
tool
machine functions
strategy
L[0:?]
toolpath
geometrytoleranceproperty
geometry
path geometrycross sectionfeed override
as workpiece,stock, fixture, or tool shape
technology
machining_operation
machining_feature
ISO 13399tool database
How to implement?
• Add STEP export to your CAD systems.• Purchase tools to build STEP-NC data
– Convert APT or MCD data– Integrate with CAD data– Verify machining processes
• Purchase tools to make CNC operation more efficient– Automated feed-speed optimization – Automated measurement– Automated tool path correction
STEP-NC Explorer
CAD
CAM
CNC
STEP-NCExplorer
PDM
• Integrate data from multiple data sources• Optimize machining on the control
“The STEP-NC Explorer is a prototype system for creating, managing and optimizing STEP –NC data”
Impeller Roughing
Impeller - Finishing
Impeller Inspection
Tolerance Evaluation
Simulation
Cutting tools
Control Machining
Business Benefits
• 15% faster machining• TBD% fewer mistakes• TBD% more data reuse• TBD% more accurate machining
New since Sandvik
• Accelerated data reuse using toolpath orientation• As-is, to-be and delta models for executables• AP-203 & ISO 13399 models for cutting tools• More robust graphics• More robust simulation• More viewing options• More export control options
Goals for this meeting
• Show feed speed optimization• Show closed loop machining
– Rough machine– Finish machine one blade– Measure using Faro arm– Generate corrected tool paths– Machine remaining blades– Perform final quality check on CMM– Estimate benefits