Sheet Metal Design User Guide - John J. Jacobs

1 parametric technology CorporationSheet Metal Design user GuideCADDS 5i Release 12 DOC36784-013 Copyright 2001 parametric technology corporation . All Rights documentation from parametric technology corporation (PTC) is subject to copyright laws of the UnitedStates and other countries and is provided under a license agreement, which restricts copying, disclosure, anduse of such documentation. PTC hereby grants to the licensed user the right to make copies in printed form ofPTC user documentation provided on software or documentation media, but only for internal, noncommercial useby the licensed user in accordance with the license agreement under which the applicable software anddocumentation are licensed.

2 Any copy made hereunder shall include the parametric technology Corporationcopyright notice and any other proprietary notice provided by PTC. user documentation may not be disclosed,transferred, or modified without the prior written consent of PTC and no authorization is granted to make copiesfor such described in this document is furnished for general information only, is subject to change withoutnotice, and should not be construed as a warranty or commitment by PTC. PTC assumes no responsibility orliability for any errors or inaccuracies that may appear in this software described in this document is provided under written license agreement, contains valuable tradesecrets and proprietary information, and is protected by the copyright laws of the United States and othercountries.

3 UNAUTHORIZED USE OF SOFTWARE OR ITS DOCUMENTATION CAN RESULT IN CIVILDAMAGES AND CRIMINAL Trademarks of parametric technology corporation or a SubsidiaryAdvanced Surface Design , CADDS, CADDS hade, Computervision, Computervision Services,Electronic Product Definition, EPD, HARNESSDESIGN, Info*Engine, InPart, MEDUSA, Optegra, parametric technology , parametric technology corporation , Pro/ENGINEER, Pro/HELP, Pro/INTRALINK,Pro/MECHANICA, Pro/TOOLKIT, PTC, PT/Products, Windchill, InPart logo, and PTC of parametric technology corporation or a Subsidiary3 DPAINT, Associative Topology Bus, Behavioral Modeler, BOMBOT, CDRS, CounterPart, CV, CVact, CVaec,CVdesign, CV-DORS, CVMAC, CVNC, CVToolmaker, DesignSuite, DIMENSION III, DIVISION, DVSAFEWORK,DVS, e-Series, EDE, e/ENGINEER, Electrical Design Entry, Expert Machinist, Expert Toolmaker,Flexible Engineering, i-Series, ICEM, Import Data Doctor, Information for Innovation, ISSM, MEDEA,ModelCHECK, NC Builder, Nitidus, PARTBOT, PartSpeak, Pro/ANIMATE, Pro/ASSEMBLY, Pro/CABLING,Pro/CASTING, Pro/CDT, Pro/CMM, Pro/COMPOSITE, Pro/CONVERT, Pro/DATA for PDGS, Pro/DESIGNER,Pro/DESKTOP, Pro/DETAIL, Pro/DIAGRAM, Pro/DIEFACE, Pro/DRAW, Pro/ECAD, Pro/ENGINE, Pro/FEATURE,Pro/FEM-POST, Pro/FLY-THROUGH, Pro/HARNESS-MFG, Pro/INTERFACE for CADDS 5,Pro/INTERFACE for CATIA, Pro/LANGUAGE, Pro/LEGACY, Pro/LIBRARYACCESS, Pro/MESH, ,Pro/MOLDESIGN.

4 Pro/NC-ADVANCED, Pro/NC-CHECK, Pro/NC-MILL, Pro/NC-SHEETMETAL, Pro/NC-TURN,Pro/NC-WEDM, Pro/NC-Wire EDM, Pro/NCPOST, Pro/NETWORK ANIMATOR, Pro/NOTEBOOK, Pro/PDM,Pro/PHOTORENDER, Pro/PHOTORENDER TEXTURE LIBRARY, Pro/PIPING, Pro/PLASTIC ADVISOR,Pro/PLOT, Pro/POWER Design , Pro/PROCESS, Pro/REPORT, Pro/REVIEW, Pro/SCAN-TOOLS,Pro/SHEETMETAL, Pro/SURFACE, Pro/VERIFY, , , Pro/WELDING,Product Structure Navigator, PTCi-Series, Shaping Innovation, Shrinkwrap, The Product Development Company,Virtual Design Environment, Windchill e-Series, CV-Computervision logo, DIVISION logo, and ICEM TrademarksOracle is a registered trademark of Oracle corporation . Windows and Windows NT are registered trademarks ofMicrosoft corporation .

5 Java and all Java based marks are trademarks or registered trademarks of SunMicrosystems, Inc. CATIA is a registered trademark of Dassault Systems. PDGS is a registered trademark of FordMotor Company. SAP and R/3 are registered trademarks of SAP AG Germany. FLEXlm is a registered trademarkof GLOBE trotter Software, Inc. VisTools library is copyrighted software of Visual Kinematics, Inc. (VKI) containingconfidential trade secret information belonging to VKI. HOOPS graphics system is a proprietary software productof, and copyrighted by, Tech Soft America, Inc. All other brand or product names are trademarks or registeredtrademarks of their respective STATES GOVERNMENT RESTRICTED RIGHTS LEGENDThis document and the software described herein are Commercial Computer Documentation and Software,pursuant to FAR (a)-(b) or DFARS (a) and (a), and are provided to the Governmentunder a limited commercial license only.

6 For procurements predating the above clauses, use, duplication, ordisclosure by the Government is subject to the restrictions set forth in subparagraph (c)(1)(ii) of the Rights inTechnical Data and Computer Software Clause at DFARS or Commercial ComputerSoftware-Restricted Rights at FAR , as technology corporation , 140 Kendrick Street, Needham, MA 02494-27148 January 2001 Sheet Metal Design user GuideContents-vTable of ContentsPrefaceRelated Documents _____ xxvBook Conventions _____ xxviWindow Managers and the user Interface _____ xxviiOnline user Documentation _____ xxviiOnline Command Help _____ xxviiiPrinting Documentation _____ xxviiiResources and Services _____ xxixDocumentation Comments _____ xxixIntroduction to Sheet Metal DesignIntroduction to Sheet Metal Design _____ 1-2 Inputs and Outputs _____ 1-3 Details of the Sheet Metal Design Process_____ 1-4 Stages of Processing _____ 1-6 Examples of How to Use SMD_____ 1-7 Example 1_____ 1-8 Example 2_____ 1-9 Options in Creating a Model _____ 1-10

7 Creating a New 3D Model _____ 1-10 Adapting an Existing Model _____ 1-11 Adding Information Required by the Unfolder _____ 1-11 Unfolding the Model _____ 1-12 Contents-viSheet Metal Design user GuideUsing an Existing Uncorrected Development (Flat Pattern) _____ 1-12 Modifying the Uncorrected Development _____ 1-12 Performing Bend Allowance _____ 1-13 Using an Existing Corrected Development _____ 1-14 Modifying the Corrected Development _____ 1-14 Folding or Refolding the Part _____ 1-14 Using SMD in the parametric Environment_____ 1-16 Changing the Parameters of Your Model _____ 1-16 Changing the Geometry of Your Model _____ 1-18 Reusing Part History_____ 1-18 Conventions and General InformationLayout of the Sheet Metal Design user Guide _____ 2-2 SECTION-A _____ 2-2 SECTION-B _____ 2-2 SECTION-C _____ 2-3 The Sheet Metal Task Sets _____ 2-5 Performing Operations _____ 2-6 Checking or Modifying Your Model During the

8 SMD Process _____ 2-8 Inserting Features to Your Model During the SMD Process _____ 2-9 Changing and Verifying Global Settings _____ 2-10 Use of Layers _____ 2-11 Using Converted MEDUSA Models _____ 2-12 Viewing Layers _____ 2-13 Use of Line Types _____ 2-14 Accessing the Sheet Metal Task Set _____ 2-15 Accessing the OLD SMD Task Set _____ 2-18 Order of Using the SMD Options _____ 2-21 Other Useful Menus _____ 2-21 Sheet Metal Design user GuideContents-viiClassic SMD - 3D Models and the UnfolderCreating a 3D Model _____ 3-2 Extracting the Faces of a Thick Model _____ 3-3 Using the Extract Option _____ 3-3 Interactive Selection Method _____ 3-4 Procedure _____ 3-4 Automatic Selection Method _____ 3-5 Procedure _____ 3-5 Preparing a 3D Model for Unfolding _____ 3-6 Requirements of the Unfolder _____ 3-6 Unfolding Solids _____ 3-6 Setting Global Options_____ 3-7 Marking CUT Edges _____ 3-9 Specifying Inside, Middle.

9 Or Outside _____ 3-10 Marking the Datum Face _____ 3-12 Defining a Datum Cplane_____ 3-13 Procedure _____ 3-13 Running the Unfolder _____ 3-15 Viewing the Unfolded Model _____ 3-15 Combined Options _____ 3-15 Interpreting the Unfolded Development _____ 3-16 Handling Curved Surfaces _____ 3-18 Limitations _____ 3-19 Classic SMD - Uncorrected Developments and BendAllowanceOverview of Uncorrected Developments and Bend Allowance ____ 4-3 Creating or Modifying an Uncorrected Development _____ 4-5 The Developed Layer _____ 4-5 Defining a Surface_____ 4-5 Drawing Bend Lines _____ 4-6 Specifying a Datum Face _____ 4-7 Contents-viiiSheet Metal Design user GuideInside, Middle, or Outside _____ 4-7 Numbering Vertices _____ 4-8 Modifying a Development from the Unfolder_____ 4-8 Using Data Imported from a Different System _____ 4-9 The Bend Allowance Process_____ 4-10 Why Dimensions Change _____ 4-10 Methods of Allowing for Bends _____ 4-10 Fold Relief_____ 4-11 Preparing for Bend Allowance _____ 4-13 Input Geometry _____ 4-13 Global and Local Options _____ 4-13 Setting the Global Variables in the.

10 Caddsrc-local File _____ 4-13 Setting the Global Variables in the Bend AllowanceGlobal Variables Property Sheet _____ 4-15 Thickness, Radius, and Bend Allowance _____ 4-16 Setting Up the Thickness or Radius inthe .caddsrc-local file _____ 4-16 Specifying the Thickness Using the Property Sheet _____ 4-17 Specifying the Internal Radius Using the Property Sheet _____ 4-17 Allowing for Bends _____ 4-19 Specifying a Standard Allowance _____ 4-19 Internal Bend Allowance_____ 4-20 External Bend Allowance _____ 4-20 Radial Bend Allowance _____ 4-21 Supplying Criteria for the Calculation of the Allowance _____ 4-21 Preset Options_____ 4-22 Default Neutral Radius _____ 4-22 DIN Neutral Radius_____ 4-23 Explicit Neutral Radius _____ 4-23 user Defined Equation _____ 4-23 Adding an Equation _____ 4-23 Saving Your Equation _____ 4-24 Examples of Constraints _____ 4-24 Default