Siemens NX 8Design FundamentalsJaecheol KohONSIA Inc.ONSIA
Siemens NX 8 Design FundamentalsSiemens NX 8Design FundamentalsA Step by Step GuideISBN-10: 1482760827ISBN-13: 978-1482760828Author: Jaecheol KohPublisher: ONSIA Inc. (www.e-onsia.com)E-Mail: jckoh@e-onsia.comCoypright 2013 by Jaecheol Koh, ONSIA Inc.All rights reserved.No part of this book may be reproduced or transmitted in any form or by any means, electronic ormechanical,including photocopying, recording, or by any information storage or retrieval system, withoutprior permission in writing from the publisher.The files associated with this book or produced according to the steps in this book remain the intellectualproperty of the author. The files are permitted for use by the original legal purchaser of this textbook and maynot be transferred to any other party for presentation, education or any other purposes.ii
Download Files for ExercisesVisit our homepage www.e-onsia.com. You can download the files for exercises without anylimit. This textbook is written in NX 8.0 and the files are available in NX 6.0. Users of earlierreleases can use this textbook with minor modifications.iii
Siemens NX 8 Design FundamentalsDownload Files for ExercisesVisit our homepage www.e-onsia.com. You can download the files for exercises without anylimit. This textbook is written in NX 8.0 and the files are available in NX 6.0. Users of earlierreleases can use this textbook with minor modifications.iv
PrefaceThis textbook explains how to create solid models, assemblies and drawings using Siemens NX 8.0. NX is a three dimensional CAD/CAM/CAE software developed by Siemens PLM Software Inc., Germany. This textbook is based on NX 8.0. Users of earlierreleases can use this book with minor modifications. We provide files for exercises viaour website. All files are in NX 6.0 so readers can open the files using NX 6.0 and laterreleases.It is assumed that readers of this textbook have no prior experience in using Siemens NXfor modeling 3D parts. This textbook is suitable for anyone interested in learning 3Dmodeling using Siemens NX.Each chapter deals with the major functions of creating 3D features using simple examples and step by step, self-paced exercises. Additional drawings of 3D parts are providedat the end of each chapter for further self exercises. The final exercises are expected to becompleted by readers who have fully understood the content and completed the exercisesin each chapter.Topics covered in this textbook- Chapter 1: Basic components of Siemens NX 8.0, options and mouse operations.- Chapter 2: Basic step by step modeling process of NX 8.0.- Chapter 3 and 4: Creating sketches and sketch based features.- Chapter 5: Usage of datums to create complex 3D geometry.- Chapter 6: Additional modeling commands such as fillet, chamfer, draft and shell.- Chapter 7: Modification of 3D parts to take advantage of parametric modeling concepts.- Chapter 8: Copying features, modeling objects and bodies.- Chapter 9: Additional modeling commands such as trim body, tube, sweep along guide,emboss and various commands in synchronous modeling.- Chapter 10: Advanced sketch commands.- Chapter 11: Measuring and verifying 3D geometries.- Chapter 12 and 13: Constructing assembly structures and creating or modifying 3D partsin the context of assembly.- Chapter 14 and 15: Creating drawings for parts or assemblies.v
Siemens NX 8 Design FundamentalsThis page left blank intentionally.vi
ContentsChapter 1 Starting NX1.1 Introducing NX21.2 Versions of NX31.3 Executing NX41.4 User Interface of NX51.5 Roles101.6 Mouse Operations101.7 View Popup Menu181.8 Customer Defaults241.9 Tolerance26Chapter 2 Modeling Process with NX2.1 Terms and Concepts302.1.1 Three Dimensional Modeling302.1.2 Feature Based Modeling302.1.3 History Based Modeling312.2 Introduction to NX 8 Modeling Process332.2.1 Creating a Part File332.2.2 Taking Out the Sketch in the Task Environment Icon342.2.3 Creating the First Sketch362.2.4 Extruding the Sketch452.2.5 Creating the Second Sketch472.2.6 Extruding the Sketch492.2.7 Rounding Edges502.2.8 Hollowing Out the Solid Body532.2.9 Subtracting with a Cylinder552.3 Summary of the Modeling Process57vii
Siemens NX 8 Design FundamentalsChapter 3 Sketch3.1 Introduction603.2 Creating a Sketch61Exercise 01613.3 Deleting a Sketch Feature633.4 Sketch Procedure633.4.1 Defining the Sketch Plane633.4.2 Creating Sketch Curves643.4.3 Constraint643.4.4 Finish the Sketch64Exercise 02653.5 ProfileExercise 0367683.6 Snap Point Option723.7 Constraining Sketch Curves733.8 Status of Constraint763.9 Evaluating Sketch Status by Dragging78Exercise 043.10 Deleting and Modifying Sketch Objects79843.10.1 Deleting Sketch Feature or Objects85Exercise 0585Exercise 0688Exercise 07913.11 Other Sketch Commands923.11.1 Quick Trim923.11.2 Fillet933.11.3 Mirror Curve94Exercise 0895Exercise 0997Exercise 1098Exercise 1199Exercise 12101Exercise 13102viii
3.12 Reference Dimension and Curve105Exercise 141073.13 Direct Sketch109Exercise 15115Exercise 16116Exercise 17117Exercise 18119Chapter 4 Creating 3D Geometry4.1 Introduction to Extruding1224.2 Understanding a Section1234.2.1 Condition of a Section1234.2.2 Inconsistent Sections1244.3 Selection Intent1264.3.1 Curve Rule1264.3.2 Stop at Intersection1274.3.3 Follow Fillet1274.3.4 Chain within Feature127Exercise 011284.4 Boolean Option1344.4.1 Unite1354.4.2 Subtract1354.4.3 Intersect1354.4.4 None1364.4.5 Boolean Operation Between Bodies136Exercise 021384.5 Sketch Coordinate System1424.6 Direction Option of Extrude1434.7 Limit Option1444.7.1 Symmetric Value1444.7.2 Until Next1454.7.3 Until Selected146ix
Siemens NX 8 Design Fundamentals4.7.4 Until Extended1474.7.5 Through All1484.8 Other Options in Extrude Command1494.8.1 Draft1494.8.2 Offset149Exercise 031504.9 Editing Object Display1514.10 Revolve1524.10.1 Section and Axis of Revolve4.11 Creating Holes1531564.11.1 General Type Holes1574.11.2 Threaded Type Holes158Exercise 04159Exercise 051644.12 Creating a Boss165Exercise 06165Exercise 07170Exercise 08171Exercise 09172Exercise 10173Exercise 11175Exercise 12177Chapter 5 Datums5.1 Datums1805.2 Datum Plane181x5.2.1 Usages of a Datum Plane1825.2.2 Types of Datum Plane184Exercise 01184Exercise 02187Exercise 03189Exercise 04194
Exercise 05197Exercise 062005.3 Point2025.3.1 Output Coordinates2025.3.2 Offset2035.3.3 Associative Option2035.4 Datum Axis2045.4.1 Characteristics of a Datum Axis2045.4.2 Usages of Datum Axis2055.4.3 Types of Datum Axis206Exercise 07207Exercise 082115.5 Datum Coordinate System214Exercise 09216Exercise 10217Exercise 11219Exercise 12221Exercise 13223Chapter 6 Additional Modeling Commands - Part I6.1 Detail Modeling2266.2 Edge Blend2276.2.1 Types of Edge Blend228Exercise 01229Exercise 022316.2.2 Shape Option233Exercise 032346.2.3 Guideline for Applying Edge Blend239Exercise 04240Exercise 05241Exercise 06243Exercise 07244xi
Siemens NX 8 Design FundamentalsExercise 086.3 Chamfer2452486.3.1 Procedure2486.3.2 Cross Section Option2496.3.3 Offset Method2516.4 Draft2546.4.1 Types of Draft256Exercise 09257Exercise 10260Exercise 11263Exercise 122656.5 Shell2666.5.1 Reverse Direction2676.5.2 Alternate Thickness268Exercise 13270Exercise 14271Exercise 15272Exercise 16273Exercise 17274Exercise 18276Chapter 7 Parametric Modification7.1 Understanding Parametric Modification2807.1.1 Parent - Children Relationship of Features2807.1.2 Deleting a Feature2827.2 Modifying a Sketch282Exercise 012837.2.1 Changing the Sketch Plane2877.3 Inserting a Feature (Make Current Feature)288Exercise 027.4 Modifying Feature Definition7.4.1 Reselecting Target Objectsxii289292293
Exercise 03294Exercise 042977.5 Reordering a Feature303Exercise 05304Exercise 06308Exercise 07309Exercise 08312Chapter 8 Copy of Objects and Features8.1 Introduction3168.2 Classifying Copy Commands3168.2.1 Source of Copy3178.2.2 Method of Copy3178.2.3 Summary3198.3 Pattern Feature3208.3.1 Linear Type320Exercise 01322Exercise 023258.3.2 Cautions in Using the Pattern Feature Command329Exercise 033308.3.3 Circular Type332Exercise 04333Exercise 053388.4 Mirror Feature3398.5 Mirror Body339Exercise 068.6 Pattern FaceExercise 078.7 Instance GeometryExercise 088.8 Copy and Paste of FeaturesExercise 09340344344346347348349xiii
Siemens NX 8 Design FundamentalsExercise 10352Exercise 11356Exercise 12357Exercise 13358Chapter 9 Additional Modeling Commands - Part II9.1 Trim Body9.1.1 Procedure360Exercise 01362Exercise 023649.2 Tube3669.2.1 Procedure3669.2.2 Output Option3679.3 Sweep along Guide9.3.1 Procedure9.4 EmbossExercise 039.5 Synchronous Modelingxiv3603683683703703739.5.1 Move Face373Exercise 043739.5.2 Resize Blend375Exercise 053759.5.3 Delete Face376Exercise 063769.5.4 Copy Face378Exercise 073789.5.5 Make Coplanar381Exercise 083819.5.6 Linear Dimension383Exercise 093839.5.7 Radial Dimension387Exercise 10387
Exercise 11389Exercise 12390Chapter 10 Advanced Sketch10.1 Intersection Point39210.1.1 Executing the Intersection Point Command39210.1.2 Intersection Point Dialog Box393Exercise 0139410.2 Intersection Curve39610.2.1 Executing the Intersection Curve Command39610.2.2 Intersection Curve Dialog Box397Exercise 0239710.3 Project Curve39910.3.1 Executing the Project Curve Command39910.3.2 Project Curve Dialog Box400Exercise 03400Exercise 0440310.4 Trimming Recipe Curve40610.4.1 Executing the Trim Recipe Curve Command40710.4.2 Trim Recipe Curve Dialog Box407Exercise 0540810.5 Offset Curve41010.5.1 Executing the Offset Curve Command41010.5.2 Offset Curve Dialog Box411Exercise 06411Exercise 07414Exercise 08415Chapter 11 Measurements11.1 Measure Distance11.1.1 Measure Distance Dialog Box418418xv
Siemens NX 8 Design Fundamentals11.1.2 Distance419Exercise 0141911.1.3 Projected Distance422Exercise 0242211.1.4 Length Type42511.1.5 Radius Type42611.2 Measure Angle42711.2.1 Measure Angle Dialog Box427Exercise 0342711.3 Measure Bodies43011.3.1 Executing Measure Bodies Command43011.3.2 Measure Bodies Dialog Box430Exercise 0443111.3.3 Detailed Information433Exercise 05434Chapter 12 Assembly Design I (Bottom-Up Assembly)12.1 Introduction44012.2 Terms and Definitions44012.2.1 Component44012.2.2 Master Part44112.2.3 Sub-assembly44112.2.4 BOM (Bill of Material)44112.2.5 Bottom-up Assembly Design44112.2.6 Top-Down Assembly Design44112.3 Key Functions in Assemblies44212.4 Constructing an Assembly442xvi12.4.1 Creating Assembly File443Exercise 0144312.4.2 Assembly Option44512.4.3 Adding Components446Exercise 02446
12.4.4 Saving Assembly File449Exercise 0345012.4.5 Closing Files45312.4.6 Opening Files454Exercise 0445612.4.7 Using the Assembly Navigator45912.4.8 Moving and Rotating Component460Exercise 05461Exercise 0646212.4.9 Copy of Component46312.5 Assembly Constraints46412.5.1 Fix46512.5.2 Touch/Align466Exercise 0746912.5.3 Center472Exercise 0847412.5.4 Concentric47512.5.5 Other Constraints47512.5.6 Verifying Constraint Status47612.5.7 Showing and Hiding Constraints47712.5.8 Suppressing Constraints47812.6 Reference Set479Exercise 09481Exercise 10485Chapter 13 Assembly Design II (Top-Down Assembly)13.1 Context Control48813.1.1 Closing Component48813.1.2 Opening Component48913.1.3 Make Work Part49013.1.4 Make Displayed Part492Exercise 01493xvii
Siemens NX 8 Design Fundamentals13.2 Interference Check49713.2.1 Types of Interference497Exercise 0249913.3 Referencing Component Geometry50513.3.1 Interpart Link50513.3.2 Selection Scope506Exercise 03507Exercise 0451013.4 Creating a New ComponentExercise 0513.5 Disassembling an AssemblyExercise 0613.6 Additional Assemblies Commands51551652052052413.6.1 Display of Components52413.6.2 Sectioning525Exercise 0752513.6.3 Measuring Mass529Exercise 08529Exercise 09532Chapter 14 Creating Drawing Views14.1 Introduction53614.2 Terms and Definitions53714.2.1 Drawing View53714.2.2 Title Block53714.2.3 Drawing Sheet53714.3 Drawing File14.3.1 Creating a Drawing File53814.3.2 Understanding the Drawing Screen54214.3.3 Saving the Drawing File54414.4 Drawing Sheet14.4.1 Creating a Drawing Sheetxviii538544544
14.4.2 Setting a Drawing Sheet14.5 Drawing View54554814.5.1 Base View54814.5.2 Projected View550Exercise 0155014.5.3 View Style55714.5.4 Section View559Exercise 0256214.5.5 Detail View567Exercise 0356814.5.6 Break-out Section View57114.5.7 Break View572Exercise 0457214.6 View Dependent Edit57614.7 Resizing View Boundary57714.8 Modifying the Master Part and Component Orientation578Exercise 05578Chapter 15 Dimension, Annotation and Assembly Drawing15.1 General Procedure of Creating Drawings58415.2 Creating Dimensions58415.3 Modifying the Dimension Style58915.3.1 Edit Dimension Option Bar58915.3.2 MB3 on Highlighted Dimension59015.3.3 MB3 on the Dimension59015.4 Aligning DimensionsExercise 0115.5 Notes59159259515.5.1 Modifying the Note59715.5.2 Multiple Terminating Objects59815.6 Center Lines15.6.1 Center Mark598599xix
Siemens NX 8 Design Fundamentals15.6.2 Bolt Circle Centerline60015.6.3 2D Centerline60015.6.4 3D Centerline60115.7 Using the Inherit Option602Exercise 02603Exercise 0360615.8 Assembly Drawing609xx15.8.1 Excluding Components in a Drawing View610Exercise 0461115.8.2 Break-out Section View for an Assembly Drawing View615Exercise 0561515.8.3 Disassembled Drawing View617Exercise 06618
6chapterAdditional ModelingCommands - Part IAfter completing this chapter you willunderstand- the types and procedure of Edge Blend.- how to create Chamfer on an edge.- designer’s requirements of Draft.- various types and options of Draft.- how to apply wall thickness by using the Shell command.
Ch 6: Additional Modeling Commands - Part I6.1 Detail ModelingRecall the general modeling process introduced in Section 2.3.1. Create a sketch. Defi ne the sketch plane. Create the sketch curves and defi ne their shape with constraints.2. Create 3D geometry. Create features using the Extrude or Revolve command to add or remove volumes.3. Detail Modeling Complete the model by applying commands such as Edge Blend and Shell thatmodify edges or facesSample ChapterIn this chapter, we will learn commands that are used in the third step.There are four commands that can be classifi ed in detail modeling: Edge Blend, Chamfer, Draft and Shell. Detail modeling commands do not require a sketch. They can beapplied on edges or faces that have already been created.Fig 6-1 Icons for Detail Modeling226
6.2 Edge BlendSharp edges can be rounded with the Edge Blend command which is generally called afillet.Fig 6-2 Before Edge BlendFig 6-3 After Edge BlendEdge fillets are applied to smoothen sharp edges. There are two types of sharp edges.Fig6-4 shows concave edgesAand convex edgesB.Sample ChapterWhen a part has been manufactured, convex edges can damage the parts, resulting in deterioration of product quality. They can even cause injury to people who deliver or handlethe parts.When a load is applied to a part, the stress will concentrate at the concave edges and afracture may initiate from these edges. Using the Edge Blend command, you can createfillets on the concave or convex edges in the 3D model. Some types of fillets are createdinevitably during the manufacturing process and some are required to improve the mechanical performance of the part.BAFig 6-4 Types of Edges227
Ch 6: Additional Modeling Commands - Part I6.2.1 Types of Edge BlendIn NX 8, there are four types of edge blends available as shown in Fig 6-5. General Blend Variable Radius Blend Sample Chapter Setback Blend Limit Blend Fig 6-5 Types of Edge BlendsA setback blend can be applied on vertices where three or more edges meet. You can createa smoother blend on vertices.A limit blend is applied on edges where you cannot create a complete fillet on the edgedue to the complexity of the geometry. An edge blend is limited to a portion of the edgeby specifying the distance from one end of the selected edge.You can also apply blends on an edge with various radiuses at the specified points.228
Creating a General Blend Exercise 01This exercise explains how to create general edge blend.Fig 6-6 Before and After Edge BlendSample Chapter1. Create a new part file and create a blockas shown in Fig 6-7.2. Click the Edge Blend icon in the Fea-ture toolbar.3. Reset the dialog box.4. Select the vertical edge designatedby the arrow in Fig 6-7. You can see theFig 6-7 A Blockpreview of the 5 mm radius fillet as shownin Fig 6-8.5. Delete the Radius 1 value in the EdgeBlend dialog box shown in Fig 6-9 andpress the Enter key. You can see the preview of Radius 1 20 fillet in the graphicswindow. Press the Apply button in thedialog box.The sharp edge is rounded as shown inFig 6-8 Preview of Edge BlendFig 6-9.229
Ch 6: Additional Modeling Commands - Part IFig 6-9 Creating R20 Edge BlendSample Chapter6. Ensure that the Radius 1 value is 20and select the edge designated by the arrow in Fig 6-9.All three edges are selected together asshown in Fig 6-10.Fig 6-10 Preview of Edge Blend7. Press OK in the dialog box. A 20mmradius edge blend is applied on the threetangent connected edges as shown in Fig6-11.8. Close without saving the file.Fig 6-11 Edge Blend CreatedEND of Exercise230
!Curve RuleThe Edge Blend is a command that can be applied on edges. Therefore, the CurveRule is available at the selection step. The reason why the three edges are selectedat the same time in Fig 6-10 is that the default curve rule for Edge Blend is TangentCurves.Fig 6-12 Curve RuleAdd New Set Exercise 02You can define edge blends for several radiuses in a single Edge Blend feature. Let’sSample Chapterlearn how to add a new set of blend radiuses in the Edge Blend dialog box.Fig 6-13 Edge Blend to Create1. Create a new part file and create a blockas shown in Fig 6-14.2. Click the Edge Blend icon in the Feature toolbar.3. Reset the dialog box.4. Enter 20 in the Radius 1 input box andpress the Enter key.Fig 6-14 A Block5. Select the vertical edge designated bythe arrow in Fig 6-14.231
Ch 6: Additional Modeling Commands - Part IA 20 mm radius edge blend is previewedas shown in Fig 6-15.6. Expand the List area of the dialog boxby clicking the title as shown in Fig 6-16.7. Click the Add New Set icon as specified by the arrow in Fig 6-16. The edgeFig 6-15 Preview of Edge BlendClickblend is defi ned in the List area.Sample ChapterFig 6-16 Add New Set OptionFig 6-17 Edge Blend Defi ned8. Enter 10 in the Radius 2 input box and press the Enter key.9. Select the two edges designated byAin Fig 6-18.10. Press OK in the dialog box. The edge blend is created as shown in Fig 6-13. Onlyone edge blend feature is recorded in the Part Navigator as shown in Fig 6-19.11. Close without saving the file.AFig 6-18 Edges to SelectFig 6-19 Part NavigatorEND of Exercise232
!Quiz!Why is the Tangent Curves curve rule not applied when selecting edges in Fig 6-18?Answer: The edge blend of radius 20mm is not created yet but it is just a preview.Therefore, the two edges are not tangent connected.6.2.2 Shape OptionThe shape option defines the sectional shape of the blend surface. While the Circular typegenerates a constant curvature surface along the section line, the Conic type generates avariable curvature surface.Sample ChapterFig 6-20 Curvature of Circular TypeFig 6-21 Curvature of Conic TypeIf you choose the Conic type in the Shape option, other options are changed to define thevariable curvature fillet.Fig 6-22 Options for Conic Blend233
Ch 6: Additional Modeling Commands - Part IExercise 03 Variable Radius Edge BlendLet’s learn the process of applying a variable radius edge blend.Fig 6-23 Before and After Variable Radius Edge Blend1. Create an arbitrarily named part file andcreate a block feature.Sample Chapter2. Apply an R20 edge blend as shown inFig 6-24.3. Click the Edge Blend icon again.4. Select the edges to apply the blend byclicking the edge designated by the arrowin Fig 6-25.Fig 6-24 A Block5. Expand the option group by clicking
mens NX 8.0. NX is a three dimensional CAD/CAM/CAE software developed by Sie-mens PLM Software Inc., Germany. This textbook is based on NX 8.0. Users of earlier releases can use this book with minor modifications. We provide files for exercises via our website. All files are in NX 6.0 so re
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1. Select the Siemens NX option on the Start menu or select the Siemens NX icon on the desktop to start Siemens NX.The Siemens NX main window will appear on the screen. 2. Select the New icon with a single click of the left- mouse-button (MB1) in the Standard toolbar area. The File New dialog box will appear on the screen
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