T-FLEX Parametric CAD. Fundamentals. 2D Design

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«BOTTOM-UP» DESIGN «Bottom-Up» Design When using the “Bottom-up” approach, the assembly model design starts from creation of separate assembly elements – fragments. A fragment drawing is originally created as a standalone T-FLEX CAD document. In the process of creation, it is necessary to follow the certain rules that will allow in future to “snap” the fragment to the elements of the assembly drawing. A special mechanism is provided in T-FLEX CAD for correct positioning of the fragment drawings in the assembly − Fixing points or vectors. Such elements should be created in a fragment drawing in advance, before inserting it into an assembly drawing. When inserting a fragment, you need to specify the position of the reference elements in the assembly drawing, which will define the fragment position, orientation and size. The fragment image will be built according to the specified fixing points or vectors. If no attachment elements are created in the fragment drawing, such fragment will be attached to the coordinate system of the assembly drawing page according to its initial coordinates in this page. The position of such fragment can be modified only by editing. To get associated relations between the fragments and the assembly drawing, attached fragments to the nodes of the assembly drawing (including the nodes of other fragments). Ways of Attaching Fragments When designing assemblies by «Top-down» approach, two ways of positioning the fragment on the drawing are primarily used in the T-FLEX CAD system: • Defining fixing vector. In this way, first create the drawing, and then define the necessary number of fixing vectors. Each fixing vector defines the origin and the positive direction of the X-axis of one local coordinate system in the drawing. An arbitrary number of fixing vectors can be defined within a fragment drawing. The fixing vector defines the fragment position and orientation one the assembly drawing and controls elements visibility. • Defining fixing points using variables. In this way, the drawing is created first, following certain rules. The base vertical and horizontal lines are assigned the parameters with the reserved variable names. Upon assembling, the system will identify the intersection point of such lines as a fragment fixing point. Multiple fixing points are allowed. All the rest of fragment constructions are done with respect to the base lines defining the fixing points. The fixing points can define the position, orientation and size of the fragment within the assembly drawing. The main difference between the fixing vector and fixing point approaches is in the sequence of creation steps of the fragment drawing. When using fixing vectors, you need to create the drawing first, and then specify the fixing vectors. When using the fixing points, one has to create fixing points first, and then build the drawing of the part based on the fixing points. There are also differences in the uses of fixing vectors and points. Fragments with fixing vectors are created as follows: first, the image of the fragment is formed, taking into account the visibility layers. Next, the complete image is moved to the specified point and rotated by the specified angle without distortions. Fragments with fixing points are created differently: upon specifying the fixing points, all construction elements dependent on those points are rebuilt first, and then the image of the fragment is obtained. 575
Fundamentals. Two-Dimensional Design 576 This difference in forming the fragment image on the assembly drawing leads to differences that can be illustrated by the following example. Let's create identical fragments with different fixing provisions. Insert these fragments into a drawing, rotated by the same angle. The fragment that uses a fixing vector, exposes a change in the hatch angle, nonstandard dimension placement (with the automatic dimension text orienting functionality disabled), and a changed angle of a text. The fragment that uses fixing points shows the hatch angle preserved, the dimension “10” rotated per the standard, and the text angle maintained as well. Fixing Vector Fixing Points The mentioned differences shall not be considered shortcomings; rather, those are features that can be exploited in certain design situations. Fixing Vectors. Connectors A fixing vector and a connector are auxiliary elements of the model which are used when attaching the fragments. These construction elements are constantly displayed on the screen and can be hidden together with other construction elements by the command “Hide Construction”. Context menu is available for those elements, providing the deletion, editing and property modification commands. To use a fully furnished drawing as a fragment, one needs to create a fixing vector. To prepare the environment for fast “snapping” of other fragments, one needs to create a connector. The connector does not have to be created in the fragment drawing. It can be created in an assembly drawing. Fixing vectors and connectors have different purpose, however, are created in the same command “FV: Construct Fixing Vector”: Keyboard Textual Menu Icon “Construct|Fixing Vector” Upon calling the command, the following options appear in the automenu: Fixing vector properties Create Fixing Vector Create Connector Set Snap Elements Select Node Execute Edit Fixing Vector Command Exit command There are two types of fixing vectors: a fixing vector defined by two points, and a fixing vector defined by one point. Fixing by one point is used for fast attachment of parts whose image does not change under rotations or parts not requiring rotation.
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T-FLEX Parametric CAD FUNDAMENTALS.
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TABLE OF CONTENTS Table of Contents
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Table of Contents “Commands” Ta
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Table of Contents Basic Rules of Gr
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Table of Contents Leader Note Examp
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Table of Contents Creating List of
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Table of Contents Defining Fragment
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Table of Contents Creating a Databa
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Introduction T-FLEX CAD: Features a
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Features and Area of Application lo
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Conventions Adopted in the T-FLEX C
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System Fundamentals. Customization
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T-FLEX CAD System Setup Running Ins
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Service Windows and Elements of Con
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Macros Window Studies Window (only
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To add a tool window to an already
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Getting Started Typically, nodes ar
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Leader Note is a standard element o
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Non-parametric Drawing (Sketch). Th
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Using Left Mouse Button • Pointin
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Getting Started In this volume, any
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Canceling a Command Getting Started
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Getting Started “PS: Show Model P
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BRIEF INTRODUCTORY COURSE Brief Int
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Brief Introductory Course To draw t
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Brief Introductory Course Move the
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Brief Introductory Course Note that
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Another way of creating nodes is us
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Brief Introductory Course dimension
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To explicitly call the text editing
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Brief Introductory Course This comm
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You are still within the segment cr
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Now, let’s construct the left sid
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Brief Introductory Course Click , f
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Line Midpoint Horizontal/Vertical O
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Brief Introductory Course We will s
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Click and move the cursor leftwards
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Brief Introductory Course Next, mov
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Brief Introductory Course Next we n
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MAIN CONCEPTS OF SYSTEM OPERATION D
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Main Concepts of System Operation m
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Main Concepts of System Operation w
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Main Concepts of System Operation L
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Main Concepts of System Operation T
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This window can be floating or dock
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Active Drawing Window The T-FLEX CA
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An alternative way of maximizing a
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2. Tile Vertically. Do this by the
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Additional window of document Main
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Main Concepts of System Operation i
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A system-offered object snap can be
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General Concepts of Editing Element
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The context menu of an element can
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Filter There are several additional
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Main Concepts of System Operation A
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Main Concepts of System Operation C
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Layer Main Concepts of System Opera
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When using a variable for defining
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CUSTOMIZING SYSTEM Customizing Syst
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Load Previous Session Document on S
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Customizing System “Save” Tab A
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“Snap” Tab Customizing System T
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“Folders” Tab This tab is used
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Customizing System The “Scene rot
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Customizing System Additional flag
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Controlling Toolbar Visibility To s
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“Keyboard” Tab This tab defines
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Customizing System To modify alread
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Customizing System The buttons [App
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Customizing System - Mapping of the
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Customizing System Upon pressing th
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CUSTOMIZING DRAWING Customizing Dra
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Customizing Drawing Direction. Defi
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Customizing Drawing “Dimensions
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Customizing Drawing “Alternative
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Customizing Drawing “Preferences
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Customizing Drawing “Colors” Ta
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Customizing Drawing Default truncat
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Customizing Drawing “3D” Tab Th
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Customizing Drawing The command bri
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Libraries Active Configuration. Thi
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Libraries Cut, copy, paste. These c
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Libraries the model menu window is
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Pages Switching pages is done witho
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Pages The quickest way of creating
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Special Handling of Multi-Page Docu
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Fundamentals. Two-Dimensional Desig
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Drawing Editing Moving and Copying
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“Edit|Move|Rotate” “Edit|Mov
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Moving and Copying Drawing Elements
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ELEMENT REPLACEMENT Element Replace
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Element Replacement When using the
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Select the dimension and enter the
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Drawing Modification via Dimensions
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Relations created with the commands
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Relations The created Relations wil
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Variables and Related Parametric To
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Upon creating any variable of the T
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Comment of variable Variables If ne
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Creating Variable In the variables
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Variables The command “New Variab
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Variables the selected section. The
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Variables After calling this comman
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Variables Color. The color of grid
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Variables To activate the mode of g
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Variables Sort parameters are saved
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Variables Upon calling this command
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Editing External Variables Variable
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Call the command “EC: Edit Constr
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Variable Dependency Variables Varia
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Variables Attachment I. Rules for W
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Variables -23 % -5 = -3 23 % -5 = 3
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Variables The angle arguments of tr
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Variables TWORD(“string”, N) Ge
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Variables The detailed description
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LTOT ( 120.34567, 0.001, 1, 5 ) ret
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for text: “WIDTH” - the text wi
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for loop: “AxisX”, “AxisY”,
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Variables One more additional relat
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Variables BOMPAGES - returns the to
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Measure Elements and Relations betw
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Additional Methods of Calling Comma
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Hatches: Text: 3D objects “AREA
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Loops: Measure Elements and Relatio
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GLOBAL VARIABLES Global Variables A
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DATABASES Databases Databases provi
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Page 530 and 531: Save Database As External Keyboard
Page 532 and 533: Duplicate Keyboard Textual Menu Ico
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Page 564 and 565: Basic Fundamentals and Concepts of
Page 570 and 571: Let's review hidden line removal on
Page 574 and 575: List of Commands Used in Assembly D
Page 578 and 579: «Bottom-Up» Design When creating
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Page 596 and 597: «Bottom-Up» Design picture, other
Page 598 and 599: «Bottom-Up» Design Section “Pre
Page 600 and 601: Managing Fragments in Assembly Cont
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Page 604 and 605: Editing Fragments In some cases, th
Page 606 and 607: Editing Fragments A detail drawing
Page 608 and 609: Editing Fragments The common variab
Page 610 and 611: Bill of Materials Working with BOM
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Page 614 and 615: BOM Composition Any BOM is composed
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Bill of Materials “Groups” Tab
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Bill of Materials Standard. Present
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Bill of Materials Substring from en
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Bill of Materials On the main toolb
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To have a BOM row ignored when sett
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Bill of Materials If the icon is in
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BOM Export Bill of Materials For ex
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Creating and Editing BOM Prototype
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Creating prototype for BOM located
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Format Paragraph Parameters of cha
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Bill of Materials Save this file. T
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Two-dimensional design CONVERTING D
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Two-dimensional design Performing C
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Two-dimensional design 760 After co
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Two-dimensional design 762 Use of t
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