T-FLEX Parametric CAD. Fundamentals. 2D Design

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Creating Libraries of Parametric Elements Special functions (WARN and ERROR) are provided in T-FLEX CAD for prompting the user about errors when variables take certain inadmissible values, and request inputting different value. For example, if a nonspecified bolt length is encountered, you can force the message: “The input bolt length is not standard”. This is done by calling the function: WARN(“The input bolt length is not standard”). Once the necessary variables are created, you can proceed with creating the drawing and the 3D model. Creating Parametric Drawing and 3D Model When using a library element is a fragment, it is often necessary to insert just a portion of the drawing. Anticipating that, you can predefine several new layers. Use descriptive layer names to make it easy to understand which portion of the drawing belongs to which layer. In our example, we need to create three new layers. Let's name the layers according to their purpose: front view, left view and top view. During creation, all elements can be placed on any layer, for example, on the layer “Main”. Once the drawing is ready, simply select the desired portions by box and modify the layer of those elements as desired. Some elements of the bolt (for example, the pin hole) may or may not be displayed, depending on the implementation. At the previous step, we created special variables for this purpose. The variable imp25 is equal to 0 whenever the implementation is equal to “2 - with pin hole” or “5 - with pin hole and groove”. In any other implementation, the variable is equal to -10. If an element is to be displayed only in the implementation 2 or 5, its level must be defined by the variable imp25. To make sure that in the assembly drawing the bolt is properly displayed in the bolted joints, to each view of the drawing let us add hidden hatches with the activated option of suppressing the hidden lines. Upon completing the 2D drawing, proceed with the 3D model. Suppose, your 3D model is required to undergo changes depending on some parameter. It is not solely the model dimensions that could change. Some features may appear or disappear in the model. In our example, such a feature is the pin hole. The easiest way to achieve this is by suppressing a certain operation. This can be done using the same variables as when defining the level of the respective features on the drawing. What exactly can be done in this case? The pin hole is created as follows. First, an extrusion was made, creating a cylinder. Next, a Boolean subtraction was done of the cylinder from the bolt stem. The extrusion 711
Fundamentals. Two-Dimensional Design 712 operation can be suppressed as follows. Among the “Extrusion” operation properties, assign the parameter “Suppress” to the variable imp25. The extrusion operation will be suppressed when the variable is not equal zero (that is, when the implementation is not equal 2. To avoid a system error when creating a Boolean with an empty member, set the flag “Allow missing operand” among the Boolean parameters. On the resulting body of the bolt the user should put a thread. To achieve this, let us use the command “3AT: Create thread”. The drawing and the 3D model of the future library element are completed. Next, let us create fixing vectors and the special coordinate system for fixing the created document in the assembly drawing. They will be used for inserting the given document as a fragment into the assembly. Creating Fixing Vectors and Coordinate System for Fixing Fragment in Assembly In our case, the fixing vector will be used when the library element is inserted as a 2D fragment into the assembly drawing. To use it as a 3D fragment, it is necessary to create a special local coordinate system (3D analog of the fixing vector) which will be used for fixing the fragment in the 3D assembly model. For our drawing of the bolt let us create several fixing vectors, each for inserting a certain layer. Among the created vector properties, the flag is checked “Draw only marked”, and the layer is marked that should be displayed upon the insertion. The same vector names as the layer names are used for clarity. On the 3D model of the bolt, let us create LCS for fixing a 3D fragment. The position of the fixing vectors and the coordinate system is determined by the main surface (the contact surface between the bolt and other parts). This is the surface of the bolt head base. When inserting a fragment, the contents of the fragment folder are displayed in the left portion of the coming up dialog box. If the flag is set “Show icons”, then the drawing slides (icons) are displayed next to the file names. We recommend creating slides for the drawings, to insure easy selection for assembling.
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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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Databases Name of the field. Define
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Databases argument_3 - the search o
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Save Database As External Keyboard
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Duplicate Keyboard Textual Menu Ico
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Databases decides what function to
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Control Elements. Creating User Def
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Use of the Dialog Control Elements.
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Parametricity of Custom Dialogs Con
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Control Elements Modification Contr
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The option calls the property windo
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Optimization The tolerance value de
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The example presents a kinematic sy
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Optimization After specifying the o
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Basic Fundamentals and Concepts of
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Let's review hidden line removal on
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List of Commands Used in Assembly D
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«BOTTOM-UP» DESIGN «Bottom-Up»
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«Bottom-Up» Design When creating
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«Bottom-Up» Design Initially, a n
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«Bottom-Up» Design As a result, t
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«Bottom-Up» Design The following
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«Bottom-Up» Design and allow open
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«Bottom-Up» Design In this case t
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«Bottom-Up» Design 3. Upon insert
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«Bottom-Up» Design With this type
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«Bottom-Up» Design It is possible
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«Bottom-Up» Design picture, other
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«Bottom-Up» Design Section “Pre
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Managing Fragments in Assembly Cont
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The option brings up the dialog box
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Editing Fragments In some cases, th
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Editing Fragments A detail drawing
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Editing Fragments The common variab
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Bill of Materials Working with BOM
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Bill of Materials Attention: the ch
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BOM Composition Any BOM is composed
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The icons for managing the list ele
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Bill of Materials The table on the
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Creating BOM on New Drawing Page or
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Switching Between the Assembly and
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Bill of Materials To reorder the gr
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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 762 Use of t
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