#SEU12 - 403 introduction to sheet metal modeling - chris dayton

#SEU12

Intro to Sheetmetal Modelling Ganapathy Kunda

Product Manager

Sheetmetal, Sketching & Modelling Technology

© Siemens AG 2012. All Rights Reserved.

Siemens PLM Software Page 2

Gan Kunda – Product Manager

Background

Product Manager ST6 to …….

Sheetmetal

Modelling Technology

Sketching & Planes

2 years in Planning– ST4 to ST5

Modelling Technology

15 years in Development – V2 to ST3

Synchronous Technology

Surfacing

Part, Sheetmetal, Frames, Harnesses………

Areas of Expertise

Synchronous Modelling

Surfacing

Sheetmetal



Topics

Solid Edge Sheetmetal - Introduction

Sheetmetal Features

Defining Gage

Defining Bend Properties

Creating Sheetmetal in Part (ST5)

Overriding Sheetmetal Properties (Ordered)

Overriding Sheetmetal Properties (Sync)

Bending

Flat lengths

What is Neutral Factor (K-Factor)?

Defining Neutral Factor in SE

Transforming regular parts to Sheetmetal

Etch & DXF

Sync Sheetmetal – Why & When?

Ordered Sheetmetal – Why & When?

Want more?



Solid Edge Sheetmetal - Introduction

Dedicated document type (.psm)

Dedicated environments

Modelling (Synchronous & Ordered)

Creation of Sheetmetal model with dedicated Sheetmetal commands

Flatten

Create flat patterns for drawings with bend centerlines

Simplify

Simplify Sheetmetal models for large assemblies

Demo



Sheetmetal Features

Advanced features

Contour Flange

Lofted Flange

Hem

Deform features

Dimples

Louver

Drawn cutouts

Beads

Gusset

X-Brake

Etch

Supporting features

Insert Bend

Unbend

Re-bend

Jog

Detailing features

Holes

Slots (ST5)

Cuts

Normal Cuts

Break Corner

Corners

2 bend corners

3 bend corners



Defining Gage

Material

Application->Properties->Material Table->Material Tab

Gage

Application- >Properties->Material Table->Gage Tab

Demo



Defining Bend Properties

Bend Radius

Application- >Properties->Material Table->Bend Radius

Tools->Variables->BendRadius

Bend Relief

Application- >Properties->Material Table->Relief<Width/Depth>

Tools->Variables-> Relief<Width/Depth>

Demo



Creating Sheetmetal in Part (ST5)

Creating Sheetmetal parts in Part documents

Typical usage

Change in design intent i.e., starts as regular part but it needs to be a Sheetmetal part now

Translated parts

ST5

Commands

Switch to Sheetmetal – Enabled in ST5

Add Body feature – New in ST5

Behaviour

Document type is unchanged i.e., still a Part document

Sheetmetal properties added to the Part document

Sheetmetal environment activated

Sheetmetal parts can be created and edited like in native Sheetmetal documents

Demo



Overriding Sheetmetal Properties (Ordered)

Bend parameters (Radius and Bend relief) can be overridden locally

Feature->Options

Demo



Overriding Sheetmetal Properties (Sync)

Bend parameters (Radius and Bend relief) can be overridden locally

Bend->Bend Handle->Options

Demo



Bending

Bending causes the inside surface to be compressed and outside to be

stretched.

In practice what this means is that using the bend arc length on either layer face for determining the flat length will be incorrect.

Or using the plate lengths including the bends will also result in incorrect flat length

Or what happens when you create a bend on a flat?

-Use outer layer lengths 191.42

-Use inner layer lengths 175.71

-Use just plate lengths up to bends 200.00

Demo



Flat lengths

Computation of flat correct lengths involves accounting for the material transition during the bending process.

The constants are the tab lengths either to the inside of the bend or to the outside of the bend

Bend allowance (BA)

PI * (inside bend radius + neutral factor * material thickness) * bend angle/180

Bend deduction (BD) = 2 * outside set back – Bend Allowance

Flat length = A + B – Bend Deduction

Flat length = C + D + Bend Allowance

http://en.wikipedia.org/wiki/Bending_(metalworking)




What is Neutral Factor (K-Factor)?

Between the inside and the outside surfaces, there is a layer which is neither compressed nor stretched. This is known as the neutral layer.

Neutral factor helps determine the location of the neutral layer.

Neutral factor depends on bend radius, bend angle, ambient temperature, direction of material grain, bending methods etc.

Neutral layer helps determine the correct length of bend.

References: Wiki Article, look at the references section in the article for more details




Defining Neutral Factor in SE

Neutral Factor

Application- >Properties->Material Table->Gage Tab

“Use Excel File”

Users can use “Gagetable.xls” to define their own materials, bend radii, bend reliefs and also neutral factors for various bend radii and bend angles.

“Bend Equation group”

Users can define their own neutral factor through a VB program

Tools->Variables->Neutral Factor

Neutral factor can also be defined for each individual bend in Sync or per feature in Ordered

Demo



Transforming regular parts to Sheetmetal

Typical workflow

Translated Parts

Need to flatten or change thickness

Change in requirements

Starts as Part and needs to be Sheetmetal now

Feature(s)

Transform to Sync Sheetmetal (Ordered/Sync)

Transform to Sheetmetal (Ordered)

Automatically adds bends

Option to rip the model

Cut

Users can custom rip the part

Note

Transform commands are enabled in Part documents from ST5

If in Part and want to work in Ordered, Transition to Ordered, Switch To Part and then run Transform to Sheetmetal command

Demo



Etch & DXF

General guide lines for creating text on SE models

Always use Solid Edge Stencil or Stencil font

Prefer Etch instead of creating a SE feature to add or remove material

Etch is lighter by nature as it does not modify the solid

Translating to DXF

Application->Save->Save As Flat

By default the file type is set to DXF format

Go into Options dialog

Set the option to “Export Etch text as text box” to post process in AutoCAD the text box to stick type font

Go into Font Mapping tab on Options dialog and ensure that the stencil font is mapped to one of AutoCAD’s stick font e.g., txt.shx, monotxt.shx

Ensure that in Sesmf.ini file the following entry is present under [Write Text Fonts] – “Solid Edge Stencil=txt.shx”

AutoCAD – Converting text boxes to stick type font

Use AutoCAD command - Express Tools\Modify Text\Explode

Demo



Sync Sheetmetal – Why & When?

The Why?

Easy creation

Easier edits

Multiple flange creation

Easy creation of straight break bends

Individual bend control

Non-orthogonal plates/tabs

Translated parts

Transform to Sync Sheetmetal command to creates native tabs and flanges

Can change thickness and bend radii values

And a lot more…….

The When?

Straight break bend parts

Start with Tabs, Flanges and holes

Graduate towards Contour Flanges, Patterns, Mirror

Remember Hybrid

Demo



Ordered Sheetmetal – Why & When?

Ordered

Rolled Parts

Lofted Flange

Arcs to lines and vice-versa

Contour Flange along arcs

Unbend/Re-bend

Smart Cuts (cuts across bends)

3 bend Corners

Holes on bends

Features across bends

Creating Part features

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Want more?

What: A hand on experience

Where: Governor’s Ballroom C

When: 10:30 AM to 12:30 AM

Who: Doug Stainbrook

#SEU12

Thank You! Questions?

Date post:	17-Jun-2015
Category:	Technology
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