Advanced Sheet Metal Design Using NX Cad Challenge_5_Odd Shaped Enclosure

Modelling of odd shaped encloser in Siemens PLM NX 12

By

Santhoshsivan.G

Introduction

In this model, we learn how to create odd shaped encloser model on siemens PLM NX 12 by using some tools like datum, jog, Bend, unbend, bead, extrude, etc.

This are the following tools use to create casing model.

1. Datum
2. Rebend
3. Unbend
4. Sheet metal from solid
5. Flange
6. Bead
7. Hole
8. Jog
9. Flat pattern
10. Extrude

Step by step procedure to creating this model as shown in flowchart.

1.Datum coordinate system:

Datum coordinate system is the base plane for creating the components, which means the objects are created relative to some aspects, such as point, plane or axis. In this system have three categories. They are,

• Machine coordinate system
• Absolute coordinate system
• Work coordinate system

In machine coordinate system mainly used for CAM. CAM stands for computer aided manufacturing which means it’s used in this sectors CNC, VMC, etc.

In absolute coordinate system means to define a parametric location for an object such as point, or centre of an arc. In absolute coordinate system does not change or move. It provides a fixed point in space from which to begin modelling

In work coordinate system means the object is still used to determine the orientation and the origin. In WCS is moved nothing else go with it.

2.Ubend:

Unbend means to flatten the model of concerned plane of the sheet metal. To select the command by selecting menu-->Insert-->form-->unbend. Select the face on the sketch and drag for select the sketch and click ok.

3.Bead:

Bead is nothing but it similar to punch and dimple. By creating the bead select the sketch and click Home-->Punch-->Bead on ribbon bar.After that bead propertie manager appears, then give the value (depth,radius,etc) then click ok or apply.

4.Hole:

To drill standard-size drill size hole to parts in Siemens NX, you need to click on the Hole command as shown by red arrow above. After entering to the Hole command in Siemens NX, you need to select the Drill Size in property manager and click ok.

5.SM Conversion (Sheet metal from sloid):

Sheet metal from solid means convert solid or dump body into sheet metal part of uniform thickness and also that we can use the sheet metal options such as bend, unbend, flattering and some other function after converting solid body into sheet metal. Select the sheet metal from solid option and select the faces after that select select the edge for bend in SM property manager and click ok.

6.Flange:

Flange means to create abend between two walls. The flange ca only be made on a straight edge. By creating flange select menu-->Insert-->Band-->Flange. In flange they are three types is there as following below.

7.Rebend:

Rebend is nothing but to bend the model after unbending. Click the rebend icon and select the faces or simply drag the sketch for selection. After selection click ok.

8.Jog:

It means to create an offset or a step in a tab, you can use small jogs to provide clearance or rigidity to a part may consist of single line across a planar face. NX crates jog by lifting material on one side of the jog line or adding flange between two sides.

9.Extrude:

Extrude means to create a feature from the sketch by adding the material along the direction normal to the sketch or any other specified direction. Click the extrude icon and select the sketch for extrude. Give required values in that property manager and click ok.

10.Flat pattern:

Flat Pattern means create a 2D representation from 3D sheet metal part. Click flat pattern option and select the face and select the sketch by dragging it. And click ok.

Modelling of odd shaped encloser:

Modelling the odd shaped encloser, they are some commands are used for complete the encloser model. Flow chart shows the process and how to create this in step by step

First select the sketch and create it. After creating the sketch select the extrude option and give the required values in the property manager note that select the vector for extrude and sheet metal conversion. Then click ok.

Click sheet metal from solid option for sheet metal conversion. Select the faces in that extrude and select the cornets for creation smooth bends and clock ok.

After converting the sheet metal click flange option. Select the one of its edges for creating flange. In that property manager give required values, angle and some other entities and click ok.

Then sketch the horizontal line (create it little slight to the corner of the model or plane) for bead. Unbend the model by select the face or plane and drag, then click ok. Use bead option to create the punch or dimple, select the sketch and give depth, radius and some other entity in the property manager and click ok.

Before creating beads in that sketch create jog by create sketch and click job option. In that property manager select the line and give the direction for creating jog and click ok.

Then draw the point for creating hole. After the sketch click hole option in ribbon menu and select the point then give the radius value and depth limit and click ok.

Rebend after creating the holes by selecting the rebend option and select the sketch, click ok. Finally create a flat pattern for encloser

Click the flat pattern option and select the face after that drag the sketch and click ok. Note: By change the line colour or modifying the details by using this command click menu-->preference-->sheet metal. In that property manager click flat pattern display for modify the content (hide or show) and also for modifying line colour.

Odd shape encloser Model:

Flat pattren:

2.Modelling of odd shaped encloser:

Front view:

Right side view:

Top view:

Isometric view:

History tree:

Flat pattern: