Advanced Sheet Metal Design Using NX Cad Challenge_7_ Metal bracket-II

                    Title (‘Designing a Sheet metal Bracket by using Siemens NX-Sheet Metal Application’)

Click to view Project                                                                                                      Shaik_Thasleem_Ansari

Objective: 

The main objective of this project is to design a Sheet metal Bracket by using Siemens NX-CAD  3D software.

Introduction:

NX, formerly known as "Unigraphics", is an advanced high-end CAD/CAM/CAE, which has been owned since 2007 by Siemens PLM Software.[1][2] In 2000, Unigraphics purchased SDRC I-DEAS and began an effort to integrate aspects of both software packages into a single product which became Unigraphics NX or NX.

It is used, among other tasks, for:

Design (parametric and direct solid/surface modelling)

Engineering analysis (static; dynamic; electro-magnetic; thermal, using the finite element method; and fluid, using the finite volume method).

Manufacturing finished design by using included machining modules.

Design methodology:

The above shown flow chart explains about the design methodology of designed sheet metal casing. First we need to create a tab of required dimensions later we have to use some features like Flange, Break Corner, dimple, etc. to design a sheet metal casing.

Features used:

Sketch: This feature is used to draw line, circle, rectangle, etc.

Tab: it is to create sheet metal block of required thickness.

Contour Flange: this feature is used to create flange according to drawn sketch.

Break corner: this feature is used to fillet the sheet metal edges.

Normal cutout: it is used to cut the sheet metal in required sketch.

Gusset: This feature is used to create ribs to the Product (Strength to the product)

Advance Flange: this is used to create Flanges to non-uniform edges

Unbend: this feature is used to unbend the sheet metal.

Rebend: this feature is used to reminds original form of the sheet metal.

DESIGN PROCESS:

Units:

This project has been done using Millimeters as the base unit.

Processes:

Creation of sketch:

The sketch was created on the XY plane. The rectangle tool was used to make the sketch and proper dimensions were added to fully constrain it. In this Siemens NX software, the drawn sketch is automatically constrained, it makes different than other software’s.  This provided the base for the tab feature which formed the next process in this project.

Contour Flanges

Using proper edges as a reference, the corners of the bent faces were modified to include flanges. This was done using the Flange feature.

This feature is used to create extended edges according to the drawn sketch.

Normal Cutout:

A rectangular cutout was then created on one edge of the base feature by using the Normal Cutout feature.

Break Corners:

The sharp corners which remained after the creation of solid features were smoothed using the Break Corners feature which rounded the sharp edges according toa proper radius value.

Unbend:

For the creation of additional features like holes, the bent portions were straightened using the Unbend

feature which was done by the systematic selection of the bent corners.

Adding Gussets:

This feature is used to Generate strength by using some additional features like ribs.

Advance Flange: this is used to create Flanges to non-uniform edges.

Rebending:

The final process consisted of reverting the model back to its original configuration by modifying the unbent edges using the Rebend feature. The path followed while unbending was repeated in a similar manner while rebending to ensure proper result.

Views of Sheet-Metal Casing:

Front View:

Top View:

Isometric view:

Side view:

Flat pattern view:

Detailed Drawing Sheet Image:

Conclusion:

Being a Metal Bracket, it has been used every feature of Sheet metal, A Sheet Metal Bracket has been designed by using simple sheet metal features of siemens NX-CAD software.