Advanced Sheet Metal Design Using NX Cad Challenge_6_Bracket

Advanced Sheet Metal Design Using NX CAD- Bracket Design

Objective:

The main objective of this project is to design a sheet metal BRACKET in NX cad sheet metal application workbench. Also, to perform the drafting for the bracket part.

Software used: NX 12.0

• To design and model the sheet metal casing in NX by using some basic features.

• To learn to create sketches on defined planes as per requirement.

• To master the user interface and basic features of Sheet metal application in NX like Tab, Flange, Break corner, Unbend, Creating holes, Re-bend, Dimple, Bead, Mirror feature, and Flat pattern.

Introduction:

Sheet metal Design and Fabrication:-

# NX sheet metal design software includes material and process information in sheet metal-specific modeling features: bends, flanges, tabs, cutouts, beads, dimples, louvers, corner and edge treatments, patterns and other formable features. You can also quickly convert solid models to sheet metal components, and create sheet metal parts that enclose other components.

# With NX sheet metal CAD tools, you can apply standard values, such as material thicknesses and bend radii, based on industry or company best practices. With folding and unfolding capabilities, you can work with models at any stage of the fabrication process. NX sheet metal software creates accurate flat patterns for documentation and manufacturing.

Design Methodology:

Description:

The sheet metal Bracket has been done with the above flow chart process. While designing the default thickness, bend radius relief depth and relief width value are set to 1mm at the Menu → Preferences → Sheet Metal here you can change the Sheet Metal thickness whenever necessary.

The sketch is drawn in the XY plane and the tab command is used for creating the base of the part.

Explanation and Procedure:

1..Direct Sketch:

We use its tools to create a base sketch. (for eg: Rectangle, Circle, Line, etc.)

2.Contour flange:

In Siemens nx sheet metal contour flange command use to create a base feature by extruding a sketch along a vector, or adds material by sweeping a sketch along an edge or chain of edge.

From the menu: Insert -> Bend -> contour flange.

3.Normal cutout:

Using the NORMAL CUTOUT tool we remove the material from the required location.

4.Break corner:

Break corner and chamfer tools are used to make some changes over sheet metal body. Both the tools provides a different activity in creation of the parts.

Rounds or chamfers a sharp corner of a tab or flange. Here by using this tool we can do two different operations.

One is Forming Bend to part and secondary is Forming chamfer.

Bend: Completely formed with radius and creates smooth edges.

Chamfer: This tool is applicable by distance and creates sharp edges.

Unbend:

As the tool name indicates the bend tool is used to bend the sheet metal bodies and the unbend is viceversa of the bend tool,It is to unbend the bent regions.

Bead:

This tool is used to create a punch formation on the selected region on the body with smooth curvature on the edges.

Also we create circular projections with help of the BEAD command.

Re-bend:

As the tool name indicates the bend tool is used to bend the sheetmetal bodies and the re-bend is viceversa of the bend tool, It is to re-bend the un-bended regions.

Simple hole:

In the siemens nx modeling, hole command use to create a hole on one or more solid bodies in a part or assembly with option for counter-bored, countersunk, and threaded.

siemens nx modeling hole command make position point by point option.

siemens nx modeling hole command make position point by sketch section.

create a Simple hole in nx.

Views:

1.Front view:

2.Top view:

3.Side view:

4.Isometric view:

Drafting:

We can create 2D drawing sheets in NX CAD from the sheet metal component designed. For that we have to follow the process below:

Application >> Drafting >> Base View >> In model view to use - FLAT PATTERN created >> Adjust appropriate scale >> Drawing Sheet formed >> Give Proper Dimensions.

Drawing sheet:

Detailed view:

CONCLUSION:

• Finally the bracket of the sheet metal is designed on the Siemens NX12.0

• The tools and features used for the bracket is learned.