Advanced Sheet Metal Design Using NX Cad Challenge_2_Box Assembly

ADVANCED SHEET METAL BOX ASSEMBLY USING NX CAD

Objective

The Aim of this project is to design Sheet Metal Box using Sheet Metal Application in Siemens NX CAD Software

Introduction

• NX Sheet Metal provides a set of tools within the NX design environment that allows for simple and fast design of sheet metal parts, dependent on their material and manufacturing process.
• With NX Sheet Metal, formed and unformed representations of the parts are created closely following the industry workflows and best practices for bending calculations, tooling, and sheet metal features.

DESIGN METHODOLGY

DESCRIPTION

Setting Preferences

After initializing the NX Sheet Metal Application the Sheet Metal Preferences are set to global parameters and saved. This validates the sheet metal and parameters are set for future designs

Base Metal Preparation

• The first step is to create Base Tab with Thickness value as 1mm.
• The Second step is creating Flanges on the edges with Length and Inset Preferences as Inside and Material Inside.
• A Closed Corner is applied which closes the two bends of the adjacent Flanges.

Hemming Enclosure

• The End of the Flanges is designed using Hem Flanges that increases the stiffness by folding edge the sheet metal over on to itself.
• Then Hemming is applied to the Top three edges of the Box that also ensures safe handling.
• Finally the Body is mirrored and the both components are united together.

Creating Dimple and Beads

• The Next phase is to create Dimple on the Flange Faces and Bottom Tab Face.
• Dimple option lifts the area of the model inside the sketch that simulates a stamping tool.
• The Dimple is created on the Flange Length Face and Bottom Tab Face with Inside Depth reference and material protruding outside.
• The Next Step is to create a Bead along the Bottom Face of the Tab that lift the material along the contour of the sketch. A Circular Cross Section is used as Bead Type.

Designing the Lid

• The Next phase is to create a sketch for Box Lid. Then the sketch is used for creating Tab that creates the Lid
• Then Flanges are applied along the edges to create a proper Box Lid Enclosure.

Hinge Design

• The Final phase is to design a Hinge for opening and Closing of Lid.
• After creating Tab and Flanges an Open Loop Hem Flange is designed with inset type as Bend outside.
• The Created Body is Unbend and the Profile Cutout is made and again rebended.

Then the Body is mirrored along the XZ Plane and the part is saved.

Various Model Views of Box Assembly is shown below,

Fig2) Front View of Sheet Metal BOX

Fig3) Side View of Sheet Metal BOX

Fig4) Isometric View of Sheet Metal BOX

Fig 5) Rendered Image

CONCLUSION

Thus a Box is designed using NX CAD Sheet Metal Application and some of the advanced Sheet metal features are honed by applying practically to a sheet metal model.