Box Assembly Design Using Sheet Metal Design by Siemens NX CAD

Deisgn Of Box Assembly

Objective: Design of Box assembly using Siemens NX CAD.

Introduction:

NX, formerly known as "unigraphics", is an advanced high-end CAD/CAM/CAE, which has been owned since 2007 by Siemens PLM Software. 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.

Sheet Metal Design methodology:

Description:

The designing of the casing in NX involves various options or tools explained below.

Tab: - After creating the 2D sketch in sketcher we use Tab option to convert into the 3D metal sheet of desirable thickness.

Normal Cutout: - After creating the sketch on the base sheet metal this option used to cut out the part drawn normally i.e., perpendicular to the plane without any stretches.

Bends: This option is used to create the bends where ever required by sketching the line on the surface according the required direction of the bend either upwards or downwards with required radius of the bend.

Flange: - This option is used to create the flanges at the edges of the base sheet metal by clicking on the upper or lower edge to get the flange towards up or down respectively.

Break Corner: - To create the fillet to the sharp corner edges we use this option by providing the required radius.

Closed Corner: - This command is used to fill the gaps between the created adjacent flanges which are perpendicular to each other.

Hem Flange: - This command is used to modify the model by folding the edge of a sheet metal flange over onto itself for the purpose of the safe handling or to increase edge stiffness.

Unbend: This option is used to unbend the modified or deformed sheet metal into straight un-deformed sheet.

Dimple: This command is used to create a raised dimple feature in a sheet metal part. The dimple(s) can be placed on any flat face including flanges and will extend in the direction of the face. The dimple feature will be governed by the settings defined in the Options Form.

Bead: - A bead is a long, drawn-out impression, which is impressed to increase stiffness in metal sheets or plates. Depending on the workpiece size and material thickness, the ratio of length, width and imprint depth must be adjusted to obtain the maximum strengthening effect.

Re-bend: It helps to re-bend the sheet to its original shape.

Mirror: - Mirror can applied for both the bodies and features where we can create or copy the same features or body with respect to the any other plane of surface.

Unite: - This command helps to unite the two mirror bodies together to form a single object.

Flat Pattern: - After the object is completely finished and to produce the machining drawing we use flat pattern option to create the detailed flat sheet with all the features marked on it along with its description.

Drafting: - Ctrl+ shift+ D helps to move to the draft window where we need to create the new sheet to produce the 2D drawings for printing.

Various graphical views of Box assembly are as below:

Isometric:

Front:

Top:

Bottom:

Drafting Sheet:

Conclusion:

Thus the Assembly of the box is done using Siemens NX tool.