Advanced Sheet Metal Design Using NX Cad Challenge_2_Box Assembly

Title: Advanced Sheet Metal Design Using NX Cad Challenge_2_Box Assembly

Objective: To design a Box Assembly using sheet metal application in Siemens NX.

Introduction: Metal that has been processed industrially into thin, flat pieces is called sheet metal. One of the basic materials used in metalworking is sheet metal, which can be bent and cut into a wide range of shapes. Sheet metal is used to create a huge variety of commonplace items.

Design Approach:

• First the bottom of the box was designed and then the top lid and the hinge of the box were designed.
• The tab was created by drawing the required sketch and then the flange were applied on both sides.
• Then by using the flange and hem flange the side portions were created.
• Then the closed corners were created to close the edge of the sheet metal box.
• Now the first half of the bottom sheet metal box was completed.
• The other half was created using mirror feature and then both the halves were combined using unite feature.
• Then for the side portion x-shaped dimple were created on both sides using dimple and mirror feature.
• For bottom a rectangular dimple was created and the four corners were provided with beads.
• Finally the bottom of the box assembly was completed by creating the hem flange on top edge of the box.
• For creating the top lid a datum plane was created at the required position and a tab was created along with the required flange.
• For creating the hinge for the top and bottom of the box assembly a small rectangular tabs were created on both faces of the box.
• By changing the sweep angle and the open loop hem flange was created.
• Then the flange were unbent using unbend command and the necessary cut outs were provided on both the tabs.
• After creating the cut outs the re-bent operation was carried out using re-bend feature.
• Finally the part was saved by adding appropriate appearances.

Description of the tool used:

Tab: Creates a base feature by extruding a sketch along a vector by a thickness value.

Normal Cut Out: Cuts material by projecting a sketch onto the model.

Bend: Modifies the model by bending material on one side.

Flange: Adds a flat flange at an angle.

Hem Flange: Modifies the model by folding the edge of a sheet metal flange over onto itself for the purpose of joining two sheets togather.

Break Corner: Provide Filllets to the corners.

Unbend: Straightens the surface over any bend.

Mirror: Copies a body using a plane.

Hole: Add holes to solid bodies.

Dimple: Lifts an area of the model inside a sketch that simulates a stamping tool.

Bead: Lifts a material along the contour of a sketch that simulates a stamping tool.

Rebend: Restores an unbend feature to its previous bent state, along with any features added after the unbend feature.

Unite: Combine the volume of two or more solid bodies into a single body.

Design Views:

Front View:

Top View:

Side View:

Isometric View:

Conclusion: A Box Assembly was designd using Siemens NX.