Advanced Sheet Metal Design Using NX Cad Challenge_2_Box Assembly
NX CAD
Title:
Advance Sheet metal Box Assembly Design
Aim/Objective:
- To design a sheet metal model of Box Assembly using NX CAD
- Provide some flanges, bending, Dimple, Hem & Bead etc…
- Convert into the Flat pattern & Drawing
Introduction: Box Assembly Refer to an enclosing shell, surrounding material. It is made from sheet metal. Sheet metal parts is widely used in machinery, enclose, bracket, Automobile industries due to its various advantage. The Parts are normally made up with break pass. Its thickness varies from 0.5mm to 6mm.
Design Methodology: Following are the different Step for designing Box Assembly below:-
Features Used for design
Description of Features
1). Tab: This feature is used to create the base using sketch by providing appropriate thickness.
2). Flanges: Flanges are used to extent the edges of sheet at certain angle 90° & Length 200mm both side edges of box. It is work as bend feature
3). Closed Corner: This feature is used to close the corner of two adjacent bend faces & flanges in box assembly.
4). Flanges for fastening: This feature is used for connecting two flanges together Here I create two flanges first with 0mm length and other 6.5mm length with outside bend
5). Hem: This feature is used to create folding of edges by connecting two flanges, the main purpose of this hem flange is to provide stiffness and for safe handling
6). Mirror Body: This feature creates a copy of half part about the YZ Plane
7). Unite: it works like swing feature to joined two body together and converted into single body
8). Dimple: Dimple is provided on the tab for providing the strength of the sheet metal.
9). Bead: This feature is used to provide better strength to the sheet metal. It is just like an embossing
10). Hem Flange: For easy handling Round flanges are provide to the upper edge of flange.
11). Lid Creation: A lid is cover of the box & created by Datum plane taken from the XY Plane at 203 mm distance upside and the sketch is created by taking reference of edges from the top then base tab is created
12). For Hinge Creation: Create Base tab on the YZ Plane
13). Break Corner: This feature work as a blend/fillet used to create round edges of sharp corner of sheet.
14). Web Flange: Provide web flange with length of 4 mm & angle 40° outside two times
15). Hem Flange : at the end of the flange edges hem flange is provided 5mm length & 325° angle outside bend.
16). Unbend: This feature are used when we have to create some sketch on flat surface.
17). Normal Cutout: This feature is used to cut the portion of tab by creating sketch on tab.
18). Rebend: This feature is used whenever all the sketch drawn on the flat section are conformed & ready to be manufactured
17). Similarly same procedure apply for Upper hinge at the Lid edge
13). Flat Pattern: This feature is providing the flat view of part including all the dimension.