Advanced Sheet Metal Design Using NX Cad Challenge_2_Box Assembly

                                                               SHEET METAL DESIGN OF BOX ASSEMBLY USING SIEMENS NX-CAD

OBJECTIVE:

To design the sheet metal box assembly using siemens NX-CAD.

INTRODUCTION:

Sheet metal is a metal with a small thickness ranging from 0.5-6mm.Which is made flat and thin by rolling or hammering process.sheet metals are widely used in the manufacturing industry due to its various various advantages.

The box assembly consists of main box,cover and the hinge made out of sheet metal itself.All the parts are designed using the sheet metal feature as presented here.

DESIGN APPROACH:

DESIGN METHODOLOGY:

TOOLS AND FEATURES USED ON SHEETMETAL TO DESIGN BOX ASSEMBLY

 

1. Sketch
2. Tab
3. Normal Cutout
4. Closed corner
5. Flange
6. Break corner
7. Unbend
8. Unite
9. Hem
10. Dimple
11. Bead
12. Re bend
13. Flat pattern
14. Drafting
15. Base view

TOOL AND FEATURE DESCRIPTION

 

1. SKETCH

         It is a 2d representation of a 3d part. It includes entities like line, rectangle, spline, circle, etc. It is a predetermined drawing with dimensions and relations.

2. TAB

        It is the base part for any sheet metal design. Flanges can be made only from the tab edges.

3. NORMAL CUTOUT

        This command is to remove the desired shape of material. Removal sketch can be drawn on the sheet metal face, wherever required.

4. CLOSED CORNER

        It is used to close the edges of the flanges created.

5. FLANGE

        It is created with one or more edges at specified location. The minimum flange length must be atleast four times the thickness of the sheet metal. Bend radius is equal to the sheet metal thickness.

6. BREAK CORNER

        This command gives a smooth finish over the corners of the sheet metal part.

7. UNBEND

        It makes the part unbend, that is all the features done are made flat. This is useful while sketching on the corners and bend areas.

8. UNITE

        This feature is to combine two sheet metal parts into a single body.

9. HEM

        It is used for joining two sheet metal parts by folding the edges over each other.

10. DIMPLE

        It rises a drawn sketch from the base plate. This command doesn’t save material instead it maintains the rigidity.

11. BEAD

        It lifts material along contour sketch.

12. REBEND

        This command puts back all the bends already created also along with new features included while in unbent state.

13. FLAT PATTERN

        It is done before drafting. It gives a flattened version of the sheet metal part.

14. DRAFTING

        This command is to have 2D drawing of the sheet metal part created.

15. BASE VIEW

        It specifies the location, orientation, view and scale of the part for drafting.

BOX ASSEMBLY IMAGES

 ISOMETRIC VIEW

SIDE VIEW

 

TOP VIEW

 

BOTTOM VIEW

 

 

 

 

DRAFTING

Creating a new draft on A4 size sheet of flat pattern#1.

CONCLUSION:

In this project a sheet metal box assembly is successfully designed in the sheet metal work bench of siemens NX-CAD.