Advanced Sheet Metal Design Using NX Cad Challenge_2_Box Assembly
ADVANCED SHEET METAL BOX ASSEMBLY DESIGN USING NX
OBJECTIVE
The objective of this project is to be design a sheet metal casing with consideration of manufacturing parameters and making a drawing sheet preparation for casing design .
This project also make knowledge about how to design a sheet metal that equal to industries standard of advanced NX sheet metal application .
INTRODUCTION
Sheet metal is defined us the thin sheet which made by alloys according to needed parameters .Those sheets are undergoes bending , forming , cutting, enclosing etc .
Sheet metal usage is increasing every day to life including kitchen appliances to rocket spacing every its used to fabrication of surfaces in every industries . Thin sheet metals are also known as coils and foils .
Sheet metals play a major role in automotive industries for making a surfaces of Every automobiles
Siemens Nx formerly Unigraphics is a power full CAE/CAM/CAD Tool used for every phases of engineering including Design , Analysis , Manufacturing , A class surface design .
Properties of sheet metal
1.Tensile strength
2.Bending strength
3.Compressive strength
4.yield strength
5.shear strength
6.Elastic limit
7.Hardness
1.Brittle hardness, Rockwell hardness
Design Approach /Methodology
The design approach is sheet metal design in NX sheet metal work bench
FEATURES FLOW
Features and tools used for design
Sketch tools
- Line tool - Line tool is used to create a straight line according to coordinate system
- Rectangle - To create a rectangle on a coordinate system
- Circle - create a circle according to face and plane which we selected
Sheet metal features
- Tab- Tab feature is used to extrude a base sheet metal along to the selected coordinate system the thickness of the sheet metal is based on the preference which we make .
- Normal cut out- Normal cut is used to make cut in the selected face or plane according to the geometry we create
- Bend – In sheet metal basic principal is to be bending and unbend for the case bend feature used to make bend in sheet metal according to sketch
- Flange- Flange is used to create a perpendicular or angular extend in sheet according the parameters which given as input
- Break corner – It is used to create smooth edges or chamfering in the ending of sheet metal
- Unbend - It used to make a flat sheet metal features which we make
- Hem- Hem is the process of bending sheet metal towards with respect to same surface
- Unite – make a two part as same single part
- Mirror – This feature used to make a mirroring of the feature according to the coordinate system
- Hole – Hole feature is to create the holes in the parts or components like countersink ,counterbore and threaded bore operations
- Dimple- Dimple is the feature used to lift the sketched area to assigned for making stamping process
- Bead – It is same as dimple but it lifts the contour of the sketches to asses stamping
- Flat Pattern- Flat pattern it creates a flat pattern according to the flat surface we selected
PROCEDURES TO MAKE CASING
- To create a base sketch in XY coordinate system as reference create a rectangular base as per given parameter
- In before all to create preference about making a sheet thickness and bend radius
- After making a base sketch in XY plane need to create tab
- After that creating a flange on both sides as secondary
- Create a flange on the proportional directions of flanges created .make a hem to fix the flanges from both side
- Make a mirror of the body which we created using coordinate system continue with mirror make unite for joint the two mirrored body
- Create a dimple in the flange which created make a dimple feature mirror on both sides and at bottom need to create a another dimple according to need
- Making hem in the all corners of box which created
- Create a datum plane with reference to create a lid of the sheet metal box
- Follow with create hinge for lid of the box by creating tab with open loop hem on both box and lid .using cutout option to make a cut in right way
Finishing the all steps create a flat pattern option feature to make flat view for drafting
DRAFTING A SKETCH SHEET
Import a flat pattern view to the A4 drawing sheet in NX .In orient view make flat pattern view fixed with the sheet by rotation
After making drafting save the sheet
STANDARD VIEWS MODELING
FRONT VIEW
RIGHT SIDE VIEW
TOP VIEW
BOTTOM VIEW
ISOMETRIC VIEW
DETAILED DRAWING SHEET OF MODEL
CONCLUSION
End of the project its used to learn about fundamentals of knowledge about sheet metal forming including bending radius k factor and more in depth knowledge of sheet metal forming