Advanced Sheet Metal Design Using NX Cad Challenge_1_Casing Design
DESIGN OF SHEET METAL CASING USING NX CAD
Objective :
The objective is to design a sheet metal casing using NX CAD
Introduction :
Sheet metal is metal formed by an industrial process into thin, flat pieces. Sheet metal is one of the fundamental forms used in metalworking, and it can be cut and bent into a variety of shapes. Countless everyday objects are fabricated from sheet metal.Thicknesses can vary significantly; extremely thin sheets are considered foil or leaf, and pieces thicker than 6 mm (0.25 in) are considered plate steel or structural steel.
Sheet metal is available in flat pieces or coiled strips.he coils are formed by running a continuous sheet of metal through a roll slitter.
casing is a substance or object that covers something and protects it.The outer casings of missiles.
Design methodology :
Description :
Sketch : In this feature we will draw the basic shapes of the profile which we are designing by selecting repective plane.this feature is on the top left side of the screen when you open the application.
Tab : This feature is used to add some thickness to our drawings. the default thickness is 3mm, but in our case change the thickness into 1 mm.
Normal cutout : The normal cutout feature is used to cut the shape normal to the plane.we have to select the previously drawn drawing ehich we have to remove.in our case it is used to make a rectangular hole in the metal sheet.
Bending : This feature is used to bend the sheet metal.select the line and manuplate the arrows in order to get required bend.define bend angle as 90 degrees for this operationand repeat the samething on the otherside too.
Flange: select the flange command, in the dialogue box select the edge to add the flange give the length as 5mm and angle as 90 degrees repeat the same procedure for the remaining three sides.
Break croner : The break corner feature is used to avoid sharp corners and make the corners round. in the dialogue box select the edge and make the method to blend and give radius as 1mm and then click ok.repeat the same procedure for remaining 9 corners.
Unbend : This unbend option is used to unbend the sheetmetal to make it flat.in this select the stationary face and next select all other faces or simply drag a rectangle over all the faces. this is used to obtain a flat metal sheet.
Hole : This hole feature s under the more button of the feature field tab.this is used to make holes of desired size and desired tyoe of hole, in the dialogue box use screw clearance hole as type of hole, with screw size of M2 and a H13 fit.select the depth as through body.
Dimple : Dimple feature is used to lift an area of the model or drawing inside a sketch that simulates a stamping tool. the dimple command makes an indentation in the sheet metal part ,using a s sketch as its outline.
Bead : The bead is like a raised rib in the sheet matal panel.it just requires only one sheetmetl face which is active.change the depth, radius and die radius in round bead edges to 1mm for our application.
Mirror feature : This feature is under the more button of the feature field.in our application this feature is used mirrot the bead in other three sides.
Rebend : It is used to rebend the metal sheet into its original shape by selecting all the faces except the stationary face or it can be done simply by draging a rectanle over it.
Flat pattern : Flat pattern option is under the flat pattern feature , select the stationary face and click ok
screenshots of Model :
Isometric view
Front view
Top view
Side view
Drawing sheet
conclusion :
The objective of the project has achieved. The sheet metal casing has desigend using NX CAD and the drafting is done on casing.