Advanced Sheet Metal Design Using NX Cad Challenge_1_Casing Design
SHEET METAL MODELLING OF A CASING DESIGN
OBJECTIVE:
The objective of this design is to create a Sheet metal Component of a Casing Design. In this We are Using NX Siemens as a software to create a Sheet metal component by using different commands having a easy interface.
INTRODUCTION:
Nx Siemens is software used for the modeling , aerospace , simulation, sheet metal. It is very well known for the User friendly environment and a user friendly tools which makes the work more easy and accurate . We will design the Casing model in the sheet Metal modelling.
Sheet metal is one of the fundamental process in metal working in which sheet metals are converted to bends for the required purpose. Sheet Metal Modelling is very much necessary in the most of the industries like Aerospace, Utensils, and covering Cases for all electrical components.Sheet metal Modelling now a day had become more easy due to the Use of different softwares .In this we are also creating a Sheet Metal of Casing Design using Nx Seimens.
DESIGN METHODOLOGY:
To create a Sheet metal Modelling Of Casing By Using different process steps which Shown in the Below Flow Chart.
As shown in the Flow chart we will on different stages for the creation of the required sheet metal of casing and after the completion of the designing stage we will go for drafting phase and create the Flat pattern for drafting which will have the details of the bending of the component. In Nx there are so many tools which are used for making sheet metal designing workflow so easy but in this we will use a set of tools to create the final sheet metal model. Some of the used tools are listed below.
SHEET METAL TOOL FEATURES:
TAB: This tool is used to create a base tab with uniform thickness by create a sketch and adding with this is referred as base an we can create the other tab secondary for the different sheet metal design.
FLANGE: This tool is used to create a tab like attachments which makes it with the base tab and specifying bend radius and the length of the flange and required angles.
DIMPLE: This tool is used to crate a another layer accommodated with the bend radius on the tabs and flanges which is like stamping or will lift the surface by creating a sketch on the required surface of the required face of the tab.
BEAD: This tool is used to create a bead operation which is nothing but it will make a hollow flow operation nothing like a dimple creating only on the line of curve which will select .
UNBEND: This tool is used to unbend the flanges in to sheet metal operation sheet for layouts and this is doing by simply selecting the bend which we want to unbend.
REBEND: This tool is used to rebend the shape of the bend which is unbend and made in to flat shape after the operations like drawn cutout are other . The Nx will now the save the bend and again the shape of the bend is regained
CLOSED CORNER: This tool is used to create a closed two different bends and close them and making closed and having relief and different circular or oval and different corners.
THREE BEND CORNER: This tool is used to create a closed bend of three different bends and making closed and having relief and different corners.
FLAT PATTERN: This tool is used to create a flat pattern for drafting and sheet metal operations and for metal working purposes. We can create the flat pattern by considering the base tab surfaces.
DRAFT: This tool is used to create a draft for and make a document layouts of the required views and bends of the sheet metal we prepared in the sheet metal window.
BREAK CORNER: This tool is very necessary in the sheet metal operations to create a best cutting operation as it removes the pointed edges or corners of the sheet metal by making rounded corners by the specified radius.
HOLE: This tool is used to create different types of holes like screwed holes and of different size by selecting the features of the hole.
SKETCH TOOLS IN SHEET METAL:
LINE: This is tool feature which is used to create a line by specifying the coordinated and angles or by selecting the different points on the plane.
RECTANGLE: This is a tool feature which is used to create a rectangle with different ways by three point , or by corner method etc ..after that we can specify the dimensions.
POINT: This tool is used to create a point at the require distance or angle and highlighting it for the further drawings and features on the sheet metal.
CIRCLE: This tool is used to create the circle by consider the point by using the diameter and radius of the circle.
MIRROR FEATURE: This tool is used to create a mirror of the features by selecting the features and sketches of the feature . we have to make sure that we select the sketch of the feature to mirror.
STUDIO SPLINE: This is tool which used to create a spline by taking the reference of points and the tool will automatically create a curve and we have to select points it by clockwise or anticlockwise
MOVE CURVE: This tool is used to move the curve or shift the curve to distance and to rotate the curve by specifying the angle and distance by specifying a center point to move the curve.
PROCEDURE FOR CREATING THE CASING BY USING ABOVE LISTED TOOLS:
- At first we have to open the sheet metal design window in the Nx and first we have to create a sketch by selecting on the sketch and create a rectangle for a base tab.
- After that we have to set the global thickness values all to 1 mm and create a tab from the rectangle sketch.
- Tab was created by the thickness of 1mm and we have to create Bend by creating a sketch containing lines at a distance of 10 mm from the edges and create a bend.
- After this we have to create flanges on the edges of the bend one on the inner side one on the outer side of length 5 mm.
- After that we will use the break corner tools and will create a rounded corners. After this we will unbend the by selecting a base tab.
- After that we will create a sketch on the face of the base tab as shown in the figure and we will create studio spline by selecting the edges and making a spline rotate the spline curve by using move curve.
- After that we will create point on the flanges and create a screwed hole of the M2 which will made on the four flanges.
- After that we will create a sketch on the face and create a circle and make bead of the circle . then we will use Mirror feature to mirror the bead by selecting sketch and specifying the required planes to mirror.
- After that we will rebend the bends and make a flat pattern and create a base view for the sheet document. In this the sheet metal Casing Design had been completed.
DIFFERENT VIEWS OF DESIGN:
SIDE VIEW:
ISOMETRIC VIEW:
FRONT VIEW:
TOP VIEW:
DRAFT:
CONCLUSION:
In this casing design we have made use of the different sheet metal tools and drafting knowledge to create the desired modelling of case for the sheet metal operation.