Advanced Sheet Metal Design Using NX Cad Challenge_2_Box Assembly
BOX ASSEMBLY DESIGN USING NX SHEETMETAL APPLICATION
OBJECTIVE:
Main objective is to Design the Box Assembly using NX sheet metal application and also to explain the tool used in this NX sheet metal application.
INTRODUCTION:
The project is about designing of Box Assembly and explaining the tools used in the NX Sheetmetal application.
A Box Assembly is a Sheetmetal component used as the container which stores the any kind of material for safe storage and to carry bunch of collective material from one place to another. The Box Assembly for this project consists of features like Tab, cut-outs, bends, flanges, dimples, Mirror and beads. Every feature is designed in an order following the industrial procedure to keep the design intent.
DESIGNING METHODOLOGY:
The designing methodology of Box Assembly model are been done following steps which are been shown in the form of flow chart.
STEP BY STEP FLOW CHART OF BOX ASSEMBLY:
DESCRIPTION:
SKETCHING OF BOX ASSEMBLY BASE:
The sketch is the fundamental base element for any model which is to be designed in sheet metal application. Each and every model required a sketch to carry on further in their modelling process.
The sketch is the basic requirement to create a tab in the NX Sheetmetal application so the first sketch created is called as base sketch. The sketch can be created according to design requirements.
TAB:
The tab is the first feature in the sheet metal component design process. All the other features are been created based on the tab in NX Sheetmetal application. The tab is been created according to the datum plane. In this box assembly modelling the tab is created in XY plane.
According to NX Sheetmetal application the thickness must be uniform in each and every side of the model for the tab feature. The tab is always parent feature for all other feature which are been following based on it.
FLANGE:
The flange is an additional face created automatically from any edge of the existing sheet metal component. This feature can be done on edge and face which is bent from the respective edge or face. It can be bent at any position or at any angle. For this box assembly design four simple flanges are created with the material inside the edge of the existing component.
BREAK CORNER:
The break corner feature breaks the sharp edges in the corners and makes it round or adds chamfer. It is like fillet feature which prevents fracture breaking in the sharp corners.
UNBEND:
The unbend is a very useful tool in sheet metal application it allows all the bent made by the bent and flange feature tool. To achieve a unbend need to select the bended face by this the bended area can be converted into unbend model.
DIMPLE:
Dimple in the sheet metal application is created using the sketch created in any face or any flange of the sheet metal component for the box assembly design project a dimple made at the centre of the component.
BEADS:
Beads are the feature added in sheet metal components in order to increase the stiffness of the component. Beads require a sketch in order to apply the feature. It can be either an open or closed profile. For this box assembly design four small beads are applied in the symmetric position.
REBEND:
All the features added after the unbend feature are added in the unbend state. After the addition of sketches and additional features are completed. The sheet metal component has to be rebend to required position. This is done using the rebend feature and selecting all the bends in order or by box selection. This completes the design process of the box assembly adding the feature.
CLOSED CORNER:
Closes a corner where adjacent two flanges meet by extending the bends and flanges. The closed corner feature is been more effective in the sheet metal application to create closed corner. The two bended area are need to be selected in order to create a closed corner.
HEM FLANGE:
The Hem Flange Closes a corner where two adjacent flanges meet by extending the bends and flanges. Hem flange Modifies the model by folding the edge either inside or outside. The hem flange creates a loop structure by defining bend radios and sweep angle to the loop.
UNITE:
The unite command is used to combine the volume of two or more solid tool bodies into a single target body. The target body and tool body are been selected in order to perform the unite feature. This feature is very effective to convert the two or more bodies into a single unite body. The mirrored bodies are been combined into single body by applying unite feature.
MIRROR:
The Mirror Feature command is used to mirror one or more features within a body this feature Used to build symmetrical parts. To mirror an entity the part which is needed to be mirrored is selected and the reference plane or reference face need to be selected. When you mirror a body, the mirror feature is associative to the original body. You cannot edit any parameters in the mirrored body.
NORMAL CUTOUT:
Normal Cut Out is necessary to remove material from a sheet metal part, you must use the Normal Cut out command in order to remove specific area to achieve design progress according to the designing methodology.
DRAFTING:
After the design is complete the execution or the manufacturing of the component required a technical drawing of the component with the provided scale and with accuracy. The necessary details such as annotations callouts bend table can be added as per the requirements. For this box assembly design a drawing is created out of the flat pattern in a 2:1 scale in A4 size.
DIFFERENT VIEWS OF COPLETE DESIGN OF SHEET METAL BOX ASSEMBLY:
ISOMETRIC VIEW:
FRONT VIEW:
TOP VIEW:
SIDE VIEW:
BOTTOM VIEW:
CONCLUSION:
In this project the sheet metal Box is successfully designed in the sheet metal workbench of siemens NX.