Advanced Sheet Metal Design Using NX Cad Challenge_6_Bracket

TITLE: Sheet metal bracket design using Siemens Nx

OBJECTIVE:

• To design sheet metal bracket using siemens Nx
• To improve sheet metal designing skills.

INTRODUCTION:

Sheet metal design is governed by the premise that the raw material used to form a sheet metal part is of common stock and uniform thickness. Sheetmetal is the most versatile material in the manufacturing industry. It ranges in thickness from wispy leaf to heavy plate. Its uses expand across many different industries including transportation, aerospace, electronics, machinery and many more. Siemens Nx considers the fabrication method needed for manufacturing. While designing as I created contour flange, beads, hole etc. after designing it is showed in flat pattern feature for manufacturing consideration. In this project we are dealing with sheet metal bracket design using Siemens Nx.

DESIGN METHODOLOGY:

The bracket created for ths project consist of various features like contour flange, bead, hole etc. simple and easy design methodology is followed in industrial manner. The design methodology used for this project is depicted below.

DISCRIPTION:

SKETCH:

Sketches are the foundation of any design model. For creating most of the sheet metal surface first, we have to create a base sketch. For designing of sheet metal bracket firstly, I created a base sketch for contour flange. other than contour flange I created a sketch on different face and planes for further designing.

Contour Flange:                                                           

A contour flange can be used to create a base feature from a sketch, or it can be used to quickly construct flange geometry along existing thickness edges of a sheet metal part. For this bracket design I creates a contour flange having a thickness of 3mm and width of 200mm.

Normal Cutout:

Normal cutout feature is used to remove material from the part by creating a desired sketch on to the face or part. For this bracket design I creates a rectangular sketch to remove material.

Break Corner:

Break corner feature is used to smoothen the corners by giving chamfer or fillet to the sheet metal corners. Break corner is used to prevent stress concentration and fracture braking while manufacturing. In this bracket design I used break corner 3 times.

Unbend:

Unbend is the most likely used feature in NX. In industry while manufacturing we have to first perform ceratin operation on unbended sheet metal part  then we have to bend it for easy and accurate manufacturing. Thus similar activity we followed in the siemens Nx. In this bracket design I used this command once.

Bead:

Bead is similar to the dimple only difference is that in dimple we lift sketch area while in bead we lift the sketch contour. Beads are added in sheet metal in order to increase the stiffness and strengthen the component. In this firstly I creates a sketch of line having length of 250mm, then created a bead.

Rebend:

Rebend feature is used to restore the unbend feature to its previous bend state along with any features added after the unbended feature. While performing rebend we have to keep eye on selecting bends in order they were unbended.

Hole:

Hole feature is used to generate hole with definite perameter on sheet metal in siemens NX. We can create different types of holes, for this bracket design I creates genaral hole. Fistly, I creates a sketch of 3 points then creates a hole of 20mm diameter.

Flat Pattern:

Flat pattern is the representation of the entire sheet metal component in the 2D form with all the bends, beads, holes and additional features in the form of lines or edges. The flat pattern ensures the ability to cut the sheet metal out of the raw sheet metal plate. It removes the possible errors such as interface or collision within the same component.

Drafting:

After the modelling, the manufacturing requirement of the component a technical 2D drawing of the component with accurate dimensions or scales is denoted, for achieving this we are using the command draft.

Iso View:

Front View:

Top View:

Side View:

Conclusion:

• Succesfully learned to design a sheet metal bracket in industrial manner using siemens NX.
• Improves sheet metal designing skills.