Advanced Sheet Metal Design Using NX Cad Challenge_2_Box Assembly
BOX ASSEMBLY USING NX CAD SHEET METAL APPLICATION
OBJECTIVE:
To create a box assembly using NX CAD sheet metal application workbench .
INTRODUCTION :
NX CAD sheet metal application provides an environment to design sheet metal parts .It is widely used in Automotive and Aerospace industries . The box assembly is consisting of a box , a lid and hinges closing it . This is done using basic features in tab , flange , dimple , hem , break corner , unbend and rebend .
DESIGN METHODOLOGY :
DESCRIPTION :
Sketch – It is a 2d drawing drawn on a plane with the help of standard figures in NX .
A rectangular sketch was drawn in the xy plane with length 200 and breadth 150 .
Tab: This is used to extrude a sketch along a vector by a thickness value .
Flange : This is used to and flange at an angle to the planar face and a bend between the two . In this case four flanges are provided to create a box .
Flanges – Two more flanges were created .
Hem Flange – Additional supporting flanges are create with the help of hem flange . It gives an aesthetic look of a joining operation also .
Mirror body – It is used to mirror the body along the respective plane .
Unite – This is used to unite the bodies . In this case mirror body and existing body is united .
Dimple - It is used to punch a pattern in the sheet metal and it can be drawn in any flat face .
Mirror Feature : It mirrors the bead feature and sketch across different planes to get the desired output .
Dimple – Another dimple is added to the bottom face .
Unbend & Rebend – It is done to check the manufacturing feasibility of the above features .
Bead- It lifts material along the contour of the sketch and simulated a stamping tool .
Mirror feature – This feature is mirrored using this command .
Hem Flange – Again a hem flange was created to provide support . Six hem flanges were done .
Datum Plane – A plane was create by lifting the xy plane to 203 distance .
Tab – A sketch for the lid was created and thickness was given to it .
Flange – A few flange were added to all the four edges .
Tab & Break Corner – Again a tab is done on the side face . A break corner of 10 mm is provided .
Flange – Again flange is provided
Hem Flange – An open loop hem flange is provided of 325 degree and 5 mm radius .
Unbend & Normal Cutout & Rebend– The flange and the hem flange is unbent and the a normal cutout is done . Normal cutout cuts a sketch in a given surface normally .
Mirror Body – Using this feature the body is duplicated across a plane .
Tab & Break Corner – Again a tab is created above the lid and a break corner of 10 mm is provided .
Flange – A flange is provided in the edge of the tab to create the hinge .
Hem flange – A hem flange is create for the hinge .
Normal Cutout – It is used to cut the rectangular sketch from the flange and hem flange .
Rebend – A rebend is done finally to get the hinges .
FRONT VIEW
SIDE VIEW
TOP VIEW
ISOMETRIC VIEW
DRAWING SHEET
CONCLUSION :
Box assembly was made in NX sheet metal application .