Challenge

Advanced Sheet Metal Design Using NX Cad Challenge_1_Casing Design

CASING DESIGN

IN THIS TUTORIAL WE WILL LEARN THE STEP BY STEP PROCEDURE TO DESIGN A SHEET METAL CASING USING SIEMENS NX SHEETMETAL APPLICATION.

1. INTRODUCTION:-

STARTNX12.0 AND CREATE A NEW SHEET METAL MODEL CALLED CASING.PRT
CREATE A SKETCH INTHE XY PLANE AND DRAW A RECTANGLE CENTRED AT THE ORIGIN WITH AN XLENGTH OF 60MM AND a Y WIDTH OF 50MM.
EXIT THE SKETCH MODE.

2. CHANGING DESIGN PARAMETERS:-

GO TO MENU-PREFERENCES-SHEETMETAL
IN THE SHEET METAL PREFERENCE DIALOG BOX SET ALL THE FOUR GLOBAL PARAMETERS TO 1MM

3. ADDING A SOLID SHEET AND CUTOUT:-

USE THE TAB FEATURE FOR CREATING A FIRST RECTANGULAR METAL SHEET OF 1MM IN THICKNESS
CREATE A NEW SKETCH IN THE PLANE P CONTAINING THE UPPER FACE OF THE RECTANGULAR SHEET AND PARALLEL TO THE XY PLANE
IN THAT SKETCH DRAW A RECTANGLE SYMMETRIC W.R.T THE X AXIS WHICH IS COINCIDENT WITH THE LEFT EDGE OF THE RECTANGULAR METAL SHEET. THE RECTANGLE IS 5MM WIDE AND 40MM LONG
WXIT THE SKETCH MODE AND USE THE CUTOUT BUTTON FOR MAKING A RECTANGULAR HOLE IN METAL SHEET.

4. BENDING:-

AGAING DRAW A SKETCH IN THE PLANE P CONSISTING IN TWO SYMMETRIC HORIZONTAL LINES W.R.T THE A AXIS . THE UPPER HORIZONTYAL LINE IS LOCATED AT 10MM FROM THE UPPER LEFT CORNER OF THE METAL SHEET.
EXIT THE SKETCH MODE AND CLICK THE BEND BUTTON, UNDER THE MORE BUTTON OF THE BEND FIELD.
IN THE BEND DIALOG BOX, SELECT ONE LINE AS BEND LINE ANS USE AN ANGLE OF 90 DEGREES.
REDO THE SAME PROCEDURE FOR THE OTHER SYMMETRIC LINE.
IFF NEEDED USE THE REVERSE SIDE OPTION FOR OBTAINING THE SAME RESULT AS BELOW.

5. ADDING FLANGE:-

CLICK ON THE FLANGE BUTTON USE A LENGTH OF 5MM AND APPLY THE FLANGE
APPLY THE SAME FLANGE TO THE CORRESPONDING SYMMETRIC EDGE OF THE METAL SHEET.
ALSO , APPLY THE SAME FLANGE ON THE BELOW SHOWN EDGE OF THE METAL SHEET, AND ITS SYMMETRIC COUNTERPART.\THE FINAL RESULT TO OBTAIN IS SHOWN HERE BELOW.

6. BREAKING CORNERS :-

CLICK ON THE BREAK CORNER FEATURE .IN THE BREAK CORNER DIALOG BOX, USE THE BLEND METHOD WITH A REDIUS OF 1MM.
APPLY THE BREAK CORNER TO THE EDGES

7. UNBENDING THE METAL SHEET:-

CLICK ON THE UNBEND FEATURE,SELECT AS STATIONARY FACE THE LARGER HORIZONTAL FACE OF THE METAL SHEET. SELECT AS BEND FACE ONE OF ITS ADJACENT FACE.
REDO AS MANY SIMILAR OPERATIONS AS NECCESSARY IN ORDER TO OBTAIN A FLAT METAL SHEET .

8.ADDING HOLES:-

WE WILL FIRST SKETCH FOUR POINTS FIGURING THE CENTERS OF THE FOUR WANTED HOLES.

CREATE A SKETCH , DRAW A LINE THEN DRAW POINT OF MIDDLE CENTRE OF LINE
ADDING HOLE - CLICK ON HOLE FEATURE UNDER THE MORE OPTION.
IN THE HOLE DIALOG BOX USE SCREQ CLEARANCE HOLE AS TYPE. WITH A M2 SCREW SIZE AND A H13 FIT . SET THE DEPTH LIMIT OPTION TO THROUGH BODY.
CREATE FOUR HOLES CENTRED ON THE FOUR PREVIOUSLY DEFINED POINTS.

9. ADDING A DIMPLE:-

IN THE XY PLANE, CREATE THE FOLLOWING CREOSS SKETCH, WHERE EACH SIDE IS 5MM IN LENGTH, THE SKETCH IS CENTRED AT THE ORIGIN.
CLICK ON THE STUDIO SPLINE BUTTON
IN THE STUDIO SPLINE DIALOG BOX, SET THE TYPE FIELD TO BY POLES, CHECK THE CLOSED OPTION.
SELECT ONE BY ONE ALL THE 16POINTS OF THE SKETCH IN A CLOCKWISE OR ANTICLOCKWISE FASHION.
CLICK OK TO VALIDATE THE CREATION OF THE NEW SPLINE CURVE.
CLICK ON THE MOVE CURVE BUTTON
IN THE MOVE CURVE DIALOG BOX,SELECT THE SPLINE CURVE YOU JUST DRAWN
SET THE MOTION OPTION OF THE TRANSFORM FIELD TO ANGLE.\
SPECIFY THE ORIGIN(0,0,0)AS AXIS POINT,
FINALLY ENTER AN ANGLE OF 45DEGREES AND CLICK OK
ADDING A DIMPLE- CLICK ON DIMPLE FEATURE AND SELECT THE SPLINE CURVE .
SET THE DEPTH OPTION TO 1MM AND SIDE WALLS TO MATERIAL INSIDE .
EXPAND THE DIALOG BOX AND EXPAND THE ROUNDING FIELD BY LEFT CLICKING ON IT.
SET ALL THE PARAMETERS OF THE ROUNDING FIELD TO 1MM\CLICK OK

10. ADDING BEADS:-

DRAW A CIRCLE OF 5MM IN DIAMETER AS SHOWN.
CLICK ON THE BEND BUTTON IN THE BEAD DIALOG BOX, SELECT THE CIRCLE YOU JUST DRAWN.
SET THE DEPTH AND RADIUS OPTIONS TO 1MM AND THE CROSS SECTION TO CIRCULAR
EXPAND THE DIALOG BOX AND EXPAND THE ROUNDING FIELD.
IN THE ROUNDING FIELD, SET THE DIE RADIUS TO 1MM
CLICK ON THE MIRROR FEATURE UNDER MORE BUTTON
SELECT THE BEAD AND ITS CORRESPONDING SKETCH AS FEATURE TO MIRROR .
SELECT THE YZ PLANE AS THE MIRRIR PLANE AND CLICK APPLY TO VALIDATE.
THEN SELECT THE TWO BEADS AND REDO A FEATURE MIRROR BY CHOOSING THIS TIME THE XZ PLANE

11. RE-BENDING:-

CLICK ON THE REBEND FEATURE
RE-BEND THE FACES BY SELECTING THEM IN THE REVERSE ORDER IN WHICH THEY WERE BEND.
HIDE THE SKETCHES. YOU SHOULD OBTAIN THE SAME RESULT AS THE ONE SHOWN AT THE BEGINING OF THIS TUTORIAL.

12. DRAFTING:-

CLICK ON THE FLAT PATTERN BUTTON, UNDER FLAT PATTERN MENU
SELECT THE CENTRAL FLAT FACE OF THE METAL SHEET AND VALIDATE. THIS WILL CREATE A FLATTENED VERSION OF OUR METAL SHEET.
IF AN INFORMATION DIALOG BOX OPENS , JUST CLICK OK.
FOR THE MOMENT THE FLATTENED VERSION IS NOT VISIBLE . TO MAKE IT VISIBLE, GO IN THE PART NAVIGATOR AND EXPAND THE MODEL VIEW TREE.
DOUBLE CLICK ON THE OBJECT NAMED FLAT-PATTERN
CREATE A NEW DRAFTING FILE OF SIZE A4 AND ADD A NEW BASE VIEW
IN THE BASE VIEW DIALOG BOX, SELECT IN THE OPTION MODEL VIEW TO USE FLAT PATTERN
SET THE SCALE TO 2:1
THE DRAFT WILL PROBABLY BE TOO BIG FOR FITTING INSIDE THE AVAILABLE SPACE OF THE FORM.
ROTATE IT USING THE ORIENT VIEW TOOL BUTTON IN ORDER TO MAKE IT FIT.
ADD THE ROTATE DRAFT TO ITS FORM.
DELETE THE TEXT THAT AUTOMATICALLY ADDED WITH THE DRAFT.