Week 10 - Challenge 3 - Door Trim Lower with Engineering Features
YOUR ANSWERS:
AIM : DOOR TRIM LOWER WITH ENGINEERING FEATURES .
OBJECTIVE : THE MAIN AIM OF THIS CHALLENGE IS TO CREATE A SOLID BODY OF DOOR TRIM LOWER WITH THE HELP OF THE CLOSED SURFACE METHOD BY USING THE GENERATIVE SHAPE DESIGN WORKBENCH IN CATIA V5 . PERFORMING THE DRAFT ANALYSIS ON THE SOLID PART BODY OF THE DOOR TRIM . GIVEN SAMPLE DESIGN OVERVIEW : INITIALLY WE NEED ....
GIVEN SAMPLE PART :
OVER VIEW :
INITIALLY , WE NEED TO OFFSET THE GIVEN DOOR TRIM CLASS A SURFACE IN THE INNER DIRECTION TO THE REQUIED THICKNESS ( HERE THE THICHKNESS IS 2.5MM). AFTER THAT, WE NEED TO CLOSE THE PATCHES ON THE OFFSET SURFACE OF THE BUMPER , THE PATCHES ARE FORMED DUE TO THE FILLETS ON THE CLASS A SURFACE . ONCE ALL THE PATCHES ARE CLOSED BODY . BY USING THE CLOSED BODY COMMAND IN THE PART WORKBENCH WE CAN GET THE SOLID BODY FROM THE CLOSED SURFACE OF THE DOOR TRIM . NOW , I CREATED THE HEAT STAKES AND LOCATORS BY CONSIDERING ALL THE SURFACES ARE DRAFTED PROPERLY OR NOT (THE DRAFT ANGLE FOR THE PLASTIC COMPONENT IS 0.5 DEG TO 3.DEG .
TOOLING AXIS :
To create the tooling axis , i extracted a surface from class a and created a point in the middle of the surface by using the point command and created a line at that point through the x-axis . now, i performed a draft analysis check from that line whether the created tooling axis is in the correct position or not . if in the draft , analysis check the surface highligted with green colour on both sides of the tooling axis os in the correct posoition and direction .
DRAFT ANALYSIS FOR CLASS A SURFACE :
WE DO PERFORM THE DRAFT ANALYSIS CHECK FOR CLASS A SURFACE BEFORE WE MAKE SOLID AND CREATION OF B -SIDE FEATURES . INITIALLY I ALIGN THE COMPASS TO THE TOOLING AXIS AND I GAVE A 3 DEG DRAFT ANGLE FOR THE GREEN COLOUR IN THE COLOUR BAR . IF THE SURFACE IS HIGHLIGHTED IN GREEN COLOUR THE DRAFT ANGLE IS GIVEN PROPERLY FOR CLASS A SURFACE . IF THE CLASS A SURFACE IS NOT HIGHLIGHTET FULLY IN GREEN COLOUR, THAT MIGHT BE THE REASON FOR THE DRAFT ANGLE OF THE CLASS A SURFAE ..
CLASS B SURFACE :
TO CREATE THE CLASS B SURFACE , OFFSET THE A CLASS SURFACE INSIDE AS PER OUR THICKNESS REQUIREMENT ( HERE THE THICHNEESS IS 2.5MM , SO T OFFSET THE CLASS A TO 2.5MM INSIDE ). ONCE THE OFFSET IS CREATED , WE CAN OBSERVE SOME PATCHES ON THE OFFSET SURFACE , BY TAKING THE BOUNDARY FOR THE OFFSET SURFACE , THOSE PATCHES ARE FORMED DUE TO THE FILLETS ON THE CLASS A SURFACE . WE NEED TO COVER THOSE PATCHES WITH THE HELP OF THE MULTI- SECTION SURFACE COMMAND BY EXTRACTING THE PATCH BOUNDARIES. ONCE ALL THE PATCHES ON THE OFFSET ARE COVERED PROPERLY JION ALL THE PATCHES WITH THE OFFSET SURFACE , TO GET THE REPLICATED SURFACE OF THE CLASS A SURFACE .
OFFSET :
PATCH ALL JION :
PATCH 1:
PATCH 2:
PATCH 3 :
PATCH 4 :
B SURFACE :
C CLASS SURFACE :
I USED THE SWEEP COMMAND TO CREATE THE CLASS C SURFACE CONCERNING THE BOUNDARY OF THE CLASS A . INITIALLY , I EXTRACTED THE BOUNDARY OF THE CLASS A SURFACE WITH TANGENT CONTINUITY, AND I SWEEP THE EXTRACTED BOUNDARY CONCERNING THE SURFACE AT 90 DEG ( FOR DRAFT ANGLE ) FOR 4MM TO INTERSECT PROPERLY WITH THE CLASS B SURFACE . ONCE WE SWEEP ALL THE SURFACE BOUNDARIES OF CLASS A, EXTRAPOLATE THE SWEEPED SURFACES UNTIL BOTH SURFACES GOT IN TERSECT PROPERLY , AND TRIM THEM TO REMOVE EXTENDED EXTRAPOLATED SURFACES TO GET A PROPER SWEEP BOUNDARY THROUGH THE ENTIRE SURFACE, INCLUDING THE CENTRE HOLE OF THE DOOR TRIM . NOW, JION BOTH CLASS A AND SWEEP BOUNDARY TO GET THE COMPLETE CLASS C SURFACE.
PART BODY :
TO CREATE THE SOLID PART BODY FROM THE CLOSED SURFACE , I USED THE CLOSED SURFACE COMMAND IN THE PART WORKBENCH .
CREATION LOCATORS :
TO CREATE THE LOCATORS , I CREATED A SKETCH ON THE BODY . AFTER CREATING THE SK ETCH ON THE BODY . AFTER CREATING THE SKETCH , I PAD IT 20MM IN HEIGHT AND THICKEN IT TO 1.3MM AND I DRAFTED IT WITH 0.5 DEG IN THE DIRECTION OF THE TOOLING AXIS . I GAVE 5MM OF CHAMFER WITH 45 DEG OF INCLINATION AND AFTER I GAVE A FILLET OF 0.25MM RADIUS .
4 WAY LOCATOR:
2 WAY LOCATORS :
CREATE HEAT STAKE. DRAW ASKETCH ON THE SURFACES. AFTER THE CREATION OF THE SKETCH, PAD IT TO 18 TO 12MM HEIGHT AND A DRAFT ANGLE OF 0.5 DEG ON BOTH SIDES ( INSIDE AND OUTSIDE )AND THEN PROVIDE A FILLET WITH A 0.20MM RADIUS. AFTER CREATING THE HEAT STAKE, CREATE THE RIBS, FOR SUPPORTING PURPOSES. TO CREATE THE RIBS, DRAW A SKETCH AND PADDED IT TO HEIGHT LESS THAN THAT OF THE HEAT STAKE AND 1MM IN THICKNESS. AFTER PADDING THE RIBS, DRAFTED 0.5 DEG IN THE TOOLING AXIS DRIECTION AND FILLET IT WITH A 0.20MM RADIUS. FINALLY , USE UNION TRIM ON THE RIBS WITH A HEAT STAKE TO REMOVE THE RIBS AS PER THE REQUIREMENT , WHICH ARE PRESENT INSIDE THE HEAT STAKES.
TREE STRUCTURE :
CONCLUSION :
THUS BY FOLLWING THE ABOVE WE CRATE THE DOOR TRIM WITH B CLASS FEATURES ( HEAT STAKE AND LOCATOR PINS).