Week 11 - Project - A pillar Design with Master Section
Week 11 - Project - A pillar Design with Master Section
- OBJECTIVE:-
- Create the A-pillar Design with Master Section
- Perform the Draft analysis on the model.
- Create the feature with reference from the master section provided
- ASSUMPTION:-
- Component material A.B.S "Acrylonitrile butadiene styrene"
- The thickness of the component is 2.5 mm.
- Recommended thickness value WRT Material "ABS" = min.= 0.8 mm , Average = 2 mm , max. = 3.2 mm
- ------------------------------------------------------------------------------
- Different views of the MODEL:-
- Consideration while designing the model:-
-
The distance between each point of the edges of two neighbouring patches must comply with the following limits:
-
For class A: no more than 10 µm = 0.01 mm
-
For class B: no more than 20 µm.= 0.02 mm
-
For class C: no more than 50 µm.= 0.05 mm
-
The angle between the tangents to the surface on the edges of two neighbouring patches must comply with the following limits:
-
For class A: no more than 6’ = (0.1◦).
-
For class B: no more than 12’ = (0.2◦).
-
For class C: no more than 30’ = (0.5◦).
-
(Note:- ( ’) _means minute:- (ex. conversion of minute to degree: - 6’ = 6/60 = 0.1 degree)
-
------------------------------------------------------------------------------
- Expanded tree view with model construction steps:-
- CLASS-A SURFACE INPUT AND BOUNDARY CHECK
- CLASS-A SURFACE_SECTIONING INPUT AND DIMENSION CHECK
- TOOLING AXIS.
- DEFINITION:-
- Tooling axis:- “ main tool axis” is the axis that defines the mould opening direction.
- The tooling axis must be created on a feature like a hole, slot, cut-out, flat surface, or continuous surface of a Class A Surface.
- The tooling axis justifies the angle sector of the side wall draft ”C-surface”, the positive angle of the C surface in the direction of the ejection, “i.e. it creates a relation of the component from mould opening to the ejection of part”.
- The tooling axis must be created in such a manner that gives the ejection clearance and mould opening clearance such no undercut will come in the way during ejection and mould opening,
- it also provides the reference axis to the slider axis or angled pin axis, which is used for the undercut inserts, (known as the undercut at an angle of tool axis),
- While designing mould tools, it is practised that the ejection pins - straight action form pins must be constrained to move parallel to the tooling axis.
- Straight action form pin these pins are ejection pins used to release the Internal undercuts”,
- similarly, sliders are used to remove the external undercut.
- METHODOLOGY:- " BISECTION LINE FROM SECTIONING PROVIDED "
- In this method, tooling direction is found with the help of draft analysis.
- method:-
- BISECTION: - TOOLING DIRECTION IS TAKEN FROM THE FEATURE SECTIONING PROVIDED
- MAIN TOOLING & LIFTER DIRECTION:-
- DRAFT ANALYSIS CHECK OF CLASS-A_WRT MAIN TOOLING DIRECTION
- ------------------------------------------------------------------------------
- B-SURFACE
- (view mode_shading with edges without smooth edges):- This mode is used to check the discontinuity of patches on the surface.
- C-SURFACE
- A+C SURFACE
- CLOSED-SURFACE
- CLOSED-SURFACE-BOUNDARY CHECK
- CLOSED-SURFACE-DRAFT ANALYSIS
- SOLID BODY:- from a closed surface
- ------------------------------------------------------------------------------
- B-SIDE FEATURE "DOG HOUSE"
- DEFINITION:-
- DOG HOUSE IS USED AS AN EXTENSION FEATURE
- IT IS USED TO EXTEND THE HEIGHT OF ANY ENGINEERING FEATURE (EG-SCREW BOSS)
- AS INCREASING THE HEIGHT OF THE BOSS IS NOT PREFERABLE AS IT CAUSE BUKLING, LOW STRENGTH AND CAUSE MASSIVE SINK MARK.
- IT IS ALSO USED FOR ATTACHING TRIM SNAP CLIPS "PRE-MOUNTED PANEL FASTENER" AS SHOWN BELOW IMAG
- A-PILLAR Trim with engineering feature "DOG HOUSE"
- DOG HOUSE "FOR PRE-MOUNTED PANEL FASTENER":-
- DIMENSIONING OF DOG HOUSE_"WRT TO REFERENCE DIMENSIONS FROM THE INPUT SECTIONING"
- INPUT REFERENCE DIMENSIONS FROM SECTION:-
- DIMENSIONS OF DOG HOUSE WITH CLIP:-
- CLIP SELECTION:-
- DRAFT ANALYSIS OF DOG HOUSE:- " FROM MAIN TOOLING DIRECTION"
- DRAFT ANALYSIS OF DOG HOUSE:- " FROM LIFTER TOOLING DIRECTION"
- DRAFT ANALYSIS OF A-PILLAR TRIM
- CLASH AND CONTACT ANALYSIS OF DOG HOUSE AND CLIP
- DISTANCE AND BAND ALANYSIS OF DOG HOUSE AND CLIP
- SKETCHES:-
- FULL BODY VIEW W.R.T INPUT SECTION.
- ------------------------------------------------------------------------------
- RENDERED SECTION VIEW
- RENDERED VIEWS
---------------------------------------END-----------------------------------