Week 8 - Challenge 4 - Bumper

BUMPER DESIGN

First of all I got the class a design then I created the b and c surface then also I created the close body in several steps.

1. TOOLING AXIS - In creation of tooling axis I extracted a flat surface from class a then I created a point on surface giving point type as surface. At last I created a line using point direction and giving the direction as X axis and named as TOOLING LINE.
2. DRAFT ANALYSIS 1 – After creating the tooling axis I go for feature draft analysis and put the A SURFACE in material mode and pick the compass on tooling line then pick the A SURFACE then fully coloured in one side green and other one in blue it shows as that my tolling line is perfect.
3. B SURFACE – In b surface creation first of all I offset the A SURAFCE with 3mm in reverse direction(below the A SURAFCE).

A - In offset surface there are three surfaces which I have to complete that, then I extracted the middle lower of the surface with no propagation. After that I extracted the middle lower of the surface with along the fillets which is touches it with complementary mode( in complementary mode I can extract which surface I need and other surface goes vanished). I took the boundary of multiple extract 1 and extrapolated it with curvature continuity. After that I extrapolated the multiple extract 2 with tangent continuity and then I trimmed it together extrapolate 1.

B – In second step I extracted the upper surface of bumper then created the boundary and extrapolated it with curvature continuity and then I extracted the upper surface of bumper with fillets along by complementary mode then I extrapolated the hollow surface of bumper (where I selected the upper surface) with curvature continuity then I trimmed it together extrapolate 3.

C – In third step I extracted the lower side of surface in one multiple extract and upper surface of lower one I extracted it in two multiple extract then I created the boundary and extrapolated the both upper surface of lower in two part with curvature continuity and trim together after that I created the boundary and extrapolated the lower surface with curvature continuity. At last I extrapolate the trim 3 and trimmed it with the extrapolate8. At last I extracted the lower and upper both surface together with complementary mode and extrapolated it with curvature continuity and trimmed it with trim 4.

D – In fourth step I gave fillets. For fillets I extracted the surfaces whose I have to give fillets from offset and untrimmed them and measure it then I gave the fillets.

E– In fifth step for creation of close surface I created the outer edges boundary in seven part in seven part I extrapolated the six surface with curvature continuity and one with tangent continuity. After that I extracted the inner edges of hole surface as boundary then I extrapolated it with curvature continuity, then I named it as B SURAFCE.

4 C SURAFCE – For C SURFACE I created it in part.

A - C SURFACE 1- In this step I created the outer boundary of A SURFACE in six part. In six part I created sweep surface for four surface I took the line command and subtype as WITH REFRENCE SURFACE and gave the guide curve as outer boundary and reference surface as CLASS A and gave the angle 90 degree after I got the sweep surface. For two surfaces out of six gives them same sweep command as first I had given but here angle degree I gave 93 degree for clearing angle I add 3 degree then I got sweep surface. At last I see there are some gaps between them all sweep surfaces so I extrapolated them with curvature continuity and gave the none propagation mode and then trimmed together. At last I got a trim and named as C SURFACE 1.

B – C SURFACE 2 – In this step I took the inner edges of hole surface as multiple extract and extracted them then I go for sweep command. For sweep operation I created it WITH REFERANCE SURFACE and guide curve I took the multiple extract and for reference surface I took the CLASS A. At last I got a sweep surface and named it as C SURFACE 2.

5- CLOSE SURFACE – For close surface I join the A SURFACE with C SURFACE 1 and join the join 1 with C SURFACE 2 after that I trimmed it with B SURFACE then I got the CLOSE SURFACE.

6 – CLOSE BODY – For close body I went in to the part design and pick the close surface command and pick the CLOSE SURFACE to close. At last got the close body.

7- DRAFT ANALYSIS 2 – In this step I take the feature draft analysis second time and pick the compass on tooling line and pick the close body then it shows as one side green and one side blue. After that analysis I got that what I made its right.