8. Moulding and casting¶

Group Assignment:¶

Individual Assignment:¶

This week we are asked to make a 3d design to mill it…

I was inspired by the recent james webb telescope mission, so I decided to design a rocket.

For more information about James webb telescope mission click here

The software design I decided to use is openscad, I thought that the rocket consists of simple geometrical parts.. so openscad will be the suitable software.

The first step is that I designed the rocket head:

After that I designed the body of the rocket:

Lastly I designed the rocket wings.

Final design:

the code I written:

// increase the visual detail
$fn = 100;

// the main body :
// a cylinder
rocket_d = 20;              // 3 cm wide
rocket_r = rocket_d / 2;
rocket_h = 100;             // 10 cm tall
cylinder(d = rocket_d, h = rocket_h);

// the head :
// a cone
head_d = 30;                // 4 cm wide
head_r = head_d / 2;
head_h = 35;                // 4 cm tall
// prepare a triangle
tri_base = head_r;
tri_height = head_h;
tri_points = [[0,            0],
              [tri_base,     0],
              [0,   tri_height]];
// rotation around X-axis and then 360° around Z-axis
// put it on top of rocket's body
translate([0,0,rocket_h])
rotate_extrude(angle = 360)
    polygon(tri_points);

// the wings :
// 3x triangles
wing_w = 2;                 // 2 mm thick
many = 2;                   // 3x wings
wing_l = 30;                // length
wing_h = 30;                // height
wing_points = [[0,0],[wing_l,0],[0,wing_h]];

module wing() {
    // let it a bit inside the main body
    in_by = 1;              // 1 mm
    // set it up on the rocket's perimeter
    translate([rocket_r - in_by,0,0])
    // set it upright by rotating around X-axis
    rotate([90,0,0])
    // set some width and center it
    linear_extrude(height = wing_w,center = true)
    // make a triangle
        polygon(wing_points);
}

for (i = [0: many - 1])
    rotate([0, 0, 360 / many * i])
    wing();

After completing in open scad.. I realized that the design is not suitable like this to procede to the milling process.. It must be cut in half,, only on face of the design must remain.

So I used Tinkercad 3d to remove the other face..

Now we are ready to go to the practical part!

set the RS player whith the wanted settings, and start.

chosing the milling type setting toolpath