#### Carsten Arnholm

• Jr. Member
• Posts: 65
« on: 2019-10-06, 20:24:44 »
AngelCAD was used to design a part in order to fix a broken radiator, and the result turned out well, the radiator can be used again! Image of printed part is attached.

More images as well as STL for this part can be found at  https://www.thingiverse.com/thing:3900987

Source code for the part follows
The code illustrates 2d and 3d features of AngelCAD, plus using variables for parametric modeling.

shape@ main_shape()
{
double dx  = 59.0;
double dy  = 26.0;
double dy1 = 6.0;
double th  = 2.0;   // thickness
double h1  = 13.0;  // height of circular part

double r_hscrew = 2.3;     // radius of horizontal screw holes
double r_vscrew = 2.0;     // radius of vertical screw holes
double x_screw = 20.0;     // x-coordinate of screw holes
double y_screw = dy - 8.5; // y-coordinate of vertical holes
double z_screw = 7.0;      // z-coordinate of horizontal holes

double r_power = 10.5/2;   // radius of power hole
double y_power = dy - 8.5 - 5.0;

double x_flange = 10.0;

// bottom plate is intersection between curcle and rectangle
shape2d@ rect = translate(-dx/2,0)*rectangle(dx,dy);
circle@  circ = circle({-dx/2,dy1},{0,0},{+dx/2,dy1});

// main part consiste of horizontal and vertical pieces
solid@  horiz = linear_extrude(rect & circ,th);
solid@  vert  = linear_extrude(rect & (circ - translate(0,th)*circ),h1);
solid@ main_part = horiz + vert;

// holes for the vertical screws
solid@ v_screw = cylinder(r:r_vscrew,h:50,center:true);
@main_part = main_part - translate(+x_screw,y_screw,0)*v_screw;
@main_part = main_part - translate(-x_screw,y_screw,0)*v_screw;

// holes for the horizontal screws
solid@ h_screw = cylinder(r:r_hscrew,h:50,center:true);
@main_part = main_part - translate(+x_screw,0,z_screw)*rotate_x(deg:90)*h_screw;
@main_part = main_part - translate(-x_screw,0,z_screw)*rotate_x(deg:90)*h_screw;

// slot for the power wire
solid@ power1 = cylinder(r:r_power,h:50,center:true);
solid@ power2 = translate(0,dy,0)*power1;
@main_part = main_part - translate(0,y_power)*hull3d(power1,power2);

// slots for the flanges in the radiator plastic
solid@ flange = rotate_x(deg:45)*cuboid(dx:3.0,dy:18,dz:15,center:true);
@main_part = main_part - translate(+x_flange,0,0)*flange;
@main_part = main_part - translate(-x_flange,0,0)*flange;

// add triangular flanges for increased stiffness
solid@ triangle = translate(0,3,1)*rotate_y(deg:-90)*linear_extrude(polygon({0,0},{10,0},{0,10}),th);

@main_part = main_part + translate(+x_flange+5,0,0)*triangle;
@main_part = main_part + translate(-x_flange-3,0,0)*triangle;

@main_part = main_part + translate(+x_flange+17,3,0)*triangle;
@main_part = main_part + translate(-x_flange-15,3,0)*triangle;

return main_part;
}

void main()
{
shape@ obj = main_shape();
obj.write_xcsg(GetInputFullPath(),secant_tolerance:0.01);
}