flange-with-patterns

// Flange
// A flange is a flat rim, collar, or rib, typically forged or cast, that is used to strengthen an object, guide it, or attach it to another object. Flanges are known for their use in various applications, including piping, plumbing, and mechanical engineering, among others.

// Define constants
const mountingHoleDia = .625 // inches
const baseDia = 4.625 // inches
const pipeDia = 1.25 // inches
const thickness = .625 // inches
const totalThickness = 0.813 // inches
const topTotalDiameter = 2.313 // inches
const bottomThickness = 0.06 // inches
const bottomTotalDiameter = 2.5 // inches
const mountingHolePlacementDiameter = 3.5 // inches
const baseThickness = .625 // inches
const topTotalThickness = totalThickness - (bottomThickness+baseThickness) // inches
const holeLocator = baseDia - 8
const nHoles = 4

// Add assertion so nHoles are always greater than 1
assertGreaterThan(nHoles, 1, "nHoles must be greater than 1")

// Create the circular pattern for the mounting holes
const circles = startSketchOn('XY')
  |> circle([mountingHolePlacementDiameter /2, 0], mountingHoleDia / 2, %)
  |> patternCircular2d({
       arcDegrees: 360,
       center: [0, 0],
       repetitions: nHoles - 1,
       rotateDuplicates: true
     }, %)

// Create the base of the flange and add the mounting holes
const flangeBase = startSketchOn('XY')
  |> circle([0, 0], baseDia/2, %)
  |> hole(circles, %)
  |> hole(circle([0, 0], pipeDia/2, %), %)
  |> extrude(baseThickness, %)

// Plane for top face
const topFacePlane = {
  plane: {
    origin: {
      x: 0,
      y: 0,
      z: baseThickness
    },
    xAxis: { x: 1, y: 0, z: 0 },
    yAxis: { x: 0, y: 1, z: 0 },
    zAxis: { x: 0, y: 0, z: 1 }
  }
}

// Create the extrusion on the top of the flange base
const topExtrusion = startSketchOn(topFacePlane)
  |> circle([0, 0], topTotalDiameter/2, %)
  |> hole(circle([0, 0], pipeDia/2, %), %)
  |> extrude(topTotalThickness, %)

// Create the extrusion on the bottom of the flange base
const bottomExtrusion = startSketchOn("XY")
  |> circle([0, 0], bottomTotalDiameter/2, %)
  |> hole(circle([0, 0], pipeDia/2, %), %)
  |> extrude(-bottomThickness, %)