/Tools/Clamp.foocad

A mini clamp, useful for adding pressure when glueing small items.

The pieces are easy to print. No supports needed.

However, I recomment a brim when printing the long thin bolt, to ensure it does get knocked over.

It produces a reasonable pressure, but I'm sure it's very easy to strip the threads if you tighten a lot.

If the threads do strip, you could melt in a threaded insert, and use a regular metal bolt ;-))

FooCAD Source Code

import static uk.co.nickthecoder.foocad.chamferedextrude.v1.ChamferedExtrude.*
import uk.co.nickthecoder.foocad.threaded.v2.*
import static uk.co.nickthecoder.foocad.threaded.v2.Thread.*

class Clamp : AbstractModel() {

    @Custom( about="The internal size of the clamp" )
    var size = Vector2(20,25)

    @Custom( about="Width and thickness" )
    var thickness = 10

    @Custom
    var threadDiameter = 6.0

    @Custom
    var footSize = Vector2(9,4)

    @Custom
    var clearance = 0.35

    meth thread() = Thread(threadDiameter)
        .headSize(Vector2(threadDiameter*2,threadDiameter*8/6))
        .headChamfer(threadDiameter/6)
        .rodChamfer(threadDiameter/60)
        .clearance(clearance)

    @Piece
    fun clamp() : Shape3d {
        val thread = thread()
        val profile = Square( size.x + thickness, size.y + thickness * 2 ).centerY() -
            Square( size ).centerY()
        val c = profile.toPolygon().roundAllCorners(2).chamferedExtrude( thickness, 1 )
        val hole = thread.threadedHole( thickness*2 + 2 )
            .center()
            .rotateX(90)
            .translate( thickness/2, 0, thickness/2 )
            .frontTo( profile.front - 1 )

        return c - hole
    }

    @Piece
    fun bolt() : Shape3d {
        return thread().bolt( size.y + thickness + 2 )
    }

    @Piece
    fun boltFlat() : Shape3d {
        val thread = thread()
        val bolt = thread.bolt( size.y )
            .rotateX(90)
            .translateZ(thread.coreRadius() * 0.8 )
        val slice = Cube( size.y*2 ).centerX().topTo(0).backTo(0)

        return bolt - slice
    }

    @Piece
    fun foot() : Shape3d {
        val thread = thread()
        val foot = Circle( footSize.x/2 )
            .chamferedExtrude( footSize.y, 0.4, 1 )
        val hole = thread.threadedHole( foot.top ).clipped().bottomTo( 1 )
        return foot - hole
    }

    @Piece
    fun bigBase() : Shape3d {
        val base = Square( size.x+thickness-2 ).center().roundAllCorners(1)
            .chamferedExtrude( thickness*0.7, 0.4, 1 )
        val slot = Cube(100, thickness+0.3, 100).centerY()
            .leftTo(base.left + thickness)
            .bottomTo(2)

        return base - slot
    }

    meth preview() : Shape3d {
        val clamp = clamp().mirrorY()
        val bolt = bolt().rotateX(90).translate( thickness/2, -clamp.front + thickness, thickness/2 )

        return clamp + bolt.previewOnly()
    }

    override fun build() : Shape3d {

        return foot().translateX(-thickness*1.5) + bolt() + clamp().translateX(-thickness/2)        
    }
}