CLIC

Mod

ule

mee

ting

, 22/

08/2

011

N. C

hrit

in (

EN

/MM

E)

Cradles design for CLICmodule supporting system

(EDMS 1158277)

General principleMain inputs an requirementsSuggested solutions for the alignmentAssemblingConclusion

CLIC

Mod

ule

mee

ting

, 22/

08/2

011

N. C

hrit

in (

EN

/MM

E)Cr

adle

s de

sign

for C

LIC

mod

ule

supp

ortin

g sy

stem

General principle

Girders Cradles Articulation pointsStandard active

motion devices

Modules trains (principle, different length...)Improvement of an existing deviceCradles(interface) and articulations point (degrees of freedom) are in-between girdersConsiderations: rigid girders, Vs exists and are well aligned...

=> Cradle and articulation point are important components

(...)(...)

Isolated activemotion devices

Beam axle

CLIC

Mod

ule

mee

ting

, 22/

08/2

011

N. C

hrit

in (

EN

/MM

E)Cr

adle

s de

sign

for C

LIC

mod

ule

supp

ortin

g sy

stem

Main inputs and requirements

Beam alignment accuracy (±20µm)Radial and longitudinal efforts (500N)Girdersshort space, material, manufacturing, tolerances?Environment compact assembly (Height, widthDisplacement ranges (ΔZ= X=Δ ±3mm, Y=Δ ±0.4mm)Weight (max. 4000N/m)Assembling modular and simpleActuators overall volume

CLIC

Mod

ule

mee

ting

, 22/

08/2

011

N. C

hrit

in (

EN

/MM

E)Cr

adle

s de

sign

for C

LIC

mod

ule

supp

ortin

g sy

stem

General principle(zoom on the articulation point principle)

Objective: beam axle = beam axle

Girder sub-assembly Articulationsub-assembly

Girder sub-assembly

No adjustment device in-between 2 girdersWe need to have less sub-assemblies as possible.Inside sub-assemblies, all red references should be well aligned together!

CLIC

Mod

ule

mee

ting

, 22/

08/2

011

N. C

hrit

in (

EN

/MM

E)Cr

adle

s de

sign

for C

LIC

mod

ule

supp

ortin

g sy

stem

General principle(Girder sub-assembly)

Accuracy not easy to obtain but the problem can be skirted around by using shims

MachiningAccuracy OK

Objective: V supports references and holes must be well positioned between them

Red references are important<->Metrological control needed!

Beam axle

CLIC

Mod

ule

mee

ting

, 22/

08/2

011

N. C

hrit

in (

EN

/MM

E)Cr

adle

s de

sign

for C

LIC

mod

ule

supp

ortin

g sy

stem

General principle(Articulation sub-assembly)

Objective: up and downstream holes must be well aligned.

<-> We assemble the 3 parts and we do the final drilling

Accuracy is OK (+/-0.01mm)

After that the 3 components of an articulation sub-assembly must stay

together!

CLIC

Mod

ule

mee

ting

, 22/

08/2

011

N. C

hrit

in (

EN

/MM

E)Cr

adle

s de

sign

for C

LIC

mod

ule

supp

ortin

g sy

stem

Suggested solutions for the active alignment

Rectangular trapezium principle

45.5

mm

3mm

0.1mm (second-rat motion)

Degrees of freedom

CLIC

Mod

ule

mee

ting

, 22/

08/2

011

N. C

hrit

in (

EN

/MM

E)Cr

adle

s de

sign

for C

LIC

mod

ule

supp

ortin

g sy

stem

Suggested solutions for the active alignment

Flexible components (blades) are used for kinematic pivot connections where we usually need standard pivots components

Example:-Blue square shape fixed-Red square shape connected to the cradle-70N radial force (2x for trapezium)-4000N vertical force-2.1mm radial displacement-750N/mm2 maximum stress in blades-Vertical movement is less than 0.05mm (compensated by the actuators)

Advantages:-High precision-No Friction (no stick-slip/Forces instantaneous transmission)-Good repeatability, suppression of the clearance and the hysteresis phenomenon-Monolithic component

CLIC

Mod

ule

mee

ting

, 22/

08/2

011

N. C

hrit

in (

EN

/MM

E)Cr

adle

s de

sign

for C

LIC

mod

ule

supp

ortin

g sy

stem

Suggested solutions for the active alignment

Articulation device: 3 parts assembly

Extension area

Compression area

Stress with total load+1º flexion~650N/mm2

Degrees of freedom

Beam axle

Total extension with 4000N load =17µm

CLIC

Mod

ule

mee

ting

, 22/

08/2

011

N. C

hrit

in (

EN

/MM

E)Cr

adle

s de

sign

for C

LIC

mod

ule

supp

ortin

g sy

stem

Suggested solutions for the active alignment

Fitting cradle-girderBeam

Shims

CLIC

Mod

ule

mee

ting

, 22/

08/2

011

N. C

hrit

in (

EN

/MM

E)Cr

adle

s de

sign

for C

LIC

mod

ule

supp

ortin

g sy

stem

Suggested solutions for active alignment

Radial flexible component

Longitudinal flexibles components

CLIC

Mod

ule

mee

ting

, 22/

08/2

011

N. C

hrit

in (

EN

/MM

E)Cr

adle

s de

sign

for C

LIC

mod

ule

supp

ortin

g sy

stem

Assembling(Suggested sequence)

Male articulation unit

Female articulation unit

Girder longitudinal sliding

Girder vertical moving down

Screwed fastening

Pre-alignment ±0.2mm

CLIC

Mod

ule

mee

ting

, 22/

08/2

011

N. C

hrit

in (

EN

/MM

E)Cr

adle

s de

sign

for C

LIC

mod

ule

supp

ortin

g sy

stem

Assembling(details)

CLIC

Mod

ule

mee

ting

, 22/

08/2

011

N. C

hrit

in (

EN

/MM

E)Cr

adle

s de

sign

for C

LIC

mod

ule

supp

ortin

g sy

stem

Assembling(Module removing)

Articulation disconnection (2x)

Vertical actuators+supports have to be removed (2x)

Auxiliary support

CLIC

Mod

ule

mee

ting

, 22/

08/2

011

N. C

hrit

in (

EN

/MM

E)Cr

adle

s de

sign

for C

LIC

mod

ule

supp

ortin

g sy

stem

Conclusion(Needs, constaints and suggestion)

20µm expected precision should be reachedCradles have to be considered as an integral parts of a girderSystem compatible with Boostec and Epucert girders

Accurate machiningSpecific material usingMeticulous of pre-assemblingPre-alignment importantDifficulties to reduce the overall dimensionsGap in-between girder very shortWeight variation is a very high constraint (vertical compensation?)