CLIC Module meeting, 22/08/2011 N. Chritin (EN/MME) Cradles design for CLIC module supporting system (EDMS 1158277) General principle Main inputs an requirements Suggested solutions for the alignment Assembling Conclusion
CLIC Module meeting, 22/08/2011 N. Chritin (EN/MME) Cradles design for CLIC module supporting system (EDMS 1158277) General principle Main inputs an.
Jan 29, 2016
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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?)
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