F.E.T.S. RFQ Support Structure
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F.E.T.S. RFQ Support Structure by Peter Savage 21 ST October 2009. The welded RFQ section support frame. Made from box section mild steel. EN24 flat blocks x 2 EN24 vee blocks x2. Tops of strips and bottoms of feet to be machined flat and parallel. Total weight = 60kg.

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F.E.T.S. RFQ Support Structure

by Peter Savage

21ST October 2009


The welded RFQ section support frame

Made from box section mild steel

EN24 flat blocks x 2

EN24 vee blocks x2

Tops of strips and bottoms of feet to be machined flat and parallel.

Total weight = 60kg




Stress and deformation due to weight of RFQ

Nodes: 22500

Elements: 9857

Quarter load: 75kg (300/4)

Load applied: Top faces of pads

Support 1: Frictionless at 2 symmetry planes.

Support 2: Fixed under foot

Material: Structural steel

Mass: 60kg

Results:

Total deformation: 0.0027 mm

Max equ. stress: 12MPa

Safety factor: 20


The kinematics assembly

Total weight = 12kg


The kinematic mount for the RFQ section

Screw jacks allow for RFQ height adjustment and tilt by resting in:

cone – allows rotation only

flat – allows movement in horizontal plane

vee – allows movement in one axis

2

3

Springs reduce judder when re-positioning RFQ sections

1

Complete kinematic assembly can be positioned by adjusting these screws


RFQ welded steel support cradle

Total weight = 22kg

Cradle must:

Support the RFQ section

Allow RFQ section to be mounted to the kinematics

Allow the RFQ section to be lifted by crane.


Cradle + kinematics + main support

Here the cradle is shown placed onto the kinematic system which in turn sits on the main frame. To adjust for height or tilt the screw jacks must first be unlocked by undoing the 3 nuts shown.

To move the entire kinematic assembly in the horizontal plane these four nuts must first be undone


+/- 10mm

+/- 10mm

+/- 10mm

+/- 10mm

+/- 10mm


Case1: Under weight of RFQ

Nodes: 31838

Elements: 12022

Half load: 150kg

Load applied: Top of dummy RFQ.

Support 1: Frictionless at symmetry plane.

Support 2: Fixed at screw jack domes.

Material: Structural steel

Mass: 22kg (cradle + jacks)

Results:

Total deformation: 0.007 mm

Max equ. stress: 11MPa

Safety factor: 22


Case 2: Lifting RFQ

Nodes: 31838

Elements: 12022

Half load: 150kg

Load applied: Under hooks

Support 1: Frictionless at symmetry plane.

Support 2: Fixed at dummy RFQ top (not shown).

Material: Structural steel

Mass: 22kg (cradle + jacks)

Results:

Total deformation: 0.007 mm

Max equ. stress: 10MPa

Safety factor: 25





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