Contract notice
Section I: Contracting
authority
I.1) Name and addresses
UNIVERSITY OF SHEFFIELD
RC000667
THE UNIVERSITY OF SHEFFIELD,WESTERN BANK
SHEFFIELD
S102TN
UK
Contact person: Rachel Hirst
Telephone: +44 1142157590
E-mail: r.e.hirst@sheffield.ac.uk
NUTS: UKE32
Internet address(es)
Main address: https://www.sheffield.ac.uk/
I.3) Communication
Access to the procurement documents is restricted. Further information can be obtained at:
https://in-tendhost.co.uk/Sheffield
Additional information can be obtained from the abovementioned address
Tenders or requests to participate must be sent electronically to:
https://in-tendhost.co.uk/Sheffield
I.4) Type of the contracting authority
Body governed by public law
I.5) Main activity
Education
Section II: Object
II.1) Scope of the procurement
II.1.1) Title
Short Pulse Laser
Reference number: 4087/AMRC/CK/24
II.1.2) Main CPV code
42000000
II.1.3) Type of contract
Supplies
II.1.4) Short description
This laser will replace the SPI redPOWER QUBE 2kW continuous-wave laser currently in the Factory 2050 laser cell. Two applications are targeted: further cutting trials with thin sheets of electrical steel for the production of electrical machine laminations, and high rate cutting of CFRP panels, initially to produce perforations.
For the first of these, remote laser cutting is being investigated as an alternative to traditional gantry-mounted fusion laser cutting. The perceived benefits of this method of cutting are that the cut rate is increased (the scanner is capable of speeds of up to 8,000 mm/s) and that the thermal damage (measured in terms of electromagnetic performance, not physical material properties) is reduced, both with reference to the traditional fusion cutting baseline. Materials being investigated are high-silicon steel (e.g. NO20) and cobalt iron (e.g. Hiperco50 - 49% cobalt content). Sheet thicknesses could range from 0.35 mm down to 0.1 mm.
Previously, a continuous-wave (CW) laser has been used in this investigation. This has been shown to produce an increased cut rate but creates more thermal damage to the material in the region of the cut. This is a result of firstly there being significant melting of the material, as well as vaporisation, and the fact that the molten material is not ejected from the component surface (the vaporisation/ablation is not sufficiently energetic to eject it).
A new short pulse laser is sought to overcome these issues. This new laser shall be capable of removing material in a way that produces reduced thermal damage (HAZ) compared to a traditional laser system. Secondly, the new laser should be capable of cutting the steel sheets at a rate such that the resultant cut rate of the system is greater than that for a traditional gantry laser system. For the purposes of this tender, consider this to be 300 mm/s.
The second application addresses a requirement to put arrays of holes into aerospace-grade carbon fibre reinforced polymer (CFRP) composite panels typically associated with primary structure components, up to 3 mm thick. These holes are required to be produced at high rate (> 10 holes per second) without affecting any visible heat affected zone (HAZ) within the fibre or matrix surrounding the through-hole entry/exit/bore surfaces in the part being laser processed. Thermal damage is typically seen through either a charring/blackening or other discoloration on a surface and/or removal of additional material in the zone surrounding the intended hole's removal zone, e.g. 100 microns of top ply material removed away from the primary hole circumference on entry side.
These high-rate through holes are expected to be percussion drilled to maximise productivity and can be produced in parallel to manage thermal dissipation. The through holes required would range in size from 0.1 mm to 2 mm in diameter with a diameter tolerance of ±10%. The AMRC's existing optics can focus the spot across this range, however, alternative solutions to enable entry diameters, with minimal taper at high rate within this range are welcomed. The laser shall be capable of meeting this baseline. An ability to produce holes up to 25.4 mm in diameter using the trepanning method is also considered desirable.
The laser will be a direct replacement for the existing CW laser. It is intended that the existing ancillary equipment will be used for the replacement as much as possible.
Tender Process and Documentation:
This procurement is an open procedure.
The ITT can be downloaded by registering and expressing your interest on the University`s e-tendering system https://in-tendhost.co.uk/Sheffield
If you have any questions or comments in relation to this tender they must be submitted via the In-tend System, this can be accessed at https://in-tendhost.co.uk/Sheffield
Completed tenders must be returned through the same e-tendering system.
Closing date for receipt of tenders: 3rd of July 2024 at 12 noon (UK time)
II.1.5) Estimated total value
Value excluding VAT:
250 000.00
GBP
II.1.6) Information about lots
This contract is divided into lots:
No
II.2) Description
II.2.2) Additional CPV code(s)
38636100
38636110
II.2.3) Place of performance
NUTS code:
UKE
Main site or place of performance:
AMRC Factory 2050
Sheffield Business Park
Europa Avenue
Sheffield
S9 1ZA
II.2.4) Description of the procurement
This laser will replace the SPI redPOWER QUBE 2kW continuous-wave laser currently in the Factory 2050 laser cell. Two applications are targeted: further cutting trials with thin sheets of electrical steel for the production of electrical machine laminations, and high rate cutting of CFRP panels, initially to produce perforations.
For the first of these, remote laser cutting is being investigated as an alternative to traditional gantry-mounted fusion laser cutting. The perceived benefits of this method of cutting are that the cut rate is increased (the scanner is capable of speeds of up to 8,000 mm/s) and that the thermal damage (measured in terms of electromagnetic performance, not physical material properties) is reduced, both with reference to the traditional fusion cutting baseline. Materials being investigated are high-silicon steel (e.g. NO20) and cobalt iron (e.g. Hiperco50 - 49% cobalt content). Sheet thicknesses could range from 0.35 mm down to 0.1 mm.
Previously, a continuous-wave (CW) laser has been used in this investigation. This has been shown to produce an increased cut rate but creates more thermal damage to the material in the region of the cut. This is a result of firstly there being significant melting of the material, as well as vaporisation, and the fact that the molten material is not ejected from the component surface (the vaporisation/ablation is not sufficiently energetic to eject it).
A new short pulse laser is sought to overcome these issues. This new laser shall be capable of removing material in a way that produces reduced thermal damage (HAZ) compared to a traditional laser system. Secondly, the new laser should be capable of cutting the steel sheets at a rate such that the resultant cut rate of the system is greater than that for a traditional gantry laser system. For the purposes of this tender, consider this to be 300 mm/s.
The second application addresses a requirement to put arrays of holes into aerospace-grade carbon fibre reinforced polymer (CFRP) composite panels typically associated with primary structure components, up to 3 mm thick. These holes are required to be produced at high rate (> 10 holes per second) without affecting any visible heat affected zone (HAZ) within the fibre or matrix surrounding the through-hole entry/exit/bore surfaces in the part being laser processed. Thermal damage is typically seen through either a charring/blackening or other discoloration on a surface and/or removal of additional material in the zone surrounding the intended hole's removal zone, e.g. 100 microns of top ply material removed away from the primary hole circumference on entry side.
These high-rate through holes are expected to be percussion drilled to maximise productivity and can be produced in parallel to manage thermal dissipation. The through holes required would range in size from 0.1 mm to 2 mm in diameter with a diameter tolerance of ±10%. The AMRC's existing optics can focus the spot across this range, however, alternative solutions to enable entry diameters, with minimal taper at high rate within this range are welcomed. The laser shall be capable of meeting this baseline. An ability to produce holes up to 25.4 mm in diameter using the trepanning method is also considered desirable.
The laser will be a direct replacement for the existing CW laser. It is intended that the existing ancillary equipment will be used for the replacement as much as possible.
Tender Process and Documentation:
This procurement is an open procedure.
The ITT can be downloaded by registering and expressing your interest on the University`s e-tendering system https://in-tendhost.co.uk/Sheffield
If you have any questions or comments in relation to this tender they must be submitted via the In-tend System, this can be accessed at https://in-tendhost.co.uk/Sheffield
Completed tenders must be returned through the same e-tendering system.
Closing date for receipt of tenders: 3rd of July 2024 at 12 noon (UK time)
II.2.5) Award criteria
Price is not the only award criterion and all criteria are stated only in the procurement documents
II.2.6) Estimated value
Value excluding VAT:
250 000.00
GBP
II.2.7) Duration of the contract, framework agreement or dynamic purchasing system
Duration in months: 3
This contract is subject to renewal: No
II.2.9) Information about the limits on the number of candidates to be invited
II.2.10) Information about variants
Variants will be accepted:
No
II.2.11) Information about options
Options:
No
II.2.13) Information about European Union funds
The procurement is related to a project and/or programme financed by European Union funds:
No
Section IV: Procedure
IV.1) Description
IV.1.1) Type of procedure
Open procedure
IV.1.8) Information about Government Procurement Agreement (GPA)
The procurement is covered by the Government Procurement Agreement:
Yes
IV.2) Administrative information
IV.2.2) Time limit for receipt of tenders or requests to participate
Date:
03/07/2024
Local time: 11:00
IV.2.4) Languages in which tenders or requests to participate may be submitted
EN
IV.2.7) Conditions for opening of tenders
Date:
03/07/2024
Local time: 12:00
Section VI: Complementary information
VI.1) Information about recurrence
This is a recurrent procurement:
No
VI.2) Information about electronic workflows
Electronic ordering will be used
Electronic invoicing will be accepted
Electronic payment will be used
VI.4) Procedures for review
VI.4.1) Review body
The University of Sheffield
Sheffield
S10 2TN
UK
VI.5) Date of dispatch of this notice
03/06/2024