3 Machine Specific Requirements: The new Magnetic Particle Inspection Machine shall be capable of inspecting the outer surface and the internal surface of the 155mm M284, M776, M199 cannon breeches manufactured at the Watervliet Arsenal.3.1.1 General Physical Requirement: The Magnetic Particle unit complete with: ? Maximum current output 6,000 amps FWDC ? Demagnetization - Reversing DC ? 30in Head Opening ? Digital Ammeter with ?hold? feature ? Infinitely variable current control ? 30in Coil ? Stainless Steel Tank 58in L x 47in W, V shape stainless tank with sufficient pitch angle, mesh screens, and dust covers? Hardwood Grilles ? Foot switch operation ? air chuck ? Full Panels ? Louvered ? Hip Bar ? Powered rotary turn table 500 lb. capacity (safety payload up to 1500lbs.)? 30in diameter coil to be raised and lowered by manual pneumatic valve.? 2in diameter aluminum thru conductor to be raised and lowered by manual pneumatic valve. Thru conductor will manually pivot horizontally for rear storage after use. ? A overhead 500 lb. hoist/trolly will be supplied. ? Full curtain inspection enclosure with REL C4 magnum LED black light and 1000 CFM roof extraction fan. ? Accessory including Keto ring, keto ring CAL fixture, Gould-Bass MD-220 Hall Effect Magnetic Field Strength Meter, and 2 handheld cordless dual white / UV-A LED lights? Voltage 460VAC, 60HZ, 3 phase 200 Amps, Four - No. 4 AWG 3.1.2 Performance Characteristics Magnetizing Output Current (maximum): 6000 DC Control Setting: Infinite adjustment. Regulation: Electronic Rectification: Silicon Controlled Rectifiers (SCRs) Demagnetization Output DC Mode: 6,000 amperes (maximum) alternating polarity ramped to zero amperes Range of Automatic Timer DC Magnetization: 1/6 to 1 seconds ( second normal) DC Demagnetization: 15 to 40 seconds (30 seconds normal) Manual Timing: Manual operation (Remote cable must be used for manual timing) (Terminal cutout will disconnect unit if overheated.) Duty Cycle At 100% Rated Output: .5 seconds ON, 4 minutes OFF At 40% Rated Output: 10 seconds ON, 3 minutes OFF Thermal Cut Out: Disconnects unit if overheated Convenience Outlet: 115V AC, 60 Hz, 5 amperes Weight: 1150 pounds (approximate) Dimensions (Overall) Length: 136 inches Width: 111 inches Height: 112 inches 3.1.2 Detail Description 1. Constructed of a rigid steel framework with full louvered panel finish. 2. Maximum current output is 6,000 amperes FWDC in the conventional mode. 3. Complete with automatic reversing DC demagnetization. 4. Complete with (quick break) circuitry to ensure maximum residual field and maximum repeatability of inspection results. 5. Complete electronic controls including self-indicating plug-in modules for reliability and ease of maintenance. The electronic controls also provide a very fast response time of only 8 milliseconds, i.e. time taken for the magnetizing current to reach the desired level.6. Complete with infinitely variable, current control current selection between zero and maximum output. 7. Fitted with digital readout meter with L.E.D. display, accurate to 1%. This meter has a (hold and display) feature whereby the magnetizing current level is shown and held on display until the next magnetizing shot. The meter is also fitted with a current assurance light which illuminates to show magnetizing current flowing through the component. 8. On the control panel of the unit are mounted all the various switches for choice of current, magnetization or demagnetization, and for contact or coil method. 3.1.3. Conventional Magnetization or Demagnetization In the conventional mode parts can be magnetized in the longitudinal direction and the circumferential direction. The field is applied to the part by either clamping between the head and tail stock and firing a half second current shot through it, or by still retaining the part in the head and tail stock, moving the coil into position, and then energizing the coil. The conventional mode can be carried out with FWDC current.3.1.4 Enclosure: It shall block light such that the inside of the enclosure does not exceed 2 footcandles of brightness. The enclosure shall include a large ventilation fan. The enclosure shall come equipped with a white light, 2 handheld cordless dual white and UV-A LED lights that meet ASTM E1444 and E3022. A calibrated digital radiometer in accordance with ASTM E1444 and E2297-23 for measuring UV in w per cm visible light in foot candles shall be supplied. A main control panel with white light and fan control.3.1.5 Magnetic Particle Solution System: The machine shall come equipped with a minimum 30-gallon stainless steel tank for the magnetic particle solution. A pump system shall recirculate and agitate the solution such that the magnetic particles will not accumulate or settle during operation. The agitation system shall allow the magnetic particle solution to remain within 3% of theoretical level during an 8 hours continuous runtime. The machine shall come equipped with a fluid catch tray to collect the magnetic particle solution that is applied to the workpiece. The machine shall come equipped with a spray nozzle/hose located in the inspection enclosure. The spray nozzle shall be hung above the catch tray when not in use. The magnetic particle solution shall not spill or splash onto the floor during normal operation. The machine shall have a secondary catch pan to catch fluid in case of a leak in the main catch pan. This pan shall have a readily accessible drain but does not need to tie into the recirculation system.3.2 Machine Control System: The machine?s control system shall be located within the inspection enclosure and at the inspection area. 3.2.1 Control Features: ? Machine On Off using the emergency stop button.? Emergency Stop? Workpiece Magnetization/Demagnetization? Pump System On Off? Fan On/Off? White Light On Off? Digital Current Meter Display on control panel.? Infinitely Variable Current Control? Adjustable Shot Time 3.1 Safety Features: E-Stops at inspection station area of machine3.3.2 Digital Current Meter Display: The digital current meter display shall be accurate to 10%. The meter shall have a ?hold and display? feature that displays the magnetizing current level until the next magnetizing shot. The meter shall be fitted with an indicator light that illuminates to show when magnetizing current has flowed through the workpiece.3.3.3 Diagnostic Capabilities: the machine unit shall be equipped with diagnostic capabilities covering the mag control boards.3.4 Requirements for Demonstration of Conformance:3.4.1 Certification of Completeness: The contractor shall provide written certification that the machine is complete, has been properly calibrated, and visually examined for appearance, workmanship, maintainability, and completeness, including all specified system, and accessories.3.4.2 Test of Conformance to Specified Workpiece: The contractor shall perform a magnetic particle inspection on a cannon breech if requested. The machine shall be observed for proper function and compliance with the requirements of this specification. 3.4.3 Additional Testing: If requested the contractor will demonstrate or verify the machine compliance with any requirement in this specification.3.4.4 Provision of Materials and Equipment for Preliminary and Final Acceptance Testing:3.4.4.1 Workpieces: All workpieces to be tested as required in paragraph 3.4.2 shall be provided by Yuma Proving Ground.3.4.4.2 Magnetic Particle Solution: The magnetic particle solution shall be provided by the contractor for the preliminary acceptance and by Yuma Proving Ground for final acceptance.4 Quality Assurance Provisions:4.1 Responsibility for Inspection: The contractor shall be responsible for performing all certifications and tests required in paragraph 3.4 and shall provide such materials, supplies and equipment as specified.4.2 Preliminary Acceptance Inspection: Preliminary acceptance inspection by Yuma Proving Ground level 3 NDT expert shall occur at the contractor?s facility prior to machine shipment to Yuma Proving Ground and shall consist of the certifications and tests specified in paragraph 3.4. When the certification of conformance is completed, the contractor shall provide no less than 15 calendar days notice to the Yuma Proving Ground Contracting Officer that the machine is ready for the preliminary acceptance inspection.4.2.1 Re-inspection Provisions: If, during the course of preliminary acceptance inspection deficiencies are disclosed which cannot be satisfactorily corrected during this visit, preliminary acceptance will be withheld and the contractor will be required to take corrective actions. In such cases, the Yuma Proving Ground POC reserves the right dispatch Yuma Proving Ground representatives to observe a re-inspection. 4.3 Final Acceptance Inspection: Final inspection and acceptance of the machine shall be after installation at Yuma Proving Ground. At this time the machine shall again be subjected to, and required to pass, the test procedures specified in paragraph 3.4. 4.4 Warranty: Upon final acceptance of the machine a Standard Commercial Warranty shall commence for the duration of a one-year warranty covering parts and labor and five-year warranty covering Frame and Tank to include as a minimum, parts and labor for the duration of the warranty, at no cost to the Government. The 1-year period shall commence from the date of notification by the Contracting Officer of the final acceptance. Final acceptance is defined as the act of an authorized representative of the Government, by which the Government assumes ownership of existing supplies/equipment and/or approves specific services rendered, as partial or complete performance of the contract (i.e. testing, training, and delivery of all required technical documentation). 5 Preservation, Packaging and Delivery Instructions: The contractor shall utilize standard commercial methods of preservation and packaging appropriate for machine tools and acceptable to commercial carriers. As a minimum, all areas susceptible to damage from exposure to the elements shall be preserved and/or packed to prevent damage. The machine and equipment shall be blocked, braced and skidded to prevent damage during transport and to facilitate handling, loading and unloading. The contractor shall be responsible for ensuring that the machine and equipment are delivered to Yuma Proving Ground in good condition and shall retain this responsibility until the machine and equipment are offloaded at Yuma Proving Ground by the responsible parties.
