eMeasurematics is looking for “coil transfer car” with coil weight handling capacity of ~35T for ‘coil yard management system’ (CYMS)
Keyword：coil transfer car Time：2021-5-14 10:19:39
Introduction
eMeasurematics is looking for “coil transfer car” with coil weight handling capacity of ~35T for ‘coil yard management system’ (CYMS). The CYMS is coming for HSM-1 & and HSM-2 (new mill). The transfer cars are required for both the mills area, but, at present this enquiry is only for HSM-1, where 5nos of transfer cars are proposed to come.
The layout of mill area is shown in attached figure.
The Yard consist of 3 Bays, MN, NIQ1 and Q1P1 respectively.
Total 5 transfer cars are to be installed, TC1, TC2, TC3, TC4 and TC5. The travel length of each transfer car is as under,
TC1: 52 meters
TC2: 52 meters
TC3: 122 meters
TC4: 52 meters
TC5: 52 meters
All the above cars are single coil carrying cars.
The TC1, TC2, TC4 and TC5 run between the MN and Q1P1 bay, whereas TC3 runs from the mill bay to the Q1P1 bay. All the cars are at normal yard level, with DSL arrangement for power connectivity to the drive.
The transfer control philosophy is depicted in figure below. The dark dotted line is in the scope of supplier. Remaining part is in the scope of eM. In general car shall accelerate to its full speed and decelerate after constant run to stop at defined location. eM supplied PLC will generate the motor start and stop command and drive shall stop at designated location. There are two nos of ‘Control Push button stations for facilitating the ground personnel operator to operate the transfer car locally.
Scope of Work:
1. Supply of 5 nos (Phase -1) transfer car as per specification given in Annexure-1
2. Supply of all erection material
3. Supply of commissioning spares
4. Supply of detail engineering document
5. Supply of rail foundation detail and pit dimensional detail
6. Erection supervision
7. Interfacing with buyers PLC
8. Installation of system including tuning of drive for smooth movement of Transfer car with and without load.
9. Commissioning of transfer car and performance test as indicated in specification.
10. Special Tools & Tackles : If any (to be provided by contractor)
TRANSFER CAR SPECIFICATION
PARAMETER | SPECIFICATION | |
Mechanical | ||
Weight carrying capacity | 35T | |
Car weight (estimated) | 6T | |
Car motive power arrangement | Geared motor. | |
Car platform sag | Without load With Load | |
Coil Dimension (mm) | 1000-1900 (OD), ID , 800-1500 (width) | |
V-Groove (Sloped flange) deck, for supporting coil | Both end | |
Coil placement on car | I parallel to track length. Ensure stable coil placement even with high jerk start/stop | |
Coil temp. | 4000C | |
Car travel distance | Max 130mts | |
Guaranteed travel time | 60 sec. for 60mts including acc. & dec. | |
Car speed | (avg.) 60mts/min (peak) 70mts/min | |
Car ace./deacc. | Better than 15cm/sec2 | |
Car end Buffer (set) | Both end (spring loaded) | |
Rail/wheel arrangement | ||
Rail gauge (center to center) and type | ||
Wheel material | Cast steel | |
Wheel dia. & type | ~400mm | |
Bearing type | Ball and roller Antifriction isolated bearings, with shaft grounding rings -- FAG, SKFmake | |
Motor shafts/wheel axel should be connected to gear extension shafts through flexible shock absorbing couplings. Any other special coupling which can give better and more reliable service may be proposed | ||
Lubrication | Pl. indicate | |
Ground clearance required | Wheel center to ground – Car (driving shaft/gear box) to ground - | |
Track cleaning | In front of all wheels | |
PARAMETER | SPECIFICATION | |
Electrical & Control requirement Squirrel-Cage Induction Motor (Inverter duty) Operating temperature 55 deg C and in one case it will be high since same will be carrying coil with temperature of 400deg C+ Total no of Transfer Car | ||
No of motors | 2 sets. | |
No. of Phases | 3 | |
Frame Designation | 180M | |
Noise Standard | IS:12065 | |
Protection IS:4691 | IP 55 | |
Vibration Standard | IS:12075 | |
Rated Output torque | Full load torque of motors to be 1.25% higher than the Maximum demanded load torque at creep speed of 3% | |
Pull out torque | Not less than 2.25 (Two point two five) times the full load torque of motors | |
Duty | S1/S4 (intermittent operation) | |
Motor Weight (approx) | ----- kg | |
No. of Poles | 4 | |
Rated Voltage | 415 V | |
Rated Frequency | 50 Hz | |
Efficiency Full load | 91.2% | |
Power factor Full load | 0.84 |
Power factor 1/2 load | 0.74 | |
Max. Temp. Rise | 90°C | |
Acceleration Time | 4 sec. from 0 to full speed | |
Insulation Class | F/H | |
Cooling IS:6362 | IC0411 | |
Efficiency 1/2 load | 90.5% | |
Voltage Variation ± | 10% | |
Frequency Variation ± | 5% | |
Combined (Volt. & Freq.) Variation ± | 10% | |
Lifting Eyebolt IS:4190 | M12 | |
PARAMETER | SPECIFICATION | |||
Drive : Capable of speed and full torque control. The speed during final positioning (within 300 mm) shall not exceed 3% of the motor speed. | ||||
Distance between drive panel & DSL one end | ~67mts (inclusive of DSL length) Pl. ref layout drawing. | |||
Ambient Temperature | Continuous 50 deg max 55deg | |
Motor breaking | (i) Main braking by means of frequency speed control of motor down to 0 (regenerative braking). (ii) Automatic DC electro-magnetic brake for each motor drive. (iii) Double (2) brake discs. It is proposed (supplier can propose alternative also), that the electromagnetic brakes shall be of DC type. The brakes shall automatically apply all the brakes immediately in the event of the emergency stoppage, interruption or failure of electrical power supply, irrespective of position. The brakes shall be designed to exert a torque equal to 1.5 times the full load torque of motors. | |
Motor/Drive control requirement | Drive shall capable for automatic control of long travel motion of based on field mounted proximity sensor and/or continuous position feed back from laser sensor. The drive also able to be operated from local station (2 notch forward and reverse motion and emergency stop with a facility of local & auto-mode selection) The proposed scheme of LT motion control with scope division is shown in diagram Further detain will be done during engineering discussion. | |
Safety requirement | Motor stop through emergency stop or activation of safety barrier. | |
Laser based | ||
OTHERS | Lifting hole/hook and hoisting hole/hook for loading and unloading. |
Please define following with your offer
i. Basic drawing of transfer car indicating clearly the basic dimension with all side clearance required.
ii. Wheel (individual) load without impact
iii. Wheel (individual) load with impact Consider the coil is released at a height of 50mm
iv. Car wheel dia.
v. Type of wheel/structure suspension
vi. Total wheel torque requirement
vii. Wheel load (with full load)
viii. Pit size required pl. provide basic detail with all side clearance
ix. Basic Foundation detail
x. Make of motors/drive etc. : Proffered makes are Siemens, ABB, Schneider
xi. Make of Bearing/gear Box any other major part
