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16" (406mm) COIL TO COIL HORIZONTAL BRIGHT ANNEAL FOR STAINLESS STRIP
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Stock #
113231
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Used
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16" (406mm) COIL TO COIL HORIZONTAL BRIGHT ANNEAL FOR STAINLESS STRIP Our stock number: 113231
SPECIFICATIONS: PURPOSE: COIL TO COIL HORIZONTAL FURNACE TO BRIGHT ANNEAL STAINLESS STEEL STRIP IN A CONTROLLED HYDROGEN/NITROGEN ATMOSPHERE USING A WEB LOOP TENSION CONTROL SYSTEM TO PREVENT STRETCHING AND SHAPE DEFORMITY. MAXIMUM WIDTH OF STRIP: 16" (406MM) THICKNESS OF STRIP: 0.005" - 0.060" (0.127MM - 1.5MM) MAXIMUM OPERATING TEMPERATURE: 2250 DEG. F (1230 DEG. C) MAXIMUM COIL WEIGHT: 4,000 LBS. (1815 KG) LINE SPEED: 0-80 FPM (0-24M/MIN.) PROGRAM SPECIFICATIONS: ONE (1) SPECIAL CONTROLLED ATMOSPHERE, HORIZONTAL, ELECTRICALLY HEATED CONTINUOUS STRIP ANNEALING FURNACE LINE. MAXIMUM FURNACE OPERATING TEMPERATURE 2250 DEG. F (1230 DEG. C). MATERIAL TO BE ANNEALED: STAINLESS STEEL STRIP VARYING IN THICKNESS FROM 0.005" (0.127MM) TO 0.060" (1.5MM) AND MAXIMUM WIDTH OF 16" (406MM). CYCLE: HEAT TO 2200 DEG. F (1200 DEG. C), COOL TO APPROXIMATELY 150 DEG. F (65 DEG. C) IN THE FAST COOL SECTION. CAPACITY: THE EQUIPMENT WILL HAVE SUFFICIENT HEATING AND COOLING AVAILABLE TO CONTINUOUSLY PROCESS 900 LBS. (400 KG/HR.). PER HOUR OF 14" (355MM) STRIP UNDER CYCLE SPECIFIED ABOVE. THE ABOVE REFERS ONLY TO THE AMOUNT OF HEATING AND COOLING AVAILABLE. THE ACTUAL CAPACITY WILL DEPEND ON THE NATURE OF THE MATERIAL BEING HEATED, ITS ABILITY TO ABSORB AND RELEASE HEAT, THE WIDTH AND GAUGE OF THE STRIP BEING ANNEALED AND THE ACTUAL HEATING AND COOLING CYCLE BEING EMPLOYED. CONDITION OF THE MATERIAL: THE EQUIPMENT DESCRIBED HEREIN WILL PROVIDE FOR CLEAN OR BRIGHT ANNEALING OF THE STAINLESS STEEL STRIP, PROVIDING THAT THE MATERIAL BEING ANNEALED IS CLEAN AND NON-OXIDIZED. SOME TYPE OF STAINLESS STEEL MAY LOOSE A CERTAIN AMOUNT OF LUSTER IN THE ANNEALING OF THE STAINLESS STEEL STRIP, BUT THE MATERIAL WILL BE DELIVERED FROM THE EQUIPMENT IN NON- OXIDIZED CONDITION, DEPENDING ON THE QUALITY AND QUANTITY OF THE PROTECTIVE GAS ATMOSPHERE. CONTROLS: NEMA 12 FLOOR MOUNTED ELECTRICAL ENCLOSURE WITH PLC CONTROLLER WITH DIGITAL INTERFACE, AC/DC DRIVES, PANEL MATE TOUCH SCREEN OPERATOR INTER PHASE, PC BASED DATA LOGGING SYSTEM, WITH COMPLETE SOFTWARE FOR SEQUENCING AND CONTROL OF ALL SYSTEM LOGIC. GENERAL ARRANGEMENT: THIS SECTION DESCRIBES GENERAL DIMENSIONS OF THE FURNACE SYSTEM. PLEASE NOTE THAT THE ACTUAL LENGTH WILL DEPEND ON THE OPTIONS SELECTED AND SPECIFIED BY THE PURCHASER. 1. DRIVEN UNCOILER WITH AC MOTOR, GEAR BOX AND ENCODER INSIDE DIAMETER OF COIL: 16" (406MM) MAXIMUM WEIGHT OF THE COIL: 4,000 LBS. (1815 KG) MAXIMUM COIL WIDTH: 16" (406MM) MANDREL SHAFT FACE WIDTH: 20" (508MM) EXPANSION RANGE: 15" TO 16" (381MM - 406MM) EXPANSION/COLLAPSE: HYDRAULIC DRIVE: DRIVEN BY AC MOTOR LINE SPEED: 80 FPM MAXIMUM (24M/MIN.) BACK TENSION: BY 7.5 HP AC MOTOR AND GEAR BOX DESCRIPTION: THE UNCOILER RECEIVES AND HOLDS THE COIL FOR FEEDING INTO THE LINE ON UNDER PAY-OFF MODE. THE UNCOILER MANDREL HEAD WILL BE OF FOUR-SEGMENT WEDGE TYPE ASSEMBLY. THE SEGMENTS ARE ATTACHED TO THE SLIDING SLEEVE THROUGH A SERIES OF INTERLOCKING MACHINED WEDGE SURFACES. THE SEGMENTS WILL BE RESTRAINED FROM SLIDING SLEEVE BY A FLANGE ON THE MANDREL THROUGH A WEAR STRIP. A 4,000 LB. MAXIMUM WEIGHT COIL IS PLACED AND CENTERED ON THE MANDREL. THE UNCOILER IS EQUIPPED WITH HYDRAULIC EXPANSION FEATURE TO HOLD THE COIL. A 7.5 HP AC MOTOR AND GEAR BOX PROVIDES BACK TENSION. THE MANDREL SHAFT ASSEMBLY IS MOUNTED ON A FABRICATED AND PRECISION-MACHINED HOUSING ON ANTI-FRICTION BEARING. THE BEARING END COVERS ARE PROVIDED WITH GREASE NIPPLES FOR LUBRICATION OF BEARINGS. THE ACTUATION OF THE MANDREL HEAD EXPANSION AND COLLAPSE WILL BE BY HYDRAULICALLY OPERATED SCREW MECHANISM FROM THE FRONT SIDE OF THE HEAD ASSEMBLY. 2. BANNER ENGINEERING ULTRA SONIC COIL DIAMETER SENSOR 3. ABSOLUTE 1024 PULSE ENCODER 4. TENSION BRIDLE # 1 (AT ENTRY SIDE): TYPE OF BRIDLE: S - TYPE NO. OF ROLLS: TWO DIAMETER OF THE ROLLS: 16" (406MM) FACE WIDTH OF ROLLS: 16" (406MM) LINE SPEED: 80 FPM (24M/MIN.) ROLL DRIVE: BY 5 HP, 1500 RPM, DC MOTOR WITH GEAR BOX. DESCRIPTION: THE TENSION BRIDLE WILL HAVE TWO BRIDLE ROLLS MOUNTED ON A COMMON BASE FRAME. BOTH THE ROLLS ARE DRIVEN BY A 5 HP DC MOTOR THROUGH A HELICAL REDUCTION GEARBOX. THE POLYURETHANE COVERED ROLLS ARE MOUNTED ON THE BASE FRAME ON ANTI-FRICTION BEARINGS. 5. DEFLECTOR ROLL: NEXT TO THE TENSION BRIDLE ROLL # 1, A DEFLECTOR ROLL IS PROVIDED IN FRONT OF THE FURNACE ENTRY CHAMBER. THE DIAMETER OF THE ROLL IS 4" AND IT IS A TUBULAR CONSTRUCTION MOUNTED ON BEARING BLOCKS ON ANTI-FRICTION BEARINGS. THE BARREL OF THE DEFLECTOR ROLL IS GROUNDED AND HARD CHROME PLATED. 6. TENSION LOAD CELLS # 1: THIS IS USED TO GIVE THE TENSION FEEDBACK BETWEEN THE ENTRY BRIDLE AND DEFLECTOR ROLL AT THE END OF FURNACE. IT IS DESIGNED TO CONTROL THE STRIP TENSION IN THE FURNACE LOOP. A TENSION MEASURING LOAD CELLS ARE PROVIDED UNDER THE DEFLECTOR ROLL IN FRONT OF THE TENSION BRIDLE # 1 AT THE DELIVERY SIDE OF THE LINE TO MEASURE AND CONTROL PRECISELY AND PERMANENTLY TO ALLOW FOR A RELIABLE THE REFERENCE VALUE, THERE ARE IRREGULARITIES IN THE MATERIAL BEING TREATED IN THE PRODUCTION RUN AS SUCH. THESE IRREGULARITIES WILL BE CORRECTED IMMEDIATELY BY THIS TENSION MEASURING LOAD CELLS. THIS UNIT CONSISTS OF THE WEB TENSION MONITOR (LOAD CELLS) MOUNTED ON THE BRACKETS OF A ROLL. THE WEB TENSION MONITOR DETERMINES THE ACTUAL TENSION VALUES, CONVERTED INTO LINEAR, OVERLOAD-PROOF ANALOG SIGNALS, ARE PASSED ON TO THE DC MOTOR CONTROLLER AND AMPLIFIED. THE SIGNALS HAVE A HIGH ZERO POINT CONSTANCY. THE PLC COMPARES THE REFERENCE VALUE WITH THE ACTUAL VALUE AND THE LOGIC EMITS A SIGNAL TO THE DC MOTOR CONTROLLER. 7. CHARGE END GAS ATMOSPHERE ENTRY SECTION: A SPECIAL ATMOSPHERE SEAL ASSEMBLY, INCLUDING GAS TIGHT STEEL HOUSING OF WELDED CONSTRUCTION WILL BE PROVIDED. THE HOUSING WILL INCORPORATE A SEAL SYSTEM INCORPORATING FELT PADS WITH ONE ROLL EACH ABOVE AND BELOW THE STRIP ARRANGED FOR EASY ADJUSTMENT OR REPLACEMENT. IN ADDITION, A FABRICATED NITROGEN CURTAIN SYSTEM WILL BE INCORPORATED ADJACENT TO THE SEALS TO MINIMIZE AIR INFILTRATION AND MAINTAIN POSITIVE FURNACE PRESSURE. THERE WILL BE PROVISION FOR A WATER-JACKETED EXTENSION ADJACENT TO THE CHARGING END OF THE FURNACE-HEATING CHAMBER. THE EXTENSION WILL HAVE INNER AND OUTER SHELLS OF GAS TIGHT WELDED CONSTRUCTION. THE INNER AND OUTER SHELL WILL BE FABRICATED FROM 1/2" THICK T 316L ALLOY PLATES, REINFORCED AND SUPPORTED WHERE NECESSARY AND EQUIPPED WITH STAINLESS STEEL WATER INLET AND OUTLET FITTINGS FOR CONNECTION TO THE PLANT WATER SUPPLY AND DRAIN LINES. THE ENTRY CHAMBER AT PASS LINE WILL HAVE HIGH TEMPERATURE ALLOY ROLL COVERED WITH GRAPHITE TUBE. THE ISOSTATICALLY MOLDED GRAPHITE TUBE WILL BE OF HLM GRADE, 4.00" +/- .005" O.D. X 3.050" +/- .005" I.D. X 26" LONG WITH POLISHED SURFACE GRADE 890S. THE ROLL WILL BE DRIVEN BY A 1.5 HP AC MOTOR AND MATCHING GEAR BOX. 8. FURNACE: A 20 FT. LONG X 4 FT. 10" WIDE X 4 FT. HIGH HOT ZONE MADE OF 1/2" STEEL PLATE, WITH ELECTRICAL HEATING ELEMENTS KANTHAL K-A1 PROVIDING THE HEAT(240 KW, 240V, DELTA 2 IN SERIES). THERE IS FURNACE MUFFLE MADE OF HT ALLOY 600 18" X 16" X 17.5' LONG. THE FURNACE COVERING WILL BE COVERED ON THE UNDERSIDE WITH FIREBRICKS RATED TO 2600 DEGREES F TO MAINTAIN UNIFORM HEAT ENCLOSE IN THE HEAT CHAMBER ENCLOSURE. HIGH PURITY ALUMINA FIREBRICKS ON ALL SIDE CAPABLE OF WITHSTANDING 2,600 DEGREES F WILL LINE THE FURNACE. THE OPERATING TEMPERATURE WILL BE 2150 DEGREES F, WHICH WILL BE DIGITALLY CONTROLLED WITH PROCESS/CONTROL THERMOCOUPLES X 3 ZONE CONTROL AND DIGITAL TEMP. PID CONTROL SYSTEM. THE FURNACE WILL BE DESIGNED TO PREVENT ANY SCRATCH MARKS ON THE MATERIAL AND THE TENSION CONTROL SYSTEM WILL PREVENT STRETCHING OF THE MATERIAL IN THE HEAT ZONE. 9. JET COOLING SECTION: THE HOT ZONE IS FOLLOWED BY A 25 FT. LONG COOLING ZONE MADE OF 1/4" STEEL WITH THREE GRAPHITE TUBING COVERED DRIVEN ROLLS. THE JET COOL SECTION HAS 0.5 HP AC MOTOR DRIVEN GAS TIGHT BLOWER FAN X 3 WITH PROVISION FOR WATER COOLING. IT IS DESIGNED TO OPERATE IN EXTREME TEMPERATURE ENVIRONMENTS. CONTINUOUS WELDED HOUSINGS, SPECIAL BRACING AND CENTERLINE SUPPORTS ARE USED, TO ALLOW FOR THERMAL EXPANSION AND TO STRENGTHEN BLOWER RIGIDITY. IT HAS GAS TIGHT CONSTRUCTION AND HAS SHAFT SEALS, COOLING SECTION, SPECIAL BEARINGS AND OTHER FEATURES TO ALLOW FOR OPERATION AT HIGH TEMPERATURE. THERE IS ALSO PROVISION FOR HEAT EXCHANGER WITH ALUMINUN FINS. IT IS WATER COOLED WITH CIRCULATING WATER TO RAPIDLY COOL THE STAINLESS STEEL STRIP. PROCESS HYDROGEN AND PURGE NITROGEN IS INTRODUCED AT THE BEGINNING OF THE COOL ZONE VIA STAINLESS TUBING TO PREVENT OXIDATION. TEMPERATURE IS MONITORES BY K TYPE THERMOCOUPLE. THEY HAVE EXCELLENT LONG TERM OUTPUT STABILITY AT HIGH TEMPERATURES, TEMP. UP TP 1335 deg. c (2440 deg. f) AND HAVE LOW THERMAL DRIFT. HAZARDOUS AREA CERTIFIED DEW POINT TRANSMITTER TRANSMET IS (MITCHELL INSTRUMENT) IS USED TO MONITOR PROCESS DEW POINT. THE INTRINSICALLY SAFE TRANSMET I.S. CERAMIC DEWPOINT TRANSMITTER MEASURES DEW POINT OVER THE RANGE -100/+20 deg. c. IT IS DESIGNED FOR USE WITHIN THE FOLLOWING HAZARDOUS AREAS: CLASS i, DIVISION 1, GROUPS a, b, c & d t4 WHEN USED WITH AN APPROPIATE SAFETY BARRIER(s). THE TRANSMET I.S. IIS CONNECTED AS A 3-WIRE TRANSMITTER WITH A CURRENT SINK OUTPUT, WHICH CAN BE SWITCH SELECTED FOR EITHER 4-20ma or 0-20ma. THIS OUTPUT IS LINEAR OVER THE ENTIRE DEWPOINT MEASUREMENT RANGE, from -100/+20 deg. c dp. TRANSMET I.S. IS APPROVED AS AN INTRINSICALLY SAFE DEVICE FOR USE IN HAZARDOUS LOCATIONS 10. DISCHARGE END 11. AUTO EDGE WEB GUIDE SYSTEM 12. TENSION BRIDLE #2 type of bridle: s - type no. of rolls: two diameter of the rolls: 16" (406mm) face width of rolls: 16" (406mm) line speed: 80 fpm (24m/min.) roll drive: by 7.5 hp, 1500 rpm, dc motor. DESCRIPTION: THE TENSION BRIDLE WILL HAVE WO BRIDLE ROLLS MOUNTED ON A COMMON BASE FRAME. BOTH THE ROLLS ARE DRIVEN BY A 5 hp dc MOTOR THROUGH A HELICAL REDUCTION GEARBOX AND BULL GEAR. THE ROLLS ARE MOUNTED ON THE BASE DRAME ON ANTI FRICTION BEARINGS. THE ROLLS ARE COVERED WITH POLYURETHANE LINING. 13. TENSION LOAD CELL #2 WITH DEFLECTOR ROLL: NEXT TO A SET OF DEFLECTOR ROLLS ARE PROVIDED, SUPPORTED BY ROLL BEAARING AND TWO to 200 lbs. LOAD CELLS. THE DIAMETER OD THE ROLLS IS 3" AND IT IS A TUBULAR CONSTRUCTION MOUNTED ON BEARING BLOCKS ON ANTI FRICTION BEARINGS. THE BARREL OF THE ROLL IS GROUNDED AND HARD CHROME PLATED. THIS IS USED TO GIVE THE TENSION FEEDBACK BETWEEN THE BRIDLE AND RECOILER. TENSION MEASURING LOAD CELLS ARE PROVIDED TO MEASURE AND CONTROL WRAP TENSION PECISELY AND PERMANENTLY TO ALLOW FOR A RELIABLE PRODUCTION PROCESS. 14. AUTO EDGE WEB GUIDE SYSTEM WITH HYDRAULIC CYLINDER AND POWER PACK AT THE EXSIT END OF THE BRIDLE A DEFLECTOR ROLL WITH LOAD CELL IS PROVIDED, WHICH HAS A TUBULAR CONSTRUCTION MOUNTER ON BEARING BLOCKS ON ANTI FRICTION BEARINGS. THE BARREL OF THE DEFLECTOR ROLL IS GROUNDED AND HARD CHROME PLATED. 15. RECOILER SYSTEM: IT CONSIST OF A REGULAR MANDREL BASED RECOILER inside diameter of coil: 20"/24" (508mm/610mm) maximum weight of the coil: 5,000 lbs. (2268 kg) maximum coil width: 16" (406mm) mandrel shaft face width: 26" (660mm) expansion range: 20" to 24" (508mm - 610mm) expansion/collapse: hydraulic line speed: 125 fpm (38m/min.) drive motor: 15 hp, 0-750-1500 rpm, ac motor DESCRIPTION: IT IS USED TO WIND THE STRIP COMING FROM CLEANING LINE INTO A COIL FORM AND IS DESIGNED FOR UNDER WINDING. THE CAPACITY OF THE RECOILER IS 5000 LBS. AND DRIVEN BY A 15HP AC MOTOR THROUGH A GEARED COUPLING AND REDUCTION GEARBOX. THIS UNIT CONSISTS OF A FIXED BASE, MOVABLE HOUSING, MANDREL SHAFT ASSEMBLY AND A PUSHER PLATE. MOVABLE HOUSING IS MOUNTED ON THE FIXED FRAME ON MACHINED LUBRICATED GUIDE WAYS WITH REPLACEABLE WEAR STRIPS. FIXED BASE IS GROUTED ON FOUNDATION. THE ACTUATION OF THE MANDREL HEAD EXPANSION AND COLLAPSE WILL BE BY HYDRAULICALLY OPERATED MECHANISM FROM THE FRONT SIDE OF THE HEAD ASSEMBLY. THE MANDREL HEAD WILL BE OF FOUR-SEGMENT WEDGE TYPE ASSEMBLY. THE SEGMENTS ARE ATTACHED TO THE SLIDING SLEEVE THROUGH A SERIES OF INTERLOCKING MACHINED WEDGE SURFACES. THE SEGMENTS WILL BE RESTRAINED FROM SLIDING SLEEVE BY A FLANGE ON THE MANDREL THROUGH A WEAR STRIP. A PNEUMATICALLY OPERATED PUSHER PLATE IS PROVIDED TO UNLOAD THE COILS FROM THE MANDREL HEAD. THE LATERAL MOVEMENT OF THE RECOILER IS CONTROLLED BY AN AUTOMATIC OPTO-HYDRAULIC EDGE GUIDE SYSTEM TO AVOID TELESCOPIC WINDING OF COILS ON THE RECOILER. THE EDGE GUIDE SYSTEM MAINLY CONSISTS OF INFRARED SENSOR, DIGITAL AMPLIFIER, ELECTRO HYDRAULIC POWER UNIT, SERVO CENTER AND A HYDRAULIC CYLINDER. 15. HYDRAULIC POWER PACK & VALVE STAND: COMPLETE NECESSARY HYDRAULIC POWER PACK + VALVE STAND SHALL BE PROVIDED FOR ENTRY AND EXIT SIDE EQUIPMENT OF THE SLITTING LINE FOR PROPER AND SMOOTH OPERATION OF ALL THE HYDRAULIC CYLINDERS AND HYDRAULIC MOTORS CONSIDERED IN THE LINE. 16. DRIVE SYSTEM FOR STRIP SUPPORT ROLLS AT FURNACE: THERE IS ONE STRIP SUPPORT ROLLER AT THE ENTRY SIDE OF THE FURNACE. TO AVOID ANY SCRATCHES ON THE STRIP SURFACE DURING STRIP TRAVEL WE WILL PROVIDE DRIVE SYSTEM(1.5 HP AC MOTOR) TO THIS FURNACE ROLLER AND ITS SPEED IS SYNCHRONIZED WITH THE LINE SPEED. THE DRIVE IS THROUGH A REDUCTION GEARBOX, UNIVERSAL COUPLING AND SPROCKET AND CHAIN ARRANGEMENT. BRIEF DESCRIPTION OF THE SYSTEM: THESE ARE TECHNICAL SPECS FOR A CUSTOM ENGINEERED DRIVE SYSTEM TO POWER AND CONTROL, CONTROLLED ATMOSPHERE BRIGHT ANNEALING LINE. THIS CUSTOM ENGINEERED DRIVE SYSTEM WILL INCLUDE ASSEMBLIES OF MULTIPLE AC DRIVE CONTROLS FOR THE INDIVIDUAL SECTION OF THE BA LINE PLUS ASSOCIATED FURNACE CONTROL. THESE UNITS ARE MOUNTED IN A CONTINUOUS LINE-UP OF NEMA CABINETS WITH INTERCONNECTING CONTROL FOR THE OPERATION AS AN INTEGRATED SYSTEM. ADDITIONAL PROCESSORS AND ASSOCIATED HARDWARE AND SOFTWARE ARE INCLUDED WITH THE INDIVIDUAL DRIVE CONTROLS TO PROVIDE THE MASTER REFERENCE, LINE CONTROL SEQUENCING AND OTHER SPECIFIED FUNCTIONS OF THE FURNACE. THESE INCLUDE THE OPERATOR INTERFACE, DATA HANDLING, FAULT OR STATUS ANNUNCIATION, AND COMMUNICATION WITH OTHER SYSTEMS. IN ADDITION TO THE CONTROL EQUIPMENT, THIS CUSTOM ENGINEERED DRIVE SYSTEM INCLUDES SEPARATELY MOUNTED AC MOTORS AND DRIVE TRANSFORMERS AND MISCELLANEOUS TRANSDUCERS FOR MOUNTING ON THE BA LINE. AS A CUSTOM ENGINEERED DRIVE SYSTEM, IT INCLUDES ALL SYSTEMS ENGINEERING AND CUSTOM CONTROL ENGINEERING REQUIRED TO PRODUCE A WELL-COORDINATED DRIVE SYSTEM THAT MEETS THE REQUIREMENT OF THE APPLICATIONS. THE LINE CONSISTS OF FOLLOWING DRIVES (MOTORS) UNCOILER: 7.5 HP, 0-1800 RPM - AC MOTOR - AC DRIVE GS2-4010 ENTRY TENSION BRIDLE: 5 HP, 0-1800 RPM AC MOTOR - AC DRIVE GS2-4010 ENTRY FURNACE ROLL: 1.5, 0-1800 RPM AC MOTOR - AC DRIVE GS1-22P0 JETCOOL ROLL X 2: 1.5 HP, 0-1800 RPM AC MOTOR - AC DRIVE GS1-22P0 JETCOOL GASTIGHT FAN: 15 HP 0-1800 RPM AC MOTOR - AC DRIVE GS1-22P0 EXIT TENSION BRIDLE: 7.5 HP 0-1800 RPM AC MOTOR - AC DRIVE GS2-4010 RECOILER: 15 HP 0-1800 RPM AC MOTOR - AC DRIVE GS3-4015 ALL DRIVES ARE DRIVEN BY AC MOTORS. THE AC MOTORS ARE CONTROLLED BY 4-QUADRANT REVERSIBLE DIGITAL DC DRIVES. THE SPEED IS VARIED BY ARMATURE VOLTAGE CONTROL PROVIDED BY REVERSIBLE THYRISTORS. THE AC DRIVES HAVE FIELD THYRISTORS TO SUPPLY FIELD VOLTAGE. COMMUNICATING CHOKES ARE PROVIDED FOR BOTH FIELD AND ARMATURE CIRCUITS TO PROTECT THE THYRISTORS FROM CURRENT SURGES. SEMICONDUCTOR FUSES ARE PROVIDED FOR BOTH FIELD AND ARMATURE CIRCUITS TO PROTECT THE THYRISTORS FROM OVER LOAD AND SHORT CIRCUITS. THE CRITICAL REQUIREMENT OF THE SYSTEM IS TO MAINTAIN CONSTANT TENSION BETWEEN ENTRY AND EXIT BRIDLES. ANOTHER CRITICAL REQUIREMENT IS TO MAINTAIN CONSTANT TENSION BEFORE THE RECOILER IRRESPECTIVE OF DIAMETER BUILD UP. LOAD CELL # 1 IS INSTALLED BEFORE EXIT BRIDLE TO GIVE ACTUAL TENSION FEEDBACK BETWEEN THE TWO BRIDLES AND LOAD CELL # 2 IS INSTALLED BEFORE RECOILER TO GIVE A FEEDBACK OF RECOILER TENSION. THE LOAD CELLS WILL GIVE 4 - 20 MA PROPORTIONAL TO THE TENSION. TENSION BRIDLES: EXIT BRIDLE IS USED AS A MASTER DRIVE AND THE LINE SPEED REFERENCE WILL BE GENERATED FROM EXIT BRIDLE DRIVE AND THE OTHER DRIVES WILL FOLLOW THE INCREASE OR DECREASE OF EXIT BRIDLE SPEED. EXIT BRIDLE IS IN SPEED MODE AND THE ENTRY BRIDLE WILL BE IN TENSION MODE. THE DRIVE IS PROVIDED WITH ADDITIONAL TECHNOLOGY CONTROLLER TO ACHIEVE TENSION CONTROL. THE OPERATOR WILL SET THE TENSION. LOAD CELL # 1 MONITORS THE TENSION BETWEEN TWO BRIDLES AND GIVES FEEDBACK OF ACTUAL TENSION. IN CASE OF DEVIATION IN ACTUAL TENSION, ENTRY BRIDLE IS ADJUSTED BY THE FEEDBACK OF THE LOAD CELL # 1 TO INCREASE OR DECREASE THE TENSION ACCORDINGLY. FURNACE ROLLERS: ROLLS ARE PROVIDED INSIDE THE FURNACE TO SUPPORT THE STRIP. THE ROLLS ARE DRIVEN AT LINE SPEED TO AVOID SCRATCHES ON THE STRIP. ENTRY ROLLS ARE DRIVEN BY ONE MOTOR, MIDDLE ROLLER IS DRIVEN BY ONE MOTOR AND EXIT ROLLER IS DRIVEN BY ANOTHER MOTOR. EACH MOTOR IS CONTROLLED BY DIGITAL AC DRIVE. ALL DRIVES ARE IN SPEED MODE. RECOILER: RECOILER IS CONTROLLED BY A DIGITAL AC DRIVE WHICH RUNS IN TENSION MODE. THE DRIVE IS FITTED WITH ADDITIONAL TECHNOLOGY CONTROLLER TO ACHIEVE TENSION CONTROLLER. THE OPERATOR SETS TENSION REFERENCE AND THE TENSION FEEDBACK IS DERIVED FROM LOAD CELL # 2 MOUNTED BEFORE RECOILER. THE TENSION ON THE STRIP IS MAINTAINED CONSTANT BETWEEN EXIT BRIDLE ROLL AND RECOILER. 18. HYDROGEN-NITROGEN BLEND PANEL SYSTEM: IT IS DESIGNED TO SUPPLY EITHER 100% NITROGEN OR A BLEND OF HYDROGEN AND NITROGEN GASES AT CONTROLLED RATES AND BLEND RATIOS FOR USE AS A PROTECTIVE ATMOSPHERE IN BRIGHT ANNEALING OPERATION. THE ELECTRICAL PANEL CONTAINS A PROGRAMMABLE LOGIC CONTROLLER WHICH CONTROLS THE BLEND PANEL. A NUMBER OF SAFETY INTERLOCKS MONITOR THE SYSTEM; THESE INTERLOCKS ALLOW HYDROGEN FLOW ONLY WHEN SAFE OPERATING CONDITIONS EXISTS, AND CONTROL THE INITIATION AND DURATION OF THE NITROGEN PURGE. THE CONTROL ENCLOSURE CONTAINS THE ELECTRICAL EQUIPMENT NECESSARY FOR START-UP AND SHUTDOWN OF THE SYSTEM. THE PANEL INCLUDES THE PLC, FLOW INDICATORS, ROTA METERS, SELECTOR SWITCHES, PUSH BUTTONS, INDICATING LINES AND EMERGENCY STOP BUTTONS. **PRICE QUOTED AS IS WHERE IS SUBJECT TO PRIOR SALE** **ALL SPECIFICATIONS ARE SUBJECT TO VERIFICATION BY PURCHASER** |
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