1 Coil Feed Systems Bruce Grant Coe Press Equipment Corp.
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Transcript of 1 Coil Feed Systems Bruce Grant Coe Press Equipment Corp.
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Coil Feed SystemsCoil Feed Systems
Bruce GrantCoe Press Equipment Corp.
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AgendaAgenda
Coil Feed SystemsCoil Feed Systems Considerations For SelectionConsiderations For Selection UnwindingUnwinding StraighteningStraightening Slack LoopsSlack Loops FeedingFeeding Question And AnswerQuestion And Answer
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Coil Feed SystemsCoil Feed Systems
Selection Determines:Selection Determines: VersatilityVersatility ProductivityProductivity Floor SpaceFloor Space
Variety Of SolutionsVariety Of Solutions
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Considerations For SelectionConsiderations For Selection
Speed RequirementSpeed Requirement Floor SpaceFloor Space Purchase PricePurchase Price Energy and Energy and
Maintenance CostMaintenance Cost SafetySafety
Coil WeightCoil Weight Range of Materials Range of Materials Material Finish Material Finish Run Time Between Run Time Between
ReloadingReloading Loading/Threading Loading/Threading
Time Time
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System ComponentsSystem Components
UncoilerUncoilerStraightenerStraightenerSlack LoopSlack LoopFeedFeed
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Uncoiler TypesUncoiler Types
The 3 most common types of uncoilers.The 3 most common types of uncoilers.
Coil CradleCoil Cradle Centering ReelCentering ReelPallet ReelPallet Reel
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Coil Cradle: ConceptCoil Cradle: Concept
The Coil Is Supported On RollersThe Coil Is Supported On Rollers Medium to Heavy Gauge MaterialsMedium to Heavy Gauge Materials Materials Not Sensitive To MarkingMaterials Not Sensitive To Marking
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Coil Cradles - AdvantagesCoil Cradles - Advantages Coil Weight prevents clock-spring.Coil Weight prevents clock-spring. Unlimited weight capacity.Unlimited weight capacity. Payoff speed does not vary as coil Payoff speed does not vary as coil
diameter changes.diameter changes.
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Coil Cradles - DisadvantagesCoil Cradles - Disadvantages
Marking and distortion of thin or Marking and distortion of thin or cosmetically sensitive materials.cosmetically sensitive materials.
Not suitable for rewinding and re-Not suitable for rewinding and re-banding partially run coils.banding partially run coils.
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Coil Cradles - 2 Basic StylesCoil Cradles - 2 Basic Styles
Inline StyleInline Style Combination Combination StyleStyle
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Inline Style CradleInline Style Cradle Unwinds coil from Unwinds coil from
the bottom.the bottom. Payoff is away Payoff is away
from the press.from the press. Easier to thread.Easier to thread.
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Inline Style CradleInline Style CradleSpace SaverSpace Saver
Overhead loop Overhead loop uses vertical uses vertical space instead of space instead of floor spacefloor space
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Combination Style CradleCombination Style Cradle
Unwinds coil from top.Unwinds coil from top. Pays off through a powered Pays off through a powered
straightener into conventional loop.straightener into conventional loop.
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Unobstructed access for loading.Unobstructed access for loading. Allows use of a load ramp for fast coil Allows use of a load ramp for fast coil
change.change.
Combination Style CradleCombination Style Cradle
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ThreadingThreading More difficult to thread thick or high strengthMore difficult to thread thick or high strength
Floor SpaceFloor Space Requires more floor space due to its conventional loop Requires more floor space due to its conventional loop
configuration.configuration.
Combination Style CradleCombination Style Cradle
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Pallet Reels: ConceptPallet Reels: Concept
Coils are Coils are stacked on a stacked on a turntable and turntable and unwound laying unwound laying on their sideon their side
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Narrow materialNarrow material Thin materialThin material Low strength Low strength
materialmaterial Where marking is Where marking is
not a concernnot a concern
Pallet Reels: ApplicationsPallet Reels: Applications
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LoadingLoading Coils can be stackedCoils can be stacked No need to upend No need to upend
narrow coilsnarrow coils Space SaverSpace Saver
Loop is contained Loop is contained around and above around and above coil and does not use coil and does not use much floor space.much floor space.
Pallet Reels: AdvantagesPallet Reels: Advantages
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Limited material Limited material Width CapacityWidth Capacity
Strip must transition Strip must transition from vertical to from vertical to horizontalhorizontal
Payoff Rate Payoff Rate Changes With Coil Changes With Coil DiameterDiameter
Pallet Reels: DisadvantagesPallet Reels: Disadvantages
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Clock spring DangerClock spring Danger Limited to light gauge, Limited to light gauge,
low strength materialslow strength materials Threading aides for Threading aides for
thick or high strength thick or high strength material are not material are not normally availablenormally available
YOW!!YOW!!
Pallet Reels: DisadvantagesPallet Reels: Disadvantages
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Centering Reels: ConceptCentering Reels: Concept
Coil is held by its Coil is held by its inside diameterinside diameter
Most common Most common method of unwindingmethod of unwinding
Available in a variety Available in a variety of configurationsof configurations
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Centering Reels: ApplicationsCentering Reels: Applications
Can accommodate a wide Can accommodate a wide variety of materialsvariety of materials
No contact with outer No contact with outer wraps of material as wraps of material as unwoundunwound
Great for non-marking Great for non-marking applicationsapplications
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Options available to safely and effectively thread Options available to safely and effectively thread thick or high strength material.thick or high strength material.
Allows rewinding, banding and removal of partially Allows rewinding, banding and removal of partially run coils.run coils.
Clockspring Guard
Hold Down With Motorized Wheel
Peeler
Breaker
Centering ReelsCentering Reels
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Motorized units with loop Motorized units with loop control for payoff into control for payoff into slack loop.slack loop.
Used where straightening Used where straightening is not required or can be is not required or can be used with pull through used with pull through straighteners or straighteners or feeder/straightener units.feeder/straightener units.
Centering Reels: PoweredCentering Reels: Powered
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Known as “Pull Off Reels”Known as “Pull Off Reels” Pinch rolls or powered Pinch rolls or powered
straightener pulls material straightener pulls material off coil off coil
Requires a drag Requires a drag tensioning device tensioning device prevents coil overrunprevents coil overrun
Centering Reels: Non-PoweredCentering Reels: Non-Powered
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Fixed position.Fixed position. Coil must be Coil must be
centered on mandrel centered on mandrel when loaded.when loaded.
Centering Reels: StationaryCentering Reels: Stationary
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Reel runs on a trackReel runs on a track Allows realignment Allows realignment
after the coil has after the coil has been loaded and been loaded and threaded.threaded.
Can run multiple Can run multiple coilscoils
Centering Reels: TravelingCentering Reels: Traveling
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Great for quick coil Great for quick coil changeschanges
Great for running Great for running partial coilspartial coils
Requires more Requires more floor spacefloor space
Centering Reels: Double EndedCentering Reels: Double Ended
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Dual Cone/Double Stub ArborDual Cone/Double Stub Arbor Used for very Used for very
heavy or very wide heavy or very wide coils, with small coils, with small inside diameters.inside diameters.
Support at both Support at both ends prevents ends prevents mandrel mandrel deflection.deflection.
Can reposition coil Can reposition coil after threadingafter threading
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StraighteningStraightening
PurposePurposeTo remove unwanted material shape To remove unwanted material shape
defectsdefects
RequirementsRequirementsVary per application depending on the Vary per application depending on the
material defects present, the design of material defects present, the design of the die and the finished part the die and the finished part requirements.requirements.
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Bend the material around sets of rollers to Bend the material around sets of rollers to alternately stretch and compress the upper alternately stretch and compress the upper and lower regions to and lower regions to exceed the yield pointexceed the yield point so that all surfaces are the same length so that all surfaces are the same length after spring back.after spring back.
Straightening: ConceptStraightening: Concept
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StrainStrain Elastic ModulusElastic Modulus StressStress Elastic LimitElastic Limit Yield PointYield Point SpringbackSpringback
Straightening: ConceptStraightening: Concept
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The result of winding strip into a coilThe result of winding strip into a coil Length difference between top and Length difference between top and
bottom surfacesbottom surfaces Results in curved shapeResults in curved shape
Straightening: Coil SetStraightening: Coil Set
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Effectiveness is a function of roll center Effectiveness is a function of roll center distance, number of rolls and power distance, number of rolls and power availableavailable
StraighteningStraightening
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Precision LevelerPrecision Leveler StraightenerStraightener
Straightening: MethodsStraightening: Methods
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Precision LevelerPrecision LevelerMaterial Conditions CorrectedMaterial Conditions Corrected
Coil SetCoil SetEdge WaveEdge WaveCenter BucklesCenter BucklesCrossbowCrossbowCoil BreaksCoil BreaksDeep Stress ReliefDeep Stress Relief
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19 to 21 work rolls 19 to 21 work rolls Small diameter Small diameter
rollsrolls Very close roll Very close roll
center distancecenter distance Adjustable flights Adjustable flights
of backup rollsof backup rolls
Precision LevelerPrecision Leveler
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Removes coil set and Removes coil set and minor crossbow onlyminor crossbow only
Typically 5 to 11 work Typically 5 to 11 work rollsrolls
Larger roll diameterLarger roll diameter Wider roll spacingWider roll spacing Backup rolls not Backup rolls not
adjustableadjustable
Straightener/FlattenerStraightener/Flattener
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Available in various roll configurationsAvailable in various roll configurations5, 7, 9 and 11 roll versions5, 7, 9 and 11 roll versionsAdditional roll sets allow running entire Additional roll sets allow running entire coil without readjustment of straightening coil without readjustment of straightening rollsrolls
Straightener/FlattenerStraightener/Flattener
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Pull Through StraightenersPull Through Straighteners Non-driven rollersNon-driven rollers Located after the loop Located after the loop Material is pulled through the straightener by Material is pulled through the straightener by
the feederthe feeder
Powered StraightenersPowered Straighteners Driven rollersDriven rollers Located before the loopLocated before the loop Often used to pull material off of the coilOften used to pull material off of the coil
Straightener/FlattenerStraightener/Flattener
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Inexpensive and compactInexpensive and compactAllows shorter loop lengthAllows shorter loop length
Straightener: Pull ThroughStraightener: Pull Through
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Pull Through Straightener DisadvantagesPull Through Straightener Disadvantages Material markingMaterial marking Slippage and inaccurate feed lengths Slippage and inaccurate feed lengths Requires power from the feeder for Requires power from the feeder for
straightening. straightening. Limits material capacityLimits material capacity Decreases feed speedsDecreases feed speeds Less effective pilot releaseLess effective pilot release
Straightener: Pull ThroughStraightener: Pull Through
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Straightener: PoweredStraightener: Powered
Advantages:Advantages:Less markingLess markingHigher production speeds Higher production speeds Greater material capacityGreater material capacityStraightener/FeedersStraightener/Feeders
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Slack Loop: PurposeSlack Loop: Purpose Material storageMaterial storage to supply the feed while the to supply the feed while the
unwinder accelerates to line speedunwinder accelerates to line speed To absorb and store material while the coil To absorb and store material while the coil
decelerates after feeding stopsdecelerates after feeding stops To allow the coil to run at a constant speedTo allow the coil to run at a constant speed
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Slack LoopSlack Loop
TypesTypes HorizontalHorizontal OverheadOverhead PaddlePaddle
Horizontal Loop
Paddle Loop
Overhead Loop
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The amount of material stored is equal to The amount of material stored is equal to the total slack length minus the straight the total slack length minus the straight line length. line length.
Straight Line Length
Slack Length
Slack LoopSlack Loop
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If the material is straightened prior to the loop If the material is straightened prior to the loop then the radius of the loop cannot be smaller then the radius of the loop cannot be smaller than the than the Minimum Bend Radius Minimum Bend Radius for the thickest for the thickest material that will be run on that line.material that will be run on that line.
Slack LoopSlack Loop
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The strip must be supported into and out of the The strip must be supported into and out of the loop by cascade rolls at both ends.loop by cascade rolls at both ends.
Without support the weight of the loop will cause Without support the weight of the loop will cause the material to be bent beyond its minimum bend the material to be bent beyond its minimum bend radius resulting in material that is no longer flat.radius resulting in material that is no longer flat.
Slack LoopSlack Loop
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Gripper FeedsGripper Feeds Roll FeedsRoll Feeds
Press Driven Press Driven Servo DrivenServo Driven Straightener/FeederStraightener/Feeder
Feeds: TypesFeeds: Types
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Uses linear motion to move the stripUses linear motion to move the stripUses clamping mechanisms to hold Uses clamping mechanisms to hold
and move the stripand move the strip
Feeds: GripperFeeds: Gripper
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Powered by: Powered by: Compressed airCompressed air HydraulicHydraulic Servo Drive and Servo Drive and
Ball ScrewBall Screw
Feeds: GripperFeeds: Gripper Applications:Applications:
Slow To Medium Slow To Medium SpeedsSpeeds
Medium to Heavy Medium to Heavy gauge materialsgauge materials
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Advantages: Advantages: Low acquisition priceLow acquisition price Mechanically and electrically simpleMechanically and electrically simple Accurate if properly maintained and set upAccurate if properly maintained and set up Widely used with pull through straightenersWidely used with pull through straighteners Flexible feed and pilot release timingFlexible feed and pilot release timing
Feeds: GripperFeeds: Gripper
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Disadvantages:Disadvantages:High maintenance costHigh maintenance costLimited speedsLimited speedsLong set-up timeLong set-up timeHigh operating costHigh operating costMaterial markingMaterial markingLimited feed length capabilityLimited feed length capabilityNo inherent inching capabilityNo inherent inching capability
Feeds: GripperFeeds: Gripper
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Roll FeedsRoll Feeds
Press DrivenPress DrivenServo DrivenServo DrivenStraightener/FeedersStraightener/Feeders
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Rack and Pinion Rack and Pinion FeedsFeeds
Cam FeedsCam FeedsPowered by the Powered by the
presspressSynchronized to Synchronized to
press motionpress motion
Roll Feeds: Press DrivenRoll Feeds: Press Driven
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Applications:Applications:Full range of Full range of
materialsmaterialsHigh speed High speed
applications applications Non-marking Non-marking
capabilitycapability
Roll Feeds: Press DrivenRoll Feeds: Press Driven
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AdvantagesAdvantagesHigh cycle ratesHigh cycle ratesSynchronized to Synchronized to
press motionpress motionVery accurateVery accurateMechanically and Mechanically and
electrically simpleelectrically simple
Roll Feeds: Press DrivenRoll Feeds: Press Driven
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DisadvantagesDisadvantagesMechanical linkage to pressMechanical linkage to pressLimited feed length capabilityLimited feed length capabilityLimited adjustment of feed Limited adjustment of feed
timingtimingNo inherent inching No inherent inching
capabilitycapability
Roll Feeds: Press DrivenRoll Feeds: Press Driven
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Powered By A Closed Loop Servo DrivePowered By A Closed Loop Servo Drive Microprocessor Based Motion ControlMicroprocessor Based Motion Control
Roll Feeds: Servo DrivenRoll Feeds: Servo Driven
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Roll Feeds: Servo DrivenRoll Feeds: Servo Driven
Applications:Applications:Full range of materialsFull range of materialsNon-marking capabilityNon-marking capabilityMedium high speed Medium high speed
applicationsapplications
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Rapid set upRapid set upUnlimited length capabilityUnlimited length capabilityFlexible feed timing and windowFlexible feed timing and windowInherent Inching CapabilityInherent Inching CapabilityLow maintenanceLow maintenanceInterface with press automationInterface with press automation
Roll Feeds: Servo DrivenRoll Feeds: Servo Driven
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Wide variety of configurations Wide variety of configurations and control options:and control options:Synchronization to press motionSynchronization to press motionStep programmability Step programmability Push-Pull FeedsPush-Pull FeedsZig-Zag FeedsZig-Zag FeedsStraightener/FeedersStraightener/Feeders
Roll Feeds: Servo DrivenRoll Feeds: Servo Driven
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Roll Feeds: Servo DrivenRoll Feeds: Servo Driven
Straightener FeedersStraightener Feeders Compact Coil LinesCompact Coil Lines
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ConclusionConclusion
There is no “one size fits all” solution.There is no “one size fits all” solution.Don’t limit your capabilities through Don’t limit your capabilities through
equipment selection.equipment selection.Consider all aspects when selecting Consider all aspects when selecting
your system.your system.
Summary & Conclusion