NAKAMURA-TOME - Methods Machine Tools

WT-250IINAKAMURA-TOMEPRECISION INDUSTRY CO.,LTD.

Turret-Type Multi-Tasking Turning CenterE v o l u t i o n a r y A d v a n c eHigh ProductivityMultitasking MachineFrom diversified small-lot production to mass production1

High Rigidity Box-Type Slide-Ways on all AxesEquipped with all box-type slide-ways, which are traditionally hand scraped by highly skilled technicians, according tostringent quality control standards. Having high rigidity slides, the high-output motors ensure powerful cutting.WT250II is the ultimate two-spindle Multitasking Turning Center, made with high-level skills and interactive technology.2

Major Improvements for Diversified Variable-Lot-Size ProductionMake Versatile Machining andIncrease ProductivityWide box-type slide-ways on X, Z and Y- axes45 degrees slant bed structure with high rigidity torque tube and smooth chip disposalDodecagonal / 24-station upper and lower turretsDia. 210mm (8inch) chucks for left and right hand side spindles3

Max. Machining Length 555mm! Easy Handling ofShorter Idle Time, Higher Productivity.Part JOINTCategory AircraftCycle time 8min 15sec.Material SUS303Raw partdimensionD65mm Bar stock(FINISHED 80mm)AerospaceO.D. Rough Indexable drill Thread mill Key way Small drillingtype : DWLNR2525M08diameter : 65-45mmrpm : 1132min -1 - 784min -1feed : 0.3mm/revsurface speed : 160m/minmachining Time : 75sec. type : TAFS3700F40Mitsubishidiameter : 37mmrpm : 1300min -1feed : 0.12mm/revsurface speed : 150m/mindepth : 24mmmachining Time : 13sec.type : WX-PNC 16X42 P1.5-INTdiameter : 16mmrpm : 800min -1feed : 0.06mm/revsurface : 40m/minmachining Time : 55sec.Wedge : 6mmdepth : 3mmlength : 32.5mmtype : N50-6814diameter : 39mmrpm : 0feed : 30m/minsurface speed : 3m/minmachining Time : 84sec.type : EX-GDN0.5diameter : 0.5mmrpm : 6000min -1feed : 0.015mm/revsurface speed : 9.4m/mindeep : 3.5mmmachining Time : 25sec.5

Long Shafts.AerospaceMedicalAutomotiveConstructionGeneralEnergy Communicaton Transportation Electric HousingapparatusComplete ControlA wide variety of parts can be machined from bar, shafts, forgings orcastings. The highest productivity can be achieved with the newesttechnology in multitasking, all in a compact floor space.Upper-L, Lower-R Turning operationUpper-L, Lower-R boring operationLeft SimultaneousUpper Lower Milling operationUpper-R, Lower-L machiningTransferRight SimultaneousUpper Lower Milling operationMAX machining length555mmMAX machining diameter250mmSpindle nose distanceMax.885mm / Min.265mm6

High-Rigidity TurretDouble Performance!S×2Twin-Spindle 7

Combining Turning and Milling Capabilities.Double Performance!M×2Double Milling Motor 8

Peripheral Devices for AutomationA New Era of Peripheral Devices thatBar FeederAuto Cho-bei / Cho-beiAuto cho-bei is a bar feeder forautomatic bar loading.Cho-bei is a bar feeder for manual bar loading.Auto Cho-bei IINHF-CB-51(S.M.L)−(3M,4M)NotesMax. workpiece diameter [mm] 10 - 30 34 - 42 46 - 51 Hexagonal bar H8-H36Max. rotation Bar material 6,000 5,000 4,000 −speed [min-1] Hexagonal material 3,000 −Bar bending [mm/m] less than 0.5 MAS level BBar length [mm] 3,000 / 4,000 Min. 1,500mmBar stock capacity [mm×pcs] dia.30mmx10pcs Stocker length 300mmFeeding speed [mm/sec] Max.400mm/sec adjustableFeeding power [kg] Max.40kg adjustableMachine Length 3M/4M [mm] S:3,790/4,795 M:3,870/4,875 L:4,165/5,170 −dimension Width [mm] 733 −Shaft LoaderZen-beiBy using a shaft loader andshaft unloader, full automationof shaft work can be achieved.Shaft UnloaderHai-beiBy using an auto bar feeder andshaft loader, full automation ofshaft work can be achieved.Gantry Loader3KgGR-203Nakamura-Tome offers built-in type Gantryloaders for both twin spindle machinesand for single spindle machines. Standardtype gantry comes with a stocker outleton the machine left hand side; however,right hand side outlet and passage typeoutlet are both available. In addition to flattype and multi-layer type stockers, multilayerpalletizing stocker “Hako-bei” isalso available, which is suitable for smallsizedworkpieces. Jump programmingfunction helps start automatic operationfrom different patterns, depending on themachining status and chucking statusof the parts. This simplifies restartingautomatic operation, especially afterirregular machine stops. By confirmingthe machining status of the part, thecontrol automatically jumps to the relevantprogram block and starts the program.WT-250 + GR203* Patrol light is optionally available.9

Contribute to Labor Saving.Factory Automation Devices originally designedand developed by Nakamura-TomeCutting Chips Disposal SystemChip conveyorChip conveyor is essential for full automation. Nakamura-Tome's multi-tasking machines with theirhigh capabilities for chip-removal ought to be taken into consideration. When using oil-through typetools, a filter shall be considered to remove fine cutting chips from coolant. When using water-solublecoolant, a coolant level float switch is necessary. When using oil-base coolant, auto extinguisher,fireproof dumper, and oil mist collector are indispensable. Outlet directionRight-side outlet Back-side outlet Right-back side outlet[SC-200] [WT-100] [WT-150]Back-side outlet chip conveyoris not available on the followingmodels : STW-40, Super-NTX,Super-NTJX, Super-NTJ,Super-NTM 3* This is a custom-made chip conveyorWhen a back-side-outlet chipconveyor is not available,this type of chip conveyorshall be chosen, especiallywhen a shaft unloader orright hand side gantry withworkstoker are equipped. Conveyor typeDrum filter type conveyor / recommendedIt prevents coolant related troubles,such as coolant overflow by cloggedfilters or coolant malfunction. Alarge-sized drum filter in the coolanttank cleans the coolant. With arotating drum filter, the specialpump washes out coolant frominside outwards, preventing cuttingchips from accumulating on thefilter outer diameter.Coolant separatorCoolant separator is necessaryto keep coolant performance. Byseparating collected lubricationoil from coolant, this minimizesbad odors, prevents coolant fromrotting, and prolongs its life.Coolant float level switchHinge type conveyorSteelAluminumBrassgunmetalIt is suitable for fi ne chips, long andcurled chips, short chips and wavychips produced during cut-off, butnot for powdery chips produced frommachining cast iron, …etcScraper type chip conveyorCastingAluminumBrassgunmetalNot suitable for long cutting chips,because they get caught inside therail, causing malfunctioning. In caseof machining casting iron, filtering isimproved by attaching a magnet tothe bottom of the conveyor.* In the photo is a custom-made coolant float level switchCoolant filterIn case of using tools with tiny oilthroughholes, the filtering canbe insufficient depending on thehole size. If the required filteringaccuracy is more than 20-40micrometers, it is recommended touse a maintenance-free type fi lterinstead. Please contact our localdistributors for details.10

Less Fixtures! Less Set-up! Less Skills!Necessary functions for multi-tasking are offered as standard features."NT-Nurse II", "NT Work Navigator" and "Overloaddetection/ Airbag" were developed to facilitateprogramming and set-up, to reduce fixture costs ofcomplex parts, and to reduce machine-cell stops.Nakamura-Tome safety TechnologyNT Work NavigatorACTIVE SAFETY Avoid a crash before it happens!Material recognition function (G310/G312) can be used not only to avoidcollisions, but also to optimize theface turning process for forgings thathave different lengths. In addition, itis also useful for part-loading statusconfirmation, machining datum shift, anddistinguishing different parts. Fixtures no longer necessaryBefore machining a complex or irregularpart, the coordinate recognition of rawpart geometry is necessary. It can beprovided with less cost, less labor andmore ease. A round bar mounted onturret head as a measurement toolcontacts with the part and then triggersthe coordinate values to be recordedin the CNC control. This is versatilesoftware developed using torque controltechnology of servomotor. Consequentlythe high complex fixtures for chucks andstocker pallets are eliminated, the costof positioning parts can be dramaticallyreduced.Overload detection*PASSIVE SAFETY A security feature to rely onwhen the worse happens.When unavoidable human error resultsin a collision, the servo drive detectsoverload and drastically reduces theimpact on the machine by reversing theslide movement direction within less than8 milliseconds.In addition to minimizing damage of thefirst impact*, fears that the tool will moveto the next program block and cause asecond impact, are reduced to zero. Thisstandard feature is available on the X, Z,Y, C and B-Axes.Without Overload DetectionNT Nurse All-in-one Software package!NT-Nurse is software that provides theoperator with user-friendly environment foroperation, programming, and productionon the machine. Among vital featuresare coordinate recognition (a must formulti-tasking), direct chucking to preventpositioning error during transfer, and perfectsynchronization of the left and right handspindles. Other features include the loadmonitor for detecting tool breakage andtool wear, tool life management, operationcondition monitoring, in addition to manyother features to simply programming, setup, operation, and production, all offered inone single package.This feature does not mean zero impact.With Overload Detection11

The latest multitasking turning center WT-250IIOperator Full Support through EasyOperation and ReliabilityThe NT nurseLuck-bei IINT Manual Guide iIndex OverrideTurret speed can be adjusted with the feed overriderotary switch from 0 to 100% during indexing inautomatic or manual mode. This can be usedduring fully automatic operation to reduce turretspeed or even bring it to a halt when necessary.Jump Programming (G411)For machines equipped with a gantry loaderor a bar feeder, restarting operation after aninterruption, is significantly improved. Even ifthe operator has to stop and reset the machinein the middle of automatic cycle, there is noneed to remove all the parts from the chucks organtry hands to restart operation. The part statusdisplayed on the NT Nurse screen, is used torestart the program, which depending on partmachining condition (raw, half-finished or finishedpart), jumps to the appropriate program blockand re-starts from there. Thanks to this feature,programming of machines with a gantry loader hasbecome drastically simplified, eliminating the needto divide each machining program into several subprograms.DNC operation from memorycard, which can be mountedinternally or externally.Arbitrary Axis Torque Limit (G359)During cut off and part transfer from left to right,closing the right hand side chuck may causeoverload on the right hand spindle servo axis(B2-Axis), resulting in a servo alarm. By controllingthe B2-Axis motor torque in a range between 20and 100%, this feature prevents the servo motorthrust force from exceeding a certain value, byslightly moving the B2-axis when it is subjected toa certain load, thus preventing cut-off tool insertbreakage and overload servo alarms.Deep Hole Rigid Tapping CycleStep feed rigid tapping cycle is useful for difficultto-machinematerials and deep holes. Regardingthe tapping tool retract amount, it is possible tochoose between two patterns.Various features are standard Part program storage length 640m(upper 320/ lower 320) Up to 500 registered programs(upper 250/ lower 250) Tool offset pairs 99 Pairs 10.4 inch color LCD Display Direct drawing dimension input programming Fixed cycles (G90, G92, G94) Multiple repetitive cycles type I Multiple repetitive cycles type II Canned cycles for drilling Synchronized mixture control Custom macro Additional custom macro common systemvariables DNC operation from memory card(not including memory card) Rigid tapping for spindle and driven tools Spindle synchronization NT Work Navigator NT Nurse Z-Axis Overload Detection (Airbag)standardoptionPart programstorage length320m + 320mPart programstorage length 640m + 640mPart programstorage length1280m + 1280mPart programstorage length 2560m + 2560m 5120m + 5120m 10240m + 10240mNumber of registrableprograms 250 + 250Number of registrableprograms 500 + 500Number of registrableprograms500 + 500 or 1000 + 1000Select either oneNumber of registrableprograms500 + 500 or 2000 + 2000Select either oneNumber of tooloffset pairs99pairs + 99pairs12

The latest multitasking turning center WT-250IIThe NT nurseThe NT Nurse with its user-friendly features.A machine management feature that contributes to drastic reduction of set-up time !!NT-Nurse provides a user-friendly environment to achieve the best production results. Among NT Nurse features are the Load monitor for monitoring toolbreakage and tool wear, the Soft Work Pusher for accurate parts transfer, as well as several other features to prevent errors and facilitate production.Menu Display Operation Condition Display Alarm DisplayTool Life (spare tool call-up) Tool Counter Alarm History DisplayOffset History Load Monitor Power-Saving SettingQuick Offset Input General Pata Input / Output Function Work-Piece StatusDisplay for machineswith Gantry loaderThese items are only part of 24 features.13

The latest multitasking turning center WT-250IILuck bei II NT Manual Guide iLuck-bei IINT Manual Guide iA programming system with the ability of generating NC programs (ISO/EIA G-code programs) easily. Among its features are: Machiningcycle creation (conversational function) for easy programming, NC Programming Support, which enables once-programmed machiningprocesses to be cut, copied, pasted and moved, as well as NC program simulation using tool path or solid models. Process EditingA function that automatically recognizes and extracts the name and order of all machiningprocesses, then displays them in table layout. Machining processes can moved, copied orswapped easily. In addition, waiting M-codes can be added with the click of a button. Fixed Form FunctionAbundant fixed forms with over 600 patterns (10 times more than before) are standard.Easy selection of fixed forms from a menu.Additional custom made programs can be registered.Separate display based on Spindleand turret.Displayed in a clear layout accordingto waiting functionsProgram DisplayWaiting function input with the push of a button Machining Cycle (conversational) FunctionComplex machining accomplished with minimum inputBest guidance for Nakamura-Tome multitasking machineSmooth input without confusionIn addition to Nakamura-Tome's original work navigator, which is essential for multi-tasking, programming of soft quill pusher and other features can be performed easily. Work navigator programming screen Soft work pusher programming screen Soft quill pusher programming screen14

E V O L U T I O NFloor Space & Spindle Swing and Tool Swing Floor space (Standard)Tool interference Spindle Swing and Tool Swing (L 65, R 51, 24ST)(unit : mm)(unit : mm)15

Slide travel range Slide travel range (L 65, R 51, 24ST)(L 65, R 51, 24ST) unitunitmminchmminchE V O L U T I O N16

E V O L U T I O NTooling System 17

Machine Specifications *1 Some tool holders have a max.3,600min -1 .*2 When with chip conveyor.*3 Depends on equipped options and peripherals. Control Specifications Safety devices such as various interlock, fences for robotics, auto loading device, work stocker, automatic fire extinguisher etc. are available asoptions which can be included in your purchase package. Please contact our local distributor and dealer for your specific requirements. Precautions about the use of cutting coolantSynthetic Coolants are Damaging to Machine ComponentsConcerning the use of cutting fluids, cautions have to be taken on the type of coolant being used.Among coolants available in the market, some types are damaging to machine components and should be avoided. Typical damages are turcite wear,peeling of paint, cracking and damage to plastics and polymers, expansion of rubber parts, corrosion and rust build up on aluminum and copper.To prevent such damages, coolants that are synthetic, or containing chlorine have to be avoided.Machine warranty terms do not apply to any claims or damage arising from the use of improper coolant.E V O L U T I O N18

65 Union Ave., Sudbury, MA 01776NAKAMURA-TOME PRECISION INDUSTRY CO., LTD.http://www.nakamura-tome.co.jpNetsuno 15, Hakusan city, Ishikawa, 920-2195 JapanPhone : +81 76 273 8100 Fax : +81 76 273 4312E-mail : nt-jpn@nakamura-tome.co.jp Specifications, illustrations and data given herein are subject to change without notice. The products in this catalog are controlled based on Japan's "Foreign Exchange and Foreign TradeLaw". The export of the products are subject to an export license by the Japanese government.Cat.No.0100E01010810N