Related Manuals for SCHUNK ROTA TB2 470-185
Summary of Contents for SCHUNK ROTA TB2 470-185
- Page 1 Pneumatic power chuck ROTA TB2 / ROTA TB2 LH Assembly and Operating Manual Translation of original operating manual...
- Page 2 Imprint Imprint Copyright: This manual is protected by copyright. The author is SCHUNK SE & Co. KG. All rights reserved. Technical changes: We reserve the right to make alterations for the purpose of technical improvement. Document number: 0889132 Version: 08.00 | 05/04/2024 | en...
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Page 3: Table Of Contents
Table of contents Table of Contents 1 General ..................... 5 About this manual................1.1.1 Illustration of warnings ............... 1.1.2 Applicable documents ..............1.2 Warranty ................... 1.3 Sizes....................1.4 Scope of delivery................. 2 Basic safety notes................. 2.1 Appropriate use .................. 2.2 Inappropriate use ................2.3 Structural changes................ - Page 4 Table of contents 4 Assembly.................... 28 4.1 Torques per screw ................28 4.2 Pre-assembly measures................ 28 4.3 Distributor ring ................... 29 4.3.1 Mounting with bracket ..............30 4.3.2 Mounting with 2-part clamping ring (D.R.M.B.) ........ 32 4.4 Attachment of the ROTA TB2 chuck............33 4.5 Optional mechanical pressure monitor with inductive proximity switch ..
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Page 5: General
General 1 General 1.1 About this manual This manual contains important information for the safe, correct use of the product. It is an integral part of the product and must be kept accessible for personnel at all times. Personnel must have read and understood this manual before beginning any work. -
Page 6: Applicable Documents
* One cycle comprises one complete clamping procedure ("opening" and "closing") 1.3 Sizes This operating manual applies to the following sizes: ROTA TB2 470-185 / 470-185 LH ROTA TB2 520-191 / 520-191 LH ROTA TB2 600-275 / 600-275 LH ROTA TB2 630-275 LH... -
Page 7: Basic Safety Notes
Basic safety notes 2 Basic safety notes Improper handling, assembly and maintenance of this product may result in risk to persons and equipment if this operating manual is not observed. 2.1 Appropriate use The product is used for clamping metal and plastic workpieces on machine tools. -
Page 8: Structural Changes
Renolit HLT2 are incorporated into the product as auxiliary and operating materials. The safety data sheet for LINOMAX plus can be found at www.schunk.com. 08.00 | ROTA TB2 / ROTA TB2 LH | Pneumatic power chuck | en | 0889132... -
Page 9: Chuck Jaws
After a collision, the clamping device and the chuck jaws must be subjected to a crack detection test before being used again. Replace damaged parts with original SCHUNK spare parts. The chuck jaw mounting screws and if present, the T-nuts, must be replaced if there are signs of wear or damage. -
Page 10: Personal Protective Equipment
Basic safety notes Instructed person Instructed persons have been instructed by the operator regarding the tasks entrusted to them and the potential dangers of inappropriate behavior. Manufacturer's service The manufacturer's service personnel have the specialized personnel training, knowledge, and experience to perform the work entrusted to them and to recognize and avoid potential dangers. -
Page 11: Notes On Safe Operation
Basic safety notes 2.13 Notes on safe operation Incorrect manner of working by personnel An incorrect manner of working can make the product unsafe and risks serious injuries and considerable material damage. Observe the safety notes and assembly instructions. Do not expose the product to any corrosive media. Products for special ambient conditions are excluded. - Page 12 (clamping force, coefficient of friction, wear behavior). (For product information about LINOMAX plus, see the "Accessories" chapter of the SCHUNK lathe chuck catalog or contact SCHUNK.) 08.00 | ROTA TB2 / ROTA TB2 LH | Pneumatic power chuck | en | 0889132...
- Page 13 Depending on the operating conditions, the function and clamping force must be checked after a certain period of operation . For this purpose, a calibrated clamping force meter (e.g. SCHUNK IFT) must be used. The loading conditions are shown below for the different chuck variants. 2-jaw...
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Page 14: Malfunctions
Basic safety notes The clamping force should always be measured with the clamping device in the same condition as it is used in for the current clamping application. If top jaws with clamping steps are used, measuring must be performed in the same step as for the respective clamping task. -
Page 15: Protection Against Dangerous Movements
Basic safety notes 2.17 Protection against dangerous movements Unexpected movements If the system still retains residual energy, serious injuries can be caused while working on the product. Switch off the energy supply, ensure that no residual energy remains and secure against inadvertent reactivation. Never rely merely on the response of the monitoring function to avert danger. - Page 16 Basic safety notes DANGER Possible risk of death for operating personnel if a jaw breaks or if the clamping device fails because the technical data has been exceeded and a workpiece is released or parts fly off! Never exceed the technical data specified by the manufacturer for using the clamping device.
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Page 17: 2-Jaw Chuck
Basic safety notes CAUTION There is a risk of limbs being crushed by moving parts during manual loading and unloading and the clamping procedure. Do not reach between the chuck jaws. Use loading devices. CAUTION Allergic reactions or irritation due to skin or eye contact with lubricants on the product. -
Page 18: Technical Data
Technical data 3 Technical data 3.1 Chuck data min. operating pressure [bar] max. operating pressure [bar] Jaw serration 3/32“ x 90° ROTA TB2 Size 1000 Chuck body outer diameter [mm] 1000 Distributor ring inner diameter [mm] Distributor ring outer diameter [mm] Total clamping force at 6 bar [kN] Toolholder through-hole [mm] Overall stroke per jaw [mm]... -
Page 19: Clamping Force / Speed Diagrams
The chuck is in perfect condition and lubricated with SCHUNK LINOMAX plus special grease. If one or more of these prerequisites is altered, the diagrams will no longer be valid. - Page 20 Technical data Clamping force/RPM diagram for ROTA TB2 600-275 minimum required clamping force 33% speed of rotation Clamping force/RPM diagram for ROTA TB2 685-325 minimum required clamping force 33% speed of rotation Clamping force/RPM diagram for ROTA TB2 850-375 minimum required clamping force 33% speed of rotation 08.00 | ROTA TB2 / ROTA TB2 LH | Pneumatic power chuck | en | 0889132...
- Page 21 Technical data Clamping force/RPM diagram for ROTA TB2 1000-560 minimum required clamping force 33% speed of rotation Clamping force/RPM diagram for ROTA TB2 470-185 LH minimum required clamping force 33% speed of rotation Clamping force/RPM diagram for ROTA TB2 520-191 LH...
- Page 22 Technical data Clamping force/RPM diagram for ROTA TB2 600-275 LH minimum required clamping force 33% speed of rotation Clamping force/RPM diagram for ROTA TB2 630-275 LH minimum required clamping force 33% speed of rotation Clamping force/RPM diagram for ROTA TB2 685-325 LH SP-HB 630 19,9 kg 281,5mm...
- Page 23 Technical data Clamping force/RPM diagram for ROTA TB2 740-375 LH SP-HB 630 19,9 kg 306,5mm SP-WB 630 36,6 kg 256,5mm erforderliche Minimum required Mindest- clamping force 33% spannkraft 33% n [min Speed of Rotation Drehzahl Clamping force/RPM diagram for ROTA TB2 850-375 LH minimum required clamping force 33% speed of rotation...
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Page 24: Calculations For Clamping Force And Speed
Technical data 3.3 Calculations for clamping force and speed Missing information or specifications can be requested from the manufacturer. Legend Total centrifugal force [N] Centrifugal torque of top jaws [Kgm] Effective clamping force [N] Centrifugal torque of base jaws [Kgm] minimum required clamping force [N] n Speed of rotation [RPM] spmin... - Page 25 Technical data The required effective clamping force for machining F calculated from the product of the machining force F and the safety factor S . This factor takes into account uncertainties in the calculation of the machining force. According to VDI 3106: S ≥...
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Page 26: Calculation Example: Required Initial Clamping Force For A Given Speed
Technical data 3.3.2 Calculation example: required initial clamping force for a given speed Required initial clamping force F for a given RPM n The following data is known for the machining job: Gripping from the outside in (application-specific) Machining force F = 3000 N (application-specific) max. -
Page 27: Calculation Of The Permissible Speed In Case Of A Given Initial Clamping Force
Technical data 3.3.3 Calculation of the permissible speed in case of a given initial clamping force Calculation of the permissible RPM n in case of a given initial perm clamping force F The following formula can be used to calculate the permissible RPM for a given initial clamping force during shutdown: CAUTION For safety reasons, the calculated permissible RPM may not... -
Page 28: Assembly
Assembly 4 Assembly 4.1 Torques per screw Tightening torques for mounting screws used to clamp the chuck on lathes or other suitable technical equipment (screw quality 10.9) Screw size M6 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27 M30 Admissible torque M 290 400 500 1050 1500 (Nm) -
Page 29: Distributor Ring
Assembly 4.3 Distributor ring The distributor ring is a completely separate component from the chuck and is centered and held stationary on the spindle head of the lathe axially and radially with a spacer bracket. After the first set-up of the chuck on the spindle nose of the lathe, the height of the spacer bracket is defined. -
Page 30: Mounting With Bracket
Assembly 4.3.1 Mounting with bracket The console height dimension is calculated by adding together the distances between the face side of the headstock and that of the distributor ring. If the headstock face surface is machined, the calculated dimension can be taken as the height dimension for the spacing console. - Page 31 Assembly True running check Headstock mounting surface Distributor ring mounting surface Height dimension Dimensions of the console ROTA TB2 / TB2 LH 1000 Ø A [mm] Ø B* [mm] Ø C [mm] Ø D [mm] * Example only (deviations possible) 08.00 | ROTA TB2 / ROTA TB2 LH | Pneumatic power chuck | en | 0889132...
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Page 32: Mounting With 2-Part Clamping Ring (D.r.m.b.)
Assembly 4.3.2 Mounting with 2-part clamping ring (D.R.M.B.) The distributor ring may be clamped onto a rigid collar on the machine (at least 8 mm wide) by means of a DRMB. Here, the distributor ring is clamped onto this collar radially using two screws. -
Page 33: Attachment Of The Rota Tb2 Chuck
Assembly 4.4 Attachment of the ROTA TB2 chuck Chuck assembly Maximum attainable radial and axial run-out tolerances related to the chuck Chuck size Max. radial run-out Max. axial run-out [mm] tolerance [mm] tolerance [mm] 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.03 0.06... - Page 34 } 4.1 [/ 28]. Check radial and axial run-out again. SCHUNK provides standard flanges that can be used to mount the ROTA TB2 chuck on spindles in accordance with DIN 702-1, DIN 702-3 and DIN 702-2. 08.00 | ROTA TB2 / ROTA TB2 LH | Pneumatic power chuck | en | 0889132...
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Page 35: Optional Mechanical Pressure Monitor With Inductive Proximity Switch
4.5 Optional mechanical pressure monitor with inductive proximity switch If the chuck is ordered with the optional mechanical pressure monitoring (SCHUNK ID no. 0818205), this option is already integrated in the chuck. The monitoring function has been set to the working pressure of 6 bar. - Page 36 Assembly After attaching the chuck and the distributor ring the mechanical pressure monitoring system should be put into operation. Insert the switch cam (93) into the rod (99) and tighten the set screw (107). Pressurize the chuck to the working pressure (6 bar) so that the jaws move radially inward.
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Page 37: Mechanical Stroke Monitoring With Inductive Proximity Switches On Dual Stroke Chucks
The left-hand inductive proximity switch should trigger when the dimension "L" of the control cam has the following dimension: ROTA TB2 470-185 LH: 29.4 mm ROTA TB2 520-191 LH: 28.7 mm ROTA TB2 600-275 LH: 28.1 mm ROTA TB2 630-275 LH: 24.1 mm ROTA TB2 685-325 LH: 28.1 mm... -
Page 38: Function
Function 5 Function The item numbers specified for the corresponding individual components relate to the chapter Drawings, [/ 57]. } 10 5.1 Principle of Operation The problem of air supply was solved by a stationary distributor ring with profiled ring seals arranged in it. Via passage openings in the two elastically radially flexible profile seals, the compressed air flows via a twin non-return valve to one of the two pressure chambers. -
Page 39: Pilot Controlled Check Valve
Function The air is only transmitted when the lathe spindle is at a standstill via profile seals arranged radially in the distributor ring. The profile seal is designed in such a way that the outer upper surface part is larger than the surface of the passage openings. -
Page 40: Faults, Causes And Solutions
Function execute only one stroke during blocking of their corresponding cylinder chambers. Both O.D. and I.D. clamping are therefore possible through the entire valve system. From cylinder From Air transmission To cylinder To distributor chamber II distributor system ring chamber I ring Locking screw Vented... -
Page 41: Control Of Types Tb2, Tb2 Lh
Function Fault Causes and solutions Dual stroke chuck: The overlap of the clamping stroke in the chuck piston When clamping the workpiece the 3 is insufficient. There is a danger that parts will be indicator pins protrude from the front damaged in the force transmission area. -
Page 42: Commissioning And Maintenance
Turning, facing or finish-turning of the ROTA TB2 power chuck is not allowed. Drilling in the front face side of the chuck is permitted only after consulting the SCHUNK technical sales department. 08.00 | ROTA TB2 / ROTA TB2 LH | Pneumatic power chuck | en | 0889132... -
Page 43: Maintenance
Commissioning and maintenance 6.2 Maintenance A type WEH maintenance unit, consisting of filter, water separator, and oiler, must be connected upstream of the power chuck. The air enriched with oil supplies all sliding parts of the cylinder chamber with an oil film. The oil level of the oil tank must be checked daily, and oil must be added if necessary. - Page 44 Commissioning and maintenance Mounted directly from front: 2 bore holes Required distance for removing the Ø L, depth C4 container Lateral mounting with two retaining Automatic condensate drain can be brackets (accessories) connected by means of a hose with inner Ø...
- Page 45 Commissioning and maintenance Flow rate characteristic curves and pressure drops Flow rate Cleaning and lubrication of the lathe chuck The even clamping force, accuracy, and life span of the chuck depend greatly on regular cleaning and sufficient lubrication. Rust, scale, casting dust, and chips produce friction and reduce motion.
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Page 46: Maintenance And Lubrication Plan
Commissioning and maintenance through-hole and by the closed base jaws. Coolant washes away lubricant. Therefore, every lathe chuck occasionally must be completely disassembled, cleaned, and lubricated, and the sealing rings replaced. The time for which the chuck can be used before full maintenance is required depends on the level of dirt it accumulates and the clamping frequency. - Page 47 Commissioning and maintenance Hardened reversible jaws should only be used in sets in accordance with the packaging, as they are ground on the chuck in sets. 1 set of hardened reversible jaws is normally ordered for a chuck. When installing and removing the reversible jaws numbered 1 to 3, make sure that the individual jaws are installed/removed on/from the base jaws with the same designation in order to ensure a high level run-out accuracy.
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Page 48: Disassembly And Assembly
Disassembly and assembly 7 Disassembly and assembly The item numbers specified for the corresponding individual components relate to the chapter Drawings, [/ 57]. } 10 7.1 Disassembly and cleaning Unscrew both the pneumatic quick coupling pieces from the distributor ring (item 8), and detach the distributor ring (item 8) from the spindle nose together with the bracket. - Page 49 Disassembly and assembly Unscrew the locking screws with the O-rings (items 10 and 48) and remove the diaphragms (item 33) from the chuck. Remove the sound absorber (item 50). ROTA TB2 without mechanical pressure monitoring: Loosen the set-screw (item 103) in the chuck body radial bore.
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Page 50: Assembly
Disassembly and assembly (item 1) and the hardened reversible jaws are designated as 1, 2, and 3 so that the same position and thus the same true running accuracy is achieved during assembly. CAUTION Parts of the indicator pin function are under spring pressure! Remove the set screw (item 27) on all 3 jaw sides and remove the compression springs (item 28), pins (item 18) and indicator pins (item 17) from the chuck. - Page 51 Disassembly and assembly For chuck sizes ROTA TB2 850 (LH) and TB2 1000 (LH) the screws (item 21) are not required, i.e. the sealing disk is inserted into the chuck body. Push the piston cover (item 6) with O-ring (items 41 and 44) into the piston (item 3) and tighten the hexagon socket screws (item 25).
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Page 52: Mounting Of Optional Mechanical Pressure Monitoring System
Disassembly and assembly 7.2.1 Mounting of optional mechanical pressure monitoring system In general, the working pressure may only be inspected for O.D. clamping. Loosen set-screw (pos. 103) at the circumference of the chuck body. Remove lock (pos. 69) with the extension (pos. 99) and the O-rings (pos. -
Page 53: Storage
Storage 8 Storage When storing the product for a longer period of time, observe the following points: Clean the product and lubricate it lightly. Store the product in a suitable transport container. Only store the product in dry rooms. Protect the product from major temperature fluctuations. NOTE: Before recommissioning, clean the product and all attachments, check for damage, functionality and leaks. -
Page 54: Part List
Part list 9 Part list When ordering spare parts, it is mandatory to specify the type, size and above all the manufacturing no of the chuck. Seals, sealing elements, screw connections, springs, bearings, screws and wiper bars plus parts coming into contact with the workpiece are not covered by the warranty. - Page 55 Part list Item Designation Quantity Note Cylindrical screw Cylindrical screw 685 / 740 / 850 / 1000 Cylindrical screw Cylindrical screw 600 / 630 Conical lubrication nipple Set-screw Compression spring O-ring 470 / 520 / 600 LH / 630 / 685 / 740 O-ring 600 / 850 / 1000 Diaphragm (quick...
- Page 56 Part list Item Designation Quantity Note Stroke monitoring extension Stroke monitoring Plate Stroke monitoring Bolt Stroke monitoring Bolt Pressure monitoring extension Set-screw O-ring Cylindrical screw Drill bushing 850 / 1000 Sword bolt Eye bolt Assembly group mechanical pressure monitoring Item Designation Quantity Cams...
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Page 57: Assembly Drawings
Assembly drawings 10 Assembly drawings ROTA TB2 470 & 520 (LH) valve only without insert 08.00 | ROTA TB2 / ROTA TB2 LH | Pneumatic power chuck | en | 0889132... - Page 58 Assembly drawings Mechanical pressure monitoring * included in the part list of the chuck Valve insert 08.00 | ROTA TB2 / ROTA TB2 LH | Pneumatic power chuck | en | 0889132...
- Page 59 H.-D. SCHUNK GmbH & Co. Spanntechnik KG Lothringer Str. 23 D-88512 Mengen Tel. +49-7572-7614-0 info@de.schunk.com schunk.com Folgen Sie uns I Follow us Wir drucken nachhaltig I We print sustainable...
- Page 60 Type designation: TB, EP, TP, ROTA-P Heinz-Dieter SCHUNK GmbH & Co. Spanntechnik KG certifies that the above-mentioned products, when used as intended and in compliance with the operating manual and the warnings on the product, are safe according to the national regulations and: −...
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