Related Manuals for SCHUNK ROTA THW Series
Summary of Contents for SCHUNK ROTA THW Series
- Page 1 Translation of original operating manual Power chuck ROTA THW / THWB Assembly and operating manual Superior Clamping and Gripping...
- Page 2 Imprint Copyright: This manual is protected by copyright. The author is SCHUNK GmbH & Co. KG. All rights reserved. Any reproduction, processing, distribution (making available to third parties), translation or other usage - even excerpts - of the manual is especially prohibited and re- quires our written approval.
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Page 3: Table Of Contents
Table of contents Table of contents 1 General ........................5 1.1 About this manual ....................5 1.1.1 Presentation of Warning Labels ..............5 1.1.2 Applicable documents ................... 6 1.1.3 Sizes ....................... 6 1.2 Warranty ........................6 1.3 Scope of delivery ...................... 6 2 Basic safety notes .................... - Page 4 Table of contents 4 Function ........................28 4.1 Function of the chuck ..................... 28 4.2 Functional testing ....................28 4.3 Handling the chuck and the base jaws ..............29 4.4 Base jaw position ....................30 4.5 Exchanging and turning the top jaws ..............30 5 Transport ........................
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Page 5: General
General General About this manual This manual contains important information for a safe and appro- priate use of the product. This manual is an integral part of the product and must be kept accessible for the personnel at all times. Before starting work, the personnel must have read and under- stood this operating manual. -
Page 6: Applicable Documents
• Catalog data sheet of the purchased product * • Calculation of the jaw centrifugal forces, "Technology" chapter in the lathe chuck catalog * The documents marked with an asterisk (*) can be downloaded on our homepage schunk.com 1.1.3 Sizes This operating manual applies to the following sizes: •... -
Page 7: Basic Safety Notes
Basic safety notes Basic safety notes Intended use This product is intended for clamping workpieces on machine tools and other suitable technical devices. • The product may only be used within the scope of its technical ( 3, Page data, 17). -
Page 8: Spare Parts
Use of unauthorized spare parts Using unauthorized spare parts can endanger personnel and damage the product or cause it to malfunction. • Use only original spare parts or spares authorized by SCHUNK. Chuck jaws Requirements of the chuck jaws Stored energy can make the product unsafe and risk the danger of serious injuries and considerable material damage. -
Page 9: Environmental And Operating Conditions
Basic safety notes Environmental and operating conditions Required ambient conditions and operating conditions Incorrect ambient and operating conditions can make the product unsafe, leading to the risk of serious injuries, considerable material damage and/or a significant reduction to the product's life span. •... -
Page 10: Personal Protective Equipment
Basic safety notes Service personnel of Due to its technical training, knowledge and experience, service the manufacturer personnel of the manufacturer is able to perform the delegated tasks and to recognize and avoid possible dangers. Personal protective equipment Using personal protective equipment Not wearing personal protective equipment while working with the product, may result in dangers that impact the personnel's safety and health. -
Page 11: Transport
Basic safety notes 2.10 Transport Handling during transport Incorrect handling during transport may impair the product's safety and cause serious injuries and considerable material damage. • When handling heavy weights, use lifting equipment to lift the product and transport it by appropriate means. •... -
Page 12: Protection During Handling And Assembly
Basic safety notes • If the energy supply is connected, do not move any parts by hand. • Do not reach into the open mechanism or movement area of the product during operation. 2.13.1 Protection during handling and assembly Incorrect handling and assembly Incorrect handling and assembly may impair the product's safety and cause serious injuries and considerable material damage. -
Page 13: Notes On Particular Risks
Basic safety notes • Never rely solely on the response of the monitoring function to avert danger. Until the installed monitors become effective, it must be assumed that the drive movement is faulty, with its action being dependent on the control unit and the current operating condition of the drive. - Page 14 Basic safety notes DANGER Risk of fatal injury to operating personnel due to the workpiece falling down or being flung out in the event of a power failure In the event of a power failure, the lathe chuck's clamping force may fail immediately and the workpiece may be released in an uncontrolled manner.
- Page 15 Basic safety notes DANGER Possible risk of fatal injury to operating personnel from clothing or hair being caught on the lathe chuck and being dragged into the machine Loose clothing or long hair may become caught on projecting parts of the lathe chuck and be drawn into the machine. •...
- Page 16 Basic safety notes CAUTION Risk of burns due to workpieces with high temperatures. • Wear protective gloves when removing the workpieces. • Automatic loading is preferred. CAUTION Danger of damage due to incorrectly selected clamping position of the clamping jaws to the workpiece. An incorrectly selected clamping position of the clamping jaws to the workpiece can result in damage to the base and top jaws.
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Page 17: Technical Data
"Technology" chapter of the SCHUNK lathe chuck catalog Max. jaw eccentricity of and in the "Chuck jaws in special design/technology" center of gravity in axial chapter of the SCHUNK chuck jaws catalog. These catalogs direction a [mm] can be downloaded from schunk.com . -
Page 18: Clamping Force / Speed Diagrams
SHB, SWB and SWB-AL. The maximum actuating force was introduced and the jaws were placed flush with the base jaw outer edge. The chuck is in perfect condition and lubricated with SCHUNK LINO MAX special grease. Should one or several of the above mentioned parameters be changed the diagrams are no longer valid. - Page 19 Technical data Clamping force / speed diagrams ROTA THW 400-120 Clamping force / speed diagrams ROTA THW 500-128 Clamping force / speed diagrams ROTA THW 630-160 02.00|ROTA THW / THWB |en...
- Page 20 Technical data Clamping force / speed diagrams ROTA THWB 210-52 Clamping force / speed diagrams ROTA THWB 265-71 Clamping force / speed diagrams ROTA THWB 315-86 02.00|ROTA THW / THWB |en...
- Page 21 Technical data Clamping force / speed diagrams ROTA THWB 400-120 Clamping force / speed diagrams ROTA THWB 500-128 Clamping force / speed diagrams ROTA THWB 630-160 02.00|ROTA THW / THWB |en...
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Page 22: Calculations For Clamping Force And Speed
Technical data 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 [Nm] Effective clamping force [N] Centrifugal torque of base jaws [Nm] Minimum required clamping force [N] n Speed [rpm] spmin Initial clamping force [N]... - Page 23 Technical data Reduction in effective clamping force by the magnitude of the total centrifugal force, for gripping from the outside inwards. The required effective clamping force for machining F is calculat- ed from the product of the machining force F and the safety factor S .
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Page 24: Calculation Example: Required Initial Clamping Force For A Given Speed
Technical data The formula for the calculation of the total centrifugal force F For this, n is the given speed of rotation in . The product m ∙ r is referred to as the centrifugal force torque M In case of toolholders with split chuck jaws, i.e., with base jaws and top jaws, for which the base jaws change their radial position only by the stroke amount, the centrifugal torque of the base jaws and the centrifugal torque of the top jaws M... -
Page 25: Calculation Of The Permissible Speed In Case Of A Given Initial Clamping Force
Technical data Initial clamping force during shutdown: Calculation of total centrifugal force: For two-part chuck jaws, the following applies: Centrifugal torque of base jaw and top jaw specified in "Chuck data" table: For the centrifugal torque of the top jaw, the following applies: Centrifugal torque for one jaw: The chuck has 3 jaws, the total centrifugal torque is: The total centrifugal force can now be calculated:... -
Page 26: Grades Of Accuracy
Technical data Example of calculation: Permissible RPM for a given effective clamping force The following data is known from previous calculations: • Initial clamping force during shutdown F = 17723 N • Machining force for machining job F 3000 N (application- specific) •... -
Page 27: Torques Per Screw
Technical data 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 120 160 200 290 400 500 1050 1500 (Nm) Tightening torques for mounting screws used to attach top jaws... -
Page 28: Function
Function Function Function of the chuck The type THW quick-change power chucks are actuated using a rotating solid or open-center hydraulic cylinder. The axial tensile or pressure forces are converted to the radial jaw clamping force via wedge bars positioned tangentially to the chuck body. Functional testing Functional test After installation of the chuck, its function must be checked prior... -
Page 29: Handling The Chuck And The Base Jaws
Function Handling the chuck and the base jaws The clamping and opening path of the chuck jaws is determined by the clamping cylinder. The base jaws with screwed-on top jaws are moved or changed in the open clamping position. For safety reasons, the serration for the base jaws is still engaged in this chuck piston position. -
Page 30: Base Jaw Position
Function Base jaw position A marking line between the jaw guides is milled on the face side of the chuck (see drawing( 9, Page 40)). This marking line is the positioning aid for the base jaws or top jaws. The outermost base jaw or monoblock position is reached when the front face of the base jaw or the unsplit top jaw agrees with the marking line in the jaw change position (chuck open). -
Page 31: Transport
Transport Transport DANGER Risk of fatal injury from suspended loads! Falling loads can cause serious injuries and even death. • Use suitable lifting equipment. • Secure the product to prevent it from falling. • Stand clear of suspended loads and do not step within their swiveling range. -
Page 32: Mounting
Mounting Mounting Installing and connecting WARNING Risk of injury due to unexpected movements! If the power supply is switched on or residual energy remains in the system, components can move unexpectedly and cause seri- ous injuries. • Before starting any work on the product: Switch off the power supply and secure against restarting. - Page 33 Mounting Piston in foremost position R1 = Push the chuck piston to its foremost position and measure with a depth gauge R2 = R1 + 0.3 mm (max. + 0.5 mm) You have to ensure that the piston can be moved to the foremost (jaw change) position.
- Page 34 Lubricating before commissioning the lathe chuck Before commissioning, move the chuck into the open position. Using a high-pressure grease press, press SCHUNK special grease LINOMAX into the lubricating nipple every 3 strokes. For optimal grease distribution and to achieve the maximum clamping force, close and open the chuck multiple times over the entire clamping stroke.
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Page 35: Maintenance
Move the chuck into the open position. Lubricate the chuck at the three lubrication nipples (A) using a high-pressure grease gun with two to six strokes (depending on the chuck side) of SCHUNK LINOMAX special grease at each nipple. For optimum grease distribution, the clamping piston must travel the entire clamping stroke several times after lubrication. -
Page 36: Maintenance Intervals
Maintenance Maintenance intervals Lubrication of the grease areas: Lubrication interval Strain every 25 hours normal / coolant utilization every 8 hours high / coolant utilization after 1200 hours or Total cleaning with disassembly of the as needed chuck, depending on type and degree of contamination Technical condition With the smallest possible actuating pressure (hydraulic cylinder),... - Page 37 Lubricate thoroughly with LINOMAX grease before installation. Clean all individual components and check them for damage and wear. Only original SCHUNK spare parts may be used. The chuck is assembled in the same way, but in reverse order. Before installation, lubricate parts well with LINOMAX special grease paste.
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Page 38: Chuck Mounts And Spare Parts
Chuck mounts and Spare parts Chuck mounts and Spare parts Chuck mounts SCHUNK type Chuck mount Id. No. ROTA THW 165-37 R Z 140 800 000 800 001 800 002 Z 170 800 010 ROTA THW 215-52 R 800 011... -
Page 39: Spare Parts
Chuck mounts and Spare parts Spare parts When ordering spare parts, it is imperative 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 40: Drawings
Drawings Drawings 02.00|ROTA THW / THWB |en... - Page 41 Drawings 02.00|ROTA THW / THWB |en...
- Page 42 Drawings 02.00|ROTA THW / THWB |en...
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Page 43: Translation Of The Original Declaration Of Incorporation
Translation of the original declaration of incorporation in terms of the Directive 2006/42/EG, Annex II, Part 1.B of the European Parliament and of the Council on machinery. Manufacturer/ SCHUNK GmbH & Co. KG Spann- und Greiftechnik Distributor Bahnhofstr. 106 – 134 D-74348 Lauffen/Neckar... -
Page 44: Appendix On Declaration Of Incorporation, As Per 2006/42/Ec, Annex Ii, No. 1 B
Appendix on Declaration of Incorporation, as per 2006/42/EC, Annex II, No. 1 B Appendix on Declaration of Incorporation, as per 2006/42/EC, Annex II, No. 1 B 1. Description of the basic safety and health protection requirements, as per 2006/42/EC, Annex I, that apply to and are fulfilled for the scope of the partly completed machinery: Product designation Power chuck with quick jaw change system... - Page 45 Appendix on Declaration of Incorporation, as per 2006/42/EC, Annex II, No. 1 B 1.4.2.2 Interlocking movable guards 1.4.2.3 Adjustable guards restricting access 1.4.3 Special requirements for protective devices Risks due to other hazards 1.5.1 Electricity supply 1.5.2 Static electricity 1.5.3 Energy supply other than electricity 1.5.4 Errors of fitting...
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