Forkardt 3QLCLM Operating Manual

Power chucks

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3QLCLM

POWER CHUCKS

O P E R A T I N G

M A N U A L

ERMAN

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Summary of Contents for Forkardt 3QLCLM

Page 1 3QLCLM POWER CHUCKS O P E R A T I N G M A N U A L ERMAN...
Page 2 3.2 Transport, handling and storage ......................10 4.0 Design and function ............................11 General description ..........................11 Constructive design ..........................12 4.2.1 Technical data / main dimensions - power chuck type 3QLCLM ............. 12 4.2.2 Design of power chuck ........................14 4.2.2.1 Chuck complete ........................... 14 4.2.2.2...
Page 3 3QLCLM Table of contents Edition: 04/2014 7.0 Initial operation ..............................37 7.1 Notes ............................... 37 7.2 Initial operation, operation ........................38 7.3 Unauthorized operating modes ........................ 38 7.4 Safety instructions ..........................38 7.5 Behavior in case of faults ......................... 38 7.6 Measures during longer standstill ......................
Page 4 1.0 General information about the documentation 1.1 General information This operating manual contains the required information for the intended use of 3-jaw power chuck with balancing of centrifugal force type 3QLCLM. The manual is meant for technically qualified persons. Qualified persons are: •...
Page 5 The company retains the copyright for this operating manual. FORKARDT DEUTSCHLAND GMBH Lachenhauweg 12 72766 Reutlingen Germany Telephone: +49 7127 5812 0 Fax: +49 7127 5812 122 Administration and central warehouse: Lachenhauweg 12, 72766 Reutlingen Made in Germany © 2014 COPYRIGHT FORKARDT DEUTSCHLAND GMBH...
Page 6 3QLCLM Table of contents Edition: 04/2014 Safety instructions General information Power chucks may result in risks if their use and handling does not correspond to the safety requirements. The power chuck has been built based on state-of-the-art technology and is safe to use.
Page 7 Its axial actuating force must be suitable for the power chuck. The power chuck 3QLCLM must be used only for its intended purpose. Intended use is the clamping of work pieces on lathes and other tooling machines.
Page 8 Check the affected parts of the power chuck in such case with a suitable and non-destructive test method and check for cracks and replace the chuck in case of any damage. Only use original FORKARDT spare parts.
Page 9 3QLCLM Table of contents Edition: 04/2014 2.5 Safety conditions for power chucks The safety conditions for the operation of power chucks are defined in the testing principles of the trade associations as well as DIN, VDE and VDI guidelines. The individual test conditions are guaranteed...
Page 10 3QLCLM Table of contents Edition: 04/2014 3.0 Transport and storage 3.1 Packaging, disassembly level The weight of the product and transport route are also decisive for the packaging type. The power chuck are wrapped in oil paper or clear foil to protect against dirt.
Page 11 (developed and manufactured under ISO 9001). Power chuck sizes of 160, 200, 250, 315 and 400 mm diameter. The main features of Type 3QLCLM power chuck are described below: •...
Page 12 3QLCLM Table of contents Edition: 04/2014 4.2 Constructive design 4.2.1 Technical data / main dimensions - power chuck type 3QLCLM 3QLC 315-LM-Z11-KDIN 60KN max 4000 U/min...
Page 13 3QLCLM Table of contents Edition: 04/2014 Technical data / main dimensions Power chuck Type 3QLCLM Chuck type 3QLCLM 160-38 200-54 250-72 315-88 400-126 Ident-No. 191203000 191216000 190476000 Max. actuation force - F max 4000 6000 6000 Max. gripping force - Fsp max...
Page 14 3QLCLM Table of contents Edition: 04/2014 4.2.2 Design of the power chuck 4.2.2.1 Complete chuck JAW COMPLETE CHUCK BODY CHUCK COVER COMPLETE CENTRIFUGAL FORCE ACCESSORIES ACTUATOR COMPLETE CHUCK FIXING SCREWS 4.2.2.2 Centrifugal force accessories Lever Centrifugal force weight Chuck-Ø Centrifugal force...
Page 15 3QLCLM Table of contents Edition: 04/2014 4.2.2.3 Chuck body complete COUNTERSUNK SCREW ACTUATOR O-RING 5 LOCK SCREW SEALING DISC CHUCK BODY O-RING 4 PROTECTIVE SLEEVE O-RING 3 O-RING 1 CYLINDER SCREWS COVER FIXING 0 O-RING 2 CYLINDER SCREWS COVER FIXING 0 Chuck-Ø...
Page 16 3QLCLM Table of contents Edition: 04/2014 4.2.2.4 Chuck cover complete CYLINDER SCREW CHUCK COVER O-RING 3 O-RING 2 O-RING 1 Chuck-Ø Cylinder screws Chuck cover O-Ring 1 O-Ring 2 O-Ring 3 701B010360 191204001 711A020107 711A015015 711A015014 701B010380 191216005 711A030191 711A025075...
Page 17 3QLCLM Table of contents Edition: 04/2014 4.2.2.5 Jaw complete CYLINDER SCREW O-RING A O-RING B ADAPTER JAW CYLINDER SCREWS FOR TOP JAWS BASE JAW SLIDING BLOCK SEALING FRAME CYLINDER SCREWS FOR FIXING THE ADAPTER JAW Chuck-Ø Cylinder screws Cylinder screw top...
Page 18 (inside clamping of hollow work pieces). The power chuck type 3QLCLM is equally suitable for both clamping devices. The monitoring of the clamping path is done through radially arranged limit switch on the clamping...
Page 19 This simple, robust and direct centrifugal force compensation system ensures high gripping force of the 3QLCLM power chuck in the entire speed range on the one hand and allows selective processing with reduced gripping force on the other hand even at maximum finishing speeds.
Page 20 3QLCLM Table of contents Edition: 04/2014 Clamping jaw 4.4.1 General information The power chuck is a connecting element between the lathe and the work piece to be processed. The power produced by the lathe is transmitted to the spindle nose by the power chuck and to the transfer point between power chuck and work piece by the positive driving of the closed chuck jaws.
Page 21 3QLCLM Table of contents Edition: 04/2014 • When inserting the work pieces into the power chuck, one top jaw must always be placed at the bottom so that jamming of the work piece between two top jaws is avoided. •...
Page 22 3QLCLM Table of contents Edition: 04/2014 5.0 Chucking force 5.1 General notes The connection of the power chuck to the work piece is force-locking, i.e. the force transfer happens by pressing the chuck jaw (master jaw with top jaw) to the work piece. The contact pressure required for creating this force locking is called as gripping force.
Page 23 3QLCLM Table of contents Edition: 04/2014 5.3 Dynamic gripping force The dynamic gripping force F is the total force (daN) supplied by all of the jaws under dynamic conditions and represents the minimum value of the available gripping force under normal operating conditions.
Page 24 3QLCLM Table of contents Edition: 04/2014 5.4 Gripping force calculation Calculation of the dynamic gripping force and the actual loss of gripping force ΔF following formula is applicable for Type 3 QLCKT: whereby the available static gripping force Fspo (at spindle speed n = 0) is:...
Page 25 3QLCLM Table of contents Edition: 04/2014 For each application it is necessary to check that the available dynamic gripping force is adequate. In the case of gripping jaws made from self-made jaws or other special jaws, the actual centrifugal moment has to be determined from the weight...
Page 26 3QLCLM Table of contents Edition: 04/2014 Determination of the gripping force Fspz required for the machining process The gripping force required for each application has to be determined. If this gripping force cannot be provided by the chuck with the factors of safety given by the...
Page 27 3QLCLM Table of contents Edition: 04/2014 Terms used in the formulas: Gripping coefficient μsp Material Jaw design Material surface at the gripping point Overhang of the work piece Depth of cut Steel 0.15 - 1 ) Feed 0.14 Specific cutting force 0.09...
Page 28 3QLCLM Table of contents Edition: 04/2014 5.6 Permissible overhang length 0.75 D Total gripping force I Jaw forces Simple safety against the work piece flying out of the chuck from the cutting force component P is ensured when the friction force |i /3 and P are in equilibrium.
Page 29 3QLCLM Table of contents Edition: 04/2014 6.0 Assembly Actions to be taken before assembly 6.1.1 Checking the spindle nose of the chuck flange The mounting surfaces on the spindle nose have to be checked with a dial gage to ensure that high accuracy in...
Page 30 3QLCLM Table of contents Edition: 04/2014 Attention: Do not allow the outer rim of the power chuck to rest on the mounting flange. Threaded bores must be drilled in the mounting flange for attachment of balancing weights which, depending on the size of the power chuck to be mounted, should be be-tween M8 and M16 with a thread depth of max.
Page 31 3QLCLM Table of contents Edition: 04/2014 Right hand stop Attention: The length of the draw tube has to be arranged so that the setting dimension "E" is obtained in the position shown. Dimension "E" is the measured distance between the contact surface of the power...
Page 32 Clean the register and locating faces of the adapter flange (adapter disc)! However, in case the machine’s chucking equipment is frequently changed, the draw tube should be screwed into the thread of the 3QLCLM power chuck and Loctite 290 should be used to secure it against loosening!
Page 33 3QLCLM Table of contents Edition: 04/2014 Screw the draw tube into the thread of the chuck piston. Secure the draw tube with Loctite 290! When screwing the draw tube in the chuck piston, take care not to damage the O - ring!
Page 34 3QLCLM Table of contents Edition: 04/2014 6.4 Tightening torques of shaft screws 6.4.1 Tightening torques of chuck mounting bolts Bolts in accordance with DIN 912 Quality 10.9 Manufactured in accordance with DIN 267 Thread M 10 M 12 Tightening torque...
Page 35 3QLCLM Table of contents Edition: 04/2014 After mounting the complete power chuck system, check for imbalance and compensate any remaining imbalance by screwing in corresponding threaded studs to DIN • on the cylinder side into thread d of the cylinder flange, •...
Page 36 3QLCLM Table of contents Edition: 04/2014 6.5 Preparations for using the power chuck After the chuck has been mounted but before it is used, the following steps must be taken to ensure trouble-free operation: • Clean everything from the machine that does not belong to it (e.g. assembly tools).
Page 37 3QLCLM Table of contents Edition: 04/2014 Commissioning Notes The initial period of use has a marked effect on the satisfactory performance of the power chuck. The mounting of the power chuck should be checked at this stage. Mount the top jaws centrically and then connect to the master jaws (observe the marks...
Page 38 3QLCLM Table of contents Edition: 04/2014 7.2 Operation Insert and grip the work piece in the power chuck. Start the machine and wait for the machine program to enable the spindle rotation. Do not start the machine spindle until the actuating cylinder has built up sufficient pressure and...
Page 39 3QLCLM Table of contents Edition: 04/2014 We recommend that a lockable switch be fitted which prevents an inadvertent starting of the machine spindle during repairs or in the event of a malfunction. The following table lists the symptoms, causes and the measures to be taken into the event of any malfunctions of the power chuck. We cannot guarantee for the exhaustiveness of this list due to wide range of influencing factors (level of knowledge of the operating personnel, etc.).
Page 40 Shell Tellus 141 Aral oil TU 528 D.T.E.26 Nuto H 64 62.0 Lubricant for the power chuck Name Type FORKARDT special grease FORKARDT special grease Mobil oil Vactra Oil No.4 Product numbers see in Section Spare parts and customer service...
Page 41 3QLCLM Table of contents Edition: 04/2014 8.0 Maintenance FILL THE POWER CHUCK WITH LUBRICANT AT THE MARKED HOLES WHEN FILLING MAKE SURE THAT BOTH OPENINGS ARE 8.1 Lubrication POINTING UP AT THE SAME ANGLE Foreign matter penetrates into practically every power chuck during machining. Chips, scale and...
Page 42 Weekly Check the F 0 with a gripping force measuring device, e.g. FORKARDT SKM 1200 / 1500. Weekly Functional test of the power chuck system. Monthly / quarterly / semi-annual Check the master jaw, chuck actuator, lever and sealings for wear.
Page 43 3QLCLM Table of contents Edition: 04/2014 After pulling the power chuck from the machine, screw the drawbar from the actuator Remove screws for top jaw mounting bolts and screws for intermediate jaw mounting bolts. Now you can remove the intermediate jaw and the O-rings Remove screws for cover bolts.
Page 44 3QLCLM Table of contents Edition: 04/2014 Countersunk screws Remove protection sleeve. Now you can remove the protective sleeve and the O-rings Remove the cylinder screws for sliding blocks. Now the sliding bolts can be removed. Even the sealing frames at the master jaw and associated O-rings can be removed as next step.
Page 45 3QLCLM Table of contents Edition: 04/2014 Pull the actuators from the chuck body. The master jaws will move into the center of the chuck. When the actuators are removed, the master jaws can be pushed into the center one after another and then removed from top.
Page 46 Take the product numbers of the components from the component list in Section Design and function Manufacturer's warranty is applicable only for original parts from FORKARDT. We are not liable for any damages resulting from the usage of foreign parts.
Page 47 3QLCLM Table of contents Edition: 04/2014 9.3 Customer service Following data must be specified when ordering spare parts: Description Quantity Ident-No. FORKARDT DEUTSCHLAND GMBH Lachenhauweg 12 72766 Reutlingen +49 7127 5812 0 Telephone +49 7127 5812 122...
Page 48 • Responsible for the documentation: Date/manufacturer's signature: Reutlingen Location: 04.06.2019 (Management) Declaration of incorporation number: 3QLCLM.D Since we are constantly striving to improve our products, the dimensions and information may not correspond to the recent designs, therefore such information is not binding.
Page 49 3QLCLM Table of contents Edition: 04/2014...
Page 50 Fax: (+1) 231 995-8361 Waigaoqiao FTZ CHINA 200131, CHINA Email: sales@forkardt.us Phone: (+86) 21 5868 3677 Email: info@forkardt.cn.com FORKARDT INDIA LLP Plot No. 39 D.No.5-5-35 Ayyanna Ind. Park IE Prasanthnagar, Kukatpally Hyderabad - 500 072, India Phone: (+91) 40 400 20571 Fax: (+91) 40 400 20576 WWW.FORKARDT.COM...