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SCHUNK SRU 20 Assembly And Operating Manual Download Page 26

Function and handling 

 

  

 

26 

12.03|SRU 20 - 60|en 

 

 

Locked center position (variant VM) 

  

 

 

WARNING 

Risk of injury if the machine/system moves unexpectedly! 
In an EMERGENCY STOP situation, the center position lock can 
come loose 

•  Swivel the module to one of the limit positions to restart. 

  

  

 

NOTICE 

The pistons can be damaged if incorrectly controlled. 

•  The locking pistons must be free to extend without striking the 

drive pistons. 

•  Note the circuit diagram 

(

 7.3, Page 27)

. 

  

If this option is selected, the locking pistons can stop the rotating 
motion in the center position and enable it again. The center posi-
tion can be adjusted by ± 3°. 
 
Move from the 0° position to the center position 

1  Extend locking piston C. 
2  Actuate connection A. 

Move from the 180° position to the center position 

1  Extend locking piston D. 
2  Actuate air connection B. 

 

  

 

NOTE 

Before actuating C and D, connections A and B must be completely 

ventilated. 

 

 

7.3 

Summary of Contents for SRU 20

Page 1: ...Translation of the original manual Pneumatic Swivel Unit SRU 20 60 Assembly and operation manual Superior Clamping and Gripping ...

Page 2: ... 16 01 2014 en SCHUNK GmbH Co KG All rights reserved Dear customer congratulations on choosing a SCHUNK product By choosing SCHUNK you have opted for the highest precision top quality and best service You are going to increase the process reliability of your production and achieve best machining results to the customer s complete satisfaction SCHUNK products are inspiring Our detailed assembly and...

Page 3: ...8 3 Warranty 10 4 Scope of delivery 10 5 Technical data 10 6 Assembly and Commissioning 11 6 1 Mechanical connection 11 6 2 Air connection 12 6 3 Adjusting the end positions 15 6 4 Shock absorber travel fine adjustment SRU 50 und SRU 60 16 6 5 Adjusting the center position variant M 18 6 6 Adjusting the center position variant VM 19 6 7 Mounting and adjusting the sensors 20 6 7 1 Magnetic switch M...

Page 4: ... 2 Disassembling the center position variant M and VM 32 8 4 Replacing a shock absorber 33 8 4 1 How to use the shock absorbers and installation dimensions 36 8 4 2 Measuring instruction 37 8 5 Servicing and assembling the module 38 9 Assembly drawings 39 10 Seal kit 42 11 Accessories pack 43 12 Wear parts 44 13 Translation of original declaration of incorporation 47 ...

Page 5: ...an gers Key words DANGER Dangers for persons Non compliance will inevitably cause irreversible injury or death WARNING Dangers for persons Non compliance may cause irreversible injury or death CAUTION Dangers for persons Non observance may cause minor injuries NOTICE Information about avoiding material damage Symbols Warning about a danger point Warning about hand injuries General mandatory sign t...

Page 6: ...Not intended use Use which is not specified as an intended use is for instance when the product is for example used as a pressing tool stamping tool lifting tool guide for tools cutting tool tensioning mean boring tool Environmental and operating conditions The module may be used only in the context of its defined ap plication parameters 5 Page 10 Make sure that the module is a sufficient size for...

Page 7: ...ive equipment per EC Machinery Directive Constructional changes attachments or modifications Additional drill holes threads or attachments that are not offered as accessories by SCHUNK may be attached only with permission of SCHUNK Personnel qualification The assembly initial commissioning maintenance and repair of the product may be performed only by trained specialist person nel Every person cal...

Page 8: ...erally valid Remove the energy supplies before installation modification maintenance or adjustment work Make sure that no residual energy remains in the system Do not move parts by hand when the energy supply is con nected Do not reach into the open mechanism or the movement area of the unit Perform maintenance modifications and additions outside the danger zone Secure the product during all opera...

Page 9: ...e The danger zone must be surrounded by a safety fence during operation WARNING Risk of injury due to loosened parts and destruction of the swi velling unit due to damaged shock absorbers Avoidance Regular inspection of the individual components on wear and damage WARNING Note that suitable emergency off strategies e g controlled shut down and restarting strategies e g pressure build up valves app...

Page 10: ...andatory maintenance and lubrication intervals Observe the environmental and operating conditions Parts touching the work piece and wear parts are not part of the warranty Scope of delivery The scope of delivery includes Pneumatic Swivel Unit SRU in the ordered model Accessory pack Technical data Basis data Designation Value Noise emission dB A 70 Pressure medium Compressed air compressed air qual...

Page 11: ...ly Switch off power supply The module can be mounted from the base 2 1 Fig 1 Mounting possibilities 1 Use the centering sleeves from the enclosed pack 2 Secure the module from the output side via the drill holes provided for this purpose or at the base using the threads 3 4 2 1 2 4 Fig 2 Mount attachment parts on the pinion 6 6 1 Assembly Fastening at the base ...

Page 12: ... 2 Attach the mounting plate via the 4 threaded holes 2 3 Secure attachment on the mounting plate Air connection WARNING Risk of injury when the machine system moves unexpectedly Remove the energy supplies Make sure that no residual energy remains in the system NOTICE Observe the requirements for the air supply 5 Page 10 Technical Data Only open the air connections required Seal air connections no...

Page 13: ...Swiveling 0 90 0 180 3 d Approach center position M Extend locking piston VM 4 c 5 C Hose connection Approach center position M Extend locking piston VM 6 D 7 A Swiveling 0 90 0 180 8 B Swiveling 90 0 180 0 Pay attention to the following table when using flow controls 1 The air connections labeled C and D must be pressurized simultaneously with a t joint Air connection for variants with center pos...

Page 14: ...ter positi on Exhaust air throt tle or no throttle Exhaust air throt tle or no throttle With center position M Exhaust air throt tle or no throttle Exhaust air throt tle or no throttle Supply air throttle or no throttle Supply air throttle or no throttle With locked center position VM VM Exhaust air throt tle or no throttle Exhaust air throt tle or no throttle Supply air throttle or no throttle or...

Page 15: ... 20 40 4 SRU 50 60 5 2 Apply air to connection B Unit swivels to stop A 1 basic setting 0 3 Set the desired end position by turning stop A For SRU 50 60 depressurize before adjusting 4 Vent connection B and apply air to A The unit swivels to stop B 3 basic setting 180 5 Set the required limit position by rotating stop B 3 For SRU 50 60 depressurize before adjusting 6 Tighten Screws 2 fully SRU 20 ...

Page 16: ...hock absorber travel fine adjustment SRU 50 und SRU 60 NOTICE The module can leak if the maximum adjustment range is ex ceeded Note the maximum adjustment range of 3 mm of the fine ad justment Fig 5 Shock absorber fine adjustment 1 Stop A 2 Stop B 6 4 ...

Page 17: ... striker pin 2 with a hexagon socket key 10 b To adjust the damping in the end position 180 loosen the nut item 101 b at the limit B using a spanner 30 while counterholding the striker pin 4 with a hexagon socket key 10 2 Turning out the striker pin shortens the damping travel by 1 5 mm per revolution max 3 mm 3 Swivel the loaded unit to check the damping effect The end positions must be arrived a...

Page 18: ...d D 6 as far as the limiting sleeve 5 3 Apply air to the air connections marked C and D together The unit swivels to approx 90 and has approx 6 play in this position 4 Rotate the pinion clockwise and press it against stop C 4 5 Turn stop C 4 until the desired centre position is reached 6 Turn stop D 6 until the pinion has no more play in centre po sition 7 Tighten the screw 3 securely again SRU 20...

Page 19: ...p C 2 Stop A 6 Limiting sleeve 3 Bore hole for hexagon socket wrench 4 Internal screw 7 Stop D Depending on the start up direction of stop A 2 or stop B 1 the center position can be set the same or differently 1 Ventilate all air connections 2 Loosen the screw 4 about one turn with hexagon socket wrench SRU plus 20 40 4 SRU 50 60 5 3 Actuate air connection B The module swivels to stop A 2 4 Ventil...

Page 20: ...e swivels to stop D 7 basic setting 90 10 Turn stop D 7 to the required center position 11 Re tighten the screw 4 again SRU 20 40 10Nm SRU 50 60 24Nm 12 Swivel repeatedly to test the center position setting 7 3 Page 27 Mounting and adjusting the sensors The module is prepared for the use of the sensors IN 80 and MMS 22 1 If you require further information on sensor operation con tact your SCHUNK c...

Page 21: ...e groove 3 Move the magnetic switch along the groove until it actuates 4 Secure the magnetic switch see enclosed data sheet 5 Check the switch position of the magnetic switch by swiveling the module repeatedly NOTE We recommend the use of four magnetic switches to monitor the locked center position One sensor each to monitor the two limit positions For monitoring approach to the center position fr...

Page 22: ...e them in this position with the locking nut 94 3 Fit the control cams 92 and 93 to the control cam retaining plate item 96 and mount these on the pinion using the centr ing sleeves 4 Turn the pinion anti clockwise as far as stop A Using a hex agon socket wrench loosen the long control cam 93 and move it until it touches the proximity switch at stop A Turn the pinion back again and fix the control...

Page 23: ...the locating bolt will have to be slackened off again 6 Once you have set the sensing distance tighten the locating bolt fully by turning clockwise 7 Proceed as above for setting the centre position and stop B Take care to ensure that the sensors do not collide with the control cams during swivel movements ...

Page 24: ...connection A The pinion turns clockwise up to the stop B 1 Pressurize air connection B The pinion turns back to the stop A Fig 8 end position adjustability 3 Fig 9 end position adjustability 90 Fig 10 Variant swivel angle 90 7 7 1 Basic setting 180 Basic setting 0 Setting ranges of the Variants ...

Page 25: ...ir connections C and D The pinion rotates to the centre position The centre position can be adjusted by 3 Due to the way in which the unit works overshoot may occur in the centre position Fig 11 Actuation with a 5 3 way and a 3 2 way valve Fig 12 1 Exhaust line 7 2 Basic setting 90 ...

Page 26: ...istons must be free to extend without striking the drive pistons Note the circuit diagram 7 3 Page 27 If this option is selected the locking pistons can stop the rotating motion in the center position and enable it again The center posi tion can be adjusted by 3 Move from the 0 position to the center position 1 Extend locking piston C 2 Actuate connection A Move from the 180 position to the center...

Page 27: ... of the drive pistons e g horizontal swivel axis with an asymmetrical load the separator sleeves item 96 in the en closed pack must be screwed into the air connections A1 and B1 The two cylinder areas of connections A and B can then each be actuated separately The following illustration shows holding the load at 0 by keeping B1 loaded until C is locked Circuit diagram control example ...

Page 28: ...ossible to load just one piston area 1 or 2 The following piston areas should be loaded at least in the end and or centre position to avoid play in the output shaft 0 B1 180 A1 90 A2 respectively B2 By installing the separator sleeve it is also possible to insert ex haust flow controls in the connections A1 and B1 A2 and B2 then remain unrestricted ...

Page 29: ...rom the accessory pack in to hose connection holes A and B until the end of the threads 2 Screw back until the flattened side points towards the middle of the housing 3 Check the correct orientation With the orientation of the Allen key After removing the set screw 34 via direct air connections on the laterally mounting surface 4 Fit the hose connections A1 A2 B1 and B2 Position of the hose connec...

Page 30: ...r testing of the seals and the mechanism after around 4 million swivel movements re spectively 2 million cycles Lubricants Lubrication points basic lubrication We recommend the lubricants listed During maintenance treat all greased areas with lubricant Thinly apply lubricant with a lint free cloth Lubrication point Lubricant the teeth and the pinion LINOMAX Metallic sliding surfaces Renolit HLT 2 ...

Page 31: ...e curved cover 5 With centre setting Unscrew the bolt 35 on stops C and D by one revolution Remove the fastening bolt 58 of the locating sleeve 25 Unscrew stops C and D until the centre position housing 14 can be removed 3 Mark the installation position of the pinion 2 19 and the piston 24 4 Disassemble the protective cover 22 and the snap ring on the pinion 49 5 Media feed through option Remove t...

Page 32: ... There is a pre loaded compression spring in the interior Carefully disassemble the module Position of the position numbers 9 Page 39 1 Pull stops C and D out of the housing 14 2 Remove the cover 18 of the adjusting sleeve 16 3 Remove the stop piston 17 4 Locked center position only Remove the locking ring 51 on the stop piston 17 8 3 2 ...

Page 33: ...t positions Base unit with internal shock absorber Fig 16 Fig 17 Position numbers not listed 9 Page 39 1 Before turning secure the adjusting sleeves 6 with a spanner wrench with pin DIN 1810 form B Should this key not be on hand loose the clamping screw 35 about approx 1 turn and remove the stop cover 8 and stop sleeve 6 together After replacing the shock absorber the end position must be read jus...

Page 34: ...h the stop cover 8 screw it into place and secure with Loctite Nr 243 Option locked center position VM variant Fig 18 1 Release the lock nuts 74 of the shock absorber 2 Unscrew the shock absorber from the thread 3 Fully screw in the new shock absorber 4 Fit the O ring 47 on the shock absorber 5 Screw on the lock nuts 74 and tighten them 6 Swivel repeatedly to test the setting 7 3 Page 27 Fig 19 1 ...

Page 35: ... Pull out the shock absorber 54 NOTICE During mounting it is possible to damage the O rings 41 Mount the shock absorbers carefully 6 Insert the new shock absorbers CAUTION Note the shock ab sorber distance 8 4 2 Page 37 if need be insert or re move the fitting disks 7 Add fitting discs to the safety rings until they can be mounted without play ...

Page 36: ...e 37 0 1 20 2 MC 150 MH2 0 1 MC 150 MH2 8 4 2 Page 37 0 1 25 1 MC 150 MH2 0 1 25 2 WP M 0 25 456 9 2 0 05 MC 150 MH2 8 4 2 Page 37 0 1 35 1 MC 225 MH2 8 4 2 Page 37 0 1 35 2 MC 225 MH2 0 1 MC 225 MH2 8 4 2 Page 37 0 1 40 1 MC 600 MH 0 1 40 2 Mc 600 MH2 0 1 MC 600 MH2 8 4 2 Page 37 0 1 50 1 Mc 600 MH2 0 1 50 2 WP M 1 0 166 17 5 0 05 MC 600 MH2 8 4 2 Page 37 0 1 60 1 WP M 1 0 166 17 5 0 05 60 2 WP M...

Page 37: ...ber s plunger Fig 21 Shock absorber with shock absorber s plunger in pushed in position 2 Measure the overhang y of the shock absorber s plunger in pushed in position Fig 22 Shock absorber 3 Calculate the stroke of the shock absorber h h x y 0 2 mm 4 Adjust the overhang h of the shock absorber 8 4 2 Installation is done as follows ...

Page 38: ...and check for damage or wearing parts Replace all wear parts seals Treat all lubrication points with lubricant Oil and grease bright external steel parts Assembly takes place in the opposite order to disassembly Observe the following Do not damage the O rings 41 during assembly Unless otherwise specified secure all screws and nuts with Loc tite no 243 and tighten with the appropriate tightening to...

Page 39: ...ly drawings 12 03 SRU 20 60 en 39 Assembly drawings Fig 23 Stop side locked centre position version VM Fig 24 Stop side adjustability of final position 90 Fig 25 Stop side adjustability of final position 3 9 ...

Page 40: ...Assembly drawings 40 12 03 SRU 20 60 en Fig 26 Basic components and media feed through ...

Page 41: ...Assembly drawings 12 03 SRU 20 60 en 41 Fig 27 Attachment locked centre position version VM Fig 28 Piston and cover basic unit Fig 29 Attachment centre position version M ...

Page 42: ...600 0371009 0371013 0371017 0371021 with locked center position 0371002 0371006 5518601 0371010 0371014 0371018 0371022 with media feed through 0371003 0371007 5518599 0371011 0371015 0371019 0371023 with center position and media feed through 5517804 5517805 5517806 5517807 5517808 5517809 5517810 with locked center position and media feed through 5517811 5517812 5517813 5517814 5517815 5517816 5...

Page 43: ... feed through 5514982 5518654 5514990 5514994 5514998 5515002 with center position 5516590 5518657 5516594 5516596 5516598 5516600 with locked center position 5514983 5518655 5514991 5514995 5514999 5515003 with media feed through and center position 5516591 5518658 5516595 5516597 5516599 5516601 with media feed through and locked center position 5514984 5518656 5514992 5514996 5515000 5515004 Co...

Page 44: ...9939230 76 O ring DIN 3771 NBR 70 6 x 1 0 2 x 9611063 102 O ring DIN 3771 NBR 70 5 x 1 5 2 x 9611131 12 x 1 5 2 x 9611159 13 x 1 5 2 x 9611061 41 O ring DIN 3771 NBR 70 27 x 1 5 4 x 9939230 35 x 1 5 4 x 9942127 41 x 1 5 4 x 9611052 45 x 1 5 4 x 9611052 50 x 1 5 4 x 9611118 60 x 1 5 4 x 9935467 74 x 1 5 4 x 9611117 42 O ring DIN 3771 NBR 70 6 x 1 0 2x 9611063 10 x 1 0 2x 9611044 41 O ring DIN 3771 ...

Page 45: ...3 5 x 1 8 x 9611300 3 5 x 1 8 x 9941343 Shock absorber Item Designation SRU 20 SRU 25 SRU 30 SRU 35 SRU 40 SRU 50 SRU 60 Size designation Quantity x Id No 54 Shock absorber pressure appl to 1 port 2 x 9941662 2 x 9951813 2 x 9949532 2 x 9941268 2 x 9941268 2 x 9941268 54 Shock absorber pressure appl to 2 ports 2 x 9941662 2 x 9941661 2 x 9951813 2 x 9949532 2 x 9941268 2 x 9941268 2 x 9941634 54 S...

Page 46: ...S568A NBR 70 18 77 x 1 78 2 x 9610125 21 89 x 2 62 2 x 9936629 28 74 x 2 62 2 x 9610025 31 42 x 2 62 2 x 9610026 36 17 x 2 62 2 x 9620100 47 29 x 2 62 2 x 9610226 56 82 x 2 62 2 x 9610252 45 Quad ring AS568A NBR 70 10 82 x 1 78 2 x 9610066 15 54 x 2 62 2 x 9938983 18 72 x 2 62 2 x 9610020 21 89 x 2 62 2 x 9936629 26 17 x 2 62 2 x 9610024 34 59 x 2 62 2 x 9610122 42 52 x 2 62 2 x 9935309 47 Seal GM...

Page 47: ...ation Pneumatic Swivel Unit SRU 20 60 pneumatic ID number 0357300 0354840 The incomplete machine may not be put into operation until conformity of the machine into which the incomplete machine is to be installed with the provisions of the Machinery Directive 2006 42 EC is confirmed Applied harmonized standards especially EN ISO 12100 2011 03 Safety of machinery General principles for design Risk a...

Page 48: ...48 12 03 SRU 20 60 en ...

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