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Operating Manual
Tangential Rolling System T18F - T27F

41

www.lmt-fette.com

9 

Troubleshooting

Fault

Cause

Remedy

1 Pitch dia-

meter and/or 
major  dia meter 
of thread 
 incorrect

Distance between axes 
and/or blank diameter 
incorrect

Adjust blank diameter and/or distance 
between axes  
(see Chapter 5.1.5 and 5.2.1)

2 Thread not 

smooth, chips 
produced when 
rolling, cracks 
on workpiece, 
markings in 
threads of 
workpiece or 
splinters

Roll sets mixed up by 
mistake

Check markings on rolls, set number must 
be the same on all rolls 
(see Chapter 4.3.3)

Rolls assembled in-
correctly in rolling head

See Chapter 5.1.2

Thread starts of rolls 
incorrectly positioned to 
each other

Gears incorrectly assembled, check position 
of pinion tags (roll mount) with checking 
gauge (see Chapter 5.1.1)

Workpiece axis not 
parallel to roll axis

Align roll axes in parallel 
(see Chapter 8.2)

Centre height of roll unit 
incorrect

Adjust centre height, maximum vertical 
 tolerance max. ± 0.5 mm  
(see Chapter 6.3)

Stroke of cross slide 
turret incorrect  
(rolls engaged for too 
long or not enough)

Check feed movement of slide  
(see Chapter 6.3)

Thread rolls and gear-
train in rolling head jam

Gears or roll bearing dirty, compensat-
ing spring in dual gear may need to be 
 re-tensioned or replaced.

Rolls worn or broken

Install new rolls

Workpiece bends 
through during rolling 
operation

Support workpiece

Material already shows 
cracks prior to rolling

Not suitable for rolling

Material not suitable for 
cold forming

Change material, if possible

Axial washer worn

If possible, adjust axial clearance 
(see Chapter 5.1.3), 
otherwise replace axial washer (15)

3 Thread out of 

round 

Blank diameter out of 
round

Workpiece must be machined properly

Roll axis not parallel to 
workpiece axis

Establish parallelism 
(see Chapter 8.2)

Working stroke of cross 
slide per workpiece 
rotation too great

Check, correct if necessary 
(see Chapter 6.2)

LMT_Bedienungsanleitung_T18F_T27F_e.indd   41

02.08.11   17:40

Содержание FETTE T18F

Страница 1: ...www lmt fette com Operating Manual Tangential Rolling System T18F T27F LMT_Bedienungsanleitung_T18F_T27F_e indd 1 02 08 11 17 40...

Страница 2: ...buted or used for competition purposes without the prior written consent of the manufacturer 2011 Manufacturer The tangential rolling system specified on the title page is manufactured by LMT Fette We...

Страница 3: ...ngs 19 5 1 2 Inserting the thread rolls 20 5 1 3 Adjusting the axial rolling clearance 21 5 1 4 Functional testing 22 5 1 5 Adjusting the distance between the axes 22 5 2 Installation on the machine t...

Страница 4: ...ting 41 10 Cleaning maintenance and servicing 44 10 1 Changing the thread rolls 44 10 2 Maintenance intervals 44 10 3 Wear parts 45 11 Putting out of operation disassembly and disposal 46 12 Technical...

Страница 5: ...ocessing machine is contained in the respective Operating Manual This Operating Manual is designed to help you avoid improper handling Personal safety can only be ensured if you strictly follow the in...

Страница 6: ...hazard source possible or likely consequences as well as measures to avoid the hazard DANGER This warning category indicates an imminent hazardous situation which if not avoided will result in seriou...

Страница 7: ...rs Make sure to observe the general legal and operational safety regulations pertaining to the use of a tangential rolling system the universally recognized technical rules to ensure safe and professi...

Страница 8: ...e is a risk of the tangential thread rolling head falling down and causing injury Wear safety shoes to prevent foot injuries CAUTION Risk of hand injury Personnel must take care when handling the pack...

Страница 9: ...e reported to the manufacturer immediately Storage CAUTION Risk of hand injury During storage there is a risk of injury from rough surfaces or sharp edges on transport cases cartons pallets and packag...

Страница 10: ...ng system is stored in areas in which it is exposed to the effects of weather or aggressive substances it must be checked for proper condition by a qualified person prior to initial operation Storage...

Страница 11: ...ece rotations and the rolling head is drawn back again from the workpiece Tangential thread rolling heads can be used on all machine tools which are provided with automatic feed motion The tangential...

Страница 12: ...ould not exceed approx 1000 N mm2 145 000 Pa If the material properties are close to the said limiting values the rollabil ity is dependent on the required volume of forming If the volume of forming i...

Страница 13: ...able The following is to be used L rollable thread length mm P thread pitch mm d major diameter of the thread mm All values are indicative and may vary in individual cases Table 2 Maximum rollable thr...

Страница 14: ...hread roll 1 must ideally be located at the dimension b P 2 P before the start of the thread see Figure 2 left If this dimension is not achieved it may result in a significant tool life reduction of t...

Страница 15: ...uipment The respective version is available in two sizes T18F and T27F It is recommended to use the largest suitable rolling head for the respective machine tool to ensure that the largest possible wo...

Страница 16: ...oulder diameter under the narrow short arm side of the rolling head DBR Max shoulder diameter under a recessed thread roll DBG Max shoulder diameter under the wide drive arm side of the rolling head A...

Страница 17: ...ns The rolling head holder mount has been adapted to the respective mounted tool holder of the machine e g T slot parallel shank prisma or square mount Figure 5 Different rolling head holder versions...

Страница 18: ...t of other thread toler ances are also possible 4 3 1 Tool life The tool life of the thread rolls is dependent on many factors This includes e g Material properties especially tensile strength and bre...

Страница 19: ...e number example T27 10 31 T27 10 12A T27 10 12B M AB Only possible when the thread size is identical 12 6 12 6 Code number example T27 10 12M6 T27 10 12A 6B If both thread lengths are identical then...

Страница 20: ...12MV ABV AB AVBV Only possible when the thread size is identical Only possible when the thread size is identical Only possible when the thread size is identical 10 12 a a 10 12 a a 10 12 a a Code numb...

Страница 21: ...to be set between the rolls see also Chapter 5 1 5 2 For setting the length of the transverse stroke via the setting dimension F The rolling head holder is mounted on the machine The setting gauge is...

Страница 22: ...Av For each thread size a roll set and a setting gauge are required The first two number groups of the code numbers of the thread roll and the setting gauge must match NOTICE It is a prerequisite that...

Страница 23: ...3 in the direction of the arrow Remove the rolls ET 18 if necessary The driving claws of the pinion ET 8 must be able to engage in the steel reference gage ET 36 see Figure 8 It may be necessary to a...

Страница 24: ...er 2 on the lower side see Figure 9 The thread rolls 8 are marked on the claw side with number 1 and 2 Roll number 1 has to be mounted in the hinge arm which is also marked with number 1 on the front...

Страница 25: ...otated Ensure that both numbers are facing towards the workpiece see Figure 9 ATTENTION To ensure a good frictional behavior between the roll and the carbide axis it is essential to apply a coat of mo...

Страница 26: ...ere the spring is extended in the equalizing gear When the turned roll is released it must rotate back automatically to the initial position 5 1 5 Adjusting the distance between the axes DKW ET 32 ET...

Страница 27: ...piece The blank diameter dA of the thread to be rolled is similar to the pitch diameter d2 dA d2 0 3 mm mm Upward or downward deviations may be necessary due to the flow behavior of the material or du...

Страница 28: ...o the holder Install the rolling head holder on the machine tool Insert the tangential rolling head into the rolling head holder To do this proceed as follows see also Figure 14 Loosen the set screws...

Страница 29: ...sure that the thread roll first touches the workpiece which has the arrow direction marked on the rolling head and which has the same rotational direction as the workpiece page 26 The pendulum cleara...

Страница 30: ...steel sheet design see Figure 16 the spring steel sheet ET 31 7 engages between the set screws ET 30 of the rolling head An angle of inclination is achieved by the set screws moving out of their symm...

Страница 31: ...w the instructions of the manufacturer as well as the machine manufacturer ATTENTION Make sure that the coolant is free of chips and particles to prevent any foreign substances from rolling into the t...

Страница 32: ...ofiles 15 30 m min is recommended The estimated value for the rolling speed v is used to calculate the RPM n of the drive spindle as follows n 1000 v ________ da 1 min The rotational direction rotatin...

Страница 33: ...14 22 0 551 0 866 20 25 16 21 5 0 630 0 846 22 30 22 31 0 866 1 220 25 30 1 1 1 5 0 04 0 06 10 l 0 394 18 20 14 l 0 551 20 23 10 16 0 394 0 630 20 25 14 22 0 551 0 866 23 26 16 21 5 0 630 0 846 25 30...

Страница 34: ...coordinate Ds with reference to the diameter in a CNC program of Ds 2 dA ___ 2 1 5 Av 2 dA ___ 2 As mm 2 From position 1 the head is moved in working feed see above s or f up to position 3 ATTENTION...

Страница 35: ...ell at the position The dwell time td is calculated as follows td 60 nd ______ n s 4 Move the rolling head rapidly back to position 1 This completes the rolling process Instructions for designing a co...

Страница 36: ...ced by the cross slide or the turret slide This is normally not a problem on cam controlled automatic lathes On hydraulic or electric controlled slides it is necessary to check the tangential force Th...

Страница 37: ...result of the time tv spent moving with working feed plus the dwell time td on the workpiece The times can be calculated on the basis of the spindle RPM n or the selected rolling speed v When the work...

Страница 38: ...30 until the setting gauge in this region fits exactly between the thread rolls DKW dA ET 18 1 2 3 L a H F 4 ET 30 ET 31 ET 32 Figure 20 Using the setting gauge for tapered threads 2 Adjusting the tr...

Страница 39: ...angential rolling head with a knurling design or modified from an existing tangential rolling head a To order a tangential rolling head with a knurling design use the following ID numbers Tangential r...

Страница 40: ...larger than the desired finished size Here the achievable surface quality and diameter tolerance is always dependent on the surface quality and diameter toler ance of pre machining For knurlings the n...

Страница 41: ...ime is greater to ensure that the press finished surface is formed better 7 3 Thread rolling on pipes The rolling of threads on seamless drawn pipes is dependent on the available pipe wall thickness I...

Страница 42: ...hardly visible This degree of forming is generally sufficient to produce a stable thread This is the desired degree of forming in most applications This provides enough safety to prevent over form ing...

Страница 43: ...ter 5 2 1 It may be necessary to slightly increase the distance between the axes b If the pitch diameter is correct after the distance between the axes has been adjusted but the major diameter is too...

Страница 44: ...ints to the marking 2 on the rolling head arm see Figure 23 left in the zero position To increase the workpiece pitch diameter on the narrow arm side turn the slot of both axes by the same amount agai...

Страница 45: ...ght of roll unit incorrect Adjust centre height maximum vertical tolerance max 0 5 mm see Chapter 6 3 Stroke of cross slide turret incorrect rolls engaged for too long or not enough Check feed movemen...

Страница 46: ...erance 0 5 mm l 0 02 inch Stroke of cross slide turret incorrect rolls engaged for too long or not enough Check feed movement of slide see Chapter 6 2 Rolled with overpressure Reduce blank diameter se...

Страница 47: ...ee Chapter 8 2 Workpiece bends through during rolling operation Support workpiece Non uniform bending apart of axes due to too strong rolling pressure Correct axis inclination see Chapter 8 2 9 Gear b...

Страница 48: ...ended daily Machine operator Remove the rolling head from the rolling head holder Ensure the rolling head and holder are free of chips clean if necessary Insert the rolling head back into the holder C...

Страница 49: ...ree months after a long period of non use To be performed by fitter or foreman only Visually inspect all parts for run in marks especially Axis ET 3 in the region of the carbide bushings Gears in the...

Страница 50: ...rdous types of residue such as oils and greases must be disposed of pursuant to regulations Improper disposal of the used materials can pose a threat to the environment All materials must be disposed...

Страница 51: ...3 l 1 2992 B5 24 4 l 0 9606 34 2 l 1 3464 B6 Min 25 4 l 1 36 2 l 1 4251 L1 Min max 30 1 37 8 l 1 185 1 4881 43 1 53 5 l 1 6968 2 1062 L2 14 l 0 5511 20 l 0 7874 L3 Min H1 Min max 40 5 61 l 1 5944 2 40...

Страница 52: ...and thread rolls please make sure to state the specified description and ID number 18 24 3 12 4 3 24 35 6 13 8 20 31 4 31 3 31 11 31 13 31 10 31 2 31 1 31 6 9 31 12 31 4 31 12 31 8 31 1 22 10 7 33 2 2...

Страница 53: ...42 25 2 Cap screw 2142013 2142021 26 2 Straight pin 2141245 2141258 27 1 Threaded pin 2148369 2142132 28 2 Threaded pin 2148366 2142172 30 2 Threaded pin 2173449 2173468 31 1 Rolling head holder compl...

Страница 54: ...ngineering When planning the manufacture of your threads and profiles and introducing modern and rational production processes you can rely on the know how of our technical field staff and the experti...

Страница 55: ...as regrinding and thermal treatment Engineering Training seminars Catalogs brochures and flyers Extensive guides are available to help you get an overview of our huge product range Tables and sets of...

Страница 56: ...heck the gear settings Chapter 5 1 1 3 Insert the thread rolls into the rolling head Chapter 5 1 2 Set the axis inclination to the 0 position 4 Adjust the axial rolling clearance Chapter 5 1 3 and per...

Страница 57: ...e AV Setting gauge Internet F gauge F Setting gauge Blank diameter dA d2 0 03 mm Chapter 5 2 1 Internal diameter di d3 0 1 mm Chapter 5 2 1 Chamfer angle Chapter 5 2 1 Rolling speed v Selection accord...

Страница 58: ...Operating Manual Tangential Rolling System T18F T27F 54 www lmt fette com Notes LMT_Bedienungsanleitung_T18F_T27F_e indd 54 02 08 11 17 40...

Страница 59: ...LMT_Bedienungsanleitung_T18F_T27F_e indd 55 02 08 11 17 40...

Страница 60: ...o T12F T18F E 0811 2 DM DH LMT Fette Werkzeugtechnik GmbH Co KG Grabauer Str 24 21493 Schwarzenbek Germany Phone 49 41 51 12 0 Fax 49 41 51 37 97 www lmt fette com Rolling Hotline 49 41 51 12 391 E Ma...

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