35t Heppenstall Slab Tong Manual

T-5768 SABIC - Hadeed page 1 of 11

Automatic Slab Tong swl 35t Class 6

for Middle Slab Yard Crane CB 450 CB1

Service and Maintenance Instructions

Brand Type Year Tong no. Our reference Your order Date of delivery

HEPPENSTALL Z1-407069

2009 2726

T-5768/09 4500722501

20th November 2009

Opening max. 1’850 mm Spread 4’000 mmOpening min. 950 mm weight 10’500 kgRange 900 mm

Customer: Crane Section Saudi Iron & Steel Co (Hadeed) PO Box : 10053 Jubail 31961 Kingdom of Saudi Arabia

Fax.Tel.

0096 633 571-709 0096 633 571 251

Cham 4. February 2010


Index Quality and CE Conformity Certificate ........................................................................................................3

Technical Description ...................................................................................................................................4 1 Introduction...............................................................................................................................................4 2 Material .....................................................................................................................................................4

2.1 Acceptance Testes ............................................................................................................................4 3 Suspension...............................................................................................................................................5 4 Safety Factor ............................................................................................................................................5 5 Special Specifications...............................................................................................................................5

5.1 The Manufacturing of Bushings .........................................................................................................5

Optional Accessories ....................................................................................................................................6 1 Equi Trak ..................................................................................................................................................6

Commissioning of an Automatic Slab Tong ...............................................................................................7 1 Mechanic ..................................................................................................................................................7 2 Fastening of the Lifting Equipment to the Crane Installation ....................................................................7 3 Control ......................................................................................................................................................7 4 Importante Note for Crane Operator.........................................................................................................7

Operation Instructions ..................................................................................................................................8 1 Slab Loading.............................................................................................................................................8 2 Slab Unloading .........................................................................................................................................8

Overload Test.................................................................................................................................................9 1 Preparations prior to Testing ....................................................................................................................9 2 Testing......................................................................................................................................................9 3 After the Test ............................................................................................................................................9

Maintenance Instructions ...........................................................................................................................10 1 Weekly Inspection ..................................................................................................................................10

1.1 Pivot Points......................................................................................................................................10 2 Monthly Inspection..................................................................................................................................10

2.1 Screws and nuts ..............................................................................................................................10 2.2 Shoes...............................................................................................................................................10

3 Annual Inspection ...................................................................................................................................10

Appendix • Assembly Drawings • Bill of Material • Recommended Spare Parts • Check List for Lifting Equipment • Test Certificate for Slab Tong • Operation of Automatic Mechanism ZSK-0345 • Detail of Automatic Mechanism ND-6575 • Shoe for hot slabs NC-8089-c • Gripping Shoe Drawing • Calculation Sheet • Certificates


Quality and CE Conformity Certificate Automatic Slab Tong

Capacity: 35tHeppenstall Class: 6Serie No.: 2726Year 2009Type: Z1-407069

This tong has only been made for transportation of Slabs. The maximum weight should not exceed the capacity mentioned below. The specific dimensions of the Slabs are:

Length of slab min. 4’500 mm max. 11’500 mmWidth of slab min. 850 mm max. 1’650 mmThickness of slab min. 220 mm max. 300 mmPile height max. 1 SlabWeight of slab max. 35’000 kgTemperature of slab max. 800 °C Excentricity slab handling

max. 0.5m

Slab taper per m slab max. 43.5mm/m

Heppenstall will refuse any kind of responsibility if other objects are transported by this tong. Heppenstall certifies that the above mentioned tong has been designed and calculated according NBN E52-002 for the capacity mentioned below. It corresponds in all relevant characteristics to the European Conformity Regulations CE. and the European directives CE N° 98/37. All materials used for the Tong's construction are flexible and of long lasting quality.

• Principal levers and tong structure constructed of St. 52-3 (DIN) mild steel or USS-T1 (ASTM) high tensile steel • Axes and Shafts 42CrMo4V (DIN) surface hardened • Bushings C45 (DIN) surface hardened

Heppenstall certifies that all welding joints have been completed by qualified welders and have been tested successfully under regular controlled conditions. All parts that are highly stressed in operation have been checked by

• Ultrasonic treatment • MAGNAFLUX or penetrating liquid fluid

and met all quality requirements. Heppenstall-Technology AG

Cham 4. February 2010 Urs Borter Technical Responsible


Technical Description Automatic Slab Tong

The Heppenstall Automatic Slab Tong incorporates many design features gained from the knowledge of designing and supplying steel handling equipment for the past 100 years. Heppenstall maintains an ongoing research and development program investigating new and better methods of handling steel coils and evaluating the use of the latest technology advancements in materials for the manufacture of material handling equipment.

1 Introduction This type of tong is made for lifting slabs in a horizontal position. The tongs are robustly engineered for heavy duty application to meet the severe demands of steel mills. The crane operator controls the lifting process of this tong by placing the tong above the center of the slabs (see drawing in Operation Istructions). The hook mechanism consists of a cast iron housing with a firm latch pin and it is engineered to mesh with a catch thus allowing the tong to open and close. Easily accessible grease nipples are provided for all bearings. The gripping pads or shoes can be easily removed when required for maintenance, repairing or replacing.

2 Material The main levers are manufactured of high tensile steel with the following mechanical characteristics: • Yield point 70 kg/mm2 min. • Tensile strength 80 - 95 kg/mm2 min. • Expansion using a 50 mm long test sample 18 % min. Throughout alternating stress tests we have found that the steel we use has proven itself to be of excellent quality and is extremely age resistant. Furthermore, using high tensile steel keeps the weight of the tong to a minimum. All pins, incl. the latch pin are manufactured of 42CrMo4-V, material no. 1.7225 (DIN), SAE 410. All welding is performed and metallurgical supervised by experienced welders. All welded parts are subsequently heat treated. The gripping shoes are made of Heppenstall alloyed hot work steel and can be easily exchanged during a maintenance check. Material specifications are noncommittal guidelines and therefore not binding. Design details may be changed without notification.

2.1 Acceptance Testes All components subjected to high stress are examined for possible surface cracks using the "MAGNAFLUX" method. To check for incitements we use ultrasonic test equipment. Chemical and mechanical test certificates may be provided on request - at extra charge.


3 Suspension The steel plate suspension is designed to fit a single crane hook. A different suspension may be provided upon special request. 4 Safety Factor HEPPENSTALL-EUROPE tongs are available in various industrial classes. The safety factors of these classes are determined according to our many years of experience in the field of industrial handling equipment. Regarding frequency of load and weight limit, our classification corresponds with approximately the following classes according to FEM (Fédération Européenne de la Manutention, Section I, Cranes and Heavy Duty Handling Equipment, 3rd edition 10.011987) respectively DIN 15018 (April edition 1974).

HEPPENSTALL-EUROPE Class 4 corresponds to FEM E4 - E5 HEPPENSTALL-EUROPE Class 5 corresponds to FEM E6 HEPPENSTALL-EUROPE Class 6 corresponds to FEM E7 - E8

5 Special Specifications 5.1 The Manufacturing of Bushings

5.1.1 Material Specification The selected material for HEPPENSTALL bushings correspond to DIN 1.7131 (16MnCr5) with the following composition: C 0,14 - 0,19 % Mn 1,1 - 1,4 % Si 0,17 - 0,37 % Cr 0,8 - 1,1 % P max. 0,035 S max. 0,035

5.1.2 Heat Treatment The material has been selected carefully for cementation heat treatment. This results in the following properties:

• The surface hardens to about 60HRC and to a depth of 0,5 mm. • The core maintains the material characteristics.

The pieces are dipped into a special cyanide salt solution. After several hours of being exposed to temperatures between 860°C - 900°C they are red-hot, and the hardening of the surface takes place through a chemical reaction. The bushings are resistant to the following temperatures: Ac1 = 740 °C Ac2 = 840 °C (Ms = 300 °C) For lubrication we recommend:

Molykote 321R


Optional Accessories 1 Equi Trak (Equalizing Lever)

All tongs fitted with 2 main bolts connected to the lower rail (outer turning point), instead of the central turning point, will be equipped with an equalizing lever. This configuration will ensure a well balanced closing of the main lever during the gripping motion.

2 outer turning points 1 central turning point

A balanced closing of the main lever or shoe can not be guaranteed without this equalizing lever. An uneven grip would be the result if the shoes are not on the same level (as shown in the drawing below). One side would grip more slabs then the other, and the tong would loose the load.


Commissioning of an Automatic Slab Tong

All operations may only be performed by qualified personnel.

1 Mechanic • All packaging material must be removed after transportation. Make sure that none of the

material could inhibit parts of the mechanical function. • Did all of the parts for the lifting equipment arrive or did some get lost during the transport? • Are all the guides clean and lubricated? • The gears oil level need to be checked and if necessary refilled. • Have all the axes and bolts been tightened? • All screws should be tightened according to the plan and service instructions. • Will the crane installation meet all the requirements of the lifting equipment?

2 Fastening of the Lifting Equipment to the Crane Installation • The connection of the lifting equipment to the crane should take place after it was first

assembled on the ground. • The crane hook will then be brought down to the level of the lifting equipment’s suspension. • Manually it will be put into the suspension. • Check whether the hook is securely fastened in the suspension and is of adequate size. • Check that the lock of the hook is fastened.

3 Control • The lifting equipment is being operated from the crane, on which the tong is attached. • The crane operator should be well acquainted with the operational procedures. • The safety of our products depends highly upon the surroundings that are provided for

them.

4 Importante Note for Crane Operator • To avoid any accidents, it is of utmost importance that the crane operator will handle the

equipment away from people. Provide designated restricted areas if possible. • No one is allowed under the crane while in operation. • People need to be warned ahead of time, when the crane will be moving over a work area

or over passage ways. • The crane operator must receive instructions from the ground personnel in case of a

blocked vision. • The crane operator is not allowed to leave the crane as long as the equipment is in

operation. • It is forbidden to turn a load while driving toward an obstacle. • It is prohibited to lower cargo or lifting equipment which is swinging. • The ground personnel must stay away from a swinging load.

After all the steps mentioned above have been successfully carried out,

the lifting equipment is ready to go into operation.


Operation Instructions

1 Slab Loading

The tong is at open position and is placed ~30cm directly over the load. Use reduced speed to lower tong onto the slab Aut. handling 1-5m/min Manual handling 1-3m/min

The crane operator needs to ease the cable of the crane. This will activate the coupling. The lifting process can begin.

During the lifting process, speed max. 5m/min, the main frame closes and the levers grip the load secure.

Due to a mechanical gripping force the load is held tightly until it is ready to be set down again.

Never lift a slab violently off the ground !

2 Slab Unloading Unloading the slab is simply the inverse from loading operation.


Overload Test Normally the static and dynamic overload test is carried out by the customer while the inspection of the respective country (e.g. TÜV) is in attendance.

1 Preparations prior to Testing • The surface of the slab must be clean. The slab itself parallel.

• The person in charge of the test should make sure that the tong is situated right above the load so that the gripping shoes have a simultaneous and even grip.

2 Testing • Lift the tong carefully with the maximum weight limit.

• Check for correct gripping and horizontal position prior to adding an additional weight for the static and dynamic test.

• The additional load must be added in such way that the tong will hang in a horizontal position during the entire testing period.

3 After the Test All screws must be checked and tightened since they may have become loose during the test. Tight screws acording to Maintenace Instructions, Monthly Ispection, Screws and Nuts.

HEPPENSTALL Will refuse any kind of liability should this overload test not have been carried out properly.


Maintenance Instructions Automatic Slab Tong

All maintenance and repairs may only be carried out by competent experts. The expert must write up a signed report of all the changes and of all the transportation activities.

1 Weekly Inspection 1.1 Pivot Points All pivot points are equipped with grease nipples and must be greased (1 - 2 times a week)

We recommend: MOLICOTE-BR-2 grease

2 Monthly Inspection 2.1 Screws and nuts All screws must be checked and tightened according the following values

Driving torque for screw 8.8 M16 234 Nm M30 1’567 Nm M20 456 Nm M33 2’132 Nm M24 787 Nm M36 2’739 Nm

2.2 Shoes Check tong shoes according check list.

3 Annual Inspection Following details have to be checked:

• Condition of steel construction • Condition of mechanical parts • Check regular maintenance

Account for:

• Lifting ability of the equipment • Keeping within max. loading capacity • Performance check of the equipment


Attention! All tongs handling high temperature products such as ingots, slabs etc. have to be checked periodically as to the deterioration of structural steel parts. The main levers are manufactured of high-strength fine grain structural steel AS USS-T1., Superelso etc. which up to 200°C is primarily a non-aging material. When the material approaches temperatures in the annealing range of 500°C a change in the physical characteristic may occur (lower impact value, expansion, contraction etc.)

Conclusions When a test reveals that the material of the levers or beams have become brittle, the tong has to be taken out of service. In such a case, we recommend that you contact our customer service department for a general overhaul. It may be possible, that by using a special heat treatment the material can be returned to it’s original physical conditions.

Please use only original HEPPENSTALL spare parts for all repairs.

Attention! IT IS FORBIDDEN TO MAKE ANY CHANGES ON THE LIFTING EQUIPMENT WITHOUT WRITTEN CONSENT OF THE MANUFACTURER. SUCH ACTION WOULD DEFINITELY JEOPARDIZE THE SAFETY OF THE INSTALLATION.

Item Description Qty. Material Weight Code/Norm Drawing No Remarks

T-5768/09 a

b c d Substitute for:

SL407069a T-5768 Slab tong 35t cl6 Saudi.doc

e f g h Replaces through:

SLAB TONG Cap: 35t Class: 6

drawn: examined: released:

11.6.2009 SK

L4-407069a Printed the 10 Feb. 10

Page 1 / 7

ASSEMBLY DRAWING 9948 Z1-407069a

1 UPPER BEAM 1 1595 W1-407990a

1.1 INP 400x4436 2 St37 820 DIN1025

1.2 Plate 25x300x542 8 St52-3 182 D4-407991

1.3 Plate 30x215x692 2 St52-3 70

1.4 Plate 40x522x610 6 St52-3 357 D3-407992

1.5 Plate 30x400x600 2 St52-3 96

1.6 Plate Ø120x15 8 St52-3 7

1.7 Plate ∅140x30 4 St52-3 10

1.8 Plate 15x214x244 4 St37 24

1.9 Plate 20x322x350 1 St52-3 17

1.10 Plate 20x70x367 4 St52-3 16 D3-403544

1.11 Plate 20x52x110 8 St52-3 7.2

1.12 Plate 20x52x100 8 St52-3 6.5

1.13 Plate 20x37x52 8 St52-3 2.4

2 LOWER BEAM 1 1 861 W1-407993

2.1 UNP300-3312 2 St37 306 DIN1026

2.2 Plate 30x475x1220 2 St52-3 120

2.3 Plate 30x200x280 4 St52-3 42

2.4 Plate 15x380x976 2 St37 87

2.5 Plate 15x280x776 2 St37 70

2.6 Plate 15x270x380 4 St37 48

2.7 Plate 15x150x320 2 St37 11

2.8 INP 400-692 2 St37 120 DIN1025

2.9 Plate 15x70x367 8 St37 23

2.10 Plate 20x155x692 2 St37 34

3 LOWER BEAM 2 1 425 W1-407994

3.1 UNP300-3312 2 St37 306 DIN1026

3.2 Plate Ø120x10 4 St52-3 3


T-5768/09 a






11.6.2009 SK


Page 2 / 7

3.3 Plate 20x200x280 4 St52-3 28

3.4 Plate 15x300x320 4 St37 45

3.5 Plate 15x300x320 2 St37 23

3.6 Plate 15x270x320 2 St37 20

4 SUPPORT 2 371 W2-407995

4.1 Plate 30x388x545 4 St52-3 177

4.2 Plate 30x254x545 2 St52-3 65

4.3 Plate 30x254x406 2 St52-3 49

4.4 Plate 30x254x170 2 St52-3 20

4.5 Plate 30x160x274 2 St52-3 22

4.6 Plate 20x158x254 6 St52-3 38

5 MAIN LEVER 4 2224 W1-404675

5.1 Plate 40x1089x2394 8 USS-T1 2128

5.2 Plate 76x150x200 4 St52-3 56

5.3 Plate 22x150x200 8 St52-3 32

5.4 Plate ∅200x10 8 St52-3 8

6 STRAP 4 505 W3-404676

6.1 Plate 30x200x1364 8 St52-3 439

6.2 Plate 15x180x600 4 St52-3 46

6.3 Plate ∅160x10 8 St52-3 8

6.4 Plate ∅180x10 8 St52-3 12

7 CLUTCH LEVER 1 186 W1-404679

7.1 Plate 30x382x1730 2 St52-3 147

7.2 Plate 15x166x1002 1 St52-3 20

7.3 Tube ∅108/∅68x166 2 St35 14

7.4 Tube ∅108/∅68x45 2 St35 4

7.5 Tube ∅108/∅68x10 2 St35 1

8 CATCH LEVER 1 181 W1-403534


T-5768/09 a






11.6.2009 SK


Page 3 / 7

8.1 Plate 30x320x1725 2 St52-3 124

8.2 Plate 15x250x615 1 St52-3 17

8.3 Plate 90x250x250 1 St52-3 30

8.4 Tube ∅108/∅68x250 1 St35 10

8.5 PIN ∅20n6x60 4 St DIN7

9 SHEAVE BLOCK-LEFT 1 592 W1-408008

9.1 Plate 20x1065x1220 1 St52-3 178 D2-408009

9.2 Plate 20x1065x1220 2 St52-3 342 D2-408010

9.3 Plate 10x169x1010 2 St52-3 27

9.4 Plate 10x169x803 2 St52-3 22

9.5 Plate Ø230x8 2 St52-3 3

9.6 Plate Ø130x15 4 St52-3 5

9.7 Plate Ø130x10 4 St52-3 3

9.8 Plate 20x120x180 4 St52-3 12

10 SHEAVE BLOCK-LEFT 1 592 W1-408011

10.1 Plate 20x1065x1220 1 St52-3 178 D2-408009

10.2 Plate 20x1065x1220 2 St52-3 342 D2-408010

10.3 Plate 10x169x1010 2 St52-3 27

10.4 Plate 10x169x803 2 St52-3 22

10.5 Plate Ø230x8 2 St52-3 3

10.6 Plate Ø130x15 4 St52-3 5

10.7 Plate Ø130x10 4 St52-3 3

10.8 Plate 20x120x180 4 St52-3 12

11 TABLE 2 448 W2-407996

11.1 Plate 40x440x1006 2 St52-3 278

11.2 Plate 30x205x736 4 St52-3 110

11.3 Plate 30x179x256 4 St52-3 25

11.4 Plate 30x130x148 4 St52-3 18

11.5 Plate 30x100x130 8 St52-3 17

12 STRAP 4 183 W4-404724

12.1 Plate 40x150x526 8 St52-3 164


T-5768/09 a






11.6.2009 SK


Page 4 / 7

12.2 Plate 20x100x180 4 St52-3 11

12.3 Plate ∅120x10 16 St52-3 8

13 STRAP 4 160 W3-404677

13.1 Plate 50x150x735 4 St52-3 152

13.2 Plate ∅120x20 4 St52-3 4

13.3 Plate ∅120x10 8 St52-3 4

14 PROTECTION 2 150 W2-407986

14.1 Plate 5x990x1750 2 St37 136

14.2 Plate 50x50x2-790 6 St37 14

15 LINK 2 67 W3-407985

15.1 Plate 30x120x465 4 St52-3 50

15.2 Plate 20x215x254 2 St52-3 17

16 FRAME 1 244 W1-408012

16.1 IPE 200-3542 2 St37 160

16.2 IPE 200-1014 3 St37 45

16.3 Plate 8x120x920 2 St37 23

16.4 Plate 8x120x150 8 St52-3 16

17 PLATE 15x42x130 2 USS-T1 1 D4-403614

18 PIN ∅110x542 2 42CrMo4V 80 D4-407997

19 SHEAVE PIN ∅150x257 4 42CrMo4V 142 D3-407998

21 PIN ∅80x460 2 42CrMo4V 36 D4-407999

22 PIN ∅80x324 4 42CrMo4V 51 D4-408000

23 PIN ∅65x466 1 42CrMo4V 12 D4-408001

24 PIN ∅65x464 1 42CrMo4V 12 D4-408002

25 PIN ∅65x394 1 42CrMo4V 10 D4-408003

26 PIN ∅65x344 8 42CrMo4V 72 D4-408004

27 PIN ∅65x292 2 42CrMo4V 15 D4-408005

28 PIN ∅65x240 4 42CrMo4V 25 D4-408006


T-5768/09 a






11.6.2009 SK


Page 5 / 7

29 PIN ∅55x292 2 42CrMo4V 10 D4-403556

30 PIN ∅55x298 8 42CrMo4V 39 D4-403557a

31 PIN ∅70x484 2 42CrMo4V 30 D4-407957

32 PIN ∅70x464 2 42CrMo4V 28 D4-407958

33 PIN ∅50x484 2 42CrMo4V 15 D4-407959

34 PIN ∅50x444 2 42CrMo4V 14 D4-407960

35 PIN Ø60x140 4 42CrMo4V 12 D4-407137

36 PIN ∅60x259 4 42CrMo4V 23 D4-408007

38 SUSPENSION PIN 4 55 W3-408013

38.1 Pin Ø80x435 4 42CrMo4V 52,5 262-293HB

38.2 Pin Ø16x384 4 St37 2,5

40 TUBE ∅85/∅56x76 8 St35 16 D4-402442

41 TUBE ∅89/∅66x75 4 St35 8 D4-403558

42 TUBE ∅108/∅81x12 4 St35 2 D4-403559

43 TUBE ∅108/∅81x76 4 St35 10 D4-403560

44 TUBE ∅200/∅111x24 2 St52-3 8 D4-403561

45 TUBE ∅70/∅56x12 4 St35 1 D4-402298

50 RING Ø170x10 8 St52-3 3 D4-407147

51 CLUTCH 1 140 L4-402996

52 SHOE 97x155x200, size 2A 4 6H55 56 NC-7267d

53 SCREW ∅55x203, size 2 4 42CrMo4V 11 ND-7269b

59 BUSHING ∅120/∅110x30 4 16MnCr5 2 ND-3195f


61 BUSHING ∅90/∅80x40 24+4 16MnCr5 12 ND-3195f






T-5768/09 a






11.6.2009 SK


Page 6 / 7







72 BUSHING ∅80/∅70x30 4+8 16MnCr5 3 ND-3195f

80 LOCKING RING ∅110 complete 4 22 ND-16133a





85 Locking plate 50/12x170 8 7 ND-7821a

86 Locking plate 40/10x100 20 6 ND-7821a

90 Washer M12 12 DIN434

91 Hexagonal screw M16x35 40 8.8 DIN933



97 Screw M8x20 4 8.8 DIN912

100 Nut M48, 0.5d 20 8 DIN439B

101 Nut M12 24 8 DIN934

102 Nut M30 4 8 DIN934

103 Nut M48 16 8 DIN934

105 Grease nipple M10x1 68 DIN71412A

„Cap.35’000kg“ 2 A=126 NA-5918d

"HHH" 4 X=34 ND-20013

NAME PLATE 1 ND-7761c


T-5768/09 a






11.6.2009 SK


Page 7 / 7

FRAME 1 ND-9138

LOCTITE type 262

Pos Spécification Pièce Matériel Poids Code/Norm No Plan Plan

T-4982/01 a

b c d Remplacé par

SL402996 Kupplung Grösse

600.DOC

e f g h Remplacé pour

Verrou Cap: Classe:

Dessiné Contrôlé Libéré

22.3.2001 SK

L4-402996 imprimé le 13.8.2008

Page 1 / 1

VERROU 140 Z2-402996

1 Carcasse de verrou 1 St52-3 98 D2-402997 2 Axe de verrou ø133x575 1 42CrMo4 37 D3-402998 3 Axe ø32x95 2 42CrMo4 1 ND-3316c 4 Plaque d’arrêt 5/20x45 2 St37 ND-3303a 5 Couvercle de verrou16x160x185 1 St52-3 4 N4-400588 6 Vis M10x20 4 12.9 DIN912 7 Graisseurs M10x1 1 8 Vis M8x20 4 12.9 DIN912 9 Ressort anneau B8 4 DIN127

LIFT-E.DOC

Control List for Lifting Equipment Lifting Equipment: Service:

Automatic Slab Tong Serial No.: 2726 Capacity: 35t Drawing No.: Z1- 407069

Tong: Heppenstall Technology AG Class: 6 Date: Condition:

Good Sufficient Change Notes: Controller’s

Signature:

ZSK0345.DOC

ZSK-0345

Operation of an Automatic Mechanism

1) Tong is opened and lowered to

pick up slab • Cam is holding tong in an open

position 2) Tong is situated upon slab.

Crane operator must lower hook sufficiently to release the automatic mechanism

• Cam rotates to allow tong to

close

3) As the hook is being raised,

the tong grips the slab for transfer

4) At destination, step n° 2 is repeated. Tong will remain open

• Cam rotates to keep tong in open position

ND-6575 Specification of Details to Heppenstall Mechanism.DOC

ND-6575

Specification of Details to Heppenstall Mechanism Bezeichnung der Details zu Heppenstall Kupplung Specifica dei dettagli del meccanismo Heppenstall

Spécification des détails du verrou Heppenstall

1. Mechanism casing 2. Latch pin 3. Cam pin 4. Retainig plate 5. Cover 6. Socket head cap screw 7. Grease fitting 8. Socket head cap screw 9. Spring washer 1. Kupplungsgehäuse 2. Kupplungsbolzen 3. Bolzen 4. Sicherungsblech 5. Kupplungsdeckel 6. Zylinderschraube 7. Schmiernippel 8. Zylinderschraube 9. Federring 1. Carcassa 2. Perno a chiavistello 3. Perno di guida 4. Piastrina di fermo 5. Copperchio 6. Vite a brugola 7. Ingrassatore 8. Vite a brugola 9. Anello a molla 1. Carcasse de verrou 2. Crochet 3. Broche 4. Plaque d'arrêt 5. Couvercle du verrou 6. Vis à tête cylindrique 7. Nipple de graissage 8. Vis à tête cylindrique 9. Rondelle ressort

Pos.60 (A-6900)

NC-8089 Shoe for hot Slabs.DOC NC-8089

Shoe for Hot Slabs Schuh für heisse Brammen Puntali per bramme calde

Mors pour brames chaudes

• The original width of a tooth is ~ 4 mm. Through wear and tear it should not exceed 6,5mm.

• Die Zahnbreite von ~ 4 mm darf durch Abnützung das Mass von 6,5mm nicht

überschreiten. • La larghezza di ~ 4 mm del dente, essendo consumato non deve diventare piu

grande di 6,5 mm • Le taillage d'origine donne un largeur de ~ 4 mm. A l'usure cette dimension ne

doit en aucun cas dépasser 6,5mm

T-5768 Saudi Iron and Steel Hadeed Calculations Sheet page 0 of 7



Calculation sheets



2009 2726

T-5768/09 4500722501

20th November 2009



Fax.Tel.

0096 633 571-709 0096 633 571 251

Cham 23. November 2009

Slab tong 35t, class 6, T-5768

Load of main levers by eccenric slab

P .35000 kg slab max weight

L J .4000 mm distance between jaws

e .500 mm max eccentricity of slab

V 1 ..

L J2

e

L JP g =V 1 2.145 105 N

V 2 ..

L J2

e

L JP g =V 2 1.287 105 N

T-5768 A. A. Al-Quaimi Trading Est.mcd SK: 13.11.1909 Page 1 of 7

P T .V 1 2 =P T 4.29 105 N Theoretical weight of max slab

Tong 1 .8300 kg Total weight of tongQ 1 .Tong 1 g =Q 1 8.14 104 N

Tong .6500 kg Activ weight of tongQ .Tong g =Q 6.374 104 N

x 1 .825.2 mm y 1 .875.5 mm

x 2 .1076.9 mm y 2 .338.1 mm

x 4 .114.6 mm y 4 .462.4 mm

L .1173 mm

α .acosx 2L

180π

=α 23.354

Force- max opening

F H

.x 2 .cot .α π

180y 2

P T Q

2.

P T2

x 1

y 1=F H 7.256 105 N


1. Main lever1.1 Point Ad A .90 mm hole in lever for bushing d AF .0 mm

d axe .80 mm diameter of pinh A .180 mm

b A1 .40 mm width of bushingb A .40 mm thickness of lever platez A 4 number of plates

F AP T Q

.2 sin .α π

180

=F A 6.216 105 N

Area pressure

p AF A

..b A1 d axe z A =p A 48.559 MPa

Shearing pin

S A.π d axe

2

4=S A 5.027 103 mm2

τF A.z A S A

=τ 30.914 MPa

Traction

σ τF A

..h A d A b A .d AF d A b A1 b A z A=σ τ 43.164 MPa

Form factor

=d Ah A

0.5 k t 2.1

Efect. tractionσ τ1

.σ τ k t =σ τ1 90.644 MPa <196 MPa(USS-T1,Class 6)


Bending pin

=F A 6.216 105 N

l A .47 mm

M f.F A l A4

=M f 7.303 103 .N m

W A.π d axe

3

32=W A 5.027 104 mm3

σ 2M fW A

=σ 2 145.295 MPa

Allowed stress of pin

=σ 22 .3 τ

2 0.5154.847 MPa <216 MPa(42CrMo4V,Class 6)

1.2 Point B

d B .120 mm hole in lever for bushingd Baxe .110 mm diameter of pinh B .400 mm

b B .40 mm thickness of lever plateb B1 .50 mm width of bushing d B1 .200 mm diameter of flangez B 4 number of plates

F B F H .P T Q

2cot .α π

180=F B 1.296 106 N

Area pressure

p BF B

..b B1 d Baxe z B=p B 58.921 MPa

Shearing pin

A B.π d B

2

4=A B 1.131 104 mm2

τF B.z B A B

=τ 28.654 MPa


Bending pin

=F B 1.296 106 N

l B .50 mm

M f.F B l B4

=M f 1.62 104 .N m

W B.π d Baxe

3

32=W B 1.307 105 mm3

σ 2M fW B

=σ 2 124.002 MPa

Allowed stress of pin

=σ 22 .3 τ

2 0.5133.565 MPa <216 MPa(42CrMo4V,Class 6)

Flexion- main lever

M fB .F H y 1 .P T2

x 1 =M fB 4.583 105 .N m

W B.b B h B

3 d B3

.6 h B

.b B1 b B d B13 d B

3

.6 d B1=W B 1.09 106 mm3

σ 1M fB

.z B W B=σ 1 105.095 MPa

Traction

σ τ

P T2

..z B b B h B d B=σ τ 4.788 MPa

τF H

..z B b B h B d B=τ 16.197 MPa

Allowed stress

=σ 1.1.25 σ τ

2 .3 τ2 0.5

114.569 MPa <196 MPa (USS-T1,Class 6)


1.3 Point Dh D .401 mm

b D .40 mm thickness of lever platez D 4 number of platesR D .200 mm

Modified Winckler theory for curved beam

ch D2

=c 0.201 m

R R Dh D2

=R 0.401 m

a ln

Rc

1

Rc

1=a 1.1

k f

2 .a Rc

1

..3 .R ac

2 Rc

1=k f 1.525 form factor

M fD .F H y 4 .P T2

x 4 =M fD 3.601 105 .N m

W D.b D h D

2

6=W D 1.072 106 mm3

σ 1

.M fD k f.z D W D

=σ 1 128.035 MPa

Traction

σ τ

P T2

..z D b D h D=σ τ 3.344 MPa

Shearing

τF H

..z D b D h D

=τ 11.31 MPaAllowed stress

=σ 1.1.25 σ τ

2 .3 τ2 0.5

133.658 MPa <196 MPa (USS-T1,Class 6)


2. Lower beam

l lb1 .1576 mm

l lb2 .550 mm

b lb1 .30 mm

h lb1 .300 mm

h lb2 .150 mm

M lb .Q4

l lb1 .Q4

l lb2 =M lb 3.388 104 .N m

W UNP300 ..535 103 mm3

W pl.b lb1 h lb1

2 h lb22

6=W pl 3.375 105 mm3

σ lbM lb

.2 W UNP300 W pl=σ lb 19.415 MPa <78.5 MPa(St37,Class 6)


T-5768 Saudi Iron and Steel Hadeed Certificates



Certificates



2009 2726

T-5768/09 4500722501

20th November 2009



Fax.Tel.

0096 633 571-709 0096 633 571 251

Cham 23. November 2009

35t Heppenstall Slab Tong Manual

Documents