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है”ह”ह

IS 5626 (1990): Chain conveyors - Connector units, shackletype [MED 6: Continuous Bulk Conveying, Elevating, HoistingAerial Ropeways and Related Equipment]

IS 5026 : 1990

Indian Standard

CHAINCONVEYORS-CONNECTORUNITS, -\ I SHACKLETYPE-SPECIFICATION d'

( First Revision )

UDC 621’867’1’055’7

:;

0 BIS 1990

BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

November 1990 Price Group 3

Conveyors, Vertical Hoists and Bucket Elevators Sectional Committee, HMD 06

FOREWORD

This Indian Standard ( First Revision ) was adopted by Bureau of Indian Standards on 9 March 1990, after the draft finalized by the Conveyors, Vertical Hoists and Bucket Elevators Sectional Committee, had been approved by the Heavy Mechanical Engineering Division Council.

IS 5626 was first published in 1970. This revision is based on the experience gained in the implementation of the standard and also consequent upon revision of relevant ISO/R 1082-1969 as IS0 1082-1984.

This Indian Standard is ndt intended to indicate a complete design, but it gives details to ensure dimensional compatibility with chains conforming to IS 3948 : 1986 ‘Indian Standard specification for calibrated high tensile steel ( round link ) chain ( electric butt welded ) for chain conveyors and coal ploughs used in mines ($rst revision )‘.

In the preparation of this Indian standard considerable assistance has been drawn from IS0 1082- 1984 ‘Mining-shackle type connector units for chain conveyors’, issued by International Organization for Standardization ( IS0 ).

IS 5626 : 1990

Indian Standard

CHAIN CONVEYORS-CONNECTOR UNITS, SHACKLE TYPE- SPECIFICATION

( First Revision ) 1 SCOPE

1.1 This Indian Standard covers the requirements for shackle type connector units for use with chain conveyors.

2 REFERENCES

IS No.

1367 (Part3) : 1979

1367 (Part6): 1980

1828 : 197.5

3948 : 1986

Title

Technical supply conditions for threaded steel fasteners : Part 3 Mechanical properties and test methods for bolts, screws and studs with full loadability ( second revision ) TechnIcal supply conditions for threaded steel fasteners : Part 6 Mechanical properties and test methods for nuts with specified proof loads ( second revision ) Method for load verification of tensile testing machines (.first revision ) Calibrated high tensile steel ( round link ) chain ( electric butt welded ) for chain con- veyors and coal plough used in mines (.fiW revision )

3 TERMINOLOGY

3.0 For the purpos: of this Indian Standard, the following terminology shall apply.

3.1 Size

The nominal size of the chain for which the con- nector is made.

3.2 Test Force

The specified force to which a sample finished connector unit shall be subjected without exceed- ing the stated percentage elongation in Table 3.

3.3 Breaking Force

The maximum force to which a sample finished connector unit withstands during the course of a tensile test to destruction.

3.4 Percentage Elongation

The extension expressed as a percentage of the outside length.

3.5 Processing

Any treatment of the connector units subsequent to forging; for example heat treatment, machining or surface treatment,

4 DIMENSIONS

4.1 Connector Units

Dimensions of connector units shall be as specifi- ed in Fig. 1 and Table 1. Dimensions not specifi- ed shall be chosen to ensure correct mating bet- ween the connector and the associated sprocket, scraper bar and conveyor pan.

4.2 Connector Bolts and Nuts

Dimensions of connector bolts and nuts shall be as given in Table 2.

5 MATERIAL

5.1 The steel used shall bc fully killed, of forgeable quality and of a type not liable to embrittlement, including strain age embrittlement.

5.2 Unless other wise specified m lnufasturer shall select the steel so that the finished connector, suitably heat treated, shall meet the mechanical properties specified in Table 3.

5.3 The connector bolts and nuts shall be manu- factured ~from steel having property class as mentioned in Table 2 and conforming to the re- quirements laid downin IS 1367 ( Part 3 ) : 1979.

6 GENERAL R%QUIREMENTS

6.1 All finished connectors shall be sound and free from cracks, surface flaws, laminations and other harmful defects. All flishes or fins pro- duced in manufacture shall be removed.

6.2 Unless otherwise agreed between purchaser and manufacturer, connectors shall be supplied unpolished and free from any coating except for coating for rust prevention.

7 SAMPLING

7.0 Unless otherwise specified by the purchaser, the following sampling shall apply.

7.1 The test samples shall be selected at random and they shall be in the same condition as the bulk of connectors.

I

IS 5626 : 1990

I I-_ REFEdENCE _-.I Fl

FACE

1) FULL ARTICULATION OF VERTICAL LINK WITHIN THIS ANGLE

T BAR LEG

I BAR LEG

.

NO-IX -The connector illustrated is a short connector.

FIG. 1 CONNECTOR UNT

7.2 Lot 8 TESTS

The connectors shall be divided into lots, a lot 8.1 Dimensional Tests comprising 500 connectors; any fraction shall be considered as a complete lot. The dimensions of connectors and components

shall be tested for conformity to dimensions laid 7.3 For dimensional tests, five COllnenCtOrS as down in 4.

sample shall be taken from each lot.

7.4 For static tensile test, one connector as g-2 Static Tensile Test sample shall be taken from each lot.

The connectors when tested in accordance with 7.5 For fatigue test, one connector as sample Annex A shall fulfil the requirements laid down shall be taken from each lot. in Table 3.

2

w

Table 1 Dimensions of Connectors

( Cluuse 4.1 and Fig. I )

All dimensions in millimctres.

Size and Pitch

of Chain

14x50

18x64

22x86

24x86

24x 87’5

26x92

Cw$le;tor Material Diameter

Length ’ Chain Centrc

to Outside to Hole .I’ld ‘ CIX ~trc 1 Hei- /Offset 1 I I

A B c D k ‘F

r;, G H J

Max Min Max Min Max +1 MUX + I 0 ----- --- -----

50 49 16 14 81 * 51 * + 24 17 Ml6

----- ---_--

64 63 20 18 103 l 5.5 * l 30 21 A420

----- -----

86’5 85 24 22 134 * 75 + * 37 25 M24

----p ---w-_-

86’5 85 26 24 138 l 78 39’5 25$ M24 l +

---_- -----

88 86’5 26 24 1395 * 78 * * 39.5 25 M24

---- - P-P---

93 91 28 26 / 148 * 85 * * 43 28 M27

Datum tion Inside Outside Long Short Legt

R S S, T U V VI W “2:

to.5 0 --z-5 -‘: +0’S , +2 MUX Max Max 0 -1’5 0 0 .~P----__-_-

8 32 16 14’5 11 18 - 18 -P---Y _I_-

10 43 21’5 18’5 14’5 21 41 23

.---_ - - Vactual - -

12 52 26 22’5 17 25 +2 45 -

--__--- --

13 52 26 24’5 17 26.5 45 24 - ------ -- --

13 52 26 24’5 17 26’5 45 -

.-------____

14 58 29 26’5 17’5 28’5 Vactual +3

45 _

*These dimensions are dependent on associated line pans.

+The purchaser may specify a combination of long and short lsgs at time of ordx.

*Hole tolerance to be agreed between the purchaser and the manufactdrer.

IS -5626 : 1990

Table 2 Dimensions and Mechanical Properties of the Connector Bolt and Nut

( Clauses 4.3, 5.3, A-l and A-I.1 )

All dimensions in millimetres.

Nominal Size Bolt Nut and Pitch ___..-.- ..--....- .--- ---- -----

of Chain Thread Length under PI&tin Thread

Size Head* L:ngrh Proa4”ftY

Size Pr;pasty Tightening

Torque Mitr

Min M&X hfitin A4in N.m -__

14x50 MIG 62 42 8’8 Ml6 8 180 -- --

18x64 M20 75 49 10’9 M20 10 400 -- -

22x86 M24 90 62 10’9 M24 10 500

24 \: 86 M24 95 62 10’9 M24 10 500 -_

24 x 87’5 M24 95 62 10’9 M24 10 500 -

26x92 M27 105 75 10’9 M27 10 700

*Based on ordinary hexagonal nut. If a torque Prevailing nut is used, the length shall be chos:n according to the type of nut used.

Table 3 Mechanical Properties of Shackle Type Connectors

( Clauses 5.2, 8.2, 8.3, A-3, A-4, A-5, B-l and B-2 )

Nominal Size andtPitch of Chain

14x50 180

18x64 300

22x86

24x86

24x 87’5

26 x92 575

Test Force

EN

415

490 --

490

All dimensions in millimetres.

Elongation at Test Force

Permanent Elongation

After Fracture

Settiug Force

Max 0’ /”

Mitt Mire kN % kN

I I I

2 225 8 8

---

2 370 8 13 -_.__

2 550 8 19 -- __._._ _

2 650 8 23

2 650 8 23

I I

I I 2

I 765

I 8

I 28

Fatigue Test

Force Levels -.-- .-___ Number

Loner I Upper of Cycles

kN

15

25

38

45

45

53

kN Min

77 40 000

127 40 000

190 40 000

--

22G 40 000

226 40 000

--_ ___-

265 40 000

8.3 Fatigue Test requirements laid down in this standard. If required, the cast number of the steel shall ~also

If agreed to between purchaser and manufacturer, be stated in the certificate of test and examination. the connectors shall be tested in accordance with The certificate of test and examination shall also Annex B for its conformity to requirements laid be supplied where connector units are supplied as down in Table 3. part of complete conveyor chain assembly.

9 CRITERIA FOR ACCEPTANCE 11 DESIGNATION

A connector lot shall be deemed to comply with this standard if each of the sample taken from the lot fulfils the specified requirements. If any sample fails in any of the test, two further samples shall be selected from the same lot. If both these additional samples meet al1 the specified requirements, the lot shall be deemed to comply with this standard. If any of the additional sample fail in any of the specified test, the con- nector lot shaJl be rejected.

10 CERTIFICATE OF TEST

A shackle type connector unit suitable for use with a chain of 14 x 50 size shall be designated as :

Shackle Connector Unit 14 x 50

I2 MARKING

All connectors shall be IegibIy marked indicating the source of manufacture and any other relevant information as agreed to between the purchaser and the manufacturer.

If required by purchaser, the manufacturer of 12.1 Certification Marking connector shall supply a certificate of test and examination with every lot of connector units Details of certification marking are availabIe with stating that the connector units conform to the Bureau of Indian Standards.

ANNEX A

( Clause 8.2 )

METHOD FOR STATIC TENSILE TEST

A-l TEST CONDITIONS

For the purpose of this standard, the connector shall be assembled with:

a> b)

Cl

A-l.1 The spacer shall have the same profile as . . . . _ _ ._ the scraper bar that is to be used with connector. With scraper bar in position the bolt/nut shall be tightened to the relevant value of torque given in Table 2.

A-2 TESTING MACHINE

The type and accuracy of testing machine shall be in accordance with class 1 of IS 1828 : 1975. The testing machine shall be used only within the appropriate range as shown by its test certificate.

A-3 ELONGATION AT TEST FORCE

The connector unit shall be subjected to a force

a suitable spacer,

a connector bolt and nut as described in Table 2, and two lengths of chain of the appropriate sire conforming to IS 3948 : 1986 of the same grade or better than the connector under test and to suit the requirements of testing machine. Alternatively special anchorages with dimensions corresponding to those of the appropriate size of chain may be used to anchor the connector in the testing machine.

equal to half of the test force stated in Table 3. The force shall than be reduced to the setting force stated in Table 3 and the outside length of the connector ( C in Table 1 ) measured. The force shall than be increased gradually at a rate of approximately 20 MPa/s ( 20 N/mmz/s ) to the test force specified in Table 3 and the outside length of connector again measured. The total elongation so determined shall not exceed the relevant percentage stated in Table 3.

A-4 BREAKING FORCE

After application of test force ( see A-3 ) the force shall then be increased further until the sample breaks. The ultimate breaking force determined by the test shall be not less than the value stated in Table 3. If during the test the sample does not reach the ultimate breaking force specified in Table 3 due to prior failure of bolt or nut, the test shall be discarded and shall be conducted again on another sample.

A-S PERMANENT ELONGATION AFTER FRACTURE

After conducting the breaking force test (see A-4) the broken parts of the connector shall be fitted together and the outside length of the connector ( C in Table 1 ) measured. The permanent elog- ation determined by the test shall be not less than the value specified in Table 3.

5

IS 5626 : 1990

ANNEX B ( Clause 8.3 )

METHOD FOR FATIGUE TEST

B-l DESCRIPTION AND CONDITIONS OF TEST

The test is conducted on a connector/chain assembly prepared under the conditions specified in A-l and A-1.1. The test consists of subjecting the connector assembly to repeated forces ( bet- ween a lower and an upper limit specified in Table 3 ) at a given frequency. The number of cycles sustained before the sample breaks con- stitutes the fatigue resistance ( or endurance ) of the sample.

B-2 TESTING MACHINE

The type and accuracy of testing machine shall be suitable for applying the forces specified in Table 3. The machine shall be calibrated stati- cally in accordance with class 1 of IS 1828 : 1975. Compensation for dynamic effects shall not be based on calculation but the actual forces on the test piece shall be checked occasionally by some

measuring device that can be mounted on machine in series with the sample.

B-3 FREQUENCY OF FORCE APPLtCATtON

The frequency of force application shall be not less than 200 cycles per minute and not more than I 000 cycles per minute. In case of any disagreement between purchaser and manufacturer on number of cycles per minute the test shall be carried out at 500 cycles per minute.

B-4 CRITERIA OF ACCEPTANCE

Sample when tested in accordance with B-l shall be deemed to be satisfactory if its fatigue resist- ance/endurance is not less than 40 000 cycles.

B-4.1 If the sample fails before 40 000 cycles, two further samples shall be subjected to this test and each one of them shall have an endurance of not less than 40 000 cycles for the i lot to be deemed to comply with this requirement.

Standard Mark

The use of the Standard Mark is governed by the provisions of the Bureau of Indian Standards Act, 1986 and the Rulcs~and Regulations made thereunder. The Standard Mark on products covered by an Indian Standard conveys the assurance that they have been produced to comply with the requirements of that standard under a well defined system of inspection, testing and quality control which is devised and supervised by BIS and operated by the producer. Standard marked products are also continuously checked by BIS for conformity to that standard as a further safeguard. Details of conditions under which a licence for the use of the Standard Mark may be granted to manufacturers or producers may be obtained from the Bureau of Indian Standards.

Bureau of Indian Standards

BIS is a statutory institution established under the Bureau of Indian Standards Act, I986 to promote harmonious development of the activities of standardization, marking and quality certification of goods and attending to connected matters in the country.

Copyright

BIS has the copyright of all its publications. No part of these publications may be reproduced in any form without the prior permission in writing of BIS. This does not preclude the free use, in the course of implementing the standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating to copyright Abe addressed to the Director ( Publications ), BIS.

Revision of Indian Standards

Indian Standards are reviewed periodically and revised, when necessary and amendments, if any, are issued from time to time. Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition. Comments on this Indian Standard may be sent to BIS giving the following reference:

Dot : No. HMD 06 (4271)

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

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