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इंटरनेट मानक Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. “जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ” Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru “The Right to Information, The Right to Live” “Step Out From the Old to the New” IS 8534-5 (2005): Mine tub couplings and drawbars, Part 5: Drawbars [MED 8: Mining Techniques and Equipment] “!ान $ एक न’ भारत का +नम-ण” Satyanarayan Gangaram Pitroda ““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee”” “!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै” Bhartṛhari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS 8534 (Part 5) :2005 mm a-17wj=Fm?Rw*cll*lq Indian Standard MINE TUB COUPLINGS AND DRAWBARS PART 5 DRAWBARS (First Revision) Ics 73.100.10 Q BIS2005 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 110002 March 2005 Price Group 3 Mining Techniques and Equipment Sectional Committee, ME 08 FOREWORD This Indian Standard (Part 5) (First Revision) was adopted by the Bureau of Indian Standards, after the draft finalized by the Mining Techniques and Equipment Sectional Committee had been approved by the Mechanical Engineering Division Council. This standard on mine tub couplings and drawbars is one of a series of standards on mine tub couplings and drawbars. Other parts inthis series are: (Part 1): 2005 General requirements (second revision) (Part 2): 1994 C-link and D-shackle type couplings (fwst revision) (Part 3): 1994 R-shackle and link type couplings (first revision) (Part 4): 1994 F-shackle and link type @st revision) (Part 6): 1994 Hook and D-shackle type This standard on drawbars hasbeen published asaseparate standard to overcome difficulties experienced inthe use of drawbars specified in IS4001 : 1976 ‘Mine tubs (first revision)’. Itwas felt that the design specified in IS 4001 : 1976 does not ensure straight pull through drawbar. In addition, use of couplings specified in other parts of this standard will require either additional attachments on mine tubs or alternate design of drawbars haveto beused. This standard, therefore, specifiesdifferent types ofdrawbars which canbeused with couplings specified inother parts of this standard. Accordingly the requirements ofthe drawbars have been deleted from IS4001 :1995. The composition of the Committee responsible for the formulation of this standard isgiven in Annex A. For the purpose of deciding whether aparticular requirement of this standard iscomplied with the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS2:1960 ‘Rules for rounding offnumerical values (revised)’. The number ofsignificant places retained inthe rounded off value should be the same asthat of the specified value inthis standard. IS 8534 (Part 5) :2005 Indian Standard MINE TUB COUPLINGS AND DRAWBARS PART 5 DRAWBARS (First Revision) 1SCOPE 5 DESIGNATION This standard (Part 5) specifies the requirements for A mine tub drawbar of Type A conforming to this drawbars fitted to the chassis of mine tubs and used ‘ standard shall be designated as: for connecting mine tubs through couplings in a set Mine tub drawbar, Type A, IS 8534 (Part 5). of tubs and having amaximum safe working load of 50kN. 6 GENERAL REQUIREMENTS 2 REFERENCES 6.1 Drawbars conforming to this standard shall The following standards contain provisions, which comply with all requirements laid down in IS 8534 through reference inthis text constitute provisions of (Part 1). In addition, the drawbars shall also conform this standard. At the time ofpublication, the editions to the requirements specified in 6.2 to 6.7. indicated were valid. All standards are subject to 6.2 All holes in drawbars shall be made by drilling revision, and parties to agreements based on this and not by punching. standard are encouraged to investigate the possibility of applying the most recent editions of the standards 6.3 The drawbars shall be mounted on mine tub indicated below: chassis below the mine tub body (see IS 4001) by riveting. IS No. Title IS 549: 2005/ Split pins — Specification 6.4 The ends and the lengths of the drawbars shall 1S0 1234:1997 (third revision) be such that there is no fouling when tubs are buffered together and there is no locking of tubs on 4001:1995 Mine tubs — Specification Cuwes. (second revision) 8534 (Part 1): Mine tub couplings and 6.5 In drawbars of Type A, the lapped portion shall 2005 drawbars: Part 1 General berivetedandsideweldedonbothsides.Afterriveting, requirements (s e cond revision) the gap between lapped flat faces shall not exceed 0.25 mm. 3 TYPES 6.6 IndrawbarsofTypeB,theendsshallbereinforced Drawbars of mine tubs shall be of following types: bywelding ashort piece ofplate ofthickness equal to a) Type A – Lapped type, and the drawbar thickness. b) Type B – Flat type. 6.7 After riveting, eachrivet shallbechecked bytight 4 DIMENSIONS hammering and in case of any vibration due to slackness; the rivet shall be cut and redone. 4.0 Dimensions of drawbars shall be asgiven in4.1 and 4.2. 7 MARKING 4.1 Lapped Type Drawbar 7.1 Eachcoupling anddrawbar shallpermanently and legibly be marked on anon-vital component with the The dimensions of lapped type drawbars shall be as following information: given inFig. 1.Thedimensions ofendfitting oflapped ., typedrawbars shallbeasgiveninFig.2.Theassembly a) Manufacturer’s identification mark; of lapped type drawbar end with end fitting is given b) Safe working load, inkN; inFig. 3. c) Type of heat treatment given; and 4.2 Flat Type Drawbar d) Identification markbearing withmanufacturer’s The dimensions of drawbar (to be used directly with certificate of test and examination [see tub coupling) shall be as given in Fig. 4. Annex A of IS 8534 (Part l)]. 1 IS 8534(Part 5):2005 7.1.1 Thestamps used formarking shallbeof5mm 7.2.1 Theuseofthe Standard Mark isgoverned bythe size. Care shall betaken that the indentation isneither provisions oftheBureau ofIndian StandardrAct, 1986 too sham. nor excessive in de~th. and the Rules and Regulations made thereunder. The details ofconditions u~der which alicence for the use 7.2 BIS Certification Marking of Standard Mark may begranted tomanufacturers or The drawbars may also be marked with the Standard producers may beob~aine~from the Bureau of Indian Mark. Standards. 2 Nos. 020 DRILLED HOLE FOR 3%0s. 030 DRILLED HOLE FOR RIVETS ON TUB CROSS CHANNEL RIVET ON TUB BOITOM PLATE AT BOTH ENDS I l!) Ill II l-- —.. - + + +++{. ] . “,ti 1,1 4 +/ + 75 I 1570 ‘L L WELDING AT CONTACT Alldimensionsinmiliimetres. FIG.1 LAPPSDTYPEDRAWaAR IS 8534(Part 5):2005 HOLETOBEDRILLED IN ASSEMB YFORSpL TP(N .3x70A; PER IS549’ON ALLSIX FACES M36 \i- I NUT i 34 I1ll 1 II 0 : : 1 1, ! 9 ) I i i I - 080 4 78? 2 -+–-—-—-– 196 I I 162 I t 1’ 1 1 R~/ L. 140225 . + R40 I 1 m 078 —.— ---- 50 4. f I I.-=-J a) D-SHACKLE b) D-SHACKLE PIN OF Alldimensionsinmillimetres. FIG.2 ENDFITHNGFORLAPPEDTYPEDRAWBAR 3 IS 8534 (Part 5) :2005 %3 :: f@-- > I I I I -i, l—-—-—- 1 I I I /~ WELDINGAT CONTACTSURFACE I I 11 I J Alldimensicmsinmillimetres. FIG.3 LAPPEDTYPEDRAWSAERNDwrm ENDFmG IS 8534(Part 5):2005 2Nos.020 DRILLED HOLE 3NOS. 030 DRILLED HOLE FOR RIVETS ONTUBCROSS FOR RIVET ON TUBBOITOM CHANNEL PLATE AT BOTH ENDS f-+-@ -+-+-+-- 75 - 47 d N9 N9 9.5 039M -- — 5~ N9 ENLARGED DETAIL OF BORE AT A Alldimensionsinmillimetres. FIG.4 FLATTYPEDRAWSAR 5