Table Of Content

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 15744 (2007): Angular deflection for 'C' frame mechanical presses [PGD 4: Metal Forming Machines] “!ा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” Is15744:2007 W’vfhm lndian Standard ANGULAR DEFLECTION FOR ‘C’ FRAME MECHANICAL PRESSES — SPECIFICATION ICS 25.120.10 0 BIS 2007 BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARC NEW DE LHI 110002 Jl[ne 2007 Price Group 1 Metal Forming Machines Sectional Committee, PG 04 FOREWORD This Indian Standard was adopted by the Bureau of Indian Standards, after the draft finalized by the Metal Forming Machines Sectional Committee had been approved by the Production and General Engineering Division Council. This standard has been formulated based on the expertize available in the Indian Industry. In formulation of this standard, considerable assistance has been derived from various press manufacturers in the country. For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shal1be rounded off in accordance with IS 2:1960 ‘Rules for rounding off numerical values (revised)’. The number of significant places retained inthe rounded off value should be the same as that of the specified value in this standard. IS 15744:2007 Indian Standard ANGULAR DEFLECTION FOR ‘C’ FRAME MECHANICAL PRESSES — SPECIFICATION 1 SCOPE S METHOD OFDEFLECTION MEASUREMENT 1.1 This standard describes the method of angu{ar 5.1 Before conducting deflection tests. ensure that; defleetion of ‘C’ frame mechanical presses. a) geometrical tests are conducted and completed us per 1S4592, 1.2 This standard specifies the standard permissible deflection of ‘C’ frame mechanical presses. b) test blocks are of same height (alike within + 0.03 mm), and 1.3 This standard does not cover the special purpose c) testblocksaresymmetrically.placed aboutthe presses such as horizontal presses, presses without slide centrelirteofpress sothat load eentre and press guides and forging presses. ccmtreare same (within* 0.5 percent of longer 2 REFERENCES dimension of bolster). 5.2 Set the slide at appropriate position (very near to The following standards contain provisions, which bottom of stroke in case of mechanical presses). through reference in this text, constitute provisions of this standard. At the time of publication, the editions 5.2.1 Arrange suitable means (hydmulicjacks)to apply indicated were valid. All standards are subject to force on 2/3 of left to right dimension and full front to revision and parties to agreements based on this back of bolster. standard we encouraged to investigate the possibility 5.2.2 Set the dial gauges d,, dz and straight edge on of applying the most recent editions of the standards suitable blocks of equal height as shown in Fig. 1, indicated below: 5.3 Apply 2to3percent of press force toensure closing [.sA’(,. Tit[c’ ofclem-antes in the drive system. 209: : 19s3 Spcci(ication for plunger type dial 5,4 Set the dial gauges at zero and apply full press gauges (firsretvision) load through hydraulic jacks. Note the readings of dial 4592:2002 Acceptance condition of open front gauges under full load condition. mechanical power presses — Testing 5.5 For angular deflection measurement in ‘C’ frame of the accuracy Qirsl revi.sio12) mechanical presses set the dial gauge as per Fig. 1. 6652 Glossary of terms relating to metal 5.6 Calculate angular deflection, cxfrom the formula forming machines and tools: given below: (Part 1):1986 Metal forming tools (first,revisiotf) () ~ = tan-l 4 –~z (Pm-t2) :1986 Metal forming machines relating to L–2L, sheet metal (firs~revisio??] where (Part 3) :1986 Metal forming technology and dl, d2= readings of dial gauges, in mm; operations relating to sheet metal (Jrst re}i,siort) L = front to back dimensions of bolster, in mm; and 11498:1985 Specification forlevertypedialgauges L, = distance of dial gauge from the edge of the 3 TERMINOLOGY bolster. The value will be determined from the table given below: For the purpose of this standard, the definitions given in IS 6652 (Parts 1,2 and 3) shall apply. L<1 ()()0mm 1000<Ls L>2000mm 2000 mm I 1 1 4 MEASURING INSTRUMENTS I L, ().1 XL 100 mm I50 mm The measuring instruments shall be dial gauges with Figure, 1isside view of the press. magnetic base 01”least count of 0.0 I mm or better and straight edge. These instruments shall conform to 5.7 Permissible angular deflection, u in ‘C’ frame ]S ~~92 or IS I1498 mechanical presses shall be u S 0G5’. I I Lt I I FIG. 1 ‘C’ FRAMEMECHANICALPRESS 2 GMGIPN—126 BIS/ND/07—300 _—— —_—_________...__ . . __,_ !!J! Bureau of Indian Standards BIS is a statutory institution established under the Bureau of lndian Standards Act, 1986 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 be addressed to the Director (Publications), BIS. Review of Indian Standards Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed periodically; a standard along with amendments is reai%rmed when such review indicates that no changes are needed; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of ‘BIS Catalogue’ and ‘Standards :Monthly Additions’. This Indian Standard has been developed frotn Doc :No. PC 04 (1009). Amendments Issued Since Publication Amend No. Date of Issue Text Affected BUREAU OF INDIAN STANDARDS Headquarters : Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002 Telegrams :Manaksanstha Telephones: 23230131,23233375,2323 9402 (Common to all offices) Regional OffIces : Telephone Central : Manak Bhavan, 9 Bahadur Shah Zafar Marg 23237617 NEW DELHI 110002 { 23233841 Eastern : 1/14 C.I.T. Scheme VII M, V.I. P.Road, Kankurgachi .“ 23378499,23378561 KOLKATA 700054 { 23378626,23379120 Northern : SCO 335-336, Sector 34-A, CHANDIGARH 160022 2603843 { 2609285 Southern : C.I.T. Campus, IV Cross Road, CHENNAI 600113 22541216,22541442 { 22542519, ‘2254 2315 Western : Manakalaya, E9 MIDC, Marol, Andheri (East) 28329295,28327858 MUMBAI 400093 { 28327891,28327892 Branches : AHMEDABAD. BANGALORE, BHOPAL. BHUBANESHWAR. COIMBATORE. FARIDABAD. GHAZIABAD. GUWAHATI. HYDERABAD. JAIPUR. KANPUR. LUCKNOW. NAGPUR. PARWANOO. PATNA. PUNE. RAJKOT. THIRUVANANTHAPURAM. VISAKHAPATNAM. PRINTED BY THE GENI?RALMANAGEli GOVERNMENT OF INDIA PRESS, NASHIK