Disclosure to Promote the Right To Information

Transcription

1 इ टरन ट म नक 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. ज न1 क अ+धक र, ज 1 क अ+धक र Mazdoor Kisan Shakti Sangathan The Right to Information, The Right to Live पर 1 क छ ड न' 5 तरफ Jawaharlal Nehru Step Out From the Old to the New IS/ISO (27): Recommendations for Tool Shanks 7/24 Taper for Automatic Tool Changers, Part 1: Dimensions and Designation of Shanks of Forms A, AD, AF, U, UD, and UF [PGD 32: Production and General Engineering]! न $ एक न' भ रत क +नम-ण Satyanarayan Gangaram Pitroda Invent a New India Using Knowledge! न एक ऐस खज न > ज कभ चर य नहB ज सकत ह ह Bhartṛhari Nītiśatakam Knowledge is such a treasure which cannot be stolen

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3 IS/ISO : 27 [Superseding IS (Part 1) : 1985] Hkkjrh; ekud Lopy Vwy psatjksa osq fy, 7@24 Vsij okys Vwy 'ksad Hkkx 1,],Mh],,iQ] ;w] ;wmh,oa ;w,iq çk:i osq 'ksadksa osq vk;ke,oa vfhkuke Indian Standard TOOL SHANKS WITH 7/24 TAPER FOR AUTOMATIC TOOL CHANGERS PART 1 DIMENSIONS AND DESIGNATION OF SHANKS OF FORMS A, AD, AF, U, UD AND UF ICS BIS 213 B U R E A U O F I N D I A N S T A N D A R D S MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG NEW DELHI 112 June 213 Price Group 4

4 Cutting Tools Sectional Committee, PGD 32 NATIONAL FOREWORD This Indian Standard (Part 1) which is identical with ISO : 27 Tool shanks with 7/24 taper for automatic tool changers Part 1: Dimensions and designation of shanks of forms A, AD, AF, U, UD and UF issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Cutting Tools Sectional Committee and approval of the Production and General Engineering Division Council. This standard was originally published as IS in 1985 in two parts as Recommendations for tool shanks 7/24 taper for numerically controlled machine tools with automatic tool changers (tool rotating type): Part 1 Tool shanks and Part 2 Retention knobs by deriving considerable assistance from ISO : 1983 and ISO : 1984 Tool shanks with 7/24 taper for automatic tool changers Part 1: Shanks of 4-45 and 5 dimensions and Part 2: Retention knobs for shank No. 4, 45 and 5 dimensions and mechanical characteristics. Now, the technical committee has considered adopting all the three parts of ISO 7388 in a single numbers as IS/ISO. Accordingly, both the parts of IS stand withdrawn. After the publication of this standard IS (Part 1) : 1985 Recomendations for tool shanks 7/24 taper for numerically controlled machine tools with automatic tool changers (tool rotating type): Part 1 Tool shanks shall be treated as withdrawn. This standard is published in three parts. Other parts in this series are: Part 2 Part 3 Dimensions and designation of shanks of forms J, JD and JF Retention knobs for shanks of forms AC, AD, AF, UC, UD, UF, JD and JF The text of ISO Standard has been approved as suitable for publication as an Indian Standard without deviations. Certain terminology and conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following: a) Wherever the words International Standard appear, referring to this standard, they should be read as Indian Standard. b) Comma (,) has been used as a decimal marker while in Indian Standards the current practice is to use a point (.) as the decimal marker. In this adopted standard, reference appears to certain International Standards for which Indian Standards also exist. The corresponding Indian Standards, which are to be substituted in their respective places are listed below along with their degree of equivalence for the editions indicated: International Standard Corresponding Indian Standard Degree of Equivalence ISO : 1989 General tolerances Part 1: Tolerances for linear and angular dimensions without individual tolerance indications ISO : 1989 General tolerances Part 2: Geometrical tolerances for features without individual tolerance indications ISO 815 : ) Technical drawings Fundamental tolerancing principle IS 212 (Part 1) : 1993 General tolerances: Part 1 Tolerances for linear and angular dimensions without individual tolerance indications (third revision) IS 212 (Part 2) : 1993 General tolerances: Part 2 Geometrical tolerances for features without individual tolerance indications IS 1216 : 1987 Technical drawings Fundamental tolerancing principle Identical do do 1) Since revised in 211. (Continued on third cover)

5 IS/ISO : 27 Indian Standard TOOL SHANKS WITH 7/24 TAPER FOR AUTOMATIC TOOL CHANGERS PART 1 DIMENSIONS AND DESIGNATION OF SHANKS OF FORMS A, AD, AF, U, UD AND UF 1 Scope This part of ISO 7388 specifies the dimensions of tool shanks with a 7/24 taper, of shank forms A, AD, AF, U, UD and UF (with two possible additions for each), for automatic tool changers, used on machines having an automatic gripping system for feeding tools from the magazine to the spindle and vice-versa. These tools are designed with the most important dimensions for use in spindle noses according to ISO Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO , General tolerances Part 1: Tolerances for linear and angular dimensions without individual tolerance indications ISO , General tolerances Part 2: Geometrical tolerances for features without individual tolerance indications ISO 815, Technical drawings Fundamental tolerancing principle 3 Dimensions 3.1 General All dimensions and tolerances are given in millimetres; tolerancing is according to ISO 815. Tolerances not specified shall be of tolerance class m in accordance with ISO and of class k in accordance with ISO Shank forms A and U See Figure 1 and Table 1. 1

6 IS/ISO : 27 Key 1 cutting edge 2 transition between taper and flange a b c Position of the cutting edge for right hand tools with single cutting edge. At the option of the manufacturer (radius or chamfer). At the manufacturer's discretion. d Scale: 2:1. e Not convex. f Depth.,4. Figure 1 Shank forms A and U 2

7 IS/ISO : 27 Dimension b,2 Table 1 Dimensions of shanks of forms A and U Shank number Form A U A U A U A U A U 16,1 19,3 25,7 d 1 a 31,75 44,45 57,15 69,85 17,95 d 2 H d , , , , ,95,15,15,15,15 d 3 tol. Max. Max. Max. Max. Max. d 4,5 44,3 39,15 56,25 75,25 91,25 147,7 132,8 d 5,1 5 46,5 63,55 82,55 97,5 98, ,75 d 6,5 59,3 54,85 72,3 91,35 17,25 18,25 164,75 149,5 d 7 6H M12 M16 M2 M24 M3 d 11 max. 14, , d 12 9,52 9,52 9,52 9,52 9,52 e min f b 15,9,3 j 15 18, l 1,3 47,8 68,4 82,7 11,75 161,9 l 2 min l 3 min. 33,5 42,5 52,5 61,5 76,5 l 4,15,15,15,15 5,5 8,2 1 11,5 14 l 5 16,3 22,7 29,1 35,5 54,5 l 5 tol.,3 l 6 18, ,3 37,7 59,3 56,8 l 6 tol.,3 l 7,5 1,6 2 r 1,6 1,2 2 2,5 3,5 r 1 tol.,3 r c 2,5,8 1 1,2 1,5 2 r 3,5 1,6 2 t 1,1,2,3 t 2,2,3,4 t 3,12,2 u,1 19,1 v,1 11,1 x,15 3,75 y,1 3,2 8 17'5" 4" tol. a d 1 : basic diameter enclosed in a gauge plane. b For information only. c Chamfer or radius type of counterbore entrance are possible and limited by diameter d 11.,5,4,4,15,15 3

8 IS/ISO : Shank forms AD and UD As a complement to Forms A and U, it is possible to add a through hole, e.g. for centric inner coolant supply, as indicated in Figure 2. Those forms are called AD (if provided on Form A) and UD (if provided with Form U). The condition is that d 1 shall be less or equal to the core diameter of the thread receiving the retention knob. Figure 2 Shank forms AD and UD 3.4 Shanks forms AF and UF As a complement to shank forms A and U, it is possible to add two holes at the back of the flange for inner coolant supply, the dimensions of which are indicated in Figure 3 and Table 2. Those forms are called AF (if provided with Form A) and UF (if provided with Form U). For Forms AF and UF, if an auxiliary connecting bore is needed, it shall be sealed to withstand an operating pressure of up to 5 MPa, of a design that is at the manufacturer's discretion. 4 Figure 3 Shank forms AF and UF

9 IS/ISO : 27 Table 2 Supplementary dimensions of shanks of forms AF and UF Shank no. d 9 max. e Shanks with data medium For the six forms specified in 3.2 to 3.4, a data medium can be added, the dimensions of which are indicated in Figure 4 and Table 3. a b Fitting position of the data medium: same position as the cutting edge for right-hand tools with a single cutting edge. Other diameters and depth according to the data medium used. Figure 4 Fitting position of data medium Table 3 Supplementary dimensions for fitting of data medium a c max,3 45 or r,3 a d 13 1,9 l 8 4,6,2 At the discretion of the manufacturer. 4 Information on material and heat treatment Tool shanks with a 7/24 taper should be heat treated with considerations for strength, hardness, case depth (if not through hardened). Toughness and wear requirements are to be taken into account. 5

10 IS/ISO : 27 5 Designation A tool shank with 7/24 taper in accordance with this part of ISO 7388 shall be designated as follows: a) Tool shank ; b) reference to this part of ISO 7388, i.e. ISO ; c) a dash; d) Form A, U, AD, UD, AF or UF; e) the size; f) in the case of a design with data medium, a dash and the letter D. EXAMPLE Designation of a tool shank with 7/24 in accordance with ISO , Form A, shank no. 4 with fitting position for a data medium D: Tool shank ISO A 4 D 6

11 IS/ISO : 27 Bibliography [1] ISO 927 1), 7/24 tapers for tool shanks for automatic changing Tapers for spindle noses 1) It is intended that at the next revision, shanks of forms U, UD, UF, J, JD and LF will also be covered. 7

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13 (Continued from second cover) 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, shall be rounded off in accordance with IS 2 : 196 Rules for rounding off numerical values (revised). The number of significant places retained in the rounded off value should be the same as that of the specified value in this standard.

14 Bureau of Indian Standards BIS is a statutory institution established under the Bureau of Indian 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 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 reaffirmed 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 from Doc No.: PGD 32 (1176). Amendments Issued Since Publication Amendment No. Date of Issue Text Affected Headquarters: BUREAU OF INDIAN STANDARDS Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 112 Telephones: , , Website: Regional Offices: Telephones Central : Manak Bhavan, 9 Bahadur Shah Zafar Marg NEW DELHI Eastern : 1/14, C.I.T. Scheme VII M, V.I.P. Road, Kankurgachi , KOLKATA , Northern : SCO , Sector 34-A, CHANDIGARH Southern : C.I.T. Campus, IV Cross Road, CHENNAI , , Western : Manakalaya, E9 MIDC, Marol, Andheri (East) , MUMBAI , Branches: AHMEDABAD. BANGALORE. BHOPAL. BHUBANESHWAR. COIMBATORE. DEHRADUN. FARIDABAD. GHAZIABAD. GUWAHATI. HYDERABAD. JAIPUR. KANPUR. LUCKNOW. NAGPUR. PARWANOO. PATNA. PUNE. RAJKOT. THIRUVANATHAPURAM. VISAKHAPATNAM. Published by BIS, New Delhi