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1、 Reference number ISO 3442-3:2007(E) ISO 2007 INTERNATIONAL STANDARD ISO 3442-3 First edition 2007-02-01 Machine tools Dimensions and geometric tests for self-centring chucks with two-piece jaws Part 3: Power-operated chucks with serrated jaws Machines-outils Dimensions et essais gomtriques pour man
2、drins serrage concentrique et mors rapports Partie 3: Mandrins commande axiale assiste avec mors assemblage par dentelure Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 01:53:32
3、 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3442-3:2007(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded ar
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6、ating to it is found, please inform the Central Secretariat at the address given below. ISO 2007 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, wit
7、hout permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2007 All ri
8、ghts reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 01:53:32 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3442-3:2007(E) ISO 2007 All r
9、ights reserved iii Contents Page Foreword iv 1 Scope . 1 2 Normative references. 1 3 Preliminary remarks . 1 3.1 Measuring units 1 3.2 Geometric tests. 1 3.3 Tests to be performed 1 4 Precision classes 1 5 Sizes for interchangeability. 2 5.1 90 serrations Dimensions 2 5.2 90 serrations Permissible c
10、umulative pitch deviation 2 5.3 60 serrations Dimensions 3 5.4 60 serrations Permissible cumulative pitch deviation 3 5.5 Jaw nuts Dimensions 4 6 Geometric tests. 5 6.1 Test mandrels 5 6.2 Spindle or face plate accuracy 5 6.3 Chuck body accuracy. 5 6.4 Test with test top jaws (hard jaws) . 5 6.5 Tes
11、ts with machined top jaws. 6 6.6 Tests off-the-spindle. 6 6.7 Chuck accuracy 9 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 01:53:32 MDTNo reproduction or networking permitted
12、 without license from IHS -,-,- ISO 3442-3:2007(E) iv ISO 2007 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out throu
13、gh ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collabora
14、tes closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standar
15、ds. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of th
16、is document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 3442-3 was prepared by Technical Committee ISO/TC 39, Machine tools, Subcommittee SC 8, Work holding spindles and chucks. This first edition of ISO 3442-3, together w
17、ith ISO 3442-1 and ISO 3442-2, cancels and replaces ISO 3442:1991 and ISO 9401:1991. ISO/TC 39/SC 8 decided to divide ISO 3442:1991 into three parts and to combine them with ISO 9401:1991. When all three parts of ISO 3442 are published, ISO 3442:1991 and ISO 9401:1991 will be withdrawn. ISO 3442 con
18、sists of the following parts, under the general title Machine tools Dimensions and geometric tests for self-centring chucks with two-piece jaws: Part 1: Manually operated chucks with tongue and groove type jaws Part 2: Power-operated chucks with tongue and groove type jaws Part 3: Power-operated chu
19、cks with serrated jaws Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 01:53:32 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD I
20、SO 3442-3:2007(E) ISO 2007 All rights reserved 1 Machine tools Dimensions and geometric tests for self- centring chucks with two-piece jaws Part 3: Power-operated chucks with serrated jaws 1 Scope This part of ISO 3442 specifies 90 and 60 serrations and jaw nuts applicable to 90 and 60 serrations fo
21、r mounting the top jaws on the base jaws of power chucks, in order to ensure interchangeability. It also describes, with reference to ISO 230-1, the geometric tests for self-centring, power-operated chucks with two or more two-piece jaws (serrated type), and the corresponding tolerances which apply.
22、 2 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 230-1:1996, Test code
23、 for machine tools Part 1: Geometric accuracy of machines operating under no- load or finishing conditions ISO 965-3, ISO general purpose metric screw threads Tolerances Part 3: Deviations for constructional screw threads 3 Preliminary remarks 3.1 Measuring units All dimensions and tolerances in thi
24、s part of ISO 3442 are expressed in millimetres. 3.2 Geometric tests This part of ISO 3442 deals only with the inspection of rotational accuracy of the chuck, the straightening and the centring of workpieces. It does not apply to other dynamic qualities, such as the measurement of lack of balance du
25、ring rotation, balancing or the measurement of gripping power. 3.3 Tests to be performed When inspecting a chuck, it is not always necessary to carry out all the tests described in this part of ISO 3442. The users of this part of ISO 3442 may choose those tests which relate to the properties that ar
26、e of interest to them. 4 Accuracy classes This part of ISO 3442 specifies only one accuracy class. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 01:53:32 MDTNo reproduction or
27、networking permitted without license from IHS -,-,- ISO 3442-3:2007(E) 2 ISO 2007 All rights reserved 5 Sizes for interchangeability 5.1 90 serrations Dimensions The sizes for interchangeability are shown in Figure 1 and Table 1. a Any profile contained within the hatched area is acceptable. Figure
28、1 90 serrations Table 1 Dimensions of 90 serrations Checking dimensions Designation p h/2 r1 r2 min. a min. b max. c max. d1a e 1/16“ 90 b 1,587 5 0,397 0,12 to 0,18 0,25 0,64 0,71 0,35 1,1 0,93 3/32“ 90 b 2,3812 5 0,595 0,15 to 0,25 0,4 0,97 1,08 0,57 1,65 1,4 a The pin diameters given are recommen
29、ded values. If pins of non-standard diameter are used, the manufacturer shall be responsible for recalculating the dimensions such that the form and geometry conform with this part of ISO 3442. b 1/16“ and 3/32“ designations are commonly used even though they originate from inch dimensions. 5.2 90 s
30、errations Permissible cumulative pitch deviation The permissible deviations are shown in Table 2 in function of the measuring length and the number of teeth, for both 1/16“ 90 and 3/32“ 90 serrations. Table 2 Permissible deviations for 90 serrations Designation 1/16“ 90 3/32“ 90 Permissible deviatio
31、n Measuring length Number of teeth Measuring length Number of teeth 0,008 25,4 16 26,194 11 0,012 50,8 32 50,006 21 0,016 76,2 48 76,2 32 0,020 101,6 64 102,394 43 0,024 127 80 126,206 53 0,028 152,4 96 152,4 64 Copyright International Organization for Standardization Provided by IHS under license w
32、ith ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 01:53:32 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3442-3:2007(E) ISO 2007 All rights reserved 3 5.3 60 serrations Dimensions The sizes for interchangeability are shown in Figure 2 a
33、nd Table 3. a Any profile contained within the hatched area is acceptable. Figure 2 60 serrations Table 3 Dimensions of 60 serrations Checking dimensions Designation p h/2 r1 r2 min. a min. b max. c max. d1a e 1,5 60 1,5 0,65 0,12 to 0,2 0,24 0,24 0,435 0,502 0,866 0,65 3 60 3 1,299 0,22 to 0,5 0,42
34、 0,42 0,780 0,901 1,732 1,299 a The pin diameters given are recommended values. If pins of non-standard diameter are used, the manufacturer shall be responsible for recalculating the dimensions such that the form and geometry conform with this part of ISO 3442. 5.4 60 serrations Permissible cumulati
35、ve pitch deviation The permissible deviations are shown in Table 4 in function of the measuring length and the number of teeth, for both 1,5 60 and 3 60 serrations. Table 4 Permissible deviations for 60 serrations Designation 1,5 60 3 60 Permissible deviation Measuring length Number of teeth Measuri
36、ng length Number of teeth 0,008 30 20 30 10 0,013 60 40 60 20 0,018 90 60 90 30 0,023 120 80 120 40 0,028 150 100 150 50 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 01:53:32
37、MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3442-3:2007(E) 4 ISO 2007 All rights reserved 5.5 Jaw nuts Dimensions The sizes for interchangeability are shown in Figure 3 and Table 5, in function of the nominal size of the chuck and the corresponding serration adopted
38、. Figure 3 Jaw nuts Table 5 Dimensions of jaw nuts Nominal diameter of chuck dnom 100 125 160 200 250 315 400 500 630 800 d2 10 12 14 17 21 21 25,5 25,5 25,5 25,5 t2 2,5 2,5 2,5 2,5 2,5 2,5 3,5 3,5 3,5 3,5 t1 4,5 4,5 4,5 4,5 4,5 4,5 5,5 5,5 5,5 5,5 Jaw nut d3 a M6 M8 M10 M12 M16 M16 M20 M20 M20 M20
39、Designation of the serration 1/16“ 90 1,5 60 3/32“ 90 3 60 a Tolerance of thread, 6H (see ISO 965-3). Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 01:53:32 MDTNo reproduction
40、or networking permitted without license from IHS -,-,- ISO 3442-3:2007(E) ISO 2007 All rights reserved 5 6 Geometric tests 6.1 Test mandrels The test mandrels shall be manufactured from solid steel and hardened to avoid damage to external surface due to the gripping force of the chuck. The test mand
41、rel diameter should be approximately equal to 20 % of the nominal chuck diameter or as agreed between the manufacturer and the user. The accuracy of test mandrels used shall be as specified in ISO 230-1:1996, A.3, for test mandrels of similar diameters. Figure 4 Tolerances of test jaws 6.2 Spindle o
42、r face plate accuracy For the geometric tests which involve chuck rotation, the chuck should be mounted on a test spindle either directly or by means of a chuck adaptor. The radial run-out on the outside diameter of the spindle or face plate, and the camming at any point on its face, shall have been
43、 previously checked as in G01 and G02. 6.3 Chuck body accuracy Tests G1 and G2 refer to the accuracy of the body only. The tests should be carried out without clamping force. 6.4 Test with test top jaws (hard jaws) The geometric test shall be performed using test jaws with flat nose, machined off th
44、e chuck, case hardened (60 HRC to 62 HRC) to allow them to withstand the clamping forces without permanent distortion. The clamping force shall be at the level of 67 % (2/3) of the maximum gripping force for that chuck. The functional dimensions for a set of test jaws shall be within 0,005 mm (see F
45、igure 4). Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 01:53:32 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3442-3:2007(E) 6 ISO 2007 All rig
46、hts reserved 6.5 Tests with machined top jaws Tests G5 and G6 are performed with a set of top jaws mounted, paired, marked and machined in assembly with the base jaws on the chuck. The top jaws are machined both on the clamping surfaces and on the axial part locating surfaces, under clamped conditio
47、ns. The clamping force, for machining of the top jaws and for performing tests G5 and G6, shall be at the level of 67 % (2/3) of the maximum clamping force for that chuck. These tests show the maximum possible accuracy of the chuck clamping as long as the top and base jaws are kept paired together as machined. Switching the top and base jaws will in most cases diminish the clamping accuracy of the chuck (unless G3 shows perfect compliance). These tests are used to validate the accuracy of the chuck for a given diameter. 6.6 Tests off-the-spindle Tests G7 and G8 do not require us