1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58self-centring chucks with two-piece jaws Part 3: Power-operated chucks with serrated jawsICS 25.060
2、.20Machine tools Dimensions and geometric tests for BRITISH STANDARDBS ISO 3442-3:2007BS ISO 3442-3:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 March 2007 BSI 2007ISBN 978 0 580 50196 8Amendments issued since publicationAmd. No. Da
3、te CommentsThis publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.National forewordThis British Standard was published by BSI. It is th
4、e UK implementation of ISO 3442-3:2007. Together with BS ISO 3442-1 and BS ISO 3442-2 it supersedes BS 1983-7:1994 and BS 1983-6:1994 which are withdrawn.The UK participation in its preparation was entrusted to Technical Committee MTE/1, Machine tools.A list of organizations represented on MTE/1 can
5、 be obtained on request to its secretary.Reference numberISO 3442-3:2007(E)INTERNATIONAL STANDARD ISO3442-3First edition2007-02-01Machine 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 e
6、ssais gomtriques pour mandrins serrage concentrique et mors rapports Partie 3: Mandrins commande axiale assiste avec mors assemblage par dentelure BS ISO 3442-3:2007ii iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Preliminary remarks . 1 3.1 Measuring units 1 3.2 Geometric te
7、sts. 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 cumulative 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
8、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 Tests with machined top jaws. 6 6.6 Tests off-the-spindle. 6 6.7 Chuck accuracy 9 BS ISO 3442-3:2007iv Foreword ISO (the International Organization f
9、or Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has th
10、e right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Internat
11、ional 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 Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication
12、 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 this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
13、 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 with 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 3442:19
14、91 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 consists of the following parts, under the general title Machine tools Dimensions and geometric tests for self-centring chucks with
15、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 chucks with serrated jaws BS ISO 3442-3:20071Machine tools Dimensions and geometric tests for self-centring chucks with two-piece ja
16、ws 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 for mounting the top jaws on the base jaws of power chucks, in order to ensure interchangeability. It also describes, with reference to ISO
17、 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. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references,
18、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 for machine tools Part 1: Geometric accuracy of machines operating under no-load or finishing conditions ISO 965-3, ISO general purpose
19、metric screw threads Tolerances Part 3: Deviations for constructional screw threads 3 Preliminary remarks 3.1 Measuring units All dimensions and tolerances in this part of ISO 3442 are expressed in millimetres. 3.2 Geometric tests This part of ISO 3442 deals only with the inspection of rotational ac
20、curacy 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 during rotation, balancing or the measurement of gripping power. 3.3 Tests to be performed When inspecting a chuck, it is not always necessa
21、ry 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 are of interest to them. 4 Accuracy classes This part of ISO 3442 specifies only one accuracy class. BS ISO 3442-3:20072 5 Sizes for interch
22、angeability 5.1 90 serrations Dimensions The sizes for interchangeability are shown in Figure 1 and Table 1. aAny profile contained within the hatched area is acceptable. Figure 1 90 serrations Table 1 Dimensions of 90 serrations Checking dimensions Designation p h/2 r1r2min. a min. b max. c max. d1
23、ae 1/16“ 90 b1,587 5 0,397 0,12 to 0,18 0,25 0,64 0,71 0,35 1,1 0,93 3/32“ 90 b2,3812 5 0,595 0,15 to 0,25 0,4 0,97 1,08 0,57 1,65 1,4 aThe pin diameters given are recommended values. If pins of non-standard diameter are used, the manufacturer shall be responsible for recalculating the dimensions su
24、ch that the form and geometry conform with this part of ISO 3442. b1/16“ and 3/32“ designations are commonly used even though they originate from inch dimensions. 5.2 90 serrations Permissible cumulative pitch deviation The permissible deviations are shown in Table 2 in function of the measuring len
25、gth 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 deviation 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
26、 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 BS ISO 3442-3:200735.3 60 serrations Dimensions The sizes for interchangeability are shown in Figure 2 and Table 3. aAny profile contained within the hatched area is acceptable. Figure 2 60 serrations Table 3 Dimensio
27、ns of 60 serrations Checking dimensions Designation p h/2 r1r2min. a min. b max. c max. d1ae 1,5 601,5 0,65 0,12 to 0,2 0,24 0,24 0,435 0,502 0,866 0,65 3 603 1,299 0,22 to 0,5 0,42 0,42 0,780 0,901 1,732 1,299 aThe pin diameters given are recommended values. If pins of non-standard diameter are use
28、d, 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 cumulative pitch deviation The permissible deviations are shown in Table 4 in function of the measuring length and the number of
29、 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 Measuring 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
30、 BS ISO 3442-3:20074 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. Figure 3 Jaw nuts Table 5 Dimensions of jaw nuts Nominal diameter of chuck dnom100 125 160 200 250 31
31、5 400 500 630 800 d210 12 14 17 21 21 25,5 25,5 25,5 25,5 t22,5 2,5 2,5 2,5 2,5 2,5 3,5 3,5 3,5 3,5 t14,5 4,5 4,5 4,5 4,5 4,5 5,5 5,5 5,5 5,5 Jaw nut d3aM6 M8 M10 M12 M16 M16 M20 M20 M20 M20 Designation of the serration 1/16“ 90 1,5 60 3/32“ 90 3 60 aTolerance of thread, 6H (see ISO 965-3). BS ISO 3
32、442-3:200756 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 mandrel diameter should be approximately equal to 20 % of the nominal chuck diameter or as agreed
33、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 or face plate accuracy For the geometric tests which involve chuck rotation, the chuck should b
34、e 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 previously checked as in G01 and G02. 6.3 Chuck body accuracy Tests G1 and G2 refer to the ac
35、curacy 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 the chuck, case hardened (60 HRC to 62 HRC) to allow them to withstand the clamping forces witho
36、ut 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 Figure 4). BS ISO 3442-3:20076 6.5 Tests with machined top jaws Tests G5 and G6 are performed w
37、ith 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 conditions. The clamping force, for machining of the top jaws and for performing test
38、s 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 c
39、lamping 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 use of the test spindle mentioned in 6.2. BS ISO 3442-3:20077Object Checking radial run-out of
40、 the spindle nose or face plate. G01 Diagram Tolerance 0,005 Measured deviation Measuring instruments Dial gauge. References to ISO 230-1:1996 and observations 5.611.4 and 5.612.2In the case of a tapered spindle nose, the stylus of the dial gauge shall be set normal to the surface which is to be che
41、cked. BS ISO 3442-3:20078 Object Checking camming of the spindle nose or face plate. G02 Diagram Tolerance 0,005 Measured deviation Measuring instruments Dial gauge. References to ISO 230-1:1996 and observations 5.63BS ISO 3442-3:200796.7 Chuck accuracy Object Checking radial run-out of the outside
42、diameter. G1 Diagram Nominal diameter of chuck dnomTolerance x (full indicator movement) dnomu 125 125 dnomu 200 200 dnomu 315 315 dnomu 500 500 dnomu 800 0,02 0,03 0,04 0,05 0,06 Measured deviation For dnom= Measuring instruments Dial gauge. References to ISO 230-1 and observations NOTE Two measure
43、ments are possible: a) with the chuck mounted on a spindle, or b) with a measuring machine. The results of the two measurements may differ depending on the tolerances of spindle noses and chuck bodies. BS ISO 3442-3:200710 Object Checking camming of chuck face. G2 Diagram Nominal diameter of chuck d
44、nomTolerance x (full indicator movement) dnomu 125 125 dnomu 200 200 dnomu 315 315 dnomu 500 500 dnomu 800 0,02 0,03 0,04 0,05 0,06 Measured deviation For dnom= Measuring instruments Dial gauge. References to ISO 230-1 and observations The dial gauge should be placed on the maximum possible diameter
45、. NOTE Two measurements are possible: a) with the chuck mounted on a spindle, or b) with a measuring machine. The results of the two measurements may differ depending on the tolerances of spindle noses and chuck bodies. BS ISO 3442-3:200711Object Checking radial run-out of the test mandrels clamped
46、by test jaws (close to the jaw). G3 Diagram Nominal diameter of chuck dnomTolerance x (full indicator movement)dnomu 125 125 dnomu 200 200 dnomu 315 315 dnomu 500 500 dnomu 800 0,08 0,10 0,12 0,14 0,16 Measured deviation For dnom= Measuring instruments Dial gauge. References to ISO 230-1 and observa
47、tionsTo ensure maximum stability of jaw gripping on the test mandrel, it may be axially held on the chuck face, where necessary, by a ground holding plate. This test is performed with an interchangeable set of test jaws, as described above. The results obtained by this test represent only the geomet
48、ric accuracy of the chuck assembly including the base jaws. Compliance with the tolerances as specified for this test will assure interchangeability of the top jaws. The actual clamping accuracy of the chuck can be determined by the use of a set of production jaws ground or turned on the chuck (see
49、G5). BS ISO 3442-3:200712 Object Checking equidistance between the top surfaces of the top jaws (measured with test jaws). G4 Diagram Nominal diameter of chuck dnomTolerance x (full indicator movement) dnomu 125 125 dnomu 200 200 dnomu 315 315 dnomu 500 500 dnomu 800 0,03 0,04 0,06 0,08 0,10 Measured deviation For dnom= Measuring instruments Dial gauge. References to ISO 230-1 a
