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1、ANSI/AGMA1102-A03 ANSI/AGMA 1102-A03 (Revision of AGMA 120.01) AMERICAN NATIONAL STANDARD Tolerance Specification for Gear Hobs Copyright American Gear Manufacturers Association Provided by IHS under license with AGMA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 03
2、:51:00 MDTNo reproduction or networking permitted without license from IHS -,-,- ii Tolerance Specification for Gear Hobs ANSI/AGMA 1102-A03 Revision of AGMA 120.01 (1975) Approval of an American National Standard requires verification by ANSI that the require- ments for due process, consensus, and
3、other criteria for approval have been met by the standards developer. Consensus is established when, in the judgment of the ANSI Board of Standards Review, substantial agreement has been reached by directly and materially affected interests. Substantialagreementmeansmuchmore thana simplemajority, bu
4、tnot necessarilyuna- nimity.Consensus requires that all views and objections be considered, and that a concerted effort be made toward their resolution. The use of American NationalStandards is completely voluntary; their existence does not in any respect preclude anyone, whether he has approved the
5、 standards or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not conforming to the standards. The American National Standards Institute does not develop standards and will in no circumstances give an interpretation of any American National Standard. Moreo
6、ver, no person shall have the right or authority to issue an interpretation of an American National StandardinthenameoftheAmericanNationalStandardsInstitute. Requestsforinterpre- tation of this standard should be addressed to the American Gear Manufacturers Association. CAUTION NOTICE: AGMA technica
7、l publications are subject to constant improvement, revision, or withdrawal as dictated by experience. Any person who refers to any AGMA technical publication should be sure that the publication is the latest available from the Association on the subject matter. Tables or other self-supporting secti
8、ons may be referenced. Citations should read: See ANSI/AGMA 1102-A03, Tolerance Specification for Gear Hobs, published by the American Gear Manufacturers Association, 500 Montgomery Street, Suite 350, Alexandria, Virginia 22314, http:/www.agma.org. Approved December 11, 2003 ABSTRACT The purpose of
9、this standard is to provide specifications for nomenclature, dimensions, tolerances, and inspection of gear hobs, and thereby establish a basis for mutual understanding in this respect in the use and manufacture of these tools. Published by American Gear Manufacturers Association 500 Montgomery Stre
10、et, Suite 350, Alexandria, Virginia 22314 Copyright 2003 by American Gear Manufacturers Association All rights reserved. No part of this publication may be reproduced in any form, in an electronic retrieval system or otherwise, without prior written permission of the publisher. Printed in the United
11、 States of America ISBN: 1-55589-816-5 American National Standard Copyright American Gear Manufacturers Association Provided by IHS under license with AGMA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 03:51:00 MDTNo reproduction or networking permitted without lice
12、nse from IHS -,-,- ANSI/AGMA 1102- -A03AMERICAN NATIONAL STANDARD iii AGMA 2003 - All rights reserved Contents Page Forewordiv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Scope1. . . . . . . . . . . . . . . . . . . . .
13、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Normative references1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Terminology and definitions1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14、. . . . . . . 4Hob classifications, drawings, and identification markings6. . . . . . . . . . . . . . . . . 5Manufacturing and purchasing considerations8. . . . . . . . . . . . . . . . . . . . . . . . . . . 6Gear hobs single and multiple start accuracy requirements12. . . . . . . . . . . 7Measuring
15、methods and practices13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Annexes AGear manufacturing terminology33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BHob design parameters35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16、. . . . . . . . . . . . CEquations and terminology for straight-sided hob profiles37. . . . . . . . . . . . . . . . DIntermediate values for multiple thread tolerance calculations43. . . . . . . . . . . . EEffects of hob accuracy on gear accuracy45. . . . . . . . . . . . . . . . . . . . . . . . . .
17、. . . Figures 1Hob nomenclature2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2Cam2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Engagement zone2. . . . . . . . . . .
18、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Protuberance on a gear hob tooth4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Negative rake5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
19、 . . . . 6Positive rake5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Zero rake5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Tip relief on a gear tooth6. . . . . .
20、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Normal section7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tables 1Hob markings8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21、. . . . . . . . . . . . . . . 2Reference for measurement methods9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Accuracy requirements20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Copyright American Gear Manufacturers Association Pro
22、vided by IHS under license with AGMA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 03:51:00 MDTNo reproduction or networking permitted without license from IHS -,-,- ANSI/AGMA 1102- -A03AMERICAN NATIONAL STANDARD iv AGMA 2003 - All rights reserved Foreword The forew
23、ord, footnotes and annexes, if any, in this document are provided for informational purposes only and are not to be construed as a part of ANSI/AGMA Standard 1102-A03, Tolerance Specification for Gear Hobs. ANSI/AGMA 1102-A03 is a replacement of AGMA 120.01. The first draft of AGMA 120.01 was prepar
24、ed by the CuttingTools Committeein May,1972. Its purposewas toconsolidate all AGMA standards relating to hobs; i.e., AGMA 121.02, 122.02, 123.01 and 124.01. The purpose of consolidating these standards was to provide the information as a handy updated reference on gear-cutting tools for efficient us
25、e by manufacturers and users of these tools. The committee decided at the 1972 Semi-Annual Meeting to include Standard 124.01, Wormgear Hobs, as an Information Sheet. AGMA 120.01 was approved by the Cutting Tools Committee on November 6, 1973. It was approved by the AGMA Membership as of February 28
26、, 1975. ANSI/AGMA1102-A03istheresultofarewriteofAGMA120.01,incorporationofthemetric system, addition of inspection procedures, and development of equation based tolerances. Other additions include increased tolerance grade levels, expansion of tolerances for multi-thread hobs, line of action testing
27、, and expansion of the hob range of sizes. The first draft of AGMA 1102-A03 was made in February, 1999. It was approved by the AGMA membership in October, 2003. It was approved as an American National Standard on December 11, 2003. Suggestions for improvement of this standard will be welcome. They s
28、hould be sent to the AmericanGearManufacturersAssociation,500MontgomeryStreet,Suite350,Alexandria, Virginia 22314. Copyright American Gear Manufacturers Association Provided by IHS under license with AGMA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 03:51:00 MDTNo
29、reproduction or networking permitted without license from IHS -,-,- ANSI/AGMA 1102- -A03AMERICAN NATIONAL STANDARD v AGMA 2003 - All rights reserved PERSONNEL of the AGMA Cutting Tools Committee Chairman: Michael TennuttiStar-SU, Inc./Star Cutter Company. . . . . . . . . . . . . . . . . . . . . . .
30、. . . . ACTIVE MEMBERS C. AwotKoepfer America, L.L.C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T.R. BlumGleason Works. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . J. BrunnerFalk Corporation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . J.V.
31、CaldwellSU America, Inc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D. HoyingM one side longer, the other side shorter. This resultsinthetooththicknessbeingsuccessivelyless toward the roughing end of the hob. axial plane: plane containing the axis of rotation. axialpressureangle:seedef
32、initionunder pressure angle. back- -off:see preferred term cam relief, under relief. bore diameter: diameter of the mounting hole for arbor type hobs. Copyright American Gear Manufacturers Association Provided by IHS under license with AGMA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not fo
33、r Resale, 04/18/2007 03:51:00 MDTNo reproduction or networking permitted without license from IHS -,-,- ANSI/AGMA 1102- -A03AMERICAN NATIONAL STANDARD 2 AGMA 2003 - All rights reserved Lead angle R.H. Outside diameter Pitch cylinder diameter Hub diameter Length See figure 9 Tooth face Bore diameter
34、Axial pitch Axial lead Multiple threads Flute helix angle Figure 1 - - Hob nomenclature bore diameter: diameter of the mounting hole for arbor type hobs. cam: radial drop of the form in the angular distance between adjacent tooth faces. See figure 2. Cam Figure 2 - - Cam cam relief: see definition u
35、nder relief. chamfer: beveled surface to eliminate anotherwise sharp corner. clutch keyway: see face keyway. depth of cut: radial depth to which the hob is sunk into the workpiece. See related term whole depth. deviation: differences observed during testing that are compared against the specified va
36、lue or toler- ance. engagement zone: axial distance within which the hob interacts with the involute portion of a gear tooth profile being generated.It is equal to the axial component of the hob line of action within the confines of the functional profile. See figure 3. Involute generating path of e
37、ngagementLine of action functional profile depth engagement zone Figure 3 - - Engagement zone evaluation zone: full toothed portion of the hob. face keyway: transverse slot across the hub face. fillet: 1) curved line joining two lines to eliminate a sharp internal corner; 2) curved surface joining t
38、wo surfaces to eliminate a sharp internal corner. Copyright American Gear Manufacturers Association Provided by IHS under license with AGMA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 03:51:00 MDTNo reproduction or networking permitted without license from IHS -,-
39、,- ANSI/AGMA 1102- -A03AMERICAN NATIONAL STANDARD 3 AGMA 2003 - All rights reserved flute: longitudinal groove, either straight or helical, that forms the tooth face of one row of hob teeth and the backs of the preceding row. flute helix angle: angle which a helical tooth face makes with an axial pl
40、ane, measured on the hob pitch cylinder. flute index: see tooth face index. flute lead: axial advance of a flute face in one turn around the axis of a hob. flute lead deviation: deviation of a hob tooth face from the desired helical surface. full tip radius: continuousradius tangentto topand side cu
41、tting edges. functional profile:portion of hob tooth that generates the involute profile of a gear tooth. It is limited toward the tip by the start of tip radius or, when present, start of protuberance modification. It is limited toward the root by the hob tooth dedendum or, when present, start of t
42、ip relief or chamfer modification. See figure 3. functional profile depth: depth of the functional profile. gash: see preferred term flute. generated fillet: at the bottom of the hobbed form, fillet joining the root diameter with the desired generated form.This fillet is not a true radius (trochoid
43、form). generated fillet height: on the hobbed workpiece, radial distance from the root diameter to the point where the generated fillet joins the desired gener- ated form. helicoid, Archimedes: plane surface of compound curvature, defined by its intersections with the following planes: -intersection
44、 with a transverse plane is an Archimedes spiral; -intersection with a concentric cylinder is a helix; -intersection with an axial plane is a straight line. helicoid, involute:plane surface of compound curvature, defined by its intersections with the following planes: -intersection with a transverse
45、 plane is an involute curve; -intersection with a concentric cylinder is a helix; -intersection with a plane of action is a straight line. hob addendum: radial distance between the top of thehobtoothandthepitchcylinder(gear dedendum). hob dedendum: in topping hobs, radial distance between the bottom
46、 of hob tooth profile and pitch cylinder (gear addendum). hob full- -topping: hob that cuts the gear outside diameter and chamfers the gear tooth tip. hob, non- -topping:hob that does not cut the outside diameter of the gear. hob, topping:hob that cuts the gear outside diameter. hob runout: runout o
47、f the hob when mounted in a hobbingmachine,measuredradiallyonhub diameter, and axially on hub face. hob, semi- -topping: hob that produces a chamfer or tip relief on the gear. hob teeth in engagement zone:within a given thread, the approximate number of hob teeth included in the engagement zone. Thi
48、s is also the number of teeth involved in generating the involute portion of the gear tooth profile. See figure 3. hob tip modification: modification on the sides of the hob tooth near the top. hob tooth depth:minimum active depth of hob tooth form. hook: see preferred term rake. hub: qualifying surface at each end of an arbor type hob which is provided for checking diameter and face runout. On a shank style hob, it is the clamping surfaces or proof bands, when available. hub diameter runout:total deviation in radial distance of the hub periphery from the axis. hub face: side