Rolling bearings—Needle roller bearings with drawn cup and without inner ring—Boundary dimensions,geometrical product specifications(GPS)and tolerance values
This standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This standard replaces GB/T 12764-2009 Rolling Bearings — Needle Roller Bearings, Drawn Cup without Inner Ring — Boundary Dimensions and Tolerance in whole, and the following technical deviations have been made with respect to GB/T 12764-2009:
— addition of the term of “constraint diameter” (see Clause 3);
— application of geometrical product specifications, modification of some symbols and their meanings, modification of drawing notations (see Clause 4 hereof; Clause 4 of Edition 2009, Figure 1);
— addition of the description of the upper and lower limits of C1s, C2s, rs (see 6.3.2 and 6.3.3);
— deletion of the measurement of the smallest single bore diameter of needle roller complement (see Clause 7 of Edition 2009).
This standard is identical with International Standard ISO 3245:2015 Rolling Bearings — Needle Roller Bearings with Drawn Cup and Without Inner Ring — Boundary Dimensions, Geometrical Product Specifications (GPS) and Tolerance Values.
The Chinese documents consistent and corresponding with the normative international documents in this standard are as follows:
— GB/T 4199-2003 Rolling Bearing — Tolerances — Definitions (ISO 1132-1:2000, MOD)
— GB/T 6930-2002 Rolling Bearings — Vocabulary (ISO 5593:1997, IDT)
— GB/T 7811-2015 Rolling Bearings — Vocabulary (ISO 15241:2012, IDT)
— GB/T 16892-1997 Geometrical Tolerancing Indication of Non-rigid Parts (eqv ISO 10579:1993)
This standard was proposed by the China Machinery Industry Federation.
This standard is under the jurisdiction of the National Technical Committee 98 on Rolling Bearings of Standardization Administration of China (SAT/TC 98).
The previous editions of this standard are as follows:
— GB/T 12764-1985, GB/T 12764-2009.
Introduction
This standard is a machine element geometry standard as defined in the geometrical product specification system (GPS system) as presented in matrix model of ISO 14638 [9].
The fundamental rules of ISO/GPS given in ISO 8015 [6] apply to this standard and the default decision rules given in ISO 14253-1 [7] apply to specifications made in accordance with this standard, unless otherwise indicated.
The connection between functional requirements, measuring technique and measuring uncertainty is always intended to be considered. The traditionally used measuring technique is described in ISO 1132-2 [4]. For measurement uncertainty, it is intended that ISO 14253-2 [8] be considered.
Rolling Bearings — Needle Roller Bearings with Drawn Cup and without Inner Ring — Boundary Dimensions, Geometrical Product Specifications (GPS) and Tolerance Values
1 Scope
This standard specifies the boundary dimensions and preferred dimensions to be used for drawn cup needle roller bearings without inner ring as well as the minimum chamfer dimension limits. Also specified are the closed end thickness dimensions for bearings with one closed end.
In addition, dimensional tolerances for the needle roller complement bore diameter and tolerances for the drawn cup width are specified.
Informative values for the tolerances for shaft raceway and housing bore are given in Annex A.
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 1132-1 Rolling Bearings — Tolerances — Part 1: Terms and Definitions
ISO 5593 Rolling Bearings — Vocabulary
ISO 10579 Geometrical Product Specifications (GPS) — Dimensioning and Tolerancing — Non-rigid Parts
ISO 14405-1 Geometrical Product Specifications (GPS) — Dimensional Tolerancing — Part 1: Linear Sizes
ISO 15241 Rolling Bearings — Symbols for Physical Quantities
ISO/TS 17863 Geometrical Product Specification (GPS) — Geometrical Tolerancing of Moveable Assemblies
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in ISO 1132-1, ISO 5593, ISO 14405-1 and the following apply.
3.1
constraint diameter
D1c
diameter of the feature used in constraint condition to establish ΔFws characteristics
Note: It corresponds to the diameter of the ring gauge in ISO 1132-2 [4].
4 Symbols
For the purposes of this document, the symbols given in ISO 15241 and the following apply.
Descriptions for symbols are in accordance to GPS terminology. The dimensional specifications are described in Table 1 and Figure 1.
Figure 1 presents the dimensioning associated to a needle roller bearing, using the symbols introduced in Table 1.
Tolerance value associated to a characteristic is symbolized by t followed by the symbol of characteristic, for example, tΔCs.
In this standard, the ISO default specification operator for size is according to ISO 14405-1; i.e. the two-point size is valid.
Foreword II
Introduction IV
1 Scope
2 Normative References
3 Terms and Definitions
4 Symbols
5 Boundary Dimension
6 Tolerance
Annex A (Informative) Tolerances for Shaft Raceway and Housing Bore
Bibliography
ICS 21.100.20
J 11
GB
中华人民共和国国家标准
GB/T 12764—2019/ISO 3245:2015
代替GB/T 12764—2009
滚动轴承 无内圈冲压外圈滚针轴承
外形尺寸、产品几何技术规范(GPS)和公差值
Rolling bearings—Needle roller bearings with drawn cup and without inner ring—
Boundary dimensions,geometrical product specifications( GPS) and tolerance values
(ISO 3245:2015,IDT)
2019-10-18发布 2020-05-01实施
国家市场监督管理总局
中国国家标准化管理委员会 发布
前言
本标准按照GB/T 1.1—2009给出的规则起草。
本标准代替GB/T 12764—2009《滚动轴承 无内圈、冲压外圈滚针轴承 外形尺寸和公差》,与GB/T 12764—2009相比,主要技术变化如下:
——增加了术语“约束直径”(见第3章);
——应用了产品几何技术规范,修改了部分符号及其含义,修改了图样标注(见第4章,2009年版的第4章、图1);
——增加了对C1s、C2s、rs上、下限值的说明(见6.3.2、6.3.3);
——删除了滚针总体最小单一内径的测量方法(见2009年版的第7章)。
本标准使用翻译法等同采用ISO 3245:2015《滚动轴承 无内圈冲压外圈滚针轴承 外形尺寸、产品几何技术规范(GPS)和公差值》。
与本标准中规范性引用的国际文件有一致性对应关系的我国文件如下:
——GB/T 4199—2003 滚动轴承 公差 定义(ISO 1132-1:2000,MOD)
——GB/T 6930—2002 滚动轴承 词汇(ISO 5593:1997,IDT)
——GB/T 7811—2015 滚动轴承 参数符号(ISO 15241:2012,IDT)
——GB/T 16892—1997 形状和位置公差 非刚性零件注法(eqv ISO 10579:1993)
本标准由中国机械工业联合会提出。
本标准由全国滚动轴承标准化技术委员会(SAC/TC 98)归口。
本标准所代替标准的历次版本发布情况为:
——GB/T 12764—1991、GB/T 12764—2009。
引言
本标准是产品几何技术规范(GPS)体系(见ISO 14638[9]矩阵模型)中规定的机械零件几何要素标准。
除另有规定外,ISO 8015[6]中给出的ISO/GPS的基本原则适用于本标准,ISO 14253-1[7]中给出的缺省原则适用于根据本标准制定的技术规范。
对于功能要求与测量方法、测量不确定度之间的关系,建议予以考虑,传统的测量方法在ISO 1132-2[4]中给出了说明,测量不确定度则建议关注ISO 14253-2[8]。
滚动轴承 无内圈冲压外圈滚针轴承
外形尺寸、产品几何技术规范(GPS)和公差值
1 范围
本标准规定了无内圈冲压外圈滚针轴承的外形尺寸、优选尺寸、最小倒角尺寸。同时规定了封口型冲压外圈滚针轴承的封闭端厚度。
此外,本标准还规定了滚针总体内径尺寸公差和冲压外圈宽度公差。
轴滚道和轴承座孔的公差参见附录A。
2 规范性引用文件
下列文件对于本文件的应用是必不可少的。凡是注日期的引用文件,仅注日期的版本适用于本文件。凡是不注日期的引用文件,其最新版本(包括所有的修改单)适用于本文件。
ISO 1132-1 滚动轴承 公差 第1部分:术语和定义(Rolling bearings—Tolerances—Part 1:Terms and definitions)
ISO 5593 滚动轴承 词汇( Rolling bearings—Vocabulary)
ISO 10579 产品几何技术规范(GPS) 尺寸和公差 非刚性零件[Geometrical product specifications (GPS)—Dimensioning and tolerancing—Non-rigid parts]
ISO 14405-1 产品几何技术规范(GPS) 尺寸公差 第1部分:线性尺寸[Geometrical product specifications (GPS)—Dimensional tolerancing—Part 1:Linear sizes]
ISO 15241 滚动轴承 参数符号( Rolling bearings—Symbols for physical quantities)
ISO/TS 17863 产品几何技术规范(GPS) 活动组件的几何公差[Geometrical product specification (GPS)—Geometrical tolerancing of moveable assemblies]
3 术语和定义
ISO 1132-1、ISO 5593和ISO 14405-1界定的以及下列术语和定义适用于本文件。
3.1
约束直径 constraint diameter
D1c
评定ΔFws特性时在约束条件下要素的直径。
注:约束直径与ISO 1132-2[4]中的环规直径相等。
4 符号
ISO 15241 给出的以及下列符号适用于本文件。
符号的说明与GPS术语一致。尺寸的技术规范在表1和图1中予以说明。
图1给出了滚针轴承相关尺寸的标注示例,图中使用符号的含义见表1。
与特性相关的公差值用t加特性符号表示,如:tΔCs。
本标准中缺省的ISO尺寸规范操作集与ISO 14405-1一致,即两点尺寸有效。
表1 公称尺寸符号、特性符号和规范修饰符
公称尺寸和距离符号a 特性符号 规范修饰符b 说明
C 冲压外圈公称宽度
ΔCs 冲压外圈宽度最小外接尺寸与公称尺寸的偏差
C1 成型底面冲压外圈端部公称厚度
C1s 成型底面冲压外圈端部单一厚度(最小外接尺寸)
C2 平底型冲压外圈端部公称厚度
C2s 平底型冲压外圈端部单一厚度(最小外接尺寸)
D 冲压外圈公称外径
Fw 滚针总体公称内径
ΔFwsc 滚针总体内径最大内接尺寸的最小值d与公称尺寸的偏差
r 公称倒角e尺寸
rs 单一倒角尺寸
a 除了格式,按ISO 15241中定义的符号。
b 按ISO 14405-1中定义的符号。
c 固定零件和活动零件的约束条件和规范修饰符按ISO/TS 17863的规定,见图1。
d 最小值考虑了滚针总体旋转运动的影响。
e 本标准中的倒角为圆角。
a) 开口型轴承
b) 封口型轴承
=在将①压入内径为D1c环规中的约束条件下有效,D1c的值见表4、表5
=FP①-MP②
=滚针应与冲压外圈滚道接触
=旋转时同轴
说明:
①——冲压外圈;
②——滚针总体。
图1 无内圈冲压外圈滚针轴承结构示例
5 外形尺寸
封口型和开口型无内圈冲压外圈滚针轴承的公称外形尺寸直径系列1D按表2的规定,直径系列2D按表3的规定。
表2 封口型和开口型无内圈冲压外圈滚针轴承外形尺寸——直径系列1D 单位为毫米
Fw D C C1a C2a rb
尺寸系列
21D 31D 41D 51D 61D 71D 81D 91D
注:下边加横线的值为优选尺寸。
a C1和C2分别为C1s和C2s的上限值。
b 倒角尺寸r为rs的下限值。
表3 开口型和封口型无内圈冲压外圈滚针轴承外形尺寸——直径系列2D 单位为毫米
Fw D C C1a C2a rb
尺寸系列
22D 32D 42D 52D 62D 72D 82D
a C1和C2分别为C1s和C2s的上限值。
b 倒角尺寸r为rs的下限值。
6 公差
6.1 总则
在表4~表6中,符号U和L规定如下:
U——上极限偏差;
L——下极限偏差。
6.2 内径公差
根据ISO 10579中的定义,冲压外圈滚针轴承为非刚性零件,在检验滚针总体内径时需将冲压外圈压入一环规中。
ISO 10579中规定的自由状态条件对尺寸C、C1、C2和r的公差是有效的。
ΔFws的公差tΔFws见表4和表5。
表4 ΔFws的公差——直径系列1D 单位为毫米
Fw Da 约束直径b
D1c tΔFws
U L
a 未规定冲压外圈外径D的偏差。轴承制造商应保证满足功能要求的配合。
b 如果实际约束直径偏离其规定值,应修正tΔFws以补偿此偏差。
表5 ΔFws的公差——直径系列2D 单位为毫米
Fw Da 约束直径b
D1c tΔFws
U L
a 未规定冲压外圈外径D的偏差。轴承制造商应保证满足功能要求的配合。
b 如果实际约束直径偏离其规定值,应修正tΔFws以补偿此偏差。
6.3 冲压外圈公差
6.3.1 冲压外圈宽度,C
冲压外圈宽度C的公差见表6。
表6 冲压外圈宽度公差 单位为毫米
C tΔCs
U L
所有宽度 0 -0.3
6.3.2 成型底面和平底型冲压外圈端部厚度C1和C2
C1和C2分别为C1s和C2s的上限值(见表2、表3)。
规定C1和C2的值是为了使用中避免轴端面与冲压外圈内端面接触。
未规定C1s和C2s的下限值。
GPS标注见图1b)。
6.3.3 倒角尺寸,r
倒角尺寸r为rs的下限值(见表2、表3)。
未规定倒角尺寸的上限值。
附录A
(资料性附录)
轴滚道和轴承座孔公差
A.1 总则
冲压外圈滚针轴承能否正常工作与用户所提供轴的质量以及和被压入质量合适的轴承座的配合有关。轴承座应具有足够的强度以修正轴承的圆度和尺寸。
本附录中给出了轴滚道和轴承座孔建议的公差和公差值。
图中数值仅供参考,这些数值在某些特定的运转条件和特性下可能不适用。如有疑问,可向轴承制造商咨询具体建议。
A.2 滚道硬度和淬硬层深度
轴滚道淬硬并精磨。表面硬度最低670 HV(58HRC)。滚道的最小淬硬层深度为0.3mm~0.8mm,最小淬硬层深度取决于轴承尺寸、滚动体直径、轴的热处理工艺和载荷条件。如有疑问,可向轴承制造商咨询具体建议。
注:淬硬层深度的定义按ISO 2639:2002[5],3.1。
A.3 符号
下列符号适用于本附录。
D1:轴承座孔公称直径
d1:轴公称直径
A.4 轴滚道和轴承座孔结构
图A.1给出了轴滚道和轴承座孔公差的建议值。
公差适用于固定的轴承座和旋转轴,若轴承座旋转,可向轴承制造商咨询具体建议。图A.1中与公称直径相关的标准公差等级(IT3和IT5)数值及公差等级(h6或N6)的极限偏差值按ISO 286-1[1]的规定。
说明:
1——轴的公称直径d1(=Fw);
2——轴承座孔的公称直径D1(=D);
3——钢或铸铁轴承座的公差等级为N6,轻金属轴承座的公差等级为R6(见注2);
4——圆柱度按ISO 1101[3];
5——或 ;
6——或 。
注1:轴承座的建议值适用于与轴承装配的表面。轴滚道的技术要求适用于轴表面的功能性部分。
注2:其他材料轴承座结构的具体建议可向轴承制造商咨询。
图A.1 轴和轴承座结构
参考文献
[1] ISO 286-1 Geometrical product specifications (GPS)—ISO code system for tolerances on linear sizes—Part 1:Basis of tolerances,deviations and fits
[2] ISO 286-2 Geometrical product specifications (GPS)—ISO code system for tolerances on linear sizes—Part 2:Tables of standard tolerance classes and limit deviations for holes and shafts
[3] ISO 1101 Geometrical product specifications (GPS)—Geometrical tolerancing—Tolerances of form,orientation,location and run-out
[4] ISO 1132-2 Rolling bearings—Tolerances—Part 2:Measuring and gauging principles and methods
[5] ISO 2639:2002 Steels—Determination and verification of the depth of carburized and hardened cases
[6] ISO 8015 Geometrical product specifications (GPS)—Fundamentals—Concepts,principles and rules
[7] ISO 14253-1 Geometrical product specifications (GPS)—Inspection by measurement of work pieces and measuring equipment—Part 1:Decision rules for proving conformity or nonconformity with specifications
[8] ISO 14253-2 Geometrical product specifications (GPS)—Inspection by measurement of work pieces and measuring equipment—Part 2:Guidance for the estimation of uncertainty in GPS measurement,in calibration of measuring equipment and in product verification
[9] ISO 14638 Geometrical product specification (GPS)—Matrix model