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.
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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.
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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
中華人民共和國國家標(biāo)準(zhǔn)
GB/T 12764—2019/ISO 3245:2015
代替GB/T 12764—2009
滾動軸承 無內(nèi)圈沖壓外圈滾針軸承
外形尺寸、產(chǎn)品幾何技術(shù)規(guī)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發(fā)布 2020-05-01實施
國家市場監(jiān)督管理總局
中國國家標(biāo)準(zhǔn)化管理委員會 發(fā)布
前言
本標(biāo)準(zhǔn)按照GB/T 1.1—2009給出的規(guī)則起草。
本標(biāo)準(zhǔn)代替GB/T 12764—2009《滾動軸承 無內(nèi)圈、沖壓外圈滾針軸承 外形尺寸和公差》,與GB/T 12764—2009相比,主要技術(shù)變化如下:
——增加了術(shù)語“約束直徑”(見第3章);
——應(yīng)用了產(chǎn)品幾何技術(shù)規(guī)范,修改了部分符號及其含義,修改了圖樣標(biāo)注(見第4章,2009年版的第4章、圖1);
——增加了對C1s、C2s、rs上、下限值的說明(見6.3.2、6.3.3);
——刪除了滾針總體最小單一內(nèi)徑的測量方法(見2009年版的第7章)。
本標(biāo)準(zhǔn)使用翻譯法等同采用ISO 3245:2015《滾動軸承 無內(nèi)圈沖壓外圈滾針軸承 外形尺寸、產(chǎn)品幾何技術(shù)規(guī)范(GPS)和公差值》。
與本標(biāo)準(zhǔn)中規(guī)范性引用的國際文件有一致性對應(yīng)關(guān)系的我國文件如下:
——GB/T 4199—2003 滾動軸承 公差 定義(ISO 1132-1:2000,MOD)
——GB/T 6930—2002 滾動軸承 詞匯(ISO 5593:1997,IDT)
——GB/T 7811—2015 滾動軸承 參數(shù)符號(ISO 15241:2012,IDT)
——GB/T 16892—1997 形狀和位置公差 非剛性零件注法(eqv ISO 10579:1993)
本標(biāo)準(zhǔn)由中國機械工業(yè)聯(lián)合會提出。
本標(biāo)準(zhǔn)由全國滾動軸承標(biāo)準(zhǔn)化技術(shù)委員會(SAC/TC 98)歸口。
本標(biāo)準(zhǔn)所代替標(biāo)準(zhǔn)的歷次版本發(fā)布情況為:
——GB/T 12764—1991、GB/T 12764—2009。
引言
本標(biāo)準(zhǔn)是產(chǎn)品幾何技術(shù)規(guī)范(GPS)體系(見ISO 14638[9]矩陣模型)中規(guī)定的機械零件幾何要素標(biāo)準(zhǔn)。
除另有規(guī)定外,ISO 8015[6]中給出的ISO/GPS的基本原則適用于本標(biāo)準(zhǔn),ISO 14253-1[7]中給出的缺省原則適用于根據(jù)本標(biāo)準(zhǔn)制定的技術(shù)規(guī)范。
對于功能要求與測量方法、測量不確定度之間的關(guān)系,建議予以考慮,傳統(tǒng)的測量方法在ISO 1132-2[4]中給出了說明,測量不確定度則建議關(guān)注ISO 14253-2[8]。
滾動軸承 無內(nèi)圈沖壓外圈滾針軸承
外形尺寸、產(chǎn)品幾何技術(shù)規(guī)范(GPS)和公差值
1 范圍
本標(biāo)準(zhǔn)規(guī)定了無內(nèi)圈沖壓外圈滾針軸承的外形尺寸、優(yōu)選尺寸、最小倒角尺寸。同時規(guī)定了封口型沖壓外圈滾針軸承的封閉端厚度。
此外,本標(biāo)準(zhǔn)還規(guī)定了滾針總體內(nèi)徑尺寸公差和沖壓外圈寬度公差。
軸滾道和軸承座孔的公差參見附錄A。
2 規(guī)范性引用文件
下列文件對于本文件的應(yīng)用是必不可少的。凡是注日期的引用文件,僅注日期的版本適用于本文件。凡是不注日期的引用文件,其最新版本(包括所有的修改單)適用于本文件。
ISO 1132-1 滾動軸承 公差 第1部分:術(shù)語和定義(Rolling bearings—Tolerances—Part 1:Terms and definitions)
ISO 5593 滾動軸承 詞匯( Rolling bearings—Vocabulary)
ISO 10579 產(chǎn)品幾何技術(shù)規(guī)范(GPS) 尺寸和公差 非剛性零件[Geometrical product specifications (GPS)—Dimensioning and tolerancing—Non-rigid parts]
ISO 14405-1 產(chǎn)品幾何技術(shù)規(guī)范(GPS) 尺寸公差 第1部分:線性尺寸[Geometrical product specifications (GPS)—Dimensional tolerancing—Part 1:Linear sizes]
ISO 15241 滾動軸承 參數(shù)符號( Rolling bearings—Symbols for physical quantities)
ISO/TS 17863 產(chǎn)品幾何技術(shù)規(guī)范(GPS) 活動組件的幾何公差[Geometrical product specification (GPS)—Geometrical tolerancing of moveable assemblies]
3 術(shù)語和定義
ISO 1132-1、ISO 5593和ISO 14405-1界定的以及下列術(shù)語和定義適用于本文件。
3.1
約束直徑 constraint diameter
D1c
評定ΔFws特性時在約束條件下要素的直徑。
注:約束直徑與ISO 1132-2[4]中的環(huán)規(guī)直徑相等。
4 符號
ISO 15241 給出的以及下列符號適用于本文件。
符號的說明與GPS術(shù)語一致。尺寸的技術(shù)規(guī)范在表1和圖1中予以說明。
圖1給出了滾針軸承相關(guān)尺寸的標(biāo)注示例,圖中使用符號的含義見表1。
與特性相關(guān)的公差值用t加特性符號表示,如:tΔCs。
本標(biāo)準(zhǔn)中缺省的ISO尺寸規(guī)范操作集與ISO 14405-1一致,即兩點尺寸有效。
表1 公稱尺寸符號、特性符號和規(guī)范修飾符
公稱尺寸和距離符號a 特性符號 規(guī)范修飾符b 說明
C 沖壓外圈公稱寬度
ΔCs 沖壓外圈寬度最小外接尺寸與公稱尺寸的偏差
C1 成型底面沖壓外圈端部公稱厚度
C1s 成型底面沖壓外圈端部單一厚度(最小外接尺寸)
C2 平底型沖壓外圈端部公稱厚度
C2s 平底型沖壓外圈端部單一厚度(最小外接尺寸)
D 沖壓外圈公稱外徑
Fw 滾針總體公稱內(nèi)徑
ΔFwsc 滾針總體內(nèi)徑最大內(nèi)接尺寸的最小值d與公稱尺寸的偏差
r 公稱倒角e尺寸
rs 單一倒角尺寸
a 除了格式,按ISO 15241中定義的符號。
b 按ISO 14405-1中定義的符號。
c 固定零件和活動零件的約束條件和規(guī)范修飾符按ISO/TS 17863的規(guī)定,見圖1。
d 最小值考慮了滾針總體旋轉(zhuǎn)運動的影響。
e 本標(biāo)準(zhǔn)中的倒角為圓角。
a) 開口型軸承
b) 封口型軸承
=在將①壓入內(nèi)徑為D1c環(huán)規(guī)中的約束條件下有效,D1c的值見表4、表5
=FP①-MP②
=滾針應(yīng)與沖壓外圈滾道接觸
=旋轉(zhuǎn)時同軸
說明:
①——沖壓外圈;
②——滾針總體。
圖1 無內(nèi)圈沖壓外圈滾針軸承結(jié)構(gòu)示例
5 外形尺寸
封口型和開口型無內(nèi)圈沖壓外圈滾針軸承的公稱外形尺寸直徑系列1D按表2的規(guī)定,直徑系列2D按表3的規(guī)定。
表2 封口型和開口型無內(nèi)圈沖壓外圈滾針軸承外形尺寸——直徑系列1D 單位為毫米
Fw D C C1a C2a rb
尺寸系列
21D 31D 41D 51D 61D 71D 81D 91D
注:下邊加橫線的值為優(yōu)選尺寸。
a C1和C2分別為C1s和C2s的上限值。
b 倒角尺寸r為rs的下限值。
表3 開口型和封口型無內(nèi)圈沖壓外圈滾針軸承外形尺寸——直徑系列2D 單位為毫米
Fw D C C1a C2a rb
尺寸系列
22D 32D 42D 52D 62D 72D 82D
a C1和C2分別為C1s和C2s的上限值。
b 倒角尺寸r為rs的下限值。
6 公差
6.1 總則
在表4~表6中,符號U和L規(guī)定如下:
U——上極限偏差;
L——下極限偏差。
6.2 內(nèi)徑公差
根據(jù)ISO 10579中的定義,沖壓外圈滾針軸承為非剛性零件,在檢驗滾針總體內(nèi)徑時需將沖壓外圈壓入一環(huán)規(guī)中。
ISO 10579中規(guī)定的自由狀態(tài)條件對尺寸C、C1、C2和r的公差是有效的。
ΔFws的公差tΔFws見表4和表5。
表4 ΔFws的公差——直徑系列1D 單位為毫米
Fw Da 約束直徑b
D1c tΔFws
U L
a 未規(guī)定沖壓外圈外徑D的偏差。軸承制造商應(yīng)保證滿足功能要求的配合。
b 如果實際約束直徑偏離其規(guī)定值,應(yīng)修正tΔFws以補償此偏差。
表5 ΔFws的公差——直徑系列2D 單位為毫米
Fw Da 約束直徑b
D1c tΔFws
U L
a 未規(guī)定沖壓外圈外徑D的偏差。軸承制造商應(yīng)保證滿足功能要求的配合。
b 如果實際約束直徑偏離其規(guī)定值,應(yīng)修正tΔFws以補償此偏差。
6.3 沖壓外圈公差
6.3.1 沖壓外圈寬度,C
沖壓外圈寬度C的公差見表6。
表6 沖壓外圈寬度公差 單位為毫米
C tΔCs
U L
所有寬度 0 -0.3
6.3.2 成型底面和平底型沖壓外圈端部厚度C1和C2
C1和C2分別為C1s和C2s的上限值(見表2、表3)。
規(guī)定C1和C2的值是為了使用中避免軸端面與沖壓外圈內(nèi)端面接觸。
未規(guī)定C1s和C2s的下限值。
GPS標(biāo)注見圖1b)。
6.3.3 倒角尺寸,r
倒角尺寸r為rs的下限值(見表2、表3)。
未規(guī)定倒角尺寸的上限值。
附錄A
(資料性附錄)
軸滾道和軸承座孔公差
A.1 總則
沖壓外圈滾針軸承能否正常工作與用戶所提供軸的質(zhì)量以及和被壓入質(zhì)量合適的軸承座的配合有關(guān)。軸承座應(yīng)具有足夠的強度以修正軸承的圓度和尺寸。
本附錄中給出了軸滾道和軸承座孔建議的公差和公差值。
圖中數(shù)值僅供參考,這些數(shù)值在某些特定的運轉(zhuǎn)條件和特性下可能不適用。如有疑問,可向軸承制造商咨詢具體建議。
A.2 滾道硬度和淬硬層深度
軸滾道淬硬并精磨。表面硬度最低670 HV(58HRC)。滾道的最小淬硬層深度為0.3mm~0.8mm,最小淬硬層深度取決于軸承尺寸、滾動體直徑、軸的熱處理工藝和載荷條件。如有疑問,可向軸承制造商咨詢具體建議。
注:淬硬層深度的定義按ISO 2639:2002[5],3.1。
A.3 符號
下列符號適用于本附錄。
D1:軸承座孔公稱直徑
d1:軸公稱直徑
A.4 軸滾道和軸承座孔結(jié)構(gòu)
圖A.1給出了軸滾道和軸承座孔公差的建議值。
公差適用于固定的軸承座和旋轉(zhuǎn)軸,若軸承座旋轉(zhuǎn),可向軸承制造商咨詢具體建議。圖A.1中與公稱直徑相關(guān)的標(biāo)準(zhǔn)公差等級(IT3和IT5)數(shù)值及公差等級(h6或N6)的極限偏差值按ISO 286-1[1]的規(guī)定。
說明:
1——軸的公稱直徑d1(=Fw);
2——軸承座孔的公稱直徑D1(=D);
3——鋼或鑄鐵軸承座的公差等級為N6,輕金屬軸承座的公差等級為R6(見注2);
4——圓柱度按ISO 1101[3];
5——或 ;
6——或 。
注1:軸承座的建議值適用于與軸承裝配的表面。軸滾道的技術(shù)要求適用于軸表面的功能性部分。
注2:其他材料軸承座結(jié)構(gòu)的具體建議可向軸承制造商咨詢。
圖A.1 軸和軸承座結(jié)構(gòu)
參考文獻
[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