GB/Z 32332.1-2015Rolling bearings - Explanatory notes on ISO 281 - Part 1: Basic dynamic load rating and basic rating life (English PDF)

Foreword

GB /Z 32332 "Rolling on ISO 281 Notes" is divided into the following two parts.

--- Part 1. Basic dynamic load rating and basic rated life;

--- Part 2. Amendment of rated life calculation based on fatigue stress system method.

This section GB /Z 32332 Part 1.

This section drafted in accordance with GB/T 1.1-2009 given rules.

This section uses the translation method is equivalent to using ISO /T R1281-1.2008 "Rolling Bearings ISO 281 Notes Part 1. Base The rated dynamic load and the basic rated life "and ISO /T R1281-1.2008/Cor.1.2009.

This section also made the following editorial changes.

--- Incorporate the content of International Standard Technical Corrigendum ISO /T R1281-1.2008/Cor.1.2009, ie delete Chapter 7.

Introduction

ISO /R281.1962 Calculation method of rated load of rolling bearings

Standardization issues The first discussion with international standards began with the International Organization for Standardization (ISA)

At the 1934 meeting, no progress was made when the ISA held its last meeting in 1939. However, ISA Fourth Secretariat in its 1945 The report on the standardization of rolling bearings includes a definition of the basic concept of rated load and life calculation. The report was made in 1949 Is issued as an ISO /TC4 (Secretariat-1) Document No. 1 and contains the definitions substantially as given in ISO 281:2007 for "Life" and "Base The rated dynamic load "concept.

At the initiative of the New York Friction Bearing Manufacturers Association (AFBMA) in 1946, discussions were held between the bearing industries in the United States and Sweden Set load and life calculation standard. Based primarily on the results listed in the literature [1], the AFBMA standard "radial ball bearings rated load Estimation Method "was finalized and released in 1949. On the same basis, Sweden submitted its first proposal to the ISO in February 1950 "Ball Bearing Rated Load" [File No. ISO /TC4/SC1 (Sweden-1) -1].

In view of the results of further studies and the revision of the AFBMA standard in 1950, as well as the concern about the rated load ratings of roller bearings, The Code submitted an amendment to the rated load on ball bearings [document ISO /TC4/SC1 (Sweden-6) 20] in 1951 and the amount of roller bearings Proposed fixed load [Document No. ISO /TC4/SC1 (Sweden-7) 21].

Later, between 1951 and 1959, ISO /TC4, ISO /TC4/SC1 and ISO /TC4/WG3 met at 11 different meetings On, discussed the rated load and life calculation method. Later, literature [2] became the main basis of the rated load part of the roller bearing.

At the 1956 TC4/WG3 meeting, the framework of the recommended standard was decided. At the same time, the United States considered the AFBMA standard The revised draft, ASAB3 (American Society of Mechanical Engineering 3) approved the revised standards. The United States submitted the standard to the conference, along with it The Secretariat's proposal was discussed in detail together. At the meeting, a proposal was made for Working Group III (WG3), which adopted the U.S. proposal Some parts.

In 1957, a draft recommendation based on the proposal of the Working Group was issued (Document No. TC4N145) and, at the WG3 meeting of the following year, The case was studied in detail and at a subsequent TC4 meeting it was decided to adopt TC4N145 with minor changes. Released in 1959 ISO Draft Recommendation No. 278 (Document No. TC4N188) was accepted by the ISO Committee as ISO /R281 in 1962.

ISO 281-1:1977

In 1964, Sweden proposed that in view of the development of bearing steels, the time was right to review ISO /R281 and submit proposals [ISO /TC4/WG 3 (Sweden-1) 9], but Working Group III (WG3) did not support the revision.

In 1969, TC4 adopted Japan's proposal (Document No. TC4N627) and reorganized Working Group 3 to amend WG3 ISO /R281 mission. At this point, the AFBMA's Load Rating Working Group has started the revision. In 1970, the United States submitted AFBMA draft standard "Ball Bearings Rated Load and Fatigue Life" [Doc. ISO /TC4/WG3 (USA - 1) 11]; submitted in 1971 "Roller bearing rated load and fatigue life" [document number ISO /TC4/WG3 (USA -3) 19], for reference.

In 1972 TC4/WG3 was reorganized into the eighth subcommittee (TC4/SC8). The U.S. proposal was conducted five times between 1971 and 1974 The meeting conducted a detailed discussion. The third draft recommendation and the final proposal (Document No. TC4/SC8N23) were revised in 1976 As a draft international standard issued a comment, and in 1977 became ISO 281-1:1977.

ISO 281-1:1977 is basically a reprint of ISO /R281 with only a few substantive changes, mainly based on the 20th century The 1960s study added a new chapter on the rated life at 90% reliability and on the material and operating conditions Correction of rated life.

Supplementary background information on the derivation of formulas and coefficients in ISO 281-1:1977 was initially proposed as an ISO 281-2 "Annotation Note" on Released in 1979, but later TC4/SC8 and TC4 decided to publish in the form of technical reports, namely ISO /T R8646.1985.

1 Scope

This part of GB /Z 32332 gives supplementary background information derived from the formulas and coefficients given in ISO 281:2007.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 6391-2010 Rolling bearings, rated dynamic load and rated life (ISO 281:2007, IDT)

3 Symbol

The following symbols apply to this document.