ASD-STAN TR 4541-2008 Aerospace series Instruction for the installation by staking of aerospace bearings《航空航天系列 航空航天用轴承的铆合法安装说明 第1版》.pdf
《ASD-STAN TR 4541-2008 Aerospace series Instruction for the installation by staking of aerospace bearings《航空航天系列 航空航天用轴承的铆合法安装说明 第1版》.pdf》由会员分享,可在线阅读,更多相关《ASD-STAN TR 4541-2008 Aerospace series Instruction for the installation by staking of aerospace bearings《航空航天系列 航空航天用轴承的铆合法安装说明 第1版》.pdf(36页珍藏版)》请在麦多课文档分享上搜索。
1、ASD Technical Report Rapport Technique ASD ASD Fachbericht TR 4541 Edition 1 April 2008 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATION Avenue de Tervuren, 270 - B-1150 Brussels - Tel. + 32 2 775 8126 - Fax. + 32 2 763 3565 - www.asd-stan.orgICS: Descriptors
2、: ENGLISH VERSION Aerospace series Instruction for the installation by staking of aerospace bearings Srie arospatiale Instructions relatives au montage par sertissage des articulations, roulements et rotules Luft- und Raumfahrt Vorschrift fr den Einbau von Flugwerklagern mittels Verstemmen This Tech
3、nical report was drawn up by ASD-STAN in cooperation with ASD-CERT. The reason which led to the publication of the document as a Technical Report is explained in the foreword. Edition approved for publication 2008-04-30 Copyright 2008 by ASD-STANPage 2 TR 4541:08-04 Contents Page Foreword3 1 Introdu
4、ction4 1.1 Scope 4 1.2 Methods of staking 4 2 Normative references 4 3 General information.5 3.1 Terms and definitions .5 3.2 Installation with clearance (and transition fit) 5 4 Tolerances between housings and bearings5 4.1 General5 4.2 Installation with interference fit5 4.3 Housing material stren
5、gth 6 5 Staking process .6 5.1 Fastening by means groove deformation on chamfer.6 5.2 Fastening by means locking bush 11 6 Staking process description 12 6.1 Staking by static pressure . 12 6.2 Roller staking 20 6.3 Segment staking . 22 6.4 Ball staking 24 6.5 Locking bush staking, bushes with or wi
6、thout grooves 25 6.6 Locking bush staking, bushes with collar or tab 29 7 Removal of spherical bearings 30 7.1 General. 30 7.2 Bearing with grooves . 30 7.3 Bearing staked by deformation of the groove of the housing . 32 7.4 Bearing staked by locking bush 32 7.5 Bearing extraction 33 8 Synthesis of
7、different staking method . 34 Page 3 TR 4541:08-04 Foreword The main task of ASD-STAN is to prepare EN standards. In exceptional circumstances, however, the publication of a Technical Report of one of the following types may be proposed: type 1, the subject is still under technical development requi
8、ring wider exposure; type 2, a Technical Domain has collected data of a different kind from that which is normally published as a European Standard. The Mechanical Domain decided to publish this document in the form of a Technical Report of type 2, as it contains only general guidelines. Technical R
9、eports are normally published in a trilingual version. Due to the volume of this document, the report is published, as an exception, in three separate language versions. Page 4 TR 4541:08-04 1 Introduction 1.1 Scope This Technical Report specifies the different types of installation of spherical bea
10、rings and rolling bearings which use various staking methods. Other installation methods are not covered by this Technical Report (bonded bearings, other mechanical restraint ). 1.2 Methods of staking Fastening by means of groove deformation on chamfer; Fastening by means of roller staking; Fastenin
11、g by means of segment staking; Fastening by means of ball staking tool; Fastening by means of locking bush; Fastening by means of locking bush with collar or tab staking. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated refer
12、ences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 6055, Aerospace series Rod-ends with bearings per EN 4265, in corrosion resisting steel, external threaded shank Dimensions and loads, inch series. 1)EN
13、 6056, Aerospace series Rod-ends with bearings per EN 4614, with self-lubricating liner, in corrosion resisting steel, external threaded shank Dimensions and loads, inch series. 1) EN 6057, Aerospace series Rod-ends with bearings per EN 4265, in corrosion resisting steel, internal threaded shank Dim
14、ensions and loads, inch series. 1)EN 6098, Aerospace series Rod-ends with bearings per EN 6097, in corrosion resisting steel, extra wide inner ring, external threaded shank Dimensions and loads, inch series. 1)TR 4475, Aerospace series Bearings and mechanical transmissions for airframe applications
15、Vocabulary. 2)MIL-HDBK-1599A, Bearings, control system components and associated hardware used in the design and construction of aerospace mechanical systems and subsystems. 3)1) In preparation at the date of publication of this ASD Technical Report 2) Published as ASD Technical Report at the date o
16、f publication of this AECMA Technical Report 3) Published by: Department of Defense (DOD), the Pentagon, Washington, D.C. 20301. Page 5 TR 4541:08-04 3 General information 3.1 Terms and definitions For the purposes of this document, the terms and definitions given in TR 4475 apply. 3.2 Installation
17、with clearance (and transition fit) Most bearings using these types of fit are defined by standards. Dimensions and tolerance are reported in the standards or in the manufacturers specification. 4 Tolerances between housings and bearings 4.1 General The tolerances of the mating parts are agreed betw
18、een manufacturer and user. 4.2 Installation with interference fit 4.2.1 Introduction This type of installation is applied when resistance to fatigue is required. In those cases of installation with interference fit, the allowable range of interference must be defined by a specification issued by the
19、 user or by the manufacturer. 4.2.2 Interference check The interference must be computed by measuring the actual dimensions of each bearing and housing pair. 4.2.3 Installation with light interference fit The interference value must be lower than the radial play of the bearing in installation with i
20、nterference fit (ball bearings, spherical bearings metal/metal), in order to prevent seizures, distortion or high friction. 4.2.4 Friction torque modification before and after staking of self lubricated spherical plain bearings The friction torque changes with the staking load as shown in Figure 1 a
21、nd of the interference. The staking process is correct if the final friction torque value is lower than twice the value measured before the installation (for light interference fitted bearings). Page 6 TR 4541:08-04 Key A Maximum friction torque value allowed for a correct installation B Friction to
22、rque value before the installation P Staking load T Friction-torque Figure 1 Example of friction torque change 4.3 Housing material strength The material strength of housing must be considered in installations with grooves in the bearings. 5 Staking process Several staking procedures may be applied.
23、 The selection of the most suitable procedure is made on the basis of the shape (with or without grooves) of the bearing and of the material both of the bearing and the housing. Also the same procedure may be applied in a different way from one user to another. Some users apply different staking pro
24、cedures according to the bearing and housing materials. 5.1 Fastening by means groove deformation on chamfer 5.1.1 Staking by static pressure deformation The staking of bearing in its housing is obtained by upper and lower anvils which press out the lips of the groove by their shape. The characteris
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