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1、Reference number ISO 14744-1:2000(E) ISO 2000 INTERNATIONAL STANDARD ISO 14744-1 First edition 2000-04-15 Welding Acceptance inspection of electron beam welding machines Part 1: Principles and acceptance conditions Soudage Essais de rception des machines de soudage par faisceau dlectrons Partie 1: P
2、rincipes et conditions de rception Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:00:44 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14744-1:
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6、. ISO 2000 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in
7、 the country of the requester. ISO copyright office Case postale 56?CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 734 10 79 E-mail copyrightiso.ch Web www.iso.ch Printed in Switzerland ii ISO 2000 All rights reserved Copyright International Organization for Standardization Provided by IHS und
8、er license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:00:44 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14744-1:2000(E) ISO 2000 All rights reservediii Foreword ISO (the International Organization for Standardization) is a
9、worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented
10、 on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are draft
11、ed in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of member bodies casting a vote. Atte
12、ntion is drawn to the possibility that some of the elements of this part of ISO 14744 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 14744-1 was prepared by the European Committee for Standardization (C
13、EN) in collaboration with ISO Technical Committee TC 44,Welding and allied processes, Subcommittee SC 10,Unification of requirements in the field of metal welding, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement). Throughout the text of this standard,
14、read “.this European Standard.“ to mean “.this International Standard.“. ISO 14744 consists of the following parts, under the general titleWelding Acceptance inspection of electron beam welding machines: Part 1: Principles and acceptance conditions Part 2: Measurement of accelerating voltage charact
15、eristics Part 3: Measurement of beam current characteristics Part 4: Measurement of welding speed Part 5: Measurement of run-out accuracy Part 6: Measurement of stability of spot position Annexes A and B of this part of ISO 14744 are for information only. Copyright International Organization for Sta
16、ndardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:00:44 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14744-1:2000(E) iv ISO 2000 All rights reserved Contents Page Foreword .v Introduction
17、vi 1Scope .1 2Normative references 1 3Symbols 1 4Conditions for acceptance inspection 2 4.1 General.2 4.2 Installation of electron beam welding machine.2 4.3 Power source.2 4.4 Safety precautions.2 4.5 Operating instructions3 4.6 Instruments3 5Principles of acceptance inspection .3 5.1 Setting range
18、3 5.2 Normal acceptance3 5.3 Limited or more extensive acceptance inspection4 5.4 Record of inspection results4 6Acceptance inspection 5 6.1 General.5 6.2 Accelerating voltage, beam current and lens current5 6.3 Welding speed.5 6.4 Run-out accuracy.6 6.5 Stability of spot position.6 7Supplementary a
19、cceptance inspections .6 Annex A (informative) Procedures for inspection of pressure rise rate and leak rate.7 Annex B (informative) Specification of a weld test of penetration deviation.8 Bibliography9 Copyright International Organization for Standardization Provided by IHS under license with ISO L
20、icensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:00:44 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14744-1:2000(E) ISO 2000 All rights reservedv Foreword The text of EN ISO 14744-1:2000 has been prepared by Technical Committee CEN/TC 121 “
21、Welding“, the secretariat of which is held by DS, in collaboration with Technical Committee ISO/TC 44 “Welding and allied processes“. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2000,
22、and conflicting national standards shall be withdrawn at the latest by October 2000. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, F
23、rance, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. This draft European Standard is composed of the six following parts: Part 1: Principles and acceptance conditions; Part 2: Measurement of accelerating voltag
24、e characteristics; Part 3: Measurement of beam current characteristics; Part 4: Measurement of welding speed; Part 5: Measurement of run-out accuracy; Part 6: Measurement of stability of spot position. Copyright International Organization for Standardization Provided by IHS under license with ISO Li
25、censee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:00:44 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14744-1:2000(E) vi ISO 2000 All rights reserved Introduction Components, failure of which will endanger life, are subject to comprehensive te
26、st and acceptance specifications, which, among other things, require production equipment to be of proven type and in accordance with the state of the art. Similarly, in welding practice, standards apply that specify, for example, the required manual skills which a welder must have for controlling t
27、he weld. In welding processes that are not under direct manual control, such as in electron beam welding, requirements for various machine parameters are established. This standard series on acceptance inspection of electron beam welding machines is based on the concept that the production of contin
28、uously high-quality welds is ensured if, among other things, the settings, within defined limits, are reproducible during the operating period. Taking this into account, this standard specifies details of the main machine parameters (accelerating voltage, beam current, lens current and welding speed
29、) together with deviations permitted in short-term or long-term operation. It also includes requirements regarding the run-out accuracy of the devices positioning the workpiece and regarding the stability of the spot position of the electron beam. Users, manufacturers, research experts and inspectio
30、n bodies are all agreed that electron beam welding machines complying with the requirements are suitable for welding components subject to acceptance inspection, such as aircraft equipment, pressure vessels, valves, etc., within specified setting ranges, assuming that other conditions (e.g. qualifie
31、d staff, quality control) are fulfilled. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:00:44 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 14
32、744-1:2000(E) ISO 2000 All rights reserved1 1 Scope The main purpose of this standard is to provide requirements for acceptance inspection of electron beam welding machines preferably when first installed on the users premises. This standard can (in full or in part) be referred to in contracts for s
33、upply of electron beam welding machines. Further tests are not normally required if proof of satisfactory welding results is provided in the form of routine inspection documentation. However, the requirements of the standard can also be used for inspection as part of maintenance, if required by cont
34、ract. If modifications are made to an electron beam welding machine (rebuilding, repairs, modification to the operating conditions etc.) such as may have an effect on the acceptance inspection, repeat tests can be necessary covering the machine parameters affected by such modifications. If a welding
35、 machine that has already been accepted is dismantled (e.g. in order to change its location), such tests would involve verification according to the requirements in clauses 4, 6.2 to 6.4 and 7. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from
36、other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment
37、 or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN ISO 14744-2 Welding Acceptance inspection of electron beam welding machines Part 2: Measurement of accelerating voltage caracteristics (ISO 14744-2 : 2000) EN ISO 14744-3 Welding
38、 Acceptance inspection of electron beam welding machines Part 3: Measurement of beam current caracteristics (ISO 14744-3 : 2000) EN ISO 14744-4 Welding Acceptance inspection of electron beam welding machines Part 4: Measurement of welding speed (ISO 14744-4 : 2000) EN ISO 14744-5 Welding Acceptance
39、inspection of electron beam welding machines Part 5: Measurement of run-out accuracy (ISO 14744-5 : 2000) EN ISO 14774-6:2000 Welding Acceptance inspection of electron beam welding machines Part 6: Measurement of stability of spot position (ISO 14744 : 2000) 3 Symbols For the purposes of this standa
40、rd, the following symbols apply: ax;ay;azdeviation of electron beam axis from weld groove centre or of beam focus from groove centre on weld surface inX,YorZdirection of feed, as a measure of the run-out accuracy, in mm; AWwork distance, in mm; AFfocal distance, in mm; Ddiameter of a circumference w
41、eld seam in mm or cm; ILlens current, in mA; Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:00:44 MDTNo reproduction or networking permitted without license from IHS -,-,- IS
42、O 14744-1:2000(E) 2 ISO 2000 All rights reserved IL maxlens current atUA maxand forAF min, in mA; IL minlens current atUA minand forAF max, in mA; IBbeam current, in mA; IB maxmaximum beam current, corresponding toUA maxandUA minrespectively, in mA; mloading of work table or of rotating fixture resu
43、lting from workpiece mass including that of any clamping device, in kg; nspeed of rotating fixture, in min-1; UAindicated accelerating voltage, in kV; UA maxmaximum indicated accelerating voltage within the setting range, in kV; UA minminimum indicated accelerating voltage within the setting range,
44、in kV; Uamonitored voltage for measuring the accelerating voltage, in mV; Ubmonitored voltage for measuring the beam current, in mV; Uvmonitored voltage for measuring the welding speed, in mV; vwelding speed, in mm/s, cm/min or m/min; Qpressure rise rate, in Pa?dm3/s, or mbar?l/s 4 Conditions for ac
45、ceptance inspection 4.1 General Acceptance inspection shall be performed after installation of the welding machine, prior to production. However, measurement of accelerating voltage may be performed prior to delivery of the welding machine in accordance with EN ISO 14744-2. 4.2 Installation of elect
46、ron beam welding machine Electron beam welding machines shall be installed so that acceptance inspection and machine performance are not interfered with by vibration or by electrical or magnetic fields. 4.3 Power source The power source for electron beam welding machines shall be an electrical mains
47、 system with voltage fluctuations not exceeding 10 %. 4.4 Safety precautions This standard does not cover inspection of safety devices and other safety aspects. NOTE Machines for electron beam welding have several features which assure safe operation. The electron beam generates X-rays during weldin
48、g and the work chamber walls, the work chamber windows and other parts have to reduce the radiation outside the machine to low safe levels so as to permit operators and other personnel to work safely close to the machine. The parts of the machine subject to high-voltages should, of course, be protected and inaccessible when under high tension. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/