1、BRITISH STANDARD BS EN 28206:1992 ISO8206:1991 Acceptance tests for oxygen cutting machines Reproducible accuracy Operational characteristics The European Standard EN28206:1992 has the status of a BritishStandard UDC 621.791.945.001.4:62-187BSEN28206:1992 This BritishStandard, having been prepared u
2、nder the directionof the Welding Standards Policy Committee, waspublished under the authorityof the Standards Boardand comes into effect on 15October1992 BSI01-2000 The following BSI references relate to the work on this standard: Committee reference WEE/18 Draft for comment90/76247DC ISBN 0 580 212
3、43 2 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation
4、Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland National Standards Authority of Ire
5、land Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de Normalizacin y Certificacin Sweden Standardiserings
6、kommissionen i Sverige Switzerland Association suisse de normalisation UnitedKingdom BritishStandards Institution Amendments issued since publication Amd. No. Date CommentsBSEN28206:1992 BSI 01-2000 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of
7、EN28206 3 National annex NA (informative) Committees responsible Inside back coverBSEN28206:1992 ii BSI 01-2000 National foreword This BritishStandard has been prepared under the direction of the Welding Standards Policy Committee and is the English language version of EN28206:1992 Acceptance tests
8、for oxygen cutting machines Reproducible accuracy Operational characteristics, published by the European Committee for Standardization (CEN). EN28206:1992 is identical with ISO8206:1991 published by the International Organization for Standardization (ISO). EN28206:1992 was produced as a result of in
9、ternational discussion in which the UK took an active part. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from
10、legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theEN title page, pages2 to 16, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated
11、in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN28206 July1992 UDC 621.791.945.001.4:62-187 Descriptors: Oxygen cutting, cutting machine, acceptance testing, reproductibility, fidelity, performance evaluation, tests, delivery condition English ver
12、sion Acceptance tests for oxygen cutting machines Reproducible accuracy Operational characteristics (ISO8206:1991) Contrle de rception des machines doxycoupage Prcision de production Caractristiques de fonctionnement (ISO8206:1991) Abnahmeprfugen fr Brennschneidmaschinen Nachfhrgenauigkeit Funktions
13、eigenschaften (ISO8206:1991) This European Standard was approved by CEN on1992-07-03. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists
14、and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsi
15、bility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, P
16、ortugal, Spain, Sweden, Switzerland and UnitedKingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1992 Copyright reserved to CEN members Ref. No. EN28206:1992 EEN28206:1992 BSI 01-2
17、000 2 Foreword IN1991 CEN Technical Committee CEN/TC121 “Welding” decided to submit ISO8206:1991 “Acceptance tests for oxygen cutting machines Reproducible accuracy Operational characteristics” to the Unique Acceptance Procedure. The result was positive. National standards identical to this European
18、 Standard shall be published at the latest by1993-01-31 and conflicting national standards shall be withdrawn at the latest by1993-01-31. According to the CEN/CENELEC Common Rules, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germ
19、any, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. Contents Page Foreword 2 1 Scope 3 2 Purpose of acceptance tests 3 3 Preconditions for acceptance tests 3 3.1 Setting up the oxygen cutting machine 3 3.2 Time of acceptance
20、tests 3 4 Principles of acceptance tests 3 4.1 Operating instructions 3 4.2 Measuring instruments 3 4.3 Measurements 3 4.4 Test report 3 5 Extent of acceptance tests 3 5.1 Testing of the running track 3 5.2 Testing of the manufacturing accuracy oftheoxygen cutting machine 3 5.3 Testing of the workin
21、g accuracy of automatically controlled oxygen cutting machines 3 5.4 Testing of the working accuracy of planing machines 3 5.5 Electrical equipment 3 5.6 Gas engineering equipment 3 Annex A (informative) Test report on acceptancetest of oxygen cutting machineinaccordance with ISO8206 11 Table 1 Test
22、ing of the running track 4 Table 2 Testing of the manufacturing accuracyofthe oxygen cutting machine 6 Table 3 Testing of the working accuracyofautomatically controlled oxygencuttingmachines 6 Table 4 Testing of the working accuracyofplaning machines 10EN28206:1992 BSI 01-2000 3 1 Scope This Interna
23、tional Standard applies to stationary cross-carriage oxygen cutting machines for shape cutting and/or parallel trimming. It also applies to machines for cutting by other thermal processes. 2 Purpose of acceptance tests The purpose of acceptance tests is the final inspection of the completed oxygen c
24、utting machine on the premises of the user. Acceptance tests are used solely to demonstrate the reproducible accuracy and operational characteristics of the oxygen cutting machine, eliminating influences caused by the process. This International Standard is intended to be a basis for technical provi
25、sions of delivery. 3 Preconditions for acceptance tests 3.1 Setting up the oxygen cutting machine Oxygen cutting machines are machine tools. At the place of installation, therefore, the same requirements as regards sensitivity to external influences shall be established as in the case of other machi
26、ne tools. Installation of the oxygen cutting machine outdoors, laying out the machine foundations in the vicinity of vibrating plant, and effects from electric or electromagnetic fields are to be avoided. Displacement or subsidence of the machine foundations shall be excluded. Exceptions shall be st
27、ipulated in agreement with the manufacturer. 3.2 Time of acceptance tests The machine parts shall be properly stored on the users premises. The oxygen cutting machine shall be properly installed immediately on delivery and tested in accordance with clause5. 4 Principles of acceptance tests 4.1 Opera
28、ting instructions The operating instructions for the oxygen cutting machine shall be complied with. Before commencing the acceptance tests the controls, electronics, motors and gear mechanisms shall be operated at no-load to bring them to a temperature corresponding to working conditions and the man
29、ufacturers instructions. 4.2 Measuring instruments The tests are to be carried out with calibrated measuring instruments in accordance with the measuring instructions given in this International Standard. The limit of error of the measuring instruments shall not be more than20% of the permissible va
30、riation. The errors in the measuring instruments and the tolerances for the measuring devices, e.g.set pins, steel wire and prism blocks are to be taken into account. 4.3 Measurements The measuring instruments, measuring devices and oxygen cutting machine, with the exception of the parts referred to
31、 in4.1, are to be brought to the same temperature generally room temperature. They shall therefore, be protected against sunlight and external thermal influences. Should there be any discrepancy, a control measurement is to be carried out after testing the measuring instruments and the measuring dev
32、ices. 4.4 Test report The test results are to be recorded in a report (seeAnnex A). Additional tests of the manufacturing or working accuracy can be agreed at the time of ordering. 5 Extent of acceptance tests 5.1 Testing of the running track The accuracy of manufacture and installation of the runni
33、ng track is tested with the cross-carriage positioned on it in accordance with Table 1. 5.2 Testing of the manufacturing accuracy of the oxygen cutting machine The criteria for this are given in Table 2. 5.3 Testing of the working accuracy of automatically controlled oxygen cutting machines The work
34、ing accuracy of automatically controlled oxygen cutting machines is tested in accordance with Table 3. 5.4 Testing of the working accuracy of planing machines The working accuracy of planing machines is tested in accordance with Table 4. 5.5 Electrical equipment The electrical operations are tested
35、in accordance with the operating instructions. The relevant IEC publications shall be complied with. 5.6 Gas engineering equipment Pressure measurements are taken to test whether the pipes have a large enough cross-section to ensure that the gas supply equipment can operate efficiently.EN28206:1992
36、4 BSI 01-2000 The pressures of combustible gas and oxygen for heating and cutting required in accordance with the operating chart for the greatest thicknesses of workpieces shall be available at the torch inlet while all the torches are in operation which have been provided in accordance with the or
37、der for simultaneous oxygen cutting of such thicknesses of workpieces. Testing is to be carried out for compliance with the safety requirements, observing the accident prevention regulations and other relevant regulations. Table 1 Testing of the running track No. Object of measurement Figure Measuri
38、ng instrument Measuring instructions Permissible variation 5.1.1 Straightness of guide rail Steel wire max.0,5mm , end gauges (setpins), feeler gauge, levelling telescope Move cross-carriage torear end of running track. Carry the steel wire along the free part of the guide rail over the set pins and
39、 tension. Measure with set pins and feeler gauge at intervals of1m. Then move cross-carriage to the front end of the running track. Repeat measurement as before. Gauge length is at least twice the dead length of the machine 0,2mm to10m length 5.1.2 Horizontal position of guide rail longitudinally an
40、d transversely Spirit level with 0,1mm/m scale interval, levelling instrument with coincidence bubble Apply spirit level at intervals of1m along and across the rail surfaces. Attach prism block if necessary for prismatic rails 0,2mm/m longitudinally but not more than 2mm on running track lengths of
41、up to50m, 0,1mm/m transverselyEN28206:1992 BSI 01-2000 5Table 1 Testing of the running track No. Object of measurement Figure Measuring instrument Measuring instructions Permissible variation 5.1.3 Straightness of running rail Steel wire max.0,5mm , end gauges (setpins), feeler gauge, levelling tele
42、scope Move cross-carriage to rear end of running track. Carry the steel wire along the free part of the running rail over the set pins and tension. Measure with set pins and feeler gauge at intervals of1m. Then move cross-carriage to the front end of the running track. Repeat measurement as before.
43、Gauge length is at least twice the dead length of the machine For rails machined laterally 0,5 mm upto a length of20m, for rails not machined laterally 3mm up to a length of20m 5.1.4 Horizontal position of running rail longitudinally and transversely Spirit level with 0,1mm/m scale interval, levelli
44、ng instrument with coincidence bubble Apply spirit level at intervals of1m along and across the rail surfaces. Attach prism block if necessary for prismatic rails 0,2mm/m longitudinally and transversely but not more than 2mm over total length of running track 5.1.5 Horizontal position of guide rail
45、and running rail in relation to each other Hose level with 0,1mm/m scale interval, levelling instrument, levelling telescope Measure at the start, middle and end of the running track 0,5mm to10m track width, 1mm for track widths10m 5.1.6 Parallelism of guide rail and running rail in relation to each
46、 other Steel measuring tape Measure at the start, middle and end of the running track. The distance between the guide rail and running rail the track gauge shall be maintained according to the manufacturers assembly plan No limitation, but running wheel shall be fully supported over the total length
47、EN28206:1992 6 BSI 01-2000 Table 2 Testing of the manufacturing accuracy of the oxygen cutting machine Table 3 Testing of the working accuracy of automatically controlled oxygencuttingmachines No. Object of measurement Figure Measuring instrument Measuring instructions Required variation 5.2.1 Strok
48、e of torch height adjustment Steel measuring tape Travel torch height slides to highest and lowest position. Compare with dimensions on manufacturers assembly plan At least 3mm higher and lower than nominal dimension 5.2.2 Working width in the range of control device and cutting torch Steel measurin
49、g tape Move control device or cutting torch to inner and outer position. Measure distance of travel and compare with manufacturers machine assembly plan At least 10mm wider than nominal dimension a 5.2.3 Working length Steel measuring tape Move cross-carriage to forward and rear position. Measure distance of travel and compare with the manufacturers machine assembly plan At least 20mm longer than nominal dimension a a The minimum variations are required in order to be able to align the la
