BS PD ISO TS 18684-2015 Timekeeping instruments Watch external parts made of hard materials General requirements and test methods《计时仪器 由硬质材料制成的手表外部零件 通用要求和试验方法》.pdf

1、BSI Standards Publication Timekeeping instruments Watch external parts made of hard materials General requirements and test methods PD ISO/TS 18684:2015National foreword This Published Document is the UK implementation of ISO/TS 18684:2015. The UK participation in its preparation was entrusted to Te

2、chnical Committee STI/53, Specifications and test methods for jewellery and horology. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for

3、its correct application. The British Standards Institution 2015. Published by BSI Standards Limited 2015 ISBN 978 0 580 83506 3 ICS 39.040.10 Compliance with a British Standard cannot confer immunity from legal obligations. This Published Document was published under the authority of the Standards P

4、olicy and Strategy Committee on 31 October 2015. Amendments/corrigenda issued since publication Date Text affected PUBLISHED DOCUMENT PD ISO/TS 18684:2015 ISO 2015 Timekeeping instruments Watch external parts made of hard materials General requirements and test methods Instruments horaires Habillage

5、s de montre en matriaux durs Exigences gnrales et mthodes dessais TECHNICAL SPECIFICATION ISO/TS 18684 Reference number ISO/TS 18684:2015(E) First edition 2015-09-01 PD ISO/TS 18684:2015 ISO/TS 18684:2015(E)ii ISO 2015 All rights reserved COPYRIGHT PROTECTED DOCUMENT ISO 2015, Published in Switzerla

6、nd All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be reques

7、ted from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyrightiso.org www.iso.org PD ISO/TS 18684:2015 ISO/TS 18684:2015(E)Foreword

8、 iv Introduction v 1 Scope . 1 2 Normative references 1 3 T erms and definitions . 1 4 Requirements, method of control and acceptance criteria 2 4.1 General . 2 4.2 Mechanical shock resistance . 2 4.2.1 Requirements and control method 2 4.2.2 Acceptance criteria 2 4.3 Thermal shock resistance 3 4.3.

9、1 Requirements and control method 3 4.3.2 Acceptance criteria 3 4.4 Corrosion resistance 3 4.4.1 Requirements and control method 3 4.4.2 Acceptance criteria 3 4.5 Wear resistance 3 4.5.1 Requirements and control method 3 4.5.2 Acceptance criteria 3 4.6 Scratch resistance . 3 4.6.1 Requirements and c

10、ontrol method 3 4.6.2 Acceptance criteria 4 4.7 Impact resistance 4 4.7.1 Requirements and control method 4 4.7.2 Acceptance criteria 4 4.8 Sunlight resistance 4 4.8.1 Requirements and control method 4 4.8.2 Acceptance criteria 4 4.9 Mechanical behaviour of assembled elements 4 4.9.1 Requirements an

11、d control method 4 4.9.2 Acceptance criteria 5 Annex A (informative) Hard materials . 6 Annex B (informative) Inspection rules 7 Bibliography 8 ISO 2015 All rights reserved iii Contents Page PD ISO/TS 18684:2015 ISO/TS 18684:2015(E) Foreword ISO (the International Organization for Standardization) i

12、s a 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 represe

13、nted 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. The procedures used to develo

14、p this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/I

15、EC Directives, Part 2. www.iso.org/directives Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the deve

16、lopment of the document will be in the Introduction and/or on the ISO list of patent declarations received. www.iso.org/patents Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the meaning of ISO spec

17、ific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT), see the following URL: Foreword - Supplementary information The committee responsible for this document is ISO/TC 114, Horology.iv

18、ISO 2015 All rights reserved PD ISO/TS 18684:2015 ISO/TS 18684:2015(E) Introduction In recent years, hard materials such as tungsten carbide, ceramics, etc., have found several applications in the horological industry, particularly for the external parts of watches, and more particularly in watchcas

19、es and some of their accessories such as bezels, crowns, wristbands and clasps. Their properties in terms of hardness, of wear resistance or of finish quality (brightness) bring many undeniable advantages for this type of application. This Technical Specification deals with constitutive components o

20、f external parts of watches. Given the variety of possibilities in the mounting of these elements, it is not possible to define and to specify “a complete watch made of hard material”. Manufacturers of hard materials have developed know-how with the aim of satisfying the legal requirements and the c

21、riteria of horological standardization, without standards nor specifications that can serve as references. The aim of this Technical Specification is to clarify the general requirements and the test methods for the horological external parts made of hard material. ISO 2015 All rights reserved v PD I

22、SO/TS 18684:2015 Timekeeping instruments Watch external parts made of hard materials General requirements and test methods 1 Scope This Technical Specification concerns whole watches, in which all or some of the components of the external parts are made of hard material, with the exception of watch

23、glasses. It applies to all elements made in massive material whose hardness is greater than or equal to 1 200 Vickers. It describes the performance in terms of resistance to mechanical and thermal shocks, to corrosion, to scratches, to sunlight exposure and also to the wear of its components. 2 Norm

24、ative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments)

25、 applies. ISO 1413: 1) , Horology Shock-resistant watches ISO 9227, Corrosion tests in artificial atmospheres Salt spray tests ISO 23160:2011, Watch cases and accessories Tests of the resistance to wear, scratching and impacts SN 289 120:2013, Definition of linear types shocks for the wristwatches c

26、omponents SN 289 650:2013, Process to estimate the resistance to chemical and climatic agents of a horological external part 3 T erms a nd definiti ons For the purposes of this document, the following terms and definitions apply. 3.1 external partthe watchcase, the bezel, the crown, the push buttons

27、, the wristband and the clasp 3.2 hard material material whose Vickers hardness is equal to or higher than 1 200 HV1 3.3 massivehaving a composition that is macroscopically homogeneous across its entire section 3.4 brittlenesssusceptibility to breaking, under the effect of a static or dynamic stress

28、, without being significantly plastically deformed 1) To be published. Revises ISO 1413:1984. TECHNICAL SPECIFICATION ISO/TS 18684:2015(E) ISO 2015 All rights reserved 1 PD ISO/TS 18684:2015 ISO/TS 18684:2015(E) 4 Requirements, method of control and acceptance criteria 4.1 General The requirements o

29、f this Technical Specification apply to the elements of external parts of watches made in hard and massive material, according to the definitions of Clause 3. It shall be noted that these materials may contain allergens or toxic materials such as Nickel or Cobalt. Their amounts and effects must impe

30、ratively stay within the specified limits of standards and regulations relative to consumers protection. The watch external parts made of hard material shall not present any shape which may be harmful for the user. The control method and the acceptance criteria of these materials, constituting the p

31、rerequisites, are reported in Annex A. In the case of tests involving mechanical solicitations (see 4.2, 4.7 and 4.8), the number of samples to be tested shall be sufficient to include the usually large dispersion of measurement inherent to this type of brittle materials. A statistical approach shou

32、ld be adopted. It is possible to apply all the tests or a selection of them to assemblies or to certain individual components. The definition of which components are to be tested and the test conditions to be achieved shall be given special attention in advance in order to highlight those parts that

33、 are typically sensitive under conditions of ordinary use. In the case of hard materials that are additionally coated, the surface-related tests should be interpreted differently (wear, scratches, hardness, etc.). The existence of porosity is admitted as long as the requirements below are fulfilled.

34、 4.2 Mechanical shock resistance 4.2.1 Requirements and control method The purpose of this test is to verify the mechanical behaviour of the tested elements or assemblies. The external elements of watches made of hard material shall comply with the specific requirements of the following standards: I

35、SO 1413:, 5.3. However, the height to be used shall be 0,75 m because of the lower shock resistance of hard materials, of which the consumer should be made aware; SN 289 120:2013, Chapters 7 and 8. It is up to the producer to define the minimum requirements in terms of degree of severity, according

36、to the table in Chapter 5 which refers exclusively to the complete product. 4.2.2 Acceptance criteria The examination of the elements made of hard material shall not reveal any permanent deterioration affecting its functions, its performance or its appearance (flaws or broken components). The examin

37、ation of the wristband shall not reveal any failure and not present any loss of components. The assembly of the watch head, the wristband and its functional elements (clasp, loop, etc.) shall stay functional.2 ISO 2015 All rights reserved PD ISO/TS 18684:2015 ISO/TS 18684:2015(E) 4.3 Thermal shock r

38、esistance 4.3.1 Requirements and control method The purpose of this test is to evaluate the behaviour of assemblies containing at least one element made of hard material. The elements of external parts of watches made of hard material shall meet the specific requirements according to the methods des

39、cribed in SN 289 650:2013, Chapter 6.6 4.3.2 Acceptance criteria No visible degradation shall be observed on the components or assembly tested. 4.4 Corrosion resistance 4.4.1 Requirements and control method The purpose of this test is to evaluate hard material elements or assemblies against corrosiv

40、e agents. The elements of external parts of watches made of hard material shall meet the specific requirements of ISO 9227 and SN 289 650:2013, particularly concerning the following tests: ISO 9227, (Neutral salt spray test); SN 289 650:2013, Chapter 6.2, (Synthetic sweat test). 4.4.2 Acceptance cri

41、teria No visible degradation shall be observed on the components or assembly tested. 4.5 Wear resistance 4.5.1 Requirements and control method The purpose of this test is to evaluate the potential degradation of the element made of hard material due to random wear. The elements of external parts of

42、watches made of hard material shall meet the specific requirements of ISO 23160:2011, 4.1 (Wear resistance). 4.5.2 Acceptance criteria According to ISO 23160:2011, 4.1.6 (Evaluation of results). NOTE The wear resistance shall be high due to customers expectations. 4.6 Scratch resistance 4.6.1 Requir

43、ements and control method The purpose of this test is to evaluate the potential degradation of the element made of hard material. Due to customers expectations, the abrasive load shall be adapted in order to provide more discriminating tests than those described in ISO 23160:2011, 5.3). The elements

44、 of external parts of watches made of hard material shall meet the specific requirements of the ISO 23160:2011, 5.2, 5.3 and 5.4 (Scratch resistance), using sharp edge alumina abrasive (Corundum F70), see Table 1. ISO 2015 All rights reserved 3 PD ISO/TS 18684:2015 ISO/TS 18684:2015(E) Table 1 Chara

45、cteristics of the Corundum F70 Particle size Indicative density Hardness Composition Dv 0,5210 m 3,96 g/cm 3 1900 HV 100 HV Al 2 O 3 4.6.2 Acceptance criteria According to ISO 23160:2011, 5.6 (Evaluation of results). NOTE The scratch resistance shall be high due to customers expectations. 4.7 Impact

46、 resistance 4.7.1 Requirements and control method The purpose of this test is to evaluate the impact resistance of a watch head and its bracelet when exposed to accidental friction against rough, hard and abrasive surfaces. The elements of external parts of watches made of hard material shall meet t

47、he specific requirements of ISO 23160:2011, 6.2, 6.3 and 6.4 (Impact resistance), particularly regarding impacts, accidental falls, and shocks in luggage/handbags. 4.7.2 Acceptance criteria According to ISO 23160:2011, 6.6 (Evaluation of results). 4.8 Sunlight resistance 4.8.1 Requirements and contr

48、ol method The purpose of this test is to verify the colour stability of elements made of hard material when exposed to sunlight. The elements of external parts of watches made of hard material shall meet the specific requirements of SN 289 650:2013, Chapter 6.3 (Artificial sunlight test) and more sp

49、ecifically concerning the following tests: Exposure of horological external parts to a light whose spectrum is close to the suns spectrum, with a controlled energetic illumination, a temperature higher than the normal wear conditions and in an atmosphere of controlled and determinate humidity. The control is made by comparison of the visual colour variation based on a reference sample. 4.8.2 Acceptance criteria No colour variation shall be visible at 30 cm with the naked eye. 4.9 Mechanical behaviour of ass