1、INTERNATIONAL STANDARD IEC 61029-2-4 1993 AMENDMENT 1 2001-05 Amendment 1 Safety of transportable motor-operated electric tools Part 2-4: Particular requirements for bench grinders Amendement 1 Scurit des machines-outils lectriques semi-fixes Partie 2-4: Rgles particulires pour les tourets meuler PR
2、ICE CODE IEC 2001 Copyright - all rights reserved International Electrotechnical Commission 3, rue de Varemb Geneva, Switzerland Telefax: +41 22 919 0300 e-mail: inmailiec.ch IEC web site http:/www.iec.ch J For price, see current catalogueCommission Electrotechnique InternationaleInternational Elect
3、rotechnical Commission 2 61029-2-4 Amend. 1 IEC:2001(E) FOREWORD This amendment has been prepared by subcommittee 61F: Safety of hand-held motor- operated electric tools, of IEC technical committee 61: Safety of household and similar electrical appliances. The text of this amendment is based on the
4、following documents: FDIS Report on voting 61F/371/FDIS 61F/386/RVD Full information on the voting for the approval of this amendment can be found in the report on voting indicated in the above table. The committee has decided that the contents of the base publication and its amendments will remain
5、unchanged until 2006. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or amended. _ Page 7 1 Scope 1.1 Modification: Replace the first paragraph by the following: This International Standard applies to transportable bench grinders (figure 101) and combine
6、d bench grinders (figure 107) with a wheel diameter and brush diameter not exceeding 200 mm and a peripheral speed not exceeding 50 m/s, as defined in 2.101 and 2.114. Add figure 107 as follows:61029-2-4 Amend. 1 IEC:2001(E) 3 1 - straight-sided grinding wheel 7 - nozzle for dust 2 - brush 8 - on/of
7、f device 3 - flange 9 - handle 4 - work rest 10 - spark arrestor 5 - transparent screen 11 - cup shaft guard 6 - guard for straight-sided wheel 12 - marking plate Figure 107 Combined bench grinder NOTE The drawings are given as a guide only. 2 Definitions Replace definitions 2.103, 2.104 and 2.112 a
8、s follows: 2.103 machine spindle motor spindle of the bench grinder or of the combined bench grinder which supports and transmits the rotation to the grinding wheels or to the grinding wheel and/or the brush 2.104 nozzle for dust collection device allowing the connection of a bench grinder or a comb
9、ined bench grinder to a dust collection system 2.112 working speed linear peripheral speed of the wheel or of the brush while working Add the following definition: 2.114 combined bench grinder tool designed to grind metal or similar materials or to clean, polish or deburr metal or similar materials
10、by means of an abrasive wheel and a brush fixed on opposite ends of the machine spindle, and which is located in a proper workplace and where pieces are held by hand IEC 490/01 4 61029-2-4 Amend. 1 IEC:2001(E) Page 11 7 Marking 7.1 Addition: Add the following items: for combined bench grinders, the
11、maximum diameter D of the brush to be used; for combined bench grinders/brushes, a warning near to the brush holder spindle never to use a grinding wheel on the brush side of the machine. 7.13 Addition: Replace the first paragraph as follows: The handbook or information sheet shall include all the n
12、ecessary information for safe working with the bench grinder or combined bench grinder, such as method of operation, wheel and brush changing, maintenance, assembly, transportation, etc. Replace the second dash as follows: do not use damaged or misshapen wheels or brushes; Replace the sixth dash as
13、follows: for bench grinders and combined bench grinders equipped with straight-sided flanges, the recommended values of the thickness T and the diameter of the hole; Add, before the note, the following additional dash: for combined bench grinders, to always keep the brush assembled on the spindle in
14、 order to limit the risk of contact with the rotating spindle. Page 15 18 Stability and mechanical hazards 18.1 Addition: Replace the first paragraph as follows: Bench grinders and combined bench grinders shall be equipped with an adequate guarding system, which cannot be removed without the aid of
15、a tool. 18.1.101 Guard Change the heading of this subclause as follows: 18.1.101 Guard for wheel Replace the first paragraph as follows: Bench grinders and combined bench grinders shall be equipped with guards which leave uncovered only a portion of the wheel as indicated in figure 102. Guards shall
16、 be designed to have mechanical resistance to accidental breaking of the wheels.61029-2-4 Amend. 1 IEC:2001(E) 5 Page 23 18.1.101.3 Spark arrestor Replace the first paragraph as follows: Bench grinders and combined bench grinders equipped with straight-sided wheels shall have a spark arrestor to lim
17、it the ejection of sparks and pieces of wheel from the wheel guard. Its aim is also to improve the collection of dust. 18.1.101.4 Work rest Replace the first paragraph as follows: Bench grinders and combined bench grinders shall be equipped with work rests. This require- ment does not apply to the b
18、rush side of the combined bench grinder. Replace the fourth paragraph as follows: When the bench grinder and/or the grinder side of the combined bench grinder is fitted with an inclinable work rest, the inclination shall only be possible downwards and the tilting upwards of the work rest shall be ma
19、de impossible (figure 105). Page 25 18.1.102.1 Flange Add a new subclause and incorporate in it the existing text of 18.1.102.1, as follows: 18.1.102.1.1 Flange for wheel Table 101 gives minimal dimensions of flanges made in steel or other material of adequate strength with minimal tensile strength
20、of 430 N/mm 2 or sintered powder metal with minimal tensile strength of 500 Nmm 2in relation to the diameter of the wheel and for a wheel thickness not exceeding 0,15 times the diameter. Divide the existing Table 101 Flange dimensions into a new Figure 108 and an amended Table 101 as follows: 6 6102
21、9-2-4 Amend. 1 IEC:2001(E) Dimensions in millimetres D Wheel nominal diameter df Minimal external diameter of flanges r Minimal width of contact surface E Minimal flange thickness on flat surface F Minimal flange thickness on inclined surface T Minimal depth of recess Figure 108 Flange dimensions fo
22、r wheel Table 101 Flange dimensions for wheel (see Figure 108) Dd f rEFT 100 34 6 5 3,2 1,5 125 42 8 6 3,2 1,5 150 52 9 10 5 1,5 200 68 1) 12 1) 10 1) 5 1) 1,5 1) 1) These values are valid for flanges to be used on wheels with 200 mm nominal diameter and 30 mm thickness. Cast iron flanges shall not
23、be used. Add the following new subclause: 18.1.102.1.2 Flange for brush Table 102 gives minimal dimensions of flanges made in steel or other material of adequate strength with minimal tensile strength of 430 N/mm 2 or sintered powder metal with minimal tensile strength of 500 N/mm 2 in relation to t
24、he diameter of the brush. IEC 491/0161029-2-4 Amend. 1 IEC:2001(E) 7 Dimensions in millimetres D Brush nominal diameter d f Minimal external diameter of flanges r Minimal width of contact surface E Minimal flange thickness on flat surface F Minimal flange thickness on inclined surface T Minimal dept
25、h of recess Figure 109 Flange dimensions for brush Table 102 Flange dimensions for brush (see Figure 109) Dd f rEFT 100 34 5 1,5 1,5 1,5 125 42 5 2 2 1,5 150 52 5 2,5 2,5 1,5 200 68 5 2,5 2,5 1,5 Cast iron flanges shall not be used. Page 27 18.1.103 Transparent screens Add a new subclause and incorp
26、orate in it the existing text of 18.1.103 as follows: 18.1.103.1 Transparent screen characteristics Replace the first three paragraphs as follows: The bench grinders and combined bench grinders shall be fitted with transparent screens designed to prevent projection of particles towards the eyes and
27、the face of the operator. The transparent screens shall be adjustable and of such dimensions that in normal positions of grinding and polishing, including in a vertical plane above the wheel or the brush, the operator shall see the working part of the wheel or of the brush only through the screen. T
28、he operation of adjusting the screen shall not modify the adjustment of other parts of the bench grinder or combined bench grinder. IEC 491/01 8 61029-2-4 Amend. 1 IEC:2001(E) 18.1.103.2 Minimal dimension of the transparent part of rectangular or trapezoidal transparent screens Replace the paragraph
29、s after Figure 106 as follows: The minimal dimensions of the transparent part of screens for bench grinders equipped with straight-sided cup wheels are identical to those of screens for bench grinders or combined bench grinders equipped with straight-sided wheels. However, for bench grinders and for
30、 the grinder side of the combined bench grinders, the thickness of straight-sided wheels shall be replaced by the width of the working part of the straight-sided cup wheel. For all bench grinders and combined bench grinders, the screens shall be mounted in such a way that the symmetrical axis of the
31、 screen coincides with the vertical median plane of the working part of the wheel or the brush (figure 106). Add the following new subclause 18.1.104 Protection of the free extremity of the rotative shaft in the combined bench grinder The shaft part on the brush side, when not fitted with a brush, s
32、hall be protected in order to avoid accidental contacts. Compliance is checked by applying the test pin in figure 2 of part 1. NOTE A possible solution for satisfying this requirement is shown in figure 110. Figure 110 18.2 Addition: Replace the text of the subclause as follows: Bench grinders and c
33、ombined bench grinders shall have provisions to be fixed on a support. IEC 492/0161029-2-4 Amend. 1 IEC:2001(E) 9 Page 29 20 Construction 20.18 Addition: Replace the title and text of the existing subclause 20.18 by the following: 20.18 Modification: Replace the existing test specification by the following: Compliance is checked by applying a sphere with a diameter of 100 mm 1 mm to the switch. It shall not be possible to start the tool by means of the sphere. _ ISBN 2-8318-5789-9 ICS 25.140.20; 25.080.50 Typeset and printed by the IEC Central Office GENEVA, SWITZERLAND
