1、BRITISH STANDARD BS ISO 16156:2004 Machine-tools safety Safety requirements for the design and construction of work holding chucks ICS 25.080.01 BS ISO 16156:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 3 March 2004 BSI 3 March 2004 I
2、SBN 0 580 43449 4 National foreword This British Standard reproduces verbatim ISO 16156:2004 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee MTE/1, Machine tools, which has the responsibility to: A list of organizations repr
3、esented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”,
4、 or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer
5、immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate
6、them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to iv, pages 1 to 6, an inside back cover and a back cover The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued sinc
7、e publication Amd. No. Date Comments Reference number ISO 16156:2004(E)INTERNATIONAL STANDARD ISO 16516 tide tsriFino -400210-20 Machine-tools safety Safety requirements for the design and construction of work holding chucks Scurit des machines-outils Prescriptions de scurit pour la conception et la
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12、nuo plsaee inform ttneC ehlar Secrteiraat ta the serddaig sleb nevwo. ii BSISO16156:2004ISO 16156:2004(E) iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is
13、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 on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part
14、in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to pre
15、pare International Standards. 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 the member bodies casting a vote. Attention is drawn to the possibility that
16、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. ISO 16156 was prepared by Technical Committee ISO/TC 39, Machine tools, Subcommittee SC 8, Work holding spindles and chucks. BSISO16156:2004ISO
17、16156:2004(E) iv Introduction This International Standard was prepared to provide one means of conforming to the Essential Health and Safety Requirements of the Machinery Directive and associated EFTA Regulations. BSISO16156:2004INTENRATIONAL TSANDADR IS:65161 O4002(E)I SO 4002 All irthgs ersedevr 1
18、Machine-tools safety Safety requirements for the design and construction of work holding chucks 1 Scope This International Standard sets out the requirements and/or measures to remove the hazards and limit the risk on work holding chucks which are defined in 3.1. It covers all the hazards relevant t
19、o this component, as listed in Clause 4. The requirements concern designers, manufacturers, suppliers and importers of work holding chucks. It also includes information which the manufacturer shall provide for the user. It is primarily directed to components which are manufactured after its date of
20、issue. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1940-1:2003, Me
21、chanical vibration Balance quality requirements for rotors in a constant (rigid) state Part 1: Specification and verification of balance tolerances ISO 3089:1991, Self-centring manually-operated chucks for machine tools Acceptance test specifications (geometrical tests) ISO 3442:1991, Self-centring
22、chucks for machine tools with tow-piece jaws (tongue and groove type) Sizes for interchangeability and acceptance test specifications ISO 9401:1991, Machine tools Jaw mountings on power chucks EN 292-1:1991, Safety of machinery Basic concepts, general principles for design Part 1: Basic terminology,
23、 methodology EN 292-2:1991, Safety of machinery Basic concepts, general principles for design Part 2: Technical principles and specifications + Amendment 1:1995 EN 982:1996, Safety of machinery Safety requirements for fluid power systems and their components Hydraulics EN 983:1996, Safety of machine
24、ry Safety requirements for fluid power systems and their components Pneumatics EN 1005-2:2003, Safety of machinery Human physical performance Part 2: Manual handling of machinery and component parts of machinery BSISO16156:20041ISO 16156:2004(E) 2 I SO 4002 All irthgs ersedevr3 Terms and definitions
25、 For the purposes of this document, the following terms and definitions apply. 3.1 work holding chuck clamping device with movable jaws to hold a workpiece designated hereinafter by “chuck” NOTE Some chucks may be equipped with grooves or slots. 3.2 manually operated chuck chuck in which workpieces
26、are clamped with the aid of manual energy (e.g. by means of a key) 3.3 power-operated chuck chuck in which workpieces are clamped with the aid of pneumatic, hydraulic or electric energy 3.4 centrifugally compensated chuck chuck in which there is a system which permits compensation of the loss of cla
27、mping force due to centrifugal force 3.5 base jaw radial moving part of the chuck which receives the top jaw 3.6 top jaw element mounted on a base jaw for the clamping of workpieces 3.7 clamping force algebraic sum of the individual radial forces applied by the chuck jaws on the workpiece 3.8 static
28、 clamping force clamping force of the chuck before the chuck has been rotated 3.9 maximum static clamping force maximum clamping force obtained when the maximum permissible input force (or input torque) is applied to a particular design 3.10 dynamic clamping force actual clamping force when the chuc
29、k is rotating 3.11 clamping cylinder cylinder which actuates the chuck with the aid of pneumatic or hydraulic energy 3.12 centrifugal force force generated by rotation that tends to move all parts away radially from the axis of rotation of the chuck BSISO16156:20042ISO 16156:2004(E) I SO 4002 All ir
30、thgs ersedevr 3NOTE The centrifugal force (F c ) is expressed in newtons (N). 2 2 2 c 30 mv n mr mr F r = = where m is the mass, in kilograms, of the moving parts (usually jaws); r is the distance, in metres, of the centre of gravity of the moving parts (usually jaws) from the axis of rotation; is t
31、he angular velocity, in radians per second, of the centre of gravity of the moving parts (usually jaws); v is the peripheral velocity, in metres per second, of the centre of gravity of the moving parts (usually jaws); n is the rotational speed, in minutes to the power minus one. 3.13 input force for
32、ce acting on the chuck, applied from an external energy source which actuates the chuck mechanism 3.14 input torque torque acting on the chuck, applied from an external energy source which actuates the chuck mechanism 3.15 rotational balance equilibrium of all masses around the axis of rotation (any
33、 differences between the axis of rotation and the centre of gravity will cause imbalance) 3.16 maximum rotational speed n maxmaximum rotational speed, in minutes to the power minus one, specified by the manufacturer for chuck with standard jaws in compliance with the manufacturers instructions (see
34、6.2) 3.17 working rotational speed n wrotational speed, in minutes to the power minus one, under machining conditions (n wu n max ) 4 List of hazards Significant hazards are crushing, entanglement, drawing-in or trapping, impact, and ejection of any exchangeable or moveable part. BSISO16156:20043ISO
35、 16156:2004(E) 4 I SO 4002 All irthgs ersedevr5 Safety requirements and/or measures 5.1 General The appropriate means listed below shall be used during the design and construction of chucks in order to protect any person from being exposed to hazards: a) the chuck and its proper actuating equipment
36、(e.g. cylinder) shall be compatible (see 6.1.9); b) the balance quality factor G shall be provided by the manufacturers accompanying documents (see ISO 1940-1); c) base jaws of chucks shall be positively prevented (e.g. by locking pins) from being flung out by centrifugal force (see EN 292-1:1991, 3
37、.23.6); d) chucks with mass greater than 20 kg shall be equipped with means (e.g. threaded holes) for their handling (see 6.1.1). Verification: by checking the relevant drawings, inspection and type test certificate. 5.2 Special requirements For compensated chucks, n maxshall be stated by the manufa
38、cturer. For non-compensated chucks, n maxshall not exceed the speed corresponding to a calculated loss of 67 % of the total measured static clamping force with the manufacturers standard jaws, e.g. hard top jaw of stated mass and at a stated radius of gyration positioned on the base jaws. Verificati
39、on: by checking the relevant technical file. 5.2.1 Power operated chuck The chuck or chucking equipment (cylinders) shall be equipped with devices to ensure that the clamping force is effectively applied (e.g. travel sensors before stroke end). In the event of energy supply failure to the actuators/
40、cylinders, devices (e.g. check valves) shall be provided to ensure that the pressure is maintained for a period stated by the manufacturer (see EN 982 and/or EN 983). Verification: by checking the relevant drawings and/or inspection. 5.2.2 Chuck wrench and similar equipment The chuck wrench or simil
41、ar equipment for manual jaw locking or manually tightening all types of chuck shall be designed so that they do not remain located in the rotating chucks. Wrenches, similar equipment, or their locating points within chucks shall either be spring loaded to be self-removing when released, or shall pre
42、vent (by interlocking) the rotation of the spindle when inserted. Verification: by checking the relevant drawings and/or circuit diagrams and test report on the chuck or wrench. 5.2.3 Chucks with grooves or slots Chucks fitted with grooves or slots open to the outer periphery shall be equipped with
43、safety devices (e.g. pins) to prevent stops, counter balances or similar devices from being flung out of slots by centrifugal force. Verification: by checking the relevant drawings and/or inspection. BSISO16156:20044ISO 16156:2004(E) I SO 4002 All irthgs ersedevr 56 Information for use 6.1 General T
44、he following information shall be provided in the instruction handbook (see EN 292-2:1991, Clause 5 and especially 5.5). 6.1.1 Safety instructions for the proper use of the chuck including handling (see EN 1005-2) function, maximum rotational speed n max , dimensions, necessary adjustments and fixin
45、g elements, permissible clamping ranges and pressure/forces of power drives. 6.1.2 Method for determination of clamping forces to allow the user to assess the suitability of the chuck for the machining operation. 6.1.3 Information on clamping force variation when the chuck is running with a standard
46、 jaw (e.g. hard top jaw) to allow the user to determine the dynamic clamping forces. 6.1.4 Maximum permissible mass of the jaw/top jaw at its maximum radius and at maximum rotational speed. 6.1.5 Maximum distance between the centre of gravity of the clamping jaw and the end face of the chuck. 6.1.6
47、Methods of determination for special top-jaw clamping forces. 6.1.7 Instructions for maintenance including lubrication and intervals between checks of static clamping forces. 6.1.8 Information for component interchangeability, with reference to ISO 3089, ISO 3442 and ISO 9401. 6.1.9 Description of t
48、he conditions to be fulfilled at the interface between the work holding chuck and its actuating equipment. 6.1.10 Information on the chuck mass, expressed in kilograms. 6.1.11 The compliance of the chuck and its accessories with the present International Standard. Verification: by checking the instr
49、uctions for use. 6.2 Instructions for operator The following statements shall be included in the manufacturers instruction handbook. a) Hazards may arise from the characteristics of workpieces and machines used with a given chuck even if the specific requirements in Clause 5 are met. The user shall therefore consider such characteristics of workpieces (e.g. dimensions, mass and shape), and of machines
