1、BRITISH STANDARD BS3821-1: 1974 Specification for Hardmetal dies and associated hardmetal tools Part1: Designation and marking of as-sintered pellets and finished dies UDC 621.778.1.073:669.018.25+621.778.1.073777BS3821-1:1974 This BritishStandard having beenapproved by the MechanicalEngineering Ind
2、ustryStandards Committee,was published underthe authority oftheExecutive Boardon 29July1974 BSI04-2000 The following BSI references relate to the work on this standard: Committee reference MEE/155 Draft for comment72/33676 DC ISBN 0 580 08082 X Co-operating organizations The Mechanical Engineering I
3、ndustry Standards Committee, under whose supervision this BritishStandard was prepared, consists of representatives from the following Government departments and professional and industrial organizations: The organizations marked with an asterisk in the above list, together with the following, were
4、directly represented on the committee entrusted with the preparation of this BritishStandard: Associated Offices Technical Committee Department of Trade and Industry National Association of Consulting Engineers Engineering Laboratory Association of Hydraulic Equipment Electricity Supply Industry in
5、England and Manufacturers Ltd. Wales Association of Mining Electrical and Engineering Equipment Users Association Mechanical Engineers Federation of Manufacturers of Construction British Compressed Air Society Equipment and Cranes British Electrical and Allied Manufacturers Institution of Civil Engi
6、neers Association Institution of Gas Engineers British Gas Corporation Institution of Heating and Ventilating British Gear Manufacturers Association Engineers British Internal Combustion Engine Institution of Mechanical Engineers* Manufacturers Association Institution of Plant Engineers British Mech
7、anical Engineering Confederation Institution of Production Engineers British Pump Manufacturers Association London Transport Executive British Steel Industry* Machine Tool Trades Association Crown Agents for Oversea Governments and Ministry of Defence Administrations Ministry of Defence, Army Depart
8、ment Department of Employment (HM Factory National Coal Board Inspectorate) Process Plant Association Department of the Environment Railway Industry Association of Great Britain Department of Trade and Industry Energy Royal Institute of British Architects Technology Telecommunication Engineering and
9、 Department of Trade and Industry (Marine) Manufacturing Association British Non-ferrous Metals Federation High Institute of Iron and Steel Wire Manufacturers Conductivity Copper Group Individual experts British Hard Metal Association British Independent Steel Producers Association Amendments issued
10、 since publication Amd. No. Date of issue CommentsBS3821-1:1974 BSI 04-2000 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 Scope 1 2 Symbols 1 3 Designation 2 3.1 Pellets 2 3.2 Finished dies 2 4 Marking 3 Appendix A Terminology of characteristic elements of pellets andca
11、sesinEnglish, French, German and Italian 4 Figure 1 Symbols for as-sintered pellets 1 Figure 2 Symbols for finished dies 1 Figure 3 Marking of dies 3BS3821-1:1974 ii BSI 04-2000 Foreword This BritishStandard has been prepared under the authority of the Mechanical Engineering Industry Standards Commi
12、ttee and takes into account some sections of ISO Recommendation R1684, “Wire, bar and tube drawing dies DesignationMarkingDimension”. Specifying a method of designation of as-sintered pellets and finished dies, and the subsequent marking of dies, which has been internationally agreed, it is intended
13、 to resolve some of the difficulties which may arise in both national and international trade. Other sections of ISO/R1684 which deal with dimensions of various types of sintered pellets, dies and cases are dealt with in the following Parts of this BritishStandard: Part2: As-sintered pellets and fin
14、ished dies for drawing round wire; Part3: As-sintered pellets and finished dies for drawing round bar. Part2 of this standard revises and extends the scope of the1964 edition of BS3821. Further Parts of the standard, dealing with other hardmetal dies and associated hardmetal tools, will be published
15、 in due course. Appendix A gives terminology of the basic elements of pellets and cases in English, French, German and Italian. 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. Complia
16、nce with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1to5 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated
17、. This will be indicated in the amendment table on the inside front cover.BS3821-1:1974 BSI 04-2000 1 1 Scope This BritishStandard specifies a designation system for pellets and finished dies for drawing wire, bar and tube and illustrates how the cases of finished dies are to be marked. 2 Symbols Fo
18、r the purposes of this BritishStandard the symbols shown in Figure 1 and Figure 2 relate to the dimensions of as-sintered pellets and finished dies respectively. Figure 1 Symbols for as-sintered pellets Figure 2 Symbols for finished diesBS3821-1:1974 2 BSI 04-2000 3 Designation 3.1 Pellets. Pellets
19、shall be designated in the following manner: Position 1. Reference letters for pellets: Position 2. Pellet diameter, d 02 , in millimetres. The references after Position2 shall be preceded by a hyphen. Position 3. Diameter of the as-sintered bore, d 01 , in millimetres. Position 4. Drawing angle 1)
20、,2 0for C to F or2 0for A or B, in degrees, or radius 2)in millimetres. Position 5. The letters ISO. (This will be Position4 for A and B.) NOTEThe subject of grades of application is still under consideration within ISO: when this has been resolved the selected reference will be included in the desi
21、gnation system between Positions4 and5 shown above. An as-sintered hardmetal pellet shall be designated by one letter (pellet reference letter), for example A. A finished carbide drawing die shall be designated by two letters (pellet reference letter and code letter for the shape of the case), for e
22、xample CZ (see3.2). For as-sintered pellets A and B which are not cored,00 shall be shown in Position3 of the designation. For all pellets the figures shown in Position3 shall include the decimal point when this value of d 01is not a whole number. When this value is a whole number the decimal point
23、shall not be used. Examples of designation Designation for an as-sintered hardmetal pellet for drawing round steel wire, pellet diameter d 02 =14mm, core diameter d 01 =0.6mm: A14-0.6-ISO Designation for an as-sintered hardmetal pellet for round steel bar drawing dies, pellet diameter d 02 =40mm, ro
24、ugh bore diameter d 01 =14mm; drawing angle2 0 =16 : C40-14-16-ISO 3.2 Finished dies. Finished dies shall be designated in the following manner: Position 1. Reference letters for pellets: Position 2. Reference letters for the shape of the case: Position 3. Pellet diameter, d 2 , in millimetres. The
25、references for Positions3 to6 (or7 when 3)footnote to Position6 applies) shall be separated by a solidus. Position 4. Case diameter, d 3 , in millimetres. Position 5. Dimensions of bore or bearing. For dies with pellet reference letter A to F, the diameter of bearing, d 1 , in millimetres (seeAppend
26、ix A). A for dies for drawing round steel wire B for dies for drawing round non-ferrous wire C for dies for drawing round steel bar D for dies for drawing round non-ferrous bar E for dies for drawing round steel tube F for dies for drawing round non-ferrous tube L for dies for drawing square or rect
27、angular section steel bar N for dies for drawing square or rectangular section non-ferrous bar R for dies for drawing hexagonal steel bar S for dies for drawing hexagonal non-ferrous bar 1) Where the bore profile is not specified, the user will need to supply all relevant details of the reduction an
28、d of the material to be drawn (for example mild steel up to0.4% carbon, copper, aluminium alloys, etc.) together with the method of drawing (for example dry or wet drawing, push-pointing, floating or fixed plugs, etc.). 2) To replace the conical surface of the entry cone,2 0for C to F or2 0for A or
29、B, by a toric surface, angle2 0or2 0in the designation should be replaced by the symbol99 accompanied by the radius value, in millimetres, of the generated circle of the toric surface. A for dies for drawing round steel wire B for dies for drawing round non-ferrous wire C for dies for drawing round
30、steel bar D for dies for drawing round non-ferrous bar E for dies for drawing round steel tube F for dies for drawing round non-ferrous tube L for dies for drawing square or rectangular section steel bar N for dies for drawing square or rectangular section non-ferrous bar R for dies for drawing hexa
31、gonal steel bar S for dies for drawing hexagonal non-ferrous bar Z cylindrical shape K conical shape 3) To replace the conical surface of the entry cone,2 for C to F or2 for A or B, by a toric surface, angle2 or2 in the designation should be replaced by the symbol99 accompanied by the radius value,
32、in millimetres, of the generated circle of the toric surface.BS3821-1:1974 BSI 04-2000 3 For dies with pellet reference letter L or N, the dimensions of the bore section (a a for a square section or a b for a rectangular section), in millimetres (see Appendix A). For dies with pellet reference lette
33、r R or S, the dimension of hexagon across flats, a, in millimetres (see Appendix A). Position 6. Drawing angle 4) ,2 for pellet reference C to F or2 for pellet reference A or B, in degrees, or radius 5)in millimetres. Position 7. (or8 when 5)footnote to Position6 applies). The letters ISO. NOTEThe s
34、ubject of grades of application is still under consideration within ISO; when this has been resolved the selected reference will be included in the designation system between Positions6 and7 shown above. Examples of designation Designation for a finished die for drawing round steel wire, in a cylind
35、rical case, pellet diameter14mm, case diameter28mm, bore diameter3.5mm, drawing angle16 : AZ14/28/3.5/16 ISO Designation for a finished die for drawing round non-ferrous bar in a conical case, pellet diameter25mm, case diameter75mm, bore diameter9mm, toric surface of radius30mm: DK25/75/9/99/30 ISO
36、Designation for a finished die for drawing square section non-ferrous bar, in a cylindircal case, pellet diameter45mm, case diameter100mm, bore section15mm 15mm, drawing angle20 : NZ45/100/15 15/20 ISO 4 Marking The finished dies shall be permanently and indelibly marked in accordance with the follo
37、wing requirements (and as illustrated in Figure 3): 1) On the entry face. The manufacturers name or trademark and the diameter of bearing (d 1 ). 2) On the exit face. The letters ISO and the pellet diameter (d 2 ), and the number of this BritishStandard, BS3821. NOTE 1Care should be taken to ensure
38、that marks do not adversely affect the sealing of seating characteristics of the die. NOTE 2The mark BS3821 on or in relation to a product is a claim by the manufacturer that the product complies with the requirements of this BritishStandard. 4) Where the bore profile is not specified, the user will
39、 need to supply all relevant details of the reduction and of the material to be drawn (for example mild steel up to0.4% carbon, copper, aluminium alloys, etc.) together with the method of drawing (forexample dry or wet drawing, push-pointing, floating or fixed plugs, etc.). 5) To replace the conical
40、 surface of the entry cone,2 for C to F or2 for A or B, by a toric surface, angle2 or2 in the designation should be replaced by the symbol99 accompanied by the radius value, in millimetres, of the generated circle of the toric surface. Figure 3 Marking of diesBS 3821-1:1974 4 BSI 04-2000 Appendix A
41、Terminology of characteristic elements of pellets and cases in English, French, German and ItalianBS 3821-1:1974 BSI 04-2000 5 The following equivalent terms in English, French, German and Italian have been extracted from ISO/R1684 Symbol Wire, bar and tube drawing dies Terminology of characteristic
42、 elements of pellets and cases Filires de trfilage et dtirage Terminologie des lments caractristiques des noyaux des montures Ziehsteine u. Ziehringe Terminologie der Hauptabmessungen von Kern und Fassung Filiere per trafilatura Terminologia degli elementi caratteristici dei nuclei e della montatura
43、 d 1 d 2 d 3 h 2 h 3 l 1 l 2 l 3 Die Pellet Case diameter of bearing diameter of pellet diameter of case height of pellet height of case length of entry angle length of drawing angle length of bearing Filire Noyau Monture diamtre de calibrage diamtre du noyau diamtre de la monture hauteur du noyau h
44、auteur de la monture longueur du cole dentree longueur du cole de rduction longueur de la partie calibrante Ziehstein Kern Fassung Zieholdurchmesser Kerndurchmesser Fassungsdurchmesser Kernhhe Fassungshhe Lnge der Eingangsffnung lnge des ziehkegels Fhrungslnge Filiera Nucleo Montatura o Armatura dia
45、metro del cilindro di calibratura diametro del nucleo diametro della montatura altezza del nucleo altezza della montatura lunghezza del cono di entrata lunghezza del cono di riduzione lunghezza del cilindro di calibratura l 4 l 5 length of exit angle length of entry opening of thecase longueur du cn
46、e de sortie longueur de lentre de la monture Lnge der Ausgangsffnung Lnge der Eingangsffnung in der Fassung lunghezza del cono di uscita lunghezza del cono di entrata relativa alla montatura l 6 s a b length of exit angle of the case wall thickness of the pellet bore dimension across flats a b longu
47、eur du cne de sortie de la monture paisseur de paroi du noyau dimensions dalsage sur plats a b Lnge der Ausgangsffnung in der Fassung Wanddicke des Kernes Ziehholinnenmasse fr Flachabmessungen a b lunghezza del cono di uscita relativa alla montatura spessore del nucleo dimensione dellalesaggio perpi
48、atti a b 1 2 2 drawing angle angle of entry cone exit angle angle du cne de rduction angle du cne dentre angle du cne de sortie Ziehkegelwinkel Eingangsffnungswinkel Ausgangsffnungswinkel angolo del cono di riduzione angolo del cono di entrata angolo del cono di uscitaBS3821-1: 1974 BSI 389 Chiswick
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