1、f BRITISH STANDARD SPECIFICATION SPQT WELDING ELECTRODES B.S. 807 : i855 . November, 1962 (PD 4739) tncorporating amendments issued, April 1962 (PD 4519) BRITISH STANDARDS INSTITUTION Incorporated by Royal Charter British Standards House, 2 Park Street, London, WIY 4AA Telegrams: Standards London W1
2、 Telephone: 01629 9ooo BSI BS*807 55 W lb24b69 0067632 5 = B.S. 8M : 1955 THIS BRITISH STANDARD, having been approved by the Welding Industry Standards Committee and endorsed by the Chairman of the Engineering Divisional Council, was published under the authority of the General Council as a British
3、Standard on 23rd February, 1955. First published, August i938 First revision, February, 1955 The Institution desires to call attention to the fact that this British Standard does not purport to include all the necessary provisions of a contract. In order to keep abreast of progress in the industries
4、 con- cerned, British Standards are subject to periodical review. Suggestions for improvements will be recorded and in due course brought to the notice of the committees charged with the revision of the standards to which they refer. A complete list of British Standards, numbering over 6000, fully i
5、ndexed and with a note of the contents of each; will be found in the British Standards Yearbook, which may be purchased from BSI Sales Department. It may also Be con- sulted in many public libraries and similar institutions. British Standards are revised, when necessary, by the ssire either of anret
6、idtnerrt slips or of revised editiorrs. It is inporrniir that users of Brtsh Siandards should ascertain tli rliey we in possessio“ of the latest amendments or editiorrs. I Nominal Maximum outside of electrode dianieter of cooling tube The end of the inlet liibe should be at a distance not greater Il
7、lan 3h in. from lhe blind end of flic wilter cooling hole. 6 ., B.S. 807 : 1955 .I f /64 in. Fig. 1. Dimensions of shanks 1 TABLE 1 A Cooling hp diameter L Length of taper D Basis diameter in. 0.375 0.500 Nominai size For straight thrust For eccendc loading in. - in. % in. % in. % 13/16 0.625 - 0-75
8、0 3lg 314 I_ 1 15/16 1% n L 2% 1.250 34 7 See also Clause 5. ES1 BS*KB07 55 lb2Llbb7 00b7bL8 b D B.S. 807 : 1955 SECTION THREE: ELECTRODES DIhIENSIONS OF ELECTRODES 6. Electrodes shall conform to the dimensions shown in the following figures with their accompanying tables:- Vertical centre-Fig. 2 an
9、d Table 2 Vertical off-set-Fig. 3 and Table 3 Angle off-set-Fig. 4 and Table 4 Crank off-set-Fig. 5 and Table 5. SECTION OF STOCK 7. The cross section of the stock above the datum or gauge plane (basis diameter D) shall be circular (parallel or taper) for not less than % in. as shown in Figs. 2 to 5
10、. The remaining portion up to the formed tip shall be of circular or hexagonal section, except for 3/s in. electrodes which shall be. of circular section throughout. SPANNIIR FLATS 8. Dimension G for spanner flats of round stock as shown in Figs. 2 to 5 and Tables 2 to 5 is a minimum dimension and t
11、he flats may run out at the top of the electrode, . ?. ; . . -: .: 8 Datum or gauge For details of see Fig I and plane shanks Table I To le rances:- Ail fractional dimensions f /64in unless otherwise stated Circular stock Hexagonal stock Fig. 2. Vertical centre spot welding electrodes TABLE 2 As ali
12、ered April, I y62 . . See Foreword. t See Clause 8. R.S. 807 : 1955 -BI- * Datum or gauge plane L see Fig I and Table I For details of shanks Tolerances :- Ail fractional dimensions! unless otherwise stated Round stock Hexagonal stock Fig. 3. Vertical off-set spot welding el-ectrodes Sec Foreword. t
13、 See Clause 8. B.S. 807 : 1955 le in.min- “bmf-/- Datum or gauge plane parallel For details of shanks see Fig I and Table I Tolerances :- or taper I I I Ail fractional dimensions - Nomina size in. 34 /2 -. -. g, - /R Hexagonal stock 3- f_ H I unless otherwise stated . Fig. 4. Angle o-set spot weldin
14、g electrodes See Foreword. t See Clause 8. . Round qtock DL Basis Length n* . dir- 1 of 1 meter taper t 1/64 in. II _ - _- BSI BS*B07 55 BBi 36124bb 0067622 B U! B.S. 807 : 1955 , !i Datum or gauge plane L see Fig I and Table i , For details of shanks . Tolerances : - Ail fractional dimensions? Y6ri
15、n. unless otherwise stated I Round stock Hexagonal Sto;4 0.5268 1.2344 1% 0.6190 1.6094 1314 0.8254 2.1094 2% 1.0317 26095 2% NomInn1 size in. % 12 94 314 1 -1 w Diameter at face J +0*0005 h. -0 in. 0.3204 0.4454 0,5541 0.6682 0.8909 1.1136 f0.001 in. (approx.) AS altered Nov., 1962 Ar altered Nov.,
16、 1%2 13 I B.S. 807 : 1955 APPENDIX B MATERIAL FOR ELECTRODES Recommended properties:- 75 45 HDHC 135 205 I II . I11 I loo 97 80 1 110 The following resistivity fixed b the International Elcctrotcchnical Commission (I.E.C. Publication No. 28) is talen as the normal value for standard annealed copper :- . At a temperature of ZOC the volume resistivity of standard annealed copper is 1/58 = 0017241 ohm square millimetre per melre, (7). t B.S. 427, Tabla of diamond pyramid hardness numbers . ohm rnm 14
