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1、INTERNATIONAL STANDARD 229 INTERNATIONAL ORGANIZATION FOR STANOAROIUllONMEKIIYHAPOIIHAI OPTAHHSAUHII IlO CTAHIIAPTW3AUORGANISAlION INTERNATIONALE DE NORMALISATION Machine tools - Speeds and feeds First edition - 1973-12-15 iii UDC 621.9.06 - 185 Ref. No. ISO 229-1973 (E) 2 ? Deecripton : mechine too
2、ls, rotation, wlocity, mschine tool feeds, utilizetion, performsnco eveluetion. !i 0 i? Price based on 4 peges FOREWRD ISO (the International Organization for Standardization) is a worldwide federation of national Standards institutes (ISO Member Bedies). The work of developing International Standar
3、ds is carried out through ISO Technical Committees. Everv Member Body interested in a subject for which a Technical Committee has been set up has the right to be represented on that Committee. international organizations, governmental and non-governmental, in liaison with ISO, also take part in the
4、work. Draft International Standards adopted by the Technical Committees are circulated to the Member Borfies for approval before their acceptance as International Standards by the ISO Council. Prior to 1972, the results of the work of the Technical Committees were published as ISO Recommendations; t
5、hese documents are now in the process of being transformed into International Standards. As part of this process, Technical Committee ISO/TC 39 has reviewed ISO Recommendation R 229 and found it suitable for transformation. International Standard ISO 229 therefore replaces ISO Recommendation R 229-1
6、961. ISO Recommendation R 229 was approved by the Member Bodies of the following countries : Belgium Burma Czechoslovakia Denmark Finland France Germany Hungary Italy Pakistan Philippines Poland Romania South Africa, Rep. of Sweden Switzerland United Kingdom U.S.S.R. The Member Borlies of the follow
7、ing countries expressed disapproval of the Recommendation on technical grounds : Netherlands USA. The Member Body of the following country disapproved the transformation of ISO/R 229 into an International Standard : United Kingdom ? Subsequently, this Member Body approved the Recommendation 0 Intern
8、ational Organization for Standardkation. 1973 ? Printed in Switzerland -,-,- INTERNATIONAL STANDARD ISO 229-1973 (E) Machine tools - Speeds and feeds 1 SCOPE AND FIELD OF APPLICATION This International Standard specifies the Speeds (number of revolutions or strokes per minute) and the feeds (in mill
9、imetres or in inches, per minute, per revolution, or per stroke) of machine tools working by removal of metal and driven directly by an electrical motor. lt is not applicable, for obvious technical reasons, to machines with continuous Speed variations, feeds for thread forming, etc. 2 GENERALITIES 2
10、.1 The basic values of the speeds, as well as those of the feeds, are taken from the R 20 series of preferred numbers (See ISO 3). 2.2 The permissible limits for the actual valueo have been determined not from the basic values, but from the corresponding theoretical values of the geometric series wi
11、th ratio “xfiii The limits of tolerante, compared with these theoretical values, are given in table 1. TABLE 1 - Limits of tolerantes rolrmmo % Tolerante % f0rm-b for foeds number of millimetres inches wolutions millimetres inches per per or strokes per minute per minute revolution revolution per mi
12、nute or per stroke or per strok 1 -,-,- ISO 229-1973 (EI 2.3 The adoption of percentage limits, slightly different according as the feed is expressed either in millimetres or in inches, is justified by the necessity to make the prescribed limits coincide, whatever the unit of measurement used. (So a
13、s to achieve this condition in a more precise way, the limits in inches have been directly converted from the limits in millimetres.) 3 SPEEDS 3.1 Definitions For the purposes of this International Standard, the following definitions apply : 3.1.1 speeds : The spindle Speeds per minute under Load of
14、 the spindie of the machine. 3.1.2 basic value: The value shown on the plate of the machine and used for calculating cutting times. 3.1.3 actual value: The value, which must lie within the limits of the prescribed tolerantes, conventionally given by the formula : NC spindle Speed under load = spindl
15、e Speed without load X- N” where N, is the Speed of the motor, under load, inscribed on the plate; N, is the Speed of the motor, measured with the machine running without load. 3.2 Basic values The complete range of basic values for the Speeds of a machine tool shall include only values taken from t
16、he R 20 series of preferred numbers, as shown in column 1 of table 2, or from their decimal multiples or submultiples. Provided that this condition is satisfied, the scaling is left free and the values may be Chosen so as to meet the requirements of the machine tool. 3.3 Tolerantes The actual values
17、 of the Speeds, checked as indicated above, shall lie within the limits of the total tolerante. Compared with the theoretical numbers in the geometric series with ratio “6, this total tolerante is approximately equal to 5 g % of the value. lt is the sum of an electrical tolerante of + z%and a mechan
18、ical tolerante of approximately 5 z %. Table 2 gives : - in columns 2 and 3 : the limits of the actual values, corresponding to the prescribed tolerante (total tolerante) : electrical + mechanical; - in columns 4 and 5 : the limits for calculating the mechanical tolerante. TABLE 2 - Speeds : number
19、Of rWOhJtiOnS or strokes per minute Limits corresponding Limits for calculrting to the total tolerante : the mechanical Basic value electricel + mechenical tolerancel ) R 20 -2 + 6 % approximately -2 + 3 % approximately 1 100 112 125 140 160 180 2cla 224 250 280 315 365 400 450 500 560 630 710 800 9
20、00 1000 min. maX. min. max. 2 3 4 5 98 106 98 103 110 119 110 116 123 133 123 130 138 150 138 145 155 166 155 163 174 188 174 183 196 212 196 206 219 237 219 231 246 266 246 259 276 299 276 290 310 335 310 326 348 376 348 365 390 422 390 410 438 473 438 460 491 531 491 516 551 596 551 579 618 669 61
21、8 650 694 750 694 729 778 842 778 818 873 945 873 918 980 1 060 980 1 030 lt For the calculation of the transmission ratio of the driving equipment, the Speed at the input is taken as lower by 6 % than the synchronous Speed of the motor. (The quotient of the Speed at the input by each of the two tab
22、ulated limits gives the extreme values of the transmission ratio.) To extend the table upwards or downwards, divide or multiply the given values by 10 or a power of 10. -,-,- ISO 229-1973 (EI 4 FEEDS It is the sum of 4.1 Definitions For the purposes of this International Standard, the following defi
23、nitions apply : an electrical tolerante of about + i %, and of a mechanical tolerante equal about to : + z % for feeds in millimetres per minute, 4.1.1 feeds : Either the feed per minute under Load if the feed mechanism is directly driven by the motor, or the feed per revolution (or per stroke), if
24、it is driven by the spindle. 5 2” % for feeds in inches per minute. 4.1.2 bade value : The value shown on the plate of the Table 3 gives, in millimetres, and table 4 in inches. machine and used for calculating cutting times. - in columns 2 and 3 : the limits of the actual values, corresponding to th
25、e tolerante specified (total 4.1.3 actual value: The value which must lie within the tolerante : electrical i- mechanical), limits of the prescribed tolerantes. - in columns 4 and 5 : the limits for calculating the a) In the case of feed by minufe, it is given, by mechanical tolerante of the feed pe
26、r minute (coinciding convention, by the formula : with the limits of the actual values corresponding to the feed under load = feed without load x$- tolerante specified below for the feed per revolution (or per stroke). Y where 4.4 Tolerantes on the feed per revolution (or per stroke) Nc is the Speed
27、 of the motor under load, indicated on The actual value on the feed per revolution (or per stroke) the plate; shall Iie within the minimum and maximum limits shown in N, is the Speed of the motor, measured with the machine running without load. b) In the case of feed per revolytion (or per strokel,
28、it is not related to the motor. 4.2 Basic values The complete range of basic values for the feeds of a machine tool shall include only values taken from the R 20 series of preferred numbers, as shown in column 1 of table 3, or their decimal multiples or submultiples. Provided that this condition is
29、satisfied, the scaling is left free and the values may be Chosen so as to meet the requirements of the machine tool. 4.3 Tolerantes on the feed per minute (driven independently of the spindle) The actual value of the feed per minute, checked as indicated above, shall lie within the limits of the tot
30、al tolerante. Compared with the theoretical numbers in the geometric series with ratio “m, this total tolerante IS approximately equal to : columns 4 and 5 of table 3, for millimetres, and of table 4, for inches, which correspond only to the mechanical tolerante of the gearbox, since the feed per re
31、volution (or per stroke) is independent of the motor. NOTE - The resulting fead per minute, which is the product of the feed per revolution (or per stroke) and the Speed per minute, may vary. by the combined action of the tolerantes on these last two factors, between - 4 96 and + 9 %, if the feed is
32、 expressed in millimetres, and between - 5 % and + 8 %, if it is expressed in inches. T 6 % for feeds in millimetres per minute, 5 g % for feeds in inches per minute. 3 -,-,- ISO 229-1973 (EI TABLE 3 - Feeds in millimetres TABLE 4 - Feeds in inches 8wic valua R 20 1 1 0.98 1.06 0.98 1.03 0.040 0.038
33、 6 0.0417 0.038 6 0.040 6 1.12 1 ,lO 1.19 1,lO 1.16 0.045 0.043 3 0.046 9 0.043 3 0.045 7 14.25 1.23 1.33 1.23 1.30 0.050 0.048 4 0.052 4 0.048 4 0.051 2 1.4 1.38 1.50 1.38 1.45 0.066 0.054 3 0.059 1 0.054 3 0.057 1 1.6 1.55 1.68 1.55 1.63 0.063 0.061 0 0.066 1 0.061 0 0.064 2 1 B 1.74 1.88 1.74 1,8
34、3 2 1.96 2.12 1.96 2.06 2.24 2.19 2.37 2.19 2.31 2.5 2.46 2.66 2.46 2.59 2.8 2.76 2.99 2.76 2.90 0.071 0.068 5 0.074 0 0.068 5 0.072 1 0.080 0.077 2 0.083 5 0.077 2 0.081 1 0.090 0.086 2 0.093 3 0.086 2 0.090 9 O.ltnl 0.097 0.105 0.097 0.102 0.112 0.109 0.118 0.109 0.115 3.15 3,lO 3.35 3.10 3.26 0.1
35、25 0.122 0.132 0.122 0.128 365 3.48 3.76 3.48 3.65 0.140 0.137 0.148 0.137 0.144 4 3.90 4.22 3.90 4.10 0.166 0.154 0.166 0.154 0.162 4.5 4.38 4.73 4.38 4.60 0.180 0.172 0.186 0.172 0.181 5 4.91 5,31 4.91 5.16 0.200 0.193 0.209 0.193 0.203 5,6 5.51 5.96 5.51 5.79 0.224 0.217 0.235 0.217 0.228 6.3 6.1
36、8 6.69 6.18 6.50 0.250 0.243 0.263 0.243 0.256 7.1 6.94 7.50 694 7.29 0.280 0.273 0.295 0.273 0.287 8 7.78 8.42 7.78 8.18 0.315 0.306 0.331 0.306 0.322 9 8.73 9.45 8.73 9.18 0.355 0.344 0.372 0.344 0.362 10 9.80 10.6 9.80 10.3 0.400 0.388 0.417 0.386 0.406 Feeds per mitwatet) Feeds per rewolution (o
37、r per stroke12) Limits of the tolerante Limits of the tolerante -2 + 6 % approximately -2 + 3 % approximately min. 2 nlaX. 3 min. 4 max. 5 Basic valuc R 20 1 Feeds per mittute) Limits of the tolerante -3 + 5 % approximately min. 2 max. 3 Feeds per revolution (or per strokej2) Limits of the tolerante
38、 -3 + 2 % approximately min. 4 max. 5 1) The limits given for the actual values of feeds per minute in columns 2 and 3 correspond to the sum of the electrical and mechanical tolerantes. The mechanical tolerence is calculated as for feeds per revolution for per stroke) from valuas in columns 4 and 5,
39、 but, for the calculation of the transmission ratio of the driving equipment, the Speed at the input is taken as lower by 6 % than the synchronous Speed of the motor. (The quotient of the speed at the input by each of the two tebulated limits gives the extreme values of the transmission ratio.) 2) The actual limits of feed per revolution (or per stroke) in columns 4 and 5 correspond to a mechanical tolerante only. To extend the table downwards or upwards, divide or multiply the given values by ;3 Zr a power of 10. -,-,-
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