1、UDC 621.9.06-185 DEUTSCHE NORMEN March 1977 0- d Es g g 55 y CL E $2 0“ S 2; as: !zg ES BO., E zz uc L 8s E 2“ E.2 I- I* A= - DIN 804 Machine Tools On-load Speeds for Machine Tools Nominal Values Limiting Values Transmission Ratios Werkzeugmaschinen; Lastdrehzahlen fr Werkzeugmaschinen; Nennwerte, G
2、renzwerte, bersetzungen For connection with the International Standard IS0 229 - 1973 issued by the International Organization for Standardization (ISO), see Explanations. The on-load speeds apply to the main spindles of machine tools with the drive motor under full load. Their nominal values are gi
3、ven in the speed table or on the setting scale on the machine and should also be used for calculating the machining times per part. They are preferred numbers according to DIN 323 Part 1 forming a geometrical progression according to the basic series R 20 with a common ratio cp = 1.12 and the derive
4、d series R 2012, R 2013, R 2014 and R 2016 with common ratios cp = 1.25 - 1.4 - 1.6 and 2. Basic series 1) R 20 (p= 1,12 1 O0 112 125 140 160 180 200 224 250 280 315 355 400 450 500 560 630 710 800 900 1000 The R 2012 (p 1,2 112 140 180 224 280 355 450 560 710 900 series R 2 Nominal values min- Deri
5、ved series 2) ectrical -2% 98 110 123 138 155 174 196 219 246 276 310 348 390 438 49 1 551 618 694 778 873 980 plying R 2013 (. .2800 . .) deviation +6% 106 119 133 150 168 188 212 237 266 299 335 376 422 473 531 596 669 750 842 945 1060 by 10, - 11,2 16 - 22,4 1400 2800 5600 31,5 45 -2% 98 110 123
6、138 155 174 196 219 246 276 310 348 390 438 49 1 551 618 694 778 873 980 63 90 R 20 - - = 1.4 - 125 - 180 250 355 500 710 - 1 O00 and I - - 1400 - 2000 2800 - 4000 5600 8000 - R 20/4 140 I 224 1 ;: 710 Limiting values min- 3) of the basic series R 20 for mechanical R 2016 i 2800. .) deviation (p=2 1
7、1.2 180 22,4 355 45 710 90 + 3% 103 116 130 145 163 183 206 23 1 259 290 326 365 410 460 516 579 650 729 818 918 1030 - - I - - The series R 20/3 and R 20/6 are given for three decimal ranges because their digits only repeat in each fourth decimal range. 1) The basic series R 20 include the full-loa
8、d speeds of the electric motors with a slip of about 6 %, using approximate values 355,710,1400 and 2800. 2) The derived series R 20/2, R 20/3, R 20/4 and R 2016 are provided for coarser progressions because the on-load motor speeds are not included in the basic series R 10 and R 5. There are two po
9、ssibilities for series R 20/4. 3) The limiting values contain the permissible deviations on the nominal values taking into account the mechanical and electrical deviation. The mechanical deviation of - 2 % or + 3 % limits the permissible deviations of the transmission ratios from the required values
10、, which normally cannot be precisely complied with in designing the gears. The elec- trical deviation of + 3% takes into account the differing full-load slip of motors of different manufacturers and different power output, which wries within limits of 3.5 to 6 %. The limiting values are calculated f
11、rom the precise values of series R 20. For calculating the gears, the limiting values in columns 7 and 8 should be complied with, values 355, 710, 1410 and 2820 being used for the on-load motor speeds. For practical operation the limiting values in columns 9 and 10 apply. Continued on pages 2 and 3
12、Explanations on page 3 Sole sale rights of German Standards (DIN-Normen) are with Eeuth Verlag GmbH. Berlin30andKln 1 02.81 DIN 804 engl. Preisgr. 4 Vertr.-Nr. 0104 Page 2 DIN 804 2 Checking of on-load speeds Conformity of the on-load speeds of a machine tool with the standardized values is most eas
13、ily checked when the machine is operating without load by measuring the no-load speeds of the drive motor and the main spindle and reading off the fulC load speed of the motor from its rating plate. The no-load speed of the main spindle is then converted in the ratio of the motor speeds, e. g. : Ful
14、l-load speed of motor read-off Measured no-load speed of motor Measured no-load speed of main spindle 1430 min- 1460 min- 372 min- 3 Eo .372 = 364 1460 Required on-load speed of main spindle I I cp= 1.06 I W= 1,0593 I The on-load speed lies within the limiting values 348 and 376 given in columns 9 a
15、nd 10 of Table 1. O 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 ia 19 20 21 22 Calculation of transmission ratios Table 2. 1.00 : 1 1,06 : 1 1,12 : 1 1,18 : 1 1.25 : 1 1,32 : 1 1.40 : 1 1.50 : 1 1,60 : 1 1,70 : 1 1.80 : 1 1,90 : 1 2,OO : 1 2,12 : 1 2.24 : 1 2,36 : 1 2.50 : 1 2,65 : 1 2.80 I 1 3,OO : 1
16、 3.15 : 1 3,35 : 1 3.55 : 1 1,0000 : 1 1,0593 : 1 1,1220 : 1 1,1885 : 1 1,2589 : 1 1,3335 : 1 1,4125 : 1 1,4962 : 1 1,5849 : 1 1,6788 : 1 1,7783 : 1 1,8836 : 1 1,9953 : 1 2,1135 : 1 2,2387 : 1 2,3714 : 1 2,5119 : 1 2,6607 : 1 2,8184 : 1 2,9854 : 1 3,1623 : 1 3,3497 : 1 3,5481 : 1 EXPO- 3,75 : 1 4,OO
17、 : 1 4,25 : 1 4,50 : 1 4,75 : 1 5,OO : 1 5,30 : 1 5.60 : 1 6.00 : 1 6.30 : 1 3,7584 : 1 3,981 1 : 1 4,2170 : 1 4,4668 : 1 4,7315 : 1 5,0119 : 1 5,3088 : 1 5,6234 : 1 5,9566 : 1 6,3096 : 1 33 34 6,70 : 1 7,lO : 1 6,6834 : 1 7,0795 : 1 23 24 25 26 27 29 30 28 7,50 : 1 8,OO : 1 8,50 : 1 9.00 : 1 31 32
18、7,4989 : 1 7,9433 : 1 8,4140 : 1 8,9125 : 1 39 40 9,50 : 1 35 36 37 38 From DIN 868 the “transmission ratio“ is the ratio of the speeds of the driv- ing shaft to that of the driven shaft. Since the speeds, as preferred numbers, are powers of the common ratio cp, the transmission ratios also are powe
19、rs of cp and can be determined by simple addition or subtraction of the exponents on the basis of the rules for calculating with exponents using the adjacent Table 2. It is therefore advisable only to use the preferred numbers for the speeds of all shafts in a gear system. Column 1 of Table 2 contai
20、ns the exponents x for common ratio ip = 1 .O6 (series R 40). Column 2 contains nominal values i = 1 : 1 to 10 : 1 for transmission ratios (i. e. for stepdown ratios) for calculation. The numerator is the xfh power of the common ratio cp. For larger transmission ratios, for each decimal range, the e
21、xponents should be increased by 40 since ip40 = 10. For transmission ratios i = 1 : 1 to 1 : 10 etc. (i. e. for step-up ratios) the same exponents are used with negative sign. Column 3 gives the precise values of the transmission ratios for calculation of the teeth numbers so as to permit rounding u
22、p or rounding down of fractional teeth numbers obtained by calculation whilst maintaining the maximum pos- sible approximation to the precise decimal-geometric progression. The simple calculation method using exponents can be seen from the follow- ing examples: 1. Given: Stage transmission ratio il
23、= 1 : 1.60 (X = - 8) (x = 4) Stage transmission ratio i2 = 1,25 : 1 R equ ired : Total transmission ratio i = il i2 (x= -8+4= -4) i= 1 : 1.25 2. Given: Total transmission ratio i = 6.3 : 1 (x = 32) (x = 21) Stage transmission ratio il = 3.35 : 1 Required : Stage transmission ratio i2 = i : il (x=32
24、-21=11) i2 = 1.90 : 1 3. Given: For a four-speed gear Common ratio cp= 1.4 (x = 6) and Maximum stage transmission ratio il = 2,12 : 1 (x = 13) Required: The other stage transmission ratios i2 = i1 :(p (=13 -6= 7) i2 = 1.50 : 1 i3 =i2 :cp (x= 7 -6= 1) i3 = 1,06 : 1 i4 =i3 :rp (x= 1-6=-5) il= 1 : 1.32
25、 DIN804 Page3 Further Standards DIN 803 Feeds for machine tools, nominal values, limiting values, transmission ratios Explanations This subsequent edition was necessitated by the adoption of IS0 Recommendation ISO/R 229 - 1961 asstandard IS0 229 - 1973: “Machine tools - speeds and feeds“. No alteration in factual content resulted.
