1、UDC 621.833.2 : 621.753.1 DEUTSCHE NORM August 1986 Tolerancing of bevel gears Tolerances for tangential composite errors DIN 3965 Part 3 Toleranzen fr Kegelradverzahnungen; Toleranzen fr Wlzabweichungen Supersedes September 1981 edition. In keeping with current practice in standards published by th
2、e International Organization for Standardization (ISO), a comma has been used throughout as the decimal marker. 1 Scope and field of application The parameters for which tolerances have been given in this standard are defined in DIN 3971. The tolerances specified apply for straight, skew and spiral
3、bevel gears with and without axial offset. See also DIN 3965 Part 1. 2 Tolerances This standard specifies tolerances for the following parameters: - tangential composite error, Fi; - tangential tooth-to-tooth composite error, fi; - long-wave component of tangential composite error, fi; - short-wave
4、component of tangential composite error, fk. fk is obtained by multiplying the relevant tabulated value by Kg, which is a function of the total overlap, cy, and is given by 1 K6 = .y for cy less than 2 and i6 = 0.5 for cy not less than 2. Continued on pages 2 to 16 Beuth Verlag GmbH. Berlin, has the
5、 exclusive right of ssld for German Standards (DIN-Normen). 06-87 DIN 3965 Part 3 Engl. Price group 1 1 Sales No. O1 1 1 Page 2 DIN 3965 Part 3 Mean reference diameter, in mm Over 1 upto 10 Over lo upto 50 Over 50 upto 125 Over 125 upto 280 dm c Normal module, mmn: 1 mm to 2 mm Error fi for toleranc
6、e class 1 2 3 4 5 6 7 8 9 2,5 3.5 5.0 7,5 10 14 20 28 45 2,5 4.0 55 7,5 10 15 21 29 46 3.0 4,O 5.5 7,5 11 15 21 30 47 3,O 4,O 5,5 8,O 11 16 22 31 49 Tolerances in pm Mean reference Error Fi diameter, for tolerance class in mm 1 2 3 4 5 6 7 8 Over 4,5 6,5 9.0 12 17 24 34 47 Over lo 5.5 8,O 11 16 22 3
7、1 43 60 upto 50 Over 50 7,O 9,5 13 19 26 37 51 72 upto 125 Over 125 7,5 11 upto 280 Over 280 upto 560 upto 10 15 21 30 42 58 81 10 72 74 76 78 11 12 115 184 118 188 121 194 126 201 Normal module, inmn: 1 mm to 2 rnm dln I in mm 1 2 3 4 5 6 7 8 9 10 11 12 4.5 6,O 8,5 12 17 24 33 46 74 118 189 302 Ove
8、r 1 upto 10 Over 10 upto 50 Over 50 upto 125 93 13 18 25 36 50 70 98 158 250 401 641 Over 125 upto 280 Over 280 12 17 23 32 45 64 89 125 200 319 511 818 upto 560 29 41 57 80 112 157 251 402 644 1030 Over 560 15 21 up to 1000 Over Ooo 18 26 36 50 70 98 138 193 308 494 790 1264 up to 1600 Over 1600 22
9、 3, up to 2500 5,5 8,O 11 15 21 30 42 59 94 151 241 386 7,5 10 14 20 28 39 55 77 123 197 315 505 43 61 85 119 166 233 372 595 953 1524 1 DIN 3965 Part 3 Page 3 1 Tolerances in pm Mean reference diameter, in mm Over 1 upto 10 Over 10 upto 50 Over 50 upto 125 Over 125 upto 280 Over 28 upto 560 Over 56
10、0 up to lo00 Over 1000 up to 1600 dm r I up basic concepts DIN 3971 Terminology and parameters for bevel gears and bevel gear pairs Previous editions DIN 3965 Part 3: 09.81. Amendments The following amendments have been made in comparison with the September 1981 edition. a) The status of the standar
11、d is no longer that of a preliminary standard. b) The standard has been editorially revised. Explanatory notes DIN 3965 Parts 1 to 4 provide only information on the gear blank and on errors that can be measured by conventional means. The finer tolerances cannot yet be measured under production condi
12、tions. Nevertheless, the tables shown in DIN 3965 Parts 2 and 3 cover all diameter ranges, the fields crossed out indicating that for these diameter ranges no tolerances can currently be specified. In future, more advanced gauging and calculation methods may allow errors to be dealt with, which hive
13、 not as yet been specified, such as profile errors, and more information to be provided regarding the accuracy of bevel gears. The parameters (see clause 3) have been defined in DIN 3971, the aim of which was to include as many quantities as possible without regard for the current feasibility or dif
14、ficulty of their measurement. The structure of the tolerance system for bevel gears has been brought into line with that for cylindrical gears. The relationship between the parameters are the same, except for an overall shift in the tolerance system by one tolerance class. The tolerance system proposed may thus serve as an adequate basis for international discussion. International Patent Classification F 16 H 55/08 F 16 H 55/17
