1、GM DAEWOO Auto & Technology EDS Engineering, GM DAEWOO Auto & Technology Standards DRAWING PRACTICE FOR GEARS Do Not Use on New Programs. Being Replaced by Global Design Standards EDS-A-1021 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 3 (Superceded) EDS-A-1021DRAWING PRACTICE FOR G
2、EARS PAGE: 1/16 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 3 GM DAEWOO Auto & Technology Note: This standard may be applied only for current project drawings generated by CATIA. It is Superceded for all future projects and replaced by Global Design Standards. 1. SCOPE This standar
3、d applies to the drawing practice of involute gears used in GM DAEWOO Auto & Technology Company (hereinafter referred to as the “GMDAT“). 1.1. Spur gear (Fig. 1) 1.2. Helical gear (Fig. 2, Fig. 3) 1.3. Double helical gear (Fig. 4) 1.4. Rack and pinion (Fig. 5) 1.5. Straight bevel gear (Fig. 6) 1.6.
4、Spiral bevel gear (Fig. 7) 1.7. Hypoid gear (Fig. 8) 1.8. Worm and worm wheel (Fig. 9, Fig. 10) This standard applies also to other gears not described here. This standard specifies peculiar characteristics of gears, and thus general particulars of gears in drawings shall conform to GMDAT drawing st
5、andards. 2. REPRESENTATION OF GEARS 2.1. Table entry and figures in parts drawings Parts drawings of gears contain both the table and figure. The entry is as follows. 2.1.1. The table basically contains items necessary for tooth cutting, assembly and inspection Items marked with * are entered upon n
6、ecessity. 2.1.2. In figures, dimensions necessary for manufacturing gear material are mainly entered. The positioning plane, which is crucial for assembly, may be entered upon necessity. Note) The gear material means the machined material before the tooth cutting stage. 2.1.3. Items relating to mate
7、rial, heat treatment and hardness are entered in the note column of the table or in figure upon necessity. 2.1.4. Fig. 1 to 10 show examples of various gear parts drawings. Figures, dimensions, and contents are all for example, and some are omitted except for dimensions specific to gear. 2.1.5. Whil
8、e some figures in this standard do not contain deviation, the actual drawings shall contain all necessary EDS-A-1021DRAWING PRACTICE FOR GEARS PAGE: 2/16 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 3 GM DAEWOO Auto & Technology deviation. 2.2. Representation 2.2.1. Representation o
9、f lines : Use of lines shall conform to the following. (1) The addendum circle shall be drawn in a thick solid line. (2) The pitch circle shall be drawn in a thin long chain line. (3) The dedendum circle shall be drawn in a thin solid line. When representing the figure viewed from the direction perp
10、endicular to the shaft (hereinafter called “the projected view“) in a section, however, it shall be drawn in a thick solid line. (See Fig. 18, Fig. 10 and Fig. 15). The dedendum circle may not be drawn. Especially in figures viewed from the axial direction of the bevel gear and worm wheel (hereinaft
11、er called “the side view“), it is omitted in principle. (See Fig. 68, and Fig. 10) (4) The tooth direction shall usually be drawn in three thin solid lines (See Fig. 4, 5, Fig. 79, Fig. 16 (a)(c), Fig. 18 (a), Fig. 19 (d)(e), Fig. 20 (a) (5) When representing the main projected view in a section, th
12、e external helical gear shall be represented in three thin phantom lines (see Fig. 2), and the tooth direction of the internal helical gear shall be represented in three thin solid lines (Fig. 3). The tooth is represented with () in case of the right hand direction and (/) in case of the left hand d
13、irection. 2.2.2. Representation of detailed tooth profile and dimension measurement method The detailed tooth profile and dimension measurement method are indicated in drawings when required. (see Fig. 11) 2.2.3. Representation of tooth chamfering Example of tooth chamfering is represented as in Fig
14、. 12. 2.2.4. Representation of tooth location Tooth location is represented as in Fig. 13 and 14 when required. 2.2.5. Representation of engaged gears Engaged gears are represented as in Fig. 15. The addendum circle of the engaged part shall be drawn in a thick solid line. When representing the main
15、 projected view in a section, the line representing an addendum circle of the engaged part shall be drawn in a thick or thin broken line. The sketch of the engaged gear shall conform to examples in Fig. 16 to 20. EDS-A-1021DRAWING PRACTICE FOR GEARS PAGE: 3/16 ISSUED DATE: 1996. 04. 10 REVISED DATE:
16、 2008. 05. 31 VERSION: 3 GM DAEWOO Auto & Technology Unit : mmSpur gear Tooth profile Profile shift Finishing Hobbing Tooth profile Full depth tooth Precision KS B 1405 class 5 Module 6 Basic rack Pressure angle 20 Number of teeth 18 Reference diameter 108 Addendum modification +3.16 Whole depth 13.
17、34 Tooth thickness Tooth thickness (No. of teeth=3)RemarkAddendum modification of mating gear Number of teeth of mating gearCenter distance Backlash * Material * Heat treatment * Hardness 0502070.200.89Fig 1. Spur gear (Example of indication) 06.036.096.47EDS-A-1021DRAWING PRACTICE FOR GEARS PAGE: 4
18、/16 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 3 GM DAEWOO Auto & Technology Unit : mmHelical gear Tooth profile Standard Whole depth 9.40 Tooth profile reference plane Normal plane Tooth profile Full depth tooth Tooth thicknessOver pin (ball) size (ball dia.=7.144) Module 4 Finis
19、hing Grinding Basic rack Pressure angle 20 Precision KS B 1405 Number of teeth 19 Helix angle 26.7 (2642) Helix direction Left * Lead 531.385 Reference diameter 85.071 RemarkNumber of teeth of mating gear Center distance Base circle diameter * Material * Heat treatment * Hardness Effec. hardening de
20、pth Backlash Tooth profile to be modified and crowned 2496.26578.783SNCM415Carb/quenHRC55610.81.20.150.31Fig 2. Helical gear (Example of indication) 17.029.019.95EDS-A-1021DRAWING PRACTICE FOR GEARS PAGE: 5/16 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 3 GM DAEWOO Auto & Technolog
21、y Unit : mmInternal helical gear Tooth profile Standard Tooth profile reference plane Normal plane Tooth thickness 6.75 Tooth profile Full depth tooth Module 3 Tooth thicknessOver pin (ball) size (ball dia=5.000) Rack Pressure angle 20 Finishing Pinion cutting Number of teeth 84 Precision KS B 1405
22、class 5 Helix angle 29.6333 (2938) * Lead Helix direction As indicated Reference diameter 289.918 RemarkBacklash * Material * Heat treatment * Hardness 0.150.69SCM 435Quen/tempHB241-302Fig 3. Internal helical gear (Example of indication) 979.0221.0219.283+EDS-A-1021DRAWING PRACTICE FOR GEARS PAGE: 6
23、/16 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 3 GM DAEWOO Auto & Technology Unit : mmDouble helical gear Tooth profile Standard Tooth profile reference plane Normal plane Tooth profile Full depth tooth Tooth thicknessChordal thickness (normal plane) (Caliper=10.05) Module 10 Fini
24、shing Hobbing Basic rack Pressure angle 20 Precision KS B 1405 Class 5Number of teeth 92 Helix angle 25 Helix direction As indicated * Lead Reference diameter 1015.105 Whole depth 22.5 RemarkNumber of teeth of mating gear Center distance Backlash * Material * Heat treatment * Hardness 20617.890.30.8
25、5Fig 4. Double helical gear (Example of indication) 15.050.071.15+EDS-A-1021DRAWING PRACTICE FOR GEARS PAGE: 7/16 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 3 GM DAEWOO Auto & Technology Unit : mmScrew gear Division Pinion (gear) Division Pinion (gear)Tooth profile Standard Thickn
26、ess (Normal plane) Tooth profile reference plane Normal plane Chordal thickness (Normal plane) (Caliper=2.033)Tooth profile Full depth tooth Tooth thicknessOver pin (ball) size Module 2 Finishing Hobbing Basic rack Pressure angle 20 Precision KS B 1405 C 4 Number of teeth 13 (26) Shaft angle 90 Heli
27、x angle 45 (45) Helix direction right-hand * Lead 115.51 Reference diameter 36.769 (73.539)Remark Backlash 0.110.4 Fig 5. Screw gear (Example of indication) 06.019.014.3+EDS-A-1021DRAWING PRACTICE FOR GEARS PAGE: 8/16 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 3 GM DAEWOO Auto & T
28、echnology Unit : mmStraight bevel gear Division Gear (pinion) Division Gear (pinion) Tooth profile Glison Reference cone angle 60 39 (29 21)Module 6 Root angle 57 32 Pressure angle 20 Tip angle 62 28 Number of teeth 48 (27) Meas. positionExternal addendum Shaft angle 90 Tooth thick. Chordal thicknes
29、s (Normal plane)Caliper 4.14 Reference diameter 288 (162) Finishing Cutting Whole depth 13.13 Precision KS B 1412 Class 4 Addendum 4.11 Dedendum 9.02 Cone distance 165.22 RemarkBacklash Tooth contact * Material * Heat treatment * Effec. hard. depth * Hardness 0.20.5KS B 1417 Div. BSCM 420H0.91.4HRC
30、603Fig 6. Straight bevel gear (Example of indication) 10.015.008.8+EDS-A-1021DRAWING PRACTICE FOR GEARS PAGE: 9/16 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 3 GM DAEWOO Auto & Technology Unit : mmSpiral bevel gear Division Gear (pinion) Division Gear (pinion)Tooth profile Glison
31、Cone distance 159.41 Tooth cutting Sprayed blade Reference cone angle 60 24 (29 36)Cutter diameter 304.8 Root angle 57 27 Module 6.3 Tip angle 62 09 Pressure angle 20 Meas. positionExternal addendum Number of teeth 44 (25) Tooth thicknessChordal thickness (Normal plane)8.06 Shaft angle 90 Finishing
32、Grinding Spiral angle 35 Precision KS B 1412 Class 4 Spiral direction Right-hand Reference diameter 277.2 Whole depth 11.89 Addendum 3.69 Dedendum 8.20 Remark Backlash * Material * Heat treatment * Effec. hard. depth * Hardness (surface) 0.180.23SCM 420 HCarbu/quench1.01.5 HRC 603Fig 7. Spiral bevel
33、 gear (Example of indication) EDS-A-1021DRAWING PRACTICE FOR GEARS PAGE: 10/16 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 3 GM DAEWOO Auto & Technology Unit : mmHypoid gear Division Gear (pinion) Division Gear (pinion) Tooth profile Glison Cone distance 108.85 Tooth cutting Form t
34、ooth cutting Reference cone angle 74 43 Cutter diameter 228.6 Root angle 68 25 Module 5.12 Tip angle 76 0 Pressure angle 21.15 Meas. position16 mm from external addendumNumber of teeth 41 Tooth thicknessChordal thickness (Normal plane)4.148 Caliper=1.298 Shaft angle 90 Finishing Lapping Spiral angle
35、 26 25 (50 0) Precision KS B 1412 Class 3 Spiral direction Right-hand Offset 38 Offset direction downward Reference diameter 210 Whole depth 10.886 Addendum 1.665 Dedendum 9.231 RemarkBacklash Tooth contact * Material * Heat treatment * Effec. hard. depth * Hardness 0.150.25 KS B 1417 Div. BSCM 420
36、H Carburizing quenching tempering 0.80.3 HRC 603 Fig 8. Hypoid gear (Example of indication) EDS-A-1021DRAWING PRACTICE FOR GEARS PAGE: 11/16 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 3 GM DAEWOO Auto & Technology Unit : mmWorm Tooth profile KS B 1416 Class 3 Axial module 8 Chorda
37、l thickness (Normal plane) Caliper = 8 Number of threads 2 Twisting direction Right-hand Tooth thickness Over pin size Pin diameter Reference cone angle 80 Diameter quotient 10.00 Lead angle 11 18 36“ Finishing Grinding * Precision RemarkBacklash Center distance Tooth contact * Material * Heat treat
38、ment * Hardness 0.210.36200KS B 1417 Div. BSM 48CInduction quenchHRC 50-55Fig 9. Worm (Example of indication) 015.032.12EDS-A-1021DRAWING PRACTICE FOR GEARS PAGE: 12/16 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 3 GM DAEWOO Auto & Technology Unit : mmWorm wheel gear Mating worm to
39、oth profile KS B 1416 Class 3 Finishing Hobbing Axial module 8 * Precision Number of teeth 40 Backlash 0.210.35 (pitch circle circumference direction) Reference cone angle 320 Reference tooth Chordal thickness (Normal plane) 12.32 Number of threads 2 thickness Caliper tooth height 8.12Twisting direc
40、tion Right-hand Addendum modification 0 Reference cone angle 80 Tooth contact KS B 1417 Division BMating worm Lead angle 11 18 36“ * Material PBC 2B Fig 10. Worm wheel (Example of indication) EDS-A-1021DRAWING PRACTICE FOR GEARS PAGE: 13/16 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSIO
41、N: 3 GM DAEWOO Auto & Technology Fig 11. Representation of detailed tooth profile and dimension measurement method (Example of indication) Fig 12. Tooth chamfering (Example of indication) Fig 13. Sector gear (Example of indication) EDS-A-1021DRAWING PRACTICE FOR GEARS PAGE: 14/16 ISSUED DATE: 1996.
42、04. 10 REVISED DATE: 2008. 05. 31 VERSION: 3 GM DAEWOO Auto & Technology Fig 14. Rack (Example of indication) (a) Spur gear (b) Bevel gear Fig 15. A pair of engaged gears (a) Spur gear (b) Helical gear (c) Double helical gear Fig 16. Sketch of a pair of engaged gears EDS-A-1021DRAWING PRACTICE FOR G
43、EARS PAGE: 15/16 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 3 GM DAEWOO Auto & Technology Fig 17. Sketch of a series spur gears Fig 18. Sketch of engaged screw gears (a) Bevel gear (b) Bevel gear Fig 19. Sketch of engaged bevel gears EDS-A-1021DRAWING PRACTICE FOR GEARS PAGE: 16/1
44、6 ISSUED DATE: 1996. 04. 10 REVISED DATE: 2008. 05. 31 VERSION: 3 GM DAEWOO Auto & Technology (c) Bevel gear (d) Spiral bevel gear (e) Hypoid gear (a) (b) Fig 20. Sketch of engaged worm and worm wheel 3. RELATED STANDARDS KS B 1405 Precision of spur gear and helical gear KS B 1412 Precision of bevel gear KS B 1417 Contact of gear tooth
