Overview of Chapter 1 (1)
1. 1 purpose, content and task of curriculum design (1)
1.2 General steps of course design (2)
1.3 (3) Several problems that should be treated correctly in curriculum design.
Chapter II Overall Design of Mechanical Transmission System (4)
2. 1 Draw up the transmission system scheme (4)
2.2 Selection of prime mover type and parameters (6)
2.2. 1 Select the type and structure of the motor (7)
2.2.2 Select the capacity of the motor (7)
2.2.3 Determine the speed of the motor (8)
2.3 Total transmission ratio of mechanical transmission system and distribution of transmission ratios at all levels (8)
2.3. 1 general principles of transmission ratio distribution (8)
2.3.2 Reference Data of Transmission Ratio Distribution (9)
2.4 Calculation of Motion and Dynamic Parameters of Mechanical Transmission System (10)
2.5 overall design example of mechanical transmission system (1 1)
Chapter III Structure, Lubrication and Sealing of Reducer (15)
3. 1 Types, characteristics and applications of reducers (15)
3.2 Structure of reducer (17)
Reducer box structure (17)
3.3 Lubrication of Reducer (20)
3.3. 1 Lubrication of gear and worm drive (20)
Lubrication of rolling bearing (23)
3.4 Sealing of reducer (25)
Shaft end seal (25)
3.4.2 Seal (26) on the inner side of bearing chamber
3.4.3 Sealing in other places (27)
3.5 reducer accessories (27)
The fourth chapter design and calculation of transmission parts (29)
4. 1 Design of external driving parts (29)
4.2 Design and calculation of internal transmission parts (3 1)
The fifth chapter reducer assembly sketch design (38)
5. 1 Design Overview of Assembly Drawing of Reducer (38)
5.2 Initial sketch of reducer assembly (39)
5.3 Check calculation of shaft and bearing (44)
5.4 Complete the assembly sketch design of the reducer (45)
Chapter VI Working Diagram Design of Reducer Parts (59)
6. 1 Basic requirements of parts construction drawing (59)
6.2 Construction drawing design of shaft parts (60)
6.3 Construction drawing design of gear parts (6 1)
6.4 Working Diagram Design of Box Parts (63)
6.5 Design of reducer accessories (68)
Chapter VII Assembly Drawing Design of Reducer (73)
7. 1 Requirements for assembly drawing of reducer (73)
7.2 reducer assembly drawing content (73)
Chapter VIII Compilation and Defense of Design Calculation Instructions (78)
8. 1 Requirements of design calculation instructions (78)
8.2 Contents of Design Calculation (78)
8.3 Design Calculation Form (79)
8.4 Course Design Defense (8 1)
8.4. 1 Course Design Summary (8 1)
8.4.2 The purpose, preparation and problems of curriculum design defense (82)
Chapter 9 Design Theme (86)
9. 1 Design the power and transmission device of belt conveyor (86)
9.2 Design the power and transmission device of the screw conveyor (88)
9.3 Design the power and transmission device of the hoist (90)
9.4 Design NGW planetary gear reducer (9 1)
The second part is the commonly used standards and norms of mechanical design curriculum design.
Chapter 10 General Data and General Standards (93)
10. 1 Common data (93)
10. 1. 1 density of common materials (table 10- 1) (93)
10.10.2 elastic modulus and poisson's ratio of common materials (table 10-2) (94)
10. 1.3 melting point, thermal conductivity and specific heat capacity of metallic materials (table 10-3) (94)
10. 1.4 coefficient of linear expansion of common materials (table 10-4) (94)
10. 1.5 Approximate relationship of ultimate strength of common materials (Table 10-5) (95)
10. 1.6 hardness value comparison table (table 10-6) (95)
10. 1.7 Common standard codes (table 10-7) (96)
10. 1.8 Common legal units of measurement and their conversion (Table 10-8) (96)
10.10.9 coefficient of friction of common materials (table 10-9, table10-0/0) (97)
10. 1. 10 Efficiency and transmission ratio range of mechanical transmission and bearing (table 10- 10, table 10- 12) (98)
10.1.11Greek letters (table 10- 13) (99)
10.2 general standard (100)
10.2. 1 drawing scale, width and format (table 10- 14, table10-15) (100).
10.2.2 serial number and arrangement of parts in the assembly drawing (10 1)
10.2.3 Priority numbering system and standard size (table10-16) (102)
10.2.4 central hole (table 10- 17, table10-18) (103)
10.2.5 shoulder and collar dimensions (table10-19) (104)
10.2.6 rounding and chamfering of parts (table 10-20) (105)
10.2.7 grinding wheel overtravel groove (table10-21) (105)
10.2.8 unloading groove and gear machining unloading groove (table 10-22, table 10-23, table 10-24) (106)
10.2.9 planing and slotting over-travel groove (table 10-25) (107)
10.2. 10 gear hob outer diameter (table 10-26) (108)
10.2. 1 1 series of taper and cone angle (table 10-27) (108)
10.2. 12 machine shaft height and shaft extension (table 10-28 ~ table10-31) (109)
10.2. 13 Minimum wall thickness and minimum hole size of castings (table 10-33, table 10-34, table10-35) (1/kloc-
10.2. 14 casting inclination and casting inclination are too large (table 10-36, table10-37) (115).
10.2. 15 casting fillet (table10-38) (115)
10.2. 16 casting external fillet (table10-39) (116)
10.2. 17 welding symbols and application examples (table 10-40, table10-41) (117)
Chapter 1 1 Mechanical Engineering Materials (1 19)
1 1. 1 ferrous material (1 19)
1 1. 1 gray cast iron (table11-1) (119)
1 1. 1.2 ductile iron (table 1 1-2) (120)
1 1. 1.3 cast steel (table11-3) (121)
1 1. 1.4 ordinary carbon structure (table 1 1-4) (122)
1 1. 1.5 high-quality carbon structural steel (table 1 1-5) (122)
1 1. 1.6 alloy structural steel (table 1 1-6) (125)
1 1.2 Non-ferrous materials (127)
1 1.2. 1 cast copper alloy (table 1 1-7) (127).
1 1.2.2 cast aluminum alloy (table 1 1-8) (129)
1 1.2.3 cast bearing alloy (table11-9) (131)
1 1.3 steel and profile (132)
1 1.3. 1 cold rolled steel plate and strip (132)
1 1.3.2 hot rolled steel plate (134)
1 1.3.3 hot rolled round steel (table11-25) (138)
1 1.3.4 cold-drawn round steel, square steel and hexagonal steel (table11-26) (140)
1 1.3.5 hot rolled equilateral angle steel (table11-27) (141)
1 1.3.6 hot-rolled unequal angle steel (table11-28) (144)
1 1.3.7 hot rolled channel steel (table11-29) (148)
1 1.3.8 hot rolled l-beam (table11-30) (149)
1 1.3.9 hot rolled I-beam (table11-31) (150)
Chapter 12 Maneuver (152)
12. 1 Y series three-phase asynchronous motors (152)
12.2 YZR and YZ series three-phase asynchronous motors for metallurgy and hoisting (165)
Chapter 13 connectors and fasteners (170)
13. 1 thread (170)
13.2 bolt (173)
13.3 stud (177)
13.4 screw (178)
13.5 nut (183)
13.6 washer (185)
13.7 structural elements of threaded parts (187)
13.8 retaining ring (190)
13.9 bond connection (194)
13. 10 pin connection (197)
Chapter 14 couplings and clutches (199)
14. 1 coupling (199)
14. 1. 1 Selection of common couplings (199)
14. 1.2 common coupling (200)
14.2 clutch (2 10)
14.2. 1 Selection of mechanical clutch (Table14-10) (210)
14.2.2 rectangular claw clutch for simple transmission (table14-11) (211)
Chapter 15 Rolling bearing (2 12)
15. 1 ordinary rolling bearing (2 12)
15.2 fit and clearance of rolling bearing (224)
15.2. 1 Matching of rolling bearing with shaft and shell (224)
15.2.2 clearance requirements for rolling bearings (228)
Chapter 16 Tolerance Fit, Form and Position Tolerance and Surface Roughness (23 1)
16. 1 limit, tolerance and fit (23 1)
16. 1. 1 terms and definitions (23 1)
16. 1.2 standard tolerance level (232)
Select 16. 1.3 tolerance zone (234)
16. 1.4 Select coordinates (235)
16.2 geometric tolerance (247)
16.2. 1 terms and definitions (247)
16.2.2 Types and symbols of form and position tolerances (generation) (248)
16.2.3 Marking tolerance value of form and position tolerance and application example (249)
16.3 surface roughness (253)
16.3. 1 Parameters for evaluating surface roughness and their numerical series (253)
16.3.2 Symbol and marking method of surface roughness (253)
16.3.3 Surface Roughness Achievable by Different Machining Methods (Table 16- 19) (255)
Chapter 17 Gear and Worm Transmission Accuracy (258)
17. 1 involute cylindrical gear accuracy (258)
17. 1. 1 definition and code (258)
17. 1.2 accuracy and its selection (259)
17. 1.3 limit deviation (table 17-6) (260)
17.2 bevel gear accuracy (264)
17.2. 1 definition and code of bevel gear and gear pair error and backlash (264)
17.2.2 accuracy grade (266)
17.2.3 tolerance group and inspection items (266)
17.2.4 backlash of gear pair (27 1)
17.2.5 Drawing marking (274)
17.2.6 bevel gear blank tolerance (275)
17.3 Accuracy of cylindrical worm and worm wheel (276)
17.3. 1 worm, worm wheel and worm pair terms definition and code (276)
17.3.2 accuracy class and tolerance group (278)
17.3.3 tolerance of worm, worm wheel and transmission (279)
17.3.4 backlash of worm drive (282)
17.3.5 gear blank tolerance and surface roughness of worm gear (284)
17.3.6 Drawing marking (285)
Chapter 18 Lubrication and sealing (287)
18. 1 lubricant (287)
18.2 lubricating device (288)
18.2. 1 Common lubricating device for intermittent lubrication (288)
18.2.2 dipstick and dipstick (290)
18.3 sealing device (292)
The third part reducer reference legend
Chapter 19 assembly drawing of reducer (297)
Chapter 20 Reducer Parts Drawing (300)
References (3 12)