Some standard content:
Mechanical Industry Standard of the People's Republic of China
Fully Enclosed Sugarcane Press Reducer
Subject Content and Scope of Application
JB/T6121---92
This standard specifies the type and basic dimensions, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of fully enclosed sugarcane press reducers.
The reducers specified in this standard are applicable to sugarcane press main drives and are also applicable to other units that meet the working specifications of this reducer.
Referenced Standards
2
GB 1184
Shape and Position Tolerances
GB 1356
GB 1357
GB9439
Involute cylindrical gear
Provisions for unmarked tolerances
Basic tooth profile
Module
Involute cylindrical gear
Grey cast iron parts
GB10095 Involute cylindrical gear
Precision
JB/ZQ4000.10 General technical conditions for painting Type and size
3
3.1 Assembly type and overall dimensions
The fully enclosed Ganxiong press reducer is divided into TB type reducer, TC type reducer and TD type reducer. 3.1.1 The overall dimensions and assembly type of TB type reducer are shown in Figure 1 and Table 1. 3.1.2 The overall dimensions and assembly type of TC type reducer are shown in Figure 2 and Table 2. 3.1.3 The overall dimensions of TD type reducer are shown in Figure 3 and Table 3. Approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on June 9, 1992118
Implementation on January 1, 1993
JB/T 6121-92
Hui
119
92
JB/T 6121
99268
0028
000 7
quality
088
big
utu
00t
ofe
1
ofe
D
o2
02
2
0
5
60
90f
91
091
091
0
axis
089
8
GO
on
o
88
inch
!
S8
091
People
F
Feet
on
966
000
086
s
9
28
O
8
ground
002
056
008
008
89
099
08S
08
1
EO
006
ot
008
000
29
099
ost
08
0
08
029
089
OGO
026
19
086
612981
98
so
002
002
089
099
8
ruler
axis
29782
002
2
2929
in
and
ost
ss
out
006
o191
o
07
0228
.
.1.
TH.I
Each side
WI
CH.
.1
i
086
2
IFL.I.
Storage
120
2.
F
JB/T 6121- 92
121
122
H
JB/T 612192
92
IB/T 6121-
S
Quality
Axis
029
887
Year
Ruler
II
1
r
1
191
19
tt
3
9
Axis
5
3
09 1
1
Work
1
S6
261
s
Foot
082
080
080
688
3
Table
Foot
Ground
00G
OS2
2
Table
.
6
8
otb
8
8888
068
068
2
09
S8
sa8
+0
06f
066
066
60
8
695
6
699
008
008
8
0
寸
989
外
4
009
3|| tt||62
3
Shaft
State
Scale
Shaft
Output
091
C
026
01
No.
No.
Type
Transmission
Type
12.
3.2 Model Example
3.2.1 Model Representation Method
TB Type Reducer
[
TY Type Reducer
TC
TI5 Reducer
T)
5
3.2.2 Example
a.
JB/T 6121 -- 92
Shaft type (F: square: no symbol: cylindrical) Nominal transmission ratio
Assembly type
Frame number
Ganyan press reducer code
Nominal transmission ratio
Assembly type
Frame number
Ganyan press reducer code
Frame number
Sugarcane press reducer code
TB4 reducer nominal transmission ratio i=-71. The second type of assembly type. The output shaft type is cylindrical, expressed as: TB1Ⅱ71TC3 reducer nominal transmission ratio; =150. The first type of assembly type is expressed as: TC3-1~150h.
4 Basic parameters
4.1 Reducer center distance
TB type reducer center distance should comply with the provisions of Table 4 4. 1. 1
4
Model
No.
TR1
T32
T153
r34
124
First level
150
500
520
560
Center
Second level
650
710
750
85
Second
4.1.2
JB/T 6121-1
92
The center distance of TC type inverter should comply with the requirements of Table 5. Table 5
Type
TC1
TC2
TC3, T3A
4.1.3
Level
450
4.50
450
TI)5 The center distance of the reducer should comply with the provisions of Table 6, type
No.
Level
T15Www.bzxZ.net
4.2 reducer nominal transmission ratio
4.2. 1
type
880
medium
second level||tt| |650
650
650
Table 6
中
Second stage
1478
TB type reducer The nominal transmission ratio should comply with the table? The regulations for Pei?
No.
TH1
TB2
TE3
TB1
4.2.2
Type
31.5
31.5
31.5
56
40
40
40
63
50|| tt||50
50
71
public
63
63
63
75||tt| |attack
The nominal transmission ratio of TC type reducer should comply with the provisions of Table 8. Table 8
No.
TC1
TC2
TC3.TC3A
56
71
75||tt| |67
85
90
Biography
75
75
75
85
public
Weighing
85
140
150
Heart
Heart
Movement
Transmission|| tt||ratio
8
th "level
1000
1000
1)
E
th" Level
2050
80
80
112
motion
ratio
112
170| |tt||180
90
90
91)
125
132
I(F
Eagle level
330
175
2H
Level 4
270
1 o
10||tt ||156
rm
rm
125
12.
17
7
3TD5 reducer nominal transmission Ratio: The nominal transmission ratio of the output shaft to I is 100; the nominal transmission ratio of the Shishan shaft is 67. 4.2.3
4.3 The relative error between the actual transmission ratio of the reducer and the nominal transmission ratio 4.3.1TB type reducer is not greater than 5%.
4.3.2TC type reducer is not more than 5%.
4.3.3T) type reducer is not more than 5%.
4.4 The gear module should comply with the provisions of GB1357. The gear module selected in this standard is shown in Table 9. 125
Due to the wheel module
JB/T 6121--92|| tt||Table 9
8
4.5 The basic tooth profile of the gear should comply with the provisions of GB1356 5 Technical Requirements
5.1 Technical Requirements
12||tt| |14
piece
5.1.1 The reducer shall comply with the requirements of this standard and be manufactured according to the drawings and documents approved by the prescribed procedures. 5.1.2 Reducer efficiency: the first level is not less than 0.93; the fourth level is not less than 0.915.1.3 The high reverse shaft speed is not more than 1000r/min. nm
20
5.1.4 The working environment temperature of the reducer is 5~35C. When it is lower than 5C, a heating device must be added, and when it is higher than 35C, a cooling device must be added. 5.1.5 Inside the reducer box The temperature rise of the lubricating oil shall not be higher than 35C, and the temperature rise of the bearing shall not be higher than 10(. 5.1.6 The noise of the reducer shall not be greater than 85dB (A). 5.1.7 The vibration displacement of a single room of the reducer box shall not be greater than 0.05mm. 5.1.8 The reducer must be operated with no load before operation or after shutdown for more than 4 hours. It can be operated with load after confirming that the noise, vibration and lubrication are normal.
5.2 Manufacturing technical requirements for main parts
5.2 .1 Body, machine cover, oil pool
5.2.1.1 The body material shall not be lower than the performance requirements of HT200 specified in B9439. 5.2.1.2 No oil leakage is allowed in the seals of the body, machine cover and oil pool 5.2.1.3 The machine body, machine cover should be roughened 1, and the welded machine cover and oil pool should be stress relieved after welding. 5.2.1.4 The tolerance zone of each bearing hole is H7
5.2.1.5 Bearing hole + center distance limit deviation. f should comply with the level 7 regulations of GB10095. 5.2.1.6 The parallelism tolerance of the bearing hole center line is measured on the bearing span. \The parallelism tolerance of the axis direction is 1. (1) The parallelism tolerance of the y-axis direction is 1. (I/) Bearing span.mm;
where ·
\ gear width.mm
1f, should comply with the 5.2.1.7 co-axial requirements of GB10095. The coaxiality of the two bearing holes is in accordance with the level 6 accuracy requirements of GB1184. 5.2.1.8 The parallelism deviation between the split surface of the body and the bottom plane is 0.05/1000. 5.2.2 Gears, gear shafts, shafts
5.2.2.1 The gear shaft and integral gear are made of 20CrNi2MoA forgings, and the heat treatment and mechanical properties should comply with the requirements in Table 10, or materials with mechanical properties no less than that of carburizing and quenching should be used. The effective hardened layer depth after tooth surface finishing is (0.2~0.25)M. .No fire and other cracks are allowed on the tooth surface:
5.2.2.2 The large gear adopts an inlaid ring structure, and the hub material is not less than the 200HT performance requirements specified in GB9439; the ring gear is made of 4.2CrM010CrMnMo, 40CrNi2MoA forgings. Mechanical properties It should comply with the requirements of Table 10, or use materials with mechanical properties no less than that. 5.2.2.3 The output shaft should be made of 45 steel, and its mechanical properties should comply with the requirements of Table 10. 5.2.2.4 The tolerance zone of the gear reference hole is H7. The radial and end face runout of the datum surface conforms to the GB10095 level 7 accuracy regulations. The tolerance zone of the journal of the gear shaft, shaft and bearing in 5.2.2.5 is m6. The end face runout of the shaft shoulder where the bearing is installed is in accordance with the level 6 accuracy regulations of G131184. The two datums The coaxiality of the shaft diameter is in accordance with the level 6 accuracy requirements of GB1184: the coaxiality of the gear shaft diameter and the reference shaft diameter is in accordance with the level 6 accuracy requirements of GB1181,
5.2.2.6 Broken rings, gear shafts, shafts Perform ultrasonic flaw detection inspection. 126
5
56
40
40
40
63
50
50
50| |tt||71
public
63
63
63
75
attack
TC type reducer The nominal transmission ratio should comply with the provisions of Table 8. Table 8
No.
TC1
TC2
TC3.TC3A
56
71
75||tt| |67
85
90
Biography
75
75
75
85
public
Weighing
85
140
150
Heart
Heart
Movement
Transmission|| tt||ratio
8
th "level
1000
1000
1)
E
th" Level
2050
80
80
112
motion
ratio
112
170| |tt||180
90
90
91)
125
132
I(F
Eagle level
330
175
2H
Level 4
270
1 o
10||tt ||156
rm
rm
125
12.
17
7
3TD5 reducer nominal transmission Ratio: The nominal transmission ratio of the output shaft to I is 100; the nominal transmission ratio of the Shishan shaft is 67. 4.2.3
4.3 The relative error between the actual transmission ratio of the reducer and the nominal transmission ratio 4.3.1TB type reducer is not greater than 5%.
4.3.2TC type reducer is not more than 5%.
4.3.3T) type reducer is not more than 5%.
4.4 The gear module should comply with the provisions of GB1357. The gear module selected in this standard is shown in Table 9. 125
Due to the wheel module
JB/T 6121--92|| tt||Table 9
8
4.5 The basic tooth profile of the gear should comply with the provisions of GB1356 5 Technical Requirements
5.1 Technical Requirements
12||tt| |14
piece
5.1.1 The reducer shall comply with the requirements of this standard and be manufactured according to the drawings and documents approved by the prescribed procedures. 5.1.2 Reducer efficiency: the first level is not less than 0.93; the fourth level is not less than 0.915.1.3 The high reverse shaft speed is not more than 1000r/min. nm
20
5.1.4 The working environment temperature of the reducer is 5~35C. When it is lower than 5C, a heating device must be added, and when it is higher than 35C, a cooling device must be added. 5.1.5 Inside the reducer box The temperature rise of the lubricating oil shall not be higher than 35C, and the temperature rise of the bearing shall not be higher than 10(. 5.1.6 The noise of the reducer shall not be greater than 85dB (A). 5.1.7 The vibration displacement of a single room of the reducer box shall not be greater than 0.05mm. 5.1.8 The reducer must be operated with no load before operation or after shutdown for more than 4 hours. It can be operated with load after confirming that the noise, vibration and lubrication are normal.
5.2 Manufacturing technical requirements for main parts
5.2 .1 Body, machine cover, oil pool
5.2.1.1 The body material shall not be lower than the performance requirements of HT200 specified in B9439. 5.2.1.2 No oil leakage is allowed in the seals of the body, machine cover and oil pool 5.2.1.3 The machine body, machine cover should be roughened 1, and the welded machine cover and oil pool should be stress relieved after welding. 5.2.1.4 The tolerance zone of each bearing hole is H7
5.2.1.5 Bearing hole + center distance limit deviation. f should comply with the level 7 regulations of GB10095. 5.2.1.6 The parallelism tolerance of the bearing hole center line is measured on the bearing span. \The parallelism tolerance of the axis direction is 1. (1) The parallelism tolerance of the y-axis direction is 1. (I/) Bearing span.mm;
where ·
\ gear width.mm
1f, should comply with the 5.2.1.7 co-axial requirements of GB10095. The coaxiality of the two bearing holes is in accordance with the level 6 accuracy requirements of GB1184. 5.2.1.8 The parallelism deviation between the body split surface and the bottom plane is 0.05/1000. 5.2.2 Gears, gear shafts, shafts
5.2.2.1 The gear shaft and integral gear are made of 20CrNi2MoA forgings, and the heat treatment and mechanical properties should comply with the requirements in Table 10, or materials with mechanical properties no less than that of carburizing and quenching should be used. The effective hardened layer depth after tooth surface finishing is (0.2~0.25)M. .No fire and other cracks are allowed on the tooth surface:
5.2.2.2 The large gear adopts an inlaid ring structure, and the hub material is not less than the 200HT performance requirements specified in GB9439; the ring gear is made of 4.2CrM010CrMnMo, 40CrNi2MoA forgings. Mechanical properties It should comply with the requirements of Table 10, or use materials with mechanical properties no less than that. 5.2.2.3 The output shaft should be made of 45 steel, and its mechanical properties should comply with the requirements of Table 10. 5.2.2.4 The tolerance zone of the gear reference hole is H7. The radial and end face runout of the datum surface conforms to the GB10095 level 7 accuracy regulations. The tolerance zone of the journal of the gear shaft, shaft and bearing in 5.2.2.5 is m6. The end face runout of the shaft shoulder where the bearing is installed is in accordance with the level 6 accuracy regulations of G131184. The two datums The coaxiality of the shaft diameter is in accordance with the level 6 accuracy requirements of GB1184: the coaxiality of the gear shaft diameter and the reference shaft diameter is in accordance with the level 6 accuracy requirements of GB1181,
5.2.2.6 Broken rings, gear shafts, shafts Perform ultrasonic flaw detection inspection. 126
5
56
40
40
40
63
50
50
50| |tt||71
public
63
63
63
75
attack
TC type reducer The nominal transmission ratio should comply with the provisions of Table 8. Table 8
No.
TC1
TC2
TC3.TC3A
56
71
75||tt| |67
85
90
Biography
75
75
75
85
public
Weighing
85
140
150
Heart
Heart
Movement
Transmission|| tt||ratio
8
th "level
1000
1000
1)
E
th" Level
2050
80
80
112
motion
ratio
112
170| |tt||180
90
90
91)
125
132
I(F
Eagle level
330
175
2H
Level 4
270
1 o
10||tt ||156
rm
rm
125
12.
17
7
3TD5 reducer nominal transmission Ratio: The nominal transmission ratio of the output shaft to I is 100; the nominal transmission ratio of the Shishan shaft is 67. 4.2.3
4.3 The relative error between the actual transmission ratio of the reducer and the nominal transmission ratio 4.3.1TB type reducer is not greater than 5%.
4.3.2TC type reducer is not more than 5%.
4.3.3T) type reducer is not more than 5%.
4.4 The gear module should comply with the provisions of GB1357. The gear module selected in this standard is shown in Table 9. 125
Due to the wheel module
JB/T 6121--92|| tt||Table 9
8
4.5 The basic tooth profile of the gear should comply with the provisions of GB1356 5 Technical Requirements
5.1 Technical Requirements
12||tt| |14
piece
5.1.1 The reducer shall comply with the requirements of this standard and be manufactured according to the drawings and documents approved by the prescribed procedures. 5.1.2 Reducer efficiency: the first level is not less than 0.93; the fourth level is not less than 0.915.1.3 The high reverse shaft speed is not more than 1000r/min. nm
20
5.1.4 The working environment temperature of the reducer is 5~35C. When it is lower than 5C, a heating device must be added, and when it is higher than 35C, a cooling device must be added. 5.1.5 Inside the reducer box The temperature rise of the lubricating oil shall not be higher than 35C, and the temperature rise of the bearing shall not be higher than 10(. 5.1.6 The noise of the reducer shall not be greater than 85dB (A). 5.1.7 The vibration displacement of a single room of the reducer box shall not be greater than 0.05mm. 5.1.8 The reducer must be operated with no load before operation or after shutdown for more than 4 hours. It can be operated with load after confirming that the noise, vibration and lubrication are normal.
5.2 Manufacturing technical requirements for main parts
5.2 .1 Body, machine cover, oil pool
5.2.1.1 The body material shall not be lower than the performance requirements of HT200 specified in B9439. 5.2.1.2 No oil leakage is allowed in the seals of the body, machine cover and oil pool 5.2.1.3 The machine body, machine cover should be roughened 1, and the welded machine cover and oil pool should be stress relieved after welding. 5.2.1.4 The tolerance zone of each bearing hole is H7
5.2.1.5 Bearing hole + center distance limit deviation. f should comply with the level 7 regulations of GB10095. 5.2.1.6 The parallelism tolerance of the bearing hole center line is measured on the bearing span. \The parallelism tolerance of the axis direction is 1. (1) The parallelism tolerance of the y-axis direction is 1. (I/) Bearing span.mm;
where ·
\ gear width.mm
1f, should comply with the 5.2.1.7 co-axial requirements of GB10095. The coaxiality of the two bearing holes is in accordance with the level 6 accuracy requirements of GB1184. 5.2.1.8 The parallelism deviation between the body split surface and the bottom plane is 0.05/1000. 5.2.2 Gears, gear shafts, shafts
5.2.2.1 The gear shaft and integral gear are made of 20CrNi2MoA forgings, and the heat treatment and mechanical properties should comply with the requirements in Table 10, or materials with mechanical properties no less than that of carburizing and quenching should be used. The effective hardened layer depth after tooth surface finishing is (0.2~0.25)M. .No fire and other cracks are allowed on the tooth surface:
5.2.2.2 The large gear adopts an inlaid ring structure, and the hub material is not less than the 200HT performance requirements specified in GB9439; the ring gear is made of 4.2CrM010CrMnMo, 40CrNi2MoA forgings. Mechanical properties It should comply with the requirements of Table 10, or use materials with mechanical properties no less than that. 5.2.2.3 The output shaft should be made of 45 steel, and its mechanical properties should comply with the requirements of Table 10. 5.2.2.4 The tolerance zone of the gear reference hole is H7. The radial and end face runout of the datum surface conforms to the GB10095 level 7 accuracy regulations. The tolerance zone of the journal of the gear shaft, shaft and bearing in 5.2.2.5 is m6. The end face runout of the shaft shoulder where the bearing is installed is in accordance with the level 6 accuracy regulations of G131184. The two datums The coaxiality of the shaft diameter is in accordance with the level 6 accuracy requirements of GB1184: the coaxiality of the gear shaft diameter and the reference shaft diameter is in accordance with the level 6 accuracy requirements of GB1181,
5.2.2.6 Broken rings, gear shafts, shafts Perform ultrasonic flaw detection inspection. 126
1 The reducer should comply with the requirements of this standard and be manufactured according to the drawings and documents approved by the prescribed procedures. 5.1.2 Reducer efficiency: the first level is not less than 0.93; the fourth level is not less than 0.915.1.3 The high reverse shaft speed is not more than 1000r/min. nm
20
5.1.4 The working environment temperature of the reducer is 5~35C. When it is lower than 5C, a heating device must be added, and when it is higher than 35C, a cooling device must be added. 5.1.5 Inside the reducer box The temperature rise of the lubricating oil shall not be higher than 35C, and the temperature rise of the bearing shall not be higher than 10(. 5.1.6 The noise of the reducer shall not be greater than 85dB (A). 5.1.7 The vibration displacement of a single room of the reducer box shall not be greater than 0.05mm. 5.1.8 The reducer must be operated with no load before operation or after shutdown for more than 4 hours. It can be operated with load after confirming that the noise, vibration and lubrication are normal.
5.2 Manufacturing technical requirements for main parts
5.2 .1 Body, machine cover, oil pool
5.2.1.1 The body material shall not be lower than the performance requirements of HT200 specified in B9439. 5.2.1.2 No oil leakage is allowed in the seals of the body, machine cover and oil pool 5.2.1.3 The machine body, machine cover should be roughened 1, and the welded machine cover and oil pool should be stress relieved after welding. 5.2.1.4 The tolerance zone of each bearing hole is H7
5.2.1.5 Bearing hole + center distance limit deviation. f should comply with the level 7 regulations of GB10095. 5.2.1.6 The parallelism tolerance of the bearing hole center line is measured on the bearing span. \The parallelism tolerance of the axis direction is 1. (1) The parallelism tolerance of the y-axis direction is 1. (I/) Bearing span.mm;
where ·
\ gear width.mm
1f, should comply with the 5.2.1.7 co-axial requirements of GB10095. The coaxiality of the two bearing holes is in accordance with the level 6 accuracy requirements of GB1184. 5.2.1.8 The parallelism deviation between the body split surface and the bottom plane is 0.05/1000. 5.2.2 Gears, gear shafts, shafts
5.2.2.1 The gear shaft and integral gear are made of 20CrNi2MoA forgings, and the heat treatment and mechanical properties should comply with the requirements in Table 10, or materials with mechanical properties no less than that of carburizing and quenching should be used. The effective hardened layer depth after tooth surface finishing is (0.2~0.25)M. .No fire and other cracks are allowed on the tooth surface:
5.2.2.2 The large gear adopts an inlaid ring structure, and the hub material is not less than the 200HT performance requirements specified in GB9439; the ring gear is made of 4.2CrM010CrMnMo, 40CrNi2MoA forgings. Mechanical properties It should comply with the requirements of Table 10, or use materials with mechanical properties no less than that. 5.2.2.3 The output shaft should be made of 45 steel, and its mechanical properties should comply with the requirements of Table 10. 5.2.2.4 The tolerance zone of the gear reference hole is H7. The radial and end face runout of the datum surface conforms to the GB10095 level 7 accuracy regulations. The tolerance zone of the journal of the gear shaft, shaft and bearing in 5.2.2.5 is m6. The end face runout of the shaft shoulder where the bearing is installed is in accordance with the level 6 accuracy regulations of G131184. The two datums The coaxiality of the shaft diameter is in accordance with the level 6 accuracy requirements of GB1184: the coaxiality of the gear shaft diameter and the reference shaft diameter is in accordance with the level 6 accuracy requirements of GB1181,
5.2.2.6 Broken rings, gear shafts, shafts Perform ultrasonic flaw detection inspection. 126
1 The reducer should comply with the requirements of this standard and be manufactured according to the drawings and documents approved by the prescribed procedures. 5.1.2 Reducer efficiency: the first level is not less than 0.93; the fourth level is not less than 0.915.1.3 The high reverse shaft speed is not more than 1000r/min. nm
20
5.1.4 The working environment temperature of the reducer is 5~35C. When it is lower than 5C, a heating device must be added, and when it is higher than 35C, a cooling device must be added. 5.1.5 Inside the reducer box The temperature rise of the lubricating oil shall not be higher than 35C, and the temperature rise of the bearing shall not be higher than 10(). 5.1.6 The noise of the reducer shall not be greater than 85dB (A). 5.1.7 The vibration displacement of a single room of the reducer box shall not be greater than 0.05mm. 5.1.8 The reducer must be operated with no load before operation or after shutdown for more than 4 hours. It can be operated with load after confirming that the noise, vibration and lubrication are normal.
5.2 Manufacturing technical requirements for main parts
5.2 .1 Body, machine cover, oil pool
5.2.1.1 The body material shall not be lower than the performance requirements of HT200 specified in B9439. 5.2.1.2 No oil leakage is allowed in the seals of the body, machine cover and oil pool 5.2.1.3 The machine body, machine cover should be roughened 1, and the welded machine cover and oil pool should be stress relieved after welding. 5.2.1.4 The tolerance zone of each bearing hole is H7
5.2.1.5 Bearing hole + center distance limit deviation. f should comply with the level 7 regulations of GB10095. 5.2.1.6 The parallelism tolerance of the bearing hole center line is measured on the bearing span. \The parallelism tolerance of the axis direction is 1. (1) The parallelism tolerance of the y-axis direction is 1. (I/) Bearing span.mm;
where ·
\ gear width.mm
1f, should comply with the 5.2.1.7 co-axial requirements of GB10095. The coaxiality of the two bearing holes is in accordance with the level 6 accuracy requirements of GB1184. 5.2.1.8 The parallelism deviation between the body split surface and the bottom plane is 0.05/1000. 5.2.2 Gears, gear shafts, shafts
5.2.2.1 The gear shaft and integral gear are made of 20CrNi2MoA forgings, and the heat treatment and mechanical properties should comply with the requirements in Table 10, or materials with mechanical properties no less than that of carburizing and quenching should be used. The effective hardened layer depth after tooth surface finishing is (0.2~0.25)M. .No fire and other cracks are allowed on the tooth surface:
5.2.2.2 The large gear adopts an inlaid ring structure, and the hub material is not less than the 200HT performance requirements specified in GB9439; the ring gear is made of 4.2CrM010CrMnMo, 40CrNi2MoA forgings. Mechanical properties It should comply with the requirements of Table 10, or use materials with mechanical properties no less than that. 5.2.2.3 The output shaft should be made of 45 steel, and its mechanical properties should comply with the requirements of Table 10. 5.2.2.4 The tolerance zone of the gear reference hole is H7. The radial and end face runout of the datum surface conforms to the GB10095 level 7 accuracy regulations. The tolerance zone of the journal of the gear shaft, shaft and bearing in 5.2.2.5 is m6. The end face runout of the shaft shoulder where the bearing is installed is in accordance with the level 6 accuracy regulations of G131184. The two datums The coaxiality of the shaft diameter is in accordance with the level 6 accuracy requirements of GB1184: the coaxiality of the gear shaft diameter and the reference shaft diameter is in accordance with the level 6 accuracy requirements of GB1181,
5.2.2.6 Broken rings, gear shafts, shafts Perform ultrasonic flaw detection inspection. 126
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