Some standard content:
Mechanical Industry Standard of the People's Republic of China
Disc brake
Subject content and scope of application
Brake disc
JB/T 7019--93
This standard specifies the type, size, technical requirements and inspection rules of brake discs for disc brakes (hereinafter referred to as brake discs). This standard is applicable to brake discs for various types of single-disc brakes. This standard does not apply to multi-disc and wet disc brakes. 2 Reference standards GB 699 Technical conditions for high-quality carbon structural steel GB1348 Ductile iron castings GB1569 GB3077 Technical conditions for cylindrical shaft extensions Alloy structural steel GB3852 Types and sizes of coupling shaft holes and keyways GB11352 GB11357 + General engineering cast carbon steel parts Material, surface roughness and balance of pulleys General technical conditions for packaging of electromechanical products GB/T 13384
JB/ZQ4297 alloy cast steel
3 Type and size
3.1 Type
3.1.1 The type of brake disc is divided into type A brake disc and type B brake disc according to its structure. a. The structural feature of type A brake disc is that the brake disc and the wheel hub are one-piece, as shown in Figure 1. The brake disc includes a solid brake disc (codenamed S), a straight ventilation duct brake disc (codenamed Z) and a curved ventilation duct brake disc (codenamed Q). The codes of the three brake discs are: ASF, AZP.AQP
b. The structural feature of type B brake disc is that the brake disc and the wheel hub are detachably connected, as shown in Figure 2. The brake disc also includes a solid brake disc, a straight ventilation duct brake disc and a curved ventilation duct brake disc. The codes of the three brake discs are: BSP, BZP, BQP. The brake disc is not required to be completely consistent with the structure shown in the figure, but must conform to the given dimensions. 3.1.2 Model representation method
XOXDXL
Hub length 1.mm
-Shaft hole diameter d, mm
Thickness hmm
Outer diameter dz, mm
Brake disc code
3.1.3 Marking example
Type A solid brake disc, with an outer diameter of 500mm, a thickness of 30mm, a shaft hole diameter of 80mm, and a hub length of 160mm, is marked as: Ministry of Machinery Industry of the People's Republic of China 1993-0 9-21 Approved for implementation on July 1, 1994
139
JB/T7019-.93
Brake disc ASP500×30×80X160JB/T7019-93B type curved ventilation duct brake disc. The outer diameter is 500mm, the thickness is 30mm, the shaft hole diameter is 80mm, the hub length is 160mm, and the mark is:
Brake disc BQP500×30×80X160JB/T7019.-933.2 Size
3.2.1The size of the A type brake disc shall comply with the specifications in Figure 1 and Table 1 Figure 1
Table 1
Basic dimensions
Limit deviation
A250
280
A315
355
A400
450
A500
560
A630
710
A800
900
A10004
±0.2
±0.5
15
15
30||t t||15
15
15
15
15
15
15
30
30
30
30
30
30
30
30
(42)
（42）
(42)
80)
112
112
d
max
1403
155
175
200
220
250
280
310
350
390
440
500
560
min
30
30
40
50
55
60
70
80
80
1.00||tt| |100
125
125
d,(H7)
50
A50
A60
A61
A80
A80
A80
A100
410
1120
A120
A140)
4110
Note: 1) The length of the wheel 2 is determined according to the elongation series in GB1569, and the keyway type and size are determined according to the long cylindrical shaft hole in GB3852. 2) The value with a leading edge should be used first.
ml
matx
70
2
80
90
100
100
125
125
1-10
140
160
160
3) b=15mm only solid brake disc: bz=3(mm has solid brake disc and ventilation duct brake disc; bl=42mm, h=80mm, h, 112mm has no solid brake disc. The b value in brackets is recommended to have a brake disc with a linear speed greater than 40m/s. 4) When αz is greater than 1000mm, it is recommended to use R10 series priority number,, etc. F30mm (linear speed less than 40m/s), JB/T 7019--93
3.2.2 The dimensions of type B brake discs shall conform to the provisions of Figure 2 and Table 2. Row
30
+
All spores
[Each
Figure 2
Table 2
d
Basic size limit deviation
A315
355
4400
450
$500
560
A630
710
A800
900
A10004)
0.2||t t||±0.5
±0.5
0.5
6
30
3
31
30
(42)
105
125
140
146
90
190
205
230
260
260
260
Note: 1)～) and size d, and d, see table d.
H7
85
105
115
120
160
170
190
220
220
220
I diameter
10.5
1>
2
2
25
25
25
td:
Screw Number of holes
12
12
12
12
12
12
12
12
Screw hole diameter
M10
M12
M16
M16
M20
M20
M24
M24
M24
M24
x
.,
all holes
medium
M10
M12
M16
M16
M20
M20| |tt||M20
M24
M24
M24
M24
0.3
0.5
0.5||tt ||mm
tightening torque of each bolt
N·m
51
89
215||tt| |215
420
4.20bzxz.net
420
725
725
725
725
5 ) To facilitate the replacement of the brake disc, place it on the brake disc d. There are 33 screw holes set on the circumference. , and staggered, evenly distributed 6) d: The strength grade of the bolts for the holes is not lower than grade 8.8 in GB3098.1 "Mechanical Properties of Fasteners Bolts, Screws and Studs", tighten according to the tightening torque given in Table 2,
141.
4 Technical requirements
93
JB/T 7019—
4.1 The manufacturing method and materials of brake discs are as specified in Table 3 . Table 3
Manufacturing method
Casting
Forging
or
Steel plate (cut)
4.2 Quality requirements
Material name
Cast
Steel
Gold-containing cast steel
Nodular cast iron
High-quality carbon structural steel
Alloy structural steel||tt| |Material grade
ZG 310-570
ZG A2CrMo
QT450-10
QT 600-3
45.60
35CrMoy|| tt||Biaoya number
GB11352
JB/2Q1297
GB1348
GB69
GB3077
4.2.1 Brake disc shaft The hole and keyway type and size should comply with the requirements of GB3852. 4.2.2 Brake discs manufactured in accordance with Table 3 shall have internal stress eliminated. Cast brake discs should be free of cracks, blisters, pores and other defects. Cast brake discs with ventilation channels should be well cleaned inside the ventilation channels. For forged or steel plate-cut brake discs, defects such as surface cracks and internal interlayers that affect performance are not allowed.
4.2.3 The roundness tolerance of d and d in Table 1 and Table 2 is 1/2 of its diameter tolerance. The total runout of the brake disc friction surface of the center line of the shaft hole is tolerance.
4.2.4 Except for the ventilation duct, which is not machined, the surface roughness Ra of the friction surface is 3.2um, u, and d, and the surface roughness Ra is 1.6um, d and the surface of other parts. The roughness Ra is 6.3 μm. 4.2.5 The processed surface of the brake disc should be treated with anti-rust treatment. 4.2.6 When the cast and forged brake discs made of steel are quenched and tempered, the hardness is 273~302HB. If the friction surface needs to be quenched, the depth of the quenching layer should be 2~3mm and the hardness should be 35~45HRC (the choice of heat treatment method is determined by negotiation between the supplier and the buyer). 4.2.7 The brake disc needs to be statically balanced. The static balance should make the eccentric residual amount of the brake disc on its outer diameter less than the larger of the following two values: 0.005kg:
Matching 0.2% of the mass of accessories such as wheel hubs. b.
Note: If there are special requirements, the supplier and the buyer must negotiate and determine when ordering. 5 Inspection Rules
5.1 out! Inspection
Each brake disc shall be inspected by the quality inspection department of the manufacturer in accordance with the provisions of this standard. Only after passing the inspection can it be shipped to the factory, and a product certificate shall be attached.
5.1.1 Factory inspection items and methods
Use visual inspection methods and general quantities, fixtures and measuring instruments to detect the dimensions with tolerance requirements in the production drawings and Sections 4.2.1~~4.2.5 items in the article.
5.1.2
All inspection items of the brake disc under inspection must be qualified. 5.2 Type inspection
5.2.1 Type inspection shall be carried out when any of the following situations occur: new product finalization or old product transfer to factory for trial production and appraisal; a.
h.||tt| |After official production, the design and process of the brake disc have undergone major changes. When the performance of the product may be affected; when the product has been suspended for more than two years and production resumes; d. When the product is in normal production, type inspection will be carried out every year; 12
JB/T 7019
93
e. When the national quality supervision department puts forward inspection requirements, 5.2.2 Type inspection shall be adopted Sampling method is carried out. During normal production of products, one specification will be selected from each two disc diameters, and at least three specifications will be selected from each series, and at least two samples will be selected from each specification. When conducting type inspection, the number of samples taken is not limited; for type inspection in other cases, one specification should be taken from each disc diameter, and at least two samples of each specification should be taken for inspection
5.2.3. Content
Use visual inspection and general quantities, fixtures and measuring instruments to inspect all dimensions of the production drawings and the inspected products selected in Chapter 4 item-by-item inspection 5.2.4. If there are any unqualified inspection items. Item. It is allowed to double-sample products of the same batch and specifications for re-inspection. All re-inspected products must be qualified. 6 Packaging, transportation and storage | Certificate and instruction manual. 6.2 During transportation and installation, bumping is strictly prohibited and measures should be taken to prevent rain, snow and water invasion to ensure that the product is not damaged and rusted. 6.3 The brake disc is stored in a clean and ventilated place at a temperature of 125 to 10 degrees Celsius. 40℃, where it can be protected from rain, water, etc. It must not be exposed to sunlight for a long time, and no corrosion is allowed. Under the conditions of the regulations, if it does not work properly due to manufacturing quality within 6 months from the date of use (but not more than 18 months from the date of shipment), the manufacturer shall repair or replace it free of charge for the user. Additional instructions:
This standard was proposed and compiled by the Beijing Hoisting and Transport Machinery Research Institute of the Ministry of Machinery Industry. The main drafters of this standard are Tang Feng, Hua Xiaoyang, and Wu Jinggang. 1||tt ||1 The type and size of the shaft hole and keyway of the brake disc should comply with the regulations of GB3852. 4.2.2 Brake discs manufactured in accordance with Table 3 shall have internal stress eliminated. Cast brake discs should be free of cracks, blisters, pores and other defects. Cast brake discs with ventilation channels should be well cleaned inside the ventilation channels. For forged or steel plate-cut brake discs, defects such as surface cracks and internal interlayers that affect performance are not allowed.
4.2.3 The roundness tolerance of d and d in Table 1 and Table 2 is 1/2 of its diameter tolerance. The total runout of the brake disc friction surface of the center line of the shaft hole is tolerance.
4.2.4 Except for the ventilation duct, which is not machined, the surface roughness Ra of the friction surface is 3.2um, u, and d, and the surface roughness Ra is 1.6um, d and the surface of other parts. The roughness Ra is 6.3 μm. 4.2.5 The processed surface of the brake disc should be treated with anti-rust treatment. 4.2.6 When the cast and forged brake discs made of steel are quenched and tempered, the hardness is 273~302HB. If the friction surface needs to be quenched, the depth of the quenching layer should be 2~3mm and the hardness should be 35~45HRC (the choice of heat treatment method is determined by negotiation between the supplier and the buyer). 4.2.7 The brake disc needs to be statically balanced. The static balance should make the eccentric residual amount of the brake disc on its outer diameter less than the larger of the following two values: 0.005kg:
Matching 0.2% of the quality of accessories such as wheel hubs. b.
Note: If there are special requirements, both parties shall negotiate and determine them when ordering. 5 Inspection Rules
5.1 out! Inspection
Each brake disc shall be inspected by the quality inspection department of the manufacturer in accordance with the provisions of this standard. Only after passing the inspection can it be shipped to the factory, and a product certificate shall be attached.
5.1.1 Factory inspection items and methods
Use visual inspection methods and general quantities, fixtures and measuring instruments to detect the dimensions with tolerance requirements in the production drawings and Sections 4.2.1~~4.2.5 items in the article.
5.1.2
All inspection items of the brake disc under inspection must be qualified. 5.2 Type inspection
5.2.1 Type inspection shall be carried out when any of the following situations occur: new product finalization or old product transfer to factory for trial production appraisal; a.
h.||tt| |After official production, the design and process of the brake disc have undergone major changes. When the performance of the product may be affected; when the product has been suspended for more than two years and production resumes; d. When the product is in normal production, type inspection will be carried out every year; 12
JB/T 7019
93
e. When the national quality supervision department puts forward inspection requirements, 5.2.2 Type inspection shall be adopted Sampling method is carried out. During normal production of products, one specification will be selected from each two disc diameters, and at least three specifications will be selected from each series, and at least two samples will be selected from each specification. When conducting type inspection, the number of samples taken is not limited; for type inspection in other cases, one specification should be taken from each disc diameter, and at least two samples of each specification should be taken for inspection
5.2.3. Content
Use visual inspection and general quantities, fixtures and measuring instruments to inspect all dimensions of the production drawings and the inspected products selected in Chapter 4 item-by-item inspection 5.2.4. If there are any unqualified inspection items. Item. It is allowed to double-sample products of the same batch and specifications for re-inspection. All re-inspected products must be qualified. 6 Packaging, transportation and storage | Certificate and instruction manual. 6.2 During transportation, bumping is strictly prohibited and measures should be taken to prevent rain, snow and water invasion to ensure that the product is not damaged and rusted. 6.3 The brake disc is stored in a clean and ventilated place at a temperature of 125 to 10 degrees Fahrenheit. 40℃, where it can be protected from rain, water, etc. It must not be exposed to sunlight for a long time, and no corrosion is allowed. Under the conditions of the regulations, if it does not work properly due to manufacturing quality within 6 months from the date of use (but not more than 18 months from the date of shipment), the manufacturer shall repair or replace it free of charge for the user. Additional instructions:
This standard was proposed and compiled by the Beijing Hoisting and Transport Machinery Research Institute of the Ministry of Machinery Industry. The main drafters of this standard are Tang Feng, Hua Xiaoyang, and Wu Jinggang. 1||tt ||1 The type and size of the shaft hole and keyway of the brake disc should comply with the regulations of GB3852. 4.2.2 Brake discs manufactured in accordance with Table 3 shall have internal stress eliminated. Cast brake discs should be free of cracks, blisters, pores and other defects. Cast brake discs with ventilation channels should be well cleaned inside the ventilation channels. For forged or steel plate-cut brake discs, defects such as surface cracks and internal interlayers that affect performance are not allowed.
4.2.3 The roundness tolerance of d and d in Table 1 and Table 2 is 1/2 of its diameter tolerance. The total runout of the brake disc friction surface of the center line of the shaft hole is tolerance.
4.2.4 Except for the ventilation duct, which is not machined, the surface roughness Ra of the friction surface is 3.2um, u, and d, and the surface roughness Ra is 1.6um, d and other parts of the surface. The roughness Ra is 6.3 μm. 4.2.5 The processed surface of the brake disc should be treated with anti-rust treatment. 4.2.6 When the cast and forged brake discs made of steel are quenched and tempered, the hardness is 273~302HB. If the friction surface needs to be quenched, the depth of the quenching layer should be 2~3mm and the hardness should be 35~45HRC (the choice of heat treatment method is determined by negotiation between the supplier and the buyer). 4.2.7 The brake disc needs to be statically balanced. The static balance should make the eccentric residual amount of the brake disc on its outer diameter less than the larger of the following two values: 0.005kg:
Matching 0.2% of the quality of wheel hubs and other accessories. b.
Note: If there are special requirements, both parties shall negotiate and determine them when ordering. 5 Inspection Rules
5.1 out! Inspection
Each brake disc shall be inspected by the quality inspection department of the manufacturer in accordance with the provisions of this standard. Only after passing the inspection can it be shipped to the factory, and a product certificate shall be attached.
5.1.1 Factory inspection items and methods
Use visual inspection methods and general quantities, fixtures and measuring instruments to detect the dimensions with tolerance requirements in the production drawings and Sections 4.2.1~~4.2.5 items in the article.
5.1.2
All inspection items of the brake disc under inspection must be qualified. 5.2 Type inspection
5.2.1 Type inspection shall be carried out when any of the following situations occur: new product finalization or old product transfer to factory for trial production appraisal; a.
h.||tt| |After official production, the design and process of the brake disc have undergone major changes. When the performance of the product may be affected; when the product has been suspended for more than two years and production resumes; d. When the product is in normal production, type inspection will be carried out every year; 12
JB/T 7019
93
e. When the national quality supervision department puts forward inspection requirements, 5.2.2 Type inspection shall be adopted Sampling method is carried out. During normal production of products, one specification will be selected from each two disc diameters, and at least three specifications will be selected from each series, and at least two samples will be selected from each specification. When conducting type inspection, the number of samples taken is not limited; for type inspection in other cases, one specification should be taken from each disc diameter, and at least two samples of each specification should be taken for inspection
5.2.3. Content
Use visual inspection and general quantities, fixtures and measuring instruments to inspect all dimensions of the production drawings and the inspected products selected in Chapter 4 item-by-item inspection 5.2.4. If there are any unqualified inspection items. Item. It is allowed to double-sample products of the same batch and specifications for re-inspection. All re-inspected products must be qualified. 6 Packaging, transportation and storage | Certificate and instruction manual. 6.2 During transportation and installation, bumping is strictly prohibited and measures should be taken to prevent rain, snow and water invasion to ensure that the product is not damaged and rusted. 6.3 The brake disc is stored in a clean and ventilated place at a temperature of 125 to 10 degrees Celsius. 40℃, where it can be protected from rain, water, etc. It must not be exposed to sunlight for a long time, and no corrosion is allowed. Under the conditions of the regulations, if it does not work properly due to manufacturing quality within 6 months from the date of use (but not more than 18 months from the date of shipment), the manufacturer shall repair or replace it free of charge for the user. Additional instructions:
This standard was proposed and compiled by the Beijing Hoisting and Transport Machinery Research Institute of the Ministry of Machinery Industry. The main drafters of this standard are Tang Feng, Hua Xiaoyang, and Wu Jinggang 1||tt. ||
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