This standard specifies the performance indicators, metallographic structure, appearance quality, test methods, inspection rules, marking and packaging of loader bucket teeth. This standard applies to cast bucket teeth of various types and specifications of loaders. JB/T 5959-1991 Loader Bucket Teeth Technical Conditions JB/T5959-1991 Standard download and decompression password: www.bzxz.net

P97
JB
Machinery Industry Standard of the People's Republic of China
JB/T595991
Technical conditions for loader bucket teeth
Released on 1991-12-12| tt||Published by the Ministry of Mechanical and Electronics Industry of the People's Republic of China
Implemented on 1992-07-01
Mechanical Industry Standards of the People's Republic of China
Technical Conditions for Loader Bucket Teeth
1 Main comfort and scope of application
JB/T5959-91
This standard specifies the performance indicators, metallographic structure, appearance quality, test methods, inspection rules, marking and packaging of loader bucket teeth etc., this standard is applicable to cast bucket teeth of various types and specifications of loaders. 2 Reference standards
Metal Tensile Test Method
GB228
GB230
GB231
GB229
Metal Rockwell Hardness Test Method||tt ||Metal Brinell Test Method
Metal Charpy (U-notch) Impact Test Method GB2828 Batch-by-Batch Inspection and Count Sampling Procedure and Sampling Table (Applicable to Inspection of Continuous Batch) 3 Technical Requirements||tt| |3.1 Structural form
The bucket tooth structure can be divided into two types: integral type and combined type, as shown in Figures 1 and 2. picture! Integral bucket tooth structure diagram
Ministry of Mechanical and Electronic Industry approved on 1991-12-12 for implementation on 1992-07-01
1
3.2 technical specifications
JB/T5959— 91
Combined bucket structure form
b Combined bucket tooth structure form 2
Figure 2 Combined bucket tooth structure diagram
Bucket teeth should be in accordance with the prescribed procedures Manufactured according to difficult drawings, but the technical conditions must comply with the provisions of this standard. 3.3 Bucket tooth classification
According to the different working conditions of the loader, the tooth tips of the combined bucket teeth and the integral bucket teeth are divided into three types: 1, 2, and 3. Their characteristics and application range are shown in Table 1. | |tt | |2
Special
Point
Moderate hardness and impact toughness
High hardness, moderate impact toughness
High hardness, high impact toughness||tt| |Application
Fantasy diagram
General working conditions
Used for photographic working conditions where the impact is not severe. Used for working conditions where wear and impact are serious 3.4.1 The bucket tooth size limit deviation should comply with the requirements in Table 2. The size of the assembly surface shall adopt the level A deviation value, and the size of the non-assembly surface shall adopt the level B deviation value. Table 2
Maximum bucket tooth size
6120
>120~250
>250~500
>500~1250
3.4 .2
2
A
50
±0.5
±0.5
±0.8
±1. 0
±2. 0
±3. 0
±3. 0
4.0
>50~120
B|| tt||±0. 5
±0.8
±1.0
±1.
±3. 0
t3.0||tt| |4.0
Basic ruler ten
>120~250
Limited
±1. 0
±1.3
±1|| tt||The draft angle of the bucket, based on the parting surface, should comply with the requirements in Table 3. Bias
Difference
±4-0
±5. 0
±5.0
>250~500
A||tt ||±1. 5
±1.8
8
±6.0
±6.0
mm
>500~800|| tt||±2.0
7.0
Height of measuring surface
mm
Draft angle
3.5 Chemical composition
≤20
1*30~3*00
JB/T5959-91
Table 3
>20~50
1°30'~2* 30
>50~100
100~1*30
>100~200
0°45'~1*00
Integral bucket The chemical composition of the tooth tips, tooth seats and tooth pins of the teeth and combined teeth can be selected by the manufacturer, but the metallographic structure, impact value, hardness and other mechanical performance indicators must comply with the provisions of this standard, 3.6 Metallographic structure ||tt ||The metallographic structure of bucket teeth, tooth pins and retaining rings should comply with the requirements in Table 4. Table 4
species
category
whole tooth, tooth tip
teeth
teeth
gear
seat|| tt||pin
circle
3.7 mechanical properties
2
3
gold
phase
tt | Wristite
Painted murite
3.7.1 The mechanical properties of bucket teeth, tooth pins and retaining rings should comply with the requirements in Table 5. Table 5 | | tt | |tt||Dream
Tooth
Block
Class
1
2
3
Block||tt ||Sales
Wheat noodles hard environment
HRC
44~48
HRC
46~52
HRC||tt| |46~52
HRC
40~48
HB
320~380
HRC
34~39||tt| |Service strength.
Nnna
800
B00
Resistance control strength.
N/mm
1100
>1200
1200
>1200
≥1000
≥1000|| tt||The string is stretched,
%
≥9
>8
Section collection rate
%
≥45| |tt||>30
3.7.2 The difference between the core hardness and surface hardness of the integral bucket tooth and the combined bucket tooth tip shall not exceed 6HRC. 3.84 Tooth surface quality
3.8.1 The bucket tooth surface should be smooth and smooth, and no cracks are allowed. Impact closure a
J/em*
20
20
>35
≥40
60
3.8.2 Defects on the bucket tooth surface are allowed to be repaired if they do not exceed the requirements in Table 6. The repairs should be carried out before heat treatment. After repairs, they should comply with the requirements of this 3
standard.
Types of defects
Trachoma
Gas
hole
hole
wax
hole
knot| |tt||Scar
Size
43
3
5
Lingge, CepibZxz.net
Decoration
depth
degree
≤1/7
where
wall
thickness
out≤1.5.
I have deep holes
21/7
wall
face
number
JB/T595991||tt| |Table 6
Missing
Sound distance
Within 450 circles
Not more than 3
Within 0
Not More than 1
Not more than 1 within 400 four

220
trap
love
size||tt| |Condition
>43~6
>46~10
≤5
>15~430
Filipino outfit
Package| |tt||depth
surface
number
$50 circle
5 more
61/3
all|| tt||in
whole
occupies ≤1.5.
remaining hole depth
21 locations
wall thickness
after trimming Finally, the wall thickness should be within the dimensional deviation range. 3.8.3 After the bucket teeth pass the inspection, the surface should be coated with anti-rust paint. 4 Test methods
4.1 Tensile test
Within the 450 limit | |tt||No more than 3
Within 50 circles
Multiple deep
Within ±100 circles
No more than 3
In 00medic
C has many hands! | |tt | 20| The diameter can be 45mm and the gauge length is 25mm. 4.1.3 The tensile test method shall be carried out in accordance with the provisions of GB228, and the test results shall comply with the provisions of Table 5. 4.2 Impact test
4.2.1 The roughness of the specimen used for the impact test shall comply with the requirements in Figure 3. Full
300
T
RE
Figure 3 rough damage diagram of the mechanical properties sample
4.2.2 When cutting the test piece from the bucket tooth body When sampling, it should be cut from the tip of the bucket tooth or the tail of the gear seat more than 5mm below the skin. 4.2.3 The size of the impact sample shall comply with the provisions of GB229. 4.2.4 The impact test method shall be carried out in accordance with the provisions of GB229. The test results shall comply with the provisions of Table 5. 4.3 Hardness test
4.3.1 The surface hardness test can be carried out using the hardness test block heat-treated in the furnace. The hardness test block can be cut from the specimen roughness shown in Figure 3, 4
JB/ T5959—-91
The decarburization layer should be removed before the test; if it is required to be carried out on the bucket tooth body, 1~2mm of the skin must be removed before the test. 4.3.2 The core hardness test shall be carried out on slices taken from the longitudinally symmetrical chamfered surface of the tooth tip body. 4.3.3 The hardness test method shall be carried out in accordance with the provisions of GB230 and GB231, and the test results shall comply with the provisions of Table 5. 5 Inspection Rules
5.1 Surface Quality Inspection
The surface quality of bucket teeth shall be inspected visually and with measuring tools. 5.2 Dimensional inspection
The dimensional accuracy of bucket teeth is inspected with a universal measuring tool with an accuracy of 0.05mm. 5.3 Factory inspection
Before leaving the factory, the bucket teeth shall be inspected by the quality inspection department of the manufacturer according to the drawings and the provisions of this standard. Factory inspection items include: Dimensional accuracy: Sampling inspection according to the general inspection level 1 stipulated in GB2828, and the qualified quality level AQL value is not greater than 4.0: a.
Chemical composition: Inspected furnace by furnace: b.||tt| |C | Recheck; d. Surface quality: inspected piece by piece.
5.4 Type test
Type test is a comprehensive inspection of the bucket teeth according to all the items specified in the technical requirements of this standard. When one of the following conditions occurs, a type test should be carried out; three pieces at a time, test The results should comply with the provisions of this standard. When the bucket teeth are trial-produced and the first batch of production is produced; a.
b.
c.
d.
When the raw materials are in production Or when there is a change in the process: when the raw materials and process are stable and the surface has been in continuous production for half a year: when production is resumed after three months of suspension, 6 mark and packaging
6.1 mark
6.1.1 The bucket tooth's trademark should be cast on the bucket teeth. 6.1.2 Bucket teeth that pass the inspection should be shipped from the factory with a certificate of conformity. 6.2 Packaging
6.2.1 Integral bucket teeth, tooth tips, and tooth seats should be packed in wooden boxes. The packaging should be firm and strong, and filled with fillers to prevent loosening. 6.2.2 The tooth pin and retaining circle are packed in cartons or wooden boxes, with fillers added to avoid loosening. 6.2.3 There should be a certificate of conformity and a packing list inside the packaging box. 6.2.4 The receiving place, unit name, product name, quantity, weight and shipping place, unit, name, etc. should be marked on the outer skin of the packaging box. 6.2.5 After negotiation between the supply and demand parties, bucket teeth can also be packaged in other ways. Additional instructions:
This standard is proposed and managed by the Tianjin Engineering Machinery Research Institute of the Ministry of Mechanical and Electronic Industry. This standard is drafted by Tianjin Engineering Machinery Research Institute. The main drafters of this standard are Wang Yiqing and Chen Erqiang. 5
| |tt | And re-inspect according to these regulations; d. Surface quality: inspected piece by piece.
5.4 Type test
Type test is a comprehensive inspection of the bucket teeth according to all the items specified in the technical requirements of this standard. When one of the following conditions occurs, a type test should be carried out; three pieces at a time, test The results should comply with the provisions of this standard. When the bucket teeth are trial-produced and the first batch of production is produced; a.
b.
c.
d.
When the raw materials are in production Or when there is a change in the process: when the raw materials and process are stable and the surface has been in continuous production for half a year: when production is resumed after three months of suspension, 6 mark and packaging
6.1 mark
6.1.1 The bucket tooth's trademark should be cast on the bucket teeth. 6.1.2 Bucket teeth that pass the inspection should be shipped from the factory with a certificate of conformity. 6.2 Packaging
6.2.1 Integral bucket teeth, tooth tips, and tooth seats should be packed in wooden boxes. The packaging should be firm and strong, and filled with fillers to prevent loosening. 6.2.2 The tooth pin and retaining circle are packed in cartons or wooden boxes, with fillers added to avoid loosening. 6.2.3 There should be a certificate of conformity and a packing list inside the packaging box. 6.2.4 The receiving place, unit name, product name, quantity, weight and shipping place, unit, name, etc. should be marked on the outer skin of the packaging box. 6.2.5 After negotiation between the supply and demand parties, bucket teeth can also be packaged in other ways. Additional instructions:
This standard is proposed and managed by the Tianjin Engineering Machinery Research Institute of the Ministry of Mechanical and Electronic Industry. This standard is drafted by Tianjin Engineering Machinery Research Institute. The main drafters of this standard are Wang Yiqing and Chen Erqiang. 5
| |tt | And re-inspect according to these regulations; d. Surface quality: inspected piece by piece.
5.4 Type test
Type test is a comprehensive inspection of the bucket teeth according to all the items specified in the technical requirements of this standard. When one of the following conditions occurs, a type test should be carried out; three pieces at a time, test The results should comply with the provisions of this standard. When the bucket teeth are trial-produced and the first batch of production is produced; a.
b.
c.
d.
When the raw materials are in production Or when there is a change in the process: when the raw materials and process are stable and the surface has been in continuous production for half a year: when production is resumed after three months of suspension, 6 mark and packaging
6.1 mark
6.1.1 The bucket tooth's trademark should be cast on the bucket teeth. 6.1.2 Bucket teeth that pass the inspection should be shipped from the factory with a certificate of conformity. 6.2 Packaging
6.2.1 Integral bucket teeth, tooth tips, and tooth seats should be packed in wooden boxes. The packaging should be firm and strong, and filled with fillers to prevent loosening. 6.2.2 The tooth pin and retaining circle are packed in cartons or wooden boxes, with fillers added to avoid loosening. 6.2.3 There should be a certificate of conformity and a packing list inside the packaging box. 6.2.4 The receiving location, unit name, product name, quantity, weight and shipping location, unit, name, etc. should be indicated on the outer skin of the packaging box. 6.2.5 After negotiation between the supply and demand parties, bucket teeth can also be packaged in other ways. Additional instructions:
This standard is proposed and managed by the Tianjin Engineering Machinery Research Institute of the Ministry of Mechanical and Electronic Industry. This standard is drafted by Tianjin Engineering Machinery Research Institute. The main drafters of this standard are Wang Yiqing and Chen Erqiang. 5
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