JB/T 2983.2-2001 Crawler bulldozer guide wheel

This standard specifies the structure, main dimensions, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of the crawler bulldozer guide wheel assembly. This standard applies to the guide wheels of crawler bulldozers with track pitches of 203, 216, and 228.6 mm, and also applies to the guide wheels of crawler bulldozers, pipelayers, well-drilling machines, and loaders with the same pitch, and can be used as a technical reference for guide wheels with other pitches. JB/T 2983.2-2001 Crawler Bulldozer Guide Wheel JB/T2983.2-2001 Standard download decompression password: www.bzxz.net

ICS53.100
Machinery Industry Standard of the People's Republic of China
JB/T2983.2—2001
Crawlertractor-dozerTrackidler2001-04-03Promulgated
China Machinery Industry Federation
Implementation on 2001-10-01
JB/T2983.2—2001
This standard is a revision of JB/T3262-1983 "Idler of Crawler Dozer". Compared with JB/T3262-1983, the main technical content of this standard has been changed as follows: - Delete the diagrams and tables of the structure and size of each part; - Incorporate the test method chapter; bzxz.net
- Abolish the percentage sampling inspection and implement GB/T2828-1987 "Batch-by-Batch Inspection Count Sampling Procedure and Sampling Table (Applicable to the Inspection of Continuous Batch)".
This standard will replace JB/T3262-1983 from the date of implementation. This standard is proposed and managed by the Mechanical Industry Engineering Machinery Standardization Technical Committee. The responsible drafting units of this standard are: Tianjin Engineering Machinery Research Institute, Shaanxi Huanggong Group Parts Company, and Hubei Xianning Engineering Machinery Co., Ltd. The participating drafting units of this standard are: Jining Yongsheng Engineering Machinery Parts Factory, Sichuan Xinjin Wenjing Machinery Factory, and Xining Jinhai Engineering Machinery Parts Company.
The main drafters of this standard are: Li Mingxiang, Wang Xiangyou, and Tian Jun. This standard was first issued in June 1983, and this is the first revision. 1 Scope
Machinery Industry Standard of the People's Republic of China
Crawler tractor-dozer-Track idler
Crawler tractor-dozer-Track idlerJB/T2983.2—2001
Replaces JB32@—1983
This standard specifies the structure, main dimensions, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of crawler dozer idler assemblies.
This standard applies to crawler dozer idlers (hereinafter referred to as idlers) with track pitches of 203, 216 and 228.6 mm, and also applies to idlers of crawler dozers, pipelayers, well-draining machines and loaders with the same pitch, and can be used as a technical reference for idlers of other pitches. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard by reference in this standard. When this standard was published, the versions shown were all valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest versions of the following standards: GB/T93—1987
GB/T 1191986
GB/T 230—1991
GB/T2311984
GB/T 1958—1980
GB/T2828—1987
GB 3452.11992
GB/T5617—1985
GB/T 57831986
JB/T2983.1—1998
JB/T2985—2001
JB/T59441991
JB/T6035—1992
JB/T71581993
JB/T8293.1—1999
JB/T8293.2—1999
3Structure and main dimensions
Standard spring washers
Cylindrical pins
Metal Rockwell hardness test method
Metal Brinell hardness test method
Shape and position tolerance inspection regulations|| tt||Batch inspectionCount sampling procedure and sampling table (applicable to inspection of continuous batches)Dimension series and tolerances of O-rings for hydraulic and pneumatic useDetermination of effective hardened layer depth after induction or flame quenching of steelHexagon head bolts with full thread grades A and B
Tracker bulldozer rollers
Metal bushings for construction machinery
General technical conditions for heat-treated parts of construction machineryBench test method for sprocket and roller assemblyDetermination method of cleanliness of construction machinery partsFloating oil seal
Test method for floating oil seal
The structural type of guide wheels with track pitches of 203, 216 and 228.6 mm is shown in Figure 1, the main dimensions are shown in Table 1, and the parts list is shown in Table 2. Marking example:
The guide wheel with track pitch t of 203mm and working surface diameter D of 690mm is marked as:Approved by China Machinery Industry Federation on April 3, 2001 and implemented on October 1, 2001
Track pitch t
JB/T2983.2—2001
Guide wheel 203X690JB/T3262—2001
Figure 1 Guide wheel
Main dimensions of guide wheel
410±0.40
JB/T2983.2—2001
Note: The matching dimensions in brackets are only used in old products734
Guide wheel parts details
Guide wheel shaft
Guide wheel body
Guide wheel plug
Standard part name
Cylindrical pin
Bimetal bushing
115x111.5
（@115×110)
Φ115×117.5
$135×127
（8090）
Φ92.6×103.5||tt| |Bolt M12×358.8 grade
Spring washer 12
Floating oil seal O-ring
Floating seal ring
Standard part name
(82x9)
(95X15)
93.3X14.5
100×15
Use pitch
203,2 16,2286
Table 2 (end)
Use pitch
(80-0.018
Recommended materials
40Mn2 or 50Mm
ZG43SiMh
45 or 35
HT350 (only for 203)
KHT350-10 or|| tt||QT450-0
Steel back copper alloy
Nitrile rubber
Special alloy cast iron
Or powder metallurgy
Recommended materials
115_H8
135_H8
Standard code
JB/T3262
GB/T119||tt| |JB/T2983.1
JB/T2985
GB/T5783
GB/T93
JB/T8293.1
Standard code
O-ring
O-ring
(65×3.1)
（68X3.D)||tt ||(135×3.1)
(115×3.1)
135×3.55
(135×3.1)
M16X15
JB/T2983.2—2001
203,216,2286
Note: The values ​​in brackets in the name column are only for old products. 4 Technical requirements
General requirements
Nitrile rubber
Nitrile rubber
4.1.1 The guide wheel shall be manufactured according to the drawings and technical documents approved by the prescribed procedures, and shall comply with the provisions of this standard GB/T3452.1
JB/T2983.1
4.1.2 The purchased parts of the guide wheel shall comply with the provisions of the relevant national standards or industry standards, meet the requirements of the drawings, and shall have a certificate of conformity. 4.1.3
All parts shall be free of sharp corners and burrs, and the appearance and dimensional accuracy shall be strictly checked before assembly, and they shall be cleaned. 4.1.4 The sealing parts of sealing parts such as floating oil seals shall not be bruised or scratched. 4.1.5 The floating oil seal O-ring and the outer cone of the floating seal ring shall not be stained with oil, and the floating oil seal O-ring shall not be twisted during assembly. During assembly, a small amount of lubricating oil shall be applied to the press-fit mating surface and the bright band of the floating seal ring. 4.1.6
4.1.7 After assembly, fill 80% of the capacity with clean heavy-duty vehicle gear oil according to the oil brand specified in the product manual. No leakage is allowed. Machining quality requirements
Machining quality requirements shall comply with the provisions of Table 3. 4.3
Heat treatment quality requirements
Heat treatment quality requirements shall comply with the provisions of Table 4. 4.4 Appearance and assembly quality requirements
The appearance and assembly quality requirements of the guide wheel shall comply with the requirements of Table 5. Table 3 Machining quality requirements
Part name
Guide wheel body
Guide wheel shaft
Part name
Test items
Inner hole size accuracy
Inner hole surface roughness
Vertical degree of both ends to the inner hole center line
d Outer circle size accuracy
d Outer circle surface roughness
Flange size accuracy
Table 3 (Finish)
Test items
Quality requirements
Inspect as per drawing requirements
Quality requirements
Guide wheel shaft
Bimetallic bushing
Floating oil seal
JB/T2983.2—2001
Surface roughness on both sides of flange
Vertical degree of both sides of flange to d, axis
dInner hole dimension accuracy
dInner hole surface roughness
dOuter circle dimension accuracy
dOuter circle surface roughness
Vertical degree of end face to inner hole d, center line
Inner hole dimension accuracy
dInner hole surface roughness
dOuter circle dimension accuracy
dOuter circle surface roughness
Bright band surface roughness
Bright band plane flatness
Note: In the table, d is the size before press-fitting, and the names and positions of parts are shown in Figure 1. Table 4 Heat treatment quality requirements
Part name
Guide wheel body
Guide wheel shaft
Floating seal ring
Test items||tt ||N, Q surface hardness
N, Q surface hard layer depth
R hard layer depth
Q surface quenching junction soft band width
d surface hardness
4 surface hard layer depth
hard layer depth at fillet
bright band surface hardness
Note: Parts name and location see Figure 1, stone
hard layer depth detection location see Figure 2
Table 5 Appearance and assembly quality
Test items
Axial movement
M12 bolt tightening torque
Oil plug tightening torque
Leakage
Oil cleanliness
Rotation performance
Service life requirements
Inspect according to drawing requirements||tt| |Raalum
As per the drawing requirements (or no leakage in static sealing test)Unit
Quality requirements
Quality requirements
The surface of cast, forged, welded and machined parts shall be smooth, without obvious defects, and the paint shall be even and beautifulmm
The service life of the guide wheel shall not be less than 3000h03-0.8
103-132
157-255
No leakage
Can be turned by hand, but it does not feel tight or loose5
5Test method
5.1 Inspection of machining quality
JB/T2983.2—2001
5.1.1 The dimensional accuracy shall be measured conventionally with an inside diameter dial indicator, an outside diameter micrometer, a depth gauge or a vernier caliper. 5.1.2 The shape and position tolerances shall be measured in accordance with Chapters 4 to 6 of GB/T1958-1980. 5.1.3 The surface roughness shall be measured by visual comparison using a surface roughness meter or a roughness standard sample block. 5.1.4 The flatness of the bright band of the floating oil seal shall be measured using the relevant interference microscope or static oil seal test in JB/T8293.2. 5.2 Inspection of heat treatment quality
5.2.1 The surface hardness of the rate fire shall be measured using a Brinell or Rockwell hardness tester in accordance with Chapters 3 to 6 of GB/T231-1984 and Chapters 5 to 8 of GB/T230-1991, and the arithmetic mean shall be taken. 5.2.2 The depth of the hardened layer shall be measured by Rockwell hardness method according to the provisions of GB/T5617, and the position is shown in Figure 2. 2242
Figure 2 Heat treatment test position
5.2.3 The measurement methods specified in Chapters 4 to 6 of JB/T59441991 shall be used for the measurement of other heat treatment quality. 5.3 Inspection of appearance and assembly quality
5.3.1 Visual inspection of the appearance of the guide wheel shall be used to check the integrity of the assembly parts; check the flatness and cracks, flash, sand adhesion, scratches and other defects of the surface of the casting, forging, welding and machined parts; check the unevenness, peeling, flow marks and other defects of the paint. 5.3.2 Determination of axial movement: Remove the floating oil seal of the assembly, fix the wheel body, and use a dial indicator to measure the movement of the shaft end. 5.3.3 Determination of the tightening torque of bolts and plugs: First fix the wheel body, and then use a torque wrench with a reading meter to measure. 5.3.4 Leakage inspection: Rotate the wheel body, and pass 0.4MPa pressure air into the oil plug hole. Observe that the pressure gauge pointer does not drop within 30s. 5.3.5 Rotation performance measurement: Rotate the wheel body by hand, and you can feel that it is neither loose nor tight. 5.3.6 Oil cleanliness shall be measured according to the provisions of JB/T7158. 5.4 Service life assessment
Assessment shall be carried out according to the 500h bench test method in JB/T6035, or according to the written certificate of 3 users with time statistics and failure records. The bench test report data or user's written certificate is valid for 4 years. 6 Inspection rules
6.1 Factory inspection
Each guide wheel shall be inspected and qualified by the quality inspection department of the manufacturer before it is allowed to leave the factory. The factory inspection items include the appearance of the assembly, the integrity of the assembly, the rotation performance of the wheel body, the sealing performance and leakage of the lubricating oil, the tightening torque of the bolts and oil plugs, etc. The inspections of machining quality, bright band hardness, axial movement and oil cleanliness are carried out during the production process. 6.2 Type test
6.2.1 Classification of non-conformities
JB/T2983.2—2001
Any inspected item that does not meet the requirements of Chapter 4 is called a non-conformity. Non-conformities are divided into Class A, Class B and Class C. See Table 6 for non-conformities
Non-conformity categories
(Fatal)
(Serious)
(General)
Item number
Classification of non-conformity items of guide wheel quality
Content of non-conformity
The assembly has visible wheel body cracks or oil leakage before use 2
Qualified quality level AOL value
The hardness or rate of the wheel body working surface The depth of the hard layer does not meet the requirements The size accuracy or surface quality of the inner hole of the guide wheel body The roughness does not meet the requirements. The outer diameter dimension accuracy or surface roughness of the iron sleeve does not meet the requirements. The bench test life does not meet the requirements.
The outer diameter hardness or hardened layer depth of the guide wheel shaft d does not meet the requirements. The outer diameter dimension accuracy or surface roughness of the guide wheel shaft d does not meet the requirements. The inner hole dimension accuracy or surface roughness of the bimetallic sleeve does not meet the requirements. The outer diameter dimension accuracy or surface roughness of the bimetallic sleeve does not meet the requirements. The inner diameter dimension accuracy or surface roughness of the iron sleeve does not meet the requirements. The depth of the hardened layer at the fillet of the guide wheel body rim does not meet the requirements. The bright band hardness or surface roughness of the floating seal ring does not meet the requirements. The cleanliness of the lubricating oil does not meet the requirements or there is micro-seepage in the form of drops. The material properties of the main parts (wheel body, shaft, bushing, iron sleeve, floating seal) do not meet the requirements. The axial dynamic force does not meet the requirements.
The verticality of both sides of the shaft flange to the center line does not meet the requirements. The thickness, dimensional accuracy or surface roughness of the shaft flange does not meet the requirements. The tightening torque of the M12 bolt does not meet the requirements.
The tightening torque of the screw plug does not meet the requirements.
The depth of the hardened layer at the fillet of the shaft does not meet the requirements.
The feel of the wheel body when rotating does not meet the requirements.
The soft belt size at the quenching connection of the wheel body does not meet the requirements. The verticality of the inner hole centerline of the side does not meet the requirements. The verticality of the inner hole centerline of the sleeve end face does not meet the requirements. The appearance quality does not meet the requirements.
There are slight defects in cast, forged and welded parts
Non-main material performance does not meet the requirements
Non-main dimensional accuracy or surface roughness does not meet the requirements. The assembly has slight oil leakage but does not form drops
The qualified quality level AQL value of the guide pulley is shown in Table 7. The AQL value in the table is the acceptable quality level per hundred units of products, where Ac represents the qualified judgment number of samples and Re represents the unqualified judgment number of samples. The number of items can be used as the minimum judgment unit during inspection. 7
6.2.3 Sampling plan
JB/T2983.2—2001
6.2.3.1 Sampling inspection is in accordance with the provisions of GB/T2828. The sampling plan type selects a normal sampling plan. 6.2.3.2 Inspection level selects general inspection level I. 6.2.3.3 Inspection batch N is usually 16~25 (pieces), but when the user is sampling, N is not limited. Random sampling. 6.2.3.4 Sample size code is C, and the randomly selected sample size n-5 (pieces) should be inspected according to the items listed in Table 6, and at least one piece should be partially cut to measure the hardened layer depth and metallographic structure. The partial cutting test results of this piece represent the results of 5 pieces. 6.2.3.5 Sampling scheme See Table 7.
Table 7 Sampling scheme
Classification of non-conforming items
6.2.4 Evaluation of sampling inspection
Inspect the samples according to the sampling scheme specified in this standard and fill in the results in the summary table (see Table 8). When the number of non-conforming items per hundred items in the sample is less than or equal to Ac, it is judged as qualified; when it is greater than or equal to Re, it is judged as unqualified. When all categories are judged as qualified, the product is finally evaluated as qualified, otherwise it is unqualified, but it is allowed to replace the missing Class B non-conforming items with the excess Class C non-conforming items.
Table 8 Summary of Inspection Results
Class A Non-conformity
Sampling Plan
Marking, Packaging, Transportation and Storage
7.1 Marking
Class B Non-conformity
AQL=65
Sampling Plan
The guide wheel shall at least include the following textual contents when leaving the factory: a) Manufacturer's name;
b) Guide wheel model and quantity;
c) Guide wheel standard name and code:
d) Manufacturing date or delivery date:
e) Inspection certificate.
7.2 Packaging and Transportation
Class C Non-conformity
AQL=150
Sampling Plan
7.2.1 The packaging of the assembly can be carried out according to the user's requirements. It should be wrapped with a strong rope, and the exposed part should be coated with grease (butter) to prevent rust8
JB/T2983.2—2001
You can also use strong felt or wood to package the two ends of the assembly, and fix them with wire or bolts to prevent bumps and damage during transportation. 7.2.2 The following should be indicated on the package:
a) Name, address and postal code of the receiving unit: b) Name, specification, quantity and weight of the assembly or parts; e) Shipping date:
d) Name, address, postal code and telephone number of the manufacturer. Storage
Idler wheels and finished parts should be placed in a ventilated, dry, non-corrosive warehouse and should be guaranteed to be free of rust within 1 year9
Mechanical Industry Standard
Idler wheels for crawler bulldozers
JB/T2983.22001
Published by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2, Shouti South Road, Beijing
: Postal Code 10004 4)
01/16 Printing sheet 3/4 Word count 20000
Format 880×1230
First edition in August 2001
First printing in August 2001
Print run 1-500
Price 1200 yuan
2001-010
Mechanical Industry Standard Service Network: http/AvwwJB.ac.cn086
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