This standard specifies the shape and size, technical requirements, test methods, etc. of blade bolts. This standard is applicable to bulldozers, scrapers and graders (other engineering machinery equipped with bucket teeth can be used as a reference). JB/T 2648.3-1995 Bulldozer, scraper and grader blade bolts JB/T2648.3-1995 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T2648.3
Mi Pengke
1995-06-20
1996-01-01
JB/T2648.31995
This mechanical industry standard for blade bolts for bulldozers, scrapers and graders includes the following parts: Part 1 (i.e. JB/T2648.1): Main shapes and basic dimensions of blades: Part 2 (i.e. JB/2648.2): Technical requirements for blades: Part 3 (i.e. JI3/2648.3): Bolts for blades Part 1 of the standard is formulated based on the international standard ISO71291989 "Upper machinery - Pushers, transporters and graders - Blades: Main shapes and basic dimensions" drafted by the International Organization for Standardization IS0/TC127 Earthmoving Machinery Technical Committee. The technical content is equivalent to the international standard. Part 3 of the standard, the shape and dimensions of screw rods for blades, is based on the international standard ISO71291989 "Upper machinery - Pushers, transporters and graders - Blades: Main shapes and basic dimensions" drafted by the International Organization for Standardization IS0/TC127 Earthmoving Machinery Technical Committee. The technical content is equivalent to the international standard. Appendix A in Part 3 is the standard appendix. This standard shall be implemented from January 1, 1996, and replace JB2648-81. This standard was proposed and coordinated by Tianjin Engineering Machinery Research Institute of the Ministry of Machinery Industry. Part 1 and Part 2 of this standard were drafted by Tianjin Engineering Machinery Research Institute of the Ministry of Machinery Industry; Part 3 of this standard was jointly drafted by Tianjin Engineering Machinery Research Institute of the Ministry of Machinery Industry and Shenyang Screw Factory. The main drafters of this standard are Wu Runcai, Yang Yuyi, I
1 Scope
Registered
TerrestrialWww.bzxZ.net
This standard specifies the shape and size, technical requirements, test methods, etc. of screws for blades. JB/T2648.31995
This standard is applicable to bulldozers, shovelers and earthmovers (other machines installed on bucket teeth can be used as a reference). 2 Referenced standards
The following standards contain the following provisions: The provisions of this standard are constituted by reference in this standard: At the time of publication of this standard: The versions shown in the following standards are valid. All standards will be revised, and all parties to this standard should explore the possibility of using the latest versions of the following standards. GB 9G—85
GB193—81
GB 197—81
CB/T 1229 91
GB/T1230--91
GB/T 1231 91
GB 3098. 1—82(88)
GB 5779. 1-86
3 Shape and size
Fastener acceptance inspection, marking and packaging
Ordinary thread diameter and pitch series (diameter 1~-600 mm) Ordinary thread tolerance and matching (diameter 1~355 mm) High-strength hexagon nuts for steel structures
Sealing structure high-strength washers
High-strength hexagonal head bolts, large hexagonal nuts, washers for steel structures Technical parts Mechanical properties of bolts, screws and screws Fasteners Installation defects
Bolts, screws and screws
3.1 The shape and size of the screw shall comply with the requirements of the drawings and drawings, 5*+22
1995-06-20
1996-01-01 Small cable
Specifications
Nominal size
Coarse pitch ordinary thread, diameter 16mm, length L of 90mm blade butterfly bolt: M16X90 JI3/T 2648.3 --95
4 Technical requirements
The mechanical properties and hardness of the bolts shall comply with the specifications in Table 2. 4.1
Tensile strength
National service strength change
The tightening torque of the bolts shall comply with the specifications in Table 3 mm
Tightening, torque N·㎡
108~147
226~-294
Impact toughness
≥59(M24 and above 68
392~501
637-~852
34-~40HRC
392-~1[47
1598-~2156
4.3The thread is in accordance with the coarse pitch ordinary thread of GB193, and the thread tolerance zone is in accordance with 6g of GB197. The root shape of the external thread is in accordance with Chapter 3 of GB197.
4.4The diameter of the bolt rod can be manufactured according to the thread major diameter and major diameter tolerance, or according to the middle diameter tolerance required by the user.4. 5Surface defects are in accordance with GB 5779. 1 4.6 The decarburized layer shall be in accordance with the provisions of Grade 12.9 in Table 8 of GB3098.1. 4.7 The screw grid shall not have burrs, scales and other defects that may affect actual use. The bending of the bolt shall be within the bending amount, and the calculation formula is as follows 4.8
The surface of the bolt shall be oxidized.
5 Test method
5.1 The tensile test of the actual bolt shall be carried out in accordance with the provisions of 8.2 of GB3098.1, and the tensile load shall be in accordance with the provisions of 2
Tensile load kN
JB/T2648.3
5.2 The tensile test of the machined test piece shall be carried out in accordance with the provisions of 8.1 of GB3098.1. 24
5.3 The guaranteed load test of bolts shall be carried out in accordance with the guaranteed load of grade 10.9 in Table 7 of GB3098.1 and the test method in 8.4. 5.4 The hardness test shall be carried out in accordance with the provisions of 8.3 in GB3098.1. 5.5 The impact test shall be carried out in accordance with the provisions of 8.6 in GB3058.1. Acceptance inspection, marking and packaging
The acceptance inspection, marking and packaging of bolts shall be in accordance with the provisions of FI90. 3
A1 Nuts
JB/T2648.3
Appendix A
Nuts and washers
(Standard Appendix>
A1.1 The dimensions of the nut matching the blade bolt shall be in accordance with the provisions of GB1229. A1.2 The thread shall be the coarse ring ordinary thread specified in GB193, and the thread tolerance zone shall be 6H specified in CB197. A1. 3 The mechanical energy and hardness of the thread after tempering shall comply with the provisions of Table A1. Table A1
Tensile strength
A1, 4 The surface of the nut shall be hydrogenated.
Service strength 2
20---361RC
A1.5 The guaranteed load test, hardness test, inspection rules, marking and packaging of the nut shall comply with the provisions of 10H grade in GB/T1231, A2
A2, 1 The shape and size of the washer shall comply with the provisions of (B/T1230. A2.2 Economical tempering of washers The hardness requirements and determination of the same fire shop, the inspection rules, marking and packaging of washers are in accordance with the current provisions of G13/T1231. A2.3 The surface of the washer should be galvanized and then tempered at 200℃×6. 4
100044
lying880b1230
for section 3/4
square 10,000
1996nest1 cabin wheel Dai Su
1996table1 antelope
for square 1
芃鱻极匙贴
脑10.00翼
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.