JB/T 5253.1-1991 Special wrench for technical conditions of random special tools for steam turbine JB/T5253.1-1991 Standard download and decompression password: www.bzxz.net

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People's Republic of China Pressurized Machinery Industry Standard JB/T5253.11991
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1991-07-014
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14
1992-07-01面
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1 Subject content and scope of application
This standard specifies the basic types and technical requirements of special wrenches for steam turbines. This standard applies to the design, manufacture and acceptance of special wrenches for steam turbines. Reference standards
2
GB230
JB2901
JB2862
Structural form
3
Metal Rockwell hardness test Method
Technical conditions for rust prevention of steam turbine
Technical conditions for steam turbine packaging
Single-head hexagonal wrench (Figure 1a, b)
3.1
Printing place
(a)
15°
Printing place
(b)
Figure 1
1991-07-01 Mouse
JB/T5253.11991||tt| |1992-07-01
3.2 Single-head plum wrench (Figure 2)
3.3 Single-head square wrench (Figure 3)
3.4 ??Single-head flat wrench (Figure 4)
3.5 Single-head hexagon wrench (Figure 5)
2
JB/T5253.11991
Printing
Figure 2
Printing
Figure 3
Printing
Figure 4
Printing
National 5
3.6 Hexagonal and twelve-square crank wrenches (Figure 6a, b) 3.7 Crank wrench (Figure 7)
3.8 Hook wrench (Figure 8)wwW.bzxz.Net
JB/T5253.11991
(a)
Printing
(b)
Figure 6
Printing
Figure?
Printing
Figure
3.9
Vertical round nut wrench (Figure 9)
Double-pin wrench (Figure 10)
3.10
3. 11
Socket wrench (Figure 11)
JB/T5253.11991
Printing
A direction
Figure
9
Printing
Figure
10
B direction
3.12 Claw wrench (Figure 12)
4 Technical requirements
JB/T5253.11991
Printing
Figure 11
Printing
Figure 12
4.1 When designing a wrench, sufficient strength should be considered and it should be ensured that deformation or breakage will not occur under the condition of increasing external force (using an extension sleeve).
4.2 The material should be 45 steel or tool steel forgings, and should be quenched and tempered. 4.3 After forging, the wrench should be subjected to stress relief annealing. 4.4 The working part of the wrench should be subjected to surface rate annealing, and the hardness value should be HRC36~48. 4.5 After heat treatment, the wrench should be sandblasted, and the surface should be blued or galvanized. 5 Inspection and testing
5.1 The wrench should not be overburned, overheated, folded or cracked. 5.2 The machined surface should be smooth, free of burrs, black skin, scratches, cracks, etc. The surface roughness and the tolerance of the opening (hole, shaft) should meet the requirements of the drawing.
5.3 The hardness test of the quenching part of the wrench shall be carried out in accordance with the relevant provisions of GB230, and the sampling ratio shall be 10%, but not less than two pieces. 6 Marking, rust prevention, packaging
The wrench should be marked with specifications, and the mark should be clear. 6.1
6.2 The wrench shall be treated with rust prevention in accordance with the relevant provisions of JB2901. Under normal storage conditions, the rust prevention period is one year. 6.3 The wrench should be fixed in a special tool box or other packaging box according to the relevant provisions of JB2862. 6
JB/T5253.11991
Additional Notes:
This standard is proposed and managed by the Shanghai Power Generation Equipment Complete Design Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by Harbin Steam Turbine Plant and Shanghai Power Generation Equipment Complete Design Institute. The main drafters of this standard are Li Yunpeng, Zhang Fuyan, Ren Qihua and Fang Chonghua. E
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