title>JB/T 5253.1-1991 Special wrench for technical conditions of random special tools for steam turbines - JB/T 5253.1-1991 - Chinese standardNet - bzxz.net
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JB/T 5253.1-1991 Special wrench for technical conditions of random special tools for steam turbines
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Standard ID:
JB/T 5253.1-1991
Standard Name: Special wrench for technical conditions of random special tools for steam turbines
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
Some standard content:
K54 JB People's Republic of China Pressurized Machinery Industry Standard JB/T5253.11991 疯 1991-07-014 e 14 1992-07-01面 G2 0P xpEe/wwW.bzxz.Net 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) 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 A ED JB/T 5253.11991 goa degree by g 2A ★ 880A1230 19XXA XX 1 1/16 X& XXX stew X/X fish 100044 XXX,XXX xx應 19XXA1 XXX.XX0 XXXXX X http://JB.ac.cn 1661 ~' L/ar 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.