GB/T 11352-2009 "casting carbon steel for general engineering";
GB/T 9440-2010 "malleable cast iron";
GB/T3098.1-2000 "mechanical performance bolts, screws and studs for fasteners";
Gb15831-2006 steel pipe scaffold fastener
TB/T 2292-1991 "WDJ bowl button multi-functional scaffold"
GB/ t249-2010 "test method for mechanical properties of steel tubular scaffold structure"
GB/ t3098.2-2000 "coarse thread of fastener mechanical performance nut"
GB/T 16491 "electronic universal testing machine"
GB/ t16825-1997 test of tensile testing machine
Test parameters | Fasteners in the form of | Parameter requirements |
GB15831-2006 "test method for mechanical properties of steel pipe scaffolding" | ||
Sliding resistance test | Right-angle fastener | When P=7KN, it is less than or equal to 7.When P=10KN, it is less than 0.5. |
Rotary buckle | When P=7KN, it is less than or equal to 7.When P=10KN, it is less than 0.5. | |
Resistance test | Right-angle fastener | When P=25KN, the parts should not be damaged. |
Rotary buckle | When P=17KN, the parts should not be damaged. | |
Torsional stiffness test | Right-angle fastener | The torque is 900N •m, and f is less than or equal to 70. |
Tensile test | Docking fastener | P = 4 kn, Δ ㎜ 2 or less |
Compression test | The base fasteners | When P=50KN, the parts should not be damaged. |
GB/ t249-2010 "test method for mechanical properties of steel tubular scaffold structure" | ||
Upper bowl button | Bowl tensile | The test force P is completely unloaded from 0KN to 15KN, and then from 0KN to 30KN. This charge is kept for 2min, and the parts are not damaged. |
Lower bowl strength | The bonding strength of the bowl. | The test force P is completely unloaded from 0KN to 30KN, and then from 0KN to 60KN. This charge is kept for 2min, and the parts are not damaged. |
The strength of the crossbar joint. | The strength of the bowl. | The test force P is completely unloaded from 0KN to 25KN, and then from 0KN to 50KN. This charge is kept for 2min, and the parts are not damaged. |
Welding strength of horizontal bar joint. | The strength of the splice bar joint. | The test force P was completely unloaded from 0KN to 10KN, then 0KN added to 25KN, which was maintained for 2min, and the parts were not damaged. |
Adjustable support pressure. | The bowl button can adjust the compressive strength. | The test force P is completely unloaded from 0KN to 50KN, and then from 0KN to 100KN. This charge is kept for 2min, and the parts are not damaged. |
1. Style: microcomputer control, double column.
2. Maximum test force: 150KN.
3. Measurement range: 1%-100%.
4. Resolution: 1/30,000.
5. Displacement measurement: using electronic micrometer (company's proprietary technology), other displacements are collected by high-precision photoelectric encoder.
6. Indicators of deformation measurement device: the measurement range is 1% to 100%.
7. Accuracy of deformation measurement: over 0.5% of the indicated value.
8. Accuracy of displacement measurement: superior to + or + 0.5% of the indicated value.
9. Displacement measurement resolution: 0.001mm.
10. Speed range: 0.01mm/min-500mm/min.
11. Accuracy of velocity measurement: over 0.5% of the indicated value.
12. Stretch stroke: 700mm.
13. Compression stroke: 700mm.
14. Test space width: 400mm.
15. Test machine accuracy rating: superior to grade 1.
16. Computer software of test measurement and control system based on Windows operating system.
17. Force control rate adjustment range: 0.005-5%FS/s.
18. Accuracy of force control rate control: within the set value of + or + 1.
19. Accuracy of displacement rate control: when the rate is < 0.01mm/min, it is less than 1%;The rate of > 0.05mm/mi is within the set value of plus or minus 0.5%.
20. Constant force, constant displacement and constant deformation control range: 0.5%-100%Fs.
21. Constant force, constant displacement and constant deformation control accuracy: when the set value is greater than 10% of Fs, it is less than 0.1% of the set value;speed
The rate < 10%Fs is less than 1% of the set value.
22. Working environment: room temperature 10 ~ 35, humidity 20% ~ 80%.
23. Power supply: 0.75kw, AC220V plus or minus 10%, 50Hz, single phase.
24. Test machine weight: about 800kg.
25, working environment: 20 ℃ - 45 ℃, humidity: 20% to 80%
26. Test machine size: about 760*540*1950mm.
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