Complete set of mechanical testing equipment for new standard of steel structure

According to GB/T1231-2024 and GB50205-2020, Jinan Liling supplied complete sets of new standard high-strength bolt detector, anti-slip coefficient detector, sliding plate electric torque machine, torsion-shear electric wrench, complete bolt tooling and 200-ton electro-hydraulic servo universal testing machine, with clear division of labor and accurate matching, covering all mechanical testing items of M12-M36 high-strength bolts.

1. The new standard high-strength bolt detector: the main engine independently detects the hexagon, and the torsional shear bolt of torsional shear bolt needs to be matched with the torsional shear type electric wrench for testing. When testing M16-M30 torsional shear bolt, the main engine is used as the core of axial force torque acquisition, and the torsional shear type electric wrench is used as a special tightening tool. After the torsion shear bolt is clamped in place, the electric wrench is used to twist it until the tail plum blossom head is cut. The instrument synchronously records the instantaneous torque of fracture and the stable pretension in the whole process, and accurately verifies the fastening performance of the torsion shear connection pair. The data meets the acceptance requirements of GB/T3632 standard.

The main body of the equipment completely meets the requirements of GB/T1231-2024 for testing hexagonal bolts, and M12-M36 full-size hexagonal high-strength bolts can be directly tested on the computer. After assembling the corresponding hexagonal support fixture, tighten the nut with a standard torque wrench at a uniform speed. The tester collects the torque and axial pretension in real time, automatically calculates the torque coefficient, average value and variation coefficient, automatically stores the curve and issues a compliance test report. The whole process is completed independently by the host computer without adding other power tools.

2. Anti-slip coefficient detector+sliding plate electric torsion machine, and complete the friction surface test by standardization.


The anti-slip coefficient detector is specially designed to detect the anti-slip coefficient of the friction surface of high-strength bolt connection of steel structure, which is a mandatory key index for the acceptance of friction-type high-strength bolt joints, and directly determines the anti-shear bearing capacity of steel beam, steel column, grid structure, bridge and other steel structure joints. If the value is not up to standard, it is easy to cause joint slip, deformation and even structural safety accidents, and it is mandatory to submit for inspection according to new standards such as GB50205 and GB/T1231.

The only function of the sliding plate electric torsion machine is to uniformly tighten the bolts of the sliding test specimen: after assembling the sliding steel plate specimen with friction surface, the pre-tightening force stipulated by the national standard is synchronously and evenly applied by the torsion machine, and the friction surfaces of the two steel plates are tightly attached, thus completely eliminating the data distortion caused by uneven manual tightening force and eccentric stress.

After the pre-tightening process is completed, the anti-slip coefficient detector applies a horizontal shear load, automatically captures the sliding critical load, accurately calculates the anti-slip coefficient of the friction surface, and adapts to various process steel plates such as sand blasting, shot blasting and anti-corrosion coating, which is a necessary safety inspection item for steel structure joints.

3. 200-ton universal testing machine+special fixture for high-strength bolts to complete the destructive test of M12-M36 bolts.

The bearing capacity of the 200-ton universal testing machine is sufficient, covering all the 8.8-grade and 10.9-grade high-strength bolts from M12 to M36. The standard tests can only be carried out with the matching high-strength bolt test fixture: bolt physical tensile test, nut guaranteed load test and bolt wedge load strength test.

The 200t universal testing machine, as the main heavy equipment of the whole testing system, undertakes the ultimate mechanical testing of raw materials;

The tensile strength, yield strength and elongation of steel plate base material, bolt rod and nut gasket are tested with special AIDS for stretching, bending, shearing and bolt stretching. It can carry out physical damage tensile test of high-strength bolts, bearing capacity test of thick steel plates and heavy forgings. It forms a closed-loop quality inspection chain with the previous bolt calibration and anti-slip test: parent material performance testing → bolt torque axial force calibration → friction surface slip coefficient verification, and the whole process data is complete and traceable, meeting the high-standard testing requirements of third-party testing centers, large steel structure factories and road and bridge wind power infrastructure laboratories.

Fourth, the core advantages of complete sets of equipment


1, supporting collaboration, process standardization

The torsional shear electric wrench is matched with the bolt detector to calibrate the torsional shear bolt; The sliding plate torsion machine cooperates with the anti-sliding detector to complete the pre-tightening and pressurization of the specimen, and the operation flow of the whole set of equipment completely conforms to the new standard test steps;

2, the same factory seiko, unified precision

The main engine, twisting equipment, wrench, tooling and 200-ton universal testing machine are all independently produced by Jinan Liling, with unified technology and calibration standards, and good equipment compatibility, without the problem of accessories from different manufacturers being stuck;

3. The acceptance is worry-free and the qualification is complete

The equipment has the measurement and calibration conditions, and the software and hardware report templates meet the requirements of GB/T1231-2024 and GB50205, so it is easy to deal with supervision sampling inspection and laboratory review;

4. One-stop service and peace of mind

It can be assembled freely as required, providing on-site installation and debugging, practical training, lifelong after-sales calibration and maintenance, and supporting customization of non-standard tooling, adjustment of equipment range and software program.

Fifth, a wide range of applicable scenarios


Factory calibration of fastener manufacturers, self-inspection of steel structure processing plants, third-party testing institutions, and laboratories of road and bridge/workshop/wind power/grid infrastructure projects department can all be configured in combination as required.

High-strength bolt is the safety skeleton of steel structure engineering, and three key detection links are indispensable, from the torque pre-tension calibration of connection pair, the anti-skid performance of friction surface and the ultimate mechanical strength of bolt body. Jinan has made efforts to standardize the complete testing scheme, strictly benchmark the latest national standard, accurately control each set of test data, and build the bottom line of steel structure engineering quality and safety in all directions.