High-strength bolt detector with corner method is suitable for detecting M12-M30 short bolts.

In the inspection of steel structure, wind power equipment and machinery manufacturing, M12-M30 high-strength bolts are widely used, among which the short bolts for curtain wall bracket, small flange and equipment base are always difficult to overcome by conventional inspection equipment. Our mature detector for torque and axial force of high-strength bolts with corner method can stably detect short bolts with a length of 40mm by optimizing the fixture structure. One device covers M12 to M30 full-size hexagonal high-strength bolts with torsion shear type of 8.8/10.9, which is suitable for normalized quality inspection in many industries.
Due to the limitation of fixture structure, conventional testing equipment can only test long bolts over 60mm, short bolts are easy to be eccentric in clamping, and the test curve fluctuates greatly, so it is impossible to complete compliance re-inspection. This equipment is equipped with a special coaxial positioning fixture, which does not need complicated conversion accessories, and the short bolts are firmly clamped in the center, and the test data has good repeatability and small error. The short bolts with small specifications need not be replaced, which greatly improves the testing efficiency of the laboratory.

Multi-scenario core application value
1, engineering testing institutions, steel structure project approach re-inspection.
According to GB/T 16823.3 standard of torque angle method, batch acceptance of bolts for workshop, grid, small bridge and curtain wall is completed. It can completely duplicate the construction technology of initial screwing and final screwing of corners, accurately measure the torque coefficient and the corresponding pre-tightening force of each corner, and issue a test report with acceptance effect. Aiming at M12 and M14 short bolts of curtain wall, it solves the pain point that no equipment can be measured in the past inspection, and meets all testing requirements for project completion acceptance.
2, wind power, construction machinery, pressure vessel production enterprises
M20-M30 short high-strength bolts are widely used in fan engine room base, small tower flange, pump valve and construction machinery frame. Through the synchronous acquisition of torque, rotation angle and axial force, the equipment calculates the yield angle and elastic-plastic tightening interval of bolts, compares the influence of different gaskets and lubrication processes on the pre-tightening force, and formulates a standardized assembly process to avoid the problems of loose connection and flange leakage caused by equipment vibration from the source.
3, fastener manufacturers factory type inspection
Fully cover the factory inspection of M12-M30 full-size bolts, automatically generate a complete whole process curve of torque-rotation angle-axial force, calculate parameters such as torque coefficient and ultimate pretension, support batch storage and export of inspection reports, and meet the requirements of product factory certificate and third-party certification data retention; It can also be used to optimize the thread processing and surface treatment process and stabilize the performance of each batch of bolts.
4, process research and development and quality failure arbitration analysis
Support the comparative test of tightening characteristics of long and short bolts, and study the variation law of axial force of short bolts; In the face of quality disputes such as joint slip and bolt fracture of steel structure, the quality defects of under-screwing, over-screwing and products themselves can be distinguished by the complete original test curve, and the test data can be used as an effective basis for quality arbitration.

Outstanding advantages of equipment
1. The specifications are universal: complete sets of sleeve tooling are matched to inspect all common high-strength bolts M12, M14, M16, M18, M20, M22, M24, M27 and M30;
2. Special adaptation of short bolts: support the stability test of 40mm short bolts at least to eliminate eccentricity and data distortion;
3. Synchronous acquisition: Real-time synchronous acquisition of torque and axial force, which fully meets the requirements of French standard test of rotation angle;
4. Servo automatic loading: the tightening speed can be adjusted steplessly, and the curve can be automatically stopped after the test, so as to reduce the human operation error;
5. The measurement is compliant and reliable: both torque and axial force can be separately sent for measurement, and the test data has legal effect.

As a mature testing equipment, this corner high-strength bolt detector has served major testing laboratories and manufacturing enterprises for many years, effectively solving the blind spot of short bolt detection in the industry and providing a stable and accurate one-stop testing solution for the whole process quality control of various high-strength bolts.