8 results about "Pull off test" patented technology

This utility model provides a pull-out testing fixture with a clamping mechanism, relating to the field of pull-out testing technology. It includes a base, with a rectangular seat fixed to the upper end of the base. Clamping blocks are movably mounted on the four inner walls of the rectangular seat. A driving assembly is located at the lower end of the rectangular seat. The driving assembly includes movably mounted connecting rods and connecting rings. The upper end of each connecting rod is integrally formed with the lower end of a clamping block. The four connecting rods are sleeved with the connecting rings. Each connecting rod has a ramp on its outer surface, and the ramp abuts against the inner wall of the connecting ring. This utility model uses an electric telescopic rod to flexibly raise and lower the connecting rings. After the connecting rings move upwards, they slide from the lower end of the ramp to the upper end, causing each connecting rod to simultaneously move towards the axis of the rectangular seat. This allows the connecting rods to drive each clamping block to move synchronously, clamping the material simultaneously, ensuring uniform force on the material, simplifying the operation process, and improving testing efficiency.

This utility model provides an automatic pull-out testing device, belonging to the technical field of automatic pull-out testing equipment. It includes a workbench, with a display screen fixedly connected to the rear left side of the top of the workbench. A six-station correction group is fixedly connected to the front left side of the top of the workbench. A station template feeding group is located in front of the station correction group, and station detection and operation indicator lights are located in front of the station template feeding group. This utility model achieves efficient multi-station testing through the cooperation of the dual six-station system, the XYZ three-axis conveying mechanism, and the pull-out testing head group. It can perform multiple testing tasks simultaneously. When station one is testing, station two can be prepared for material feeding simultaneously, significantly shortening the overall testing cycle and greatly improving testing efficiency. Furthermore, the alternating operation mode of the dual stations fully utilizes the equipment's operating time, reducing idle waiting time, and significantly increasing production capacity compared to traditional single-station equipment.

This invention relates to an apparatus and method for measuring the bonding strength of multilayer D2W hybrid bonded chips, belonging to the field of semiconductor packaging technology. It addresses one of the problems of inaccurate and large errors in measuring the bonding strength of multilayer, small, and thin D2W hybrid bonded chips. The method of this invention uses the centripetal force generated during the chip's high-speed rotation to replace the tensile force applied during the pulling process. Since the centripetal force always acts perpendicularly towards the center of rotation, it is always uniformly applied to the bonding interface, avoiding stress concentration. The test is conducted under vacuum conditions, avoiding the influence of air resistance on the test structure's side surface on the uneven distribution of centripetal force under high-speed rotation. Extensive testing revealed that a correction factor α needs to be added to the calculation of bonding strength. This correction factor was obtained through comparison with currently widely accepted pull-out tests and is highly representative.

The application discloses a method for matching the oxide skin state and the shot blasting performance of Q355 grade engineering machinery steel, which comprises the following steps: S1, taking two samples with the same size, measuring the residual area S1 of the oxide skin of the A sample by using a 3D profile measuring instrument, measuring the total measurement area S0, and testing the adhesion F of the B sample by using an adhesion pull tester; S2, cutting a metallographic analysis sample from the A sample, polishing and polishing the cross section, and then corroding the cross section by using 4% nitric acid-alcohol metallographic liquid, observing the cross section morphology by using a metallographic microscope, and measuring the total thickness T of Fe3O4 and FeO; S3, comprehensively analyzing the shot blasting performance of the oxide skin according to the residual area S1 of the oxide skin, the adhesion F and the thickness T of the oxide skin, and selecting a proper shot blasting process according to the analysis result. The method has the advantages that the shot blasting performance of the oxide skin can be quantitatively evaluated, the evaluation result is matched with the shot blasting pellet size, and the shot blasting effect of the oxide skin is greatly improved.

This utility model discloses a resin anchor pull-out tester fixture, comprising: a hydraulic cylinder, a sleeve, and an anchor cable lock. The anchor cable lock is installed on the end of the resin anchor to be tested. The sleeve is fitted on the outside of the anchor cable lock. The top of the cylinder of the hydraulic cylinder is mounted on the sleeve. The telescopic shaft of the hydraulic cylinder is connected to the anchor cable lock. The pull-out test of the resin anchor is performed by controlling the extension and retraction of the hydraulic cylinder. The anchor cable lock includes: a lock head, multiple wedge-shaped clips arranged in a ring in the lock head, and a cylinder connector. The cylinder connector is connected to the lock head through a connecting bracket. The lock head has a mounting through hole for installing the wedge-shaped clips. The end of the resin anchor passes through the mounting through hole of the lock head and is fixed in the lock head by the multiple wedge-shaped clips. The cylinder connector is used to connect and fix with the telescopic shaft of the hydraulic cylinder, realizing efficient, accurate, and stable pull-out test of the resin anchor, improving the testing efficiency and accuracy, and enhancing the applicability and reliability of the equipment.

This invention relates to an indoor pull-out testing device and method for expansion anchor bolts based on transparent rock mass, belonging to the field of geotechnical engineering and tunnel support technology. The testing device includes a confining pressure loading system, a transparent chamber, an anchor bolt pull-out system, and a non-contact strain monitoring system. The transparent chamber is filled with transparent rock mass with a matching refractive index, and pre-drilled channels are installed within the rock mass to accommodate the expansion anchor bolts to be tested. During the pull-out process, an industrial camera captures real-time images of the full-domain deformation of the rock mass and anchor bolt through the transparent chamber, and the evolution data of the strain field at the anchoring interface is obtained by combining digital image correlation technology. This invention achieves visualized monitoring of the entire anchoring process of expansion anchor bolts, avoids mechanical interference from anchor bolt expansion on sensors, can simulate complex stress environments, and provides an experimental platform for the study of anchoring mechanisms.

The utility model provides a kind of clamping device for coating adhesion pull-off method test equipment, it is related to coating adhesion pull-out test technical field, including pull-out test equipment and a variety of different specifications of pull head, further including mounting bracket;The coating adhesion of the workpiece to be measured can be bilaterally pulled out test in the application, application scene is more extensive, while adjustable three-way clamping can be carried out to the pull head of different test column area, and then without producing several steel plates and the clamping groove of corresponding size can be completed clamping, the adaptation range of pull-out testing machine clamping different specifications size pull head is improved, and then the use effect of coating adhesion pull-off method test equipment is better.