4 results about "Static bending" patented technology

The application relates to the technical field of material testing, and discloses an alumina fiber composite material flexibility testing device and method, which comprises a detection frame body, an external roller shaft support is arranged on one side of the detection frame body, and a pay-off roller and a winding roller are rotationally arranged on the external roller shaft support. The cooperation of the elliptical rotating roller arranged in the detection frame body and the double-roller assembly can not only extrude the material to be detected into a limit bending state in the shape of Chinese character 'z', but also continuously rotate the elliptical rotating roller through an external driving mechanism. During the rotation, the material is subjected to periodic upward lifting and downward releasing beating actions. The design simulates the repeated friction, rubbing and vibration load of the material in actual use, overcomes the defect that the traditional technology can only be used for one-time static bending, and makes the test data more reflect the real flexibility life of the material under long-term dynamic working conditions.

The utility model discloses a static bending force detection device for a flexible circuit board, which comprises a base, a fixed support frame, a movable support frame, a support shaft, a movable plate, a torsion mechanism, a pressing mechanism and a bending driving mechanism, and is characterized in that the fixed support frame is fixedly mounted on the base, the support shaft is rotatably connected onto the base and is fixedly connected with the movable support frame, and the movable plate is fixedly connected with the movable support frame. A movable plate is arranged in the movable supporting frame, a rotating shaft is fixed to the movable plate and rotationally connected with the movable supporting frame, a torsion mechanism used for driving the rotating shaft and the movable plate to rotate is installed on the movable supporting frame, and the fixed supporting frame and the movable plate are each fixedly provided with a pressing mechanism. A bending driving mechanism used for driving the supporting shaft and the movable supporting frame to rotate is installed on the base. The flexible circuit board torsion tester is simple in structure and convenient to operate, can perform bending test and torsion test on a flexible circuit board, and has more comprehensive functions.

The utility model discloses a railway pre-buried U-shaped bolt bending device which comprises a static bending column and comprises an attaching disc, the outer edge of the attaching disc is a concave cambered surface, a plurality of flow holes distributed at equal intervals are formed in the concave cambered surface, a containing cavity is formed in the attaching disc, lubricating oil is filled in the containing cavity in advance, ejector rods are arranged in the flow holes in a sliding mode, the ejector rods are elastically connected with the interior of the containing cavity, and the static bending column is arranged in the containing cavity. When the bolt is tightly attached to the concave arc face of the outer edge of the attaching disc, the end, located outside the flow hole, of the ejector rod is touched to enable the ejector rod to move towards the interior of the containing cavity, and the flow hole is opened. When the bolt is attached to the attaching disc, the bolt touches and abuts against the ejector rod, the ejector rod contracts inwards, the flow hole is opened, lubricating oil in the attaching disc gradually flows out to be immersed on the attaching surface of the bolt and the attaching disc, abrasion caused by sliding friction between the bolt and the attaching disc is reduced, and cracks are further reduced.

The invention provides a method for improving the static bending qualification rate of a 60E1R260 steel rail flash welding joint. According to the method, by controlling the rail bottom foot alignment tolerance, the rail bottom alignment tolerance and the rail waist alignment tolerance which are assembled before welding to be within a specific range and controlling the joint top face alignment tolerance, the rail head alignment tolerance and the rail foot edge horizontal direction alignment tolerance of a welding head after welding to be within a specific range, the obtained welding head can meet the use requirement; the problems that the deflection value meets the requirement and the force value is lower than the standard in the static bending inspection process of the low-strength-grade steel rail are solved.