2results about How to "Prevent transverse cracking" patented technology

The invention relates to the technical field of display panel cutting, in particular to a display panel cutting method based on crack propagation, and mainly solves the technical problems that an existing display panel cutting method is low in cutting yield, easy to cause cutting damage and high in cutting cost. According to the method, firstly, the starting point of a pre-cutting path is heated and softened through a laser beam, then a cutting wheel is used for pressing downwards to form a paddle-tumbler, then a hot crack is formed below the paddle-tumbler through the laser beam, and finally the hot crack is guided to move along the pre-cutting path through movement of the laser beam, so that the display panel is broken automatically. According to the method, only the cutter wheel and the display panel need to be in short contact to complete indentation treatment, transverse cracks caused by long-time contact of the cutter wheel and the display panel can be effectively avoided, and therefore the cutting yield can be increased; and meanwhile, the laser beams cannot generate dust in the cutting process, so that a complex dust removal and cleaning system does not need to be arranged, cutting damage can be avoided, and meanwhile the cutting cost is effectively reduced.

This utility model discloses a reinforcement structure for cracking of segmental joints in long-span continuous concrete box girders. It includes an inner reinforcement component located inside the box girder and an outer reinforcement component located outside the box girder. The inner reinforcement component includes multiple sets of first longitudinal narrow steel plates fixed at intervals along the bridge direction on the inner bottom plate, and straight wide steel plates fixed at the front and rear ends of the inner bottom plate along the transverse bridge direction, covering the segmental joint area. The outer reinforcement component includes multiple sets of second longitudinal narrow steel plates fixed at intervals along the bridge direction at the bottom of the outer bottom plate, and U-shaped wide steel plates located at both ends of the outer side of the box girder, covering the segmental joint area. In this reinforcement structure, all steel plates are anchored with anchor bolts, ensuring full contact between the steel plates and the box girder, resulting in stability and reliability. This effectively improves the bending and torsional bearing capacity, crack resistance, and dynamic stiffness of the segmental joints in the box girder.