2results about How to "Large plastic deformation" patented technology

The invention relates to a method for strengthening the surface of a cathode roller, which is characterized in that turning, grinding, shot blasting and polishing are taken as the basis, a new machining method is formed by combining new working procedures, the coaxiality of the surface of a titanium cylinder of the machined cathode roller is less than or equal to 0.05 mm, the circle run-out degree is less than or equal to 0.05 mm, the straightness is less than or equal to 0.05 mm, and the surface roughness is less than Ra 0.3; the mirror surface effect is achieved, and surface defects such as cross grains, cross grains, chromatic aberration and bright spots are avoided; the stress corrosion resistance of the cathode roller titanium cylinder is improved, the time of surface defects in the electrolytic copper foil production process is greatly delayed, the service life of the cathode roller is prolonged, the production efficiency of the cathode roller is improved, the effect superior to that of an existing machining method is achieved, the corrosion resistance of the cathode roller is remarkably improved, and the service cycle of the cathode roller is greatly prolonged. And the product meets the use requirements of high-end copper foils with high tensile strength and high elongation. According to the method, the required equipment is high in maturity, the equipment purchase cost and the processing cost are not obviously increased, and the method has good operability and economical efficiency.

This utility model belongs to the field of seismic isolation and vibration reduction technology for bridge structures, and specifically relates to a shear energy-dissipating steel truss connecting beam for replaceable railway piers. It includes several steel truss connecting beam units, spaced apart along the height of the pier column. At the same height position, there are four steel truss connecting beam units, each positioned between adjacent pier columns. Each steel truss connecting beam unit includes horizontally arranged upper and lower chords, and at least one set of intersecting diagonal web members between the upper and lower chords. The chords are structural members designed to prevent instability of the outer web members of the pier column. The web members mainly bear axial forces and reduce seismic response by dissipating energy through tensile and compressive deformation. This structure dissipates energy through plastic deformation and yielding, thereby protecting the pier column and achieving a graded energy dissipation effect. Furthermore, the steel truss connecting beam system is easy to replace after damage, and the replaced pier can immediately resume normal use, playing an important role in post-earthquake repair and operation of bridges.