3results about How to "Guaranteed fatigue performance" patented technology

The invention discloses easy-to-weld drawing-resistant low-alloy high-strength steel for a seat torsion bar and a production method, and belongs to the technical field of cold-rolled plate strip production in the metallurgical industry. The steel comprises the following chemical components in percentage by weight: 0.045 to 0.070 percent of C, 0.35 to 0.45 percent of Si, 1.2 to 1.5 percent of Mn, less than or equal to 0.010 percent of P, less than or equal to 0.001 percent of S, 0.02 to 0.05 percent of Als, 0.015 to 0.035 percent of Nb, 0.08 to 0.10 percent of Ti and the balance of Fe and inevitable impurities. And the carbon equivalent CE is equal to 0.245 to 0.320. Through component design and matching with hot rolling, acid rolling and continuous annealing processes, a ferrite matrix and a fine aging precipitated phase are obtained, the yield strength of the high-strength steel reaches 600-760 MPa, and the hardness of a weld joint after high-frequency welding is 1t; and 300 HV0.5 is achieved, and it is guaranteed that the weld joint of the welded pipe is not cracked in the chambering, flattening and special-shaped drawing processes.

The utility model relates to the technical field of automobile parts, and discloses a multifunctional lightweight support which comprises a support body, a cavity is formed in the support body, a reinforcing plate is fixedly connected in the cavity, and a first mounting hole, a second mounting hole and a third mounting hole are formed in the side face of the support body. A lightweight assembly is installed in the support body and comprises a honeycomb core layer, the honeycomb core layer is fixedly connected in the support body and is in a honeycomb shape, the lightweight assembly comprises a foam core layer, the foam core layer is fixedly connected in the support body, and the foam core layer is in a honeycomb shape. The foam core layer is in a foam shape. The cavity is formed in the support body, redundant materials in a non-bearing area are removed, the overall weight is reduced, the reinforcing plate is arranged at the key stress position, a continuous force transmission path is constructed in the stress direction, and light weight and rigidity improvement are achieved.

The application provides a cross plate corner joint welding method, which comprises the following steps: performing the execution track according to a preset welding sequence, completing multi-layer and multi-pass welding of a main joint and corner welding, and sending a posture switching signal to a positioner controller; the positioner controller drives the cross plate workpiece to rotate or overturn to a next welding joint welding posture after receiving the posture switching signal, and feeds back a posture in-place signal; after receiving the posture in-place signal, an independent track program of a stiffened plate corner joint is started, and multi-layer and multi-pass corner welding of the stiffened plate periphery and corner welding are performed; a continuous path motion control mode is adopted to drive a welding gun to move along a correction track in a welding stage, and a point-to-point motion control mode is adopted to drive the welding gun to move to a next starting point in a non-welding displacement stage.