3results about How to "High quality welding" patented technology

This invention provides a flexible vehicle body assembly system and a vehicle body manufacturing production line, belonging to the field of vehicle body manufacturing technology. The flexible vehicle body assembly system can interface with intelligent vehicles and their bodies, including an assembly station, a lower body positioning device, a side positioning device, a rear positioning device, and a sliding device. The assembly station includes two bases, each with a first and a second column. The two lower body positioning devices are symmetrically distributed on both sides of the intelligent vehicle, and at least partially located on the inner sides of the two bases. The side positioning devices are connected to the first and second columns of the same base, and the rear positioning devices are connected to the two second columns. The sliding device is connected to the base to adjust the relative positions of the two first columns, the two second columns, and the first and second columns. This invention can establish a global coordinate vehicle body positioning system, providing high-precision positioning for different vehicle models, improving the accuracy of assembly dimensions, and enabling cross-architecture vehicle mixed-flow production.

The invention discloses a titanium alloy welding method for realizing a high-quality joint at an ultralow temperature, and belongs to the field of titanium alloy welding. The invention aims to solve the technical problem of low joint quality in the existing diffusion welding method. According to the method, the to-be-welded surfaces are ground and then polished till the root mean square roughness Rq is not larger than 1.5 nm or the arithmetic mean roughness Ra is not larger than 1.0 nm, the maximum roughness depth Rmax is not larger than 50 nm, and through the multi-heat-source diffusion welding technology of pulse current and radiation heating, the microcosmic good welding effect without hole defects at the ultralow temperature of 450-550 DEG C is achieved. According to the method, the welding rate of a welded joint after welding is nearly 100%, high-quality welding is achieved, the joint has obvious yield and plastic fracture, and the tensile strength can reach 826.8599 MPa.

This application relates to a welding fixture for chemical pipelines, belonging to the technical field of pipeline welding equipment. To solve the problem of difficult positioning of chemical pipelines, it includes a frame with two pipe support brackets arranged opposite each other. A clamping mechanism is provided on the frame corresponding to each pipe support bracket. Positioning mechanisms are respectively provided on both sides of the frame. Each positioning mechanism includes a propulsion cylinder, a positioning push plate, and a positioning cone. The propulsion cylinder is connected to the frame, the positioning push plate is connected to the output end of the propulsion cylinder, and the positioning cone is connected to the positioning push plate. The positioning cone is inserted into the inner diameter of the pipeline for radial positioning. This application effectively solves the positioning deviation problem caused by unreasonable structural design of existing welding fixtures, improves the accuracy of pipeline docking positioning, and provides a reliable guarantee for high-quality welding.