3results about How to "Reduce casting difficulty" patented technology

A method for manufacturing a large-scale balance weight of a steel sheet pile ship lift, which simplifies the processing flow of the large-scale balance weight. The method first cuts a continuous casting steel blank into single pieces of steel sheet pile with grooves, and measures and marks the steel sheet pile. Then, two groups of steel sheet pile are assembled together by processing and pre-installing gap pads. After the preliminary assembly is completed, the balance weight is marked again, and then the locking bolt holes, pin shaft holes and lifting lug holes are drilled and processed, and the holes are counterbored. The next step is to cut and install the edge plates at the top and bottom of the grooves. The trial lifting is performed and the lifting shaft hole reinforcing plates are pre-installed to ensure the stability of the structure. The stop seat plates are further processed and installed to provide protection for the final stability. Finally, the overall performance of the balance weight is verified by the second trial lifting, and the remaining edge plates are pre-installed. The present application can realize efficient processing of large-scale steel sheet pile balance weight by using conventional general equipment.

This invention provides a rolling process for eliminating noise during flaw detection of high-strength aluminum alloy sheets with low alloy content. The process employs a three-stage homogenization heat treatment: heating at 40℃ / h to 400-405℃ and holding for 3 hours; heating at 40℃ / h to 445-460℃ and holding for 10-24 hours; heating at 10℃ / h to 492-496℃ and holding for 8-24 hours; and then rolling at 420℃. The rolling process uses 9-15 passes, with the first three passes being rapid rolling and the last three passes using a large reduction (greater than 17% reduction per pass) for rapid rolling. The middle passes use a large reduction for rapid rolling, while the remaining passes use a small reduction for slow rolling. The final rolling temperature is not lower than 410℃. The thick plates obtained by this rolling process have a uniform microstructure along the thickness direction, small grain size, pass non-destructive testing, and possess high strength, plasticity, and fracture toughness.

The application provides an engine air intake unit structure, an air intake assembly structure and an engine. The engine air intake unit structure comprises an air intake header and a methanol injector. The air intake header comprises an air intake pipe section with open ends and a mixing pipe section in communication with the air intake pipe section. The air intake pipe section extends along a first direction, and the mixing pipe section extends along a second direction. The first direction is perpendicular to the second direction. An end of the mixing pipe section away from the air intake pipe section is used to be in butt joint with an engine cylinder head. At least two injection positions are arranged on the mixing pipe section. The methanol injectors are arranged at the injection positions. Multiple methanol injectors inject methanol into the mixing pipe section. The injection directions of the multiple methanol injectors intersect with each other in a plane perpendicular to the second direction. The technical scheme of the application integrates the methanol injectors and the air intake header into an independent unit module, avoids direct corrosion of the methanol on the cylinder head, reduces the difficulty of improvement of the cylinder head, prolongs the mixing path of the methanol and air, and improves the uniformity and optimizes the combustion by cooperating with the cross injection of the methanol injectors.