2results about How to "Flexible specifications" patented technology

The application discloses a copper-aluminum composite pipe blank preparation device and method based on bidirectional cooling control, and belongs to the technical field of metal composite solid-liquid casting. The device comprises coaxially arranged inner and outer crystallizers, a positioning base, an aluminum pipe outer mold and a split runner. The aluminum pipe and the inner crystallizer form an annular casting cavity, and the inner and outer crystallizers are provided with bidirectional cooling channels. The method comprises coaxial assembly, copper melt smelting in a protective atmosphere, split uniform casting and inner-outer cooperative forced cooling. The application precisely regulates the temperature field through bidirectional cooling, shortens the high-temperature contact time of copper and aluminum, suppresses the growth of brittle intermetallic compounds, reduces interface oxidation, pores and inclusions and improves the metallurgical bonding strength. The device structure is simple, the specification is adjustable, the production efficiency is high, the problems of poor interface bonding and many defects in traditional composite pipe preparation are effectively solved, and the device is suitable for the industrialized production of copper-aluminum composite pipe blanks in the fields of electric power and automobiles.

------14 / 01 / 2563------(OCR) The assembled rail sleeper is a double block reinforced concrete steel pipe joint assembly consisting of a first concrete rail sleeper block (1), a second concrete rail sleeper block (2), and a large number of matching reinforced concrete steel pipe joint columns (3). All of the above are independently assembled. These components are separated by welding during transport and warehouse assembly, and after being unloaded at the construction site, the reinforced concrete steel pipe joint columns (3) and the rail sleeper blocks are assembled into one by threading or slurry welding. Not only can the fastening and assembly process be realized quickly with high precision at the construction site, but it can also ensure that the rail sleeper is assembled with good form and positioning ability while significantly reducing the use of connecting pieces. In particular, the rail sleeper has a distinct advantage in reducing the difficulty of entering into the welding process in large quantities, for example, in warehouse assembly, transport and construction, improving process efficiency and reducing costs. ------------ What was provided were double-block reinforced concrete railway sleepers with steel tube components. Consisting of the first (1) concrete railway sleeper block, railway sleeper block The second type of concrete (2), and numerous matching steel pipe reinforced concrete columns (3) in total. As mentioned above, these components are processed independently; they are separated but connected during transport. And connected to the warehouse and, after being transported to the construction site, the columns of reinforced concrete pipes. Steel(3) and railway sleeper blocks are assembled together using thread or slurry of Welding is not just a process of fastening and assembly; it can be realized quickly with high precision. At the construction site, however, it can still be ensured that the railway sleepers are arranged in a good manner. The ability to maintain position while significantly reducing the use of connecting pieces, especially wood. Railway sleepers have a significant advantage in reducing the difficulty of the connection process. Many examples illustrate this in manufacturing, warehousing, transportation, and construction, focusing on improving process efficiency. Cost reduction