3results about How to "Small tonnage" patented technology

The present application relates to B21D26, and particularly to a kind of anti-piling device for thickening material, including stretching station one, baffle and anti-piling station;Stretching station one, baffle and anti-piling station are sequentially arranged from left to right.The anti-piling device for thickening material provided by the present application has simple structure, small mold size, low mold cost, small equipment tonnage, and is convenient to use.The anti-piling station can be replaced according to the original thickness of the material piece and the thickening effect to be achieved, improving the utilization of the device;By adding the process of anti-piling between two times of stretching, the local thickening of the target part of the product is realized while the thickness of other parts of the product is not changed.The production efficiency and material utilization are high when the product is thickened.

The application discloses a semi-solid thixotropic die casting forming method of a narrow solid-liquid two-phase zone alloy, and comprises the following steps: step one: the narrow solid-liquid two-phase zone alloy is added into a heating device and heated to a superheating temperature, and after complete melting, the alloy is cooled for a certain time to obtain an alloy blank with a cast structure; step two: the alloy blank is added into an extrusion device to complete cold extrusion, and an alloy blank containing high-density dislocations and lattice distortion structures is obtained; step three: the alloy blank is heated for the first time, the heating temperature is set between a recrystallization temperature and a solidus temperature of the alloy, and isothermal heat treatment is carried out to obtain fine and uniform recrystallized grains; step four: the alloy blank is heated for the second time, the temperature is set above the solidus temperature of the narrow solid-liquid two-phase zone alloy, and isothermal heat treatment is carried out to obtain a semi-solid blank; and step five: the semi-solid blank is subjected to die casting forming. The application has the advantages that excellent castings with physical properties are formed.

The utility model relates to a two -segment formula foundry lower car body chassis structure and lower car body, wherein, a two -segment formula foundry lower car body chassis structure, including front cabin, rear floor and battery box body, the battery box body includes box body front half part and box body rear half part, one end of box body front half part is integrally formed in front cabin, one end of box body rear half part is integrally formed in rear floor, the other end of box body front half part and the other end of box body rear half part fixed connection. The utility model can relatively reduce the die -casting machine tonnage needed for die -casting processing, and can relatively reduce the welding position needed for chassis structure forming, guarantees chassis structure strength and light weight.