A device and method for preparing a low-melting-point alloy core with a lattice structure

Abstract

The invention provides a device for manufacturing a low-melting-point alloy mold core of a lattice structure. The device comprises a punched inner core, a casting mold and a cross beam. The punched inner core is a metal rod with the thermal expansion rate higher than that of a low-melting-point alloy. The casting mold is provided with a mold cavity, magnets and clamping grooves, wherein the magnets are embedded in the bottom of the mold cavity and can fix the lower end of the punched inner core, and the cross beam is fixed through the clamping grooves; and the magnets are embedded in the cross beam, and the upper end of the punched inner core is fixed through the magnets. According to a method for manufacturing the low-melting-point alloy mold core, the principle that the cold shrinkage amount of the punched inner core is larger than that of the low-melting-point alloy is used, a measure that the punched inner core is fixed in a magnet attraction manner is taken, and the purposes of natural mold releasing and convenient locating are achieved. Compared with a traditional preparation method for the lattice structure, the method has the beneficial effects that operation is easy, the production efficiency is high, the hole forming quality is good, and cost is low.

Description

technical field [0001] The invention relates to a preparation device for engineering materials, in particular to a preparation device for a low-melting-point alloy core with a lattice structure. Background technique [0002] The lattice structure is a porous structure in which the core is sandwiched between the upper and lower panels, and the rods in the core are arranged in an orderly manner according to a certain period. The lattice structure has the advantages of high strength and toughness, blast resistance, sound absorption and electromagnetic wave absorption, heat insulation and heat dissipation, etc. Because of its excellent mechanical properties and multi-functional designability, it has great potential in aerospace, high-speed rail, automobiles, ships and other fields. The broad application prospects have also attracted domestic and foreign scholars to conduct research. At present, the basic theory of mechanical properties has been perfected, but the preparation de...

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Problems solved by technology

There are usually two methods for opening holes: one is to perform mechanical drilling after the forming is completed. If a large number of inclined holes with different angles are drilled inside, this method has low work efficiency and difficulty in ensuring accuracy; in addition, for low melting point alloys , the high temperature generated during drilling will melt the metal, and the drill bit may be stuck, so it is not suitable to use mechanical drilling method

Another method is to use the sand mold method, casting together with the hole during preparation, and take out the filling core in the hole after cooling. This method is complicated to manufacture, and the surface quality of the casting is poor, especially for small and high-precision holes.

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