Forming mold and method for ultra-fine grain hollow magnesium alloy profile
A technology of forming dies and forming methods, applied in the direction of metal extrusion dies, etc., can solve the problems of poor processing accuracy of thin pipes, reduced mechanical properties of magnesium alloys, unfavorable secondary processing of thin pipes, etc., to simplify the production process, promote Dynamic recrystallization, the effect of eliminating void defects
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[0028] Example: see Figure 1 to Figure 5 , A molding die for ultra-fine-grained hollow magnesium alloy profiles, comprising a base 1, a concave die jacket 2, a die jacket 2, an extrusion needle 4, an extrusion shaft 5 and an extrusion pad 6. The female die jacket 2 has a tubular structure, and its inner hole is tapered. One end of the female die jacket 2 with a small aperture is fixedly connected to the base 1. The inner sleeve 3 of the concave mold is arranged in the outer sleeve 2 of the concave mold, and the outer wall of the inner sleeve 3 is also tapered, and the outer wall of the inner sleeve 3 and the inner wall of the inner sleeve 2 are in close contact; the inner sleeve 3 and the outer sleeve 2 pass The tapered structure fits together, so that the inner sleeve of the cavity 3 and the outer cavity of the cavity 2 are matched through a prestressed combination, which can increase the strength of the entire cavity and prevent the mold from being crushed, thereby making th...
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