Multidirectional extrusion die and method
A multi-directional extrusion and mold technology, applied in the direction of metal extrusion molds, etc., can solve the problems of limited application, small strain, and difficulty in preparing micro-nano-sized metal materials, etc., and achieve the effect of improving work efficiency and simple process operation
Active Publication Date: 2020-09-11
YANSHAN UNIV
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Problems solved by technology
Ordinary multi-directional extrusion has a small strain, and it is difficult to prepare micro-nano-sized metal materials, which limits its application in severe plastic deformation processes
Method used
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Embodiment 1
[0025] Such as Figure 1-3 As shown, this embodiment provides a multi-directional extrusion die, including an upper extrusion head 1, a first blank 2, a second blank 3, a third blank 4, an extrusion die 5, a lower extrusion Pressure head 6, side extrusion pressure head 7. A vertical extrusion channel and a horizontal extrusion channel are processed in the extrusion die 5, and the diameter of the vertical extrusion channel is the same as that of the horizontal extrusion channel, and the diameter of the lower extrusion pressure head and the side extrusion pressure head is the same as that of the extrusion channel , and the initial distance between the lower extrusion head and the horizontal extrusion channel, and the initial distance between the side extrusion head and the vertical extrusion channel are the same, both being L.
[0026] Among them, due to different plastic deformation capabilities of different metal materials, the initial distance between the lower extrusion pre...
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Abstract
The invention discloses a multidirectional extrusion die and method, and relates to the technical field of metal extrusion deformation. The multidirectional extrusion die comprises an extrusion femaledie, an upper extrusion pressing head, a lower extrusion pressing head and a side extrusion pressing head, and the extrusion female die is internally provided with a vertical extrusion channel and ahorizontal extrusion channel. A blank is extruded into the vertical extrusion channel by the upper extrusion pressing head, and the blank is extruded into the horizontal extrusion channel after encountering the lower extrusion pressing head; the upper extrusion pressing head is withdrawn, the lower extrusion pressing head and the side extrusion pressing head extrude the blank synchronously until the blank is completely in the vertical extrusion channel, and thus one pass of extrusion is formed; and the actions are repeated until the specified extrusion passes are reached, the lower extrusion pressing head is withdrawn, and the upper extrusion pressing head extrudes the blank out from the vertical extrusion channel. The multidirectional extrusion die and method have the characteristics of ordinary extrusion, equal-channel extrusion and the like, large-strain deformation can be realized, thus grains are effectively refined, and mechanical properties of materials are improved.
Description
technical field [0001] The invention relates to the technical field of metal extrusion deformation, in particular to a multi-directional extrusion die and method. Background technique [0002] Extrusion is a pressure processing method that uses a pressure head to pressurize the blank placed in the die to generate plastic flow, thereby obtaining a workpiece corresponding to the shape of the die hole or the concave and convex die. Multi-directional extrusion is based on extrusion using multiple indenters with different loading directions for deformation. Ordinary multi-directional extrusion has a small strain, and it is difficult to prepare micro-nano-sized metal materials, which limits its application in severe plastic deformation processes. [0003] Therefore, there is an urgent need to provide a multi-directional extrusion die and method to solve the above-mentioned problems in the prior art. Contents of the invention [0004] The purpose of the present invention is to ...
Claims
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IPC IPC(8): B21C25/02B21C23/00
CPCB21C23/001B21C25/02
Inventor 张丽丽刘亮骆俊廷张春祥
Owner YANSHAN UNIV