Forming method for large aluminum alloy die-casting fitting

Abstract

The invention discloses a forming method for a large aluminum alloy die-casting fitting. First, an upper die forming region is machined on an upper die, and a low die forming region is machined on a lower die; an auxiliary cavity is machined in the position, corresponding to the lower exposed face of the die-casting fitting, of the parting face of the lower die, and an auxiliary ejector rod is arranged in the auxiliary cavity; when the upper die and the lower die are closed, the upper die forming region and the lower die forming region jointly construct a cavity of a die-casting die, a die-casting fitting is formed inside the cavity, and an auxiliary forming portion connected with the edge of the die-casting fitting is formed inside the auxiliary cavity; then, an ejector rod arranged on the lower die and the auxiliary ejector rod push the die-casting fitting and the auxiliary forming portion to move together, so that the die-casting fitting is separated from a cavity core; the die-casting fitting with the auxiliary forming portion is taken down, and the complete die-casting fitting can be obtained after the auxiliary forming portion is removed through a cutting device. The unbalanced stress when the product is ejected out can be effectively improved, in this way, deformation generated when the product is ejected out is avoided, and the forming quality of the large die-casting fitting is easily improved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy die casting technology, in particular to a forming method of a large aluminum alloy die casting. Background technique [0002] Aluminum alloy die-casting technology is widely used in electronics, automobiles, motors, home appliances, communications and other industries. It can form mechanical parts with complex shapes, save a lot of machining time, and reduce material loss, which is conducive to improving production efficiency. Suitable for mass production. Aluminum alloy die-casting needs to process a set of die-casting molds first. The die-casting mold has an upper mold and a lower mold. Usually, a cavity matching the shape of the product and an inlet runner connected to the cavity are set on the upper mold. The core and the corresponding ejection mechanism that are set on the mold and the inner cavity of the product, when the upper and lower molds are installed on the die-casting machin...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems existing in the die-casting molding method of the prior art that it is impossible to set ejector pins on the lower mold corresponding to the exposed surface of the product, resulting in unbalanced force and easy deformation of the product when the product is ejected, and provides A forming method for large aluminum alloy die-casting parts, which can effectively improve the force imbalance problem when the product is ejected, thereby avoiding the deformation of the product during ejection, and is conducive to improving the forming quality of large-scale die-casting parts

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