CN115213369A - Die-casting forming method for solving forming stability of die-casting - Google Patents

Abstract

The invention provides a die-casting forming method for solving the forming stability of die castings, which relates to the technical field of die-casting and comprises the steps of 1) putting metal raw materials into a smelting furnace which is preheated and heated, and heating and melting the metal raw materials to obtain molten metal; 2) Transferring the molten metal into a heat-preserving furnace, adding a solid metal modifier into the aluminum alloy liquid, and uniformly stirring; 3) Preheating a die-casting die, spraying a layer of release agent on the inner surface of a cavity of the die-casting die, pouring molten metal in a heat preservation furnace into the die-casting die through a pouring gate on the die-casting die, and preparing for die-casting; 4) Before die-casting, the steel mold insert is placed on the static mold core, the static mold core fixes the mold insert to move in the radial direction, and the two movable mold cores are axially placed to prop against the mold insert. According to the invention, the installation of the steel insert is advanced to the die-casting link, and the problem of possible play of the insert under the impact of high-speed high-pressure alloy liquid is effectively avoided through the matched use of the static die core and the movable die core.

Description

Die-casting forming method for solving forming stability of die-casting

Technical Field

The invention relates to the technical field of die casting, in particular to a die-casting forming method for solving the forming stability of a die casting.

Background

Die casting is a metal casting process and is characterized in that high pressure is applied to molten metal by utilizing an inner cavity of a die. The mold is typically machined from a stronger alloy, a process somewhat similar to injection molding.

In the existing die-casting process, because the insert is not fixed well during die-casting, a steel sleeve of a bearing hole of a general die-casting piece is embedded in a pressing mode by a pressing machine, but an aluminum casting piece is cracked due to the pressing of the steel sleeve, and the pressing machine is required to be input, so that the process cost is increased.

Disclosure of Invention

The invention aims to provide a die-casting forming method for solving the forming stability of a die-casting piece, which can solve the problem of possible movement caused by the impact of high-speed high-pressure alloy liquid due to the problem of insert fixation.

In order to solve the technical problems, the technical scheme of the invention is as follows: a die-casting forming method for solving the forming stability of die castings comprises the following steps:

1) Putting metal raw materials into a preheated smelting furnace, and heating and melting to obtain molten metal;

2) Transferring the molten metal into a heat-preserving furnace, adding a solid metal modifier into the aluminum alloy liquid, and uniformly stirring;

3) Preheating a die-casting die, spraying a layer of release agent on the inner surface of a cavity of the die-casting die, pouring molten metal in a heat preservation furnace into the die-casting die through a pouring gate on the die-casting die, and preparing for die-casting;

4) Before die-casting, placing a steel insert on a static mold core, fixing the play of the insert in the radial direction through the static mold core, and axially placing two movable mold cores to support the insert so as to prevent the play of the insert in the axial direction;

5) During die casting, an injection punch is adopted to form ultra-low speed die casting on the molten metal, and finally the molten metal is injected into a cavity of a die casting die;

6) And opening the die, spraying cooling water to the cavity, and taking out the die casting from the cavity.

Has the advantages that:

the die-casting forming method for solving the forming stability of the die-casting part, disclosed by the invention, has the advantages that the installation of the steel insert is advanced to the die-casting link, and the problem of possible movement of the insert under the impact of high-speed high-pressure alloy liquid is effectively avoided through the matched use of the static die core and the movable die core. Meanwhile, the problem that a bearing hole needs to be processed can be solved, so that the defect of air hole isopiestic pressure casting after processing is avoided, and the problem that an aluminum casting mounting steel sleeve cracks is solved.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

A die-casting forming method for solving the forming stability of die castings comprises the following steps:

1) Putting metal raw materials into a preheated smelting furnace, and heating and melting to obtain molten metal;

2) Transferring the molten metal into a heat-preserving furnace, adding a solid metal modifier into the aluminum alloy liquid, and uniformly stirring;

3) Preheating a die-casting die, spraying a layer of release agent on the inner surface of a cavity of the die-casting die, pouring molten metal in a heat preservation furnace into the die-casting die through a pouring gate on the die-casting die, and preparing for die-casting;

4) Before die-casting, placing a steel insert on a static mold core, fixing the play of the insert in the radial direction through the static mold core, and axially placing two movable mold cores to support the insert so as to prevent the play of the insert in the axial direction;

5) During die casting, an injection punch is adopted to perform ultra-low speed die casting on the molten metal, and finally the molten metal is injected into a cavity of a die casting die;

6) And opening the die, spraying cooling water to the cavity, and taking out the die casting from the cavity.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, principal features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. .

Claims (1)

1. A die-casting forming method for solving the forming stability of die-casting parts comprises the following steps:

1) Putting metal raw materials into a preheated smelting furnace, and heating and melting to obtain molten metal;

2) Transferring the molten metal into a heat-preserving furnace, adding a solid metal modifier into the aluminum alloy liquid, and uniformly stirring;

3) Preheating a die-casting die, spraying a layer of release agent on the inner surface of a cavity of the die-casting die, pouring molten metal in a heat preservation furnace into the die-casting die through a pouring gate on the die-casting die, and preparing for die-casting;

4) Before die casting, placing a steel insert on a static mold core, fixing the play of the insert in the radial direction through the static mold core, and axially placing two movable mold cores to prop against the insert to prevent the play of the insert in the axial direction;

5) During die casting, an injection punch is adopted to perform ultra-low speed die casting on the molten metal, and finally the molten metal is injected into a cavity of a die casting die;

6) And opening the die, spraying cooling water to the cavity, and taking out the die casting from the cavity.