KR20220043267A - Reaction forging molding device with improved filling) - Google Patents

Abstract

The present invention relates to a semi-solid forging device with improved filling, and more particularly, to a semi-solid forging device having excellent filling of molten metal, excellent physical properties and quality even when there is a temperature deviation of molten metal, and improved releasability. The semi-solid forging device of the present invention includes a bolster, a lower mold part, an upper mold part, and a vibrating part.

Description

Reaction forging molding device with improved filling

The present invention relates to a reactor solid forging device with improved fillability, and more particularly, to a reactor solid forging device having excellent fillability of molten metal, excellent physical properties and quality despite temperature variations of molten metal, and improved releasability.

In general, casting technology is an economical method of obtaining a shape by making a mold having an inverse space of the desired shape, and injecting high-temperature liquid metal into it and solidifying it.

Looking at the things that have been the basis of the existing casting methods in the non-ferrous field, there are gravity die casting, low pressure die casting, vacuum die casting, etc. Recently, research and development of forging methods have been actively conducted. is in progress

This vitalization of R&D is essentially tied to the goal of creating high added value for companies according to the demand for quality enhancement, as well as the demand for weight reduction in environmental and economic aspects.

On the other hand, in recent years, using the molten metal casting method or using the vacuum differential pressure casting method to realize 15% weight reduction compared to the low pressure casting method, but the quality is inferior compared to the forging method.

Therefore, the manufacturing method of aluminum products, such as aluminum wheels, has a high unit price, but is being converted to a forging method having relatively excellent quality, and aluminum products are manufactured using a hot forging method.

The hot forging is a plastic working method for manufacturing a material of an approximate shape by pressing a billet with a large press. The metal structure is stretched by the pressurization, and the small micropores inside are compressed to minimize defects to improve strength and toughness. There are advantages to increasing it.

The hot forging method is largely divided into free forging and mold forging. Mold forging is a process of putting a material into a mold and applying compressive stress to mold it into a desired shape. As the product cannot be manufactured and the product is molded through repeated processes in various stages, there are disadvantages in that the manufacturing cost increases and the scale and initial investment of the equipment must be increased. There is a problem in that the mass production capacity and cost competitiveness of automobile parts are limited.

The method developed to compensate for these shortcomings of hot forging is the rotational forging method, and this rotational forging method is largely divided into two steps for the final shape.

That is, the first pre-forming step of the two-step process is a stress-intensive rotational forging step using a relatively small pressing force, and is a process to prepare a basic shape, and then as a second step, flow forming a detailed part ), the spinning process is in progress.

However, this rotary forging and spinning method also has a limit in reducing material cost, which accounts for more than 70% of the cost of parts, because recycling of the material is impossible.

In consideration of this point, a reaction solid forging method that utilizes the advantages of casting and forging well has been proposed, and after dissolving the material and putting it into the mold, solidification and pressurization are performed by an appropriate mechanism to form a complex shape in solid-liquid coexistence. It is a method of molding and producing products of

The reaction solid forging method has a high material adhesion rate by pressurization, a fast solidification rate, and a high production rate. There is an advantage in that it is possible to control the spheroidization of the organization by adding

However, in terms of proper temperature and pressure control in the solid-liquid coexistence section, there is a disadvantage in securing the mass productivity of the wrought material, and there is a disadvantage that it is difficult to see further progress in weight reduction due to the limitation of the physical properties of the cast material.

To solve this problem, a method for manufacturing an aluminum wheel using a complex process of solid-state forging and flow forming has been proposed in Patent Document 0001 (KR10-2013-0123651A, hereinafter referred to as 'Patent Document 0001').

Patent Document 0001 discloses a reaction high forging process of forming a preform using a wrought aluminum alloy material, a flow forming process through flow forming, and a reaction high forging process of aluminum 6000 series material with high physical properties. And through the flow forming process, there is an advantage that can be easily manufactured into an ultra-light and high-strength aluminum wheel.

However, before machining the center hole on the preformed wheel, that is, when T6 heat treatment or solution heat treatment is performed with the hub surface of the preformed wheel closed, the defect rate is lower than the required physical properties such as the tensile strength of the hub and spokes. There was a high problem.

In addition, the temperature deviation of the molten metal is large, and when a complex shape is manufactured, the filling property is not good, which causes pore trapping and double overlapping.

KR10-2013-0123651A (2013.11.13)

An object of the present invention for solving such conventional problems is to provide a reaction solid forging device with excellent filling properties of molten metal, excellent physical properties and quality even when there is a temperature deviation of the molten metal, and improved releasability.

The present invention for achieving the above object,

with bolsters;

a lower mold portion including a lower plate fixedly installed on the bolster, and a lower mold disposed on the lower plate and filled with molten metal in the cavity;

An upper plate disposed on the upper side of the lower mold part, an upper mold fixedly installed at the lower part of the upper plate, and a main cylinder for lowering the upper plate to pressurize the molten metal filled in the cavity of the lower mold by the upper mold. an upper body including;

Provided is a reactor forging device with improved fillability comprising a; a vibrating unit installed on the bolster to apply vibration to the molten metal filled in the lower mold.

Preferably, the vibrating unit is installed on the bottom surface of the bolster.

In particular, it is preferable that the vibrating unit includes a first vibrating unit installed on a bottom surface of the bolster to apply vibration in a horizontal direction, and a second vibrating unit installed in a side surface of the bolster to apply vibration in a vertical direction.

In addition, it is preferable that an insulating plate made of a highly heat-resistant plastic material is provided between the bolster and the vibrating unit.

The reactive high-forging device with improved fillability of the present invention applies vibration to the molten metal filled in the cavity of the lower mold by the vibrating part installed on the bottom of the bolster, thereby preventing the occurrence of pore trapping and forming complex shapes. It has excellent formability, and even if there is a temperature deviation of the molten metal, it has the effect of manufacturing a high-reactive forged product with improved quality and physical properties.

1 is a cross-sectional view schematically showing a reaction solid forging device with improved fillability, which is an embodiment of the present invention;
2 is a cross-sectional view schematically showing a state in which an insulating plate is provided between a bolster and an example vibrating unit;
3 is a cross-sectional view schematically showing another example of the vibrating unit;
4 is a cross-sectional view schematically showing a state in which an insulating plate is provided between the bolster and the vibrating unit of another example.

Hereinafter, preferred embodiments of the present invention will be described in more detail based on the accompanying drawings. Of course, the scope of the present invention is not limited to the following examples, and various modifications may be made by those of ordinary skill in the art without departing from the technical gist of the present invention.

1 is a cross-sectional view schematically showing an apparatus for forging a reactor with improved fillability, which is an embodiment of the present invention.

As shown in FIG. 1 , the reaction solid forging apparatus with improved fillability according to an embodiment of the present invention largely includes a bolster 10 , a lower mold part 20 , an upper mold part 40 , and a vibrating part 50 .

First, the lower mold portion 20 may be fixedly installed on the upper portion of the bolster 10 .

Next, the lower mold portion 20 may be configured to include a lower plate 210 and a lower mold 220 .

The lower plate 210 may be seated and fixed to the upper portion of the bolster 10 in various ways, such as bolt fixing.

The lower mold 220 may be disposed on the lower plate 210 so as to be elevated by a knock-out cylinder (not shown) inside the center of the lower plate 210 .

The lower mold part 20 may further include a side mold 230 and a side holder 240 .

A lower portion of the side mold 230 may be shaft-fixed to an outer end of the lower mold 220 .

Molten metal may be filled in the cavity 231 formed inside the side mold 230 .

The side holder 240 may be seated and fixed on the upper portion of the lower plate 210 so that the side mold 240 is positioned inside the side holder 240 to support the side mold 230 .

Next, the upper mold part 30 may include an upper plate 310 , an upper mold 320 , and a main cylinder (not shown).

The upper plate 310 may be disposed above the lower mold portion 20 at a predetermined height.

The upper mold 320 may be fixedly installed to the lower portion of the upper plate 310 in various ways, such as fixing bolts.

The main cylinder (not shown) may lower the upper plate 310 to pressurize the molten metal filled in the cavity 231 in the upper direction of the lower mold 220 by the upper mold 320 .

Since the lower mold part 20 and the upper mold part 30 are known through Korea Patent Publication No. 10-0403568, detailed descriptions thereof will be omitted below.

Next, the vibrating unit 40 is installed in the bolster 10 of the reaction high forging device with improved fillability according to the present invention and vibrates the molten metal filled in the cavity 231 in the upper direction of the lower mold 220 . will be put

In order for the vibrating part 40 to easily apply vibration to the molten metal filled in the cavity 231 in the upper direction of the lower mold 220, the vibrating part 40 is the bolster as shown in FIG. It can be fixedly installed in various ways, such as bolting to the bottom of (10).

In particular, the vibrating unit 40 is, for example, fixedly installed on one side of the bottom surface and the other side of the bottom surface of the bolster 10 to easily vibrate the molten metal filled in the cavity 231 in the upper direction of the lower mold 220 . can be added

The vibrating unit 40 is made of a rotary vibrator using the rotation principle of a motor, such as an electric motor, or a vertical linear vibrator that obtains vibration force by vibrating the vibrator vertically and vertically, or generates vibration through horizontal reciprocating motion of a mass. It can be made of various types, such as a horizontal vibrator.

Cavity 231 in the upper direction of the lower mold 220 by the vibrating part 40 that can be fixedly installed on one side of the bottom and the other side of the bottom of the bolster 10 of the reactive high forging device with improved fillability according to the present invention ) by applying vibration to the molten metal filled in the inside, it is possible to more easily prevent the occurrence of pore trapping, as well as to form complex shapes easily, resulting in very excellent formability.

In addition, by applying vibration to the molten metal filled in the cavity 231 in the upper direction of the lower mold 220 by the vibrating unit 40, the flowability of the molten metal is greatly improved even if a temperature deviation occurs in the molten metal Therefore, it is possible to manufacture reactive high-forged products with improved quality and physical properties, as well as greatly improve releasability.

2 is a cross-sectional view schematically illustrating a state in which an insulating plate is provided between a bolster and an example vibrating unit.

Next, when the temperature of the molten metal of the reactive high forging device with improved fillability according to the present invention rises to 400° C. or higher, the vertical linear vibrator and horizontal vibrator or rotary vibrator capable of forming the vibrating unit 40 are electrically operated There is a problem in that durability of a motor such as a motor may be deteriorated.

In order to easily prevent the durability of the vibrating unit 40 from being deteriorated due to the temperature of the molten metal rising to a high temperature of 400° C. or higher, the upper part of the vibrating unit 40 and the bolster ( Between the bottom surfaces of 10), a heat insulating plate 60 that can be fixed to the bolster 10 together with the vibrating unit 40 in various ways, such as bolting, may be provided.

3 is a cross-sectional view schematically showing another example of the vibrating unit.

Next, the vibrating part 40 prevents pore trapping with higher efficiency through the vibration applied to the molten metal filled in the cavity 231 in the upper direction of the lower mold 220 to form complex shapes more easily. In addition, in order to further improve the flowability of the molten metal in which the temperature deviation occurs, to further improve the quality and physical properties of the reactive high-forged molded product and the releasability, the filling property of the present invention is improved. As another example, the vibrating unit 40 of the reaction solid forging device may include a first vibrating unit 410 and a second vibrating unit 420 as shown in FIG. 3 .

The first vibrating unit 410 may be fixedly installed on the bottom surface of the bolster 10 in various ways, such as by fixing bolts, to apply vibration in the horizontal direction.

The second vibrating unit 420 may be fixedly installed on one side and the other side of the bolster 10 in various ways such as bolting, respectively, to apply vibration in the vertical direction.

4 is a cross-sectional view schematically illustrating a state in which an insulating plate is provided between the bolster and the vibrating unit of another example.

As shown in FIG. 4 , the insulating plate 60 is disposed between the upper portion of the first vibrating unit 410 of the vibrating unit 40 of another example and the bottom surface of the bolster 10 and the first vibrating unit 410 and It can be fixed in various ways, such as bolting together.

In addition, between the side of the second vibrating unit 420 of the vibrating unit 40 of another example and the side of the bolster 10, the insulating plate 60 is bolted together with the second vibrating unit 420, etc. It can be fixed in a variety of ways.

Meanwhile, the second vibrating unit 420 may be fixedly installed on the bottom surface of the bolster 10, and the first vibrating unit 410 may be fixedly installed on one side and the other side of the bolster 10, respectively. is of course

10; Bolster, 20; lower part,
30; upper part, 40; vibrating part.

Claims (4)

with bolsters;
a lower mold portion including a lower plate fixedly installed on the bolster, and a lower mold disposed on the lower plate and filled with molten metal in the cavity;
An upper plate disposed on the upper side of the lower mold part, an upper mold fixedly installed at the lower part of the upper plate, and a main cylinder for lowering the upper plate to pressurize the molten metal filled in the cavity of the lower mold by the upper mold. an upper body including;
and a vibrating unit installed in the bolster to apply vibration to the molten metal filled in the lower mold.
The method of claim 1,
and the vibrating unit is installed on the bottom of the bolster.
The method of claim 1,
The vibrating unit comprises a first vibrating unit installed on the bottom of the bolster to apply vibration in the horizontal direction, and a second vibrating unit installed to the side of the bolster to apply vibration in the vertical direction. forging device.
The method of claim 1,
A reactive high forging device with improved filling, characterized in that a heat-insulating plate made of a high heat-resistant plastic material is provided between the bolster and the vibrating unit.

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