KR20060016434A - Apparatus for removing for bubble containing liquid metal - Google Patents

Apparatus for removing for bubble containing liquid metal Download PDF

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Publication number
KR20060016434A
KR20060016434A KR1020040064863A KR20040064863A KR20060016434A KR 20060016434 A KR20060016434 A KR 20060016434A KR 1020040064863 A KR1020040064863 A KR 1020040064863A KR 20040064863 A KR20040064863 A KR 20040064863A KR 20060016434 A KR20060016434 A KR 20060016434A
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South Korea
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molten metal
crucible
vibration generator
die casting
ultrasonic vibration
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KR1020040064863A
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Korean (ko)
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안평수
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현대모비스 주식회사
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Priority to KR1020040064863A priority Critical patent/KR20060016434A/en
Publication of KR20060016434A publication Critical patent/KR20060016434A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/15—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/10—Supplying or treating molten metal
    • B22D11/11—Treating the molten metal
    • B22D11/114—Treating the molten metal by using agitating or vibrating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/18—Controlling or regulating processes or operations for pouring
    • B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
    • B22D11/186—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level by using electric, magnetic, sonic or ultrasonic means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/28—Melting pots
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/08—Shaking, vibrating, or turning of moulds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F04D17/168—Pumps specially adapted to produce a vacuum

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

발명은 용탕의 기포제거장치에 관한 것으로, 용탕(2)이 담겨진 도가니(1)의 내부공간을 진공으로 만들어주기 위해 작동되는 진공펌프(10)와, 초음파 진동을 발생시키는 초음파 진동발생기(20)와, 상기 초음파 진동발생기(20)로 전원을 공급하는 전원공급부(30)와, 상기 초음파 진동발생기(20)로부터 진동을 받아 진폭을 증폭시키면서 도가니(1)내에 담겨진 용탕(2)으로 기계적 충격을 가하도록 하는 초음파 진동자(40)로 구성되어져, 진공 다이캐스팅 및 무공성 다이캐스팅 작업을 수행하기 전에 도가니내에 담겨진 용탕속에 존재하는 기포를 먼저 제거한 후 제품을 생산하게 됨으로써, 생산된 제품은 우수한 품질을 갖출 수 있도록 된 것이다.The present invention relates to a bubble removing device of the molten metal, the vacuum pump 10 is operated to make the internal space of the crucible (1) in which the molten metal (2) is vacuumed, and the ultrasonic vibration generator 20 for generating ultrasonic vibrations And a mechanical impact by the power supply unit 30 supplying power to the ultrasonic vibration generator 20 and the molten metal 2 contained in the crucible 1 while amplifying the amplitude by receiving the vibration from the ultrasonic vibration generator 20. Consists of an ultrasonic vibrator 40 to apply, by removing the bubbles present in the molten metal contained in the crucible before the vacuum die casting and non-porous die casting operation to produce the product, the produced product can be equipped with excellent quality It is.

Description

용탕의 기포제거장치{apparatus for removing for bubble containing liquid metal}Apparatus for removing for bubble containing liquid metal}

도 1은 종래 구조에 따른 용탕의 기포제거장치를 설명하기 위한 개략적인 구성도,1 is a schematic configuration diagram for explaining a bubble removing device of the melt according to the conventional structure

도 2는 본 발명에 따른 용탕의 기포제거장치를 설명하기 위한 개략적인 구성도이다.Figure 2 is a schematic configuration diagram for explaining the bubble removing apparatus of the molten metal according to the present invention.

< 도면의 주요 부분에 대한 부호의 설명 ><Description of Symbols for Main Parts of Drawings>

1 - 도가니 2 - 용탕1-Crucible 2-Melt

3 - 기포 10 - 진공펌프3-Bubble 10-Vacuum Pump

20 - 초음파 진동발생기 30 - 전원공급부20-Ultrasonic Vibration Generator 30-Power Supply

40 - 초음파 진동자40-ultrasonic vibrator

본 발명은 다이캐스팅 금형의 캐비티로 용탕을 주입하기 전에 용탕속에 포함된 기포를 완전히 제거할 수 있도록 하는 용탕의 기포제거장치에 관한 것이다.The present invention relates to an apparatus for removing bubbles in a molten metal so as to completely remove bubbles contained in the molten metal before injecting the molten metal into a cavity of a die casting mold.

일반적으로, 단조법은 소재를 압축 가공함으로써 주조조직 내의 유해한 결함을 압착하여 기계적 성질을 개선하는 동시에 목적하는 형상의 제품을 제조하는 방 법으로서, 특히 알루미늄 합금 단조품은 비강도가 크고 연성, 인성, 피로강도 및 내식성 등도 우수하므로 주로 항공기 부품에 사용되어 왔으나 최근에는 연비 향상을 위한 경량화 소재로 주목되면서 항공기 뿐만이 아니라 자동차, 선박, 일반기계 등의 주요 부품에 널리 사용되고 있는 실정이며, 철강 단조품 및 주철제품에 비해 약 50%의 경량화를 이룰 수 있다.In general, the forging method is a method of compressing the material to compress the harmful defects in the casting structure to improve the mechanical properties and at the same time to produce a product of the desired shape, in particular aluminum alloy forgings have a high specific strength, ductility, toughness, It has been used mainly for aircraft parts because of its excellent fatigue strength and corrosion resistance, but recently it has been used as a lightweight material for improving fuel efficiency, and is widely used for major parts such as automobiles, ships, general machinery, etc. Compared to about 50% light weight can be achieved.

통상적인 알루미늄 단조품의 제조방법으로서, 알루미늄 주조제를 균질화 처리한 후 압출한 소재 또는 알루미늄 연속주조제를 열간 단조함으로써 성품을 얻는데, 이러한 방법은 고신뢰성을 가진 제품을 얻을 수 있는 반면, 원소재로부터 마무리된 최종 단조품 완성까지의 공정수가 많고, 고가의 설비를 투자하여야 함은 물론, 형상에 있어서도 단순한 형상으로만 제한되는 등 생산성이 낮고, 제조비용이 높아 제품 경쟁력이 매우 낮은 문제점이 있게 된다.As a conventional method for producing aluminum forgings, a product is obtained by homogenizing an aluminum casting agent and then hot forging an extruded material or an aluminum continuous casting agent. While this method can obtain a product having high reliability, The number of processes to finish the finished forging finished, and the expensive equipment must be invested, of course, the shape is limited to a simple shape, such as low productivity, high manufacturing cost, there is a problem that the product competitiveness is very low.

이에 따라, 상기 단조법의 단점을 보완하고자 다이캐스팅(dai casting)에 의해 각종 공업제품 및 자동차 부품을 제조하는 시도가 이루어지고 있는 바, 상기 다이캐스팅은 용융 금속을 고온상태에서 고압으로 압입하여 표면이 고정밀도를 가지는 주물을 단시간 내에 대량으로 생산할 수 있는 고압주조법으로서 기계자동화율 및 생산성이 높은 장점을 지닌다.Accordingly, attempts have been made to manufacture various industrial products and automobile parts by die casting in order to compensate for the shortcomings of the forging method. The die casting presses molten metal at high pressure under a high temperature to high-precision surfaces. It is a high pressure casting method that can produce large quantities of castings with a short time, and has the advantages of high mechanical automation rate and productivity.

그러나, 이러한 다이캐스팅은 뛰어난 생산성에 비해 주조조건에 따른 품질의 차이가 현격하기 때문에 알루미늄 합금에 대해서 적용하기에는 용이하지 않다는 문제점이 있다.However, such a die casting has a problem in that it is not easy to apply to an aluminum alloy because the difference in quality according to casting conditions is remarkable compared to the excellent productivity.

즉, 용탕이 고속 고압으로 충진되기 때문에 내부 함유 가스량의 과다로 인해 내압성이 떨어지고, 주물 형성부인 캐비티(cavity)보다 탕도부가 먼저 응고함으로써 주물의 두께가 가장 두꺼운 부위에 기공(氣孔)이나 수축공을 발생시킨다.That is, since the molten metal is filled at a high speed and high pressure, the pressure resistance is inferior due to the excessive amount of gas contained therein. Generates.

이러한 기공이나 수축공의 결함은 최종 성품의 강도를 저하시킬 뿐만 아니라 후속적인 열처리 및 용접 등의 장애 요인으로 작용한다.The defects of pores or shrinkage pores not only lower the strength of the final product but also act as obstacles such as subsequent heat treatment and welding.

다이캐스팅에 있어서 상기와 같은 기공 및 수축공을 제어하기 위한 다수의 방법들이 알려졌는데, 진공 다이캐스팅 및 무공성(無孔性) 다이캐스팅(Pore-free die casting) 등이 그 대표적인 예이다.Numerous methods are known for controlling such pores and shrinkage pores in die casting, with vacuum die casting and pore-free die casting being representative examples.

상기 진공 다이캐스팅은 다이캐스팅 금형내에 마련된 캐비티를 진공상태로 유지하여 공기의 혼입을 방지하는 방법이며, 상기 무공성 다이캐스팅은 용탕을 주입하기 전에 탕부에 활성가스인 산소를 취입함으로써 이 산소와 예컨대, 알루미늄과 같은 용탕을 서로 반응시켜 산화물 보호피막이 형성되도록 함으로써 공기의 혼입을 억제하여 기공이 없는 치밀한 주물을 얻는 방법이다.The vacuum die casting is a method of preventing the mixing of air by maintaining the cavity provided in the die casting mold in a vacuum state, and the non-porous die casting is by injecting oxygen, which is active gas into the hot water, before the injection of the molten metal, By forming the oxide protective film by reacting the same molten metal with each other, it is a method of suppressing the mixing of air to obtain a dense casting without pores.

그러나, 진공 다이캐스팅 및 무공성 다이캐스팅의 작업을 수행할 때에도 용탕내에 존재하는 기포를 제거하지 못하게 되면 생산된 제품이 취성(brittleness)을 갖게 됨으로써, 불량품이 생산되는 문제점이 있게 된다.However, even when performing the operation of vacuum die casting and non-porous die casting, if the bubbles present in the molten metal cannot be removed, the produced product may have brittleness, thereby causing a problem in that defective products are produced.

이에 따라, 다이캐스팅 금형내에 마련된 캐비티로 용탕을 주입하기 전에 도가니(용탕이 담긴 용기를 뜻함)내에 담겨진 용탕속의 기포를 미리 제거한 후, 상기 캐비티로 용탕을 주입하는 방법을 사용하기도 한다.Accordingly, a method of injecting molten metal into the cavity after removing bubbles in the molten metal contained in the crucible (the container containing the molten metal) before injecting the molten metal into the cavity provided in the die casting mold.

그 일례로서, 도 1에는 진공펌프(10)를 이용하여 도가니(1)내에 담겨진 용탕(2)속의 기포(3)를 제거하는 장치가 도시되어 있다.As an example, FIG. 1 shows an apparatus for removing bubbles 3 in the molten metal 2 contained in the crucible 1 using the vacuum pump 10.

그러나, 상기와 같이 진공펌프(10)를 사용하더라도 도가니(1)의 벽면에 붙어있는 기포(3)들은 표면장력에 때문에 쉽게 제거되지 못하는 문제점이 있게 되고, 또한 작업시간이 과다하게 소요됨으로써 생산성을 둔화시키게 되는 문제점이 있었다.However, even when the vacuum pump 10 is used as described above, bubbles 3 adhered to the wall surface of the crucible 1 are not easily removed due to the surface tension, and the work time is excessively consumed, thereby improving productivity. There was a problem that slowed down.

이에 본 발명은 상기와 같은 문제점을 해소하기 위해 안출된 것으로, 진공펌프와 함께 초음파 진동자를 함께 사용하여 도가니내에 담겨진 용탕속의 기포를 짧은 시간내에 완전히 제거할 수 있도록 하는 용탕의 기포제거장치를 제공함에 그 목적이 있다.Accordingly, the present invention has been made to solve the above problems, by using an ultrasonic vibrator together with a vacuum pump to provide a bubble removing apparatus of the molten metal to completely remove bubbles in the molten metal contained in the crucible in a short time. The purpose is.

상기와 같은 목적을 달성하기 위한 본 발명은, 용탕이 담겨진 도가니의 내부공간을 진공으로 만들어주기 위해 작동되는 진공펌프와, 초음파 진동을 발생시키는 초음파 진동발생기와, 상기 초음파 진동발생기로 전원을 공급하는 전원공급부와, 상기 초음파 진동발생기로부터 진동을 받아 진폭을 증폭시키면서 도가니내에 담겨진 용탕으로 기계적 충격을 가하도록 하는 초음파 진동자로 구성되는 것을 특징으로 한다.The present invention for achieving the above object, a vacuum pump that is operated to make the internal space of the crucible containing the melt into a vacuum, an ultrasonic vibration generator for generating ultrasonic vibration, and supplying power to the ultrasonic vibration generator It is characterized in that it comprises a power supply and an ultrasonic vibrator to apply a mechanical shock to the molten metal contained in the crucible while amplifying the amplitude received from the ultrasonic vibration generator.

이하 본 발명의 실시예를 첨부된 예시도면을 참조로 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명에 따른 용탕의 기포제거장치를 설명하기 위한 개략적인 구성도로서, 종래 구조와 동일한 부위에는 동일한 참조부호를 붙이면서 설명하기로 한다.Figure 2 is a schematic configuration diagram for explaining the bubble removing apparatus of the molten metal according to the present invention, will be described with the same reference numerals to the same parts as the conventional structure.

본 발명은 진공 다이캐스팅 및 무공성(無孔性) 다이캐스팅(Pore-free die casting) 작업을 수행하기 전에 도가니내에 담겨진 용탕속에 존재하는 기포를 먼저 제거하기 위한 장치에 관한 것이다.The present invention relates to an apparatus for first removing bubbles present in a molten metal contained in a crucible before performing vacuum die casting and pore-free die casting operations.

즉, 본 발명에 따른 용탕의 기포제거장치는 도 2에 도시된 바와 같이, 용탕(2)이 담겨진 도가니(1)의 내부공간을 진공으로 만들어주기 위해 작동되는 진공펌프(10)와, 초음파 진동을 발생시키는 초음파 진동발생기(20)와, 상기 초음파 진동발생기(20)로 전원을 공급하는 전원공급부(30)와, 상기 초음파 진동발생기(20)로부터 진동을 받아 진폭을 증폭시키면서 도가니(1)내에 담겨진 용탕(2)으로 기계적 충격을 가하도록 하는 초음파 진동자(40)로 구성된다.That is, the bubble removing apparatus of the molten metal according to the present invention, as shown in Figure 2, the vacuum pump 10 is operated to make the internal space of the crucible 1 in which the molten metal 2 is contained, and ultrasonic vibration Ultrasonic vibration generator 20 for generating a power source, a power supply unit 30 for supplying power to the ultrasonic vibration generator 20, and receives the vibration from the ultrasonic vibration generator 20 while amplifying the amplitude in the crucible (1) It consists of an ultrasonic vibrator 40 to apply a mechanical impact to the contained molten metal (2).

따라서, 초음파 진동발생기(20)가 구동되면 초음파 진동자(40)가 큰 진폭으로 작동을 하면서 도가니(1)내에 담겨진 용탕(2)에 기계적 충격을 가하게 된다.Therefore, when the ultrasonic vibration generator 20 is driven, the ultrasonic vibrator 40 operates at a large amplitude, thereby applying a mechanical shock to the molten metal 2 contained in the crucible 1.

이에 따라, 도가니(1)의 벽면에 표면장력을 가지고 붙어있던 기포(3)들은 도시된 바와 같이 도가니(1)의 벽면으로부터 떨어지게 되고, 또한 도가니(1)의 벽면으로부터 떨어진 기포(3)들은 주변의 다른 기포들과 합체되면서 그 크기가 커지게 된다.Accordingly, the bubbles 3 that are attached to the wall of the crucible 1 with the surface tension are separated from the wall of the crucible 1 as shown, and the bubbles 3 that are separated from the wall of the crucible 1 are surrounded by the surroundings. Its size increases as it merges with other bubbles in.

이와 같이, 용탕(2)내에 포함된 기포(3)들의 크기가 커지게 되면 부력이 증가하게 됨으로써, 상기 기포(3)들은 용탕(2)의 수면으로 쉽게 떠오르게 되는 바, 이때 용탕(2)의 수면으로 떠오른 기포(3)들은 진공펌프(10)의 작동에 의해 도가니(1)의 외부로 배출되어지고, 이로 인해 상기 도가니(1)의 내부는 완전한 진공상태를 유지할 수 있게 된다.As such, when the size of the bubbles 3 included in the molten metal 2 increases, buoyancy increases, so that the bubbles 3 easily float to the surface of the molten metal 2. Bubbles (3) floating on the water is discharged to the outside of the crucible (1) by the operation of the vacuum pump 10, thereby allowing the interior of the crucible (1) to maintain a complete vacuum.

이후, 기포(3)가 완전히 제거된 용탕(2)을 다이캐스팅 금형내에 마련된 캐비티로 주입하여 제품을 생산하게 되면, 생산된 제품은 우수한 품질을 갖출 수 있게 된다.Thereafter, when the molten metal 2 in which the bubbles 3 are completely removed is injected into a cavity provided in a die casting mold to produce a product, the produced product can have excellent quality.

또한, 본 발명은 진공펌프(10)와 초음파 진동기(40)를 함께 이용하여 도가니(1)내에 담겨진 용탕(2)속의 기포(3)를 제거하게 됨으로써, 진공펌프(10)만을 이용하여 기포(3)를 제거하던 종래에 비해 작업시간이 대폭 단축되는 잇점이 있게 되고, 더불어 생산성도 크게 증가되는 잇점이 있게 된다.In addition, the present invention is to remove the bubble (3) in the molten metal (2) contained in the crucible (1) by using the vacuum pump 10 and the ultrasonic vibrator 40 together, the bubble (using only the vacuum pump 10) Compared to the conventional method of removing 3), the work time is greatly shortened, and the productivity is also greatly increased.

이상 설명한 바와 같이 본 발명에 의하면, 진공 다이캐스팅 및 무공성 다이캐스팅 작업을 수행하기 전에 도가니내에 담겨진 용탕속에 존재하는 기포를 먼저 제거한 후 제품을 생산하게 됨으로써, 생산된 제품은 우수한 품질을 갖출 수 있게 되는 효과가 있게 된다.As described above, according to the present invention, before the vacuum die casting and the non-porous die casting operation, the bubbles existing in the crucible are first removed to produce a product, thereby producing an excellent quality product. Will be.

Claims (1)

용탕(2)이 담겨진 도가니(1)의 내부공간을 진공으로 만들어주기 위해 작동되는 진공펌프(10)와,A vacuum pump 10 which is operated to make the internal space of the crucible 1 containing the molten metal 2 into a vacuum, 초음파 진동을 발생시키는 초음파 진동발생기(20)와,An ultrasonic vibration generator 20 for generating ultrasonic vibrations, 상기 초음파 진동발생기(20)로 전원을 공급하는 전원공급부(30)와,A power supply unit 30 for supplying power to the ultrasonic vibration generator 20; 상기 초음파 진동발생기(20)로부터 진동을 받아 진폭을 증폭시키면서 도가니(1)내에 담겨진 용탕(2)으로 기계적 충격을 가하도록 하는 초음파 진동자(40)Ultrasonic vibrator 40 to receive a vibration from the ultrasonic vibration generator 20 to apply a mechanical impact to the molten metal (2) contained in the crucible (1) while amplifying the amplitude 로 구성되는 용탕의 기포제거장치.Bubble removing device of the molten metal.
KR1020040064863A 2004-08-17 2004-08-17 Apparatus for removing for bubble containing liquid metal KR20060016434A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102554195A (en) * 2011-12-31 2012-07-11 大连理工大学 Power ultrasonic device for treating high-temperature metal melt under vacuum state and method thereof
CN104190906A (en) * 2014-09-28 2014-12-10 哈尔滨工业大学 Contamination-free and high-efficient device for thinning titanium aluminum alloy
CN104259446A (en) * 2014-09-28 2015-01-07 哈尔滨工业大学 Pollution-free and efficient method for refining titanium-aluminum alloy
CN112756566A (en) * 2020-12-29 2021-05-07 广州普德机电设备有限公司 Aluminum alloy casting method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102554195A (en) * 2011-12-31 2012-07-11 大连理工大学 Power ultrasonic device for treating high-temperature metal melt under vacuum state and method thereof
CN104190906A (en) * 2014-09-28 2014-12-10 哈尔滨工业大学 Contamination-free and high-efficient device for thinning titanium aluminum alloy
CN104259446A (en) * 2014-09-28 2015-01-07 哈尔滨工业大学 Pollution-free and efficient method for refining titanium-aluminum alloy
CN112756566A (en) * 2020-12-29 2021-05-07 广州普德机电设备有限公司 Aluminum alloy casting method
CN112756566B (en) * 2020-12-29 2022-03-01 广州市美开实业有限责任公司 Aluminum alloy casting method

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