KR20040012422A - An electrode production method for a coating wire - Google Patents

An electrode production method for a coating wire Download PDF

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KR20040012422A
KR20040012422A KR1020020075090A KR20020075090A KR20040012422A KR 20040012422 A KR20040012422 A KR 20040012422A KR 1020020075090 A KR1020020075090 A KR 1020020075090A KR 20020075090 A KR20020075090 A KR 20020075090A KR 20040012422 A KR20040012422 A KR 20040012422A
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brass
wire
zinc
electrode
electrode wire
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KR1020020075090A
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Korean (ko)
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KR100460699B1 (en
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최병일
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최병일
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23HWORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H7/00Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
    • B23H7/02Wire-cutting
    • B23H7/08Wire electrodes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23HWORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H1/00Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric
    • B23H1/04Electrodes specially adapted therefor or their manufacture
    • B23H1/06Electrode material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23HWORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
    • B23H7/00Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
    • B23H7/22Electrodes specially adapted therefor or their manufacture
    • B23H7/24Electrode material

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

PURPOSE: A method for manufacturing an electrode line for a coating wire is provide to perform the brass electroplating around a brass line and the zinc electroplating thereon to overcome the drawing limit of the brass line. CONSTITUTION: A method for manufacturing an electrode line for a coating wire is composed of steps of: manufacturing a brass lot as central materials in a certain dimension(S1¯S4); rinsing, cleansing and drying the brass line(S5); electrically plating the brass line with brass(S6); drawing an electrode line as a final product with an automatic drawing unit and rinsing, cleansing, and drying the electrode line(S7,S8); electrically plating the brass electrode line with zinc(S9); and heat processing the zinc-plate electrode line with radiant heat(S10).

Description

코팅 와이어용 전극선 제조방법{An electrode production method for a coating wire}An electrode production method for a coating wire

본 발명은 코팅 와이어용 전극선 제조방법에 관한 것으로, 특히 완제품인 황동선 전극선에 아연전기도금을 실시하여 인발 공정을 생략함으로써 아연과 황동의신장율차에 의한 전극선 표면의 스크래치 또는 세선(細線)중의 크랙의 발생을 방지할 수 있도록 하고, 아연 도금된 전극선을 열매체유의 가열에 의한 복사열로 열처리함으로써 방전 가공시 전극선의 단락을 방지하고 전류의 흐름을 일정하게 유지할 수 있도록 한 코팅 와이어용 전극선 제조방법에 관한 것이다.The present invention relates to a method for producing an electrode wire for coating wire, and in particular, a zinc electroplating is performed on the finished brass wire electrode wire to omit a drawing process, so that the cracks on the surface of scratches or thin wires on the electrode wire surface due to the difference in elongation of zinc and brass are eliminated. The present invention relates to a method for manufacturing an electrode wire for a coating wire, which can prevent the occurrence of heat, and heat-treat the galvanized electrode wire with radiant heat by heating the heat medium oil to prevent short circuit of the electrode wire during discharge processing and to maintain a constant current flow. .

일반적으로 와이어 방전가공은 수중에서 황동세선의 와이어 전극과 피삭물간의 방전으로 발생하는 열에너지를 이용하여 공작물을 절단가공하는 방법으로, 주로 복잡한 형상으로 절단 가공하려는 금형이나 기계부품 등의 제조에 사용되고 있다.In general, wire electric discharge machining is a method of cutting a workpiece by using thermal energy generated by electric discharge between a wire electrode of a brass fine wire and a workpiece in water, and is mainly used for manufacturing a mold or a mechanical part for cutting into a complicated shape. .

최근에는 금속은 물론 도전성이 있는 것이라면 다이아몬드, 초경합금, 세라믹스와 같이 난가공성 재료의 가공에도 정밀성이 높아서 확대 보급되고 있는 실정이다.Recently, if the metal is conductive as well as conductive, it is widely used due to its high precision in the processing of hard-processing materials such as diamond, cemented carbide, and ceramics.

현재 방전가공기 전극선으로 가장 많이 사용되고 있는 재료는 65%동(Cu)-35%, 아연(Zn)합금인 황동선이지만 특히 절삭속도를 요하는 경우에는 강철선이나 황동선의 표면에 아연(Zn)을 도금한 아연 도금선이 사용되고 있다.At present, the most widely used electrode wire for electric discharge machining is brass wire made of 65% copper (Cu) -35% and zinc (Zn) alloy, but especially when cutting speed is required, zinc (Zn) is plated on the surface of steel wire or brass wire. Galvanized wire is used.

지금까지 알려진 바에 의하면, 방전가공기 전극선 재료로서, 절삭속도를 좌우하는 요소는 선재의 합금성분 중에 아연(Zn)의 함량으로, 아연의 함량이 높을수록 선재의 제조에 어려움이 커서 일반 심재의 표면에 아연을 도금하여 사용하고 있다.It is known that the electrode of the electric discharge machine, the element that determines the cutting speed is the content of zinc (Zn) in the alloying material of the wire rod, the higher the zinc content is difficult to manufacture the wire rod, so that the surface of the core material Zinc is used by plating.

이는 방전시 발생되는 열이 증발하는 아연(Zn)과 함께 소모되기 때문이며, 합금중에 아연(Zn)의 함량이 높을수록 그 만큼 방열 효과도 큰 것으로 확인되고 있다.This is because heat generated during discharge is consumed with zinc (Zn) evaporating, and the higher the content of zinc (Zn) in the alloy, the greater the heat dissipation effect.

종래의 전극선 제조방법은 0.8∼1.0 m/m에서 아연도금을 한 후 확산 처리하여 자동 인발하는 공정이나, 아연과 황동은 그 신장율의 차이가 크므로 0.8m/m∼1.0m/m에서 완제품 치수인 0.2m/m, 0.25m/m, 0.3m/m등은 단면적의 감소율이 300∼500%이다.The conventional electrode wire manufacturing process is a process of automatic drawing by galvanizing after coating the zinc plating at 0.8 ~ 1.0 m / m, but the finished product dimensions from 0.8 m / m to 1.0 m / m because zinc and brass have a large difference in elongation Phosphorus 0.2m / m, 0.25m / m, 0.3m / m and the like have a reduction rate of 300 to 500%.

또한, 상기 종래의 공정에 의한 전극선은 접착성이 떨어지며, 아연과 황동의 신장율의 차이로 인하여 전극선의 표면에 크랙이 가고 세선중에 스크래치가 발생하여 양질의 전극선을 생산하기가 어려운 결점이 있다.In addition, the electrode wire by the conventional process is inferior in adhesiveness, due to the difference in the elongation of zinc and brass cracks on the surface of the electrode wire and scratches occur in the fine wire it is difficult to produce a good electrode wire.

본 발명은 상기와 같은 종래의 문제점들을 해결하기 위한 것으로, 본 발명의 목적은, 0.20m/m, 0.25m/m, 0.30m/m 등의 최종제품인 황동 전극선에 알카리계 아연도금액을 사용하여 아연 코팅을 함으로써 인발공정을 생략할 수 있어 아연과 황동의 신장율차에 의한 전극선 표면의 스크래치 또는 크랙의 발생을 방지할 수 있도록 하는 코팅 와이어용 전극선 제조방법을 제공하는데 있다.The present invention is to solve the conventional problems as described above, an object of the present invention, by using an alkaline zinc plating solution in the brass electrode wire of the final product, such as 0.20m / m, 0.25m / m, 0.30m / m The zinc coating can be omitted to provide a method for producing an electrode wire for the coating wire to prevent the occurrence of scratches or cracks on the surface of the electrode wire due to the difference in elongation of zinc and brass.

본 발명의 다른 목적은, 상기 아연도금된 전극선을 열매체유에 의한 복사열로 열처리함으로써 경화된 아연코팅 전극선을 연화하고 아연코팅 금속조직을 안정화시키며 방전 가공시 전극선의 단락을 방지하고 전류의 흐름을 일정하게 유지할 수 있도록 하는 코팅 와이어용 전극선 제조방법을 제공하는데 있다.Another object of the present invention is to heat the zinc-plated electrode wires by radiant heat by heat medium oil to soften the hardened zinc-coated electrode wires, stabilize the zinc-coated metal structure, prevent short-circuit of the electrode wires during electric discharge machining, and maintain a constant current flow. It is to provide an electrode wire manufacturing method for a coating wire to be maintained.

도 1은 본 발명에 따른 코팅 와이어용 전극선 제조방법의 동작 흐름도1 is an operation flowchart of a method for manufacturing electrode wire for coating wire according to the present invention.

도 2는 본 발명 전기 도금조의 평면도2 is a plan view of the present invention electroplating bath

도 3은 본 발명 전기 도금조의 측면도3 is a side view of the present invention electroplating bath

도 4는 본 발명 열매체유에 의한 복사열 처리장치의 사시도Figure 4 is a perspective view of the radiant heat treatment apparatus according to the present invention heat medium oil

〈도면의 주요부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>

1,4,12,13:보빈 3:전기 도금조1,4,12,13: bobbin 3: electroplating bath

2:황동 전극선 5:아연 도금액2: brass electrode wire 5: zinc plating solution

6:열처리장치 7:열매체유6: heat treatment device 7: heat medium oil

8:관통공 9,10:전기히타8: Through-hole 9, 10: Electric Heater

11:투입구11: entrance

본 발명은 심재인 5m/m의 황동롯드를 0.8∼1.0m/m 치수로 제조하는 제1공정과, 0.9m/m의 황동선을 세정, 세척 및 건조시키는 제2공정과, 상기 0.9m/m의 황동선에 아연 65%, 동 35%이하의 99.9%의 황동괴를 통해 황동전기도금을 실시하는 제3공정과, 자동 인발기로 완제품 치수의 전극선을 생산하여 세정, 세척 및 건조시키는 제4공정과, 상기 제4공정을 거친 완제품의 황동선 전극선을 아연전기도금조를 통하여 피막 두께가 5∼8미크론이 되도록 아연 전기 도금을 실시하는 제5공정과, 상기 아연도금된 전극선을 열매체유의 가열에 의한 복사열로 열처리하는 제6공정으로 이루어짐을 특징으로 한다.The present invention is a first step of manufacturing a 5 m / m brass rod of 0.8 ~ 1.0 m / m in the core material, a second step of cleaning, washing and drying the 0.9 m / m brass wire, and the 0.9 m / m The third process of electroplating brass through brass ingot of 65% zinc and less than 99.9% of copper in brass wire, and the fourth process of producing, cleaning, washing and drying electrode wire of finished product size by automatic drawing machine; A fifth step of performing zinc electroplating of the finished brass wire electrode wire of the finished product through the zinc electroplating bath to have a thickness of 5 to 8 microns, and the galvanized electrode wire to radiant heat by heating the heat medium oil. Characterized in that the sixth step of heat treatment.

본 발명은 상기 아연전기도금조의 아연도금액으로 접착강도가 우수한 알카리계 아연 도금액을 사용하는 것을 특징으로 한다.The present invention is characterized by using an alkaline zinc plating solution having excellent adhesive strength as the zinc plating solution of the zinc electroplating bath.

이하, 본 발명의 실시 예를 첨부도면 도 1내지 도 3을 참고로 하여 상세히 설명하면 다음과 같다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 1 to 3.

본 발명에 따른 전극선 제조 방법은, 먼저, 심재인 황동롯드 5m/m를 준비하여 인발 및 열처리 공정을 거친 후 다시 인발하여 0.8∼1.0m/m의 황동선으로 제조한다(S1∼S4).In the electrode wire manufacturing method according to the present invention, first, the brass rod 5m / m of the core material is prepared and drawn again after the drawing and heat treatment process to produce a brass wire of 0.8 ~ 1.0m / m (S1 ~ S4).

여기서, 상기 황동롯드는 동함량 60∼65%, 아연함량 35∼40%의 심재인 황동을 사용한다.Here, the brass rod is used as the core material of the copper content of 60 to 65%, zinc content of 35 to 40%.

이렇게 제조된 0.9m/m의 황동선을 열처리 및 세척하고 건조시킨다(S5).Thus produced 0.9m / m brass wire is heat treated, washed and dried (S5).

상기 0.9m/m의 황동선에, 아연 65%, 동 35% 이하의 99.9%의 황동괴를 통해 황동전기도금을 실시한다(S6).Brass electroplating is carried out to the brass wire of 0.9m / m through 99.9% brass ingot of zinc 65%, copper 35% or less (S6).

즉, 상기 0.9m/m의 황동선을 전기도금할 경우, 이 0.9m/m의 황동선 일측에는 통상의 (-)단자를 접촉시키고, 0.9m/m의 황동선 타측에는 (+)단자 즉, 아연 65%,동 35% 이하의 99.9%의 황동괴를 접촉시킴으로써 상기 0.9m/m의 황동선 둘레에 2미크론 이상의 황동전기도금이 다시 피막되는 것이다.That is, in the case of electroplating the 0.9 m / m brass wire, one side of the 0.9 m / m brass wire is brought into contact with a normal (-) terminal, and the other side of the 0.9 m / m brass wire has a positive (+) terminal, that is, zinc 65 By contacting the 99.9% brass ingot of 35% or less, copper electroplating of 2 microns or more is recoated around the 0.9 m / m brass wire.

이와 같이 0.9m/m의 황동선 둘레에 2미크론 이상의 황동전기도금이 이루어지면 황동선의 인발한계를 극복할 수 있음은 물론 방전 가공시 선속을 증대할 수 있는 장점을 갖게 된다.As such, if the electroplating of 2 microns or more is made around the brass wire of 0.9 m / m, it is possible to overcome the drawing limit of the brass wire, as well as to increase the flux during the discharge machining.

상기와 같이 0.9m/m의 황동선 둘레에 2미크론 이상의 황동전기도금이 이루어진 상태에서 자동 인발기를 통해 0.20m/m, 0.25m/m, 0.30m/m 등의 완제품 치수의 전극선을 생산한 후 황동선 전극선을 세정, 세척, 건조시킨다(S8).Brass wire after producing finished electrode dimensions such as 0.20m / m, 0.25m / m, 0.30m / m through automatic drawing machine in the state of brass electroplating of 2 micron or more around 0.9m / m brass wire as above The electrode wire is washed, washed and dried (S8).

그리고 도 2와 도 3에 도시된 바와 같은 전기도금조(3)를 통하여 황동선 전극선(2)에 아연 전기 도금을 시행하는데, 이때 아연 도금층의 피막 두께는 5∼8 미크론을 유지하는 것이 바람직하다.In addition, zinc electroplating is performed on the brass wire electrode wire 2 through the electroplating bath 3 as shown in FIGS. 2 and 3, wherein the thickness of the zinc plating layer is preferably maintained at 5 to 8 microns.

이때, 상기 완제품인 황동선 전극선(2)에 아연을 도금하는 방법은 도시된 바와 같이, 보빈(1)에 감겨 있는 황동 전극선(2)이 풀리면서 아연 전기 도금조(3)속을 통과함으로써 전기도금조(3)속에 넣어진 아연 도금액(5)에 의해 아연도금이 이루어지며, 이후 보빈(4)을 통하여 아연도금된 황동선 전극선(2)을 다시 감아주는 일련의 공정을 통하여 아연 도금이 이루어지게 된다(S9).At this time, the method for plating zinc on the finished brass wire electrode wire (2), as shown, the electroplating by passing through the zinc electroplating bath (3) while the brass electrode wire (2) wound on the bobbin (1) is released Zinc plating is performed by the zinc plating solution 5 placed in the bath 3, and then zinc plating is performed through a series of processes of rewinding the galvanized brass wire electrode 2 through the bobbin 4. (S9).

여기서, 상기 아연도금액(5)으로는, 접착 강도가 우수한 알카리계 아연 도금액을 사용하는 것이 바람직하다.Here, as the zinc plating solution 5, it is preferable to use an alkaline zinc plating solution having excellent adhesive strength.

본 발명은 상기와 같이 아연전기 도금이 이루어진 상태에서 아연 도금된 전극선을 열매체유의 가열에 의해 열처리한다(S10).The present invention heat-treated the zinc-plated electrode wire by heating the heat medium oil in the state of the zinc electroplating as described above (S10).

도 4는 상기 아연도금이 이루어진 전극선(20)을 열매체유(7)의 가열에 의한 복사열로 열처리하는 공정을 나타낸 것으로, 열처리장치(6)내에는 중심부에 관통공(8)이 형성되고, 이 관통공(8) 주위에는 상방의 주입구(11)를 통하여 주입된 열매체유(7)가 위치되도록 이루어져 있으며, 상기 열매체유(7)에는 전기 히타(9)(10)를 통하여 전원을 인가할 수 있도록 이루어져 있다.4 shows a process of heat-treating the electrode wire 20 made of zinc plating by radiant heat by heating of the heat medium oil 7, wherein a through hole 8 is formed in the center of the heat treatment apparatus 6. The heat medium oil 7 injected through the upper injection hole 11 is positioned around the through hole 8, and power is supplied to the heat medium oil 7 through electric heaters 9 and 10. It consists of.

따라서, 열처리장치(6) 상방에 형성된 주입구(11)를 통하여 열매체유(7)를 넣고 전기 히타(9)(10)를 통하여 전원을 인가하면 열매체유(7)가 최고 200℃ 까지 가열되는 것으로, 이와 같은 상태에서 아연도금된 전극선(20)을 관통공(8)을 통하여 통과시키면 열처리장치(6)내의 열매체유(7)의 복사열에 의하여 전극선(20)이 열처리되어 아연도금공정에서 경화된 전극선(20)이 연화됨과 함께 아연도금된 전극선(20)의 안정화를 이룰 수 있게 되는 것이다.Therefore, when the heat medium oil 7 is inserted through the injection hole 11 formed above the heat treatment device 6 and power is applied through the electric heaters 9 and 10, the heat medium oil 7 is heated up to 200 ° C. In this state, when the galvanized electrode wire 20 passes through the through hole 8, the electrode wire 20 is heat-treated by the radiant heat of the heat medium oil 7 in the heat treatment apparatus 6, and then hardened in the galvanizing process. The electrode wire 20 is softened and the galvanized electrode wire 20 can be stabilized.

이상에서 상세히 설명한 바와 같은 본 발명은 0.9m/m의 황동선 둘레에 2미크론 이상의 황동전기도금을 실시하고 다시 그 위에 아연 전기도금을 실시함으로써 황동선의 인발한계를 극복할 수 있음은 물론 방전 가공시 선속을 증대할 수 있다.As described in detail above, the present invention can overcome the drawing limit of brass wire by conducting a brass electroplating of 2 microns or more around a brass wire of 0.9 m / m and performing zinc electroplating thereon, as well as a line speed during electric discharge machining. Can be increased.

또한, 본 발명은 최종 제품인 황동 전극선에서 아연 코팅을 함으로써 인발공정을 생략할 수 있어 심재인 황동전극선과 코팅재인 아연의 접착 강도를 극대화할 수 있으며, 인발 공정의 생략으로 황동과 아연의 신장율차에 의한 전극선 표면의 스크래치 또는 세선중 크랙의 발생을 방지할 수 있는 효과가 있다.In addition, the present invention can omit the drawing process by zinc coating in the brass electrode wire which is the final product can maximize the adhesive strength of the brass electrode wire of the core material and the zinc coating material, and omission of the drawing process due to the difference in elongation of brass and zinc There is an effect that can prevent scratches on the surface of the electrode wire or crack generation in the thin wire.

또한, 본 발명은 상기 아연도금된 전극선을 열매체유의 가열에 의한 복사열로 열처리함으로써 경화된 아연코팅 전극선을 연화하고 아연코팅 금속조직을 안정화시키며 방전 가공시 전극선의 단락을 방지하고 전류의 흐름을 일정하게 유지할 수 있는 효과도 있다.In addition, the present invention by heat-treating the zinc-plated electrode wire with radiant heat by heating the heat medium oil softens the hardened zinc-coated electrode wire, stabilizes the zinc-coated metal structure, prevents short circuit of the electrode wire during electrical discharge machining and maintains a constant flow of current. There is also a sustainable effect.

Claims (1)

심재인 5m/m의 황동롯드를 0.8∼1.0m/m 치수로 제조하는 제1공정과,A first step of manufacturing a 5 m / m brass rod with a core dimension of 0.8 to 1.0 m / m, 상기 제1공정에 의해 제조된 0.9m/m의 황동선을 세정, 세척 및 건조시키는 제2공정과,A second step of washing, washing and drying the brass wire of 0.9 m / m manufactured by the first step; 상기 0.9m/m의 황동선에 아연 65%, 동 35%이하의 99.9%의 황동괴를 통해 황동전기도금을 실시하는 제3공정과,A third step of performing brass electroplating through the brass ingot of 65% zinc and less than 99.9% of copper in the 0.9 m / m brass wire, 자동 인발기로 완제품 치수의 전극선을 생산하여 세정, 세력 및 건조시키는 제4공정과,A fourth step of producing, cleaning, forcing and drying the electrode wire of the finished product size by the automatic drawing machine; 상기 제4공정을 거친 완제품의 황동선 전극선을 알카리계 아연도금액을 사용한 아연전기도금조를 통하여 피막 두께가 5∼8미크론이 되도록 아연 전기 도금하는 제5공정과,A fifth step of galvanizing the brass wire electrode wire of the finished product having undergone the fourth process to a film thickness of 5 to 8 microns through a zinc electroplating bath using an alkaline zinc plating solution; 상기 아연도금된 전극선을 열매체유의 가열에 의한 복사열로 열처리하는 제6공정으로 이루어지는 것을 특징으로 하는 코팅 와이어용 전극선 제조방법.And a sixth step of heat-treating the galvanized electrode wire with radiant heat by heating the heat medium oil.
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