KR930000296B1 - Electric wire - Google Patents
Electric wire Download PDFInfo
- Publication number
- KR930000296B1 KR930000296B1 KR1019890020358A KR890020358A KR930000296B1 KR 930000296 B1 KR930000296 B1 KR 930000296B1 KR 1019890020358 A KR1019890020358 A KR 1019890020358A KR 890020358 A KR890020358 A KR 890020358A KR 930000296 B1 KR930000296 B1 KR 930000296B1
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- KR
- South Korea
- Prior art keywords
- wire
- electroding
- discharge machining
- addition
- electrode
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING 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
- B23H1/00—Electrical 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
- B23H1/04—Electrodes specially adapted therefor or their manufacture
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
Description
본 발명은 동예 Zn,Cr,Si를 함유시켜 방전가공 속도의 향상과 피가공물에 대한 전극선 성분의 부착량을 감소시킬 수 있도록 함을 목적으로 하는 와이어 방전가공용 전극선에 관한 것이다.The present invention relates to a wire discharge machining electrode wire for the purpose of containing Zn, Cr, and Si to improve the discharge machining speed and to reduce the adhesion amount of the electrode wire component to the workpiece.
와이어 방전가공이라 함은 방전 가공용 전극선(이하 전극선이라 한다)과 피가공물 사이에 전극선을 연속적으로 공급하면서 방전현상을 발생시키고 이 방전에 의하여 발생되는 열로써 피가공물을 용융 절단하는 것으로 특히 형상이 복잡하고 정밀해야 하는 피가공물 예를 들면 프레스 금형등의 가공에 많이 이용되고 있다.Wire discharge processing is a phenomenon in which a discharge phenomenon is generated while continuously supplying an electrode wire between an electrode wire for electric discharge machining (hereinafter referred to as an electrode wire) and a work piece, and the work to be melted and cut to cut the workpiece with heat generated by the discharge. It is widely used for the processing of workpieces to be precise and precise, for example, press dies.
상기한 방전 가공을 위하여 사용되는 종래의 전극선은 목적에 따라 다소 차이가 있으나, 대체로 직경이 0.03∼0.05mm 정도의 동선, 황동선등이 이용되고 있는 바, 이는 방전가공 속도와 피가공물의 가공면 정밀도등이 불충분하여 이의 개선이 요명되고 있는 실정이다.Conventional electrode wires used for the above-mentioned electric discharge machining are somewhat different depending on the purpose, but copper wires, brass wires, etc., which have a diameter of about 0.03 to 0.05 mm, are generally used. Insufficient backs are required to improve the situation.
대체적으로 방전가공 속도는 방전 가공기의 가공조건과, 전극선과 피가공물 사이의 방전상태를 조절하여 어느정도 빠르게할 수는 있지만, 가공속도를 빠르게 할 경우 단선이 발생되거나, 가공면이 거칠어지게 되는 문제점이 있었다.In general, the discharge machining speed can be increased to some extent by controlling the processing conditions of the electric discharge machine and the discharge state between the electrode wire and the workpiece. However, if the machining speed is increased, disconnection or roughening of the machining surface occurs. there was.
즉, 종래의 동선으로는 강도가 약해 단선이 쉽게되고 가공속도도 황동선보다 열등하게 되며 황동선은 가공속도가 동선보다 빠르지만, 피가공물의 표면이 동이나 아연성분이 많이 부착되어 표면 정밀도가 양호하게 되지 못하는 문제점이 있었다.In other words, the conventional copper wire is weak in strength, making it easier to disconnect, and the processing speed is inferior to that of brass wire, while the brass wire is faster than copper wire. There was a problem that could not be.
본 발명은 상기와 같은 제반 문제점을 감안하여 방전 가공속도를 향상시키면서 피가공물에 대한 전극선 성분의 부착량을 감소시킬수 있도록 안출한 것으로 이를 이하에서 상세히 설명하면 다음과 같다.The present invention has been devised to reduce the amount of adhesion of the electrode wire component to the workpiece while improving the discharge machining speed in view of the above-mentioned problems, which will be described in detail below.
본 발명은 Zn 30∼38wt%, Cr0.1∼0.8wt%, Si0.1∼0.3wt%와 나머지 부분이 본질적으로 Cu(Cu+불가피한 불순물)로 형성된 것이다.In the present invention, Zn 30 to 38 wt%, Cr 0.1 to 0.8 wt%, Si 0.1 to 0.3 wt% and the remainder are essentially formed of Cu (Cu + unavoidable impurities).
본 발명에서 Zn의 함유량을 30∼38wt%로 한 것은 30wt% 미만일 경우 그 효과가 적게되고 38wt%이상일 경우 전극선 제조시 가는선으로의 신선가공이 현저하게 곤란하기 때문이며, 또한, Cr을 첨가함에 따라 방전 가공속도가 향상되고 피가공물의 전극선 성분 부착량이 감소된다. 또 Si를 첨가하므로써 방전 가공시의 높은 온도에 견디는 고온강도를 향상시키며, 단신의 방지와, 전극선 제조시의 주조성, 열간 가공성을 향상시킬 수 있다.In the present invention, the Zn content of 30 to 38 wt% is less effective when less than 30 wt%, and when 38 wt% or more, it is very difficult to draw a thin wire in the production of electrode wires. The discharge machining speed is improved and the electrode wire component adhesion amount of the workpiece is reduced. In addition, the addition of Si improves the high temperature strength which withstands the high temperature at the time of electrical discharge machining, and prevents short-circuit, and improves the castability and hot workability at the time of electrode line production.
또한, 상기 Cr과 Si는 상기한 범위 즉, 0.1∼0.8wt%, 0.1∼0.3wt%내에서 가장 적정한 효과를 얻을수 있으며 Cu이외에 불가피한 불순물이 0.1wt%이하이면 상기한 효과에는 거의 관계가 없게 된다.In addition, the Cr and Si can obtain the most appropriate effect in the above-described range, that is, 0.1 to 0.8 wt%, 0.1 to 0.3 wt%, and if the unavoidable impurities other than Cu are 0.1 wt% or less, the above effects are almost irrelevant. .
[실시예]EXAMPLE
소형 용해로를 사용하여 흑연도가니에 Cu를 용해하고 탕면은 목탄으로 피복하며 Cr과 Si를 모합금한 상태로 첨가한 후, Zn을 첨가하여 표 1과 같은 조성의 주괴(직경 40mm, 길이 150mm)를 얻었다.Using a small melting furnace, dissolve Cu in the graphite crucible, coat the surface of the charcoal with charcoal, add Cr and Si in the state of master alloy, and add Zn to ingot (40mm in diameter, 150mm in length) as shown in Table 1. Got it.
다음에 이 주괴를 2mm면삭하고 850℃로 가열한후 금속 압출기로 열간 압출하여 직경 9mm의 롯드를 만들고 냉각신선과 소둔을 반복하여 직경 0.25mm의 전극선을 제조하였다. 이 전극선을 와이어 방전 가공기에 걸어 두께 36mm의 소재를 방전 가공하였다.Next, the ingot was cut into 2 mm and heated to 850 ° C., followed by hot extrusion with a metal extruder to make a rod having a diameter of 9 mm, and repeated cold drawing and annealing to prepare an electrode wire having a diameter of 0.25 mm. This electrode wire was hooked on a wire discharge machine to discharge-process a material having a thickness of 36 mm.
이때 방전 가공속도 및 피가공물에 대한 전극선 성분의 부착량을 측정하고 동시에 이의 비교를 위하여 종래의 전극선(동선 및 65/35황동선)도 동시에 조사하여 비교하였으며 동선의 방전 가공속도 및 전극선 성분 부착량을 100으로 하여 비교하였고 이의 비교표는 하기의 표 1과 같다.At this time, the discharge machining speed and the amount of adhesion of the electrode wire component to the workpiece were measured, and at the same time, the conventional electrode wires (copper wire and 65/35 brass wire) were also examined and compared. The comparison table is shown in Table 1 below.
[표 1]TABLE 1
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019890020358A KR930000296B1 (en) | 1989-12-30 | 1989-12-30 | Electric wire |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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KR1019890020358A KR930000296B1 (en) | 1989-12-30 | 1989-12-30 | Electric wire |
Publications (2)
Publication Number | Publication Date |
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KR910011379A KR910011379A (en) | 1991-08-07 |
KR930000296B1 true KR930000296B1 (en) | 1993-01-15 |
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KR1019890020358A KR930000296B1 (en) | 1989-12-30 | 1989-12-30 | Electric wire |
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1989
- 1989-12-30 KR KR1019890020358A patent/KR930000296B1/en not_active IP Right Cessation
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KR910011379A (en) | 1991-08-07 |
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