KR100416484B1 - Inclination angle forming method of cnc wire electric discharge machine - Google Patents
Inclination angle forming method of cnc wire electric discharge machine Download PDFInfo
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- KR100416484B1 KR100416484B1 KR1019960080944A KR19960080944A KR100416484B1 KR 100416484 B1 KR100416484 B1 KR 100416484B1 KR 1019960080944 A KR1019960080944 A KR 1019960080944A KR 19960080944 A KR19960080944 A KR 19960080944A KR 100416484 B1 KR100416484 B1 KR 100416484B1
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- inclination angle
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- electric discharge
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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
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/14—Electric circuits specially adapted therefor, e.g. power supply
- B23H7/20—Electric circuits specially adapted therefor, e.g. power supply for programme-control, e.g. adaptive
-
- 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
- B23H7/00—Processes or apparatus applicable to both electrical discharge machining and electrochemical machining
- B23H7/02—Wire-cutting
-
- 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
- B23H2400/00—Moving mechanisms for tool electrodes
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/45—Nc applications
- G05B2219/45043—EDM machine, wire cutting
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
Description
도 1은 CNC 와이어 방전가공기의 개략적인 구성도1 is a schematic configuration diagram of a CNC wire electric discharge machine
도 2는 와이어의 각도와 와이어가이드의 위치 관계를 나타내는 설명도2 is an explanatory diagram showing a positional relationship between an angle of a wire and a wire guide;
도 3은 다이스의 단면도 및 접점의 위치 관계를 나타내는 설명도3 is an explanatory diagram showing a cross-sectional view of a die and a positional relationship between the contacts;
도 4 내지 도 6은 본 발명의 구성을 나타내는 설명도4 to 6 are explanatory diagrams showing the configuration of the present invention.
<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>
1 : 상부가이드1: Upper guide
2 : 하부가이드2: lower guide
5 : 와이어5: wire
7 : 수직내기치구7: vertical fixture
[발명의목적][Objective of the invention]
본 발명은 CNC 와이어 방전가공기로 공작물을 경사각 가공하는데 있어 경사각을 정밀하고 용이하게 설정하기 위한 것이다.The present invention is to accurately and easily set the inclination angle in the inclination angle machining of the workpiece with a CNC wire electric discharge machine.
[발명이속하는기술분야및그분야의종래기술][Technical Field to which the Invention belongs and Conventional Technology in the Field]
본 발명은 CNC 와이어 방전가공기의 경사각 가공 방법에 관한 것으로, 접촉 좌표를 피드백 받아 이를 토대로 정확한 각도를 주는 가이드 위치를 산출해서, 경사각 설정의 정밀도 및 용이성을 향상시키도록 한 것이다.The present invention relates to a method for machining an inclination angle of a CNC wire electric discharge machine, and to calculate the guide position giving an accurate angle based on the feedback of contact coordinates, thereby improving the accuracy and ease of setting the inclination angle.
CNC(Computer Numerical Control) 와이어 방전가공기(이하 방전가공기라 함)는 대전된 와이어를 공작물에 접촉시켜, 이 때 발생하는 방전 에너지를 이용해서 공작물을 절삭 가공하는 기기이다. 와이어의 이동은 컴퓨터수치제어를 통해 제어한다.The CNC (Computer Numerical Control) wire electric discharge machine (hereinafter referred to as electric discharge machine) is a device that contacts a charged wire with a work and cuts the work using discharge energy generated at this time. The movement of the wire is controlled by computer numerical control.
도 1은 방전가공기의 개략적인 구성도이다.1 is a schematic configuration diagram of an electric discharge machine.
공작물설치대(3)를 부착하고 있는 테이블(4)과, 상부가이드(1), 하부가이드(2)가 있고, 상부다이스(10)와 하부다이스(20)를 통해 와이어(5)가 연결된다.There is a table (4) to which the work mounting table (3) is attached, an upper guide (1), a lower guide (2), and a wire (5) is connected through the upper die (10) and the lower die (20).
테이블(4)은 평면상에서 움직일 수 있고, 상부가이드(1)는 상하 축방향 및 평면상의 이동이 모두 가능하며, 하부가이드(2)는 컬럼(6)에 고정되어 움직이지 않는다.The table 4 can move in a plane, the upper guide 1 can move in both the up and down axial direction and the plane, and the lower guide 2 is fixed to the column 6 and does not move.
공작물의 경사각 가공을 하기 위해서는 와이어의 각도를 지정된 만큼 정확하게 설정해야 하는데, 이를 위해 방전가공기의 수치제어 프로그램에 넣어 주는 데이타는, 도 2에서 나타낸 바와 같이 공작물설치대(3) 상부면과 상부다이스(10), 하부다이스(20) 사이의 수직이격거리 T₁과 T₂이다. 이 위치에서 가공하고자 하는 각도 θ₁를 입력하면, 수평이격거리 d₁과 d₂가 산출되어 상부가이드 및 테이블이 이동한다.In order to process the inclination angle of the workpiece, the angle of the wire must be set exactly as specified. For this purpose, the data to be put into the numerical control program of the electric discharge machine is as shown in FIG. 2. ), And the vertical separation distance T₁ and T₂ between the lower dice 20. If the angle θ₁ to be machined is input at this position, the horizontal separation distances d₁ and d₂ are calculated and the upper guide and the table move.
d₁과 d₂는 각각 다음의 수학식 1에 의해 구해진다.d₁ and d₂ are each obtained by the following equation (1).
[수학식 1][Equation 1]
그러나 상기와 같은 방법으로는 정확한 각도의 설정이 곤란하여 보정이 필요하다. 도 3은 상기 사정을 설명한다.However, the above-described method is difficult to set the correct angle and correction is necessary. 3 illustrates the above situation.
와이어(5)를 고정하는 다이스(10,20)는 와이어와의 접촉면 모서리가 둥글게 형성된다. 따라서 와이어의 각도에 따라 접점의 위치가 달라진다. θ₁이 0일때 접점의 위치가 가장 높고 θ₁이 증가하면 접점의 위치가 낮아진다. 모서리가 각이 지면 접점은 일정하게 유지될 수 있지만 와이어가 꺾이는 문제가 생기므로 이와 같이 모서리를 둥글게 유지한다.The dice 10 and 20 for fixing the wire 5 have rounded contact surface edges with the wire. Therefore, the position of the contact varies according to the angle of the wire. When θ₁ is 0, the position of the contact is the highest, and when θ₁ increases, the position of the contact is lowered. If the corners are angled, the contact can be kept constant, but keep the corners round in this way because of the problem of wire bending.
하지만, 이 경우 상부가이드의 높이에 따라 접점 위치가 변경되므로 입력된 데이타에 따라 와이어의 각도가 정확하게 설정되지 않게 된다.However, in this case, since the contact position is changed according to the height of the upper guide, the angle of the wire is not set correctly according to the input data.
종래에는 상기와 같은 문제점을 보정하기 위해 가공 후 수정하는 방법을 사용한다. 그러나 이렇게 하는 경우 각도에 따라 매번 시험적으로 가공을 해 보아야하므로 시간의 낭비, 소재의 소모 등이 발생하고, 와이어의 굵기, 다이스의 마모 정도에 따라서 다른 결과가 나오기 때문에 정확한 가공에 어려움이 있다.Conventionally, a method of correcting after machining is used to correct the above problems. However, in this case, it is difficult to precisely process because it is necessary to process the test every time according to the angle, waste of time, material consumption, and other results are produced depending on the thickness of the wire and the degree of wear of the die.
[발명이이루고자하는기술적과제][Technical Challenges to Invent]
본 발명은 상기와 같은 종래 기술의 문제점을 해결하기 위해 창안된 것으로, 와이어의 경사각 설정을 정확하고 용이하게 하는 새로운 방법을 제공하는데 그 목적이 있다.The present invention has been made to solve the above problems of the prior art, and an object thereof is to provide a new method for accurately and easily setting the inclination angle of the wire.
상기와 같은 목적을 달성하기 위해 본 발명은 수직내기치구를 이용하여 실제의 와이어 경사각을 산출하고 이에 따라 입력 데이타를 보정하여 정밀한 각도의 가공을 할 수 있게 한다.In order to achieve the above object, the present invention calculates the actual angle of inclination of the wire by using a vertical internal jig and corrects the input data accordingly to enable precise angle processing.
[발명의구성및작용]Composition and Action of the Invention
이하에서 본 발명의 바람직한 실시예를 첨부된 도면에 의거하여 상세히 설명하기로 한다. 본 발명의 설명에서 종래와 동일 또는 동등한 부분은 같은 도면 부호로 표기하여 설명한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the present invention, the same or equivalent parts as in the prior art will be described with the same reference numerals.
도 4내지 도 6은 본 발명의 설명도이다.4 to 6 are explanatory diagrams of the present invention.
T₁, T₂ 및 각도 θ₁이 입력되면 와이어(5)는 수평거리 d₁, d₂로 이동하여 실제의 각도 θ₂를 이루게 된다. 상기 각도 θ₂를 측정하기 위해 다음의 방법을 사용한다.When T₁, T₂ and angle θ₁ are input, the wire 5 moves to the horizontal distance d₁, d₂ to achieve the actual angle θ₂. The following method is used to measure the angle θ₂.
공작물설치대(3) 위에 수직내기치구(7)를 고정시키고 이를 접촉센서로 활용한다. 방전가공기는 전기를 이용하여 가공하기 때문에 가공기 자체가 센서 역할을 할 수 있고, 서보모터를 사용함으로써 정확한 위치를 피드백 받는 것이 가능하다.Fix vertical jig (7) on the worktable (3) and use it as a contact sensor. Since the electric discharge machine processes by using electricity, the machine itself can act as a sensor, and by using a servo motor, it is possible to receive a precise position feedback.
각도θ₁을 좌측으로 지정하여 실제 각도 θ₂를 이루게 한 후, 와이어(5)가 수직내기치구(7)와 접촉되도록 수평 이동시킨다.After setting the angle θ 으로 to the left to achieve the actual angle θ₂, the wire 5 is horizontally moved to contact the vertical positioning jig 7.
수직내기치구와 접촉하면 접촉점의 좌표 x₁을 읽고 원래의 위치로 복귀시킨다.In contact with the vertical positioning tool, the coordinate x₁ of the contact point is read and returned to its original position.
각도 θ₁을 우측으로 지정하여 실제 각도 θ₂를 이루게 하고, 와이어가 수직내기치구와 접촉되도록 수평 이동시킨다.Set the angle θ₁ to the right to achieve the actual angle θ₂ and move it horizontally so that the wire is in contact with the vertical tool.
수직내기치구와 접촉하면 접촉점의 좌표 x₂를 읽고 원래의 위치로 복귀시킨다.When it comes into contact with the vertical tool, the coordinate x₂ of the contact point is read and returned to its original position.
이상과 같이 접촉점의 좌표 x₁, x₂를 결정하면 실제의 각도 θ₂는 도 6에서 나타낸 바와 같이 다음의 수학식 2로 결정된다.As described above, when the coordinates x₁ and x₂ of the contact point are determined, the actual angle θ₂ is determined by Equation 2 as shown in FIG. 6.
[수학식 2][Equation 2]
상기 식에서 H는 수직내기치구의 높이를 나타내고, x₃는 접촉점의 좌표차를 나타낸다.In the above formula, H represents the height of the vertical internal fixture, and x₃ represents the coordinate difference of the contact point.
상기 수학식 2에서 구한 각도 θ₂에 따라 수정되는 초기 입력 데이타는 다음과 같이 수학식 3에 의해 구할 수 있다.The initial input data modified according to the angle θ₂ obtained in Equation 2 can be obtained by Equation 3 as follows.
[수학식 3][Equation 3]
이상과 같이 수정된 T₃, T₄를 새로이 방전가공기의 수치제어 프로그램에 입력함으로써, 와이어를 정확한 각도로 설정할 수 있다.By inputting the modified T₃, T₄ as described above into the numerical control program of the electric discharge machining machine, the wire can be set at the correct angle.
[발명의효과][Effects of the Invention]
이상에서 설명한 바와 같이 본 발명은 수직내기치구를 접촉센서로 활용하여 수치제어 프로그램에 의해 와이어의 경사각을 정확하게 산출하도록 하여, 소재의 두께나 경사각, 와이어의 굵기, 기타 가공 조건 변수에 관계없이 정확하게 와이어의 경사각을 얻을 수 있다.As described above, the present invention utilizes a vertical positioning tool as a contact sensor to accurately calculate the inclination angle of the wire by a numerical control program, so that the wire can be accurately wired regardless of the thickness of the material, the inclination angle, the thickness of the wire, and other processing condition variables. The angle of inclination of can be obtained.
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JPS6339732A (en) * | 1986-08-01 | 1988-02-20 | Mitsubishi Electric Corp | Inclined machining control device of wire electric spark machining device |
JPS63139617A (en) * | 1986-11-28 | 1988-06-11 | Nec Corp | Wire vertical positioning processing system for wire electric discharge machining |
JPH01103229A (en) * | 1987-10-16 | 1989-04-20 | Inoue Japax Res Inc | Vertical feed of wire by two point contact method |
JPH02279220A (en) * | 1989-04-19 | 1990-11-15 | Mitsubishi Electric Corp | Wire electric discharge machining apparatus |
JPH08336727A (en) * | 1995-05-11 | 1996-12-24 | Charmilles Technol Sa | Machining device by electric corrosion |
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS6339732A (en) * | 1986-08-01 | 1988-02-20 | Mitsubishi Electric Corp | Inclined machining control device of wire electric spark machining device |
JPS63139617A (en) * | 1986-11-28 | 1988-06-11 | Nec Corp | Wire vertical positioning processing system for wire electric discharge machining |
JPH01103229A (en) * | 1987-10-16 | 1989-04-20 | Inoue Japax Res Inc | Vertical feed of wire by two point contact method |
JPH02279220A (en) * | 1989-04-19 | 1990-11-15 | Mitsubishi Electric Corp | Wire electric discharge machining apparatus |
JPH08336727A (en) * | 1995-05-11 | 1996-12-24 | Charmilles Technol Sa | Machining device by electric corrosion |
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