JPS62241617A - Wire-cut electric discharge processing device - Google Patents
Wire-cut electric discharge processing deviceInfo
- Publication number
- JPS62241617A JPS62241617A JP8495486A JP8495486A JPS62241617A JP S62241617 A JPS62241617 A JP S62241617A JP 8495486 A JP8495486 A JP 8495486A JP 8495486 A JP8495486 A JP 8495486A JP S62241617 A JPS62241617 A JP S62241617A
- Authority
- JP
- Japan
- Prior art keywords
- board
- surface plate
- wire
- electric discharge
- specific resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 claims abstract description 17
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 239000010949 copper Substances 0.000 claims abstract description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 3
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 3
- 238000000576 coating method Methods 0.000 claims abstract description 3
- 238000007747 plating Methods 0.000 claims abstract 3
- 238000003754 machining Methods 0.000 claims description 9
- 238000009763 wire-cut EDM Methods 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000007751 thermal spraying Methods 0.000 claims description 2
- 238000001465 metallisation Methods 0.000 abstract 2
- 238000007599 discharging Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 230000013011 mating Effects 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000002500 effect on skin Effects 0.000 description 1
- 238000009760 electrical discharge machining Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Landscapes
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分計〕
本発明はワイヤカット放電加工装置、特に被加工物を固
定する定盤の構造に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to a wire-cut electrical discharge machining apparatus, and particularly to the structure of a surface plate for fixing a workpiece.
第２図は従来のワイヤカット放電加工装置の一例を示す
説明図で、第３図は第２図の配線用電線の接続図である
。これらの図において、（１）は供給ボビン（２）から
送り出されるワイヤ電極、（３）は電磁ブレーキ（３ａ
）に直結されワイヤ電極（１）に所定の張力を与えるブ
レーキローラ、（４１）、 （４ｂＬ （４ｅ）はそれ
ぞれワイヤ電極間（１）の走行方向を変更させるアイド
ラである。（５）は上部ガイド、（６）は下部ガイド兼
給電ダイスである。これら（５１，（６１は、それぞれ
加工液噴出ノイズの内部に配置されている。なお、（９
）は加工液を供給するポンプである。ワイヤ電極（１）
は上部ガイド（５）と下部ガイド（６）とによって支持
され、符号−で示す被加工物に対し所定の方向に対向さ
せである。ａＤはワイヤ電極（１）と被加工物α２の間
に放電を起こさせるためのパルス電源ユニットである。FIG. 2 is an explanatory diagram showing an example of a conventional wire-cut electrical discharge machining apparatus, and FIG. 3 is a connection diagram of the wiring electric wires shown in FIG. 2. In these figures, (1) is the wire electrode sent out from the supply bobbin (2), and (3) is the electromagnetic brake (3a).
) is directly connected to the brake roller that applies a predetermined tension to the wire electrode (1), (41) and (4bL (4e) are respectively idlers that change the running direction of the wire electrode (1). (5) is the upper The guide (6) is a lower guide and power feeding die.These (51 and (61) are respectively arranged inside the machining fluid spouting noise.In addition, (9)
) is a pump that supplies machining fluid. Wire electrode (1)
is supported by an upper guide (5) and a lower guide (6), and is opposed in a predetermined direction to the workpiece indicated by the symbol -. aD is a pulse power supply unit for causing electric discharge between the wire electrode (1) and the workpiece α2.
Ｑ、４１ 、 Ｑ５１ 、００１は第３図に符号αηで
示される電源より電力を供給する電線で、それぞれ同軸
コード０４）、同軸ケーブル叫及び極間配線コード叫と
呼ばれている。同軸コード圓と同軸ケーブル叫は端子台
（至）で接続される。また極間配線コード叫はＸ−Ｙケ
ーブル０湧上の定盤■に複数本分岐して接続されている
。このため、定盤■の一部すなわち極間配線コード０６
１と被加工物０ｚとを結ぶ経路にも電流が流れろ。第３
図において、下部の給電端子（６＆）には接続された図
を省略しているが同軸ケーブル叫は実際は複数本接続さ
れている。Q, 41, Q51, and 001 are electric wires that supply power from a power source indicated by the symbol αη in FIG. 3, and are respectively called a coaxial cord 04), a coaxial cable line, and an interpole wiring code line. The coaxial cord and coaxial cable are connected by a terminal block (to). In addition, multiple pole wiring cords are connected to the surface plate (■) above the X-Y cable 0 in multiple branches. For this reason, part of the surface plate ■, that is, the wiring code 06 between the poles.
Current should also flow through the path connecting 1 and workpiece 0z. Third
In the figure, although the illustration of the connection to the lower power supply terminal (6&) is omitted, a plurality of coaxial cables are actually connected.
以上の電源から加工先端までの等価回路を示すと第４図
のとおりとなる。The equivalent circuit from the above power supply to the processing tip is shown in Fig. 4.
同軸コード圓、同軸ケーブル四及び極間配線コードＯＢ
＋の各電線並びに電流が流れる部分の定盤圓のインダク
タンスしく２３及び抵抗Ｒｔ２ＩＪが直列に接続された
形をとっている。Coaxial cord circle, coaxial cable four and interpolation wiring code OB
The positive wires, the inductance 23 of the surface plate round where the current flows, and the resistor Rt2IJ are connected in series.
上記のように構成した従来装置の動作を説明すれば次の
通りである。まず、ワイヤ電極（１）と同軸方向に加工
液００）を噴出しつつワイヤ電極（１）と被加工物（２
）の相互間にパルス電圧を加える。対向した微小間隙は
加工Ｍ （１０）を媒体として放電が繰す返され、放電
時の熱エネルギーによって被加工物＋１２を溶融飛散さ
せる。The operation of the conventional device configured as described above will be explained as follows. First, the wire electrode (1) and the workpiece (2) are spouted out in the coaxial direction with the wire electrode (1).
), apply a pulse voltage between them. Electric discharge is repeated in the opposing micro-gap using machining M (10) as a medium, and the workpiece +12 is melted and scattered by the thermal energy during the discharge.
また、対抗する微小間隙を常に一定に保ち、放電を断続
的に行うためのワイヤ電極（１）と被加工物面との相対
移動は、ｘ−ｙクロステーブル０９）（第３図）を数値
制御する方法により通常おこなわれている。このように
して放電を繰り返しＸ−Ｙテーブルを制御することによ
り加工溝が連続的に形成され任意の形状に被加工物面を
加工する。In addition, the relative movement between the wire electrode (1) and the workpiece surface in order to keep the opposing microgap always constant and to perform the discharge intermittently is determined using the x-y cross table 09) (Figure 3). This is usually done by a controlled method. By repeating the discharge and controlling the X-Y table in this manner, machining grooves are continuously formed and the surface of the workpiece is machined into an arbitrary shape.
上記のように構成された従来のワイヤカット放電加工装
置においては、種間配線コード０６）を接続した部分か
ら被加工物（２）を固定した部分まで、電流が定盤■を
流れる。このときの電流は高周波パルス電流（放電電流
）であるため、表皮効果により表面層にのみ流れ、固有
抵抗が大きいと発熱も著しくものになる。そして、この
場きは局部的な発熱であるため、局所的に熱ひずみが発
生し、定盤■にねじれ等を生じている。このため、被加
工物面の平面度が保たれず、高精度加工ができないとい
う問題があった。In the conventional wire-cut electrical discharge machining apparatus configured as described above, a current flows through the surface plate (2) from the part where the inter-species wiring cord 06) is connected to the part to which the workpiece (2) is fixed. Since the current at this time is a high-frequency pulse current (discharge current), it flows only to the surface layer due to the skin effect, and if the specific resistance is large, heat generation will be significant. Since heat is generated locally at this point, thermal strain occurs locally, causing twisting and the like in the surface plate (2). For this reason, there was a problem in that the flatness of the surface of the workpiece could not be maintained and high precision machining could not be performed.
また、従来の定盤はその素材は鋳鉄やステンレス鋳物で
、固有抵抗が大きく、このため、第４図に示す抵抗（２
）の値が大きくなることになり高周波パルス電流のピー
ク値の大きさや幅に影響を及ぼしている。つまり、抵抗
（至）値が大きいほどピーク値が低くなり幅は広くなる
。従ってＴ１源内部のジュール熱、損失も大きくなり高
速加工ができにくい等の問題点もあった。In addition, conventional surface plates are made of cast iron or cast stainless steel, and have a high specific resistance.
) increases, which affects the size and width of the peak value of the high-frequency pulse current. In other words, the larger the resistance value, the lower the peak value and the wider the width. Therefore, the Joule heat and loss inside the T1 source become large, resulting in problems such as difficulty in high-speed processing.
この発明は上記のような問題点を解消するなめになされ
たものであり、定盤の固有抵抗を実質的に小さくしたワ
イヤカット放電加工装置を得ることを目的とする。The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to obtain a wire-cut electrical discharge machining apparatus in which the specific resistance of the surface plate is substantially reduced.
本発明に係るワイヤカット放電加工装置は、被加工物を
固定する定盤の一部又は全部の全面を、定盤を構成する
材料より固有抵抗の小さい材料で被覆したものである。In the wire-cut electrical discharge machining apparatus according to the present invention, part or all of the surface plate for fixing the workpiece is coated with a material having a lower specific resistance than the material constituting the surface plate.
本発明においては、高周波パルス電流が定盤の表面層に
流れるが、その部分は固有抵抗の小さな構成で構成され
ているので、定盤の抵抗値は実質的に減少する。In the present invention, a high-frequency pulse current flows through the surface layer of the surface plate, and since that portion is constructed with a structure having a small specific resistance, the resistance value of the surface plate is substantially reduced.
以下、本発明の実施例を図に基づいて説明する。 Embodiments of the present invention will be described below based on the drawings.
第１図（Ａ） 、 （Ｂ）は本発明の一実施例に係るワ
イヤカット放電加工装置の定盤の斜視図及びその一部所
面図である。これらの図において、第２図及び第３図と
同一符号のものは同一のものを示す。図において、２１
１は定盤で、（２）は定盤Ｑ１１の一部又は全表面を覆
った被覆材で導電率の良い金属例えば、銅、アルミニウ
ム、銅合金、アルミニウム合金等が用いられる。そして
、この被覆材（社）はメッキ。FIGS. 1A and 1B are a perspective view and a partial plan view of a surface plate of a wire-cut electric discharge machining apparatus according to an embodiment of the present invention. In these figures, the same reference numerals as in FIGS. 2 and 3 indicate the same components. In the figure, 21
1 is a surface plate, and (2) is a covering material that covers part or all of the surface of the surface plate Q11, and is made of a metal with good conductivity, such as copper, aluminum, copper alloy, aluminum alloy, etc. This covering material is plated.
溶射又はシート材の貼り付のいずれでもよい。Either thermal spraying or pasting of sheet material may be used.
ここで、定盤Ｉ２υに流れる電流の深さくδ）は次式％
式％
ρ； 固有抵抗
μ０；真空透確率
μｒ；比透比率
確率 ２πｆ
ｆ； 周波数
従って、周波数ｆが高い程表皮危δは小さく、電流密度
が上がるが、この表皮部の固有抵抗ρが小さい程発熱は
小さくなる。この実施例では、定盤Ｑυの表面を固有抵
抗ρの小さい被覆材（２）で覆っているので、必然的に
その発熱は極めて小さいものとなっている。また、抵抗
値が減少しているから、パルス電流のピーク値やパルス
幅が抑制きれるということもなくなっている。Here, the depth δ) of the current flowing through the surface plate I2υ is calculated by the following formula %
Formula % ρ; Specific resistance µ0; Vacuum permeability probability µr; Specific permeability ratio probability 2πf f; Frequency Therefore, the higher the frequency f, the smaller the skin danger δ, and the higher the current density, but the smaller the specific resistance ρ of this skin part, the lower the Fever is reduced. In this embodiment, since the surface of the surface plate Qυ is covered with the covering material (2) having a small specific resistance ρ, the heat generated by the covering material (2) is inevitably extremely small. Furthermore, since the resistance value is reduced, it is no longer possible to completely suppress the peak value and pulse width of the pulse current.
以上のように本発明によれば定盤を固有抵抗の小さい被
覆材で覆ったので、定盤の抵抗値は実質的に減少し、発
熱が押さえられており、また、被覆材は防錆を兼ねるこ
とができる。更に、従来用いろことができなかった熱膨
張の小さいセラミックス等も定盤に用いるとができ、銅
、アルミニウム及びその合金類は熱伝導率も良く、熱が
拡散し易いので熱ひずみが起こりにくい。As described above, according to the present invention, since the surface plate is covered with a coating material having low specific resistance, the resistance value of the surface plate is substantially reduced and heat generation is suppressed. Can serve as both. Furthermore, ceramics with low thermal expansion, which could not be used in the past, can be used for the surface plate. Copper, aluminum, and their alloys have good thermal conductivity and easily diffuse heat, so thermal distortion is difficult to occur. .
第１図（Ａ）、（Ｂ）は本発明の一実施例に係るワイヤ
カット放電加工装置の定盤の斜視図及びその一部所面図
、第２図はワイヤカット放電加工機の要部構成図、第３
図は配線用電線の接続図、第４図は放電加工回路の概要
を示す図である。
図において、■は定盤、シＤは被覆材である。
なお、図中同一符号は同一または相当部分を示す。Figures 1 (A) and (B) are perspective views and partial views of the surface plate of a wire-cut electric discharge machine according to an embodiment of the present invention, and Figure 2 is a main part of the wire-cut electric discharge machine. Configuration diagram, 3rd
The figure is a connection diagram of wiring electric wires, and FIG. 4 is a diagram showing an outline of an electrical discharge machining circuit. In the figure, ■ is a surface plate, and D is a covering material. Note that the same reference numerals in the figures indicate the same or corresponding parts.
Claims (4)
、当該定盤を構成する材料より固有抵抗の小さい材料で
被覆したことを特徴とするワイヤカット放電加工装置。(1) A wire-cut electric discharge machining apparatus characterized in that a part or all of the surface of a surface plate for fixing a workpiece is coated with a material having a lower specific resistance than the material constituting the surface plate.
当該定盤より固有抵抗の小さい材料で被覆した特許請求
の範囲第１項記載のワイヤカット放電加工装置。(2) The surface of the metal surface plate is plated or sprayed,
The wire-cut electric discharge machining apparatus according to claim 1, wherein the surface plate is coated with a material having a lower specific resistance than the surface plate.
より、当該定盤より固有抵抗の小さい材料で被覆した特
許請求の範囲第１項記載のワイヤカットの放電加工装置
。(3) The wire-cut electric discharge machining apparatus according to claim 1, wherein the surface of the ceramic surface plate is coated with a material having a lower specific resistance than the surface plate by plating or thermal spraying.
又はアルミニウム合金を用いた特許請求の範囲第１項、
第２項又は第３項記載のワイヤカット放電加工装置。(4) Claim 1, in which copper, copper alloy, aluminum, or aluminum alloy is used as the coating material;
The wire-cut electrical discharge machining apparatus according to item 2 or 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8495486A JPS62241617A (en) | 1986-04-15 | 1986-04-15 | Wire-cut electric discharge processing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8495486A JPS62241617A (en) | 1986-04-15 | 1986-04-15 | Wire-cut electric discharge processing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62241617A true JPS62241617A (en) | 1987-10-22 |
Family
ID=13845026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8495486A Pending JPS62241617A (en) | 1986-04-15 | 1986-04-15 | Wire-cut electric discharge processing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62241617A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04115823A (en) * | 1990-09-04 | 1992-04-16 | Fanuc Ltd | Workpiece setting bed for electric discharge machining device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5894923A (en) * | 1981-12-02 | 1983-06-06 | Mitsubishi Electric Corp | Electric discharge equipment |
-
1986
- 1986-04-15 JP JP8495486A patent/JPS62241617A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5894923A (en) * | 1981-12-02 | 1983-06-06 | Mitsubishi Electric Corp | Electric discharge equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04115823A (en) * | 1990-09-04 | 1992-04-16 | Fanuc Ltd | Workpiece setting bed for electric discharge machining device |
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