JPS6318072A - Manufacture of brass electrode for wire electric discharge machining - Google Patents
Manufacture of brass electrode for wire electric discharge machiningInfo
- Publication number
- JPS6318072A JPS6318072A JP16042686A JP16042686A JPS6318072A JP S6318072 A JPS6318072 A JP S6318072A JP 16042686 A JP16042686 A JP 16042686A JP 16042686 A JP16042686 A JP 16042686A JP S6318072 A JPS6318072 A JP S6318072A
- Authority
- JP
- Japan
- Prior art keywords
- zinc
- vapor pressure
- zinc vapor
- vapor
- brass
- 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
- 229910001369 Brass Inorganic materials 0.000 title claims abstract description 24
- 239000010951 brass Substances 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 6
- 238000003754 machining Methods 0.000 title abstract description 10
- 239000011701 zinc Substances 0.000 claims abstract description 55
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 55
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 52
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 15
- 238000009763 wire-cut EDM Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 20
- 238000000034 method Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 11
- 238000009760 electrical discharge machining Methods 0.000 description 9
- 239000010949 copper Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 238000005491 wire drawing Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910001297 Zn alloy Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
Landscapes
- Physical Vapour Deposition (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はワイヤ放電加工用黄銅電極線の製造方法に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a brass electrode wire for wire electrical discharge machining.
ワイヤ放電加工は加工用電極線と被加工物との間で放電
現象を起こさせ、該放電により被加工物を溶融除去する
ものであって、特に複雑で精密な形状の被加工物例えば
プレス金型等の加工に用いられている。Wire electric discharge machining involves creating an electric discharge phenomenon between a machining electrode wire and a workpiece, and melting and removing the workpiece by the electric discharge. Used for processing molds, etc.
この様な放電加工用電極線としては従来銅線が用いられ
ていたが、最近は銅に亜鉛を添加して放電加工速度を向
上させた黄銅線、特にＣｕ−５５％Ｚ姶金線が広く用い
られている。Conventionally, copper wires have been used as electrode wires for electrical discharge machining, but recently brass wires, in particular Cu-55%Z gold wires, are widely used, which improve the electrical discharge machining speed by adding zinc to copper. It is used.
上記黄銅電極線は伸線加工時の加工硬化が大きいため、
伸線途中で熱処理を行なって材料を一旦軟化させてから
更に伸線を続ける必要があり、又製品に要求される特性
を出すために伸線後熱処理を行なって調質する必要があ
るが、従来は炉内温度５００〜６００℃の連続熱処理炉
で無酸化雰囲気中で熱処理を行なっていた。The above brass electrode wire has a large work hardening during wire drawing, so
It is necessary to perform heat treatment during wire drawing to soften the material before continuing wire drawing, and it is also necessary to perform heat treatment after wire drawing to refine the material in order to obtain the characteristics required for the product. Conventionally, heat treatment was carried out in a non-oxidizing atmosphere in a continuous heat treatment furnace with an internal temperature of 500 to 600°C.
〔発明が解決しようとする問題点ｊ
ところが黄銅材料のように亜鉛量が多い銅合金−６４０
０−１１５０℃以上に加熱して熱処理すると、表面近く
の亜鉛が蒸発して脱亜鉛現象を起こし表層部の亜鉛濃度
が減少する。このように亜鉛濃度が減少した材料を電極
線に使用すると、放電加工時の加工速度が遅くなって能
率が低下し問題となっていた。[Problems to be solved by the invention j However, copper alloy-640 that has a large amount of zinc like brass materials
When heat-treated by heating to 0-1150° C. or higher, zinc near the surface evaporates, causing a dezincing phenomenon and reducing the zinc concentration in the surface layer. When a material with a reduced zinc concentration is used for an electrode wire, the machining speed during electrical discharge machining becomes slow, resulting in a decrease in efficiency, which poses a problem.
本発明はこのような問題点を解決するため鋭意研究の結
果得られたものであって、飽和蒸気圧以上の亜鉛蒸気中
で熱処理することを特徴とする特イヤ放電加工用黄銅電
極線の製造方法である。The present invention was obtained as a result of intensive research in order to solve these problems, and is directed to the production of a special-ear brass electrode wire for electrical discharge machining, which is heat-treated in zinc vapor at a pressure higher than the saturated vapor pressure. It's a method.
本発明は雰囲気ガス中に過飽和に存在する亜鉛が黄銅に
対して浸亜鉛反応を起こすことに基づくものである。即
ち熱処理炉内を黄銅中への浸亜鉛が生じやすい無酸化雰
囲気にすると共に、該熱処理炉内に飽和蒸気圧以上の亜
鉛蒸気を充満させて、黄銅表面からの脱亜鉛を抑制する
と共に黄銅表面からの拡散等による浸亜鉛を促進し、表
層部の亜鉛濃度を維持又は向上させて放電加工速度の維
持又は向上をはかろうとするものである。The present invention is based on the fact that supersaturated zinc present in the atmospheric gas causes a galvanizing reaction on brass. In other words, the inside of the heat treatment furnace is made into a non-oxidizing atmosphere where zinc penetration into the brass easily occurs, and the inside of the heat treatment furnace is filled with zinc vapor at a pressure higher than the saturated vapor pressure, thereby suppressing dezincification from the brass surface and removing zinc from the brass surface. The purpose is to maintain or improve the zinc concentration in the surface layer by promoting zinc immersion by diffusion etc. from the surface layer, thereby maintaining or improving the electrical discharge machining speed.
まず本発明に用いた熱処理装置の構成を第１図に示す。 First, the configuration of the heat treatment apparatus used in the present invention is shown in FIG.
１は走間型熱処理炉、２は温度コン）ローラ、５は温度
設定部、ヰは電流制御部、５は温度検出器、６はヒータ
ー、７は保護ガス供給源、８は調圧弁、９は亜鉛蒸気供
給源、１０は黄銅線、１１はバタフライバルブ、１２は
亜鉛蒸気検出器、１３は亜鉛蒸気分析計、１４は亜鉛蒸
気圧設定部、１５は亜鉛蒸気圧制御部、１６は亜鉛蒸気
コントローラ、１７はステンレスパイプである。1 is a running type heat treatment furnace, 2 is a temperature control roller, 5 is a temperature setting section, ヰ is a current control section, 5 is a temperature detector, 6 is a heater, 7 is a protective gas supply source, 8 is a pressure regulating valve, 9 is a zinc vapor supply source, 10 is a brass wire, 11 is a butterfly valve, 12 is a zinc vapor detector, 13 is a zinc vapor analyzer, 14 is a zinc vapor pressure setting section, 15 is a zinc vapor pressure control section, 16 is a zinc vapor The controller 17 is a stainless steel pipe.
走間型熱処理炉１は周知の構造を有しており、温度コン
トローラ２によって特定の炉内温度に設定されている。The running heat treatment furnace 1 has a well-known structure, and is set to a specific furnace temperature by a temperature controller 2.
即ち温度コントローラ２は温度設定部さ及び電流制御部
４より構成されており、温度検出器５によって検出され
た温度が温度設定部うで設定された温度になる様にヒー
ター６に流れる電流を制御する。That is, the temperature controller 2 is composed of a temperature setting section and a current control section 4, and controls the current flowing through the heater 6 so that the temperature detected by the temperature detector 5 becomes the temperature set by the temperature setting section. do.
保護ガス供給源７は、熱処理する黄銅線１０の表面酸化
を防止するＣＯガスを含み、このガスを熱処理炉１に供
給し得る圧力を有するものである。The protective gas supply source 7 contains CO gas to prevent surface oxidation of the brass wire 10 to be heat treated, and has a pressure capable of supplying this gas to the heat treatment furnace 1.
具体的には、保護ガスとしてＣＯ十ＣＯｔ＋ Ｎ！或い
はＣＯ＋ Ｃｏ！＋ Ａｒガスが使用される。これらの
ガスは調圧弁８を介して熱処理炉１に導かれ、該熱処理
炉内には常に一定圧力の保護ガスが充満している。Specifically, CO1COt+N! is used as a protective gas. Or CO+ Co! +Ar gas is used. These gases are led to the heat treatment furnace 1 through the pressure regulating valve 8, and the heat treatment furnace is always filled with protective gas at a constant pressure.
次に亜鉛蒸気供給源９よりバタフライバルブ１１を介し
て熱処理炉１に亜鉛蒸気を導入する。而して亜鉛蒸気検
出器１２で炉内ガスをサンプリングし、亜鉛蒸気分析計
１３で亜鉛蒸気の蒸気圧を計測する。亜鉛蒸気圧設定部
１４には任意の圧力下における温度−亜鉛飽和蒸気圧曲
線が予め設定されており、温度検出器５の出力によって
選択された亜鉛飽和蒸気圧が亜鉛蒸気圧制御部５に出力
され、そこで両者の差をとりその差に応じてサーボモー
タ等の駆動手段を介してバタフライバルブ１１の開度を
制御し、亜鉛蒸気供給源９から熱処理炉１０内のステン
レスパイプ１７の中への亜鉛蒸気供給量を調整する。即
ち亜鉛蒸気分析計１３で計測した亜鉛蒸気の蒸気圧に対
して、亜鉛蒸気圧設定部１１Ｉ及び蒸気圧制御部１５か
ら成る亜鉛蒸気コントローラ１６は常に炉内雰囲気中の
亜鉛蒸気圧を第２図に示す飽和蒸気圧以上に設定する。Next, zinc vapor is introduced into the heat treatment furnace 1 from the zinc vapor supply source 9 via the butterfly valve 11 . Then, a zinc vapor detector 12 samples the gas in the furnace, and a zinc vapor analyzer 13 measures the vapor pressure of the zinc vapor. A temperature-zinc saturated vapor pressure curve under an arbitrary pressure is preset in the zinc vapor pressure setting section 14, and the zinc saturated vapor pressure selected by the output of the temperature detector 5 is output to the zinc vapor pressure control section 5. Then, the difference between the two is determined, and the opening degree of the butterfly valve 11 is controlled via a drive means such as a servo motor according to the difference, and the amount of water flowing from the zinc vapor supply source 9 into the stainless steel pipe 17 in the heat treatment furnace 10 is controlled. Adjust zinc vapor supply rate. That is, with respect to the vapor pressure of zinc vapor measured by the zinc vapor analyzer 13, the zinc vapor controller 16 consisting of the zinc vapor pressure setting section 11I and the vapor pressure control section 15 always adjusts the zinc vapor pressure in the furnace atmosphere as shown in FIG. Set above the saturated vapor pressure shown in .
そしてこの様な亜鉛蒸気を含む雰囲気のステンレス管１
７の中を黄銅線１０を通過させ、浸亜鉛状態の下で熱処
理を行う。And stainless steel pipe 1 in an atmosphere containing zinc vapor like this
A brass wire 10 is passed through the wire 7 and heat-treated under galvanized conditions.
次に上記熱処理装置を用いた具体的な実施例について以
下に説明する。線径α２簡に伸線した黄銅線（Ｃｉｕ−
５５％Ｚｎ）を、Ｇｏ ＋ （Ｘ）ｔ＋ Ａｒガス雰囲
気中で、炉内温度を６００℃とし、亜鉛蒸気圧を飽和蒸
気圧以上の３ ｗｎ ＨｇＦＣ設定して、８０ ｍ ／
ｍｉｎの速度で通過させた。又比較例として亜鉛蒸気
圧を飽和蒸気圧以下のα５■Ｈｇに設定してやはり８０
？？ｌ ／ ｍｉｎの速度で通過させた。この様にして
製造した電極線と、従来の方式により６００℃の温度の
無酸化雰囲気中ｆ ８０ ｍ ／ ｍｉｎの速度で通過
させた黄銅電極線（Ｃｕ−３５％Ｚｎ）について、三菱
電機製ワイヤカット放電加工機（Ｄｗｅ −９０Ｆｌ
） ｋ使用して第１表に示す条件で加工を行った。Next, a specific example using the above heat treatment apparatus will be described below. Brass wire drawn to wire diameter α2 (Ciu-
55% Zn) in a Go + (X)t + Ar gas atmosphere, the furnace temperature was 600 °C, the zinc vapor pressure was set to 3 wn HgFC above the saturated vapor pressure, and 80 m /
It passed at a speed of min. As a comparative example, the zinc vapor pressure was set to α5■Hg below the saturated vapor pressure, and the result was still 80
? ? Passed at a speed of l/min. Regarding the electrode wire manufactured in this way and the brass electrode wire (Cu-35%Zn) passed through a non-oxidizing atmosphere at a temperature of 600 °C at a speed of f 80 m/min by the conventional method, a wire manufactured by Mitsubishi Electric was used. Cut electrical discharge machine (Dwe-90Fl
) Processing was carried out under the conditions shown in Table 1 using
第１表
注）＊電圧切換：無負荷時の極間電圧の大きさくＶｐ）
ｋ選定するためのツマミ
＊＊加エセッティング：ピーク電流（Ｉｐ）の大きさを
選定するためのツマミ
上記条件で放電加工した際の加工速度と、加工面につい
たＣｕの付着量を第２表に示す。同、加工速度は従来黄
銅線の速度を１００とし、又Ｃｕ付着量も従来黄銅線を
１００とした時の比較値で示した。Table 1 Note) *Voltage switching: Voltage between poles at no load (Vp)
K knob for selecting ** Processing setting: Knob for selecting the magnitude of peak current (Ip) Table 2 shows the machining speed and amount of Cu deposited on the machined surface when electrical discharge machining was performed under the above conditions. Shown below. Similarly, the processing speed is shown as a comparison value when the speed of the conventional brass wire is set as 100, and the amount of Cu deposit is also set as the speed of the conventional brass wire as 100.
第２表
第２表から明らかなように、亜鉛蒸気圧を飽和蒸気圧以
上の３＋ａｍＨｇに設定して熱処理を行った本発明によ
る電極線は、従来電極線にくらべて放電加工速度が速く
、Ｃｕ付着量が少なかった。これに対して、亜鉛蒸気圧
を飽和蒸気圧以下の０．５ ｍＨｇに設定して熱処理し
た比較電極線は、放電加工速度、Ｃｕ付着量共に従来電
極線と余り変わらなかりた。Table 2 As is clear from Table 2, the electrode wire according to the present invention, which was heat-treated with the zinc vapor pressure set to 3+amHg, which is higher than the saturated vapor pressure, had a faster electrical discharge machining speed than the conventional electrode wire, and The amount of adhesion was small. On the other hand, the comparison electrode wire heat-treated with the zinc vapor pressure set to 0.5 mHg, which is below the saturated vapor pressure, was not much different from the conventional electrode wire in terms of electric discharge machining speed and amount of Cu deposited.
本発明により製造した放電加工用黄銅電極線は、従来の
黄銅電極線に比べて、放電加工速度及び付着物量の点で
優れた特性を有しており、放電加工機の加工能率を著し
く向上出来る等工業上顕著な効果を奏するものである。The brass electrode wire for electrical discharge machining manufactured according to the present invention has superior characteristics in terms of electrical discharge machining speed and amount of deposits compared to conventional brass electrode wires, and can significantly improve the machining efficiency of electrical discharge machines. It has remarkable industrial effects.
第１図は本発明に用いた熱処理装置の説明図、第２図は
銅−亜鉛合金における温度と亜鉛の飽和蒸気圧との関係
を示す特性図である。FIG. 1 is an explanatory diagram of the heat treatment apparatus used in the present invention, and FIG. 2 is a characteristic diagram showing the relationship between temperature and saturated vapor pressure of zinc in a copper-zinc alloy.
Claims (1)
するワイヤ放電加工用黄銅電極線の製造方法。A method for producing a brass electrode wire for wire electrical discharge machining, which comprises heat treating in zinc vapor at a saturated vapor pressure or higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16042686A JPS6318072A (en) | 1986-07-08 | 1986-07-08 | Manufacture of brass electrode for wire electric discharge machining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16042686A JPS6318072A (en) | 1986-07-08 | 1986-07-08 | Manufacture of brass electrode for wire electric discharge machining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6318072A true JPS6318072A (en) | 1988-01-25 |
Family
ID=15714671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16042686A Pending JPS6318072A (en) | 1986-07-08 | 1986-07-08 | Manufacture of brass electrode for wire electric discharge machining |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6318072A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0590091U (en) * | 1992-05-18 | 1993-12-07 | 株式会社長野計器製作所 | accumulator |
| EP0734805A1 (en) * | 1995-03-27 | 1996-10-02 | Thermocompact | Method and apparatus for making wire electrodes for electric discharge machining, and the wire electrodes thus obtained |
| EP0850716A1 (en) * | 1996-12-26 | 1998-07-01 | Sumitomo Electric Industries, Ltd | Wire electrode for electro-discharge machining and manufacturing method thereof |
| US6159543A (en) * | 1995-11-12 | 2000-12-12 | Charmilles Technologies Sa | Processes for manufacturing wires with a brass surface |
-
1986
- 1986-07-08 JP JP16042686A patent/JPS6318072A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0590091U (en) * | 1992-05-18 | 1993-12-07 | 株式会社長野計器製作所 | accumulator |
| EP0734805A1 (en) * | 1995-03-27 | 1996-10-02 | Thermocompact | Method and apparatus for making wire electrodes for electric discharge machining, and the wire electrodes thus obtained |
| FR2732251A1 (en) * | 1995-03-27 | 1996-10-04 | Thermocompact Sa | PROCESS AND DEVICE FOR MANUFACTURING ELECTRODE WIRE FOR EROSIVE SPARKING, AND WIRE THUS OBTAINED |
| US6159543A (en) * | 1995-11-12 | 2000-12-12 | Charmilles Technologies Sa | Processes for manufacturing wires with a brass surface |
| EP0850716A1 (en) * | 1996-12-26 | 1998-07-01 | Sumitomo Electric Industries, Ltd | Wire electrode for electro-discharge machining and manufacturing method thereof |
| US6300587B1 (en) | 1996-12-26 | 2001-10-09 | Sumitomo Electric Industries, Ltd. | Wire electrode for electro-discharge machining and manufacturing method thereof |
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