WO2020015564A1 - 一种放电加工用电极丝的碾压加工装置 - Google Patents

一种放电加工用电极丝的碾压加工装置 Download PDF

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Publication number
WO2020015564A1
WO2020015564A1 PCT/CN2019/095416 CN2019095416W WO2020015564A1 WO 2020015564 A1 WO2020015564 A1 WO 2020015564A1 CN 2019095416 W CN2019095416 W CN 2019095416W WO 2020015564 A1 WO2020015564 A1 WO 2020015564A1
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rolling
electrode wire
frame
take
wire
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PCT/CN2019/095416
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English (en)
French (fr)
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洪韶谦
裴琦
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宁波正锦和精密贸易有限公司
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Publication of WO2020015564A1 publication Critical patent/WO2020015564A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F19/00—Metallic coating of wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F23/00—Feeding wire in wire-working machines or apparatus
    • 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
    • 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
    • B23H11/00—Auxiliary apparatus or details, not otherwise provided for
    • B23H11/006—Electrical contacts or wires
    • 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
    • B23H7/08—Wire electrodes
    • B23H7/10—Supporting, winding or electrical connection of wire-electrode

Definitions

  • the utility model relates to the field of electrode wire processing, in particular to a rolling processing device for electrode wire for electric discharge machining.
  • Electrode wires such as brass wires and zinc-coated wires will soon occupy the main position of wire cutting electrode wire materials.
  • the electrode wire has undergone a conversion from the ordinary brass electrode wire to the coated electrode wire.
  • Galvanized electrode wire for slow-moving wire cutting.
  • the core material is ordinary brass, and the outside is plated with zinc. Due to the gasification of zinc in the cutting process, the discharge of this electrode wire will be relatively stable, and the cutting surface Will be smoother than ordinary brass wire.
  • the processing rate must be considered; often brass wires containing 35% or more zinc, although the cost is reduced, the processing rate has also become relatively low. .
  • the electrode wire for electrical discharge machining is covered with a layer of zinc oxide on the outside of the brass core material, which can protect it and form irregular cracks after surface treatment. On the one hand, it can promote the lubricating fluid to enter the mold and the electrode during the wire drawing process. The processing interface of the wire improves the yield of wire drawing. On the other hand, the crack is combined with the cutting fluid during the cutting process to improve the ability of the electrode wire to carry cutting fluid, which is conducive to improving cutting efficiency, processing yield and cutting quality.
  • the related reports of such crack generating devices are still few in related fields.
  • the technical problem to be solved by the present invention is to provide a new device for forming the above-mentioned cracks on the surface of the electrode wire by laminating processing.
  • the present invention provides a rolling processing device for an electrode wire for electric discharge machining, which includes a bell jar furnace and a rolling device in the bell jar furnace.
  • the utility model is characterized in that the bell jar furnace has a heating furnace cavity.
  • the heating furnace cavity is provided with a pay-off rack, a rolling device and a pay-off rack.
  • the pay-off rack and a pay-off rack are located on both sides of the rolling device.
  • the pay-off rack and pay-off rack are installed on a flat support.
  • the axis of rotation of the wire frame and the take-up frame is set to be vertical and parallel to each other.
  • the rolling device includes at least two pairs of rolling wheels installed on the rolling support.
  • the rolling wheels are arranged in pairs on the ground and the directions of rotation are opposite.
  • a rolling space for a single electrode wire is formed between the rolling wheels.
  • the rolling wheel is in contact with and rolled on the surface of the electrode wire while the rolling wheel is rotating.
  • the electrode wire to be processed is wound on a pay-off rack and passed through the roller of the rolling device.
  • the pressing wheel performs surface processing and reaches the take-up frame to be coiled and taken up.
  • the rotating shaft of the pay-off rack, the electrode wire walking path, and the rotating shaft of the pay-off rack are all located in the same plane.
  • the bell jar furnace is provided with a conductive coil surrounding the outside of the closed cavity, and an alternating voltage is provided to the conductive coil while heating.
  • a wire guide wheel is also provided.
  • the wire guide wheels are provided in two and are respectively located between the rolling device and the pay-off frame and between the rolling device and the take-up frame.
  • the electrode wire passes through the wire guide wheel horizontally.
  • the ground passes through the rolling device.
  • each rolling wheel has the same radius and the rotation axes are parallel to each other.
  • irregular protrusions are provided on the periphery of the roller.
  • the rotation of the rollers is driven by a motor.
  • the rolling processing device of the electrode wire for electric discharge processing of the utility model has the advantages of simple and convenient operation and high production efficiency, can realize accurate positioning of the electrode wire, stable wire transport, and can form a crack layer on the surface layer of the electrode wire, which helps to improve the electrode wire. Processing efficiency and processing quality.
  • FIG. 1 is a schematic structural diagram of an embodiment of a rolling processing apparatus for an electrode wire for electrical discharge machining according to the present invention.
  • FIG. 2 is a schematic structural view of another embodiment of a rolling processing device for an electrode wire for electric discharge machining according to the present invention
  • 1 bell furnace In the picture, 1 bell furnace, 2 heating furnace cavity, 3 pay-off rack, 4 plane support, 5 take-up rack, 6 rolling device, 7 rolling wheel, 8 rolling support, 9 electrode wire, 10 rows of wire guide wheel.
  • a specific embodiment of a rolling processing device for an electrode wire for electric discharge processing includes a bell jar furnace 1 and a rolling device 6 in the bell jar furnace 1.
  • the bell jar furnace 1 has heating Furnace chamber 2, in the heating furnace chamber 2, a pay-off rack 3, a rolling device 6 and a pay-off rack 5 are provided, the pay-off rack 3 and the pay-off rack 5 are located on both sides of the rolling device 6, and the pay-off rack 3
  • Both the take-up frame 5 and the take-up frame 5 are mounted on a flat support 4, the rotating shafts of the take-up frame 3 and the take-up frame 5 are set in a vertical direction and parallel to each other.
  • the rolling device 6 includes at least two pairs of Rolling rollers 7 are arranged in pairs on the top and bottom in opposite directions, and each pair of rolling wheels 7 forms a rolling space for a single electrode wire 9.
  • each pair of rolling wheels 7 forms a rolling space for a single electrode wire 9.
  • the electrode wire 9 to be processed is coiled on the pay-off frame 3 and passed through the rolling wheel 7 of the rolling device 6 for surface processing.
  • the rotating shaft of the pay-off rack 3, the walking path of the electrode wire 9, and the rotating shaft of the take-up rack 5 are all located in the same plane.
  • each of the rolling wheels 7 has the same radius and the rotation axes are parallel to each other.
  • An irregular protruding texture is provided on the periphery of the rolling wheels 7, and the rotation of the rolling wheels 7 is driven by a motor. Under the action of the rolling wheel 7, a crack or a small pit is formed on the surface of the electrode wire.
  • bell jar furnace The function of bell jar furnace is to provide higher temperature (230 ⁇ 520 °C), use the internal hot air flow to melt the zinc but not the copper, and gradually increase the temperature while processing the rolling device, so that the copper and zinc form a composite coating. Finally, the electrode wire product is obtained.
  • the bell jar furnace is provided with a conductive coil that surrounds the outside of the closed cavity. When the heating is performed, an alternating voltage is provided to the conductive coil to supplement the heat. After heating, rolling, and stretching, the core material of the electrode wire is continuously thinned and stretched, so that the surface metal composition is pressed into the core layer, and after heat treatment, it is integrated with the core material metal to improve performance.
  • wire guide wheels 10 are further provided, and the wire guide wheels 10 are arranged in two pairs and are respectively located at Between the rolling device 6 and the pay-off frame 3 and between the rolling device 6 and the take-up frame 5, the electrode wire passes through the rolling device 6 horizontally through the wire guide wheel 10.
  • the raw electrode wire when working, the raw electrode wire is located on the pay-off rack on the left.
  • the lower rolling wheel rotates clockwise and the upper rolling wheel rotates in the opposite direction.
  • the rolled electrode wire also conducts the electrode wire to the right side of the take-up frame.
  • the electrode After the wire is heated, rolled, and taken up, the wire is finally coiled on the take-up frame.
  • the take-up frame is also driven by the motor to rotate along the rotation axis to take up the electrode wire.
  • the rolling processing device of the electrode wire for electric discharge processing of the utility model has the advantages of simple and convenient operation and high production efficiency, can realize accurate positioning of the electrode wire, stable wire transport, and can form a crack layer on the surface layer of the electrode wire, which helps to improve the electrode wire. Processing efficiency and processing quality.

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

Abstract

一种放电加工用电极丝的碾压加工装置，包括钟罩炉（1）和碾压装置（6），钟罩炉（1）内设有放线架（3）、碾压装置（6）和收线架（5），放线架（3）和收线架（5）分别位于碾压装置（6）的两侧，放线架（3）和收线架（5）的转轴设为竖直方向且互相平行，碾压装置（6）包括至少两对安装在碾压支架（8）上的碾压轮（7），碾压轮（7）成对地上下设置且转动方向相反，每对碾压轮（7）之间形成单根电极丝（9）的碾压空间，碾压轮（7）转动的同时在电极丝（9）的表面接触、滚压。放电加工用电极丝的碾压加工装置，操作简单方便、生产效率高。

Description

一种放电加工用电极丝的碾压加工装置 技术领域
本实用新型涉及电极丝加工领域，尤其涉及一种放电加工用电极丝的碾压加工装置。
背景技术
近年来，机械加工技术日新月异，线切割放电加工作为一种特别的精密机械加工技术也得到了迅速发展。线切割技术的发展其重要的一部分依赖于电极丝技术的发展。拥有性能优良的电极丝才能进行高效地加工，出产高品质、高精度的产品。自20世纪七八十年代镀锌电极丝发明以来，市场上先后出现了普通黄铜电极丝、镀锌电极丝、钼丝、钨丝、复合丝(里层为钢丝，外表为铜等)等各种各样的电极丝。目前常用电极丝有钼丝(Φ0.08～Φ0.2mm)、钨丝(Φ0.03～Φ0.1mm)、黄铜丝(Φ0.1～Φ0.3mm)和涂层电极丝(Φ0.1～Φ0.3mm)等。慢走丝线切割是国际线切割加工的主流方向，所用电极丝如黄铜丝、涂锌丝等不久将占据线切割电极丝材料品种的主要地位。
随着材料加工技术及机械加工技术的不断进步，电极丝经历了从普通黄铜电极丝到镀层电极丝的使用转换。慢走丝线切割用镀锌电极丝，一般地，其芯材为普通黄铜，外面镀一层锌，由于锌在切割过程中的气化作用，这种电极丝的放电会比较稳定，切割表面会比普通黄铜丝光滑。而对于黄铜电极丝其合金成分，不仅要考虑经济成本，还需要考虑其加工速率；往往含锌35％及以上的黄铜线，虽然降低了成本，但相对地加工速率也变得较低。
放电加工用电极丝由于在黄铜的芯材外覆盖有一层氧化锌，能够起到保护作用，经表面处理形成不规则的龟裂，一方面可以在拔丝加工过程中促进润滑液进入模具与电极丝的加工界面，提高拔丝成品率，另一方面在切割过程中通过该龟裂与切割液配合，提高电极丝携带切削液的能力，从而有利于提高切割效率，提高加工成品率和切割质量，而这类生成龟裂的装置的相关报道在相关领域内仍然较少。
因此，本领域的技术人员致力于开发一种通过碾压加工在电极丝表面形成上述龟裂的装置。
实用新型内容
有鉴于现有技术的上述缺陷，本实用新型所要解决的技术问题是提供一种通过碾压加工在电极丝表面形成上述龟裂的新型装置。
为实现上述目的，本实用新型提供了一种放电加工用电极丝的碾压加工装置，包括钟罩炉和钟罩炉内的碾压装置，其特征在于，钟罩炉具有加热炉腔，在加热炉腔内设有放线架、碾压装置和收线架，放线架和收线架分别位于碾压装置的两侧，放线架和收线架均安装在一 平面支架上，放线架和收线架的转轴设为竖直方向且互相平行，碾压装置包括至少两对安装在碾压支架上的碾压轮，碾压轮成对地上下设置且转动方向相反，每对碾压轮之间形成单根电极丝的碾压空间，碾压轮转动的同时在电极丝的表面接触、滚压，待加工电极丝盘绕在放线架上并经传输经过碾压装置的碾压轮进行表面加工，到达收线架经盘绕收线。
进一步地，放线架的转轴、电极丝行走路径、收线架的转轴均位于同一平面内。
进一步地，钟罩炉设有环绕于封闭腔体外的导电线圈，于实施加热的同时对导电线圈提供交流电压。
进一步地，还设有行丝导轮，行丝导轮设置为两个且分别位于碾压装置与放线架之间及碾压装置与收线架之间，电极丝经行丝导轮水平地经过碾压装置。
进一步地，各个碾压轮的半径相同且转轴相互平行。
更进一步地，碾压轮的外围设有不规则的突起纹路。
更进一步地，碾压轮的转动均由电机带动。
本实用新型的放电加工用电极丝的碾压加工装置，操作简单方便、生产效率高，可实现电极丝准确定位、运丝平稳，使电极丝表层形成龟裂层，有助于提高电极丝的加工效率和加工质量。
以下将结合附图对本实用新型的构思、具体结构及产生的技术效果作进一步说明，以充分地了解本实用新型的目的、特征和效果。
附图说明
图1是本实用新型的放电加工用电极丝的碾压加工装置的一个实施例的结构示意图。
图2是本实用新型的放电加工用电极丝的碾压加工装置的另一个实施例的结构示意图
图中，1钟罩炉，2加热炉腔，3放线架，4平面支架，5收线架，6碾压装置，7碾压轮，8碾压支架，9电极丝，10行丝导轮。
具体实施方式
如图1所示为本实用新型提供的放电加工用电极丝的碾压加工装置的一个具体实施例，包括钟罩炉1和钟罩炉1内的碾压装置6，钟罩炉1具有加热炉腔2，在加热炉腔2内设有放线架3、碾压装置6和收线架5，放线架3和收线架5分别位于碾压装置6的两侧，放线架3和收线架5均安装在一平面支架4上，放线架3和收线架5的转轴设为竖直方向且互相平行，碾压装置6包括至少两对安装在碾压支架8上的碾压轮7，碾压轮7成对地上下设置且转动方向相反，每对碾压轮7之间形成单根电极丝9的碾压空间，碾压轮7转动的同时在电极丝9的表面接触、滚压，待加工电极丝9盘绕在放线架3上并经过碾压装置6的碾压轮7进行 表面加工，到达收线架5经盘绕收线。
为使电极丝传输过程中的平直，放线架3的转轴、电极丝9行走路径、收线架5的转轴均位于同一平面内。
优选地，各个碾压轮7的半径相同且转轴相互平行，碾压轮7的外围设有不规则的突起纹路，碾压轮7的转动均由电机带动。在碾压轮7的作用下，电极丝表面的形成龟裂纹或小坑洞。
钟罩炉的作用是提供较高的温度(230～520℃)，利用内部热气流，使锌融化而铜不融化，在碾压装置加工的同时逐渐升高温度，使铜和锌形成复合镀层，最终得到电极丝产品。钟罩炉设有环绕于封闭腔体外的导电线圈，于实施加热的同时对导电线圈提供交流电压，以补充发热。经过加热、碾压和收线的拉伸作用，电极丝的芯材不断变细拉长，使表层金属组合物被压入芯层，热处理后与芯材金属融为一体，性能得到提高。
如图2所示，在本实用新型提供的放电加工用电极丝的碾压加工装置的另一个实施例中，还设有行丝导轮10，行丝导轮10设置为两对且分别位于碾压装置6与放线架3之间及碾压装置6与收线架5之间，电极丝经行丝导轮10水平地经过碾压装置6。
如图1和图2所示，工作时，未加工的电极丝位于左边的放线架上，先引导电极丝穿过碾压轮之间，开动碾压装置，电机驱动上下碾压轮相对转动，其中下方的碾压轮顺时针转动而上方的碾压轮转动方向相反，碾压电极丝同时也将电极丝向右侧的收线架方向传导，在钟罩炉的加温环境中，电极丝经加热、碾压和收线拉伸，最终盘绕在收线架上，收线架也在电机驱动下沿转轴转动，将电极丝收起。
本实用新型的放电加工用电极丝的碾压加工装置，操作简单方便、生产效率高，可实现电极丝准确定位、运丝平稳，使电极丝表层形成龟裂层，有助于提高电极丝的加工效率和加工质量。
以上详细描述了本实用新型的较佳具体实施例。应当理解，本领域的普通技术人员无需创造性劳动就可以根据本实用新型的构思作出诸多修改和变化。因此，凡本技术领域中技术人员依本实用新型的构思在现有技术的基础上通过逻辑分析、推理或者有限的实验可以得到的技术方案，皆应在由权利要求书所确定的保护范围内。

Claims (7)

  1. 一种放电加工用电极丝的碾压加工装置，包括钟罩炉和钟罩炉内的碾压装置，其特征在于，钟罩炉具有加热炉腔，在加热炉腔内设有放线架、碾压装置和收线架，放线架和收线架分别位于碾压装置的两侧，放线架和收线架均安装在一平面支架上，放线架和收线架的转轴设为竖直方向且互相平行，碾压装置包括至少两对安装在碾压支架上的碾压轮，碾压轮成对地上下设置且转动方向相反，每对碾压轮之间形成单根电极丝的碾压空间，碾压轮转动的同时在电极丝的表面接触、滚压，待加工电极丝盘绕在放线架上并经传输经过碾压装置的碾压轮进行表面加工，到达收线架经盘绕收线。
  2. 如权利要求1所述的放电加工用电极丝的碾压加工装置，其特征在于，放线架的转轴、电极丝行走路径、收线架的转轴均位于同一平面内。
  3. 如权利要求2所述的放电加工用电极丝的碾压加工装置，其特征在于，钟罩炉设有环绕于封闭腔体外的导电线圈，于实施加热的同时对导电线圈提供交流电压。
  4. 如权利要求3所述的放电加工用电极丝的碾压加工装置，其特征在于，还设有行丝导轮，行丝导轮设置为两个且分别位于碾压装置与放线架之间及碾压装置与收线架之间，电极丝经行丝导轮水平地经过碾压装置。
  5. 如权利要求4所述的放电加工用电极丝的碾压加工装置，其特征在于，各个碾压轮的半径相同且转轴相互平行。
  6. 如权利要求5所述的放电加工用电极丝的碾压加工装置，其特征在于，碾压轮的外围设有不规则的突起纹路。
  7. 如权利要求6所述的放电加工用电极丝的碾压加工装置，其特征在于，碾压轮的转动均由电机带动。
PCT/CN2019/095416 2018-07-18 2019-07-10 一种放电加工用电极丝的碾压加工装置 WO2020015564A1 (zh)

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CN208556231U (zh) * 2018-07-18 2019-03-01 萨摩亚商正锦和金属股份有限公司 一种放电加工用电极丝的碾压加工装置

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