CN1038660C - High temperature resistance anti-oxidation electrode for air plasma cutter - Google Patents
High temperature resistance anti-oxidation electrode for air plasma cutter Download PDFInfo
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- CN1038660C CN1038660C CN94110655A CN94110655A CN1038660C CN 1038660 C CN1038660 C CN 1038660C CN 94110655 A CN94110655 A CN 94110655A CN 94110655 A CN94110655 A CN 94110655A CN 1038660 C CN1038660 C CN 1038660C
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- electrode
- zirconium
- high temperature
- temperature resistance
- resistance anti
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Abstract
The present invention relates to a high temperature resistance anti-oxidation electrode for an air plasma cutter, which is composed of a metal zirconium tube, and a zirconium oxide core rod and a copper core rod which are arranged in the zirconium tube. The high temperature resistance anti-oxidation electrode can be used for continuously cutting metal for a long time, the service life is longer than that of a precious hafnium electrode, and the manufacturing cost approaches to that of a commonly used zirconium electrode.
Description
The present invention relates to a kind of high temperature resistance anti-oxidation electrode for air plasma cutter.
Fast with air plasma cutter cutting metal speed, the thermal efficiency is high, slot is narrow, cutting thickness is big, and it is convenient inexpensive to make work gas with air, but, reach more than 2,000 degree centigrade at the electric arc near zone during electrode work, be subjected to the oxide etch effect of high-temperature oxygen or oxonium ion and washing away of high velocity air simultaneously, general conductor material is difficult to bear.At present the industrial anti-oxidant high-melting-point electrode that is applied to air plasma cutter is bar-shaped hafnium and zirconium, and the former costs an arm and a leg and only is used for special field boundary and closes.The compact zirconia rete that the very fast formation one deck of discharge end parts high temperature conducts electricity down during zirconium electrode work has been protected the not further oxidation of zirconium in the film.But because the fusing point of zirconium is 1850 ℃, be bumped in the cooling copper sheathing although the zirconium electrode rod is latter half of, the high heat that accumulates in discharge end parts also can make the interior zirconium fusion of zirconia rete, local shedding under the high-speed gas eddy current effect, form rhegmalypt, rhegmalypt generally concentrates on the center of electrode bar discharge end parts.Along with the prolongation of working time, pit is deepened, and diameter increases.Other fusing point materials such as tungsten, molybdenum etc. in air under the high temperature rapidly voloxidation fall, can not be used for such use, the oxidation resistant compound of face high-melting-point is generally insulator or semiconductor, having only at high temperature as zirconia or doped stannum oxide etc., resistance just drops to available level, resistance is very big during room temperature, can not the starting the arc.
The objective of the invention is to overcome that above-mentioned electrode costs an arm and a leg or the low short defective of life-span of fusing point, utilize cheaply material and technology to make long-life high temperature resistance anti-oxidation electrode for air plasma cutter.
High temperature resistance anti-oxidation electrode for air plasma cutter is characterized in that being made up of zirconium pipe and the zirconia ceramics plug and the copper plug that are contained in the zirconium pipe.
The invention has the advantages that need not expensive hafnium, only adopt cheap zirconium, zirconia and copper product through assembling, made full use of the anti-oxidant and high-temperature electric conduction of the electric conductivity of zirconium and copper and heat conductivity and zirconic high-melting-point, working life substantially exceeds the hafnium electrode that generally uses at present, and the life-span surpasses the hafnium electrode.
Accompanying drawing is a structural representation of the present invention, 1 is the zirconia ceramics rod among the figure, 2 is the zirconium pipe, and 3 is copper rod, and the external diameter of zirconium pipe 2 is the 3-10 millimeter, wall thickness is the 0.5-3 millimeter, length is 20 millimeters, and the length of zirconia ceramics plug 1 is 5 millimeters, and the length of copper plug 3 is 15 millimeters, both length sums equal the length of zirconium pipe 2, with zirconium pipe 2 interference fit together.Zirconium pipe 2 electric conductivity are good during room temperature, are easy to the starting the arc, and ceramic rod 1 end is heated to very soon more than 1000 ℃ and becomes conductor after the starting the arc, electric arc arc root around rotate under the blast effect and shift to the central area, thereby avoided the scaling loss of zirconium pipe 2.Because the fusing point of zirconia ceramics rod 1 is much higher than zirconium and is higher than hafnium, has the extremely strong non-oxidizability that has simultaneously, thereby can long time continuous working, the scaling loss amount of itself is but very little.Zirconium pipe 2 just is subjected to temperatures involved in the short time of the starting the arc, be rotated cold wind after the operate as normal all around and surround, and a part of heat is taken away by cold wind, and a part of heat imports the copper electrode seat backward.The effect of copper rod 3 is to reduce resistance to increase the heat conduction, thereby has further protected the zirconium pipe, has prolonged the life-span of electrode.
Claims (3)
1, a kind of high temperature resistance anti-oxidation electrode for air plasma cutter is characterized in that by the zirconium pipe, and the zirconia ceramics plug and the copper plug that are contained in the zirconium pipe are formed.
2, electrode according to claim 1, the external diameter that it is characterized in that the zirconium pipe is 3～10mm, wall thickness 0.5～3mm, length is 20mm.
3, electrode according to claim 1 and 2, the length that it is characterized in that the zirconia ceramics rod is 5mm, the length that the copper core is held in both hands is 15mm, with zirconium pipe interference fit together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94110655A CN1038660C (en) | 1994-06-06 | 1994-06-06 | High temperature resistance anti-oxidation electrode for air plasma cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94110655A CN1038660C (en) | 1994-06-06 | 1994-06-06 | High temperature resistance anti-oxidation electrode for air plasma cutter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1113844A CN1113844A (en) | 1995-12-27 |
| CN1038660C true CN1038660C (en) | 1998-06-10 |
Family
ID=5034601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94110655A Expired - Fee Related CN1038660C (en) | 1994-06-06 | 1994-06-06 | High temperature resistance anti-oxidation electrode for air plasma cutter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1038660C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113038680B (en) * | 2021-02-05 | 2022-06-28 | 浙江大学 | Arc ablation resistant electrode structure and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2044201U (en) * | 1989-01-17 | 1989-09-13 | 核工业第六研究所 | Plasma cutting torch |
| EP0465109A2 (en) * | 1990-06-26 | 1992-01-08 | Daihen Corporation | Electrode for use in plasma arc working torch |
| CN2133401Y (en) * | 1992-08-29 | 1993-05-19 | 华敖度 | Low-voltage generating arc plasma cutting blowpipe |
-
1994
- 1994-06-06 CN CN94110655A patent/CN1038660C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2044201U (en) * | 1989-01-17 | 1989-09-13 | 核工业第六研究所 | Plasma cutting torch |
| EP0465109A2 (en) * | 1990-06-26 | 1992-01-08 | Daihen Corporation | Electrode for use in plasma arc working torch |
| CN2133401Y (en) * | 1992-08-29 | 1993-05-19 | 华敖度 | Low-voltage generating arc plasma cutting blowpipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1113844A (en) | 1995-12-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |