CN202527840U - Direct-current arc strike cutting torch for air plasma cutting machine - Google Patents
Direct-current arc strike cutting torch for air plasma cutting machine Download PDFInfo
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- CN202527840U CN202527840U CN2012201999245U CN201220199924U CN202527840U CN 202527840 U CN202527840 U CN 202527840U CN 2012201999245 U CN2012201999245 U CN 2012201999245U CN 201220199924 U CN201220199924 U CN 201220199924U CN 202527840 U CN202527840 U CN 202527840U
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Abstract
The utility model provides a direct-current arc strike cutting torch for an air plasma cutting machine. The cutting torch comprises a fixed iron core, a movable iron core, an electrode and a spray nozzle, wherein the movable iron core is arranged below the fixed iron core, and a gap is reserved between the fixed iron core and the movable iron core; springs are arranged between the fixed iron core and the movable iron core; inductance coils are wound on the fixed iron core; one end of each inductance coil is connected with the electrode; the electrode is connected with the movable iron core; the spray nozzle is sleeved at the bottom of the electrode and is connected to the fixed iron core; and an insulating sleeve is arranged on the spray nozzle. The direct-current arc strike cutting torch is simple in structure and high in automated degree; an electric arc is generated under the condition that high-frequency and high-voltage current is not needed to be loaded between the electrode and the spray nozzle, and the electric arc can be ignited only by loading direct-current voltage outputted by a cutting power supply, so that interference to other electronic equipment is avoided.
Description
Technical field
The utility model relates to a kind of cutting torch that is used for the CUT striking, belongs to the CUT technical field.
Background technology
At present, plasma arc cutting generally has two kinds of striking modes:
1. contact: promptly being attached on the workpiece (it is anodal to be connected cutting power supply) with the nozzle of electrode insulation; Be added to high-frequency high-voltage current on the electrode of joining power negative terminal then; Make electrode ejection electric arc, electric arc forms plasma arc under voltage, air pressure, magnetic field effect, keep plasma arc smooth combustion through big electric current; Raise nozzle (avoiding red-hot workpiece defective nozzle) then slightly, begin cutting.This cutting mode is applicable to little electric current (low power cutting machine) more.
2. transferred arc formula (arc maintenance formula): promptly be connected to the cutting power supply positive pole on the nozzle through certain resistance and relay switch; Be added to high-frequency high-voltage current between electrode and nozzle earlier, make to form electric arc between electrode and nozzle (because the resistance current limliting is arranged, electric arc is less; Be commonly called as little arc); On the workpiece of nozzle near direct joining power positive pole, just form the bigger electric arc of energy between electrode and workpiece then, electric arc is compressed the back and forms plasma arc; And nozzle was disconnected with connecting of positive source, began cutting.
More than two kinds of striking modes have a common ground: the air gap that promptly has 1.5mm to 3mm between electrode and nozzle; The DC voltage of plasma arc cutting power supply output is unusual less than 300 volts according to output current, and 300 volts can not produce electric arc on the L of the air gap.Therefore need on the L of the air gap, to produce electric arc with high-frequency high-voltage current earlier, then begin cutting.High-frequency high-voltage current has than intense radiation, other electronic equipment is produced disturb easily.
Summary of the invention
The utility model is to the problem that existing CUT striking technology exists, and can not produce the direct current striking air plasma cutter cutting torch that disturbs to other electronic equipment when a kind of simple in structure, striking is provided.
The direct current striking air plasma cutter cutting torch of the utility model, adopt following technical scheme:
This cutting torch comprises secured core, movable core, electrode and nozzle, and movable core is arranged on the secured core below; Has the gap between the two; Be provided with spring between movable core and the secured core, be wound with inductance coil on the secured core, an end of inductance coil is connected with electrode; Electrode is connected with movable core, and nozzle cage is contained in the bottom of electrode and is connected on the secured core.
Nozzle is provided with insulation sleeve.
Above-mentioned cutting torch electrode before connecting cutting power supply contacts with nozzle; During striking, workpiece is connected with the positive pole of cutting power supply, when connecting cutting power supply and nozzle and contact with workpiece; The cutting power supply output current moves movable core in the magnetic field that inductance coil produces; Movable core drives electrode simultaneously and moves, and the moment in gap appears in electrode and nozzle, and small gap very easily produces electric arc; Voltage between electrode and nozzle is elevated to killer voltage by zero simultaneously, and electric arc forms plasma arc under voltage, air pressure, magnetic field effect.
The utility model is simple in structure, and automaticity is high, and the generation of electric arc does not need high-frequency high-voltage current to be loaded between electrode and the nozzle, and the DC voltage that only loads cutting power supply output can be realized the electric arc that ignites, and has avoided other electronic equipment is produced interference.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Wherein: 1, secured core, 2, movable core, 3, inductance coil, 4, spring, 5, line, 6, electrode, 7, interior cover, 8, overcoat, 9, insulation sleeve, 10, nozzle, 11, sheath, 12, compressed air inlet.
The specific embodiment
As shown in Figure 1, the direct current striking air plasma cutter cutting torch of the utility model mainly comprises secured core 1, movable core 2, electrode 6 and nozzle 10.Be provided with a blind hole inner chamber in the secured core 1, movable core 2 is sleeved in the blind hole inner chamber of secured core 1, has the gap of 1.5mm to 3mm between the blind hole inner chamber bottom surface of the upper surface of movable core 2 and secured core 1.Be provided with spring 4 between movable core 2 and the secured core 1.Be wound with inductance coil 3 on the secured core 1, an end of inductance coil 3 is connected with electrode 6 through line 5, and the other end is connected with the cutting power supply negative pole when using.Electrode 6 is connected with movable core 2, cover 7 in being set with on the electrode 6.The bottom of secured core 1 is through the overcoat 8 that has been threaded, and overcoat 8 is provided with compressed air inlet 12, has certain interval between interior cover 7 and the overcoat 8, so that compressed air passes through.Nozzle 10 is sleeved on the bottom of electrode 6 and is connected on the overcoat 8 through sheath 11, and sheath 11 and overcoat 8 are provided with insulation sleeve 9 through being threaded between nozzle 10 tops and the overcoat 8.
When adopting contact starting, workpiece is connected with the positive pole of cutting power supply, during the access failure cutting power supply; Electrode 6 contacts with nozzle 10 under the effect of spring 4; When connecting cutting power supply and nozzle 10 and contact with workpiece, formation loop, cutting power supply outside, cutting power supply output short circuit current; Short circuit current is through inductance coil 3 (size of current equals given cutting current); The magnetic field that inductance coil 3 produces is moved movable core 2 in the inner chamber of secured core 1, movable core 2 drives electrode 6 simultaneously and moves, and makes the electrode 6 and the gap of nozzle 10 increase to 1.5mm to 3mm by zero.The moment in gap appears in electrode 6 and nozzle 10, and small gap very easily produces electric arc, and the voltage that while electrode 6 and nozzle are 10 is elevated to killer voltage by zero, and electric arc forms plasma arc under voltage, air pressure, magnetic field effect.The generation of electric arc does not need high-frequency high-voltage current to be loaded between electrode 6 and the nozzle 10, and the DC voltage that only adds cutting power supply output can be realized the electric arc that ignites.Compressed air is got into by the compressed air inlet on the overcoat 8 12; And in the cavity by the entering of the gap between interior cover 7 and the overcoat 8 sheath 11; Get between electrode 6 and the nozzle 10 through the aperture on the insulation sleeve 9 (not drawing among the figure) on the one hand then; Welding slag is sprayed, on the one hand nozzle 10 is cooled off.
When adopting transferred arc formula (arc maintenance formula) striking; Need the cutting power supply positive pole be connected on the nozzle 10 through transferred arc current-limiting resistance and relay switch according to the principle of existing transferred arc formula (arc maintenance formula) striking; On the workpiece of nozzle 10 near direct connection cutting power supply positive pole, process thereafter is the same with above-mentioned contact starting then.
Claims (2)
1. a direct current striking air plasma cutter cutting torch comprises secured core, movable core, electrode and nozzle, it is characterized in that: movable core is arranged on the secured core below; Has the gap between the two; Be provided with spring between movable core and the secured core, be wound with inductance coil on the secured core, an end of inductance coil is connected with electrode; Electrode is connected with movable core, and nozzle cage is contained in the bottom of electrode and is connected on the secured core.
2. direct current striking air plasma cutter cutting torch according to claim 1, it is characterized in that: said nozzle is provided with insulation sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201999245U CN202527840U (en) | 2012-05-07 | 2012-05-07 | Direct-current arc strike cutting torch for air plasma cutting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201999245U CN202527840U (en) | 2012-05-07 | 2012-05-07 | Direct-current arc strike cutting torch for air plasma cutting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202527840U true CN202527840U (en) | 2012-11-14 |
Family
ID=47129049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201999245U Expired - Fee Related CN202527840U (en) | 2012-05-07 | 2012-05-07 | Direct-current arc strike cutting torch for air plasma cutting machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202527840U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108296617A (en) * | 2018-03-07 | 2018-07-20 | 上海威特力焊接设备制造股份有限公司 | Regulating current device and method for plasma cutting machine |
| CN108406065A (en) * | 2018-05-15 | 2018-08-17 | 常州信息职业技术学院 | A kind of electronic equipment plasma cutting gun operation handlebar |
| CN114025463A (en) * | 2021-12-16 | 2022-02-08 | 合肥爱普利等离子体有限责任公司 | Arc striking device and arc striking method for arc plasma torch |
-
2012
- 2012-05-07 CN CN2012201999245U patent/CN202527840U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108296617A (en) * | 2018-03-07 | 2018-07-20 | 上海威特力焊接设备制造股份有限公司 | Regulating current device and method for plasma cutting machine |
| CN108296617B (en) * | 2018-03-07 | 2023-06-20 | 上海威特力焊接设备制造股份有限公司 | Current regulating device and method for plasma cutting machine |
| CN108406065A (en) * | 2018-05-15 | 2018-08-17 | 常州信息职业技术学院 | A kind of electronic equipment plasma cutting gun operation handlebar |
| CN108406065B (en) * | 2018-05-15 | 2020-07-03 | 常州信息职业技术学院 | Plasma cutting gun operating handle for electronic equipment |
| CN114025463A (en) * | 2021-12-16 | 2022-02-08 | 合肥爱普利等离子体有限责任公司 | Arc striking device and arc striking method for arc plasma torch |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121114 Termination date: 20130507 |