CN105376921A - Inner cavity powder supply tungsten needle for plasma processing - Google Patents
Inner cavity powder supply tungsten needle for plasma processing Download PDFInfo
- Publication number
- CN105376921A CN105376921A CN201510912451.7A CN201510912451A CN105376921A CN 105376921 A CN105376921 A CN 105376921A CN 201510912451 A CN201510912451 A CN 201510912451A CN 105376921 A CN105376921 A CN 105376921A
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- CN
- China
- Prior art keywords
- tungsten
- needle
- protective cover
- feed orifice
- overcoat
- 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.)
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/26—Plasma torches
- H05H1/32—Plasma torches using an arc
- H05H1/42—Plasma torches using an arc with provisions for introducing materials into the plasma, e.g. powder, liquid
Abstract
The invention relates to an inner cavity powder supply tungsten needle for plasma processing. In the technical scheme, the tungsten needle (2) is arranged in an outer sleeve (3) and a protection cover (1) by a tungsten needle holder (4), a needle head of the tungsten needle (2) is arranged at a nozzle of the protection cover (1), the tungsten needle (2) is a whole composed of a needle rod and the needle head, the needle rod is provided with a main feeding hole (5), an annular groove is processed at a part where the needle rod and the needle head are combined, 2 to 6 auxiliary feeding holes (7) are symmetrically arranged at the center of the part where the needle rod and the needle head are combined, and an included angle between the central line of the auxiliary feeding holes (7) and the central line of the needle rod is 15 to 30 degrees, the central line of the auxiliary feeding holes (7) and the bottom line of the inner wall of the needle rod are intersected, and the hole walls of the auxiliary feeding holes (7) are tangential to the outer side wall of the annular groove. The inner cavity powder supply tungsten needle for plasma processing has the characteristics of high working efficiency, long service lifetime and high plasma surface processing quality, the heating time of alloy powder can be prolonged, and the moisture in the powder can be reduced or removed.
Description
Technical field
The invention belongs to plasma processing equipment technical field.Be specifically related to a kind of inner chamber of plasma process for powder tungsten pin.
Background technology
In plasma process process, be that metal dust is coated on substrate surface, plasma processing equipment tungsten pin is solid cylinder and circular cone assembly.Moisture can be brought in molten coating and produce quality problems by this equipment; Another kind of plasma processing equipment is sprayed into from spray gun protective cover in plasma flow field by metal dust, and its tungsten pin is also solid cylinder and circular cone assembly.The shortcoming of above-mentioned tungsten pin is that the heating process of metal dust is shorter, is unfavorable for that powder spreads and then causes alloying component uneven in molten coating.
Summary of the invention
The present invention is intended to overcome prior art defect, and the inner chamber of plasma process of heating time that object is to provide that a kind of operating efficiency is high, long service life, plasma surface crudy are high and can extends alloy powder is for powder tungsten pin.
For achieving the above object, the technical solution used in the present invention is: described inner chamber comprises protective cover, tungsten pin, overcoat and tungsten needle holder for powder tungsten pin.Overcoat and protective cover are threaded, and tungsten pin is arranged in overcoat and protective cover by tungsten needle holder, and the syringe needle of tungsten pin is positioned at the nozzle of protective cover, and tungsten needle holder is positioned at the top of overcoat.
The entirety that the external shape of protective cover is made up of the round platform of bottom and the threaded post on top, the round platform bottom surface connected with threaded post has cannelure; The internal structure of protective cover is followed successively by hollow cylinder, hollow round table and manhole from top to bottom.
The entirety that tungsten pin is made up of shank and syringe needle; The upper end edge axis of shank is provided with bulk supply hole down near lower end, and syringe needle is inverted cone-shaped, and the junction of shank and syringe needle is processed with cannelure.The junction of shank and syringe needle is symmetrically provided with auxiliary feed orifice, the quantity of auxiliary feed orifice is 2 ~ 6, auxiliary feed orifice is uniformly distributed, the diameter of auxiliary feed orifice is 0.5 ~ 1.0mm, the angle of the auxiliary center line of feed orifice and the center line of shank is 15 ~ 30 °, the center line of auxiliary feed orifice is crossing with the inwall bottom line of shank, assists the lateral wall of the hole wall of feed orifice and described cannelure tangent; Bulk supply hole is communicated with the inner chamber of protective cover by auxiliary feed orifice.
The bottom of overcoat is provided with argon gas access port.
The center line of described protective cover, tungsten pin, overcoat and tungsten needle holder is same straight line.
Described tungsten needle holder is circular tube shaped, and tungsten needle holder external diameter is equal with the nominal size of the internal diameter of overcoat, and the internal diameter of tungsten needle holder is equal with the nominal size of the shank external diameter of tungsten pin.
The diameter in described bulk supply hole is 2.5 ~ 4mm.
Owing to adopting technique scheme, the present invention compared with prior art has following good effect:
1, the exit of auxiliary feed orifice is arranged on non-electric arc generating unit by the present invention, and namely the exit of auxiliary feed orifice is arranged on the cannelure place of tungsten pin, ensure that auxiliary feed orifice does not block because of arc erosion.The present invention is evenly distributed with 2 ~ 6 auxiliary feed orifice, ensure that alloy powder is discharged from the auxiliary feed orifice of tungsten pin smoothly, and uniform feeding.In addition, powder can heat and the moisture contained in powder is evaporated by the present invention, reduces the moisture maybe can eradicated in powder.
2, the present invention operationally, the tip portion of tungsten pin and surface of the work produce electric arc, argon gas is by the outlet of the cavity flow in the middle of overcoat and protective cover through protective cover, the plasma flow field of high-speed motion is jointly formed with electric arc, this flow field forms eddy current in the auxiliary feed orifice exit of tungsten pin and produces jet suction-operated, alloy powder is made easily to enter plasma flow field by the auxiliary feed orifice that diameter is less, high temperature when alloy powder imports from the bulk supply hole of tungsten pin and utilizes its work, powder is heated until melt, and enter plasma flow field by auxiliary feed orifice, the base material be melted with surface forms alloy-layer jointly, obtain the less and uniform alloy-layer of thickness.Base material also because the power relatively little and temperature rise distortion of heating is relatively low, significantly improves plasma surface crudy.
3, the present invention is through field experiment: on base material, define the alloy-layer that thickness is 0.75 ~ 1.25mm, processes substrate deformation that the base material temperature rise that causes causes within the scope of ± 0.03mm; Continuous operation was more than 32 minutes, and tungsten pin auxiliary feed orifice does not occur by the phenomenon of arc erosion.
Therefore, the present invention has the heating time that operating efficiency is high, long service life, plasma surface crudy are high, can extend alloy powder and the feature that the moisture contained in powder can be made to evaporate.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 is the partial enlarged drawing of tungsten pin 2 in Fig. 1.
Embodiment
Below in conjunction with accompanying drawing and instantiation, the invention will be further described, not large to scope restriction.
embodiment 1
A kind of inner chamber of plasma process is for powder tungsten pin.As shown in Figure 1, described inner chamber comprises protective cover 1, tungsten pin 2, overcoat 3 and tungsten needle holder 4 for powder tungsten pin.Overcoat 3 and protective cover 1 are threaded, and tungsten pin 2 is arranged in overcoat 3 and protective cover 1 by tungsten needle holder 4, and the syringe needle of tungsten pin 2 is positioned at the nozzle of protective cover 1, and tungsten needle holder 4 is positioned at the top of overcoat 3.
As shown in Figure 1, the entirety that the external shape of protective cover 1 is made up of the round platform of bottom and the threaded post on top, the round platform bottom surface connected with threaded post has cannelure; The internal structure of protective cover 1 is followed successively by hollow cylinder, hollow round table and manhole from top to bottom.
As shown in Figure 1, the entirety that is made up of shank and syringe needle of tungsten pin 2; The upper end edge axis of shank is provided with bulk supply hole 5 down near lower end, and syringe needle is inverted cone-shaped, and the junction of shank and syringe needle is processed with cannelure.As shown in Figure 2, the junction of shank and syringe needle is symmetrically provided with auxiliary feed orifice 7, the quantity of auxiliary feed orifice 7 is 4, auxiliary feed orifice 7 is uniformly distributed, the diameter of auxiliary feed orifice 7 is 0.8mm, the angle of the auxiliary center line of feed orifice 7 and the center line of shank is 15 ~ 20 °, and the center line of auxiliary feed orifice 7 is crossing with the inwall bottom line of shank, assists the lateral wall of the hole wall of feed orifice 7 and described cannelure tangent; Bulk supply hole 5 is communicated with the inner chamber of protective cover 1 by auxiliary feed orifice 7.
The bottom of overcoat 3 is provided with argon gas access port 6.
As shown in Figure 1, the center line of described protective cover 1, tungsten pin 2, overcoat 3 and tungsten needle holder 4 is same straight line.
As shown in Figure 1, described tungsten needle holder 4 is circular tube shaped, and tungsten needle holder 4 external diameter is equal with the nominal size of the internal diameter of overcoat 3, and the internal diameter of tungsten needle holder 4 is equal with the nominal size of the shank external diameter of tungsten pin 2.
The diameter in described bulk supply hole 5 is 2.5 ~ 3mm.
embodiment 2
A kind of inner chamber of plasma process is for powder tungsten pin.Locate outside following technical parameter, all the other are with embodiment 1:
The quantity of described auxiliary feed orifice 7 is 2 ~ 3 or 5 ~ 6, and the diameter of auxiliary feed orifice 7 is 0.5 ~ 1.0mm, and the angle of the auxiliary center line of feed orifice 7 and the center line of shank is 15 ~ 30 °
The diameter in described bulk supply hole 5 is 2.5 ~ 4mm.
This embodiment compared with prior art has following good effect:
1, the exit of auxiliary feed orifice 7 is arranged on non-electric arc generating unit by this embodiment, and namely the exit of auxiliary feed orifice 7 is arranged on the cannelure place of tungsten pin 2, ensure that auxiliary feed orifice 7 does not block because of arc erosion.This embodiment is evenly distributed with 2 ~ 6 auxiliary feed orifice 7, ensure that alloy powder is discharged from the auxiliary feed orifice 7 of tungsten pin 2 smoothly, and uniform feeding.In addition, powder can heat and the moisture contained in powder is evaporated by this embodiment, reduces the moisture maybe can eradicated in powder.
2, this embodiment operationally, the tip portion of tungsten pin 2 and surface of the work produce electric arc, argon gas is by the outlet of the cavity flow in the middle of overcoat 3 and protective cover 1 through protective cover 1, the plasma flow field of high-speed motion is jointly formed with electric arc, this flow field forms eddy current in auxiliary feed orifice 7 exit of tungsten pin 2 and produces jet suction-operated, alloy powder is made easily to enter plasma flow field by the auxiliary feed orifice 7 that diameter is less, high temperature when alloy powder imports from the bulk supply hole 5 of tungsten pin 2 and utilizes its work, powder is heated until melt, and enter plasma flow field by auxiliary feed orifice 7, the base material be melted with surface forms alloy-layer jointly, obtain the less and uniform alloy-layer of thickness.Base material also because the power relatively little and temperature rise distortion of heating is relatively low, significantly improves plasma surface crudy.
3, this embodiment is through field experiment: on base material, define the alloy-layer that thickness is 0.75 ~ 1.25mm, processes substrate deformation that the base material temperature rise that causes causes within the scope of ± 0.03mm; Continuous operation was more than 32 minutes, and tungsten pin 2 auxiliary feed orifice 7 does not occur by the phenomenon of arc erosion.
Therefore, this embodiment has the heating time that operating efficiency is high, long service life, plasma surface crudy are high, can extend alloy powder and the feature that the moisture contained in powder can be made to evaporate.
Claims (3)
1. the inner chamber of plasma process is for a powder tungsten pin, it is characterized in that described inner chamber comprises protective cover (1), tungsten pin (2), overcoat (3) and tungsten needle holder (4) for powder tungsten pin; Overcoat (3) and protective cover (1) are threaded, tungsten pin (2) is arranged in overcoat (3) and protective cover (1) by tungsten needle holder (4), the syringe needle of tungsten pin (2) is positioned at the nozzle of protective cover (1), and tungsten needle holder (4) is positioned at the top of overcoat (3);
The entirety that the external shape of protective cover (1) is made up of the round platform of bottom and the threaded post on top, the round platform bottom surface connected with threaded post has cannelure; The internal structure of protective cover (1) is followed successively by hollow cylinder, hollow round table and manhole from top to bottom;
The entirety that tungsten pin (2) is made up of shank and syringe needle, the upper end edge axis of shank is provided with bulk supply hole (5) down near lower end, and syringe needle is inverted cone-shaped, and the junction of shank and syringe needle is processed with cannelure; The junction of shank and syringe needle is symmetrically provided with auxiliary feed orifice (7), the quantity of auxiliary feed orifice (7) is 2 ~ 6, auxiliary feed orifice (7) is uniformly distributed, the diameter of auxiliary feed orifice (7) is 0.5 ~ 1.0mm, the angle of the auxiliary center line of feed orifice (7) and the center line of shank is 15 ~ 30 °, the center line of auxiliary feed orifice (7) is crossing with the inwall bottom line of shank, and hole wall and the described ring slot outside wall of auxiliary feed orifice (7) are tangent; Bulk supply hole (5) is communicated with the inner chamber of protective cover (1) by auxiliary feed orifice (7);
The bottom of overcoat (3) is provided with argon gas access port (6);
The center line of described protective cover (1), tungsten pin (2), overcoat (3) and tungsten needle holder (4) is same straight line.
2. the inner chamber of plasma process supplies powder tungsten pin according to claim 1, it is characterized in that described tungsten needle holder (4) is circular tube shaped, tungsten needle holder (4) external diameter is equal with the nominal size of the internal diameter of overcoat (3), and the internal diameter of tungsten needle holder (4) is equal with the nominal size of the shank external diameter of tungsten pin (2).
3. the inner chamber of plasma process, for powder tungsten pin, is characterized in that the diameter of described bulk supply hole (5) is 2.5 ~ 4mm according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510912451.7A CN105376921A (en) | 2015-12-11 | 2015-12-11 | Inner cavity powder supply tungsten needle for plasma processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510912451.7A CN105376921A (en) | 2015-12-11 | 2015-12-11 | Inner cavity powder supply tungsten needle for plasma processing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105376921A true CN105376921A (en) | 2016-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510912451.7A Pending CN105376921A (en) | 2015-12-11 | 2015-12-11 | Inner cavity powder supply tungsten needle for plasma processing |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87210474U (en) * | 1987-08-20 | 1988-08-03 | 铁道部大连机车车辆工厂 | Plasma welding torch |
| JPH0636890A (en) * | 1992-07-15 | 1994-02-10 | Mitsubishi Heavy Ind Ltd | Plasma spraying torch |
| JPH0810956A (en) * | 1994-06-30 | 1996-01-16 | Mitsubishi Materials Corp | Welding torch and build up welding equipment provided therewith |
| JPH08167497A (en) * | 1994-12-12 | 1996-06-25 | Mitsubishi Heavy Ind Ltd | Plasma spraying torch |
| CN1611318A (en) * | 2003-10-08 | 2005-05-04 | 通用电气公司 | Coating apparatus and processes for forming low oxide coatings |
| CN102450108A (en) * | 2009-05-01 | 2012-05-09 | 密执安州立大学董事会 | In-situ plasma/laser hybrid scheme |
| CN203851357U (en) * | 2014-06-01 | 2014-09-24 | 衢州昀睿工业设计有限公司 | Plasma heating decomposer |
-
2015
- 2015-12-11 CN CN201510912451.7A patent/CN105376921A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87210474U (en) * | 1987-08-20 | 1988-08-03 | 铁道部大连机车车辆工厂 | Plasma welding torch |
| JPH0636890A (en) * | 1992-07-15 | 1994-02-10 | Mitsubishi Heavy Ind Ltd | Plasma spraying torch |
| JPH0810956A (en) * | 1994-06-30 | 1996-01-16 | Mitsubishi Materials Corp | Welding torch and build up welding equipment provided therewith |
| JPH08167497A (en) * | 1994-12-12 | 1996-06-25 | Mitsubishi Heavy Ind Ltd | Plasma spraying torch |
| CN1611318A (en) * | 2003-10-08 | 2005-05-04 | 通用电气公司 | Coating apparatus and processes for forming low oxide coatings |
| CN102450108A (en) * | 2009-05-01 | 2012-05-09 | 密执安州立大学董事会 | In-situ plasma/laser hybrid scheme |
| CN203851357U (en) * | 2014-06-01 | 2014-09-24 | 衢州昀睿工业设计有限公司 | Plasma heating decomposer |
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Application publication date: 20160302 |
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