CN108337798A - Nozzle with slotted eye inlet profiles - Google Patents
Nozzle with slotted eye inlet profiles Download PDFInfo
- Publication number
- CN108337798A CN108337798A CN201810144559.XA CN201810144559A CN108337798A CN 108337798 A CN108337798 A CN 108337798A CN 201810144559 A CN201810144559 A CN 201810144559A CN 108337798 A CN108337798 A CN 108337798A
- Authority
- CN
- China
- Prior art keywords
- nozzle
- axis
- side wall
- guiding surface
- ellipse
- 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
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Classifications
-
- 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
- H05H1/34—Details, e.g. electrodes, nozzles
- H05H1/3405—Arrangements for stabilising or constricting the arc, e.g. by an additional gas flow
-
- 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
- H05H1/34—Details, e.g. electrodes, nozzles
- H05H1/3484—Convergent-divergent nozzles
Abstract
The present invention relates to a kind of nozzles, the plasma arc welding gun for being arranged symmetrically on nozzle-axis；And include the nozzle bore centered on nozzle shaft and the hole side wall with class cylinder；The gas guiding surface in the hole is arranged symmetrically and surrounded on nozzle-axis；And the gas guiding surface is connected to the entrance of the hole side wall, the entrance has the variable curvature generated with the rotation of class elliptical shape on nozzle-axis, for the wherein described class elliptical shape at least close to the elliptical part with long axis and short axle, the ratio of long axis and short axle is more than 2：1, and the wherein described class elliptical shape be positioned such that the gas guiding surface with its infall substantially with the ellipse it is tangent, and the hole side wall with its infall substantially with ellipse it is tangent.
Description
Technical field
Plasma arc welding gun constrains plasma gas to control electric arc using nozzle, and the present invention provides one kind
The profile of entrance for hole, the profile are found to provide increased stability, to improve cut quality and faster
Cutting speed.
Background technology
Nozzle 10 in the prior art has been illustrated in Fig. 1.Nozzle 10 is symmetrically formed on longitudinal nozzle axis 12, and is had
There is hole 14, which forms channel by the nozzle 10 being symmetrically formed on longitudinal nozzle axis 12.In general, hole is generally pylindrical,
And the nozzle 10 shown has cylindrical hole side wall 16, forms the pith of the length in hole 14.In the interior table of nozzle 10
What bread enclosed hole 14 is gas guiding surface 18, which is also arranged symmetrically on nozzle-axis 12, and it hangs down
It is straight to extend.Gas guiding surface 18 is connected to hole 14 by entrance 20, and shallow cone is formed centered on nozzle-axis 12.
Invention content
Plasma arc welding gun constrains plasma gas to control electric arc using nozzle.The present invention provides one kind
The profile of the entrance of nozzle bore for plasma arc welding gun, wherein entrance use variable curvature, the variable curvature quilt
It was found that provide increased stability and reduce the contraction of plasma arc, to improve cut quality and faster
Cutting speed.
Technical solution is used by the present invention solves the above problems：
Hole is formed by the hole side wall centered on the nozzle-axis of nozzle, and the gas vertically extended with nozzle-axis
Guiding surface surrounds.Hole side wall typically has general cylindrical (class is cylindrical) shape, and can be in horn-like, precipitous circle
Taper and/or ladder-like, this is ladder-like to have cylinder, horn-like or steep taper.The nozzle of the present invention, which has, guides gas
Surface is connected to the entrance of hole side wall, and it has variable crooked outline, to promote gas successfully ostium, this reduction
The unstability for the electric arc that plasma gas generates when being ionized.
The variable curvature of entrance is defined as class elliptical shape, can be an elliptical part or such part
Approximation.Ellipse is generally oriented into the angle δ for so that its long axis is formed relative to nozzle-axis between about 45 ° and 90 °, and
And it is positioned such that both gas guiding surface and hole side wall substantially tangent with its respective infall and ellipse.Therefore,
What is intersected with gas guiding surface is substantially perpendicular to nozzle-axis with oval tangent line, and it intersects with hole side wall with it is ellipse
The tangent line of circle is basically parallel to nozzle-axis.
Ellipse is also chosen to long axis and is significantly greater than short axle so that the ratio of long axis and short axle is more than 2：1, and more
Preferably at least 3：1.In preliminary test, 4.5 are found：1 axis ratio especially effectively, is provided at 125 amperes (amps)
The stability of the plasma arc of expected degree, and to increase maximum cutting rate (increasing about 20%), comparison
Similar nozzle in addition to shallow cone hole entrance, the diameter and depth of cone surface can be changed the rotation of bending entrance with limiting
It is identical with diameter to turn elliptical depth, there is intersection crunode identical with hole side wall and gas guiding surface.It is this improved to cut
Cutting performance is achieved in the case where not reducing nozzle service life.
Compared with the prior art, the advantages of the present invention are as follows：
The present invention provides a kind of profile of the entrance of the nozzle bore for plasma arc welding gun, wherein entrance uses
Variable curvature, the variable curvature are found to provide increased stability and reduce the contraction of plasma arc, from
And improve cut quality and faster cutting speed.
Description of the drawings
Fig. 1 is a partial sectional view, shows the nozzle of the prior art, which has is connected by shallow cone entrance
Hole and gas guiding surface, to help to guide airflow opening.
Fig. 2 is a partial sectional view, shows the nozzle of the present invention, has the hole by can be changed bending entrance connection
It is defined as the shape on nozzle-axis by ELLIPTIC REVOLUTION with the variable crooked outline of gas guiding surface, wherein entrance.
Elliptical inlet is used to that gas to be guided to stably enter hole unstability and contraction to reduce generated plasma arc.
Fig. 3 is the enlarged drawing in region 3 shown in Fig. 2, clearly shows and limits the elliptical several of hole entrance
What shape.The elliptical shape of the embodiment is ellipse, is oriented its long axis and extends normal to nozzle-axis, and its short axle
It is parallel to nozzle-axis.Ellipse, which is further positioned into, makes it intersect with gas guiding surface in a manner of tangential, and with
Tangential mode intersects with the hole side wall of nozzle bore.
Fig. 4 shows the similar region with shown in Fig. 3, and for another nozzle, wherein elliptical shape is positioned
At making it intersect at a slight angle with hole side wall and intersect at a slight angle with gas guiding surface.Intersection point is in this way
, i.e., it is tilted relative to hole side wall and gas guiding surface in point of intersection and oval tangent extended line.
Fig. 5 shows the similar region with shown in Fig. 3 and 4 of another nozzle.In the nozzle, ellipse is oriented
Its long axis and short axle are tilted relative to nozzle-axis, rather than long axis is vertical and short axle is parallel.
Fig. 6 show with Fig. 3-5 shown in similar region, but for have by the ratio between long axis and short axle be about
4.5:The nozzle of entrance defined by 1 ellipse.
Specific implementation mode
Below in conjunction with attached drawing embodiment, present invention is further described in detail.
Fig. 2 and Fig. 3 show the plasma arc torch nozzles 100 for forming one embodiment of the present of invention.Nozzle 100
The hole 104 being connected to longitudinal nozzle axis 102 and centered on nozzle-axis 102 and with inner space 106.Hole 104 by with
Cylindrical hole side wall 108 centered on nozzle-axis 102 partly limits.Although hole 104 shown in is that there are two cylindrical for tool
Partial stairstepping, it should be understood by those skilled in the art that hole can be by one or more tubaeform and/or precipitous
Conical surface formed.Inner space 106 is partly defined by gas guiding surface 110, surrounds hole 104 and positioned at vertical
In the gas guiding surface in the plane of nozzle-axis 102.
Gas guiding surface 110 is connected to hole side wall 108 by entrance 112.Entrance 112 has to be limited by elliptical shape 114
Variable crooked outline.The variable curved surface of entrance 112 generates by along 102 ellipse of revolution shape 114 of nozzle-axis.Such as
It is better shown in the enlarged drawing of Fig. 3, elliptical shape 114 is one with long axis 118 and the ellipse 116 of short axle 120
Point.Ellipse 116 is oriented such that long axis 118 extends perpendicular to nozzle-axis 102 and (and is accordingly parallel to gas guiding surface
110 plane), and short axle 120 is parallel to nozzle-axis 102.Ellipse 116 is further located so that it in short axle 120
At one end intersects with gas guiding surface 110, and intersects with hole side wall 108 in the at one end of long axis 118.Ellipse 116 and gas
The intersection location of body guiding surface 110 causes gas guiding surface 110 tangent in intersection and ellipse 116.Similarly, oval
116 cause hole side wall 108 tangent in intersection and ellipse 116 with the intersection location of hole side wall 108.
Although it is about 2 that ellipse 116, which is shown as its long axis 118 and the ratio of its short axle 120,:1, but at 125 amperes
Preliminary test in welding gun shows that larger ratio provides better cutting performance, and showing that they are provided larger reduces
The unstability of plasma arc during use.For 125 amperes of nozzle of test, 3：The ratio of 1 axis (118,120)
Rate is seemingly than 2：1 more actual minimum rate provides apparent better quality cutting.With 1.625:The nozzle quilt of 1 ratio
It is the discovery that unpractical, because cut quality is poor, and being difficult to will be in arc transfer to workpiece.It is 4.5 with ratio:1
Nozzle is found to provide best performance, generates the cutting of high quality and than having 3:The nozzle of 1 ratio is considerably more rapid most
Big cutting speed.
Fig. 4 and Fig. 5 shows some examples of the slight change of possible geometry.Such variation can allow certainly
By spending preferably matching inlet profiles to desired state, while still providing the benefit of the present invention.
Fig. 4 is the partial view of nozzle 100', and region shown in Fig. 4 corresponds in Fig. 3 for area shown in nozzle 100
Domain.Nozzle 100' has the entrance 112' limited by elliptical shape 114'.Elliptical shape 114' be with it is ellipse shown in Fig. 2 and 3
A part of 116 similar oval 116' of circle, but it is positioned relative to hole side wall 108' so that itself and hole side wall 108' phases
Meet at a small angle.The intersection of oval 116' and hole side wall 108' make point of intersection with ellipse 116' is tangent prolongs
Long line 130 is relative to the hole angles of inclination side wall 108' ε.Angle ε should keep smaller to keep cross section generally tangential；For big
For majority application, feel that the inclination should remain less than 15 °.
Oval 116' is positioned also relative to gas guiding surface 110' so that it is with gas guiding surface 110' with small
Angle of intersection.The extended line 132 tangent with ellipse 116' draws relative to gas at the point intersected with gas guiding surface 110'
Lead the surface angles of inclination 110' γ.
Fig. 5 is the partial view for the nozzle 100 " to form an alternative embodiment of the invention.In nozzle 100 ", entrance
112 " to have the variable curvature that is limited by elliptical shape 114 ", the elliptical shape 114 " be a part for ellipse 116 ", is oriented
It is tilted relative to nozzle-axis 102 for its long axis 118 ", rather than it is perpendicular.From long axis 118 " stretch out extended line 134 with
Nozzle-axis 102 is intersected with 45 ° fewer than 90 ° and 90 ° of angle δ.Ellipse 116 " in a tangential manner with hole side wall 108 " and gas
Guiding surface 110 " all intersects.
The part that Fig. 6 is with the entrance 112 " of variable crooked outline limited by ellipse 136 ' nozzle 100 " ' regards
Figure, ellipse 136 is a part with long axis 140 and the ellipse 138 of short axle 142, wherein the ratio of long axis 140 and short axle 142
Rate is about 4.5:1.As described previously for the 125A nozzles of test, this ratio provides excellent cutting performance.
In addition to the implementation, all to use equivalent transformation or equivalent replacement the invention also includes there is an other embodiment
The technical solution that mode is formed should all be fallen within the scope of the hereto appended claims.
Claims (3)
1. a kind of nozzle, the plasma arc welding gun for being arranged symmetrically on nozzle-axis；It is characterized in that：It includes：
Centered on nozzle-axis and the nozzle bore with class cylindrical hole side wall；
The gas guiding surface in the hole is arranged symmetrically and surrounded with nozzle-axis；And
The gas guiding surface is connected to the entrance of the hole side wall, the entrance has by with the nozzle-axis
The elliptical rotation of class and the variable curvature that generates, wherein the class elliptical shape is at least close to long axis and short axle
An elliptical part, wherein the ratio of the long axis and short axle is more than 2：1, and the wherein described class elliptical shape is oriented to make
The gas guiding surface with its infall substantially with the ellipse it is tangent, and the hole side wall with its infall
It is substantially tangent with the ellipse.
2. a kind of nozzle according to claim 1, it is characterised in that：The ratio of the elliptical long axis and short axle is at least
3:1, and the elliptical long axis is directed relative to the nozzle-axis with angle δ, and angle δ range meets 45 °~90 °.
3. a kind of nozzle according to claim 1, it is characterised in that：The ratio of the elliptical long axis and short axle is 4.5:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810144559.XA CN108337798A (en) | 2018-02-12 | 2018-02-12 | Nozzle with slotted eye inlet profiles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810144559.XA CN108337798A (en) | 2018-02-12 | 2018-02-12 | Nozzle with slotted eye inlet profiles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108337798A true CN108337798A (en) | 2018-07-27 |
Family
ID=62929326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810144559.XA Pending CN108337798A (en) | 2018-02-12 | 2018-02-12 | Nozzle with slotted eye inlet profiles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108337798A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102216602A (en) * | 2008-11-14 | 2011-10-12 | 德尔福技术控股有限公司 | Injection nozzle |
| US20170048961A1 (en) * | 2015-08-12 | 2017-02-16 | Thermacut, S.R.O. | Plasma Arc Torch Nozzle with Variably-Curved Orifice Inlet Profile |
| CN106715027A (en) * | 2014-08-12 | 2017-05-24 | 海别得公司 | Cost effective cartridge for a plasma arc torch |
| CN208490021U (en) * | 2018-02-12 | 2019-02-12 | 胜卡特有限公司 | Nozzle with slotted eye inlet profiles |
-
2018
- 2018-02-12 CN CN201810144559.XA patent/CN108337798A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102216602A (en) * | 2008-11-14 | 2011-10-12 | 德尔福技术控股有限公司 | Injection nozzle |
| CN106715027A (en) * | 2014-08-12 | 2017-05-24 | 海别得公司 | Cost effective cartridge for a plasma arc torch |
| US20170048961A1 (en) * | 2015-08-12 | 2017-02-16 | Thermacut, S.R.O. | Plasma Arc Torch Nozzle with Variably-Curved Orifice Inlet Profile |
| CN208490021U (en) * | 2018-02-12 | 2019-02-12 | 胜卡特有限公司 | Nozzle with slotted eye inlet profiles |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180727 |