CN104874497B - Wire drawing type high velocity arc spraying gun - Google Patents
Wire drawing type high velocity arc spraying gun Download PDFInfo
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- CN104874497B CN104874497B CN201510324848.4A CN201510324848A CN104874497B CN 104874497 B CN104874497 B CN 104874497B CN 201510324848 A CN201510324848 A CN 201510324848A CN 104874497 B CN104874497 B CN 104874497B
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- wire
- wire feed
- upper shell
- reducing
- runner
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/06—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means using electric arc
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- Coating By Spraying Or Casting (AREA)
Abstract
The invention discloses a kind of wire drawing type high velocity arc spraying gun, including wire feeding motor, reducing gear, wire feeder and gun head, wire feeding motor output shaft is connected with reducing gear, reducing gear output shaft two ends are each connected with a wire feeder, each wire feeder be provided with into, go out fiber tube, gun head includes rear lance, rear lance front end is installed by front gun body, nozzle is fixed on rear lance via support base and is stretched out from front gun body inner chamber, airflow path is provided with rear lance, the reducing and expansion type runner insertion of airflow path and nozzle, outer nozzle wall is provided with outer cover and forms the ring-like runner communicated with reducing and expansion type runner between the two, rear lance is equipped with two ignition tips, each ignition tip seal wire inclined hole corresponding on nozzle is corresponding, two silk materials sent out from seal wire inclined hole are made to be crossed near reducing and expansion type runner exit.The present invention can improve spraying particle velocity, dispersed jet is more concentrated uniformly, it is to avoid wire feed part and silk material are contacted with dust in wire feeder, are effectively increased the service life.
Description
Technical field
The present invention relates to a kind of wire drawing type high velocity arc spraying gun, belong to arc spraying technology field.
Background technology
Arc spraying technology is widely used for preparing the various property such as wear-resistant, anticorrosion as the important branch of thermal spraying
The coating of energy, it is modified with the size restoration and surface of realizing machine components, or even for the three-dimensional rapid forming field of material.Electricity
Arc spraying technology originates from the twenties in last century, and it is to obtain the electric starting the arc by two one metal wire materials, by the rapid fusing of silk material itself,
And accelerate a kind of spray coating process of molten drop by high-speed gas atomization.This arc spraying technology has high-quality, efficient, low
The significant advantages such as cost, for example, using B alloy wire as the electric arc spraying efficiency of sprayed on material up to 40kg/h, be powder at a high speed
More than 4 times of flame spray technique, its operating cost is but less than the 1/10 of the latter.But, arc spraying technology there is also
Weak point, for example, the particle rapidity and anchoring strength of coating of spraying are not so good as HVOF and plasma spraying, causes it
Range of application is increasingly restricted, and wherein arc spray gun is to restrict one of its key factor for developing.
Existing arc spray gun mainly has push-wire-type, wire drawing type electric arc spraying rifle.The structure of push-wire-type electric arc spraying rifle
It is relatively simple, it is primarily suitable for spraying during hard metal material short distance wire feed.And wire drawing type electric arc spraying rifle by wire feeder,
, in one, structure is more relative complex, but can meet different hardness silk material and length for the structure assembly such as the conductive starting the arc and acceleration atomization
Apart from the spraying of various occasions such as wire feed, and because wire feeder is arranged on gun head, feeding stability is than push-wire-type electric arc
Spray gun is many by force.
The structure of domestic commercial wire drawing type electric arc spraying rifle is more single at present, and its wire feed unit is essentially all by one
Level planetary gear and Worm Wheel System reducing gear adjust to suitable electric arc spraying work the speed of direct current generator and torque
In the range of work, especially the wire feed driving wheel and wire feed driven pulley of the wire feed unit of this arc spray gun mostly it is exposed outside,
On the one hand a large amount of dust that is produced during spraying makes silk material surface heavily contaminated, so influence the electrical transmission parts such as ignition tip with
The electric conductivity of silk material, or even the quality and performance of forming coating are influenceed, on the other hand also exacerbate wire feed zero in wire feed unit
The abrasion of part, and then the service life of arc spray gun is greatly shortened.In addition, the lance head of current wire drawing type electric arc spraying rifle
The most nozzle arrangements using primary atomization of the atomization unit in portion, this nozzle arrangements can cause spray stream to dissipate, particle speed
Degree is low.
As can be seen here, design and a kind of avoid silk material, wire feed part in spraying by dust pollution, long service life
Arc spray gun, and the boundling degree and flying speed of partcles of spray stream are improved, it is current urgent problem.
The content of the invention
It is an object of the invention to provide a kind of wire drawing type high velocity arc spraying gun, the wire drawing type high velocity arc spraying gun can
The speed of spraying particle is effectively improved, the dispersed jet that ejects concentrated, uniform, and wire feed part can be avoided in spraying process
(wire feed driving wheel, wire feed driven pulley etc.), ignition tip contact with dust and pollute and wear and tear, while it also avoid silk material receiving
To the pollution of dust, and the wire drawing type high velocity arc spraying gun compact conformation, light compact, long service life, low cost can be very
The above-mentioned deficiency of existing wire drawing type electric arc spraying rifle is made up well.
To achieve these goals, present invention employs following technical scheme：
A kind of wire drawing type high velocity arc spraying gun, it is characterised in that：It includes wire feeding motor, reducing gear, wire feeder
And gun head, wire feeding motor output shaft is connected with reducing gear, the output shaft two ends of reducing gear each with a wire feeder
It is connected, each wire feeder of closing is provided with and enter fiber tube, go out fiber tube via what copper bar was connected, and reducing gear is acted in wire feeding motor
Lower drive wire feeder action, the silk material to entering fiber tube performs wire feed action and sends out silk material, gun head from fiber tube is gone out
Including rear lance, the front end of rear lance is provided with front gun body, and nozzle is fixed on rear lance and from front gun body via support base
Inner chamber is stretched out, and airflow path is provided with rear lance, and airflow path is via the through hole on support base and the reducing and expansion type runner of nozzle
Insertion, outer nozzle wall is provided with outer cover and is formed between the two and sprays the secondary gas flow that the primary air sprayed with reducing and expansion type runner converges
Ring-like runner and ring-like runner communicated with reducing and expansion type runner, two ignition tips, each ignition tip and nozzle are equipped with rear lance
On corresponding seal wire inclined hole correspondence so that from go out fiber tube feeding ignition tip and from seal wire inclined hole send out two silk materials in reducing and expansion type
Runner exit nearby crosses.
It is preferred that the ring-like runner is the ring-like runner of contraction type.
The reducing and expansion type runner of the nozzle is made up of contraction chamber and expansion cavity, osculum end and the expansion cavity of contraction chamber
Entrance is connected, and the outlet of expansion cavity is the outlet of the reducing and expansion type runner, wherein：The a diameter of 5mm of big opening end of contraction chamber~
16mm, the osculum end of contraction chamber and the inlet diameter of expansion cavity are 5mm~10mm, and the outlet diameter of expansion cavity is 5mm~12mm；
For 6mm~13mm, external diameter is 6.5mm~14mm to the internal diameter of the annular outlets of the described ring-like runner of injection secondary gas flow.
The wire feeder includes the wire feed driving wheel on the reducing gear output shaft, the reducing gear
Plastic insulation ring is equipped between output shaft and wire feed driving wheel, wire feed driven pulley is provided with above wire feed driving wheel, wire feed drives
Between driving wheel and wire feed driven pulley have gap so that from it is described enter fiber tube enter silk material by wire feed driving wheel and wire feed
During gap between driven pulley, under the rotational movement of wire feed driving wheel and wire feed driven pulley from it is described go out fiber tube send out.
It is preferred that the wire feeder include U-shaped support base, it is described enter fiber tube, it is described go out fiber tube be separately mounted to support
On two parallel columns of seat, the wire feed driving wheel and the wire feed driven pulley are in the space between two columns,
The top of support base is covered in the circular upper shell of about a quarter by section and the wire feed driven pulley is arranged in upper shell,
The bottom of support base is blocked by the lower cover being adapted with upper casing shape, and rubber seal is provided between upper shell and lower cover
Bar, support base, upper shell and lower cover constitute a closing space so that the dust produced when closing space is with spraying is separated by
Absolutely.
In actual design, it is preferred that the upper shell is rotatably installed in the support base by upper shell rotary shaft
On column described in, and the axle center of the arc surface of the upper shell, the arc surface of the lower cover and upper shell rotary shaft keeps
With one heart, so that the upper shell can be around upper shell rotary shaft big angle rotary.
Further, the upper shell is provided with the gear corresponding with the top of another described column of the support base
Portion, is provided with the silk pressing power regulation handle with spring above stopper, silk pressing power regulation handle is connected after passing through stopper by handle
Spindle is connected with the column, is adjusted by elastic rotation to silk pressing power regulation handle, can make the upper shell on described
Housing into rotation axle is slightly rotated and realizes the regulation of silk material thrust between the wire feed driven pulley and the wire feed driving wheel.
The support base, the upper shell and the lower cover are all made up of isolation material.
The nozzle is made up of ceramic material, and the ignition tip is made up of Copper alloy material, and the rear lance is led with described
Remained electrically isolated between sparking plug.
It is an advantage of the invention that：
1st, in the present invention main injection jet and the physical design of ring-type cap jet realizes double aerodynamic atomization effects, realizes
The high-speed uniform atomization of sprayed on material, atomization particle is more concentrated, wherein：Primary air primarily serves acceleration atomized molten spraying
The effect of material (silk material), the reducing and expansion type runner design of nozzle can make the air velocity of the outer primary air of main injection jet steadily reach Supersonic
Speed, while making the striking point of silk material be arranged near main injection jet, has maximally utilised the kinetic energy of primary air；Secondary gas flow is then
A kind of compression effectiveness is produced to primary air, because two presence of silk material can make primary air produce non-axis symmetry in main injection jet downstream
Divergent Phenomenon, the result of this phenomenon is the particle atomizing speed in jet edge is become very low, so of the invention
Crossed by secondary gas flow and primary air and a kind of strong compression is produced to the diverging edge of primary air, and then cause spray
Apply jet more to concentrate, silk material is down to alap degree to the interference effect of air-flow, while also further increasing spray
Apply the speed of particle.
2nd, the overall construction design of the upper shell, lower cover and support base in the present invention, by silk pressing power regulation handle
On the basis of thrust suffered by adjustable silk material, a closing space for avoiding a large amount of dust from entering can be remained so that
The wire feed parts such as wire feed driving wheel and wire feed driven pulley in closing space will not be in contact with the dust produced when spraying, preferably
Intercepted the entrance of a large amount of dust, it is to avoid the wire feed such as wire feed driving wheel and wire feed driven pulley part because dust and caused by grind
Damage, while it also avoid silk material and ignition tip is polluted by dust.
3rd, during spraying operation conventional wire drawing type electric arc spraying rifle be connected with a snorkel, two thick spraying cables,
A piece wire feeding motor control line and two wire-feeding pipes, and the present invention send only with a snorkel, two wire feed cables and one
Silk motor control line, wire feed cable therein has the function of the transmission of electricity of spraying cable and wire-feeding pipe seal wire concurrently, so that this hair
Bright structure is more compact, light, it is easy to operate.
Brief description of the drawings
Fig. 1 is the structural representation of wire drawing type high velocity arc spraying gun of the present invention.
Fig. 2 is the structural representation (not shown lower cover) of wire feeder from Fig. 1 as viewed from A directions.
Fig. 3 is that from Fig. 1 as viewed from wire drawing type high velocity arc spraying gun side of the present invention, the structure of wire feeder amplifies signal
Figure (not shown wire feeding motor, gun head, upper shell, lower cover, go out fiber tube etc.).
Fig. 4 is the cross-sectional schematic cross-section of the gun head in Fig. 1.
Specific embodiment
As shown in Figures 1 to 4, wire drawing type high velocity arc spraying gun of the present invention includes wire feeding motor 11, reducing gear 12, send
Silk mechanism 20 and gun head 30, the output shaft of the front end of wire feeding motor 11 are connected with the input of reducing gear 12, reducing gear
(output shaft 121 of reducing gear 12 is a kind of double output shaft, and this double output shaft is defeated with two at 12 two ends of output shaft 121
Go out end, and the two output end are respectively positioned at the both sides of reducing gear 12) be each connected with a wire feeder 20, i.e., two
Individual wire feeder 20 is each located on the both sides of reducing gear 12 and is symmetric.Specifically, the power of wire feeding motor 11 leads to
Cross its output shaft to export to reducing gear 12, reducing gear 12 is defeated by its again by power by after reduction of speed, the regulation of increase torque
Shaft 121 is exported to wire feeder 20, to meet the rotating speed and power needed for the wire feed driving wheel 26 during spraying in wire feeder 20
Square.As schemed, each wire feeder 20 for preventing dust from entering with outer closures isolation is provided with what is be connected via conducting copper 24
Enter fiber tube 18, go out fiber tube 19, reducing gear 12 drives wire feeder 20 to act under the effect of wire feeding motor 11 and (drives wire feed drive
Driving wheel 26 rotates) and the silk material 50 to entering fiber tube 18 performs wire feed action and sends out silk material 50 from fiber tube 19 is gone out.
As Fig. 1 and Fig. 4, gun head 30 can be arranged on the front end of reducing gear 12, gun head 30 includes being arranged on reducing gear 12
The rear lance 31 of front end, the front end of rear lance 31 is provided with front gun body 32, and nozzle 34 is fixed on rear lance 31 via support base 36
Stretch out above and from the inner chamber of front gun body 32, airflow path 311 is provided with rear lance 31, set on airflow path 311 and rear lance 31
Some air inlets 312 are connected, and air inlet 312 is connected by snorkel with outside feeder (not shown), airflow path
311 connect via the through hole 361 opened up on support base 36 with the reducing and expansion type runner of nozzle 34, and reducing and expansion type runner is in nozzle 34
It is upper formation main injection jet 345, the outer wall of nozzle 34 be provided with outer cover 37 and be formed between the inwall of outer cover 37 and the outer wall of nozzle 34 for
The ring-like runner 371 and ring-like runner 371 of the secondary gas flow that the primary air sprayed with reducing and expansion type runner converges are sprayed via through hole
344 are connected with reducing and expansion type runner, and the secondary gas flow that ring-like runner 371 sprays is annular in shape, is externally rendered as ring-type cap jet
372, the effect for spraying secondary gas flow is to realize that the edge constraint of spraying primary air and further atomization accelerate, rear lance
Be equipped with two ignition tips 33 on 31, each ignition tip 33 after support base 36 to the corresponding seal wire inclined hole 341 pairs on nozzle 34
Should set, so that two silk materials 50 sent out from the thread eye 331 for going out the feeding ignition tip 33 of fiber tube 19 and from seal wire inclined hole 341
Crossed near reducing and expansion type runner exit (i.e. the main injection jet 345 of nozzle 34), two silk materials are insulated from each other before crossing, in reality
It is intersecting with certain angle (it is preferred that 30 degree~60 degree) mutually between two axis of ignition tip 33 in design, in other words,
Two angles of the central axis of the seal wire inclined hole 341 being distributed with the axisymmetrical of nozzle 34 are between 30~60 degree.
Such as Fig. 4, in actual design, it is preferred that ring-like runner 371 is the ring-like runner of contraction type, i.e., ring-like runner 371 from
To exporting, annular interior cavity is tapered into its entrance, and such contraction structure design can be such that secondary gas flow accelerating jetting goes out and real
Existing compression effectiveness.
Such as Fig. 4, the present invention can be designed with arc blocking cover 35, i.e. nozzle 34 and be installed in the arc blocking cover 35 of the front end of front gun body 32 and cover
Firmly.
In actual design, the aperture that seal wire inclined hole 341 is exported is between 1.6mm~3.0mm (with specific reference to silk to be sprayed
The diameter of material is determined).As schemed, the center phase of two intersection points of the central axis of seal wire inclined hole 341 and the main injection jet 345 of nozzle 34
Away from distance between 0~8mm, that is to say, that two intersection points of the central axis of seal wire inclined hole 341 can be in main injection jet 345
The left side or right side of the heart.
Such as Fig. 4, the reducing and expansion type runner of nozzle 34 is made up of contraction chamber 342 and expansion cavity 343, the osculum end of contraction chamber 342
Entrance with expansion cavity 343 is connected, and the outlet of expansion cavity 343 is the outlet of reducing and expansion type runner, the i.e. main injection jet of nozzle 34
345, in the present invention, the reducing and expansion type flow passage structure of nozzle 34 can produce supersonic airstream, and this is technology known in the art.
In the present invention, through hole 344 is preferably located on the rear portion of reducing and expansion type runner, i.e., it is preferred that ring-like runner 371 is via through hole
344 connect with contraction chamber 342.
In actual design, it is preferred that a diameter of 5mm~16mm of the big opening end of contraction chamber 342, the osculum of contraction chamber 342
The inlet diameter of end and expansion cavity 343 is 5mm~10mm, and the outlet diameter of expansion cavity 343 is 5mm~12mm, and expansion cavity 343
Length can be 0~50mm.Correspondingly, the annular outlets (i.e. ring-type cap jet 372) of the ring-like runner 371 of injection secondary gas flow
Internal diameter for 6mm~13mm external diameter be 6.5mm~14mm.
Above-mentioned reducing and expansion type runner designs the main injection jet caused with primary air in nozzle 34 with the physical dimension of ring-like runner 371
The secondary gas flow converged at 345 can more effectively play a part of boundling atomization and accelerate spraying particle.
(Fig. 2 is to see wire feeder before wire drawing type high velocity arc spraying gun rear direction of the present invention from Fig. 1 as shown in Figure 1, Figure 2
20 schematic diagrames for obtaining), shown in Fig. 3, wire feeder 20 may include that the wire feed being arranged on the output shaft 121 of reducing gear 12 drives
Wheel 26, the top of wire feed driving wheel 26 is provided with wire feed driven pulley 22, between having between wire feed driving wheel 26 and wire feed driven pulley 22
Gap, so that from entering the silk material 50 of the entrance of fiber tube 18 when by gap between wire feed driving wheel 26 and wire feed driven pulley 22,
Sent out from going out fiber tube 19 under wire feed driving wheel 26 and the rotational movement of wire feed driven pulley 22.
Such as Fig. 2 and Fig. 3, the plastic insulation ring assembled between the output shaft 121 and wire feed driving wheel 26 of reducing gear 12
21 design, it can be ensured that be electrically insulated between reducing gear 12 and wire feed driving wheel 26, then ensures reducing gear 12 and silk material 50
Between remain electrically isolated from.
Further as shown in Figure 1 to Figure 3, wire feeder 20 may also include U-shaped support base 25, and support base 25 is parallel by two
Column 251 and a bottom bar 252 connect and compose, enter fiber tube 18, go out fiber tube 19 be separately mounted to two of support base 25 it is parallel
Column 251 on, wire feed driving wheel 26 and wire feed driven pulley 22 are in the space between two columns 251, support base 25
Top is covered by upper shell 13, and the section of upper shell 13 is circular in about a quarter, and wire feed driven pulley 22 is via driven wheel shaft
16 are rotatably installed in upper shell 13, i.e. the about a quarter circle side plate 132 of wire feed driven pulley 22 two in upper shell 13
Gap in, the bottom of support base 25 is blocked by the lower cover 14 being adapted with the shape of upper shell 13, in practice, upper shell 13
Two lower sections of side plate 132 be respectively equipped with a lower cover 14, and be located between support base 25 and reducing gear 12 and (be located at
The inner side of support base 25) lower cover 14 be integrally formed with support base 25, to ensure generally robust property, and be located at support base 25
The lower cover 14 in outside needs to be fixed on support base 25.Rubber weather strip 23 is installed between upper shell 13 and lower cover 14.
In the present invention, the concaved circular cambered surface and rubber weather strip 23 of the convex arc surface of upper shell 13, two lower covers 14
Design cause support base 25, upper shell 13 and lower cover 14 that a closing space can be all the time constituted during spraying operation,
So that the wire feed driving wheel 26 and the grade wire feed part of wire feed driven pulley 22 in closing space are produced with gun head 30 in spraying
Raw dust is not in contact, and preferably intercepts the entrance of a large amount of dust to avoid wire feed driving wheel 26 and wire feed driven pulley 22 etc.
Wire feed part because dust and caused by wear and tear, while the silk material 50 that it also avoid in wire feeder 20 is polluted by dust.
It is preferred that in actual design, upper shell 13 can be rotatably installed in support base 25 by upper shell rotary shaft 17
On one column 251, and the convex arc surface of upper shell 13, two lower covers 14 concaved circular cambered surface and the axle center of upper shell rotary shaft 17
Keep concentric, can so cause that upper shell 13 can rotate around the wide-angle of upper shell rotary shaft 17 (more than 90 degree).
Further, upper shell 13 is provided with the stopper 131 corresponding with the top of another column 251 of support base 25,
Stopper 131 is in the top of column 251, and the top of stopper 131 is provided with the silk pressing power regulation handle 15 with spring, the regulation of silk pressing power
Handle 15 is connected by handle connecting shaft 151 after passing through stopper 131 with column 251, in practice, hand is adjusted by silk pressing power
The elastic rotation regulation of handle 15, can make upper shell 13 slightly be rotated around upper shell rotary shaft 17 and realize wire feed driven pulley 22 and send
The regulation of silk material thrust size between silk driving wheel 26.
Specifically, silk pressing power regulation handle 15 is pressed in the stopper 131 of upper shell 13, and hand is adjusted by rotating silk pressing power
Handle 15 can adjust its thrust to stopper 131 on the column 251 of support base 25, then make to be in wire feed driving wheel 26 and send
The thrust suffered by silk material 50 between silk driven pulley 22 is accordingly adjusted, when wire feed driving wheel 26 rotates, to have
Realize to effect the lasting transmission of silk material 50.
It should be noted that during thrust regulation, the fit circular arc face between upper shell 13 and lower cover 14 is begun
Remain eventually can consistently form one and keep away between contact, therefore upper shell 13, lower cover 14 and support base 25 in spraying process
Exempt from the closing space of a large amount of dust entrance, and the convex arc surface of upper shell 13, the concaved circular cambered surface of lower cover 14 and upper shell are rotated
Being arranged concentrically between the three of axle 17, is the key for realizing closing space.
It is highly preferred that such as Fig. 2 and Fig. 3, in actual fabrication, the thickness of two columns 251 of support base 25 is different, and
The concaved circular cambered surface 255 being engaged with the convex arc surface of upper shell 13 is designed with the medial surface of corresponding column 251.In upper shell 13
Convex arc surface while be in contact with the concaved circular cambered surface of lower cover 14, the convex arc surface of upper shell 13 also with corresponding column 251
On concaved circular cambered surface 255 be in contact, also, same between the convex arc surface of upper shell 13 and the concaved circular cambered surface 255 of column 251 set
There is rubber weather strip 23, so that further strengthen the seal of closing space, it is particularly closed in silk material loading procedure.
In actual fabrication, nozzle 34 is by all very excellent, long service life the ceramic material system of high temperature resistant, abrasion resistance properties
Into ignition tip 33 is made up of the good Copper alloy material of electric conductivity, and rear lance 31 can be by insulating materials or nonisulated metal
Material is made, but rear lance 31 using metal material when it is kept between ignition tip 33 by increasing the measures such as insulation sleeve
Electric insulation.Further, support base 25, upper shell 13 and lower cover 14 are all made up of insulating materials, therefore ensure that two silks
Reliability before material 50 is realized crossing through wire feed passage (thread eye 331, seal wire inclined hole 341) insulate.
In the present invention, the gap very little between the thread eye 331 of ignition tip 33 and its interior silk material 50, and with isolation
The wire feeder 20 of dust function can avoid dust enter wire feed passage, thus this cause silk material 50 have preferably conduct energy
Power so that when spraying, electric energy by spraying source device (not shown) with enter wire feed cable that fiber tube 18 is connected (in figure
It is not shown), enter fiber tube 18, copper bar 24, go out fiber tube 19 and be delivered to ignition tip 33, and then silk material 50 is transported to by ignition tip 33
End, makes silk material 50 obtain the electric starting the arc.
In the present invention, primary air realizes the acceleration of gas during by reducing and expansion type runner, that is, obtain Supersonic
Fast air-flow, also, the secondary gas flow that primary air is sprayed by ring-like runner 371 is further atomized acceleration, and secondary gas flow is to primary air
A kind of compression effectiveness is produced, spray stream is more concentrated, secondary gas flow can further increase atomization gas after converging with primary air
The gross energy of stream, and supersonic zone is more long, air velocity change is relatively steady so that with certain angle nozzle 34 main jet
Two silk materials 50 that mouth 345 nearby crosses are maximum by airflow kinetic energy high speed atomisation (atomization particle flying speed is up to 200m/s)
Gas kinetic energy is make use of to limit, the atomization quality of melting silk material is improved.
In the present invention, electric arc burns in the near zone of main injection jet 345 of nozzle 34, main injection jet 345 and ring-type cap jet
372 physical design can have certain effect of contraction to the air-flow of arc region, and atomization particle can be made more to concentrate, and atomization is more
Uniformly.Meanwhile, the present invention does not design near the main injection jet 345 of nozzle 34 ignition tip 33, but design is in gun head 30
Rear end, this structure design causes ignition tip 33 away from arc region, it is to avoid ignition tip 33 to air-flow produces disturbance, also subtracts
The light temperature distortion of ignition tip 33 and because influenceed by dust and caused by wear and tear.
In the present invention, the design of two symmetrical seal wire inclined holes 341 reduces the Form and position error that assembling link causes, and then
Increased the centering of silk material 50, make striking point all the time on the central axis of nozzle 34, improve spraying stability and can
By property.
In the present invention, the air inlet 312 of rear lance 31 is equipped with snorkel (not shown), and wire feeding motor 11 is arranged
There is control line (not shown), enter fiber tube 18 and be equipped with wire feed cable (not shown), wire feed cable has spraying cable concurrently
The dual-use function that line is transmitted electricity with wire-feeding pipe seal wire.So with conventional wire drawing type electric arc spraying rifle arrange snorkel, two it is thick
Spraying cable, the design of a wire feeding motor control line and two wire-feeding pipes compare, the present invention effectively reduces pipeline number
Amount so that structure is more compact, light, it is easy to operate.
In the present invention, wire feeding motor 11, reducing gear 12 etc. are equipment known in the art, therefore its specific composition does not exist
Here describe in detail.In actual design, reducing gear 12 can be the combination of planetary reduction gear structure and worm and gear slowing-down structure,
Can be the combination of The gear deceleration structure and worm gear arrangement, can also be worm and gear slowing-down structure etc..
Before spraying, silk pressing power regulation handle 15 rotates from the stopper 131 of upper shell 14, make wire feed driven pulley 22 with
Upper shell 14 together outwards rotates out of larger angle, silk material 50 is easily passed through on fiber tube 18, wire feed driving wheel 26
The space of side and go out to enter gun head 30 after fiber tube 19, then, rotation upper compression filament power regulation handle 15 answers upper shell 14
Position, by rotating silk pressing power regulation handle 15, thrust suffered by silk material 50 is regulated during by wire feed.
Then, reducing gear 12 drives wire feed driving wheel 26 to rotate in the presence of wire feeding motor 11, and wire feed drives
Driving wheel 26 drives wire feed driven pulley 22 to rotate, and then wire feed driving wheel 26 drives together with wire feed driven pulley 22 and enter from entering fiber tube 18
The silk material 50 for entering does wire feed action.Then silk material 50 is sent by going out fiber tube 19, and then silk material 50 is admitted to ignition tip 33.So
After being each passed through corresponding seal wire inclined hole 341 by two silk materials 50 of each ignition tip 33 afterwards, near the main injection jet 345 of nozzle 34
Crossed with certain angle (30 degree~60 degree).
During spraying, the compressed gas of feeder output enter airflow path 311 by snorkel from air inlet 312, so
Sprayed from main injection jet 345 in the form of primary air after the reducing and expansion type runner of nozzle 34 produces acceleration afterwards.Work as primary air
During by reducing and expansion type runner, a part for primary air is entered into ring-like runner 371 from through hole 344, in the form of secondary gas flow
Annularly sprayed from cap jet 372, then, secondary gas flow converges near the main injection jet 345 of nozzle 34 with primary air.It is same with this
When, the end of silk material 50 by wire feed cable, enter fiber tube 18, copper bar 24, go out fiber tube 19, ignition tip 33 and obtain spraying source and fill
The electric energy of output is put, then the energization starting the arc of silk material 50, under the collective effect of primary air and secondary gas flow, the silk material of melting is by mist
Change accelerating jetting to go out, coating is formed on the surface of part to be sprayed with spraying particle form high speed deposition.
Wire drawing type high velocity arc spraying gun of the present invention can effectively improve the speed of spraying particle, the dispersed jet collection for ejecting
In, it is uniform, wire feed part (wire feed driving wheel, wire feed driven pulley etc.), ignition tip can be avoided to be contacted with dust in spraying process
And pollute and wear and tear, while it also avoid silk material polluted by dust, and the wire drawing type high velocity arc spraying gun structure
Compact, light compact, long service life, low cost can well make up the deficiency of existing wire drawing type electric arc spraying rifle.In addition,
Wire feeder design in wire drawing type high velocity arc spraying gun of the present invention can also be applied to silk material TIG, MIG and gas shielded welding
Deng field.
The above is presently preferred embodiments of the present invention and its know-why used, for those skilled in the art
For, without departing from the spirit and scope of the present invention, it is any based on technical solution of the present invention on the basis of equivalent change
Change, simply replacement etc. obviously changes, belong within the scope of the present invention.
Claims (7)
1. a kind of wire drawing type high velocity arc spraying gun, it is characterised in that：It include wire feeding motor, reducing gear, wire feeder and
Gun head, wire feeding motor output shaft is connected with reducing gear, the output shaft two ends of reducing gear each with a wire feeder phase
Even, each wire feeder of closing is provided with and enter fiber tube, go out fiber tube via what copper bar was connected, and reducing gear is under wire feeding motor effect
Wire feeder action is driven, the silk material to entering fiber tube performs wire feed action and sends out silk material, gun head bag from fiber tube is gone out
Rear lance is included, the front end of rear lance is provided with front gun body, and nozzle is fixed on rear lance and from front gun body via support base
Chamber is stretched out, and airflow path is provided with rear lance, and airflow path is passed through via the through hole on support base with the reducing and expansion type runner of nozzle
Logical, outer nozzle wall is provided with outer cover and is formed between the two and sprays the secondary gas flow that the primary air sprayed with reducing and expansion type runner converges
Ring-like runner and ring-like runner is communicated with reducing and expansion type runner, is equipped with two ignition tips on rear lance, on each ignition tip and nozzle
Corresponding seal wire inclined hole correspondence so that from go out fiber tube feeding ignition tip and from seal wire inclined hole send out two silk materials in reducing and expansion type stream
Road near exit crosses, wherein：Wire feeder includes wire feed driving wheel, wire feed driven pulley, U-shaped support base, enters fiber tube, goes out fiber tube
It is separately mounted on two parallel columns of support base, the sky of wire feed driving wheel and wire feed driven pulley between two columns
In gap, the top of support base is covered in the circular upper shell of about a quarter by section and wire feed driven pulley is arranged on upper shell
Interior, the bottom of support base is blocked by the lower cover being adapted with upper casing shape, and rubber is provided between upper shell and lower cover
Sealing strip, support base, upper shell and lower cover constitute a closing space so that the dust phase produced when closing space is with spraying
Isolation, upper shell is rotatably installed on a column of support base by upper shell rotary shaft, and upper shell arc surface, lower cover
The axle center of arc surface and upper shell rotary shaft keep concentric so that upper shell can be around upper shell rotary shaft big angle rotary.
2. wire drawing type high velocity arc spraying gun as claimed in claim 1, it is characterised in that：
The ring-like runner is the ring-like runner of contraction type.
3. wire drawing type high velocity arc spraying gun as claimed in claim 1, it is characterised in that：
The reducing and expansion type runner of the nozzle is made up of contraction chamber and expansion cavity, the osculum end of contraction chamber and the entrance of expansion cavity
Connection, the outlet of expansion cavity is the outlet of the reducing and expansion type runner, wherein：A diameter of 5mm~the 16mm of big opening end of contraction chamber, receives
The osculum end in contracting chamber and the inlet diameter of expansion cavity are 5mm~10mm, and the outlet diameter of expansion cavity is 5mm~12mm；
For 6mm~13mm, external diameter is 6.5mm~14mm to the internal diameter of the annular outlets of the described ring-like runner of injection secondary gas flow.
4. wire drawing type high velocity arc spraying gun as claimed in claim 1, it is characterised in that：
The wire feeder includes the wire feed driving wheel on the reducing gear output shaft, the reducing gear
Plastic insulation ring is equipped between output shaft and the wire feed driving wheel, be provided with above the wire feed driving wheel wire feed from
Driving wheel, between the wire feed driving wheel and the wire feed driven pulley have gap so that from it is described enter fiber tube enter silk material exist
It is driven with the wire feed in the wire feed driving wheel during by gap between the wire feed driving wheel and the wire feed driven pulley
Under the rotational movement of wheel from it is described go out fiber tube send out.
5. wire drawing type high velocity arc spraying gun as claimed in claim 1, it is characterised in that：
The upper shell is provided with the stopper corresponding with the top of another described column of the support base, is set above stopper
There are the silk pressing power regulation handle with spring, silk pressing power regulation handle to connect with the column by handle connecting shaft after passing through stopper
Connect, adjusted by the elastic rotation to silk pressing power regulation handle, the upper shell can be made slightly to turn around the upper shell rotary shaft
Regulation that is dynamic and realizing silk material thrust size between the wire feed driven pulley and the wire feed driving wheel.
6. wire drawing type high velocity arc spraying gun as claimed in claim 1, it is characterised in that：
The support base, the upper shell and the lower cover are all made up of insulating materials.
7. the wire drawing type high velocity arc spraying gun as any one of claim 1 to 6, it is characterised in that：
The nozzle is made up of ceramic material, and the ignition tip is made up of Copper alloy material, the rear lance and the ignition tip
Between remain electrically isolated from.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510324848.4A CN104874497B (en) | 2015-06-12 | 2015-06-12 | Wire drawing type high velocity arc spraying gun |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510324848.4A CN104874497B (en) | 2015-06-12 | 2015-06-12 | Wire drawing type high velocity arc spraying gun |
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| CN104874497A CN104874497A (en) | 2015-09-02 |
| CN104874497B true CN104874497B (en) | 2017-06-16 |
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| CN201510324848.4A Active CN104874497B (en) | 2015-06-12 | 2015-06-12 | Wire drawing type high velocity arc spraying gun |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107363357A (en) * | 2017-09-20 | 2017-11-21 | 苏州大学 | Laser cladding device |
| CN111441009A (en) * | 2020-04-13 | 2020-07-24 | 浙江灿根智能科技有限公司 | Bimetal composite shaft sleeve sintering production device |
| CN113684441B (en) * | 2021-08-27 | 2023-04-07 | 江阴恩特莱特镀膜科技有限公司 | Electric arc spray gun |
| CN115318472B (en) * | 2022-10-13 | 2022-12-09 | 合肥荣弘科技有限公司 | Sheet metal electrostatic spraying equipment |
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| AU739455B2 (en) * | 1997-09-04 | 2001-10-11 | International Metalizing Corporation | Twin wire electric arc metalizing device |
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| GB191325132A (en) * | 1911-12-18 | 1914-11-04 | Erika Morf | Improved Process of and Apparatus for Applying Coatings or Deposits of Fusible Substances to Surfaces. |
| US4720044A (en) * | 1985-12-13 | 1988-01-19 | Eagle Arc Metalizing Company | Electric arc spray metalizing apparatus |
| US4937417A (en) * | 1987-06-25 | 1990-06-26 | Douglas Call, Jr. | Metal spraying apparatus |
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|---|---|
| CN104874497A (en) | 2015-09-02 |
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