CN214640911U - Water-cooling welding gun - Google Patents
Water-cooling welding gun Download PDFInfo
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- CN214640911U CN214640911U CN202120729488.7U CN202120729488U CN214640911U CN 214640911 U CN214640911 U CN 214640911U CN 202120729488 U CN202120729488 U CN 202120729488U CN 214640911 U CN214640911 U CN 214640911U
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Abstract
The utility model discloses a water-cooling welder relates to the welding technology field, include: the electric arc torch comprises a torch body, an electrode rod and an end water cooling body, wherein the torch body is sleeved outside the electrode rod, one end of the electrode rod is an electric arc bearing part, the electric arc bearing part extends out of one end of the torch body, the electric arc bearing part is conical, and the electric arc bearing part is used for generating and bearing electric arcs; the end water cooling body is in a sleeve shape, the end water cooling body is sleeved on the electric arc bearing part, and the tip of the electric arc bearing part extends out of the end water cooling body; the outer insulating layer that is provided with of tip water-cooling body, the utility model provides a water-cooling welder suppresses the electric arc climbing through the cooling effect of the tip water-cooling body to electrode bar electric arc bearing part and the insulating layer on tip water-cooling body surface to reach compression electric arc's effect, improve electric arc density and deflection, realize the big welding penetration of undercurrent, improve welding efficiency and reduce welding cost.
Description
Technical Field
The utility model relates to the field of welding technique, especially, relate to a water-cooling welder.
Background
In the arc welding, an electrode carries an arc to provide a heat source for a welding workpiece, so that a welding wire and a base metal are melted to achieve the purpose of permanent connection. The traditional tungsten argon arc welding (TIG welding) has the characteristic of no melting of the electrode, has high arc quality, can realize high-quality welding, and is widely applied to various industrial fields. However, because the tungsten electrode has limited current carrying capacity, TIG welding has low arc current density and low arc pressure, thereby causing low welding efficiency and limiting further production application.
In order to improve the current bearing capacity of a tungsten electrode and overcome the defect of low efficiency of the traditional TIG welding, domestic and foreign scholars propose a large-current TIG welding method. By increasing the cooling capacity of the welding gun and the diameter of the electrode, the TIG welding current can reach more than 600A, and when the welding current is large enough, perforation welding (K-TIG) can be realized in the welding process. Under the condition of perforation welding, the TIG welding method can penetrate through 5-10mm butt-jointed plates at one time, so that the welding efficiency is obviously improved. However, the welding current is only increased to bring the defect of overlarge welding heat input, so that the mechanical properties such as the impact of a welding seam are obviously reduced, and the arc is obviously climbed on a cathode along with the increase of the welding current, so that the arc is diffused and the current density is reduced. Arc divergence is not conducive to keyhole weld formation, making the welding process unstable.
On the basis of large-current TIG welding, domestic and foreign scholars further propose forced cooling of the tungsten electrode, thereby improving the arc characteristics. For example, German enterprises and scholars propose CF-TIG welding methods, Tianjin university in China proposes welding methods such as tungsten electrode internal water-cooling TIG, copper-clad tungsten electrode water-cooling TIG, dry ice cooling tungsten electrode TIG and the like, and related enterprises in China also apply the improved K-TIG to actual welding production. However, in all of these welding methods, the tungsten electrode is cooled in the cylindrical area of the tungsten electrode, and when the welding current is increased, the temperature of the end of the tungsten electrode inevitably rises, and the arc climbs on the conical surface of the tungsten electrode, which cannot meet the requirement of small hole welding on high stability. In order to improve the stability of the K-TIG arc, colleges and universities such as Tianjin university and south China university propose small hole welding methods in different magnetic control modes, but the methods need to increase a magnetic control device and have limited phenomenon of improving the climbing of the cathode arc. Therefore, how to further reduce the cathodic arc climb is the key to improve TIG welding arc energy density, arc stability, and arc penetration.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a water-cooling welder to solve the problem that above-mentioned prior art exists, prevent that the cathodic arc from climbing.
In order to achieve the above object, the utility model provides a following scheme:
the utility model provides a water-cooling welder, include: the electric arc welding gun comprises a gun body, an electrode rod and an end water cooling body, wherein the gun body is sleeved outside the electrode rod, one end of the electrode rod is an electric arc bearing part, the electric arc bearing part extends out of one end of the gun body, the electric arc bearing part is conical, and the electric arc bearing part is used for generating and bearing electric arcs; the end water cooling body is in a sleeve shape, the end water cooling body is sleeved on the electric arc bearing part, and the tip of the electric arc bearing part extends out of the end water cooling body; and an insulating layer is arranged outside the end water cooling body.
Preferably, the gun body comprises a middle water cooling body and an insulating air screen; the middle part water-cooling body cover is located on the electrode bar, insulating gas sieve cover is located the middle part water-cooling body is external, insulating gas sieve with form annular gas passageway between the middle part water-cooling body, annular gas passageway's opening encircle in around the electric arc bearing part.
Preferably, the gun body further comprises a welding gun cooling structure, the welding gun cooling structure is sleeved outside the insulating gas sieve, a water cooling channel in the welding gun cooling structure and a water cooling channel in the middle water cooling body form a water circulation passage, and the water cooling channel in the middle water cooling body is communicated with a cooling water tank.
Preferably, the body of a gun still includes the air cock, the air cock is cover tube-shape, the air cock is followed the axial cover of electrode bar is located outside the welder cooling structure, and with welder cooling structure fixed connection.
Preferably, the electrode structure further comprises a pressing cap, one end, far away from the electric arc bearing part, of the electrode rod extends out of the middle water cooling body, the pressing cap is buckled at one end, far away from the electric arc bearing part, of the electrode rod, the pressing cap is provided with an external thread, an internal thread is arranged at an opening in the upper end of the middle water cooling body, and the pressing cap is in threaded connection with the middle water cooling body.
Preferably, the outer surface of the end water cooling body is sprayed with a high-temperature resistant ceramic insulating material layer to form the insulating layer.
Preferably, the end water-cooling body is fixedly connected to the lower end of the middle water-cooling body. Preferably, the end water cooling body, the middle water cooling body and the water cooling channel in the welding gun cooling structure are communicated and can form a water circulation channel.
Preferably, the end water cooling body comprises a cylindrical sleeve portion and a tapered sleeve portion, one end of the cylindrical sleeve portion is fixedly connected to the large end of the tapered sleeve portion, the other end of the cylindrical sleeve portion is fixedly connected to the welding gun cooling structure, and the tapered sleeve portion is provided with a tapered inner cavity matched with the surface of the arc bearing portion.
The utility model discloses for prior art gain following technological effect:
the utility model provides a water-cooling welder, wherein, restrain the electric arc through the cooling effect of tip water-cooling body to electrode bar electric arc bearing part and the insulating layer on tip water-cooling body surface and climb to reach compression electric arc's effect, improve electric arc density and deflection, realize the big welding penetration of undercurrent, improve welding efficiency and reduce welding cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a water-cooled welding gun according to the present invention;
fig. 2 is a schematic structural diagram of an end water-cooling body in the water-cooling welding gun provided by the present invention;
in the figure: 1-electrode bar, 2-middle water cooling body, 3-insulating gas sieve, 4-welding gun cooling structure, 5-gas nozzle, 6-electric arc bearing part, 7-end water cooling body, 8-annular gas channel, 9-pressing cap, 10-first water cooling channel, 11-second water cooling channel and 12-insulating layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a water-cooling welder to solve the problem that prior art exists, in order to prevent that the cathodic arc from climbing.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
The utility model provides a water-cooling welder, as shown in fig. 1 ~ 2, include: the electrode comprises a gun body, an electrode rod 1 and an end water cooling body 7, wherein the gun body is sleeved outside the electrode rod 1, one end of the electrode rod 1 extends out of one end of the gun body and is an electric arc bearing part 6, the electrode rod 1 is connected with an external power supply, the electrode rod 1 is made of tungsten alloy such as a cerium tungsten electrode or a lanthanum tungsten electrode, the electric arc bearing part 6 is conical, and the electric arc bearing part 6 is used for generating and bearing electric arcs; tip water-cooling body 7 is the cover tube-shape, possess a toper inner chamber, arc bearing part 6 is located to tip water-cooling body 7 cover, stretch out in tip water-cooling body 7 of arc bearing part 6, stretch out 0 ~ 5mm, tip water-cooling body 7 is provided with insulating layer 12 outward, this device suppresses the electric arc through tip water-cooling body 7 to the cooling effect of 1 electric arc bearing part 6 of electrode bar and the insulating layer 12 on tip water-cooling body 7 surface and climbs, in order to reach compression electric arc's effect, improve electric arc density and deflection, realize the big welding penetration of undercurrent, improve welding efficiency and reduce welding cost.
Further, the gun body comprises a middle water cooling body 2 and an insulating air screen 3; insulating gas sieve 3 adopts engineering plastics PEEK to make, middle part water-cooling body 2 and tip water-cooling body 7 are made for the copper alloy, electrode bar 1 is located to middle part water-cooling body 2 cover, outside middle part water-cooling body 2 was located to insulating gas sieve 3 covers, form annular gas channel 8 between insulating gas sieve 3 and the middle part water-cooling body 2, ring gas channel 8's split ring is around electric arc supporting part 6, annular gas channel 8 communicates with external inert protection trachea, protective gas protects welding arc and molten bath with the laminar flow state all the time in welding process, insulating gas sieve 3 still plays insulating effect, prevent that the electric injury user is hindered to electrode bar 1 electricity after the circular telegram.
Further, the body of a gun still includes welder cooling structure 4, outside insulating gas sieve 3 was located to welder cooling structure 4 cover, water-cooling channel among welder cooling structure 4 and the water-cooling channel among the middle part water-cooling body 2 formed water circulation route, water-cooling channel among the middle part water-cooling body 2 be used for with cooling water tank intercommunication, further reinforcing the cooling effect and having improved user's use and experience, prevent that the overheated scald user of body of a gun, cooling water tank can cool down the processing to the cooling water.
Further, the body of a gun still includes air cock 5, air cock 5 is cover tube-shape, air cock 5 is outside welder cooling structure 4 is located to the axial cover of electrode bar 1, and with welder cooling structure 4 fixed connection, the one end threaded connection of air cock 5 is in welder cooling structure 4's one end, can adjust the length that tip water-cooling body 7 stretches out the nozzle through air cock 5 and 4 screw-thread fit's of welder cooling structure length, the length value scope is 0-10mm, air cock 5, electrode bar 1, middle part water-cooling body 2 and the equal coaxial setting of tip water-cooling body 7.
Further, still include one and compress tightly cap 9, the one end that electric arc load-bearing part 6 was kept away from to electrode bar 1 stretches out in middle part water-cooling body 2, it locates the one end that electric arc load-bearing part 6 was kept away from to electrode bar 1 to compress tightly cap 9 knot, it is provided with the external screw thread to compress tightly cap 9, the upper end opening of middle part water-cooling body 2 is provided with the internal thread, it connects on middle part water-cooling body 2 to compress tightly cap 9 threaded connection, it can closely laminate electric arc load-bearing part 6's conical surface and tip water-cooling body 7 internal conical surface to compress tightly cap 9 along the axial to screw, it compresses tightly the removable tungsten utmost point of cap 9 to unscrew, tip water-cooling body 7 is the vulnerable part, can conveniently dismantle, therefore the welding operation process is simple and fast.
Further, the outer surface of the end water cooling body 7 is sprayed with a high temperature resistant ceramic insulating material layer to form an insulating layer 12.
Further, the end water cooling body 7 is fixedly connected to the lower end of the middle water cooling body 2 and is fixed by brazing or threaded connection.
Further, the water cooling channels in the end water cooling body 7, the middle water cooling body 2 and the welding gun cooling structure 4 are all communicated and can form a water circulation channel, and particularly, the circulation mode can be set adaptively according to the structure and the size of an actual welding gun.
Furthermore, the end water cooling body 7 comprises a cylindrical sleeve part and a conical sleeve part, one end of the cylindrical sleeve part is fixedly connected to the large end of the conical sleeve part, the other end of the cylindrical sleeve part is fixedly connected into the welding gun cooling structure 4, and the conical sleeve part is provided with a conical inner cavity matched with the surface of the electric arc bearing part 6.
Further, the cone angle of the conical cavity in the end water-cooling body 7 ranges from 30 degrees to 90 degrees, and the cone angle of the arc bearing part 6 is consistent with the cone angle of the end water-cooling body 7 in size.
Furthermore, the middle water cooling body 2 can conduct electricity, and the middle water cooling body 2 can conduct electricity and is respectively connected with the electrode bar 1 and the negative electrode of the welding power supply, so that the electrode bar 1 is electrified to serve as a negative electrode to generate electric arcs.
As shown in the figure, the water cooling channel in the end water cooling body 7 is a first water cooling channel 10, and the water cooling channel in the welding gun cooling structure 4 is a second water cooling channel 11.
When the welding current is below 300A, the stiffness of the electric arc is improved through the inhibition effect on the electric arc climbing, and high-speed large-melting-depth welding can be realized; when the welding current is more than 300A, the welding heat input is increased, the effect of inhibiting the electric arc from climbing is further increased, the perforation welding under the butt joint condition of 3-12mm plates can be realized, compared with the traditional K-TIG welding, the welding speed is increased, the welding heat input is reduced, and the welding quality is improved.
The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (9)
1. A water-cooled welding gun is characterized in that: the method comprises the following steps: the electric arc welding gun comprises a gun body, an electrode rod and an end water cooling body, wherein the gun body is sleeved outside the electrode rod, one end of the electrode rod is an electric arc bearing part, the electric arc bearing part extends out of one end of the gun body, the electric arc bearing part is conical, and the electric arc bearing part is used for generating and bearing electric arcs; the end water cooling body is in a sleeve shape, the end water cooling body is sleeved on the electric arc bearing part, and the tip of the electric arc bearing part extends out of the end water cooling body; and an insulating layer is arranged outside the end water cooling body.
2. The water-cooled welding gun according to claim 1, characterized in that: the gun body comprises a middle water cooling body and an insulating air screen; the middle part water-cooling body cover is located on the electrode bar, insulating gas sieve cover is located the middle part water-cooling body is external, insulating gas sieve with form annular gas passageway between the middle part water-cooling body, annular gas passageway's opening encircle in around the electric arc bearing part.
3. The water-cooled welding gun according to claim 2, characterized in that: the gun body further comprises a welding gun cooling structure, the welding gun cooling structure is sleeved outside the insulating gas sieve, a water cooling channel in the welding gun cooling structure and a water cooling channel in the middle water cooling body form a water circulation passage, and the water cooling channel in the middle water cooling body is used for being communicated with a cooling water tank.
4. The water-cooled welding gun according to claim 3, characterized in that: the gun body still includes the air cock, the air cock is cover tube-shape, the air cock is followed the axial cover of electrode bar is located outside the welder cooling structure, and with welder cooling structure fixed connection.
5. The water-cooled welding gun according to claim 2, characterized in that: the electrode rod clamping device is characterized by further comprising a clamping cap, one end, far away from the electric arc bearing part, of the electrode rod extends out of the middle water cooling body, the clamping cap is buckled at one end, far away from the electric arc bearing part, of the electrode rod, the clamping cap is provided with external threads, an upper end opening of the middle water cooling body is provided with internal threads, and the clamping cap is in threaded connection with the middle water cooling body.
6. The water-cooled welding gun according to claim 1, characterized in that: and spraying a high-temperature-resistant ceramic insulating material layer on the outer surface of the end water cooling body to form the insulating layer.
7. The water-cooled welding gun according to claim 2, characterized in that: the end water cooling body is fixedly connected to the lower end of the middle water cooling body.
8. The water-cooled welding gun according to claim 3, characterized in that: the end water cooling body, the middle water cooling body and the water cooling channel in the welding gun cooling structure are communicated and can form a water circulation channel.
9. The water-cooled welding gun according to claim 3, characterized in that: the end water cooling body comprises a cylindrical sleeve part and a conical sleeve part, one end of the cylindrical sleeve part is fixedly connected to the large end of the conical sleeve part, the other end of the cylindrical sleeve part is fixedly connected into the welding gun cooling structure, and the conical sleeve part is provided with a conical inner cavity matched with the surface of the electric arc bearing part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120729488.7U CN214640911U (en) | 2021-04-12 | 2021-04-12 | Water-cooling welding gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120729488.7U CN214640911U (en) | 2021-04-12 | 2021-04-12 | Water-cooling welding gun |
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| Publication Number | Publication Date |
|---|---|
| CN214640911U true CN214640911U (en) | 2021-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120729488.7U Active CN214640911U (en) | 2021-04-12 | 2021-04-12 | Water-cooling welding gun |
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| CN (1) | CN214640911U (en) |
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2021
- 2021-04-12 CN CN202120729488.7U patent/CN214640911U/en active Active
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