CN114043052A - Plasma arc welding equipment - Google Patents
Plasma arc welding equipment Download PDFInfo
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- CN114043052A CN114043052A CN202111329825.4A CN202111329825A CN114043052A CN 114043052 A CN114043052 A CN 114043052A CN 202111329825 A CN202111329825 A CN 202111329825A CN 114043052 A CN114043052 A CN 114043052A
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- passivation
- welding gun
- passivation paste
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K10/00—Welding or cutting by means of a plasma
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- Arc Welding In General (AREA)
Abstract
The invention relates to the technical field of welding equipment, in particular to plasma arc welding equipment which comprises a workbench, wherein a linear driving module is used for driving a welding gun module and a passivation paste coating module to do linear motion, a support frame is fixedly connected to the linear driving module, a passivation paste leveling mechanism is fixedly arranged on the support frame, a passivation paste extruding mechanism is arranged between the passivation paste leveling mechanism and the welding gun mechanism, the passivation paste leveling mechanism and the passivation paste extruding mechanism are correspondingly arranged, the passivation paste extruding mechanism is fixedly connected to a reciprocating mechanism, the reciprocating mechanism is fixedly connected to the support frame, and the reciprocating mechanism is used for driving the passivation paste extruding mechanism to reciprocate along a straight line perpendicular to the motion direction of the welding gun module. The passivation paste coating module is arranged, so that the passivation paste can be uniformly coated on the welding seam, the coating operation of the soldering paste can be synchronously completed during welding, and the production efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of welding equipment, in particular to plasma arc welding equipment.
Background
When a stainless steel workpiece is welded by plasma arc welding equipment, stainless steel pickling passivation paste is required to be coated on a welding seam, so that yellow, blue and black welding spots and oxide scales generated after stainless steel welding and high-temperature processing are removed by the stainless steel pickling passivation paste, the corrosion resistance of the stainless steel workpiece is improved, and the surface of the stainless steel workpiece is bright as new. The existing passivation paste coating function is mostly performed manually, is difficult to adapt to the automation trend, and needs to be improved. The prior method for automatically coating the passivation paste is to integrate a passivation paste coating module on a welding gun module of a plasma arc welding device, so that the coating operation can be synchronously completed while welding; however, this approach has the following technical difficulties: because general passivation cream all need utilize extrusion device to extrude on the seam, then utilize the scraper blade to strike off, just can comprehensive cover on the seam, but when facing great seam, then need change into great model to extrusion device's ejection of compact head, make the banding lotion of extruding through large-scale number ejection of compact head thicker or wideer, cover most welding seam, because the extrusion rate to the lotion is difficult to accurate control, so can make the lotion of extruding too much too thick very easily, and the passivation cream thickness that need apply on the welding seam only need thinner one deck can, unnecessary passivation cream plays not the effect, can cause passivation cream waste so.
Disclosure of Invention
The invention aims to solve the defects that in the prior art, the extrusion speed of the paste is difficult to accurately control, the extruded paste is easy to be too thick, and the thickness of passivation paste required to be applied to a weld joint only needs a thinner layer, so that passivation paste is wasted.
In order to achieve the purpose, the invention adopts the following technical scheme:
the design is a plasma arc welding device which comprises a workbench, wherein a linear driving module is fixedly mounted on the workbench, a welding gun module and a passivation paste coating module are mounted on the linear driving module, the welding gun module corresponds to the passivation paste coating module, and the linear driving module is used for driving the welding gun module and the passivation paste coating module to do linear motion.
The welding gun module comprises a welding gun mechanism and a hanging frame, the welding gun mechanism is fixedly mounted on the hanging frame and comprises a welding gun main body, a water storage cavity and a water delivery pipe, the water storage cavity is further formed in the welding gun main body, and the welding gun main body is provided with two water delivery pipes communicated with the water storage cavity.
Preferably, passivation cream coating module includes that support frame, passivation cream strike-off mechanism, passivation cream extruding means, reciprocating motion mechanism, support frame fixed connection are on the straight line drive module, fixed mounting has passivation cream strike-off mechanism on the support frame, passivation cream strike-off mechanism and welder mechanism between be provided with passivation cream extruding means, passivation cream strike-off mechanism corresponds the setting with passivation cream extruding means, passivation cream extruding means fixed connection is on reciprocating motion mechanism, reciprocating motion mechanism fixed connection is on the support frame, reciprocating motion mechanism is used for driving passivation cream extruding means and carries out reciprocating motion along the straight line of perpendicular to welder module direction of motion.
Preferably, the reciprocating mechanism comprises a rotary drum mechanism, a connecting piece, an elastic telescopic mechanism and an air supply module, wherein the elastic telescopic mechanism and the air supply module are fixedly connected to the support frame, the rotary drum mechanism is fixedly mounted on the connecting piece, the rotary drum mechanism and the air supply module are correspondingly arranged, the connecting piece is fixedly mounted on the elastic telescopic mechanism, the air supply module is used for intermittently blowing air flow to the rotary drum mechanism and the welding gun mechanism, and the rotary drum mechanism is used for driving the connecting piece to reciprocate on the elastic telescopic mechanism along a straight line perpendicular to the movement direction of the welding gun module.
Preferably, the drum mechanism comprises a driving mechanism, a rotating shaft and a sleeve, the driving mechanism is fixedly installed on the elastic telescopic mechanism, the driving mechanism is in transmission connection with the rotating shaft, and the sleeve is coaxially and fixedly installed on the rotating shaft.
Preferably, the driving mechanism comprises a cylinder, a fixed shaft, an impeller and a communicating pipe, the cylinder is coaxially and fixedly provided with the fixed shaft, the cylinder is fixedly connected to the telescopic mechanism, the fixed shaft in the cylinder is coaxially and fixedly provided with the impeller, the outer wall of the cylinder is fixedly provided with two communicating pipes communicated with the inside of the cylinder, any one of the communicating pipes is connected with a water delivery pipe through a pipeline, and one end of the fixed shaft extends out of the cylinder and then is coaxially and fixedly connected with a rotating shaft.
Preferably, a plurality of radiating fins are fixedly mounted on the outer surface of the welding gun main body.
The plasma arc welding equipment provided by the invention has the beneficial effects that:
the passivation paste extruding mechanism is arranged on the reciprocating mechanism, so that the discharging head in the passivation paste extruding mechanism can reciprocate, and passivation paste extruded by the passivation paste extruding mechanism is distributed on a welding seam in a curve track shape, so that the discharging head with a smaller size can cover passivation paste on the surface of all welding seams, and then the passivation paste is uniformly coated on the welding seam by matching with the passivation paste leveling mechanism, so that the automation of passivation paste coating operation is realized, the coating density of the passivation paste can be controlled by only controlling the reciprocating speed of the reciprocating mechanism, and the waste of the passivation paste is less;
meanwhile, in the reciprocating mechanism, flowing cooling water in the welding gun module is used as power to drive the rotating drum mechanism to operate, and is matched with airflow intermittently blown out by the air supply module, under the Bernoulli effect, the rotating drum mechanism reciprocates in the elastic telescopic mechanism, so that the reciprocating mechanism can be operated.
Drawings
FIG. 1 is a schematic view of a plasma arc welding apparatus according to the present invention;
FIG. 2 is a schematic diagram of the major modules of a plasma arc welding apparatus according to the present invention;
FIG. 3 is a schematic view of a torch mechanism of a plasma arc welding apparatus according to the present invention;
FIG. 4 is a first schematic cross-sectional view of a torch mechanism of a plasma arc welding apparatus according to the present invention;
FIG. 5 is a schematic cross-sectional view of a torch mechanism of a plasma arc welding apparatus according to the present invention;
FIG. 6 is a schematic view of a passivation paste application module of a plasma arc welding apparatus according to the present invention;
FIG. 7 is a schematic cross-sectional view of a drum mechanism of a plasma arc welding apparatus according to the present invention;
FIG. 8 is a schematic view of a portion of the structure of FIG. 6 at A;
FIG. 9 is a schematic illustration of a passivation paste application trajectory for a plasma arc welding apparatus in accordance with the present invention;
FIG. 10 is a schematic view of the operation of the drum mechanism of a plasma arc welding apparatus according to the present invention.
In the figure: the welding gun comprises a welding gun body 1, a ceramic gasket 2, an electrode 3, an ionic gas input tube 4, a water storage cavity 5, a water delivery tube 6, an air injection cover 7, a protective gas input tube 8, a radiating fin 9, a support plate 10, a threaded column 11, a slide block 12, a threaded rod 13, a cross rod 14, a side plate 15, driving motors 16 and 17, a support frame 18, a cylinder 19, a fixed shaft 20, an impeller 21, a communicating tube 22, a rotating shaft 23, a sleeve 24, a connecting plate 25, a transverse plate 26, a limiting plate 27, a guide rod 28, a spring 29, an air supply module 30, a connecting rod 32, a scraper 33, a workpiece 34 and a welding line 35.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
Referring to fig. 1-10, a plasma arc welding device comprises a workbench 17, wherein a linear driving module is fixedly installed on the workbench 17, a welding gun module and a passivation paste coating module are installed on the linear driving module, the welding gun module and the passivation paste coating module are correspondingly arranged, the welding gun module and the passivation paste coating module are sequentially distributed along the movement direction of the linear driving module, and the linear driving module is used for driving the welding gun module and the passivation paste coating module to do linear movement, so that the passivation paste coating module performs passivation paste coating operation on a welding seam processed by the welding gun module; the linear driving module comprises a sliding block 12, a threaded rod 13, a cross rod 14, side plates 15 and a driving motor 16, the threaded rod 13 is arranged on the sliding block 12 in a penetrating mode through threads, the two ends of the threaded rod 13 are respectively and rotatably connected with the side plates 15, the side plates 15 are fixedly connected to a workbench 17, the cross rod 14 parallel to the threaded rod 13 is arranged on the sliding block 12 in a penetrating mode, the two ends of the cross rod 14 are fixedly connected to the side plates 15 respectively, and the threaded rod 13 is connected with the driving motor 16 in a transmission mode. The linear driving module drives the threaded rod 13 through the driving motor 16 to drive the sliding block 12 to move.
The welding gun module comprises a welding gun mechanism and a hanging frame, the welding gun mechanism is fixedly mounted on the hanging frame, the hanging frame comprises a supporting plate 10 and a threaded column 11, a plurality of threaded columns 11 parallel to each other are arranged on the supporting plate 10 in a penetrating mode, the top ends of the threaded columns 11 are fixedly connected to the linear driving module, nuts are mounted on the threaded columns 11 on the two sides of the supporting plate 10, and the supporting plate 10 is fixedly connected to the welding gun mechanism. The operator can adjust the height of the torch mechanism by adjusting the position of the support plate 10 on the threaded post 11. Welder mechanism includes welder main part 1, ceramic packing ring 2, electrode 3, ionic gas input tube 4, water storage chamber 5, raceway 6, jet-propelled cover 7, protective gas input tube 8, there is electrode 3 through 2 fixed mounting of ceramic packing ring in the welder main part 1, still the cover is established and is fixed with jet-propelled cover 7 in the welder main part 1, fixed protective gas input tube 8 that is linked together with inside that is equipped with on the jet-propelled cover 7, be provided with the ionic gas input tube 4 that is linked together with inside in the welder main part 1, water storage chamber 5 has still been seted up in the welder main part 1, be provided with two raceway 6 that are linked together with water storage chamber 5 in the welder main part 1. And a plurality of radiating fins 9 are fixedly arranged on the outer surface of the welding gun main body 1.
The passivation paste coating module comprises a support frame 18, a passivation paste scraping mechanism, a passivation paste extruding mechanism and a reciprocating mechanism, wherein the support frame 18 is fixedly connected to the linear driving module, the passivation paste scraping mechanism is fixedly mounted on the support frame 18, the passivation paste extruding mechanism is arranged between the passivation paste scraping mechanism and the welding gun mechanism and corresponds to the passivation paste extruding mechanism, the passivation paste scraping mechanism is used for scraping passivation paste extruded on a welding seam by the passivation paste extruding mechanism, the passivation paste extruding mechanism is fixedly connected to the reciprocating mechanism, the reciprocating mechanism is fixedly connected to the support frame 18, and the reciprocating mechanism is used for driving the passivation paste extruding mechanism to reciprocate along a straight line perpendicular to the movement direction of the welding gun module; the passivation paste leveling mechanism comprises a connecting rod 32 and a scraper 33, the scraper 33 is fixedly connected to the support frame 18 through the connecting rod 32, and an anti-sticking coating is arranged on the scraper 33; passivation cream extruding means includes stub bar 31, hose, and stub bar 31 sets up in parallel with welder main part 1, and stub bar 31 of going out has passivation cream feeding mechanism through the hose connection, and passivation cream feeding mechanism extrudes passivation cream into through the hose to stub bar 31, and passivation cream is extruded to the welding seam from stub bar 31 at last. The passivation paste extruding mechanism is fixedly arranged on the connecting piece. Since the middle of the weld is generally convex, the contact portion between the scraper 33 and the weld needs to be arc-shaped to better fit the weld.
The reciprocating mechanism comprises a rotary drum mechanism, a connecting piece, an elastic telescopic mechanism and an air supply module 30, the elastic telescopic mechanism and the air supply module 30 are both fixedly connected on the supporting frame 18, the air supply module 30 can be an electric fan which can be intermittently started and controlled by a control device, the air supply structure is very simple, but the durability is poor because the electric fan needs to be frequently started; the compressed air can be used for blowing, the on-off of the compressed air can be controlled by the electromagnetic valve, and the air supply structure is complex, but the air supply speed is high and the service life is long. The rotary drum mechanism is fixedly installed on the connecting piece and comprises a driving mechanism, a rotating shaft 23 and a sleeve 24, the driving mechanism is fixedly installed on the elastic telescopic mechanism and is in transmission connection with the rotating shaft 23, and the sleeve 24 is coaxially and fixedly installed on the rotating shaft 23. The rotary drum mechanism corresponds the setting with air supply module 30, and connecting piece fixed mounting is on elastic telescoping mechanism, and air supply module 30 is used for blowing off the air current to rotary drum mechanism and welder mechanism intermittent type nature, and rotary drum mechanism is used for driving the connecting piece and carries out reciprocating motion along the straight line of perpendicular to welder module direction of motion on elastic mechanism. The connecting piece comprises a connecting plate 25 and a transverse plate 26, and the outer side surface of the transverse plate 26 is fixedly connected to the drum mechanism through a plurality of connecting plates 25; elastic telescoping mechanism includes limiting plate 27, guide arm 28, spring 29, fixedly connected with limiting plate 27 on the lateral plate 26 medial surface, run through on the limiting plate 27 and be provided with a plurality of guide arms 28 that are parallel to each other, the equal fixed connection of one side end of guide arm 28 is on support frame 18, all fix on the opposite side end of guide arm 28 and be equipped with a stopper, all overlap on the guide arm 28 body of rod between support frame 18 and the limiting plate 27 and be equipped with a spring 29, fixed connection is on support frame 18 and limiting plate 27 respectively at the both ends of spring 29.
The above-mentioned reciprocating mechanism works on the principle that when the blowing module 30 blows air to the drum mechanism, and when the air flow contacts the surface of the rotating sleeve 24, according to the bernoulli effect, as shown in fig. 10, when the direction of the air flow at the contact is substantially the same as the rotating direction of the sleeve 24, the air flow is accelerated and the pressure is reduced, assuming that the acting force of the side air flow on the sleeve is F1, the air flow speed at the other side of the sleeve 24 is reduced and the pressure is increased, assuming that the acting force of the side air flow on the sleeve is F2, F1 is smaller than F2, so that the sleeve 24 moves to the F1 side, the drum mechanism drives the connecting member to move to the supporting frame 18 side along the guide rod 28, in the process, the limiting plate 27 compresses the spring 29, then the blowing module 30 stops blowing, the stress of the drum mechanism is reduced until the rotating mechanism disappears, in the process, the spring 29 is reset, and drives the connecting member, The drum mechanism is reset synchronously, then the air supply module 30 blows air again, and then the above operation is repeated, thereby realizing the reciprocating motion.
In this embodiment, when the operator operates the device to weld, the passivation paste coating module corresponding to the welding gun module can perform passivation paste coating operation on the welded seam, so that automation of passivation paste coating operation is realized, manual coating operation is not needed, and welding efficiency is greatly improved.
Example 2
In embodiment 1, a driving mechanism for driving the rotation shaft 23 to rotate is generally driven by using an additional power device, and referring to fig. 7, as another preferred embodiment of the present invention, the difference from embodiment 1 is that the driving mechanism includes a cylinder 19, a fixed shaft 20, an impeller 21, and a communicating pipe 22, the cylinder 19 is coaxially and fixedly installed with the fixed shaft 20, the cylinder 19 is fixedly connected to the telescopic mechanism, the fixed shaft 20 inside the cylinder 19 is coaxially and fixedly installed with the impeller 21, the outer wall of the cylinder 19 is fixedly provided with two communicating pipes 22 communicating with the inside, any one of the communicating pipes 22 is connected to one of the water pipes 6 through a pipe, and one end of the fixed shaft 20 extends out of the cylinder 19 and is coaxially and fixedly connected to the rotation shaft 23.
In this embodiment, the communicating pipe 22 is connected to the water pipe 6, so that when the welding gun mechanism is used, the impeller 21 can be driven to rotate by using the water flow cooled in the welding gun mechanism, thereby realizing the work of the driving mechanism, fully utilizing the existing power source, and achieving the effect of saving energy.
The overall workflow of the invention is as follows:
s1, connecting an ionic gas input pipe 4 on the welding gun mechanism with an ionic gas supply device, connecting a protective gas input pipe 8 on the welding gun mechanism with the protective gas supply device, connecting a motor 3 on the welding gun mechanism with a welding power supply, connecting a water pipe 6 on the welding gun mechanism with a communicating pipe 22 in a driving mechanism, and connecting the other water pipe 6 with a cooling water supply device;
connecting another communicating pipe 22 in the driving mechanism with the cooling water collecting device;
connecting a discharging head 31 in the passivation paste extruding mechanism with a passivation paste supply device through a pipeline;
s2, placing the two workpieces 34 to be welded on the workbench 17, fixing the workpieces by using a clamping mechanism, aligning the welding positions with the welding gun module, and connecting the two workpieces 34 with a welding power supply;
s3, starting the devices connected in the steps 1 and 2, starting welding, wherein during welding, the linear motion module drives the welding gun module and the passivation paste coating module to move linearly;
in the process, the passivation paste supply device extrudes passivation paste into the discharge head 31 through the hose, and the passivation paste is finally extruded from the discharge head 31 onto the welding seam 35; the cooling water supplied by the cooling water supply device into the water storage cavity of the welding gun main body 1 is input into the driving mechanism and drives the driving mechanism to drive the whole rotary drum mechanism to operate after absorbing heat; at this time, the air supply module 30 intermittently blows air flow to the rotary drum mechanism and the welding gun main body, the rotary drum mechanism drives the connecting piece to do reciprocating motion due to the Bernoulli effect and is matched with the elastic telescopic mechanism, and the connecting piece drives the discharging head 31 to do reciprocating motion, so that the extruded passivation paste is distributed on the welding line 35 in a curve track (as shown in figure 9), and can be more uniformly and comprehensively coated on the welding line 35 after being scraped by the scraper 33; the heat radiation fins 9 provided on the welding gun main body can further improve the heat radiation effect of the welding gun mechanism under the airflow intermittently blown out by the air blowing module 30.
And S4, stopping the devices after welding, checking whether the passivation paste is not coated on the welding line 35, manually coating the parts, and after the coating is finished and the passivation paste is reacted for a period of time, cleaning the passivation paste on the welding line 35.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The utility model provides a plasma arc welding equipment, includes workstation (17), its characterized in that, fixed mounting has linear drive module on workstation (17), install welder module, passivation cream coating module on the linear drive module, welder module corresponds the setting with passivation cream coating module, linear drive module is used for driving welder module, passivation cream coating module and is linear motion.
The welding gun module comprises a welding gun mechanism and a hanging frame, the welding gun mechanism is fixedly mounted on the hanging frame, the welding gun mechanism comprises a welding gun main body (1), a water storage cavity (5) and a water conveying pipe (6), the water storage cavity (5) is further formed in the welding gun main body (1), and the welding gun main body (1) is provided with two water conveying pipes (6) communicated with the water storage cavity (5).
2. The plasma arc welding device according to claim 1, wherein the passivation paste coating module comprises a support frame (18), a passivation paste leveling mechanism, a passivation paste extruding mechanism and a reciprocating mechanism, the support frame (18) is fixedly connected to the linear driving module, the passivation paste leveling mechanism is fixedly mounted on the support frame (18), the passivation paste extruding mechanism is arranged between the passivation paste leveling mechanism and the welding gun mechanism, the passivation paste leveling mechanism and the passivation paste extruding mechanism are correspondingly arranged, the passivation paste extruding mechanism is fixedly connected to the reciprocating mechanism, the reciprocating mechanism is fixedly connected to the support frame (18), and the reciprocating mechanism is used for driving the passivation paste extruding mechanism to reciprocate along a straight line perpendicular to the movement direction of the welding gun module.
3. The plasma arc welding device according to claim 2, wherein the reciprocating mechanism comprises a rotating cylinder mechanism, a connecting piece, an elastic telescopic mechanism and an air supply module (30), the elastic telescopic mechanism and the air supply module (30) are both fixedly connected to the support frame (18), the rotating cylinder mechanism is fixedly mounted on the connecting piece, the rotating cylinder mechanism is arranged corresponding to the air supply module (30), the connecting piece is fixedly mounted on the elastic telescopic mechanism, the air supply module (30) is used for intermittently blowing air flow to the rotating cylinder mechanism and the welding gun mechanism, and the rotating cylinder mechanism is used for driving the connecting piece to reciprocate on the elastic telescopic mechanism along a straight line perpendicular to the moving direction of the welding gun module.
4. A plasma arc welding device according to claim 3, characterized in that the rotating drum mechanism comprises a driving mechanism, a rotating shaft (23) and a sleeve (24), the driving mechanism is fixedly arranged on the elastic telescopic mechanism, the driving mechanism is in transmission connection with the rotating shaft (23), and the sleeve (24) is coaxially and fixedly arranged on the rotating shaft (23).
5. The plasma arc welding device according to claim 4, wherein the driving mechanism comprises a cylinder (19), a fixed shaft (20), an impeller (21) and a communicating pipe (22), the fixed shaft (20) is coaxially and fixedly installed on the cylinder (19), the cylinder (19) is fixedly connected to the telescopic mechanism, the impeller (21) is coaxially and fixedly installed on the fixed shaft (20) in the cylinder (19), two communicating pipes (22) communicated with the inside of the cylinder are fixedly arranged on the outer wall of the cylinder (19), any one of the communicating pipes (22) is connected with one water conveying pipe (6) through a pipeline, and a rotating shaft (23) is coaxially and fixedly connected after one end of the fixed shaft (20) extends out of the cylinder (19).
6. A plasma arc welding device as claimed in claim 1, wherein a plurality of heat dissipating fins (9) are also fixedly mounted on the outer surface of the torch body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111329825.4A CN114043052A (en) | 2021-11-11 | 2021-11-11 | Plasma arc welding equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111329825.4A CN114043052A (en) | 2021-11-11 | 2021-11-11 | Plasma arc welding equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114043052A true CN114043052A (en) | 2022-02-15 |
Family
ID=80208239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111329825.4A Withdrawn CN114043052A (en) | 2021-11-11 | 2021-11-11 | Plasma arc welding equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114043052A (en) |
-
2021
- 2021-11-11 CN CN202111329825.4A patent/CN114043052A/en not_active Withdrawn
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Application publication date: 20220215 |
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