CN214023995U - Wire feeding control device and repairing equipment - Google Patents
Wire feeding control device and repairing equipment Download PDFInfo
- Publication number
- CN214023995U CN214023995U CN202023133174.5U CN202023133174U CN214023995U CN 214023995 U CN214023995 U CN 214023995U CN 202023133174 U CN202023133174 U CN 202023133174U CN 214023995 U CN214023995 U CN 214023995U
- Authority
- CN
- China
- Prior art keywords
- welding gun
- wire feeding
- welding
- wire
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Resistance Welding (AREA)
Abstract
The utility model provides a send a controlling means and repair equipment, workstation top suspension has the welding gun seat, and welding gun is arranged to the welding gun seat, and welding gun includes the welding gun pole and the welding gun mouth that welding gun pole tip formed, and the cover is equipped with and is used for controlled ground to send the welding wire to the wire feeding pipe of welding gun mouth below on the welding gun pole, and send a controlling means to include: a control box formed below the workbench, wherein: a wire feeding motor connected with a wire feeding pipe arranged on the workbench; the motor driving circuit is used for driving the wire feeding motor to operate, wherein the wire feeding motor is used for controlling the welding wire in the wire feeding pipe to be output to the position below the welding gun nozzle; the wire feeding control device also comprises a display which is formed on one side of the workbench and is connected with the control box, and the display is used for responding to the first target input to control the motor driving circuit to drive the wire feeding motor to operate. The utility model provides an among the prior art welding material can't in time carry to welding gun mouth department and lead to the problem of repair efficiency reduction of restoration type cold welding machine.
Description
Technical Field
The utility model relates to a cold welding machine send a control field, more specifically relate to a send a controlling means and repair equipment.
Background
Cold welding is a process that applies mechanical, molecular, or electrical forces to cause the weld material to diffuse to the surface of the tool. The cold welding machines can be classified into build-up welding type cold welding machines, sheet metal repair type cold welding machines, and welding wire rod cold welding machines. The former two are used for repairing the small defects of abrasion, scratch, air hole, sand hole and the like on the surface of metal and casting, and the latter is mainly used for welding non-ferrous metal wires such as silver wires, copper wires, aluminum wires and the like.
When the repair type cold welding machine is used for repairing target equipment, welding materials cannot be timely conveyed to a welding gun nozzle, and therefore the repair efficiency of the repair type cold welding machine is reduced.
In view of the above, there is a need for an improved repair type cold welding machine in the prior art to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to disclose a send silk controlling means and repair equipment to solve among the prior art welding material can't in time carry to welding gun mouth department and lead to the problem of repair efficiency reduction of restoration type cold welding machine.
In order to achieve the above object, the utility model provides a wire feed control device, workstation top suspension has the welding gun seat, welder has been arranged to the welding gun seat, welder include the welding gun pole and the welding gun mouth that welding gun pole tip formed, wherein, the cover is equipped with on the welding gun pole and is used for controlled ground to send the welding wire to send the silk pipe of welding gun mouth below, it includes to send a wire control device:
a control box formed below the workbench, wherein:
a wire feeding motor connected with a wire feeding pipe arranged on the workbench;
the motor driving circuit is used for driving the wire feeding motor to operate, wherein the wire feeding motor is used for controlling the welding wire in the wire feeding pipe to be output to the position below the welding gun nozzle;
the wire feeding control device also comprises a display which is formed on one side of the workbench and is connected with the control box, and the display is used for responding to a first target input to control the motor driving circuit to drive the wire feeding motor to operate.
As a further improvement of the present invention, further comprising a control circuit connected to the motor driving circuit and to the display for responding to the first target input control the motor driving circuit drives the wire feeding motor to operate.
As a further improvement of the utility model, the utility model also comprises a power circuit;
and the rectification filter circuit is connected with the control circuit and is used for rectifying and filtering the signal output by the power supply circuit and then sending the signal to the control circuit.
As a further improvement of the present invention, the control circuit is configured as a circuit composed of a single chip microcomputer or a programmable controller.
As a further improvement of the present invention, the system further comprises a welding gun motor connected to the display for responding to the second target input operation of the display to control the welding gun to operate.
As a further improvement of the present invention, the welding gun motor is connected to the motor drive circuit, and the motor drive circuit responds to the second target input control operation of the welding gun motor.
The utility model also provides a repair equipment, include:
the mounting plates are arranged on the workbench in a transverse mode, are parallel to each other and are arranged at intervals, and a supporting plate is longitudinally arranged on each mounting plate;
the welding gun device comprises a transverse support, a screw rod, a welding gun seat and a welding gun, wherein the transverse support is transversely arranged on the same side of at least two support plates, the screw rod is transversely provided with the screw rod, the welding gun seat is used for controllably moving along the length direction of the screw rod, and the welding gun is arranged on the welding gun seat; and the number of the first and second groups,
the wire feeding control device.
As a further improvement, the welding gun rod is sleeved with an arc striking sleeve ring, and the arc striking sleeve ring is internally provided with a clamping piece for clamping the welding gun rod.
As a further improvement of the present invention, a plurality of first mounting holes are formed in the support plate and spaced apart in the longitudinal direction and used for mounting the lateral support to adjust the longitudinal position of the lateral support, and the first mounting holes in the adjacent support plates correspond to each other.
Compared with the prior art, the beneficial effects of the utility model are that:
therefore, the wire feeding control device of the embodiment controls the motor driving circuit to drive the wire feeding motor to operate through the first target input formed on the display, so as to control the wire feeding pipe to output the welding wire to the lower part of the welding gun nozzle through the operation of the wire feeding motor, and ensure that the welding gun nozzle can weld the target equipment through the welding wire fed by the wire feeding pipe. Therefore, the wire feeding motor is automatically controlled to drive the wire feeding pipe to feed welding wires to the welding gun nozzle, the repair efficiency of target equipment can be effectively improved, and the problem that in the prior art, welding materials cannot be timely conveyed to the welding gun nozzle to cause the repair efficiency of a repair type cold welding machine to be reduced is solved.
Drawings
Fig. 1 is a schematic perspective view of a repair device according to an embodiment of the present invention;
fig. 2 is a schematic perspective view of a repair device according to another embodiment of the present invention;
fig. 3 is a schematic perspective view of a support plate according to an embodiment of the present invention;
fig. 4 is a schematic front view of a support plate of an embodiment of the present invention;
FIG. 5 is a schematic enlarged view at A in FIG. 1;
fig. 6 is a schematic block diagram of an arc striking collar according to an embodiment of the present invention;
fig. 7 is a schematic circuit structure block diagram of the internal arrangement of the control box according to an embodiment of the present invention.
Detailed Description
The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that the functions, methods, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", "positive", "negative", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Please refer to fig. 1 to 7, which illustrate a specific embodiment of the repairing apparatus of the present invention.
The repair apparatus of the present embodiment includes a frame 100, the frame 100 being provided with a table 10, and a wire feeder being disposed on the table 10.
The repair apparatus of the present embodiment includes: the mounting structure comprises at least two mounting plates 11 transversely arranged on a workbench, wherein the at least two mounting plates 11 are parallel to each other and are arranged at intervals, and a support plate 12 is longitudinally arranged on each mounting plate 11; the transverse support 13 is transversely arranged on the same side of the at least two support plates 12, the transverse support 13 is transversely provided with a screw rod 131, a welding gun seat 141 which is used for being controlled to move along the length direction of the screw rod 131 is arranged on the screw rod 131, and a welding gun 142 is arranged on the welding gun seat 141. The welding gun 142 includes a welding gun bar 1421 and a welding gun mouth 1422 formed at the end of the welding gun bar 1421, wherein the welding gun bar 1421 is sleeved with a wire feeding tube 16 for controllably feeding a welding wire below the welding gun mouth 1422.
Specifically, the wire feed control device of the present embodiment includes: a control box 60 formed below the work table, a power supply circuit 61 being arranged in the control box 60; the rectification filter circuit 62 is used for rectifying and filtering the signal output by the power supply circuit and sending the signal to the control circuit 63; and a control circuit 63, and the control circuit 63 may be configured as a circuit constituted by a single chip microcomputer (e.g., an STC series single chip microcomputer, a 51 series single chip microcomputer, or the like) or a programmable controller (e.g., FX3U series PLC).
A motor driving circuit 64 connected with the control circuit 63 is also arranged in the control box 60; and a wire feed motor 65 coupled to wire feed tube 16 (wire feed motor 65 may be coupled to wire feed tube 16 by a hose 161). The control circuit 63 controls the motor driving circuit 64 to drive the wire feeding motor 65 to operate, so as to control the wire feeding tube 16 to feed the welding wire under the action of the operation of the wire feeding motor 65 to the position below the gun nozzle 1422. The power supply circuit 61 supplies power to the rectifier filter circuit 62, the control circuit 63, and the motor drive circuit 64, respectively. The wire feed control assembly also includes a display 66 formed on one side of the table 10 and coupled to the control box 60 for controlling the motor drive circuit 64 to drive the wire feed motor 65 in operation in response to a first target input. The wire feeding control device of the embodiment further comprises: a torch motor 67 is coupled to the display 66 for operation in response to a second target input from the display 66 to control operation of the torch 142. Wherein the torch motor 67 is coupled to the motor drive circuit 64, and the motor drive circuit 64 is configured to control the operation of the torch motor 67 in response to a second target input.
It can be seen that the wire feed control apparatus of the present embodiment controls the motor driving circuit 64 to drive the wire feed motor 65 to operate through the first target input formed on the display 66, so as to control the wire feed tube 16 to output the welding wire below the gun nozzle 1422 through the operation of the wire feed motor 65, and thus to ensure that the gun nozzle 1422 can weld the target device through the welding wire fed through the wire feed tube 16. Thus, the wire feeding motor 65 is automatically controlled to drive the wire feeding pipe 16 to feed welding wires to the welding gun nozzle 1422, so that the repair efficiency of target equipment can be effectively improved, and the problem that the repair efficiency of a repair type cold welding machine is reduced because welding materials cannot be timely conveyed to the welding gun nozzle in the prior art is solved.
The specific process of rectifying and filtering the signal output by the power circuit by the rectifying and filtering circuit 62 and sending the signal to the control circuit 63, the process of controlling the motor driving circuit 64 by the control circuit 63 to drive the wire feeding motor 65 to operate, and the specific process of feeding the welding wire by the wire feeding motor 16 through the operation of the wire feeding motor 65 are well known to those skilled in the art and will not be described in detail herein. Moreover, the specific process of the user touching the display 66 by touch or the like to form the first target input or the second target input, the specific process of the control circuit 63 controlling the motor driving circuit 64 to drive the wire feeding motor 65 to operate based on the first target input, and the specific process of the control circuit 63 controlling the motor driving circuit 64 to drive the welding gun motor 67 to operate based on the second target input are well known in the art, and will not be described in detail herein.
The repairing device of the embodiment drives the welding gun seat 141 arranged on the lead screw 131 to move along the transverse direction by correspondingly and longitudinally arranging the support plates 12 on at least two mounting plates 11 which are arranged on the workbench 10, are parallel to each other and are arranged at intervals in the transverse direction, and are controlled to rotate through the lead screw 131 arranged in the transverse support 13 transversely arranged on the same side of at least two support plates 12, so as to adjust the transverse position of the welding gun 142 in the welding gun seat.
In the above embodiment, the support plates 12 are formed with a plurality of first mounting holes 121 arranged at intervals in the longitudinal direction and used to mount the lateral brackets 13 to adjust the longitudinal position of the lateral brackets 13, and the first mounting holes 121 on adjacent support plates 12 correspond. The mounting plate 11 is mounted on the table 10 in a target direction, which may be perpendicular to the lateral direction and the longitudinal direction, respectively. One side of the transverse support 13 is provided with a driving member (not shown) for driving the screw 131 to rotate so as to drive the welding gun holder 141 to move transversely. The driving member is configured as a driving motor or a driving cylinder to control the screw 131 to rotate through the driving motor or the driving cylinder so as to drive the welding gun seat 141 to move in the transverse direction. The specific process of controlling the driving motor or the driving cylinder to control the screw 131 to rotate is well known to those skilled in the art, and will not be described in detail.
The repairing device of the embodiment drives the welding gun seat 141 arranged on the lead screw 131 to move along the transverse direction by correspondingly and longitudinally arranging the support plates 12 on at least two mounting plates 11 which are arranged on the workbench 10, are parallel to each other and are arranged at intervals in the transverse direction, and are controlled to rotate through the lead screw 131 arranged in the transverse support 13 transversely arranged on the same side of at least two support plates 12, so as to adjust the transverse position of the welding gun 142 in the welding gun seat. Further, the horizontal support 13 is mounted through the plurality of first mounting holes 121 formed in the support plate 12 and arranged at intervals in the vertical direction, and the vertical position of the welding torch 142 of the torch holder 141 can be adjusted by adjusting the position of the horizontal support 13 in the vertical direction. Thus, the position of the welding gun in the welding gun seat can be flexibly adjusted in different directions to ensure that the welding gun 142 can effectively repair a target device (not shown in the figure). Therefore, the problem that the position of a welding gun cannot be flexibly adjusted to influence the repairing effect of target equipment in the prior art is solved.
It should be noted that the supporting plate 12 of the present embodiment is generally located on one side of the workbench 10, and the protection door 15 is installed on the other side of the workbench 10. Before the repair device repairs a target device (not shown), the target device is moved to a position between the adjustment assembly and the guard door 15 in the work table 10.
In the present embodiment, the "lateral direction" refers to the x-axis direction in fig. 1, the "longitudinal direction" refers to the z-axis direction in fig. 1, and the "target direction" refers to the y-axis direction in fig. 1.
Further, a target side of the support plate 12, which is opposite to a side of the support plate 12 on which the lateral support 13 is disposed, is formed with a stabilizing plate 122 forming a predetermined angle with the support plate 12, and the stabilizing plate 122 is gradually contracted from bottom to top. Wherein the target side is arranged opposite to the lateral support 13 on the side of the support plate 12. The preset angle is configured to be any angle value of 30-150 degrees. As such, the stability of the support plate 12 is improved by the provision of the stabilizing plate 122 constituting a predetermined angle with the support plate 12. To further improve the stability of the support plate 12, the predetermined angle is configured to be about 90 degrees, i.e., the stabilizing plate 122 is disposed approximately perpendicular to the support plate 12.
The bottom of the support plate 12 is formed with a mounting base 123, and the stabilizing plate 122 is formed on the mounting base 123. In one embodiment, the mounting plate 11 is formed with a plurality of second mounting holes 111, the plurality of second mounting holes 111 are spaced apart in a length direction of the mounting plate 11, and the mounting base 123 is connected to the mounting plate 11 through the second mounting holes 111. The mounting base 123 is formed with a third mounting hole 111' opposite to the second mounting hole 111. Thus, the mounting base 123 is fixed on the mounting plate 11 through the second mounting hole 111 and the corresponding third mounting hole 111', so that the mounting base 123 is connected with the mounting plate 11. In addition, the mounting base 123 and the mounting plate 11 are fixedly connected through the second mounting holes 111 and the corresponding third mounting holes 111' at different positions on the mounting plate 11, so that the position of the mounting base 123 can be adjusted in the y direction, and thus the position of the welding gun in the welding gun seat can be adjusted in the y direction, and the flexibility of adjusting the position of the welding gun can be further improved.
In another embodiment, a slot for arranging the mounting base 123 and adjusting the position of the mounting base 123 in the length direction of the mounting plate 11 is formed on the mounting plate 11. The mounting base 123 is formed with a snap-fit portion located in the snap-fit groove. Thus, the installation base 123 is connected with the installation base 11 through the matching connection between the clamping groove formed by the installation base 11 and the clamping portion formed by the installation base 123. The matching connection between the card slot formed by the mounting plate 11 and the card portion formed by the mounting base 123 is common knowledge in the art, and is not described in detail here.
Further, the welding gun holder 141 is provided with an arc voltage sensor 171, and an arc striking collar 172 which is close to the welding gun tip 1422 and connected to the arc voltage sensor 171 is sleeved on the welding gun rod 1421. Specifically, one end of the arc striking collar 172 is connected to an insulating sleeve 173 accommodating a lead wire 174, and a terminal of the insulating sleeve 173 is formed with a tab 175 communicating with the lead wire 174. The arc pressure sensor 171 may be connected to the arc striking collar 172 through a thimble 1423. A fixing plate 1424 for fixing the torch bar 1421 may be disposed on the thimble 1423. The arc initiation collar 172 is configured as a metal ring.
A clamping member 176 for clamping the gun bar 1421 is disposed in the striking collar 172. The clamp 176 is configured as a plurality of projecting pieces that are arranged on the inner wall of the ignition collar 172 and project toward the longitudinal axis direction of the ignition collar. The protrusion is configured as a metal sheet with a triangular protrusion, and a fixing piece 1761 attached to the inner wall of the arc striking sleeve 172 is formed at both ends extending from the protrusion of the protrusion to the inner wall of the arc striking sleeve 172 in both lateral directions.
So set up, this embodiment makes the cover establish at the start of a welding torch lantern ring 172 centre gripping welding torch pole 1421 of welding torch pole 1421 through the holder 176 that sets up in start of a welding torch lantern ring 172 to strengthen the fixed between start of a welding torch pole 1421 and the start of a welding torch lantern ring 172, prevent to lead to the welder to the repair position of target equipment to take place the dislocation because the start of a welding torch lantern ring is fixed not firm with the welding torch pole, effectively make welding material ignition arc through start of a welding torch lantern ring 172 simultaneously, in order to improve the repair efficiency of repair equipment to target equipment. Therefore, the problems that the repair type cold welding machine in the prior art cannot accurately align the repair position, so that the repair position of the target equipment is staggered, and the repair type cold welding machine cannot enable welding materials to effectively ignite electric arcs to influence the repair efficiency are solved.
The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (9)
1. The utility model provides a wire feed control device, its characterized in that, the workstation top suspension has the welding gun seat, welding gun is arranged to the welding gun seat, welding gun include the welding gun pole and the welding gun mouth that welding gun pole tip formed, wherein, the cover is equipped with on the welding gun pole and is used for sending the welding wire to controlledly the wire feeding pipe of welding gun mouth below, wire feed control device includes:
a control box formed below the workbench, wherein:
a wire feeding motor connected with a wire feeding pipe arranged on the workbench;
the motor driving circuit is used for driving the wire feeding motor to operate, wherein the wire feeding motor is used for controlling the welding wire in the wire feeding pipe to be output to the position below the welding gun nozzle;
the wire feeding control device also comprises a display which is formed on one side of the workbench and is connected with the control box, and the display is used for responding to a first target input to control the motor driving circuit to drive the wire feeding motor to operate.
2. The wire feed control device of claim 1, further comprising:
and the control circuit is connected with the motor driving circuit and the display and is used for responding to the first target input to control the motor driving circuit to drive the wire feeding motor to operate.
3. The wire feed control device of claim 2, further comprising:
a power supply circuit;
and the rectification filter circuit is connected with the control circuit and is used for rectifying and filtering the signal output by the power supply circuit and then sending the signal to the control circuit.
4. The wire feed control device of claim 2,
the control circuit is configured to be a circuit composed of a single chip microcomputer or a programmable controller.
5. The wire feed control device of claim 1, further comprising:
and the welding gun motor is connected with the display and is used for responding to the second target input of the display to operate so as to control the welding gun to work.
6. The wire feed control device of claim 5,
the welding gun motor is connected with the motor driving circuit, and the motor driving circuit responds to the second target input to control the welding gun motor to operate.
7. A repair device, comprising:
the mounting plates are arranged on the workbench in a transverse mode, are parallel to each other and are arranged at intervals, and a supporting plate is longitudinally arranged on each mounting plate;
the welding gun device comprises a transverse support, a screw rod, a welding gun seat and a welding gun, wherein the transverse support is transversely arranged on the same side of at least two support plates, the screw rod is transversely provided with the screw rod, the welding gun seat is used for controllably moving along the length direction of the screw rod, and the welding gun is arranged on the welding gun seat; and the number of the first and second groups,
the wire feed control device of any one of claims 1-6.
8. The patching device of claim 7,
the welding gun rod is sleeved with an arc striking lantern ring, and a clamping piece used for clamping the welding gun rod is arranged in the arc striking lantern ring.
9. The patching device of claim 7,
the support plates are provided with a plurality of first mounting holes which are arranged at intervals in the longitudinal direction and used for mounting the transverse supports to adjust the longitudinal position of the transverse supports, and the first mounting holes on the adjacent support plates correspond to the first mounting holes on the adjacent support plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023133174.5U CN214023995U (en) | 2020-12-23 | 2020-12-23 | Wire feeding control device and repairing equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023133174.5U CN214023995U (en) | 2020-12-23 | 2020-12-23 | Wire feeding control device and repairing equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214023995U true CN214023995U (en) | 2021-08-24 |
Family
ID=77342721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023133174.5U Active CN214023995U (en) | 2020-12-23 | 2020-12-23 | Wire feeding control device and repairing equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214023995U (en) |
-
2020
- 2020-12-23 CN CN202023133174.5U patent/CN214023995U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2379271B1 (en) | Double wire gmaw welding torch assembly and process | |
| CN214023996U (en) | Wire feeding mechanism | |
| CN105689863B (en) | Automatic wire welding and guiding device | |
| CN214023995U (en) | Wire feeding control device and repairing equipment | |
| CN105750707B (en) | Robot tungsten electrode gas shielded welding system | |
| CN103904525A (en) | Automatic welding device for DC head | |
| CN203725967U (en) | Device for welding bimetal-bushing bottom box bracket | |
| CN210359669U (en) | Automatic tin soldering equipment based on manipulator | |
| CN114654050A (en) | Repair cold welding equipment | |
| KR102044965B1 (en) | Orbital TIG welding apparatus with two torches including a separated AVC axis | |
| CN107262924A (en) | A kind of multi-vehicle-type frock apparatus for fast switching | |
| JP2007090410A (en) | Submerged arc welding apparatus | |
| CN214023991U (en) | Repairing device | |
| CN111482675B (en) | Semi-circular arc oscillating type electric arc CMT additive manufacturing printing device | |
| CN103495790A (en) | Automatic brazing device of iron core of electromagnetic valve | |
| CN211804280U (en) | Automatic soldering tin equipment | |
| JP2019155406A (en) | Welding support system and welding support method | |
| CN105728924B (en) | Prickle plate welding equipment | |
| CN105414828A (en) | Welding device used for welding work of flange adapter | |
| CN214024317U (en) | Adjustment assembly for a prosthetic device | |
| CN215238813U (en) | Robot for welding water purifier bracket | |
| JP2010082674A (en) | Robot arc welding system and welding operation method of the same | |
| CN216706499U (en) | Composite welding device for storage battery wiring terminal | |
| JP6046008B2 (en) | Stationary welding equipment | |
| JP6349569B2 (en) | Self shielded arc welding machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |