CN109290665A - Welding slag clean-out assembly - Google Patents
Welding slag clean-out assembly Download PDFInfo
- Publication number
- CN109290665A CN109290665A CN201811478911.XA CN201811478911A CN109290665A CN 109290665 A CN109290665 A CN 109290665A CN 201811478911 A CN201811478911 A CN 201811478911A CN 109290665 A CN109290665 A CN 109290665A
- Authority
- CN
- China
- Prior art keywords
- welding slag
- driving motor
- spring
- lubricating cup
- welding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
- B23K9/328—Cleaning of weld torches, i.e. removing weld-spatter; Preventing weld-spatter, e.g. applying anti-adhesives
Abstract
The present invention relates to field of welding devices, and in particular to a kind of welding slag clean-out assembly, including frame body, softening component, waste oil collecting component and dreg scraping unit part；Softening component includes for containing the lubricating cup of welding slag softening oil and being fixedly connected on the ultrasonic oscillation device of lubricating cup, and lubricating cup is equipped with opening；Waste oil collecting component includes the collecting box with accommodating chamber, offers on collecting box and accommodating chamber is exposed to extraneous collection port；Dreg scraping unit part includes driving motor and spring, and one end of spring is connected to the main shaft of driving motor；Lubricating cup, collecting box and driving motor are each provided on frame body.The welding slag softening oil of lubricating cup of the invention can the welding slag on Butt welding gun softened, the ultrasonic vibration of lubricating cup can remove the welding slag adhered on welding gun simultaneously, finally welding gun is connected on the spring of dreg scraping unit part, driving motor driving spring is rotated around the axis of spring, and welding slag remaining on the arc extinguishing set and ignition tip of welding gun is struck off using spring.
Description
Technical field
The present invention relates to field of welding devices, more particularly to a kind of welding slag clean-out assembly.
Background technique
Carbon-dioxide arc welding full name shield carbon-dioxide arc welding, protective gas are that carbon dioxide (uses sometimes
The mixed gas of CO2+Ar).Due to the Special Influence of the thermophysical property of carbon dioxide gas, when using normal welding power supply,
Welding head fusing metal is not likely to form the axially free transition of balance, it usually needs using short circuit and molten drop necking down it is quick-fried it is disconnected,
Therefore, (metal inert-gas welding welding) free transitional face ratio is welded with MIG, welding slag flies
It splashes more.In weld job, welding slag is constantly accumulated and is adhered on the arc extinguishing set and ignition tip of welding gun, easily causes abnormal welding
Equipment downtime is even resulted in, strong influence is caused to production.
Therefore, welding gun needs periodically to carry out welding slag removing usually to strike off using high-speed rotating reamer in the prior art
Welding slag on welding gun, however easily there is crushing knife phenomenon when striking off the biggish welding slag of volume in reamer, has delayed a large amount of welding
Working hour.Moreover, carrying out welding slag doctoring application even with reamer, (especially arc extinguishing set and ignition tip) still remains on welding gun
Welding slag, after welding gun long-time weld job, often because arc extinguishing set or ignition tip have accumulated excessive welding slag and need frequency
Numerous replacement, increases production cost.
Summary of the invention
To solve the above-mentioned problems, the object of the present invention is to provide a kind of welding slag clean-out assemblies, to solve existing dioxy
Change the problem of carbon protects the welding slag of the welding gun of weldering to be difficult to clean off.
Based on this, the present invention provides a kind of welding slag clean-out assembly, including frame body, softening component, waste oil collecting component and
Dreg scraping unit part；The softening component includes lubricating cup for containing welding slag softening oil and the ultrasound for being fixedly connected on the lubricating cup
Wave rocking equipment, the lubricating cup are equipped with opening；The waste oil collecting component includes the collecting box with accommodating chamber, the collection
It is offered on case and the accommodating chamber is exposed to extraneous collection port；The dreg scraping unit part includes driving motor and spring, described
One end of spring is connected to the main shaft of the driving motor；The lubricating cup, collecting box and driving motor are each provided on the frame body.
Preferably, the waste oil collecting component further includes the collecting pipe for being connected to the collecting box, the collecting pipe
Free end be the collection port.
Preferably, the frame body includes pedestal and the mounting plate for being fixedly connected on the pedestal, the lubricating cup connection
In the side of the mounting plate, the other side of the mounting plate is equipped with extension board, and the free end of the extension board is to the peace
The outside of loading board extends, and the driving motor is connected to the free end of the extension board.
Preferably, the side of the mounting plate is tightly attached in the side of the collection port.
Preferably, softening component, waste oil collecting component and the dreg scraping unit part are located at the three of the mounting plate
A different sides.
Preferably, the extension board is parallel to horizontal plane setting, is offered on the extension board and run through its top surface
With the through-hole of bottom surface, the driving motor is located at the bottom surface of the extension board, and the main shaft of the driving motor passes through described lead to
Hole and the one end for being connected to the spring.
Preferably, the pedestal includes the bottom plate and column of perpendicular setting, one end of the column is connected to institute
Bottom plate is stated, the other end is connected to the mounting plate.
Preferably, the collecting box is set on the bottom plate, the collecting box and lubricating cup are located at the column
Two sides.
Preferably, the dreg scraping unit part further includes the fixing piece in rotary structure, one end connection of the spring
In the fixing piece, the fixing piece is connected to the main the tip of the axis of the driving motor, the spring, fixing piece and driving electricity
The main shaft of machine is coaxially disposed, and the diameter of the fixing piece is greater than the diameter of the main shaft of the driving motor.
Welding slag clean-out assembly of the invention, for making lubricating cup generate ultrasonic vibration, welding gun goes out ultrasonic oscillation device
Arc set and ignition tip are soaked in first in the welding slag softening oil of lubricating cup, welding slag softening oil can the welding slag on Butt welding gun carry out it is soft
Change, while the ultrasonic vibration of lubricating cup can remove the welding slag adhered on welding gun, then welding gun lift-off lubricating cup is placed in collecting box
At collection port, collecting box is used to recycle the welding slag softening oil on welding gun, is finally connected to welding gun on the spring of dreg scraping unit part, drives
Dynamic motor driven spring is rotated around the axis of spring, and welding slag remaining on the arc extinguishing set and ignition tip of welding gun is struck off using spring.
Detailed description of the invention
Fig. 1 is the schematic perspective view of the welding slag clean-out assembly of the embodiment of the present invention；
Fig. 2 is the schematic elevation view of the welding slag clean-out assembly of the embodiment of the present invention；
Fig. 3 is the schematic top plan view of the welding slag clean-out assembly of the embodiment of the present invention；
Fig. 4 is the schematic side view of the welding slag clean-out assembly of the embodiment of the present invention；
Fig. 5 is one of the partial structural diagram of the dreg scraping unit part of the welding slag clean-out assembly of the embodiment of the present invention；
Fig. 6 is the two of the partial structural diagram of the dreg scraping unit part of the welding slag clean-out assembly of the embodiment of the present invention.
Wherein, 1, frame body；11, pedestal；111, bottom plate；112, column；12, mounting plate；13, extension board；131, through-hole；2,
Soften component；21, lubricating cup；211, it is open；22, ultrasonic oscillation device；3, waste oil collecting component；31, collecting box；32, it collects
Mouthful；33, collecting pipe；4, dreg scraping unit part；41, driving motor；411, main shaft；42, spring；43, fixing piece.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
In conjunction with shown in Fig. 1 to Fig. 6, welding slag clean-out assembly of the invention, including frame body 1, softening portion are schematically showed
Part 2, waste oil collecting component 3 and dreg scraping unit part 4.As shown in Figure 1 to Figure 4, softening component 2 includes the lubricating cup for containing welding slag softening oil
21 and it is fixedly connected on the ultrasonic oscillation device 22 of lubricating cup 21, lubricating cup 21 is equipped with opening 211, ultrasonic oscillation device 22
It is located at the bottom of lubricating cup 21, ultrasonic oscillation device 22 can generate ultrasonic wave in the welding slag softening oil in lubricating cup 21, ultrasound
Acoustic pressure drastic change when wave is propagated in welding slag softening oil makes welding slag softening oil that strong cavitation and emulsion occur, and produces each second
Raw millions of small cavitation bubbles, these bubbles are hastily a large amount of under acoustic pressure effect to be generated, and constantly fierce explosion,
Generate powerful impact force and negative-pressure sucking, it is sufficient to remove obstinate welding slag from welding gun.Waste oil collecting component 3 includes having
The collecting box 31 of accommodating chamber offers on collecting box 31 and accommodating chamber is exposed to extraneous collection port 32, and collecting box 31 is for receiving
Collect the welding slag softening oil on welding gun.Dreg scraping unit part 4 includes driving motor 41 and spring 42, and one end of spring 42 is connected to driving electricity
The main shaft 411 of machine 41, driving motor 41 are able to drive spring 42 and rotate around the axis of spring 42.Wherein, lubricating cup 21, collecting box 31
It is each provided on frame body 1 with driving motor 41.
In the present embodiment, the welding gun of carbon-dioxide arc welding generates movement under the driving of mechanical arm, and then to workpiece
Implement welding operation.When the welding gun of carbon-dioxide arc welding, which needs to carry out welding slag, removes operation, mechanical arm drives welding gun movement
It is protruded into the welding slag softening oil in lubricating cup 21 to the opening 211 of lubricating cup 21, and by the arc extinguishing of welding gun set and ignition tip, ultrasonic wave
Rocking equipment 22 starts to generate ultrasonic wave in welding slag softening oil, since ultrasonic wave effect is occurred in entire welding slag softening oil
In, the surface of all objects that can be contacted with welding slag softening oil can be cleaned, and more effective to complex-shaped welding gun,
The welding slag that can not be struck off completely by mechanical means can especially be removed from welding gun.Mechanical arm drives welding gun to move to again
At the collection port 32 of collecting box 31, the welding slag softening oil sticked on welding gun drops to collecting box 31 from welding gun under gravity
In, certainly, the welding slag removed from welding gun can also fall into together collecting box 31 with the welding slag softening oil sticked on welding gun.Most
Afterwards, mechanical arm driving welding gun move at dreg scraping unit part 4, and make the free end of spring 42 protrude into welding gun arc extinguishing set and ignition tip
Between gap in, 41 driving spring 42 of driving motor rotation, the spring 42 of rotation, which can further strike off, remains in arc extinguishing set
With the welding slag on ignition tip, and since spring 42 has certain elasticity, so even the welding slag volume on welding gun is larger, bullet
Spring 42 still is able to strike off welding slag.
Further, as shown in Figures 2 to 4, frame body 1 includes pedestal 11 and the mounting plate 12 for being fixedly connected on pedestal 11.
Lubricating cup 21 is fixedly connected on the side of mounting plate 12, and the other side of mounting plate 12 is equipped with extension board 13, the freedom of extension board 13
It holds to the outside of mounting plate 12 and extends, driving motor 41 is connected to the free end of extension board 13, since driving motor 41 is operating
When can generate mechanical oscillation, extension board 13 can balance out the mechanical oscillation that driving motor 41 generates in the running, so as not to driving
The mechanical oscillation that motor 41 generates and the ultrasonic oscillation device 22 of softening component 2 interfere, and extension board 13 can also be prevented
The mechanical oscillation that only driving motor 41 generates cause the connection of lubricating cup 21 and mounting plate 12 to generate loosening (lubricating cup 21 and mounting plate 12
Between be connected by fasteners such as bolts).
As shown in Figure 3 and Figure 4, waste oil collecting component 3 further includes the collecting pipe 33 for being connected to collecting box 31, and collecting pipe 33 is
Round tube and the setting of its axis vertical, the free end of collecting pipe 33 is collection port 32, and mounting plate 12 is tightly attached in the side of collection port 32
Side.When mechanical arm driving welding gun collecting box 31 is moved to by lubricating cup 21 collection port 32 at during, be stained on welding gun
Welding slag softening oil even can inevitably drip, and the mounting plate 12 is avoided that the equipment for dropping to the component periphery from welding slag softening oil
On, cause the damage of other equipment.In addition, softening component 2, waste oil collecting component 3 and dreg scraping unit part 4 are located at mounting plate 12
Three different sides promote welding slag elimination efficiency to reduce the motion path of mechanical arm (welding gun).
As shown in Figures 4 to 6, extension board 13 is parallel to horizontal plane setting, offers on extension board 13 and runs through its top surface
With the through-hole 131 of bottom surface, driving motor 41 is located at the bottom surface of extension board 13, and the main shaft 411 of driving motor 41 passes through through-hole 131
And it is connected to one end of spring 42.Separator of the extension board 13 as spring 42 and driving motor 41, extension board 13 can prevent to weld
Remaining welding slag softening oil drops on driving motor 41 on rifle.
Specifically, the bottom plate 111 and column 112 of pedestal 11 including perpendicular setting, such as Fig. 2 and Fig. 4, the one of column 112
End is connected to bottom plate 111, and the other end is connected to mounting plate 12, and bottom plate 111 is mountable on existing welding equipment, bottom plate 111
It is connected with mounting plate 12 by column 112, due to column 112 and nisi rigid member, 22 He of ultrasonic oscillation device
The mechanical oscillation that driving motor 41 generates can not be conducted through column 112 to bottom plate 111 by mounting plate 12, and the component is avoided to generate
The normal operation of mechanical oscillation interference other equipment.Collecting box 31 is set on bottom plate 111, in collecting box 31 and collecting box 31
Welding slag softening oil increases the weight of bottom plate 111, to reduce the center of gravity of the component, and collecting box 31 and lubricating cup 21 be located at it is vertical
The two sides of column 112 are toppled over to prevent frame body 1 because of force unbalance.
Dreg scraping unit part 4 further includes the fixing piece 43 in rotary structure, and such as Fig. 5 and Fig. 6, one end of spring 42 is connected to solid
Determine part 43, fixing piece 43 is connected to the end of the main shaft 411 of driving motor 41, spring 42, fixing piece 43 and driving motor 41
Main shaft 411 is coaxially disposed, and fixing piece 43 is used to for spring 42 being mounted on the main shaft 411 of driving motor 41, and fixing piece 43
Diameter is greater than the diameter of the main shaft 411 of driving motor 41, and fixing piece 43 can also prevent the welding slag scraped on welding gun from falling into driving
In gap between the main shaft 411 of motor 41 and the shell of driving motor 41.
In conclusion welding slag clean-out assembly of the invention, ultrasonic oscillation device is used to that lubricating cup to be made to generate ultrasonic vibration,
The arc extinguishing set and ignition tip of welding gun are soaked in first in the welding slag softening oil of lubricating cup, and welding slag softening oil being capable of weldering on Butt welding gun
Slag is softened, while the ultrasonic vibration of lubricating cup can remove the welding slag adhered on welding gun, then welding gun lift-off lubricating cup is placed in
At the collection port of collecting box, collecting box is used to recycle the welding slag softening oil on welding gun, and welding gun is finally connected to dreg scraping unit part
On spring, driving motor driving spring is rotated around the axis of spring, is struck off using spring residual on the arc extinguishing set and ignition tip of welding gun
Remaining welding slag.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and replacement can also be made, these are improved and replacement
Also it should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of welding slag clean-out assembly, which is characterized in that including frame body, softening component, waste oil collecting component and dreg scraping unit part；Institute
Stating softening component includes lubricating cup for containing welding slag softening oil and the ultrasonic oscillation device for being fixedly connected on the lubricating cup,
The lubricating cup is equipped with opening；The waste oil collecting component includes the collecting box with accommodating chamber, is offered on the collecting box
The accommodating chamber is exposed to extraneous collection port；The dreg scraping unit part includes driving motor and spring, one end of the spring
It is connected to the main shaft of the driving motor；The lubricating cup, collecting box and driving motor are each provided on the frame body.
2. welding slag clean-out assembly according to claim 1, which is characterized in that the waste oil collecting component further includes being connected to
The collecting pipe of the collecting box, the free end of the collecting pipe are the collection port.
3. welding slag clean-out assembly according to claim 1, which is characterized in that the frame body includes pedestal and is fixedly connected on
The mounting plate of the pedestal, the lubricating cup are connected to the side of the mounting plate, and the other side of the mounting plate, which is equipped with, to be extended
The free end of plate, the extension board extends to the outside of the mounting plate, and the driving motor is connected to oneself of the extension board
By holding.
4. welding slag clean-out assembly according to claim 3, which is characterized in that be tightly attached to the peace in the side of the collection port
The side of loading board.
5. welding slag clean-out assembly according to claim 3, which is characterized in that the softening component, waste oil collecting component and
Dreg scraping unit part is located at three different sides of the mounting plate.
6. welding slag clean-out assembly according to claim 3, which is characterized in that the extension board is parallel to horizontal plane setting,
The through-hole for running through its top and bottom is offered on the extension board, the driving motor is located at the bottom surface of the extension board,
And the main shaft of the driving motor passes through the through-hole and is connected to one end of the spring.
7. welding slag clean-out assembly according to claim 3, which is characterized in that the pedestal includes the bottom plate of perpendicular setting
And column, one end of the column are connected to the bottom plate, the other end is connected to the mounting plate.
8. welding slag clean-out assembly according to claim 7, which is characterized in that the collecting box is set on the bottom plate, institute
It states collecting box and lubricating cup is located at the two sides of the column.
9. welding slag clean-out assembly according to claim 1, which is characterized in that the dreg scraping unit part further includes in revolving body knot
The fixing piece of structure, one end of the spring are connected to the fixing piece, and the fixing piece is connected to the main shaft of the driving motor
End, the spring, fixing piece and driving motor main shaft coaxial arrangement, and the diameter of the fixing piece be greater than the driving
The diameter of the main shaft of motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811478911.XA CN109290665A (en) | 2018-12-04 | 2018-12-04 | Welding slag clean-out assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811478911.XA CN109290665A (en) | 2018-12-04 | 2018-12-04 | Welding slag clean-out assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109290665A true CN109290665A (en) | 2019-02-01 |
Family
ID=65142674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811478911.XA Pending CN109290665A (en) | 2018-12-04 | 2018-12-04 | Welding slag clean-out assembly |
Country Status (1)
| Country | Link |
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| CN (1) | CN109290665A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115415650A (en) * | 2022-10-14 | 2022-12-02 | 天津泰正机械有限公司 | A remove welding slag mechanism for robot arc welding welder |
| CN115502530A (en) * | 2022-10-18 | 2022-12-23 | 立之力机械(广州)股份有限公司 | Liftable plasma welding machine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4805826A (en) * | 1986-09-30 | 1989-02-21 | Maruma Jysuharyo Kabushiki Kaisha | Slag removing apparatus for pad-welding machine |
| JPH06182557A (en) * | 1992-03-21 | 1994-07-05 | Iwatani Internatl Corp | Torch nozzle cleaning device for automatic welding machine |
| JPH0733465U (en) * | 1991-11-29 | 1995-06-20 | 岩谷産業株式会社 | Welding nozzle cleaning device |
| JP3018321U (en) * | 1995-05-19 | 1995-11-21 | 岩谷産業株式会社 | Nozzle cleaning device for automatic welding machine |
| US5813074A (en) * | 1994-06-17 | 1998-09-29 | Liljeholm; Christer | Apparatus for cleaning the heads of welding robots |
| CN205393761U (en) * | 2016-03-26 | 2016-07-27 | 广州大峰精密工业有限公司 | Welding robot's welding slag clearing device |
| CN209407646U (en) * | 2018-12-04 | 2019-09-20 | 广汽本田汽车有限公司 | Welding slag clean-out assembly |
-
2018
- 2018-12-04 CN CN201811478911.XA patent/CN109290665A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4805826A (en) * | 1986-09-30 | 1989-02-21 | Maruma Jysuharyo Kabushiki Kaisha | Slag removing apparatus for pad-welding machine |
| JPH0733465U (en) * | 1991-11-29 | 1995-06-20 | 岩谷産業株式会社 | Welding nozzle cleaning device |
| JPH06182557A (en) * | 1992-03-21 | 1994-07-05 | Iwatani Internatl Corp | Torch nozzle cleaning device for automatic welding machine |
| US5813074A (en) * | 1994-06-17 | 1998-09-29 | Liljeholm; Christer | Apparatus for cleaning the heads of welding robots |
| JP3018321U (en) * | 1995-05-19 | 1995-11-21 | 岩谷産業株式会社 | Nozzle cleaning device for automatic welding machine |
| CN205393761U (en) * | 2016-03-26 | 2016-07-27 | 广州大峰精密工业有限公司 | Welding robot's welding slag clearing device |
| CN209407646U (en) * | 2018-12-04 | 2019-09-20 | 广汽本田汽车有限公司 | Welding slag clean-out assembly |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115415650A (en) * | 2022-10-14 | 2022-12-02 | 天津泰正机械有限公司 | A remove welding slag mechanism for robot arc welding welder |
| CN115502530A (en) * | 2022-10-18 | 2022-12-23 | 立之力机械(广州)股份有限公司 | Liftable plasma welding machine |
| CN115502530B (en) * | 2022-10-18 | 2023-06-09 | 立之力机械(广州)股份有限公司 | Liftable plasma welding machine |
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