CN115971171A - Welding part and annular channel inner wall cleaning method thereof - Google Patents
Welding part and annular channel inner wall cleaning method thereof Download PDFInfo
- Publication number
- CN115971171A CN115971171A CN202310012099.6A CN202310012099A CN115971171A CN 115971171 A CN115971171 A CN 115971171A CN 202310012099 A CN202310012099 A CN 202310012099A CN 115971171 A CN115971171 A CN 115971171A
- Authority
- CN
- China
- Prior art keywords
- cleaning
- annular cavity
- workpiece body
- cleaning balls
- balls
- 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
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 95
- 238000003466 welding Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000002893 slag Substances 0.000 claims abstract description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005488 sandblasting Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Landscapes
- Cleaning By Liquid Or Steam (AREA)
Abstract
The application discloses a welding part and a cleaning method for the inner wall of an annular channel of the welding part, wherein the cleaning method for the inner wall of the annular channel comprises the following steps: after the workpiece body is fixed on the rotating device, the direction of the port of the annular cavity is adjusted to avoid the cleaning ball from leaking out; checking the state of the cleaning balls to avoid the mutual jamming of the cleaning balls; when all the cleaning balls are in a free moving state, the rotating device drives the workpiece body to rotate in a reciprocating manner, so that the cleaning balls rub the annular cavity; after the workpiece body stops rotating, the high-pressure water gun flushes water towards the inside of the annular cavity so as to clean slag in the annular cavity. This application realizes the high-efficient slagging-off to welding spare annular cavity inner wall through above-mentioned method.
Description
Technical Field
The application relates to the technical field of slag removal of welding parts, in particular to a welding part and a cleaning method for the inner wall of an annular channel of the welding part.
Background
In the welding process of a welding part, welding beading and welding slag certainly exist, meanwhile, rust spots are generated due to long-term corrosion, generally, the external welding slag is mostly removed by adopting the processes of manual knocking, sand blasting and the like, and the welding seam in the large-sized tubular part can also be removed by adopting the processes of manual knocking, sand blasting, a high-pressure water gun and the like. However, in the existing slag removal mode, no matter knocking or high-pressure water guns and a welding line machine with steel wires are adopted for scraping, welding parts with annular cavities cannot be completely removed, and the pressure of the high-pressure water guns is not enough to remove welding beading on the surfaces, so that the defects of the clean welding surfaces cannot be removed; the knocking mode can only remove welding slag within a manual operation range, but cannot remove a cavity in the part; the welding machine steel wire and the sand blasting removal method also have the defect that small cavities in parts cannot be reached.
Therefore, how to provide a method for removing welding slag in an annular channel of a welding part is a problem to be solved by the technical personnel in the field.
Disclosure of Invention
The application aims to provide a welding part and a cleaning method for the inner wall of an annular channel of the welding part, and efficient slag removal of the welding part can be realized.
In order to achieve the above object, the present application provides a method for cleaning an inner wall of an annular channel, which is applied to an annular cavity of a welded component, and comprises: the weldment includes: the device comprises a workpiece body, a rotating device, a plurality of cleaning balls and a high-pressure water gun; the surface of the workpiece body is provided with a notch, the inside of the workpiece body is provided with an annular cavity, and openings at two ends of the annular cavity are respectively arranged on two cross sections of the notch; the clearance ball sets up in the toroidal cavity, and rotary device is used for driving the work piece body and rotates, and the high-pressure squirt is used for spraying water towards the inside of toroidal cavity, and the clearance method includes:
after the workpiece body is fixed on the rotating device, the direction of the port of the annular cavity is adjusted to avoid the cleaning ball from leaking out;
checking the state of the cleaning balls to avoid the mutual jamming of the cleaning balls;
when all the cleaning balls are in a free moving state, the rotating device drives the workpiece body to rotate in a reciprocating manner, so that the cleaning balls rub the annular cavity;
after the workpiece body stops rotating, the high-pressure water gun flushes water towards the inside of the annular cavity so as to clean slag in the annular cavity.
In some embodiments, checking the cleaning ball status to avoid the cleaning balls from jamming against each other includes: and repeatedly inclining the workpiece body until the cleaning balls are separated.
In some embodiments, when all the cleaning balls are in a free-moving state, the rotating device drives the workpiece body to rotate back and forth, so that the step of rubbing the cleaning balls against the annular cavity comprises: the rotating strength of the workpiece body is controlled to meet the requirement that the cleaning ball can move in the whole annular cavity and does not fall out of the annular cavity.
A welding part is suitable for the cleaning method of the inner wall of the annular channel, and is characterized by comprising the following steps: the cleaning device comprises a workpiece body, a rotating device, a plurality of cleaning balls and a high-pressure water gun;
the surface of the workpiece body is provided with a notch, the inside of the workpiece body is provided with an annular cavity, and openings at two ends of the annular cavity are respectively arranged on two cross sections of the notch; the cleaning ball is arranged in the annular cavity, the rotating device is used for driving the workpiece body to rotate, and the high-pressure water gun is used for spraying water towards the inside of the annular cavity.
In some embodiments, the cleaning ball has a diameter less than the radius of the annular cavity
In some embodiments, the cleaning balls are provided as iron sand
In some embodiments, the rotating means comprises: the clamping piece is arranged on the rotating shaft; the clamping piece is used for fixing and clamping the workpiece body, and the rotating shaft is used for driving the rotating shaft to rotate.
Compared with the background art, the annular channel inner wall cleaning method comprises the following steps: after the workpiece body is fixed on the rotating device, the direction of the port of the annular cavity is adjusted to avoid the cleaning ball from leaking out; checking the state of the cleaning balls to avoid the mutual jamming of the cleaning balls; when all the cleaning balls are in a free moving state, the rotating device drives the workpiece body to rotate in a reciprocating manner, so that the cleaning balls rub the annular cavity; after the workpiece body stops rotating, the high-pressure water gun flushes water towards the inside of the annular cavity so as to clean slag in the annular cavity. This application realizes the high-efficient slagging-off to welding spare annular cavity inner wall through above-mentioned method.
The application also provides a welding piece, which has the beneficial effects that the welding piece is not unfolded.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only the embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flowchart illustrating steps of a method for cleaning an inner wall of an annular channel according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural view of a weldment provided in the embodiments of the present application;
fig. 3 is a schematic structural diagram of a rotating apparatus according to an embodiment of the present disclosure.
Wherein:
1-a workpiece body, 2-a cleaning ball, 3-an annular cavity, 4-a clamping piece, 5-a rotating disc and 6-a motor.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In order to enable those skilled in the art to better understand the scheme of the present application, the present application will be described in further detail with reference to the accompanying drawings and the detailed description.
Referring to the accompanying drawings 1 and 2 in the specification, fig. 1 is a flow chart of steps of a cleaning method for an inner wall of an annular channel provided by an embodiment of the application, and fig. 2 is a schematic structural diagram of a welding part provided by the embodiment of the application, including the cleaning method for the inner wall of the annular channel applied to an annular cavity of the welding part, wherein the welding part comprises: the cleaning device comprises a workpiece body 1, a rotating device, a plurality of cleaning balls 2 and a high-pressure water gun; the surface of the workpiece body 1 is provided with a notch, the inside of the workpiece body is provided with an annular cavity 3, and openings at two ends of the annular cavity 3 are respectively arranged on two sections of the notch; clearance ball 2 sets up in toroidal cavity 3, and rotary device is used for driving work piece body 1 and rotates, and the high-pressure squirt is used for spraying water towards 3 insides of toroidal cavity. The cleaning method comprises the following steps:
step S1: after the workpiece body 1 is fixed on the rotating device, the direction of the port of the annular cavity 3 is adjusted to avoid the cleaning ball 2 from leaking;
step S2: checking the state of the cleaning balls 2 to avoid the mutual locking of the cleaning balls 2;
and step S3: when all the cleaning balls 2 are in a free moving state, the rotating device drives the workpiece body 1 to rotate in a reciprocating manner, so that the cleaning balls 2 rub the annular cavity 3;
and step S4: after the workpiece body 1 stops rotating, the high-pressure water gun flushes water towards the inside of the annular cavity 3 so as to clean the slag inside the annular cavity 3.
Because the cleaning balls 2 have certain rigidity and weight, the cleaning balls 2 sink to the bottom in the annular cavity 3 due to gravity in a static state. And after confirming that the piling of the cleaning balls 2 can not be mutually clamped, the workpiece body 1 can be rotated in a reciprocating way through the rotating device, so that the cleaning balls 2 in the workpiece body vibrate, collide and rub the inner wall of the annular cavity 3, and welding slag which is difficult to contact in the workpiece body is removed.
And finally, spraying high-pressure water into the annular cavity 3 through a high-pressure water gun, wherein the high-pressure water drives the cleaning ball 2 to move to a certain degree, so that the welding slag is flushed out from the other port of the annular cavity 3. It should be noted that high-pressure rivers can make the vibrations of clearance ball 2 and break away from the contact with 3 inner walls of toroidal cavity, but because of clearance ball 2 quality is higher under the conventional conditions, only the welding slag can be washed out, therefore high-pressure rivers still can play the effect of supplementary slagging-off, will not follow the inner wall and rub the perfect welding slag secondary impact of getting rid of and take out. After confirming that deslagging is finished, pouring out the cleaning ball 2.
The method has the advantages of convenient deslagging, easy operation, better deslagging cost and applicability than the conventional deslagging method, and solves the deslagging problem of positions which are difficult to reach inside the welding part.
Further, aiming at the step S2, the state of the cleaning ball 2 is checked, so as to avoid the mutual locking between the cleaning balls 2, which can be specifically: utilize rotary device to slope work piece body 1 repeatedly, utilize inside sight glass to stretch into annular cavity 3 simultaneously, observe the state between the clearance ball 2, separate until between all clearance balls 2, avoid taking place the mutual card between inner wall and the clearance ball 2 and die.
The method for observing the state of the cleaning ball 2 is not limited to the insertion of the internal observation mirror, and other prior arts can be applied as well, and is not limited herein.
Further, to above-mentioned step S3, when all clearance balls 2 were in the free activity state, rotary device will drive work piece body 1 reciprocating rotation to make the step of clearance ball 2 friction annular cavity 3, can specifically be: the rotation strength of the workpiece body 1 is controlled to meet the requirement that the cleaning ball 2 can move in the whole annular cavity 3 and does not fall out of the annular cavity 3. It should be noted that the reciprocating rotation of the workpiece body 1 should ensure that the friction range of the cleaning ball 2 relates to all difficult-to-clean sections of the annular cavity 3, and at the same time, avoid the cleaning ball 2 with too large kinetic energy from flying out of the annular cavity 3; this technique can be realized by controlling the rotation speed and the rotation mode of the rotating device.
The application also provides a welding part, which is applicable to the annular channel inner wall cleaning method, and comprises the following steps: the cleaning device comprises a workpiece body 1, a rotating device, a plurality of cleaning balls 2 and a high-pressure water gun;
a notch is formed in the surface of the workpiece body 1, an annular cavity 3 is formed in the workpiece body, and openings at two ends of the annular cavity 3 are respectively formed in two sections of the notch; clearance ball 2 sets up in toroidal cavity 3, and rotary device is used for driving workpiece body 1 and rotates, and the high-pressure squirt is used for spraying water towards toroidal cavity 3 insides. In an embodiment of the present application, the workpiece body 1 is formed by butt welding an upper body and a lower body, and a semi-annular channel is reserved in each of the upper body and the lower body until an annular cavity 2 is formed after welding, and two ports are formed.
The notch of the workpiece body 1 is arranged in practical use without excessive limitation, and only the openings at two ends of the annular cavity 3 are reserved, so that the notch can be changed according to practical requirements; meanwhile, the number of the cleaning balls 2 can be changed according to actual requirements. The use of high-pressure squirt can wash annular cavity 3 inside after stopping rotating, also can wash away when work piece body 1 is rotatory, specifically can pass through the hose connection with high-pressure squirt and input the water under high pressure to fix it at one of them port of annular cavity 3, ensure that the work of washing away can not influenced by the rotation of work piece body 1.
Further, the diameter of the cleaning ball 2 is smaller than the radius of the annular cavity 3, the inner diameter of the annular cavity 3 is not necessarily completely consistent, but according to the actual use requirement, the diameter of the cleaning ball 2 is planned to be smaller than the minimum radius of the annular cavity 3, the mobility of the cleaning ball 2 in the annular cavity 3 is ensured, and meanwhile, the risk that the cleaning balls 2 are mutually stuck in the annular cavity 3 is reduced. Simultaneously, the cleaning ball 2 which is small enough can rub the inner wall of the annular cavity 3 more carefully, and the quality of the cleaning ball 2 only needs to be ensured to meet the requirement of realizing slag removal.
Further, above-mentioned clearance ball 2 sets up to the iron sand, and the iron sand is with low costs, quality meet the requirements and can not produce bad chemical reaction to the welding member inside at the slagging-off in-process. Of course, other solids meeting the above requirements may be used as the cleaning ball 2, and are not expanded herein.
Further, referring to fig. 3 of the specification, fig. 3 is a schematic structural diagram of a rotating apparatus provided in an embodiment of the present application, where the rotating apparatus includes: a rotating shaft and a holder 4 mounted on the rotating shaft; the clamping piece 4 is used for fixedly clamping the workpiece body 1, in one embodiment of the application, the rotating shaft is used for driving the rotating disc 5 to rotate, and the rotating disc 5 drives the clamping piece 4 to rotate; the motor 6 drives the rotating disc 5 to rotate.
The clamping and fixing mode of the clamping piece 4 and the workpiece body 1 can be changed according to actual requirements, and the rotating shaft can adopt an electric control mode, so that the accuracy of the rotating angle and the speed of the rotating shaft is ensured.
It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The welding part and the cleaning method for the inner wall of the annular channel provided by the application are described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, without departing from the principle of the present application, the present application can also make several improvements and modifications, and those improvements and modifications also fall into the protection scope of the claims of the present application.
Claims (7)
1. A cleaning method for the inner wall of an annular channel is applied to an annular cavity of a welding part, and the welding part comprises the following steps: the cleaning device comprises a workpiece body, a rotating device, a plurality of cleaning balls and a high-pressure water gun; the surface of the workpiece body is provided with a notch, the inside of the workpiece body is provided with the annular cavity, and openings at two ends of the annular cavity are respectively arranged on two sections of the notch; the cleaning ball is arranged in the annular cavity, the rotating device is used for driving the workpiece body to rotate, and the high-pressure water gun is used for spraying water towards the inside of the annular cavity, and the cleaning method is characterized by comprising the following steps of:
after the workpiece body is fixed on the rotating device, the direction of a port of the annular cavity is adjusted to prevent the cleaning ball from leaking out;
checking the state of the cleaning balls to avoid the mutual jamming of the cleaning balls;
when all the cleaning balls are in a free moving state, the rotating device drives the workpiece body to rotate in a reciprocating manner, so that the cleaning balls rub the annular cavity;
and when the workpiece body stops rotating, the high-pressure water gun flushes water towards the inside of the annular cavity so as to clean slag in the annular cavity.
2. The method as claimed in claim 1, wherein the checking of the state of the cleaning balls to avoid the cleaning balls from being stuck to each other comprises: and repeatedly inclining the workpiece body until the cleaning balls are separated.
3. The method for cleaning the inner wall of the annular channel as claimed in claim 2, wherein when all the cleaning balls are in a free state, the step of rotating the workpiece body by the rotating device to rotate back and forth so that the cleaning balls rub against the annular cavity comprises the following steps: and controlling the rotation strength of the workpiece body to ensure that the cleaning ball can move in the whole annular cavity without departing from the annular cavity.
4. A weldment adapted for use in the method of cleaning the inner wall of an annular channel according to any of claims 1 to 3, comprising: the cleaning device comprises a workpiece body, a rotating device, a plurality of cleaning balls and a high-pressure water gun;
the surface of the workpiece body is provided with a notch, the inside of the workpiece body is provided with the annular cavity, and openings at two ends of the annular cavity are respectively arranged on two sections of the notch; the cleaning ball is arranged in the annular cavity, the rotating device is used for driving the workpiece body to rotate, and the high-pressure water gun is used for spraying water towards the inside of the annular cavity.
5. The weldment of claim 4, wherein the cleaning balls have a diameter that is less than the radius of the annular cavity.
6. The weldment of claim 4, wherein the cleaning balls are provided as iron sand.
7. The weldment of claim 4, wherein the rotation means comprises: a rotating shaft and a clamping piece mounted on the rotating shaft; the clamping piece is used for fixedly clamping the workpiece body, and the rotating shaft is used for driving the rotating shaft to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310012099.6A CN115971171A (en) | 2023-01-05 | 2023-01-05 | Welding part and annular channel inner wall cleaning method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310012099.6A CN115971171A (en) | 2023-01-05 | 2023-01-05 | Welding part and annular channel inner wall cleaning method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115971171A true CN115971171A (en) | 2023-04-18 |
Family
ID=85967874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310012099.6A Pending CN115971171A (en) | 2023-01-05 | 2023-01-05 | Welding part and annular channel inner wall cleaning method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115971171A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6418484A (en) * | 1987-07-10 | 1989-01-23 | Takuo Mochizuki | Method of washing inside of duct |
| CN1320487A (en) * | 2000-04-21 | 2001-11-07 | 王筱均 | High-pressure gas method for descaling pipeline and protecting pipeline wall |
| US20140174484A1 (en) * | 2011-05-18 | 2014-06-26 | Basf Se | Device and Method for Draining and Rinsing Containers Filled with Fluid |
| US20150090293A1 (en) * | 2013-09-30 | 2015-04-02 | Lonny Shawn Lewis | Methods and systems for use in washing bulk containers |
| CN114453348A (en) * | 2022-02-17 | 2022-05-10 | 江阴友联金属制品有限公司 | I-shaped wheel sand removal device and sand removal method |
| KR102406859B1 (en) * | 2021-08-06 | 2022-06-10 | 유한회사 태양건설 | Pipe Line Cleaning System Using High Pressure Press-Fitting and Vacuum Suction of Washing Water |
-
2023
- 2023-01-05 CN CN202310012099.6A patent/CN115971171A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6418484A (en) * | 1987-07-10 | 1989-01-23 | Takuo Mochizuki | Method of washing inside of duct |
| CN1320487A (en) * | 2000-04-21 | 2001-11-07 | 王筱均 | High-pressure gas method for descaling pipeline and protecting pipeline wall |
| US20140174484A1 (en) * | 2011-05-18 | 2014-06-26 | Basf Se | Device and Method for Draining and Rinsing Containers Filled with Fluid |
| US20150090293A1 (en) * | 2013-09-30 | 2015-04-02 | Lonny Shawn Lewis | Methods and systems for use in washing bulk containers |
| KR102406859B1 (en) * | 2021-08-06 | 2022-06-10 | 유한회사 태양건설 | Pipe Line Cleaning System Using High Pressure Press-Fitting and Vacuum Suction of Washing Water |
| CN114453348A (en) * | 2022-02-17 | 2022-05-10 | 江阴友联金属制品有限公司 | I-shaped wheel sand removal device and sand removal method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10175010B2 (en) | Heat exchanger cleaning system with cable and turbine rotation | |
| CN106239332B (en) | A kind of oil pipeline inwall processing intelligence cleaning rust removalling equipment | |
| CN109483568B (en) | Automatic flaw detection, carbon planing and welding robot for outer wall of pipeline | |
| CN109488836B (en) | Automatic flaw detection, carbon planing and welding robot for inner wall of pipeline | |
| CN109126230B (en) | Integrated rotary type sewage in-situ regeneration device | |
| US6889889B2 (en) | Fusion-welding of defective components to preclude expulsion of contaminants through the weld | |
| CN104440491A (en) | Derusting machine for inner wall of steel pipeline | |
| CN115971171A (en) | Welding part and annular channel inner wall cleaning method thereof | |
| CN207509039U (en) | A kind of derusting device | |
| CN210514264U (en) | Pipeline flaw detection device | |
| CN109759663A (en) | A kind of stainless steel/aluminium alloy heterogenous metal brazing attachment method | |
| CN109676531B (en) | Narrow-deep groove brazing attachment method for stainless steel pipe fitting and aluminum alloy workpiece | |
| CN112439749A (en) | Pipe inner wall cleaning system and cleaning method | |
| CN110202317B (en) | Remanufacturing process of automobile aluminum alloy hub | |
| CN109333363B (en) | Flexible grinding head cleaning tool and method for burrs of deep holes and intersected holes | |
| CN212069789U (en) | Efficient flushing rust removal equipment for steel corrosion castings | |
| KR20190027597A (en) | Automatic equipment for rehabilitation of old steel pipes | |
| CN210187523U (en) | Pipeline inner wall circumferential weld joint coating equipment | |
| CN118371485B (en) | Regeneration rust removal purification treatment equipment for waste metal parts | |
| JP2005138250A (en) | Finishing method and finishing device for joint bolt | |
| CN118385219A (en) | Small-caliber pipeline obstacle and sediment defect repairing device and method | |
| CN219702887U (en) | Salt bath cleaning device for removing iron scales on inner wall of large-aperture steel pipe | |
| CN117733398A (en) | Structure for preventing narrow-gap impurity residue and implementation method | |
| CN216098174U (en) | Heat exchange tube rust cleaning equipment | |
| CN113369730B (en) | Automatic welding process for heat exchanger tube plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |