CN113523477B - Environment-friendly crest welder - Google Patents
Environment-friendly crest welder Download PDFInfo
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- CN113523477B CN113523477B CN202111083319.1A CN202111083319A CN113523477B CN 113523477 B CN113523477 B CN 113523477B CN 202111083319 A CN202111083319 A CN 202111083319A CN 113523477 B CN113523477 B CN 113523477B
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- hole
- connecting pipe
- collecting bin
- synchronous chain
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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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/08—Soldering by means of dipping in molten solder
- B23K1/085—Wave soldering
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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
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Abstract
The invention discloses an environment-friendly wave crest welder which comprises a transmission piece, a welding piece and a welding piece, wherein the transmission piece comprises a conveyor belt and a synchronous chain, and a linear conveying section of the synchronous chain is collinear with the conveyor belt; the gas collecting bin is fixed above the single synchronous chain or in the enclosed middle area, the shape of the gas collecting bin is consistent with that of the synchronous chain, a relay box is fixed on the synchronous chain, the gas collecting bin is communicated with the relay box through a connecting pipe fitting, and a gas chamber is arranged in the gas collecting bin and communicated with an exhaust fan through a pipeline; the gas collection storehouse of fixed placing can be sustainable with the relay box intercommunication that removes and produce the negative pressure, through set up the flue gas that relay box and air circuit pipe produced to the welding on synchronous chain closely collect, improve flue gas treatment effeciency, and the air circuit pipe only just works above the weld pool, reduces the energy consumption.
Description
Technical Field
The invention relates to the technical field of wave soldering, in particular to an environment-friendly wave soldering machine.
Background
In the electronic industry, various soldering processes are widely used, and in particular, advanced processes such as wave soldering, reflow soldering and the like are widely used in the surface assembly production process of printed circuit boards in order to meet the soldering requirements of large-scale electronic devices and integrated circuits.
However, the existing smokeless wave-soldering machine has poor purification effect on smoke, so that the invention of the smoke treatment device for wave soldering is very necessary for realizing the environment protection of wave soldering.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments, and in this section as well as in the abstract and the title of the invention of this application some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made keeping in mind the above problems occurring in the prior art and/or the problems occurring in the prior art.
Therefore, the technical problem to be solved by the invention is that the existing crest welder has poor purification effect on the smoke.
In order to solve the technical problems, the invention provides the following technical scheme: an environment-friendly wave crest welder comprises a wave crest welder body,
a transport member comprising a conveyor belt and a timing chain, a linear transport section of the timing chain being collinear with the conveyor belt;
the gas collecting bin is fixed above the single synchronous chain or in the enclosed middle area, the shape of the gas collecting bin is consistent with that of the synchronous chain, the synchronous chain is fixedly provided with the relay box, the gas collecting bin is communicated with the relay box through a connecting pipe fitting, an air chamber is arranged in the gas collecting bin, and the air chamber is communicated with the exhaust fan through a pipeline.
As a preferable scheme of the environment-friendly wave crest soldering machine, the invention comprises the following steps: the outer wall of the gas collection bin is provided with a ring hole, and the ring hole penetrates through the ring groove and is communicated with the gas chamber and the outer side; the connecting pipe fitting is arranged in the annular hole.
As a preferable scheme of the environment-friendly wave crest soldering machine, the invention comprises the following steps: the annular ring is provided with an annular groove, and the annular groove divides the annular ring into a first hole and a second hole.
As a preferable scheme of the environment-friendly wave crest soldering machine, the invention comprises the following steps: the annular groove is internally provided with a round ball which is embedded in a filling piece, and the filling piece is used for isolating the first hole and the second hole.
As a preferable scheme of the environment-friendly wave crest soldering machine, the invention comprises the following steps: the ball is provided with a ball hole, and the connecting pipe fitting penetrates through the ball hole.
As a preferable scheme of the environment-friendly wave crest soldering machine, the invention comprises the following steps: the filling member is an aerogel block.
As a preferable scheme of the environment-friendly wave crest soldering machine, the invention comprises the following steps: and a connecting pipe is arranged on the side surface or the top of the relay box and is connected with the connecting pipe fitting.
As a preferable scheme of the environment-friendly wave crest soldering machine, the invention comprises the following steps: the air collecting bin is also provided with an air exhaust opening, and the air extractor is connected with the air exhaust opening through an air exhaust pipe.
As a preferable scheme of the environment-friendly wave crest soldering machine, the invention comprises the following steps: and lubricating oil is arranged between the ball hole and the outer wall of the connecting pipe fitting, and the lubricating oil is sealed between the ball hole and the outer wall of the connecting pipe fitting by a filling piece.
As a preferable scheme of the environment-friendly wave crest soldering machine, the invention comprises the following steps: and a sealing ring is arranged at the joint of the exhaust pipe and the exhaust opening.
The invention has the beneficial effects that: the gas collection storehouse of fixed placing can be sustainable with the relay box intercommunication that removes and produce the negative pressure, through set up the flue gas that relay box and air circuit pipe produced to the welding on synchronous chain closely collect, improve flue gas treatment effeciency, and the air circuit pipe only just works above the weld pool, reduces the energy consumption.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:
FIG. 1 is a schematic view of an overall structure of an environment-friendly wave soldering machine according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a connection between an air exhaust member and a gas collecting bin in the environment-friendly wave soldering machine according to an embodiment of the present invention;
FIG. 3 is a schematic view of a cross-sectional structure of a connection between a ball and a connecting pipe in an environment-friendly wave soldering machine according to an embodiment of the present invention;
FIG. 4 is a schematic view of a connection structure between an air exhaust member and a gas collection bin bottom of an environment-friendly crest welder according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view illustrating a working state of an air-extracting component in an environment-friendly wave soldering machine according to an embodiment of the present invention;
FIG. 6 is a schematic structural view of a switch and a gas line pipe in an environment-friendly wave crest welder according to an embodiment of the present invention;
FIG. 7 is a schematic cross-sectional view of a relay box in an environment-friendly wave soldering machine according to an embodiment of the present invention;
wherein: the conveying member 100, the conveyor belt 104, the synchronous chain 101, the linear conveying section 101a, the air collecting bin 200, the middle area 101b, the relay box 301, the connecting pipe 201, the air chamber 202, the annular hole 206, the annular groove 203, the first hole 206a, the second hole 206b, the first round ball 204, the filling member 205, the ball hole 204a, the connecting pipe 301k, the air pumping port 207, the air pump 208, the air pumping pipe 209, the air pumping member 300, the air path pipe 302, the sealing member 303, the hook 102, the butt joint hose 301a, the cavity 301d, the protruding shaft 301b, the tubular shaft 301c, the ball groove 301e, the insertion groove 301f, the transition groove hole 301g, the through hole 301j, the switching member 304, the second round ball 304a, the round pipe 304b, the radial groove 304a-1, the axial groove 304b-1, the through groove 302a, the air hole 302b, the spiral strip 302c, the spiral groove 304b-2, the insert block 302d, the guide groove 301h, the sealing ring 303a, the nut 303b, flap 102 b.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Example 1
Referring to fig. 1 to 4, the embodiment provides an environment-friendly wave-soldering machine, which includes a transmission member 100, wherein the transmission member 100 includes a conveyor belt 104, a synchronous chain 101 and hooks 102, a linear transportation section 101a of the synchronous chain 101 is collinear with the conveyor belt 104, the hooks 102 are distributed on the synchronous chain 101, and a main board 103 is arranged on the conveyor belt 104; the gas collecting bin 200 is fixed above the single synchronous chain 101 or in the enclosed middle area 101b, the shape of the gas collecting bin 200 is consistent with that of the synchronous chain 101, the relay box 301 is fixed on the synchronous chain 101, the gas collecting bin 200 is communicated with the relay box 301 through the connecting pipe 201, the gas chamber 202 is arranged in the gas collecting bin 200, and the gas chamber 202 is communicated with the exhaust fan through a pipeline.
The outer wall of the gas collecting bin 200 is provided with an annular hole 206, and the annular hole 206 penetrates through the annular groove 203 and is communicated with the gas chamber 202 and the outer side; the connecting tube 201 is disposed in the annular ring 206.
It should be noted that the ring hole 206 and the ring groove 203 may be disposed at the bottom of the gas collecting bin 200, in this case, the gas collecting bin 200 is disposed above the synchronization chain 101.
The annular ring 206 is provided with a ring groove 203, and the ring groove 203 divides the annular ring 206 into a first hole 206a and a second hole 206 b; the annular groove 203 is provided with a first ball 204, the first ball 204 is embedded in a filler 205, and the filler 205 isolates the first hole 206a from the second hole 206 b.
The first round ball 204 is provided with a ball hole 204a, and the connecting pipe 201 is arranged in the ball hole 204a in a penetrating way; the filler piece 205 is an aerogel block.
The aerogel block has certain toughness, and it spreads all over in annular groove 203, and the compact setting isolates first hole 206a and second hole 206b, and after connecting pipe 201 moved, the aerogel block moved in annular groove 203, and the aerogel block has certain toughness, adaptable annular groove 203 shape under the extrusion, and preferred, the cross-sectional shape is unanimous everywhere in annular groove 203, or is close.
During the movement of the connecting tube 201 following the timing chain 101, the connecting tube 201 will move along the ring hole 206, and the first round ball 204 will move the filling member 205 in the ring groove 203.
The junction box 301 is provided with a connecting pipe 301k at a side or a top thereof, and the connecting pipe 301k is connected to the connecting pipe 201.
This structure can make the position of the relay box 301 relative to the gas collecting bin 200 change during the movement of the relay box 301 following the synchronous chain 101, but the cavity in the relay box 301 and the gas chamber in the gas collecting bin 200 still keep communicating.
Therefore, when the air pump connected to the air chamber 202 operates, negative pressure can be generated in the air chamber 202 and the cavity in the relay box 301.
The gas collecting bin 200 is also provided with a pumping hole 207, and the air pump 208 is connected with the pumping hole 207 through a pumping pipe 209; lubricating oil is arranged between the ball hole 204a and the outer wall of the connecting pipe fitting 201, and the lubricating oil is sealed between the ball hole 204a and the outer wall of the connecting pipe fitting 201 by a filling piece 205; a sealing ring is arranged at the joint of the air exhaust pipe 209 and the air exhaust port 207.
Example 2
Referring to fig. 1 to 5, the present embodiment is different from the previous embodiment in that the present embodiment further includes an air extracting member 300, the air extracting member 300 includes a relay box 301, an air path pipe 302 and a sealing member 303, the relay box 301 is disposed on the synchronous chain 101 at a position corresponding to the position of the hook 102, and the air path pipe 302 is fixed to the relay box 301 through the sealing member 303.
In the present embodiment, the air exhausting members 300 are distributed along the synchronization chain 101, and it should be noted that two synchronization chains 101 are symmetrically arranged, and the hooks 102 are arranged on the air exhausting members 300 to move along the synchronization chains 101. Specifically, the opposing gas circuit tubes 302 contact and trigger the beginning of the pump down when moving over the weld pool.
a protruding shaft 301b is arranged at the end of the relay box 301, a pipe shaft 301c is arranged in the relay box 301, and the pipe shaft 301c and the protruding shaft 301b are arranged coaxially.
Specifically, the relay boxes 301 are communicated through the docking hoses 301a, so that negative pressure is generated in the cavity 301d, and when the cavity 301d is communicated with the air path pipe 302, the air path pipe 302 starts to perform air suction to suck out the smoke generated by welding.
It should be noted that the other end of the exhaust fan is connected with a flue gas treatment device to intensively treat the absorbed flue gas.
Example 3
Referring to fig. 1 to 7, the present embodiment is different from the previous embodiment in that a ball groove 301e is disposed in a tubular shaft 301c, a plug groove 301f is disposed inward of a protruding shaft 301b, the ball groove 301e is communicated with the plug groove 301f through a transition groove hole 301g, a through hole 301j is disposed in the tubular shaft 301c, and the through hole 301j communicates the cavity 301d with the ball groove 301 e.
Preferably, the protruding shaft 301b, the inserting groove 301f and the transition groove hole 301g are cylindrical grooves and coaxial with each other. It should be noted that the spherical center of the ball groove 301e is located on the axis of the protruding shaft 301 b.
The relay box 301 is provided with a switching piece 304, the switching piece 304 comprises a second round ball 304a and a round tube 304b, and the second round ball 304a is arranged at the end of the round tube 304 b; the second ball 304a is disposed in the ball slot 301e, and the circular tube 304b is disposed in the insertion slot 301f through the end of the transition slot hole 301 g.
The second round ball 304a is provided with a radial groove 304a-1, the round tube 304b is provided with an axial groove 304b-1, and the radial groove 304a-1 and the axial groove 304b-1 are vertically arranged and communicated.
It should be noted that the center of the second round ball 304a is located on the axis of the circular tube 304b, the switching member 304 can rotate around the axis of the circular tube 304b in the tubular shaft 301c, and during the rotation, if the through hole 301j coincides with the radial groove 304a-1, the cavity 301d is communicated with the insertion groove 301f, and if the through hole 301j does not coincide with the radial groove 304a-1 completely, the cavity 301d is not communicated with the insertion groove 301 f.
Further, one end of the air passage pipe 302 is provided with a through groove 302a along the axial direction, and the air passage pipe 302 is provided with an air hole 302b along the radial direction, and the air hole 302b is communicated with the through groove 302 a.
A spiral strip 302c is arranged at the opening of the through groove 302a, and a spiral groove 304b-2 is arranged at the outer side of the end part of the circular pipe 304 b; the end of the air passage pipe 302 is provided with an insert block 302d, a guide groove 301h is arranged in the insertion groove 301f along the radial direction, and the insert block 302d is embedded in the guide groove 301 h.
It should be noted that the insert 302d is disposed at one open end of the through slot 302 a.
The sealing element 303 comprises a sealing ring 303a and a nut 303b, the outer side of the protruding shaft 301b is provided with an external thread, and the sealing ring 303a is arranged at the end part of the protruding shaft 301 b;
the nut 303b is sleeved on the air passage pipe 302 and is screwed with the protruding shaft 301 b.
The gas circuit pipe 302 is detachably connected with the relay box 301, and specifically, the assembly process is to insert the inserted block 302d into the guide groove 301h correspondingly, the end of the gas circuit pipe 302 contacts the end of the circular pipe 304b in the insertion process, the insertion is stopped, the sealing ring 303a and the nut 303b are sequentially sleeved on the gas circuit pipe 302 and are connected with the external thread on the convex shaft 301b in a screwing manner.
Since the insert 302d is sealed in the guide groove 301h by the seal ring 303a, the air passage pipe 302 can move only linearly along the guide groove 301h and cannot rotate.
In this process, preferably, the distance from the end of the circular tube 304b to the end of the protruding shaft 301b is the same as the thickness of the insert 302d, so that when the end of the circular tube 304b contacts the end of the air path tube 302, one side of the insert 302d contacts the sealing ring 303a, thereby preventing the air path tube 302 from shaking.
It should be noted that, at this time, the end of the spiral strip 302c corresponds to the end of the spiral groove 304b-2, and further, the insertion groove 301f is further provided with a spring and a circular tube 304b, and the spring is connected along the radial direction of the circular tube 304b, so that the circular tube 304b cannot rotate randomly, and it is ensured that the end of the spiral groove 304b-2 on the circular tube 304b in the initial state corresponds to the end of the spiral strip 302 c; the spring is torsionally stretched as the tube 304b rotates.
It should be noted that, in this initial state, the through hole 301j is completely misaligned with the radial groove 304a-1, that is, the cavity 301d is not communicated with the through groove 302a in the air passage pipe 302.
When the air passage pipe 302 is pressed towards the circular pipe 304b, the spiral strip 302c starts to be screwed into the spiral groove 304b-2, and the air passage pipe 302 cannot rotate, the switching piece 304 rotates, so that the through hole 301j and the radial groove 304a-1 are completely overlapped, at the moment, the cavity 301d is communicated with the through groove 302a in the air passage pipe 302, and the smoke is sucked from the air hole 302b for centralized treatment due to the negative pressure in the cavity 301 d.
Further, the timing chain 101 drives the hook 102 to rotate and support and transport the main plate 103, which is conveyed to the upper side of the weld pool, in pairs, passing through the weld pool.
That is, only the straight line segment above the weld pool is located on the synchronous chain 101 in the working state, when the air passage pipe 302 rotates along with the synchronous chain 101, in the process of closing from two sides to the middle, the symmetrically arranged air passage pipes 302 start to contact and extrude each other, the air passage pipes 302 are extruded to the circular pipe 304b, and the switching piece 304 is driven to rotate, so that the air passage pipes 302 located on the straight line segment above the weld pool work.
This configuration provides the benefit of fewer simultaneous working airway tubes 302, fewer unnecessary passages, and increased negative pressure in the chamber when in operation.
Specifically, when the gas path pipe 302 is not connected, the cavity 301d and the insertion groove 301f are still not communicated, so that the overall work is not affected under the condition that a single gas path pipe 302 is broken.
The hook 102 is provided with a perforation and a folded plate 102b, the folded plate 102b is arranged at the top of the relay box 301, the perforation is sleeved on the convex shaft 301b, and the sealing element 303 also plays a role in fixing the hook 102.
Claims (5)
1. The utility model provides an environment-friendly crest welder which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
-a transport element (100), said transport element (100) comprising a conveyor belt (104) and a synchronization chain (101), a rectilinear transport section (101 a) of said synchronization chain (101) being collinear with said conveyor belt (104);
the gas collecting bin (200) is fixed above the synchronous chain (101) or in a surrounded middle area (101 b), the shape of the gas collecting bin (200) is consistent with that of the synchronous chain (101), a relay box (301) is fixed on the synchronous chain (101), the gas collecting bin (200) is communicated with the relay box (301) through a connecting pipe fitting (201), a gas chamber (202) is arranged in the gas collecting bin (200), and the gas chamber (202) is communicated with an exhaust fan through a pipeline;
the outer wall of the gas collecting bin (200) is provided with an annular hole (206), and the annular hole (206) penetrates through the annular groove (203) to communicate the gas chamber (202) with the outer side; the connecting pipe (201) is arranged in the annular hole (206);
an annular groove (203) is arranged in the annular hole (206), and the annular groove (203) divides the annular hole (206) into a first hole (206 a) and a second hole (206 b);
a first round ball (204) is arranged in the annular groove (203), the first round ball (204) is embedded in a filling piece (205), and the filling piece (205) isolates the first hole (206 a) and the second hole (206 b);
a ball hole (204 a) is formed in the first round ball (204), and the connecting pipe fitting (201) penetrates through the ball hole (204 a);
the filler (205) is an aerogel block;
in the process that the connecting pipe fitting (201) moves along the synchronous chain (101), the connecting pipe fitting (201) moves in the annular hole (206), and the first round ball (204) drives the filling piece (205) to move in the annular groove (203).
2. The environment-friendly wave soldering machine according to claim 1, wherein: the side face or the top of the relay box (301) is provided with a connecting pipe (301 k), and the connecting pipe (301 k) is connected with the connecting pipe fitting (201).
3. The environment-friendly wave soldering machine according to claim 2, wherein: the air collecting bin (200) is further provided with an air pumping hole (207), and the air pump (208) is connected with the air pumping hole (207) through an air pumping pipe (209).
4. The environment-friendly wave soldering machine according to claim 3, wherein: lubricating oil is arranged between the ball hole (204 a) and the outer wall of the connecting pipe fitting (201), and the lubricating oil is sealed between the ball hole (204 a) and the outer wall of the connecting pipe fitting (201) by a filling piece (205).
5. The environment-friendly wave soldering machine according to claim 4, wherein: and a sealing ring is arranged at the joint of the air exhaust pipe (209) and the air exhaust port (207).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111083319.1A CN113523477B (en) | 2021-09-16 | 2021-09-16 | Environment-friendly crest welder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111083319.1A CN113523477B (en) | 2021-09-16 | 2021-09-16 | Environment-friendly crest welder |
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| Publication Number | Publication Date |
|---|---|
| CN113523477A CN113523477A (en) | 2021-10-22 |
| CN113523477B true CN113523477B (en) | 2021-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111083319.1A Active CN113523477B (en) | 2021-09-16 | 2021-09-16 | Environment-friendly crest welder |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201709039U (en) * | 2010-06-10 | 2011-01-12 | 深圳创维－Rgb电子有限公司 | Automatic crest welder |
| CN104551310A (en) * | 2013-10-27 | 2015-04-29 | 西安中科麦特电子技术设备有限公司 | Chain transmission mechanism of crest welder |
| CN104999150A (en) * | 2015-07-15 | 2015-10-28 | 深圳市创荣发电子有限公司 | Energy saving device and method for wave soldering machine |
| CN207997053U (en) * | 2018-03-03 | 2018-10-23 | 无锡诚赢科技有限公司 | A kind of automatic wave soldering feeding guide |
| CN111215799A (en) * | 2020-01-18 | 2020-06-02 | 山东海瑞林装饰工程有限公司 | Energy-saving steel structure welding equipment |
| CN111515024A (en) * | 2020-04-27 | 2020-08-11 | 江苏科技大学 | Portable welding fume collecting and processing device |
| CN113172293A (en) * | 2021-04-28 | 2021-07-27 | 广东万新达电子科技有限公司 | Automatic welding and conveying equipment for circuit board |
| CN113245661A (en) * | 2021-07-07 | 2021-08-13 | 江苏长实基业电气科技有限公司 | Crest welder flue gas treatment device |
-
2021
- 2021-09-16 CN CN202111083319.1A patent/CN113523477B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201709039U (en) * | 2010-06-10 | 2011-01-12 | 深圳创维－Rgb电子有限公司 | Automatic crest welder |
| CN104551310A (en) * | 2013-10-27 | 2015-04-29 | 西安中科麦特电子技术设备有限公司 | Chain transmission mechanism of crest welder |
| CN104999150A (en) * | 2015-07-15 | 2015-10-28 | 深圳市创荣发电子有限公司 | Energy saving device and method for wave soldering machine |
| CN207997053U (en) * | 2018-03-03 | 2018-10-23 | 无锡诚赢科技有限公司 | A kind of automatic wave soldering feeding guide |
| CN111215799A (en) * | 2020-01-18 | 2020-06-02 | 山东海瑞林装饰工程有限公司 | Energy-saving steel structure welding equipment |
| CN111515024A (en) * | 2020-04-27 | 2020-08-11 | 江苏科技大学 | Portable welding fume collecting and processing device |
| CN113172293A (en) * | 2021-04-28 | 2021-07-27 | 广东万新达电子科技有限公司 | Automatic welding and conveying equipment for circuit board |
| CN113245661A (en) * | 2021-07-07 | 2021-08-13 | 江苏长实基业电气科技有限公司 | Crest welder flue gas treatment device |
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| CN113523477A (en) | 2021-10-22 |
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