CN115870586A - Welding method for air pipe and liquid storage tank body and compressor - Google Patents
Welding method for air pipe and liquid storage tank body and compressor Download PDFInfo
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- CN115870586A CN115870586A CN202211509255.1A CN202211509255A CN115870586A CN 115870586 A CN115870586 A CN 115870586A CN 202211509255 A CN202211509255 A CN 202211509255A CN 115870586 A CN115870586 A CN 115870586A
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Abstract
The invention relates to the technical field of liquid accumulators, in particular to a welding method of an air pipe and a liquid accumulator tank body and a compressor. The welding method of the air pipe and the liquid storage tank body comprises the following steps: s1, ultrasonically cleaning an air pipe to be welded and a liquid storage tank body to be welded, removing surface oil stains, rusting and other defects, and drying; s2, assembling and combining the air pipe and the liquid storage tank body, mounting the air pipe and the liquid storage tank body on a clamping tool of a brazing machine, and S3, filling solder in a gap between the air pipe and the liquid storage tank body; s4, adjusting a flame welding gun on the brazing machine to a proper position, and enabling the emitted flame to be aligned with the joint of the air pipe and the liquid storage tank body to melt the welding flux; s5, waiting for the solder to be cooled and solidified so as to fixedly connect the air pipe with the liquid storage tank body to form an assembly; s6, taking out the assembly, and irradiating and separating the assembly by high-frequency pulse laser emitted by the laser emitting device to remove the oxide film on the outer surface of the assembly so as to clean foreign matters on the surface of the assembly. A compressor comprises the assembly processed by the method.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to a method for welding an air pipe and a liquid storage tank body and a compressor.
Background
The compressor is a driven fluid machine for lifting low-pressure gas into high-pressure gas, and is a heart of a refrigeration system, and the liquid accumulator is an important component of the compressor. The air inlet and outlet pipes of the traditional liquid storage device are made of red copper, the welding process between the air inlet and outlet pipes and the cylinder body mainly adopts flame welding, furnace brazing and high-frequency welding, and the welding materials are silver solder, brass solder and phosphor bronze solder respectively. The air pipe in the liquid storage device is connected with the liquid storage device body through welding. Because the trachea part that is located the internal portion of liquid storage tank does not contact with the outside air, therefore be difficult for rustting, this part adopts the copper pipe not to have what advantage than adopting the steel pipe, and copper just exceeds several times than just under the same volume price, therefore selects and select the copper pipe in essence obviously manufacturing cost higher, for reducing product material cost, the trachea material in the current reservoir changes to steel material more.
Because flame brazing between the steel parts often causes surface oxidation of welding parts of two welding metal parts, the surfaces of the welding parts can be blackened after oxidation, when paint is sprayed after welding, a thick oxide film is used for blocking between a surface paint film and a steel pipe, so that the paint film loses the binding force with the steel pipe, and the antirust effect of the paint film is seriously influenced, the scale is removed after welding by subsequent cleaning, polishing and other procedures, the welding cost is greatly increased, a large amount of chemical agents are required to be used in the cleaning process, and the environment can be seriously polluted.
Therefore, it is necessary to provide a technical solution to solve the above problems.
Disclosure of Invention
The invention provides a method for welding an air pipe and a liquid storage tank body and a compressor, and aims to solve the problem that in the prior art, the surface of a liquid storage tank steel pipe is cleaned by a chemical agent to remove oxides, so that environmental pollution is easily caused.
In order to achieve the purpose, the invention provides a method for welding an air pipe and a liquid storage tank body, which comprises the following steps:
s1, ultrasonically cleaning an air pipe to be welded and a liquid storage tank body to be welded, removing surface oil stains, rusting and other defects, and drying;
s2, assembling the air pipe and the liquid storage tank body, installing the assembled air pipe and the liquid storage tank body on a clamping tool of a brazing machine,
s3, filling solder in a gap between the air pipe and the liquid storage tank body;
s4, adjusting a flame welding gun on the brazing machine to a proper position, and enabling the ejected flame to be aligned with the joint of the air pipe and the liquid storage tank body to melt the welding flux;
s5, waiting for the solder to be cooled and solidified so as to fixedly connect the air pipe with the liquid storage tank body to form a combined piece;
s6, taking out the assembly, and irradiating and separating the assembly by high-frequency pulse laser emitted by the laser emitting device to remove the oxide film on the outer surface of the assembly so as to clean foreign matters on the surface of the assembly.
More specifically, step S6 specifically includes:
the worker holds the laser emitting device or the assembly by hand, and the high-frequency pulse laser emitted by the laser emitting device is manually changed to irradiate the position on the assembly, so that the oxidized and blackened part on the outer surface of the assembly is irradiated and separated by the high-frequency pulse laser.
More specifically, step S6 specifically includes:
fixing the assembly on a processing table, arranging a mechanical arm outside the processing table, and installing a laser emission device on the mechanical arm; the mechanical arm drives the high-frequency pulse laser emitted by the laser emitting device to irradiate, separate and remove the oxidized and blackened part on the outer surface of the assembly through programming.
More specifically, one end of the liquid storage tank body is provided with an annular flanging, and the middle part of the annular flanging is provided with a connecting hole; the air pipe penetrates through the connecting hole, and the annular flanging is in interference fit with the air pipe; the oxidation film is distributed on the outer surface of the annular flanging and the outer surface of the air pipe part exposed outside the liquid storage tank.
More specifically, when the annular flange is cleaned in step S6, the high-frequency pulse laser is injected along the radial direction of the annular flange and is wound around the annular flange for at least one circle.
More specifically, when the air pipe exposed outside the liquid storage tank body is cleaned in step S6, the high-frequency pulse laser moves back and forth along the axial direction of the air pipe.
More specifically, the output power of the laser emitting device in step S6 is 60W-65W.
More specifically, the focal length of the high-frequency pulse laser emitted by the laser emitting device in step S6 is 250mm to 255mm.
More specifically, the processing time of the high-frequency pulse laser emitted by the laser emitting device on the annular flanging is 8s-10s, and the processing time on the air pipe part exposed outside the liquid storage tank body is 10s-15s.
More specifically, step S4 further includes continuously supplying nitrogen gas into the liquid storage tank and the gas pipe through the nitrogen generator.
A compressor comprises a liquid storage device, wherein the liquid storage device comprises a combined piece processed by the welding method of the air pipe and the liquid storage tank body and cleaned by laser.
The invention relates to a welding method of an air pipe and a liquid storage tank body and a compressor, which have the technical effects that:
the oxide on the surface of the assembly is removed in a laser cleaning mode, specifically, the air pipe is welded with the liquid storage tank body through flame brazing, in the welding process, the liquid storage tank body and the air pipe are affected by high temperature to form an oxidation film on the surface, high-frequency pulse laser emitted by the laser emitting device irradiates the assembly and then enables the assembly and surface dirt to absorb energy to generate thermal expansion, and when the expansion force of the dirt is greater than the adsorption force of the dirt on the assembly, the dirt is separated from the surface of the assembly. Compare with the mode that adopts chemical to handle in the conventional art, adopt in this application can not cause the pollution of environment with laser treatment's mode, and can guarantee the clear high efficiency of foreign matter.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the embodiments of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.
In order to more clearly illustrate the technical solution of the present invention, the following preferred examples are provided below.
Example one
A welding method of an air pipe and a liquid storage tank body comprises the following steps:
s1, cleaning an air pipe to be welded and a liquid storage tank body to be welded, removing surface oil stains, rusting and other defects, and drying;
s2, assembling the air pipe and the liquid storage tank body, installing the assembled air pipe and the liquid storage tank body on a clamping tool of a brazing machine,
s3, filling solder in a gap between the air pipe and the liquid storage tank body;
s4, adjusting a flame welding gun on the brazing machine to a proper position, and enabling the emitted flame to be aligned with the joint of the air pipe and the liquid storage tank body to melt the welding flux;
s5, waiting for the solder to be cooled and solidified so as to fixedly connect the air pipe with the liquid storage tank body to form an assembly;
s6, taking out the assembly, and irradiating and separating the assembly by high-frequency pulse laser emitted by the laser emitting device to remove the oxide film on the outer surface of the assembly so as to clean foreign matters on the surface of the assembly.
The foreign matter on the surface of the assembly was black, and the energy spectrum analysis showed that the black deposit was mainly iron oxide, and the black deposit was removed by dipping absorbent cotton with concentrated acid salt heated to 50 ℃ and repeatedly wiping, and the black deposit was judged to be triiron tetroxide.
In this embodiment, ferroferric oxide on the surface of the assembly is removed by laser cleaning, specifically, the gas pipe and the liquid storage tank are welded by flame brazing, in the welding process, a ferroferric oxide film is formed on the surface of the liquid storage tank and the gas pipe under the influence of high temperature, the assembly and the ferroferric oxide on the surface can absorb energy to generate thermal expansion after the assembly is irradiated by high-frequency pulse laser emitted by a laser emitting device, and when the expansive force of the ferroferric oxide is greater than the adsorption force of dirt on the assembly, the ferroferric oxide is separated from the surface of the assembly. Compared with the mode of adopting chemical preparation to handle in the prior art, adopt in this application can not cause the pollution of environment with the mode of laser processing, and can guarantee the clear high efficiency of foreign matter.
It should be noted that conventional cleaning methods can come into contact with the assembly, which means that wear can be imparted to the surface of the assembly. The laser cleaning utilizes high-frequency high-energy laser pulses to irradiate the surface of the assembly, and the coating layer can instantly absorb focused laser energy to instantly evaporate or peel oil stains, rusty spots or coatings on the surface, so that attachments or surface coatings on the surface of the assembly are effectively removed at a high speed, and the metal base material cannot be damaged by the laser pulses with short action time under proper parameters.
Further, in this embodiment, in step S1, the air pipe to be welded and the liquid storage tank to be welded are cleaned by ultrasonic waves.
Further, in this embodiment, the step S4 further includes continuously inputting nitrogen gas into the liquid storage tank and the gas pipe through the nitrogen generator. By adopting the steps, oxygen in the liquid storage tank body and the air pipe is discharged outwards, and further the phenomenon that an oxidation film is formed on the inner wall of the liquid storage tank body or the air pipe due to the influence of high temperature is avoided.
Further, in this embodiment, one end of the liquid storage tank body is provided with an annular flange, and the middle of the annular flange is provided with a connecting hole; the air pipe penetrates through the connecting hole, and the annular flanging is in interference fit with the air pipe; the oxidation film is distributed on the outer surface of the annular flanging and the outer surface of the air pipe part exposed outside the liquid storage tank.
Further, in this embodiment, the step S6 specifically includes: the worker holds the laser emitting device or the assembly by hand, and the high-frequency pulse laser emitted by the laser emitting device is irradiated on the assembly by manually changing the position of the assembly, so that the high-frequency pulse laser is irradiated and separated to remove the oxide film on the outer surface of the assembly.
Further, in this embodiment, when the annular flange is cleaned in step S6, the high-frequency pulse laser is injected along the radial direction of the annular flange and is wound around the annular flange for at least one turn.
Preferably, when the annular flanging is cleaned, the assembly part can be arranged on a clamp of the rotary driving machine table, and the laser emitting device is fixed on the outer side of the clamp; therefore, the clamp is driven to rotate by the rotary driving mechanism, so that the high-frequency pulse laser emitted by the laser emitting device can automatically surround the annular flanging for one circle to several circles, and the automatic cleaning of the annular flanging is finished.
Further, in this embodiment, when the air pipe exposed outside the liquid storage tank is cleaned in step S6, the high-frequency pulse laser reciprocates along the axial direction of the air pipe. It should be noted that the air tube exposed outside the liquid storage tank is mostly of a bent tube structure, so that it is difficult to apply the above method for cleaning the annular flange to treat the oxide film on the surface of the air tube by rotating the assembly. The high-frequency pulse laser emitted by the laser emitting device irradiates the trachea to form a rectangular shape, the width and the area of the high-frequency pulse laser can be determined according to the model of the laser head used in practice, and the width and the area can be usually adjusted within the range of 100 x 100mm, so that the high-frequency pulse laser is controlled to reciprocate along the axial direction of the trachea, and the oxide film on the surface of the trachea can be removed most efficiently.
As a preferable scheme of this embodiment, the output power of the laser emitting device in step S6 is 60W-65W. It should be noted that when the output power of the laser emitting device is too high, the surfaces of the liquid storage tank body and the air pipe are easy to generate obvious scratches, and the subsequent connection and matching with the compressor are easy to be affected; on the contrary, when the output power of the laser emitting device is too small, foreign matters on the surfaces of the liquid storage tank body and the air pipe cannot be completely cleaned, residues exist easily, poor spraying is caused, paint is easy to strip, and the service life of the liquid storage tank is influenced.
As a preferable scheme of this embodiment, the focal length of the high-frequency pulse laser emitted by the laser emitting device in step S6 is 250mm to 255mm. In the focal distance range, the cleaning effect of the high-frequency pulse laser on the liquid storage tank body and the air pipe is stable.
As a preferable scheme of this embodiment, the processing time of the high-frequency pulse laser emitted by the laser emitting device to the annular flange is 8s to 10s, and the processing time to the air pipe portion exposed outside the liquid storage tank body is 10s to 15s. It should be noted that when the processing time of the high-frequency pulse laser to the annular flanging or the air pipe is too long, the surfaces of the liquid storage tank body and the air pipe are easy to generate obvious scratches, and the subsequent connection and matching with the compressor are easy to be affected; on the contrary, when the processing time of the high-frequency pulse laser to the annular flanging or the air pipe is too short, foreign matters on the surfaces of the liquid storage tank body and the air pipe cannot be completely cleaned, residues exist easily, poor spraying is caused, paint is easily removed, and the service life of the liquid storage tank is influenced.
As a preferable scheme of the embodiment, the thickness of the surface of the assembly cleaned by the laser is 10um-200um.
The method for removing the foreign matter on the surface of the trachea by the laser is applicable to all compressors.
The method for removing the foreign matters on the surface of the gas pipe by the laser is suitable for removing the foreign matters on the surface of the gas pipe after the gas pipe and the compressor are welded by flame brazing.
Example two
A welding method of an air pipe and a liquid storage tank body comprises the following steps:
s1, ultrasonically cleaning an air pipe to be welded and a liquid storage tank body to be welded, removing surface oil stains, rusting and other defects, and drying;
s2, assembling the air pipe and the liquid storage tank body, installing the assembled air pipe and the liquid storage tank body on a clamping tool of a brazing machine,
s3, filling solder in a gap between the air pipe and the liquid storage tank body;
s4, adjusting a flame welding gun on the brazing machine to a proper position, and enabling the emitted flame to be aligned with the joint of the air pipe and the liquid storage tank body to melt the welding flux;
s5, waiting for the solder to be cooled and solidified so as to fixedly connect the air pipe with the liquid storage tank body to form an assembly;
s6, fixing the assembly on a processing table, arranging a mechanical arm outside the processing table, and installing a laser emitting device on the mechanical arm; and (3) the mechanical arm drives the high-frequency pulse laser emitted by the laser emitting device to irradiate, separate and remove the oxidized and blackened part on the outer surface of the assembly through programming.
EXAMPLE III
A compressor comprises a liquid storage device, wherein the liquid storage device comprises an assembly processed by laser cleaning through the welding method of the air pipe and the liquid storage tank body in the first embodiment or the second embodiment.
In this embodiment, adopt the arm to drive laser emission device, realize the automatic adjustment of the high frequency pulse laser direction that laser emission device jetted out, realize laser cleaning's automation, improved the production efficiency of reservoir. It should be noted that the robot arm is a multi-axis robot arm, and the structure thereof is known in the art and will not be described herein.
The rest of this embodiment is the same as the first embodiment/the second embodiment, and the unexplained features in this embodiment are explained by the first embodiment/the second embodiment, which is not described herein again.
The invention relates to a method for welding an air pipe and a liquid storage tank body, which solves the problem that the method for cleaning the surface of a liquid storage device steel pipe by using a chemical agent to remove oxides easily causes environmental pollution in the prior art through reasonable structural arrangement.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the present invention is not limited to the above-mentioned shapes, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A welding method of an air pipe and a liquid storage tank body is characterized in that: the method comprises the following steps:
s1, cleaning an air pipe to be welded and a liquid storage tank body to be welded, removing surface oil stains, rusting and other defects, and drying;
s2, assembling the air pipe and the liquid storage tank body, installing the assembled air pipe and the liquid storage tank body on a clamping tool of a brazing machine,
s3, filling solder in a gap between the air pipe and the liquid storage tank body;
s4, adjusting a flame welding gun on the brazing machine to a proper position, and enabling the emitted flame to be aligned with the joint of the air pipe and the liquid storage tank body to melt the welding flux;
s5, waiting for the solder to be cooled and solidified so as to fixedly connect the air pipe with the liquid storage tank body to form a combined piece;
s6, taking out the assembly, and irradiating and separating the assembly by high-frequency pulse laser emitted by the laser emitting device to remove the oxide film on the outer surface of the assembly so as to clean foreign matters on the surface of the assembly.
2. The welding method of the air pipe and the liquid storage tank body according to claim 1, characterized in that:
step S6 specifically includes:
the worker holds the laser emitting device or the assembly by hand, and the high-frequency pulse laser emitted by the laser emitting device irradiates the position on the assembly by manual change, so that the high-frequency pulse laser irradiates, separates and removes the oxidized and blackened part on the outer surface of the assembly.
3. The welding method of the air pipe and the liquid storage tank body according to claim 1, characterized in that:
step S6 specifically includes:
fixing the assembly on a processing table, arranging a mechanical arm outside the processing table, and installing a laser emitting device on the mechanical arm; and (3) the mechanical arm drives the high-frequency pulse laser emitted by the laser emitting device to irradiate, separate and remove the oxidized and blackened part on the outer surface of the assembly through programming.
4. A method for welding a gas pipe to a liquid storage tank according to any one of claims 1 to 3, wherein: one end of the liquid storage tank body is provided with an annular flanging, and the middle part of the annular flanging is provided with a connecting hole; the air pipe penetrates through the connecting hole, and the annular flanging is in interference fit with the air pipe; the oxidation film is distributed on the outer surface of the annular flanging and the outer surface of the air pipe part exposed outside the liquid storage tank.
5. The welding method of the air pipe and the liquid storage tank body as claimed in claim 4, wherein: when the annular flanging is cleaned in the step S6, the high-frequency pulse laser is injected along the radial direction of the annular flanging and is wound for at least one circle relative to the annular flanging.
6. The welding method of the air pipe and the liquid storage tank body as claimed in claim 4, wherein: and S6, when the air pipe part exposed outside the liquid storage tank body is cleaned, the high-frequency pulse laser moves back and forth along the axial direction of the air pipe.
7. A method for welding a gas pipe to a liquid storage tank according to any one of claims 1 to 3, wherein: and the output power of the laser emitting device in the step S6 is 60W-65W.
8. A method for welding a gas pipe to a liquid storage tank according to any one of claims 1 to 3, wherein: and S6, the focal length of the high-frequency pulse laser emitted by the laser emitting device is 250-255 mm.
9. A method for welding a gas pipe to a liquid storage tank according to any one of claims 1 to 3, wherein: the processing time of the high-frequency pulse laser emitted by the laser emitting device on the annular flanging is 8-10 s, and the processing time on the air pipe part exposed outside the liquid storage tank body is 10-15 s.
10. A compressor, characterized by: a liquid storage device, which comprises a laser cleaned assembly processed by the method for welding the air pipe and the liquid storage tank body according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211509255.1A CN115870586A (en) | 2022-11-29 | 2022-11-29 | Welding method for air pipe and liquid storage tank body and compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211509255.1A CN115870586A (en) | 2022-11-29 | 2022-11-29 | Welding method for air pipe and liquid storage tank body and compressor |
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| Publication Number | Publication Date |
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| CN115870586A true CN115870586A (en) | 2023-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211509255.1A Pending CN115870586A (en) | 2022-11-29 | 2022-11-29 | Welding method for air pipe and liquid storage tank body and compressor |
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| CN (1) | CN115870586A (en) |
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- 2022-11-29 CN CN202211509255.1A patent/CN115870586A/en active Pending
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