CN112077533B - Copper-iron composite connecting pipe and preparation method and application thereof - Google Patents
Copper-iron composite connecting pipe and preparation method and application thereof Download PDFInfo
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- CN112077533B CN112077533B CN202010813842.4A CN202010813842A CN112077533B CN 112077533 B CN112077533 B CN 112077533B CN 202010813842 A CN202010813842 A CN 202010813842A CN 112077533 B CN112077533 B CN 112077533B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
- F16L9/04—Reinforced pipes
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Abstract
The invention relates to the technical field of air conditioner accessories, in particular to a copper-iron composite connecting pipe and a preparation method and application thereof, wherein the copper-iron composite connecting pipe is made of a copper-iron composite plate coiled pipe, and the copper-iron composite plate is formed by rolling an upper copper layer, a middle iron base layer and a lower copper layer which are arranged from top to bottom; the middle iron base layer is made of low-carbon steel or stainless steel, and the upper copper layer and the lower copper layer are made of red copper or brass. The copper-iron composite connecting pipe is made of the copper-iron composite plate coiled pipe, the copper-iron composite plate adopts a three-layer structure, the copper-iron adhesion strength can be improved, the strength of the iron composite connecting pipe is obviously improved, the cost of the connecting pipe is reduced, in addition, the copper-iron composite connecting pipe made of the coiled pipe is beneficial to welding with accessories by adopting resistance welding, the high flame operation temperature and CO (carbon monoxide) in the traditional welding are avoided2Row amplification, low welding efficiency and high quality leakage reject ratio; the strength of the air-conditioning compressor is obviously improved by applying the copper-iron composite connecting pipe to the air-conditioning compressor.
Description
Technical Field
The invention relates to the technical field of air conditioner accessories, in particular to a copper-iron composite connecting pipe and a preparation method and application thereof.
Background
The air conditioner and the connecting pipe fitting for the air conditioner compressor are mainly provided with an air conditioner compressor exhaust pipe, an air suction outer pipe, a connecting pipe, an air conditioner compressor liquid storage device exhaust pipe and an air conditioner pipe.
The existing exhaust pipe has two structures, the first structure is a pure copper pipe, the pure copper pipe is welded with an upper cover (SPHD material) through flame brazing, the material is high in cost and easy to deform, silver-containing solder is needed for flame brazing, the cost is further increased, the flame heating operation temperature is high, the energy consumption is high, and CO is high2The row is enlarged, the welding efficiency is low, the quality leakage is poor, the flame brazing is easy to cause the overburning phenomenon of the copper pipe, and the strength of the copper pipe is reduced; the second type is a steel base and copper pipe type, and is welded with an upper cover (SPHD material) through flame brazing, compared with the first type, the welding process is changed into resistance welding, the cost of silver-containing solder is eliminated, the pure copper pipe material of the type has high cost, copper-based solder is required for welding the steel base and the pure copper pipe, and the welding is carried out through high-frequency welding or furnace-through welding, so that the welding process is complex, the energy consumption is high, and the quality leakage is poor. In addition, when the welding is carried out with the upper cover in resistance welding, the heat quantity is high,the solder between the steel base and the copper pipe is easy to melt and sink, and the hollow hole penetrates through the solder and secondary leakage occurs.
The existing air suction outer pipe has a three-center structure. The first type is a steel base and a pure copper pipe, the material cost of the sample is high, copper-based welding flux is needed to be welded through furnace welding or high-frequency welding, the energy consumption is high, the quality leakage is poor, in addition, when the sample is welded with an upper cover in an electric resistance mode, the heat is high, the welding flux between the steel base and the copper pipe is easy to melt and sink, a hollow hole penetrates through the hollow hole, and secondary leakage occurs. The second type is an iron-copper plating integrated type which is manufactured by pipe machining and electroplating, the pipe material has long time for adjusting, multiple material specifications, complex machining procedures, multiple quality control items, poor quality, large product size fluctuation, large electroplating process, large environmental pollution, large quality fluctuation of electroplating strength, thickness and the like. The third is a copper-iron composite stamping and stretching forming style, and compared with the first two types, the sample has the advantages of greatly reduced cost and stable quality. But has high requirements on a punch press and a die, short service life of the die and large noise pollution.
In addition, the connecting pipe at the joint of the liquid storage device air suction and exhaust pipe and the compressor is a pure copper pipe type, and the connecting pipe and the liquid storage device exhaust pipe are welded by flame brazing by using copper-based welding flux, the type has high material cost, high flame heating operation temperature, high energy consumption and CO2The row is enlarged, the welding efficiency is low, the quality leakage is poor, the flame brazing is easy to cause the overburning phenomenon of the copper pipe, and the strength of the copper pipe is reduced.
The air conditioner tubing is a pure copper tube, and is welded with the matching part by flame brazing, the material cost of the style is high, the flame heating operation temperature is high, the energy consumption is high, and CO is high2The row is enlarged, the welding efficiency is low, the quality leakage is poor, the flame brazing is easy to cause the overburning phenomenon of the copper pipe, and the strength of the copper pipe is reduced.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide the copper-iron composite connecting pipe, the copper-iron composite connecting pipe is made of a copper-iron composite plate coiled pipe, the copper-iron composite plate adopts a three-layer structure of an upper copper layer, a middle iron base layer and a lower copper layer, the copper-iron adhesion strength can be improved, and the iron composite connecting is remarkably improvedThe strength of the pipe reduces the cost of the connecting pipe, in addition, the copper-iron composite connecting pipe made of the reelpipe is beneficial to adopting resistance welding and fitting welding, and avoids the problems of high temperature, large energy consumption and CO caused by adopting flame operation in the traditional welding method2Row enlargement, low welding efficiency and high quality leakage defective rate.
The invention also aims to provide a preparation method of the copper-iron composite connecting pipe, which is simple and efficient, convenient to operate and control, high in quality of produced products, low in cost and beneficial to industrial production.
The invention further aims to provide an application of the copper-iron composite connecting pipe, the copper-iron composite connecting pipe is applied to the air-conditioning compressor, the strength of the air-conditioning compressor is obviously improved, the use amount of a metal pipe section with higher cost, especially the use amount of the existing universal copper can be reduced according to the actual use requirement, the purpose of reducing the cost of a compressor pipe fitting is achieved, the overall cost of the compressor is well controlled finally, meanwhile, resistance welding is adopted among the pipe sections, and the problems of high flame operation temperature, high energy consumption, CO (carbon monoxide) and the like in the traditional welding are avoided2Row enlargement, low welding efficiency and high quality leakage defective rate.
The purpose of the invention is realized by the following technical scheme: a copper-iron composite connecting pipe is manufactured by coiling a copper-iron composite plate, wherein the copper-iron composite plate is formed by rolling an upper copper layer, a middle iron base layer and a lower copper layer which are arranged from top to bottom; the middle iron base layer is made of low-carbon steel or stainless steel, and the upper copper layer and the lower copper layer are made of red copper or brass; preferably, the upper copper layer and the lower copper layer cover two side edges of the middle iron-based layer.
The copper-iron composite connecting pipe is manufactured by adopting a copper-iron composite plate coiled pipe, the copper-iron composite plate adopts a three-layer structure of an upper copper layer, a middle iron base layer and a lower copper layer, so that the copper-iron adhesion strength can be improved, the strength of the iron composite connecting pipe is obviously improved, the cost of the coiled pipe is reduced, the upper copper layer and the lower copper layer are controlled to coat the two side edges of the middle iron base layer, and the adoption of electricity at the pipe joint when the copper-iron composite plate coiled pipe is coiled is facilitatedWeld and hinder and weld for middle iron-based layer is rolled to be sealed in between upside copper layer and downside copper layer and then has protected middle iron-based layer not corroded by the air, in addition, the reelpipe makes copper iron composite connection pipe and is favorable to adopting resistance welding and accessory to weld, has avoided traditional welding to adopt flame operation high temperature, energy consumption big, CO2Row enlargement, low welding efficiency and high quality leakage defective rate.
Preferably, the copper-iron composite plate is prepared by the following steps:
1) preparing materials: preparing a low-carbon steel plate or a stainless steel plate and a copper plate with the thickness of 0.1-200 mu m for later use;
2) surface treatment: putting the low-carbon steel plate or the stainless steel plate and the copper plate in the step 1) into a passivating agent for surface passivation, and cleaning and drying the copper plate in the step 1) by using clear water for later use;
3) rolling the plate: clamping a low-carbon steel plate or a stainless steel plate between two layers of copper plates, putting the copper plates into a steel roller for pressing, wherein the two sides of each copper plate are wider than the low-carbon steel plate or the stainless steel plate, and controlling a press roller to press the copper plates with the raised edges to obtain a semi-finished plate;
4) and (3) heat treatment: heating the semi-finished plate obtained by pressing in the step 3) to the temperature of 200-1000 ℃ in vacuum and preserving the heat for 0.5-20h for later use;
5) surface finishing: finishing the surface of the semi-finished plate subjected to the heat treatment in the step 4) by using a steel roller;
6) surface cleaning: and (3) putting the plate subjected to finishing treatment in the step 5) into cleaning fluid for oil and rust removal treatment, and drying to obtain a finished copper-iron composite plate.
Preferably, in the step 2), the passivating agent is a mixed solution composed of aqua regia and deionized water according to a weight ratio of 0.8-1.0: 0.8-1.2; in the step 2), the time of passivation is 10s-5min, and the roughness of the surface of the passivated low-carbon steel plate or stainless steel plate is 0.05-1.0 mm; in the step 3), the pressure of the steel roller during the compaction treatment is 200-520 MPa; in the step 6), the cleaning solution is a mixture consisting of an oil and rust removing agent, a thin layer rust removing agent and deionized water, and the time for carrying out oil and rust removing treatment is 10-15 s; more preferably, the cleaning solution is a mixture consisting of an XH-301 oil and rust removing agent, an X-607 thin layer rust removing agent and deionized water according to the weight ratio of 0.1-0.15:0.2-0.3:5-6, wherein the XH-301 oil and rust removing agent is produced by spring rain chemical technology limited, Guangzhou, and the X-607 thin layer rust removing agent is produced by Polyfortron lubrication technology limited, Dongguan.
More preferably, the copper-iron composite board prepared by the method is also used for rolling an exhaust pipe, an air suction outer pipe, an air suction pipe of an air conditioner compressor, an exhaust pipe of an air reservoir and an air conditioning pipe.
The copper-iron composite board is prepared by the method, the copper-iron composite board prepared by the method has a three-layer structure of the upper copper layer, the middle iron base layer and the lower copper layer, so that the copper-iron adhesion strength can be improved, the strength of the iron composite connecting pipe is obviously improved, the cost of the connecting pipe is reduced, the upper copper layer and the lower copper layer are controlled to coat the edges of the two sides of the middle iron base layer, so that the pipe joint is welded by resistance welding when the copper-iron composite board is reeled, the middle iron base layer is rolled and sealed between the upper copper layer and the lower copper layer, the middle iron base layer is protected from being corroded by air, in addition, the copper-iron composite connecting pipe prepared by the reeled pipe is beneficial to welding with accessories by resistance welding, and the problems that the traditional welding method adopts high flame operation temperature, high energy consumption and CO (carbon monoxide) are avoided2Row amplification, low welding efficiency and high quality leakage reject ratio; in the preparation process, the heat preservation time of the vacuum heating to 200-1000 ℃ in the step 4) needs to be strictly controlled for 0.5-20h, if the heat preservation time is too short, the atom bonding force between iron atoms and copper atoms is not favorable, and further the three-layer structure is not favorable for being pressed, so that the copper-iron composite plate is easy to generate orange peel or separation, and if the heat preservation time is too long, the production cost is not favorable for being reduced; in addition, the dosage and the proportion of the raw materials of the passivating agent are controlled, the raw materials of the passivating agent are controlled within the range, the surface roughness of the low-carbon steel plate or the stainless steel plate is favorably controlled to be 0.05-1.0mm, the surface roughness of the passivated low-carbon steel plate or the passivated stainless steel plate is controlled to be 0.05-1.0mm, and if the roughness is too large, the deep combination between atoms between iron atoms and copper atoms is not facilitatedIf the roughness is too small, the deep bonding between atoms between iron atoms and copper atoms is also not facilitated, and the adhesion strength among the three-layer structures of the upper copper layer, the middle iron-based layer and the lower copper layer is further not facilitated.
The invention also provides a preparation method of the copper-iron composite connecting pipe, which comprises the following steps:
s1, washing the copper-iron composite board prepared in the step 6) for 1-3 times by using deionized water, and drying for later use;
s2, compacting and leveling the cleaned copper-iron composite board in the S1 by using a steel roller, and leveling for later use;
s3, placing the copper-iron composite board leveled in the step S2 on a pipe coiling machine for pipe coiling operation, and welding pipe gaps after pipe coiling to obtain a semi-finished product of the copper-iron composite connecting pipe for later use; when welding, any one of electric welding, argon arc welding, plasma welding, CO2 shielded welding, resistance welding, laser welding and high-frequency welding is adopted;
s4, deburring and deburring the welding part of the semi-finished product of the copper-iron composite connecting pipe obtained after welding in the step S3, and then finishing the semi-finished product of the copper-iron composite connecting pipe;
s5, cutting the semi-finished product of the finishing copper-iron composite connecting pipe in the step S4 into specific lengths as required, and performing port expanding treatment on the cut copper-iron composite connecting pipe;
s6, degreasing, deslagging and cleaning the copper-iron composite connecting pipe molded in the step S5 to obtain a finished product of the copper-iron composite connecting pipe.
The copper-iron composite connecting pipe is prepared by the method, and the copper-iron composite connecting pipe prepared by the method has the advantages that the copper-iron composite plate adopts the three-layer structure of the upper copper layer, the middle iron base layer and the lower copper layer, so that the copper-iron adhesion strength can be improved, the strength of the iron composite connecting pipe is obviously improved, the cost of the connecting pipe is reduced, in addition, the copper-iron composite connecting pipe prepared by the pipe coiling is beneficial to welding by adopting resistance welding and accessories, and the problems of high flame operation temperature, high energy consumption and CO (carbon monoxide) in the traditional welding are avoided2Row enlargement, low welding efficiency and high quality leakage defective rateThe disadvantages are that; in addition, the preparation method is simple and efficient, convenient to operate and control, high in quality of produced products, low in cost and beneficial to industrial production.
The invention also provides a connecting pipe fitting for applying the copper-iron composite connecting pipe to an air-conditioning compressor; more preferably, the expanded pipe end of the copper-iron composite connecting pipe is resistance welded with the air suction port of the compressor shell, and the other end of the copper-iron composite connecting pipe is resistance welded with the exhaust pipe of the liquid reservoir.
The copper-iron composite connecting pipe is applied to connecting pipe fittings of an air-conditioning compressor, the strength of the air-conditioning compressor is obviously improved, the use amount of a metal pipe section with higher cost, particularly the use amount of the existing universal copper can be replaced according to actual use requirements, so that the purpose of reducing the cost of the compressor pipe fitting is achieved, the overall cost of the compressor is well controlled finally, meanwhile, resistance welding is adopted among the pipe sections, and the problems of high flame operation temperature, high energy consumption and CO (carbon monoxide) in the traditional welding are avoided2Row enlargement, low welding efficiency and high quality leakage defective rate.
The invention has the beneficial effects that: the copper-iron composite connecting pipe is manufactured by adopting the coiled pipe made of the copper-iron composite plate, the structures of the upper copper layer, the middle iron base layer and the lower copper layer of the copper-iron composite plate can improve the adhesion strength of copper and iron, remarkably improve the strength of the iron composite connecting pipe and reduce the cost of the connecting pipe, and in addition, the copper-iron composite connecting pipe made of the coiled pipe is beneficial to adopting resistance welding and fitting welding, so that the problems of high flame operation temperature, high energy consumption and CO (carbon monoxide) in the traditional welding method are avoided2Row enlargement, low welding efficiency and high quality leakage defective rate.
The preparation method of the copper-iron composite connecting pipe is simple and efficient, convenient to operate and control, high in quality of produced products, low in cost and beneficial to industrial production.
The copper-iron composite connecting pipe is applied to the air-conditioning compressor, the strength of the air-conditioning compressor is obviously improved, the use amount of metal pipe sections with higher cost can be reduced according to actual use requirements, particularly the use amount of the existing universal copper, so that the cost of compressor pipe fittings is reducedThe purpose is to finally control the overall cost of the compressor well, and simultaneously, the resistance welding is adopted between pipe sections, thereby avoiding the problems of high temperature, high energy consumption and CO caused by the adoption of flame operation in the traditional welding2Row enlargement, low welding efficiency and high quality leakage defective rate.
Drawings
FIG. 1 is a schematic cross-sectional view of a copper-iron composite connecting pipe according to the present invention;
FIG. 2 is a cross-sectional view of the copper-iron composite connecting pipe and a cross-sectional view of a copper-iron composite plate according to the present invention;
FIG. 3 is a schematic cross-sectional view of another copper-iron composite connecting pipe according to the present invention;
FIG. 4 is a cross-sectional view of another copper-iron composite connecting pipe and a cross-sectional view of a copper-iron composite plate according to the present invention;
fig. 5 is a combined schematic view of the copper-iron composite connecting pipe applied to an air conditioner compressor according to the present invention.
The reference signs are: the composite material comprises 1-copper-iron composite connecting pipes, 11-copper-iron composite plates, 111-upper copper layers, 112-middle iron base layers, 113-lower copper layers, 114-lower iron base layers, 2-compressor shells, 3-liquid reservoirs and 31-exhaust pipes.
Detailed Description
For the understanding of those skilled in the art, the present invention will be further described with reference to the following examples and accompanying fig. 1-5, which are not intended to limit the present invention.
Example 1
A copper-iron composite connecting pipe is characterized in that a copper-iron composite connecting pipe 1 is made by coiling a copper-iron composite plate 11, wherein the copper-iron composite plate 11 is formed by rolling an upper copper layer 111, a middle iron base layer 112 and a lower copper layer 113 which are arranged from top to bottom; the middle iron-based layer 112 is made of low-carbon steel, and the upper copper layer 111 and the lower copper layer 113 are made of red copper; preferably, the upper copper layer 111 and the lower copper layer 113 cover both side edges of the middle iron base layer 112.
The copper-iron composite board 11 is prepared by the following steps:
1) preparing materials: preparing a low-carbon steel plate and a copper plate with the thickness of 0.1 mu m for later use;
2) surface treatment: putting the low-carbon steel plate and the copper plate in the step 1) into a passivating agent for surface passivation, and cleaning and drying the copper plate in the step 1) by using clear water for later use;
3) rolling the plate: clamping a low-carbon steel plate between two layers of copper plates, putting the copper plates into a steel roller for pressing, wherein the two sides of each copper plate are wider than the low-carbon steel plate, and controlling a press roller to press the copper plates with the raised edges to obtain a semi-finished plate;
4) and (3) heat treatment: heating the semi-finished plate obtained by pressing in the step 3) to 200 ℃ in vacuum and preserving heat for 0.5h for later use;
5) surface finishing: finishing the surface of the semi-finished plate subjected to the heat treatment in the step 4) by using a steel roller;
6) surface cleaning: and (3) putting the plate subjected to finishing treatment in the step 5) into cleaning fluid for oil and rust removal treatment, and drying to obtain a finished copper-iron composite plate 11.
In the step 2), the passivating agent is a mixed solution of aqua regia and deionized water according to a weight ratio of 0.8: 0.8;
in the step 2), the time of passivation is 10s, and the roughness of the surface of the passivated low-carbon steel plate is 0.05 mm;
in the step 3), the pressure of the steel roller during compaction treatment is 200 MPa;
in the step 6), the cleaning solution is a mixture of an XH-301 oil and rust removing agent, an X-607 thin layer rust removing agent and deionized water according to a weight ratio of 0.1:0.2: 5.
The preparation method of the copper-iron composite connecting pipe 1 comprises the following steps:
s1, washing the copper-iron composite board 11 prepared in the step 6) for 1 time by using deionized water, and drying for later use;
s2, compacting and leveling the cleaned copper-iron composite board 11 in the S1 by using a steel roller, and leveling for later use;
s3, placing the copper-iron composite board 11 leveled in the step S2 on a pipe coiling machine for pipe coiling operation, and welding pipe gaps after pipe coiling to obtain a semi-finished product of the copper-iron composite connecting pipe 1 for later use;
s4, deburring and deburring the welding part of the semi-finished product of the copper-iron composite connecting pipe 1 obtained after welding in the step S3, and then finishing the semi-finished product of the copper-iron composite connecting pipe 1;
s5, cutting the semi-finished product of the finishing copper-iron composite connecting pipe 1 in the step S4 into a specific length according to requirements, and performing port pipe expanding treatment on the cut copper-iron composite connecting pipe 1;
s6, degreasing, deslagging and cleaning the copper-iron composite connecting pipe 1 molded in the step S5 to obtain a finished product of the copper-iron composite connecting pipe 1; the length of the copper-iron welding joint of the cross section of the copper-iron composite connecting pipe 1 is 0.05 mm.
In step S3, electric welding is used for welding.
In this embodiment, the copper-iron composite connecting pipe 1 is applied to a connecting pipe fitting in an air conditioner compressor, an expansion pipe end of the copper-iron composite connecting pipe 1 is resistance-welded to an air suction port of a compressor housing 2, and the other end of the copper-iron composite connecting pipe 1 is resistance-welded to an exhaust pipe 31 of a liquid reservoir 3.
Example 2
A copper-iron composite connecting pipe is characterized in that a copper-iron composite connecting pipe 1 is made by coiling a copper-iron composite plate 11, wherein the copper-iron composite plate 11 is formed by rolling an upper copper layer 111, a middle iron base layer 112 and a lower copper layer 113 which are arranged from top to bottom; the middle iron-based layer 112 is made of stainless steel, and the upper copper layer 111 and the lower copper layer 113 are made of brass; preferably, the upper copper layer 111 and the lower copper layer 113 cover both side edges of the middle iron base layer 112.
The copper-iron composite board 11 is prepared by the following steps:
1) preparing materials: preparing a stainless steel plate and a copper plate with the thickness of 50 mu m for standby;
2) surface treatment: putting the stainless steel plate and the copper plate in the step 1) into a passivating agent for surface passivation treatment, and cleaning and drying the copper plate in the step 1) by using clear water for later use;
3) rolling the plate: clamping a stainless steel plate between two layers of copper plates, putting the copper plates into a steel roller for pressing, controlling a press roller to press the copper plates with the raised edges to obtain a semi-finished plate, wherein the two sides of each copper plate are wider than the stainless steel plate;
4) and (3) heat treatment: heating the semi-finished plate obtained by pressing in the step 3) to 400 ℃ in vacuum and preserving heat for 5 hours for later use;
5) surface finishing: finishing the surface of the semi-finished plate subjected to the heat treatment in the step 4) by using a steel roller;
6) surface cleaning: and (3) putting the plate subjected to finishing treatment in the step 5) into cleaning fluid for oil and rust removal treatment, and drying to obtain a finished copper-iron composite plate 11.
In the step 2), the passivating agent is a mixed solution of aqua regia and deionized water according to a weight ratio of 0.85: 0.9;
in the step 2), the time of passivation is 80s, and the roughness of the surface of the stainless steel plate after passivation is 0.25 mm;
in the step 3), the pressure of the steel roller during compaction treatment is 280 MPa;
in the step 6), the cleaning solution is a mixture of an XH-301 oil and rust removing agent, an X-607 thin layer rust removing agent and deionized water according to a weight ratio of 0.11:0.23: 5.3.
The preparation method of the copper-iron composite connecting pipe 1 comprises the following steps:
s1, washing the copper-iron composite board 11 prepared in the step 6) for 1 time by using deionized water, and drying for later use;
s2, compacting and leveling the cleaned copper-iron composite board 11 in the S1 by using a steel roller, and leveling for later use;
s3, placing the copper-iron composite board 11 leveled in the step S2 on a pipe coiling machine for pipe coiling operation, and welding the pipe gaps by plasma welding after pipe coiling to obtain a semi-finished product of the copper-iron composite connecting pipe 1 for later use;
s4, deburring and deburring the welding part of the semi-finished product of the copper-iron composite connecting pipe 1 obtained after welding in the step S3, and then finishing the semi-finished product of the copper-iron composite connecting pipe 1;
s5, cutting the semi-finished product of the finishing copper-iron composite connecting pipe 1 in the step S4 into a specific length according to requirements, and performing port pipe expanding treatment on the cut copper-iron composite connecting pipe 1;
s6, degreasing, deslagging and cleaning the copper-iron composite connecting pipe 1 molded in the step S5 to obtain a finished product of the copper-iron composite connecting pipe 1; the length of the copper-iron welding joint of the cross section of the copper-iron composite connecting pipe 1 is 1 mm.
In this embodiment, the copper-iron composite connecting pipe 1 is applied to a connecting pipe fitting in an air conditioner compressor, an expansion pipe end of the copper-iron composite connecting pipe 1 is resistance-welded to an air suction port of a compressor housing 2, and the other end of the copper-iron composite connecting pipe 1 is resistance-welded to an exhaust pipe 31 of a liquid reservoir 3.
Example 3
A copper-iron composite connecting pipe is characterized in that a copper-iron composite connecting pipe 1 is made by coiling a copper-iron composite plate 11, wherein the copper-iron composite plate 11 is formed by rolling an upper copper layer 111, a middle iron base layer 112 and a lower copper layer 113 which are arranged from top to bottom; the middle iron-based layer 112 is made of low-carbon steel, and the upper copper layer 111 and the lower copper layer 113 are made of red copper; preferably, the upper copper layer 111 and the lower copper layer 113 cover both side edges of the middle iron base layer 112.
The copper-iron composite board 11 is prepared by the following steps:
1) preparing materials: preparing a low-carbon steel plate or a stainless steel plate and a copper plate with the thickness of 100 mu m for standby;
2) surface treatment: putting the low-carbon steel plate and the copper plate in the step 1) into a passivating agent for surface passivation, and cleaning and drying the copper plate in the step 1) by using clear water for later use;
3) rolling the plate: clamping a low-carbon steel plate or a stainless steel plate between two layers of copper plates, putting the copper plates into a steel roller for pressing, wherein the two sides of each copper plate are wider than the low-carbon steel plate, and controlling a press roller to press the copper plates with the raised edges to obtain a semi-finished plate;
4) and (3) heat treatment: heating the semi-finished plate obtained by pressing in the step 3) to 600 ℃ in vacuum and preserving heat for 10 hours for later use;
5) surface finishing: finishing the surface of the semi-finished plate subjected to the heat treatment in the step 4) by using a steel roller;
6) surface cleaning: and (3) putting the plate subjected to finishing treatment in the step 5) into cleaning fluid for oil and rust removal treatment, and drying to obtain a finished copper-iron composite plate 11.
In the step 2), the passivating agent is a mixed solution of aqua regia and deionized water according to a weight ratio of 0.9: 1.0;
in the step 2), the time of passivation is 150s, and the roughness of the surface of the passivated low-carbon steel plate or stainless steel plate is 0.5 mm;
in the step 3), the pressure of the steel roller during compaction treatment is 360 MPa;
in the step 6), the cleaning solution is a mixture of an XH-301 oil and rust removing agent, an X-607 thin layer rust removing agent and deionized water according to a weight ratio of 0.13:0.25: 5.5.
The preparation method of the copper-iron composite connecting pipe 1 comprises the following steps:
s1, washing the copper-iron composite board 11 prepared in the step 6) for 2 times by using deionized water, and drying for later use;
s2, compacting and leveling the cleaned copper-iron composite board 11 in the S1 by using a steel roller, and leveling for later use;
s3, placing the copper-iron composite board 11 leveled in the step S2 on a pipe coiling machine for pipe coiling operation, and welding pipe gaps by adopting resistance welding after pipe coiling to obtain a semi-finished product of the copper-iron composite connecting pipe 1 for later use;
s4, deburring and deburring the welding part of the semi-finished product of the copper-iron composite connecting pipe 1 obtained after welding in the step S3, and then finishing the semi-finished product of the copper-iron composite connecting pipe 1;
s5, cutting the semi-finished product of the finishing copper-iron composite connecting pipe 1 in the step S4 into a specific length according to requirements, and performing port pipe expanding treatment on the cut copper-iron composite connecting pipe 1;
s6, degreasing, deslagging and cleaning the copper-iron composite connecting pipe 1 molded in the step S5 to obtain a finished product of the copper-iron composite connecting pipe 1; the length of the copper-iron welding joint of the cross section of the copper-iron composite connecting pipe 1 is 2.55 mm.
In this embodiment, the copper-iron composite connecting pipe 1 is applied to a connecting pipe fitting in an air conditioner compressor, an expansion pipe end of the copper-iron composite connecting pipe 1 is resistance-welded to an air suction port of a compressor housing 2, and the other end of the copper-iron composite connecting pipe 1 is resistance-welded to an exhaust pipe 31 of a liquid reservoir 3.
Example 4
A copper-iron composite connecting pipe is characterized in that a copper-iron composite connecting pipe 1 is made by coiling a copper-iron composite plate 11, wherein the copper-iron composite plate 11 is formed by rolling an upper copper layer 111, a middle iron base layer 112 and a lower copper layer 113 which are arranged from top to bottom; the middle iron-based layer 112 is made of stainless steel, and the upper copper layer 111 and the lower copper layer 113 are made of brass; preferably, the upper copper layer 111 and the lower copper layer 113 cover both side edges of the middle iron base layer 112.
The copper-iron composite board 11 is prepared by the following steps:
1) preparing materials: preparing a low-carbon steel plate or a stainless steel plate and a copper plate with the thickness of 150 mu m for standby;
2) surface treatment: putting the stainless steel plate and the copper plate in the step 1) into a passivating agent for surface passivation treatment, and cleaning and drying the copper plate in the step 1) by using clear water for later use;
3) rolling the plate: clamping a stainless steel plate between two layers of copper plates, putting the copper plates into a steel roller for pressing, controlling a press roller to press the copper plates with the raised edges to obtain a semi-finished plate, wherein the two sides of each copper plate are wider than the stainless steel plate;
4) and (3) heat treatment: heating the semi-finished plate obtained by pressing in the step 3) to 800 ℃ in vacuum and preserving heat for 15 hours for later use;
5) surface finishing: finishing the surface of the semi-finished plate subjected to the heat treatment in the step 4) by using a steel roller;
6) surface cleaning: and (3) putting the plate subjected to finishing treatment in the step 5) into cleaning fluid for oil and rust removal treatment, and drying to obtain a finished copper-iron composite plate 11.
In the step 2), the passivating agent is a mixed solution of aqua regia and deionized water according to a weight ratio of 0.95: 1.1;
in the step 2), the time of passivation is 230s, and the roughness of the surface of the passivated low-carbon steel plate or stainless steel plate is 0.75 mm;
in the step 3), the pressure of the steel roller during compaction treatment is 440 MPa;
in the step 6), the cleaning solution is a mixture of an XH-301 oil and rust removing agent, an X-607 thin layer rust removing agent and deionized water according to a weight ratio of 0.14:0.28: 5.8.
The preparation method of the copper-iron composite connecting pipe 1 comprises the following steps:
s1, washing the copper-iron composite board 11 prepared in the step 6) for 3 times by using deionized water, and drying for later use;
s2, compacting and leveling the cleaned copper-iron composite board 11 in the S1 by using a steel roller, and leveling for later use;
s3, placing the copper-iron composite board 11 leveled in the step S2 on a pipe coiling machine for pipe coiling operation, and welding pipe gaps by laser welding after pipe coiling to obtain a semi-finished product of the copper-iron composite connecting pipe 1 for later use;
s4, deburring and deburring the welding part of the semi-finished product of the copper-iron composite connecting pipe 1 obtained after welding in the step S3, and then finishing the semi-finished product of the copper-iron composite connecting pipe 1;
s5, cutting the semi-finished product of the finishing copper-iron composite connecting pipe 1 in the step S4 into a specific length according to requirements, and performing port pipe expanding treatment on the cut copper-iron composite connecting pipe 1;
s6, degreasing, deslagging and cleaning the copper-iron composite connecting pipe 1 molded in the step S5 to obtain a finished product of the copper-iron composite connecting pipe 1; the length of the copper-iron welding joint of the cross section of the copper-iron composite connecting pipe 1 is 4 mm.
In this embodiment, the copper-iron composite connecting pipe 1 is applied to a connecting pipe fitting in an air conditioner compressor, an expansion pipe end of the copper-iron composite connecting pipe 1 is resistance-welded to an air suction port of a compressor housing 2, and the other end of the copper-iron composite connecting pipe 1 is resistance-welded to an exhaust pipe 31 of a liquid reservoir 3.
Example 5
A copper-iron composite connecting pipe is characterized in that a copper-iron composite connecting pipe 1 is made by coiling a copper-iron composite plate 11, wherein the copper-iron composite plate 11 is formed by rolling an upper copper layer 111, a middle iron base layer 112 and a lower copper layer 113 which are arranged from top to bottom; the middle iron-based layer 112 is made of low-carbon steel, and the upper copper layer 111 and the lower copper layer 113 are made of red copper; preferably, the upper copper layer 111 and the lower copper layer 113 cover both side edges of the middle iron base layer 112.
The copper-iron composite board 11 is prepared by the following steps:
1) preparing materials: preparing a low-carbon steel plate and a copper plate with the thickness of 200 mu m for standby;
2) surface treatment: putting the low-carbon steel plate and the copper plate in the step 1) into a passivating agent for surface passivation, and cleaning and drying the copper plate in the step 1) by using clear water for later use;
3) rolling the plate: clamping a low-carbon steel plate between two layers of copper plates, putting the copper plates into a steel roller for pressing, wherein the two sides of each copper plate are wider than the low-carbon steel plate, and controlling a press roller to press the copper plates with the raised edges to obtain a semi-finished plate;
4) and (3) heat treatment: heating the semi-finished plate obtained by pressing in the step 3) to 1000 ℃ in vacuum and preserving heat for 20 hours for later use;
5) surface finishing: finishing the surface of the semi-finished plate subjected to the heat treatment in the step 4) by using a steel roller;
6) surface cleaning: and (3) putting the plate subjected to finishing treatment in the step 5) into cleaning fluid for oil and rust removal treatment, and drying to obtain a finished copper-iron composite plate 11.
In the step 2), the passivating agent is a mixed solution of aqua regia and deionized water according to the weight ratio of 1.0: 1.2;
in the step 2), the time of passivation is 300s, and the roughness of the surface of the passivated low-carbon steel plate or stainless steel plate is 1.0 mm;
in the step 3), the pressure of the steel roller during compaction treatment is 520 MPa;
in the step 6), the cleaning solution is a mixture of an XH-301 oil and rust removing agent, an X-607 thin layer rust removing agent and deionized water according to a weight ratio of 0.15:0.3: 6.
The preparation method of the copper-iron composite connecting pipe 1 comprises the following steps:
s1, washing the copper-iron composite board 11 prepared in the step 6) for 3 times by using deionized water, and drying for later use;
s2, compacting and leveling the cleaned copper-iron composite board 11 in the S1 by using a steel roller, and leveling for later use;
s3, placing the copper-iron composite board 11 leveled in the step S2 on a pipe coiling machine for pipe coiling operation, and welding pipe gaps by adopting high-frequency welding after pipe coiling to obtain a semi-finished product of the copper-iron composite connecting pipe 1 for later use;
s4, deburring and deburring the welding part of the semi-finished product of the copper-iron composite connecting pipe 1 obtained after welding in the step S3, and then finishing the semi-finished product of the copper-iron composite connecting pipe 1;
s5, cutting the semi-finished product of the finishing copper-iron composite connecting pipe 1 in the step S4 into a specific length according to requirements, and performing port pipe expanding treatment on the cut copper-iron composite connecting pipe 1;
s6, degreasing, deslagging and cleaning the copper-iron composite connecting pipe 1 molded in the step S5 to obtain a finished product of the copper-iron composite connecting pipe 1; the length of the copper-iron welding joint of the cross section of the copper-iron composite connecting pipe 1 is mm.
In this embodiment, the copper-iron composite connecting pipe 1 is applied to a connecting pipe fitting in an air conditioner compressor, an expansion pipe end of the copper-iron composite connecting pipe 1 is resistance-welded to an air suction port of a compressor housing 2, and the other end of the copper-iron composite connecting pipe 1 is resistance-welded to an exhaust pipe 31 of a liquid reservoir 3.
Example 6
A copper-iron composite connecting pipe is characterized in that a copper-iron composite connecting pipe 1 is made by coiling a copper-iron composite plate 11, and the copper-iron composite plate 11 is formed by rolling an upper copper layer 111 and a lower iron base layer 114 which are arranged from top to bottom; the middle iron-based layer 112 is made of low-carbon steel, and the upper copper layer 111 is made of red copper; preferably, the upper copper layer 111 covers both side edges of the middle iron base layer 112.
The copper-iron composite board 11 is prepared by the following steps:
1) preparing materials: preparing a low-carbon steel plate and a copper plate with the thickness of 200 mu m for standby;
2) surface treatment: putting the low-carbon steel plate and the copper plate in the step 1) into a passivating agent for surface passivation, and cleaning and drying the copper plate in the step 1) by using clear water for later use;
3) rolling the plate: coating a low-carbon steel plate in a copper plate, putting the copper plate into a steel roller for pressing, wherein two sides of the copper plate are wider than the low-carbon steel plate, and controlling a press roller to press the copper plate with the raised edge to obtain a semi-finished plate;
4) and (3) heat treatment: heating the semi-finished plate obtained by pressing in the step 3) to 1000 ℃ in vacuum and preserving heat for 20 hours for later use;
5) surface finishing: finishing the surface of the semi-finished plate subjected to the heat treatment in the step 4) by using a steel roller;
6) surface cleaning: and (3) putting the plate subjected to finishing treatment in the step 5) into cleaning fluid for oil and rust removal treatment, and drying to obtain a finished copper-iron composite plate 11.
In the step 2), the passivating agent is a mixed solution of aqua regia and deionized water according to the weight ratio of 1.0: 1.2;
in the step 2), the time of passivation is 300s, and the roughness of the surface of the passivated low-carbon steel plate or stainless steel plate is 1.0 mm;
in the step 3), the pressure of the steel roller during compaction treatment is 520 MPa;
in the step 6), the cleaning solution is a mixture of an XH-301 oil and rust removing agent, an X-607 thin layer rust removing agent and deionized water according to a weight ratio of 0.15:0.3: 6.
The preparation method of the copper-iron composite connecting pipe 1 comprises the following steps:
s1, washing the copper-iron composite board 11 prepared in the step 6) for 3 times by using deionized water, and drying for later use;
s2, compacting and leveling the cleaned copper-iron composite board 11 in the S1 by using a steel roller, and leveling for later use;
s3, placing the copper-iron composite board 11 leveled in the step S2 on a pipe coiling machine for pipe coiling operation, and welding pipe gaps by adopting high-frequency welding after pipe coiling to obtain a semi-finished product of the copper-iron composite connecting pipe 1 for later use;
s4, deburring and deburring the welding part of the semi-finished product of the copper-iron composite connecting pipe 1 obtained after welding in the step S3, and then finishing the semi-finished product of the copper-iron composite connecting pipe 1;
s5, cutting the semi-finished product of the finishing copper-iron composite connecting pipe 1 in the step S4 into a specific length according to requirements, and performing port pipe expanding treatment on the cut copper-iron composite connecting pipe 1;
s6, degreasing, deslagging and cleaning the copper-iron composite connecting pipe 1 molded in the step S5 to obtain a finished product of the copper-iron composite connecting pipe 1; the length of the copper-iron welding joint of the cross section of the copper-iron composite connecting pipe 1 is 5 mm.
In this embodiment, the copper-iron composite connecting pipe 1 is applied to a connecting pipe fitting in an air conditioner compressor, an expansion pipe end of the copper-iron composite connecting pipe 1 is resistance-welded to an air suction port of a compressor housing 2, and the other end of the copper-iron composite connecting pipe 1 is resistance-welded to an exhaust pipe 31 of a liquid reservoir 3.
The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.
Claims (9)
1. The copper-iron composite connecting pipe is characterized in that: the copper-iron composite connecting pipe is made of a copper-iron composite plate coiled pipe, and the copper-iron composite plate is formed by rolling an upper copper layer, a middle iron base layer and a lower copper layer which are arranged from top to bottom; the middle iron base layer is made of low-carbon steel or stainless steel, and the upper copper layer and the lower copper layer are made of red copper or brass;
the copper-iron composite board is prepared by the following steps:
1) preparing materials: preparing a low-carbon steel plate or a stainless steel plate and a copper plate for later use;
2) surface treatment: putting the low-carbon steel plate or the stainless steel plate, the copper plate and the copper plate in the step 1) into a passivating agent for surface passivation, and cleaning and drying the copper plate in the step 1) by using clear water for later use;
3) rolling the plate: clamping a low-carbon steel plate or a stainless steel plate between two layers of copper plates, putting the copper plates into a press roller for pressing, wherein the two sides of each copper plate are wider than the low-carbon steel plate or the stainless steel plate, and controlling the press roller to press the copper plates with the raised edges to obtain a semi-finished plate;
4) and (3) heat treatment: heating the semi-finished plate obtained by pressing in the step 3) to the temperature of 200-1000 ℃ in vacuum and preserving the heat for 0.5-20h for later use;
5) surface finishing: finishing the surface of the semi-finished plate subjected to the heat treatment in the step 4) by using a press roller;
6) surface cleaning: putting the plate subjected to finishing treatment in the step 5) into cleaning fluid for oil and rust removal treatment, and drying to obtain a finished copper-iron composite plate;
the cleaning solution is a mixture of an XH-301 oil and rust removing agent, an X-607 thin-layer rust removing agent and deionized water according to the weight ratio of 0.1-0.15:0.2-0.3: 5-6.
2. The copper-iron composite connecting pipe according to claim 1, characterized in that: and the upper copper layer and the lower copper layer coat the edges of two sides of the middle iron base layer.
3. The copper-iron composite connecting pipe according to claim 1, characterized in that: in the step 2), the passivating agent is a mixed solution composed of aqua regia and deionized water according to the weight ratio of 0.8-1.0: 0.8-1.2.
4. The copper-iron composite connecting pipe according to claim 1, characterized in that: in the step 2), the time of passivation is 10s-5min, and the roughness of the surfaces of the passivated low-carbon steel plate or stainless steel plate and copper plate is 0.05-1.0 mm.
5. The copper-iron composite connecting pipe according to claim 1, characterized in that: in the step 3), the pressure during the pressing treatment in the pressing roller is 200-520 MPa.
6. The copper-iron composite connecting pipe according to claim 1, characterized in that: in the step 6), the cleaning solution is a mixture consisting of an oil and rust removing agent, a thin layer rust removing agent and deionized water, and the time for carrying out oil and rust removing treatment is 10-15 s.
7. A method for preparing a copper-iron composite connecting pipe according to any one of claims 1 to 6, characterized in that: the method comprises the following steps:
s1, washing the copper-iron composite board prepared in the step 6) with deionized water, and drying for later use;
s2, compacting and leveling the cleaned copper-iron composite board in the S1 by using a steel roller, and leveling for later use;
s3, placing the copper-iron composite board leveled in the step S2 on a pipe coiling machine for pipe coiling operation, and welding pipe gaps after pipe coiling to obtain a semi-finished product of the copper-iron composite connecting pipe for later use;
s4, deburring and deburring the welding part of the semi-finished product of the copper-iron composite connecting pipe obtained after welding in the step S3, and then finishing the semi-finished product of the copper-iron composite connecting pipe;
s5, cutting the semi-finished product of the copper-iron composite connecting pipe subjected to finishing treatment in the step S4 into a specific length, and performing port pipe expanding treatment on the cut copper-iron composite connecting pipe;
s6, removing oil and slag and cleaning the copper-iron composite connecting pipe molded in the step S5 to obtain a finished product of the copper-iron composite connecting pipe; the length of the copper-iron welding joint of the cross section of the copper-iron composite connecting pipe is 0.05-5 mm.
8. The method for preparing the copper-iron composite connecting pipe according to claim 7, wherein the method comprises the following steps: in the step S3, electric welding, argon arc welding, plasma welding and CO are adopted during welding2Any one of shielded welding, resistance welding, laser welding and high-frequency welding.
9. Use of a copper-iron composite connecting pipe according to any one of claims 1 to 6, characterized in that: the copper-iron composite connecting pipe is applied to a connecting pipe fitting of an air-conditioning compressor.
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