Copper-aluminum composite belt production device, copper-aluminum composite pipe, production process and application

Abstract

The invention aims to disclose a copper-aluminum composite belt production device, a copper-aluminum composite pipe, a production process and application, and relates to the technical field of metal composite materials, the copper-aluminum composite belt production device comprises a first compression roller assembly, a first guide roller assembly, a first chamfering assembly, a second chamfering assembly, a second guide roller assembly and a second compression roller assembly; a copper-aluminum composite belt with the breadth ranging from 30 mm to 100 mm and the thickness ranging from 0.5 mm to 8 mm sequentially passes through a first pressing roller assembly, a first guide roller assembly, a first chamfering assembly, a second chamfering assembly, a second guide roller assembly and a second pressing roller assembly in the state that the aluminum face faces upwards. The conical surface of the first conical surface cutter is used for chamfering the first vertex angle of the copper-aluminum composite belt; the first chamfering assembly comprises a first rotating cutter shaft and a first conical surface cutter, the second chamfering assembly comprises a second rotating cutter shaft and a second conical surface cutter, and the conical surface of the second conical surface cutter is used for chamfering the second vertex angle of the copper-aluminum composite belt. And the precision of the formed chamfer is high.

Description

Technical Field

[0001] The present invention relates to the technical field of metal composite materials, and in particular to a copper-aluminum composite strip production device, a copper-aluminum composite pipe, a production process and uses. Background Art

[0002] At present, copper tubes are used for cooling tubes because they are corrosion-resistant and have good thermal conductivity. However, the material cost of copper tubes is relatively high. How to prepare cooling tubes with low cost and comparable heat transfer and corrosion resistance to copper tubes is an industry obstacle that needs to be overcome.

[0003] In view of this, it is necessary to develop a copper-aluminum composite strip production device, a copper-aluminum composite tube, a production process and uses. Summary of the invention

[0004] The purpose of the present invention is to disclose a copper-aluminum composite strip production device, a copper-aluminum composite tube, a production process and uses.

[0005] The first object of the present invention is to provide a production device for a narrow-width copper-aluminum composite strip.

[0006] The second object of the present invention is to provide a production process for a copper-aluminum composite tube.

[0007] The third object of the present invention is to provide a copper-aluminum composite tube.

[0008] The fourth invention objective of the present invention is to provide a use of a copper-aluminum composite pipe.

[0009] To achieve the above first invention objective, the present invention provides a production device for a narrow copper-aluminum composite strip, comprising a first pressing roller assembly, a first guide roller assembly, a first chamfering assembly, a second chamfering assembly, a second guide roller assembly, and a second pressing roller assembly;

[0010] A copper-aluminum composite strip with a width of 30 mm to 100 mm and a thickness of 0.5 mm to 8 mm passes through the first pressing roller assembly, the first guide roller assembly, the first chamfering assembly, the second chamfering assembly, the second guide roller assembly and the second pressing roller assembly in sequence with the aluminum surface facing upward;

[0011] The first pressing roller assembly comprises a first upper roller and a first lower roller, and the copper-aluminum composite strip is inserted between the first upper roller and the first lower roller;

[0012] The first guide roller assembly comprises a first guide roller and a second guide roller, and both sides of the copper-aluminum composite strip are limited by the first guide roller and the second guide roller;

[0013] The first chamfering assembly includes a first rotating knife shaft and a first conical knife, and the conical surface of the first conical knife is used to chamfer the first vertex angle of the copper-aluminum composite strip;

[0014] The second chamfering assembly includes a second rotating knife shaft and a second conical knife, and the conical surface of the second conical knife is used to chamfer the second vertex angle of the copper-aluminum composite strip;

[0015] The second guide roller assembly comprises a third guide roller and a fourth guide roller, and both sides of the copper-aluminum composite strip are limited by the third guide roller and the fourth guide roller;

[0016] The second pressing roller assembly includes a second upper roller and a second lower roller, and the copper-aluminum composite strip passes through between the second upper roller and the second lower roller.

[0017] Preferably, the chamfer angle of the first vertex is 10° to 75°, and the chamfer angle of the second vertex is 10° to 75°.

[0018] Preferably, the copper-aluminum composite material comprises a copper layer and an aluminum layer, and the thickness of the aluminum layer accounts for 50%-70% of the thickness of the copper-aluminum composite material.

[0019] Preferably, the chamfer of the first top angle and the chamfer of the second top angle are both located in the aluminum layer.

[0020] Preferably, the front-to-back distance between the first conical surface knife and the second conical surface knife does not exceed 10 cm;

[0021] The number of cutting edges of the first conical surface knife and the second conical surface knife is 3-6.

[0022] Based on the same inventive principle, in order to achieve the above second inventive object, the present invention provides a production process of a copper-aluminum composite tube, comprising the following steps:

[0023] A copper-aluminum composite material having symmetrical first chamfers and second chamfers on both sides of an aluminum layer is prepared by using a production device for a narrow copper-aluminum composite strip described in the first invention;

[0024] The copper-aluminum composite material is rolled into a copper-aluminum composite tube with the aluminum layer as the inner layer, and the first chamfer and the second chamfer form a defect portion with a triangular cross section;

[0025] The gaps of the copper-aluminum composite pipe are welded by high-frequency welding process to form a copper-aluminum composite pipe.

[0026] Based on the same inventive principle, in order to achieve the third inventive object mentioned above, the present invention provides a copper-aluminum composite tube, which is rolled into a copper-aluminum composite tube from a copper-aluminum composite strip with a width of 30mm-100mm and a thickness of 0.5mm-8mm;

[0027] forming a high-frequency welding interface in the gap of the copper-aluminum composite tube;

[0028] The copper-aluminum composite tube comprises a copper layer and an aluminum layer, wherein the aluminum layer is an inner layer;

[0029] A defective portion with a triangular cross section is provided at the high-frequency welding interface.

[0030] Preferably, both sides of the aluminum layer of the copper-aluminum composite strip have symmetrical first chamfers and second chamfers.

[0031] Preferably, the angles of the first chamfer and the second chamfer are respectively 10° to 75°.

[0032] Based on the same inventive principle, in order to achieve the fourth inventive object mentioned above, the present invention provides a use, in which the copper-aluminum composite tube described in the third invention is used for cooling.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] (1) The present invention develops a production device for a narrow copper-aluminum composite strip, wherein the feed end of the narrow copper-aluminum composite strip is limited by a first pressure roller assembly and a first guide roller assembly, wherein the first pressure roller assembly is used to press the copper-aluminum composite strip, and the first guide roller assembly is used to limit both sides of the copper-aluminum composite strip, so that the upper and lower surfaces and both sides of the feed end of the copper-aluminum composite strip are all limited; the discharge end of the narrow copper-aluminum composite strip is limited by a second guide roller assembly and a second pressure roller assembly, wherein the second pressure roller assembly is used to press the copper-aluminum composite strip, and the second guide roller assembly is used to limit both sides of the copper-aluminum composite strip, so that the upper and lower surfaces and both sides of the discharge end of the copper-aluminum composite strip are all limited; a first conical knife and a second conical knife are provided between the feed end and the discharge end of the copper-aluminum composite strip. Conical knife, the first conical knife chamfers the first top angle of the copper-aluminum composite strip to form a first chamfer, the second conical knife chamfers the second top angle of the copper-aluminum composite strip to form a second chamfer, when the feed end and the discharge end of the copper-aluminum composite strip are constrained, the first chamfer and the second chamfer are synchronously formed on both sides of the copper-aluminum composite strip, and the chamfering precision is high; on the one hand, by using the first conical knife and the second conical knife with different tapers, the first chamfer and the second chamfer of different angles can be formed, and on the second hand, when the first conical knife and the second conical knife with the same taper are used, by adjusting the height of the first conical knife and the second conical knife, the first chamfer and the second chamfer of different cutting depths can be achieved, and the chamfering efficiency is high and the flexibility is high.

[0035] (2) The copper-aluminum composite material having the first chamfer and the second chamfer is rolled into a copper-aluminum composite tube with the aluminum layer as the inner layer. The copper-aluminum composite tube will form a gap to be welded. Due to the existence of the first chamfer and the second chamfer, the first chamfer and the second chamfer form a defect portion with a triangular cross-section. The existence of the defect makes the gap tightly connected, and a tight weld can be formed after high-frequency welding. If there is no defect, the copper-aluminum composite material will cause excess material accumulation due to the difference in inner and outer circumferences when the tube is formed, so that the weld cannot be tightly connected, thereby affecting the welding. The defect avoids the accumulation of excess material at the weld, which provides a basis for the smooth progress of high-frequency welding.

[0036] (3) The wall thickness of the copper-aluminum composite tube is 0.5mm-8mm, and the thickness of the aluminum layer accounts for 50%-70% of the thickness of the copper-aluminum composite material. The copper-aluminum composite tube is used to replace the traditional copper tube. Under the condition of equivalent heat transfer efficiency, the material cost is greatly reduced, the weight is also greatly reduced, and the corrosion resistance and thermal conductivity also reach the performance of copper. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a side view schematic diagram of a production device for a narrow-width copper-aluminum composite strip of the present invention.

[0038] Figure 2 It is a schematic top view of a production device for a narrow-width copper-aluminum composite strip of the present invention.

[0039] Figure 3 It is a cross-sectional view of the copper-aluminum composite strip before chamfering of the present invention.

[0040] Figure 4 It is a cross-sectional view of the copper-aluminum composite strip after chamfering of the present invention.

[0041] Figure 5 It is a cross-sectional view of the copper-aluminum composite tube of the present invention.

[0042] Figure 6 It is the principle diagram of the height fine adjustment mechanism of the present invention.

[0043] Figure 7 The present invention discloses a flow chart of a production process of a copper-aluminum composite tube.

[0044] Among them, 1. the first pressure roller assembly; 11. the first upper roller; 12. the first lower roller; 2. the first guide roller assembly; 21. the first guide roller; 22. the second guide roller; 3. the first chamfering assembly; 31. the first rotating knife shaft; 32. the first conical knife; 33. the bracket; 34. the straight teeth; 35. the first teeth; 36. the second teeth; 4. the second chamfering assembly; 41. the second rotating knife shaft; 42. the second conical knife; 5. the second guide roller assembly; 51. the third guide roller; 52. the fourth guide roller; 6. the second pressure roller assembly; 61. the second upper roller; 62. the second lower roller; 7. the copper-aluminum composite strip; 71. the aluminum surface; 72. the first vertex; 721. the first chamfer; 73. the second vertex; 731. the second chamfer; 74. the copper layer; 75. the aluminum layer; 8. the defective part; 9. the high-frequency welding interface. DETAILED DESCRIPTION

[0045] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thick", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0047] Embodiment 1

[0048] Ginseng Figures 1 to 4 As shown, this embodiment discloses a specific implementation method of a production device for a narrow-width copper-aluminum composite strip (hereinafter referred to as "production device").

[0049] A production device for narrow copper-aluminum composite strip, Figures 1 to 4As shown, it includes a first pressing roller assembly 1, a first guide roller assembly 2, a first chamfering assembly 3, a second chamfering assembly 4, a second guide roller assembly 5 and a second pressing roller assembly 6; a copper-aluminum composite strip 7 with a width of 30mm-100mm and a thickness of 0.5mm-8mm passes through the first pressing roller assembly 1, the first guide roller assembly 2, the first chamfering assembly 3, the second chamfering assembly 4, the second guide roller assembly 5 and the second pressing roller assembly 6 in sequence with the aluminum surface 71 facing upward, the copper-aluminum composite material 7 includes a copper layer 74 and an aluminum layer 75, the thickness of the aluminum layer 75 accounts for 50%-70% of the thickness of the copper-aluminum composite material, and the copper-aluminum composite material 7 is mainly aluminum in volume, which has an economic advantage; the first pressing roller assembly 1 includes a first upper roller 11 and a first lower roller 12, and the copper-aluminum composite strip 7 penetrates between the first upper roller 11 and the first lower roller 12; A guide roller assembly 2 includes a first guide roller 21 and a second guide roller 22, and the two sides of the copper-aluminum composite strip 7 are limited by the first guide roller 21 and the second guide roller 22; the first chamfering assembly 3 includes a first rotating knife shaft 31 and a first conical knife 32, and the conical surface of the first conical knife 32 chamfers the first vertex 72 of the copper-aluminum composite strip 7; the second chamfering assembly 4 includes a second rotating knife shaft 41 and a second conical knife 42, and the conical surface of the second conical knife 42 chamfers the second vertex 73 of the copper-aluminum composite strip 7; the second guide roller assembly 5 includes a third guide roller 51 and a fourth guide roller 52, and the two sides of the copper-aluminum composite strip 7 are limited by the third guide roller 51 and the fourth guide roller 52; the second pressure roller assembly 6 includes a second upper roller 61 and a second lower roller 62, and the copper-aluminum composite strip 7 passes through between the second upper roller 61 and the second lower roller 62.

[0050] Specifically, the purpose of this embodiment is to roll the chamfered copper-aluminum composite strip 7 into a copper-aluminum composite tube. When the copper-aluminum composite tube is formed, due to the inconsistency of the inner and outer circumferences, if chamfering is not performed, excess material will be formed at the butt joint gap of the copper-aluminum composite tube. The chamfering of this embodiment is equivalent to cutting off the excess material in advance, which provides a basis for the forming and gap welding of the copper-aluminum composite tube. This embodiment develops a production device for a narrow copper-aluminum composite strip. The copper-aluminum composite strip 7 is Figure 1The narrow copper-aluminum composite strip 7 is unwound in the direction of the arrow shown, and the feed end of the narrow copper-aluminum composite strip 7 is limited by the first pressing roller assembly 1 and the first guide roller assembly 2, wherein the first pressing roller assembly 1 is used to press the copper-aluminum composite strip 7, that is, the feed end of the copper-aluminum composite strip 7 passes between the first upper roller 11 and the first lower roller 12, and the height direction of the copper-aluminum composite strip 7 is limited by the first upper roller 11 and the first lower roller 12, and the first guide roller assembly 2 is used to limit the two sides of the copper-aluminum composite strip 7, that is, the two sides of the feed end of the copper-aluminum composite strip 7 are limited by the first guide roller 21 and the second guide roller 22 respectively, so that the left and right directions of the copper-aluminum composite strip 7 are limited by the first guide roller 21 and the second guide roller 22, and the upper and lower sides and two sides of the feed end of the copper-aluminum composite strip 7 are all limited; the narrow copper-aluminum composite strip 7 The discharge end of the copper-aluminum composite strip 7 is limited by the second guide roller assembly 5 and the second pressure roller assembly 6, wherein the second guide roller assembly 5 is used to limit the two sides of the copper-aluminum composite strip 7, that is, the two sides of the feed end of the copper-aluminum composite strip 7 are respectively limited by the third guide roller 51 and the fourth guide roller 52, so that the left and right directions of the copper-aluminum composite strip 7 are limited by the third guide roller 51 and the fourth guide roller 52, and the second pressure roller assembly 6 is used to press the copper-aluminum composite strip 7, that is, the feed end of the copper-aluminum composite strip 7 passes through between the second upper roller 61 and the second lower roller 62, and the height direction of the copper-aluminum composite strip 7 is limited by the second upper roller 61 and the second lower roller 62, and the upper and lower surfaces and two side surfaces of the discharge end of the copper-aluminum composite strip 7 are all limited; a first conical knife 32 and a The second conical knife 43, the number of blades of the first conical knife 32 and the second conical knife 42 is 3-6, the first conical knife 32 is driven by the first rotating knife shaft 31, the first rotating knife shaft 31 is driven by the first motor, the first conical knife 32 chamfers the first vertex 72 of the copper-aluminum composite strip 7 and forms a first chamfer 721, the second conical knife 42 is driven by the second rotating knife shaft 41, the second rotating knife shaft 41 is driven by the second motor, the second conical knife 42 chamfers the second vertex 73 of the copper-aluminum composite strip 7 and forms a second chamfer 731, when the feeding end and the discharging end of the copper-aluminum composite strip 7 are constrained and there is no fluctuation, the first chamfer 721 and the second chamfer 731 are synchronously formed on both sides of the copper-aluminum composite strip 7 to form a chamfer The precision is high; on the one hand, by using the first conical surface tool 32 and the second conical surface tool 42 with different tapers, the first chamfer 721 and the second chamfer 731 with different angles can be formed. On the second hand, when the first conical surface tool 32 and the second conical surface tool 42 with the same taper are used, by adjusting the height of the first conical surface tool 32 and the second conical surface tool 42, the first chamfer 721 and the second chamfer 731 with different cutting depths can be achieved, and the chamfering efficiency is high and the flexibility is high; when adjusting the cutting depth of the first chamfer 721 and the second chamfer 731, it should be noted that the chamfer of the first vertex 72 and the chamfer of the second vertex 73 are both located in the aluminum layer 75, and the cutting depth of the first chamfer 721 and the second chamfer 731 is based on the premise of not damaging the copper layer 74.It should be noted that the front-to-back distance between the first conical knife 32 and the second conical knife 43 does not exceed 10 cm, the purpose of which is to prevent the first conical knife 32 and the second conical knife 43 from generating a large moment of cutting force on the copper-aluminum composite strip 7 to ensure chamfering accuracy.

[0051] See also Figure 4 , the chamfering angle of the first vertex 721 is 10° to 75°, and the chamfering angle of the second vertex 731 is 10° to 75°. When the first conical cutter 32 and the second conical cutter 42 with the same taper are used, in order to fine-tune the cutting depth of the first chamfer 721 and the second chamfer 731, a height fine-tuning mechanism is provided in the first chamfering assembly 3 and the second chamfering assembly 4, respectively. The first chamfering assembly 3 is taken as an example for explanation, see Figure 6 The height fine-adjustment mechanism includes a bracket 33, a straight tooth 34, a first tooth 35 and a second tooth 36. The straight tooth 34 is movably mounted on the bracket 33, the first tooth 35 and the second tooth 36 are mounted on the bracket 33, and the first motor is fixedly mounted on the bottom end of the straight tooth 34. The diameter of the first tooth 35 is much smaller than the diameter of the second tooth 36. The first tooth 35 meshes with the second tooth 36, and the second tooth 36 meshes with the straight tooth 34. When adjusting the height of the first conical cutter 32, the first tooth 35 is screwed to fine-tune the height of the straight tooth 34, thereby adjusting the cutting depth of the first conical cutter 32.

[0052] Embodiment 2

[0053] Ginseng Figure 5 As shown, this embodiment discloses a specific implementation method of a production process of a copper-aluminum composite tube.

[0054] A production process of copper-aluminum composite pipe, Figure 7 As shown, the following steps are included:

[0055] Step S1: Use a narrow copper-aluminum composite strip production device as described in Example 1 to prepare a copper-aluminum composite material with symmetrical first chamfers and second chamfers on both sides of the aluminum layer; specifically, Example 1 solves the problem of inconsistent inner and outer circumferences faced by the copper-aluminum composite material when it is rolled into a composite tube, which easily leads to accumulation of excess material and affects the quality and precision of the weld. The first chamfer 721 and the second chamfer 731 of the copper-aluminum composite material provide a basis for the forming and gap welding of the copper-aluminum composite tube.

[0056] Step S2: the copper-aluminum composite material is rolled into a copper-aluminum composite tube with the aluminum layer as the inner layer, and the first chamfer and the second chamfer form a defect portion with a triangular cross-section; specifically, the portions of the first chamfer 721 and the second chamfer 731 that are cut off in advance form a defect portion 8, and when the copper-aluminum composite material is rolled into a copper-aluminum composite tube, the weld cannot be properly connected due to the different inner and outer circumferences, and the defect of excess material accumulation is avoided.

[0057] Step S3: welding the gap of the copper-aluminum composite pipe by a high-frequency welding process to form a copper-aluminum composite pipe. Specifically, step S2 forms a closely butted gap to be welded, and the gap of the copper-aluminum composite pipe is welded by a high-frequency welding process to form a high-frequency welding interface at the gap. The high-frequency welding interface is flat, has high welding strength, and has no excess material accumulation, so that the copper-aluminum composite pipe is efficiently formed.

[0058] The wall thickness of the copper-aluminum composite tube prepared in this embodiment is 0.5mm-8mm, and the thickness of the aluminum layer accounts for 50%-70% of the thickness of the copper-aluminum composite material. By replacing the traditional copper tube with the copper-aluminum composite tube, the material cost is greatly reduced, the weight is greatly reduced, and the corrosion resistance is also comparable while the heat transfer efficiency is comparable.

[0059] Step S1 of the second embodiment is implemented by using a production device for a narrow copper-aluminum composite strip described in the first embodiment. The technical solutions of this embodiment and the first embodiment have the same parts, so please refer to the description of the first embodiment and will not be repeated here.

[0060] Embodiment 3

[0061] Ginseng Figure 7 As shown, this embodiment discloses a specific implementation of a copper-aluminum composite tube.

[0062] A copper-aluminum composite tube, Figure 5 As shown, a copper-aluminum composite tube is rolled from a copper-aluminum composite strip with a width of 30mm-100mm and a thickness of 0.5mm-8mm; a high-frequency welding interface 9 is formed in the gap of the copper-aluminum composite tube; the copper-aluminum composite tube includes a copper layer 74 and an aluminum layer 75, and the aluminum layer 75 is an inner layer; a defect portion 8 with a triangular cross-section is provided at the high-frequency welding interface 9.

[0063] Specifically, the aluminum layer 75 of the copper-aluminum composite strip has a symmetrical first chamfer 721 and a second chamfer 731 on both sides, and the angles of the first chamfer 721 and the second chamfer 731 are 10° to 75°, respectively. The parts of the first chamfer 721 and the second chamfer 731 that are cut off in advance form a defective portion 8. When the copper-aluminum composite material is rolled into a copper-aluminum composite tube, the weld cannot be properly docked due to the different inner and outer circumferences, and the defect of excess material accumulation is avoided. The gap of the copper-aluminum composite tube is welded by a high-frequency welding process to form a high-frequency welding interface 9 at the gap. The high-frequency welding interface 9 is flat, has a high welding strength, and has no excess material accumulation, so that the copper-aluminum composite tube is efficiently formed.

[0064] The wall thickness of the copper-aluminum composite tube prepared in this embodiment is 0.5mm-8mm, and the thickness of the aluminum layer accounts for 50%-70% of the thickness of the copper-aluminum composite material. By replacing the traditional copper tube with the copper-aluminum composite tube, the material cost is greatly reduced, the weight is greatly reduced, and the corrosion resistance is also comparable while the heat transfer efficiency is comparable.

[0065] The copper-aluminum composite tube described in Example 3 is prepared by adopting the production process of a copper-aluminum composite tube described in Example 2. This embodiment has the same technical solutions as Example 2, so please refer to Example 2 and will not be repeated here.

[0066] Embodiment 4

[0067] The present embodiment provides a use. The copper-aluminum composite tube described in Embodiment 3 is used for cooling, such as an air conditioning cooling tube. The wall thickness of the copper-aluminum composite tube is 0.5mm-8mm, and the thickness of the aluminum layer accounts for 50%-70% of the thickness of the copper-aluminum composite material. The copper-aluminum composite tube is used to replace the traditional copper tube. Under the condition of equivalent heat transfer efficiency, the material cost is greatly reduced, the weight is also greatly reduced, and the corrosion resistance is also equivalent.

[0068] The purpose described in the fourth embodiment has the same technical solution as that in the third embodiment, please refer to the description of the third embodiment, and no further description will be given here.

Claims

1. A production device for narrow copper-aluminum composite strips, It is characterized in that It includes a first pressing roller assembly, a first guide roller assembly, a first chamfering assembly, a second chamfering assembly, a second guide roller assembly and a second pressing roller assembly; A copper-aluminum composite strip with a width of 30 mm to 100 mm and a thickness of 0.5 mm to 8 mm passes through the first pressing roller assembly, the first guide roller assembly, the first chamfering assembly, the second chamfering assembly, the second guide roller assembly and the second pressing roller assembly in sequence with the aluminum surface facing upward; The first pressing roller assembly comprises a first upper roller and a first lower roller, and the copper-aluminum composite strip is inserted between the first upper roller and the first lower roller; The first guide roller assembly comprises a first guide roller and a second guide roller, and both sides of the copper-aluminum composite strip are limited by the first guide roller and the second guide roller; The first chamfering assembly includes a first rotating knife shaft and a first conical knife, and the conical surface of the first conical knife is used to chamfer the first vertex angle of the copper-aluminum composite strip; The second chamfering assembly includes a second rotating knife shaft and a second conical knife, and the conical surface of the second conical knife is used to chamfer the second vertex angle of the copper-aluminum composite strip; The second guide roller assembly comprises a third guide roller and a fourth guide roller, and both sides of the copper-aluminum composite strip are limited by the third guide roller and the fourth guide roller; The second pressing roller assembly includes a second upper roller and a second lower roller, and the copper-aluminum composite strip passes through between the second upper roller and the second lower roller.

2. A production device for a narrow copper-aluminum composite strip as claimed in claim 1, It is characterized in that The chamfer angle of the first vertex is 10° to 75°, and the chamfer angle of the second vertex is 10° to 75°.

3. A production device for a narrow copper-aluminum composite strip as claimed in claim 2, It is characterized in that The copper-aluminum composite material comprises a copper layer and an aluminum layer, and the thickness of the aluminum layer accounts for 50%-70% of the thickness of the copper-aluminum composite material.

4. A production device for a narrow copper-aluminum composite strip as claimed in claim 3, It is characterized in that The chamfer of the first top corner and the chamfer of the second top corner are both located in the aluminum layer.

5. A production device for a narrow copper-aluminum composite strip as described in any one of claims 1 to 4, It is characterized in that The front-to-back distance between the first conical knife and the second conical knife does not exceed 10 cm; The number of cutting edges of the first conical surface knife and the second conical surface knife is 3-6.

6. A production process for copper-aluminum composite pipes, It is characterized in that The following steps are involved: A copper-aluminum composite material having symmetrical first chamfers and second chamfers on both sides of an aluminum layer is prepared by using a production device for a narrow copper-aluminum composite strip as described in any one of claims 1 to 5; The copper-aluminum composite material is rolled into a copper-aluminum composite tube with the aluminum layer as the inner layer, and the first chamfer and the second chamfer form a defect portion with a triangular cross section; The gaps of the copper-aluminum composite pipe are welded by high-frequency welding process to form a copper-aluminum composite pipe.

7. A copper-aluminum composite tube, It is characterized in that The copper-aluminum composite strip with a width of 30mm-100mm and a thickness of 0.5mm-8mm is rolled into a copper-aluminum composite tube; forming a high-frequency welding interface in the gap of the copper-aluminum composite tube; The copper-aluminum composite tube comprises a copper layer and an aluminum layer, wherein the aluminum layer is an inner layer; A defective portion with a triangular cross section is provided at the high-frequency welding interface.

8. The copper-aluminum composite tube according to claim 1, It is characterized in that The aluminum layer of the copper-aluminum composite strip has symmetrical first chamfers and second chamfers on both sides.

9. A copper-aluminum composite tube as claimed in claim 8, It is characterized in that The angles of the first chamfer and the second chamfer are respectively 10° to 75°.

10. The copper-aluminum composite tube according to any one of claims 7 to 9 is used for cooling.

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