Extrusion welding device for aluminum flat pipe

Abstract

The invention discloses an extrusion welding device for an aluminum flat pipe, and belongs to the technical field of aluminum flat pipes. Comprising a welding seam straightening assembly, a guide assembly, a high-frequency coil and an extrusion wheel assembly, and the extrusion wheel assembly comprises two mounting seats, a bearing seat, an extrusion wheel shaft, an extrusion wheel, a cooling metal plate and a first soft body; a cooling liquid groove is formed in a feeding port of the scrap scraping device, and two cooling metal plates are arranged on the two installation bases correspondingly and located right behind the two extrusion wheels correspondingly. A spray hole is formed in the front side of the cooling metal plate and is connected with the cooling liquid circulating structure; the cooling liquid tank is connected with the cooling liquid circulating structure, and cooling liquid overflowing from the front end of the cooling liquid tank is between the two mounting seats; the two first soft bodies are located on the left side and the right side of the aluminum flat pipe correspondingly and located between the outer sides of the rear portions of the extrusion wheels on the corresponding sides and the installation base. The mounting seat, the extrusion wheel and the first soft body define a [-shaped structure; and cooling liquid between the two mounting seats flows out from the opening of the [-shaped structure and a gap between the extrusion wheel and the bearing seat.

Description

Technical Field

[0001] The invention belongs to the technical field of aluminum flat tube processing, and in particular relates to an extrusion welding device for aluminum flat tubes. Background Art

[0002] Aluminum alloy flat tubes are important heat dissipation components on automobile water tanks and air conditioning condensers. Aluminum alloy flat tubes have a large cross-sectional internal area, good heat transfer effect, and excellent thermal conductivity, excellent corrosion resistance, high recycling value, high surface quality, light weight, high pressure resistance, etc. Since the wall thickness of the flat tube is required to be between 0.25mm and 0.5mm. In the prior art, the flat tube can be formed into a U shape by bending an aluminum strip, and then high-frequency heating and extrusion welding are used to obtain the flat tube.

[0003] For example, the patent with application number CN201710135680.1 discloses a high-frequency welding pipe making machine, which includes an uncoiling unit, a docking unit, a storage unit, a traction unit, a regional dotting unit, a forming unit, a welding unit, a scraping unit, a shaping unit, a cutting unit and a sorting unit arranged in sequence; the uncoiling unit includes a protective frame, an aluminum strip roll fixing mechanism, a driving mechanism and a speed control mechanism, the driving mechanism is connected to the aluminum strip roll fixing mechanism, the aluminum strip roll fixing mechanism is arranged in the protective frame, the aluminum strip roll fixing mechanism and the driving mechanism are provided with at least one set, and when there are multiple sets, the axes of the two aluminum strip roll fixing mechanisms are parallel; the speed control mechanism includes a guide plate, a guide wheel I, a guide wheel II and a guide wheel III, the guide plate is arranged on the upper part of the protective frame at the discharge end, the guide wheel I and the guide wheel II are arranged at the discharge end of the guide plate, and the guide wheel III slides up and down under the guide wheel I and the guide wheel II. For example, the patent with application number CN202321947516.8 discloses an aluminum heat pipe production line, which includes: an aluminum strip coil, including a strip aluminum plate and a reel; a machine platform for installing the components required for the aluminum heat pipe production line, wherein the side and the top have wires connecting the components; an unwinding assembly, installed on one side of the top of the machine platform, for fixing the aluminum strip coil and rotating the aluminum strip coil on the top of the unwinding assembly; a rough forming assembly, installed in the middle of the top of the machine platform, for circling the strip aluminum plate of the aluminum strip coil and moving one end of the strip aluminum plate of the aluminum strip coil to a predetermined position; a conveying assembly, installed on the top of the machine platform and on one side of the unwinding assembly, for conveying one end of the strip aluminum plate of the aluminum strip coil to a predetermined position at one end of the rough forming assembly, and the conveying assembly has a traction assembly, The strip aluminum plate of the aluminum strip coil is transferred to the inner side of the rough forming component for processing through the traction component; the welding component is installed at the top of the machine and located at the other end of the rough forming component, and is used to weld the strip aluminum plate of the aluminum strip coil transferred by the rough forming component into a blank aluminum heat sink; the surface treatment component is installed at the top of the machine and located on one side of the welding component, and is used to clean the weld and surface dust of the blank aluminum heat sink; the fine forming component is installed at the top of the machine and located on one side of the surface treatment component, and is used to finely shape the treated aluminum heat sink; the speed detection component is installed at the top of the machine and located on one side of the fine forming component, and is used to detect the moving speed of the aluminum heat sink; the cutting component is installed at the top of the machine and located on one side of the speed detection component, and is used to cut the shaped aluminum heat sink according to the preset length.

[0004] From the above patents, we can see that the production of aluminum flat tubes will use extrusion welding devices and scraping devices, etc. Among them, the extrusion welding device includes a workbench and a weld straightening component, a guide component, a high-frequency coil and an extrusion wheel component arranged from front to back on it. The extrusion wheel component includes two welding units arranged side by side on the left and right. The welding unit includes a mounting seat, a bearing seat on the mounting seat, an extrusion wheel shaft on the bearing seat, and an extrusion wheel on the extrusion wheel shaft. The two mounting seats are arranged side by side on the left and right and are arranged on the workbench. The two extrusion wheels are respectively located on the left and right sides of the aluminum flat tube. A coolant channel is provided on the extrusion wheel shaft, and the coolant channel is connected to the coolant circulation structure through a pipeline.

[0005] For example, the patent with application number CN201720224484.7 discloses a pipe extrusion welding device, including a base, a guide wheel assembly and a welding wheel assembly, wherein the guide wheel assembly and the welding wheel assembly are arranged on the base in sequence; there are more than two guide wheel assemblies, each of which includes a bearing seat I, a guide wheel and a guide wheel shaft, wherein the bearing seat I is arranged on the base, and the guide wheel is rotatably connected to the top of the bearing seat I through the guide wheel shaft; the welding wheel assembly includes a bearing seat II, a welding wheel and a welding wheel shaft, wherein the welding wheel is rotatably connected to the bottom of the bearing seat II through the welding wheel shaft, and the bearing seat II is supported on the base through the column I. A cooling water channel is provided in the welding wheel shaft, which runs longitudinally through both ends of the shaft, and a rotary joint is provided at both ends of the cooling water channel for connecting the cooling water pipe. The device also includes a material guide assembly, which is arranged on a column II between the guide wheel assembly and the welding wheel assembly. The material guide assembly includes a material guide bar, a guide bar mounting seat and a height adjustment block. The material guide bar is arranged on the guide bar mounting seat, the guide bar mounting seat is arranged on the height adjustment block, and the height adjustment block is arranged on the column II.

[0006] For example, the patent application number CN201520834005.4 discloses a high-frequency welding heat dissipation aluminum tube welding extrusion device, which includes two extrusion wheels and two rotating shafts. The extrusion wheels are respectively tightly fitted on the lower part of the rotating shaft, and the upper part of the rotating shaft is provided with a bearing seat. The bearing seat is provided with a lubricant channel and an interface for lubricating the bearing. The bearing seat is provided with a bearing sleeved on the rotating shaft, and the rotating shaft is provided with a cooling water channel longitudinally running through both ends of the rotating shaft. The upper and lower ends of the rotating shaft are provided with a locking nut and a cooling water pipe.

[0007] The prior art heats the aluminum flat tube through a high-frequency coil, and the upper ends of the two arms of the aluminum flat tube (in a U shape) melt; the upper ends of the two arms of the aluminum flat tube are pressed together by the extrusion wheel to achieve welding and simultaneously achieve the forming of the aluminum flat tube. After the aluminum flat tube is heated, the temperature is relatively high, and the heat will be transferred to the extrusion wheel, which will cause the extrusion wheel to deform and affect the welding and forming accuracy; it will also affect the service life of the extrusion wheel; in the prior art, the extrusion wheel shaft and the extrusion wheel are cooled by passing coolant into the extrusion wheel shaft, and the applicant found that the cooling effect on the extrusion wheel is not good. In addition, the high temperature of the aluminum flat tube itself will also affect the accuracy of the subsequent scraping process and the service life of the scraper. Summary of the invention

[0008] In order to solve the above problems, an embodiment of the present invention provides an extrusion welding device for aluminum flat tubes, which has a good cooling effect on the extrusion wheel and the aluminum flat tube, and also realizes the cleaning of the aluminum flat tube and the extrusion wheel. The technical solution is as follows: An extrusion welding device for an aluminum flat tube according to an embodiment of the present invention includes a workbench 1, and a weld straightening assembly 2, a guiding assembly 3, a high-frequency coil 4, and an extrusion wheel assembly 5 arranged in sequence from front to back thereon. The extrusion wheel assembly 5 includes two welding units arranged side by side left and right. Each welding unit includes a mounting seat 51, a bearing seat 52 on the mounting seat 51, an extrusion wheel shaft 53 on the bearing seat 52, and an extrusion wheel 54 on the extrusion wheel shaft 53. The two mounting seats 51 are arranged side by side left and right and are provided on the workbench 1. The two extrusion wheels 54 are respectively located on the left and right sides of the aluminum flat tube 6. A coolant channel is provided on the extrusion wheel shaft 53, and the coolant channel is connected to a coolant circulation structure through a pipeline; a coolant tank 8 is provided at the feed inlet of a chip scraping device 7 behind the extrusion welding device. Each welding unit further includes a cooling metal plate 9 and a first soft body 10; the two cooling metal plates 9 are respectively located on the left and right sides of the aluminum flat tube 6, are respectively provided on the two mounting seats 51, are both arranged along the front-rear direction, and are respectively located directly behind the two extrusion wheels 54; a cooling cavity is provided in the cooling metal plate 9, and a plurality of spray holes are arranged side by side up and down on the front side thereof, and the cooling metal plate 9 is connected to the coolant circulation structure through a pipeline; the spray holes are arranged facing the rear side of the corresponding extrusion wheel 54 and are communicated with the cooling cavity; the coolant tank 8 is connected to the coolant circulation structure through a pipeline, an opening for the aluminum flat tube 6 to pass through is provided in the upper part of the front side thereof, the front end thereof is located adjacent to the rear of the mounting seat 51, and the coolant overflowing from the front end thereof reaches between the two mounting seats 51; the two first soft bodies 10 are respectively located on the left and right sides of the aluminum flat tube 6, and are located between the rear outer side of the corresponding extrusion wheel 54 and the mounting seat 51 to seal between the extrusion wheel 54 and the mounting seat 51; the mounting seat 51, the extrusion wheel 54, and the first soft body 10 enclose a backward-opening U-shaped structure; the coolant between the two mounting seats 51 flows out from the opening of the U-shaped structure and the gap between the extrusion wheel 54 and the bearing seat 52.

[0009] Wherein, the coolant circulation structure in the embodiment of the present invention is located directly below the workbench 1; a through hole is provided on the workbench 1 and below the extrusion wheel 54 and is communicated with the coolant circulation structure, and a groove 11 is provided on the workbench 1 and directly below the front end of the coolant tank 9; the groove 11 is arranged along the left-right direction, is located adjacent to the rear of the mounting seat 51, and is communicated with the coolant circulation structure.

[0010] Wherein, the coolant tank 8 in the embodiment of the present invention is a rectangular tank arranged along the front-rear direction, and its left side or right side is connected to the coolant circulation structure through a pipeline with a pump, and two second soft bodies are provided at the rear end thereof, and the coolant tank 8 is filled with coolant; the two second soft bodies are respectively located on the left and right sides of the aluminum flat tube 6, are arranged side by side left and right and are closely attached together to seal the rear end of the coolant tank 8; the aluminum flat tube 6 is immersed in the coolant between the two mounting seats 51 and in the coolant tank 8; the opening is a vertically arranged U-shaped opening.

[0011] Among them, the mounting seat 51 in the embodiment of the present invention is a rectangular block arranged along the front-to-back direction, which can be adjusted left and right on the workbench 1; the cooling metal plate 9 is arranged at the inner front part of the corresponding mounting seat 51; the bearing seat 52 is arranged at the lower part of the inner end of the front side of the corresponding mounting seat 51, which is a rectangular box structure arranged along the front-to-back direction, and its inner side is flush with the inner side of the mounting seat 51 on the corresponding side, and it is connected to the lubricating oil supply structure through a pipeline.

[0012] Among them, the cooling metal plate 9 in the embodiment of the present invention is a rectangular copper plate, and the rear part of its upper side is connected to the coolant circulation structure through a universal bamboo tube; the extrusion wheel 54 is coaxially arranged at the lower part of the extrusion wheel shaft 53 and is located adjacent to the upper part of the bearing seat 52; the extrusion wheel shaft 53 is vertically arranged on the upper side of the bearing seat 52, and it is rotatably arranged on the bearing seat 52, and its upper end is connected to the coolant circulation structure through a bamboo tube, and its lower end passes through the bearing seat 52 downward and is open; the coolant channel is coaxially arranged with the extrusion wheel shaft 53.

[0013] Among them, the high-frequency coil 4 in the embodiment of the present invention is arranged along the front-to-back direction, and is located in front of the extrusion wheel 54, and is sleeved on the outside of the aluminum flat tube 6; the guide assembly 3 includes an adjustment seat and a guide bar arranged on its upper edge in the front-to-back direction; the adjustment seat can be adjusted left and right on the workbench 1, and is located on the left or right side of the aluminum flat tube 6; the guide bar is arranged along the front-to-back direction, and is located in front of the high-frequency coil 4, and its rear end extends into the high-frequency coil 4, and it can be adjusted forward and backward and vertically on the adjustment seat, and is located between the upper ends of the two arms of the aluminum flat tube 6.

[0014] Specifically, the first soft body 10 and the second soft body in the embodiment of the present invention are both vertically arranged sponge strips; the first soft body 10 is located in front of the corresponding cooling metal plate 9, which is fixed to the inner front end of the corresponding mounting seat 51, and its lower end is fixed on the bearing seat 52.

[0015] Among them, the weld straightening assembly 2 in the embodiment of the present invention includes a front flat roller unit 21, a vertical roller unit 22 and a rear flat roller unit 23 arranged in sequence from front to back; the front flat roller unit 21 and the rear flat roller unit 23 are synchronously driven, and both include two flat rollers arranged side by side up and down and respectively located on the upper and lower sides of the aluminum flat tube 6; the vertical roller unit 22 includes two vertical rollers arranged side by side left and right and respectively located on the left and right sides of the aluminum flat tube 6, the vertical rollers are vertically arranged and the middle part thereof is coaxially provided with an annular groove matching the aluminum flat tube 6; the lower flat roller and the upper flat roller of the front flat roller unit 21 are respectively provided with a first lower groove and two first upper grooves, and the lower flat roller and The upper flat rollers are respectively provided with a second lower groove and a second upper groove, the first lower groove, the first upper groove, the second lower groove and the second upper groove are coaxially arranged with the corresponding flat rollers, the first lower groove and the second lower groove both cooperate with the lower part of the aluminum flat tube 6 and allow the lower part of the aluminum flat tube 6 to slide through, the two first upper grooves are arranged side by side on the left and right and respectively cooperate with the upper ends of the two arms of the aluminum flat tube 6, the upper ends of the two arms of the aluminum flat tube 6 are respectively slidably arranged in the two first upper grooves; the second upper groove cooperates with the upper part of the aluminum flat tube 6, and its left and right sides are respectively located on the outer sides of the corresponding sides of the upper ends of the two arms of the aluminum flat tube 6; the upper part of the aluminum flat tube 6 is slidably arranged in the second upper groove.

[0016] Specifically, the annular groove in the embodiment of the present invention is an arc-shaped groove, the first lower groove and the second lower groove are U-shaped grooves, the first upper groove and the second upper groove are annular strips, the width of the second upper groove is the same as the thickness of the aluminum flat tube 6, and the width of the first upper groove is the same as the thickness of the aluminum strip constituting the aluminum flat tube 6.

[0017] Preferably, a negative pressure pipe is provided above between the two cooling metal plates 9 in the embodiment of the present invention, and the suction port of the negative pressure pipe is arranged forward and faces the extrusion wheel 54 .

[0018] The technical solution provided by the embodiment of the present invention has the following beneficial effects: (1) The coolant in the coolant tank and the U-shaped structure realizes the cooling and cleaning of the aluminum flat tube and the extrusion wheel, and the temperature of the scraping process is less than 50°C.

[0019] (2) The cooling metal plate realizes the cooling of the coolant in the U-shaped structure, and the sprayed coolant realizes the cooling and cleaning of the extrusion wheel.

[0020] (3) The coolant flowing out from the front gap of the U-shaped structure realizes the cooling of the bearing seat and the extrusion wheel.

[0021] (4) The guide assembly has three functions: one is to guide, the second is to prevent deformation during heating (especially inward deformation), and the third is to seal the upper end of the aluminum flat tube to prevent impurities and coolant from entering.

[0022] (5) The straight weld assembly realizes the shaping and straightening of the upper ends of the two arms of the aluminum flat tube to ensure the welding effect.

[0023] (6) The negative pressure pipe absorbs the heat and dust from the extrusion wheel in time to ensure the welding effect.

[0024] (7) The processing speed of the aluminum flat tube of this patent is greater than 130m / min. Compared with the prior art, the compressive strength of the aluminum flat tube is increased by at least 15%, and the welding dimensional error of the aluminum flat tube is less than 0.02mm. Figure 5 As shown, the top of the aluminum flat tube is flat and smooth, with no visible welding marks. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the structure of the extrusion welding device of the aluminum flat tube in the embodiment of the present invention; Figure 2 It is a schematic diagram of the structure of the flat roller on the upper part of the front flat roller unit; Figure 3 It is a structural diagram of the vertical roller; Figure 4 It is a schematic diagram of the structure of the flat roller on the upper part of the rear flat roller unit; Figure 5 This is a schematic diagram of the appearance of the welding end of the aluminum flat tube prepared by this patent.

[0026] In the figure: 1 workbench, 2 weld straightening assembly, 3 guide assembly, 4 high frequency coil, 5 extrusion wheel assembly, 6 aluminum flat tube, 7 scraper device, 8 coolant tank, 9 cooling metal plate, 10 first soft body, 11 groove; 21 front flat roller unit, 22 vertical roller unit, 23 rear flat roller unit; 51 mounting seat, 52 bearing seat, 53 extrusion wheel shaft, 54 extrusion wheel. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] Example 1 See also Figure 1Embodiment 1 provides an extrusion welding device for an aluminum flat tube, which includes a workbench 1 and a weld straightening component 2, a guide component 3, a high-frequency coil 4, and an extrusion wheel component 5, etc., which are sequentially arranged on the workbench 1 from front to back. A coolant tank 8 is provided on the feed port of the scraper device 7 at the rear of the extrusion welding device. The coolant tank 8 is connected to the coolant circulation structure (outputting coolant to the coolant tank 8) through a pipeline, and an opening (specifically a vertically arranged U-shaped opening) is provided on the upper front side thereof for the aluminum flat tube 6 to pass through, and its front end is located adjacent to the rear of the mounting seat 51, and the coolant overflowing from the front end thereof flows between the two mounting seats 51. Specifically, the coolant tank 8 is a rectangular tank arranged in the front-to-back direction, and its left or right side is connected to the coolant circulation structure through a pipeline with a pump, and its rear end is provided with two second soft bodies (specifically vertically arranged sponge strips), which contain coolant. The two second soft bodies are respectively located on the left and right sides of the aluminum flat tube 6, side by side and close together (the middle part is deformed to form a groove for the aluminum flat tube 6 to pass through), and the rear end of the coolant tank 8 is closed. Among them, the weld straightening component 2 is used to guide the aluminum flat tube 6 and straighten the upper ends of the two arms of the aluminum flat tube 6 to ensure the welding effect.

[0029] The guide assembly 3 includes an adjustment seat and a guide bar arranged on its upper edge in the front-to-back direction. The adjustment seat can be adjusted left and right on the workbench 1, and is located on the left or right side of the aluminum flat tube 6. The guide bar is arranged in the front-to-back direction, and is located in front of the high-frequency coil 4. Its rear end extends into the high-frequency coil 4. It can be adjusted front-to-back and vertically on the adjustment seat. It is located between the upper ends of the two arms of the aluminum flat tube 6, and is specifically a copper bar. The guide assembly 3 has three functions: one is guiding, the second is to avoid deformation during heating, and the third is to seal the upper end of the aluminum flat tube 6 to prevent impurities and coolant from entering.

[0030] The high-frequency coil 4 is arranged along the front-to-back direction, and is located in front of and adjacent to the extrusion wheel 54 . It is sleeved outside the aluminum flat tube 6 , and can be adjusted vertically and left-right.

[0031] The extrusion wheel assembly 5 includes two welding units arranged side by side, and the two welding units are respectively located on the left and right sides of the aluminum flat tube 6. The welding unit includes a mounting seat 51, a bearing seat 52, an extrusion wheel shaft 53, an extrusion wheel 54, a cooling metal plate 9, and a first soft body 10.

[0032] Among them, two mounting seats 51 are arranged side by side on the left and right sides, and are arranged on the workbench 1. The mounting seats 51 are rectangular blocks arranged along the front-back direction, and are arranged on the workbench 1 so as to be adjustable left and right.

[0033] The two bearing seats 52 are arranged side by side. The bearing seat 52 is arranged at the lower part of the inner end of the front side of the corresponding mounting seat 51. It is a rectangular box structure arranged in the front-back direction. Its inner side is flush with the inner side of the mounting seat 51 on the corresponding side. It is connected to the lubricating oil supply structure through a pipeline.

[0034] Among them, the extrusion wheel shaft 53 is vertically arranged on the upper side of the bearing seat 52, and is rotatably arranged on the bearing seat 52. A coolant channel (which passes through the extrusion wheel shaft 53) is coaxially arranged therein, and its upper end (specifically the upper end of the coolant channel) is connected to the coolant circulation structure (for outputting coolant to the extrusion wheel shaft 53) through a bamboo tube, and its lower end passes downward through the bearing seat 52 and is open.

[0035] Among them, two extrusion wheels 54 are arranged side by side and are respectively located on the left and right sides of the aluminum flat tube 6. The extrusion wheel 54 is coaxially arranged at the lower part of the extrusion wheel shaft 53, which is located adjacent to the upper part of the bearing seat 52, and has a groove on its circumference that matches the aluminum flat tube 6, and its material is wear-resistant alloy.

[0036] Among them, two cooling metal plates 9 are respectively located on the left and right sides of the aluminum flat tube 6, with a gap between them and the corresponding sides of the aluminum flat tube 6. They are respectively arranged on two mounting seats 51, and are arranged in the front-to-back direction. They are respectively located directly behind the two extrusion wheels 54. A cooling cavity is arranged in the cooling metal plate 9, and a plurality of spray holes are arranged side by side up and down on the front side. It is arranged at the inner front part of the corresponding mounting seat 51. It is a rectangular copper plate, and the upper rear part (connected to the cooling cavity) is connected to the coolant circulation structure (outputting coolant to the cooling metal plate 9) through a universal bamboo tube. The spray hole is arranged toward the rear side of the corresponding extrusion wheel 54 and is connected to the cooling cavity.

[0037] The two first soft bodies 10 are respectively located on the left and right sides of the aluminum flat tube 6, and are located between the rear outer side of the extrusion wheel 54 on the corresponding side and the mounting seat 51 to seal the extrusion wheel 54 and the mounting seat 51. Specifically, the first soft body 10 is a vertically arranged sponge strip, which is located in front of the corresponding cooling metal plate 9, fixed to the inner front end of the corresponding mounting seat 51, and its lower end is fixed to the bearing seat 52.

[0038] The mounting seat 51, the extrusion wheel 54 and the first soft body 10 form a U-shaped structure that is open to the rear. The coolant between the two mounting seats 51 flows out from the opening of the U-shaped structure and the gap between the extrusion wheel 54 and the bearing seat 52. The aluminum flat tube 6 is immersed in the coolant between the two mounting seats 51 and the coolant in the coolant tank 8.

[0039] Among them, the coolant circulation structure (specifically including a water tank, a pump, and a filter assembly, etc.) in the embodiment of the present invention is located directly below the workbench 1. A through hole is provided on the workbench 1 and below the extrusion wheel 54 to communicate with the coolant circulation structure, and a groove 11 is provided on it and directly below the front end of the coolant tank 9. The groove 11 is arranged in the left and right directions, and is located adjacent to the rear of the mounting seat 51, and is connected to the coolant circulation structure. The coolant in the coolant tank 8 and the coolant flowing out of the U-shaped structure both flow to the groove 11.

[0040] Example 2 See also Figure 1-3 Embodiment 2 provides an extrusion welding device for an aluminum flat tube, and its structure is basically the same as that of Embodiment 1, except that: the weld straightening component 2 in the embodiment of the present invention includes a front flat roller unit 21, a vertical roller unit 22 and a rear flat roller unit 23, which are arranged in sequence from front to back.

[0041] The front flat roller unit 21 and the rear flat roller unit 23 are synchronously driven (through two synchronously driven universal couplings), and each includes two flat rollers arranged side by side and located at the upper and lower sides of the aluminum flat tube 6. The vertical roller unit 22 includes two vertical rollers arranged side by side and located at the left and right sides of the aluminum flat tube 6, respectively. The vertical rollers are arranged vertically and the middle part thereof is coaxially provided with an annular groove matched with the aluminum flat tube 6; specifically, the annular groove is an arc groove.

[0042] Among them, the lower flat roller and the upper flat roller of the front flat roller unit 21 are respectively provided with a first lower groove and two first upper grooves, and the lower flat roller and the upper flat roller of the rear flat roller unit 23 are respectively provided with a second lower groove and a second upper groove, the first lower groove, the first upper groove, the second lower groove and the second upper groove are coaxially arranged with the corresponding flat rollers, the first lower groove and the second lower groove are both matched with the lower part of the aluminum flat tube 6 and the lower part of the aluminum flat tube 6 slides through them, the two first upper grooves are arranged side by side on the left and right and respectively matched with the upper ends of the two arms of the aluminum flat tube 6, and the upper ends of the two arms of the aluminum flat tube 6 are respectively slidably arranged in the two first upper grooves. The second upper groove is matched with the upper part of the aluminum flat tube 6, and its left and right sides are respectively located on the outer sides of the corresponding sides of the upper ends of the two arms of the aluminum flat tube 6. The upper part of the aluminum flat tube 6 is slidably arranged in the second upper groove. The first lower groove and the second lower groove are U-shaped grooves, and their width is the same as the thickness of the aluminum flat tube 6 (with a small gap for easy sliding). The first upper groove and the second upper groove are annular slits, the width of the second upper groove is the same as the thickness of the aluminum flat tube 6 (with a small gap to facilitate sliding), and the width of the first upper groove is the same as the thickness of the aluminum strip constituting the aluminum flat tube 6 (with a small gap to facilitate sliding).

[0043] The results of the aluminum flat tube (made of 3003 aluminum alloy and 1069.6 mm in length) prepared by the device of this patent are as follows: Table 1

[0044] For the same specifications of commercial products, the pressure resistance of product 1 is about 5Mpa, and the pressure resistance of product 2 is 11-12Mpa. The pressure resistance improvement effect is obvious.

[0045] Example 3 Embodiment 3 provides an extrusion welding device for an aluminum flat tube, and its structure is basically the same as that of Embodiment 1, except that: a negative pressure tube is provided above the two cooling metal plates 9 in the embodiment of the present invention, and the suction port of the negative pressure tube is arranged forward and faces the extrusion wheel 54. Specifically, the negative pressure tube is an L-shaped tube arranged in the left-right direction, the inner end of which is bent forward to form a suction port, and the outer end of which is connected to the fan.

[0046] Example 4 Example 4 provides an extrusion welding device for an aluminum flat tube, and its structure is basically the same as that of Example 1, except that: the guide assembly 3 and the high-frequency coil 4 in the embodiment of the present invention are arranged on a bracket (arranged on the workbench 1) on the left side of the aluminum flat tube 6.

[0047] Among them, "first" and "second" in this patent only serve to distinguish and have no other special meanings.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Extrusion welding device for aluminum flat tubes, comprising a workbench (1) and, arranged in sequence from front to back thereon, a weld straightening assembly (2), a guiding assembly (3), a high-frequency coil (4) and an extrusion wheel assembly (5). The extrusion wheel assembly (5) includes two welding units arranged side by side left and right. Each welding unit includes a mounting seat (51), a bearing seat (52) on the mounting seat (51), an extrusion wheel shaft (53) on the bearing seat (52) and an extrusion wheel (54) on the extrusion wheel shaft (53). The two mounting seats (51) are arranged side by side left and right and are disposed on the workbench (1). The two extrusion wheels (54) are respectively located on the left and right sides of the aluminum flat tube (6). A coolant channel is provided on the extrusion wheel shaft (53), and the coolant channel is connected to a coolant circulation structure through a pipeline; characterized in that, A coolant tank (8) is provided at the feed inlet of a chip scraping device (7) behind the extrusion welding device. Each welding unit further includes a cooling metal plate (9) and a first soft body (10); the two cooling metal plates (9) are respectively located on the left and right sides of the aluminum flat tube (6), are respectively disposed on the two mounting seats (51), are arranged along the front-rear direction, and are respectively located directly behind the two extrusion wheels (54); a cooling cavity is provided in the cooling metal plate (9), a plurality of spray holes are arranged side by side up and down on the front side thereof, and the cooling metal plate (9) is connected to the coolant circulation structure through a pipeline; the spray holes are arranged towards the rear side of the corresponding extrusion wheel (54) and are communicated with the cooling cavity; the coolant tank (8) is connected to the coolant circulation structure through a pipeline, an opening for the aluminum flat tube (6) to pass through is provided in the upper part of the front side thereof, the front end thereof is located directly behind the adjacent mounting seat (51), and the coolant overflowing from the front end thereof reaches between the two mounting seats (51); the two first soft bodies (10) are respectively located on the left and right sides of the aluminum flat tube (6), and are located between the rear outer side of the corresponding extrusion wheel (54) and the mounting seat (51) to seal between the extrusion wheel (54) and the mounting seat (51); the mounting seat (51), the extrusion wheel (54) and the first soft body (10) enclose a backward-open U-shaped structure; the coolant between the two mounting seats (51) flows out from the opening of the U-shaped structure and the gap between the extrusion wheel (54) and the bearing seat (52).

2. The extrusion welding device for aluminum flat tube according to claim 1 is characterized in that: The coolant circulation structure is located directly below the workbench (1); a through hole is provided on the workbench (1) and below the extrusion wheel (54) and is communicated with the coolant circulation structure, and a groove (11) is provided thereon and directly below the front end of the coolant tank (9); the groove (11) is arranged along the left-right direction, is located directly behind the adjacent mounting seat (51), and is communicated with the coolant circulation structure.

3. The extrusion welding device for aluminum flat tube according to claim 1, characterized in that: The cooling liquid tank (8) is a rectangular tank arranged in the front-to-back direction, and its left or right side is connected to the cooling liquid circulation structure through a pipeline with a pump, and its rear end is provided with two second soft bodies, which contain cooling liquid; the two second soft bodies are respectively located on the left and right sides of the aluminum flat tube (6), and they are arranged side by side and tightly together, and they close the rear end of the cooling liquid tank (8); the aluminum flat tube (6) is immersed in the cooling liquid between the two mounting seats (51) and in the cooling liquid of the cooling liquid tank (8); the opening is a U-shaped opening arranged vertically.

4. The extrusion welding device for aluminum flat tube according to claim 1, characterized in that: The mounting seat (51) is a rectangular block arranged in the front-to-back direction, and can be adjusted left and right on the workbench (1); the cooling metal plate (9) is arranged at the inner front part of the corresponding mounting seat (51); the bearing seat (52) is arranged at the lower part of the inner end of the front side of the corresponding mounting seat (51), and is a rectangular box structure arranged in the front-to-back direction, and its inner side is flush with the inner side of the mounting seat (51) on the corresponding side, and is connected to the lubricating oil supply structure through a pipeline.

5. The extrusion welding device for aluminum flat tube according to claim 4, characterized in that: The cooling metal plate (9) is a rectangular copper plate, and its upper rear part is connected to the coolant circulation structure through a universal bamboo tube; the extrusion wheel (54) is coaxially arranged at the lower part of the extrusion wheel shaft (53) and is located adjacent to the upper part of the bearing seat (52); the extrusion wheel shaft (53) is vertically arranged on the upper side of the bearing seat (52), and is rotatably arranged on the bearing seat (52), and its upper end is connected to the coolant circulation structure through the bamboo tube, and its lower end passes through the bearing seat (52) downward and is open; the coolant channel is coaxially arranged with the extrusion wheel shaft (53).

6. The extrusion welding device for aluminum flat tube according to claim 1, characterized in that: The high-frequency coil (4) is arranged in the front-to-back direction, is located adjacent to the front of the extrusion wheel (54), and is sleeved outside the aluminum flat tube (6); the guide assembly (3) includes an adjustment seat and a guide strip arranged in the front-to-back direction on its upper edge; the adjustment seat is arranged on the workbench (1) so as to be adjustable left and right, and is located on the left or right side of the aluminum flat tube (6); the guide strip is arranged in the front-to-back direction, is located in front of the high-frequency coil (4), and its rear end extends into the high-frequency coil (4), and can be adjusted in the front-to-back direction and vertically on the adjustment seat, and is located between the upper ends of the two arms of the aluminum flat tube (6).

7. The extrusion welding device for aluminum flat tube according to claim 3, characterized in that: The first soft body (10) and the second soft body are both vertically arranged sponge strips; the first soft body (10) is located in front of the corresponding cooling metal plate (9), is fixed to the inner front end of the corresponding mounting seat (51), and its lower end is fixed to the bearing seat (52).

8. The extrusion welding device for aluminum flat tube according to claim 1, characterized in that: The weld straightening assembly (2) comprises a front flat roller unit (21), a vertical roller unit (22) and a rear flat roller unit (23) which are arranged in sequence from front to rear; the front flat roller unit (21) and the rear flat roller unit (23) are synchronously driven and each comprises two flat rollers which are arranged side by side in the upper and lower parts and are respectively located on the upper and lower sides of the aluminum flat tube (6); the vertical roller unit (22) comprises two vertical rollers which are arranged side by side in the left and right parts and are respectively located on the left and right sides of the aluminum flat tube (6); the vertical rollers are arranged vertically and the middle parts thereof are coaxially provided with an annular groove which matches the aluminum flat tube (6); the lower flat roller and the upper flat roller of the front flat roller unit (21) are respectively provided with a first lower groove and two first upper grooves, and the lower flat roller of the rear flat roller unit (23) is provided with a first lower groove and two first upper grooves. The flat rollers at the upper part are respectively provided with a second lower groove and a second upper groove. The first lower groove, the first upper groove, the second lower groove and the second upper groove are coaxially arranged with the corresponding flat rollers. The first lower groove and the second lower groove both cooperate with the lower part of the aluminum flat tube (6) and allow the lower part of the aluminum flat tube (6) to slide through. The two first upper grooves are arranged side by side on the left and right and respectively cooperate with the upper ends of the two arms of the aluminum flat tube (6). The upper ends of the two arms of the aluminum flat tube (6) are respectively slidably arranged in the two first upper grooves; the second upper groove cooperates with the upper part of the aluminum flat tube (6), and its left and right sides are respectively located on the outer sides of the corresponding sides of the upper ends of the two arms of the aluminum flat tube (6); the upper part of the aluminum flat tube (6) is slidably arranged in the second upper groove.

9. The extrusion welding device for aluminum flat tube according to claim 8, characterized in that: The annular groove is an arc-shaped groove, the first lower groove and the second lower groove are U-shaped grooves, the first upper groove and the second upper groove are annular slits, the width of the second upper groove is the same as the thickness of the aluminum flat tube (6), and the width of the first upper groove is the same as the thickness of the aluminum strip constituting the aluminum flat tube (6).

10. The extrusion welding device for aluminum flat tube according to claim 1, characterized in that: A negative pressure pipe is arranged above between the two cooling metal plates (9), and a suction port of the negative pressure pipe is arranged forward and faces the extrusion wheel (54).

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