Ultrasonic rolling welding micro-channel composite plate forming device

Abstract

The invention belongs to the field of micro-channel forming, and particularly discloses an ultrasonic rolling welding micro-channel composite board forming device which comprises a feeding unit, a laser heating unit, a press machine and an ultrasonic rolling unit, the feeding unit is used for providing to-be-formed foil for the ultrasonic rolling unit, and the to-be-formed foil comprises a first foil and a second foil which are stacked; the laser heating unit is arranged on the feeding unit and used for heating the foil to be formed before the foil is fed into the ultrasonic rolling unit so as to increase the temperature of the foil; the ultrasonic rolling unit is used for conducting ultrasonic rolling on the to-be-formed foil, so that the first foil and the second foil are welded while the micro-channel is formed, and the ultrasonic rolling unit is further connected with a press machine to achieve adjustment of rolling pressure. Through the synergistic effect of ultrasonic vibration, laser heating and rolling plastic forming, micro-channel forming and composite plate welding can be conducted synchronously.

Description

Technical Field

[0001] This application belongs to the field of microchannel forming, and more specifically, relates to an ultrasonic rolling welding microchannel composite plate forming device. Background Art

[0002] Microchannel structures are widely used in fields such as radiators, fuel cell bipolar plates, and biochips. Traditional processing methods (such as chemical etching, laser processing, and micro-milling) require multiple steps to complete microchannel forming and composite plate welding, suffering from problems such as low efficiency, high cost, and insufficient interfacial bonding strength between dissimilar materials. In addition, mechanical forming methods (such as rolling and stamping) are difficult to achieve both micron-level channel accuracy and metallurgical bonding between dissimilar materials in a single processing. When welding dissimilar metal composite plates, due to differences in the thermal expansion coefficients and melting points of the materials, problems such as interfacial cracks and oxide layer barriers are likely to occur. Summary of the Invention

[0003] Aiming at the defects of the prior art, this application provides an ultrasonic rolling welding microchannel composite plate forming device, aiming to solve the problems that traditional processing methods need to complete microchannel forming and composite plate welding step by step, with low processing efficiency and poor welding effect.

[0004] An ultrasonic rolling welding microchannel composite plate forming device provided by this application specifically includes a feeding unit, a laser heating unit, a press, and an ultrasonic rolling unit. Among them, the feeding unit is used to provide the to-be-formed foil to the ultrasonic rolling unit, and the to-be-formed foil includes a stacked first foil and a second foil; the laser heating unit is arranged on the feeding unit and is used to heat the to-be-formed foil before it is sent into the ultrasonic rolling unit to increase its temperature; the ultrasonic rolling unit is used to perform ultrasonic rolling on the to-be-formed foil, thereby forming a microchannel while welding the first foil and the second foil, and this ultrasonic rolling unit is also connected to a press to realize the adjustment of the rolling pressure.

[0005] Through the above technical solution conceived by this application, compared with the prior art, this application can realize the synchronous progress of microchannel forming and composite plate welding through the synergistic effect of ultrasonic vibration, laser heating, and rolling plastic forming, and solve the problems of long welding cycle and insufficient bonding strength of dissimilar metal composite plates.

[0006] As a further preference, the ultrasonic rolling unit includes a first roller, a second roller, two groups of fixing components, and two groups of ultrasonic components, where: the first roller is connected to one end of the press through a fixing component, the second roller is connected to the other end of the press through another fixing component, and the surfaces of the first roller and the second roller both have a toothed structure; the two groups of ultrasonic components are respectively connected to the first roller and the second roller and are used to provide ultrasonic vibration for the first roller and the second roller.

[0007] More preferably, the cross-sectional shape of the toothed structures of the first roller and the second roller is U-shaped, V-shaped or rectangular.

[0008] More preferably, each group of the ultrasonic assemblies includes an ultrasonic transducer, a conductive slip ring and an ultrasonic horn. One end of the ultrasonic transducer is connected to a power supply through the conductive slip ring, and the other end thereof is connected to the first roller or the second roller through the ultrasonic horn, so as to transmit ultrasonic waves to the first roller or the second roller through the ultrasonic horn, and make the first roller or the second roller vibrate radially.

[0009] More preferably, each group of the fixing assemblies includes a load-bearing plate, a fixing flange and a bearing. One end of the load-bearing plate is connected to a press, and the center of the other end is provided with an opening and is connected to the ultrasonic horn through the bearing and the fixing flange.

[0010] More preferably, the press includes a frame, a workbench, a slider and a cushion block arranged between the frames. The slider is connected to the cushion block and is arranged opposite to the workbench. The cushion block is connected to the first roller through the fixing assembly, and the workbench is connected to the second roller through the fixing assembly. During operation, the slider drives the cushion block to move up and down to adjust the pressure of the ultrasonic rolling unit.

[0011] More preferably, the feeding unit includes a driver and a roller group. The driver clamps and drives a to-be-formed foil to move to realize automatic feeding; the roller group is arranged behind the laser heating unit along the moving direction of the to-be-formed foil.

[0012] More preferably, the laser heating unit includes two lasers symmetrically arranged on both sides of the to-be-formed foil. The distance between the outlet of the laser and the to-be-formed foil in the vertical direction is R + 10 mm to R + 50 mm, where R is the radius of the first roller.

[0013] More preferably, the ultrasonic power of the ultrasonic rolling unit is 500 W to 2000 W, the laser power of the laser heating unit is 500 W to 2000 W, and the feeding rate of the feeding unit is 0.5 mm / s to 2 mm / s.

[0014] Generally speaking, compared with the prior art, the above technical solution conceived by the present application mainly has the following technical advantages: 1. This application stacks the first foil and the second foil, and through the synergistic effect of ultrasonic vibration, laser heating and roll-forming, realizes the simultaneous formation of microchannels and the welding of composite plates. Among them, the ultrasonic rolling unit can utilize the ultrasonic cavitation effect to remove the surface contamination layer of dissimilar foils, and while forming microchannels on the foil surface, ultrasonically weld the two foils. The laser heating unit can increase the temperature of the foil, soften the foil and promote the diffusion of interface atoms, which is beneficial to the formation of microchannels and the promotion of the connection of the interfaces of dissimilar foils, thus effectively solving the problems of long welding cycle and insufficient bonding strength of dissimilar metal composite plates; 2. In particular, by optimizing the ultrasonic power, laser power and the feeding rate of the feeding unit, this application can keep the foil to be formed within a suitable temperature range, avoiding serious heat loss or insecure welding. Description of the Drawings

[0015] Figure 1 is the front view of the ultrasonic rolling welding microchannel composite plate forming device provided by the embodiment of this application without a driver; Figure 2 is a partial side view of the ultrasonic rolling welding microchannel composite plate forming device provided by the embodiment of this application; Figure 3 is a schematic diagram of the fixing component in the ultrasonic rolling welding microchannel composite plate forming device provided by the embodiment of this application.

[0016] In all the drawings, the same reference numerals are used to represent the same elements or structures, where: 1 - Press, 2 - Slide block, 3 - Cushion block, 4 - Workbench, 5 - Ultrasonic transducer, 6 - Ultrasonic horn, 7 - Fixing component, 71 - Fixed flange, 72 - Bearing, 73 - Load-bearing plate, 8 - First roller, 9 - Conductive slip ring, 10 - Second roller, 11 - First foil, 12 - Second foil, 13 - Laser, 14 - Driver, 15 - Guide wheel set. Detailed Embodiments

[0017] In order to make the purpose, technical solutions and advantages of this application clearer, the following further details this application in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain this application and are not used to limit this application.

[0018] As Figure 1 shown, this application provides an ultrasonic rolling welding microchannel composite plate forming device, which specifically includes a feeding unit, a laser heating unit, a press and an ultrasonic rolling unit, where: The feeding unit is used to provide the to-be-formed foil to the ultrasonic rolling unit. The to-be-formed foil includes a stacked first foil 11 and second foil 12. The first foil 11 and the second foil 12 are made of the same material or different materials. When different materials are selected, the elongation difference between the first foil 11 and the second foil 12 is within 10%, and the coefficient of thermal expansion difference is within 30%, so as to ensure that their deformations are close and the bonding property is good. The laser heating unit is arranged on the feeding unit and is used to heat the to-be-formed foil before it is fed into the ultrasonic rolling unit to increase its temperature, soften the foil and promote the diffusion of interfacial atoms, so as to facilitate the subsequent welding of the first foil 11 and the second foil 12. The press 1 is connected to the ultrasonic rolling unit and is used to adjust the rolling pressure of the ultrasonic rolling unit. The ultrasonic rolling unit is used to perform ultrasonic rolling on the to-be-formed foil, so as to weld the first foil 11 and the second foil 12 while forming a microchannel. Among them, the surface contamination layer of dissimilar materials is removed through the ultrasonic cavitation effect, and the flow stress is reduced through ultrasonic vibration to achieve a high filling rate of the microchannel.

[0019] In this application, the first foil and the second foil are stacked, and through the synergistic effect of ultrasonic vibration, laser heating and rolling plastic forming, the microchannel forming and the composite plate welding are carried out synchronously. Among them, the ultrasonic rolling unit can use the ultrasonic cavitation effect to remove the surface contamination layer of dissimilar foils, and perform ultrasonic welding on the two foils while forming a microchannel on the foil surface. The laser heating unit can increase the temperature of the foil, soften the foil and promote the diffusion of interfacial atoms, which is beneficial to the microchannel forming and the promotion of the interfacial connection of dissimilar foils, thus effectively solving the problems of long welding cycle and insufficient bonding strength of dissimilar metal composite plates.

[0020] Further, the ultrasonic rolling unit includes a first roller 8, a second roller 10, two sets of fixing components 7 and two sets of ultrasonic components. Among them: the first roller 8 is connected to one end of the press 1 through a fixing component 7, and the second roller 10 is connected to the other end of the press 1 through another fixing component 7. The surfaces of the first roller 8 and the second roller 10 both have a toothed structure. During rolling, the microchannel forming and welding of the first foil 11 and the second foil 12 are realized through the combined action of the first roller 8 and the second roller 10; the two sets of ultrasonic components are respectively connected to the first roller 8 and the second roller 10 and are used to provide ultrasonic vibration for the first roller 8 and the second roller 10, and then use the ultrasonic vibration to reduce the flow stress to achieve a high filling rate of the microchannel. Preferably, the cross-sectional shape of the toothed structure of the first roller 8 and the second roller 10 is U-shaped, V-shaped or rectangular.

[0021] Preferably, each group of ultrasonic components includes an ultrasonic transducer 5, a conductive slip ring 9, and an ultrasonic horn 6. One end of the ultrasonic transducer 5 is connected to a power supply through the conductive slip ring 9, and the other end is connected to the first roller 8 or the second roller 10 through the ultrasonic horn 6, so as to transmit ultrasonic waves to the first roller 8 or the second roller 10 through the ultrasonic horn 6, causing the first roller 8 or the second roller 10 to vibrate radially.

[0022] Preferably, each group of fixing components 7 includes a load-bearing plate 73, a fixing flange 71, and a bearing 72. One end of the load-bearing plate 73 is connected to the press 1, and the other end is provided with a central hole and is connected to the ultrasonic horn 6 through the bearing 72 and the fixing flange 71.

[0023] Furthermore, the press 1 includes a frame, as well as a workbench 4, a slider 2, and a cushion block 3 arranged between the frames. The slider 2 is connected to the cushion block 3 and is arranged opposite to the workbench 4. The cushion block 3 is connected to the first roller 8 through a fixing component, and the workbench 4 is connected to the second roller 10 through a fixing component. During operation, the slider 2 drives the cushion block 3 to move up and down to adjust the downward pressure of the first roller 8, thereby adjusting the pressure of the ultrasonic rolling unit.

[0024] Furthermore, the feeding unit includes a driver 14 and a roller group 15. The driver 14 clamps the to-be-formed foil and drives it to move to achieve automatic feeding; the roller group 15 is arranged behind the laser heating unit along the moving direction of the to-be-formed foil, and is used to prevent the first foil 11 and the second foil 12 from warping.

[0025] Furthermore, the laser heating unit includes two lasers 13 symmetrically arranged on both sides of the to-be-formed foil. The distance between the outlet of the laser 13 and the to-be-formed foil in the vertical direction is R + 10 mm to R + 50 mm, where R is the radius of the first roller 8. Within this distance range, heat loss can be effectively controlled, avoiding problems such as excessive heat loss that requires increasing the laser power and causing melting and deformation of the foil surface.

[0026] Furthermore, the ultrasonic power of the ultrasonic rolling unit is 500 W to 2000 W, the laser power of the laser heating unit is 500 W to 2000 W, and the feeding rate of the feeding unit is 0.5 mm / s to 2 mm / s. Through the coordinated cooperation of the ultrasonic power, laser power, and feeding rate, it is possible to ensure that the to-be-formed foil is maintained within a suitable temperature range, avoiding serious heat loss or insecure welding.

[0027] The following further illustrates the technical solutions provided by the present application according to specific embodiments.

[0028] Embodiment 1 The first foil 11 is made of 316L stainless steel, and the second foil 12 is made of TA1 titanium alloy. Their dimensions are: width 16 mm, thickness 0.05 mm. The diameters of the first roller 8 and the second roller 10 are 100 mm, the width is 14 mm, and the cross-sectional shape of the tooth-like structure on the surface is "U" shaped, with a depth of 0.5 mm. The surfaces of the first foil 11 and the second foil 12 need to be ground, polished, and cleaned, and the surface roughness Sa ≤ 0.8 μm.

[0029] The assembly method is that the 316L stainless steel foil and the TA1 titanium alloy foil are stacked to obtain the foil to be formed. One end of the foil to be formed is clamped by the driver 14, and the feeding is controlled by the driver 14. The first roller 8 presses down by 0.5 mm. The laser irradiation position is in front of the feeding of the foil, close to the position of the first roller 8. The distance between the outlet of the laser 13 and the foil to be formed is R + 10 mm, and the laser heats the foil to be formed simultaneously.

[0030] The rolling process is that the laser heats the two foils, the ultrasonic vibration is turned on, the feeding of the foil to be formed is controlled. The ultrasonic power is 500 W, the laser power is 500 W, and the feeding rate of the feeding unit is 0.5 mm / s.

[0031] Example 2 Same as Example 1, only the ultrasonic power is 2000 W, the laser power is 2000 W, and the feeding rate of the feeding unit is 2 mm / s.

[0032] Example 3 Same as Example 1, only the ultrasonic power is 1000 W, the laser power is 1000 W, and the feeding rate of the feeding unit is 1 mm / s.

[0033] In the description of this application, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality" means two or more, unless otherwise specifically defined.

[0034] In addition, the reference to "one embodiment" throughout this specification; the appearance of the phrase "in one embodiment" and similar language means that the specific features, structures, or characteristics described in connection with that embodiment are included in at least one embodiment of this application. Thus, the appearances of the phrase "in one embodiment" and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment.

[0035] Those skilled in the art can easily understand that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An ultrasonic rolling welding micro-channel composite plate forming device, characterized in that: The invention comprises a feeding unit, a laser heating unit and an ultrasonic rolling unit, wherein the feeding unit is used to provide a foil to be formed to the ultrasonic rolling unit, and the foil to be formed comprises a first foil (11) and a second foil (12) stacked together; the laser heating unit is arranged on the feeding unit and is used to heat the foil to be formed before it is fed into the ultrasonic rolling unit to increase its temperature; the ultrasonic rolling unit is used to perform ultrasonic rolling on the foil to be formed, thereby welding the first foil (11) and the second foil (12) while forming a microchannel; the ultrasonic rolling unit is also connected to a press (1) to adjust the rolling pressure.

2. The ultrasonic rolling welding micro-channel composite plate forming device according to claim 1, characterized in that: The ultrasonic rolling unit comprises a first roller (8), a second roller (10), two groups of fixed components (7) and two groups of ultrasonic components, wherein: the first roller (8) is connected to one end of the press (1) via a fixed component (7), the second roller (10) is connected to the other end of the press (1) via another fixed component (7), and the surfaces of the first roller (8) and the second roller (10) both have a toothed structure; the two groups of ultrasonic components are respectively connected to the first roller (8) and the second roller (10) to provide ultrasonic vibration for the first roller (8) and the second roller (10).

3. The ultrasonic rolling welding micro-channel composite plate forming device according to claim 2, characterized in that: The cross-sectional shape of the toothed structures of the first roller (8) and the second roller (10) is U-shaped, V-shaped or rectangular.

4. The ultrasonic rolling welding micro-channel composite plate forming device according to claim 2, characterized in that: Each group of ultrasonic components comprises an ultrasonic transducer (5), a conductive slip ring (9) and an ultrasonic horn (6); one end of the ultrasonic transducer (5) is connected to a power source via the conductive slip ring (9), and the other end of the ultrasonic transducer (5) is connected to a first roller (8) or a second roller (10) via the ultrasonic horn (6), so as to transmit ultrasound to the first roller (8) or the second roller (10) via the ultrasonic horn (6), thereby causing the first roller (8) or the second roller (10) to vibrate in the radial direction.

5. The ultrasonic rolling welding micro-channel composite plate forming device according to claim 2, characterized in that: Each set of the fixing components (7) comprises a load-bearing plate (73), a fixing flange (71) and a bearing (72); one end of the load-bearing plate (73) is connected to the press (1), and the other end thereof has a central opening and is connected to the ultrasonic horn (6) via the bearing (72) and the fixing flange (71).

6. The ultrasonic rolling welding micro-channel composite plate forming device according to claim 2, characterized in that: The press (1) comprises a frame, a workbench (4), a slider (2) and a cushion block (3) arranged between the frames, the slider (2) being connected to the cushion block (3) and arranged opposite to the workbench (4), the cushion block (3) being connected to a first roller (8) via a fixing component (7), and the workbench (4) being connected to a second roller (10) via a fixing component (7). During operation, the cushion block (3) is driven up and down by the slider (2) to adjust the pressure of the ultrasonic rolling unit.

7. The ultrasonic rolling welding micro-channel composite plate forming device according to claim 1, characterized in that: The feeding unit comprises a driver (14) and a roller group (15); the driver (14) clamps the foil to be formed and drives it to move so as to achieve automatic feeding; the roller group (15) is arranged behind the laser heating unit along the moving direction of the foil to be formed.

8. The ultrasonic rolling welding micro-channel composite plate forming device according to claim 2, characterized in that: The laser heating unit comprises two lasers (13) symmetrically arranged on both sides of the foil to be formed, the distance between the outlet of the laser (13) and the foil to be formed in the vertical direction is R+10mm-R+50mm, and R is the radius of the first roller (8).

9. The ultrasonic rolling welding micro-channel composite plate forming device according to any one of claims 1 to 8, characterized in that: The ultrasonic power of the ultrasonic rolling unit is 500W to 2000W, the laser power of the laser heating unit is 500W to 2000W, and the feeding rate of the feeding unit is 0.5mm / s to 2mm / s.

Images