A thin film microchannel laser welding device and a laser welding method thereof

Abstract

The application discloses a kind of film microchannel laser welding equipment and its laser welding method, which belong to film welding technical field, including laser machine, film feeding machine, film crimping fixture;Film feeding machine includes material roll, film guide wheel, one-way film feeding device, film pulling device, film supporting device, transfer device, film cutting device;Film crimping fixture first film receiving lifting device, feeding device, second film receiving turnover device, and the compression device of compression.This equipment can realize the automatic feeding, cutting and transfer of first film and second film, and also realize the automatic positioning and compression between first film, connecting pipe, second film and spacer, and can perform laser welding on first film, connecting pipe and second film to automatically produce film microchannel product, thereby improving the degree of automation of film microchannel product, improving production efficiency, reducing production cost and ensuring yield.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of thin film welding, in particular to a thin film micro-channel laser welding device and a laser welding method thereof. BACKGROUND

[0002] The patent for invention with Chinese patent number CN202011158296.1 discloses a microfluidic chip welding method, which includes a welding clamp, a laser welding head, a motion platform for controlling the movement of the laser welding head, a microfluidic chip and a light-transmitting plate placed on the welding clamp respectively. The welding method includes the following steps: coating a layer of light-blocking substance on the light-transmitting plate, removing part of the light-blocking substance by laser marking to form a light-transmitting path L2 on the light-transmitting plate consistent with the flow path L1; the welding clamp presses the microfluidic chip and the film tightly, and linear laser irradiates the light-transmitting plate, the motion platform drives the laser welding head to move, and the laser welding head releases laser energy which is absorbed by the microfluidic chip through the light-transmitting plate and converted into heat energy, so that the contact area between the microfluidic channel of the microfluidic chip and the film is melted and forms a weld, and the laser welding of the microfluidic chip and the film is completed.

[0003] Although the above-mentioned microfluidic chip welding method can press multiple films and weld multiple films by using the laser welding head, thereby producing a thin film micro-channel product, the film needs to be placed on the welding clamp manually, which is low in production efficiency and automation, high in labor cost, time-consuming and laborious, and it is difficult to realize the mutual correspondence of multiple films when placed manually, which may cause the placement position error of multiple films and lead to the deformation of the thin film micro-channel product.

[0004] Therefore, relevant technical personnel have carried out research and development, such as the patent for invention with CN202010645603.2, which discloses a device for solving the problem of irregular deformation of plastic in laser welding, which includes a plastic sample and a clamp, and an elastic light-transmitting material is arranged between the plastic sample and the clamp, covering the light-transmitting layer of the plastic sample, the thickness of the elastic light-transmitting material is 0.1-5mm, and a plurality of pressure sensors are arranged between the clamp and the elastic light-transmitting material; it also includes a pressure display system, and the pressure sensors are communicatively connected with the pressure display system.

[0005] The above-mentioned device utilizes the good permeability and heat resistance of the elastic light-transmitting material to balance the overall stress of the placed film, solves the problem of irregular deformation of the film in laser welding, and does not affect the power output of the laser itself, the pressure sensors can detect the stress condition of each point of the film and feed back the pressure value to the pressure display system, and the pressure display system detects the difference between each group of pressure values and the average pressure value; however, the film still needs to be placed manually.

[0006] Moreover, the existing thin film welding device cannot realize the automatic feeding of the thin film with a limited size.

[0007] Therefore, it is necessary to further improve. SUMMARY

[0008] The present application aims to provide a thin film micro-channel laser welding device and a laser welding method thereof to overcome the deficiencies in the prior art.

[0009] A thin film micro-channel laser welding device designed for this purpose comprises a laser machine, a thin film feeding machine located at the feeding end of the laser machine, and a thin film pressure clamping jig located at the laser working end of the laser machine.

[0010] The thin film feeding machine comprises a material roll provided with a first thin film roll and a second thin film roll, a film guide wheel for guiding the first thin film on the first thin film roll and the second thin film on the second thin film roll respectively, a one-way film feeding device for simultaneously feeding the first thin film and the second thin film in one direction, a film pulling device for simultaneously pulling out the first thin film and the second thin film, a film holding device for simultaneously holding up the first thin film and the second thin film, a transfer device for simultaneously pressure clamping and transferring the first thin film and the second thin film, and a film cutting device for simultaneously cutting the first thin film and the second thin film.

[0011] The thin film pressure clamping jig comprises a first thin film receiving and lifting device for receiving and lifting the first thin film, a feeding device for feeding a connecting pipe and a spacer, a second thin film receiving and turning device for receiving and turning the second thin film, and a pressure bonding device for pressure bonding the first thin film, the second thin film, the connecting pipe and the spacer.

[0012] The thin film feeding machine further comprises a feeding table; the material roll and the film guide wheel are sequentially arranged on the feeding table.

[0013] The one-way film feeding device is located at the film outlet end of the film guide wheel and comprises a one-way film feeding support, a deformation film feeding support and a film pressing block; the one-way film feeding support is provided with an upper film feeding roller and a lower film feeding roller arranged in rotation at upper and lower positions respectively; an eccentric shaft is arranged on the upper film feeding roller or the lower film feeding roller; the upper film feeding roller and the lower film feeding roller rely on and separate from each other through the eccentric shaft during rotation, so as to simultaneously press and release the first thin film and the second thin film passing between the upper film feeding roller and the lower film feeding roller; the deformation film feeding support is fixedly arranged on the feeding table or the one-way film feeding support and is provided with a shape and position port thereon; the film pressing block is arranged on the deformation film feeding support and is provided with a shape and position matching port thereon, the shape and position matching port and the shape and position port are matched with each other, and the first thin film and the second thin film coming out between the upper film feeding roller and the lower film feeding roller are simultaneously output in a non-flat state.

[0014] The film pulling device comprises a pneumatic clamping arm, a clamping arm support, and a film pulling driver; the film pulling driver is arranged on the film feeding table, and a film pulling driving element is arranged at the power output end of the film pulling driver; the film pulling driving element is drivingly connected with the clamping arm support; the clamping arm support reciprocally moves forward and backward on the film outlet end of the one-way film feeding device through cooperation of the film pulling driver and the film pulling driving element; the pneumatic clamping arm is arranged on the clamping arm support, and simultaneously clamps and releases the first film and the second film on the film outlet end of the one-way film feeding device.

[0015] The film supporting device comprises a film supporting fixed base, a film supporting driver, and a jacking seat; the film supporting fixed base is arranged on the film outlet end of the one-way film feeding device and is fixedly arranged on the film feeding table; the film supporting driver is arranged on the film supporting fixed base, and the power output end of the film supporting driver is drivingly connected with the jacking seat; the jacking seat is lifted and lowered on the film supporting fixed base through driving of the film supporting driver, and the jacking seat is provided with a film supporting frame for supporting the first film and the second film respectively.

[0016] The film supporting device comprises a film supporting fixed base, a film supporting driver, and a jacking seat; the film supporting fixed base is arranged on the film outlet end of the one-way film feeding device and is fixedly arranged on the film feeding table; the film supporting driver is arranged on the film supporting fixed base, and the power output end of the film supporting driver is drivingly connected with the jacking seat; the jacking seat is lifted and lowered on the film supporting fixed base through driving of the film supporting driver, and the jacking seat is provided with a film supporting frame for supporting the first film and the second film respectively.

[0017] The film supporting device comprises a film supporting fixed base, a film supporting driver, and a jacking seat; the film supporting fixed base is arranged on the film outlet end of the one-way film feeding device and is fixedly arranged on the film feeding table; the film supporting driver is arranged on the film supporting fixed base, and the power output end of the film supporting driver is drivingly connected with the jacking seat; the jacking seat is lifted and lowered on the film supporting fixed base through driving of the film supporting driver, and the jacking seat is provided with a film supporting frame for supporting the first film and the second film respectively.

[0018] The film crimping clamp further comprises an assembly base plate; the first film receiving lifting device comprises a first film receiving driver and a first film receiving seat; the first film receiving driver is arranged on the assembly base plate and is drivingly connected to the first film receiving seat at the power output end; the first film receiving seat is lifted on the assembly base plate by the driving of the first film receiving driver and is provided with a first film suction port for positioning and sucking the first film.

[0019] The feeding device comprises a feeding driver, a feeding transmission member, a feeding movable table and a material rack; the feeding driver is arranged on the assembly base plate and is drivingly connected to the feeding transmission member at the power output end, and the feeding transmission member is drivingly connected to the feeding movable table; the feeding movable table reciprocally moves on the assembly base plate towards the first film receiving lifting device by the cooperation of the feeding driver and the feeding transmission member; the material rack is fixedly arranged on the feeding movable table and is provided with a material placing position for positioning and placing the connecting pipe and the isolation member.

[0020] The second film receiving turnover device comprises a second film receiving support, a second film receiving driver, a turnover shaft and a second film receiving turnover assembly; the second film receiving support is fixedly arranged on the assembly base plate; the second film receiving driver is arranged on the second film receiving support and is drivingly connected to the turnover shaft at the power output end; the second film receiving turnover assembly is fixedly connected to the turnover shaft and is turned over on the second film receiving support by the cooperation of the turnover shaft and the second film receiving driver.

[0021] The second film receiving turnover assembly comprises a turnover support, a turnover connecting plate, a crimping plate and a second film receiving seat; the turnover support is fixedly connected to the turnover shaft; the turnover connecting plate is fixedly arranged on the turnover support; the crimping plate is located on one side of the turnover connecting plate and is drivingly connected to the pressing device; the second film receiving seat is located on the other side of the turnover connecting plate and is fixedly connected to the crimping plate; the crimping plate drives the second film receiving seat to move on the turnover connecting plate by the driving of the pressing device; the second film receiving seat is further provided with a second film suction port for positioning and sucking the second film.

[0022] The pressing device comprises a pressing support, a pressing support driver, a pressing support transmission, a pressing driver and a pressing plate. The pressing support driver is arranged on the assembly base plate and is drivingly connected with the pressing support transmission at the power output end. The pressing support transmission is drivingly connected with the pressing support. The pressing support reciprocates on the assembly base plate towards the direction of the first film receiving and lifting device through the cooperation of the pressing support driver and the pressing support transmission. The pressing driver is arranged on the pressing support and is drivingly connected with the pressing plate at the power output end. The pressing plate is lifted on the pressing support through the driving of the pressing driver.

[0023] When the pressing plate is lowered, the pressing plate and the second film receiving seat are lowered on the turnover connecting plate. When the second film receiving seat is lowered, it is supported on the first film receiving seat, so that the second film, the connecting pipe, the spacer, the first film on the first film receiving seat and the second film on the second film receiving seat are in close contact with each other.

[0024] When the pressing plate is raised, the pressing plate and the pressing plate are separated. When the pressing plate is separated from the pressing plate, the pressing plate and the second film receiving seat are reset by the elastic force of the receiving turnover elastic member, so that the second film receiving seat and the first film receiving seat are separated from each other.

[0025] The film micro-channel laser welding equipment also comprises a welding table; the film pressing clamp is arranged on the welding table; the welding table is fixedly provided with a welding frame; the laser machine is movable up and down, front and back, and / or left and right on the welding frame, and performs laser welding on the first film, the connecting pipe and the second film when moving.

[0026] A laser welding method, comprising the above-mentioned film micro-channel laser welding equipment, and the laser welding method is as follows:

[0027] I. The first film roll and the second film roll are respectively installed on two material rolls, the connecting pipe and the spacer are placed on the feeding device, and then the first film of the first film roll and the second film of the second film roll are respectively wound on the film guide wheel. The film guide wheel guides and delivers the first film and the second film towards the direction of the one-way film feeding device. At this time, the one-way film feeding device is loosened and the first film and the second film pass through.

[0028] II. The film pulling device moves towards the unidirectional film feeding device and clamps the first film and the second film, then moves away from the unidirectional film feeding device and pulls out the first film and the second film, at this time the unidirectional film feeding device outputs the first film and the second film in a non-flat state;

[0029] III. The film supporting device rises and supports the first film and the second film, and the transfer device descends and presses the first film and the second film on the film supporting device;

[0030] IV. The unidirectional film feeding device presses the first film and the second film, the film pulling device releases the first film and the second film, the film cutting device works and simultaneously cuts the first film and the second film between the unidirectional film feeding device and the film supporting device, then the transfer device sucks the first film and the second film, and the film supporting device descends;

[0031] V. The transfer device rises and moves towards the first film receiving lifting device and the second film receiving turnover device to transfer the first film and the second film above the first film receiving lifting device and the second film receiving turnover device, respectively;

[0032] VI. The first film receiving lifting device rises, and the transfer device descends, so that the first film is placed on the first film receiving lifting device and the second film is placed on the second film receiving turnover device, at this time the first film receiving lifting device positions and sucks the first film and descends, and the second film receiving turnover device positions and sucks the second film, then the transfer device returns to the initial position;

[0033] VII. The feeding device moves towards the first film receiving lifting device, so that the connecting pipe and the isolation piece are above the first film, then the second film receiving turnover device turns over, so that the second film is above the connecting pipe and the isolation piece;

[0034] VIII. The pressing device presses down and acts on the second film receiving turnover device, so that the second film on the second film receiving turnover device is attached above the connecting pipe and the isolation piece, and the connecting pipe and the isolation piece are attached above the first film;

[0035] IX. The laser machine works and laser welds the first film, the connecting pipe and the second film to make a film micro-channel product.

[0036] Compared with the prior art, the present application has the following advantages:

[0037] 1. The cooperation of two material rolls and two film guide wheels enables the first film and the second film to be automatically fed towards the unidirectional film feeding device, and the cooperation of the unidirectional film feeding device and the film pulling device enables the first film and the second film to be stably transported, so that the first film and the second film can complete the transportation requirement with a defined transportation amount and good transportation quality, providing a high-quality basis for subsequent cutting and laser welding of the first film and the second film. Then, the cooperation among the film supporting device, the transfer device and the film cutting device enables the first film and the second film to be automatically cut to a defined size, reducing unnecessary loss of the first film and the second film. Finally, the transfer device transfers the cut first film and second film towards the film crimping clamp, so that the cut first film and second film can be automatically transferred and subsequently laser welded, thereby truly realizing automatic feeding, cutting and transferring of the first film and the second film, improving the degree of automatic production of the equipment, improving production efficiency and reducing production cost.

[0038] 2. The first film supporting and lifting device and the second film supporting and overturning device are used to support and lift the first film and support and overturn the second film, respectively, and then the feeding device is used to transport the placed connecting pipe and isolation piece, so that the first film, the connecting pipe, the second film and the isolation piece can be automatically positioned and placed at a specified position, thereby avoiding a series of problems caused by manual placement, such as low production efficiency, high labor cost, time-consuming and laborious, and easy placement position error, thereby improving the degree of automatic welding of the film flow channel product. Finally, the pressing device is used to press the first film, the connecting pipe, the second film and the isolation piece, so that they are effectively in contact with each other, thereby avoiding displacement and deformation of the first film, the connecting pipe, the second film and the isolation piece during laser welding. Finally, the laser machine is used to laser weld the first film, the connecting pipe and the second film, thereby automatically manufacturing the film micro-flow channel product, which has strong practicality. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 It is an assembly structure diagram of an embodiment of the present application.

[0040] Figure 2 It is an exploded structure diagram of an embodiment of the present application.

[0041] Figure 3 It is an exploded structure diagram of a film feeding machine.

[0042] Figure 4It is a schematic diagram of the assembly structure of the feeding table, the material roll, the film guide wheel and the one-way film feeding device.

[0043] Figure 5 It is a schematic diagram of the assembly structure of the one-way film feeding device.

[0044] Figure 6 It is a schematic diagram of the exploded structure of the one-way film feeding device.

[0045] Figure 7 It is a schematic diagram of the assembly structure of the film pulling device.

[0046] Figure 8 It is a schematic diagram of the exploded structure of the film pulling device.

[0047] Figure 9 It is a schematic diagram of the assembly structure of the film holding device.

[0048] Figure 10 It is a schematic diagram of the exploded structure of the film holding device.

[0049] Figure 11 It is a schematic diagram of the assembly structure of the transfer device.

[0050] Figure 12 It is a schematic diagram of the assembly structure of the transfer device from another perspective.

[0051] Figure 13 It is a schematic diagram of the exploded structure of the transfer device.

[0052] Figure 14 It is a schematic diagram of the exploded structure of the transfer device from another perspective.

[0053] Figure 15 It is a schematic diagram of the assembly structure of the film cutting device.

[0054] Figure 16 It is a schematic diagram of the exploded structure of the film cutting device.

[0055] Figure 17 It is a schematic diagram of the exploded structure of the film pressing clamp.

[0056] Figure 18 It is a schematic diagram of the assembly structure of the first film supporting and lifting device.

[0057] Figure 19 It is a schematic diagram of the exploded structure of the first film supporting and lifting device.

[0058] Figure 20 It is a schematic diagram of the assembly structure of the feeding device.

[0059] Figure 21 It is a schematic diagram of the exploded structure of the feeding device.

[0060] Figure 22The assembly structure diagram of the second film receiving and overturning device.

[0061] Figure 23 The assembly structure diagram of the second film receiving and overturning device in the overturning working state.

[0062] Figure 24 The exploded structure diagram of the second film receiving and overturning device.

[0063] Figure 25 The exploded structure diagram of the second film receiving and overturning assembly.

[0064] Figure 26 The assembly structure diagram of the pressing device.

[0065] Figure 27 The exploded structure diagram of the pressing device. DETAILED DESCRIPTION

[0066] In order to make the above objectives, characteristics and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described herein and with modifications thereof, without departing from the scope of the present application, and it is understood that these embodiments are given for the purposes of illustration only and not for purposes of limitation.

[0067] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0068] Reference Figures 1-27 The present film micro-channel laser welding device includes a laser machine 88, a film feeding machine located at the feeding end of the laser machine 88, and a film pressing clamp located at the laser working end of the laser machine 88.

[0069] The film feeding machine includes a material roll 2 on which a first film roll and a second film roll are installed, a film guide wheel 3 that guides the first film on the first film roll and the second film on the second film roll respectively, a one-way film feeding device A that simultaneously feeds the first film and the second film in one direction, a film pulling device B that simultaneously pulls out the first film and the second film, a film holding device C that simultaneously holds up the first film and the second film, a transfer device D that simultaneously presses and transfers the first film and the second film, and a film cutting device E that simultaneously cuts the first film and the second film.

[0070] The film pressing clamp includes a first film receiving and lifting device W for receiving and lifting the first film, a feeding device X for feeding a connecting pipe and a spacer, a second film receiving and overturning device Y for receiving and overturning the second film, and a pressing device Z for pressing the first film, the second film, the connecting pipe and the spacer.

[0071] By utilizing the cooperation of two film rolls 2 and two guide rollers 3, the first and second films can be automatically fed towards the unidirectional film feeding device A. Then, by cooperating with the unidirectional film feeding device A and the film pulling device B, the first and second films can be stably conveyed, allowing them to meet the conveying requirements according to the specified conveying volume and with good conveying quality. This provides a high-quality foundation for the subsequent cutting and laser welding of the first and second films. Subsequently, by cooperating with the film supporting device C, the transfer device D, and the film cutting device E, the first and second films are automatically cut to a specified size, reducing unnecessary losses. Finally, the transfer device D transfers the cut first and second films towards the film pressing fixture, enabling the cut first and second films to be automatically transferred and subsequently laser welded. This truly realizes the automatic feeding, cutting, and transfer of the first and second films, improving the automation level of the equipment, increasing production efficiency, and reducing production costs.

[0072] The first film receiving and lifting device W and the second film receiving and flipping device Y are used to receive and lift the first film on the transfer device D and to receive and flip the second film. Then, the feeding device X is used to transport the placed connecting tube and the isolation component, so that the first film, connecting tube, second film and isolation component can be automatically positioned at the designated position. This avoids a series of problems caused by manual placement, such as low production efficiency, high labor costs, time and labor, and easy errors in placement position, thereby improving the degree of automation of film flow channel products. Finally, the pressing device Z is used to press the first film, connecting tube, second film and isolation component together to form an effective fit between the four, thereby avoiding displacement and deformation of the first film, connecting tube, second film and isolation component during laser welding. Finally, the laser machine 88 is used to laser weld the first film, connecting tube and second film to automatically produce film microflow channel products, which is highly practical.

[0073] The film feeding machine also includes a feeding platform 1; the film roll 2 and the guide roller 3 are rotatably arranged on the feeding platform 1.

[0074] In this embodiment, the feeding platform 1 is equipped with feeding rotating brackets 4 corresponding to the material roll 2 and the guide film wheel 3, respectively; the material roll 2 and the guide film wheel 3 are rotatably mounted on the feeding rotating brackets 4. The two material rolls 2 are respectively equipped with a first film roll and a second film roll. The first film on the first film roll and the second film on the second film roll are respectively wound around the guide film wheel 3 and conveyed.

[0075] The unidirectional film feeding device A is located at the film outlet end of the film guide wheel 3 and comprises a unidirectional film feeding support 5, a deformation film feeding support 9 and a film pressing block 10. The unidirectional film feeding support 5 is rotatably provided with an upper film feeding roller 6 and a lower film feeding roller 7 at upper and lower positions respectively. The upper film feeding roller 6 or the lower film feeding roller 7 is provided with an eccentric rotating shaft 8. The upper film feeding roller 6 and the lower film feeding roller 7 are in dependence on and separation from each other through the eccentric rotating shaft 8 during rotation, so as to simultaneously press and release the first film and the second film passing between the upper film feeding roller 6 and the lower film feeding roller 7.

[0076] In the embodiment, the lower film feeding roller 7 is provided with a rotating shaft and rotates on the unidirectional film feeding support 5 through the rotating shaft, and the eccentric rotating shaft 8 is arranged on the upper film feeding roller 6. The upper film feeding roller 6 rotates eccentrically on the unidirectional film feeding support 5 through the eccentric rotating shaft 8 and approaches and separates from the lower film feeding roller 7 during eccentric rotation, so as to simultaneously press and release the first film and the second film passing between the upper film feeding roller 6 and the lower film feeding roller 7.

[0077] The deformation film feeding support 9 is fixedly arranged on the film feeding table 1 or the unidirectional film feeding support 5 and is provided with a shape position opening thereon. The film pressing block 10 is arranged on the deformation film feeding support 9 and is provided with a shape position matching opening thereon. The shape position matching opening and the shape position opening are matched with each other and simultaneously output the first film and the second film in a non-flat state between the upper film feeding roller 6 and the lower film feeding roller 7.

[0078] In the embodiment, the shape position opening is a semicircular recess, and the shape position matching opening is a semicircular protrusion. The two are matched in recess and protrusion. The film coming out between the upper film feeding roller 6 and the lower film feeding roller 7 is in a flat state and enters between the shape position matching opening and the shape position opening, so that the film changes from a flat state to an arch shape. The film does not naturally sag or arch upward during conveying, thereby increasing the conveying rigidity of the film.

[0079] The film pulling device B comprises a pneumatic clamping arm 11, a clamping arm support 12 and a film pulling driver 13. The film pulling driver 13 is arranged on the film feeding table 1 and is provided with a film pulling driving part 14 at a power output end. The film pulling driving part 14 is drivingly connected with the clamping arm support 12. The clamping arm support 12 is reciprocally movable forward and backward on the film outlet end of the unidirectional film feeding device A through cooperation of the film pulling driver 13 and the film pulling driving part 14. The pneumatic clamping arm 11 is arranged on the clamping arm support 12 and simultaneously clamps and releases the first film and the second film at the film outlet end of the unidirectional film feeding device A.

[0080] The film feeding table 1 is provided with a driving part limiting support 15 and a clamping arm support guide rail 16. The film pulling driving part 14 is limitingly movable on the driving part limiting support 15. The clamping arm support 12 is provided with a clamping arm support sliding block 17 which slides on the clamping arm support guide rail 16, so as to ensure that the clamping arm support 12 can linearly slide forward and backward and improve sliding stability.

[0081] In this embodiment, the feeding table 1 corresponding to the front and rear sliding of the clamping arm support 12 is also provided with front and rear position sensors, and the clamping arm support 12 is provided with a sensing part, so as to sense the front and rear sliding position of the clamping arm support 12.

[0082] The pneumatic clamping arm 11 can clamp and pull out the first film and the second film at the film outlet end of the one-way film feeding device A during work. By cooperation of the front and rear position sensors and the sensing part, the front and rear movement distance of the pneumatic clamping arm 11 can be limited, so as to pull out the first film and the second film with a limited length.

[0083] Meanwhile, the front and rear positions of the driving part limiting support 15 can also be provided with position sensors to sense the front and rear movement positions of the film pulling driving part 14.

[0084] The film supporting device C comprises a film supporting fixed base 18, a film supporting driver 19, and a jacking seat 20. The film supporting fixed base 18 is located at the film outlet end of the one-way film feeding device A and is fixedly arranged on the feeding table 1. The film supporting fixed base 18 is provided with a jacking guide part 21. The film supporting driver 19 is arranged on the film supporting fixed base 18 and is drivingly connected with the jacking seat 20 at the power output end. The jacking seat 20 is provided with a film supporting frame 23 for supporting the first film and the second film respectively, and a jacking guide matching part 22 matched with the jacking guide part 21. The jacking seat 20 is lifted on the film supporting fixed base 18 through cooperation of the film supporting driver 19, the jacking guide part 21 and the jacking guide matching part 22, so as to ensure that the jacking seat 20 can be linearly lifted up and down and improve the lifting stability.

[0085] When the jacking seat 20 is lifted, the first film and the second film coming out of the one-way film feeding device A can be supported by the film supporting frame 23. When the jacking seat 20 is lowered, the film pulling device B can be avoided, so that the film pulling device B can pull out the first film and the second film on the one-way film feeding device A.

[0086] The transfer device D comprises a transfer fixed frame 24, a transfer driver 25, a transmission screw rod 26, a transfer movable frame 27, a film sucking driver 28, and a film sucking seat 29. The transfer fixed frame 24 is fixedly arranged on the feeding table 1 and is fixedly provided with a front fixed part 30 and a rear fixed part 31 at the front and rear positions. The transfer driver 25 is arranged on the front fixed part 30 or the rear fixed part 31 and is drivingly connected with the transmission screw rod 26 at the power output end. The transmission screw rod 26 is driven to rotate between the front fixed part 30 and the rear fixed part 31 by the transfer driver 25 and is drivingly connected with a transmission part 32 thereon.

[0087] The front fixed part 30 or the rear fixed part 31 is provided with a fixed sliding block 33. The transfer movable frame 27 is fixedly connected with the transmission part 32 and is provided with a transfer movable guide rail 34 slidingly matched with the fixed sliding block 33.

[0088] The transfer movable frame 27 is reciprocally slid forward and backward between the film supporting device C and the first film supporting and lifting device W and the second film supporting and overturning device Y through the cooperation of the transfer driver 25, the transmission screw rod 26, the fixed sliding block 33 and the transfer movable guide rail 34, so that the transfer movable frame 27 can be linearly slid forward and backward, and the stability of the forward and backward sliding is improved.

[0089] In the embodiment, the transfer fixed frame 24 is provided with front and rear position sensors corresponding to the forward and backward sliding of the transfer movable frame 27, so as to sense the forward and backward sliding position of the transfer movable frame 27, and the cut film can be transferred at a specified position.

[0090] The film sucking driver 28 is arranged on the transfer movable frame 27 and is drivingly connected with the film sucking seat 29 at the power output end, the film sucking seat 29 is lifted on the transfer movable frame 27 through the driving of the film sucking driver 28, and the film sucking seat 29 is provided with a film sucking port 89 for sucking the first film and the second film on the film supporting frame 23.

[0091] In the embodiment, the film sucking seat 29 is internally provided with an air flow channel, one end of the air flow channel is connected with a vacuum generator, and the other end is communicated with the film sucking port 89, so that the film sucking seat 29 can suck the first film and the second film on the film supporting frame 23 through the cooperation of the vacuum generator, the air flow channel and the film sucking port 89.

[0092] The transfer movable frame 27 is further fixedly provided with a transfer sliding block 35, the film sucking seat 29 is provided with a film sucking elastic seat 36 and a film sucking guide rail 37, the film sucking elastic seat 36 is provided with a film sucking elastic member, the film sucking seat 29 is elastically drivingly connected with the film sucking driver 28 through the cooperation of the film sucking elastic seat 36 and the film sucking elastic member, and the film sucking guide rail 37 is slidably connected with the transfer sliding block 35, so that the transfer movable frame 27 can be linearly lifted up and down, and the lifting stability is improved, and the film sucking seat 29 can be elastically avoided when it is lowered and contacted with the film supporting frame 23 through the elastic action of the film sucking elastic seat 36 and the film sucking elastic member, so that the collision between the film sucking seat 29 and the film supporting frame 23 is avoided.

[0093] The film sucking seat 29 is further fixedly provided with a film sucking elastic seat 36 and a film sucking guide rail 37, the film sucking elastic seat 36 is provided with a film sucking elastic member, the film sucking seat 29 is elastically drivingly connected with the film sucking driver 28 through the cooperation of the film sucking elastic seat 36 and the film sucking elastic member, and the film sucking guide rail 37 is slidably connected with the transfer sliding block 35, so that the transfer movable frame 27 can be linearly lifted up and down, and the lifting stability is improved, and the film sucking seat 29 can be elastically avoided when it is lowered and contacted with the film supporting frame 23 through the elastic action of the film sucking elastic seat 36 and the film sucking elastic member, so that the collision between the film sucking seat 29 and the film supporting frame 23 is avoided.

[0094] The film sucking seat 29 is further fixedly provided with a film sucking elastic seat 36 and a film sucking guide rail 37, the film sucking elastic seat 36 is provided with a film sucking elastic member, the film sucking seat 29 is elastically drivingly connected with the film sucking driver 28 through the cooperation of the film sucking elastic seat 36 and the film sucking elastic member, and the film sucking guide rail 37 is slidably connected with the transfer sliding block 35, so that the transfer movable frame 27 can be linearly lifted up and down, and the lifting stability is improved, and the film sucking seat 29 can be elastically avoided when it is lowered and contacted with the film supporting frame 23 through the elastic action of the film sucking elastic seat 36 and the film sucking elastic member, so that the collision between the film sucking seat 29 and the film supporting frame 23 is avoided.

[0095] The film cutting device E comprises a film cutting fixing base 40, a film cutting driver 41, a film cutting driving connecting piece 42, and a pneumatic scissors 43. The film cutting fixing base 40 is fixedly arranged on the feeding table 1. The film cutting driver 41 is arranged on the film cutting fixing base 40, and the power output end thereof is drivingly connected with the film cutting driving connecting piece 42. The pneumatic scissors 43 is fixedly arranged on the film cutting driving connecting piece 42, and is reciprocatingly movable between the one-way film feeding device A and the film supporting device C by the driving of the film cutting driver 41, and cuts the first film and the second film between the one-way film feeding device A and the film supporting device C.

[0096] In the embodiment, the film cutting device E is provided with two film cutting devices E which are oppositely arranged between the one-way film feeding device A and the film supporting device C. The two film cutting devices E are oppositely movable in working, and cut the first film and the second film respectively, so as to improve the cutting efficiency and stability of the first film and the second film.

[0097] The film pressing clamp further comprises an assembling bottom plate 50. The first film receiving and lifting device W comprises a first film receiving and lifting driver 51 and a first film receiving and lifting base 52. The first film receiving and lifting driver 51 is arranged on the assembling bottom plate 50, and the power output end thereof is drivingly connected with the first film receiving and lifting base 52. The first film receiving and lifting base 52 is lifted on the assembling bottom plate 50 by the driving of the first film receiving and lifting driver 51, and a first film suction port 53 for positioning and sucking the first film is arranged on the first film receiving and lifting base 52.

[0098] In the embodiment, an air flow channel is arranged in the first film receiving and lifting base 52. One end of the air flow channel is connected with a vacuum generator, and the other end thereof is communicated with the first film suction port 53. The vacuum generator, the air flow channel, and the first film suction port 53 are cooperated, so that the first film receiving and lifting base 52 can position and suck the first film, so as to avoid the displacement of the first film when the first film receiving and lifting base 52 is lifted.

[0099] The feeding device X comprises a feeding driver 54, a feeding transmission piece 55, a feeding movable table 56, and a material rack 57. The feeding driver 54 is arranged on the assembling bottom plate 50, and the power output end thereof is drivingly connected with the feeding transmission piece 55. The feeding transmission piece 55 is drivingly connected with the feeding movable table 56. The feeding movable table 56 is reciprocatingly movable on the assembling bottom plate 50 in the direction of the first film receiving and lifting device W by the cooperation of the feeding driver 54 and the feeding transmission piece 55. The material rack 57 is fixedly arranged on the feeding movable table 56, and a feeding position 58 for positioning and placing the connecting pipe and the isolation piece is arranged on the material rack 57.

[0100] In this embodiment, when the feeding movable table 56 moves towards the direction of the first film receiving and lifting device W, the connected pipe and the isolation piece placed in position can be transported to the space between the first film receiving and lifting device W and the second film receiving and overturning device Y; when the feeding movable table 56 moves away from the first film receiving and lifting device W, i.e. away from the first film receiving and lifting device W and the second film receiving and overturning device Y, the connected pipe and the isolation piece can be placed in position.

[0101] The second film receiving and overturning device Y comprises a second film receiving support 59, a second film receiving driver 60, an overturning shaft 61 and a second film receiving and overturning assembly 62; the second film receiving support 59 is fixedly arranged on the assembly bottom plate 50; the second film receiving driver 60 is arranged on the second film receiving support 59 and is drivingly connected with the overturning shaft 61 at the power output end; the second film receiving and overturning assembly 62 is fixedly connected with the overturning shaft 61 and is overturned on the second film receiving support 59 through the cooperation of the overturning shaft 61 and the second film receiving driver 60.

[0102] The feeding movable table 56 is provided with a feeding movable table limiting piece 63; the assembly bottom plate 50 or the second film receiving support 59 is provided with a limiting cooperation piece 64; when the feeding movable table 56 moves at least towards the direction of the first film receiving and lifting device W, it is limited on the limiting cooperation piece 64 through the feeding movable table limiting piece 63.

[0103] In this embodiment, the cooperation between the feeding movable table limiting piece 63 and the limiting cooperation piece 64 can limit the feeding movable table 56 at least when it moves towards the direction of the first film receiving and lifting device W, so that the connected pipe and the isolation piece placed in position on the feeding position 58 can move to the specified position and be just located between the first film and the second film.

[0104] In this embodiment, a soft piece is arranged between the feeding movable table limiting piece 63 and the limiting cooperation piece 64, so as to avoid the collision or vibration of the feeding movable table limiting piece 63 and the limiting cooperation piece 64 when limiting, improve the service life of the feeding movable table limiting piece 63 and the limiting cooperation piece 64, and improve the transportation stability of the connected pipe and the isolation piece.

[0105] The second film receiving and overturning assembly 62 comprises an overturning support 65, an overturning connecting plate 66, a pressing plate 67 and a second film receiving seat 68. The overturning support 65 is fixedly connected with the overturning shaft 61. The overturning connecting plate 66 is fixedly arranged on the overturning support 65. The pressing plate 67 is located on one side of the overturning connecting plate 66 and is drivingly connected with the pressing device Z. The second film receiving seat 68 is located on the other side of the overturning connecting plate 66 and is fixedly connected with the pressing plate 67. The pressing plate 67 drives the second film receiving seat 68 to move on the overturning connecting plate 66 simultaneously through the driving of the pressing device Z. The second film receiving seat 68 is further provided with a second film suction port 69 for positioning and sucking the second film.

[0106] In the embodiment, the second film receiving seat 68 is internally provided with an air flow channel. One end of the air flow channel is connected with a vacuum generator, and the other end is communicated with the second film suction port 69. Through the cooperation of the vacuum generator, the air flow channel and the second film suction port 69, the second film receiving seat 68 can position and suck the second film, so as to avoid displacement of the second film when the second film receiving seat 68 is overturned.

[0107] In order to improve the fixing stability and the movement stability between the overturning connecting plate 66 and the pressing plate 67, the overturning connecting plate 66 is provided with a guide sleeve 70, and a guide rod 71 is arranged between the pressing plate 67 and the second film receiving seat 68 and fixedly connected with the two. The guide rod 71 moves up and down on the guide sleeve 70 when the pressing plate 67 and the second film receiving seat 68 move.

[0108] That is, in the embodiment, the overturning connecting plate 66 and the pressing plate 67 are stably connected through the guide rod 71, and the overturning connecting plate 66 and the pressing plate 67 can move up and down on the guide sleeve 70 through the guide rod 71, so as to ensure that the overturning connecting plate 66 and the pressing plate 67 can linearly ascend and descend on the overturning connecting plate 66.

[0109] The pressing plate 67 or the second film receiving seat 68 is provided with a receiving and overturning elastic member 72 between the pressing plate 67 or the second film receiving seat 68 and the overturning support 65 or the overturning connecting plate 66. The second film receiving seat 68 elastically moves towards the pressing plate 67 through the elastic force of the receiving and overturning elastic member 72. The overturning support 65 is provided with a limiting groove 73. The second film receiving seat 68 or the pressing plate 67 is limitedly moved on the limiting groove 73.

[0110] In this embodiment, the receiving and turning elastic member 72 is a tension spring, one end of which elastically acts on the second film receiving seat 68, and the other end of which elastically acts on the turning support 65, so that the second film receiving seat 68 is elastically movable towards the direction of the pressing plate 67 in the natural state. The second film receiving seat 68 is located in the limiting groove 73, that is, the second film receiving seat 68 can be limitedly movable in the limiting groove 73 by the elastic force of the receiving and turning elastic member 72 and the pressing force of the pressing device Z.

[0111] The pressing device Z comprises a pressing support 74, a pressing support driver 75, a pressing support transmission member 76, a pressing driver 77 and a pressing plate 78. The pressing support driver 75 is arranged on the assembly bottom plate 50, and the power output end thereof is drivingly connected with the pressing support transmission member 76. The pressing support transmission member 76 is drivingly connected with the pressing support 74. The pressing support 74 is reciprocally movable on the assembly bottom plate 50 towards the direction of the first film receiving and lifting device W by the cooperation of the pressing support driver 75 and the pressing support transmission member 76. The pressing driver 77 is arranged on the pressing support 74, and the power output end thereof is drivingly connected with the pressing plate 78. The pressing support 74 is further provided with a pressing guide rail 79. The pressing plate 78 is further provided with a pressing sliding block 80 which is slidingly matched with the pressing guide rail 79. The pressing plate 78 is lifted on the pressing support 74 by the cooperation of the pressing driver 77, the pressing guide rail 79 and the pressing sliding block 80, so as to ensure that the pressing plate 78 can be linearly lifted and the lifting stability thereof is improved.

[0112] When the pressing plate 78 is lowered, the pressing plate 67 and the second film receiving seat 68 are driven to be lowered on the turning connecting plate 66. When the second film receiving seat 68 is lowered, it is relied on the first film receiving seat 52, so that the second film on the second film receiving seat 68, the connecting pipe, the isolation member and the first film on the first film receiving seat 52 are mutually abutted.

[0113] When the pressing plate 78 is lifted, it is separated from the pressing plate 67. When the pressing plate 67 is separated from the pressing plate 78, the pressing plate 67 and the second film receiving seat 68 are reset by the elastic force of the receiving and turning elastic member 72, so that the second film receiving seat 68 is separated from the first film receiving seat 52.

[0114] The turning laser gap 81 for laser passing through is arranged on the turning connecting plate 66, the pressing plate 67 and the second film receiving seat 68 respectively. The pressing laser gap 82 for laser passing through is arranged on the pressing plate 78.

[0115] When the first film, the connecting pipe, the second film and the spacer abut against each other, the positions to be welded are located on the turnover laser notch 81 and the pressing laser notch 82, and the laser can pass through the turnover laser notch 81 and the pressing laser notch 82 to weld the positions of the first film, the connecting pipe, the second film and the spacer abutting against each other.

[0116] The feeding movable platform 56 and the pressing support 74 are respectively provided with a feeding sliding block 83 and a pressing support sliding block 84, and the assembly base plate 50 is provided with a base plate guide rail 85, and the feeding sliding block 83 and the pressing support sliding block 84 slide on the same base plate guide rail 85.

[0117] The same base plate guide rail 85 can be used for the feeding sliding block 83 and the pressing support sliding block 84 to slide, which not only has a simple structure, but also can ensure that the feeding movable platform 56 and the pressing support 74 can linearly slide, improve the sliding stability of the feeding movable platform 56 and the pressing support 74, and also can make the feeding movable platform 56 and the pressing support 74 slide on the same straight line, so as to ensure that the sliding positions of the feeding movable platform 56 and the pressing support 74 are the same.

[0118] The embodiment is also provided with a plurality of position sensors for sensing the reciprocating activity positions of the feeding movable platform 56 and the pressing support 74, so that the feeding movable platform 56 and the pressing support 74 can reciprocate at the specified positions, and the corresponding work of the drivers can be performed when the feeding movable platform 56 and the pressing support 74 move to the specified positions, so as to ensure the normal operation of the welding fixture.

[0119] The film micro-channel laser welding equipment also includes a welding table 86, the film pressing fixture is arranged on the welding table 86, the welding table 86 is fixedly provided with a welding frame 87, and the laser machine 88 moves up and down, front and back, and / or left and right on the welding frame 87, and performs laser welding on the first film, the connecting pipe and the second film when moving.

[0120] The laser welding method of the above film micro-channel laser welding equipment is as follows:

[0121] I. The first film roll and the second film roll are respectively arranged on the two material rolls 2, the connecting pipe and the spacer are placed on the feeding device X, then the first film of the first film roll and the second film of the second film roll are respectively wound on the film guide wheel 3, the film guide wheel 3 guides the first film and the second film to the direction of the unidirectional film feeding device A, at this time, the unidirectional film feeding device A is loosened, and the first film and the second film are fed;

[0122] II. The film pulling device B moves towards the unidirectional film feeding device A and clamps the first film and the second film, then the film pulling device B moves away from the unidirectional film feeding device A and pulls out the first film and the second film, at this time the unidirectional film feeding device A outputs the first film and the second film in a non-flat state;

[0123] III. The film supporting device C rises and supports the first film and the second film, and the transfer device D descends and presses the first film and the second film on the film supporting device C;

[0124] IV. The unidirectional film feeding device A presses the first film and the second film, the film pulling device B releases the first film and the second film, the film cutting device E works and simultaneously cuts the first film and the second film between the unidirectional film feeding device A and the film supporting device C, then the transfer device D sucks the first film and the second film, and the film supporting device C descends;

[0125] V. The transfer device D rises and moves towards the first film receiving lifting device W and the second film receiving turnover device Y to transfer the first film and the second film to above the first film receiving lifting device W and the second film receiving turnover device Y, respectively;

[0126] VI. The first film receiving lifting device W rises, and the transfer device D descends, so that the first film is placed on the first film receiving lifting device W and the second film is placed on the second film receiving turnover device Y, at this time the first film receiving lifting device W positions and sucks the first film and descends, the second film receiving turnover device Y positions and sucks the second film, then the transfer device D returns to the initial position;

[0127] VII. The feeding device X moves towards the first film receiving lifting device W, so that the connecting pipe and the isolation piece are above the first film, then the second film receiving turnover device Y turns over, so that the second film is above the connecting pipe and the isolation piece;

[0128] VIII. The pressing device Z presses and acts on the second film receiving turnover device Y, so that the second film on the second film receiving turnover device Y is attached above the connecting pipe and the isolation piece, and the connecting pipe and the isolation piece are attached above the first film;

[0129] IX. The laser machine 88 works and laser welds the first film, the connecting pipe and the second film to manufacture a film micro-channel product.

[0130] The above are the preferred schemes of the present application, which show and describe the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A thin film microchannel laser welding apparatus comprising a laser machine (88), characterized in that: It also includes a film feeding machine at the feeding end of the laser machine (88), a film pressure clamp at the laser working end of the laser machine (88); The film feeding machine includes a material roll (2) provided with a first film roll and a second film roll, a film guide wheel (3) for guiding a first film on the first film roll and a second film on the second film roll respectively, a one-way film feeding device (A) for simultaneously feeding the first film and the second film in one direction, a film pulling device (B) for simultaneously pulling out the first film and the second film, a film supporting device (C) for simultaneously supporting the first film and the second film, a transfer device (D) for simultaneously pressing and transferring the first film and the second film, and a film cutting device (E) for simultaneously cutting the first film and the second film. The film pressure clamp includes a first film receiving and lifting device (W) for receiving and lifting the first film, a feeding device (X) for feeding a connecting pipe and a spacer, a second film receiving and overturning device (Y) for receiving and overturning the second film, and a pressing device (Z) for pressing the first film, the second film, the connecting pipe and the spacer.

2. The apparatus for laser welding of thin film microfluidic channels according to claim 1, wherein: The film feeding machine further includes a feeding table (1); the material roll (2) and the film guide wheel (3) are sequentially arranged on the feeding table (1); The one-way film feeding device (A) is located at the film outlet end of the film guide wheel (3) and includes a one-way film feeding support (5), a deformation film feeding support (9) and a film pressing block (10); the one-way film feeding support (5) is provided with an upper film feeding roller (6) and a lower film feeding roller (7) arranged in rotation at upper and lower positions respectively; the upper film feeding roller (6) or the lower film feeding roller (7) is provided with an eccentric shaft (8); the upper film feeding roller (6) and the lower film feeding roller (7) rely on and separate from each other through the eccentric shaft (8) during rotation, so as to simultaneously press and release the first film and the second film passing between the upper film feeding roller (6) and the lower film feeding roller (7); the deformation film feeding support (9) is fixedly arranged on the feeding table (1) or the one-way film feeding support (5) and is provided with a shape position opening thereon; the film pressing block (10) is arranged on the deformation film feeding support (9) and is provided with a shape position matching opening thereon, the shape position matching opening and the shape position opening cooperate with each other, and the first film and the second film coming out between the upper film feeding roller (6) and the lower film feeding roller (7) are simultaneously output in a non-flat state.

3. The apparatus for laser welding of thin film microfluidic channels according to claim 2, wherein: The film pulling device (B) comprises a pneumatic clamping arm (11), a clamping arm support (12) and a film pulling driver (13); the film pulling driver (13) is arranged on the film feeding table (1) and is provided with a film pulling driving element (14) at the power output end thereof; the film pulling driving element (14) is drivingly connected with the clamping arm support (12); the clamping arm support (12) is reciprocally movable forward and backward on the film outlet end of the one-way film feeding device (A) through cooperation of the film pulling driver (13) and the film pulling driving element (14); the pneumatic clamping arm (11) is arranged on the clamping arm support (12) and simultaneously clamps and releases the first film and the second film on the film outlet end of the one-way film feeding device (A).

4. The apparatus for laser welding of thin film microfluidic channels according to claim 3, wherein: The film supporting device (C) comprises a film supporting fixed base (18), a film supporting driver (19) and a jacking base (20); the film supporting fixed base (18) is located at the film outlet end of the one-way film feeding device (A) and is fixedly arranged on the film feeding table (1); the film supporting driver (19) is arranged on the film supporting fixed base (18) and is drivingly connected with the jacking base (20) at the power output end thereof; the jacking base (20) is drivingly lifted on the film supporting fixed base (18) by the film supporting driver (19); the jacking base (20) is provided with a film supporting frame (23) for supporting the first film and the second film respectively; The transfer device (D) comprises a transfer fixed frame (24), a transfer driver (25), a transmission screw rod (26), a transfer movable frame (27), a film sucking driver (28) and a film sucking base (29); the transfer fixed frame (24) is fixedly arranged on the film feeding table (1) and is provided with a front fixed element (30) and a rear fixed element (31) at the front and rear positions thereof; the transfer driver (25) is arranged on the front fixed element (30) or the rear fixed element (31) and is drivingly connected with the transmission screw rod (26) at the power output end thereof; the transmission screw rod (26) is drivingly rotated between the front fixed element (30) and the rear fixed element (31) by the transfer driver (25) and is drivingly connected with a transmission element (32) thereon; the transfer movable frame (27) is fixedly connected with the transmission element (32); the transfer movable frame (27) is reciprocally slid forward and backward between the film supporting device (C) and the first film receiving and lifting device (W) and the second film receiving and overturning device (Y) through cooperation of the transfer driver (25), the transmission screw rod (26) and the transmission element (32); the film sucking driver (28) is arranged on the transfer movable frame (27) and is drivingly connected with the film sucking base (29) at the power output end thereof; the film sucking base (29) is drivingly lifted on the transfer movable frame (27) by the film sucking driver (28) and is provided with a film sucking port (89) for sucking the first film and the second film on the film supporting frame (23).

5. The apparatus for laser welding of thin film microfluidic channels according to claim 4, wherein: The film cutting device (E) comprises a film cutting fixing base (40), a film cutting driver (41), a film cutting driving connecting piece (42) and a pneumatic scissors (43). The film cutting fixing base (40) is fixedly arranged on the feeding table (1). The film cutting driver (41) is arranged on the film cutting fixing base (40) and is drivingly connected with the film cutting driving connecting piece (42) at the power output end. The pneumatic scissors (43) are fixedly arranged on the film cutting driving connecting piece (42) and are reciprocatingly movable between the one-way film feeding device (A) and the film supporting device (C) by the driving of the film cutting driver (41), and cut the first film and the second film between the one-way film feeding device (A) and the film supporting device (C).

6. The apparatus for laser welding of thin film microfluidic channels of claim 1, wherein: The film pressing clamp further comprises an assembly bottom plate (50). The first film receiving and lifting device (W) comprises a first film receiving and lifting driver (51) and a first film receiving and lifting base (52). The first film receiving and lifting driver (51) is arranged on the assembly bottom plate (50) and is drivingly connected with the first film receiving and lifting base (52) at the power output end. The first film receiving and lifting base (52) is lifted on the assembly bottom plate (50) by the driving of the first film receiving and lifting driver (51) and is provided with a first film suction port (53) for positioning and sucking the first film. The feeding device (X) comprises a feeding driver (54), a feeding transmission piece (55), a feeding movable table (56) and a material rack (57). The feeding driver (54) is arranged on the assembly bottom plate (50) and is drivingly connected with the feeding transmission piece (55) at the power output end. The feeding transmission piece (55) is drivingly connected with the feeding movable table (56). The feeding movable table (56) is reciprocatingly movable on the assembly bottom plate (50) towards the first film receiving and lifting device (W) by the cooperation of the feeding driver (54) and the feeding transmission piece (55). The material rack (57) is fixedly arranged on the feeding movable table (56) and is provided with a feeding position (58) for positioning and placing the connecting pipe and the isolation piece.

7. The apparatus for laser welding of thin film microfluidic channels according to claim 6, wherein: The second film receiving and overturning device (Y) comprises a second film receiving and overturning support (59), a second film receiving and overturning driver (60), an overturning shaft (61) and a second film receiving and overturning assembly (62). The second film receiving and overturning support (59) is fixedly arranged on the assembly bottom plate (50). The second film receiving and overturning driver (60) is arranged on the second film receiving and overturning support (59) and is drivingly connected with the overturning shaft (61) at the power output end. The second film receiving and overturning assembly (62) is fixedly connected with the overturning shaft (61) and is overturned on the second film receiving and overturning support (59) by the cooperation of the overturning shaft (61) and the second film receiving and overturning driver (60). The second film receiving and overturning assembly (62) comprises an overturning support (65), an overturning connecting plate (66), a pressing plate (67) and a second film receiving seat (68); the overturning support (65) is fixedly connected with the overturning shaft (61); the overturning connecting plate (66) is fixedly arranged on the overturning support (65); the pressing plate (67) is located on one side of the overturning connecting plate (66) and is drivingly connected with the pressing device (Z); the second film receiving seat (68) is located on the other side of the overturning connecting plate (66) and is fixedly connected with the pressing plate (67); the pressing plate (67) is driven by the pressing device (Z) to simultaneously drive the second film receiving seat (68) to move on the overturning connecting plate (66); the second film receiving seat (68) is further provided with a second film suction port (69) for positioning and sucking the second film.

8. The apparatus for laser welding of thin film microfluidic channels according to claim 7, wherein: The pressing device (Z) comprises a pressing support (74), a pressing support driver (75), a pressing support transmission member (76), a pressing driver (77) and a pressing plate (78); the pressing support driver (75) is arranged on the assembly bottom plate (50) and its power output end is drivingly connected with the pressing support transmission member (76); the pressing support transmission member (76) is drivingly connected with the pressing support (74); the pressing support (74) is reciprocally movable on the assembly bottom plate (50) towards the direction of the first film receiving and lifting device (W) through the cooperation of the pressing support driver (75) and the pressing support transmission member (76); the pressing driver (77) is arranged on the pressing support (74) and its power output end is drivingly connected with the pressing plate (78); the pressing plate (78) is lifted on the pressing support (74) through the driving of the pressing driver (77); When the pressing plate (78) is lowered, the pressing plate (67) and the second film receiving seat (68) are lowered on the overturning connecting plate (66) and the second film receiving seat (68) is rested on the first film receiving seat (52) so that the second film on the second film receiving seat (68), the connecting pipe, the isolation member, the first film on the first film receiving seat (52) are in close contact with each other; When the pressing plate (78) is lifted, the pressing plate (67) is separated from the pressing plate (78); when the pressing plate (67) is separated from the pressing plate (78), the pressing plate (67) and the second film receiving seat (68) are reset by the elastic force of the receiving and overturning elastic member (72) so that the second film receiving seat (68) is separated from the first film receiving seat (52).

9. The apparatus for laser welding of thin film microfluidic channels of claim 1, wherein: Also includes a welding table (86); the thin film crimping fixture is arranged on the welding table (86); the welding table (86) is fixedly provided with a welding frame (87); the laser machine (88) is movable up and down, front and back, and / or left and right on the welding frame (87), and performs laser welding on the first film, the connecting pipe and the second film when moving.

10. A method of laser welding, characterized by: The laser welding method of the thin film microchannel laser welding equipment according to any one of claims 1-9 is as follows: I. The first film roll and the second film roll are respectively installed on two material rolls (2), the connecting pipe and the spacer are placed on the feeding device (X), then the first film of the first film roll and the second film of the second film roll are respectively wound on the film guide wheel (3), the film guide wheel (3) guides the first film and the second film to the direction of the one-way film feeding device (A), at this time, the one-way film feeding device (A) is loosened and the first film and the second film pass through; II. The film pulling device (B) moves towards the one-way film feeding device (A) and clamps the first film and the second film, then the film pulling device (B) moves away from the one-way film feeding device (A) and pulls out the first film and the second film at the same time, at this time, the one-way film feeding device (A) outputs the first film and the second film in a non-flat state; III. The film supporting device (C) rises and supports the first film and the second film at the same time, the transfer device (D) descends and presses the first film and the second film on the film supporting device (C); IV. The one-way film feeding device (A) compresses the first film and the second film, the film pulling device (B) loosens the first film and the second film, the film cutting device (E) works and simultaneously cuts the first film and the second film between the one-way film feeding device (A) and the film supporting device (C), then the transfer device (D) sucks the first film and the second film, and the film supporting device (C) descends; V. The transfer device (D) rises and moves towards the first film receiving lifting device (W) and the second film receiving turnover device (Y) to transfer the first film and the second film to above the first film receiving lifting device (W) and the second film receiving turnover device (Y) respectively; VI. The first film receiving lifting device (W) rises, the transfer device (D) descends, the first film is placed on the first film receiving lifting device (W), and the second film is placed on the second film receiving turnover device (Y), at this time, the first film receiving lifting device (W) positions and sucks the first film and descends, the second film receiving turnover device (Y) positions and sucks the second film, then the transfer device (D) returns to the initial position; Seven, the feeding device (X) moves towards the first film receiving and lifting device (W), so that the connecting tube and the isolation piece are above the first film, and then the second film receiving and overturning device (Y) overturns, so that the second film is above the connecting tube and the isolation piece; Eight, the pressing device (Z) presses and acts on the second film receiving and overturning device (Y), so that the second film on the second film receiving and overturning device (Y) is attached above the connecting tube and the isolation piece, and the connecting tube and the isolation piece are attached above the first film; Nine, the laser machine (88) works and performs laser welding on the first film, the connecting tube and the second film to manufacture a film micro-channel product.

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