Laser welding device and laser welding method for automatic mounting of rearview mirror

Abstract

The invention relates to a laser welding device and a laser welding method for automatic mounting of rearview mirrors, and belongs to the technical field of rearview mirror assembly. The device comprises an operation station, a first bearing table, a second bearing table, a welding mechanism, a raw material frame and a finished product frame, and the first bearing table and the second bearing table are arranged on the peripheries of the two adjacent edges of the operation station correspondingly and used for assembling and laser welding of lens assemblies correspondingly; the welding mechanism is arranged on the second bearing table and used for conducting laser welding on the lens assembly. The raw material frame and the finished product frame are arranged on the periphery of the operation station, the raw material frame is close to the first bearing table, and the finished product frame is close to the second bearing table. The method is applied to the device and comprises the steps of plastic back plate treatment, heating sheet treatment, lens treatment and laser welding. The lens assembly has the effect of improving the assembly efficiency and the assembly quality of the lens assembly.

Description

Technical Field

[0001] The present application relates to the technical field of rearview mirror assembly, and in particular to a laser welding device and a laser welding method for automatic mounting of rearview mirrors. Background Art

[0002] A rearview mirror is a tool for the driver to obtain information about the rear, sides and bottom of the car in the cab. The rearview mirror includes a frame and a lens assembly. The frame is used to achieve assembly connection with the car, and the lens assembly is arranged on the frame to reflect the surrounding conditions.

[0003] The lens assembly includes a plastic back plate, a heating plate and a lens. During the assembly of the rearview mirror, the lens assembly needs to be assembled and installed on the frame. Currently, the assembly of the lens assembly is mostly done manually.

[0004] However, manual assembly is not only not conducive to improving production efficiency and consuming a lot of manpower costs, but also causes poor relative positioning of lens components during assembly, uneven product quality, and affects product yield.

[0005] With respect to the above-mentioned related technologies, the inventors believe that there are defects in that the lens assembly efficiency is low and the assembly quality is poor. Summary of the invention

[0006] In order to improve the assembly efficiency and assembly quality of lens components, the present application provides a laser welding device and a laser welding method for automatic mounting of rearview mirrors.

[0007] In the first aspect, the laser welding device for automatic mounting of rearview mirrors provided in the present application adopts the following technical solution: A laser welding device for automatic mounting of a rearview mirror, used for assembling and welding the lens assembly of the rearview mirror, comprises: an operating station; a first bearing platform and a second bearing platform, wherein the first bearing platform and the second bearing platform are respectively arranged at the periphery of two adjacent sides of the operating station, and the first bearing platform and the second bearing platform are respectively used for assembling and laser welding the lens assembly; a welding mechanism, arranged on the second bearing platform, and used for laser welding the lens assembly; a raw material rack and a finished product rack, wherein the raw material rack and the finished product rack are both arranged at the periphery of the operating station, the raw material rack is arranged close to the first bearing platform, and the finished product rack is arranged close to the second bearing platform.

[0008] By adopting the above technical solution, the first load platform, the second load platform, the raw material rack and the finished product rack are arranged around the operating station, which can reduce the moving distance of the operator and help improve the assembly efficiency; the operator can realize the processing of different processes at the operating station and reduce the labor cost; the laser welding method realized by the welding mechanism helps to improve the welding quality, welding efficiency and product yield compared with manual welding.

[0009] Optionally, the first supporting platform is provided with a supporting assembly, which includes a supporting plate, a supporting member and a connecting member, a pressure sensor and an inflatable airbag, one end of the supporting member is fixed, the pressure sensor is arranged at the other end of the supporting member, the connecting member connects the pressure sensor and the supporting plate, the supporting plate is used to support the lens assembly, the cross-sectional area of ​​the connecting member is smaller than the cross-sectional area of ​​the supporting plate, and the inflatable airbag is arranged on the side of the supporting plate away from the connecting member.

[0010] By adopting the above technical solution, the support member provides support for the pressure sensor, so that the pressure sensor and the inflatable airbag can be arranged on both sides of the supporting plate, so as to accurately obtain pressure data when the inflatable airbag presses the supporting plate. A connecting member with a smaller cross-sectional area is arranged between the supporting plate and the pressure sensor, which helps to concentrate the pressure of the supporting plate on the pressure sensor, improve the accuracy of pressure measurement, and thereby enable the lens to be reliably bonded to the plastic back panel.

[0011] In the second aspect, the laser welding method for automatic mounting of rearview mirrors provided in the present application adopts the following technical solution: A laser welding method for automatic mounting of a rearview mirror is applied to the above-mentioned laser welding device for automatic mounting of a rearview mirror. The lens assembly includes a plastic backboard, a heating plate and a lens. The laser welding method for automatic mounting of a rearview mirror includes the following steps: plastic backboard processing, placing the plastic backboard on the first supporting platform, and surface processing the side of the plastic backboard away from the first supporting platform; heating plate processing, tearing off the film of the heating plate by a manipulator assembly, and attaching the heating plate to the side of the plastic backboard away from the first supporting platform; lens processing, the manipulator assembly absorbs the lens, locates the position of the plastic backboard by a CCD camera, aligns the lens with the plastic backboard, and then attaches the lens to the side of the heating plate away from the plastic backboard; laser welding, laser welding the wiring harness on the plastic backboard to the conductive part on the lens, so that the wiring harness is electrically connected to the lens.

[0012] By adopting the above technical scheme, during the assembly process, the plastic back plate is first placed on the first bearing platform to provide stable support for the plastic back plate, and the side of the plastic back plate away from the first bearing platform is surface treated to increase the surface roughness of the plastic back plate and destroy the surface tension of the plastic back plate, so as to achieve reliable bonding to the heating plate; the heating plate is automatically peeled off by the manipulator assembly to improve the processing efficiency and tearing effect of the heating plate, and the heating plate is bonded to the plastic back plate; the position of the plastic back plate on the first bearing platform is located by the CCD camera, and the lens is adsorbed and aligned with the plastic back plate by the manipulator assembly, and then the lens is bonded to the heating plate to achieve preliminary assembly of the plastic back plate, the heating plate and the lens, and the degree of automation is improved by the manipulator assembly, thereby improving assembly efficiency and assembly quality; after the lens assembly is initially assembled, the wiring harness on the plastic back plate is welded to the conductive part on the lens by laser welding to electrically connect the lens, so that the defogging and anti-glare functions can be achieved by electrifying the lens; compared with manual welding, the laser welding method helps to improve welding quality, reduce product defective rate, and improve assembly quality.

[0013] Optionally, it further includes a pressure-maintaining treatment, which is performed after the lens treatment, and presses the lens through an inflated airbag to make the lens fit onto the plastic back plate.

[0014] By adopting the above technical solution, the lens can be pressed onto the plastic back plate, thereby improving the firmness of the lens bonding; and the pressure-maintaining method of the inflated airbag pressing the lens is convenient for applying to lenses with different curvature radii, thereby improving applicability.

[0015] Optionally, the pressure-maintaining treatment also includes: pressure adjustment, placing the lens assembly on a supporting plate, the side of the plastic back plate away from the lens is attached to the supporting plate, the inflatable airbag presses the lens, and the degree of attachment between the lens and the plastic back plate is determined by the value displayed by the pressure sensor.

[0016] By adopting the above technical solution, it is helpful to intuitively obtain the pressure between the lens and the plastic back plate through the value of the pressure sensor, which helps to balance the pressure on the lens and improve the reliability of lens assembly.

[0017] Optionally, quality inspection is also included. The quality inspection is performed after the laser welding. The welding points are photographed by the CCD camera to determine the welding quality of the welding points.

[0018] By adopting the above technical solution, after laser welding, by taking pictures of the welding points, it is convenient to stably and reliably observe the appearance of the welding points, so as to judge whether the welding quality meets the standards.

[0019] Optionally, a power-on test is further included, and the power-on test is arranged after the quality inspection, and the connector of the wiring harness is connected to a power source to test whether the lens assembly can be powered on.

[0020] By adopting the above technical solution, after the lens assembly is assembled, it can be tested whether the lens assembly can play the corresponding function when powered on, so that the assembly effect of the lens assembly can be detected and processed in time after assembly, thereby reducing the product defect rate.

[0021] Optionally, the method further includes the transportation of the lens assembly, which is performed before the laser welding, and the bonded lens assembly is transported to a second supporting platform so that the plastic back plate is located above the lens.

[0022] By adopting the above technical solution, the lens assembly can be flipped after initial assembly, which helps to perform laser welding on the side of the plastic back panel away from the lens; at the same time, the laser welding and initial assembly of the lens assembly are separated on different supporting platforms, which helps to improve the safety of assembly.

[0023] Optionally, the plastic back panel processing further includes: Laser coding: coding is performed on the plastic back panel by laser processing to record the processing information of the plastic back panel.

[0024] By adopting the above technical solution, it is convenient to trace the assembly process of the lens assembly and improve the degree of informatization.

[0025] Optionally, during the processing of the plastic back panel, the surface of the plastic back panel is treated by plasma technology.

[0026] By adopting the above technical solution, the processing effect on the surface of the plastic back plate can be optimized, so that the plastic back plate can be reliably adhered.

[0027] In summary, the present application includes at least one of the following beneficial technical effects: 1. During the assembly process, the plastic back plate is first placed on the first carrier to provide a stable support for the plastic back plate, and the surface treatment is performed on the side of the plastic back plate away from the first carrier to increase the surface roughness of the plastic back plate and destroy the surface tension of the plastic back plate, so as to achieve reliable bonding to the heating plate; the heating plate is automatically peeled off by the manipulator assembly to improve the processing efficiency and tearing effect of the heating plate, and the heating plate is bonded to the plastic back plate; the position of the plastic back plate on the first carrier is located by the CCD camera, and the lens is adsorbed and aligned with the plastic back plate by the manipulator assembly, and then the lens is bonded to the heating plate to achieve the initial assembly of the plastic back plate, the heating plate and the lens, and the degree of automation is improved by the manipulator assembly, thereby improving the assembly efficiency and assembly quality; after the initial assembly of the lens assembly, the wiring harness on the plastic back plate is welded to the conductive part on the lens by laser welding to electrically connect the lens, so that the defogging and anti-glare functions can be achieved by electrifying the lens; compared with manual welding, the laser welding method helps to improve the welding quality, reduce the product defect rate, and improve the assembly quality; 2. The lens can be pressed onto the plastic back plate to improve the firmness of the lens bonding; and the pressure-maintaining method of the inflated airbag pressing the lens is convenient for lenses with different curvature radii, improving applicability; 3. It helps to intuitively obtain the pressure between the lens and the plastic back plate through the value of the pressure sensor, which helps to balance the pressure on the lens and improve the reliability of lens assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of a laser welding device for automatic mounting of rearview mirrors according to an embodiment of the present application.

[0029] Figure 2 It is a schematic diagram of the bearing assembly of an embodiment of the present application.

[0030] Figure 3 It is a flow chart of a laser welding method for automatic mounting of rearview mirrors according to an embodiment of the present application.

[0031] Figure 4 It is a schematic diagram of the plastic back panel, heating plate and lens of an embodiment of the present application.

[0032] Figure 5 It is a schematic diagram of the assembled lens assembly of an embodiment of the present application.

[0033] Description of reference numerals: 100, plastic back plate; 110, wiring harness; 120, blind area module; 200, heating plate; 300, lens; 310, conductive part; 1. First bearing platform; 11. First station; 12. Second station; 13. Third station; 14. Fourth station; 141. Bearing plate; 142. Support member; 143. Connecting member; 144. Pressure sensor; 145. Inflatable airbag; 2. Second loading platform; 21. Fifth station; 22. Sixth station; 23. Seventh station; 24. Eighth station; 25. Ninth station; 31. First manipulator; 32. Second manipulator; 4. Operation station; 41. Raw material rack; 42. Finished product rack. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1 -Attached Figure 5 The present application is further described in detail. In this embodiment, if not clearly specified, "connected", "connected" and "fixed" are understood in a broad sense, including fixed connection, detachable connection, connection to form an integral structure, mechanical connection, electrical connection, direct connection, indirect connection through an intermediary, internal connection and interaction between two elements, etc., which can be understood according to the specific circumstances. In the absence of any contrary explanation, the directional words used in this application, such as "inside" and "outside", refer to the outline of the corresponding parts themselves.

[0035] like Figure 1 As shown, in the first aspect, an embodiment of the present application discloses a laser welding device for automatic mounting of a rearview mirror (hereinafter referred to as “the device”), which is used for assembling and welding lens components of a rearview mirror.

[0036] like Figure 1 As shown, the operator is located at the operating station 4, which can be a rectangular area. The first carrier 1 and the second carrier 2 for laser welding are arranged on the periphery of the adjacent two sides of the operating station 4, shortening the length of the transfer path and reducing the workload. The periphery of the operating station 4 is also provided with a raw material rack 41 and a finished product rack 42. The raw material rack 41 is arranged close to the first carrier 1, and the finished product rack 42 is arranged close to the second carrier 2, so that the first carrier 1, the second carrier 2, the raw material rack 41 and the finished product rack 42 are arranged around the operating station 4, reducing the moving distance of the operator to place the raw material from the raw material rack 41 to the first carrier 1, and the moving distance of the assembled product from the second carrier 2 to the finished product rack 42, improving efficiency, so that one operator can realize the processing of different processes at the operating station 4, and reducing labor costs. In addition, the setting method of surrounding the operating station 4 can reduce space occupation; one person or multiple people can perform processing at the operating station 4, which has strong applicability. The welding mechanism is arranged on the second supporting platform 2, and the specific arrangement position can be determined according to the welding requirements, and it only needs to be able to perform laser welding on the lens assembly.

[0037] like Figure 1 As shown, the first supporting platform 1 is provided with a first workstation 11 , a second workstation 12 , a third workstation 13 and a fourth workstation 14 . The four workstations are circumferentially distributed on the first supporting platform 1 on the first turntable structure, and the first turntable structure rotates on the first supporting platform 1 .

[0038] The second loading platform 2 is provided with a fifth station 21, a sixth station 22, a seventh station 23, an eighth station 24 and a ninth station 25. The five stations of the second loading platform 2 are circumferentially distributed on the second turntable structure. The second turntable structure rotates on the second loading platform 2 so that the lens components carried thereon can pass through different stations respectively. A buffer table can also be arranged around the operating station 4. The buffer table is arranged between the first loading platform 1 and the second loading platform 2 and is used to temporarily store the preliminarily assembled lens components.

[0039] like Figure 1 and Figure 2 As shown, the bearing assembly includes a bearing plate 141, a support member 142, a connecting member 143, a pressure sensor 144 and an inflatable airbag 145. The lower end of the supporting member 142 is fixed to the first bearing platform 1, and the pressure sensor 144 is arranged at the upper end of the supporting member 142, and the supporting member 142 provides support for the pressure sensor 144. The bearing plate 141 is arranged above the pressure sensor 144, and the inflatable airbag 145 is arranged above the bearing plate 141, so that the pressure sensor 144 and the inflatable airbag 145 can be arranged on the upper and lower sides of the bearing plate 141, so as to obtain pressure data when the inflatable airbag 145 presses the bearing plate 141. The upper and lower ends of the connecting member 143 are respectively connected to the bearing plate 141 and the pressure sensor 144, and the cross-sectional area of ​​the connecting member 143 is smaller than the cross-sectional area of ​​the bearing plate 141, which helps to concentrate the pressure of the bearing plate 141 on the pressure sensor 144 and improve the accuracy of pressure measurement. The support member 142 can be a cylinder, which drives the pressure sensor 144 to move in the direction close to or away from the carrier plate 141 so as to measure the pressure. The connecting member 143 can include a columnar portion and a plate-shaped portion, the plate-shaped portion is arranged at the lower end of the columnar portion, the lower side of the plate-shaped portion fits the pressure sensor 144, and the upper end of the columnar portion connects the lower side of the carrier plate 141. The cross-sectional area of ​​the plate-shaped portion can be the same as the cross-sectional area of ​​the pressure sensor 144, so as to reliably transmit the pressure. The inflatable airbag 145 can be arranged on the moving member, and the inflatable airbag 145 is driven by the moving member to move in the direction close to or away from the carrier plate 141 to realize the pressure-maintaining pressing of the lens assembly. The moving member can be a structure that can realize reciprocating movement, such as a slide rail slider, a cylinder, etc. The inflatable airbag 145 can be made of silicone material to realize flexible contact and pressing.

[0040] like Figure 3As shown, in the second aspect, an embodiment of the present application discloses a laser welding method for automatic mounting of a rearview mirror (hereinafter referred to as the "method"), which is applied to a laser welding device for automatic mounting of a rearview mirror to improve the assembly efficiency and assembly quality of the lens assembly.

[0041] like Figure 4 and Figure 5 As shown, the lens assembly includes a plastic back plate 100, a heating plate 200 and a lens 300. During assembly, the plastic back plate 100, the heating plate 200 and the lens 300 need to be stacked and bonded to form a lens assembly for subsequent assembly into a rearview mirror and installation on a car.

[0042] like Figure 1 , Figure 3 and Figure 4 As shown, the method includes the following steps: plastic back plate processing, heating plate processing, lens processing, pressure holding processing, lens assembly transportation, laser welding, quality inspection and power-on test.

[0043] S10, plastic back plate treatment. The plastic back plate 100 is placed on the first support platform 1 to provide stable support for the plastic back plate 100 so that the heating plate 200 and the lens 300 can be reliably bonded to the plastic back plate 100. The side of the plastic back plate 100 away from the first support platform 1 is surface treated to increase the surface roughness of the plastic back plate 100, destroy the surface tension of the plastic back plate 100, and enable the plastic back plate 100 to be reliably bonded. The plastic back plate 100 can be surface treated by plasma technology to adapt to the shape of the plastic back plate 100, improve the uniformity of the surface treatment, optimize the treatment effect on the surface of the plastic back plate 100, and reduce the effects of heat and deformation on the plastic back plate 100 during the surface treatment process.

[0044] like Figure 1 , Figure 3 and Figure 4 As shown, the plastic back plate processing also includes: S11, laser coding. Coding is performed on the plastic back plate 100 by laser processing to record the processing information of the plastic back plate 100, so as to facilitate the traceability of the assembly process of the lens assembly and improve the degree of informatization. Laser coding can be set after the plastic back plate 100 is placed on the first supporting platform 1, or the plastic back plate 100 can be placed on the first supporting platform 1 after laser coding.

[0045] S20, heating sheet processing. Both sides of the heating sheet 200 can be bonded. Before bonding, both sides of the heating sheet 200 are covered with a release film for easy placement and removal. After the film of the heating sheet 200 is torn off by the robot assembly, the heating sheet 200 is attached to the side of the plastic back plate 100 away from the first carrier 1.

[0046] like Figure 1, Figure 3 and Figure 4 As shown, the manipulator assembly includes a first manipulator 31, which is used to clamp and automatically tear off the film of the heating plate 200, thereby improving the processing efficiency and tearing effect of the heating plate 200, so as to achieve the bonding of the heating plate 200 and the plastic back plate 100. The first manipulator 31 can select a suitable manipulator structure to clamp and tear off the heating plate 200, and bond the heating plate 200 to the plastic back plate 100.

[0047] S30, lens processing. The second manipulator 32 of the manipulator assembly adsorbs the lens 300, and the CCD camera locates the position of the plastic back plate 100 on the first carrier 1. The second manipulator 32 drives the lens 300, and after the lens 300 is aligned with the plastic back plate 100, the lens 300 is attached to the side of the heating plate 200 away from the plastic back plate 100, thereby realizing the preliminary assembly of the plastic back plate 100, the heating plate 200 and the lens 300. In this method, the degree of automation is improved by the manipulator assembly, thereby improving the assembly efficiency and assembly quality of the lens assembly; the positioning accuracy of the lens 300 and the plastic back plate 100 is improved by the CCD camera positioning, thereby reducing the problem of interference and scratching of the lens 300 caused by assembly deviation.

[0048] like Figure 1 , Figure 3 and Figure 4 As shown, the second manipulator 32 uses a manipulator structure of a suitable model, which can absorb the lens 300 and drive the lens 300 to stick to the side of the heating plate 200 away from the plastic back plate 100, so that the heating plate 200 is clamped between the plastic back plate 100 and the lens 300.

[0049] S40, pressure-maintaining treatment. After the lens assembly is initially assembled, the lens 300 is located above the plastic back plate 100 on the first support platform 1. The lens 300 is pressed by the inflatable airbag 145 so that the lens 300 can be tightly attached to the plastic back plate 100. The pressure-maintaining treatment can improve the firmness of the adhesion of the lens 300; and, due to the use requirements of the automobile rearview mirror, the curvature radius of the lens 300 used is different. The pressure-maintaining treatment method of the flexible inflatable airbag 145 pressing the lens 300 facilitates the inflatable airbag 145 to fit the lens 300, so that it can be used to press lenses 300 with different curvature radii, thereby improving the applicability of the method.

[0050] like Figure 1 , Figure 2 and Figure 4As shown, optionally, the pressure-maintaining treatment further includes: S41, pressure adjustment. The first bearing platform 1 is provided with a bearing assembly, and the lens assembly after preliminary assembly is placed on the bearing assembly. A pressure sensor 144 is provided on the bearing assembly, and the side of the plastic back plate 100 away from the lens 300 is attached to the bearing assembly, and the inflatable airbag 145 presses the lens 300. The degree of attachment between the lens 300 and the plastic back plate 100 is determined by the value displayed by the pressure sensor 144, so that the lens 300 can be reliably attached to the plastic back plate 100, and reliable pressure maintenance is achieved. It can be understood that a display structure can be provided on the first bearing platform 1, and the pressure data can be displayed by electrically connecting the display structure and the pressure sensor 144, so that the pressure between the lens 300 and the plastic back plate 100 can be intuitively obtained through the pressure value, and it can be determined whether the lens 300 is reliably attached to the plastic back plate 100, thereby helping to balance the pressure on the lens 300 and improve the reliability of the assembly of the lens 300.

[0051] S50, transfer of lens assembly. The lens assembly that has been preliminarily assembled after laminating the lens 300 is transferred from the first carrier 1 to the second carrier 2, and the lens assembly is flipped so that the plastic back plate 100 is located above the lens 300, which is helpful for subsequent laser welding of the side of the plastic back plate 100 away from the lens 300 by the welding mechanism. At the same time, the laser welding and the preliminarily assembly of the lens assembly are arranged in different areas, which helps to make the laser welding process relatively independent and improve the safety of the preliminarily assembly process.

[0052] like Figure 1 , Figure 3 and Figure 4 As shown, in this embodiment, laser coding is performed at the first station 11, plastic back plate processing and heating plate processing are performed at the second station 12, lens processing is performed at the third station 13, and pressure holding processing is performed at the fourth station 14. The first turntable structure is rotated to allow the raw materials placed thereon to respectively implement different steps of the assembly process to form a preliminarily assembled lens assembly. The fifth station 21 is used to detect whether there are any missing parts in the preliminarily assembled lens assembly transferred from the first carrier 1 through a CCD camera, and to detect and correct them in time to avoid the loss of time and raw materials caused by the discovery after welding.

[0053] S60, laser welding. The wiring harness 110 on the plastic back plate 100 is laser welded to the conductive part 310 on the lens 300, so that the wiring harness 110 is electrically connected to the lens 300. In this embodiment, the lens 300 adopts an ES lens, and the relevant principles of electrochromism are applied to control the color and transparency of the ES lens by voltage. The ES lens is installed on the exterior rearview mirror of the car. The driver can observe the side and rear of the vehicle through the ES lens during driving; when driving at night, the anti-color rate of the glass can be reduced by discoloring the glass, reducing the interference and dizziness of the driver caused by strong light, and ensuring safe driving.

[0054] like Figure 3-Figure 5 As shown, the wiring harness 110 is electrically connected to the plastic back plate 100, and the wiring harness 110 has two connection ends. The conductive part 310 is provided on the lens 300, and the conductive part 310 is a conductive metal structure. The two connection ends of the wiring harness 110 are respectively connected to the two conductive parts 310 to achieve electrical connection between the plastic back plate 100 and the lens 300. The wiring harness 110 also includes a connector, which is used to energize the wiring harness 110, and then the conductive part 310 can be energized to achieve voltage regulation of the ES lens. After the lens assembly is initially assembled, the wiring harness 110 on the plastic back plate 100 is welded to the conductive part 310 on the lens 300 by laser welding through a welding mechanism, so that the lens 300 is electrically connected, so that the defog and anti-glare functions can be achieved by energizing the lens 300. Compared with manual welding, the laser welding method has a fast welding speed and a small deformation, which helps to improve the welding quality, reduce the product defect rate, and improve the assembly quality.

[0055] S70, quality inspection. Quality inspection is performed after laser welding. The welding points are photographed by a CCD camera, and the welding quality of the welding points is judged based on factors such as the surface quality and shape of the welding points, thereby judging whether the welding quality meets the standards, so as to eliminate lens components with low welding quality and improve assembly quality; at the same time, quality inspection can also timely re-weld lens components with substandard welding quality to improve output quality.

[0056] like Figure 1-Figure 3 As shown, laser welding and quality inspection are both performed at the sixth station 22 of the second carrier 2, so that the quality of the welding points can be promptly inspected after laser welding, so that the welding points with substandard welding quality can be re-welded to improve the quality of the lens assembly. Laser welding is achieved through a welding mechanism, and the welding mechanism can select an existing welding structure of a suitable model to achieve laser welding; in view of the existing relevant technology of the welding mechanism, its specific structure and working principle are not described in detail here.

[0057] S80, power-on test. The power-on test is set after the quality inspection. The connector of the wiring harness 110 is connected to the power supply to test whether the lens assembly can be powered on. The lens assembly can be tested to see whether it can play the corresponding function when powered on. The assembly effect of the lens assembly can be detected and processed in time after assembly, thereby reducing the product defect rate. The power-on test can drive the connector to connect to the power supply through a structure such as a cylinder or a telescopic rod to improve the degree of automation.

[0058] like Figure 1 , Figure 3 and Figure 4As shown, the power-on test includes the first stage, the second stage and the third stage. In the first stage, after the lens assembly is powered on, observe whether the lens 300 changes in color or transparency to determine whether the ES lens can be used normally; at the same time, after power is turned on, check whether the heating plate 200 can operate normally so that the defogger and other functions can be realized after the mirror is assembled. Since the rhythm of color change of the ES lens is long after power is turned on, the lens 300 is continuously tested in the second stage to see whether the color can change normally, so as to avoid the influence of judgment due to too short detection time. By means of segmented detection, the reliability of detection is improved and the detection error is reduced. A blind spot module 120 is provided on the plastic back plate 100, and the blind spot module 120 needs to be used when powered on. The blind spot module 120 is used to remind the driver that there are obstacles around the car by means of light emission in situations such as changing lanes, but it cannot be seen in the rearview mirror, so as to improve driving safety. The third stage is used to detect whether the blind spot module 120 can be powered on and emit light normally to ensure that the lens assembly can be used normally. The first stage, the second stage and the third stage are respectively carried out at the seventh station 23, the eighth station 24 and the ninth station 25. After the power-on test, the lens assembly can be placed on the finished product rack 42 to complete the assembly of the lens assembly.

[0059] The method improves assembly efficiency and assembly quality by using automated assembly and laser welding, so that the lens assembly can be reliably assembled, alleviating the high cost and long delivery time caused by directly purchasing assembled lens assemblies, and helping to reduce costs and increase efficiency. It can be understood that the manipulator assembly, CCD camera and other structures in the method can select appropriate models according to needs, and their specific structures and setting positions are not limited here.

[0060] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A laser welding device for automatic mounting of rearview mirrors, used for assembling and welding lens components of rearview mirrors, characterized in that: include: Operating station (4); a first carrying platform (1) and a second carrying platform (2), wherein the first carrying platform (1) and the second carrying platform (2) are arranged at the periphery of two adjacent sides of the operating station (4), and the first carrying platform (1) and the second carrying platform (2) are used for assembling and laser welding the lens assembly, respectively; A welding mechanism, arranged on the second supporting platform (2), and used for laser welding the lens assembly; A raw material rack (41) and a finished product rack (42), wherein the raw material rack (41) and the finished product rack (42) are both arranged at the periphery of the operating station (4), the raw material rack (41) is arranged close to the first bearing platform (1), and the finished product rack (42) is arranged close to the second bearing platform (2).

2. The laser welding device for automatic mounting of rearview mirrors according to claim 1 is characterized in that: The first bearing platform (1) is provided with a bearing assembly, the bearing assembly comprising a bearing plate (141), a support member (142) and a connecting member (143), a pressure sensor (144) and an inflatable airbag (145), one end of the supporting member (142) is fixed, the pressure sensor (144) is arranged at the other end of the supporting member (142), the connecting member (143) connects the pressure sensor (144) and the bearing plate (141), the bearing plate (141) is used to bear the lens assembly, the cross-sectional area of ​​the connecting member (143) is smaller than the cross-sectional area of ​​the bearing plate (141), and the inflatable airbag (145) is arranged on a side of the bearing plate (141) away from the connecting member (143).

3. A laser welding method for automatic mounting of rearview mirrors, characterized in that: A laser welding device for automatic mounting of a rearview mirror as claimed in claim 1 or 2, wherein the lens assembly comprises a plastic back plate (100), a heating plate (200) and a lens (300), and the laser welding method for automatic mounting of a rearview mirror comprises the following steps: Plastic back plate processing, placing the plastic back plate (100) on the first carrier platform (1), and processing the surface of the side of the plastic back plate (100) away from the first carrier platform (1); Heating plate processing, tearing off the film of the heating plate (200) by means of a robot assembly, and attaching the heating plate (200) to a side of the plastic back plate (100) away from the first supporting platform (1); Lens processing, the robot assembly adsorbs the lens (300), locates the position of the plastic back plate (100) by using a CCD camera, aligns the lens (300) with the plastic back plate (100), and then attaches the lens (300) to a side of the heating plate (200) away from the plastic back plate (100); Laser welding is performed to laser weld the wiring harness (110) on the plastic back plate (100) and the conductive portion (310) on the lens (300), so that the wiring harness (110) and the lens (300) are electrically connected.

4. The laser welding method for automatic mounting of rearview mirrors according to claim 3, characterized in that: It also includes a pressure-maintaining process, which is performed after the lens processing, and presses the lens (300) through an inflated airbag (145) so that the lens (300) is attached to the plastic back plate (100).

5. The laser welding method for automatic mounting of rearview mirrors according to claim 4, characterized in that: The pressure-maintaining treatment further comprises: Pressure adjustment, the lens assembly is placed on a carrier plate (141), a side of the plastic back plate (100) away from the lens (300) is in contact with the carrier plate (141), the inflatable airbag (145) presses the lens (300), and the degree of contact between the lens (300) and the plastic back plate (100) is determined by the value displayed by the pressure sensor (144).

6. The laser welding method for automatic mounting of rearview mirrors according to claim 3, characterized in that: The method also includes quality inspection, which is performed after the laser welding, and the welding points are photographed by the CCD camera to determine the welding quality of the welding points.

7. The laser welding method for automatic mounting of rearview mirrors according to claim 6, characterized in that: It also includes a power-on test, which is arranged after the quality inspection, and connects the connector of the wiring harness (110) to a power source to test whether the lens assembly can be powered on.

8. The laser welding method for automatic mounting of rearview mirrors according to claim 3, characterized in that: It also includes the transfer of the lens assembly, which is arranged before the laser welding, and the lens assembly after bonding is transferred to the second supporting platform (2), so that the plastic back plate (100) is located above the lens (300).

9. The laser welding method for automatic mounting of rearview mirrors according to claim 3, characterized in that: The plastic back panel processing also includes: Laser coding: coding is performed on the plastic back plate (100) by laser processing to record processing information of the plastic back plate (100).

10. The laser welding method for automatic mounting of rearview mirrors according to claim 3, characterized in that: In the plastic back panel processing, the surface of the plastic back panel (100) is processed by plasma technology.

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