Lens self-cleaning structure, laser welding device and lens self-cleaning method

Abstract

The invention provides a lens self-cleaning structure, a laser welding device and a lens self-cleaning method.The lens self-cleaning structure comprises a protection lens and a driving assembly; the protection lens is rotatably arranged; the driving assembly is in driving connection with the protection lens and used for driving the protection lens to rotate so as to remove impurities on the protection lens through centrifugal force. Impurities on the protection lens are removed by effectively utilizing centrifugal force during rotation, so that the protection lens can be cleaned at any time, and the problem that the laser welding efficiency is reduced due to the fact that the protection lens of existing laser welding equipment needs to be manually cleaned after shutdown is solved; according to the rotating protection lens, the possibility that metal splashes to pollute the protection lens is reduced, the self-cleaning function of the protection lens is achieved, the frequency of stopping the laser welding device to wipe and maintain the protection lens is reduced subsequently, and then the overall welding production quality and efficiency can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of laser welding, and in particular to a lens self-cleaning structure, a laser welding device and a lens self-cleaning method. Background Art

[0002] As an advanced welding technology, laser welding has the advantages of fast speed, great depth and small deformation. With the development of science and technology, the application of laser welding technology in production has gradually become popular.

[0003] During the laser welding process, welding slag splashing usually occurs. In addition, there will be impurities such as dust and fiber in the air. The protective lenses on existing laser welding equipment are usually in a fixed state. During the laser welding process, welding slag, dust and other impurities will inevitably splash onto the protective lenses. Therefore, they need to be cleaned in time, otherwise the impurities will affect the welding laser emitted by the welding equipment, causing the laser energy to attenuate and resulting in poor welding.

[0004] The existing method for cleaning the protective lens usually relies on manual wiping to clean the protective lens. This method not only has low cleaning efficiency, but also requires the laser welding equipment to be shut down for cleaning, thereby reducing the overall welding efficiency of the laser welding process.

[0005] In addition, during the welding process, because the protective lens is fixed, the laser acting on an area of ​​the protective lens for a long time will cause local aging, and the transmittance of the aged area will decrease. As the aged area continues to absorb laser energy, the aged area will continue to deteriorate, and the energy of the laser passing through the area will further attenuate, reducing the welding quality; in severe cases, when the aged area ages to a certain extent due to energy absorption, the protective lens will break and fail.

[0006] Application Contents

[0007] The main purpose of the present application is to provide a lens self-cleaning structure, a laser welding device and a lens self-cleaning method to solve the problem that the protective lens of the existing laser welding equipment needs to be manually cleaned after shutdown, thereby reducing the welding efficiency.

[0008] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a lens self-cleaning structure is provided, including: a protective lens and a driving assembly; the protective lens is rotatably arranged; the driving assembly is drivingly connected to the protective lens, and is used to drive the protective lens to rotate so as to remove impurities on the protective lens by centrifugal force.

[0009] Furthermore, the protective lens has a first surface and a second surface parallel to each other, and the light enters from the first surface and exits from the second surface; the point where the light contacts the first surface when entering the first surface is the entry point, and the protective lens is rotated to change the position of the entry point on the first surface.

[0010] Furthermore, the protective lens rotates along the rotation axis; a straight line passing through the injection point and perpendicular to the first surface and the second surface is taken as the standard line; when the first surface and the second surface are both planes, the rotation axis is parallel to and spaced from the standard line; when the first surface and the second surface are both spherical surfaces, the rotation axis and the standard line both pass through the center of the spherical surface, and the rotation axis and the standard line do not coincide with each other.

[0011] Furthermore, the protective lens is a cylindrical plane mirror, the first surface and the second surface are respectively located at two ends of the cylindrical plane mirror, the light enters the first surface vertically and is emitted vertically from the second surface; when the standard line coincides with the central axis of the cylindrical plane mirror, the rotation axis is parallel to the central axis; when the standard line is parallel to the central axis, the rotation axis coincides with or is parallel to the central axis.

[0012] Furthermore, the lens self-cleaning structure also includes a bearing assembly, the protective lens is rotatably disposed on the bearing assembly, and the driving assembly is connected to the bearing assembly to drive the protective lens to rotate.

[0013] Furthermore, the bearing assembly includes a bearing plate, a mounting frame and a rotating bearing, the rotating bearing is arranged on the bearing plate, the mounting frame is arranged on the rotating bearing and is connected to the driving assembly; the protective lens is detachably arranged on the mounting frame to rotate with the mounting frame.

[0014] Furthermore, the protective lens is a cylindrical plane mirror, the central axis of the cylindrical plane mirror coincides with the rotation axis of the inner ring or outer ring of the rotating bearing; and / or the rotating bearing is a ball bearing or a roller bearing, the outer ring of the rotating bearing is fixedly set on the supporting plate, and the inner ring is connected to the mounting frame to support the mounting frame.

[0015] Furthermore, the driving assembly includes a driving motor and a belt transmission mechanism. The driving motor is arranged on the bearing plate and connected to the belt transmission mechanism. The belt transmission mechanism is connected to the mounting frame through a belt or a synchronous belt to drive the mounting frame to rotate.

[0016] Furthermore, the driving assembly includes a driving motor and a transmission gear. The driving motor is arranged on the bearing plate and connected to the transmission gear. The transmission gear meshes with gear teeth on the outer periphery of the mounting frame to drive the mounting frame to rotate.

[0017] Furthermore, the lens self-cleaning structure also includes a blowing component, the air outlet of the blowing component is arranged toward the protective lens, and the blowing component blows the protective lens by blowing air.

[0018] Furthermore, the lens self-cleaning structure also includes an image acquisition component, which is arranged toward the protective lens and is used to collect the degree of dirtiness and the location of dirtiness of the protective lens; the image acquisition component is electrically connected to the blowing component, and the blowing component adjusts the blowing direction of the air outlet accordingly according to the data of the degree of dirtiness and the location of dirtiness of the protective lens collected by the image acquisition component; and / or, the gas blown out by the blowing component is welding shielding gas.

[0019] Furthermore, the lens self-cleaning structure also includes a cleaning brush assembly, which includes a cleaning drive mechanism and a cleaning brush with a cleaning surface. The cleaning drive mechanism is connected to the cleaning brush and is used to drive the cleaning brush close to or away from the protective lens; when the cleaning brush abuts the protective lens, the cleaning drive mechanism drives the cleaning brush to reciprocate to clean the protective lens.

[0020] Furthermore, the cleaning brush assembly also includes an adsorption mechanism, which has an adsorption port arranged toward the cleaning brush and a negative pressure generator connected to the adsorption port, and the adsorption mechanism is used to adsorb impurities cleaned by the cleaning brush; and / or, the part of the cleaning brush used to abut against the protective lens includes at least one of non-woven fabric, flannel cloth, and a brush.

[0021] The present application also provides a laser welding device, which includes the above-mentioned lens self-cleaning structure. The laser welding device also includes a galvanometer assembly. The laser emitted by the galvanometer assembly passes through the protective lens to perform laser welding on the workpiece in the welding area.

[0022] The present application also provides a lens self-cleaning method, which is applied to the above-mentioned laser welding device; the lens self-cleaning method includes the following steps: driving the protective lens to rotate so as to remove impurities on the protective lens by centrifugal force; the point where the laser contacts the protective lens when it is shot into the protective lens is the shot point, and the protective lens is rotated to change the position of the shot point on the protective lens; based on the shape of the protective lens and the laser path required for welding, the protective lens is controlled to rotate without changing the laser path.

[0023] In this scheme, the present application provides a lens self-cleaning structure, including: a protective lens and a driving assembly; the protective lens is rotatably arranged; the driving assembly is drivingly connected to the protective lens, and is used to drive the protective lens to rotate so as to remove impurities on the protective lens through centrifugal force.

[0024] The present application sets a driving component to drive the protective lens to rotate, and effectively uses the centrifugal force during rotation to remove impurities on the protective lens, so that the protective lens can be cleaned at any time, which solves the problem that the protective lens of the existing laser welding equipment needs to be manually cleaned after shutdown, thereby reducing the laser welding efficiency; the rotating protective lens in the present application can shake off the welding slag and falling dust on its surface through centrifugal force, reducing the possibility of metal splashing and contaminating the protective lens, realizing the self-cleaning function of the protective lens, and subsequently reducing the frequency of stopping the laser welding device to wipe and maintain the protective lens, thereby improving the overall welding production quality and efficiency; at the same time, due to the temperature of the welding slag The protective lens has a relatively high heat release rate, and when too much welding slag is deposited on the protective lens, the protective lens may break due to excessive heat absorption. The present application effectively extends the service life of the protective lens and avoids the occurrence of safety hazards. Although the protective lens is a consumable in the production process, due to its high value, extending its service life can effectively reduce costs. In addition, the high-temperature welding slag is extremely difficult to clean after the surface of the protective lens is cooled, and improper cleaning may also damage the protective lens. The protective lens of the present application can be cleaned at any time through centrifugal force, and the uncooled welding slag can be cleaned in time, thereby avoiding the occurrence of the above situation. The present application has a simple structure and low cost, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0026] Figure 1 A schematic diagram of the external structure of a laser welding device provided by an embodiment of the present application is shown;

[0027] Figure 2 A schematic diagram of the internal structure of a laser welding device provided by an embodiment of the present application is shown;

[0028] Figure 3 A schematic diagram of the external structure of a lens self-cleaning structure provided by an embodiment of the present application is shown;

[0029] Figure 4 A schematic diagram of the internal structure of a lens self-cleaning structure provided by an embodiment of the present application is shown.

[0030] The above drawings include the following reference numerals:

[0031] 10. Protective lens; 11. First surface; 12. Second surface;

[0032] 20. driving assembly; 21. driving motor; 22. belt transmission mechanism; 23. belt;

[0033] 30. bearing assembly; 31. bearing plate; 32. mounting frame; 33. rotating bearing;

[0034] 40. Galvanometer assembly. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] like Figures 1 to 4 As shown, the present application provides a lens self-cleaning structure, including: a protective lens 10 and a driving assembly 20; the protective lens 10 is rotatably arranged; the driving assembly 20 is drivingly connected to the protective lens 10, and is used to drive the protective lens 10 to rotate so as to remove impurities on the protective lens 10 by centrifugal force.

[0037] The present application sets a driving component 20 to drive the protective lens 10 to rotate, and effectively uses the centrifugal force during rotation to remove impurities on the protective lens 10, so that the protective lens 10 can be cleaned at any time, thereby solving the problem that the protective lens 10 of the existing laser welding equipment needs to be manually cleaned after shutdown, thereby reducing the laser welding efficiency; the rotating protective lens 10 in the present application can shake off the welding slag and floating dust on its surface through centrifugal force, reducing the possibility of metal splashes contaminating the protective lens 10, realizing the self-cleaning function of the protective lens 10, and subsequently reducing the frequency of stopping the laser welding device to wipe and maintain the protective lens 10, thereby improving the overall welding production quality and efficiency; at the same time, due to the welding slag The temperature is high, and when too much welding slag is deposited on the protective lens 10, the protective lens 10 may absorb too much heat and cause the lens to break. The present application effectively extends the service life of the protective lens 10 and avoids the occurrence of safety hazards. Although the protective lens 10 is a consumable in the production process, due to its high value, extending its service life can effectively reduce costs. In addition, the high-temperature welding slag is extremely difficult to clean after the surface of the protective lens 10 is cooled, and improper cleaning may also cause the protective lens 10 to be damaged. The protective lens 10 of the present application can be cleaned at any time through centrifugal force, and the uncooled welding slag can be cleaned in time, so the above situation can be avoided. The present application has a simple structure and low cost, and is suitable for popularization and use.

[0038] In addition, it is worth mentioning that the laser welding process is a bottleneck process in battery production. The inevitable metal splashes will be adsorbed onto the protective lens 10. The welding equipment needs to be shut down during the lens cleaning process, which reduces production efficiency. The self-cleaning function of the protective lens 10 in the present application will extend the period requiring manual cleaning, thereby effectively improving the production efficiency of the battery.

[0039] like Figure 2 and Figure 4 As shown, the protective lens 10 has a first surface 11 and a second surface 12 parallel to each other. Light enters from the first surface 11 and exits from the second surface 12. The point where the light contacts the first surface 11 when entering the first surface 11 is the entry point. The protective lens 10 is rotated to change the position of the entry point on the first surface 11.

[0040] This arrangement allows the position of the injection point on the first surface 11 to change with rotation, thereby avoiding long-term contact between a partial area on the protective lens 10 and the laser, reducing the possibility of excessive absorption of laser energy by the local area, avoiding aging of the local area of ​​the protective lens 10, extending its service life, and improving welding quality.

[0041] The actual effect is that during the laser welding process, the surface temperature distribution of the protective lens 10 is more uniform, which reduces local overheating and aging, improves the welding quality and the stability of the equipment; the application scenario is in laser welding equipment, especially in welding production lines that require long-term continuous work, which can significantly reduce the replacement frequency of the protective lens 10 and reduce maintenance costs. The use process is that during the laser welding process, the driving component 20 drives the protective lens 10 to rotate, and the position of the laser injection point on the lens surface changes with the rotation, avoiding excessive temperature and aging in local areas.

[0042] Specifically, the protective lens 10 rotates along the rotation axis; a straight line passing through the injection point and perpendicular to the first surface 11 and the second surface 12 is taken as the standard line; when the first surface 11 and the second surface 12 are both planes, the rotation axis is parallel to the standard line and spaced apart; when the first surface 11 and the second surface 12 are both spherical surfaces, the rotation axis and the standard line both pass through the center of the spherical surface, and the rotation axis and the standard line do not coincide.

[0043] By setting the above-mentioned rotation axis and standard line, the original optical path of light will not be changed due to the rotation of the protective lens 10 when passing through the protective lens 10, thereby ensuring the accuracy of laser propagation during laser welding and ensuring that the laser welding accuracy is not affected by the rotation of the protective lens 10.

[0044] The principle of the above design is to ensure that the propagation path of the laser is not affected by accurately controlling the relationship between the rotation axis of the protective lens 10 and the laser entry point, while using rotation to remove impurities; the implementation effect is that while the protective lens 10 rotates to remove impurities, the accuracy and effect of laser welding are not affected, achieving dual guarantees of self-cleaning and welding quality; the application scenario is in high-precision laser welding equipment, especially on production lines with strict requirements on welding accuracy.

[0045] like Figure 2 and Figure 4 As shown, the protective lens 10 is a cylindrical plane mirror, the first surface 11 and the second surface 12 are respectively located at the two ends of the cylindrical plane mirror, and the light enters the first surface 11 vertically and is emitted vertically from the second surface 12; when the standard line coincides with the central axis of the cylindrical plane mirror, the rotation axis is parallel to the central axis; when the standard line is parallel to the central axis, the rotation axis coincides with or is parallel to the central axis.

[0046] By setting the protective lens 10 as a cylindrical plane mirror, the structure of the protective lens 10 is simplified, which is convenient for installation and procurement; by setting the relationship among the standard line, the central axis of the cylindrical plane mirror and the rotation axis, the protective lens 10 has the following advantages: 1. It can rotate by itself to clean impurities; 2. The position of the incident point on the first surface 11 changes during rotation, thereby avoiding aging caused by local long-term light transmission; 3. The propagation of light is not adversely affected by the rotating protective lens 10, thereby ensuring welding accuracy.

[0047] In another specific embodiment of the present application, the shape and type of the protective lens 10 are mainly determined according to its application scenarios and the requirements of the laser equipment. In addition to the cylindrical plane mirror, as long as the first surface 11 and the second surface 12 are parallel to each other, and the light enters the first surface 11 vertically and exits from the second surface 12 vertically, the protective lens 10 can also adopt the following structures: 1. Cylindrical coated lens; 2. Prismatic plane mirror: that is, the first surface 11 and the second surface 12 can be rectangular or other square shapes. The purpose of this design is to match the mechanical structure or working area of ​​the laser welding equipment, for example, "rectangular high-transmittance laser protective mirror" and "square infrared laser protective mirror"; 3. Elliptical lens: In some specific laser system layouts, elliptical lenses can save more space, such as "elliptical laser protective mirror".

[0048] like Figure 1 , Figure 2 and Figure 4 As shown, the lens self-cleaning structure further includes a bearing assembly 30 , the protective lens 10 is rotatably disposed on the bearing assembly 30 , and the driving assembly 20 is connected to the bearing assembly 30 to drive the protective lens 10 to rotate.

[0049] The protective lens 10 is supported by the bearing assembly 30 and connected to the driving assembly 20 to ensure the stability and safety of the protective lens 10 during high-speed rotation. The implementation effect is that the protective lens 10 can rotate stably during the self-cleaning process, avoiding the laser path deviation caused by unstable rotation, and improving the welding quality and reliability of the equipment.

[0050] like Figure 3 and Figure 4 As shown, the bearing assembly 30 includes a bearing plate 31, a mounting frame 32 and a rotating bearing 33. The rotating bearing 33 is arranged on the bearing plate 31, and the mounting frame 32 is arranged on the rotating bearing 33 and is connected to the driving assembly 20; the protective lens 10 is detachably arranged on the mounting frame 32 to rotate with the mounting frame 32.

[0051] The rotating bearing 33 is used to reduce friction during rotation and improve rotation efficiency. At the same time, the protective lens 10 can be detachably installed through the mounting frame 32, which is convenient for replacement and maintenance of the lens. The above design makes the protective lens 10 rotate more smoothly during the self-cleaning process, and is convenient for replacement and maintenance of the lens, thereby improving the operating efficiency and maintenance convenience of the equipment.

[0052] The usage process is to install the protective lens 10 on the mounting frame 32 before laser welding to ensure that it cooperates with the rotating bearing 33, and then start the driving assembly 20 to make the mounting frame 32 drive the protective lens 10 to rotate under the support of the rotating bearing 33 for self-cleaning and subsequent laser welding.

[0053] like Figure 3 and Figure 4 As shown, the protective lens 10 is a cylindrical plane mirror, the central axis of the cylindrical plane mirror coincides with the rotation axis of the inner ring or outer ring of the rotating bearing 33; and / or, the rotating bearing 33 is a ball bearing or a roller bearing, the outer ring of the rotating bearing 33 is fixedly set on the supporting plate 31, and the inner ring is connected to the mounting frame 32 to support the mounting frame 32.

[0054] The structural characteristics of the cylindrical plane mirror and the low friction characteristics of the ball bearing or roller bearing are utilized to ensure the stability and efficiency of the protective lens 10 during high-speed rotation. The above design makes the protective lens 10 rotate more stably and efficiently during the self-cleaning process, while reducing energy loss during the rotation process and improving the operating efficiency of the equipment.

[0055] The use process is to install the protective lens 10 of the cylindrical plane mirror on the rotating bearing 33 before laser welding, ensure that the axis thereof coincides with or is parallel to the rotating axis, and then start the driving assembly 20 to make the protective lens 10 rotate stably under the support of the ball bearing or roller bearing for self-cleaning and laser welding.

[0056] It is worth noting that: in mechanical equipment, ball bearings and roller bearings that reduce rotational resistance are two common types of rolling bearings. They reduce friction and support the rotation of the shaft by rolling the rolling body (ball or roller) between the inner and outer rings. In a specific embodiment of the present application, the ball bearings or roller bearings that can be used for the rotating bearing 33 are as follows: 1. Deep Groove Ball Bearing, which is characterized by circular grooves on the inner and outer rings, and the ball rolls in the grooves, which can withstand radial loads and bidirectional axial loads; it has low friction, good precision and a long service life; 2. Angular Contact Ball Bearing, which is characterized by the raceways of the inner and outer rings having an angle relative to the bearing axis, which can withstand large axial loads and radial loads, while providing high rotational accuracy; 3. Thrust Ball Bearing, which is characterized by being specially designed to withstand axial loads but not radial loads, and is usually composed of two washers and a ball; 3. Self-aligning Ball Bearing 4. Cylindrical Roller Bearing, whose characteristic is that the outer ring raceway is spherical, which can automatically adjust the angle deviation to a certain extent, and is suitable for asymmetric or slight swing of the shaft; 5. Tapered Roller Bearing, whose characteristic is that the roller is cylindrical, which can bear high radial load, but the axial load capacity is low; 6. Tapered Roller Bearing, whose characteristic is that the roller is conical, which can bear large radial and axial loads, and allows slight deviation of the shaft. Application: Used in situations where heavy loads or combined loads are required; 6. Needle Roller Bearings: Its characteristic is that the rollers are slender cylinders, which can provide higher load-bearing capacity in a limited space; 7. Self-aligning Roller Bearings: Its characteristic is that it has a self-aligning function, can bear radial loads and smaller axial loads, and allows slight deflection of the shaft; 8. Thrust Roller Bearings: Its characteristic is that it is specially used to bear axial loads, and the rollers are cylindrical or conical; 9. Solid Roller Bearings: Its characteristic is that the rollers are densely arranged, providing extremely high load-bearing capacity.

[0057] The common features of the ball bearings and roller bearings selected in the above embodiments are low friction, high load capacity and long service life; they both reduce friction by rolling the rollers between the inner and outer rings, thereby reducing the rotational resistance; in actual use, the choice of bearing depends on the specific application requirements, including load type, size restrictions, precision requirements, speed and working environment.

[0058] like Figure 2 , Figure 3 and Figure 4 As shown, the driving assembly 20 includes a driving motor 21 and a belt transmission mechanism 22. The driving motor 21 is arranged on a supporting plate 31 and connected to the belt transmission mechanism 22. The belt transmission mechanism 22 is connected to the mounting frame 32 through a belt 23 or a synchronous belt to drive the mounting frame 32 to rotate.

[0059] The driving motor 21 provides power, which is transmitted to the mounting frame 32 through the belt transmission mechanism 22 to drive the protective lens 10 to rotate and achieve self-cleaning. The above design makes the rotation of the protective lens 10 smoother, while reducing the complexity and cost of the equipment and improving the operating efficiency and reliability of the equipment.

[0060] The actual use process is: start the driving motor 21, drive the mounting frame 32 through the belt 23 or the synchronous belt, so that the protective lens 10 rotates smoothly, and performs self-cleaning and laser welding.

[0061] Optionally, the driving assembly 20 includes a driving motor 21 and a transmission gear. The driving motor 21 is disposed on the supporting plate 31 and connected to the transmission gear. The transmission gear meshes with gear teeth on the outer periphery of the mounting frame 32 to drive the mounting frame 32 to rotate.

[0062] The driving motor 21 provides power, and the transmission gear meshes with the gear teeth on the mounting frame 32 to directly drive the protective lens 10 to rotate, thereby achieving self-cleaning. This arrangement makes the rotation of the protective lens 10 more direct and efficient, while improving the accuracy of power transmission, and improving the operating efficiency and welding accuracy of the equipment.

[0063] The actual use process is that before laser welding, the driving motor 21 is started, and the mounting frame 32 is driven through the transmission gear to make the protective lens 10 rotate with high precision to perform self-cleaning and laser welding.

[0064] Optionally, the lens self-cleaning structure further includes a blowing component, the air outlet of the blowing component is arranged toward the protective lens 10, and the blowing component blows the protective lens 10 by blowing air.

[0065] By providing a blowing assembly, the blown airflow can disperse impurities such as dust that may be attached to the protective lens 10, further reducing the possibility of the protective lens 10 being contaminated, improving the cleanliness of the protective lens 10, and thus improving the quality of welding.

[0066] In a specific embodiment of the present application, the air outlet of the blowing assembly can also be directed toward the laser welding area. As a result, the welding slag generated by the welding will change its original spattering trajectory under the action of the airflow, causing the welding slag to move in a direction away from the protective lens 10, thereby reducing the possibility of the welding slag splashing to the protective lens 10 and the galvanometer assembly 40 and causing contamination, thereby avoiding the laser beam emitted by the galvanometer assembly 40 being blocked by the welding slag on the protective lens 10, thereby causing the problem of insufficient welding energy, thereby improving the welding quality and welding reliability.

[0067] In combination with the above embodiments, the blowing assembly can block welding slag and provide a certain degree of cleaning for the galvanometer assembly 40 and the protective lens 10 during laser welding. There is no need to frequently stop welding work and rely on manual cleaning of the protective lens 10, thereby reducing the possibility of the protective lens 10 being damaged and requiring replacement due to improper cleaning, effectively reducing consumables costs and labor costs, and improving welding production efficiency.

[0068] Specifically, the lens self-cleaning structure also includes an image acquisition component, which is arranged toward the protective lens 10 and is used to collect the degree of dirtiness and the location of dirtiness of the protective lens 10; the image acquisition component is electrically connected to the blowing component, and the blowing component adjusts the blowing direction of the air outlet accordingly according to the data of the degree of dirtiness and the location of dirtiness of the protective lens 10 collected by the image acquisition component; and / or, the gas blown out by the blowing component is welding shielding gas.

[0069] By setting an image acquisition component to capture the degree of dirtiness and the location of dirtiness on the protective lens 10, combined with a specific algorithm and intelligent equipment, the degree of dirtiness of the protective lens 10 can be automatically detected, thereby determining whether the protective lens 10 needs to be cleaned, thereby eliminating the need for frequent manual inspections, and further reducing labor costs; in addition, since the image acquisition component can confirm the location of dirtiness through the acquired images, the air blowing cleaning component can clean the protective lens 10 in a targeted manner, resulting in better cleaning effects and higher cleaning efficiency.

[0070] In a specific embodiment of the present application, the welding shielding gas can isolate the welding area from the external environment during the laser welding process, prevent adverse reactions such as oxidation and nitridation, and at the same time reduce spatter, stabilize the welding process, and improve the quality of the weld; the welding shielding gases that can be selected in this application include: 1. Argon (Ar), which is one of the most commonly used shielding gases because it is an inert gas that can effectively prevent metal oxidation during welding. Argon is suitable for welding a variety of metals, including stainless steel, aluminum, copper, etc., and performs particularly well in high-precision welding and deep-penetration welding; 2. Nitrogen (Nitrogen, N 2 ), Nitrogen is used in certain specific metal welding, such as welding certain types of steel, it can prevent the oxidation of the weld and reduce spatter during welding; Of course, nitrogen is not suitable for all metals, because some metals will react with nitrogen at high temperatures to form nitrides, affecting the quality of the weld; 3. Helium (Helium, He), Helium is also an inert gas, similar to argon, but in some applications, helium has better thermal conductivity, can help cool the weld and reduce the heat affected zone. Helium is suitable for welding thin-walled materials and applications with high thermal conductivity requirements; 4. Argon-Helium Mixture, which combines the advantages of argon and helium, can provide better welding protection and cooling effects, and is suitable for welding applications that require highly controlled cooling speeds, such as welding titanium alloys, aluminum alloys, etc.; 5. Argon-Nitrogen Mixture, in certain specific welding applications, argon-nitrogen mixtures can provide better welding quality and stability, especially when welding certain types of steel; 6. Carbon Dioxide (Carbon Dioxide, CO 2 ), although carbon dioxide is not a typical shielding gas, in some laser melting welding (Laser Metal Deposition, LMD) processes, carbon dioxide gas can be used to stabilize the arc or control the oxidation process.

[0071] Of course, the specific selection of the shielding gas in the above embodiments is usually determined based on the properties of the material being welded, welding requirements (such as weld quality, welding speed, spatter control, etc.) and the specific configuration of the laser welding equipment.

[0072] Optionally, the lens self-cleaning structure also includes a cleaning brush assembly, which includes a cleaning drive mechanism and a cleaning brush with a cleaning surface. The cleaning drive mechanism is connected to the cleaning brush and is used to drive the cleaning brush closer to or away from the protective lens 10; when the cleaning brush abuts the protective lens 10, the cleaning drive mechanism drives the cleaning brush to reciprocate to clean the protective lens 10.

[0073] Through the reciprocating motion of the cleaning brush assembly, impurities on the surface of the protective lens 10 are directly contacted and removed, thereby achieving deep cleaning. The above design allows the surface impurities of the protective lens 10 to be removed more thoroughly during the self-cleaning process, thereby improving the light transmittance of the lens and the accuracy of laser welding.

[0074] The actual use process is: before laser welding or after shutdown, start the cleaning drive mechanism, make the cleaning brush close to the protective lens 10, and perform reciprocating motion to deeply remove surface impurities.

[0075] Specifically, the cleaning brush assembly also includes an adsorption mechanism, which has an adsorption port arranged toward the cleaning brush and a negative pressure generator connected to the adsorption port, and the adsorption mechanism is used to adsorb impurities cleaned by the cleaning brush; and / or, the part of the cleaning brush used to abut against the protective lens 10 includes at least one of non-woven fabric, flannel cloth, and a brush.

[0076] By setting up the adsorption mechanism, the dirt, impurities, etc. generated by the protective lens 10 during the cleaning process can be sucked in through the adsorption port of the adsorption mechanism and discharged in time, reducing the possibility of dirt continuing to remain on the surface of the protective lens 10 or the cleaning brush, avoiding secondary contamination of the protective lens 10, and further improving the cleaning effect.

[0077] By providing a cleaning brush that is used to contact the protective lens 10 and includes at least one of non-woven fabric, flannel cloth, and a brush, cleaning brushes with different cleaning degrees can be selected according to different situations. While improving the cleaning effect of the protective lens 10, it can also reduce the damage such as scratches on the surface of the protective lens 10 caused by the cleaning brush, thereby improving the cleaning quality.

[0078] like Figure 1 and Figure 2 As shown, the present application also provides a laser welding device, which includes the above-mentioned lens self-cleaning structure. The laser welding device also includes a galvanometer assembly 40. The laser emitted by the galvanometer assembly 40 passes through the protective lens 10 to perform laser welding on the workpiece in the welding area.

[0079] The laser welding device proposed in the present application can emit a high-energy-density laser beam, thereby welding the parts of the workpiece to be welded by heat conduction. The overall laser welding has a fast welding speed and high precision.

[0080] The present application integrates the lens self-cleaning structure into the laser welding device, emits laser through the galvanometer assembly 40, and the protective lens 10 ensures the laser transmittance and welding accuracy while self-cleaning; the above design makes the laser welding device have a significant self-cleaning effect on the protective lens 10 during the welding process, and the accuracy and efficiency of laser welding are not affected, thereby improving the automation level and production efficiency of the equipment. In actual use, the laser welding device is started, the galvanometer assembly 40 emits laser, and the protective lens 10 performs laser welding while rotating and self-cleaning.

[0081] Specifically, the present application also provides a lens self-cleaning method, which is applied to the above-mentioned laser welding device; the lens self-cleaning method includes the following steps: driving the protective lens 10 to rotate so as to remove impurities on the protective lens 10 by centrifugal force; when the laser is shot into the protective lens 10, the point where the laser contacts the protective lens 10 is the shot point, and the protective lens 10 is rotated to change the position of the shot point on the protective lens 10; based on the shape of the protective lens 10 and the laser path required for welding, the protective lens 10 is controlled to rotate without changing the laser path.

[0082] The above method controls the rotation of the protective lens 10 and utilizes centrifugal force to remove impurities while ensuring the accuracy of the laser path; the design of the above steps enables the protective lens 10 to have a significant self-cleaning effect during the laser welding process without affecting the welding accuracy, thereby improving the welding quality and the working reliability of the equipment.

[0083] Now the specific working process and principle of this application are described in detail as follows:

[0084] like Figures 1 to 4 As shown, the present application uses a driving motor 21 (for example, a high-speed motor with an integrated deceleration mechanism) to drive the mounting frame 32 and the protective lens 10 to rotate at high speed through a belt transmission mechanism 22 (for example, a pulley), and the mounting frame 32 reduces friction by rotating the bearing 33; during the laser welding process, the splashing welding slag contacts the protective lens 10 and is quickly separated by the centrifugal force, thereby avoiding dirt on the protective lens 10, reducing the cleaning frequency of the protective lens 10, improving the welding quality, and extending the service life of the protective lens 10; in addition, by rotating the protective lens 10, the position of the injection point on the first surface 11 can be changed, thereby avoiding long-term contact between a partial area on the protective lens 10 and the laser, thereby reducing the possibility of excessive absorption of laser energy by the local area, avoiding aging of the local area of ​​the protective lens 10, and extending its service life.

[0085] During specific use, the rotation speed and direction of the protective lens 10 can be adjusted according to the needs of laser welding; for example, the rotation speed range can be set at 100-2000 rpm to ensure that the centrifugal force can effectively remove impurities while avoiding mechanical wear caused by excessive rotation.

[0086] The air volume and air pressure of the blowing component are also adjustable, and the parameter range can be set within an air volume of 0.1-10 cubic meters per minute and an air pressure of 0.1-1 MPa to meet different cleaning requirements and avoid damage to the protective lens 10.

[0087] The contact pressure between the cleaning brush and the protective lens 10 is also one of the key parameters. The contact pressure can be adjusted within the range of 0.1-10N, ensuring that the cleaning brush can effectively clean the protective lenses 10 without damaging the lens surface due to excessive pressure.

[0088] Through the above design, the lens self-cleaning structure of the present application effectively utilizes the centrifugal force during rotation, the auxiliary cleaning of the blowing assembly and the cleaning brush assembly, realizes the automatic cleaning of the protective lens 10, and avoids the inconvenience caused by manual cleaning and the impact on welding efficiency. This structure not only reduces the possibility of metal splash contamination and extends the service life of the lens, but also improves the welding quality and production efficiency, reduces maintenance costs, and improves the reliability and safety of the equipment. The lens self-cleaning structure and method of the present application have a simple structure and low cost, are suitable for wide application in laser welding equipment, and have significant benefits for improving the automation level and production efficiency of laser welding equipment.

[0089] In specific applications, the lens self-cleaning structure can be flexibly adjusted to meet the needs of different laser welding scenarios. For example, for high-precision laser welding, the rotation speed of the protective lens 10 can be set in a higher range to more effectively remove impurities; the material of the cleaning brush can be made of more delicate non-woven fabric or flannel to reduce the risk of scratches on the lens surface; the air volume and air pressure of the blowing component can be optimized and adjusted according to the size of the lens and the cleaning requirements, ensuring the cleaning effect while avoiding energy waste.

[0090] In addition, the lens self-cleaning structure can also be integrated with intelligent control equipment to automatically adjust cleaning parameters such as the contact pressure of the cleaning brush, the air volume and air pressure of the blowing component, and the rotation speed and direction of the protective lens 10 according to the real-time feedback of the dirtiness and position data from the image acquisition component, thereby realizing an intelligent and efficient cleaning process. This intelligent control not only improves the cleaning effect, but also further reduces the maintenance cost and operation complexity of the equipment, providing strong support for the automation and intelligence of laser welding equipment.

[0091] In the laser welding device, the integrated design of the lens self-cleaning structure makes the laser welding process unnecessary to stop frequently for manual cleaning, improving production continuity and efficiency. At the same time, the auxiliary cleaning of the cleaning brush and the blowing component ensures the continuous cleaning of the lens under high-load working environment, which is crucial to maintaining the quality of laser welding.

[0092] In summary, the lens self-cleaning structure and method proposed in this application realizes effective automatic cleaning of the protective lens 10 through the integrated drive component 20, blowing component, cleaning brush component and image acquisition component, which not only improves the automation level and production efficiency of the laser welding equipment, but also reduces the maintenance cost and improves the reliability and safety of the equipment, and has broad application prospects and significant technical advantages. In practical applications, the specific design and parameter adjustment of these components should be carried out according to the actual needs of the laser welding equipment and the characteristics of the lens.

[0093] In summary, the present application provides a lens self-cleaning structure, a laser welding device and a lens self-cleaning method; the present application sets a driving component 20 to drive the protective lens 10 to rotate, and effectively uses the centrifugal force during rotation to remove impurities on the protective lens 10, so that the protective lens 10 can be cleaned at any time, thereby solving the problem that the protective lens 10 of the existing laser welding equipment needs to be manually cleaned after shutdown, thereby reducing the laser welding efficiency; the rotating protective lens 10 in the present application can use centrifugal force to shake off the welding slag and falling dust on its surface, reducing the possibility of metal splashing to contaminate the protective lens 10, realizing the self-cleaning function of the protective lens 10, and subsequently reducing the frequency of stopping the laser welding device to wipe and maintain the protective lens 10, thereby improving the overall The welding production quality and efficiency are improved; at the same time, due to the high temperature of the welding slag, when too much welding slag is deposited on the protective lens 10, the protective lens 10 may absorb too much heat and cause the lens to break. The present application effectively extends the service life of the protective lens 10 and avoids the occurrence of safety hazards; although the protective lens 10 is a consumable in the production process, due to its high value, extending its service life can effectively reduce costs; in addition, the high-temperature welding slag is extremely difficult to clean after the surface of the protective lens 10 is cooled, and improper cleaning may also cause the protective lens 10 to be damaged. The protective lens 10 of the present application can be cleaned at any time through centrifugal force, and the uncooled welding slag can be cleaned in time, so the above situation can be avoided; the present application has a simple structure and low cost, and is suitable for popularization and use.

[0094] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0095] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0096] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0097] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0098] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0099] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A lens self-cleaning structure, characterized in that: include: A protective lens (10) and a driving assembly (20); the protective lens (10) is rotatably arranged; the driving assembly (20) is drivingly connected to the protective lens (10) and is used to drive the protective lens (10) to rotate so as to remove impurities on the protective lens (10) by centrifugal force.

2. The lens self-cleaning structure according to claim 1, characterized in that: The protective lens (10) has a first surface (11) and a second surface (12) which are parallel to each other. Light enters from the first surface (11) and exits from the second surface (12). When the light enters the first surface (11), the point where the light contacts the first surface (11) is the incident point. The protective lens (10) is rotated so that the position of the incident point on the first surface (11) changes.

3. The lens self-cleaning structure according to claim 2, characterized in that: The protective lens (10) rotates along a rotation axis; a straight line passing through the incident point and perpendicular to the first surface (11) and the second surface (12) is used as a standard line; When the first surface (11) and the second surface (12) are both planes, the rotation axis is parallel to and spaced from the standard line; When the first surface (11) and the second surface (12) are both spherical surfaces, the rotation axis and the standard line both pass through the center of the spherical surface, and the rotation axis and the standard line do not coincide with each other.

4. The lens self-cleaning structure according to claim 3, characterized in that: The protective lens (10) is a cylindrical plane mirror, the first surface (11) and the second surface (12) are respectively located at two ends of the cylindrical plane mirror, and light is vertically incident on the first surface (11) and vertically emitted from the second surface (12); when the standard line coincides with the central axis of the cylindrical plane mirror, the rotation axis is parallel to and spaced from the central axis; when the standard line is parallel to and spaced from the central axis, the rotation axis coincides with or is parallel to and spaced from the central axis.

5. The lens self-cleaning structure according to claim 1, characterized in that: The lens self-cleaning structure further comprises a bearing assembly (30), the protective lens (10) is rotatably arranged on the bearing assembly (30), and the driving assembly (20) is connected to the bearing assembly (30) to drive the protective lens (10) to rotate.

6. The lens self-cleaning structure according to claim 5, characterized in that: The bearing assembly (30) comprises a bearing plate (31), a mounting frame (32) and a rotating bearing (33); the rotating bearing (33) is arranged on the bearing plate (31); the mounting frame (32) is arranged on the rotating bearing (33) and is connected to the driving assembly (20); the protective lens (10) is detachably arranged on the mounting frame (32) so as to rotate along with the mounting frame (32).

7. The lens self-cleaning structure according to claim 6, characterized in that: The protective lens (10) is a cylindrical plane mirror, the center axis of the cylindrical plane mirror coincides with the rotation axis of the inner ring or the outer ring of the rotating bearing (33); and / or the rotating bearing (33) is a ball bearing or a roller bearing, the outer ring of the rotating bearing (33) is fixedly arranged on the supporting plate (31), and the inner ring is connected to the mounting frame (32) to support the mounting frame (32).

8. The lens self-cleaning structure according to claim 6, characterized in that: The driving assembly (20) comprises a driving motor (21) and a belt transmission mechanism (22); the driving motor (21) is arranged on the bearing plate (31) and connected to the belt transmission mechanism (22); the belt transmission mechanism (22) is connected to the mounting frame (32) via a belt (23) or a synchronous belt to drive the mounting frame (32) to rotate.

9. The lens self-cleaning structure according to claim 6, characterized in that: The driving assembly (20) comprises a driving motor (21) and a transmission gear, wherein the driving motor (21) is arranged on the bearing plate (31) and connected to the transmission gear, and the transmission gear meshes with gear teeth on the outer periphery of the mounting frame (32) to drive the mounting frame (32) to rotate.

10. The lens self-cleaning structure according to claim 1, characterized in that: The lens self-cleaning structure also includes a blowing component, the air outlet of the blowing component is arranged toward the protective lens (10), and the blowing component blows the protective lens (10) by blowing air.

11. The lens self-cleaning structure according to claim 10, characterized in that: The lens self-cleaning structure further comprises an image acquisition component, the image acquisition component being arranged toward the protective lens (10) and being used to acquire the degree of dirtiness and the dirtiness position of the protective lens (10); the image acquisition component being electrically connected to the blowing component, the blowing component correspondingly adjusting the blowing direction of the air outlet according to the data of the degree of dirtiness and the dirtiness position of the protective lens (10) acquired by the image acquisition component; And / or, the gas blown out by the blowing assembly is welding shielding gas.

12. The lens self-cleaning structure according to claim 1, characterized in that: The lens self-cleaning structure also includes a cleaning brush assembly, which includes a cleaning drive mechanism and a cleaning brush having a cleaning surface. The cleaning drive mechanism is connected to the cleaning brush and is used to drive the cleaning brush to approach or move away from the protective lens (10). When the cleaning brush abuts against the protective lens (10), the cleaning drive mechanism drives the cleaning brush to reciprocate to clean the protective lens (10).

13. The lens self-cleaning structure according to claim 12, characterized in that: The cleaning brush assembly further comprises an adsorption mechanism, wherein the adsorption mechanism comprises an adsorption port disposed toward the cleaning brush and a negative pressure generator connected to the adsorption port. for absorbing impurities cleaned by the cleaning brush; and / or, the portion of the cleaning brush used to contact the protective lens (10) includes at least one of non-woven fabric, flannel, and a brush.

14. A laser welding device, characterized in that: The laser welding device comprises the lens self-cleaning structure described in any one of claims 1 to 13, and further comprises a galvanometer assembly (40), wherein the laser emitted by the galvanometer assembly (40) passes through the protective lens (10) to perform laser welding on the workpiece in the welding area.

15. A lens self-cleaning method, characterized in that: The lens self-cleaning method is applied to the laser welding device according to claim 14; the lens self-cleaning method comprises the following steps: driving the protective lens (10) to rotate so as to remove impurities on the protective lens (10) by centrifugal force; When the laser is incident on the protective lens (10), the point where the laser contacts the protective lens (10) is the incident point, and the protective lens (10) is rotated so that the position of the incident point on the protective lens (10) changes; Based on the shape of the protective lens (10) and the laser path required during welding, the protective lens (10) is controlled to rotate without changing the laser path.

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