Mounting device of laser welding device, laser welding system and using method of laser welding system

Abstract

The embodiment of the invention provides a mounting device of a laser welding device, a laser welding system and a using method of the laser welding system, and relates to the technical field of laser welding. The mounting device comprises a base, a moving assembly, a mounting piece, a controller and a clamping assembly. Wherein the moving assembly is arranged on the base. The mounting piece is connected with the moving assembly. The controller is arranged on the base, the controller is in communication connection with the moving assembly, and the controller controls the moving assembly to move so as to drive the mounting piece to move. The clamping assembly comprises a first clamping piece and a second clamping piece, the first clamping piece and the second clamping piece are both connected with the mounting piece, the distance between the first clamping piece and the second clamping piece is adjustable, and the first clamping piece, the second clamping piece and the mounting piece are used for jointly clamping the laser welding device. According to the mounting device, under the condition that the wire feeding speed of the laser welding device is increased, the base, the moving assembly and the mounting piece can still stably support the laser welding device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of laser welding, in particular to a mounting device of a laser welding device, a laser welding system and a use method thereof. BACKGROUND

[0002] The vehicle body of a rail vehicle is usually formed by welding a plurality of parts through a laser welding device.

[0003] In the related art, the laser welding device is usually held by an operator for welding.

[0004] However, in some scenarios, it is necessary to increase the wire feeding speed of the laser welding device, which will increase the reaction force of the laser welding device on the operator's hand, making it difficult for the operator to hold the laser welding device steadily. SUMMARY

[0005] The mounting device of the laser welding device, the laser welding system and the use method thereof provided by the embodiments of the present application can still stably support the laser welding device when the wire feeding speed of the laser welding device is increased.

[0006] In a first aspect, the mounting device of the laser welding device provided by the embodiments of the present application comprises a base, a moving assembly, a mounting piece, a controller and a clamping assembly. The moving assembly is arranged on the base. The mounting piece is connected with the moving assembly. The controller is arranged on the base and is in communication connection with the moving assembly. The controller controls the moving assembly to move, so as to drive the mounting piece to move. The clamping assembly comprises a first clamping piece and a second clamping piece. Both the first clamping piece and the second clamping piece are connected with the mounting piece. The distance between the first clamping piece and the second clamping piece is adjustable. The first clamping piece, the second clamping piece and the mounting piece are used to jointly clamp the laser welding device.

[0007] In some possible implementation manners, the mounting device of the laser welding device further comprises at least one first connecting piece. The mounting piece has at least one strip-shaped hole, which extends along the direction in which the first clamping piece faces the second clamping piece. The first clamping piece has at least one first connecting hole. The first connecting hole, the strip-shaped hole and the first connecting piece are in one-to-one correspondence. The first connecting piece is sequentially inserted into the corresponding first connecting hole and strip-shaped hole, so as to connect the first clamping piece with the mounting piece.

[0008] In some possible implementation manners, the number of strip-shaped holes is two or more. Each strip-shaped hole is arranged at intervals along the extension direction of the first clamping piece.

[0009] In some possible implementation manners, the first clamping member comprises a first connecting segment, a first clamping segment and a second connecting segment. The first connecting segment is connected with the mounting member. The first clamping segment is connected with the first connecting segment, and the first clamping segment is provided with a first clamping hole for accommodating the laser welding device. The second connecting segment is connected with one end of the first clamping segment away from the first connecting segment, and the second connecting segment is connected with the mounting member.

[0010] In some possible implementation manners, the mounting device of the laser welding device further comprises at least one second connecting member. The mounting member is provided with at least one mounting hole. The second clamping member is provided with at least one second connecting hole, the second connecting hole, the mounting hole and the second connecting member are in one-to-one correspondence, and the second connecting member is sequentially inserted into the corresponding second connecting hole and the mounting hole to connect the second clamping member and the mounting member. The second clamping member is further provided with a second clamping hole for accommodating the laser welding device.

[0011] In some possible implementation manners, the mounting device of the laser welding device further comprises a protection member, and the protection member comprises a fixing segment, a first protection segment and a second protection segment. The fixing segment is connected with the mounting member. The first protection segment is connected with the fixing segment, and the first protection segment is used for extending to one side of a trigger switch of the laser welding device. The second protection segment is connected with the first protection segment, and the second protection segment is used for extending to one side of the laser welding device away from the mounting member.

[0012] In a second aspect, the embodiments of the present application provide a laser welding system, comprising the mounting device of the laser welding device provided in the first aspect and the laser welding device connected with the mounting device.

[0013] In a third aspect, the embodiments of the present application provide a method for using the laser welding system, comprising:

[0014] determining a first safety point, an out-light point, at least one intermediate transition point, an off-light point and a second safety point of the laser welding device;

[0015] controlling the laser welding device to move along the first safety point, the out-light point, the at least one intermediate transition point, the off-light point and the second safety point in sequence;

[0016] determining that a path of the laser welding device moving from the first safety point to the second safety point is a teaching path;

[0017] controlling a moving assembly of the mounting device to move along the teaching path to drive the laser welding device to move along the teaching path, and controlling the laser welding device to operate.

[0018] In some possible implementation manners, the controlling the laser welding device to move along the first safety point, the out-light point, the at least one intermediate transition point, the off-light point and the second safety point in sequence comprises:

[0019] control the laser welding device to move along the first safety point to the light-out point;

[0020] control the laser welding device to move along the light-out point, at least one intermediate transition point and the light-off point in sequence in a preset motion state, the preset motion state comprising at least one of a straight motion state, a circular motion state and a whole circle motion state;

[0021] control the laser welding device to move along the light-off point to the second safety point.

[0022] In some possible implementation manners, before the method of using the laser welding system controls the moving assembly of the mounting device to move along the teaching path to drive the laser welding device to move along the teaching path, and controls the laser welding device to operate, the method further comprises:

[0023] control the laser beam of the laser welding device to periodically swing in a direction perpendicular to the welding direction.

[0024] The mounting device of the laser welding device provided by the embodiment of the present application can bear the weight of the moving assembly, the mounting member and the laser welding device. When the laser welding device performs the wire feeding operation, the welding wire will generate a large reaction force on the laser welding device, and the reaction force is finally transmitted to the base through the clamping assembly, the mounting member and the moving assembly. Since the base has sufficient mass and stability, it can effectively absorb and disperse these reaction forces, thereby avoiding the reaction forces from causing large vibrations or displacements of the entire mounting device. In this way, even under the working condition of high-speed wire feeding, the base, the moving assembly and the mounting member can still stably support the laser welding device, ensuring the stability of the welding process.

[0025] In addition, by adjusting the distance between the first clamping member and the second clamping member, laser welding devices of different lengths can be firmly clamped and fixed on the mounting member, so that the same set of mounting device can be compatible with laser welding devices of multiple specifications, meet the needs of different welding scenes, and improve the versatility and use flexibility of the mounting device. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and serve to explain the principles of the present application together with the specification.

[0027] Figure 1 a structural schematic diagram of a laser welding system provided by an embodiment of the present application;

[0028] Figure 2 another structural schematic diagram of a laser welding system provided by an embodiment of the present application;

[0029] Figure 3A flowchart of a method for using the laser welding system provided by the embodiments of the present application.

[0030] Explanation of reference numerals:

[0031] 10, mounting device; 20, laser welding device;

[0032] 100, base;

[0033] 200, moving assembly;

[0034] 300, mounting piece; 310, bar-shaped hole;

[0035] 400, controller;

[0036] 500, clamping assembly; 510, first clamping piece; 511, first connecting hole; 512, first connecting section; 513, first clamping section; 514, second connecting section; 515, first clamping hole; 520, second clamping piece; 521, second connecting hole; 522, second clamping hole;

[0037] 600, moving walking mechanism;

[0038] 700, protective piece; 710, fixed section; 720, first protective section; 730, second protective section.

[0039] For the purpose of facilitating the understanding of the schemes of the embodiments of the present application, the spline curves and arrows used in the reference numerals in the drawings are explained as follows: the components indicated by the spline curves without arrows can be solid components, i.e. components with solid structures; the components indicated by the spline curves with arrows can be virtual components, i.e. components without solid structures; in some cases, the components indicated by the spline curves with arrows can also be assembly bodies with solid structures or virtual structures.

[0040] The specific embodiments of the present application have been shown by the above drawings, and will be described in more detail hereinafter. The drawings and the written description are not intended to limit the scope of the present application in any way, but to illustrate the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0041] For the purpose of making the objects, technical schemes and advantages of the embodiments of the present application more clear, the technical schemes of the embodiments of the present application will be described clearly and completely by referring to the drawings of the embodiments of the present application.

[0042] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. In the description of embodiments of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, if any, indicate directions in the drawings to which reference is made and depict the orientation of the present application, and are not to be construed as limiting the present application thereto. Moreover, the terms "including", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises a" does not exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element. The features of the present application and the embodiments thereof can be combined with each other, if not in conflict, and are within the scope of the present application.

[0043] Figure 1 A structural schematic diagram of a laser welding system provided by embodiments of the present application.

[0044] The laser welding system provided by embodiments of the present application can be applied to the fields of vehicle technology, aerospace technology, medical instrument technology, etc. When the laser welding system is applied to the field of vehicle technology, it can be specifically applied to the fields of rail vehicle technology, passenger car technology, commercial vehicle technology, engineering machinery vehicle technology, etc.

[0045] In some examples, the rail vehicle includes a vehicle body including a chassis floor and a chassis side beam, and the laser welding system can weld the chassis floor and the chassis side beam.

[0046] Of course, in addition to being able to weld the chassis floor and the chassis side beam, the laser welding system can also weld side walls, end walls, doors, etc. of the vehicle body in other examples.

[0047] Of course, in addition to being able to weld the vehicle body of the rail vehicle, the laser welding system can also weld other parts other than the vehicle body, such as bogies, interior structures, etc. in other examples.

[0048] As Figure 1As shown, the embodiment of the present application provides a laser welding system, which comprises a mounting device 10 of a laser welding device 20 and the laser welding device 20 connected with the mounting device 10. Wherein, the mounting device 10 can support the laser welding device 20 and be used for controlling the laser welding device 20 to move, so that the laser welding device 20 can move along a certain path. The laser welding device 20 is used for emitting a laser beam to realize welding.

[0049] Wherein, by adopting the laser welding device 20, compared with the traditional arc welding device, the deformation amount of the workpiece to be welded can be reduced, and the adjustment and repair amount can be reduced. Moreover, the operation process difficulty of the operator can be reduced, the weld forming is good, the consistency is good, and the stability is good.

[0050] In some embodiments, the laser welding device 20 can be a handheld laser welding device 20, which is originally designed for the operator to hold and operate. After being connected with the mounting device 10, the welding process can be realized without or with less manual participation, which not only retains the flexibility of the handheld laser welding device 20, but also solves the problem of insufficient stability during handheld operation. Moreover, compared with the weight and volume of the traditional laser head, the handheld laser welding device 20 is relatively light, and has small floor space and high flexibility.

[0051] Alternatively, in other embodiments, the laser welding device 20 can be a fiber laser welding device 20, which has the characteristics of good beam quality and high energy density, and can realize high-quality welding effect when used with the mounting device 10.

[0052] In some embodiments, the laser welding device 20 can comprise a wire feeding mechanism, which is used for feeding welding wire to the welding area. When the wire feeding speed increases, the reaction force generated by the wire feeding mechanism also increases. By supporting and fixing the mounting device 10, the influence of the reaction force on the welding stability can be effectively offset.

[0053] In some embodiments, the laser welding device 20 can comprise a protective gas supply device, which is used for providing protective gas to the welding area to prevent oxidation during the welding process. When used with the mounting device 10, the welding quality can be ensured. Exemplarily, the protective gas can be carbon dioxide or the like.

[0054] At present, the car body of the rail vehicle is usually formed by welding a plurality of parts by a welding device.

[0055] In the related art, the laser welding device is usually held by the operator for welding.

[0056] However, in some scenarios, such as when there is a gap between the workpieces to be welded, it is necessary to increase the wire feeding speed of the laser welding device, but this will cause the reaction force of the welding wire on the laser welding device to increase. Since the operator only holds the laser welding device with hand power, when the reaction force increases, the operator has difficulty in continuously and stably controlling the position and posture of the laser welding device, and hand shaking or laser welding device position deviation is prone to occur. This not only affects the accuracy of the welding path, causing the weld quality to decline, but also increases the labor intensity of the operator and reduces work efficiency.

[0057] Figure 2 Another structural schematic diagram of a laser welding system provided by an embodiment of the present application.

[0058] Therefore, as shown in Figure 1 and 2 An installation device 10 of a laser welding device 20 is provided by an embodiment of the present application, which includes a base 100, a moving assembly 200, a mounting piece 300, a controller 400 and a clamping assembly 500. The moving assembly 200 is arranged on the base 100. The mounting piece 300 is connected with the moving assembly 200. The controller 400 is arranged on the base 100, and the controller 400 is in communication connection with the moving assembly 200. The controller 400 controls the moving assembly 200 to move, so as to drive the mounting piece 300 to move. The clamping assembly 500 includes a first clamping piece 510 and a second clamping piece 520. The first clamping piece 510 and the second clamping piece 520 are both connected with the mounting piece 300. The distance between the first clamping piece 510 and the second clamping piece 520 is adjustable. The first clamping piece 510, the second clamping piece 520 and the mounting piece 300 are used to jointly clamp the laser welding device 20.

[0059] In the embodiment of the present application, the base 100 serves as the basic support structure of the entire installation device 10, and can bear the weight of the moving assembly 200, the mounting piece 300 and the laser welding device 20. When the laser welding device 20 performs wire feeding operation, a relatively large reaction force will be generated on the laser welding device 20 by the welding wire. This reaction force is finally transmitted to the base 100 through the clamping assembly 500, the mounting piece 300 and the moving assembly 200. Since the base 100 has sufficient mass and stability, it can effectively absorb and disperse these reaction forces, thereby avoiding the situation that the reaction force causes the entire installation device 10 to generate relatively large vibration or displacement. In this way, even under the working condition of high-speed wire feeding, the base 100, the moving assembly 200 and the mounting piece 300 can still stably support the laser welding device 20, ensuring the stability of the welding process.

[0060] The movable component 200 is mounted on the base 100 and connected to the mounting component 300. The controller 400 is communicatively connected to the movable component 200 and can control its movement. When welding is required, the controller 400 can send control commands according to a preset welding path, driving the movable component 200 to move along a specific trajectory, thereby causing the mounting component 300 and the laser welding device 20 fixed on the mounting component 300 to move along the preset welding path. This configuration eliminates the instability of manual hand operation and achieves higher path accuracy and repeatability, ensuring that the welding device can accurately weld along the predetermined welding path and improving the consistency of welding quality.

[0061] Furthermore, the clamping assembly 500 includes a first clamping member 510 and a second clamping member 520, both of which are connected to the mounting member 300, and the distance between the first clamping member 510 and the second clamping member 520 is adjustable. This adjustable clamping structure allows the clamping assembly 500 to adapt to laser welding devices 20 of different sizes and specifications. Since laser welding devices 20 of different lengths or specifications typically have different focal length characteristics, in practical applications, it is necessary to select a suitable laser welding device 20 according to the specific welding scenario. By adjusting the distance between the first clamping member 510 and the second clamping member 520, laser welding devices 20 of different lengths can be firmly clamped and fixed on the mounting member 300, thereby enabling the same mounting device 10 to be compatible with multiple specifications of laser welding devices 20, meeting the needs of different welding scenarios, and improving the versatility and flexibility of use of the mounting device 10. Meanwhile, the first clamping member 510, the second clamping member 520, and the mounting member 300 work together to form a multi-point clamping structure, which can more evenly distribute the force transmitted by the laser welding device 20, further enhancing the stability and reliability of the clamping.

[0062] In some embodiments, the base 100 may be made of metal materials such as cast iron or steel to provide sufficient mass and rigidity.

[0063] In some embodiments, the base 100 may be in the shape of a rectangular plate, an I-shaped structure, or a frame structure.

[0064] In some embodiments, the mounting component 300 may be a plate-like structure, a frame structure, or an arm-like structure, etc.

[0065] In some embodiments, the material of the mounting component 300 may be aluminum alloy, steel, etc.

[0066] In some embodiments, the controller 400 may be a programmable logic controller, an industrial computer, or a dedicated motion controller. The communication connection between the controller 400 and the moving component 200 can be achieved via wired means such as Ethernet, fieldbus, or dedicated control cables, or via wireless means such as WiFi or Bluetooth.

[0067] The industrial computer and programmable logic controller integrate a graphical interface and automated path planning algorithm, which can realize rapid trajectory planning of the installation device 10, and can also start, pause and terminate the welding program, thereby realizing the welding of the workpiece to be welded.

[0068] In some embodiments, the mounting device 10 may further include components such as a protective cover, a cooling component, an auxiliary lighting device, and an operation and interface display system. The protective cover, cooling component, auxiliary lighting device, and operation and interface display system may all be mounted on the base 100.

[0069] In some embodiments, the mounting device 10 may further include a moving mechanism 600, which may be connected to the base 100 and enable the base 100 to move to the vicinity of the workpiece to be welded. Exemplarily, the moving mechanism 600 may be a roller mechanism or a tracked moving mechanism, etc.

[0070] When the mobile walking mechanism 600 is a tracked mobile mechanism, the movement of the mounting device 10 is stable and reliable, and it can carry various loads. It also has a low center of gravity, a large ground contact area, and good ground contact ratio and climbing ability.

[0071] For example, the mobile walking mechanism 600 can be driven by an independent DC electric drive, which allows the mounting device 10 to be installed in any workshop area, enabling rapid deployment of the entire device for production conversion.

[0072] In some possible implementations, the mounting device 10 may also include an adjustment component, which may be an electric push rod, a cylinder or a hydraulic cylinder, etc. The adjustment component may be mounted on the mounting member 300, and the adjustment section of the adjustment component may be connected to the first clamping member 510. The adjustment component may drive the first clamping member 510 to move toward or away from the second clamping member 520 to adjust the distance between the first clamping member 510 and the second clamping member 520.

[0073] Alternatively, in some other possible implementations, the mounting device 10 may further include at least one first connector (not shown in the figure). For example... Figure 2As shown, the mounting member 300 has at least one strip hole 310, which extends along the first clamping member 510 toward the second clamping member 520. The first clamping member 510 has at least one first connecting hole 511, and the first connecting hole 511, the strip hole 310 and the first connector correspond one-to-one. The first connector is sequentially inserted into the corresponding first connecting hole 511 and the strip hole 310 to connect the first clamping member 510 and the mounting member 300.

[0074] By providing a strip hole 310 on the mounting member 300, the strip hole 310 extends along the direction of the first clamping member 510 toward the second clamping member 520, so that the first connecting member can slide and adjust in this direction within the strip hole 310, thereby realizing the position adjustment of the first clamping member 510 relative to the mounting member 300.

[0075] When it is necessary to clamp laser welding devices 20 of different lengths or specifications, the operator can loosen the first connector and adjust the position of the first clamping member 510 along the extension direction of the strip hole 310 so that the distance between the first clamping member 510 and the second clamping member 520 matches the size of the laser welding device 20 to be clamped. After the adjustment is completed, the first connector can be tightened to achieve reliable fixation.

[0076] Because the structure of the strip hole 310 is simple, the position adjustment function can be realized simply by opening a long strip through hole on the mounting part 300. There is no need to set up a complex adjustment mechanism or precision transmission components, thereby reducing the manufacturing cost and maintenance cost of the position adjustment of the first clamping part 510.

[0077] In some embodiments, the shape of the slot 310 can be rectangular, oblong, etc. The long side of the rectangular slot 310 extends along the direction from the first clamping member 510 toward the second clamping member 520, and the width of the rectangular slot is slightly larger than the diameter of the first connecting member. The oblong slot 310 has semi-circular ends and a rectangular middle section.

[0078] In some embodiments, the first connector can be a bolt and nut mating part. After the bolt passes through the first connecting hole 511 and the strip hole 310 in sequence, it is tightened by the nut. The position can be adjusted by loosening the nut.

[0079] Alternatively, in other embodiments, the first connector can also be a quick-release pin. After the quick-release pin is inserted into the first connecting hole 511 and the strip hole 310, it can be quickly fixed and released by the locking mechanism on the pin shaft, thereby improving the adjustment efficiency.

[0080] In some embodiments, the length of the strip hole 310 can be designed according to the length range of the laser welding device 20 that needs to be clamped, so as to ensure that the size variation range of commonly used laser welding devices 20 can be covered.

[0081] In some embodiments, scale markings may be provided on the inner wall of the strip hole 310 to facilitate operators to quickly adjust the position of the first clamping member 510 according to the specific dimensions of the laser welding device 20, thereby improving the accuracy and efficiency of adjustment.

[0082] In some embodiments, when there is only one slot 310 and one first connector, one end of the first clamping member 510 can be fixedly connected to the mounting member 300 via the first connector, and the other end of the first clamping member 510 can be hooked onto the edge of the mounting member 300, that is, the other end of the first clamping member 510 can cover two or three surfaces of the edge of the mounting member 300. This configuration can reduce the number of first connectors, thereby reducing connection costs and connection difficulty.

[0083] In some possible implementations, the number of strip holes 310 is two or more, and each strip hole 310 is spaced apart along the extension direction of the first clamping member 510.

[0084] When the first clamping member 510 is connected to the mounting member 300 through the first connector, if only a single strip hole 310 and a single first connector are provided, the first clamping member 510 may rotate or swing around the single first connector as the axis, which will result in the connection between the first clamping member 510 and the mounting member 300 being not stable enough, thereby affecting the clamping stability of the laser welding device 20.

[0085] By providing two or more slotted holes 310, and arranging them at intervals along the extension direction of the first clamping member 510, and correspondingly configuring two or more first connecting members to be inserted into the corresponding first connecting holes 511 and slotted holes 310, multiple connection points can be formed at different positions of the first clamping member 510. These spaced connection points can effectively limit the rotation or swaying of the first clamping member 510 relative to the mounting member 300, thereby improving the stability of the connection between the first clamping member 510 and the mounting member 300.

[0086] When the connection between the first clamping member 510 and the mounting member 300 is more secure, the clamping force of the first clamping member 510 on the laser welding device 20 can be applied more evenly and continuously, avoiding fluctuations in clamping force or shifts in clamping position caused by unstable connection, thereby improving the stability of clamping the laser welding device 20 and ensuring that the laser welding device 20 can maintain a stable welding posture under conditions such as high-speed wire feeding.

[0087] In some embodiments, when the number of strip holes 310 is two or more, at least one strip hole 310 can be provided on both sides of the laser welding device 20 along the extending direction of the first clamping member 510. Thus, the first clamping member 510 can clamp and fix the laser welding device 20 on both sides.

[0088] In some embodiments, the lengths of the various slots 310 may be the same or different.

[0089] In some embodiments, the shape of the strip hole 310 can be straight, arc-shaped, etc.

[0090] In some possible implementations, such as Figure 2 As shown, the first clamping member 510 includes a first connecting section 512, a first clamping section 513, and a second connecting section 514. The first connecting section 512 is connected to the mounting member 300. The first clamping section 513 is connected to the first connecting section 512 and has a first clamping hole 515 for accommodating the laser welding device 20. The second connecting section 514 is connected to the end of the first clamping section 513 opposite to the first connecting section 512, and the second connecting section 514 is also connected to the mounting member 300.

[0091] By connecting the first connecting segment 512 and the second connecting segment 514 to the mounting member 300 respectively, the first clamping member 510 is connected to the mounting member 300 at two positions, thereby forming a two-point support structure, which can improve the stability of the connection between the first clamping member 510 and the mounting member 300.

[0092] When the laser welding device 20 generates a large reaction force during high-speed wire feeding, the reaction force is transmitted to the first clamping section 513, and then from the first clamping section 513 to the first connecting section 512 and the second connecting section 514 respectively. Finally, the two connecting sections jointly bear and transmit the force to the mounting component 300. This can effectively disperse the force and prevent the first clamping component 510 from shaking or displacing.

[0093] Meanwhile, the first clamping section 513 is located between the first connecting section 512 and the second connecting section 514, forming a stable three-section structure. This structure allows the first clamping section 513 to effectively resist bending moment through the constraint formed by the first connecting section 512 and the second connecting section 514 when subjected to a lateral force perpendicular to its extension direction, thereby ensuring that the laser welding device 20 remains stable within the first clamping hole 515.

[0094] In some embodiments, the first clamping section 513 may bypass the location of the laser welding device 20 used for replacing the protective lens and the focusing lens.

[0095] In some embodiments, a first connecting hole 511 may be provided on both the first connecting segment 512 and the second connecting segment 514.

[0096] In some embodiments, the shape of the first clamping hole 515 can be a regular shape such as a circle, ellipse, or U-shape, or it can be an irregular shape. It is understood that the shape of the first clamping hole 515 can match the shape of the laser welding device 20.

[0097] In some embodiments, the first connecting segment 512 and the second connecting segment 514 can form an integral structure with the first clamping segment 513, or they can be connected separately by welding or bolting. The integral structure can improve the overall rigidity, while the separate connection structure is easier to maintain and replace.

[0098] In some possible implementations, the mounting device 10 further includes at least one second connector (not shown in the figure). The mounting member 300 has at least one mounting hole (not shown in the figure). Figure 2 As shown, the second clamping member 520 has at least one second connecting hole 521. The second connecting hole 521, the mounting hole, and the second connector correspond one-to-one. The second connector is sequentially inserted into the corresponding second connecting hole 521 and the mounting hole to connect the second clamping member 520 and the mounting member 300. The second clamping member 520 also has a second clamping hole 522, which is used to accommodate the laser welding device 20.

[0099] By sequentially inserting the second connector into the second connecting hole 521 and the mounting hole, a reliable connection is achieved between the second clamping member 520 and the mounting member 300. As a result, the second clamping member 520 can be firmly fixed on the mounting member 300, so that the second clamping member 520 will not loosen or shift due to the reaction force generated by the welding device during the operation of the laser welding device 20.

[0100] The second clamping hole 522 on the second clamping member 520 can accommodate the laser welding device 20, so that one end of the laser welding device 20 is effectively constrained by the second clamping hole 522. Together with the first clamping member 510, the laser welding device 20 is clamped at both ends. This arrangement ensures that the laser welding device 20 will not shake or shift during operation, thereby ensuring the accuracy of the welding path and the stability of the welding quality.

[0101] In some embodiments, the second connector may be a fastener such as a bolt, screw, or pin.

[0102] In some embodiments, the mounting hole may be configured as a through hole or a threaded hole, etc.

[0103] In some embodiments, the number of second connecting holes 521 can be set to two or more. When two second connecting holes 521 are provided, the structure is simple and can meet the basic fixing requirements. When three or more second connecting holes 521 are provided, the stability and torsional resistance of the connection can be further improved.

[0104] In some embodiments, the shape of the second clamping hole 522 can be a regular shape such as a circle, ellipse, or U-shape, or it can be an irregular shape. It is understood that the shape of the second clamping hole 522 can match the shape of the laser welding device 20.

[0105] In some embodiments, a buffer layer may be provided on the inner wall of the second clamping hole 522. The buffer layer can absorb the vibration generated during the welding process and reduce the wear on the housing of the laser welding device 20.

[0106] In some embodiments, the second clamping member 520 may be a one-piece molded structure or a modular assembly structure.

[0107] In some possible implementations, such as Figure 2 As shown, the mounting device 10 also includes a protective member 700, which includes a fixing section 710, a first protective section 720, and a second protective section 730. The fixing section 710 is connected to the mounting member 300. The first protective section 720 is connected to the fixing section 710 and extends to one side of the trigger switch of the laser welding device 20. The second protective section 730 is connected to the first protective section 720 and extends to the side of the laser welding device 20 opposite to the mounting member 300.

[0108] By providing a protective element 700 on the mounting device 10, when the laser welding device 20 is fixed to the mounting device 300 by the clamping assembly 500, the first protective section 720 can extend to one side of the trigger switch to form a physical barrier. Thus, even if the operator or other objects approach the laser welding device 20 during equipment debugging, device handling, teaching, or welding, the first protective section 720 can effectively prevent them from directly contacting the trigger switch, avoiding the accidental start or stop of the laser welding device 20 due to accidental trigger switch contact, thereby improving the safety and controllability of the welding operation.

[0109] Meanwhile, the second protective section 730 extends to the side of the laser welding device 20 away from the mounting component 300, which can limit and constrain the side of the laser welding device 20. When the laser welding device 20 moves and welds under the drive of the moving component 200, the second protective section 730 can limit the swing amplitude of the laser welding device 20, preventing it from deviating or shaking excessively due to inertia or external force, thereby ensuring that the laser welding device 20 maintains a stable posture and position during the welding process, and thus ensuring the accuracy of the welding path and the stability of the weld quality.

[0110] In some embodiments, the first protective section 720 may be in the form of a flat plate, an arc-shaped plate, a frame, etc.

[0111] In some embodiments, the fixed section 710 can be connected to the mounting component 300 by a detachable connection method such as bolt connection or snap-fit, which facilitates the disassembly and installation of the protective component 700.

[0112] In some embodiments, the first protective section 720 and the fixed section 710 may be arranged vertically, which allows the first protective section 720 to extend more directly to the trigger switch position. Alternatively, in other embodiments, the first protective section 720 and the fixed section 710 may be arranged at an angle, which can be adjusted according to the specific position of the trigger switch.

[0113] In some embodiments, the second protective section 730 and the first protective section 720 may be bent. The bending arrangement enables the second protective section 730 to better adapt to the spatial layout of the laser welding device 20 and achieve an effective limiting function within a limited space.

[0114] In some possible implementations, the moving component 200 can be a six-axis robotic arm. A six-axis robotic arm allows for a wider range of motion and rotation angles in the laser welding device 20, thus expanding the applicability of the installation device 10. It is understood that a six-axis robotic arm is an existing structural design in the art, and will not be elaborated upon here.

[0115] Of course, in addition to being a six-axis robotic arm, the mobile component 200 can also be a four-axis robotic arm, a five-axis robotic arm, or a robotic arm with more axes in other possible implementations.

[0116] In some embodiments, a six-axis robotic arm can also be called a six-axis collaborative robot. Each joint of the six-axis collaborative robot has a built-in torque sensor, offering good deployment flexibility, safety, reliability, and ease of use.

[0117] Figure 3 This is a schematic flowchart illustrating a method of using the laser welding system provided in an embodiment of this application.

[0118] like Figure 3 As shown in the figure, this application provides a method for using a laser welding system, including:

[0119] S100, determine the first safety point, the light-emitting point, at least one intermediate transition point, the light-off point, and the second safety point of the laser welding device 20.

[0120] Before the laser welding system begins operation, several key points need to be determined during the welding process. Specifically, the first safety point is the initial standby position of the laser welding device 20 before welding begins. This position is far from the workpiece to be welded, ensuring that the laser welding device 20 will not interfere with the workpiece or surrounding equipment. The laser beam emission point is the starting position where the laser welding device 20 begins emitting the laser beam for welding; this position corresponds to the beginning of the weld seam. Intermediate transition points refer to several path nodes that the laser welding device 20 needs to traverse during the welding process; these nodes, when connected, form a complete welding trajectory. The laser beam deactivation point is the position where the laser welding device 20 stops emitting the laser beam; this position corresponds to the end of the weld seam. The second safety point is the final stopping position of the laser welding device 20 after welding is completed, also far from the workpiece to avoid interference. Determining these points provides fundamental data for subsequent path planning.

[0121] In some embodiments, the first safety point and the second safety point can be the same location, that is, the laser welding device 20 returns to the initial standby position after completing the welding. This setting simplifies path planning and facilitates the laser welding device 20 to perform cyclic operations.

[0122] In some embodiments, the number of intermediate transition points can be adjusted according to the complexity of the welding path. For simple straight welds, no intermediate transition points or only a few intermediate transition points may be set; for complex curved welds or spatial welds, multiple intermediate transition points may be set to ensure the accuracy of the path.

[0123] In some embodiments, the number of intermediate transition points can also be determined based on the number of obstacles. For example, obstacles may be protrusions on the workpiece to be welded, and the number of intermediate transition points may be equal to or greater than the number of protrusions.

[0124] In some embodiments, the inspection can be performed manually by visual inspection, or the image of the workpiece to be welded can be acquired by an image acquisition component (e.g., a camera) and then the controller 400 can identify the image to determine the workpiece.

[0125] S200, control the laser welding device 20 to move sequentially along the first safety point, the light output point, at least one intermediate transition point, the light off point, and the second safety point.

[0126] After determining the various positions, the laser welding device 20 is guided sequentially through the first safety point, the light emission point, at least one intermediate transition point, the light off point, and the second safety point. During this process, the operator can directly drag the laser welding device 20 or control the moving component 200 via the controller 400 to move the mounting component 300 and the laser welding device 20. The controller 400 can record the spatial coordinates of the laser welding device 20 at each position. These two teaching methods ensure that the movement path of the laser welding device 20 conforms to the actual welding requirements and can be flexibly adjusted according to the specific shape of the workpiece and welding requirements.

[0127] In some embodiments, a recording button may be provided on the mounting device 10, and the recording button is communicatively connected to the controller 400. When the laser welding device 20 reaches each position point, the recording button can be pressed to allow the controller 400 to record the position data of the position point.

[0128] S300, The path along which the laser welding device 20 moves from the first safety point to the second safety point is determined as the teaching path.

[0129] The complete movement trajectory of the laser welding device 20 from the first safety point to the second safety point is defined as the teaching path. This teaching path includes all the position points and movement trajectories that the laser welding device 20 needs to pass through during the welding process, and serves as the reference path for subsequent automatic welding. The controller 400 stores all the position information and motion parameters of the teaching path in its memory, forming a repeatable welding program. The establishment of the teaching path enables the laser welding system to repeatedly perform the same welding operations in subsequent mass production, thereby ensuring the consistency of welding quality.

[0130] In some embodiments, the controller 400 may optimize the teaching path, for example, by smoothing the path to eliminate sharp corners, or by optimizing the movement speed to improve welding efficiency, thereby shortening the welding time while ensuring welding quality.

[0131] In some embodiments, the controller 400 can set the welding speed, laser welding process parameters, and whether tool coordinate system Z-axis offset is required in the teaching path, and can execute, pause, and reset the program after generating the program. The tool coordinate system Z-axis offset can adjust the defocusing amount during laser welding.

[0132] S400, the moving component 200 of the control mounting device 10 moves along the teaching path to drive the laser welding device 20 to move along the teaching path and control the operation of the laser welding device 20.

[0133] After establishing the teaching path, the controller 400 retrieves the stored path information and controls the moving component 200 to move along the trajectory of the teaching path, thereby driving the laser welding device 20 to move along the preset path. Simultaneously, the controller 400 also controls the laser welding device 20 to start welding when it reaches the light emission point and to stop welding when it reaches the light deactivation point. The entire process achieves automated laser welding operation, eliminating the need for continuous manual control by operators and improving welding efficiency and stability.

[0134] In some embodiments, as the laser welding device 20 moves along the taught path, the controller 400 can monitor the position and orientation of the laser welding device 20 in real time and make fine adjustments according to the actual situation to compensate for path deviations caused by factors such as workpiece clamping errors or thermal deformation, thereby further improving welding accuracy.

[0135] In some embodiments, multiple teaching paths can be established for different workpieces to be welded and stored in the controller 400. Operators can select the appropriate teaching path for welding according to actual needs.

[0136] In this embodiment, by determining a first safety point and a second safety point, the laser welding device 20 is positioned far from the workpiece before and after welding, reducing the probability of collision between the laser welding device 20 and the workpiece or surrounding equipment, thereby protecting the safety of the laser welding system and the workpiece. By determining the laser beam exit point and the laser beam exit point, the laser welding device 20 can accurately control the start and end positions of the welding, ensuring that the length and position of the weld meet the design requirements and avoiding welding defects caused by premature laser beam exit or delayed laser beam exit. By setting intermediate transition points, the complex welding path can be decomposed into multiple simple path segments, allowing the laser welding device 20 to move smoothly along a predetermined trajectory, ensuring the accuracy of the welding trajectory.

[0137] By establishing welding paths through a teaching method, operators do not need to program the device manually. Furthermore, operators can flexibly adjust the path according to the actual workpiece shape and welding requirements, enabling the laser welding system to adapt to different welding scenarios and workpiece types, thus improving the system's versatility and flexibility. By storing the teaching path in the controller 400, the laser welding system can repeatedly perform the same welding operations in subsequent production without requiring manual teaching each time, significantly improving production efficiency while ensuring consistent welding quality in mass production.

[0138] Because the laser welding device 20 moves via the moving component 200 of the mounting device 10, the base 100 can effectively withstand the reaction force generated during the welding process, avoiding the problem of operators having difficulty holding the welding machine stably due to the increased reaction force. The controller 400 controls the movement of the moving component 200, which in turn moves the mounting component 300 and the laser welding device 20 for welding, reducing the operator's labor intensity, avoiding fatigue caused by prolonged hand-held welding, and improving work safety and comfort.

[0139] In some possible implementations, step S200 may include:

[0140] S210, control the laser welding device 20 to move along the first safety point to the light output point.

[0141] The laser welding device 20 can be moved from the first safety point to the light emission point by the moving component 200, either manually or by the controller 400. During the movement from the first safety point to the light emission point, the laser welding device 20 is in a closed state and does not emit a laser beam. The moving component 200 accurately positions the laser welding device 20 to the light emission point at an appropriate speed, preparing for subsequent welding operations.

[0142] In some embodiments, the moving speed from the first safety point to the light emission point can be adjusted according to actual needs. For example, the moving speed can be reduced when approaching the light emission point to improve positioning accuracy, or the moving speed can be increased when moving away from the workpiece to shorten non-welding time.

[0143] S220, control the laser welding device 20 to move sequentially along the light emission point, at least one intermediate transition point and the light off point in a preset motion state, the preset motion state including at least one of linear motion state, circular motion state and full circle motion state.

[0144] During the teaching process, the laser welding device 20 does not emit a laser beam after reaching the emission point. The laser welding device 20 can move along the welding path in a preset motion state under the control of a human or the controller 400. The preset motion state may include at least one of linear motion, circular motion, and full-circle motion.

[0145] The linear motion mode is suitable for welding straight welds, where the moving component 200 drives the laser welding device 20 to move at a constant speed along a straight trajectory. The circular motion mode is suitable for welding circular welds, where the moving component 200 drives the laser welding device 20 to move along a circular trajectory, and the radius and center position of the arc are determined according to the actual weld shape. The full-circle motion mode is suitable for welding closed annular welds, where the moving component 200 drives the laser welding device 20 to move along a complete circular trajectory.

[0146] In some embodiments, the radius of the arc in the arc motion state can be adjusted according to the curvature of the actual weld to adapt to arc-shaped welds with different curvatures.

[0147] In some embodiments, the circular trajectory of the full-circle motion state can be a perfect circle or an ellipse to accommodate annular welds of different shapes.

[0148] In some embodiments, the preset motion states of the laser welding device 20 in each of the multiple sub-paths from one point to the next can be the same or different.

[0149] In some embodiments, the controller 400 can record the preset motion state of the laser welding device 20 in each sub-path to facilitate the determination of the teaching path.

[0150] In some embodiments, when the preset motion state is a full circular motion state, the light-emitting point may coincide with the light-off point.

[0151] In some embodiments, when the preset motion state is a full circular motion state, some intermediate transition points may coincide.

[0152] S230, control the laser welding device 20 to move along the off point to the second safety point.

[0153] During the demonstration process, the laser welding device 20 does not need to be switched off at the switch-off point, and the laser welding device 20 can be moved from the switch-off point to the second safety point by a person or the controller 400. The second safety point is the withdrawal position of the laser welding device 20 after completing the welding operation. This position is also far away from the workpiece to ensure the safe withdrawal of the laser welding device 20 from the welding area.

[0154] In some embodiments, the movement path from the light-off point to the second safety point may be the same as or different from the movement path from the first safety point to the light-out point, and may be optimized according to the actual workspace layout and production process requirements.

[0155] In some embodiments, the second safety point may be at the same location as the first safety point, so that the laser welding device 20 returns to the initial standby position after welding is completed, which is convenient for the next welding operation.

[0156] Therefore, in this embodiment of the application, by controlling the movement trajectory of the laser welding device 20 through preset motion state, it is possible to adapt to the requirements of weld seams of different shapes.

[0157] In some possible implementations, prior to step S400, the method of using the laser welding system further includes:

[0158] S500, the laser beam of the laser welding device 20 is controlled to periodically oscillate in a circular motion along a direction perpendicular to the welding direction.

[0159] Before laser welding, the motion pattern of the laser beam can be preset. Specifically, the controller 400 sends control commands to the laser welding device 20, causing the laser beam output by the laser welding device 20 to perform a periodic circular oscillation motion in space. The plane of this circular oscillation is perpendicular to the welding direction; that is, when the laser welding device 20 moves along the weld direction, the laser beam moves in a circle in a plane perpendicular to the direction of movement.

[0160] The specific parameters of this circular oscillation can be adjusted according to welding requirements. The controller 400 determines the time required for the laser beam to complete a full circular motion by setting the oscillation frequency, and determines the size of the circular trajectory by setting the oscillation radius. In the actual welding process, the laser beam moves along the weld seam direction with the laser welding device 20 while oscillating in a circular motion in the vertical plane, thus forming a spiral scanning trajectory.

[0161] For example, the oscillation frequency of the laser beam can be 30Hz and the oscillation radius can be 3mm.

[0162] This oscillation control can be initiated before the laser welding device 20 moves along the teach path and begins welding, ensuring that the laser beam operates in a set oscillation mode from the emission point. The controller 400 can continuously monitor and maintain this oscillation state until the laser welding device 20 reaches the off point to complete the welding.

[0163] In some embodiments, different oscillation parameters can be used at different welding stages. For example, a smaller oscillation radius and a lower oscillation frequency can be used at the beginning of welding, standard oscillation parameters can be used in the middle of welding, and the oscillation amplitude can be gradually reduced at the end of welding to achieve better welding quality control.

[0164] In some embodiments, the oscillation control can be linked to the wire feeding speed. When the wire feeding speed increases, the oscillation radius is increased accordingly to ensure that the added filler material can be evenly distributed in the weld and to avoid accumulation or unevenness.

[0165] In some possible implementations, prior to step S400, the method of using the laser welding system may also include:

[0166] S600, the laser beam of the laser welding device 20 is controlled to form an angle of 78° to 82° with the surface of the workpiece to be welded, such as 78°, 80° or 82°. For example, the controller 400 can control the movement of the moving component 200 to move the laser welding device 20 so that the laser beam of the laser welding device 20 forms an angle with the workpiece to be welded.

[0167] This application embodiment also provides a method for welding the underframe floor and underframe side beams of a rail vehicle, including:

[0168] Place the base frame floor on the base frame assembly welding platform, assemble the base frame floor and base frame side beams to fit tightly, with an assembly gap of less than 0.3mm, and then tack weld them.

[0169] The welding process utilizes a fiber laser welding device 20, with a fiber core diameter of 50μm, a focal length of 150mm, a collimated focal length of 50mm, a laser emission power of 1.5KW, a laser beam oscillation diameter of 3mm, a wire feed speed of 14mm / s, and a welding speed of 12mm / s. The base plate material is 1mm thick 06Cr19Ni10 steel, and the side beams are 8mm thick Q355D steel.

[0170] The protective gas is output from the laser welding device 20. The protective gas is pure argon, and the gas flow rate is 15-20 L / min.

[0171] The laser welding device 20 forms a laser spot with a diameter of 0.15 mm, and the welding wire in the laser welding device 20 has a diameter of 1.0 mm. The laser beam oscillation welding method avoids welding wire sticking or incomplete melting.

[0172] It should be understood that the embodiments of this application are not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An installation device for a laser welding apparatus, characterized in that, include: Base (100); A movable component (200) is disposed on the base (100); Mounting component (300), which is connected to the movable component (200); A controller (400) is disposed on the base (100), and the controller (400) is communicatively connected to the moving component (200). The controller (400) controls the moving component (200) to move, thereby driving the mounting component (300) to move. A clamping assembly (500) includes a first clamping member (510) and a second clamping member (520). Both the first clamping member (510) and the second clamping member (520) are connected to the mounting member (300). The distance between the first clamping member (510) and the second clamping member (520) is adjustable. The first clamping member (510), the second clamping member (520), and the mounting member (300) are used to jointly clamp the laser welding device (20).

2. The mounting device for the laser welding apparatus according to claim 1, characterized in that, It also includes at least one first connector; The mounting member (300) has at least one strip hole (310) extending along the first clamping member (510) toward the second clamping member (520); The first clamping member (510) has at least one first connecting hole (511), the first connecting hole (511), the strip hole (310) and the first connector are in one-to-one correspondence, and the first connector is inserted into the corresponding first connecting hole (511) and the strip hole (310) in sequence to connect the first clamping member (510) and the mounting member (300).

3. The mounting device for the laser welding apparatus according to claim 2, characterized in that, The number of the strip holes (310) is two or more, and each strip hole (310) is spaced apart along the extension direction of the first clamping member (510).

4. The mounting device for the laser welding apparatus according to any one of claims 1-3, characterized in that, The first clamping member (510) includes: A first connecting segment (512) is connected to the mounting component (300); The first clamping section (513) is connected to the first connecting section (512), and the first clamping section (513) has a first clamping hole (515) for accommodating the laser welding device (20). The second connecting segment (514) is connected to the end of the first clamping segment (513) opposite to the first connecting segment (512), and the second connecting segment (514) is connected to the mounting member (300).

5. The mounting device for the laser welding apparatus according to any one of claims 1-3, characterized in that, It also includes at least one second connector; The mounting component (300) has at least one mounting hole; The second clamping member (520) has at least one second connecting hole (521). The second connecting hole (521), the mounting hole and the second connector correspond one to one. The second connector is inserted into the corresponding second connecting hole (521) and the mounting hole in sequence to connect the second clamping member (520) and the mounting member (300). The second clamping member (520) also has a second clamping hole (522) for accommodating the laser welding device (20).

6. The mounting device for the laser welding apparatus according to any one of claims 1-3, characterized in that, It also includes a protective element (700), said protective element (700) comprising: A fixing segment (710) is connected to the mounting member (300); A first protective section (720) is connected to the fixed section (710), and the first protective section (720) is used to extend to one side of the trigger switch of the laser welding device (20); The second protective section (730) is connected to the first protective section (720) and extends to the side of the laser welding device (20) away from the mounting member (300).

7. A laser welding system, characterized in that, include: Mounting device (10) for the laser welding apparatus (20) according to any one of claims 1-6; A laser welding device (20) is connected to the mounting device (10).

8. A method of using the laser welding system as described in claim 7, characterized in that, include: Determine the first safety point, the light-emitting point, at least one intermediate transition point, the light-off point, and the second safety point of the laser welding device (20); The laser welding device (20) is controlled to move sequentially along the first safety point, the light-emitting point, at least one of the intermediate transition points, the light-off point and the second safety point; The path along which the laser welding device (20) moves from the first safety point to the second safety point is determined as the teaching path; The moving component (200) of the control installation device (10) moves along the teaching path to drive the laser welding device (20) to move along the teaching path and control the operation of the laser welding device (20).

9. The method of using the laser welding system according to claim 8, characterized in that, The control of the laser welding device (20) to move sequentially along the first safety point, the light-emitting point, at least one of the intermediate transition points, the light-off point, and the second safety point includes: Control the laser welding device (20) to move along the first safety point to the light emission point; The laser welding device (20) is controlled to move sequentially along the light-emitting point, at least one of the intermediate transition points and the light-off point in a preset motion state. The preset motion state includes at least one of linear motion state, circular arc motion state and full circle motion state. Control the laser welding device (20) to move along the light-off point to the second safety point.

10. The method of using the laser welding system according to claim 9, characterized in that, Before the moving component (200) of the control mounting device (10) moves along the teaching path to drive the laser welding device (20) to move along the teaching path and control the operation of the laser welding device (20), the following is also included: The laser beam of the laser welding device (20) is controlled to oscillate periodically in a direction perpendicular to the welding direction.

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