Laser welding tooling for high-strength steel workpieces and laser welding system

Abstract

The present invention discloses a laser welding tooling and a laser welding system for high-strength steel workpieces, which include: a first positioning component for positioning a strip-shaped main body and a first connecting body; a first clamping component for keeping the first connecting body in close contact with the upper surface of the strip-shaped main body by applying pressure; a second positioning component for positioning a second connecting body and a third connecting body of the high-strength steel workpiece; a second clamping component for keeping the second connecting body in close contact with the first side surface of the strip-shaped main body and the third connecting body in close contact with the second side surface of the strip-shaped main body by applying pressure; and a control unit. The present invention is designed specifically for the characteristics of high strength and high stiffness of high-strength steel, can effectively and quickly position and clamp high-strength steel workpieces, avoid stress deformation during the welding process, and ensure the welding accuracy and stability of the workpieces.

Description

Technical Field

[0001] The present invention relates to the field of laser welding, and specifically to a laser welding tooling and a laser welding system for high-strength steel workpieces. Background Art

[0002] With the increasing severity of the global environmental and energy crises, energy conservation and emission reduction have become major issues faced by the automotive manufacturing industry. A large number of studies have shown that reducing the mass of the automotive body-in-white is an effective measure to reduce fuel consumption. Therefore, automotive lightweight technology has become the current development trend in the automotive industry.

[0003] To achieve the goal of automotive lightweighting, currently, most methods include using high-strength steel to replace ordinary steel, reducing the thickness specification of steel plates, etc., and combining with advanced laser welding processes to achieve the welding of parts. However, due to the high strength and large stiffness of high-strength steel workpieces, their weldability is worse than that of ordinary low-carbon steel. Therefore, how to overcome welding stress deformation when using lasers to weld high-strength steel workpieces, such as various automotive parts, and ensure the welding accuracy and stability of parts has become an urgent problem to be solved in the field of laser welding. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a laser welding tooling and a laser welding system for high-strength steel workpieces, which are specifically designed for the characteristics of high strength and large stiffness of high-strength steel, can effectively and quickly position and clamp high-strength steel workpieces, and avoid stress deformation during the welding process, ensuring the welding accuracy and stability of the workpieces.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] On the one hand, a laser welding tooling for high-strength steel workpieces is provided, which includes:

[0007] A first positioning component, which is used to position the bar-shaped main body and the first connecting body of the high-strength steel workpiece, so that the first connecting body fits partially / entirely with the upper surface of the bar-shaped main body;

[0008] A first clamping component, which is used to keep the first connecting body in a fitting state with the upper surface of the bar-shaped main body by applying pressure;

[0009] A second positioning component, which is connected to the first positioning component and is used to position the second connecting body and the third connecting body of the high-strength steel workpiece, so that the second connecting body fits partially / entirely with the first side surface of the bar-shaped main body, and the third connecting body fits partially / entirely with the second side surface of the bar-shaped main body;

[0010] The second clamping assembly is used to keep the second connecting body in contact with the first side surface of the strip-shaped main body and the third connecting body in contact with the second side surface of the strip-shaped main body by applying pressure.

[0011] And a control unit, which is connected to one or more of the first positioning assembly, the first clamping assembly, the second positioning assembly, and the second clamping assembly to control one or more of the first positioning assembly, the first clamping assembly, the second positioning assembly, and the second clamping assembly to perform corresponding actions.

[0012] Preferably, the first positioning assembly includes:

[0013] A plurality of positioning support columns arranged along the Y direction;

[0014] A plurality of first Z-direction positioning blocks, and at least one first Z-direction positioning block is connected to the upper end surface of each positioning support column. The first Z-direction positioning blocks are used to support the strip-shaped main body and perform Z-direction positioning on it.

[0015] A first positioning pin, which is connected to the positioning support column and extends in the Z direction. The same first positioning pin cooperates with the positioning holes on the strip-shaped main body and the first connecting body at the same time, so that the first connecting body is in contact with part / all of the upper surface of the strip-shaped main body under its own gravity, so as to realize the X / Y-direction positioning of the strip-shaped main body and the first connecting body at the same time.

[0016] Preferably, the first clamping assembly includes:

[0017] A first air cylinder;

[0018] A turning arm, which is hinged to the telescopic end of the first air cylinder;

[0019] A pressing block mounting cross beam, which is connected to the turning arm;

[0020] A plurality of Z-direction pressing blocks, which are connected to the bottom of the pressing block mounting cross beam;

[0021] Through the linear telescopic movement of the telescopic end of the first air cylinder, the turning arm and the pressing block mounting cross beam are driven to rotate synchronously around the hinge point of the turning arm and the telescopic end of the air cylinder, so that the Z-direction pressing block moves towards the strip-shaped main body and the first connecting body that have been positioned by the first positioning assembly until it contacts the first connecting body and applies pressure to it in the Z direction, so that the first connecting body is in contact with the upper surface of the strip-shaped main body.

[0022] Preferably, the first clamping assembly further includes:

[0023] A rotary air cylinder, which is used to clamp the pressing block mounting cross beam when the pressing block mounting cross beam rotates in place, and the Z-direction pressing block contacts the first connecting body and applies pressure to it.

[0024] Preferably, the second positioning assembly includes:

[0025] A plurality of second Z-direction positioning blocks connecting the upper end surfaces of the positioning support columns, and in the X direction, at least one second Z-direction positioning block is provided on each side of the first Z-direction positioning block. Among them, the second Z-direction positioning block located on one side of the first Z-direction positioning block is used to support the second connecting body and perform Z-direction positioning on it, and the second Z-direction positioning block located on the other side of the first Z-direction positioning block is used to support the third connecting body and perform Z-direction positioning on it;

[0026] And a second positioning pin, which is arranged close to the second Z-direction positioning block and extends in the Z direction, and is used to cooperate with the positioning holes on the second connecting body and the third connecting body respectively to realize the X / Y-direction positioning of the second connecting body and the third connecting body.

[0027] Preferably, the second clamping assembly includes:

[0028] Two groups of key-type pneumatic clamping mechanisms. One group of key-type pneumatic clamping mechanisms applies pressure to the second connecting body to keep the second connecting body in a fitting state with the first side surface of the strip-shaped main body, and the other group of key-type pneumatic clamping mechanisms applies pressure to the third connecting body to keep the third connecting body in a fitting state with the second side surface of the strip-shaped main body.

[0029] Preferably, each key-type pneumatic clamping mechanism is provided with a plurality of key pressing blocks arranged in the Y direction and a second cylinder for driving the movement of the key pressing blocks. The key pressing blocks generate a key-type clamping action under the drive of the second cylinder to apply pressure to the second connecting body in the X direction, or apply pressure to the third connecting body in the X direction.

[0030] Preferably, the laser welding tooling further includes: an air knife, which is connected to the first positioning assembly and / or connected to the second clamping assembly.

[0031] Preferably, the laser welding tooling further includes: a detection switch, which is connected to the first positioning assembly and / or connected to the second clamping assembly, and is used to detect whether the strip-shaped main body and / or the first connecting piece and / or the second connecting piece and / or the third connecting piece are fixed in place.

[0032] On the other hand, a laser welding device is also provided, which includes the above-mentioned laser welding tooling and a laser welding head. After clamping and fixing the high-strength steel workpiece by using the above-mentioned laser welding tooling, the laser welding head welds the fitting parts of the first connecting piece, the second connecting body, the third connecting body and the strip-shaped main body to form a weld seam.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The laser welding tooling in the present invention is particularly suitable for clamping and fixing high-strength steel workpieces (such as bar-shaped workpieces like battery tray crossbeams) with characteristics such as high strength and high stiffness.

[0035] 2. The present invention ensures that all components can maintain a fitting state at different positions through key-type pressing (Z-direction pressing blocks and key pressing blocks), thereby overcoming welding stress deformation and ensuring welding quality.

[0036] 3. The actions of cylinders, positioning pins, etc. are all electrically automatically controlled by a control unit. After loading the workpiece, manually triggering a button can automatically complete actions such as the telescoping of the positioning pin and the start and stop of the cylinder. Welding can be carried out after one-time workpiece loading, positioning, and clamping, thereby greatly improving production efficiency and reducing the intensity of manual operations.

[0037] 4. The pressing block mounting crossbeam is clamped by a rotary cylinder, thereby making the pressing block mounting crossbeam in a locked state, and transmitting the clamping force of the rotary cylinder to the high-strength steel workpiece through the pressing block mounting crossbeam, further overcoming welding deformation generated during subsequent welding and ensuring welding accuracy and stability. Description of the Drawings

[0038] Figure 1a It is an overall structure diagram of a high-strength steel workpiece from one perspective;

[0039] Figure 1b It is an overall structure diagram of a high-strength steel workpiece from another perspective;

[0040] Figure 1c It is a top view of a high-strength steel workpiece;

[0041] Figure 1d It is a front view of a high-strength steel workpiece;

[0042] Figure 2a It is an overall structure diagram when the first clamping component of the laser welding tooling of the present invention clamps a high-strength steel workpiece from one perspective;

[0043] Figure 2b At Figure 2a It is an overall structure diagram when the first clamping component of the laser welding tooling of the present invention releases a high-strength steel workpiece from the same perspective;

[0044] Figure 3a It is an overall structure diagram of the first positioning component of the present invention;

[0045] Figure 3b It is a state diagram when the first positioning component of the present invention clamps and fixes a high-strength steel workpiece;

[0046] Figure 4a It is an overall structure diagram when the first clamping component of the laser welding tooling of the present invention clamps a high-strength steel workpiece from another perspective;

[0047] Figure 4b This is the overall structure diagram of the first clamping component of the present invention;

[0048] Figure 4c This is the top view of the first clamping component of the present invention;

[0049] Figure 5a This is the structure diagram of the second positioning component and the second clamping component of the present invention from one perspective;

[0050] Figure 5b This is at Figure 5a Under the same perspective, the state diagram of the second positioning component of the present invention fixing the second connecting piece and the third connecting piece;

[0051] Figure 5c This is the state diagram of the second positioning component of the present invention fixing the second connecting piece from another perspective;

[0052] Figure 6 This is the structure diagram of the second clamping component of the present invention from another perspective;

[0053] Figure 7a This is Figure 4b The partial structure diagram at position A in

[0054] Figure 7b This is Figure 5a The partial structure diagram at position B in Detailed implementation manners

[0055] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0056] Embodiment 1:

[0057] As Figures 1a - 1dAs shown in the figure, the high-strength steel workpiece 100 in this embodiment includes: a strip-shaped main body 1 having parallel upper surface S1, lower surface S2, and parallel first side surface S3 and second side surface S4; a first connecting body 2 fitting on the upper surface S1 of the strip-shaped main body 1 in the length direction of the strip-shaped main body 1; a second connecting body 3 fitting on the first side surface S3 of the strip-shaped main body 1 in the length direction of the strip-shaped main body 1, and a third connecting body 4 fitting on the second side surface S4 of the strip-shaped main body 1 in the length direction of the strip-shaped main body 1, and the second connecting body 3 and the third connecting body 4 are symmetrically arranged with respect to the strip-shaped main body 1; wherein, one or more of the first connecting body 2, the second connecting body 3, the third connecting body 4 and the strip-shaped main body 1 are made of high-strength steel, and at the same time, the first connecting body 2 and / or the second connecting body 3 and / or the third connecting body 4 are strip-shaped members; for example, the high-strength steel workpiece in this embodiment can be a cross beam of an automotive battery tray, the strip-shaped main body 1 is a rectangular tube, the first connecting body 2 is a U-shaped cover fitting on the upper surface of the rectangular tube, and the second connecting body 3 and the third connecting body 4 are L-shaped members respectively corresponding to fitting on the two side surfaces of the rectangular tube.

[0058] In addition, this embodiment provides a laser welding tooling for clamping and fixing the above high-strength steel workpiece 100, as Figures 2a - 2b shown, which includes:

[0059] A bottom plate 10;

[0060] A first positioning assembly 20, which is installed on the bottom plate 10 and is used to position the strip-shaped main body 1 and the first connecting body 2 so that the first connecting body 2 partially / entirely fits on the upper surface S1 of the strip-shaped main body 1; further, after the strip-shaped main body 1 is positioned by the first positioning assembly 20, it is in an upright or nearly upright state;

[0061] A first clamping assembly 30, which is installed on the bottom plate 10 and is used to keep the first connecting body 2 in a fitting state with the upper surface S1 of the strip-shaped main body 1 by applying pressure;

[0062] A second positioning assembly 40, which is connected to the first positioning assembly 20 and is used to position the second connecting body 3 and the third connecting body 4 so that the second connecting body 3 partially / entirely fits on the first side surface S3 of the strip-shaped main body 1, and the third connecting body 4 partially / entirely fits on the second side surface S4 of the strip-shaped main body 1;

[0063] A second clamping assembly 50, which is installed on the bottom plate 10 and is used to keep the second connecting body 3 in a fitting state with the first side surface S3 of the strip-shaped main body 1 by applying pressure, and the third connecting body 4 in a fitting state with the second side surface S4 of the strip-shaped main body 1;

[0064] and a control unit, which is connected to one or more of the first positioning assembly 20, the first clamping assembly 30, the second positioning assembly 40, and the second clamping assembly 50 to control one or more of the first positioning assembly 20, the first clamping assembly 30, the second positioning assembly 40, and the second clamping assembly 50 to perform corresponding actions.

[0065] Further, as Figures 3a - 3b shown, the first positioning assembly 20 includes:

[0066] A plurality of positioning support columns 201 arranged along the Y direction. Preferably, there are 2 positioning support columns 201;

[0067] A plurality of first Z-direction positioning blocks 202, and at least one first Z-direction positioning block 202 is connected to the upper end surface of each positioning support column 201. The first Z-direction positioning blocks 202 are used to support the strip-shaped main body 1 and perform Z-direction positioning on it; at this time, the upper surface S1 of the strip-shaped main body 1 is above the lower surface S2;

[0068] A first positioning pin 203, which is connected to the positioning support column 201 and extends in the Z direction. The same first positioning pin 203 is simultaneously engaged with the positioning holes on the strip-shaped main body 1 and the first connecting body 2 (such as the same first positioning pin 203 passes through the positioning hole on the strip-shaped main body 1 and the positioning hole on the first connecting body 2 at the same time), so that the first connecting body 2 is partially / fully attached to the upper surface S1 of the strip-shaped main body 1 under its own gravity to simultaneously realize the X / Y-direction positioning of the strip-shaped main body 1 and the first connecting body 2; in this embodiment, each positioning support column 201 is correspondingly connected to a first positioning pin 203.

[0069] As Figures 4a - 4c shown, the first clamping assembly 30 includes:

[0070] The first cylinder 301, and there can be several of them, such as 2;

[0071] The flip arm 302, which is hinged to the telescopic end of the first cylinder 301 through a hinge 3021 provided at the end, and the central axis Y' of the hinge position 3022 extends along the Y direction;

[0072] The pressure block mounting cross beam 303, which is connected to the flip arm 302;

[0073] A plurality of Z-direction pressure blocks 304, which are connected to the bottom of the pressure block mounting cross beam 303 and are evenly spaced along the Y direction;

[0074] Moreover, the flipping arm 302 and the pressing block mounting cross beam 303 both extend in the Y direction; the linear telescopic motion of the telescopic end of the first cylinder 301 drives the flipping arm 302 and the pressing block mounting cross beam 303 to rotate synchronously around the hinge point 3022 of the flipping arm 302 and the telescopic end of the cylinder 301 (i.e., Figure 4b in the direction indicated by the arrow in

[0075] such that the Z-direction pressing block 304 faces the strip-shaped main body 1 and the first connecting body 2 that have been positioned by the first positioning assembly 20, and moves until it contacts the first connecting body 2 and applies pressure to it in the Z direction, so that the first connecting body 2 remains in a fitting state with the upper surface S1 of the strip-shaped main body 1. Figure 3a As shown in

[0076] FIGS. 5a - 5c, the second positioning assembly 40 includes:

[0077] A plurality of second Z-direction positioning blocks 401 connecting the upper end surfaces of the positioning support columns 201. In the X direction, at least one second Z-direction positioning block 401 is provided on each side of the first Z-direction positioning block 202. Among them, the second Z-direction positioning block 401 located on one side of the first Z-direction positioning block 202 is used to support the second connecting body 3 and perform Z-direction positioning on it, and the second Z-direction positioning block 401 located on the other side of the first Z-direction positioning block 202 is used to support the third connecting body 4 and perform Z-direction positioning on it; further, the first Z-direction positioning block 202 and the second Z-direction positioning block 401 have the same structure, and the first Z-direction positioning block 202 and the second Z-direction positioning block 401 are arranged side by side in the X direction, thereby making the strip-shaped main body 1 positioned by the first Z-direction positioning block 202 approach the second connecting body 3 and the third connecting body 4 positioned by the second Z-direction positioning block 401;

[0078] As well as a second positioning pin 402, which is arranged close to the second Z-direction positioning block 401 and extends in the Z direction, and is used to cooperate with the positioning holes on the second connecting body 3 and the third connecting body 4 respectively (such as one second positioning pin 402 passing through the positioning hole on the second connecting body 3 and another second positioning pin 402 passing through the positioning hole on the third connecting body 4), so as to realize the X / Y-direction positioning of the second connecting body 3 and the third connecting body 4, and make the second connecting body 3 partially / entirely fit with the first side surface S3 of the strip-shaped main body 1, and make the third connecting body 4 partially / entirely fit with the second side surface S4 of the strip-shaped main body 1. Figures 2a - 2b As shown in FIGS. 5a - 5c and 6, the second clamping assembly 50 includes:

[0079] Two groups of key - type pneumatic clamping mechanisms 501, both of which are connected to the bottom plate 10 and are symmetrically arranged about the positioned strip - shaped body 1 in the X - direction; and one group of key - type pneumatic clamping mechanisms 501 applies pressure to the second connecting body 3 to keep the second connecting body 3 in a fitting state with the first side surface S3 of the strip - shaped body 1, and the other group of key - type pneumatic clamping mechanisms 501 applies pressure to the third connecting body 4 to keep the third connecting body 4 in a fitting state with the second side surface S4 of the strip - shaped body 1;

[0080] Further, each key - type pneumatic clamping mechanism 501 is provided with a plurality of key - type pressing blocks 502 arranged along the Y - direction and a second air cylinder 503 for driving the movement of the key - type pressing blocks 502. The key - type pressing blocks 502 generate a key - type clamping action under the drive of the second air cylinder 503 and move towards the second connecting body 3 that has been positioned by the second positioning assembly 40, so as to apply pressure to the second connecting body 3 in the X - direction to keep the second connecting body 3 in a fitting state with the first side surface S3 of the strip - shaped body 1, or apply pressure to the third connecting body 4 in the X - direction to keep the third connecting body 4 in a fitting state with the second side surface S4 of the strip - shaped body 1; Preferably, there can be a plurality of key - type pneumatic clamping mechanisms 501 in this embodiment, which are arranged along the Y - direction. Thus, different positions of the second connecting body 3 and the third connecting body 4 can be clamped, so that all parts of the second connecting body 3 and the third connecting body 4 can be kept close to the strip - shaped body 1 to ensure the subsequent welding quality.

[0081] Further, the first positioning pin 203 and the second positioning pin 402 in this embodiment are both telescopic pins. The control unit is respectively connected to one or several of the first positioning pin 203, the second positioning pin 402, the first air cylinder 301, and the second air cylinder 503 to control one or several of the first positioning pin 203, the second positioning pin 402, the first air cylinder 301, and the second air cylinder 503 to generate corresponding actions according to a preset program. The control can be realized by triggering a button or other means;

[0082] For example, controlling the telescoping of the first positioning pin 203 and / or the second positioning pin 402, and starting the first air cylinder 301 and the second air cylinder 503, further driving the flipping arm 302 to flip and driving the key - type pressing blocks 502 to move, etc., so as to facilitate the operator to perform the loading and unloading operations.

[0083] During operation, first place the strip - shaped body 1 on the first Z - direction positioning block 202, and make the strip - shaped body 1 in an upright or nearly upright state with its upper surface S1 facing upwards. Then align the positioning holes of the strip - shaped body 1 and the first connecting body 2. The control component controls the first positioning pin 203 to extend, so that it simultaneously passes through the positioning hole on the strip - shaped body 1 and the positioning hole on the first connecting body 2 to simultaneously realize the X / Y - direction positioning of the strip - shaped body 1 and the first connecting body 2;

[0084] Then the control component starts the first cylinder 301. The linear telescopic motion of the telescopic end of the first cylinder 301 drives the turning arm 302 to rotate around the hinge point 3022 of the turning arm 302 and the telescopic end of the cylinder 301, so that the first Z-direction pressing block 304 moves towards the strip-shaped main body 1 and the first connecting body 2 that have been positioned by the first positioning component 20, until it contacts the first connecting body 2 and applies a Z-direction pressure to it, so that the first connecting body 2 and the upper surface S1 of the strip-shaped main body 1 remain in a fitting state;

[0085] Start the laser welding equipment for welding to form a weld P1 at the joint between the first connecting body 2 and the strip-shaped main body 1 (as Figure 1a shown);

[0086] Then place the second connecting body 3 and the third connecting body 4 on the second Z-direction positioning blocks 401 on both sides of the first Z-direction positioning block 202 respectively. The control component controls the second positioning pin 402 to extend, and it correspondingly passes through the positioning holes on the second connecting body 3 and the third connecting body 4 to achieve the X / Y-direction positioning of the second connecting body 3 and the third connecting body 4;

[0087] Then the control component starts the second cylinder 503. The key pressing block 502 generates a key-type clamping action under the drive of the second cylinder 503 and moves towards the second connecting body 3 and the third connecting body 4 that have been positioned by the second positioning component 40, so as to apply a pressure to the second connecting body 3 and the third connecting body 4 in the X direction, so that the second connecting body 3 and the third connecting body 4 correspondingly remain in a fitting state with the first side surface S3 and the second side surface S4 of the strip-shaped main body 1;

[0088] Start the laser welding equipment for welding to form a weld P2 at the joint between the second connecting body 3, the second side surface S4 and the strip-shaped main body 1 (as Figure 1a shown);

[0089] After all the welding is completed, the control component starts the first cylinder 301 again. The linear telescopic motion of the telescopic end of the first cylinder 301 drives the turning arm 302 to rotate reversely around the hinge point 3022 of the turning arm 302 and the telescopic end of the cylinder 301, so that the first Z-direction pressing block 304 moves away from the high-strength steel workpiece 100 that has been welded, relieving the pressure on the first connecting body 2 and the strip-shaped main body 1, and the control component starts the second cylinder 503 again. The key pressing block 502 moves reversely under the drive of the second cylinder 503 and moves away from the second connecting body 3 and the third connecting body 4 that have been welded, so as to relieve the pressure applied to the second connecting body 3 and the third connecting body 4;

[0090] Then the control component retracts the first positioning pin 203 and the second positioning pin 402, and withdraws from the high-strength steel workpiece 100, and then the subsequent personnel can take the workpiece.

[0091] Thus, the laser welding tooling structure in this embodiment is designed simply and practically, and is especially suitable for clamping and fixing high-strength steel workpieces (such as strip-shaped workpieces like battery tray crossbeams) with characteristics such as high strength and high stiffness. Specifically, the Z-direction pressing block 304 and the piano key pressing block 502 perform piano key pressing on the strip-shaped main body 1, the first connecting body 2, and the second connecting body 3 in the length direction to ensure that all components can maintain a fitting state at different positions, thereby overcoming welding stress deformation and ensuring the welding accuracy and stability of the parts. At the same time, the actions of the cylinder, positioning pins, etc. are all automatically controlled electrically through the control unit. After loading the workpiece, manually triggering the button can automatically complete actions such as the telescoping of the positioning pins and the start and stop of the cylinder, and welding can be carried out after one-time workpiece loading, positioning, and clamping, thereby greatly improving production efficiency and reducing the intensity of manual operations.

[0092] Embodiment 2:

[0093] The difference between this embodiment and Embodiment 1 is only that, as Figures 4b - 4c shown, the first clamping assembly 30 further includes: a rotary cylinder 305, which is connected to the bottom plate 10 and is used to clamp the pressing block mounting crossbeam 303 when the pressing block mounting crossbeam 303 rotates in place and the Z-direction pressing block 304 contacts the first connecting body 2 and applies pressure to it, so that the pressing block mounting crossbeam 303 is in a locked state, and the clamping force of the rotary cylinder 305 is transmitted to the high-strength steel workpiece 100 through the pressing block mounting crossbeam 303 to further overcome the welding deformation generated during the subsequent welding process and ensure the welding accuracy and stability.

[0094] A slider 306 and a slide rail 307, wherein the slider 306 is connected to the pressing block mounting crossbeam 303, the slide rail 307 is connected to the flipping arm 302, or the slider 306 is connected to the flipping arm 302 and the slide rail 307 is connected to the pressing block mounting crossbeam 303. Thus, the movable connection between the pressing block mounting crossbeam 303 and the flipping arm 302 is realized through the cooperation of the slider 306 and the slide rail 307, so as to facilitate the disassembly and replacement of the pressing block mounting crossbeam 303 and the Z-direction pressing block 304 according to welding needs.

[0095] Embodiment 3:

[0096] The difference between this embodiment and Embodiment 1 or 2 is only that, as Figures 7a - 7b shown, the Z-direction pressing block 304 and / or the piano key pressing block 502 has a disc spring 60, so that the above Z-direction pressing block 304 and / or the piano key pressing block 502 has an elastic clamping function, and the workpiece can be further clamped through the elasticity of the disc spring 60 to compensate for the clearance error of the workpiece fitting surface, so that the workpiece is always in a tightly fitting state, ensuring the welding quality of the workpiece and enabling the workpiece to have the same strength as the base material after welding.

[0097] Embodiment 4:

[0098] This embodiment is different from Embodiment 1, 2, or 3 only in that, as shown in FIGS. Figures 5a - 4c 6, the laser welding tooling capable of clamping and fixing the high-strength steel workpiece 100 further includes:

[0099] An air knife 70, which is connected to the lower part of the pressure block mounting cross beam 303 and is disposed close to the Z-direction pressure block 304, and / or is connected to the piano-key type pneumatic clamping mechanism 501 and is disposed close to the piano-key pressure block 502. Thus, the air knife 70 blows air to the welding area to promote air convection at the welding area, the Z-direction pressure block 304, and / or the piano-key pressure block 502, achieving a cooling effect and avoiding heat accumulation during batch welding, thereby improving the welding quality;

[0100] And a detection switch 80 (such as a photoelectric switch such as an infrared sensor), which is connected to the positioning support column 201 of the first positioning assembly 20, and / or is connected to the piano-key type pneumatic clamping mechanism 501 of the second clamping assembly 50, and is used to detect whether the strip-shaped main body 1 and / or the first connecting member 2 and / or the second connecting member 3 and / or the third connecting member 4 are fixed in place, serving as a foolproof design to prevent production accidents or unqualified welding quality caused by missing installation or improper clamping of the workpiece.

[0101] Embodiment 5:

[0102] This embodiment provides a laser welding device, which includes: the laser welding tooling according to any one of Embodiments 1-4, and a laser welding head. After using the laser welding tooling according to any one of Embodiments 1-4 to clamp and fix the high-strength steel workpiece 100, the laser welding head welds the joint between the first connecting member 2, the second connecting body 3, the third connecting body 4 and the strip-shaped main body 1 to form corresponding welds.

[0103] In summary, the structural design of the laser welding tooling in the present invention is simple and practical, and is particularly suitable for clamping and fixing high-strength steel workpieces (such as strip-shaped workpieces such as battery tray cross beams) with characteristics such as high strength and high stiffness. Specifically, the Z-direction pressure block 304 and the piano-key pressure block 502 perform piano-key type pressing on the strip-shaped main body 1, the first connecting body 2, and the second connecting body 3 in the length direction to ensure that all components can maintain a fitting state at different positions, thereby overcoming welding stress deformation and ensuring welding quality. At the same time, the pressing block mounting cross beam is further strongly clamped by the rotary cylinder to ensure welding accuracy and stability; meanwhile, the actions of the cylinder, positioning pins, etc. are all automatically controlled electrically by the control unit. After the workpiece is loaded, the operator can trigger a button to automatically complete actions such as the telescoping of the positioning pins and the start and stop of the cylinder, and welding can be carried out after one-time workpiece loading, positioning, and clamping, thereby greatly improving production efficiency and reducing the labor intensity of manual operations.

[0104] It should be noted that in this text, terms such as "including", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0105] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A laser welding tooling for high-strength steel workpieces, the high-strength steel workpieces comprising: A bar-shaped body having a parallel upper surface, a lower surface, a first side surface and a second side surface; a first connecting body attached to the upper surface of the bar-shaped body in the length direction of the bar-shaped body; A second connecting body attached to the first side surface of the bar-shaped body in the length direction of the bar-shaped body, and a third connecting body attached to the second side surface of the bar-shaped body in the length direction of the bar-shaped body; characterized in that the laser welding tooling includes: A first positioning component for positioning the bar-shaped body and the first connecting body of the high-strength steel workpiece, so that the first connecting body is partially / fully attached to the upper surface of the bar-shaped body; A first clamping component for keeping the first connecting body attached to the upper surface of the bar-shaped body by applying pressure; A second positioning component connected to the first positioning component for positioning the second connecting body and the third connecting body of the high-strength steel workpiece, so that the second connecting body is partially / fully attached to the first side surface of the bar-shaped body, and the third connecting body is partially / fully attached to the second side surface of the bar-shaped body; A second clamping component for keeping the second connecting body attached to the first side surface of the bar-shaped body and the third connecting body attached to the second side surface of the bar-shaped body by applying pressure; And a control unit connected to one or more of the first positioning component, the first clamping component, the second positioning component and the second clamping component to control one or more of the first positioning component, the first clamping component, the second positioning component and the second clamping component to perform corresponding actions; The first clamping component includes: A first air cylinder; A turning arm hinged to the telescopic end of the first air cylinder; A pressing block mounting cross beam connected to the turning arm; A plurality of Z-direction pressing blocks connected to the bottom of the pressing block mounting cross beam; The linear telescopic movement of the telescopic end of the first air cylinder drives the turning arm and the pressing block mounting cross beam to rotate synchronously around the hinge point of the turning arm and the telescopic end of the first air cylinder, so that the Z-direction pressing blocks move towards the bar-shaped body and the first connecting body that have been positioned by the first positioning component until they contact the first connecting body and apply pressure to it in the Z direction to keep the first connecting body attached to the upper surface of the bar-shaped body; The second clamping component includes: Two groups of piano key type pneumatic clamping mechanisms, and one group of piano key type pneumatic clamping mechanisms applies pressure to the second connecting body to keep the second connecting body attached to the first side surface of the bar-shaped body, and the other group of piano key type pneumatic clamping mechanisms applies pressure to the third connecting body to keep the third connecting body attached to the second side surface of the bar-shaped body.

2. The laser welding tooling according to claim 1, characterized in that, The first positioning component includes: A plurality of positioning support columns arranged along the Y direction; A plurality of first Z-direction positioning blocks, and at least one first Z-direction positioning block is connected to the upper end surface of each positioning support column. The first Z-direction positioning blocks are used to support the bar-shaped body and perform Z-direction positioning on it; The first positioning pin is connected to the positioning support column and extends in the Z direction. The same first positioning pin cooperates with the positioning holes on the strip-shaped main body and the first connecting body at the same time, so that the first connecting body fits with the upper surface part / all of the strip-shaped main body under its own gravity, so as to realize the X / Y direction positioning of the strip-shaped main body and the first connecting body at the same time.

3. The laser welding tooling according to claim 1, characterized in that, The first clamping assembly further includes: A rotary cylinder, which is used to clamp the pressing block mounting cross beam when the pressing block mounting cross beam rotates in place, and the Z-direction pressing block contacts the first connecting body and applies pressure to it.

4. The laser welding tooling according to claim 2, characterized in that, The second positioning assembly includes: A plurality of second Z-direction positioning blocks connecting the upper end surfaces of the positioning support columns. In the X direction, at least one second Z-direction positioning block is provided on each side of the first Z-direction positioning block. Among them, the second Z-direction positioning block located on one side of the first Z-direction positioning block is used to support the second connecting body and perform Z-direction positioning on it, and the second Z-direction positioning block located on the other side of the first Z-direction positioning block is used to support the third connecting body and perform Z-direction positioning on it; And a second positioning pin, which is arranged close to the second Z-direction positioning block and extends in the Z direction, and is used to cooperate with the positioning holes on the second connecting body and the third connecting body respectively to realize the X / Y direction positioning of the second connecting body and the third connecting body.

5. The laser welding tooling according to claim 1, characterized in that, Each piano-key type pneumatic clamping mechanism is provided with a plurality of piano-key pressing blocks arranged along the Y direction and a second cylinder for driving the movement of the piano-key pressing blocks. The piano-key pressing blocks generate a piano-key type clamping action under the drive of the second cylinder to apply pressure to the second connecting body in the X direction, or apply pressure to the third connecting body in the X direction.

6. The laser welding tooling according to claim 1, characterized in that, The laser welding tooling further includes: an air knife, which is connected to the first positioning assembly and / or connected to the second clamping assembly.

7. The laser welding tooling according to claim 1, characterized in that, The laser welding tooling further includes: a detection switch, which is connected to the first positioning assembly and / or connected to the second clamping assembly, and is used to detect whether the strip-shaped main body and / or the first connecting piece and / or the second connecting piece and / or the third connecting piece are fixed in place.

8. A laser welding device, characterized in that, Including: The laser welding tooling according to any one of claims 1-7, and a laser welding head. After the high-strength steel workpiece is clamped and fixed by using the laser welding tooling according to any one of claims 1-7, the laser welding head welds the joint surfaces of the first connecting piece, the second connecting body, the third connecting body and the strip-shaped main body to form a weld seam.

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