A laser welding fixture

Abstract

This application belongs to the field of laser welding and relates to a laser welding fixture, including a base, a first clamping block, and a second clamping block. The first and second clamping blocks are respectively connected to the base. The first clamping block is used to clamp a workpiece to be welded, and the second clamping block is used to clamp another workpiece to be welded. A gap is reserved between the first and second clamping blocks. An clearance mounting groove is provided on the side wall of the first and / or second clamping blocks near the gap. An air pipe is installed in the clearance mounting groove, and multiple air blowing holes are provided on the side of the air pipe near the gap. A protective gas is connected to the outside of the air pipe. The technical solution provided by this application can blow the protective gas onto the back side of the weld, reducing the occurrence of oxidation and blackening on the back side of the weld and improving welding quality. At the same time, installing the air pipe on the lower side of the gap reduces the problem of debris and residue clogging the air blowing holes and improves processing stability.

Description

Technical Field

[0001] This application relates to the field of laser welding technology, and more specifically, to a laser welding fixture. Background Technology

[0002] Laser welding is a welding method that uses a focused laser beam as an energy source to bombard the workpiece and generate heat. Due to its advantages such as high precision, high efficiency, small heat-affected zone, and minimal deformation, laser welding has a promising future.

[0003] In related technologies, during laser welding, in order to prevent the weld seam at the workpiece from oxidizing due to contact with the outside air during the high-temperature welding process, which would cause the mechanical properties of the weld seam to deteriorate, an air blowing device is usually used in conjunction with the laser welding head to protect the weld seam area with inert gas.

[0004] In existing technologies, the laser welding head is typically positioned above the workpiece during processing. Therefore, the air blowing device can only deliver inert gas to the front of the weld, failing to protect the back side. Consequently, the lack of a device to protect the back of the weld during processing makes it prone to oxidation and blackening due to high temperatures, affecting weld quality. Utility Model Content

[0005] The technical problem to be solved by the embodiments of this application is that the back side of the weld in laser welding is prone to oxidation and blackening, which affects the welding quality.

[0006] To address the aforementioned technical problems, this application provides a laser welding fixture, employing the following technical solution:

[0007] A laser welding fixture includes a base, a first clamping block, and a second clamping block. The first clamping block and the second clamping block are respectively connected to the base. The first clamping block is used to clamp a workpiece to be welded, and the second clamping block is used to clamp another workpiece to be welded. A gap is reserved between the first clamping block and the second clamping block. An clearance mounting groove is provided on the side wall of the first clamping block and / or the second clamping block near the gap. An air pipe is provided in the clearance mounting groove. A plurality of air blowing holes are provided on the side of the air pipe near the gap. A protective gas is connected to the outside of the air pipe.

[0008] Furthermore, the clearance mounting groove is provided with multiple mounting blocks, and the air pipe is rotatably and limitingly connected to the mounting blocks.

[0009] Furthermore, the clearance mounting groove is recessed from the gap toward the geometric center of the first clamping block and / or the second clamping block, and the depth of the clearance mounting groove is greater than or equal to the cross-sectional diameter of the air tube.

[0010] Furthermore, a clamping and positioning component is provided on one side of the base, and a positioning block is provided on the output end of the clamping and positioning component. The clamping and positioning component can drive the positioning block to extend into or out of the gap.

[0011] Furthermore, the clamping and positioning assembly includes a positioning seat and a positioning cylinder. The positioning cylinder is hinged to the positioning seat, one end of the positioning block is hinged to the positioning seat, and the middle part of the positioning block is hinged to the output end of the positioning cylinder. The positioning cylinder can drive the positioning block to rotate and swing on the positioning seat.

[0012] Furthermore, there are two clamping and positioning components.

[0013] Furthermore, the size range of the gap is 8-15mm.

[0014] Furthermore, a slag receiving plate is provided directly below the gap. The slag receiving plate is connected to the first clamping block and the second clamping block respectively. A dust collection box is provided at one end of the slag receiving plate. The dust collection box is sealed to the side end face of the first clamping block and the second clamping block respectively. A suction device is connected to the outside of the dust collection box.

[0015] Furthermore, the end of the slag receiving plate away from the dust collection box is provided with a sealing cover plate, and the sealing cover plate is respectively sealed to the end face of the first clamping block and the second clamping block away from the dust collection box.

[0016] Furthermore, the upper surfaces of the first clamping block and the second clamping block are respectively provided with magnetic elements.

[0017] Compared with the prior art, the embodiments of this application have the following main advantages:

[0018] This invention features an air pipe installed within a clearance mounting groove, with an air blowing hole on the air pipe. This allows protective gas to be blown onto the back of the weld during laser welding, protecting the back of the weld and reducing oxidation and blackening, thus effectively improving welding quality. Simultaneously, the clearance mounting groove allows the air pipe to be installed to the side and below the gap, reducing the problem of welding debris falling into the gap and clogging the air blowing hole, thereby improving processing stability. Attached Figure Description

[0019] To more clearly illustrate the solution of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1This is a schematic diagram of the laser welding fixture in the retracted position of the positioning block according to an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the laser welding fixture in the extended positioning block state according to an embodiment of the present invention;

[0022] Figure 3 This is a top view of an embodiment of the present invention.

[0023] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure of the middle AA section;

[0024] Figure 5 yes Figure 4 A magnified structural diagram of part B in the middle section;

[0025] Figure 6 This is a schematic diagram of the slag receiving plate and the gas pipe in an embodiment of this utility model.

[0026] Figure label:

[0027] 1. Base; 2. First clamping block; 3. Second clamping block; 4. Gap; 5. Clearance mounting groove; 6. Air pipe; 61. Air blowing hole; 7. Mounting block; 8. Magnetic component; 9. Clamping and positioning assembly; 91. Positioning block; 92. Positioning seat; 93. Positioning cylinder; 10. Slag receiving plate; 11. Dust collection box; 12. Sealing cover plate. Detailed Implementation

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0029] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0030] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0031] like Figure 1-6 As shown, a laser welding fixture includes a base 1, a first clamping block 2, and a second clamping block 3. The first clamping block 2 and the second clamping block 3 are fixedly connected to the base 1. The first clamping block 2 is used to clamp the workpiece to be welded, and the second clamping block 3 is used to clamp another workpiece to be welded. A gap 4 is reserved between the first clamping block 2 and the second clamping block 3. During the welding process, the two workpieces to be welded are connected at the gap 4, so that the weld seam is exactly at the gap 4.

[0032] The first clamping block 2 and the second clamping block 3 have clearance mounting grooves 5 on their sidewalls near the gap 4. An air pipe 6 is installed in the clearance mounting groove 5 of the first clamping block 2, so that the air pipe 6 can be installed to the lower side of the gap 4. The air pipe 6 is made of hard metal material, and has multiple air blowing holes 61 on the side of the air pipe 6 near the gap 4. The air pipe 6 is connected to a protective gas. By setting multiple air blowing holes 61 on the air pipe 6 and connecting the air pipe 6 to the protective gas, the air blowing holes 61 can blow protective gas from the lower side of the gap 4 towards the gap 4 during processing.

[0033] During the specific processing, the protective gas source is connected to the gas pipe 6. One of the workpieces to be welded is placed on the first clamping block 2, and the other workpiece is placed on the second clamping block 3. The two workpieces are connected at the gap 4. Then, the connection position of the two workpieces is laser welded by the laser welding equipment. At this time, the protective gas flows in through the gas pipe 6 and is blown out through the blowing hole 61 to the gap 4. The protective gas is blown to the back of the weld to provide protection for the back of the weld.

[0034] Using this laser welding fixture allows for the blowing of protective gas onto the back of the weld during laser welding. This protective gas protects the back of the weld, reducing oxidation and blackening and effectively improving welding quality. Furthermore, by incorporating the clearance mounting groove 5, the gas pipe 6 is installed to the side and below the gap 4, reducing the problem of welding debris falling from the gap 4 and clogging the air blowing hole 61, thus improving processing stability.

[0035] In this embodiment, the clearance mounting groove 5 is recessed from the gap 4 towards the geometric center of the first clamping block 2 and the second clamping block 3, thereby creating a position for the air pipe 6 to be installed at the location of the clearance mounting groove 5, ensuring that the air pipe 6 can be installed to the side and below the gap 4. It should be noted that in this embodiment, the depth of the clearance mounting groove 5 is greater than the cross-sectional diameter of the air pipe 6, ensuring that after the air pipe 6 is installed in the clearance mounting groove 5, the entire air pipe 6 will not be directly below the gap 4; further reducing the problem of welding debris falling from the gap 4 and clogging the air blowing hole 61 during processing. In other embodiments, the depth of the clearance mounting groove 5 may also be the same as the cross-sectional diameter of the air pipe 6.

[0036] In other embodiments, the clearance mounting groove 5 may be provided only on one of the first clamping block 2 and the second clamping block 3; or the air pipe 6 may be installed on both the clearance mounting groove 5 on the first clamping block 2 and the second clamping block 3. This utility model does not limit this, as long as it ensures that the air pipe 6 is installed on the lower side of the gap 4, and that protective gas can be blown out from the lower side of the gap 4 towards the gap 4 through the air pipe 6.

[0037] To improve processing efficiency, the gap 4 is 8-15mm in size, preferably 10mm. To facilitate the installation of the air pipe 6, two mounting blocks 7 are provided on the clearance mounting groove 5. The mounting blocks 7 are fixedly connected to the first clamping block 2, and the air pipe 6 is connected to both mounting blocks 7, allowing it to rotate on the mounting blocks 7. By setting the mounting blocks 7, the air pipe 6 is confined within the clearance mounting groove 5, improving structural stability. The air pipe 6 and the mounting blocks 7 are rotatably connected, allowing adjustment of the orientation of the air blowing hole 61 to ensure that the air blowing hole 61 can blow protective gas towards the gap 4, improving practicality. During use, if it is found that the protective gas blown from the air blowing hole 61 cannot reach the gap 4, the operator can manually rotate the air pipe 6 to adjust the orientation of the air blowing hole 61 until the protective gas blown from the air blowing hole 61 can reach the gap 4.

[0038] In this embodiment, the air holes 61 are distributed in a straight line at equal intervals on the air pipe 6; in other embodiments, the air holes 61 may also adopt other distribution methods, such as being distributed in two staggered rows.

[0039] To ensure that the first clamping block 2 and the second clamping block 3 can stably hold the welding workpiece, magnetic elements 8 are respectively provided on the upper end surfaces of the first clamping block 2 and the second clamping block 3. During processing, after the welding workpiece is placed on the first clamping block 2 and the second clamping block 3, the magnetic elements 8 can attract the welding workpiece, allowing the two workpieces to connect at the gap 4, avoiding the problem of workpiece displacement during welding and improving the stability of processing.

[0040] In this embodiment, the magnetic components 8 are all electromagnets, and the electromagnets are externally powered. During processing, after the workpiece to be welded is placed on the upper surfaces of the first clamping block 2 and the second clamping block 3, the electromagnets are powered by an external power source, causing them to generate magnetism. This firmly attracts the workpiece to the upper surfaces of the first clamping block 2 and the second clamping block 3, preventing the workpiece from shifting during the welding process. In other embodiments, the magnetic components 8 can also be permanent magnets.

[0041] To position the workpiece for welding, a clamping and positioning assembly 9 is fixedly installed on one side of the base 1. A positioning block 91 is provided on the output end of the clamping and positioning assembly 9. The clamping and positioning assembly 9 can drive the positioning block 91 to extend into or out of the gap 4. In this embodiment, the clamping and positioning assembly 9 is located on the side of the second clamping block 3 away from the first clamping block 2. The operation of the clamping and positioning assembly 9 can drive the positioning block 91 past the second clamping block 3 and into the gap 4. By setting the positioning block 91, the installation position of the workpiece on the first clamping block 2 can be positioned, allowing the two workpieces to connect at the gap 4, improving operational convenience and processing stability.

[0042] In the specific processing, the positioning block 91 is driven by the clamping and positioning component 9 to extend past the second clamping block 3 into the gap 4. Then, the workpiece is placed on the first clamping block 2 so that the end face of the workpiece abuts against the positioning block 91. Then, the workpiece is attracted and fixed by the magnetic component 8. Then, the positioning block 91 is driven by the clamping and positioning component 9 to extend out of the gap 4. Then, another workpiece is placed on the second clamping block 3 so that the second workpiece is connected to the first workpiece at the position of the gap 4. Then, the second workpiece is attracted and fixed on the second clamping block 3 by the magnetic component 8. Then, laser welding is performed.

[0043] In other embodiments, the clamping and positioning component 9 may also be located on the side of the first clamping block 2 away from the second clamping block 3; the difference from this embodiment is that the workpiece on the second clamping block 3 is installed first during processing, and then the workpiece on the first clamping block 2 is installed, and other operation processes are the same as in this embodiment.

[0044] In this embodiment, there are two clamping and positioning components 9; in other embodiments, the number of clamping and positioning components 9 can be any other number.

[0045] The clamping and positioning assembly 9 includes a positioning seat 92 and a positioning cylinder 93. The positioning seat 92 is fixedly disposed on the side of the second clamping block 3 away from the first clamping block 2. In one embodiment, the positioning seat 92 can be fixedly connected to the base 1 or the second clamping block 3 by screws. The positioning cylinder 93 is mounted on the positioning seat 92 and is hinged to the positioning seat 92. The positioning cylinder 93 can rotate and swing along the hinge. One end of the positioning block 91 is hinged to the positioning seat 92, and the other end is a free end. The middle part of the positioning block 91 is hinged to the output end of the positioning cylinder 93. The positioning cylinder 93 can drive the positioning block 91 to rotate and swing on the positioning seat 92, so that the free end of the positioning block 91 extends into or out of the gap 4. During processing, the positioning cylinder 93 first drives the positioning block 91 to rotate and swing, causing the free end of the positioning block 91 to extend into the gap 4. Then, the workpiece is placed on the first clamping block 2, so that the end face of the workpiece abuts against the positioning block 91, which positions the workpiece. After the workpiece is fixed on the first clamping block 2, the positioning cylinder 93 drives the positioning block 91 to rotate and swing upwards, causing the positioning block 91 to move away from the gap 4. Then, the second workpiece is placed on the second clamping block 3, connecting the second workpiece to the first workpiece. Welding is then performed.

[0046] During processing, the laser welding fixture positions the workpiece on the first clamping block 2 using the positioning block 91, and then positions the workpiece on the second clamping block 3 using the workpiece on the first clamping block 2. This allows the two workpieces to be stably placed on the laser welding fixture, and the two workpieces can connect at the gap 4 between the two clamping blocks. This ensures that the weld seam during welding is exactly at the gap 4, and that the protective gas blown out of the air blowing hole 61 can reach the weld seam, thus improving the stability of the processing.

[0047] To facilitate the collection of welding debris, a slag-receiving plate 10 is provided between the first clamping block 2 and the second clamping block 3. The slag-receiving plate 10 is positioned directly below the gap 4 and is fixedly connected to both the first clamping block 2 and the second clamping block 3. A dust collection box 11 is provided at one end of the slag-receiving plate 10, which is sealed to the side end faces of both the first clamping block 2 and the second clamping block 3. An external suction device is connected to the dust collection box 11. During processing, welding debris falls through the gap 4 onto the slag-receiving plate 10, and the external suction device of the dust collection box 11 can remove the debris. By using the slag-receiving plate 10, the cleanliness of the laser welding fixture is improved, the time spent manually cleaning debris is reduced, and efficiency is increased.

[0048] To prevent debris from falling out of the slag receiving plate 10, a sealing cover 12 is provided at the end of the slag receiving plate 10 away from the dust collection box 11. The sealing cover 12 is sealed to the end faces of the first clamping block 2 and the second clamping block 3 away from the dust collection box 11. During processing, the sealing cover 12, the dust collection box 11, the slag receiving plate 10, the first clamping block 2, the second clamping block 3, and the workpiece being processed form a closed cavity, ensuring that welding slag debris can only fall onto the slag receiving plate 10, thereby ensuring the cleanliness of the processing table.

[0049] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.

Claims

1. A laser welding fixture, characterized in that, It includes a base, a first clamping block and a second clamping block, the first clamping block and the second clamping block are respectively connected to the base, the first clamping block is used to clamp a welding workpiece, the second clamping block is used to clamp another welding workpiece, and a gap is reserved between the first clamping block and the second clamping block. The first clamping block and / or the second clamping block have a clearance mounting groove on the side wall near the gap. An air pipe is provided in the clearance mounting groove. Multiple air blowing holes are provided on the side of the air pipe near the gap. Protective gas is connected to the outside of the air pipe.

2. The laser welding fixture according to claim 1, characterized in that, The clearance mounting groove is provided with multiple mounting blocks, and the air pipe is rotatably and limitably connected to the mounting blocks.

3. The laser welding fixture according to claim 1, characterized in that, The clearance mounting groove is recessed from the gap toward the geometric center of the first clamping block and / or the second clamping block, and the depth of the clearance mounting groove is greater than or equal to the cross-sectional diameter of the air tube.

4. The laser welding fixture according to claim 1, characterized in that, A clamping and positioning component is provided on one side of the base, and a positioning block is provided on the output end of the clamping and positioning component. The clamping and positioning component can drive the positioning block to extend into or out of the gap.

5. The laser welding fixture according to claim 4, characterized in that, The clamping and positioning assembly includes a positioning seat and a positioning cylinder. The positioning cylinder is hinged to the positioning seat, one end of the positioning block is hinged to the positioning seat, and the middle part of the positioning block is hinged to the output end of the positioning cylinder. The positioning cylinder can drive the positioning block to rotate and swing on the positioning seat.

6. The laser welding fixture according to claim 4, characterized in that, There are two clamping and positioning components.

7. The laser welding fixture according to claim 1, characterized in that, The size range of the gap is 8-15mm.

8. The laser welding fixture according to any one of claims 1-7, characterized in that, A slag receiving plate is provided directly below the gap. The slag receiving plate is connected to the first clamping block and the second clamping block respectively. A dust collection box is provided at one end of the slag receiving plate. The dust collection box is sealed to the side end face of the first clamping block and the second clamping block respectively. A suction device is connected to the outside of the dust collection box.

9. The laser welding fixture according to claim 8, characterized in that, The end of the slag receiving plate away from the dust collection box is provided with a sealing cover plate, and the sealing cover plate is respectively sealed to the end face of the first clamping block and the second clamping block away from the dust collection box.

10. The laser welding fixture according to claim 8, characterized in that, The upper end faces of the first clamping block and the second clamping block are respectively provided with magnetic elements.

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