Welding device for metal plate shell of filter

Abstract

The invention relates to the technical field of welding equipment, and discloses a filter metal plate shell welding device which comprises a welding machine, the welding machine is provided with an operation table and a welding cavity, an intelligent welding head with a visual recognition system is arranged in the welding cavity, a fixing tool capable of moving towards the welding cavity is arranged on the operation table, and the fixing tool comprises a supporting assembly. The supporting assembly is provided with two sets of horizontal bearing rods capable of rotating, the two sides of each bearing rod are provided with a driving rod and a tensioning rod respectively, and the tensioning rods are hinged to the supporting assembly through tensioning arms. The welding device for the metal plate shell of the filter is suitable for a cylindrical filter, and through the fixing mode that supporting of the bearing rod is matched with tightening of the pressing belt, the workpiece deformation risk can be remarkably reduced, and the equipment universality can be improved.

Description

Technical Field

[0001] This application relates to the field of welding equipment technology, and in particular to a welding device for a filter sheet metal housing. Background Technology

[0002] A filter is a device used to filter and separate impurities and contaminants from fluids (gas or liquid) to protect complex, precision, and expensive equipment.

[0003] In the structure of a filter, the outer shell, as the core component that supports the filter element and withstands the working pressure, is usually made of thin-walled metal or alloy materials to achieve a lightweight and compact design. However, this thin-walled structure is extremely prone to deformation under external forces during processing, especially in traditional mechanical clamping and hot working processes, which can easily lead to defects such as local instability, ellipticization, or warping, seriously affecting product accuracy and sealing performance.

[0004] Laser welding, as an advanced joining technology with high precision and high energy density, has become one of the mainstream processes for filter housing encapsulation due to its advantages such as concentrated heat input, small heat-affected zone, aesthetically pleasing weld formation, and high connection strength. Furthermore, laser welding supports non-contact processing, effectively avoiding physical friction between the tool and the workpiece, reducing additional stress, and is particularly suitable for the precision joining of thin-walled structural components. Combined with robotic automation systems, vision guidance, and AI intelligent control algorithms, laser welding production lines can achieve highly intelligent and flexible production, significantly improving welding consistency and production efficiency.

[0005] To ensure positioning accuracy and repeatability during the welding process, existing laser welding production lines are generally equipped with specialized tooling fixtures. These fixtures mechanically clamp the filter housing to prevent positional shifts caused by vibration, thermal expansion, or airflow disturbances during welding. Typically, the tooling system integrates proximity switches, displacement sensors, and other detection elements to determine whether the workpiece is in position and whether clamping is complete, thereby triggering the start of the welding program.

[0006] However, existing technical solutions still have the following prominent problems:

[0007] 1. Clamping can easily cause deformation: Due to the thin wall thickness and low rigidity of the filter shell, even if an elastic pressure head or soft contact surface is used during the clamping process of special tooling, it is still difficult to completely avoid local crushing or elastic instability, which leads to geometric deformation of the welding area, affects the matching of the weld trajectory and the quality of the molten pool formation, and may cause false welding, missing welding or sealing failure in severe cases.

[0008] 2. Poor tooling versatility: Different models and specifications of filters vary significantly in outer diameter, end cap structure, interface position, and layout of accessories, resulting in a single tooling fixture only being compatible with a specific product model. Manufacturers need to equip a large number of specialized fixtures for multiple types of filters, which not only increases equipment investment costs and warehousing management difficulties, but also reduces the flexibility of production line changeovers, making it difficult to meet the needs of intelligent manufacturing for small batches and multiple varieties.

[0009] 3. The contradiction between production cost and efficiency is prominent: Frequent changes and adjustments to tooling consume a lot of auxiliary time, reducing equipment utilization and overall production cycle; at the same time, the long design and manufacturing cycle of tooling makes it difficult to quickly respond to product iteration and customized order requirements, which restricts the enterprise's intelligent upgrading process. Summary of the Invention

[0010] This application proposes a sheet metal housing welding device for filters, which is suitable for cylindrical filters. The device uses a support rod to support the filter and a clamping band to tighten it, which can significantly reduce the risk of workpiece deformation and improve the versatility of the equipment.

[0011] To achieve the above objectives, this application adopts the following technical solution: a filter sheet metal shell welding device, including a welding machine, the welding machine having an operating table and a welding cavity, the welding cavity being equipped with an intelligent welding head with a vision recognition system, the operating table being equipped with a fixed fixture that can move toward the welding cavity, the fixed fixture including a support assembly, the support assembly being equipped with two sets of horizontal and rotatable support rods, the support rods being equipped with a drive rod and a tension rod on both sides respectively, the tension rod being hinged to the support assembly through a tension arm, a tension spring being provided between the tension arm and the support assembly, the drive rod and the tension rod being connected by an annular pressure band, when the workpiece is placed on the two sets of support rods, the pressure band can tighten the workpiece downwards;

[0012] The drive rod is rotatable and can drive the workpiece to rotate via the clamping belt;

[0013] Two sets of pressure rings are provided at the center between the two sets of drive rods. The two sets of pressure rings are opposite each other and can move closer or further apart. The pressure rings can rotate with the workpiece.

[0014] Furthermore, the support assembly includes a movable plate with mounting grooves at both ends. Two sets of adjusting blocks are fixedly installed in the mounting grooves, and the support rods are movably connected to the adjusting blocks. Multiple sets of mounting holes are provided on the mounting grooves, and fastening screws pass through these holes to fix the adjusting blocks. This allows for adjustment of the distance between the two sets of support rods to accommodate workpieces of different sizes.

[0015] Furthermore, to avoid protrusions or attachments on the workpiece, the support rod supports the workpiece via support cylinders. Each support rod has at least two sets of support cylinders. The support cylinders elevate the workpiece, preventing protrusions or attachments on the workpiece from colliding with the support rod. The support cylinders have several slots, in which clamping screws are installed. The clamping screws clamp the support rod, with the heads of the clamping screws below the surface. After the clamping screws are loosened, the support cylinders can be freely adjusted to accommodate a certain type of workpiece.

[0016] Furthermore, both the tensioning rod and the drive rod are connected to the clamping band via a drive sleeve. The drive sleeve has several slots, in which clamping screws are installed. The heads of the clamping screws are lower than the surface of the drive sleeve. This allows adjustment of the position of the clamping band, thereby avoiding protrusions or attachments on the workpiece.

[0017] Furthermore, baffles are provided on both sides of the drive sleeve, and the distance between the baffle on the drive sleeve and the moving plate on the drive rod is less than the thickness of the clamping band. After the clamping band loosens, the baffle on the drive sleeve on the tension rod adheres to the moving plate under the action of elasticity. This ensures that the clamping band will never fall off the drive sleeve due to loosening.

[0018] Furthermore, to reduce the friction between the workpiece and the support rod, the fixed fixture also includes a drive assembly, which includes a motor located between the two sets of support rods. The output shaft of the motor is connected to the support rods on both sides via a transmission belt. The output shaft of the motor or the support rod is connected to the drive rod via a gear set. The number of gears on the gear set is even, so that the linear velocities of the two are the same. The linear velocities of the drive sleeve, the clamping belt, and the support cylinder are all the same.

[0019] Furthermore, the pressure ring has multiple pressure bars capable of clamping the workpiece, and the pressure bars have elastic contact heads. This clamps the workpiece, preventing the filter cartridge and end cap from separating.

[0020] Furthermore, the pressure ring is movably connected to a connector, and a bearing is provided between the connector and the pressure ring. The connector is connected to the support plate through a swing sleeve, which is made of a flexible material and has elasticity.

[0021] Furthermore, to prevent the pressure ring from deviating too much from the center and affecting the clamping of the workpiece, the pressure ring is fixedly connected to a connecting rod. The connecting rod passes through the center of the pressure ring, and a positioning head is connected to the end of the connecting rod. The inner diameter of the pressure ring is the same as the outer diameter of the positioning head. The positioning head has a tapered surface on the side near the support plate. The outer diameter of the connecting rod is smaller than the inner diameter of the pressure ring. When the pressure rings on both sides clamp the workpiece, the positioning head passes through the pressure ring. When the workpiece is removed, the swing sleeve is pulled back by the elastic force, so that the pressure ring is centered.

[0022] The beneficial effects of this invention are as follows:

[0023] This application provides a filter sheet metal housing welding device, in which a support rod supports and a clamping band tightens the fixing method, so that the workpiece and the support rod and the workpiece and the clamping band always maintain a large contact area, so that stress concentration will not occur due to the posture of the workpiece. Moreover, compared with the active clamping method, the pressure is relatively small, which can reduce the risk of the workpiece being squeezed and deformed, ensure the quality of the weld, and ensure the sealing performance.

[0024] It can adapt to most cylindrical filters and is compatible with the layout of various accessories, which can reduce the use of special tooling, improve the flexibility of the production line, meet the needs of intelligent manufacturing for small batches and multiple varieties, and at the same time, the reduction in the use of special tooling also saves a lot of auxiliary time spent on changing and debugging tooling, improves equipment utilization and ensures production cycle. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort:

[0026] Figure 1 This is a schematic diagram of the present application;

[0027] Figure 2 This is a schematic diagram of the fixed tooling in this application;

[0028] Figure 3 For this application Figure 2 Top view;

[0029] Figure 4 This is a schematic diagram of the right rear view in this application;

[0030] Figure 5 This is a schematic diagram of the right front view in this application.

[0031] In the diagram: 1. Welding machine; 2. Operating table; 3. Welding chamber; 4. Intelligent welding head; 5. Fixed fixture; 511. Moving plate; 512. Mounting slot; 513. Adjusting block; 514. Support rod; 515. Support cylinder; 516. Adjusting hole; 521. Drive rod; 522. Drive sleeve; 523. Pressure belt; 524. Tensioning rod; 525. Tensioning arm; 526. Tension spring; 531. Pressure ring; 532. Fixed table; 533. Moving table; 534. Positioning head; 535. Pad; 536. Support plate; 537. Connecting rod; 538. Swing sleeve; 539. Connecting head; 541. Motor; 542. Transmission belt; 543. Gear set; 6. Workpiece. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figure 1 A filter sheet metal shell welding device is applicable to filters with cylindrical features. It includes a welding machine 1, which has an operating table 2 and a welding cavity 3. The welding cavity 3 is equipped with an intelligent welding head 4 with a vision recognition system. The vision recognition system identifies the weld position through image recognition and guides the laser position accordingly to weld the shell. The operating table 2 is equipped with a fixed fixture 5 and a corresponding drive structure. The drive structure drives the fixed fixture 5 into or out of the welding cavity 3. The fixed fixture 5 moves along a slide rail. To improve production efficiency, the welding machine 1 is set as a dual-station unit. The fixed fixture 5 in one station moves into the welding cavity 3 for welding, while the fixed fixture 5 in the other station is on the outside for clamping the workpiece 6.

[0034] Please see Figures 2-3 The fixed fixture 5 includes a support assembly, which includes a movable plate 511. Both ends of the movable plate 511 have mounting grooves 512. Two sets of adjusting blocks 513 are fixedly installed in the mounting grooves 512. Support rods 514 are provided between the adjusting blocks 513 at both ends. The support rods 514 on the two sets of adjusting blocks 513 are horizontal. Bearings are provided between the adjusting blocks 513 and the support rods 514, allowing the support rods 514 to rotate freely. To adjust the spacing and position of the two sets of support rods 514, the mounting groove 512 has multiple sets of mounting holes. Fastening screws pass through the mounting holes to fix the adjusting blocks 513. The workpiece 6 is placed between the two support rods 514 and is supported by them. To avoid protrusions or attachments on the workpiece 6, the support rods 514... 14. The workpiece 6 is supported by the support cylinder 515. Each support rod 514 is provided with two sets of support cylinders 515. The support cylinders 515 support the workpiece 6 and prevent the protrusions or accessories on the workpiece 6 from colliding with the support rods 514. The support cylinders 515 are provided with several holes and slots. Clamping screws are installed in the holes and slots. The clamping screws clamp the support rods 514. The head of the clamping screw is lower than the surface of 515. After the clamping screw is loosened, the position of the support cylinder 515 can be freely adjusted to adapt to a certain type of workpiece 6. After the clamping screw is locked, the position of the support cylinder 515 is fixed. According to the size of the workpiece 6, the distance between the two support rods 514 is adjusted to achieve stable support of the workpiece 6. The included angle between the contact position of the workpiece 6 and the two support cylinders 515 is between 90 and 120 degrees.

[0035] During welding, the workpiece 6 rotates on the support rod 514. To prevent the workpiece 6 from jumping, the fixing fixture 5 includes a clamping assembly. The clamping assembly includes a drive rod 521, a tension rod 524, and a clamping band 523. The clamping band 523 passes around the workpiece 6, the drive rod 521, and the tension rod 524. The drive rod 521 and the tension rod 524 are higher than the highest point of the workpiece 6, applying downward pressure to the workpiece 6 in a tightening manner, so that the workpiece 6 is tightly attached to the support rod 514, preventing the position of the workpiece 6 from changing. In this embodiment, the drive rod 521 and... The height of the tension rod 524 is lower than that of the support rod 514. The support rod 514 supports and works in conjunction with the clamping band 523 to maintain a large contact area between the workpiece 6 and the support rod 514, as well as between the workpiece 6 and the clamping band 523. Furthermore, compared to the active clamping method, the pressure is relatively small, which reduces the risk of the workpiece 6 being squeezed and deformed. To keep the clamping band 523 taut, the tension rod 524 is hinged to the moving plate 511 via the tension arm 525. A tension spring 526 is provided between the tension arm 525 and the moving plate 511. The elastic force of the tension spring 526 causes the tension arm 525 to tend to rotate and move away from the workpiece 6. In other embodiments, the tension arm 525 can also be actively swung by a motor to loosen or tighten it. Both the tension rod 524 and the drive rod 521 are connected to the pressure band 523 through the drive sleeve 522. The drive sleeve 522 has a similar structure to the support cylinder 515. The position of the drive sleeve 522 is locked by a locking screw to adjust the position of the pressure band 523, thereby avoiding protrusions or accessories on the workpiece 6. The drive sleeve 522 has two sides. There is a baffle, and the baffle of the drive sleeve 522 on the drive rod 521 is close enough to the moving plate 511. After the clamping band 523 is loosened, the baffle of the drive sleeve 522 on the tension rod 524 sticks to the moving plate 511 under the action of elasticity, so that the clamping band 523 will never fall off the drive sleeve 522. The drive rod 521 is connected to the moving plate 511 through the bracket. The drive rod 521 is rotatably connected to the bracket. The drive rod 521 can rotate. The rotation of the drive rod 521 drives the clamping band 523 to rotate. The clamping band 523 drives the workpiece 6 to rotate through friction.

[0036] When workpiece 6 rotates, if the support rod 514 is stuck, the friction between workpiece 6 and support rod 514 may cause workpiece 6 to be unstable. To reduce the friction between workpiece 6 and support rod 514, support rod 514 rotates actively and maintains the same speed as workpiece 6. Fixture 5 also includes a drive assembly, which includes a motor 541. The output shaft of motor 541 is connected to support rod 514 via transmission belt 542. The two support rods 514 rotate at the same speed and in the same direction. The output shaft of motor 541 or support rod 514 is connected to drive rod 521 via gear set 543. Since support rod 514 and workpiece 6 are in close contact, the movement direction of the contact point is the same only when their rotation speeds are opposite. Therefore, the number of gears on gear set 543 is even, so that the rotation direction of drive rod 521 is opposite to that of support rod 514. The size of support cylinder 515 and drive sleeve 522 is adjusted so that their linear velocities are the same, thereby ensuring that the linear velocities of workpiece 6 and support cylinder 515 are the same.

[0037] To clamp the end cap and cylinder of workpiece 6, the fixing fixture 5 also includes a clamping assembly, which includes a pressure ring 531. One side of the pressure ring 531 is connected to the fixed platform 532, and the other side of the pressure ring 531 is movably connected to the moving platform 533. The movement of the moving platform 533 drives the pressure ring 531 to move, clamping the end cap and cylinder of workpiece 6. At the same time, the pressure ring 531 has multiple pressure rods to clamp the workpiece 6. Meanwhile, to prevent the accessories on the workpiece 6 from colliding with the pressure rods when the workpiece 6 rotates, the pressure ring 531 rotates synchronously with the workpiece 6.

[0038] Please see Figure 4 and Figure 5 The pressure ring 531 is movably connected to the connector 539, and a bearing is provided between the connector 539 and the pressure ring 531. The connector 539 is connected to the support plate 536 through the swing sleeve 538. The swing sleeve 538 is made of flexible material and is elastic. The bottom of the support plate 536 is connected to the fixed platform 532 or the moving platform 533 through the pad 535. The height of the pressure ring 531 is adjusted by the thickness of the pad 535 so that the center of the pressure ring 531 is close to the center of the workpiece 6 to accommodate filters of different sizes and specifications. When the center of the pressure ring 531 is different from that of the workpiece 6, the connector 539 will swing to adapt to the center of the workpiece 6.

[0039] Because the swing sleeve 538 is flexible, the pressure ring 531 may deviate too much from the center, affecting the clamping of the workpiece 6. Therefore, a connecting rod 537 is fixedly connected to the pressure ring 531. The connecting rod 537 passes through the center of the pressure ring 531, and a positioning head 534 is connected to the end of the connecting rod 537. The inner diameter of the pressure ring 531 is the same as the outer diameter of the positioning head 534. The positioning head 534 has a tapered surface on the side near the support plate 536 to guide insertion into the pressure ring 531. The outer diameter of the connecting rod 537 is smaller than... When the pressure rings 531 on both sides clamp the workpiece 6, the pressure rings 531 compress the rocker sleeve 538, and the positioning head 534 passes through the pressure rings 531. The outer diameter of the connecting rod 537 is much smaller than the inner diameter of the pressure rings 531, so the pressure rings 531 can swing freely to adapt to the rocker of the pressure rings 531. When the workpiece 6 is removed, the rocker sleeve 538 is pulled back by the elastic force, so that the pressure rings 531 are centered and the positions of the pressure rings 531 are approximately the same. The pressure rod on the pressure rings 531 has an elastic contact head.

[0040] During welding, the worker first puts the end cap of workpiece 6 and the filter cartridge together, pulls up the clamping band 523, places workpiece 6 on the support rod 514, and then controls the moving table 533 to move. The pressure rings 531 on both sides press against workpiece 6 to prevent the end cap of workpiece 6 from falling off. Then, the welding button is pressed, and the moving plate 511 moves into the welding chamber 3. At the same time, the motor rotates, and the support rod 514, the clamping band 523 and workpiece 6 rotate synchronously. The vision recognition system on the intelligent welding head 4 identifies the weld position and determines whether the weld meets the welding standard. If it meets the welding standard, the laser is emitted to weld the weld.

[0041] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A filter sheet metal housing welding device, comprising a welding machine (1), the welding machine (1) having an operating table (2) and a welding chamber (3), wherein an intelligent welding head (4) with a vision recognition system is provided in the welding chamber (3), and a fixed fixture (5) capable of moving toward the welding chamber (3) is provided on the operating table (2), characterized in that... ； The fixed fixture (5) includes a support assembly, on which two sets of horizontal and rotatable support rods (514) are provided. On both sides of the support rods (514) are a drive rod (521) and a tension rod (524). The tension rod (524) is hinged to the support assembly through a tension arm (525). A tension spring (526) is provided between the tension arm (525) and the support device. A ring-shaped pressure band (523) is connected between the drive rod (521) and the tension rod (524). When the workpiece (6) is placed on the two sets of support rods (514), the pressure band (523) can tighten the workpiece (6) downwards. The drive rod (521) is rotatable and can drive the workpiece (6) to rotate via the clamping belt (523); Two sets of pressure rings (531) are provided at the center between the two sets of drive rods (521). The two sets of pressure rings (531) are opposite each other and can move closer or further away. The pressure rings (531) can rotate with the workpiece (6).

2. The filter sheet metal housing welding device according to claim 1, characterized in that, The support assembly includes a movable plate (511), with mounting slots (512) at both ends of the movable plate (511). Two sets of adjusting blocks (513) are fixedly installed in the mounting slots (512). The support rod (514) is movably connected to the adjusting blocks (513). The mounting slots (512) are provided with multiple sets of mounting holes, and fastening screws pass through the mounting holes to fix the adjusting blocks (513).

3. The filter sheet metal housing welding device according to claim 1, characterized in that, The support rod (514) supports the workpiece (6) through the support cylinder (515). Each support rod (514) is provided with at least two sets of support cylinders (515). The support cylinder (515) is provided with several holes and slots. Clamping screws are installed in the holes and slots. The clamping screws clamp the support rod (514). The head of the clamping screw is lower than the surface of (515).

4. The filter sheet metal housing welding device according to claim 2, characterized in that, The tension rod (524) and the drive rod (521) are both connected to the pressure band (523) through the drive sleeve (522). The drive sleeve (522) has several holes and slots, and clamping screws are installed in the holes and slots. The head of the clamping screws is lower than the surface of the drive sleeve (522).

5. The filter sheet metal housing welding device according to claim 4, characterized in that, Both sides of the drive sleeve (522) are provided with baffles, and the distance between the baffle of the drive sleeve (522) on the drive rod (521) and the moving plate (511) is less than the thickness of the pressing band (523). After the pressing band (523) is loosened, the baffle of the drive sleeve (522) on the tension rod (524) sticks to the moving plate (511) under the action of elastic force.

6. The filter sheet metal housing welding device according to claim 4, characterized in that, The fixed fixture (5) also includes a drive assembly, which includes a motor (541). The motor (541) is located between two sets of support rods (514). The output shaft of the motor (541) is connected to the support rods (514) on both sides via a transmission belt (542). The output shaft of the motor (541) or the support rod (514) is connected to the drive rod (521) via a gear set (543). The number of gears on the gear set (543) is even, so that the linear speeds of the two are the same. The linear speeds of the drive sleeve (522), the pressing belt (523), and the support cylinder (515) are all the same.

7. The filter sheet metal housing welding device according to claim 1, characterized in that, The pressure ring (531) has a plurality of pressure bars that can press against the workpiece (6), and the pressure bars have elastic contact heads.

8. The filter sheet metal housing welding device according to claim 7, characterized in that, The pressure ring (531) is movably connected to a connector (539), and a bearing is provided between the connector (539) and the pressure ring (531). The connector (539) is connected to the support plate (536) through a swing sleeve (538), which is made of a flexible material and has elasticity.

9. The filter sheet metal housing welding device according to claim 8, characterized in that, The pressure ring (531) is fixedly connected to a connecting rod (537). The connecting rod (537) passes through the center of the pressure ring (531). The end of the connecting rod (537) is connected to a positioning head (534). The inner diameter of the pressure ring (531) is the same as the outer diameter of the positioning head (534). The positioning head (534) has a conical surface on the side near the support plate (536). The outer diameter of the connecting rod (537) is smaller than the inner diameter of the pressure ring (531). When the pressure rings (531) on both sides clamp the workpiece (6), the positioning head (534) passes through the pressure ring (531). When the workpiece (6) is removed, the swing sleeve (538) is pulled back by the elastic force, so that the pressure ring (531) is centered.

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