Welding equipment for stainless steel sieve plate machining

Abstract

The invention discloses welding equipment for stainless steel sieve plate processing, which belongs to the field of metal sieve plate processing and comprises a rack, a control system, a special worktable and a welding execution unit. The workbench is provided with a vacuum adsorption platform and a multi-dimensional adjusting frame clamp and used for fixing the sieve plate and the frame. The welding execution unit is composed of a multi-axis mechanical arm and a composite welding gun module, and the welding gun module integrates a main welding gun, a following type water-cooling chilling device, a protective gas hood and a dust suction nozzle. And the control system realizes full-automatic control. By means of the core process of low-heat input welding and instant chilling after welding, the technical problems that the stainless steel thin-wall sieve plate is prone to deformation and burning through during welding and sieve holes are prone to being blocked by welding slag are effectively solved, and high-quality, high-efficiency and automatic stainless steel sieve plate welding production is achieved.

Description

Technical Field

[0001] This invention relates to the field of metal screen plate processing, and more particularly to a welding equipment for processing stainless steel screen plates. Background Technology

[0002] Stainless steel screen plates are widely used in filtration, screening, and separation components in chemical, food, mining, and aerospace industries. Their manufacturing process typically requires welding the plate with densely packed screen holes to the outer frame or internal reinforcing ribs to ensure overall structural strength and dimensional stability. Currently, this type of welding is mostly done manually using general-purpose argon arc welding machines or resistance spot welding machines, which has the following significant drawbacks: Inefficient and inconsistent: Manual point-by-point welding is extremely time-consuming, especially for large sieve plates or densely packed weld points. Furthermore, the quality of the weld points is greatly affected by the worker's skill and condition, making it difficult to guarantee consistency.

[0003] Risks of deformation and burn-through: Stainless steel thin plates (especially screen plates with a thickness of less than 2mm) have poor thermal conductivity. Improper control of welding heat input can easily lead to local overheating, causing the screen plate to wavy and deform, or even burn through the edge of the screen holes, affecting the filtration accuracy and appearance.

[0004] Weld spatter clogging the screen holes: Welding spatter may clog the surrounding tiny screen holes, making subsequent cleaning difficult and affecting product performance.

[0005] Low level of automation: General-purpose equipment lacks dedicated clamping, positioning, and welding path planning for the characteristics of the sieve plate, making it difficult to achieve automated continuous production.

[0006] Therefore, there is an urgent need to develop a specialized automated equipment that can efficiently and effectively complete the welding of stainless steel screen plates and effectively control deformation and spatter. Summary of the Invention

[0007] In view of the shortcomings of the prior art, the present invention provides a welding equipment for processing stainless steel screen plates, which overcomes the shortcomings of the prior art and aims to solve the problems in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a welding equipment for processing stainless steel screen plates, comprising an equipment frame, a control system, a welding execution unit, and a movable worktable mounted on the equipment frame.

[0009] The mobile workbench includes: A vacuum adsorption platform made of a highly thermally conductive material has a dense array of adsorption holes on its top surface that connects to a negative pressure generator. This array is used to adsorb and fix a stainless steel sieve plate. The platform can both flatten and fix the workpiece and quickly dissipate heat from the welding area, reducing heat accumulation.

[0010] A multi-dimensional adjustable frame clamp is set around the vacuum adsorption platform. The frame clamp includes clamping arms that can be adjusted along the X, Y, Z directions and the rotation direction. It is used to accurately position and clamp the frame or reinforcing rib profile to be welded, ensuring that it fits tightly with the screen plate.

[0011] The welding execution unit includes: A high-precision three-axis or more-axis linkage robotic arm is mounted on the equipment frame.

[0012] A composite welding torch module mounted on the end effector of a robotic arm. This module includes at least: Main welding torch: Use a pulsed metal inert gas welding (pulse MIG welding) torch or a cold metal transfer (CMT) torch, with the welding wire aligned with the seam to be welded.

[0013] Follow-up water-cooled quenching device: Its outlet is located close to the rear of the molten pool of the main welding torch, and it can spray a fine stream of coolant (such as water or special coolant) to quickly cool the newly solidified weld bead.

[0014] Lateral protective gas shield: Covers the welding area, providing additional inert gas protection to prevent oxidation in high-temperature areas.

[0015] Integrated dust and smoke extraction nozzle: Located above the welding area, it promptly removes welding fumes and any small splashes that may be generated.

[0016] The control system includes a main controller, a human-machine interface, a path planning module, and a parameter management database.

[0017] The path planning module can automatically generate the optimal welding path and robotic arm movement trajectory based on the input stainless steel sieve plate drawings (including border dimensions and reinforcing rib positions).

[0018] The parameter management database pre-stores welding process parameters (such as pulse current, voltage, wire feeding speed, coolant flow rate, robotic arm walking speed, etc.) corresponding to stainless steel screen plates of different thicknesses and materials, and can automatically match parameter groups according to the selected plate material.

[0019] The main controller coordinates and controls the movement of the robotic arm, the welding power supply, negative pressure adsorption, coolant injection, protective gas supply, and the start, stop, and timing of fume extraction.

[0020] Furthermore, the vacuum adsorption platform is internally equipped with a circulating cooling water pipeline, which is connected to an external chiller to achieve active cooling of the platform.

[0021] Furthermore, the spray angle and distance from the molten pool of the follow-type water-cooled quenching device can be adaptively adjusted by a micro servo mechanism.

[0022] Furthermore, the equipment also includes a vision positioning system located on one side of the workbench, which is used to acquire images and calculate deviations of the actual position of the sieve plate and frame before welding. The control system performs path compensation to improve the fault tolerance of tooling errors.

[0023] Furthermore, a coolant collection and processing system is provided below the mobile workbench, and the coolant collection and processing system includes a collection tank and a filtration and recovery system for collecting and processing used coolant.

[0024] The beneficial effects of this invention are: High automation and high efficiency: It achieves a high degree of automation from clamping and positioning to welding, and is especially suitable for rapid production changeover of multi-variety, small-batch screen plates. Welding efficiency is several times higher than manual welding.

[0025] Superior welding quality: By combining pulsed MIG / CMT low heat input welding with immediate post-weld water cooling, welding thermal deformation and heat-affected zone are minimized, avoiding the risk of screen plate wavy deformation and burn-through. The weld formation is beautiful and has good consistency.

[0026] Effectively prevents screen clogging: The low-spatter welding process, combined with timely fume and spatter extraction, significantly reduces the probability of weld slag clogging adjacent screen holes.

[0027] Good adaptability: The multi-dimensional adjustable fixture and vision positioning system (5) enable the equipment to adapt to the welding requirements of sieve plates of different sizes and structures (such as those with internal reinforcing ribs), and it has strong versatility.

[0028] Improved working environment: The integrated design reduces the impact of welding fumes and heat radiation on operators. Attached Figure Description

[0029] Figure 1 This is a 3D structural schematic diagram of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a top view of the present invention; Figure 4 This is a schematic diagram of the front structure of the present invention.

[0030] In the diagram: 1. Equipment frame; 2. Moving workbench; 21. Vacuum adsorption platform; 211. Adsorption hole; 22. Multi-dimensional adjustable frame clamp; 3. Robotic arm; 4. Composite welding torch module; 41. Main welding torch; 42. Follow-up water-cooled quenching device; 43. Lateral protective gas hood; 44. Dust extraction and fume removal nozzle; 5. Vision positioning system; 6. Control system; 7. Human-machine interface; 8. Coolant collection and treatment system. Detailed Implementation

[0031] 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. Example

[0032] Please see Figure 1 - Figure 4 A welding device for processing stainless steel screen plates includes a frame 1, a control system 6, and a welding execution unit. Its distinguishing feature is that it further includes a dedicated movable worktable 2 mounted on the frame 1. The movable worktable 2 includes a vacuum adsorption platform 21 for adsorbing and fixing the stainless steel screen plate, and a multi-dimensional adjustable frame clamp 22 for holding and positioning the frame or reinforcing ribs. The vacuum adsorption platform 21 is made of a high thermal conductivity metal material and has an embedded circulating cooling pipeline. The welding execution unit includes a high-precision multi-axis robotic arm 3 and a composite welding gun module 4 mounted at the end of the robotic arm 3. The composite welding gun module 4 integrates at least a main welding gun 41 and a follower for instant cooling of the weld bead. The equipment includes a water-cooled quenching device 42, a side protective gas hood 43, and a dust extraction and fume removal nozzle 44. The main welding torch 41 is a pulsed consumable electrode inert gas shielded welding torch or a cold metal transfer welding torch. The spray angle and distance of the following water-cooled quenching device 42 are adjustable. A vision positioning system 5 is installed inside the equipment frame 1 for visual recognition of the workpiece and welding path compensation. The control system 6 includes a path planning module and a welding process parameter database, which can automatically generate welding paths and match welding parameters according to the input product information. The control system 6 is used to coordinate and control the moving worktable 2, the welding execution unit, and various auxiliary devices to work together according to a predetermined program. A coolant collection and treatment system 8 is installed under the moving worktable 2.

[0033] Working principle: The operator places the sieve plate on the vacuum adsorption platform 21 and starts adsorption. The frame / reinforcing rib is clamped in the multi-dimensional adjustable frame fixture 22 and adjusted to fit the plate. The product model is selected through the human-machine interface, and the control system 6 calls the preset welding program. During welding, the robotic arm 3 drives the composite welding gun module 4 to move along the planned path. Pulse MIG or CMT processes achieve low heat input and minimal spatter welding. The water-cooling quench device that follows quickly cools the weld, greatly reducing the heat-affected zone and effectively suppressing sieve plate deformation. The lateral protective gas hood 43 and the dust extraction and fume removal nozzle 44 ensure a clean welding environment.

[0034] During operation, the vacuum adsorption platform 21 flattens the 0.8mm thick 304 stainless steel sieve plate, and the multi-dimensional adjustable frame clamp 22 clamps and presses the 20mm wide flat steel frame. The vision positioning system 5 takes pictures to calibrate the position. The operator selects the "0.8mm plate + flat steel frame" program through the human-machine interface 7. The robotic arm 3 drives the composite welding gun module 4 to automatically weld along the frame. The main welding gun 41 adopts CMT process, and the post-weld follow-up water cooling device 42 sprays water for cooling. The side protective air hood 43 and the dust and smoke extraction nozzle 44 work throughout the process. After welding, the sieve plate is flat, with no visible deformation, uniform weld beads, and no blockage in adjacent sieve holes.

[0035] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention 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 embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A welding device for processing stainless steel screen plates, comprising a machine frame (1), a control system (6), and a welding execution unit, characterized in that: It also includes a dedicated mobile worktable (2) set on the equipment rack (1); The mobile workbench (2) includes a vacuum adsorption platform (21) for adsorbing and fixing the stainless steel screen plate, and a multi-dimensional adjustable frame clamp (22) for clamping and positioning the frame or reinforcing rib. The welding execution unit includes a high-precision multi-axis robotic arm (3) and a composite welding gun module (4) installed at the end of the robotic arm (3); the composite welding gun module (4) integrates at least a main welding gun (41), a follow-up water cooling device (42) for instant cooling of the weld bead, a side protective gas hood (43) and a dust extraction and fume removal nozzle (44). The control system (6) is used to coordinate and control the moving workbench (2), the welding execution unit and each auxiliary device to work together in a predetermined program.

2. The welding equipment for processing stainless steel screen plates according to claim 1, characterized in that, The vacuum adsorption platform (21) is made of a high thermal conductivity metal material and has an internal circulating cooling pipeline.

3. The welding equipment for processing stainless steel screen plates according to claim 1, characterized in that, The main welding torch (41) is a pulsed consumable electrode inert gas shielded welding torch or a cold metal transfer welding torch.

4. The welding equipment for processing stainless steel screen plates according to claim 1, characterized in that, A visual positioning system (5) is installed inside the equipment frame (1) for visual recognition of workpieces and welding path compensation.

5. The welding equipment for processing stainless steel screen plates according to claim 1, characterized in that, The control system (6) includes a path planning module and a welding process parameter database, which can automatically generate welding paths and match welding parameters based on the input product information.

6. The welding equipment for processing stainless steel screen plates according to claim 1, characterized in that, The spray angle and distance of the following water-cooled quenching device (42) are adjustable.

7. The welding equipment for processing stainless steel screen plates according to claim 1, characterized in that, The mobile workbench (2) is equipped with a coolant collection and treatment system (8).

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