A container rear corner post tracking welding device

Abstract

This invention provides a container rear corner post tracking welding device, including a welding frame body. The welding frame body consists of multiple supporting columns and crossbeams fixedly connected to the upper ends of the columns. A rack and pinion traveling mechanism is mounted on the crossbeams, and a connecting rod is fixedly connected to the rack and pinion traveling mechanism. A first curved plate is rotatably connected to the lower part of the connecting rod. A first cylinder is fixedly mounted on the horizontal plate of the first curved plate, and a first slide rail is fixedly mounted on the vertical plate of the first curved plate. A mounting plate is slidably connected to the first slide rail, and a welding torch and a guide wheel are fixedly connected to the mounting plate. This invention employs mechanical contouring. During welding, the rack and pinion traveling mechanism and a dual mechanical contouring mechanism consisting of a guide wheel with a V-groove and a compression spring are integrated. The guide wheel travels along the contour of the rear corner post channel steel, thereby achieving synchronous adjustment of the welding torch position and the guide wheel's travel trajectory, ultimately realizing tracking contouring welding.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and in particular to a container rear corner post tracking welding device. Background Technology

[0002] The existing container rear corner posts are welded from bent parts and channel steel standing on the bent parts (see...). Figure 6 The channel steel and the bent component are joined together by two symmetrical fillet welds. Currently, the industry primarily uses two methods to weld the channel steel and the bent component together: laser-tracking automatic welding and manual welding.

[0003] Laser-tracking automatic welding machines combine a walking frame with a laser tracking system. Laser tracking enables automatic tracking based on the weld seam's trajectory, and the signal is processed by a processor to adjust the welding torch position. However, laser-tracking automatic welding equipment requires highly skilled maintenance workers; it has high manufacturing costs and a long investment recovery period; and it demands a high-quality operating environment free from smoke and dust pollution. Therefore, it is not suitable for use in sheet metal manufacturing processes such as container production.

[0004] Manual welding requires a high level of worker skill, and the welding quality is unstable due to the difference in worker skill level; it is impossible to work on two welds at the same time, the welding time is long and the efficiency is low, at least twice as long as automatic welding; in addition, manual welding cannot be pre-deformed and compressed, and a special process is required to straighten it after manual welding.

[0005] Chinese invention patent CN105921856B, entitled "Automatic Tracking Auxiliary Welding Device for Fillet Welds," provides a welding device with a relatively lower cost compared to laser tracking automatic welding machines. Its specific structure includes: "a main directional beam, a mounting plate frame on the main directional beam, longitudinal guide rails symmetrically arranged at the lower part of the mounting plate frame, and longitudinal sliding plates symmetrically mounted on the longitudinal guide rails; lifting first cylinders symmetrically mounted on the mounting plate frame, with the lower end of the cylinder rod of the lifting first cylinder elastically connected to the corresponding longitudinal sliding plate; horizontal first cylinders and horizontal sliders are respectively arranged on the longitudinal sliding plates, and transverse sliding plates are mounted through the horizontal sliders; one end of the cylinder rod of the horizontal first cylinder is elastically connected to the transverse sliding plate on the same side; and welding torch mounting sleeves are respectively arranged in front of the transverse sliding plates."

[0006] However, this device has two primary cylinders. During operation, the welding torch adjusts its vertical and longitudinal positions according to changes in the weld seam position by controlling these two cylinders. Channel steel is produced through hot rolling or cold bending processes, and its straightness and flatness tolerances are much larger than those of machined parts. The patent document does not describe specifically how the movement of the two primary cylinders is controlled according to changes in the shape and size of the channel steel, but it is conceivable that this device cannot achieve this; that is, it cannot achieve automatic tracking. Summary of the Invention

[0007] In view of this, the present invention provides a container rear corner post tracking welding device that integrates a rack and pinion walking mechanism and a dual mechanical contouring mechanism, utilizes guide wheels to follow the contour of the rear corner post channel steel, and adjusts the position of the welding torch in real time according to the linear change trajectory of the apex angle of the channel steel, thereby realizing contour welding.

[0008] To this end, this application provides the following technical solution: a container rear corner post tracking welding device, comprising a welding frame body, the welding frame body being composed of multiple supporting columns and a crossbeam fixedly connected to the upper end of the columns, a worktable for placing the rear corner post to be welded being fixedly connected between the columns, a rack and pinion traveling mechanism being mounted on the crossbeam, a connecting rod being fixedly connected to the rack and pinion traveling mechanism, the connecting rod being able to reciprocate linearly along the direction of the crossbeam under the drive of the rack and pinion traveling mechanism; a first curved plate being rotatably connected to the lower part of the connecting rod, a first cylinder being fixedly mounted on the horizontal plate of the first curved plate, a first slide rail being fixedly mounted on the vertical plate of the first curved plate, an mounting plate being slidably connected to the first slide rail, the mounting plate being connected to the piston rod of the first cylinder through an elastic element; a welding torch and a guide wheel being fixedly connected to the mounting plate, the welding torch being positioned on the outside of the guide wheel relative to the crossbeam.

[0009] Furthermore, the rack and pinion traveling mechanism includes: a second slide rail fixed on the crossbeam and arranged along its length, a motor mounting base slidably connected to the second slide rail, a motor fixedly mounted on the motor mounting base, and a gear fixedly mounted on the free end of the motor output shaft; a rack fixedly mounted on the beam of the crossbeam, the gear meshing with the rack, and a connecting rod fixedly connected to the motor mounting base.

[0010] Furthermore, the motor mounting base is a U-shaped structure made of steel plate, and a slider is fixed to the lower end face of the motor mounting base. The second slide rail is embedded in the slider, the motor is fixed to the horizontal plate of the motor mounting base, and the connecting rod is connected to the vertical plate of the motor mounting base.

[0011] Furthermore, to expand the applicability of this device and make it applicable to the welding of channel steel of various widths, the tracking welding device also includes a slide table. The fixed part of the slide table is fixedly installed on the side of the rack and pinion traveling mechanism. The connecting rod is fixedly connected to the moving part of the slide table. The moving part of the slide table can drag the tracking welding device to move perpendicular to the crossbeam through the connecting rod.

[0012] Furthermore, the outer circumference of the guide wheel is provided with a V-shaped annular groove. Under the action of the first cylinder and the elastic element, the guide wheel can be pressed and locked onto the top corner of the channel steel of the rear corner post to be welded through the annular groove.

[0013] Furthermore, the elastic element is a compression spring, and a connecting block is fixedly mounted on the mounting plate. One end of the compression spring is fixedly connected to the piston rod of the first cylinder, and the other end is fixedly connected to the connecting block through a connecting shaft.

[0014] Furthermore, to improve work efficiency and enable simultaneous welding of the two fillet welds of the channel steel and the bent part, there are two tracking welding devices, which are symmetrically arranged on both sides of the crossbeam.

[0015] Furthermore, to ensure the channel steel is more stably fixed during welding, several second cylinders are mounted on the lower end face of the crossbeam. A pressure rod is fixedly mounted on the free end of the piston rod of each second cylinder, with the free end of the pressure rod pointing towards the worktable. When the piston rod of the second cylinder extends, the pressure rod can press the channel steel to be welded onto the bent part.

[0016] The beneficial effects of this invention are as follows: This invention employs mechanical contouring, utilizing a rack and pinion mechanism and a dual mechanical contouring mechanism consisting of a guide wheel with a V-groove and a compression spring during welding. The guide wheel travels along the contour of the rear corner column channel steel, thereby achieving synchronous adjustment between the welding torch position and the guide wheel's trajectory, ultimately realizing contouring welding. Compared with laser-tracking automatic welding machines, this device has lower requirements for the working environment; compared with manual welding, it greatly improves efficiency, provides more stable welding quality, and offers better consistency. Compared with similar mechanical tracking welding devices currently available, it has a simpler structure, lower cost, and higher reliability. Attached Figure Description

[0017] 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a perspective view of the present invention.

[0019] Figure 2 This is the front view of the present invention.

[0020] Figure 3 yes Figure 2 Side view.

[0021] Figure 4 This is a schematic diagram showing the position of the welding machine frame in this invention.

[0022] Figure 5 This is a schematic diagram of the usage state of the present invention.

[0023] Figure 6 This is a 3D diagram of the rear corner pillar.

[0024] In the diagram: 1. Guide wheel; 2. Guide wheel bracket; 3. Mounting plate; 4. Connecting shaft; 5. First slide rail; 6. First bending plate; 7. Slide table; 7.1. Set screw; 7.2. Knob; 8. Second bending plate; 9. Connecting rod; 10. First cylinder; 11. Compression spring; 12. Connecting block; 13. Welding torch bracket; 14. Welding torch; 1-14. Tracking welding device; 15. Workpiece limiting mechanism; 16. Motor; 17. Motor mounting base; 18. Second slide rail; 19. Rack; 20. Second cylinder; 21. Pressure rod; 22. Gantry frame; 22-1. Column; 22-2. Worktable; 22-3. Crossbeam; 23. Channel steel; 24. Bending part. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. 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.

[0027] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] This invention discloses a tracking welding device for the rear corner posts of a container, wherein the tracking welding devices 1-14 are mounted on the welding frame, as shown below. Figure 4 , 5As shown, the welding machine body includes: a rectangular frame structure gantry 22, supported by four columns 22-1, with a worktable 22-2 fixedly connected to the lower part of the four columns; a workpiece limiting mechanism 15, composed of plate and block-like structures, is fixed on the worktable surface. During welding, the bent part 23 in the rear corner column is placed within the limiting mechanism, and the bent part is restricted by the limiting mechanism to prevent it from moving horizontally on the worktable due to external force. A crossbeam 22-3 is fixedly connected to the upper end of the four columns, and two second slide rails 18 are provided along the length of the crossbeam. An inverted U-shaped motor mounting base 17, made of bent steel plate, is slidably connected to the two second slide rails. Specifically, a slider is fixed to the lower end face of the motor mounting base (see...). Figure 5 The second slide is embedded in the slider. A motor 16 is fixedly mounted on the top of the horizontal plate of the motor mounting base. The output shaft of the motor passes through the horizontal plate, and a gear is fixedly mounted on the free end of the output shaft. A rack 19 is fixedly mounted on the beam between the two second slides. The gear meshes with the rack. When the motor rotates clockwise or counterclockwise, the gear meshing with the rack moves left and right along the rack while rotating, thereby driving the motor mounting base to move synchronously. The two vertical plates of the motor mounting base are placed on the outer sides of the two sides of the horizontal beam.

[0029] like Figure 5 As shown, two tracking welding devices are installed on the welding machine frame. The two tracking welding devices are fixedly connected to the outside of the vertical plate of the motor mounting base and are symmetrically arranged on the left and right sides of the crossbeam.

[0030] like Figure 1 , 2 As shown in Figure 3, the tracking welding device includes: a connecting rod 9, a slide 7 fixedly connected to one side of the upper part of the connecting rod, the slide including a fixed part and a moving part, a knob 7.2 rotatably connected to the fixed part, the knob being connected to the moving part through a screw and a nut, rotating the knob can cause the moving part and the fixed part to move relative to each other; a set screw 7.1 is threadedly connected to the moving part, tightening the set screw can lock the moving part and the fixed part in a locked state.

[0031] The slide table is fixedly mounted with a second curved plate 8. The slide table is fixedly connected to the vertical plate of the motor mounting base via the second curved plate. The connecting rod is fixedly connected to the moving part of the slide table. An L-shaped first curved plate 6 is rotatably connected to the lower part of the connecting rod on the opposite side of the slide table. The first curved plate includes a horizontal plate and a vertical plate. The first curved plate is rotatably connected to the connecting rod via the vertical plate. A first cylinder 10 is fixedly mounted on the horizontal plate. The piston rod of the first cylinder passes through a round hole provided on the horizontal plate and is placed inside the vertical plate. A first slide rail 5 is fixed on the vertical plate and is parallel to the piston rod. A mounting plate 3 is slidably connected to the first slide rail. A guide wheel bracket 2 is fixed on the lower part of the mounting plate. A guide wheel 1 is rotatably connected to the bottom of the guide wheel bracket. Figure 1 , 4As shown, a welding torch holder 13 is also mounted on the mounting plate, and the welding torch is held in the welding torch holder. Figure 2 , 4 As shown, the welding torch and guide wheels are arranged side by side on the mounting plate, with the crossbeam on the gantry as a reference, where the guide wheel frame is on the inside and the welding torch is on the outside.

[0032] like Figure 5 As shown, the moving direction of the sliding table is perpendicular to the crossbeam. When the moving parts of the two sliding tables move towards the crossbeam, the distance between the two tracking welding devices decreases, and correspondingly, the distance between the two welding torches decreases. Conversely, the distance between the two welding torches increases.

[0033] Five second cylinders 20 are fixed in the middle of the lower end face of the crossbeam. The free end of the piston rod of the second cylinder is fixed with a pressure rod 21, and the free end of the pressure rod points towards the worktable.

[0034] A connecting block 12 is fixed on the upper part of the mounting plate, and the connecting block has a through hole in the middle. A compression spring 11 is fixed to the free end of the piston rod, and a connecting shaft 4 is fixedly connected to the other end of the compression spring. The other end of the connecting shaft passes through the through hole on the connecting block and is fixedly connected to the connecting block with a nut. When the piston rod of the first cylinder extends, the extended piston rod pushes the compression spring, the compression spring pushes the connecting shaft, the connecting shaft pushes the connecting block, and the connecting block drives the mounting plate to move away from the first cylinder along the first slide, thereby moving the guide wheel away from the first cylinder; conversely, the guide wheel moves towards the first cylinder.

[0035] In use, place the bent part in the limiting mechanism, then place the channel steel 22 with its opening facing down on the bent part. Activate the second cylinder, and the pressure rod moves downward to press the channel steel onto the bent part. Grasp and rotate the tracking welding device by hand, so that the V-groove of its guide wheel faces the apex of the channel steel. Activate the first cylinder; as the piston rod of the first cylinder extends outward, the V-groove of the guide wheel engages with the apex of the channel steel. Rotate the tracking welding device so that the two sides of the V-groove of the guide wheel adhere to the top and sides of the channel steel. At this time, the welding torch tip is aligned with the weld seam between the channel steel and the bent part. After the compression spring undergoes a certain deformation, the clamping force of the compression spring is sufficient to press the V-groove of the guide wheel onto the apex of the channel steel. Then, activate the pressure holding state of the first cylinder. Activate the welding torch, and simultaneously start the motor. The tracking welding device moves under the action of the motor, driving the welding head to move along the weld seam, thereby welding the channel steel and the bent part together.

[0036] Since both the guide wheel and the welding head are fixed to the mounting plate, their relative positions will not change due to the movement of the tracking welding device. The guide wheel is tightly pressed against the apex of the channel steel by the force of the compression spring, and its two sides are closely attached to the top and sides of the channel steel. Therefore, when the angle of the channel steel changes or there is slight lateral deformation, the trajectory of the guide wheel will change accordingly. Because the weld trajectory between the channel steel and the bent part is consistent with the lateral or angular deformation of the channel steel, the distance and angle of the welding head from the weld, which is synchronized with the guide wheel, will not change due to the lateral or angular deformation of the channel steel. The welding head will move synchronously and in the same direction as the guide wheel, thus achieving mechanical tracking welding.

[0037] When the dimensions of the channel steel change, for example, if the width of the channel steel increases, the set screw on the slide can be loosened first, and the moving part of the slide can be moved outward by turning the knob to increase the horizontal distance between the two welding heads. After moving to the appropriate distance, the set screw can be tightened.

[0038] After welding is completed, the first cylinder is activated. The piston rod of the first cylinder retracts, and the elastic force of the compression spring is fully released. The guide wheel disengages from the channel steel. Then, the tracking welding device is rotated outward by hand to further move the guide wheel away from the channel steel. The second cylinder is then activated. The piston rod of the second cylinder retracts, and the pressure rod moves upward to release the pressure on the channel steel. The welded rear corner post of the container is then removed from the worktable by hand.

[0039] In summary: When the motor starts, the motor mounting plate drives the tracking welding device to move linearly along the crossbeam; when the moving part of the sliding table is moved, the distance between the two welding torch heads can be increased or decreased; when the tracking welding device is rotated, the angle between the guide wheel and the welding head relative to the channel steel can be adjusted; when the first cylinder works, the guide wheel can move closer to or further away from the channel steel; the compression spring ensures that the guide wheel is always in close contact with the apex angle of the channel steel, and even if the angle of the channel steel changes, the guide wheel and the welding torch can synchronously change their movement trajectory under the action of the compression spring, following the deformation of the channel steel. Therefore, in this device, the welding head of the welding torch will not change the angle and distance between itself and the weld due to changes in the angle of the channel steel, and it can also be applied to welding channel steels of different specifications and widths.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A container rear corner post tracking welding device, comprising a welding frame body, the welding frame body being composed of multiple supporting columns and crossbeams fixedly connected to the upper ends of the columns, a worktable for placing the rear corner posts to be welded being fixedly connected between the columns, and a rack and pinion traveling mechanism being mounted on the crossbeams, characterized in that: A connecting rod is fixedly connected to the rack and pinion traveling mechanism. The connecting rod can reciprocate linearly along the direction of the crossbeam under the drive of the rack and pinion traveling mechanism. A first curved plate is rotatably connected to the lower part of the connecting rod. A first cylinder is fixedly mounted on the horizontal plate of the first curved plate. A first slide rail is fixedly mounted on the vertical plate of the first curved plate. A mounting plate is slidably connected to the first slide rail. The mounting plate is connected to the piston rod of the first cylinder through an elastic element. A welding torch and a guide wheel are fixedly connected to the mounting plate. The welding torch is positioned on the outside of the guide wheel relative to the crossbeam. The rack and pinion traveling mechanism includes: a second slide rail fixed on the crossbeam and arranged along the length direction, a motor mounting base slidably connected to the second slide rail, a motor fixedly mounted on the motor mounting base, and a gear fixedly mounted on the free end of the motor output shaft; a rack fixedly mounted on the beam of the crossbeam, the gear meshing with the rack, and a connecting rod fixedly connected to the motor mounting base; The outer circumference of the guide wheel is provided with a V-shaped annular groove. Under the action of the first cylinder and the elastic element, the guide wheel can be pressed and locked onto the top corner of the channel steel of the rear corner post to be welded through the annular groove. The elastic element is a compression spring, and a connecting block is fixedly mounted on the mounting plate. One end of the compression spring is fixedly connected to the piston rod of the first cylinder, and the other end is fixedly connected to the connecting block through a connecting shaft. Several second cylinders are mounted on the lower end face of the crossbeam. A pressure rod is fixedly mounted on the free end of the piston rod of the second cylinder. The free end of the pressure rod points towards the worktable. When the piston rod of the second cylinder extends, the pressure rod can press the channel steel to be welded onto the bent part.

2. The container rear corner post tracking welding device according to claim 1, characterized in that: The motor mounting base is a U-shaped structure made of steel plate. A slider is fixed to the lower end face of the motor mounting base. The second slide rail is embedded in the slider. The motor is fixed to the horizontal plate of the motor mounting base. The connecting rod is connected to the vertical plate of the motor mounting base.

3. The container rear corner post tracking welding device according to claim 1, characterized in that: The tracking welding device also includes a slide table. The fixed part of the slide table is fixedly installed on the side of the rack and pinion traveling mechanism. The connecting rod is fixedly connected to the moving part of the slide table. The moving part of the slide table can drag the tracking welding device to move perpendicular to the crossbeam through the connecting rod.

4. The container rear corner post tracking welding device according to claim 1, characterized in that: There are two tracking welding devices, which are symmetrically arranged on both sides of the crossbeam.

Images