Container rear corner post tracking welding device

Abstract

The invention provides a container rear corner post tracking welding device which comprises a welding machine frame body, the welding machine frame body is composed of a plurality of stand columns playing a supporting role and a cross beam fixedly connected to the upper ends of the stand columns, a rack walking mechanism is installed on the cross beam, and a connecting rod is fixedly connected to the rack walking mechanism; a first bent plate is rotatably connected to the lower portion of the connecting rod, a first air cylinder is fixedly installed on a transverse plate of the first bent plate, a first sliding way is fixedly installed on a vertical plate of the first bent plate, a mounting plate is slidably connected to the first sliding way, and a welding gun and a guide wheel are fixedly connected to the mounting plate. Mechanical profiling is adopted, during welding, a rack walking mechanism is fused with a double-mechanical profiling mechanism composed of a guide wheel with a V-shaped groove, a compression spring and the like, the guide wheel walks along the rear corner column channel steel in a profiling mode, therefore, synchronous adjustment of the position of a welding gun and the walking track of the guide wheel is achieved, and finally tracking profiling welding is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of welding devices, and in particular to a tracking welding device for a rear corner column of a container. Background Art

[0002] The existing container rear corner column is welded by a bent part and a channel steel standing on the bent part (see Figure 6 ), two symmetrical fillet welds are formed between the channel steel and the bent parts. At present, the industry mostly uses laser tracking automatic welding and manual welding to weld the channel steel and the bent parts together.

[0003] The laser tracking automatic welding machine adopts a combination of a walking structure and a laser tracking system. The laser tracking can automatically track the trajectory of the weld, and the processor processes the signal to adjust the position of the welding gun. However, the laser tracking automatic welding equipment has high requirements on the skills of maintenance workers; the manufacturing cost is high, the investment recovery period is long; the working environment requirements are high, and the environment must be free of smoke and dust pollution; therefore, it is not suitable for use under the working conditions of sheet metal production and processing such as containers.

[0004] Manual welding requires a high level of skill from the workers. Due to the differences in workers' skill levels, the welding quality is unstable. It is impossible to operate 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 compacted, and a special process must be arranged for correction after manual welding.

[0005] The Chinese invention patent "Automatic Tracking Auxiliary Welding Device for Fillet Welds" with the authorization announcement number CN105921856B provides a welding device with a lower cost than the laser tracking automatic welding machine. Its specific structure is: "It includes a main guide beam, a mounting plate frame is provided on the main guide beam, longitudinal guide rails are symmetrically provided at the lower part of the mounting plate frame, and longitudinal slides are symmetrically installed through the longitudinal guide rails, and a lifting first cylinder is symmetrically installed on the mounting plate frame, and the lower end of the cylinder rod of the lifting first cylinder is elastically connected to the corresponding longitudinal slide; a horizontal first cylinder and a horizontal slide are respectively provided on the longitudinal slide, and a transverse slide is installed through the horizontal slide, and one end of the cylinder rod of the horizontal first cylinder is elastically connected to the transverse slide on the same side, and a welding gun mounting sleeve is respectively provided in front of the transverse slide."

[0006] However, the device has two first cylinders. When in use, the welding gun adjusts its vertical and longitudinal positions according to the changes in the weld position by controlling the two first cylinders. Channel steel is produced by hot rolling or cold bending, and its straightness and flatness tolerances are much greater than those of machined parts. The patent document does not describe how to control the actions of the two first cylinders according to the changes in the shape and size of the channel steel, but it is conceivable that the device cannot achieve this, that is, the device cannot achieve automatic tracking. Summary of the invention

[0007] In view of this, the present invention provides a container rear corner column tracking welding device which integrates a rack walking mechanism and a double mechanical profiling mechanism, utilizes guide wheels to walk along the rear corner column channel steel profiling, and adjusts the position of the welding gun according to the linear change trajectory of the channel steel top angle, thereby realizing tracking profiling welding.

[0008] To this end, the present application provides the following technical solutions: a container rear corner column tracking welding device, comprising a welding frame, the welding frame is composed of a plurality of supporting columns and a crossbeam fixedly connected to the upper ends of the columns, a workbench for placing the rear corner columns to be welded is fixedly connected between the columns, a rack walking mechanism is installed on the crossbeam, a connecting rod is fixedly connected to the rack walking mechanism, and the connecting rod can perform reciprocating linear motion along the direction of the crossbeam under the drive of the rack walking mechanism; a first bent plate is rotatably connected to the lower part of the connecting rod, a first cylinder is fixedly installed on the horizontal plate of the first bent plate, a first slide is fixedly installed on the vertical plate of the first bent plate, a mounting plate is slidably connected to the first slide, and the mounting plate is connected to the piston rod of the first cylinder through an elastic member; a welding gun and a guide wheel are fixedly connected to the mounting plate, and the welding gun is arranged on the outside of the guide wheel relative to the crossbeam.

[0009] Furthermore, the rack walking mechanism includes: a second slide fixed on the cross beam and arranged along the length direction, the second slide is slidably connected with a motor mounting seat, the motor is fixedly mounted on the motor mounting seat, and the free end of the motor output shaft is fixedly mounted with a gear; a rack is fixedly mounted on the beam body, the gear is meshed with the rack, and the connecting rod is fixedly connected to the motor mounting seat.

[0010] Furthermore, the motor mounting seat is a U-shaped structure formed by bending a steel plate, a slider is fixed to the lower end surface of the motor mounting seat, the second slide is embedded in the slider, the motor is fixed to the horizontal plate of the motor mounting seat, and the connecting rod is connected to the vertical plate of the motor mounting seat.

[0011] Furthermore, in order to expand the scope of application of this device so that it can be applied to the welding of channel steels of various widths, the tracking welding device also includes a slide, the fixed part of the slide is fixedly installed on the side of the rack walking mechanism, and the connecting rod is fixedly connected to the moving part of the slide. The moving part of the slide can drag the tracking welding device through the connecting rod to move vertically to the crossbeam.

[0012] Furthermore, a V-shaped annular groove is provided on the outer circumferential surface of the guide wheel, and the guide wheel can be pressed and clamped on the top angle of the channel steel of the rear corner column to be welded through the annular groove under the action of the first cylinder and the elastic member.

[0013] Furthermore, the elastic member is a compression spring, 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 via a connecting shaft.

[0014] Furthermore, in order to improve work efficiency and realize simultaneous welding of 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 beam.

[0015] Furthermore, in order to ensure that the channel steel can be fixed more stably during welding, a plurality of second cylinders are installed on the lower end surface of the crossbeam, and a pressure rod is fixedly installed at the free end of the piston rod of the second cylinder, and the free end of the pressure rod points to the workbench. When the piston rod of the second cylinder is extended, the pressure rod can press the channel steel to be welded on the bending part.

[0016] The beneficial effects of the present invention are as follows: the present invention adopts mechanical profiling, and during welding, a rack walking mechanism and a dual mechanical profiling mechanism composed of a guide wheel with a V-groove, a compression spring, etc. are integrated, and the guide wheel is used to walk along the rear corner column channel steel to follow the contour, thereby realizing the synchronous adjustment of the welding gun position and the guide wheel walking trajectory, and finally realizing tracking profiling welding. Compared with the laser tracking automatic welding machine, this device has low requirements on the working environment; compared with manual welding, the efficiency is greatly improved, the welding quality is more stable, and the consistency is better. Compared with the current similar mechanical tracking welding devices, the structure is simpler, the cost is lower, and the reliability is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

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

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

[0020] Figure 3 yes Figure 2 Side view of.

[0021] Figure 4 It is a schematic diagram of the position of the welding frame body installed in the present invention.

[0022] Figure 5 It is a schematic diagram of the use state of the present invention.

[0023] Figure 6 It is a three-dimensional diagram of the rear corner column.

[0024] In the figure: 1. guide wheel; 2. guide wheel bracket; 3. mounting plate; 4. connecting shaft; 5. first slide; 6. first bent plate; 7. slide; 7.1. set screw; 7.2. knob; 8. second bent plate; 9. connecting rod; 10. first cylinder; 11. compression spring; 12. connecting block; 13. welding gun bracket; 14. welding gun; 1-14. tracking welding device; 15. workpiece limiting mechanism; 16. motor; 17. motor mounting seat; 18. second slide; 19. rack; 20. second cylinder; 21. pressure rod; 22. gantry; 22-1. column; 22-2. workbench; 22-3; beam; 23. channel steel; 24. bending part. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

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

[0028] The present invention discloses a tracking welding device for a rear corner column of a container. The tracking welding device 1-14 is installed on a welding frame. Figure 4 , 5As shown, the welding machine body includes: a gantry 22 of a rectangular frame structure, the gantry is supported by four columns 22-1, and a workbench 22-2 is fixedly connected to the lower part of the four columns; a workpiece limiting mechanism 15 surrounded by a plate and block-like structure is fixed on the workbench surface, and the bending part 23 in the rear corner column is placed in the limiting mechanism during welding. The bending part is restricted by the limiting mechanism on all sides and will not move in the horizontal direction on the workbench due to external forces. A crossbeam 22-3 is fixedly connected to the upper ends of the four columns, and two second slideways 18 are arranged on the crossbeam along the length direction. An inverted U-shaped motor mounting seat 17 made of bent steel plate is slidably connected to the two second slideways. Specifically: a slider is fixed to the lower end face of the motor mounting seat (see Figure 5 ), the second slideway is embedded in the slider. A motor 16 is fixedly mounted on the horizontal plate of the motor mounting seat, the output shaft of the motor passes through the horizontal plate, a gear is fixedly mounted on the free end of the output shaft, a rack 19 is fixedly mounted on the beam body between the two second slideways, the gear meshes with the rack, when the motor rotates clockwise or counterclockwise, the gear meshed with the rack moves left and right along the rack while rotating, thereby driving the motor mounting seat to move synchronously; the two vertical plates of the motor mounting seat are placed on the outside of the two side surfaces of the horizontal beam.

[0029] like Figure 5 As shown, two tracking welding devices are installed on the welding frame, and the two tracking welding devices are respectively fixedly connected to the outer sides of the vertical plate of the motor mounting seat and 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 is fixedly connected to one side of the upper part of the connecting rod, the slide includes a fixed part and a movable part, the fixed part is rotatably connected to a knob 7.2, the knob is connected to the movable part through a screw and a nut, and rotating the knob can make the movable part and the fixed part produce relative movement; a locking screw 7.1 is threadedly connected to the movable part, and tightening the locking screw can put the movable part and the fixed part in a locked state.

[0031] The fixed part of the slide is fixedly provided with a second bent plate 8, and the slide is fixedly connected to the vertical plate of the motor mounting seat through the second bent plate, and the connecting rod is fixedly connected to the movable part of the slide. The lower part of the connecting rod on the opposite side of the slide is rotatably connected with an L-shaped first bent plate 6, and the first bent plate includes a transverse plate and a vertical plate, and the first bent plate is rotatably connected to the connecting rod through the vertical plate; a first cylinder 10 is fixedly provided on the transverse plate, and the piston rod of the first cylinder passes through the circular hole provided on the transverse plate and is placed on the inner side of the vertical plate. A first slideway 5 arranged parallel to the piston rod is fixed on the vertical plate, and a mounting plate 3 is slidably connected to the first slideway. A guide wheel bracket 2 is fixed to the plate body at the lower part of the mounting plate, and a guide wheel 1 is rotatably connected to the bottom of the guide wheel bracket, such as Figure 1 , 4As shown, a welding gun bracket 13 is also mounted on the mounting plate, and a welding gun is clamped in the welding gun bracket. Figure 2 , 4 As shown, the welding gun and the guide wheel are arranged side by side on the plate surface of the mounting plate, with the crossbeam on the gantry as a reference, wherein the guide wheel is on the inner side and the welding gun is on the outer side.

[0032] like Figure 5 As shown, the moving direction of the sliding table moving part is perpendicular to the cross beam. When the moving parts of the two sliding tables move toward the direction of the cross beam, the distance between the two tracking welding devices becomes smaller, and accordingly, the distance between the two welding guns becomes smaller. Otherwise, the distance between the two welding guns increases.

[0033] Five second cylinders 20 are fixed in the middle of the lower end surface of the cross beam. A pressure rod 21 is fixed at the free end of the piston rod of the second cylinder, and the free end of the pressure rod points to the workbench.

[0034] A connecting block 12 is fixed on the plate body at the upper part of the mounting plate, and a through hole is provided in the middle of the connecting block. A compression spring 11 is fixed on the free end of the piston rod, and the other end of the compression spring is fixedly connected to a connecting shaft 4. The other end of the connecting shaft passes through the through hole on the connecting block and is fixedly connected to the connecting shaft and 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 along the first slideway away from the first cylinder, thereby moving the guide wheel away from the first cylinder; conversely, the guide wheel moves toward the first cylinder side.

[0035] When in use, the bending part is placed in the limiting mechanism, and then the opening of the channel steel 22 is placed on the bending part with the opening facing downward, and the second cylinder is started, and the pressure rod moves downward to press the channel steel on the bending part. The tracking welding device is grasped and rotated by hand so that the V-shaped groove of the guide wheel faces the top corner of the channel steel; the first cylinder is started, and the piston rod of the first cylinder is extended outward so that the V-shaped groove of the guide wheel is stuck on the top corner of the channel steel, and the tracking welding device is rotated so that the two side surfaces of the V-shaped groove of the guide wheel are attached to the top surface and side surface of the channel steel, and the welding head of the welding gun is aligned with the weld between the channel steel and the bending part; after the compression spring is deformed to a certain extent, the compression force of the compression spring is sufficient to press the V-shaped groove of the guide wheel on the top corner of the channel steel; then the pressure holding state of the first cylinder is started. Start the welding gun, and start the motor at the same time when starting the welding gun; the tracking welding device moves under the action of the motor and drives the welding head to move along the weld, thereby welding the channel steel and the bending part together.

[0036] Since the guide wheel and the welding head are both fixed on the mounting plate, their relative positions will not change due to the movement of the tracking welding device; the guide wheel is tightly clamped at the top corner of the channel steel under the action of the compression spring force, and the two side surfaces of the guide wheel are tightly attached to the top and side surfaces of the channel steel; therefore, when the angle of the channel steel changes and there is a slight lateral deformation, the running track of the guide wheel will change with the deformation of the channel steel. Since the track of the weld between the channel steel and the bent part is consistent with the lateral deformation or angular deformation of the channel steel, the distance and angle of the welding head synchronized with the guide wheel from the weld will not change due to the lateral deformation or angular deformation of the channel steel, and the welding head will move synchronously and in the same direction with the guide wheel, thereby realizing mechanical tracking welding.

[0037] When the size of the channel steel changes, for example, the width of the channel steel increases, you can first loosen the set screws on the slide, move the moving part of the slide outward by turning the knob, thereby increasing the horizontal spacing between the two welding heads, and then tighten the set screws after moving to the appropriate distance.

[0038] After welding is completed, start the first cylinder, the piston rod of the first cylinder retracts, and after the elastic force of the compression spring is completely released, the guide wheel is out of contact with the channel steel, and then the tracking welding device is rotated outward by hand to make the guide wheel further away from the channel steel. Then start the second cylinder, the piston rod of the second cylinder retracts, and the pressure on the channel steel is released after the pressure rod moves upward, and the welded container rear corner column is taken out from the workbench by hand.

[0039] In summary: when the motor is started, the motor mounting plate can drive the tracking welding device to make a linear motion along the crossbeam; when the moving part of the slide is moved, the distance between the two welding gun welding heads can be increased or decreased; when the tracking welding device is rotated, the angle of the guide wheel and the welding head relative to the channel steel can be adjusted; when the first cylinder is working, the guide wheel can move closer to or away from the channel steel; the compression spring can ensure that the guide wheel is in close contact with the top angle of the channel steel at all times, and even if the angle of the channel steel changes, the guide wheel and the welding gun can also change their movement trajectory synchronously with the deformation of the channel steel under the action of the compression spring. Therefore, the welding head of the welding gun in this device will not change the angle and distance between it and the weld due to the change in the angle of the channel steel, and it can also be applied to the welding of 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned 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 column tracking welding device, comprising a welding frame, the welding frame is composed of a plurality of supporting columns and beams fixedly connected to the upper ends of the columns, a workbench for placing the rear corner columns to be welded is fixedly connected between the columns, and a rack walking mechanism is installed on the beam, characterized in that: A connecting rod is fixedly connected to the rack walking mechanism, and the connecting rod can make reciprocating linear motion along the direction of the crossbeam driven by the rack walking mechanism; the lower part of the connecting rod is rotatably connected to a first bent plate, a first cylinder is fixedly mounted on the transverse plate of the first bent plate, a first slide is fixedly mounted on the vertical plate of the first bent plate, a mounting plate is slidably connected to the first slide, and the mounting plate is connected to the piston rod of the first cylinder through an elastic member; a welding gun and a guide wheel are fixedly connected to the mounting plate, and the welding gun is arranged on the outside of the guide wheel relative to the crossbeam.

2. According to claim 1, a container rear corner column tracking welding device is characterized in that: The rack walking mechanism includes: a second slideway fixed on the crossbeam and arranged along the length direction, a motor mounting seat being slidably connected to the second slideway, a motor being fixedly mounted on the motor mounting seat, and a gear being fixedly mounted on the free end of the motor output shaft; a rack being fixedly mounted on the beam body, the gear being meshed with the rack, and the connecting rod being fixedly connected to the motor mounting seat.

3. According to claim 2, a container rear corner column tracking welding device is characterized in that: The motor mounting seat is a U-shaped structure formed by bending a steel plate, a slider is fixed to the lower end surface of the motor mounting seat, the second slideway is embedded in the slider, the motor is fixed to the horizontal plate of the motor mounting seat, and the connecting rod is connected to the vertical plate of the motor mounting seat.

4. According to claim 1, a container rear corner column tracking welding device is characterized in that: The tracking welding device also includes a slide, the fixed part of the slide is fixedly installed on the side of the rack walking mechanism, the connecting rod is fixedly connected to the moving part of the slide, and the moving part of the slide can drag the tracking welding device through the connecting rod to move vertically to the crossbeam.

5. According to claim 1, a container rear corner column tracking welding device is characterized in that: A V-shaped annular groove is provided on the outer circumferential surface of the guide wheel. Under the action of the first cylinder and the elastic member, the guide wheel can be pressed and clamped on the top angle of the channel steel of the rear corner column to be welded through the annular groove.

6. According to claim 1, a container rear corner column tracking welding device is characterized in that: The elastic member is a compression spring, 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 via a connecting shaft.

7. According to claim 1, a container rear corner column tracking welding device is characterized in that: There are two tracking welding devices, and the two tracking welding devices are symmetrically arranged on both sides of the crossbeam.

8. According to claim 1, a container rear corner column tracking welding device is characterized in that: A plurality of second cylinders are mounted on the lower end surface of the crossbeam, and 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 to the workbench, and the pressure rod can press the channel steel to be welded onto the bending part when the piston rod of the second cylinder is extended.

Images