A pneumatic clamping automatic welding equipment for trapezoidal guardrail

Abstract

This patent discloses a pneumatic clamping automatic welding device for trapezoidal guardrails. This device consists of a base, a clamping mechanism, an action mechanism and an electronic control system. The base consists of eight legs, a platform and two beams. The clamping mechanism consists of two height adjustment modules, two spacing adjustment mechanisms and a cylinder group. The height adjustment mechanism is guided by a dovetail groove, and the height is adjusted by a height adjustment handwheel installed at the bottom; the spacing adjustment mechanism is an adjustable equidistant separation device composed of multiple pull-gate plates; the cylinder group is composed of a cylinder and a cylinder bracket; the action mechanism is composed of an electric slide and two manual slides. The electronic control system can control the different motion trajectories of the electric slide, the extension and retraction of the cylinder, and the start and stop operations according to the input signal. The beneficial effects of this patent are: reducing the number of special processing personnel, improving production efficiency, reducing processing costs, and improving welding quality.

Description

Technical Field

[0001] This patent relates to the field of guardrail welding, and specifically to a method for clamping and automatically welding a trapezoidal guardrail or other guardrails containing a trapezoidal structure with adjustable spacing. Background Art

[0002] As China's urbanization process has accelerated significantly, more and more people have flocked to large and medium-sized cities, bringing about huge housing demand. Trapezoidal guardrails are an indispensable product in housing and there is a large demand for them every year.

[0003] The use background of this patent is dedicated to the mass production of engineering trapezoidal guardrails. The existing trapezoidal guardrails are welded manually. During welding, due to the different lengths, heights and pipe sizes of the trapezoidal guardrails, only a temporary fixture can be made for each guardrail of different models, which wastes time and cannot guarantee the accuracy of each fixture, reducing the quality of the product. This patent solves this problem well through an adjustable fixture, which can accurately clamp and position the guardrails of changed models in a short time. At the same time, ordinary fixtures cannot tighten the pipes during welding, so gaps will appear on both sides that are not welded, and it is necessary to fill the putty in the later stage, adding a process of filling the putty. This patent solves this problem well by tightening with five cylinders. Finally, the automated welding method is more stable than manual welding, and the weld is smaller, which can reduce the workload of the later grinding process. The automatic guardrail welding machines of other patents are not specifically designed for the welding of trapezoidal guardrails, and have the disadvantages of large floor space and high price.

[0004] At the same time, the working mode of two welding guns walking horizontally is adopted. By manually adjusting the position of the welding guns horizontally, the trapezoidal guardrail can be welded in the simplest way of movement. Practice has proved that the welding speed of the automatic welding machine of this patent for the trapezoidal guardrail is greatly improved compared with the ordinary manual welding speed. At the same time, the automatic welding machine designed by this patent is easy to operate, and ordinary workers can operate it, reducing the number of special processing personnel. Summary of the invention

[0005] In order to improve production efficiency, processing quality and reduce labor costs, and solve the problem of difficult clamping of guardrails of different models, a pneumatic clamping automatic welding equipment for trapezoidal guardrails was invented.

[0006] The technical solution adopted by this patent to solve its technical problems is: a pneumatic clamping automatic welding equipment for trapezoidal guardrails. This equipment consists of a base, a clamping mechanism, an action mechanism and an electronic control system. The base consists of eight legs, a platform and two beams; the platform is used to support the fixed clamping mechanism, and the two beams are used to support the fixed action mechanism and the carbon dioxide shielded gas welding machine wire walking machine respectively. The clamping mechanism consists of two height adjustment modules, two spacing adjustment modules and a cylinder group. The main problem is that when the model of the trapezoidal guardrail is changed, the hand wheel of the slide of the moving mechanism is adjusted to adapt to the change of the height of the trapezoidal guardrail, the spacing between the vertical pipes is adjusted by adjusting the spacing adjustment mechanism, and then the height adjustment mechanism is adjusted to adapt to the height difference between the surface pipe and the vertical pipe. By changing the parameters on the display screen of the electronic control system, it can adapt to different models of trapezoidal guardrails.

[0007] Preferably, the position of the height adjustment mechanism does not change during use. It is composed of a flat plate for placing the face tube, two dovetail groove guides fixed on the base, and two height adjustment handwheels with screws installed at the bottom. The height difference between the face tube and the vertical tube is manually adjusted by turning the two height adjustment handwheels, ensuring the accurate shape of the trapezoidal guardrail after clamping. The height adjustment plate of the cylinder group height adjustment mechanism is connected to the cylinder group, and can adjust the position according to the height of the trapezoidal guardrail. It is guided by four dovetail grooves to limit the height adjustment plate to move only up and down. Two height adjustment handwheels with screws are installed at the bottom. The height difference between the face tube and the vertical tube is manually adjusted by turning the height adjustment handwheel, ensuring the accurate shape of the trapezoidal guardrail after clamping.

[0008] Preferably, the fixed spacing adjustment mechanism is composed of a double-hole pull-gate piece, a three-hole pull-gate piece, two kinds of long and short pins, and an arrangement and assembly. A support plate is arranged below it, and the support plate of the fixed spacing adjustment mechanism is fixed on the base. One end of the pull gate is fixed to the support plate by welding, and the other end is locked by installing a spacing adjustment locking block on the pin. The bolts on the spacing adjustment locking block pass through the bottom plate of the straight-through mechanism. After adjusting the distance, tighten the bolts to fix the pull gate in a specific position. The bolt adjustment position is determined according to the total clearance length of the guardrail, and the length of each spacing is automatically generated by arranging and assembling the pull gate pieces. A tube is placed at each long pin, and the distance between the two tubes is the standard distance. There is a plate on the side of the spacing adjustment mechanism to support the vertical pipe. If the height of the support plate remains unchanged, the height of the vertical pipe remains unchanged. The height difference between the vertical pipe and the surface pipe is changed by adjusting the height of the height adjustment mechanism. The basic structure of the mobile spacing adjustment mechanism is the same as that of the fixed spacing adjustment mechanism, but the installation method is different. The mobile spacing adjustment mechanism is installed on the linear guide rail, which can adjust the spacing adjustment mechanism to a suitable position according to the height of the ladder guardrail, and fix the position of the spacing adjustment mechanism through the locking mechanism of the slider. The difference between this equipment and similar equipment is that it can quickly adjust the distance between vertical pipes.

[0009] Preferably, the cylinder group is composed of five thin cylinders mounted on a cylinder bracket and arranged at equal distances. The cylinder group and the rear cylinder group height adjustment mechanism are mounted on a linear guide rail, which can adjust the cylinder group to a suitable position according to the height of the guardrail, and fix the position of the cylinder group by locking the slider of the linear guide rail. The cylinder is controlled to extend and retract through an electronic control system to achieve compression and relaxation of the trapezoidal guardrail.

[0010] Preferably, the long-stroke linear slide is fixed to the base as a whole by screws, and the movement of the linear slider is controlled by a servo motor, and precise positioning welding is performed in cooperation with the electronic control system; an aluminum alloy connecting plate is installed on the long-stroke linear slide, and a short-stroke linear slide and a medium-stroke linear slide are fixed on the connecting plate, and the two slides are in the same straight line. Two automatic welding guns are respectively installed on the short-stroke slide and the long-stroke slide with a handwheel. The short-stroke slide and the long-stroke slide are ball screw slides with a manual turntable and a locking device. When replacing the weldment, they are manually rotated to the appropriate position and locked to ensure the accuracy of the welding position.

[0011] Preferably, the electric control system can calculate the welding idle stroke distance according to the input guardrail total length, number of vertical pipes, pipe size and the welding position of the first pipe, control the welding gun to run at the set welding speed at each welding position, the welding length is the input pipe size, and the idle stroke speed and idle stroke length are preset in each idle stroke. At the same time, it controls the different movement trajectories of the electric slide, the extension and retraction of the cylinder, and the start and stop operations.

[0012] The beneficial effect of this patent is that it solves the problem of automatic welding of trapezoidal guardrails of different heights, lengths and pipe sizes, reduces the number of special processing personnel, improves interest rate production efficiency, reduces processing costs and improves welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The following is a further detailed description of this patent in conjunction with the accompanying drawings and specific implementation methods.

[0014] Figure 1 What is shown is a schematic diagram of the structure of this patent;

[0015] Figure 2 What is shown is a schematic diagram of the side structure of this patent;

[0016] Figure 3 What is shown is a top view of the structure of this patent;

[0017] Figure 4 Shown is a schematic diagram of the structure of the cylinder group and lifting mechanism of this patent.

[0018] In the figure: 1. welding gun; 2. hand wheel; 3. short-stroke linear slide; 4. long-stroke linear slide; 5. plum blossom coupling; 6. servo motor; 7. medium-stroke linear slide; 8. base; 9. height adjustment mechanism; 10. pin; 11. three-hole pull-gate; 13. linear guide; 14. cylinder group; 15. cylinder group height adjustment mechanism; 16. cylinder group sinking base; 17; moving spacing adjustment mechanism; 18. double-hole pull-gate; 19. moving spacing adjustment mechanism II; 20. spacing adjustment locking block; 21. welding gun fixture; 22. two-protection welding wire machine; 23. manual slide connecting plate; 30. surface pipe; 31. vertical pipe; 32. height adjustment hand wheel. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of this patent to clearly and completely describe the technical solutions in the embodiments of this patent. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the patent of this invention.

[0020] The welding of the trapezoidal guardrail can be divided into the same batch welding and different batch welding. When welding different batches, the distance between the cylinder group height adjustment mechanism (15) and the moving spacing adjustment mechanism (17) can be adjusted by the linear guide rail (13) according to the height of the trapezoidal guardrail of the same batch, and the welding gun can be adjusted to a suitable welding position by turning the hand wheel on the short slide and the middle slide. The height difference between the surface pipe and the vertical pipe of the trapezoidal guardrail of the same batch is changed, and then the spacing of the vertical pipes on the height adjustment mechanism and the spacing adjustment mechanism is adjusted according to the calculated spacing of the vertical pipes.

[0021] The same batch of trapezoidal guardrails will only change in length, while the height and the size of the surface tube will not change. When welding trapezoidal guardrails of different lengths, only the spacing of the vertical tube spacing adjustment mechanism is used according to the calculated spacing, and the other adjustment mechanisms do not need to be changed. Different batches of trapezoidal guardrails will change in length, height and the size of the pipe. When welding different batches of trapezoidal guardrails, it is necessary to adjust the positions of the cylinder group (14), the cylinder group height adjustment mechanism (15), the second moving spacing adjustment mechanism (19) and the sliders of the short-stroke linear slide (3) and the long-stroke linear slide (4) according to the height of the trapezoidal guardrail to ensure the accuracy of the clamping and welding positions. At the same time, the height of the adjustment plate of the height adjustment mechanism (9) and the cylinder group height adjustment mechanism (15) is adjusted according to the height difference between the vertical tube (31) and the surface tube (30) to ensure the accuracy of the clamping and welding positions. The other adjustment methods are the same as the adjustment methods of the same batch. In addition to being used for welding engineering trapezoidal guardrails, this patent can also be used for other engineering guardrails containing trapezoidal structures and other welded parts containing trapezoidal mechanisms.

[0022] In places where automatic welding is not used, the common practice is to make a fixture for each model of trapezoidal guardrail, which increases labor intensity and reduces work efficiency. Therefore, even if automatic welding is not used, the accuracy of the welding position can be determined by the fixture of this patent, and the quality of welding can be guaranteed without making a fixture for each model of guardrail.

[0023] The electronic control system consists of a programmable controller, an industrial touch screen, and several sensors and buttons. Enter the total length of the guardrail, the number of vertical pipes, the pipe size, and the position of the first pipe welding on the industrial touch screen. The programmable controller calculates the welding idle stroke distance and controls the welding gun to run at the set welding speed at each welding position. The welding length is the input pipe size. It moves at the preset idle stroke speed at each idle stroke, and the idle stroke length is the calculated idle stroke distance. Click the start button, the cylinder first clamps the trapezoidal guardrail, and then starts the motor to weld one side of the trapezoidal guardrail. After the welding is completed, the cylinder relaxes. Manually flip the guardrail over and press the start button again. The cylinder first clamps the trapezoidal guardrail, and then starts the motor to weld the other side of the trapezoidal guardrail. After the welding is completed, the cylinder relaxes. At this point, the trapezoidal guardrail welding is completed.

[0024] The carbon dioxide shielded gas welding machine wire feeder (22) is an important part of the carbon dioxide shielded gas welding machine, which is directly connected to the wire feeder hose. Placing it slightly higher than the welding gun (1) and at the center of the moving part can fully ensure that the welding gun can feed the wire smoothly during operation, and the wire feeder hose will not be too long.

Claims

1. A pneumatic clamping automatic welding equipment for trapezoidal guardrail, characterized in that The invention is composed of a base (8), a clamping mechanism, an action mechanism and an electric control system. A height adjustment mechanism (9), a cylinder group height adjustment mechanism (15), a moving spacing adjustment mechanism (19), a short-stroke linear slide (3), a long-stroke linear slide (4), a medium-stroke linear slide (7), a welding gun (1), and a carbon dioxide shielded gas welding machine wire feeder (22) are installed on the base (8); the cylinder group (14) is composed of five thin cylinders installed on a cylinder bracket and arranged at equal intervals. The cylinder group (14) and the rear cylinder group height adjustment mechanism (15) are installed on a linear guide rail (13) and can adjust the position of the cylinder group (14) according to the height of the guardrail. The cylinder group (14) is fixed by locking the slider of the linear guide rail (13). The cylinder is controlled to extend and retract by the electric control system to achieve the compression and relaxation of the trapezoidal guardrail. The long-stroke linear slide (4) is fixed on the base (8) as a whole by screws, and the movement of the linear slide is controlled by a servo motor, and precise positioning welding is performed in cooperation with the electronic control system; an aluminum alloy connecting plate is installed on the long-stroke linear slide (4), and a short-stroke linear slide (3) and a medium-stroke linear slide (7) are fixed on the connecting plate, and the two slides are on the same straight line; two automatic welding guns (1) are respectively installed on the short-stroke linear slide (3) with a hand wheel (2) and the long-stroke linear slide (4); the short-stroke linear slide (3) and the long-stroke linear slide (4) are ball screw slides with a manual turntable and a locking device, and when replacing the welding parts, they are manually rotated to adjust to the appropriate position and locked to ensure the accuracy of the welding position; The height adjustment mechanism (9) is composed of a flat plate for placing the surface tube, two dovetail groove guides fixed on the base, and two height adjustment handwheels (32) with screw rods installed at the bottom. The height difference between the surface tube (30) and the vertical tube (31) is manually adjusted by rotating the two height adjustment handwheels (32), thereby ensuring the accurate shape of the trapezoidal guardrail after clamping. The height adjustment plate of the cylinder group height adjustment mechanism (15) is connected to the cylinder group (14) and can be adjusted according to the height of the trapezoidal guardrail. It is guided by four dovetail grooves to limit the height adjustment plate to move only up and down. Two height adjustment handwheels (32) with screw rods are installed at the bottom. The height difference between the surface tube and the vertical tube is manually adjusted by rotating the height adjustment handwheels (32), thereby ensuring the accurate shape of the trapezoidal guardrail after clamping.

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