A welding machine for guard rails

Abstract

The application discloses a special equipment for guardrail welding, which comprises a portal frame, a slide rail is installed at the bottom of the portal frame, a turnover frame is installed on the portal frame, a mechanical arm assembly reciprocally moves on the slide rail, a welding beam doing mirror image motion is arranged on the mechanical arm assembly, and two welding guns are clamped on the mirror image motion welding beam to do synchronous mirror image welding. The application has small workpiece deformation, accurate positioning, simple structure, simple teaching programming, and can realize double-side welding of the workpiece by teaching one side, the teaching program can be quickly copied to the mirror image station, the whole production process is simple to operate, and the production efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to a welding machine specifically designed for guardrails, belonging to the technical field of welding equipment. Background Technology

[0002] The guardrail has many welding points, and it requires spot welding before full welding. The welding process requires multiple flipping, which makes manual welding inefficient. Due to the large deformation of the workpiece, it is difficult to achieve robotic welding.

[0003] To solve this technical problem, application number 202221603344.8 discloses a welding support frame for metal railing processing, including a support frame (1), the support frame (1) including an I-shaped frame (101); both ends of the I-shaped frame (101) are vertically fixed with pillars (102); a lifting rod (2) is sleeved between the top ends of the two pillars (102); extension rods (3) are inserted into both sides of the lifting rod (2); a flipping frame (4) is rotatably connected between both sides of the two pillars (102); the two ends of the flipping frame (4) are sleeved with the extension rods (3); the extension rods (3) The upper surface of the rod (2) is provided with a linear array of support brackets (5) between the two sides of the lifting rod (2). Through the cooperation of the support frame, lifting frame, extension rod, flipping frame and support brackets, the support brackets set between the rectangular end sleeves on both sides of the extension rod and the lifting rod adjust and place the spacing of the longitudinal rods, ensuring the neatness of the metal guardrail during welding operations. At the same time, under the action of the adjusting screw, the lifting rod is raised and lowered and the two flipping frames are pushed to rotate, adjusting the distance between the extension rod and the lifting rod. Metal guardrails of different lengths and sizes can be supported and welded, meeting the needs of actual processing.

[0004] Although the aforementioned patent provides a solution, it is very cumbersome to use and has low production efficiency. Guardrail welding requires a more efficient specialized welding equipment, which has not been reported in existing technologies. Summary of the Invention

[0005] To overcome the aforementioned problems, the present invention provides a special welding equipment for guardrails with high welding efficiency.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is: a special equipment for welding guardrails, including a gantry frame, a slide rail installed at the bottom of the gantry frame, a flipping frame installed on the gantry frame, a robotic arm assembly that moves back and forth on the slide rail, a welding beam that performs mirror motion on the robotic arm assembly, and two welding torches clamped on the mirror motion welding beam to perform synchronous mirror welding.

[0007] Furthermore, the flipping frame includes a flipping beam, and a flipping shaft installed in the flipping beam is mounted on the shaft support frame at the upper end of the gantry frame via bearings. One end of the flipping shaft is connected to a flipping motor. The axis of the flipping shaft coincides with the mirror surface of the workpiece and also with the mirror surface of the mirror motion welding beam. Two welding torches simultaneously weld the two symmetrical positions of the workpiece. After the flipping motor drives the workpiece to flip 180 degrees, the two welding torches still simultaneously weld the two symmetrical positions of the workpiece, thereby minimizing the impact of local welding deformation on the overall workpiece.

[0008] Furthermore, several upper hook frames are installed on the upper end face of the flipping beam, and several lower hook frames are installed on the lower end face. The center of the hook opening of the upper hook frame and the lower hook frame coincides with the mirror image of the workpiece, and the hook head of the upper hook frame is formed by the lever of the lever cylinder, which is used to quickly pick up and put down the workpiece.

[0009] Furthermore, the upper and lower end faces of the flipping beam are provided with positioning plates with several positioning slots, and slot templates are installed in the positioning slots. Different slot templates can be replaced according to different workpiece pipe materials, thereby improving the versatility of the equipment.

[0010] Furthermore, several rotary clamping cylinders are installed on the side wall of the flipping beam to quickly clamp individual pipe materials. Together with the hooks of the upper and lower hook frames, they quickly assemble the workpieces from loose materials into a weldable body, facilitating welding. The slot template is a slotted module for fixing the workpiece. Different templates can be replaced according to different workpieces. The positions of the upper and lower hook frames that hold the workpiece are on the same plane as the axis of the flipping beam. When the rotary clamping cylinders are in the clamping state, the clamping arms of the rotary clamping cylinders and the upper and lower hook frames hold the workpiece on the upper and lower hook frames.

[0011] Furthermore, the flipping frame is configured as a dual-station mirror flipping frame, and the flipping frame and the mirror flipping frame are mirrored with respect to the central axis of the slide rail.

[0012] Furthermore, the robotic arm assembly includes a main beam, a moving beam, a shifting screw, and a welding beam. The main beam is mounted on a slide rail via a sliding block. The moving beam is slidably mounted on the main beam and connected to a lifting screw, driven by a lifting motor to slide up and down along the main beam. The welding beam is slidably mounted on the moving beam and connected to a shifting screw, driven by a shifting motor to move horizontally along the moving beam. Two mirror-image welding torch supports are slidably mounted on the welding beam, and both welding torch supports are connected to mirror screws, driven by mirror motors to move horizontally along the welding beam. A clamping rod is rotatably connected to each of the two welding torch supports. One end of the clamping rod is connected to a swing motor, and the other end of the clamping rod clamps the welding torch. The two swing motors are controlled by a single control signal, but rotate in opposite directions. Mirror welding of both sides of the workpiece can be achieved by only teaching the robotic arm to one side, and the teaching program can be quickly mirror-copied to the mirror station.

[0013] The beneficial technical effects of this invention are: small workpiece deformation, accurate positioning, simple structure, high welding efficiency, simple teaching programming, double-sided welding of workpiece can be achieved by teaching only one side, the teaching program can be quickly mirrored and copied to the mirror station, the whole production process is simple to operate, and production efficiency is greatly improved. Attached Figure Description

[0014] The invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is the left view of the present invention;

[0016] Figure 2 This is a side view of the present invention;

[0017] Figure 3 This is a partial top view of the present invention;

[0018] Figure 4 This is a partial rear view of the present invention;

[0019] In the diagram: 1. Gantry frame, 2. Slide rail, 3. Main beam, 4. Moving beam, 5. Welding beam, 6. Shifting screw, 7. Mirror screw, 8. Tilting beam, 9. Mirror tilting beam, 10. Tilting motor, 11. Lifting screw, 201. Swing motor, 202. Clamping rod, 203. Welding torch, 204. Welding torch bracket, 301. Mirror swing motor, 302. Mirror clamping rod, 303. Mirror welding torch, 304. Mirror welding torch bracket, 401. Rotary clamping cylinder, 402. Lever cylinder, 403. Upper hook frame, 404. Lower hook frame, 405. Positioning plate, 406. Groove template. Detailed Implementation

[0020] Example 1

[0021] like Figures 1-4 The guardrail welding equipment shown includes a gantry frame 1, a slide rail 2 installed at the bottom of the gantry frame 1, a tilting frame installed on the gantry frame 1, a robotic arm assembly that reciprocates on the slide rail 2, and a welding beam that performs mirror motion on the robotic arm assembly. Two welding torches are clamped on the mirror-moving welding beam for synchronous mirror welding. The tilting frame is configured as a dual-station mirror tilting frame, and the tilting frame 8 and the mirror tilting frame 9 are mirror images of each other with respect to the central axis of the slide rail.

[0022] The tilting frame includes a tilting beam 8. The tilting shaft installed in the tilting beam 8 is mounted on the shaft support frame at the upper end of the gantry frame 1 via bearings. One end of the tilting shaft is connected to the tilting motor 10. The axis of the tilting shaft 10 coincides with the mirror surface of the workpiece and also with the mirror surface of the mirror motion welding beam. Two welding torches simultaneously weld the two symmetrical positions of the workpiece. After the tilting motor 10 drives the workpiece to rotate 180 degrees, the two welding torches still simultaneously weld the two symmetrical positions of the workpiece, thereby minimizing the impact of local welding deformation on the overall workpiece.

[0023] Several upper hook frames 403 are installed on the upper end face of the flip beam 8, and several lower hook frames 404 are installed on the lower end face. The center of the hook opening of the upper hook frame 403 and the lower hook frame 404 coincides with the mirror image of the workpiece, and the hook head of the upper hook frame 403 is formed by the lever of the lever cylinder 402, which is used to quickly pick up and put down the workpiece.

[0024] The upper and lower end faces of the flip beam 8 are provided with positioning plates 405 with several positioning slots. Slot templates 406 are installed in the positioning slots. Different slot templates 406 can be replaced according to different workpiece pipe materials, thereby improving the versatility of the equipment.

[0025] Several rotary clamping cylinders 401 are installed on the side wall of the flip beam 8 to quickly clamp loose pipe materials. Together with the hooks of the upper hook frame 403 and the lower hook frame 404, they quickly assemble the workpieces from loose materials into a weldable body, facilitating welding. The slot template 406 is a slotted module for fixing the workpiece. Different templates can be replaced according to different workpieces. The positions of the upper hook frame 403 and the lower hook frame 404 that hold the workpiece are on the same plane as the axis of the flip beam. When the rotary clamping cylinder 401 is in the clamping state, the clamping arm of the rotary clamping cylinder 401 and the upper and lower hook frames clamp the workpiece on the upper and lower hook frames.

[0026] The robotic arm assembly includes a main beam 3, a moving beam 4, a shifting screw 6, and a welding beam 5. The main beam 3 is mounted on the slide rail 2 via a sliding block. The moving beam 4 is slidably mounted on the main beam 3 and connected to the lifting screw 11, and is driven by the lifting motor to slide up and down along the main beam 3. The welding beam 5 is slidably mounted on the moving beam 4 and connected to the shifting screw 6, and is driven by the shifting motor to move horizontally along the moving beam 4. Two mirror-image welding torch supports 204 and 304 are slidably mounted on the welding beam 5, and both welding torch supports are connected to the mirror screw 7, and are driven by the mirror motor to move horizontally along the welding beam. A clamping rod is rotatably connected to each of the two welding torch supports. One end of the two clamping rods is connected to the swing motor 201 and the mirror swing motor 301, respectively, and the other end of the clamping rods clamps the welding torch 203 or the mirror welding torch 303. The two swing motors are controlled by a single control signal, but rotate in opposite directions. Only one side of the robotic arm needs to be taught to achieve mirror welding of both sides of the workpiece, and the teaching program can be quickly mirror-copied to the mirror station.

[0027] This embodiment features high welding efficiency, minimal workpiece deformation, accurate positioning, simple structure, and easy teaching programming. Double-sided welding of the workpiece can be achieved by teaching only one side. The teaching program can be quickly mirrored and copied to a mirror station. The entire production process is simple to operate and significantly improves production efficiency.

[0028] The above embodiments are merely illustrative of the technical solutions of the present invention and should not be construed as limiting the technical solutions of the present invention. Any simple improvements made based on the present invention are within the protection scope of the present invention.

Claims

1. A guardrail welding special purpose apparatus comprising a gantry, characterised in that: The application discloses a welding device for mirror image welding of workpieces, which comprises a gantry, a turnover frame installed on the gantry, a mechanical arm assembly reciprocatingly installed on the sliding rail, a mirror image motion welding beam arranged on the mechanical arm assembly, and two welding guns clamped on the mirror image motion welding beam to synchronously perform mirror image welding.

2. A guardrail welding apparatus as defined in claim 1, wherein: According to different workpiece pipes, different slot templates are replaced.

3. The guardrail welding fixture of claim 1, wherein: The slot template is a slot module for fixing workpieces, different templates are replaced according to different workpieces, the positions of the upper hook frame and the lower hook frame clamping the workpiece are on the same plane as the axis of the turnover beam, and when the rotary clamping cylinder is in the clamping state, the clamping arms of the rotary clamping cylinder clamp the workpiece on the upper hook frame and the lower hook frame.

4. The guardrail welding fixture of claim 1, wherein: The turnover frame is arranged as a double-station mirror image turnover frame, and the turnover frame and the mirror image turnover frame are mirror images with respect to the central axis of the sliding rail.

5. The guardrail welding fixture of claim 1, wherein: The mechanical arm assembly comprises a main beam, a moving beam, a transposition screw, and a welding beam, the main beam is installed on the sliding rail through a sliding seat, the moving beam is slidingly installed on the main beam and connected with a lifting screw, and is driven by a lifting motor to slide up and down along the main beam, the welding beam is slidingly installed on the moving beam and connected with a transposition screw, and is driven by a transposition motor to horizontally move along the moving beam, two mirror image welding gun supports are slidingly installed on the welding beam and connected with mirror image screws, and are driven by mirror image motors to horizontally move along the welding beam, a clamping rod is rotationally connected to each of the two welding gun supports, one end of the clamping rod is connected with a swing motor, and the other end of the clamping rod clamps the welding gun, the two swing motors are controlled by one control signal but rotate in opposite directions, only one mechanical arm needs to be taught to control, mirror image welding of the workpiece can be realized, and a teaching program can be quickly copied to a mirror image station.

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