Welding device for metal showing stand production

Abstract

The invention relates to the technical field of welding devices, in particular to a metal showing stand production welding device which comprises a base, a multi-axis mechanical arm arranged on the base, a welding gun installed at the end of the multi-axis mechanical arm, two supports symmetrically and fixedly connected to the base and a rectangular overturning frame. The two main rods are rotationally connected to the opposite sides of the two supports correspondingly, mounting rods are slidably connected between the ends of the same sides of the tops of the two main rods, the opposite sides of the two mounting rods are detachably connected with a plurality of first clamps, and the first clamps are connected with second clamps through connecting rods. According to the invention, a cooperative adjustment system that the distance between the mounting rods is adjusted under the driving of the two-way screw rod, the fine adjustment of the transverse displacement of the clamp is realized by matching the sliding chute II with the positioning pin, and the angle of the connecting rod linkage type clamp II is adjusted is adopted, so that the clamp I and the clamp II can form a composite clamping network to accurately match the bending feature point and the overhanging part of the special-shaped skeleton; and distributed clamping of multiple stress points is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of welding devices, and in particular to a welding device for producing metal display racks. Background Art

[0002] Metal display frames are important carriers in the field of commercial display. Their skeleton structures often use special-shaped pipes or complex geometric configurations. Traditional welding processes mostly use fixed fixtures with manual adjustment of welding angles, which is time-consuming and labor-intensive. Currently, multi-axis robotic arms with welding guns are often used in the market in conjunction with flip frame fixtures to achieve skeleton posture adjustment through the flip frame. However, in actual applications, it is found that the existing flip frame fixtures use equidistantly distributed rigid clamping units, and the spacing and angles of the clamping points cannot be adjusted, resulting in insufficient local clamping force, workpiece slippage, and even falling off when clamping special-shaped skeletons. Especially for skeletons with asymmetric bending structures, it is difficult for fixed fixtures to simultaneously achieve coordinated clamping of the main force points and auxiliary support points. During the flip welding process, the workpiece is easily deformed due to uneven stress distribution. In addition, existing fixtures mostly use a single-point independent locking mode, which requires point-by-point adjustment during batch clamping, significantly increasing auxiliary operation time. Summary of the invention

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a welding device for producing a metal display rack.

[0004] Technical solution: A welding device for the production of metal display racks, including a base, a multi-axis robotic arm arranged on the base, a welding gun installed on the end of the multi-axis robotic arm, two supports symmetrically fixed to the base and a rectangular flip frame, the two sets of opposite sides of the flip frame are respectively a main rod and a secondary rod, the two main rods are rotatably connected to the opposite sides of the two supports, and the top ends of the two main rods on the same side are slidably connected with a mounting rod, and the opposite sides of the two mounting rods can be detachably connected with multiple clamps one, the clamp one is connected to the clamp two through a connecting rod, and the clamp two can rotate around the clamp one to change the clamping point.

[0005] Furthermore, both clamp one and clamp two include a fixed frame, a fixed clamping plate, a movable clamping plate and a screw rod. The fixed clamping plate is fixedly connected to the fixed frame. A slide groove one is opened on the fixed frame. The movable clamping plate is partially slidably connected in the slide groove one. The screw rod is rotatably connected in the slide groove one. The movable clamping plate is threadedly connected to the screw rod. The fixed frame of clamp one is detachably connected to the mounting rod, and the two ends of the connecting rod are respectively hinged to the fixed frame of clamp two and the fixed clamping plate of clamp one.

[0006] Furthermore, the fixing frame of the clamp one is slidably connected with positioning pins, and the two mounting rods have sliding grooves 2 on the opposite sides thereof. The fixing frame of the clamp one is partially slidably connected in the sliding grooves 2, and the two mounting rods have multiple positioning holes connected with the sliding grooves 2 on the opposite sides thereof. The positioning pins can cooperate with any positioning hole to fix the fixing frame of the clamp one.

[0007] Furthermore, two main rods are rotatably connected with bidirectional screw rods, and the ends on the same side of the two mounting rods are respectively threadedly connected to the two threaded sections of the bidirectional screw rods.

[0008] Furthermore, the top ends of the screw rods of all the clamps on the mounting rod are detachably connected to gears, a moving rod is slidably connected to the mounting rod, one end of the moving rod is connected to the mounting rod with an elastic part, and the moving rod is detachably connected to the same number of racks as the gears, and the tooth shape of the racks meshes with the gears.

[0009] Furthermore, at least one support is provided with a driving motor for driving the turning frame to rotate.

[0010] Furthermore, the connecting rod is a telescopic structure.

[0011] Furthermore, the support is a liftable structure.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention realizes a coordinated adjustment system of the spacing adjustment of the mounting rods driven by a bidirectional screw, the fine adjustment of the lateral displacement of the clamp by the second slideway in cooperation with the positioning pin, and the angle adjustment of the second clamp by a connecting rod linkage, so that the first clamp and the second clamp can form a composite clamping network, accurately match the bending feature points and the overhanging parts of the special-shaped skeleton, and realize distributed clamping of multiple stress points.

[0013] 2. The present invention uses the linkage between the gear and the rack, and a single push-pull action of the moving rod can synchronously drive the screws of all the clamps on the same mounting rod to rotate, thereby realizing the synchronous locking or unlocking of batch clamps, which can reduce the clamping time compared with the traditional point-by-point adjustment method. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0015] Figure 2 It is a schematic diagram of the installation structure of the turning frame and the support of the present invention.

[0016] Figure 3 It is a schematic diagram of the installation structure of the installation rod and the turning frame of the present invention.

[0017] Figure 4 It is a cross-sectional view of the installation structure of the main rod of the present invention.

[0018] Figure 5 It is a schematic diagram of the installation structure of the clamp 1, the clamp 2 and the installation rod of the present invention.

[0019] Figure 6 It is a schematic diagram of the three-dimensional structure of the clamp 2 and the connecting rod of the present invention.

[0020] Figure 7It is a schematic diagram of the partial structure of the gear and rack of the present invention.

[0021] Figure 8 It is a partial structural cross-sectional view of the mounting rod and the fixing frame of the present invention.

[0022] Figure numbers: 1-base, 2-multi-axis robotic arm, 3-welding gun, 4-support, 5-flip frame, 501-main rod, 502-auxiliary rod, 6-mounting rod, 7-clamp one, 8-clamp two, 9-connecting rod, 10-fixed frame, 11-fixed splint, 12-moving splint, 13-screw, 14-slide one, 15-locating pin, 16-slide two, 17-locating hole, 18-gear, 19-moving rod, 20-elastic part, 21-rack, 22-bidirectional screw, 23-driving motor. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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. 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.

[0024] See also Figure 1-Figure 8 A welding device for producing metal display racks comprises a base 1, a multi-axis robot arm 2 arranged on the base 1, a welding gun 3 installed at the end of the multi-axis robot arm 2, two supports 4 symmetrically fixed to the base 1 and a rectangular flip frame 5. In this embodiment, the support 4 is a liftable structure, and the two sets of opposite sides of the flip frame 5 are respectively a main rod 501 and a sub-rod 502. The two main rods 501 are rotatably connected to the opposite sides of the two supports 4, and a mounting rod 6 is slidably connected between the ends on the same side of the top of the two main rods 501. The opposite sides of the two mounting rods 6 can be detachably connected with multiple clamps 7. The clamp 7 is connected to the clamp 2 8 through a connecting rod 9. The clamp 2 8 can rotate around the clamp 7 to change the clamping point. The design of this composite clamping network enables the present invention to accurately match the bending feature points and the overhanging parts of the special-shaped skeleton to achieve distributed clamping of multiple stress points.

[0025] Furthermore, both clamp 1 7 and clamp 2 8 include a fixed frame 10, a fixed clamping plate 11, a movable clamping plate 12 and a screw 13. The fixed clamping plate 11 is fixedly connected to the fixed frame 10. A slide groove 14 is opened on the fixed frame 10. The movable clamping plate 12 is partially slidably connected in the slide groove 14. The screw 13 is rotatably connected in the slide groove 14. The movable clamping plate 12 is threadedly connected to the screw 13. The fixed frame 10 of clamp 1 7 is detachably connected to the mounting rod 6. The two ends of the connecting rod 9 are respectively hinged to the fixed frame 10 of clamp 2 8 and the fixed clamping plate 11 of clamp 1 7. In this embodiment, the connecting rod 9 is a telescopic structure to expand the moving range of clamp 2 8.

[0026] In order to achieve fine-tuning of the lateral displacement of the clamp, in this embodiment, a positioning pin 15 is slidably connected to the fixed frame 10 of the clamp 7, and a second slide groove 16 is opened on the opposite sides of the two mounting rods 6. The fixed frame 10 of the clamp 7 is partially slidably connected in the second slide groove 16, and the two mounting rods 6 have a plurality of positioning holes 17 connected to the second slide groove 16 on the opposite sides. The positioning pin 15 can cooperate with any positioning hole 17 to fix the fixed frame 10 of the clamp 7. This design not only improves the positioning accuracy of the clamp, but also helps to adapt to skeletons of different sizes.

[0027] In order to drive the adjustment of the spacing between the mounting rods 6, in this embodiment, a bidirectional screw rod 22 is rotatably connected inside the two main rods 501, and the same side ends of the two mounting rods 6 are threadedly connected to the two threaded segments of the bidirectional screw rod 22 respectively. By synchronously rotating the bidirectional screw rod 22, the two mounting rods 6 can be driven to slide synchronously in opposite directions along the length direction of the main rod 501, thereby achieving precise adjustment of the clamp spacing.

[0028] In addition, in this embodiment, a drive motor 23 is installed on the support 4 close to the multi-axis robot arm 2. The output shaft of the drive motor 23 is connected to the main rod 501 of the flip frame 5. Through the drive of the drive motor 23, the spatial angle of the flip frame 5 can be adjusted in real time to achieve three-dimensional all-round coverage welding of the skeleton.

[0029] Specifically, when in use, firstly, the flip frame 5 is lifted to an appropriate height through the support 4, and then the two mounting rods 6 are synchronously slid in opposite directions along the length direction of the main rods 501 by synchronously rotating the bidirectional screw rods 22 in the two main rods 501, so as to adjust the spacing between the clamps 1 7 on the two mounting rods 6 to adapt to frames of different lengths, and the position of a single clamp 1 7 can be fine-tuned laterally by sliding the fixing frame 10 of the clamp 1 7 along the slide groove 2 16 and inserting the corresponding positioning pins 15 into different positioning holes 17, and the position of the single clamp 1 7 can be fine-tuned laterally by operating the connecting rod 9 to rotate around the hinge point between the connecting rod 9 and the fixed clamp plate 11 of the clamp 1 7, so that the position of the clamp 2 8 is changed, and the fixing frame 10 of the clamp 2 8 is rotated around The hinge point between it and the connecting rod 9 rotates, thereby being able to change the clamping point of the clamp 2 8 to adapt to the multi-angle clamping of the special-shaped skeleton. Then, the skeleton of the display frame to be welded is placed between the fixed clamping plate 11 and the movable clamping plate 12 of the clamp 1 7 and the clamp 2 8. Then, the screw 13 is rotated to make the movable clamping plate 12 slide along the slide groove 14 close to the fixed clamping plate 11, so that the skeleton is clamped by the movable clamping plate 12 and the fixed clamping plate 11. After that, the welding gun 3 is driven by the multi-axis robot arm 2 to move along the preset trajectory to weld the skeleton. At the same time, the turning frame 5 can be driven to rotate by the driving motor 23 to adjust the spatial angle of the skeleton in real time to achieve three-dimensional all-round coverage welding of the skeleton.

[0030] In order to improve the batch clamping efficiency of the clamp 7, in this embodiment, the top end of the screw rod 13 of all clamps 7 on the mounting rod 6 is detachably connected to the gear 18, and a moving rod 19 is slidably connected to the mounting rod 6. One end of the moving rod 19 is connected to the mounting rod 6 with an elastic member 20, and the moving rod 19 is detachably connected with the same number of racks 21 as the gear 18. The tooth shape of the rack 21 is meshed with the gear 18. The elastic member 20 is used to keep the moving rod 19 stable on the mounting rod 6 when not affected by external force, and to provide a reset force for the moving rod 19.

[0031] Specifically, when in use, the gear 18 is installed on the top of the screw 13 of the clamp 7, and the rack 21 is correspondingly installed on the moving rod 19 by bolts, so that when the rack 21 moves relative to the gear 18, the screw 13 of the clamp 7 can be driven to rotate through the gear 18, thereby driving the movable clamp 12 to slide upward along the slide groove 14. More specifically, when it is necessary to make all the clamps 7 on the same mounting rod 6 to synchronously release the clamping of the skeleton, the moving rod 19 is pushed to overcome the elastic force of the elastic member 20 to slide, and the rack 21 drives the corresponding gear 18 to rotate synchronously, so that the screws 13 of multiple clamps 7 are synchronously Rotate, so that the movable clamping plate 12 of the clamp 7 moves upward and away from the fixed clamping plate 11, thereby releasing the clamp 7 from the frame. In this way, a single operation can achieve the synchronous loosening of all the clamps 7 on the same mounting rod 6, thereby improving the operating efficiency of the clamp 7. Subsequently, the frame is taken out from between the fixed clamping plate 11 and the movable clamping plate 12 of the clamp 7, and then the moving rod 19 is loosened. The elastic member 20 returns to its original state due to its own elastic action, and drives the moving rod 19 to move in the opposite direction and reset. At the same time, under the meshing action of the rack 21 and the gear 18, the screw 13 rotates in the opposite direction, driving the movable clamping plate 12 to slide in the opposite direction and reset along the slide groove 14.

[0032] In summary, the present invention, through a series of designs and innovations, not only improves the adaptability and flexibility of the welding device for metal display rack production, but also helps to achieve precise clamping and all-round welding of special-shaped frames.

[0033] Although the present invention is described in detail with reference to the above embodiments, it is obvious to those skilled in the art through this disclosure that various changes or modifications may be made to the present invention without departing from the principle and spirit of the present invention defined by the claims. Therefore, the detailed description of the embodiments of the present disclosure is only used to explain, not to limit the present invention, but the scope of protection is limited by the content of the claims.

Claims

1. A welding device for producing metal display racks, characterized in that: The invention comprises a base (1), a multi-axis mechanical arm (2) arranged on the base (1), a welding gun (3) mounted on the end of the multi-axis mechanical arm (2), two supports (4) symmetrically fixed to the base (1) and a rectangular turning frame (5), wherein two sets of opposite sides of the turning frame (5) are respectively a main rod (501) and a secondary rod (502), the two main rods (501) are rotatably connected to the opposite sides of the two supports (4), a mounting rod (6) is slidably connected between the ends on the same side of the top of the two main rods (501), and the opposite sides of the two mounting rods (6) are detachably connected with a plurality of clamps (7), the clamps (7) are connected to clamps (8) via connecting rods (9), and the clamps (8) can rotate around the clamps (7) to change the clamping point.

2. A welding device for producing a metal display stand according to claim 1, characterized in that: The clamp 1 (7) and the clamp 2 (8) both comprise a fixed frame (10), a fixed clamping plate (11), a movable clamping plate (12) and a screw rod (13); the fixed clamping plate (11) is fixedly connected to the fixed frame (10); a slide groove 1 (14) is provided on the fixed frame (10); the movable clamping plate (12) is partially slidably connected to the slide groove 1 (14); the screw rod (13) is rotatably connected to the slide groove 1 (14); the movable clamping plate (12) is threadedly connected to the screw rod (13); the fixed frame (10) of the clamp 1 (7) is detachably connected to the mounting rod (6); and the two ends of the connecting rod (9) are respectively hinged to the fixed frame (10) of the clamp 2 (8) and the fixed clamping plate (11) of the clamp 1 (7).

3. A welding device for producing a metal display stand according to claim 2, characterized in that: The fixing frame (10) of the clamp (7) is slidably connected with a positioning pin (15), and the two mounting rods (6) are provided with a second slide groove (16) on the opposite sides thereof. The fixing frame (10) of the clamp (7) is partially slidably connected in the second slide groove (16), and the two mounting rods (6) are provided with a plurality of positioning holes (17) connected with the second slide groove (16) on the opposite sides thereof. The positioning pin (15) can cooperate with any of the positioning holes (17) to fix the fixing frame (10) of the clamp (7).

4. A welding device for producing a metal display stand according to claim 3, characterized in that: A bidirectional screw rod (22) is rotatably connected inside each of the two main rods (501), and the ends on the same side of the two mounting rods (6) are respectively threadedly connected to two threaded sections of the bidirectional screw rod (22).

5. A welding device for producing a metal display rack according to claim 4, characterized in that: The top ends of the screw rods (13) of all the clamps (7) on the mounting rod (6) are detachably connected to a gear (18); a moving rod (19) is slidably connected to the mounting rod (6); one end of the moving rod (19) is connected to the mounting rod (6) by an elastic member (20); the moving rod (19) is detachably connected to the same number of racks (21) as the gears (18); the tooth shape of the racks (21) meshes with the gears (18).

6. A welding device for producing a metal display stand according to claim 5, characterized in that: At least one of the supports (4) is provided with a driving motor (23) for driving the turning frame (5) to rotate.

7. A welding device for producing a metal display stand according to claim 6, characterized in that: The connecting rod (9) is a telescopic structure.

8. A welding device for producing a metal display rack according to claim 7, characterized in that: The support (4) is a liftable structure.

Images