A positioning device for profile steel welding and a welding machine

Abstract

The present application relates to the technical field of workpiece positioning, and discloses a positioning device for profile steel welding and a welding machine, which solves the problems of the existing profile steel welding positioning device, such as model speciality, poor universality, frequent change of model, long preparation time and complex operation. The device triggers the pin rod through the gravity of the profile steel, and the supporting block is rotated into position before the profile steel plane is contacted, so as to avoid friction and jamming. The supporting block supports the plane of the lower side of the profile steel, and the clamping jaw and the supporting block work cooperatively to adapt and clamp various open inner right-angle profile steels such as I-beams, channel steels and angle steels without replacing the clamp. The overall structure is compact and the positioning is accurate, which significantly shortens the model changing time, reduces the operation complexity, and improves the welding efficiency and stability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of positioning of welded workpieces, in particular to a positioning device for a profile steel welding machine. BACKGROUND

[0002] Profile steels come in various models, such as I-beams, channel steels, angle steels, etc. Combining and welding multiple profile steels can be used to make products such as pipeline supports, workbench supports, air pipe flanges, etc.

[0003] Before welding, the profile steels need to be fixed by a positioning device to achieve pre-docking and pre-fixing of the welding parts of the multiple profile steels, so as to ensure the quality of the welded joints of the profile steel products after welding, and ensure that the assembly precision and structural performance meet the design requirements.

[0004] However, the existing profile steel positioning device is usually designed according to a specific profile steel model. When welding profile steels of different models, the versatility of the positioning device is poor. For example, a positioning device for channel steels cannot be easily adapted to the fixing of angle steels. Therefore, when the existing positioning device is applied to the welding of profile steels of different models, it often needs to be frequently replaced or adjusted, which increases the production preparation time and operational complexity and reduces the welding efficiency.

[0005] In addition, frequent replacement of the positioning device can easily lead to unstable positioning accuracy, affecting the consistency of the welding quality. Therefore, how to improve the versatility and adaptability of the profile steel welding positioning device has become a technical problem to be solved in the current profile steel welding production process. SUMMARY

[0006] The purpose of the present application is to provide a positioning device for profile steel welding and a welding machine, which solves the problems of the existing profile steel welding positioning device, such as model specificity, poor versatility, frequent model change, long preparation time, and complex operation.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solution: a positioning device for profile steel welding, comprising a clamping mechanism, the clamping mechanism comprising a clamping seat, the clamping seat being provided with a pair of clamping jaws on the upper side, the pair of clamping jaws being used to clamp one vertical edge of the profile steel;

[0008] One side of the clamping seat is provided with a supporting assembly, the supporting assembly comprising a movable seat, the movable seat being provided with a rotating rotating rod on the upper side, the upper end of the rotating rod being fixedly connected with a supporting block, the supporting block being used to support the planar part on the lower side of the profile steel, the planar part being adjacent to the edge of the profile steel clamped by the pair of clamping jaws;

[0009] A pin is provided on the inner side of the rotating rod, and a rotating unit is provided on the lower side of the rotating rod. The upper end of the pin passes through and protrudes to the upper surface of the support block. When the steel section is placed on the support block, the pin is pressed down, and the downward moving pin triggers the rotating unit, so that the rotating unit drives the rotating rod to rotate, prompting the rotating support block to adapt to the flat portion on the lower side of the supporting steel section.

[0010] As a further description of the above technical solution: the rotating unit includes an assembly cylinder on one side of the movable seat, and an assembly cavity for rotating and assembling the rotating rod is opened on the inner side of the assembly cylinder. The rotating unit also includes a rotating component assembled on the inner side of the assembly cavity. The rotating component is triggered by the downward-moving pin rod to automatically control the rotation of the rotating rod so that the rotated support block adapts to the flat portion on the lower side of the supporting steel section.

[0011] As a further description of the above technical solution: the rotating component includes:

[0012] A rotating disk is fixedly connected to the lower end of the rotating rod, a pushing block 1 is provided at the axis center position on the lower side of the rotating disk, and a torsion spring is provided on the upper side of the rotating disk;

[0013] A second pushing block is provided at the lower end of the pin rod, and a push spring is provided on the lower side of the pin rod. The second pushing block and the first pushing block are slidably matched to control the rotation of the rotating disk.

[0014] Under normal conditions, the push spring elastically pushes the pin rod to protrude to the upper surface of the support block. At the same time, the pushing block 2 that moves upward with the pin rod cooperates with the pushing block 1, so that the rotating disk overcomes the elasticity of the torsion spring and drives the rotating rod to rotate, so that the support block is parallel to the length direction of the steel section.

[0015] As a further description of the above technical solution: one side of the pushing block 2 is fixedly connected to a limiting block, the inner wall of the assembly cavity is provided with a limiting slot, and the limiting block is slidably arranged inside the limiting slot.

[0016] As a further description of the above technical solution: a ball is arranged on the lower side of the rotating disk, and an annular groove for the ball to move is opened on the lower surface of the rotating disk.

[0017] As a further description of the above technical solution: the movable seat is provided with one on each side of the clamping jaw, and the two supporting blocks are symmetrically arranged with the clamping jaw as the center.

[0018] As a further description of the above technical solution: the clamping jaws include a movable jaw and a fixed jaw, and a telescopic cylinder 1 for horizontally pushing the movable jaw is provided on the inner side of the clamping base.

[0019] As a further description of the above technical solution: the movable seat is slidably arranged on the outside of the fixed claw, and a telescopic cylinder 2 is arranged on the lower side of the movable seat to push it to move up and down.

[0020] As a further description of the above technical solution: one end of the support block is set as an arc surface and is in the same vertical plane as the surface wall of the fixed claw for clamping the steel section, and the other end of the support block is set with a rounded corner close to the rotation direction.

[0021] A welding machine, in particular a welding machine for steel sections, comprises a slide module, a welding robot arm and a welding head arranged at the end of the welding robot arm. The slide of the slide module is equipped with at least two clamping mechanisms.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0023] 1. This device uses the gravity of the steel section to trigger the pin, causing the support block to rotate into place before the flat surface of the steel section contacts it, thus avoiding friction and jamming. The support block supports the flat surface on the lower side of the steel section. The clamping jaws and the support block work together to adapt and clamp a variety of open internal right-angle steel sections such as I-beams, channels, and angles without the need to replace the fixture. The overall structure is compact and the positioning is precise, which significantly shortens the changeover time, reduces the complexity of operation, and improves the welding efficiency and stability.

[0024] 2. The movable seat and the telescopic cylinder are used to achieve fine height adjustment. The two sets of clamping mechanisms are arranged in a mirror image on the slide to support bidirectional clamping.

[0025] 3. The deadweight of the steel section presses down the pin, releasing the restrained state of the push spring. The torsion spring drives the support block to flip, automatically adapting to the vertical edges on both sides of the I-beam, channel steel, etc.; the limit block accurately controls the angle to avoid excessive rotation. The structure is simple, the response is fast, and there is no risk of motor overload, which significantly improves versatility, positioning accuracy and welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the planar structure of the clamping mechanism of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the supporting state of the clamping mechanism of the present invention;

[0029] Figure 4 It is a structural schematic diagram of the clamping mechanism of the present invention in a non-supporting state;

[0030] Figure 5 This is a schematic diagram of the support assembly structure of the present invention;

[0031] Figure 6 This is a schematic diagram of the bottom structure of the support assembly of the present invention;

[0032] Figure 7 For the present invention Figure 6 A is an enlarged schematic diagram;

[0033] Figure 8 This is a schematic diagram of the lower structure of the rotating disk of the present invention;

[0034] Figure 9 This is a schematic structural diagram of the pin lower end mechanism of the present invention;

[0035] Figure 10 This is a schematic diagram of the support block of the present invention being supported on the inner side of the steel section;

[0036] Figure 11 This is a schematic diagram of the mirror-image arrangement of the clamping mechanism of the present invention on the slide.

[0037] In the figure: 10, slide; 20, clamping mechanism; 21, clamping seat; 22, clamping jaws; 221, movable jaws; 222, fixed jaws; 2221, guide groove; 23, telescopic cylinder 1; 24, supporting assembly; 241, movable seat; 2411, assembly cavity; 2412, limiting slide groove; 242, assembly cylinder; 243, rotating rod; 244, supporting block; 245, pin rod; 246, rotating component; 2461, rotating disk; 2462, torsion spring; 2463, pushing block 1; 2464, pushing block 2; 2465, limiting block; 2466, pushing spring; 25, telescopic cylinder 2; 30, steel section. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0039] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings.

[0040] Combine Figure 1In the prior art, the welding machine includes a slide module, a welding robot arm and a welding head (not shown in the figure) arranged at the end of the welding robot arm. The slide 10 of the slide module is equipped with a clamp for clamping and fixing the steel section 30. The two slides 10 on the slide module move along the X and Y axes respectively, so that the steel sections 30 fixed by the clamps on the two slides 10 can be pre-jointed and fixed at the preset positions. Subsequently, the welding robot arm controls the welding head to weld the two steel sections 30; however, the type of clamp corresponds to the model of the steel section 30 one by one, which leads to the need for frequent replacement or adjustment when used for welding steel sections 30 of different models, which increases the production preparation time and operation complexity and reduces the welding efficiency. Therefore, the main purpose of the present invention is to improve the versatility and adaptability of the clamp used for steel section welding, reduce the production preparation time and reduce the operation complexity, and further improve the welding efficiency.

[0041] Combine Figures 1-11 The present invention proposes a positioning device for section steel welding, comprising a clamping mechanism 20, the clamping mechanism 20 comprising a clamping seat 21, a pair of clamping jaws 22 provided on the upper side of the clamping seat 21, the pair of clamping jaws 22 comprising a movable jaw 221 and a fixed jaw 222, a telescopic cylinder 23 for horizontally pushing the movable jaw 221 is provided on the inner side of the clamping seat 21, and the movable jaw 221 is pushed horizontally by the telescopic cylinder 23 so that the movable jaw 221 cooperates with the fixed jaw 222 to form a clamping structure. Figure 2 As shown, the clamping jaw 22 is used to clamp a vertical edge of a steel section 30, and the steel section 30 includes a structural steel with an open inner right-angle groove, such as an I-beam, channel steel, angle steel, etc.;

[0042] A support assembly 24 is provided on one side of the clamping seat 21. The support assembly 24 includes a movable seat 241. A rotating rod 243 is provided on the upper side of the movable seat 241. A support block 244 is fixedly connected to the upper end of the rotating rod 243. The support block 244 is used to support the flat portion on the lower side of the section steel 30. The flat portion is adjacent to the edge of the section steel 30 clamped by the clamping jaws 22. In simple terms, the flat portion and one side of the edge form an open inner right-angle structure of the section steel 30.

[0043] A pin 245 is provided on the inner side of the rotating rod 243, and a rotating unit is provided on the lower side of the rotating rod 243. The rotating unit can be an electrically controlled drive structure, such as a motor mechanism, wherein the motor mechanism is controlled by an internal control module to control the rotation angle of the output shaft. The upper end of the pin 245 penetrates and protrudes to the upper surface of the support block 244. When the steel section 30 is placed on the support block 244, the pin 245 is pressed downward, and the downward movement of the pin 245 triggers the rotating unit. The triggering method is preferably to trigger the switch. The rotating unit then drives the rotating rod 243 to rotate, causing the support block 244 to rotate by a preset angle to adapt to the flat portion supported on the lower side of the steel section 30.

[0044] Specifically, when placing the steel section 30, it is first placed on the upper surface of the support block 244. Leveraging its own weight, the steel section 30 presses the pin 245 into the support block 244, which then triggers the rotation unit, driving the rotation rod 243 to rotate to a preset angle before the support block 244 and the flat surface of the steel section 30 come into contact. (If the two come into contact too early, friction will increase the rotational resistance, causing the support block 244 to become stuck.) The support block 244 then supports the flat surface of the steel section 30 at a predetermined angle, and the clamping jaws 22 quickly clamp the edges of the steel section 30. As a result, regardless of the size of the open inner right angle of the steel section 30, the clamping mechanism 20 can achieve single-step clamping and rapid positioning, significantly shortening the changeover preparation time, simplifying operations, and improving welding efficiency.

[0045] Combine Figure 3 — Figure 10 As can be seen, the flat surface widths of different types of steel sections 30 vary, and some, such as I-beams and channel steels, also have vertical edges on both sides of their flat surfaces. These edges can easily block the support block 244 as it rotates within the groove of the steel section 30, forcing the rotating unit to bear abnormal loads, causing damage or even destruction to the internal structure.

[0046] Therefore, this embodiment provides another rotating unit, which includes an assembly cylinder 242 on one side of the movable seat 241, and an assembly cavity 2411 for rotating the assembly rotating rod 243 is opened on the inner side of the assembly cylinder 242. The rotating unit also includes a rotating component 246 assembled on the inner side of the assembly cavity 2411. The rotating component 246 is triggered by the downward-moving pin rod 245 to automatically control the rotation of the rotating rod 243 so that the rotated support block 244 adapts to the flat portion on the lower side of the supporting steel section 30.

[0047] The rotating component 246 includes:

[0048] A rotating disk 2461 is fixedly connected to the lower end of the rotating rod 243, and the rotating disk 2461 is rotatably assembled inside the assembly cavity 2411. A pushing block 2463 is provided at the axial center position of the lower side of the rotating disk 2461. The lower surface of the pushing block 2463 is a spiral surface. A torsion spring 2462 is provided on the upper side of the rotating disk 2461. The elastic potential energy of the torsion spring 2462 drives the rotating component 246, prompting the support block 244 connected to the upper end of the rotating component 246 through the rotating rod 243 to rotate, so that the outer end of the rotating component 246 rotates in the width direction of the section steel 30;

[0049] A second pushing block 2464 is provided at the lower end of the pin 245, and the rotating member 246 movably extends through the interior of the rotating rod 243, the rotating disk 2461, and the first pushing block 2463. The second pushing block 2464 is located below the first helical surface of the first pushing block 2463, and the upper surface of the second pushing block 2464 is a second helical surface that matches the first helical surface.

[0050] A push spring 2466 disposed on the underside of the pin 245 elastically pushes the pin 245 upward, causing the second pushing block 2464 to move upward and slide with the first pushing block 2463 to control the rotation of the rotating disk 2461. The rotation direction of the push spring 2466 is opposite to the direction of rotation of the rotating disk 2461 driven by the torsion spring 2462.

[0051] One side of the pushing block 2464 is fixedly connected to the limiting block 2465, and the inner wall of the assembly cavity 2411 is provided with a limiting groove 2412. The limiting block 2465 is set up and down inside the limiting groove 2412, and the limiting groove 2412 and the limiting block 2465 are limited by the limiting cooperation, so that the pushing block 2464 can only move up and down in the assembly cavity 2411.

[0052] like Figure 4 As shown, under normal conditions, the push spring 2466 elastically pushes the pin rod 245 out, causing it to protrude from the upper surface of the support block 244; the upward pushing block 2464 then engages with the pushing block 1 2463, forcing the rotating disk 2461 to overcome the resistance of the torsion spring 2462, driving the rotating rod 243 to rotate to the initial position where the support block 244 is parallel to the length direction of the steel section 30 (the elastic potential energy of the push spring 2466 is greater than that of the torsion spring 2462, so it can stably maintain this posture).

[0053] When the steel section 30 is placed, its own weight presses down the pin 245, and the push spring 2466 is compressed and retracted; when the second pushing block 2464 moves down with the pin 245 and disengages from the first pushing block 2463, the torsion spring 2462 immediately releases the torque, driving the rotating disk 2461 to rotate. At the same time, the support block 244 automatically turns in the width direction of the steel section 30 until it fits the vertical edges on both sides. Figure 10 As shown, the support block 244 controlled only by the torsion spring 2462 can adapt to the geometric differences of the double-sided edged steel 30 such as I-beam and channel steel.

[0054] Furthermore, by setting the lowering limit height of the second pushing block 2464 so that it forms a mechanical stop with the first pushing block 2463, the maximum rotation angle of the rotating disk 2461 can be precisely limited. When facing a steel section 30 with a vertical edge on only one side, such as an angle steel, the support block 244 can still rotate to this maximum angle, providing reliable support for the flat surface.

[0055] Combine Figure 8 , balls are embedded in the lower side of the rotating disk 2461, and an annular groove is provided on its lower surface to accommodate the rolling of the balls; the cooperation between the balls and the annular groove can significantly reduce the friction resistance of the rotating disk 2461 when it rotates.

[0056] Combine Figure 2 — Figure 5The movable seat 241 is respectively arranged at two sides of the clamping jaw 22 in a clamping mode, and two supporting blocks 244 are symmetrically arranged with the clamping jaw 22 as the center, so that the clamping seat 21 is located at the center of gravity of the two supporting blocks 244, thereby enabling the clamping seat 21 and the supporting assembly 24 to jointly constitute a stable supporting structure

[0057] In combination Figure 2 — Figure 3 The movable seat 241 is slidably sleeved outside the fixed jaw 222, and an extension cylinder 2 is arranged at the bottom of the movable seat 222 to drive the movable seat 241 to vertically ascend and descend. The fixed jaw 222 is provided with a guide groove 2221 at two sides, and a fitting cavity 2411 is correspondingly arranged at the inner side of the movable seat 241, which is embedded in the guide groove 2221 and is in sliding cooperation with the guide groove 2221, so as to ensure that the movable seat 241 always remains stable and does not deviate during the ascending and descending process.

[0058] By operating the extension cylinder 2, the vertical position of the movable seat 241 can be changed, so that the height of the upper surface of the supporting block 244 is synchronously adjusted, and the accurate control of the supporting height of the profile steel 30 is realized. In combination Figure 1 When two profile steels 30 need to be butt welded at different heights, the height of the corresponding supporting block 244 can be independently adjusted through the extension cylinder 2, so as to quickly meet the welding requirement.

[0059] In combination Figure 3 — Figure 4 The front end of the supporting block 244 is processed into a curved surface and is coplanar with the vertical surface of the fixed jaw 222 clamping the profile steel 30, so as to be closely attached to the inner wall of the profile steel 30; and the rear end is provided with a round corner on the rotating direction side. Therefore, when the profile steel 30 has vertical edges on both sides of the planar part, the supporting block 244 can be rotated by a larger angle without interference, which significantly widens the effective supporting width and further improves the supporting stability of the profile steel 30.

[0060] In combination Figure 1 The welding machine table of the present application is composed of a sliding table module, a welding mechanical arm and a welding head arranged at the end of the mechanical arm. The sliding table 10 is provided with at least two clamping mechanisms 20 of the above-mentioned structure along the length direction, so that the whole machine also has all the advantages mentioned above.

[0061] Further, as shown in Figure 11 The sliding table 10 is provided with two groups of clamping mechanisms 20 in the width direction, and the two groups of mechanisms are mirror image reverse installation. When the profile steel 30 needs to be clamped in the width direction, the other group of clamping mechanisms 20 can be directly used to complete the fixation.

[0062] It should be pointed out that if two groups of reverse mechanisms are arranged on the same clamping mechanism 20, the stroke length of the movable jaw 221 should be correspondingly shortened, so that it is smaller than the inner groove width of the profile steel 30 such as I-beam and channel steel, so as to avoid the interference of the movable jaw 221 which does not participate in clamping to the profile steel 30 due to the excessive length.

[0063] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A positioning device for section steel welding, characterized in that: The clamping mechanism (20) includes a clamping seat (21), and a clamping jaw (22) is provided on the upper side of the clamping seat (21). The clamping jaw (22) is used to clamp a vertical edge of the steel section (30); A support assembly (24) is provided on one side of the clamping seat (21), and the support assembly (24) includes a movable seat (241). A rotating rod (243) is provided on the upper side of the movable seat (241). A support block (244) is fixedly connected to the upper end of the rotating rod (243). The support block (244) is used to support the flat surface portion on the lower side of the steel section (30), and the flat surface portion is adjacent to the edge of the steel section (30) clamped by the clamping jaws (22); A pin rod (245) is provided on the inner side of the rotating rod (243), and a rotating unit is provided on the lower side of the rotating rod (243). The upper end of the pin rod (245) penetrates and protrudes to the upper surface of the support block (244). When the steel section (30) is placed on the support block (244), the pin rod (245) is pressed downward, and the downwardly moved pin rod (245) triggers the rotating unit, so that the rotating unit drives the rotating rod (243) to rotate, prompting the rotating support block (244) to adapt to the flat portion of the lower side of the supporting steel section (30); The rotating unit includes an assembly cylinder (242) on one side of the movable seat (241), an assembly cavity (2411) for rotating and assembling the rotating rod (243) is provided inside the assembly cylinder (242), and the rotating unit also includes a rotating component (246) assembled inside the assembly cavity (2411), the rotating component (246) is triggered by the downwardly moved pin rod (245), and automatically controls the rotation of the rotating rod (243), so that the rotated support block (244) is adapted to the flat portion on the lower side of the supporting steel (30); The rotating component (246) includes: A rotating disk (2461) is fixedly connected to the lower end of the rotating rod (243), a pushing block (2463) is provided at the axis center position on the lower side of the rotating disk (2461), and a torsion spring (2462) is provided on the upper side of the rotating disk (2461); A second pushing block (2464) is provided at the lower end of the pin rod (245), and a push spring (2466) is provided on the lower side of the pin rod (245), wherein the second pushing block (2464) and the first pushing block (2463) are slidably matched to control the rotation of the rotating disk (2461); Under normal conditions, the push spring (2466) elastically pushes the pin rod (245) to protrude to the upper surface of the support block (244). At the same time, the pushing block 2 (2464) that moves upward with the pin rod (245) cooperates with the pushing block 1 (2463), so that the rotating disk (2461) overcomes the elasticity of the torsion spring (2462) and drives the rotating rod (243) to rotate, so that the support block (244) is parallel to the length direction of the steel section (30).

2. A positioning device for section steel welding according to claim 1, characterized in that: One side of the second pushing block (2464) is fixedly connected to the limiting block (2465), and the inner wall of the assembly cavity (2411) is provided with a limiting sliding groove (2412), and the limiting block (2465) is slidably arranged up and down inside the limiting sliding groove (2412).

3. A positioning device for section steel welding according to claim 1, characterized in that: A ball bearing is provided on the lower side of the rotating disk (2461), and an annular groove for the ball bearing to move is provided on the lower surface of the rotating disk (2461).

4. The positioning device for section steel welding according to claim 1, characterized in that: The movable seat (241) is provided on each side of the clamping jaw (22), and the two supporting blocks (244) are symmetrically arranged with the clamping jaw (22) as the center.

5. The positioning device for section steel welding according to claim 1, characterized in that: The clamping jaws (22) include a movable jaw (221) and a fixed jaw (222), and a telescopic cylinder (23) for horizontally pushing the movable jaw (221) is provided on the inner side of the clamping seat (21).

6. A positioning device for section steel welding according to claim 5, characterized in that: The movable seat (241) is slidably arranged on the outside of the fixed claw (222), and a telescopic cylinder 2 (25) is arranged on the lower side of the movable seat (241) to push it to move up and down.

7. A positioning device for section steel welding according to claim 6, characterized in that: One end of the support block (244) is provided with an arc surface, capable of closely contacting the surface wall of the section steel (30), and the other end of the support block (244) is provided with a rounded corner.

8. A welding machine for welding steel sections, characterized in that: The invention comprises a slide module, a welding robot arm and a welding head arranged at the end of the welding robot arm, wherein the slide (10) of the slide module is equipped with at least two clamping mechanisms (20) according to any one of the above claims.

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