Assembly type steel structural part welding device and process

Abstract

The invention discloses an assembly type steel structural part welding device and process, and relates to the technical field of steel structural part welding, the welding device comprises a first supporting part and a second supporting part which are oppositely arranged, and positioning parts used for assembling and fixing an end tab and H-shaped steel are symmetrically arranged on the sides, close to each other, of the first supporting part and the second supporting part; the H-shaped steel comprises two groups of wing plates which are symmetrically arranged in parallel and a web plate which is arranged between the two groups of wing plates; the run-on plate is of a T-shaped structure and comprises a set of side plates and a transverse plate perpendicular to the side plates. The first supporting part and the second supporting part are each provided with a rotating part, and the rotating parts are used for driving the H-shaped steel and the run-on plate which are assembled and fixed to rotate. According to the invention, the H-shaped steel and the run-on plate which are assembled and fixed do not need to be manually turned over, the effect of automatically turning over and adjusting the angle of a welding seam can be realized, and the automation degree of welding is further improved.

Description

Technical Field

[0001] This invention relates to the field of steel structure welding technology, and in particular to a prefabricated steel structure welding device and process. Background Technology

[0002] H-beams, as one of the most important load-bearing components in prefabricated steel structures, are typically composed of a rectangular web and two parallel flanges connected by continuous fillet welds. In current automated welding processes for H-beams, to ensure welding quality, especially the arc initiation and termination quality of critical welds, it is common practice to install arc-starting plates (or arc-exiting plates) at the start and end of the weld. The core function of the arc-starting plate is to "transfer" the arc-starting and termination areas, which are prone to defects such as porosity, slag inclusions, and crater cracks due to unstable arcs and uneven heat during welding, from the main H-beam component to this additional plate. These areas are then removed after welding, thus ensuring uniform and complete quality along the entire length of the weld and avoiding stress concentration. However, this process suffers from a significant efficiency bottleneck and operational complexity, as detailed below: First, the web and upper and lower flanges of the H-beam must be precisely aligned, and then clamped and fixed for the first time using a specialized H-beam assembly machine or a series of complex fixtures (such as web alignment clamping devices, flange clamping devices, etc.). The core objective of this step is to ensure that the web and flanges form a 90° angle and have a uniform assembly gap to meet the dimensional accuracy requirements of subsequent welding.

[0003] After the main components are positioned and temporarily fixed (usually by spot welding), it is often necessary to release or partially release the existing clamping, or replace / add another set of dedicated arc-starting plate positioning fixtures, in order to install the arc-starting plate. Operators must manually or with the aid of auxiliary tools align the arc-starting plate with the start and end ends of the weld, ensuring a tight fit with the bevels of the flanges and webs with minimal gaps, before performing a second clamping and fixing. This step requires high operational precision and disrupts the continuous automated workflow. The existing technology has the following drawbacks: The aforementioned two-step clamping process of "first assembling the main body and then fixing the arc-starting plate" results in the production process being fragmented, increasing the time for non-welding auxiliary operations, seriously affecting the production cycle and overall efficiency, which contradicts the industrialized and efficient production goal pursued by prefabricated steel structures.

[0004] Two independent clamping processes inevitably introduce repetitive positioning errors. During the second clamping of the arc-starting plate, slight displacement or the fixture's own precision issues may lead to poor alignment between the arc-starting plate and the main weld bevel, affecting the smooth transition of arc initiation and termination. Even after removing the arc-starting plate, potential quality issues may remain at the end of the main weld. When dealing with the production of H-beams in multiple specifications and small batches, frequent changes and adjustments to the two sets of fixtures further extend production preparation time and reduce the production line's flexibility. Summary of the Invention

[0005] This invention provides a welding device and process for prefabricated steel structural components, which can solve the following problems existing in the prior art: 1) Cumbersome process and low efficiency; 2) Risk of repeated positioning error; 3) Difficult to adapt to flexible production.

[0006] A prefabricated steel structure welding device includes a first support part and a second support part arranged opposite to each other. The first support part and the second support part are symmetrically provided with positioning parts for assembling and fixing the arc-starting plate and the H-beam on their adjacent sides. The H-beam includes two sets of parallel and symmetrically arranged flanges and a web plate arranged between the two sets of flanges; the arc-drawing plate has a T-shaped structure, which includes a set of side plates and a transverse plate arranged perpendicular to the side plates. The first support part and the second support part are respectively provided with a rotating part, which is used to drive the assembled and fixed H-beam and arc-starting plate to rotate.

[0007] Preferably, the positioning part includes a set of transverse clamping parts for positioning the transverse plate and the web plate, and also includes a first vertical clamping part and a second vertical clamping part for positioning the side plate and the wing plate, wherein the first vertical clamping part and the second vertical clamping part are respectively clamped on the side plates on both sides of the transverse plate.

[0008] Preferably, the transverse clamping part includes two sets of transverse clamping plates arranged in parallel and symmetrical arrangement, and also includes a first clamping part, which is used to adjust the distance between the two sets of transverse clamping plates. The first vertical clamping part and the second vertical clamping part each include a first vertical clamping plate and a second vertical clamping plate arranged in parallel and symmetrically; they also each include a second clamping part, which is used to adjust the distance between the first vertical clamping plate and the second vertical clamping plate.

[0009] Preferably, the two sets of transverse clamping plates are slidably arranged on one side of the first baffle. The first baffle has a first sliding groove. The first clamping part includes a first bidirectional screw that is rotatably arranged on the first baffle. The end of the first bidirectional screw is fixedly provided with a first adjusting handle. The first bidirectional screw is symmetrically spirally sleeved with a first nut. The first nuts on both sides are fixedly connected to the transverse clamping plate through the first sliding groove via connecting rods.

[0010] Preferably, the first vertical clamping plate and the second vertical clamping plate are slidably arranged on one side of the second baffle, the second baffle is provided with a second sliding groove, the second clamping part includes a positioning plate, and the first baffle is fixed to one side of the positioning plate by a support plate; The positioning plate is provided with a second bidirectional screw on one side, and a second adjusting handle is fixedly provided at the end of the second bidirectional screw. A second nut is symmetrically spirally sleeved on the second bidirectional screw. A positioning frame is fixedly provided on one side of the second nut on both sides. A positioning rod is fixedly provided on the side of the positioning frame away from the second nut. Two sets of positioning seats are symmetrically slidably sleeved on the positioning rod. The positioning seats on both sides are fixedly connected to the first vertical clamping plate and the second vertical clamping plate of the vertical clamping part on both sides through the second slide groove via connecting rods.

[0011] Preferably, a first bearing plate is vertically fixedly arranged on the first vertical clamping plate, a second bearing plate is vertically fixedly arranged on the second vertical clamping plate, and L-shaped brackets are fixedly arranged on both sides of the positioning plate, and a lifting electric cylinder is fixedly arranged on the L-shaped brackets. The driving end of the lifting electric cylinder is fixedly connected to the L-shaped support fixed on the second vertical clamping plate. The first support plate has a guide groove, and a guide rod that is fixedly connected to the second support plate is slidably embedded in the guide groove.

[0012] Preferably, it also includes a drive plate, on one side of which a third bidirectional screw is rotatably arranged. The end of the third bidirectional screw is fixed to the output end of the first motor fixed to the end of the drive plate. A third nut is screwed on both sides of the third bidirectional screw, and the third nut is fixedly connected to the support plate.

[0013] Preferably, the first support part includes a first support leg, the second support part includes a second support leg, the rotating part includes a second motor fixedly mounted on the second support leg, the output end of the second motor is fixedly connected to a drive plate on one side, and a drive shaft fixedly connected to the drive plate on the other side is rotatably mounted on the first support leg.

[0014] Preferably, a base plate is provided between the first support leg and the second support leg. A fourth bidirectional screw is rotatably arranged at the bottom of the base plate. The end of the fourth bidirectional screw is fixed to the output end of the third motor. Two sets of fourth nuts are symmetrically spirally sleeved on the fourth bidirectional screw. The fourth nuts on both sides are fixedly connected to the first support leg and the second support leg, respectively.

[0015] A welding process for prefabricated steel structural components, applied to the aforementioned welding device for prefabricated steel structural components, includes the following steps: Two sets of arc-starting plates corresponding to the weld seams to be welded are respectively erected and fixed at both ends of the H-beam; After the H-beam and the arc-starting plate are assembled and fixed, the upper weld seam formed by the two is welded by a welding robot; After welding is completed, the H-beam and the arc-starting plate are rotated 180 degrees by the rotating part to weld the initial lower side weld of both.

[0016] This invention provides a welding device and process for prefabricated steel structural components, which has the following beneficial effects: 1) After the H-beam and the arc-starting plate of the present invention are assembled and fixed, the upper weld formed by the two can be welded by a welding robot. After the welding is completed, the H-beam and the arc-starting plate are rotated 180 degrees by the rotating part to weld the initial lower weld. Based on this, the present invention does not require manual flipping of the assembled and fixed H-beam and the arc-starting plate, and can achieve the effect of automatic flipping and adjusting the weld angle, further improving the degree of automation of welding. 2) When assembling and fixing the H-beam and the arc-starting plate, the present invention can clamp and position the web plate and the transverse plate through the transverse clamping part, and clamp and position the side plate and the wing plate through the first vertical clamping part and the second vertical clamping part. Based on the setting of the three sets of clamping parts, the H-beam and the arc-starting plate can be stably positioned. 3) After the wing plate is embedded between the first vertical clamping plate and the second vertical clamping plate, the L-shaped supports on both sides can be driven to move towards each other in the vertical direction by the lifting electric cylinders on both sides. During the movement of the L-shaped supports, the second vertical clamping plate can be driven to move. Based on the setting of the guide rod and guide groove on the first and second bearing plates, the first vertical clamping plate can be driven to move synchronously during the movement of the second vertical clamping plate until the first and second bearing plates on the first and second vertical clamping parts are tightly abutted against the side edge of the wing plate, thus achieving the positioning of the wing plate. Since the transverse clamping part in this embodiment is located in the middle position of the first and second vertical clamping parts, the web plate is also in the middle position of the wing plate at this time as the positioning of the wing plate is completed. The present invention does not require the use of other equipment or measuring tools to adjust the relative position of the web plate on the wing plate, further improving the positioning efficiency and accuracy of the H-beam and the arc-starting plate. Attached Figure Description

[0017] Figure 1 A three-dimensional structural schematic diagram of a prefabricated steel structure welding device provided by the present invention. Figure 1 ; Figure 2This is a schematic diagram of the main structure of a prefabricated steel structure welding device provided by the present invention; Figure 3 A three-dimensional structural schematic diagram of a prefabricated steel structure welding device provided by the present invention. Figure 2 ; Figure 4 This invention provides a schematic diagram of the assembly of H-beams and arc-starting plates in a prefabricated steel structure welding device. Figure 5 This invention provides a schematic diagram of the positioning part in a prefabricated steel structure welding device. Figure 6 A schematic diagram of the structure of each clamping part in a prefabricated steel structure welding device provided by the present invention. Figure 1 ; Figure 7 A schematic diagram of the structure of each clamping part in a prefabricated steel structure welding device provided by the present invention. Figure 2 ; Figure 8 This is a schematic diagram of the bearing plate in a prefabricated steel structure welding device provided by the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. H-beam; 2. First support section; 3. Second support section; 4. Base plate; 5. Arc-starting plate; 6. Positioning section; 7. Lateral clamping section; 8. First vertical clamping section; 101. Wing plate; 102. Web plate; 201. First support leg; 301. Second support leg; 302. Second motor; 401. Fourth double-acting screw; 402. Fourth nut; 403. Third motor; 501. Side plate; 502. Horizontal plate; 601. Drive plate; 602. Third double-acting screw; 603. Third nut; 604. First motor; 605. Support plate; 606. Positioning plate; 607. First baffle; 608. L-shaped bracket ; 609. Lifting electric cylinder; 610. Second bidirectional screw; 611. Second nut; 612. Second adjusting handle; 613. Positioning frame; 614. Positioning rod; 615. Positioning seat; 616. First slide groove; 617. First bidirectional screw; 618. First nut; 619. First adjusting handle; 701. Horizontal clamping plate; 801. Second vertical clamping part; 802. First vertical clamping plate; 803. Second vertical clamping plate; 804. L-shaped support; 805. Second bearing plate; 806. First bearing plate; 807. Second baffle; 808. Second slide groove; 809. Guide rod; 810. Guide groove. Detailed Implementation

[0019] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0020] Example 1

[0021] like Figures 1 to 5 As shown in the figure, an assembly steel structure welding device provided by an embodiment of the present invention includes a first support part 2 and a second support part 3 arranged opposite to each other. The first support part 2 and the second support part 3 are symmetrically arranged on one side close to each other, and positioning parts 6 are used to assemble and fix the arc-starting plate 5 and the H-beam 1. Specifically, in this embodiment, before welding the H-beam 1, two sets of arc-starting plates 5 corresponding to the weld seams to be welded are first assembled and fixed at both ends of the H-beam 1, so that the welding robot can pre-weld along the weld seams of the arc-starting plates 5 during the welding process of the H-beam, so as to ensure the quality of the subsequent welding of the H-beam weld seams.

[0022] In this embodiment, the H-beam 1 includes two sets of parallel and symmetrically arranged flanges 101 and a web 102 arranged between the two sets of flanges 101; wherein, the arc-drawing plate 5 has a T-shaped structure, which includes a set of side plates 501 and a transverse plate 502 arranged perpendicular to the side plates 501. In addition, in this embodiment, the thickness of the side plate 501 of the arc-inducing plate 5 is the same as the thickness of the wing plate 101, and the thickness of the transverse plate 502 is the same as the thickness of the web plate 102. It should be noted that, in this embodiment, when the arc-starting plate 5 is assembled and fixed with the H-beam 1, the side plate 501 of the arc-starting plate 5 is attached to the flange 101, and the transverse plate 502 of the arc-starting plate 5 is attached to the web plate 102, so that the weld formed by the assembly of the transverse plate 502 and the side plate 501 corresponds to the weld formed by the assembly of the web plate 102 and the flange 101, and the welds of the two overlap, which facilitates subsequent arc welding.

[0023] It should also be noted that the first support part 2 and the second support part 3 are respectively provided with rotating parts, which are used to drive the assembled and fixed H-beam 1 and arc-starting plate 5 to rotate. It can be explained that after the H-beam 1 and arc-starting plate 5 are assembled and fixed, the upper weld formed by the two can be welded by a welding robot. After the welding is completed, the H-beam 1 and arc-starting plate 5 are driven to rotate 180 degrees by the rotating part to weld the initial lower weld. Based on this, this embodiment does not require manual flipping of the assembled and fixed H-beam 1 and arc-starting plate 5, and can achieve the effect of automatic flipping and adjusting the weld angle, further improving the automation level of welding.

[0024] Example 2

[0025] Based on Example 1, please refer to Figures 1-2 as well as Figures 4-7The positioning part 6 includes a set of transverse clamping parts 7 for positioning the cross plate 502 and the web plate 102, and also includes a first vertical clamping part 8 and a second vertical clamping part 801 for positioning the side plate 501 and the wing plate 101. The first vertical clamping part 8 and the second vertical clamping part 801 are respectively clamped on the side plates 501 on both sides of the cross plate 502. It can be noted that in this embodiment, when assembling and fixing the H-beam 1 and the arc-starting plate 5, the web plate 102 and the cross plate 502 can be clamped and positioned by the transverse clamping part 7, and the side plate 501 and the wing plate 101 can be clamped and positioned by the first vertical clamping part 8 and the second vertical clamping part 801. Based on the setting of the three sets of clamping parts, the effect of stably positioning the H-beam 1 and the arc-starting plate 5 can be achieved.

[0026] In this embodiment, the transverse clamping part includes two sets of transverse clamping plates 701 arranged in parallel and symmetrical configuration, and also includes a first clamping part, which is used to adjust the distance between the two sets of transverse clamping plates 701. The first vertical clamping part 8 and the second vertical clamping part 801 respectively include a first vertical clamping plate 802 and a second vertical clamping plate 803 arranged in parallel and symmetrical configuration; they also each include a second clamping part, which is used to adjust the distance between the first vertical clamping plate 802 and the second vertical clamping plate 803. It can be noted that, in this embodiment, when the transverse clamping part positions the transverse plate 502 and the web plate 102, it can... After the plate 502 is attached to the web plate 102, it is embedded between two sets of transverse clamping plates 701. Then, the first clamping part drives the two transverse clamping plates 701 to move closer to each other, so as to achieve the effect of clamping and positioning the transverse plate 502 and the web plate 102. Correspondingly, in this embodiment, when positioning the side plate 501 and the wing plate 101, the side plate 501 and the wing plate 101 can be attached to each other and embedded between the first vertical clamping plate 802 and the second vertical clamping plate 803. Then, the second clamping part drives the first vertical clamping plate 802 and the second vertical clamping plate 803 to move closer to each other, so as to achieve the effect of clamping and positioning the side plate 501 and the wing plate 101.

[0027] Specifically, two sets of transverse clamping plates 701 are slidably arranged on one side of the first baffle 607. The first baffle 607 is provided with a first sliding groove 616. The first clamping part includes a first bidirectional screw 617 rotatably arranged on the first baffle 607. A first adjusting handle 619 is fixedly arranged at the end of the first bidirectional screw 617. The first nuts 618 are symmetrically spirally sleeved on the first bidirectional screw 617. The first nuts 618 on both sides are fixedly connected to the transverse clamping plates 701 through the first sliding groove 616 via connecting rods. It can be noted that in this embodiment, when adjusting the distance between the two transverse clamping plates 701, the first bidirectional screw 617 can be rotated by adjusting the first adjusting handle 619. During the movement of the first nuts 618 on the first bidirectional screw 617, the two transverse clamping plates 701 can be adjusted to move closer to each other or further away from each other.

[0028] In one embodiment of this invention, the first vertical clamping plate 802 and the second vertical clamping plate 803 are slidably arranged on one side of the second baffle 807. The second baffle 807 has a second sliding groove 808. The second clamping part includes a positioning plate 606. The first baffle 607 is fixed to one side of the positioning plate 606 by a support plate 605. A second bidirectional screw 610 is rotatably arranged on one side of the positioning plate 606. A second adjusting handle 612 is fixedly arranged at the end of the second bidirectional screw 610. A second nut 611 is symmetrically spirally sleeved on the second bidirectional screw 610. A positioning frame 613 is fixedly arranged on one side of each of the two second nuts 611. A positioning rod 614 is fixedly arranged on the side of the positioning frame 613 away from the second nut 611. Two sets of positioning seats 614 are symmetrically slidably sleeved on the positioning rod 614. 15. The two side positioning seats 615 are respectively fixedly connected to the first vertical clamping plate 802 and the second vertical clamping plate 803 of the two side vertical clamping parts through the second slide groove 808 via connecting rods. It can be noted that in this embodiment, when adjusting the distance between the first vertical clamping plate 802 and the second vertical clamping plate 803, the second bidirectional screw 610 can be driven to rotate by the second adjusting handle 612. During the movement of the two side second nuts 611 on the second bidirectional screw 610, the two side positioning frames 613 can be synchronously driven to move closer or further away from each other. The positioning frame 613 can adjust the first vertical clamping plate 802 and the second vertical clamping plate 803 to move closer or further away from each other through the positioning rod 614 and the positioning seat 615, so as to achieve the effect of clamping and positioning the side plate 501 and the wing plate 101. Accordingly, in this embodiment, each vertical clamping plate is slidably mounted on the positioning rod 614 via the positioning seat 615. The effect of synchronously adjusting the movement of the vertical clamping plates can be achieved by adjusting the position of the positioning rod 614.

[0029] In this embodiment, along the direction of the weld, the lengths of the transverse clamping plate 701 and each vertical clamping plate are greater than the lengths of the side plate 501 and the transverse plate 502. Based on this, during the positioning of the arc-starting plate 5, as the transverse plate 502 is embedded between the two transverse clamping plates 701 and fits against the first baffle 607, there is a gap at the end of the transverse clamping plate 701 that can be used to embed the web plate 102. Correspondingly, when the side plate 501 is embedded in the first vertical clamping part 8 and the second vertical clamping part 801 and fits against the second baffle 807, there is a gap at the end of the first vertical clamping part 8 and the second vertical clamping part 801 that can be used to embed the wing plate 101. Thus, in this embodiment, the clamping and positioning effect of the H-beam 1 can be achieved simultaneously during the clamping and positioning of the arc-starting plate 5.

[0030] Please refer to Figures 4-8To ensure that the web plate 102 is assembled to the center position of the two side wing plates 101, in this embodiment, a first bearing plate 806 is vertically fixedly arranged on the first vertical clamping plate 802, and a second bearing plate 805 is vertically fixedly arranged on the second vertical clamping plate 803. L-shaped brackets 608 are fixedly arranged on both sides of the positioning plate 606, and lifting cylinders 609 are fixedly arranged on the L-shaped brackets 608. The driving end of the lifting cylinder 609 is fixedly connected to the L-shaped support 804 fixed on the second vertical clamping plate 803. A guide groove 810 is formed on the first bearing plate 806, and a guide rod 809 fixedly connected to the second bearing plate 805 is slidably embedded in the guide groove 810. It can be noted that in this embodiment, after the wing plate 101 is embedded between the first vertical clamping plate 802 and the second vertical clamping plate 803, the two L-shaped supports 804 can be driven to move towards each other vertically by the lifting cylinders 609 on both sides. During the movement, the second vertical clamping plate 803 can be driven to move. Based on the setting of the guide rod 809 and guide groove 810 on the first bearing plate 806 and the second bearing plate 805, the first vertical clamping plate 802 can be driven to move synchronously during the movement of the second vertical clamping plate 803. When the first bearing plate 806 and the second bearing plate 805 on the first vertical clamping part 8 and the second vertical clamping part 801 are in close contact with the side edge of the wing plate 101, the wing plate 101 can be positioned. Since the lateral clamping part 7 of this embodiment is located in the middle position of the first vertical clamping part 8 and the second vertical clamping part 801, the web plate 102 is also in the middle position of the wing plate 101 as the positioning of the wing plate 101 is completed. This embodiment does not need to use other equipment or measuring tools to adjust the relative position of the web plate 102 on the wing plate 101, which further improves the positioning efficiency and accuracy of the H-beam 1 and the arc-starting plate 5. To further expand the applicability of the device for web plates 102 of different widths, a drive plate 601 is also included. A third bidirectional screw 602 is rotatably arranged on one side of the drive plate 601. The end of the third bidirectional screw 602 is fixed to the output end of the first motor 604 fixed to the end of the drive plate 601. A third nut 603 is screwed on both sides of the third bidirectional screw 602, and the third nut 603 is fixedly connected to the support plate 605. Specifically, in this embodiment, the third bidirectional screw 602 is driven to rotate by the first motor 604. During the movement of the third nut 603 on the third bidirectional screw 602, the positioning plates 606 on both sides can be adjusted to move closer or further apart, thereby adjusting the distance between the first vertical clamping part 8 and the second vertical clamping part 801 on both sides. On the one hand, this allows the clamped and positioned wing plate 101 to fit closely with the web plate 102. On the other hand, it can be applied to positioning web plates 102 of different widths, thus broadening the application range.

[0031] In addition, you can refer to Figures 1-6The first support part 2 includes a first support leg 201, the second support part 3 includes a second support leg 301, and the rotating part includes a second motor 302 fixedly arranged on the second support leg 301. The output end of the second motor 302 is fixedly connected to a drive plate 601 on one side, and a drive shaft fixedly connected to the drive plate 601 on the other side is rotatably arranged on the first support leg 201. It can be noted that in this embodiment, when adjusting the weld between the H-beam 1 and the arc-starting plate 5, the second motor 302 can be started. The second motor 302 can drive the H-beam 1 and the arc-starting plate 5 to rotate, so as to adjust the weld angle of the H-beam 1 and facilitate welding.

[0032] To accommodate welding H-beams 1 of different lengths, a base plate 4 is provided between the first support leg 201 and the second support leg 301. A fourth bidirectional screw 401 is rotatably mounted on the bottom of the base plate 4. The end of the fourth bidirectional screw 401 is fixed to the output end of the third motor 403. Two sets of fourth nuts 402 are symmetrically spirally sleeved on the fourth bidirectional screw 401. The fourth nuts 402 on both sides are fixedly connected to the first support leg 201 and the second support leg 301, respectively. It can be noted that in this embodiment, the fourth bidirectional screw 401 can be driven to rotate by the third motor 403. During the movement of the fourth nuts 402 on the fourth bidirectional screw 401, the distance between the first support leg 201 and the second support leg 301 can be adjusted, thereby achieving the positioning of H-beams 1 of different lengths.

[0033] A welding process for prefabricated steel structural components includes the following steps: Please refer to Figures 1-5 S1. At both ends of the H-beam 1, two sets of arc-starting plates 5 corresponding to the weld seams to be welded are respectively erected and fixed. After S2, H-beam 1 and arc-starting plate 5 are assembled and fixed, the upper weld seam formed by the two is welded by a welding robot; S3. After welding is completed, the H-beam 1 and the arc-starting plate 5 are rotated 180 degrees by the rotating part to weld the initial lower side weld of the two.

[0034] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A prefabricated steel structure welding device, comprising a first support part (2) and a second support part (3) arranged opposite to each other, characterized in that, The first support part (2) and the second support part (3) are symmetrically arranged with positioning parts (6) for assembling and fixing the arc-starting plate (5) and the H-beam (1). The H-beam (1) includes two sets of parallel and symmetrically arranged flanges (101) and a web (102) arranged between the two sets of flanges (101); the arc-drawing plate (5) has a T-shaped structure, which includes a set of side plates (501) and a transverse plate (502) arranged perpendicular to the side plates (501). Among them, the first support part (2) and the second support part (3) are respectively provided with a rotating part, which is used to drive the H-beam (1) and the arc-starting plate (5) that are assembled and fixed to rotate.

2. The prefabricated steel structure welding device as described in claim 1, characterized in that, The positioning part (6) includes a set of transverse clamping parts (7) for positioning the transverse plate (502) and the web plate (102), and also includes a first vertical clamping part (8) and a second vertical clamping part (801) for positioning the side plate (501) and the wing plate (101). The first vertical clamping part (8) and the second vertical clamping part (801) are respectively clamped on the side plates (501) on both sides of the transverse plate (502).

3. The prefabricated steel structure welding device as described in claim 2, characterized in that, The transverse clamping part includes two sets of transverse clamping plates (701) arranged in parallel and symmetrical arrangement, and also includes a first clamping part, which is used to adjust the distance between the two sets of transverse clamping plates (701). The first vertical clamping part (8) and the second vertical clamping part (801) respectively include a first vertical clamping plate (802) and a second vertical clamping plate (803) arranged in parallel and symmetrical manner; and each also includes a second clamping part, which is used to adjust the distance between the first vertical clamping plate (802) and the second vertical clamping plate (803).

4. The prefabricated steel structure welding device as described in claim 3, characterized in that, The two sets of transverse clamping plates (701) are slidably arranged on one side of the first baffle (607). The first baffle (607) is provided with a first sliding groove (616). The first clamping part includes a first bidirectional screw (617) rotatably arranged on the first baffle (607). The end of the first bidirectional screw (617) is fixedly provided with a first adjusting handle (619). The first bidirectional screw (617) is symmetrically spirally sleeved with a first nut (618). The first nuts (618) on both sides are fixedly connected to the transverse clamping plate (701) through the first sliding groove (616) via connecting rods.

5. The prefabricated steel structure welding device as described in claim 4, characterized in that, The first vertical clamping plate (802) and the second vertical clamping plate (803) are slidably arranged on one side of the second baffle (807). The second baffle (807) has a second sliding groove (808). The second clamping part includes a positioning plate (606). The first baffle (607) is fixed to one side of the positioning plate (606) by a support plate (605). The positioning plate (606) is provided with a second bidirectional screw (610) on one side, and a second adjusting handle (612) is fixedly provided at the end of the second bidirectional screw (610). The second nut (611) is symmetrically spirally sleeved on the second bidirectional screw (610). A positioning frame (613) is fixedly provided on one side of the second nut (611) on both sides. A positioning rod (614) is fixedly provided on the side of the positioning frame (613) away from the second nut (611). Two sets of positioning seats (615) are symmetrically slidably sleeved on the positioning rod (614). The positioning seats (615) on both sides are fixedly connected to the first vertical clamping plate (802) and the second vertical clamping plate (803) of the vertical clamping part on both sides through the second slide groove (808) via connecting rods.

6. The prefabricated steel structure welding device as described in claim 5, characterized in that, A first bearing plate (806) is vertically fixed on the first vertical clamping plate (802), and a second bearing plate (805) is vertically fixed on the second vertical clamping plate (803). L-shaped brackets (608) are fixedly arranged on both sides of the positioning plate (606). A lifting electric cylinder (609) is fixedly arranged on the L-shaped bracket (608). The driving end of the lifting electric cylinder (609) is fixedly connected to the L-shaped support (804) fixed on the second vertical clamping plate (803). The first support plate (806) has a guide groove (810) and a guide rod (809) that is fixedly connected to the second support plate (805) is slidably embedded in the guide groove (810).

7. The prefabricated steel structure welding device as described in claim 6, characterized in that, It also includes a drive plate (601), a third bidirectional screw (602) is rotatably arranged on one side of the drive plate (601), the end of the third bidirectional screw (602) is fixed to the output end of the first motor (604) fixed to the end of the drive plate (601), and a third nut (603) is screwed on both sides of the third bidirectional screw (602), and the third nut (603) is fixedly connected to the support plate (605).

8. The prefabricated steel structure welding device as described in claim 7, characterized in that, The first support part (2) includes a first support leg (201), the second support part (3) includes a second support leg (301), and the rotating part includes a second motor (302) fixedly arranged on the second support leg (301). The output end of the second motor (302) is fixedly connected to a drive plate (601) on one side, and a drive shaft fixedly connected to the drive plate (601) on the other side is rotatably arranged on the first support leg (201).

9. The prefabricated steel structure welding device as described in claim 8, characterized in that, A base plate (4) is provided between the first support leg (201) and the second support leg (301). A fourth bidirectional screw (401) is rotatably arranged at the bottom of the base plate (4). The end of the fourth bidirectional screw (401) is fixed to the output end of the third motor (403). Two sets of fourth nuts (402) are symmetrically spirally sleeved on the fourth bidirectional screw (401). The fourth nuts (402) on both sides are fixedly connected to the first support leg (201) and the second support leg (301) respectively.

10. A welding process for prefabricated steel structural components, characterized in that, An assembly steel structure welding device as described in any one of claims 1-9 includes the following steps: Two sets of arc-starting plates (5) corresponding to the weld seam to be welded are respectively erected and fixed at both ends of the H-beam (1); After the H-beam (1) and the arc-starting plate (5) are assembled and fixed, the upper weld seam formed by the two is welded by a welding robot; After welding is completed, the H-beam (1) and the arc-starting plate (5) are rotated 180 degrees by the rotating part to weld the initial lower side weld of both.

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