Steel pipe welding auxiliary device for steel furniture production

Abstract

The invention belongs to the technical field of steel pipe machining, and particularly relates to a steel pipe welding auxiliary device for steel furniture production, which comprises a bottom plate, a group of brackets are fixed at the top of the bottom plate, a group of supporting plates are fixed at the top end of each bracket, a fixing mechanism is arranged on the outer side of each bracket, and each fixing mechanism comprises a mounting ring; two discs are fixed in the mounting ring, an air bag is fixed between the two discs, a plurality of supporting rods are fixed to the circumferential outer wall of the air bag, a plurality of guide rails are further mounted on the circumferential outer wall of the mounting ring, the supporting rods penetrate through the guide rails and are in sliding connection with the guide rails, and the air bag is connected with an inflation assembly. According to the steel pipe butt joint device, by arranging the support with the supporting plate, the mounting ring, the air bag, the supporting rod and other structures, steel pipes can be rapidly placed on the supporting plate, the air bag is expanded through the inflation assembly, the supporting rod is pushed to abut against the inner walls of the steel pipes, fixing of the steel pipes is achieved, meanwhile, the two steel pipes can be rapidly in butt joint through the fixing mechanism, and the preparation efficiency before welding is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel pipe processing, and particularly relates to a steel pipe welding auxiliary device for the production of steel furniture. Background Art

[0002] In the production process of steel furniture, steel pipe welding is a crucial link. In traditional steel pipe welding operations, manual support of the steel pipe for positioning and butt-joint is usually relied on. This method not only has high requirements for the technical level and physical strength of workers, but also is difficult to ensure the accuracy and consistency of the welding position, resulting in uneven welding quality. At the same time, during manual operation, it is difficult to achieve uniform rotation of the steel pipe, which will cause uneven welds during the welding process, affecting the aesthetics and structural strength of the product. These problems not only increase production costs, but also limit the high-quality development of the steel furniture industry. Therefore, corresponding improvements are made to address this problem. Summary of the Invention

[0003] Based on the technical problems existing in the prior art, the present invention proposes a steel pipe welding auxiliary device for the production of steel furniture.

[0004] A steel pipe welding auxiliary device for the production of steel furniture proposed by the present invention includes a bottom plate. A set of brackets is fixed on the top of the bottom plate. The top end of each bracket is fixed with a set of trays for placing steel pipes. A fixing mechanism for fixing the steel pipe, which can move horizontally and rotate, is arranged on the outside of each bracket. The fixing mechanism includes an installation ring. Two discs are fixed inside the installation ring. An airbag is fixed between the two discs. A plurality of T-shaped struts distributed in a circular array are fixed on the circumferential outer wall of the airbag. A plurality of guide rails distributed in a circular array are also installed on the circumferential outer wall of the installation ring. The struts pass through the guide rails and form a sliding connection with the guide rails. The airbag is connected with an inflation assembly; the two steel pipes to be welded together are respectively placed on the corresponding set of trays, then the two fixing mechanisms approach each other and respectively extend into the corresponding steel pipes. Then, the airbag is inflated through the inflation assembly. After the airbag expands, it will push a plurality of struts outwards simultaneously. Then, the free ends of the struts will abut against the inner wall of the steel pipe, thereby realizing the fixation with the steel pipe. Then, the two steel pipes are driven by the two fixing mechanisms to approach each other until the ends of the two steel pipes are butted together, ready for welding. During welding, the two steel pipes are driven by the fixing mechanism to rotate together, so that the staff can control the welding equipment to weld at the connection part of the two steel pipes.

[0005] Preferably, the inflation assembly includes an air pump. The air pump is fixed on the circumferential outer wall of the installation ring. The air outlet end of the air pump is connected with a hose, and the other end of the hose is connected with the air inlet pipe on the airbag; inflation is carried out through the air pump, and the gas will enter the airbag from the hose, thereby inflating the airbag.

[0006] Preferably, a set of L-shaped sliding plates capable of lateral movement are arranged above the bottom plate. The fixing mechanisms are respectively located at the ends of the sliding plates. Rack bars are respectively fixed on the opposite sides of the two sliding plates. A first motor is also fixed on the top of the bottom plate. The output shaft of the first motor is fixedly connected with a gear, and the gear is meshed and connected between the two rack bars. By driving the gear to rotate through the output shaft of the first motor, and the gear meshes with the two rack bars, the two sliding plates can be driven to move closer to or away from each other simultaneously, so that the two fixing mechanisms can be driven to perform corresponding lateral movement.

[0007] Preferably, a set of support seats are fixed on the top of the bottom plate, and the two support seats are respectively slidably connected with the corresponding sliding plates. The sliding plates can be limited to move horizontally through the support seats.

[0008] Preferably, a second motor is fixed at the top end of the sliding plate, and the output shaft of the second motor is fixedly connected with a disc. By driving the fixing mechanism to rotate through the output shaft of the second motor, the fixing mechanism can be used to drive the steel pipe to rotate.

[0009] Preferably, it further includes a pressure acquisition module, a displacement acquisition module and a control module. The pressure acquisition module is used to detect the internal pressure of the airbag in real time, and the displacement acquisition module is used to detect the radial displacement of the support rod in real time. The control module receives the data collected by the pressure acquisition module and the displacement acquisition module in real time, conducts comprehensive analysis, and then generates an evaluation coefficient. By comparing the evaluation coefficient with a preset evaluation coefficient reference threshold, it is judged when to stop inflating the airbag, and the working state of the air pump is controlled according to the comparison result, so as to intelligently control the inflation process of the airbag.

[0010] Preferably, the pressure acquisition module is fixedly connected inside the inflation pipeline of the airbag, the displacement acquisition module is fixedly connected at the end of the guide rail, and the control module is fixedly connected inside the mounting ring. The internal pressure of the airbag can be better detected in real time through the pressure acquisition module, and the radial displacement of the support rod can be better detected in real time through the displacement acquisition module.

[0011] Preferably, the input end and the output end of the pressure acquisition module are respectively electrically connected with the output end and the input end of the control module, the input end and the output end of the displacement acquisition module are respectively electrically connected with the output end and the input end of the control module, and the output end of the control module is electrically connected with the input end of the air pump.

[0012] Preferably, the control logic of the control module for the working state of the air pump is as follows:

[0013] Stage 1: Rapid inflation:

[0014] When the airbag is inflated until the support rod contacts the inner wall of the steel pipe S≥S min , the displacement threshold is triggered;

[0015] Stage 2 Voltage Stabilization Adjustment:

[0016] Monitor the rate of change of pressure When the rate approaches zero it is determined that the contact is stable;

[0017] Stage 3 Safety Verification:

[0018] Calculate K, if K ≥ K crit Critical evaluation coefficient, stop inflating.

[0019] Preferably, the calculation formula of the evaluation coefficient K is:

[0020]

[0021] In the formula, P: real-time pressure of the airbag, S: real-time displacement of the support rod, Rate of change of pressure, α, β: weight coefficients.

[0022] Compared with the prior art, the present invention provides a steel furniture production steel pipe welding auxiliary device, which has the following beneficial effects:

[0023] 1. A steel furniture production steel pipe welding auxiliary device. By setting structures such as a bracket with a tray, a mounting ring, an airbag and a support rod, the steel pipe can be quickly placed on the tray, and the airbag is inflated through the inflation component to push the support rod to abut against the inner wall of the steel pipe, realizing the fixation of the steel pipe. At the same time, by using the cooperation of the first motor, the gear and the rack, the two fixing mechanisms can drive the steel pipe to be quickly butted, greatly improving the preparation efficiency before welding.

[0024] 2. A steel furniture production steel pipe welding auxiliary device. During the welding process, the second motor can drive the fixing mechanism and the steel pipe to rotate together, ensuring uniform weld seams during the welding process, significantly improving the welding quality, reducing product defects caused by uneven weld seams, and improving the aesthetics and structural strength of the product.

[0025] 3. A steel furniture production steel pipe welding auxiliary device. The collaborative work of the pressure acquisition module, the displacement acquisition module and the control module realizes the intelligent control of the airbag inflation process. By real-time monitoring the internal pressure of the airbag, the radial displacement of the support rod and the rate of change of pressure, an evaluation coefficient is generated and compared with the preset threshold to accurately control the working state of the air pump, which can not only ensure the firm fixation of the steel pipe, but also avoid the deformation of the steel pipe caused by over-inflation, improving the stability and reliability of the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is the overall structural schematic diagram of a steel furniture production steel pipe welding auxiliary device proposed by the present invention;

[0027] Figure 2 Partial schematic diagram of a steel pipe welding auxiliary device for steel furniture production proposed by the present invention;

[0028] Figure 3 Schematic structural diagram of the fixing mechanism of a steel pipe welding auxiliary device for steel furniture production proposed by the present invention;

[0029] Figure 4 Schematic diagram of the airbag structure of a steel pipe welding auxiliary device for steel furniture production proposed by the present invention;

[0030] Figure 5 For the present invention Figure 4 Enlarged structural diagram at position A;

[0031] Figure 6 For the present invention Figure 3 Enlarged structural diagram at position B;

[0032] Figure 7 For the present invention Figure 2 Enlarged structural diagram at position C;

[0033] Figure 8 Schematic diagram of the principle of a steel pipe welding auxiliary device for steel furniture production proposed by the present invention.

[0034] In the figure: 1, bottom plate; 2, bracket; 3, support plate; 4, mounting ring; 5, disc; 6, airbag; 7, strut; 8, air pump; 9, hose; 10, intake pipe; 11, guide rail; 12, sliding plate; 13, first motor; 14, gear; 15, rack; 16, support seat; 17, second motor; 18, pressure acquisition module; 19, displacement acquisition module; 20, control module. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0037] Refer to Figures 1-8, A steel pipe welding auxiliary device for steel furniture production, including a bottom plate 1. A group of brackets 2 are fixed on the top of the bottom plate 1. The top of each bracket 2 is fixed with a group of pallets 3 for placing steel pipes. A fixing mechanism for fixing steel pipes, which can move horizontally and rotate, is arranged on the outside of each bracket 2. The fixing mechanism includes an installation ring 4. Two discs 5 are fixed inside the installation ring 4. An airbag 6 is fixed between the two discs 5. A plurality of T-shaped struts 7 distributed in a circular array are fixed on the circumferential outer wall of the airbag 6. A plurality of guide rails 11 distributed in a circular array are also installed on the circumferential outer wall of the installation ring 4. The struts 7 pass through the guide rails 11 and form a sliding connection with the guide rails 11. The airbag 6 is connected with an inflation assembly;

[0038] During use, two steel pipes to be welded together are respectively placed on the corresponding group of pallets 3. Then, the two fixing mechanisms approach each other and respectively extend into the corresponding steel pipes. Next, the airbag 6 is inflated through the inflation assembly. After the airbag 6 expands, it will push a plurality of struts 7 outwards simultaneously. Then, the free ends of the struts 7 will abut against the inner wall of the steel pipe, thereby realizing the fixation with the steel pipe. Then, the two steel pipes are driven by the two fixing mechanisms to approach each other until the ends of the two steel pipes are butted together for welding preparation. During welding, the two steel pipes are driven to rotate together by the fixing mechanism, so that the staff can operate the welding equipment to weld at the connection part of the two steel pipes.

[0039] Among them, the inflation assembly includes an air pump 8. The air pump 8 is fixed on the circumferential outer wall of the installation ring 4. The air outlet end of the air pump 8 is connected with a hose 9. The other end of the hose 9 is connected with an air inlet pipe 10 on the airbag 6;

[0040] During use, inflation is carried out through the air pump 8, and the gas will enter the airbag 6 from the hose 9, thereby inflating the airbag 6.

[0041] Among them, a group of L-shaped sliding plates 12 that can move horizontally are arranged above the bottom plate 1. The fixing mechanisms are respectively located at the ends of the sliding plates 12. Rack bars 15 are respectively fixed on the opposite sides of the two sliding plates 12. A first motor 13 is also fixed on the top of the bottom plate 1. The output shaft of the first motor 13 is fixedly connected with a gear 14. The gear 14 is meshed and connected between the two rack bars 15;

[0042] During use, the output shaft of the first motor 13 drives the gear 14 to rotate. The gear 14 meshes with the two rack bars 15, thereby driving the two sliding plates 12 to move closer to or away from each other simultaneously, so that the two fixing mechanisms can be driven to perform corresponding horizontal movements.

[0043] Among them, a group of support seats 16 are fixed on the top of the bottom plate 1. The two support seats 16 are respectively slidably connected with the corresponding sliding plates 12;

[0044] During use, the sliding plate 12 can be horizontally limited and moved by the support base 16.

[0045] Among them, a second motor 17 is fixed to the top end of the sliding plate 12, and the output shaft of the second motor 17 is fixedly connected to the disc 5.

[0046] During use, the output shaft of the second motor 17 drives the fixing mechanism to rotate, so that the fixing mechanism can drive the steel pipe to rotate.

[0047] In another embodiment, it further includes a pressure acquisition module 18, a displacement acquisition module 19, and a control module 20. The pressure acquisition module 18 is used to detect the internal pressure of the airbag 6 in real time, and the displacement acquisition module 19 is used to detect the radial displacement of the support rod 7 in real time.

[0048] It should be noted that the pressure acquisition module 18 can be a pressure sensor or other devices capable of detecting the internal pressure of the airbag 6 in real time. The displacement acquisition module 19 can be a displacement sensor or other devices capable of detecting the radial displacement of the support rod 7 in real time. The control module 20 is an embedded controller (such as the STM32 series) integrated with a data fusion algorithm. Therefore, the pressure acquisition module 18, the displacement acquisition module 19, and the control module 20 are not specifically limited here and can be selected according to actual needs.

[0049] During use, the control module 20 receives the data collected by the pressure acquisition module 18 and the displacement acquisition module 19 in real time, performs comprehensive analysis, and then generates an evaluation coefficient. By comparing the evaluation coefficient with a pre-set evaluation coefficient reference threshold, it is judged when to stop inflating the airbag 6, and the working state of the air pump 8 is controlled according to the comparison result, so as to intelligently control the inflation process of the airbag 6.

[0050] Among them, the pressure acquisition module 18 is fixedly connected inside the inflation pipeline of the airbag 6, the displacement acquisition module 19 is fixedly connected to the end of the guide rail 11, and the control module 20 is fixedly connected inside the mounting ring 4.

[0051] During use, the internal pressure of the airbag 6 can be better detected in real time by the pressure acquisition module 18, and the radial displacement of the support rod 7 can be better detected in real time by the displacement acquisition module 19.

[0052] Among them, the input end and output end of the pressure acquisition module 18 are electrically connected to the output end and input end of the control module 20 respectively, the input end and output end of the displacement acquisition module 19 are electrically connected to the output end and input end of the control module 20 respectively, and the output end of the control module 20 is electrically connected to the input end of the air pump 8.

[0053] Through the cooperation among the pressure acquisition module 18, the displacement acquisition module 19, the control module 20 and the air pump 8, the control logic for intelligently controlling the inflation process of the airbag 6 is specifically as follows:

[0054] Stage 1 (rapid inflation):

[0055] The airbag 6 is inflated until the strut contacts the inner wall of the steel pipe (S≥S min ), triggering the displacement threshold;

[0056] Stage 2 (stable pressure adjustment):

[0057] Monitor the rate of change of pressure When the rate approaches zero it is determined that the contact is stable;

[0058] Stage 3 (safety verification):

[0059] Calculate K. If K≥K crit (critical evaluation coefficient), stop inflation.

[0060] Among them, the evaluation coefficient formula:

[0061]

[0062] In the formula, P: the real-time pressure of the airbag 6 (unit: MPa), S: the real-time displacement of the strut 7 (unit: mm), the rate of change of pressure (unit: MPa / s), α, β: weight coefficients (to be calibrated by experiments).

[0063] Among them, the relationship between the pressure and the thrust of the strut 7 is: F = P·A eff (unit: N),

[0064] In the formula, A eff : the effective acting area of the airbag 6 (determined by the layout and geometric shape of the strut 7).

[0065] The relationship between the displacement and the inner diameter of the steel pipe is:

[0066] (unit: mm)

[0067] In the formula, D pipe : the inner diameter of the steel pipe, D fixture : the initial outer diameter of the fixing mechanism.

[0068] It should be understood that in various embodiments of the present application, the magnitudes of the sequence numbers of the above processes do not mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0069] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0070] In several embodiments provided by this application, it should be understood that the disclosed overall system, device, and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another overall system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces, and the indirect couplings or communication connections of the devices or units can be in electrical, mechanical, or other forms.

[0071] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place, or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0072] In addition, the functional units in each embodiment of this application can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit.

[0073] As described above, this is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed by this application can easily think of changes or substitutions, which should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. A steel pipe welding auxiliary device for steel furniture production, comprising a bottom plate (1), characterized in that: A group of brackets (2) are fixed on the top of the base plate (1), a group of support plates (3) for placing steel pipes are fixed on the top of each bracket (2), and a fixing mechanism for fixing the steel pipe that can move laterally and rotate is arranged on the outside of each bracket (2), the fixing mechanism comprising a mounting ring (4), two discs (5) are fixed inside the mounting ring (4), an air bag (6) is fixed between the two discs (5), a plurality of T-shaped support rods (7) distributed in an annular array are fixed on the circumferential outer wall of the air bag (6), a plurality of guide rails (11) distributed in an annular array are also installed on the circumferential outer wall of the mounting ring (4), the support rods (7) pass through the guide rails (11) and form a sliding connection with the guide rails (11), and the air bag (6) is connected to an inflation component.

2. The steel pipe welding auxiliary device for steel furniture production according to claim 1 is characterized in that: The inflation assembly comprises an inflation pump (8), which is fixed on the circumferential outer wall of the mounting ring (4), the outlet end of the inflation pump (8) is connected to a hose (9), and the other end of the hose (9) is connected to an air inlet pipe (10) on the airbag (6).

3. The steel pipe welding auxiliary device for steel furniture production according to claim 1 is characterized in that: A group of L-shaped slide plates (12) capable of transverse movement are arranged above the base plate (1), the fixing mechanisms are respectively located at the ends of the slide plates (12), and racks (15) are respectively fixed on opposite sides of the two slide plates (12). A first motor (13) is also fixed on the top of the base plate (1), and the output shaft of the first motor (13) is fixedly connected to a gear (14), and the gear (14) is meshedly connected between the two racks (15).

4. The steel pipe welding auxiliary device for steel furniture production according to claim 3 is characterized in that: A group of support seats (16) are fixed on the top of the base plate (1), and two support seats (16) are respectively slidably connected to corresponding slide plates (12).

5. The steel pipe welding auxiliary device for steel furniture production according to claim 3 is characterized in that: A second motor (17) is fixed to the top end of the slide plate (12), and an output shaft of the second motor (17) is fixedly connected to the disc (5).

6. The steel pipe welding auxiliary device for steel furniture production according to claim 1 is characterized in that: The invention also comprises a pressure acquisition module (18), a displacement acquisition module (19) and a control module (20), wherein the pressure acquisition module (18) is used to detect the internal pressure of the airbag (6) in real time, and the displacement acquisition module (19) is used to detect the radial displacement of the strut (7) in real time, and the control module (20) receives the data collected by the pressure acquisition module (18) and the displacement acquisition module (19) and generates an evaluation coefficient, compares it with a preset reference threshold value, and controls the working state of the inflation pump (8) according to the comparison result.

7. The steel pipe welding auxiliary device for steel furniture production according to claim 6 is characterized in that: The pressure acquisition module (18) is fixedly connected to the inflation pipe of the airbag (6), the displacement acquisition module (19) is fixedly connected to the end of the guide rail (11), and the control module (20) is fixedly connected to the inside of the mounting ring (4).

8. The steel pipe welding auxiliary device for steel furniture production according to claim 6 is characterized in that: The input end and the output end of the pressure acquisition module (18) are electrically connected to the output end and the input end of the control module (20), respectively; the input end and the output end of the displacement acquisition module (19) are electrically connected to the output end and the input end of the control module (20), respectively; and the output end of the control module (20) is electrically connected to the input end of the air pump (8).

9. The steel pipe welding auxiliary device for steel furniture production according to claim 6, characterized in that: The control logic of the control module (20) for the working state of the air pump (8) is as follows: Stage 1 (rapid inflation): The airbag (6) is inflated until the support rod (7) contacts the inner wall of the steel pipe (S≥S min ), trigger displacement threshold; Phase 2 (voltage regulation): Monitor the rate of pressure change When the velocity approaches zero When , the contact is determined to be stable; Phase 3 (security verification): Calculate K, if K ≥ K crit (critical evaluation coefficient), stop inflation.

10. The steel pipe welding auxiliary device for steel furniture production according to claim 9, characterized in that: The calculation formula of the evaluation coefficient K is: Where, P: real-time pressure of airbag (6), S: real-time displacement of strut (7), Pressure change rate, α, β: weight coefficients.

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