CN116038216A - Welding process for steel pipe and flange - Google Patents

Welding process for steel pipe and flange Download PDF

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Publication number
CN116038216A
CN116038216A CN202310038097.4A CN202310038097A CN116038216A CN 116038216 A CN116038216 A CN 116038216A CN 202310038097 A CN202310038097 A CN 202310038097A CN 116038216 A CN116038216 A CN 116038216A
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CN
China
Prior art keywords
flange
welding
steel pipe
assembly
control device
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310038097.4A
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Chinese (zh)
Inventor
王孟果
梁剑明
邵丹丹
李成银
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Guangzhou Wenchong Shipyard Co Ltd
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Guangzhou Wenchong Shipyard Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Guangzhou Wenchong Shipyard Co Ltd filed Critical Guangzhou Wenchong Shipyard Co Ltd
Priority to CN202310038097.4A priority Critical patent/CN116038216A/en
Publication of CN116038216A publication Critical patent/CN116038216A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/0426—Fixtures for other work
    • B23K37/0435—Clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor
    • B23K37/0533—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor external pipe alignment clamps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding In General (AREA)

Abstract

The invention relates to the technical field of welding, in particular to a welding process of a steel pipe and a flange. The deformation of the flange caused by welding is converted into vertical upward force applied to the moving assembly in the welding process of the first group of flanges and the steel pipe, wherein the deformation of the first welding bead is converted into stress F1, the deformation caused by the second welding bead and the deformation caused by the first welding bead are accumulated into F2 until the last welding bead is accumulated into Fn, after the record is carried out through the control device, the fixing device is driven by the control device to apply acting force with opposite directions to the flange in the welding process of the second group of flanges and the steel pipe, the acting force applied during the welding of the first welding bead is F1, the acting force applied during the beginning of the second welding bead is Fx, so that the stress of the welding bead received by the flange in the welding process is counteracted, and the possibility of deformation of the steel pipe and the flange after the welding is reduced.

Description

Welding process for steel pipe and flange
Technical Field
The invention relates to the technical field of welding, in particular to a welding process of a steel pipe and a flange.
Background
In industrial production, a flange is often sleeved on the outer surface of the end part of a steel pipe, and then welding and combination are carried out. In the conventional direct welding process, because a large welding residual stress exists in the welding seam, after the welding seam is contacted with the rigid constraint of the flange and the steel pipe, the flange is at a risk of generating large angular deformation under the action of the welding residual stress, and correction, machining and even scrapping treatment are often required for the flange.
Disclosure of Invention
Based on the above, the invention provides a welding process of the steel pipe and the flange, which reduces deformation generated after the steel pipe and the flange are welded.
The technical scheme of the invention is as follows: the welding process of the steel pipe and the flange comprises a base, a control device and a fixing device for fixing the flange and the steel pipe, wherein the fixing device is fixed on the base and comprises a positioning column, a moving assembly, a clamping assembly and a pressure gauge assembly, the positioning column is fixed on the base, a fixing part of the moving assembly is arranged on the positioning column, the clamping assembly is fixed on a moving part of the moving assembly and is used for clamping the flange, the pressure gauge assembly is arranged on the clamping assembly or the moving assembly and is used for measuring stress applied by the flange to the fixing device, and the pressure gauge assembly and the moving assembly are electrically connected with the control device;
the welding process based on the fixing device comprises the steps of flange installation, parameter recording, sample trial production and formal production, wherein:
the mounting flange comprises the steps that the flange is placed on the base, and the clamping assembly is fixed to the flange after the control device drives the moving assembly to push the flange to a preset position.
The parameter recording comprises the steps of automatically welding the steel pipe and the flange after the steel pipe is arranged, deforming the flange in the welding process and forming vertical upward stress on the fixing device, recording acting force born by the fixing device when each welding pass is measured by the pressure gauge assembly through the control device, wherein the average pressure born by the fixing device when the first welding pass is F1, the average pressure born by the fixing device when the nth welding pass is Fn, and dismantling the first group of steel pipes and the flange after the welding is completed.
Sample trial comprises, after installing the second group of flanges and the steel pipe, automatically welding the steel pipe and the flanges, driving the moving assembly to apply vertical downward acting force to the flanges through the control device while welding, wherein the acting force applied during the first welding pass is F1, starting from the second welding pass,
Fx＝Fn－F(n－1)，
fx is the vertical downward acting force exerted on the flange by the movable assembly during the welding of the nth pass, F (n-1) is the average pressure born by the fixing device during the (n-1) th pass, and Fn is the average pressure born by the fixing device during the nth pass.
The formal production comprises the steps of detecting the product obtained by sample trial, and repeating the sample trial procedures for production after confirming that the welding strength is normal.
Optionally, the fixing device further comprises an infrared light emitting component installed on the positioning column, and the infrared light emitting component is electrically connected with the control device.
Optionally, the infrared light emitting component is rotationally connected with the positioning column.
Optionally, the step of installing the flange is preceded by a step of position determination, wherein:
the position determination comprises the step of inputting the sizes of the flange and the steel pipe into the control device, and the control device drives the infrared light emitting assembly to act so as to display the preset position of the flange on one surface of the base close to the flange.
Optionally, the moving assembly comprises a horizontal hydraulic cylinder and a vertical hydraulic cylinder, the fixed end of the horizontal hydraulic cylinder is fixed on the positioning column, the fixed end of the vertical hydraulic cylinder is fixed on the moving end of the horizontal hydraulic cylinder, and the clamping assembly is mounted on the moving end of the vertical hydraulic cylinder.
Optionally, the number of the fixing devices is at least two, and the two fixing devices are uniformly distributed along the peripheral side of the flange.
Optionally, the number of the fixing devices is two, and the two fixing devices are symmetrically distributed along the axis direction of the flange.
Optionally, the clamping assembly further comprises a clamping block, a step part is formed at one end, close to the flange, of the clamping block, and the outer surface side of the step part is attached to the outer peripheral surface of the flange.
Optionally, a bevel part is arranged on one side of the clamping block, which is far away from the horizontal hydraulic cylinder, and the bevel part is communicated with the step part.
Optionally, the step mounting flange further comprises the following:
the control device drives the moving assembly to enable the inclined surface portion to be abutted to the outer peripheral surface of the flange, the clamping block is extruded with the flange to enable the flange to move along the inclined surface portion, and the horizontal hydraulic cylinder and the vertical hydraulic cylinder are driven to move to enable the outer peripheral surface of the flange to be abutted to the step portion.
Optionally, the step of applying prestressing force is further included between the step of installing the flange and the step of parameter recording:
the pre-stressing comprises the step that the moving assembly moves along the vertical direction, so that a pre-stressing force F0 exists between the clamping assembly and the flange, and F0 is recorded through the control device.
Optionally, the direction of the prestress force F0 is vertically upward, and with the vertically upward direction being a positive direction, F0 > 0.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
according to the welding process of the steel pipe and the flange, deformation of the flange caused by welding is converted into vertical upward force applied to the moving assembly in the welding process of the first group of the flange and the steel pipe, wherein deformation in the welding process of the first welding bead is converted into stress F1, deformation in the second welding bead and deformation in the first welding bead are accumulated into F2 until the last welding bead is accumulated into Fn, the fixing device is driven by the control device to apply acting force in opposite directions to the flange in the welding process of the second group of the flange and the steel pipe after the recording of the control device, the acting force applied in the welding process of the first welding bead is F1, the acting force applied in the beginning of the second welding bead is Fx, so that stress of the welding bead received by the flange in the welding process is counteracted, and the possibility of deformation of the steel pipe and the flange after the welding is reduced.
Drawings
Fig. 1 is a schematic structural diagram of a welding process of a steel pipe and a flange according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of a fixing device according to an embodiment of the present invention.
Fig. 3 is a schematic structural view of a vertical hydraulic cylinder and clamping assembly according to an embodiment of the present invention.
Reference numerals illustrate:
100. a base, a base seat and a base seat,
200. the control device is used for controlling the control device,
300. a flange, a flange plate and a flange,
400. the steel pipe is provided with a plurality of grooves,
500. a fixing device 1, a positioning column 2, a moving assembly 21, a horizontal hydraulic cylinder 22, a vertical hydraulic cylinder 3, a clamping assembly 31, a step part 32, a bevel part 4, a pressure gauge assembly 5 and an infrared light emitting assembly,
600. and (5) welding the bead.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like are used herein to describe various information, but such information should not be limited to these terms, which are merely used to distinguish one type of information from another. For example, a "first" message may also be referred to as a "second" message, and similarly, a "second" message may also be referred to as a "first" message, without departing from the scope of the invention.
Referring to fig. 1 to 3, the present embodiment provides a welding process 100 for a steel pipe and a flange, which includes a base 100, a control device 200, a fixing device 500 for fixing the flange 300 and the steel pipe 400, wherein the fixing device 500 is fixed on the base 100, the fixing device 500 includes a positioning column 1, a moving component 2, a clamping component 3 and a pressure gauge component 4, the positioning column 1 is fixed on the base 100, a fixing portion of the moving component 2 is mounted on the positioning column 1, the clamping component 3 is fixed on a moving portion of the moving component 2 for clamping the flange 300, the pressure gauge component 4 is mounted on the clamping component 3 or the moving component 2 for measuring stress applied by the flange 300 to the fixing device 500, and the pressure gauge component 4 and the moving component 2 are electrically connected with the control device 200.
The welding process based on the above-described fixture 500 includes the steps of installing the flange 300, parameter recording, sample trial and actual production, wherein,
the mounting flange 300 includes placing the flange 300 on the base 100, driving the moving assembly 2 by the control device 200 to push the flange 300 to a preset position, and fixing the flange 300 by the clamping assembly 3.
The parameter record includes that after the steel pipe 400 is arranged, the steel pipe 400 and the flange 300 are automatically welded, the flange 300 deforms in the welding process and forms vertical upward stress on the fixing device 500, the control device 200 records the acting force applied to the fixing device 500 when each welding pass 600 is measured by the pressure gauge assembly 4, wherein the average pressure applied to the fixing device 500 when the first welding pass 600 is F1, the average pressure applied to the fixing device 500 when the nth welding pass 600 is Fn, and after the welding is finished, the first group of steel pipes 400 and the flange 300 are removed.
Sample trial comprises, after installing the second set of flanges 300 and the steel pipe 400, automatically welding the steel pipe 400 and the flanges 300, and simultaneously driving the moving assembly 2 to apply a vertical downward acting force to the flanges 300 through the control device 200, wherein the acting force applied during the welding of the first welding bead 600 is F1, starting from the second welding bead 600,
Fx＝Fn－F(n－1)，
fx is the vertical downward force exerted by the mobile assembly 2 on the flange 300 during the welding of the nth pass 600, F (n-1) is the average pressure to which the fixture 500 is subjected during the (n-1) th pass 600, and Fn is the average pressure to which the fixture 500 is subjected during the nth pass 600.
The formal production comprises the steps of detecting the product obtained by sample trial, and repeating the sample trial procedures for production after confirming that the welding strength is normal.
The deformation of the flange 300 caused by welding is converted into a vertical upward force applied to the moving assembly 2 in the process of welding the first group of flanges 300 and the steel pipe 400, wherein the deformation of the first welding bead 600 is converted into stress F1, the deformation of the second welding bead 600 and the deformation of the first welding bead 600 are accumulated into F2 until the deformation of the last welding bead 600 is accumulated into Fn, the fixing device 500 is driven by the control device 200 to apply an acting force with opposite directions to the flange 300 in the process of welding the second group of flanges 300 and the steel pipe 400 after being recorded by the control device 200, the acting force applied by the first welding bead 600 is F1, and the acting force applied by the second welding bead 600 is Fx, so that the stress of the welding bead 600 received by the flange 300 in the welding process is counteracted, and the possibility of deformation of the steel pipe 400 and the flange 300 after being welded is reduced.
Preferably, in fig. 1 and 2, in the present embodiment, the fixing device 500 further includes an infrared light emitting component 5 mounted on the positioning post 1, and the infrared light emitting component 5 is electrically connected to the control device 200. The specification of the flange 300 to be welded is input into the control device 200, the infrared light emitting assembly 5 is controlled to emit infrared light to mark the preset position of the flange 300 after being calculated by the control device 200, and an operator can judge whether the flange 300 is at the preset position under the action of the moving assembly 2 by observing the relative positions of the infrared light mark and the flange 300.
Preferably, in the present embodiment, the infrared light emitting component 5 is rotatably connected to the positioning post 1. By rotating the infrared light emitting assembly 5, the angle of the infrared light emitting assembly 5 is changed, so that infrared light marks with different sizes can be drawn and applied to flanges 300 with different specifications and sizes.
Preferably, in this embodiment, step mounting flange 300 is preceded by step position determination, wherein,
the position determination includes inputting the dimensions of the flange 300 and the steel pipe 400 into the control device 200, and the control device 200 drives the infrared light emitting assembly 5 to act so as to display the preset position of the flange 300 on the side of the base 100 close to the flange 300.
Preferably, referring to fig. 2, in the present embodiment, the moving assembly 2 includes a horizontal hydraulic cylinder 21 and a vertical hydraulic cylinder 22, the fixed end of the horizontal hydraulic cylinder 21 is fixed to the positioning column 1, the fixed end of the vertical hydraulic cylinder 22 is fixed to the moving end of the horizontal hydraulic cylinder 21, and the clamping assembly 3 is mounted on the moving end of the vertical hydraulic cylinder 22. The position of the clamping assembly 3 in the horizontal direction is adjusted by a horizontal hydraulic cylinder 21, and the position of the clamping assembly 3 in the vertical direction is adjusted by a vertical hydraulic cylinder 22.
Preferably, referring to fig. 1, in the present embodiment, the number of the fixing devices 500 is at least two, and the two fixing devices 500 are uniformly distributed along the outer circumferential side of the flange 300. Specifically, in the present embodiment, the number of the fixing devices 500 is two, and the two fixing devices 500 are symmetrically distributed along the axial direction of the flange 300. By the same displacement of the fixing device 500 in all directions, the center of the flange 300 coincides with the preset center after the flange 300 is clamped, and the possibility of errors in the welding process is reduced.
Preferably, referring to fig. 1 to 3, in the present embodiment, the clamping assembly 3 further includes a clamping block, one end of the clamping block, which is close to the flange 300, is provided with a step portion 31, and an outer surface side of the step portion 31 is attached to an outer peripheral surface of the flange 300. The flange 300 can be accurately positioned by clamping the flange 300 through the step part 31.
Preferably, referring to fig. 3, in the present embodiment, a bevel portion 32 is provided on a side of the clamping block away from the horizontal hydraulic cylinder 21, and the bevel portion 32 communicates with the step portion 31. The step of installing the flange 300 further comprises the step of driving the moving assembly 2 through the control device 200 to enable the inclined surface portion 32 to be in contact with the outer peripheral surface of the flange 300, extruding the clamping block with the flange 300 to enable the flange 300 to move along the inclined surface portion 32, and driving the horizontal hydraulic cylinder 21 and the vertical hydraulic cylinder 22 to move to enable the outer peripheral surface of the flange 300 to be in contact with the stepped portion 31. By moving the assembly 2 so that the inclined surface portion 32 abuts against the outer peripheral surface of the flange 300 and the flange 300 moves along the inclined surface portion 32, the accuracy of the engagement of the outer side wall of the flange 300 with the stepped portion 31 can be ensured.
Preferably, in this embodiment, a step pre-stressing is also included between the step mounting flange 300 and the step parameter record, wherein,
the prestressing force is applied by moving the moving assembly 2 in a vertical direction such that a prestressing force F0 exists between the clamping assembly 3 and the flange 300, and the F0 is recorded by the control device 200. The direction of the prestress F0 is vertically upwards, and F0 is more than 0 by taking the vertical upwards as the positive direction. Ensuring sufficient contact of the clamping assembly 3 to the flange 300 also reduces the gap between the flange 300 and the base 100 and reduces the possibility of errors during welding.
In the welding process for the steel pipe 400 and the flange 300 provided in the embodiment, the dimensions of the flange 300 and the steel pipe 400 are input into the control device 200, and the control device 200 drives the infrared light emitting assembly 5 to act so as to display the preset position of the flange 300 on the surface of the base 100 close to the flange 300.
The flange 300 is placed on the base 100, the over-control device 200 drives the moving assembly 2 to enable the inclined surface part 32 to be abutted against the outer circumferential surface of the flange 300, the clamping block is extruded with the flange 300 to enable the flange 300 to move along the inclined surface part 32, the horizontal hydraulic cylinder 21 and the vertical hydraulic cylinder 22 are driven to move to enable the outer circumferential surface of the flange 300 to be abutted against the stepped part 31, and the clamping assembly 3 is fixed to the flange 300.
After the steel pipe 400 is set, the moving assembly 2 is moved in the vertical direction so that the prestress F0 exists between the clamping assembly 3 and the flange 300, and the F0 is recorded by the control device 200. The steel pipe 400 and the flange 300 are automatically welded, the flange 300 deforms in the welding process and forms vertical upward stress on the fixing device 500, the acting force applied to the fixing device 500 when each welding bead 600 measured by the pressure gauge assembly 4 is recorded by the control device 200, and the first group of steel pipes 400 and the flange 300 are removed after the welding is completed.
After the second group of flanges 300 and the steel pipe 400 are installed, the steel pipe 400 and the flanges 300 are automatically welded, and the control device 200 drives the moving assembly 2 to apply vertical downward acting force to the flanges 300 during welding, wherein the acting force applied during the welding of the first welding bead 600 is F1, and the welding starts from the second welding bead 600,
Fx＝Fn－F(n－1)，
fx is the vertical downward force exerted by the mobile assembly 2 on the flange 300 during the welding of the nth pass 600, F (n-1) is the average pressure to which the fixture 500 is subjected during the (n-1) th pass 600, and Fn is the average pressure to which the fixture 500 is subjected during the nth pass 600.
Detecting the product obtained by sample trial, and repeating the procedures of sample trial after confirming that the welding strength is normal.
The welding process of the steel pipe 400 and the flange 300 of the embodiment has the following beneficial effects:
1. the deformation of the flange 300 caused by welding is converted into a vertical upward force applied to the moving assembly 2 in the process of welding the first group of flanges 300 and the steel pipe 400, wherein the deformation of the first welding bead 600 is converted into stress F1, the deformation of the second welding bead 600 and the deformation of the first welding bead 600 are accumulated into F2 until the deformation of the last welding bead 600 is accumulated into Fn, the fixing device 500 is driven by the control device 200 to apply an acting force with opposite directions to the flange 300 in the process of welding the second group of flanges 300 and the steel pipe 400 after being recorded by the control device 200, the acting force applied by the first welding bead 600 is F1, and the acting force applied by the second welding bead 600 is Fx, so that the stress of the welding bead 600 received by the flange 300 in the welding process is counteracted, and the possibility of deformation of the steel pipe 400 and the flange 300 after being welded is reduced.
2. The specification of the flange 300 to be welded is input into the control device 200, the infrared light emitting assembly 5 is controlled to emit infrared light to mark the preset position of the flange 300 after being calculated by the control device 200, and an operator can judge whether the flange 300 is at the preset position under the action of the moving assembly 2 by observing the relative positions of the infrared light mark and the flange 300.
3. The moving assembly 2 enables the inclined surface part 32 to be abutted with the outer peripheral surface of the flange 300, and enables the flange 300 to move along the inclined surface part 32, so that the accuracy of clamping the outer side wall of the flange 300 on the step part 31 can be ensured, and the flange 300 can be accurately positioned through clamping the step part 31.
While the foregoing is directed to the preferred embodiments of the present invention, it should be noted that modifications and variations could be made by those skilled in the art without departing from the principles of the present invention, and such modifications and variations are to be regarded as being within the scope of the invention.

Claims (12)

1. The welding process of the steel pipe and the flange is characterized by comprising a base, a control device and a fixing device for fixing the flange and the steel pipe, wherein the fixing device is fixed on the base and comprises a positioning column, a moving assembly, a clamping assembly and a pressure gauge assembly, the positioning column is fixed on the base, a fixing part of the moving assembly is arranged on the positioning column, the clamping assembly is fixed on a moving part of the moving assembly and is used for clamping the flange, the pressure gauge assembly is arranged on the clamping assembly or the moving assembly and is used for measuring stress applied by the flange to the fixing device, and the pressure gauge assembly and the moving assembly are electrically connected with the control device;
the welding process based on the fixing device comprises the following steps of:
and (2) mounting a flange: the flange is placed on the base, and the clamping assembly is fixed to the flange after the control device drives the moving assembly to push the flange to a preset position;
and (3) parameter recording: after the steel pipe is arranged, automatically welding the steel pipe and the flange, wherein the flange deforms in the welding process and forms vertical upward stress on the fixing device, the control device records acting force applied to the fixing device during each welding pass measured by the pressure gauge assembly, wherein the average pressure applied to the fixing device during the first welding pass is F1, the average pressure applied to the fixing device during the nth welding pass is Fn, and the first group of steel pipes and the flange are removed after the welding is completed;
sample test: after the second group of flanges and the steel pipe are installed, the steel pipe and the flanges are automatically welded, and the control device drives the moving assembly to apply vertical downward acting force to the flanges during welding, wherein the acting force applied during the welding of the first welding pass is F1, and the welding starts from the second welding pass,
Fx＝Fn－F(n－1)，
fx is the vertical downward acting force exerted on the flange by the movable assembly during the welding of the nth pass, F (n-1) is the average pressure born by the fixing device during the (n-1) th pass, and Fn is the average pressure born by the fixing device during the nth pass;
formally producing: detecting the product obtained by sample trial, and repeating the procedures of sample trial after confirming that the welding strength is normal.
2. The process for welding a steel pipe to a flange according to claim 1, wherein the fixing device further comprises an infrared light emitting assembly mounted on the positioning column, and the infrared light emitting assembly is electrically connected with the control device.
3. The process for welding a steel pipe to a flange according to claim 2, wherein the infrared light emitting assembly is rotatably connected to the positioning column.
4. The welding process of steel pipe and flange according to claim 2, characterized in that the step of installing the flange is preceded by the steps of:
position determination: inputting the sizes of the flange and the steel pipe into the control device, and driving the infrared light emitting assembly to act by the control device so as to display the preset position of the flange on one surface of the base close to the flange.
5. The welding process of the steel pipe and the flange according to claim 1, wherein the moving assembly comprises a horizontal hydraulic cylinder and a vertical hydraulic cylinder, the fixed end of the horizontal hydraulic cylinder is fixed on the positioning column, the fixed end of the vertical hydraulic cylinder is fixed on the moving end of the horizontal hydraulic cylinder, and the clamping assembly is mounted on the moving end of the vertical hydraulic cylinder.
6. The welding process of steel pipe and flange according to claim 5, wherein the number of the fixing means is at least two, and the two fixing means are uniformly distributed along the outer circumferential side of the flange.
7. The welding process of steel pipes and flanges according to claim 6, wherein the number of the fixing devices is two, and the two fixing devices are symmetrically distributed along the axial direction of the flanges.
8. The welding process of the steel pipe and the flange according to claim 6, wherein the clamping assembly further comprises a clamping block, a stepped portion is formed at one end, close to the flange, of the clamping block, and the outer surface side of the stepped portion is attached to the outer peripheral surface of the flange.
9. The welding process of steel pipes and flanges according to claim 8, characterized in that a bevel portion is provided on a side of the clamping block away from the horizontal hydraulic cylinder, the bevel portion being in communication with the step portion.
10. The process for welding a steel pipe to a flange according to claim 9, wherein the step of installing the flange further comprises the steps of:
the control device drives the moving assembly to enable the inclined surface portion to be abutted to the outer peripheral surface of the flange, the clamping block is extruded with the flange to enable the flange to move along the inclined surface portion, and the horizontal hydraulic cylinder and the vertical hydraulic cylinder are driven to move to enable the outer peripheral surface of the flange to be abutted to the step portion.
11. The process for welding steel pipe to flange according to claim 1, characterized in that between the step of installing the flange and the step of parameter recording, the following steps are included:
and (3) applying prestress: the moving assembly moves along the vertical direction, so that prestress F0 exists between the clamping assembly and the flange, and F0 is recorded through the control device.
12. A process for welding a steel pipe to a flange according to claim 11, characterized in that the direction of the prestress force F0 is vertically upward and in that the vertical upward direction is positive, F0 > 0.
CN202310038097.4A 2023-01-10 2023-01-10 Welding process for steel pipe and flange Pending CN116038216A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310038097.4A CN116038216A (en) 2023-01-10 2023-01-10 Welding process for steel pipe and flange

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310038097.4A CN116038216A (en) 2023-01-10 2023-01-10 Welding process for steel pipe and flange

Publications (1)

Publication Number Publication Date
CN116038216A true CN116038216A (en) 2023-05-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310038097.4A Pending CN116038216A (en) 2023-01-10 2023-01-10 Welding process for steel pipe and flange

Country Status (1)

Country Link
CN (1) CN116038216A (en)

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