Method and device for correcting welding deformation of I-shaped component

Abstract

According to the method and device for correcting welding deformation of the I-shaped component, a deformed part of an I-shaped flange plate is locally heated by adopting an inversion variable-frequency induction heating technology, a traditional manual flame heating correction method is replaced, and automatic thermal correction is achieved by controlling the longitudinal movement speed through a conveying roller way; the problem that ultra-thick plate I-shaped components and narrow flange plate I-shaped components cannot be mechanically corrected is solved, and automatic production of multi-specification H-shaped components is achieved by being matched with a traditional correcting machine.

Description

Technical Field

[0001] The invention relates to the field of steel structure manufacturing, and in particular to a method and a device for correcting welding deformation of an I-shaped component. Background Art

[0002] In the field of steel structures, a large number of I-shaped structural parts are used. After the welding of I-shaped components is completed, the flange plates will produce transverse angular deformation. Traditional H-shaped steel welding production lines generally use I-shaped straightening machines for mechanical straightening. However, for thick plate structures, the power and pressure of the I-shaped straightening machine cannot meet the straightening requirements; for narrow flange I-shaped components, the flange width is too small to adapt to the structural dimensions of the I-shaped straightening machine, and the straightening machine cannot be used for straightening. For the above situations where the I-shaped straightening machine cannot be used, the traditional process uses flame heating for straightening. Flame straightening has the following disadvantages: (1) The manual labor of flame heating straightening is much greater than that of mechanical straightening, and the operation process requires the experience of workers. (2) The thermal efficiency of this method is very low, and the energy loss is large. (3) Flame combustion produces a large amount of CO2 gas, which has a large carbon emission. (4) The production efficiency is low, and automated production cannot be achieved. (5) The heating temperature varies in a large range, and overburning can easily cause the mechanical properties of the steel plate to deteriorate. (6) When combustible gas and oxygen are sprayed out of the nozzle, a lot of noise is generated, the ambient temperature is high, and the working environment is poor, so few people are willing to do this work. Summary of the Invention

[0003] In response to the shortcomings of the existing technology, the present invention provides a method and device for correcting welding deformation of I-shaped components, which realizes the longitudinal movement of the I-shaped components through roller transmission, realizes the automated production of thermal correction of welding deformation, improves production efficiency, uses electricity to reduce carbon emissions, and improves the thermal correction environment.

[0004] The present invention achieves the above technical objectives through the following technical means.

[0005] A method for correcting welding deformation of an I-shaped component comprises the following steps:

[0006] Step 1: Determine the heating parameters based on the preliminary test data: the heating width is controlled by the shape of the induction coil, and the heating depth is controlled by the frequency and movement speed of the inverter induction power supply. The higher the frequency, the more obvious the skin benefits and the shallower the heating depth. To prevent overburning and damage to the material properties, the maximum heating temperature is controlled by the control unit for different materials, usually at 600℃-800℃.

[0007] Step 2: Select the shape and size of the induction coil based on the web thickness and weld width of the I-shaped component;

[0008] Step 3: Place the I-shaped component on the roller conveyor with the web plate horizontal, the flange plate vertical, and the axis of the I-shaped component parallel to the roller conveyor, and move it longitudinally to the induction coil position via the roller conveyor;

[0009] Step 4: Place the induction coil close to the flange plate of the I-shaped component and use the slider to move the induction coil so that it is aligned with the deformed position on the back of the weld.

[0010] Step 5: The spring pressing device presses the I-shaped expansion joint to press the induction coil onto the flange plate. The distance between the induction coil and the flange plate is controlled by the roller, and the distance is fixed during the entire heating process.

[0011] Step 6: Set the correction parameters on the control unit panel: sensor frequency, heating temperature, and movement speed;

[0012] Step 7, the induction coil works;

[0013] Step 8: The heating area starts to heat up. When the set temperature is reached, the roller starts to drive, the I-shaped component starts to move at the set speed, and the deformation area of ​​the flange plate starts to be heated continuously and linearly;

[0014] Step 9: The I-shaped component moves out of the heating zone, the induction heating ends, and the induction coil is reset to its initial state;

[0015] Step 10: After heating is completed, allow the I-shaped component to cool naturally and adjust the welding deformation by relying on the metal contraction in the heated area.

[0016] An apparatus for correcting welding deformation of I-shaped components comprises a column, a bracket, a square telescopic guide cylinder and an I-shaped telescopic head; the column is connected to one end of the bracket via a first rotating shaft and a locking device, and the first rotating shaft and the locking device can drive the bracket to rotate relative to the column; the other end of the bracket is connected to the second rotating shaft and the locking device, and the second rotating shaft and the locking device are connected to the slider, and the slider is slidably connected to the connecting plate, and one end of the square guide cylinder is also provided on the connecting plate, a spring pressing device is provided on the middle section of the square guide cylinder, and an I-shaped telescopic head and a temperature measuring device are provided on the other end of the square guide cylinder, and an induction coil is supported on the I-shaped telescopic head.

[0017] In the above solution, the I-shaped telescopic head includes two extension sections and a middle section, wherein the extension sections are provided with rollers and the middle section is provided on a square guide cylinder; under the action of external force, the I-shaped telescopic head can slide relative to the square guide cylinder.

[0018] In the above scheme, the elastic pressing device is an I-shaped structure, including two springs and a support frame, wherein a spring is provided on the support frame, and the telescopic ends of the springs on both sides are in contact with the I-shaped telescopic head. During correction work, the spring is in a compressed state.

[0019] In the above solution, the induction coil is cooled by a water cooling circulation system.

[0020] In the above solution, the temperature measuring device measures the temperature of the I-shaped component and transmits the temperature to the control unit. The control unit controls whether to start the roller conveyor. When the temperature exceeds the set maximum temperature, the induction coil stops heating.

[0021] In the above solution, the I-shaped component is arranged on the roller conveyor.

[0022] In the above scheme, the inverter power supply frequency is 5KHZ-12KHZ and the power is 50-100KVA.

[0023] In the above solution, the shape of the induction coil is circular, butterfly-shaped or rectangular; the heating width is 40-120 mm.

[0024] In the above scheme, the temperature measuring device shown is an infrared temperature sensor.

[0025] Beneficial effects:

[0026] 1. The induction heating technology employed in this invention uses variable-frequency current to generate a magnetic field. This variable magnetic field generates current within the steel plate, generating heat through the internal resistance of the current. This technology offers high thermal efficiency. The use of an IGBT inverter inductor enables variable frequency operation. High-frequency current exhibits a skin effect, with higher frequencies causing current to concentrate at the surface, which can easily create a temperature gradient across the thickness of the steel plate. By experimentally selecting the appropriate induction frequency and heating time, the temperature field generated by flame heating across the thickness of the steel plate can be replicated, achieving the desired thermal correction.

[0027] 2. Inverter frequency induction heating technology is used to locally heat the deformed parts of the I-shaped flange plate, replacing the traditional manual flame heating correction method. The longitudinal movement speed is controlled by the transmission roller to achieve automated thermal correction, solving the problem that ultra-thick plate I-shaped components and narrow flange plate I-shaped components cannot be corrected mechanically. In combination with traditional correction machines, it realizes the automated production of H-shaped components of various specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of welding deformation of I-shaped components;

[0029] Figure 2 This is a schematic diagram of the correction principle of the work shape correction machine;

[0030] Figure 3 This is a schematic diagram of the induction heating orthopedic principle;

[0031] Figure 4 This is a schematic diagram of a device for correcting welding deformation of I-shaped components;

[0032] Figure 5 for Figure 4 lateral schematic diagram of ;

[0033] Figure 6This is a schematic diagram of a correction device for welding deformation of I-shaped components.

[0034] Reference numerals:

[0035] 1-Inverter sensor power supply; 2-Water cooling circulation system; 3-Column; 4-First rotating shaft and locking device; 5-Bracket; 6-Second rotating shaft and locking device; 7-Slider; 8-Connecting plate; 9-Square guide cylinder; 10-Spring clamping device; 11-Roller; 12-I-shaped telescopic head; 13-Induction coil; 14-Temperature measuring device; 15-Roller; 16-Control unit; 21-Steel plate; 22-Eddy current; 23-Copper induction coil; 24-Cooling water; 25-Heated metal. DETAILED DESCRIPTION

[0036] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "axial", "radial", "vertical", "horizontal", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are 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 cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0038] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0039] A method for correcting welding deformation of an I-shaped component comprises the following steps:

[0040] Step 1: Determine heating parameters based on preliminary test data: the heating width is controlled by the shape of the induction coil 13, and the heating depth is controlled by the frequency and movement speed of the inverter inductor power supply 1. The higher the frequency, the more obvious the skin benefits and the shallower the heating depth. To prevent overburning and damage to the material properties, the maximum heating temperature is controlled by the control unit 16 for different materials, usually at 600°C-800°C.

[0041] Step 2: Select the shape and size of the induction coil 13 according to the web thickness and weld width of the I-shaped component;

[0042] Step 3: Place the I-shaped component on the roller 15 with the web plate horizontal, the flange plate vertical, and the axis of the I-shaped component parallel to the roller 15, and move it longitudinally to the position of the induction coil 13 via the roller 15;

[0043] Step 4: Place the induction coil 13 close to the flange plate of the I-shaped component and use the slider 7 to move the induction coil 13 so that the induction coil 13 is aligned with the deformed position on the back of the weld.

[0044] Step 5: The spring pressing device 10 presses the I-shaped expansion joint 12 to press the induction coil 13 onto the flange plate. The distance between the induction coil 13 and the flange plate is controlled by the roller 11. The distance is fixed during the entire heating process.

[0045] Step 6, set the correction parameters on the control unit 16 panel: sensor frequency, heating temperature, and movement speed;

[0046] Step 7, the induction coil 13 works;

[0047] Step 8: The heating area starts to heat up. When the set temperature is reached, the roller 15 starts to drive, the I-shaped component starts to move at the set speed, and the deformation area of ​​the flange plate starts to be heated continuously and linearly;

[0048] Step 9: The I-shaped component moves out of the heating zone, the induction heating ends, and the induction coil 13 is reset to its initial state;

[0049] Step 10: After heating is completed, allow the I-shaped component to cool naturally and adjust the welding deformation by relying on the metal contraction in the heated area.

[0050] An apparatus for correcting welding deformation of I-shaped components comprises a column 3, a bracket 5, a square telescopic guide cylinder 9 and an I-shaped telescopic head 12; the column 3 is connected to one end of the bracket 5 via a first rotating shaft and a locking device 4, and the first rotating shaft and the locking device 4 can drive the bracket 5 to rotate relative to the column 3; the other end of the bracket 5 is connected to the second rotating shaft and the locking device 6, and the second rotating shaft and the locking device 6 are connected to the slider 7, and the slider 7 is slidably connected to the connecting plate 8, and one end of the square guide cylinder 9 is also provided on the connecting plate 8, and a spring pressing device 10 is provided on the middle section of the square guide cylinder 9, and an I-shaped telescopic head 12 and a temperature measuring device 14 are provided on the other end of the square guide cylinder 9, and an induction coil 13 is supported on the I-shaped telescopic head 12.

[0051] In the above scheme, the I-shaped telescopic head 12 includes two extension sections and a middle section, wherein the extension section is provided with a roller 11, and the middle section is provided on the square guide cylinder 9; under the action of external force, the I-shaped telescopic head 12 can slide relative to the square guide cylinder 9.

[0052] In the above scheme, the elastic pressing device 10 is an I-shaped structure, including two springs and a support frame, wherein a spring is provided on the support frame, and the telescopic ends of the springs on both sides are in contact with the I-shaped telescopic head 12. During correction work, the spring is in a compressed state.

[0053] In the above solution, the induction coil 13 is cooled by the water cooling circulation system 2 .

[0054] In the above solution, the temperature measuring device 14 measures the temperature of the I-shaped component and transmits the temperature to the control unit 16. The control unit 16 controls whether to start the roller 15. When the temperature exceeds the set maximum temperature, the induction coil 13 stops heating.

[0055] In the above solution, the I-shaped component is arranged on the roller conveyor 15 .

[0056] In the above scheme, the frequency of the inverter inductor power supply 1 is 5KHZ-12KHZ, and the power is 50-100KVA.

[0057] In the above solution, the shape of the induction coil 13 is circular, butterfly-shaped or rectangular; the heating width is 40-120 mm.

[0058] In the above solution, the temperature measuring device 14 is an infrared temperature sensor.

[0059] Example

[0060] Combined with attachment Figure 1 As shown in FIG, I-shaped structural members are widely used in the field of steel structures. After the welding of I-shaped structural members is completed, the flange plates will produce transverse angular deformation.

[0061] Combined with attachment Figure 2 As shown, the I-shaped structure applicable to the present invention is usually composed of flange plates and web plates, etc. The web plates are connected to the flange plates through welds to form functional components. After welding, the flange plates will produce transverse angular deformation.

[0062] Combined with attachment Figure 3 As shown, a copper induction coil 23 is placed above a steel plate 21 and energized. This generates an alternating magnetic field around the copper induction coil 23, which produces eddy currents 22 near the surface of the steel plate 21. These eddy currents generate resistive heat that heats this area. As the heating temperature rises, the steel in the heated area expands, but this expansion is constrained by the surrounding, cooler steel plates, causing irreversible plastic deformation of the heated metal 25. After the copper induction coil 23 leaves the heated area, the heated area begins to cool and contract. Because plastic deformation of the metal in the heated area is irreversible, the contraction of the metal in the heated area stretches the metal in the surrounding area, generating a force in the opposite direction of the welding deformation to correct the deformation.

[0063] Combined with attachment Figure 4-6 As shown, it is suitable for correcting welding angle deformation of I-shaped components with flange plate thickness ranging from 20mm to 100mm.

[0064] The vertical position of the heater is adjusted by the vertical slider 7, which is suitable for correcting welding angle deformation of I-shaped components with flange width B ranging from 200mm to 1200mm.

[0065] Through the column 3, the bracket size and rotation angle are adapted to the height H of the I-shaped component in the range of 300mm to 4000mm.

[0066] Through the square guide cylinder 9, I-shaped telescopic head 12, spring clamping device 10, and roller 11, the induction coil 13 is kept at a fixed distance from the flange plate, while adapting to the small range deviation of the axis position of the I-shaped component on the roller 15.

[0067] IGBT variable frequency inductor 1 has a frequency of 5KHZ-12KHZ and a power of 50-100KVA;

[0068] Choose circular, butterfly, rectangular and other induction coils according to different heating widths, with heating widths ranging from 40 to 120 mm.

[0069] The induction coil 13 is provided with a supporting water cooling system 2 to prevent the induction coil from being damaged by overheating and ensure continuous normal operation.

[0070] The temperature of the steel plate is measured by an infrared thermometer and the temperature is extracted to the control unit 16. When the temperature is heated to the set temperature, it starts to move; when the temperature exceeds the maximum set temperature, an alarm is triggered and the power is automatically cut off. At this time, the power and moving speed need to be adjusted.

[0071] Combined with Appendix 1, preliminary test data determined heating parameters: heating temperature and curing parameters formed into process instructions, see Table 1. The heating width is controlled by the shape of the induction coil, and the heating depth is controlled by the frequency and movement speed of the induction coil. The higher the frequency, the more obvious the skin benefits and the shallower the heating depth. To prevent overheating and damage to the material properties, the maximum heating temperature is controlled by a temperature control device for different materials, usually between 600°C and 800°C.

[0072] Compared with the traditional process, the technical solution proposed by the present invention has the following characteristics:

[0073] 1) This correction method adopts induction heating, which has high energy conversion efficiency and saves energy consumption.

[0074] 2) This correction method uses induction heating, which has a fast heating speed and improves work efficiency;

[0075] 3) This correction method can control the heating temperature, avoiding the overburning problem caused by traditional flame heating;

[0076] 4) This correction method has been tested in the early stage to solidify the operation process and eliminate the differences in workers' operating experience;

[0077] 5) This correction method only requires workers to start and stop the process, and no worker operation is required during the process.

[0078] 6) This correction method produces very little noise and no high-temperature gas emissions, greatly improving the working environment compared to traditional processes;

[0079] 7) This correction method uses only electricity and no gas, thus achieving zero carbon emissions.

[0080] 8) The correction device can be installed longitudinally on the existing mechanical correction production line without the need for additional production lines and has no impact on the original process layout.

[0081] The correction device can be installed longitudinally on an existing mechanical correction production line, and cooperate with the existing production line. The correction method is selected according to the component size, and the automated production of H-shaped components of various specifications can be realized.

[0082] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0083] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A method for correcting welding deformation of an I-shaped component, characterized in that: The steps include: Step 1, determine the heating parameters based on the preliminary test data: the heating width is controlled by the shape of the induction coil (13), and the heating depth is controlled by the frequency and moving speed of the inverter induction power supply (1). The higher the frequency, the more obvious the skin effect and the shallower the heating depth. In order to prevent over-burning and damage to the performance of the material, the maximum heating temperature is controlled by the control unit (16) for different materials, and the temperature is usually controlled at 600°C-800°C; Step 2, selecting the shape and size of the induction coil (13) according to the web thickness and weld width of the I-shaped component; Step 3, place the I-shaped component on the roller (15), with the web plate horizontal, the flange plate vertical, and the axis of the I-shaped component parallel to the roller (15), and move it longitudinally to the position of the induction coil (13) through the roller (15); Step 4, placing the induction coil (13) close to the flange plate of the I-shaped component, and moving the induction coil (13) by means of the slider (7) so that the induction coil (13) is aligned with the deformed position on the back side of the weld; Step 5: The spring pressing device (10) presses the I-shaped expansion joint (12) to press the induction coil (13) onto the flange plate, and the distance between the induction coil (13) and the flange plate is controlled by the roller (11). The distance is fixed during the entire heating process; Step 6, setting the correction parameters on the control unit (16) panel: sensor frequency, heating temperature, and movement speed; Step 7, the induction coil (13) works; Step 8: The heating area starts to heat up. When the set temperature is reached, the roller (15) starts to drive, the I-shaped component starts to move at the set speed, and the flange plate deformation area starts to be heated continuously and linearly; Step 9: The I-shaped component moves out of the heating zone, the induction heating ends and the heating is stopped, and the induction coil (13) is reset to the initial state; Step 10: After heating is completed, allow the I-shaped component to cool naturally and adjust the welding deformation by relying on the metal contraction in the heated area.

2. A device for implementing the method for correcting welding deformation of I-shaped components according to claim 1, characterized in that: The invention comprises a column (3), a bracket (5), a square telescopic guide cylinder (9) and an I-shaped telescopic head (12); the column (3) is connected to one end of the bracket (5) through a first rotating shaft and a locking device (4), and the first rotating shaft and the locking device (4) can drive the bracket (5) to rotate relative to the column (3); the other end of the bracket (5) is connected to the second rotating shaft and the locking device (6), and the second rotating shaft and the locking device (6) are connected to the slider (7), and the slider (7) is slidably connected to the connecting plate (8), and one end of the square guide cylinder (9) is also provided on the connecting plate (8), and a spring pressing device (10) is provided on the middle section of the square guide cylinder (9), and the other end of the square guide cylinder (9) is provided with an I-shaped telescopic head (12) and a temperature measuring device (14), and the I-shaped telescopic head (12) supports an induction coil (13).

3. The I-shaped component welding deformation correction device according to claim 2, characterized in that: The I-shaped telescopic head (12) comprises two extension sections and a middle section, wherein the extension sections are provided with rollers (11) and the middle section is provided on a square guide cylinder (9); under the action of an external force, the I-shaped telescopic head (12) can slide relative to the square guide cylinder (9).

4. The I-shaped component welding deformation correction device according to claim 2, characterized in that: The elastic pressing device (10) is an I-shaped structure, comprising two springs and a support frame, wherein the support frame is provided with a spring, and the telescopic ends of the springs on both sides are in contact with the I-shaped telescopic head (12), and during correction work, the spring is in a compressed state.

5. The I-shaped component welding deformation correction device according to claim 2, characterized in that: The induction coil (13) is cooled by a water cooling circulation system (2).

6. The I-shaped component welding deformation correction device according to claim 2, characterized in that: The temperature measuring device (14) measures the temperature of the I-shaped component and transmits the temperature to the control unit (16). The control unit (16) controls whether to start the roller (15). When the temperature exceeds the set maximum temperature, the induction coil (13) stops heating.

7. The I-shaped component welding deformation correction device according to claim 2, characterized in that: The I-shaped component is arranged on a roller conveyor (15).

8. The I-shaped component welding deformation correction device according to claim 2, characterized in that: The inverter inductor power supply (1) has a frequency of 5KHZ-12KHZ and a power of 50-100KVA.

9. The I-shaped component welding deformation correction device according to claim 2, characterized in that: The induction coil (13) is circular, butterfly-shaped or rectangular in shape; and has a heating width of 40-120 mm.

10. The I-shaped component welding deformation correction device according to claim 2, characterized in that: The temperature measuring device (14) shown is an infrared temperature sensor.

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