Metal pipe pulse electromagnetic field assisted stress aging treatment method and medium

Abstract

The invention provides a metal pipe pulse electromagnetic field assisted stress aging treatment method and a medium, and the method comprises the following steps: setting a pressing span, a supporting span and a vibration amplitude according to the specification of a metal pipe; the first supporting system and the second supporting system located at the two ends of the metal pipe are controlled to move to preset positions, and the needed supporting span is achieved; the metal pipe sequentially penetrates through the first supporting system, the pressure loading system and the second supporting system and then is connected with the driving system; the pressure loading system is located between the first supporting system and the second supporting system and applies downward pressing bending to the metal pipe to reach the vibration amplitude. The driving system drives the metal pipe to move; a pulse electromagnetic field system is arranged at the pressing bending applying position, and pulse electromagnetic field intensity parameters are set; and the driving system is controlled to move in the direction close to the second supporting system, and treatment of the whole metal pipe is completed.

Description

Technical Field

[0001] The present invention relates to the technical field of metal pipe processing, and in particular to a pulse electromagnetic field assisted stress aging treatment method and medium for metal pipes. Background Art

[0002] Aging is a common heat treatment process for metal pipes. It involves subjecting the pipe to a specific temperature for a specific period of time, causing its internal structure to change over time to meet operational requirements. Aging can effectively improve the strength and hardness of various metal pipes while reducing the adverse effects of internal stress.

[0003] Traditional aging methods for metal pipes have significant limitations. First, due to the long duration of traditional aging treatments (which can range from several hours to several years, depending on the type of metal pipe and application scenario), the efficiency of traditional aging equipment for metal pipes is low. Second, the long, high-temperature aging treatments result in significant energy consumption, which is detrimental to energy conservation, emission reduction, and environmental protection.

[0004] Chinese patent publication CN110863161B discloses an aging process for squeeze-cast aluminum alloys. This process, which relates to the field of aluminum alloy processing technology, involves aging the aluminum alloy through a combination of pre-aging, high-temperature aging, low-temperature aging, and ultra-low-temperature aging. By controlling the aging temperature and aging time, and using auxiliary treatment techniques, the alloy achieves a fine, dispersed distribution of precipitates within the grains and a discontinuous distribution of precipitates at the grain boundaries, effectively improving the hardness and mechanical properties of the aluminum alloy. However, this process suffers from low efficiency and high energy consumption.

[0005] Therefore, it is necessary to seek a more perfect aging treatment method for metal pipes. Summary of the Invention

[0006] In view of the defects in the prior art, the purpose of the present invention is to provide a pulse electromagnetic field assisted stress aging treatment method and medium for metal pipes.

[0007] According to the present invention, a pulse electromagnetic field assisted stress aging treatment method for metal pipes includes:

[0008] Step S1: Set the downward pressure span L according to the specifications of the metal pipe up , support span L low and the vibration amplitude A;

[0009] Step S2: Control the first support system and the second support system at both ends of the metal pipe to move to the preset position to achieve the required support span L low ;

[0010] Step S3: Passing the metal pipe through the first support system, the pressure loading system, and the second support system in sequence and then connecting them to the drive system;

[0011] The pressure loading system is located between the first support system and the second support system, and applies downward pressure to the metal pipe to bend it to achieve a vibration amplitude A; the driving system drives the metal pipe to move;

[0012] Step S4: setting a pulsed electromagnetic field system at the downward bending application location and setting pulsed electromagnetic field intensity parameters;

[0013] Step S5: Control the driving system to move in a direction close to the second supporting system to complete the processing of the entire metal pipe.

[0014] Preferably, the pressure loading system includes a herringbone load-bearing structure and a vibration generator;

[0015] The bottom of the herringbone load-bearing structure includes two connection ports, and the metal pipe passes through the two connection ports; the vibration generator is connected to the top of the herringbone load-bearing structure.

[0016] Preferably, the step S5 comprises: driving the system to move in a direction close to the second support system until the distance between the two is (L low -L up ) / 2.

[0017] Preferably, the first support system, the pressure loading system, the second support system and the pulse electromagnetic field system are concentrically arranged based on the metal pipe, and the concentricity deviation is ≤ 0.1% of the inner diameter of the metal pipe 600.

[0018] Preferably, the metal pipe passes through the first support system, the pressure loading system, the pulse electromagnetic field system, and the second support system in sequence and is connected to the drive system. The drive system fixes one end of the pipe through the internal expansion of the pipe fixing device.

[0019] Preferably, the driving system drives the metal pipe to rotate circumferentially and move radially.

[0020] Preferably, in step S5, the head and tail of the metal pipe subjected to stress aging treatment are low / 2 length are removed respectively, and the part that has been completely stress-aged is retained.

[0021] According to a computer-readable storage medium storing a computer program provided by the present invention, when the computer program is executed by a processor, the steps of the pulsed electromagnetic field assisted stress aging treatment method for metal pipes are implemented.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention uses pulsed electromagnetic field to assist stress aging, which greatly reduces the aging treatment temperature of metal pipes and greatly shortens the aging treatment time, thereby improving the aging treatment efficiency and saving aging treatment energy consumption;

[0024] 2. The present invention reduces the temperature required for aging treatment and shortens the treatment time, thereby significantly reducing the consumption of electricity and other forms of energy, which is beneficial to energy conservation, emission reduction and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0026] Figure 1 This is an overall flow chart of the pulse electromagnetic field assisted stress aging treatment method for metal pipes in the present invention;

[0027] Figure 2 This is an overall schematic diagram of the pulse electromagnetic field assisted stress aging treatment device for metal pipes in the present invention;

[0028] Figure 3 Schematic diagram of the pressure loading system of the pulse electromagnetic field assisted stress aging treatment device for metal pipes in the present invention;

[0029] Figure 4 Schematic diagram of the first support system of the pulse electromagnetic field assisted stress aging treatment device for metal pipes in the present invention;

[0030] Figure 5 Schematic diagram of the second support system of the pulse electromagnetic field assisted stress aging treatment device for metal pipes in the present invention;

[0031] Figure 6 Schematic diagram of the driving system of the pulse electromagnetic field assisted stress aging treatment device for metal pipes in the present invention;

[0032] Figure 7 This is a schematic diagram of the pulse electromagnetic field system of the pulse electromagnetic field assisted stress aging treatment device for metal pipes in the present invention.

[0033] Description of reference numerals:

[0034]

[0035] DETAILED DESCRIPTION

[0036] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0037] like Figure 1 As shown, the present invention provides a pulse electromagnetic field assisted stress aging treatment method for metal pipes, which includes the following steps:

[0038] S1: Calculate the bending loading parameters. Calculate the required downward pressure span L based on the size of the metal pipe 600 and the required bending stress level. up , support span L low And the vibration amplitude A. Where the downward pressure span L up The shortest distance between the two ends of the metal pipe 600 is the support span L. low It is the maximum distance between the supporting structures at both ends of the metal pipe 600.

[0039] S2: Replace the support assembly. According to the size and span calculation results of the metal pipe 600, replace the herringbone load-bearing structure 104, support mechanism 106, first support mechanism 203, second support mechanism 303, pipe fixing device 407 and pulse electromagnetic coil 503 with matching sizes.

[0040] S3: Adjusting the span: Turn on the first non-contact displacement sensors 206 and 306 to measure the distance, turn on the first drive motors 204 and 304 to move the first support system 200 and the second support system 300 to a preset position to achieve a preset support span.

[0041] S4: Initialize the position of the drive system. Turn on the third non-contact displacement sensor 409 to measure the distance, turn on the third drive motor 406, and move the drive system 400 from the far end of the guide rail 107 to the second support system 300 until the distance between the two reaches (L low -L up ) / 2.

[0042] S5: Adjust the coaxiality of the support assembly and the electromagnetic coil. Turn on the lifting drive motor 103 to adjust the height of the crossbeam 101, the height of the first elevating brackets 202 and 302, and the height of the first elevating platforms 405 and 502 so that the support mechanism 106, the first support mechanism 203, the second support mechanism 303, the pipe fixture 407, and the pulse electromagnetic coil 503 are concentric. The concentricity deviation is ≤ 0.1% of the inner diameter of the metal pipe 600.

[0043] S6: Install the metal pipe. Pass one end of the metal pipe 600 through the first support mechanism 203, the support mechanism 106, the second support mechanism 303, and the center of the pulse electromagnetic coil 503 in sequence, and reach the pipe fixing device 407. The pipe fixing device 407 is used to fix the one end of the pipe by internal expansion.

[0044] S7: Setting pulse electromagnetic field parameters: Calculate the required pulse electromagnetic field intensity parameters based on the size and material of the metal pipe 600 , and set the parameters on the pulse power supply inside the pulse electromagnetic base 501 .

[0045] S8: Pulsed electromagnetic field-assisted stress aging treatment. Start the vibration generator 105, causing the metal tube 600 to bend downward under the action of the herringbone load-bearing structure 104 and the support mechanism 106, with the bending degree of the metal tube 600 reaching the vibration amplitude A. Start the servo motor 403, causing the metal tube 600 to rotate continuously at a set speed under the drive of the tube fixture 407. Simultaneously, start the third drive motor 406, causing the metal tube 600 to translate along the guide rail 107 at a set speed under the drive system 400. Start the pulse power supply inside the pulse electromagnetic base 501, and apply a pulse electromagnetic field to the metal tube 600 through the pulse electromagnetic coil 503, thereby generating a magnetostrictive effect inside the metal tube 600. Ultimately, pulse electromagnetic field-assisted stress aging treatment of the metal tube 600 is achieved.

[0046] S9: After the processing is completed, the system is shut down. After the entire pipe has completely passed through the pulse electromagnetic coil 503, the third drive motor 406 turns off the pulse power supply inside the pulse electromagnetic base 501, turns off the servo motor 403, and turns off the vibration generator 105.

[0047] S10: Remove the metal pipe. Loosen the pipe fixing device 407 and remove the metal pipe 600.

[0048] S11: Post-processing. The metal pipe 600mm and the tail L low / 2 length are removed respectively, and the rest of the parts that have been completely stress-aged are retained.

[0049] The present invention also provides a pulse electromagnetic field assisted stress aging treatment device for metal pipes, such as Figure 2As shown, the system comprises a pressure-loading system 100, a first support system 200, a second support system 300, a drive system 400, and a pulsed electromagnetic field system 500. It is used to perform aging treatment on a metal tube 600. Specifically, the first support system 200 and the second support system 300 are located on either side of the pressure-loading system 100, respectively, to support both ends of the metal tube 600. The pressure-loading system 100 applies bending stress to the metal tube 600. The drive system 400 drives the metal tube 600 to perform circumferential rotation and axial feed motion on the first support system 200, the second support system 300, and the pressure-loading system 100. Finally, the pulsed electromagnetic field system 500 is located below the pressure-loading system 100 to generate a pulsed electromagnetic field, thereby forming a magnetostrictive effect inside the metal tube 600.

[0050] The structure of the pulse electromagnetic field assisted stress aging treatment device for metal pipes is further described in detail below.

[0051] like Figure 3 As shown, the pressure loading system 100 includes a crossbeam 101 , a liftable column 102 , a lift drive motor 103 , a herringbone load-bearing structure 104 , a vibration generator 105 , a support mechanism 106 and a guide rail 107 .

[0052] Two liftable columns 102 stand on both sides of the guide rail 107 respectively, and the crossbeam 101 is installed on the top of the two liftable columns 102 across the guide rail 107. The lifting drive motor 103 is installed on the bottom side of the liftable columns 102, which can drive the liftable columns 102 to perform lifting movements, thereby adjusting the height of the crossbeam 101. The vibration generator 105 is installed on the lower surface of the crossbeam 101, and the herringbone load-bearing structure 104 is connected to the vibration generator 105 through threads. The herringbone load-bearing structures with different spans are equipped to meet different bending stress requirements. The support mechanism 106 is connected to the herringbone load-bearing structure 104 through threads. The interior of the support mechanism 106 is a two-way rolling auxiliary structure, which facilitates the continuous circumferential rotation and axial feeding of the metal pipe 600 during the stress aging treatment process. Equipped with multiple sets of support mechanisms 106 of different sizes, the stress aging requirements of metal pipes 600 of different sizes can be met. The outer diameter of the metal pipe 600 and the inner dimensions of the support mechanism 106 are tightly matched without any gap, thereby ensuring that the metal pipe 600 and the support mechanism 106 are precisely coaxial. In a preferred embodiment, the specific form of the vibration generator 105 can be a vibration device driven by a cylinder, a hydraulic cylinder, an ultrasonic generator, a servo motor, etc. It should be noted that the types of vibration generators are not limited to these.

[0053] like Figure 4As shown, the first support system 200 includes a first support base 201 , a first liftable bracket 202 , a first support mechanism 203 , a first drive motor 204 , a roller assembly 205 and a first non-contact displacement sensor 206 .

[0054] The first support system 200 is arranged on one side of the pressure-loading system 100 along the guide rail 107. Four roller assemblies 205 are mounted on the bottom of the first support base 201 and driven by a first drive motor 204, enabling the entire first support system 200 to move along the guide rail 107 at a specified speed. The first support mechanism 203 is threadedly mounted on the top of the first elevating bracket 202. The first elevating bracket 202 can move up and down, ensuring precise coaxiality between the first support mechanism 203, the metal pipe 600, and the support mechanism 106. A first non-contact displacement sensor 206 is mounted on the support base 203, facing the pulsed electromagnetic base 501 of the pulsed electromagnetic field system 500. This sensor is used to monitor the distance between the support system 203 and the pulsed electromagnetic base 501 of the pulsed electromagnetic field system 500 in real time and provide feedback control over the first drive motor 204, ensuring that the first support system 200 can move along the guide rail 107 to a precise position at a specified distance from the pulsed electromagnetic base 501 of the pulsed electromagnetic field system 500.

[0055] like Figure 5 As shown, the second support system 300 includes a second support base 301 , a second liftable bracket 302 , a second support mechanism 303 , a second drive motor 304 , a second roller set 305 and a second non-contact displacement sensor 306 .

[0056] Opposite the first support system 200, the second support system 300 is arranged along the guide rail 107 on the other side of the pressure-loading system 100. Four sets of second rollers 305 are mounted on the bottom of the second support base 301 and driven by a second drive motor 304, enabling the entire first support system 300 to move along the guide rail 107 at a specified speed. The second support mechanism 303 is threadedly mounted on top of the second elevating bracket 302. The second elevating bracket 302 can move up and down, ensuring that the second support mechanism 303 is precisely coaxial with the metal pipe 600, the first support mechanism 203, and the support mechanism 106. The second non-contact displacement sensor 306 is placed on the support base 303, facing the pulse electromagnetic base 501 of the pulse electromagnetic field system 500, and is used to monitor the distance between the support system 303 and the pulse electromagnetic base 501 of the pulse electromagnetic field system 500 in real time, and feedback control the second drive motor 304, so as to ensure that the first support system 300 can move along the guide rail 107 to a precise position where the distance between it and the pulse electromagnetic base 501 of the pulse electromagnetic field system 500 is a specified value.

[0057] like Figure 6As shown, the drive system 400 includes a drive base 401, a reducer 402, a servo motor 403, a gear box 404, a first liftable platform 405, a third drive motor 406, a pipe fixing device 407, a third roller set 408 and a third non-contact displacement sensor 409.

[0058] Opposite the first support system 200, the drive system 400 is arranged along the guide rail 107 on the other side of the pressure-loading system 100 and the second support system 300. Four sets of third rollers 408 are mounted on the bottom of the drive base 401 and driven by the third drive motor 406, enabling the entire drive system 400 to move along the guide rail 107 at a specified speed. One end of the pipe fixture 407 has an adjustable internal expansion fixture suitable for pipes of different inner diameters. The other end has a gear mounted within the gear box 404, forming a gear set with the gears within the gear box 404. The width of the gear box 404, the number of internal gear sets, and the number of pipe fixtures 407 can be adjusted as needed to efficiently and simultaneously perform stress aging treatment on multiple pipes. The reducer 402, gearbox 404, and servo motor 403 are mounted on a first elevating platform 405. The low-speed lever of the reducer 402 is equipped with a gear and mounted within the gearbox 404. The high-speed lever of the reducer 402 is connected to the main shaft of the servo motor 403 via a universal joint. This allows the servo motor 403 to continuously rotate the tubing 600 at a specified speed through the meshing gears within the reducer 402, gearbox 404, and the tubing fixture 407. The first elevating platform 405 can move up and down, ensuring precise coaxiality between the tubing 600, the second support mechanism 303, the first support mechanism 203, and the support mechanism 106. A third non-contact displacement sensor 409, located at the bottom of the drive base 401, monitors the distance traveled by the drive system 400 along the guide rail 107 in real time and provides feedback control over the third drive motor 406, ensuring that the drive system 400 travels at a specified speed along the guide rail 107 to a specified, precise position.

[0059] like Figure 7 As shown, the pulsed electromagnetic field system 500 includes a pulsed electromagnetic base 501 , a second liftable platform 502 and a pulsed electromagnetic coil 503 .

[0060] The pulsed electromagnetic field system 500 is positioned below the crossbeam 101 of the pressure loading system 100. A pulsed electromagnetic base 501, housing a pulsed power supply, spans the guide rail 107 and is secured on either side to the lower portions of the two liftable columns 102. A second liftable platform 502 is mounted on the pulsed electromagnetic base 501. A pulsed electromagnetic coil 503 is mounted on the second liftable platform 502 and can be adjusted in height to ensure precise coaxiality between the pulsed electromagnetic coil 503, the metal tube 600, the tube fixture 407, the second support mechanism 303, the first support mechanism 203, and the support mechanism 106. During the pulsed electromagnetic field-assisted stress aging treatment, the metal tube 600 passes through the center of the pulsed electromagnetic coil 503 without touching it. This ensures a uniform pulsed electromagnetic field is formed within the metal tube 600, generating a magnetostrictive effect along the axial direction of the metal tube 600 to assist in the stress aging treatment. The width of the second liftable platform 502 and the number of the pulse electromagnetic coils 503 can be adjusted as needed to efficiently perform pulse electromagnetic field assisted stress aging treatment on multiple pipes at the same time.

[0061] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply 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 a limitation on this application.

[0062] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A pulse electromagnetic field assisted stress aging treatment method for metal pipes, characterized in that: include: Step S1: Set the downward pressure span L according to the specifications of the metal pipe up , support span L low and the vibration amplitude A; Step S2: Control the first support system and the second support system at both ends of the metal pipe to move to the preset position to achieve the required support span L low ; Step S3: Passing the metal pipe through the first support system, the pressure loading system, and the second support system in sequence and then connecting them to the drive system; The pressure loading system is located between the first support system and the second support system, and applies downward pressure to the metal pipe to bend it to achieve a vibration amplitude A; The driving system drives the metal pipe to move; Step S4: setting a pulsed electromagnetic field system at the downward bending application location and setting pulsed electromagnetic field intensity parameters; Step S5: Control the driving system to move in a direction close to the second supporting system to complete the processing of the entire metal pipe.

2. The pulse electromagnetic field assisted stress aging treatment method for metal pipes according to claim 1, characterized in that: The pressure loading system includes a herringbone load-bearing structure and a vibration generator; The bottom of the herringbone load-bearing structure includes two connection ports, and the metal pipe passes through the two connection ports; the vibration generator is connected to the top of the herringbone load-bearing structure.

3. The pulse electromagnetic field assisted stress aging treatment method for metal pipes according to claim 1, characterized in that: The step S5 includes: the driving system moves in a direction close to the second supporting system until the distance between the two is (L low -L up ) / 2.

4. The pulse electromagnetic field assisted stress aging treatment method for metal pipes according to claim 1, characterized in that: The first support system, the pressure loading system, the second support system and the pulse electromagnetic field system are concentrically arranged based on the metal pipe, and the concentricity deviation is ≤ 0.1% of the inner diameter of the metal pipe 600.

5. The pulse electromagnetic field assisted stress aging treatment method for metal pipes according to claim 1, characterized in that: The metal pipe passes through the first support system, the pressure loading system, the pulse electromagnetic field system, and the second support system in sequence and is connected to the drive system. The drive system fixes one end of the pipe through the internal expansion of the pipe fixing device.

6. The pulse electromagnetic field assisted stress aging treatment method for metal pipes according to claim 1, characterized in that: The driving system drives the metal pipe to rotate circumferentially and move radially.

7. The pulse electromagnetic field assisted stress aging treatment method for metal pipes according to claim 1, characterized in that: In step S5, the metal pipe head and tail L that have undergone stress aging treatment are low / 2 length are removed respectively, and the part that has been completely stress-aged is retained.

8. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the pulse electromagnetic field assisted stress aging treatment method for metal pipes according to any one of claims 1 to 7 are implemented.

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