阅读说明：本技术 一种大口径复合管在线去应力处理装置及其工艺 (Online stress relief treatment device and process for large-diameter composite pipe ) 是由 张静 叶胡根 于 2021-09-17 设计创作，主要内容包括：本发明公开了一种大口径复合管在线去应力处理装置及其工艺,装置由感应加热组件、内测温组件、外控温组件、托辊组件和斜辊矫直组件组成,感应加热组件包括中低频加热模块和超音频加热模块,外控温组件包括测温模块和控温模块,整体布局为复合管首尾两端各安装有一组斜辊矫直组件,两组斜辊矫直组件之间依次安装有中低频加热模块低频、中频和低频三组感应加热装置、超音频加热模块感应加热装置以及各感应加热装置配套的外控温组件,内测温组件安装在复合管尾部,复合管在托辊组件和斜辊矫直组件的作用下沿其轴线向前运动。本发明利用和控制感应加热形成的温度梯度,有效解决了复合管基层、复层材料去应力处理温度差异造成的热处理缺陷。(The invention discloses an online stress relief processing device and a process thereof for a large-diameter composite pipe, wherein the device consists of an induction heating assembly, an inner temperature measuring assembly, an outer temperature control assembly, a carrier roller assembly and an inclined roller straightening assembly, the induction heating assembly comprises a medium-low frequency heating module and a superaudio frequency heating module, the outer temperature control assembly comprises a temperature measuring module and a temperature control module, the integral layout is that the head end and the tail end of the composite pipe are respectively provided with a group of inclined roller straightening assemblies, three groups of low-frequency, medium-frequency and low-frequency induction heating devices, a superaudio frequency heating module induction heating device and the outer temperature control assembly matched with each induction heating device are sequentially arranged between the two groups of inclined roller straightening assemblies, the inner temperature measuring assembly is arranged at the tail part of the composite pipe, and the composite pipe moves forwards along the axis under the action of the carrier roller assembly and the inclined roller straightening assembly. The invention utilizes and controls the temperature gradient formed by induction heating, and effectively solves the heat treatment defect caused by the stress removal treatment temperature difference of the base layer and the clad layer materials of the composite pipe.)

1. The utility model provides a compound online destressing processing apparatus of pipe of heavy-calibre, its mainly includes compound pipe (1), induction heating subassembly (3), interior temperature measurement subassembly (5), outer temperature control subassembly (4), bearing roller subassembly (6) and oblique roller straightening subassembly (2), its characterized in that: the composite pipe is characterized in that a group of inclined roller straightening assemblies (2) are respectively arranged at the head end and the tail end of the composite pipe (1), an induction heating assembly (3) and a carrier roller assembly (6) are arranged between the two groups of inclined roller straightening assemblies (2), the induction heating assembly (3) consists of a medium-low frequency heating module (31) and a superaudio frequency heating module (32) along the axial direction of the composite pipe (1) from the front to the back, the medium-low frequency heating module (31) and the superaudio frequency heating module (32) are both composed of induction heating devices, the induction heating devices are respectively matched with the outer temperature control assembly (4), the inner temperature measurement assembly (5) is arranged at the tail part of the composite pipe (1), and the inclined roller straightening assemblies (2) and the carrier roller assembly (6) drive the composite pipe (1) to move forwards at a set speed.

2. The on-line stress relief processing device for the large-caliber composite pipe as claimed in claim 1, wherein the middle and low frequency heating module (31) comprises three groups of induction heating devices, the frequency setting from front to back along the axial direction of the composite pipe (1) is low frequency (50 Hz-1 kHz), middle frequency (1 kHz-20 kHz) and low frequency (50 Hz-1 kHz), the ultrasonic frequency heating module (32) only comprises one group of induction heating devices, and the frequency setting is ultrasonic frequency (20 kHz-40 kHz).

3. The on-line stress relief processing device for the large-caliber composite pipe according to claim 2, wherein the induction heating device comprises a transformer (301), a wiring board (302), a motor (303), a gear (304), a sliding table (305), a rack (306), a heavy-duty guide rail (307), an inductor (308) and a water pipe (309), the heavy-duty guide rail (307) is installed on a foundation, the sliding table (305) is installed on the heavy-duty guide rail (307) in a sliding manner, the transformer (301) is fixedly installed at the upper end of the sliding table (305), the wiring board (302) is arranged at the side end of the transformer (301), the inductor (308) is fixedly installed on the wiring board (302), the inductor (308) is provided with a water inlet and a water outlet and is communicated with a cooling system through the water pipe (309), the rack (306) is fixedly arranged at the side of the heavy-duty guide rail (307), slip table (305) are close to the side of rack (306) is installed motor (303), motor (303) output shaft is installed gear (304), gear (304) with rack (306) meshing, induction heating device can follow compound pipe (1) axis direction short distance adjusting position.

4. The on-line stress relief processing device for the large-caliber composite pipe according to claim 1, wherein the inner temperature measuring assembly (5) mainly comprises a driving member (501), a linear bearing (502), an extrusion roller (503), a cantilever rod (504) and a first infrared camera (505), the bottom of the inner temperature measuring assembly (5) is consistent with the bottom structure of the induction heating device, and comprises a front and rear position adjusting system composed of the sliding table (305), the motor (303), the gear (304), the heavy-duty rack (306) and the heavy-duty guide rail (307), the driving member (501) is fixedly installed at the top of the sliding table (305), two pairs of the extrusion roller (503) and the linear bearing (502) are arranged at the top of the driving member (501), and a driving system for driving the extrusion roller (503) is arranged in the driving member (501), the axis of the linear bearing (502) is collinear with the axis of the composite pipe (1), the linear bearing (502) is coaxially installed with the cantilever rod (504), a mounting groove for circumferential stopping and mounting of the first infrared camera (505) is formed in the cantilever rod (504), the cantilever rod (504) can move along the axis under the action of the squeeze roll (503), four groups of first infrared cameras (505) are installed on the cantilever rod (504), and when the starting end of the cantilever rod (504) is aligned with the starting end of the medium-low frequency heating module (31), the four groups of first infrared cameras (505) are respectively located in the four groups of induction heating devices, and the inductors (308) surround the corresponding positions in the composite pipe (1).

5. The on-line stress relief processing device for the large-caliber composite pipe according to claim 1, wherein the outer temperature control assembly (4) comprises a temperature measurement module (41) and a temperature control module (42), the temperature measurement module (41) is composed of an XY support (404) and a second infrared camera (402), a fixed end of the XY support (401) is installed at a side end of the transformer (301), the second infrared camera (402) is installed at the bottom of a lifting end of the XY support (401), the temperature control module (42) comprises a telescopic member (403), a magnetic conductive member (404), a cooling member (405), a pipe hoop (406), a cooling pipe (407) and an L support (408), a fixed end of the L support (408) is installed at a side end of the sliding table (305) of the induction heating device, the magnetic conductive member (404) is installed at the top end of the L support (408), and the magnetic conductive member (404) is connected with the cooling member (405) through two sets of telescopic members (403), the input end of the cooling piece (405) is connected with the cooling pipe (407) through the pipe clamp (406).

6. The on-line destressing processing device of a large-caliber composite pipe according to claim 5, wherein the magnetizer (404) is formed by a plurality of arc magnetizers in a circumferential array, the cooling member (405) comprises two sections which can be independently controlled and are formed by a plurality of strip nozzles in a circumferential array, the nozzle of the cooling member (405) located at the inner section of the inductor (308) is staggered with the magnetizer corresponding to the magnetizer (404), and the nozzle array of the cooling member (405) located at the outer section of the inductor (308) is in accordance with the magnetizer array of the magnetizer (404).

7. The on-line stress relief treatment process for large-caliber composite pipes according to any one of claims 1 to 6, characterized by comprising the following steps:

s1, determining the stress relief heat treatment temperature corresponding to the base layer and the composite layer of the composite pipe:

the composite tube has the composite layer (inner layer) of alloy A, the base layer (outer layer) of alloy B and the stress-relieving annealing temperature range of alloy A of T₁~T₂Alloy B has a stress relief annealing temperature range of T₃~T₄；

S2, preliminarily determining process parameters through a numerical simulation technology, and debugging:

s21, the composite pipe is electromagnetically heated by the medium-low frequency heating module;

s22, the temperature of the outer surface of the base layer is always lower than T through the outer temperature control component₄；

S23, transferring heat to the composite layer through heat conduction, and monitoring the inner surface temperature of the composite layer by the inner temperature measuring component:

if the temperature of the inner surface of the multilayer is not reached (T)₁-40) to (T)₁-20), repeating steps S21 to S23 if the multilayer inner surface temperature reaches (T)₁-40) to (T)₁-20), then continue with step S24;

s24, the ultrasonic frequency heating module performs electromagnetic heating on the composite pipe;

s25, the outer temperature control component controls the outer surface temperature of the base layer, and the inner temperature measurement component monitors the inner surface temperature of the multilayer:

s251, if the temperature of the inner surface of the multilayer does not reach T₁Repeating the steps S24 to S251 if the inner surface temperature of the multilayer reaches T₁Then, continue to step S26;

s252, if the outer surface temperature of the base layer does not reach T₄Then, steps S24 to S252 are repeated, if the outer surface temperature of the base layer reaches T₄Then, continue to step S26;

s26, the composite tube base layer and the composite layer all meet the corresponding stress relief heat treatment temperature requirements;

s3, carrying out hardness test on the bonding layer of the composite pipe after stress relief heat treatment:

if the hardness test of the composite pipe bonding layer meets the mechanical property requirement, continuing to step S4, otherwise, repeating the steps S2 to S3;

and S4, determining process parameters, formulating a process card, and putting into production.

Technical Field

The invention relates to the field of composite pipes, in particular to an online stress relief treatment device and process for a large-diameter composite pipe.

Background

The bimetal composite pipe is formed by compounding two metal materials (a base layer and a composite layer) with different performance characteristics through a specific process (centrifugal casting, drawing, special welding and the like), so that advantages are greatly increased, and disadvantages are avoided, and the composite pipe has the advantages of the base layer metal and the composite layer metal. Due to the particularity of the process, the composite tube finished product needs to be subjected to internal stress removal through low-temperature annealing treatment except individual conditions, but the chemical components of the base material and the composite material are different greatly, and the temperature range of the stress removal treatment is different, so that furnace type (uniform) heating is not suitable for the stress removal annealing treatment of the composite tube, particularly the composite tube with large caliber and thick wall.

Disclosure of Invention

The main purpose of the present invention is to overcome at least one of the above-mentioned drawbacks of the prior art, and to provide an online stress relief processing apparatus and process for a large-diameter composite tube, wherein the temperature gradient formed by induction heating is utilized to control the temperature of the critical part of the composite tube during the induction heating and heat transfer processes, so that the temperatures of the inner and outer metal layers are within the respective stress relief processing temperature ranges, thereby obtaining good mechanical properties for both the inner and outer metal layers.

The purpose of the invention is realized by the following technical scheme: an on-line stress relief processing device for a large-diameter composite pipe, which mainly comprises a composite pipe, an induction heating assembly, an inner temperature measuring assembly, an outer temperature controlling assembly, a carrier roller assembly and an inclined roller straightening assembly, the head end and the tail end of the composite pipe are respectively provided with a group of the inclined roller straightening assemblies, the induction heating assembly and the carrier roller assembly are arranged between the two groups of the inclined roller straightening assemblies, the front part and the back part of the composite pipe are arranged along the axial direction of the composite pipe, the induction heating assembly consists of a medium-low frequency heating module and a superaudio frequency heating module, the medium-low frequency heating module and the superaudio frequency heating module are both composed of induction heating devices, the induction heating devices are all matched with the outer temperature control assembly, the tail part of the composite pipe is provided with the inner temperature measurement assembly, the inclined roller straightening assembly and the carrier roller assembly drive the composite pipe to move forwards at a set speed.

Preferably, the middle and low frequency heating module comprises three groups of induction heating devices, the frequency setting from front to back along the axial direction of the composite pipe is low frequency (50 Hz-1 kHz), medium frequency (1 kHz-20 kHz) and low frequency (50 Hz-1 kHz), the ultrasonic frequency heating module only comprises one group of induction heating devices, and the frequency setting is ultrasonic frequency (20 kHz-40 kHz).

Preferably, induction heating device includes transformer, wiring board, motor, gear, slip table, rack, heavy-duty guide rail, inductor and water service pipe, heavy-duty guide rail installs on the ground, heavy-duty guide rail slidable mounting has the slip table, slip table upper end fixed mounting has the transformer, the transformer side is equipped with the wiring board, inductor fixed mounting is in on the wiring board, the inductor is equipped with water inlet and delivery port, and passes through water service pipe and cooling system intercommunication, heavy-duty guide rail side is fixed to be provided with the rack, the slip table is close to the side of rack is installed the motor, motor output shaft installs the gear, the gear with rack toothing, induction heating device can follow compound pipe axis direction short distance adjusting position.

Preferably, the inner temperature measuring component mainly comprises a driving piece, a linear bearing, an extrusion roller, a cantilever rod and a first infrared camera, the bottom of the inner temperature measuring component is consistent with the bottom structure of the induction heating device, and the inner temperature measuring component comprises a front position adjusting system and a rear position adjusting system which are respectively composed of the sliding table, the motor, the gear, the rack and the heavy-duty guide rail, the driving piece is fixedly arranged at the top of the sliding table, the top of the driving piece is provided with two pairs of the extrusion roller and the linear bearing, the driving piece is internally provided with a driving system for driving the extrusion roller, the axis of the linear bearing is collinear with the axis of the composite pipe, the cantilever rod is coaxially arranged on the linear bearing, the mounting groove for circumferential locking and mounting the first infrared camera is arranged on the cantilever rod, and the cantilever rod can move along the axis under the action of the extrusion roller, the cantilever rod is provided with four groups of first infrared cameras, and when the starting end of the cantilever rod is aligned with the starting end of the medium-low frequency heating module, the four groups of first infrared cameras are respectively positioned at corresponding positions in the compound pipe surrounded by the four groups of induction heating devices and the inductor.

Preferably, the outer temperature control assembly comprises a temperature measurement module and a temperature control module, the temperature measurement module comprises an XY support and a second infrared camera, the fixed end of the XY support is installed at the side end of the transformer, the bottom of the lifting end of the XY support is provided with the second infrared camera, the temperature control module comprises a telescopic piece, a magnetic conduction piece, a cooling piece, a pipe hoop, a cooling pipe and an L support, the fixed end of the L support is installed at the side end of the sliding table of the induction heating device, the magnetic conduction piece is installed at the top end of the L support and is connected with the cooling piece through two sets of telescopic pieces, and the input end of the cooling piece is connected with the cooling pipe through the pipe hoop.

Preferably, the magnetizer is circumference array by the multiunit arc magnetizer and constitutes, the cooling part is circumference array by multiunit strip nozzle and constitutes including two sections that can independent control, the cooling part is located the nozzle of inductor inner section with correspond the crisscross array of magnetizer, the cooling part is located the nozzle array of inductor outer section with magnetizer array law is unanimous.

The invention also provides an on-line stress relief treatment process for the large-diameter composite pipe, which comprises the following steps:

s1, determining the stress relief heat treatment temperature corresponding to the base layer and the composite layer of the composite pipe:

the composite tube has the composite layer (inner layer) of alloy A, the base layer (outer layer) of alloy B and the stress-relieving annealing temperature range of alloy A of T₁~T₂Alloy B has a stress relief annealing temperature range of T₃~T₄Wherein T is₃＞T₁，T₄＞T₂In addition, the mechanical property of the metal material after the stress relief annealing treatment can be detected by a tensile test or a hardness test;

s2, preliminarily determining process parameters through a numerical simulation technology, and debugging:

s21, the composite pipe is electromagnetically heated by the medium-low frequency heating module;

s22, the temperature of the outer surface of the base layer is always lower than T through the outer temperature control component₄；

S23, transferring heat to the composite layer through heat conduction, and monitoring the inner surface temperature of the composite layer by the inner temperature measuring component:

if the temperature of the inner surface of the multilayer is not reached (T)₁-40) to (T)₁-20), repeating steps S21 to S23 if the multilayer inner surface temperature reaches (T)₁-40) to (T)₁-20), then continue with step S24;

s24, the ultrasonic frequency heating module performs electromagnetic heating on the composite pipe;

s25, the outer temperature control component controls the outer surface temperature of the base layer, and the inner temperature measurement component monitors the inner surface temperature of the multilayer:

s251, if the temperature of the inner surface of the multilayer does not reach T₁Repeating the steps S24 to S251 if the inner surface temperature of the multilayer reaches T₁Then, continue to step S26;

s252, if the outer surface temperature of the base layer does not reach T₄Then, steps S24 to S252 are repeated, if the outer surface temperature of the base layer reaches T₄Then, continue to step S26;

s26, the composite tube base layer and the composite layer all meet the corresponding stress relief heat treatment temperature requirements;

s3, carrying out hardness test on the bonding layer of the composite pipe after stress relief heat treatment:

if the hardness test of the composite pipe bonding layer meets the mechanical property requirement, continuing to step S4, otherwise, repeating the steps S2 to S3;

and S4, determining process parameters, formulating a process card, and putting into production.

Compared with the prior art, the invention has the following beneficial effects: the invention utilizes the arrangement and combination of low-frequency, medium-frequency and superaudio induction heating devices and the temperature gradient formed by induction heating, and controls the temperature of the key part of the composite tube in the induction heating and heat transfer processes, so that the final heating temperature of the inner metal layer and the final heating temperature of the outer metal layer are both in the temperature range of respective stress relief treatment, thereby improving the quality of the low-temperature annealing heat treatment of the composite tube and achieving the effect of eliminating the internal stress. The invention is suitable for the integral heat treatment of the large-caliber composite pipe, has the advantages of environmental protection, high production efficiency and the like compared with the traditional furnace type heat treatment, and is beneficial to the high-quality development of the large-caliber composite pipe.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a flow chart of the operation of the present invention;

FIG. 2 is a schematic diagram of the apparatus of the present invention;

FIG. 3 is a schematic view of the induction heating apparatus of the present invention;

FIG. 4 is a schematic structural view of an external temperature control assembly according to the present invention;

FIG. 4a is a schematic structural view of the magnetic conducting member of the external temperature control assembly of the present invention;

FIG. 4b is a schematic structural view of the cooling member of the external temperature control assembly of the present invention;

FIG. 5 is a schematic structural diagram of an internal temperature measurement assembly of the present invention.

Reference numbers in the figures: 1. a composite pipe; 2. a skew roll straightening assembly;

3. an induction heating assembly; 31. a medium-low frequency heating module; 32. a superaudio heating module; 301. a transformer; 302. a wiring board; 303. a motor; 304. a gear; 305. a sliding table; 306. a rack; 307. a heavy-duty guide rail; 308. an inductor; 309. a water pipe;

4. an external temperature control assembly; 41. a temperature measuring module; 42. a temperature control module; 401. an XY support; 402. a second infrared camera; 403. a telescoping member; 404. a magnetic conductive member; 405. a cooling member; 406. a pipe hoop; 407. a cooling tube; 408. an L bracket;

5. an inner temperature measuring component; 501. a drive member; 502. a linear bearing; 503. a squeeze roll; 504. a cantilever bar; 505. a first infrared camera;

6. bearing roller subassembly.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", and the like indicate directions or positional relationships based on those shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

A large-diameter Copper-Aluminum composite Tube (ACC Tube) is prepared by using a brass alloy as a Clad material (the temperature range of stress relief annealing treatment is 215-230 ℃, namely T₁=215℃，T₂=230 ℃), the base material is certain aluminum alloy (the temperature range of stress relief annealing treatment is 250 ℃ -290 ℃, namely T₃=250℃，T₄And (= 290 ℃), firstly preparing the composite plate by differential temperature rolling, and then forming the ACC tube by welding, so that the ACC tube finished product needs to be subjected to low-temperature annealing treatment to eliminate machining stress.

The utility model provides an online destressing processing apparatus of heavy-calibre ACC pipe, as shown in figure 2, it mainly includes ACC pipe 1, induction heating subassembly 3, interior temperature measurement subassembly 5, outer temperature control subassembly 4, bearing roller subassembly 6 and oblique roller straightening subassembly 2, ACC pipe 1 head and the tail both ends respectively are equipped with a set of oblique roller straightening subassembly 2, install induction heating subassembly 3 and bearing roller subassembly 6 between two sets of oblique roller straightening subassemblies 2, along ACC pipe 1 axis direction from the front to the back, induction heating subassembly 3 comprises well low frequency heating module 31 and super audio frequency heating module 32 two parts, well low frequency heating module 31 and super audio frequency heating module 32 constitute by induction heating device, induction heating device all matches and is equipped with outer temperature control subassembly 4, ACC pipe 1 afterbody is provided with interior temperature measurement subassembly 5, oblique roller straightening subassembly 2 and bearing roller subassembly 6 drive ACC pipe 1 forward motion according to set speed.

As shown in fig. 2, the medium and low frequency heating module 31 includes three sets of induction heating devices, the frequency settings from front to back along the axis direction of the ACC tube 1 are low frequency (500 Hz), medium frequency (8 kHz) and low frequency (800 Hz) in sequence, the ultrasonic frequency heating module 32 includes only one set of induction heating device, and the frequency setting is ultrasonic frequency (25 kHz).

As shown in fig. 3, the induction heating device includes a transformer 301, a wiring board 302, a motor 303, a gear 304, a sliding table 305, a rack 306, a heavy-load guide rail 307, an inductor 308 and a water pipe 309, the heavy-load guide rail 307 is installed on a foundation, the heavy-load guide rail 307 is slidably provided with the sliding table 305, the upper end of the sliding table 305 is fixedly provided with the transformer 301, the side end of the transformer 301 is provided with the wiring board 302, the inductor 308 is fixedly installed on the wiring board 302, the inductor 308 is provided with a water inlet and a water outlet and is communicated with a cooling system through the water pipe 309, the side of the heavy-load guide rail 307 is fixedly provided with the rack 306, the side end of the sliding table 305 close to the rack 306 is provided with the motor 303, the output shaft of the motor 303 is provided with the gear 304, the gear 304 is meshed with the rack 306, and the position of the induction heating device can be adjusted in a short distance along the axis direction of the ACC pipe 1.

As shown in fig. 5, the inner temperature measuring assembly 5 mainly includes a driving member 501, a linear bearing 502, a pressing roller 503, a cantilever rod 504 and a first infrared camera 505, the bottom of the inner temperature measuring assembly 5 is consistent with the bottom structure of the induction heating device, and each of the inner temperature measuring assembly 5 includes a front and rear position adjusting system composed of a sliding table 305, a motor 303, a gear 304, a rack 306 and a heavy-duty guide rail 307, the driving member 501 is fixedly installed at the top of the sliding table 305, the top of the driving member 501 is provided with two pairs of pressing rollers 503 and linear bearings 502, a driving system for driving the pressing roller 503 is installed inside the driving member 501, the axis of the linear bearing 502 is collinear with the axis of the ACC tube 1, the linear bearing 502 is coaxially installed with the cantilever rod 504, the cantilever rod 504 is provided with an installation groove for circumferential stopping and installing the first infrared camera 505, the cantilever rod 504 can move along the axis under the action of the pressing rollers 503, four sets of first infrared cameras 505 are installed on the cantilever rod 504, when the start ends of the cantilever levers 504 and the start ends of the medium and low frequency heating modules 31 are aligned, the four sets of first infrared cameras 505 are respectively located at corresponding positions inside the ACC tube 1 surrounded by the four sets of induction heating device inductors 308.

As shown in fig. 4, the external temperature control assembly 4 includes a temperature measurement module 41 and a temperature control module 42, the temperature measurement module 41 is composed of an XY bracket 404 and a second infrared camera 402, a fixed end of the XY bracket 401 is installed at a side end of the transformer 301, the second infrared camera 402 is installed at a bottom of a lifting end of the XY bracket 401, the temperature control module 42 includes a telescopic member 403, a magnetic conductive member 404, a cooling member 405, a pipe clamp 406, a cooling pipe 407 and an L bracket 408, a fixed end of the L bracket 408 is installed at a side end of a sliding table 305 of the induction heating apparatus, the magnetic conductive member 404 is installed at a top end of the L bracket 408, the magnetic conductive member 404 is connected to the cooling member 405 through two sets of telescopic members 403, and an input end of the cooling member 405 is connected to the cooling pipe 407 through the pipe clamp 406.

As shown in fig. 4a, the magnetizer 404 is formed by a plurality of arc magnetizers in a circumferential array, as shown in fig. 4b, the cooling element 405 is formed by two independently controllable segments and is formed by a plurality of groups of strip nozzles (the inner wall surface and the two side surfaces are provided with spray holes, the spray holes on the inner wall surface are used for controlling the temperature of the outer surface of the ACC tube 1 in the multilayer manner, the spray holes on the side surfaces are used for cooling the magnetizer 404 and controlling the temperature of the outer surface of the ACC tube 1 in the multilayer manner) in a circumferential array, the nozzles (mainly used for cooling the magnetizer 404 and controlling the temperature of the outer surface of the ACC tube 1 in the inner segment of the inductor 308 of the cooling element 405 are staggered in an array with the magnetizer 404, and the nozzle array (mainly used for controlling the temperature of the outer surface of the ACC tube 1 in the outer segment of the cooling element 405) in the inductor 308 is in accordance with the magnetizer array rule of the magnetizer 404.

In this embodiment, the cooling water is used to cool the temperature control and magnetic conducting member 404 on the outer surface of the multiple layer of the ACC tube 1, so that the temperature measuring environment outside the ACC tube 1 contains a large amount of water vapor during the heat treatment process, and the water vapor content inside the ACC tube is low, so that the second infrared camera 402 of the temperature measuring module 41 of the outer temperature control assembly 4 is a colorimetric thermometer, and the first infrared camera 505 of the inner temperature measuring assembly 5 is a (monochromatic) infrared thermometer.

In a preferred embodiment of the present invention, an on-line stress relief treatment process for a large-diameter ACC tube, as shown in fig. 1, comprises the following steps:

s1, determining the stress relief heat treatment temperature corresponding to the base layer and the multiple layer materials of the ACC tube:

the specification of the ACC tube is phi 406mm multiplied by 9.53mm, wherein the composite layer material is a brass alloy (the thickness is 1.33 mm), the base layer material is an aluminum alloy (the thickness is 8.2 mm), the stress relief annealing temperature range of the brass alloy is 215-230 ℃, the stress relief annealing temperature range of the aluminum alloy is 250-290 ℃, the stress relief annealing temperature range of the copper-aluminum bonding layer is undefined, the mechanical property after the stress relief annealing treatment needs to be detected through a tensile test or a hardness test, and is influenced by the size, and the hardness test is adopted in the embodiment;

s2, preliminarily determining process parameters through a numerical simulation technology, and debugging:

s21, performing electromagnetic heating on the ACC pipe by the medium-low frequency heating module;

s22, enabling the temperature of the outer surface of the base layer to be always lower than 290 ℃ through an outer temperature control assembly;

s23, transferring heat to the composite layer through heat conduction, and monitoring the inner surface temperature of the composite layer by the inner temperature measuring component:

if the temperature of the inner surface of the multi-layer does not reach 175-195 ℃, repeating the steps S21-S23, and if the temperature of the inner surface of the multi-layer reaches 175-195 ℃, continuing the step S24;

s24, the ultrasonic frequency heating module performs electromagnetic heating on the ACC tube;

s25, the outer temperature control component controls the outer surface temperature of the base layer, and the inner temperature measurement component monitors the inner surface temperature of the multilayer:

s251, if the temperature of the inner surface of the multilayer does not reach 215 ℃, repeating the steps S24 to S251, and if the temperature of the inner surface of the multilayer reaches 215 ℃, continuing to the step S26;

s252, if the temperature of the outer surface of the base layer does not reach 290 ℃, repeating the steps S24 to S252, and if the temperature of the outer surface of the base layer reaches 290 ℃, continuing to the step S26;

s26, enabling the base layer and the multiple layer of the ACC tube to meet the corresponding stress relief heat treatment temperature requirements;

s3, carrying out hardness test on the copper-aluminum bonding layer of the ACC pipe after stress relief heat treatment:

if the hardness test of the copper-aluminum bonding layer of the ACC tube meets the requirement of mechanical property, continuing to step S4, otherwise, repeating the steps S2 to S3;

and S4, determining process parameters, formulating a process card, and putting into production.

The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.