Quenching control system for aluminum alloy profile extrusion production

Abstract

The invention relates to the field of aluminum alloy profile production equipment, in particular to an efficient, energy-saving and high-controllability quenching control system combined with atomization treatment for aluminum alloy profile extrusion production. Comprising a rack, a control device, a conveying mechanism, a quenching box, an atomization treatment mechanism, an ultrasonic nebulizer, a water circulation mechanism, a nitrogen storage tank, an air pump, an air pipe, a first switch valve, a second switch valve, a water pump, a water inlet pipe, a water outlet pipe and a fan, a quenching cavity is formed in the quenching box, and an inlet and an outlet communicating with the quenching cavity are formed in the quenching box; the conveying mechanism is arranged in the quenching cavity in a penetrating mode through an inlet and an outlet and used for conveying aluminum alloy profiles, a mounting frame is arranged on the periphery of the quenching cavity, the atomization treatment mechanism is arranged on the mounting frame, a through hole is formed in the top of the quenching box, the fan is arranged at the position of the through hole, and a water storage tank is arranged at the bottom of the quenching box. A water outlet communicated with the water storage tank is formed in the quenching box.

Description

Technical Field

[0001] The present invention relates to the field of aluminum alloy profile production equipment, and particularly to a quenching control system for aluminum alloy profile extrusion production. Background Art

[0002] After being extruded and formed, aluminum alloy profiles need to be quenched to improve their mechanical properties. Traditional quenching methods mostly use water cooling or air cooling. Water cooling quenching has a fast cooling rate, but it is easy to cause profile deformation, large residual stress, and high water resource consumption; air cooling quenching has poor cooling uniformity and is difficult to meet the process requirements of high-strength aluminum alloys.

[0003] With the development of technology, spray quenching has emerged. Although the existing spray quenching can alleviate the above problems, there are uneven atomization particles and unstable cooling efficiency. Therefore, there is an urgent need for a quenching system that combines atomization treatment, is efficient, energy-saving, and has strong controllability. Summary of the Invention

[0004] Therefore, in view of the above problems, the present invention provides a quenching control system for aluminum alloy profile extrusion production that combines atomization treatment, is efficient, energy-saving, and has strong controllability.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A quenching control system for aluminum alloy profile extrusion production includes a frame, a control device, a conveying mechanism, a quenching tank, an atomization treatment mechanism, an ultrasonic atomizer, a water circulation mechanism, a nitrogen storage tank, an air pump, an air pipe, a first switching valve, a second switching valve, a water pump, a water inlet pipe, a water outlet pipe, and a blower. The quenching tank has a quenching chamber, and the quenching tank is provided with an inlet and an outlet communicating with the quenching chamber. The conveying mechanism passes through the quenching chamber through the inlet and the outlet for conveying aluminum alloy profiles. Installation frames are provided around the quenching chamber, and the atomization treatment mechanism is arranged on the installation frames. A through hole is provided at the top of the quenching tank, and the blower is arranged at the through hole. A water storage tank is provided at the bottom of the quenching tank, and a drain port communicating with the water storage tank is provided on the quenching tank. The drain port is connected to the water inlet end of the water circulation mechanism through the water outlet pipe;

[0007] The atomization treatment mechanism includes a plurality of medium adjustment units and nozzles arranged on each medium adjustment unit. The medium adjustment unit includes a housing, and an air chamber is provided inside the housing. The housing is provided with a mist inlet, a first air inlet, a second air inlet, and an air outlet communicating with the air chamber. The nozzle is rotatably arranged at the air outlet. The nozzle includes a side wall in a ring structure and an end face arranged at one axial end of the side wall. A plurality of spray holes arranged in a matrix are provided on the end face, and a plurality of arc-shaped air guide grooves are provided on the outer side face surrounding the side wall. The air guide grooves are connected to the second air inlet;

[0008] The water outlet end of the water circulation mechanism is connected to the mist inlet of each medium adjustment unit through a water inlet pipe. The ultrasonic atomizer and the water pump are respectively arranged on the water inlet pipe. The nitrogen storage tank is connected to the first air inlet and the second air inlet through an air pipe. The air pump is arranged on the air pipe. The first switch valve and the second switch valve are respectively arranged at the first air inlet and the second air inlet.

[0009] The conveying mechanism, the ultrasonic atomizer, the air pump, the first switch valve, the second switch valve, the water pump, and the fan are respectively electrically connected to the control device.

[0010] Further, the control device includes a controller, an infrared thermometer arranged in the quenching tank, a humidity sensor arranged in the quenching tank, a liquid flow meter arranged on the water inlet pipe, a gas flow meter arranged on the air pipe, a pressure sensor arranged on the nozzle, and an image recognition unit. The infrared thermometer, the humidity sensor, the liquid flow meter, the gas flow meter, the pressure sensor, and the image recognition unit are respectively electrically connected to the controller.

[0011] Further, the housing includes a first housing, a second housing, a third housing, and an annular rotating cover. The second housing is threadedly connected to one axial end of the first housing. The mist inlet is arranged at the other axial end of the first housing. The first air inlet is arranged on the circumferential surface of the second housing. The third housing is clamped at the other axial end of the second housing and is locked by the annular rotating cover threadedly connected to the second housing. The second air inlet is arranged on the circumferential surface of the third housing. The air outlet is arranged at the axial end of the third housing far from the second housing. The nozzle is clamped at the air outlet.

[0012] Further, an extension part extends along the axial direction at the other axial end of the second housing. A gas guiding channel is formed between the extension part and the second housing. The gas guiding channel is communicated with the air cavity.

[0013] Further, an anti-backflow component for preventing the mist from flowing back from the mist inlet is arranged in the housing.

[0014] Further, the anti-backflow component is movably connected to the housing through a connecting frame.

[0015] Further, the anti-backflow component includes a mounting plate bolted to the connecting frame, a guide sleeve fixed on the mounting plate, a first air permeable hole arranged on the guide sleeve, a second air permeable hole arranged on the mounting plate and located on the circumferential side of the guide sleeve, an adjusting screw threadedly connected to the mounting plate, a top plate arranged on the adjusting screw, a spherical ball arranged in the guide sleeve, and a spring arranged between the spherical ball and the top plate. The central axis of the guide sleeve coincides with the central axis of the mist inlet.

[0016] By adopting the foregoing technical solution, the beneficial effects of the present invention are as follows: For the quenching control system for aluminum alloy profile extrusion production, the extruded aluminum alloy profile is conveyed into the quenching tank through the conveying mechanism. The ultrasonic atomizer is controlled by the control device to generate water mist, and the water mist is introduced into the atomization treatment mechanism. At the same time, the opening and closing of the air pump, the first switching valve, and the second switching valve are controlled, and the water mist, aerosol, and mixed mist modes can be switched. The atomization pressure, flow rate, and droplet size are adjusted in real time according to the profile temperature to cool the aluminum alloy profile, and then the fan is started to assist in temperature control to avoid surface supercooling of the profile, so that the quenching of the aluminum alloy profile is efficient, energy-saving, and highly controllable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a top view structural schematic diagram of an embodiment of the present invention;

[0018] Figure 2 is a cross-sectional structural schematic diagram of the quenching tank in an embodiment of the present invention;

[0019] Figure 3 is a front view structural schematic diagram of the medium adjustment unit in an embodiment of the present invention;

[0020] Figure 4 is a cross-sectional structural schematic diagram of the medium adjustment unit in an embodiment of the present invention;

[0021] Figure 5 is a three-dimensional structural schematic diagram of the nozzle in an embodiment of the present invention;

[0022] Figure 6 is a circuit module diagram of an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] An embodiment of the present invention is as follows:

[0025] Reference Figures 1 to 6As shown in the figure, a quenching control system for aluminum alloy profile extrusion production includes a frame, a control device 2, a conveying mechanism 1, a quenching tank 3, an atomization treatment mechanism 4, an ultrasonic atomizer 5, a water circulation mechanism 6, a nitrogen storage tank 7, an air pump 8, an air pipe 9, a first switch valve 10, a second switch valve 11, a water pump 12, a water inlet pipe 13, a water outlet pipe 14, and a blower 15. A quenching chamber 31 is provided inside the quenching tank 3. An inlet 32 and an outlet 33 communicating with the quenching chamber 31 are provided on the quenching tank 3. The conveying mechanism 1 passes through the quenching chamber 31 through the inlet 32 and the outlet 33 for conveying aluminum alloy profiles. Mounting frames 16 are provided around the quenching chamber 31. The atomization treatment mechanism 4 is provided on the mounting frames 16. A through hole 34 is provided at the top of the quenching tank 3. The blower 15 is provided at the through hole 34. A water storage tank 17 is provided at the bottom of the quenching tank 3. A drain port 18 communicating with the water storage tank 17 is provided on the quenching tank 3. The drain port 18 is connected to the water inlet end of the water circulation mechanism 6 through the water outlet pipe 14;

[0026] The atomization treatment mechanism 4 includes fourteen medium adjustment units 41 and nozzles 42 provided on each medium adjustment unit. The medium adjustment unit 41 includes a housing 411. An air chamber 412 is provided inside the housing 411. A mist inlet 413, a first air inlet 414, a second air inlet 415, and an air outlet 416 communicating with the air chamber 412 are provided on the housing 411. The nozzle 42 is rotatably provided at the air outlet 416. The nozzle 42 includes an annular side wall 421 and an end face 422 provided at one axial end of the side wall 421. Twenty-nine spray holes 423 distributed in a matrix are provided on the end face 422. Sixteen arc-shaped air guide grooves 424 are provided on the outer side surface of the side wall 421. The air guide grooves 424 are connected to the second air inlet 415;

[0027] The water outlet end of the water circulation mechanism 6 is connected to the mist inlets 413 of each medium adjustment unit 41 through the water inlet pipe 13. The ultrasonic atomizer 5 and the water pump 12 are respectively provided on the water inlet pipe 13. The nitrogen storage tank 7 is connected to the first air inlet 414 and the second air inlet 415 through the air pipe 9. The air pump 8 is provided on the air pipe 9. The first switch valve 10 and the second switch valve 11 are respectively provided at the first air inlet 414 and the second air inlet 415;

[0028] The conveying mechanism 1, the ultrasonic atomizer 5, the air pump 8, the first switch valve 10, the second switch valve 11, the water pump 12, and the blower 15 are respectively electrically connected to the control device 2.

[0029] This quenching control system for aluminum alloy profile extrusion production conveys the extruded aluminum alloy profile into the quenching tank 3 through the conveying mechanism 1. The ultrasonic atomizer 5 is controlled by the control device 2 to generate water mist, and the water mist is introduced into the atomization treatment mechanism 4. At the same time, the opening and closing of the air pump 8, the first switching valve 10 and the second switching valve 11 are controlled to switch the water mist, aerosol and mixed mist medium modes. The atomization pressure, flow rate and droplet size are adjusted in real time according to the profile temperature to cool the aluminum alloy profile. Then, the fan 15 is started to assist in temperature control to avoid surface supercooling of the profile, so that the quenching of the aluminum alloy profile is efficient, energy-saving and highly controllable. In addition, the nitrogen gas pumped into the second air inlet 415 acts on the arc-shaped air guide groove 424 of the nozzle 42, causing the nozzle 42 to rotate, which can improve the uniformity of the mist ejection and form an air hood at the same time, realizing the fixed-point spraying effect of the mist and improving the use effect.

[0030] Specifically, the control device 2 includes a controller 21, an infrared thermometer 22 arranged in the quenching tank 3, a humidity sensor 23 arranged in the quenching tank 3, a liquid flowmeter 24 arranged on the water inlet pipe 13, a gas flowmeter 25 arranged on the air pipe 9, a pressure sensor 26 arranged on the nozzle 42, and an image recognition unit 27. The infrared thermometer 22, the humidity sensor 23, the liquid flowmeter 24, the gas flowmeter 25, the pressure sensor 26 and the image recognition unit 27 are respectively electrically connected to the controller 21;

[0031] The control method of the control device includes the following steps:

[0032] I. Initial stage (T = 500 °C):

[0033] 1. Turn on the high-pressure water mist (pressure 15 MPa, particle size 80 μm) to cover the entire surface of the aluminum alloy profile;

[0034] 2. The nitrogen mixing ratio is 20% to prevent the formation of oxide scale;

[0035] II. Extreme cooling stage (T = 500 °C to 200 °C, duration 8 s):

[0036] 3. Collect the temperature every 2 seconds, and dynamically increase the pressure to 18 MPa by the PID algorithm, and reduce the droplet size to 60 μm;

[0037] 4. Divide the quenching box body 3 into 6 longitudinal control areas. If the local temperature deviation > 30 °C, trigger the addition of 2 groups of nozzles 42 in this area;

[0038] III. Slow cooling section (T = 200 °C to 50 °C, duration 15 s):

[0039] 5. Switch to the ultrasonic atomizer 5 (frequency 50 kHz, particle size 25 μm), and start the fan 15 (wind speed 3 m / s) synchronously;

[0040] 6. After confirming no deformation through the image recognition unit 27, enter the natural cooling area.

[0041] PID algorithm control:

[0042] Input variables: temperature deviation (ΔT), temperature change rate (dT / dt), humidity deviation (ΔH); output variables: pressure of the spray head 42, medium flow rate, set value of droplet size;

[0043] Example of dynamic adjustment formula:

[0044]

[0045] Among them, e(t) = T(target) - T(actual), and the coefficients Kp, Ki, Kd are adaptively adjusted according to the quenching stage;

[0046] Medium switching logic:

[0047] When ΔT > 100 °C, start the high-pressure water mist + nitrogen mixing mode (water-nitrogen volume ratio 3:1), and use the inertness of nitrogen to prevent oxidation;

[0048] When ΔT ≤ 50 °C, switch to ultrasonic fine atomization (pure water mist, droplet size 20 - 50 μm) to reduce thermal stress;

[0049] Droplet size adjustment:

[0050] By adjusting the ultrasonic frequency (20 kHz - 100 kHz) and the nozzle aperture:

[0051]

[0052] Among them, d is the droplet size, σ is the liquid surface tension, ρ is the density, and f is the driving frequency.

[0053] In this embodiment, the housing 411 includes a first housing 101, a second housing 102, a third housing 103, and an annular rotating cover 104. The second housing 102 is threadedly connected to one axial end of the first housing 101. The mist inlet 413 is provided at the other axial end of the first housing 101. The first air inlet 414 is provided on the circumferential surface of the second housing 102. The third housing 103 is clamped at the other axial end of the second housing 102 and is locked by the annular rotating cover 104 threadedly connected to the second housing 102. The second air inlet 415 is provided on the circumferential surface of the third housing 103. The air outlet 416 is provided at the axial end of the third housing 103 away from the second housing 102. The spray head 42 is clamped at the air outlet 416, which improves the maintenance convenience of the medium adjustment unit 41 and is convenient for the production of the housing 411.

[0054] Moreover, at the other axial end of the second housing 102, an extension portion 105 extends along its axial direction. An air guiding channel 106 is formed between the extension portion 105 and the second housing 102. The air guiding channel 106 communicates with the air cavity 412, reducing the influence of the nitrogen pumped in on the flow of the fog in the air cavity 412.

[0055] Furthermore, an anti-backflow assembly 20 for preventing the fog from flowing back from the fog inlet 413 is provided in the housing 411. The anti-backflow assembly 20 is movably connected to the housing 411 through a connecting frame 107. The anti-backflow assembly 20 includes a mounting plate 202 locked to the connecting frame 107 by a bolt 201, a guide sleeve 203 fixed to the mounting plate 202, a first air-permeable hole 204 provided on the guide sleeve 203, a second air-permeable hole 205 provided on the mounting plate 202 and located on the circumferential side of the guide sleeve 203, an adjusting screw 206 threadedly connected to the mounting plate 202, a top plate 207 provided on the adjusting screw 206, a spherical ball 208 provided in the guide sleeve 203, and a spring 209 provided between the spherical ball 208 and the top plate 207. The central axis of the guide sleeve 203 coincides with the central axis of the fog inlet 413. By rotating the adjusting screw 206, the compression stroke of the spring 209 is adjusted, so that the pressure of the fog inlet 413 is adjusted, thereby ensuring the stability of the pressure in the air cavity 412. At the same time, fog backflow can be realized, improving the use effect.

[0056] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0057] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected with", "fixed" and other terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected, or indirectly connected through an intermediate medium. It may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present invention, unless otherwise expressly specified or limited, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intermediate medium. Further, a first feature being "above", "over" and "on top of" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher level of height than the second feature. A first feature being "under", "below" and "beneath" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level of height than the second feature.

[0059] Although the present invention has been specifically shown and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A quenching control system for aluminum alloy profile extrusion production, characterized in that: It includes a frame, a control device, a transmission mechanism, a quenching box, an atomizing treatment mechanism, an ultrasonic atomizer, a water circulation mechanism, a nitrogen storage tank, an air pump, an air pipe, a first switch valve, a second switch valve, a water pump, a water inlet pipe, a water outlet pipe and a fan. The quenching box has a quenching chamber, and the quenching box is provided with an inlet and an outlet connected to the quenching chamber. The transmission mechanism is penetrated in the quenching chamber through the inlet and the outlet for conveying aluminum alloy profiles. The quenching chamber is provided with a mounting frame around the quenching chamber, and the atomizing treatment mechanism is arranged on the mounting frame. The top of the quenching box is provided with a through hole, and the fan is arranged at the through hole. The bottom of the quenching box is provided with a water storage tank, and the quenching box is provided with a drain outlet connected to the water storage tank, and the drain outlet is connected to the water inlet end of the water circulation mechanism through the outlet pipe; The atomization processing mechanism includes a plurality of medium adjustment units and a nozzle disposed on each medium adjustment unit, the medium adjustment unit includes a shell, the shell has an air cavity, the shell is provided with a mist inlet, a first air inlet, a second air inlet and an air outlet connected to the air cavity, the nozzle is rotatably disposed at the air outlet, the nozzle includes a side wall with an annular structure and an end face disposed at one axial end of the side wall, the end face is provided with a plurality of jet holes distributed in a matrix, and a plurality of air guide grooves with an arc structure are provided on the outer side surface surrounding the side wall, and the air guide grooves are connected to the second air inlet; The water outlet of the water circulation mechanism is connected to the mist inlet of each medium regulating unit through a water inlet pipe, the ultrasonic atomizer and the water pump are respectively arranged on the water inlet pipe, the nitrogen storage tank is respectively connected to the first air inlet and the second air inlet through an air pipe, the air pump is arranged on the air pipe, and the first switch valve and the second switch valve are respectively arranged at the first air inlet and the second air inlet; The transmission mechanism, ultrasonic atomizer, air pump, first switch valve, second switch valve, water pump and fan are electrically connected to the control device respectively.

2. The quenching control system for aluminum alloy profile extrusion production according to claim 1 is characterized in that: The control device includes a controller, an infrared thermometer arranged in the quenching box, a humidity sensor arranged in the quenching box, a liquid flow meter arranged on the water inlet pipe, a gas flow meter arranged on the gas pipe, a pressure sensor arranged on the nozzle and an image recognition unit. The infrared thermometer, humidity sensor, liquid flow meter, gas flow meter, pressure sensor and image recognition unit are electrically connected to the controller respectively.

3. The quenching control system for aluminum alloy profile extrusion production according to claim 1 or 2, characterized in that: The shell includes a first shell, a second shell, a third shell and an annular rotating cover, the second shell is threadedly connected to one axial end of the first shell, the mist inlet is arranged at the other axial end of the first shell, the first air inlet is arranged on the circumferential surface of the second shell, the third shell is clamped on the other axial end of the second shell, and the third shell is threadedly connected to the second shell through the annular rotating cover to lock the third shell, the second air inlet is arranged on the circumferential surface of the third shell, the air outlet is arranged on the axial end of the third shell away from the second shell, and the nozzle is clamped at the air outlet.

4. The quenching control system for aluminum alloy profile extrusion production according to claim 3 is characterized in that: An extension portion is extended from the other axial end of the second shell along the axial direction thereof, and an air guide channel is formed between the extension portion and the second shell, and the air guide channel is communicated with the air cavity.

5. The quenching control system for aluminum alloy profile extrusion production according to claim 4 is characterized in that: An anti-backflow component is arranged in the shell to prevent mist from flowing back from the mist inlet.

6. The quenching control system for aluminum alloy profile extrusion production according to claim 5, characterized in that: The backflow prevention component is movably connected to the shell through a connecting frame.

7. The quenching control system for aluminum alloy profile extrusion production according to claim 6, characterized in that: The anti-backflow component includes a mounting plate fastened to the connecting frame by bolts, a guide sleeve fixed to the mounting plate, a first air hole provided on the guide sleeve, a second air hole provided on the mounting plate and located around the guide sleeve, an adjusting screw threadedly connected to the mounting plate, a top plate provided on the adjusting screw, a ball provided in the guide sleeve, and a spring provided between the ball and the top plate, wherein the central axis of the guide sleeve coincides with the central axis of the mist inlet.

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