Ultrahigh-strength steel quenching and strengthening cooling system

Abstract

The invention discloses an ultrahigh-strength steel quenching and strengthening cooling system which comprises a base, a vacuum adsorption structure, a cooling liquid pipeline and a plurality of nozzles. Wherein the upper side of the base is provided with a suspension unit for suspending a steel plate; each set of vacuum adsorption structure comprises a sliding unit and a suction cup, the two sliding units are arranged on the base in a sliding mode and can slide in the face-to-face direction and the back-to-back direction, and the suction cups are arranged on the corresponding sliding units; a cooling liquid pipeline is arranged on the inner side of the adsorption face of each suction cup, and the inlet end of each cooling liquid pipeline penetrates out of the corresponding suction cup and then is connected with an external cold source. A plurality of nozzles are uniformly arranged on each cooling liquid pipeline; in the cooling process, the two suction cups clamp the steel plate, the vacuum environment is formed between the suction cups and the steel plate, cooling water is not prone to being rapidly evaporated to form a steam film when making contact with the steel plate in the vacuum environment, the cooling water directly acts on the steel plate, and therefore the cooling system can evenly cool the steel plate in the cooling process.

Description

Technical Field

[0001] The invention belongs to the technical field of cooling devices, and in particular relates to an ultra-high strength steel quenching and strengthening cooling system. Background Art

[0002] Ultra-high-strength steel quenching and strengthening cooling is a material processing technology used to improve the hardness and strength of steel. Ultra-high-strength steel quenching and strengthening cooling technology is widely used in the automotive industry. Quenching is a heat treatment process that involves heating the steel to a certain temperature (austenizing temperature) and then rapidly cooling it to achieve hardening and strength improvement. Austenitization is the process of heating the steel to a high temperature (usually between 800°C and 1050°C, the specific temperature depends on the composition of the steel) to achieve an austenite state. Austenite is a face-centered cubic lattice structure with high toughness and plasticity, but low hardness. The austenitized steel is rapidly cooled, usually using water, oil or polymer solution as the cooling medium. Rapid cooling can inhibit the transformation of austenite to ferrite and pearlite, and promote the formation of hard and brittle phases such as martensite or bainite.

[0003] The existing ultra-high strength steel quenching and strengthening cooling system includes a quenching tank for containing cooling medium and performing quenching operations, a conveying system for transferring steel to the quenching tank, and a control system for automatically controlling the entire quenching process.

[0004] At present, when this ultra-high-strength steel quenching and strengthening cooling system is rapidly cooled, the temperature difference between the high-temperature steel plate and the cooling medium is very large. The cooling water will evaporate rapidly when it contacts the surface of the steel plate, forming a layer of vapor film; the vapor film, as an insulating layer, will hinder the direct contact between the cooling medium and the surface of the steel plate. Therefore, the existence of the vapor film will cause uneven cooling of the steel plate, thereby causing deformation or cracking of the steel plate. Summary of the invention

[0005] The purpose of the present invention is to provide an ultra-high strength steel quenching and strengthening cooling system to solve the problem that when the existing ultra-high strength steel quenching and strengthening cooling system rapidly cools the steel plate, the steel plate may be deformed or cracked due to the generation of a vapor film.

[0006] The technical solution adopted by the present invention is a super high strength steel quenching and strengthening cooling system, comprising:

[0007] A base, wherein a suspension unit for suspending the steel plate is arranged on the upper side of the base;

[0008] Two groups of vacuum adsorption structures, each group of vacuum adsorption structures includes a sliding unit and a suction cup, the two sliding units are slidably arranged on the base and the two sliding units can slide towards or away from each other, the suction cup is arranged on the corresponding sliding unit, and the adsorption surfaces of the two suction cups are arranged facing each other;

[0009] A coolant pipeline is provided on the inner side of the adsorption surface of each suction cup, and the inlet end of the coolant pipeline passes through the suction cup and is connected to an external cold source;

[0010] Multiple nozzles are evenly arranged on each coolant pipe;

[0011] When the steel plate to be cooled is placed between two suction cups, the suction cups and the steel plate are adsorbed so that there is a vacuum between the suction cups and the steel plate. In a vacuum environment, it is not easy for cooling water to form a vapor film.

[0012] Preferably, a mounting groove for mounting a coolant pipe is spirally arranged on the inner side of the adsorption surface of the suction cup, and the coolant pipe is spirally arranged in the mounting groove.

[0013] Preferably, the sliding unit includes a slider slidably connected to the base, a hollow sliding rod is vertically arranged on the upper side of the slider, a gas channel is arranged between the inner side of the sliding rod and the adsorption surface of the suction cup to connect the two, a piston is slidably arranged on the inner side of the sliding rod, and a piston rod connected to the piston is also arranged inside the sliding rod, and one end of the piston rod passes through the upper end surface of the sliding rod.

[0014] Preferably, a horizontal air guide pipe is provided inside the gas channel, and a one-way valve is provided on the air guide pipe.

[0015] Preferably, a valve capable of controlling the external cooling source from entering the cooling liquid pipeline is provided between the liquid outlet of the external cooling source and the liquid inlet of the cooling liquid pipeline.

[0016] Preferably, the valve includes a butterfly valve arranged between the liquid outlet of the external cold source and the coolant pipeline, the butterfly valve includes a valve sleeve, a valve stem and a butterfly plate, the valve sleeve is connected between the liquid outlet of the external cold source and the liquid inlet of the coolant pipeline, the butterfly plate is rotatably arranged on the inner side of the valve sleeve, one end of the valve stem is connected to the butterfly plate, and the other end of the valve stem passes through the valve sleeve, and a transmission assembly is also arranged between the valve stem and the end of the piston rod, which can drive the valve stem to rotate a certain angle when the piston rod slides.

[0017] Preferably, the transmission assembly includes a rotating disk connected to the end of the valve stem, and also includes a first connecting rod hinged to one end of the piston rod, and the other end of the first connecting rod is hinged to the rotating disk.

[0018] Preferably, the base is also provided with a driving assembly that can drive the two sliders to slide simultaneously, and the driving assembly includes a motor arranged on the inner side of the base, and the output shaft of the motor is vertically upward and passes through the upper side wall of the base, and a crank is arranged on the output shaft of the motor, and two second connecting rods arranged oppositely are hinged on the crank, and the ends of the second connecting rods away from the crank are respectively hinged to the sliders.

[0019] The beneficial effects of the present invention are:

[0020] The present invention discloses an ultra-high strength steel quenching and strengthening cooling system, in which a baffle to be cooled is suspended between the suction cup surfaces of two suction cups by a suspension unit, and then the two suction cups are brought close to each other by a sliding unit so that the suction cups are respectively adsorbed on the two surfaces of the middle steel plate, and after the two suction cups are tightly adsorbed on the two surfaces of the steel plate, a vacuum environment is formed between the suction cups and the steel plate, and then the coolant is sprayed on the surface of the steel plate for cooling through a coolant pipe and a nozzle. At this time, because there is a vacuum environment between the suction cup and the steel plate, the pressure between the suction cup and the steel plate in the vacuum environment is extremely high, and the vapor pressure generated by water when evaporating at this time will be lower than the pressure of the surrounding environment, and the gas molecules in the vacuum environment are thin, and heat transfer is mainly through radiation and convection (rather than traditional convection), which reduces the evaporation rate of water; therefore, it is not easy for the cooling water to evaporate quickly to form a vapor film when it contacts the steel plate; in summary, the cooling system disclosed in the present invention can avoid the generation of a large amount of vapor film when cooling the steel plate, so the cooling water can directly contact the surface of the steel plate, and therefore the ultra-high strength steel quenching and strengthening cooling system disclosed in the present invention can achieve uniform cooling when cooling the steel plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a front view of a super high strength steel quenching and strengthening cooling system of the present invention;

[0022] Figure 2 It is a schematic diagram of the adsorption surface of the upper suction cup of the ultra-high strength steel quenching and strengthening cooling system of the present invention;

[0023] Figure 3 It is a schematic diagram of a driving component on a super high strength steel quenching and strengthening cooling system of the present invention;

[0024] Figure 4 It is a structural schematic diagram of a butterfly valve on an ultra-high strength steel quenching and strengthening cooling system of the present invention;

[0025] Figure 5 It is a structural schematic diagram of a butterfly valve stem and a piston rod on an ultra-high strength steel quenching and strengthening cooling system of the present invention.

[0026] In the figure, 1. base; 2. slider; 3. suction cup; 4. coolant pipe; 5. nozzle; 6. slide rod; 7. piston; 8. piston rod; 9. air guide tube; 10. motor; 11. crank; 12. second connecting rod; 13. suspension unit; 14. valve stem; 15. butterfly plate; 16. valve sleeve; 17. first connecting rod; 18. rotating disk. DETAILED DESCRIPTION

[0027] The present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection solution of the present invention.

[0028] Ultra-high strength steel quenching and strengthening cooling is a material processing technology used to improve the hardness and strength of steel. Ultra-high strength steel quenching and strengthening cooling technology is widely used in the automotive industry, aerospace industry, military industry and engineering machinery. Quenching is a heat treatment process that involves heating the steel to a certain temperature (austenitizing temperature) and then rapidly cooling it to achieve hardening and strength improvement. Austenitization is the process of heating the steel to a high temperature (usually between 800°C and 1050°C, the specific temperature depends on the composition of the steel) to achieve an austenite state. Austenite is a face-centered cubic lattice structure with high toughness and plasticity, but low hardness. The austenitized steel is rapidly cooled, usually using water, oil or polymer solution as the cooling medium. Rapid cooling can inhibit the transformation of austenite to ferrite and pearlite, and promote the formation of hard and brittle phases such as martensite or bainite.

[0029] The existing ultra-high strength steel quenching and strengthening cooling system includes a quenching tank for containing cooling medium and performing quenching operations, a conveying system for transferring steel to the quenching tank, and a control system for automatically controlling the entire quenching process.

[0030] At present, when this ultra-high-strength steel quenching and strengthening cooling system is rapidly cooled, the temperature difference between the high-temperature steel plate and the cooling medium is very large. The cooling water will evaporate rapidly when it contacts the surface of the steel plate, forming a layer of vapor film; the vapor film, as an insulating layer, will hinder the direct contact between the cooling medium and the surface of the steel plate. Therefore, the existence of the vapor film will cause uneven cooling of the steel plate, thereby causing deformation or cracking of the steel plate.

[0031] The present invention discloses a super high strength steel quenching and strengthening cooling system, such as Figure 1-3 As shown, it includes: a base 1, two groups of vacuum adsorption structures, a coolant pipeline 4 and a plurality of nozzles 5; wherein a suspension unit 13 for suspending a steel plate is arranged on the upper side of the base 1; two sliding units are both slidably arranged on the base 1 and the two sliding units can slide toward or away from each other, and the suction cups 3 are arranged on the corresponding sliding units, and the adsorption surfaces of the two suction cups 3 are arranged facing each other; a coolant pipeline 4 is arranged on the inner side of the adsorption surface of each suction cup 3, and the inlet end of the coolant pipeline 4 passes through the suction cup 3 and is connected to an external cold source; and a plurality of nozzles 5 are evenly arranged on each coolant pipeline 4.

[0032] Therefore, when cooling a steel plate, the ultra-high strength steel quenching and strengthening cooling system disclosed in the present invention suspends the baffle to be cooled between the suction cup surfaces of the two suction cups 3 through the suspension unit 13, and then the two suction cups 3 are brought close to each other through the sliding unit so that the suction cups 3 are respectively adsorbed to the two surfaces of the middle steel plate. After the two suction cups 3 are tightly adsorbed to the two surfaces of the steel plate, a vacuum environment is formed between the suction cups 3 and the steel plate. Then, when cooling is performed through the coolant pipe 4 and the nozzle 5, the coolant is sprayed on the surface of the steel plate 3 for cooling. At this time, because there is a vacuum environment between the suction cups 3 and the steel plate, the suction under the vacuum environment is The pressure level between the disk 3 and the steel plate is low. At this time, the vapor pressure generated by water when evaporating will be lower than the pressure of the surrounding environment, and the gas molecules are thin in a vacuum environment. Heat transfer is mainly through radiation and convection (rather than traditional convection), which reduces the evaporation rate of water; therefore, it is not easy for the cooling water to evaporate quickly and form a vapor film when it contacts the steel plate; in summary, the cooling system disclosed in the present invention can avoid the generation of a large amount of vapor film when cooling the steel plate, so the cooling water can directly contact the surface of the steel plate, so the ultra-high strength steel quenching and strengthening cooling system disclosed in the present invention can achieve uniform cooling when cooling the steel plate.

[0033] In order to form an effective vacuum environment between the suction cup 3 and the steel plate, the suction surface of the suction cup 3 disclosed in this embodiment is spirally provided with an installation groove for installing the coolant pipe 4, and the coolant pipe 4 is spirally arranged in the installation groove. Such installation of the coolant pipe 4 can avoid the normal adsorption of the suction cup and the steel plate, so that a vacuum environment can be quickly formed between the suction cup 3 and the steel plate. And therefore, a plurality of nozzles 5 are arranged on the spirally arranged coolant pipe 4, so that uniform cooling of the steel plate can be achieved.

[0034] Specifically, in order to facilitate the control of the process of forming a vacuum environment, the sliding unit disclosed in this embodiment includes a slider 2 that is slidably connected to the base 1, and a hollow slide rod 6 is vertically arranged on the upper side of the slider 2. A gas channel that enables the two to communicate is arranged between the inner side of the slide rod 6 and the adsorption surface of the suction cup 3, and a piston 7 is slidably arranged on the inner side of the slide rod 6. A piston rod 8 connected to the piston 7 is also arranged inside the slide rod 6, and one end of the piston rod 8 passes through the upper end surface of the slide rod 6. When the suction cup 3 contacts the surface of the steel plate, the piston rod 8 can be pulled to slide outward, and then the volume of the working chamber inside the slide rod 6 can be increased. At this time, the excess air between the suction cup 3 and the steel plate enters the inner side of the working chamber, and then the suction cup 3 and the steel plate are almost in a vacuum environment, and the two suction cups 3 and the steel plate 3 are tightly adsorbed.

[0035] Furthermore, a horizontal air guide pipe 9 is arranged inside the gas channel, and a one-way valve is arranged on the air guide pipe 9. The one-way valve can prevent the gas in the working chamber from flowing into between the suction cup 3 and the steel plate. Under the action of the one-way valve, only the gas between the suction cup 3 and the steel plate can enter the working chamber.

[0036] A valve that can control the external cooling source to enter the cooling liquid pipeline 4 is provided between the liquid outlet of the external cooling source and the liquid inlet of the cooling liquid pipeline 4. Therefore, the cooling process can be controlled by the valve, and cooling can only be performed when there is an effective vacuum between the suction cup 3 and the steel plate and it is completely adsorbed.

[0037] The specific valve includes a butterfly valve disposed between the liquid outlet of the external cold source and the coolant pipe 4, the butterfly valve includes a valve sleeve 16, a valve stem 14 and a butterfly plate 15, the valve sleeve 16 is connected between the liquid outlet of the external cold source and the liquid inlet of the coolant pipe 4, the butterfly plate 15 is rotatably disposed inside the valve sleeve 16, one end of the valve stem 14 is connected to the butterfly plate 15, the other end of the valve stem 14 passes through the valve sleeve 16, and a transmission component is also disposed between the valve stem 14 and the end of the piston rod 8, which can drive the valve stem 14 to rotate a certain angle when the piston rod 8 slides. In this way, it can be ensured that the valve can be opened for cooling only when the suction cup 3 is in close contact with the steel plate.

[0038] The specific transmission assembly includes a rotating disk 18 connected to the end of the valve stem 14, and also includes a first connecting rod 17 hinged at one end of the piston rod 8. The other end of the first connecting rod 17 is hinged to the rotating disk 18. Therefore, when the piston rod 8 is pulled to move outward, the first connecting rod 17 hinged to the piston rod can be driven to move, thereby driving the rotating disk 18 to rotate a certain angle through the first connecting rod 17, and finally driving the valve stem 14 and the butterfly plate 15 to rotate a certain angle through the rotating disk 18. After that, the butterfly plate 15 rotates a certain angle to open the valve, so that the cooling water of the external cold source enters the coolant pipe 4, and finally the cooling water is sprayed out from the nozzle 5 on the coolant pipe 4.

[0039] Furthermore, the base 1 is also provided with a driving assembly that can drive the two sliders 2 to slide simultaneously, and the driving assembly includes a motor 10 arranged inside the base 1, the output shaft of the motor 10 is vertically upward and passes through the upper side wall of the base 1, and a crank 11 is arranged on the output shaft of the motor 10, and two second connecting rods 12 arranged opposite to each other are hinged on the crank 11, and the ends of the second connecting rods 12 away from the crank 11 are respectively connected to the sliders 2, and the motor is connected to the control system. Therefore, when the motor 10 rotates, the crank 11 is driven to rotate, thereby driving the two second connecting rods 12 to slide, so that the sliders 2 connected to the two second connecting rods 12 can move toward or away from each other, so that the two suction cups can initially clamp the steel plate.

[0040] Therefore, when cooling a steel plate, the ultra-high-strength steel quenching and strengthening cooling system disclosed in the present invention suspends the baffle to be cooled between the suction cup surfaces of the two suction cups 3 through the suspension unit 13, and then the two suction cups 3 are brought close to each other through the sliding unit so that the suction cups 3 are respectively adsorbed to the two surfaces of the middle steel plate. When the suction cups 3 are adsorbed to the two surfaces of the steel plate, the piston rod 8 can be pulled to further squeeze out the excess air between the suction cups 3 and the steel plate. After that, the two suction cups 3 are tightly adsorbed to the two surfaces of the steel plate, and a vacuum environment is formed between the suction cups 3 and the steel plate. In this way, when cooling is performed through the coolant pipe 4 and the nozzle 5, the coolant is sprayed on the surface of the steel plate 3 for cooling. Because there is a vacuum environment between the suction cup 3 and the steel plate, the pressure between the suction cup 3 and the steel plate in the vacuum environment is extremely low. At this time, the vapor pressure generated by water when evaporating will be lower than the pressure of the surrounding environment, and the gas molecules in the vacuum environment are thin, and heat transfer is mainly through radiation and convection (rather than traditional convection), which reduces the evaporation rate of water; therefore, it is not easy for the cooling water to evaporate quickly to form a vapor film when it contacts the steel plate; in summary, the cooling system disclosed in the present invention can avoid the generation of a large amount of vapor film when cooling the steel plate, so the cooling water can directly contact the surface of the steel plate, so the ultra-high strength steel quenching and strengthening cooling system disclosed in the present invention can achieve uniform cooling when cooling the steel plate.

[0041] The embodiments described above are only preferred specific implementation methods of the present invention, and the protection scope of the present invention is not limited thereto. Any simple changes or equivalent replacements of the technical solutions that can be obviously obtained by any technician familiar with the field within the technical scope disclosed in the present invention belong to the protection scope of the present invention.

Claims

1. An ultra-high strength steel quenching and strengthening cooling system, characterized in that: include: A base (1), wherein a suspension unit (13) for suspending a steel plate is provided on the upper side of the base (1); Two groups of vacuum adsorption structures, each group of the vacuum adsorption structures comprises a sliding unit and a suction cup (3), the two sliding units are slidably arranged on the base (1) and the two sliding units can slide towards or away from each other, the suction cup (3) is arranged on the corresponding sliding unit, and the adsorption surfaces of the two suction cups (3) are arranged facing each other; A cooling liquid pipeline (4), wherein the cooling liquid pipeline (4) is arranged on the inner side of the adsorption surface of each suction cup (3), and the inlet end of the cooling liquid pipeline (4) passes through the suction cup (3) and is connected to an external cooling source; A plurality of nozzles (5) are evenly arranged on each of the coolant pipes (4); When a steel plate to be cooled is placed between the two suction cups (3), the suction cups (3) adsorb the steel plate so that a vacuum exists between the suction cups (3) and the steel plate, and cooling water is not easy to form a vapor film under the vacuum environment.

2. The ultra-high strength steel quenching and strengthening cooling system according to claim 1, characterized in that: An installation groove for installing the coolant pipe (4) is spirally arranged on the inner side of the adsorption surface of the suction cup (3), and the coolant pipe (4) is spirally arranged in the installation groove.

3. The ultra-high strength steel quenching and strengthening cooling system according to claim 1, characterized in that: The sliding unit comprises a sliding block (2) slidably connected to a base (1); a hollow sliding rod (6) is vertically arranged on the upper side of the sliding block (2); a gas passage is arranged between the inner side of the sliding rod (6) and the adsorption surface of the suction cup (3) so as to connect the two; a piston (7) is slidably arranged on the inner side of the sliding rod (6); a piston rod (8) connected to the piston (7) is arranged inside the sliding rod (6); one end of the piston rod (8) passes through the upper end surface of the sliding rod (6).

4. The ultra-high strength steel quenching and strengthening cooling system according to claim 3, characterized in that: A horizontal air guide pipe (9) is arranged inside the gas channel, and a one-way valve is arranged on the air guide pipe (9).

5. The ultra-high strength steel quenching and strengthening cooling system according to claim 3, characterized in that: A valve capable of controlling the external cooling source to enter the cooling liquid pipeline (4) is provided between the liquid outlet of the external cooling source and the liquid inlet of the cooling liquid pipeline (4).

6. The ultra-high strength steel quenching and strengthening cooling system according to claim 5, characterized in that: The valve comprises a butterfly valve arranged between the liquid outlet of the external cold source and the coolant pipeline (4), the butterfly valve comprising a valve sleeve (16), a valve stem (14) and a butterfly plate (15), the valve sleeve (16) being connected between the liquid outlet of the external cold source and the liquid inlet of the coolant pipeline (4), the butterfly plate (15) being rotatably arranged inside the valve sleeve (16), one end of the valve stem (14) being connected to the butterfly plate (15), the other end of the valve stem (14) passing through the valve sleeve (16), and a transmission component being further arranged between the valve stem (14) and the end of the piston rod (8), so that when the piston rod (8) slides, the valve stem (14) can be driven to rotate by a certain angle.

7. The ultra-high strength steel quenching and strengthening cooling system according to claim 6, characterized in that: The transmission assembly comprises a rotating disk (18) connected to the end of the valve stem (14), and also comprises a first connecting rod (17) hinged to one end of the piston rod (8), the other end of the first connecting rod (17) being hinged to the rotating disk (18).

8. The ultra-high strength steel quenching and strengthening cooling system according to claim 3, characterized in that: The base (1) is also provided with a driving assembly capable of driving the two sliders (2) to slide simultaneously, the driving assembly comprising a motor (10) arranged on the inner side of the base (1), the output shaft of the motor (10) vertically upward and passing through the upper side wall of the base (1), the output shaft of the motor (10) is provided with a crank (11), the crank (11) is hinged with two second connecting rods (12) arranged opposite to each other, and the ends of the second connecting rods (12) away from the crank (11) are respectively hinged with the sliders (2).

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