Gantry profile steel production optimization and surface quality improvement process

Abstract

The invention relates to the technical field of portal profile steel processing, in particular to a portal profile steel production optimization and surface quality improvement process which comprises the following steps: cleaning the outer surface of a material, checking equipment, starting a hydraulic machine, setting the hydraulic machine to specified working parameters, heating the material, and carrying out surface quality improvement. And when the temperature controller detects that the temperature of the material reaches a set value, the bending program is started, the material is bent, after bending is completed, the descaling mechanism is started immediately, descaling is conducted again, surface inspection is conducted on the portal section steel formed after bending, portal section steel production is completed, and by finely optimizing parameters of the oil pressure bending technology, the production efficiency is improved. And the residual stress in the material is reduced, so that the forming probability of surface scratches and pits is reduced, the durability and attractiveness of the product are improved, the descaling procedure is added, the surface cleanliness is improved, and the risk of environmental pollution is reduced.

Description

Technical Field

[0001] The invention relates to the field of portal frame steel processing, and in particular to a process for optimizing portal frame steel production and improving surface quality. Background Art

[0002] At present, when gantry steel is produced and processed, the plate needs to be rough-rolled and finish-rolled first, and then bent to form the gantry steel. During the processing, although descaling is performed in the rough-rolling and finish-rolling steps to remove the iron oxide sheets or impurities generated during the plate processing, there are still surface quality problems after bending, such as iron oxide sheet pressing in, steel sticking, etc., which seriously affect the product quality and user experience. In addition, when bending, it will cause large residual stress inside the plate, affecting the durability and aesthetics of the product. Summary of the invention

[0003] In order to make up for the deficiencies of the prior art and solve at least one of the problems raised in the background technology, a process for optimizing the production of portal steel and improving the surface quality is proposed.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a process for optimizing the production of portal steel and improving the surface quality, the process comprising the following steps: S1: Clean the outer surface of the material.

[0005] S2: Check whether all mechanical equipment is in good condition, then start the hydraulic press and set it to the specified working parameters.

[0006] S3: Heat the material and start the bending program when the temperature controller detects that the material temperature reaches the set value.

[0007] S4: The material is bent and the pressing time is controlled between 8s and 10s.

[0008] S5: After the bending is completed, the descaling mechanism is immediately started to perform high-pressure water jet descaling, and the surface of the bent steel is fully rinsed and descaled again.

[0009] S6: Perform surface inspection on the portal steel section formed after bending to complete the portal steel section production.

[0010] Preferably, in step S1, when cleaning the surface of the material, soap solution is used for cleaning, and after cleaning, air drying is performed. Before the surface of the material is cleaned, the material used is processed by a roughing mill and a finishing mill, and between the roughing mill and the finishing mill, two descaling operations are performed, the two descaling operations are performed before the roughing mill performs rough rolling and before the finishing mill performs finish rolling, respectively, and the iron oxide flakes or impurities generated when the material is heated and after rough rolling by the roughing mill are descaled to improve the surface quality.

[0011] Preferably, in step S2, when setting the working parameters of the hydraulic press, the pressure value of the equipment is set to between 200MPa and 270MPa, which can effectively reduce the internal stress of the material, thereby reducing the probability of surface scratches and pits. Experimental data show that the incidence of surface quality problems is reduced by about 5% with the optimized parameters.

[0012] Preferably, in step S3, the material is heated to between 180°C and 220°C, and after the temperature is stabilized, it is pressed to reduce the residual stress inside the material during the bending process and improve the durability of the product.

[0013] Preferably, in step S5, the descaling mechanism sprays water on both sides of the bent steel, and the descaling mechanism is composed of a water spray assembly, a high-pressure water pump and a control system. The water spray assembly is integrated into the existing bending device production line, and the high-pressure water pump supplies water to the water spray assembly. The control system regulates the water spray assembly and the high-pressure water pump. The pressure of the high-pressure water sprayed by the water spray assembly is between 18MPa and 22MPa, and the surface of the steel passing through is fully rinsed. Due to the use of a higher pressure than the first and second descaling, even tiny oxides can be completely removed to ensure that the surface of the steel is smooth and flat. And this series of operations are uniformly dispatched by the PLC controller, with a high degree of automation, reducing interference from human factors.

[0014] Preferably, the water spray assembly includes a mounting piece, and a water spray mechanism for spraying water to descale both sides of the material is slidably mounted on the upper and lower ends of the mounting piece respectively, and a bidirectional lead screw is vertically rotatably mounted inside the mounting piece, and the end of the water spray mechanism is threadedly connected to the bidirectional lead screw. The mounting piece facilitates the installation of the water spray assembly on a production line used for processing, and a slide groove for slidingly mounting the water spray mechanism is provided on the mounting piece, and the bidirectional lead screw is rotatably mounted inside the slide groove.

[0015] Preferably, the water spray mechanism includes a water spray pipe, both ends of the water spray pipe are fixedly installed with end caps, and one side of the end cap is fixedly installed with a slider, the slider is slidably clamped on the mounting member, the slider is threadedly connected to the bidirectional lead screw, one end of the water spray pipe is fixedly installed with a steel wire hose connected to the high-pressure water pump, one side of the water spray pipe is rotatably installed with a rotating sprocket in an array, the lower end of the rotating sprocket is fixedly installed with a water deflection disk, and one side of the lower end of the water deflection disk is fixedly installed with a spray head, the spray head is connected to the water spray pipe through the water deflection disk and the rotating sprocket, and through the slider and the bidirectional lead screw, It is convenient to adjust the distance between the water spray mechanisms on the upper and lower sides, so as to facilitate water spraying and descaling operations for different gantry steel sections, and a hand wheel is fixedly installed at the end of the bidirectional screw to facilitate driving the bidirectional screw, and through the steel wire hose, it is convenient to supply high-pressure water to the inside of the water spray pipe, and through the rotating sprocket and the water deflection plate, water is supplied to the nozzle to spray out high-pressure water, and the rotating sprocket is rotatably connected to the water spray pipe through a hollow sealed bearing, and the water deflection plate is fixedly connected to the rotating sprocket, so that the rotating sprocket drives the water deflection plate to rotate, thereby improving the descaling effect.

[0016] Preferably, a driving motor is fixedly mounted on the end head at one end, a driving sprocket is fixedly mounted on the output end of the driving motor, and a guide sprocket is rotatably mounted on the end head at the other end. An internal tooth chain is sleeved between the driving sprocket, the guide sprocket and the rotating sprocket. The driving motor drives the driving sprocket to rotate, and the rotating sprocket is rotated through the internal tooth chain, so that the nozzle runs in a circle along the rotating sprocket, and the ejected high-pressure water flow is in a spiral state, thereby improving the descaling range and descaling effect.

[0017] Preferably, a threaded pipe is fixedly installed on the water deflection plate at the position of the nozzle, and a sealing plug is threadedly connected to the threaded pipe. The sealing plug seals the nozzle. Through the threaded pipe and the sealing plug, the nozzles at both ends can be sealed according to the width of the portal steel. It has strong applicability and is convenient for adjusting the water spray range according to portal steels of different widths.

[0018] In summary, the beneficial effects of the present invention are as follows: 1. The present invention reduces the residual stress inside the material by finely optimizing the parameters of the hydraulic bending process, thereby reducing the probability of surface scratches and pits, and improving the durability and aesthetics of the product.

[0019] 2. By adding the subsequent descaling process, not only the surface cleanliness is improved, but also the risk of environmental pollution is reduced. The iron oxide flakes and other impurities on the surface of the steel are effectively removed, which significantly improves the surface cleanliness of the portal steel.

[0020] 3. By adopting the internal gear sprocket and the water deflection plate, during the third descaling process, the nozzle is operated in a rotating state, and the high-pressure water is sprayed onto the steel surface in a spiral state, which further improves the descaling effect on the steel surface and improves the cleanliness. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a process flow chart of the present invention.

[0022] Figure 2 It is a structural schematic diagram of the descaling mechanism in the present invention.

[0023] Figure 3 It is a schematic structural diagram of the descaling mechanism of the present invention without the mounting parts.

[0024] Figure 4 It is a structural schematic diagram of a partially enlarged descaling mechanism in the present invention.

[0025] Figure 5 It is a structural schematic diagram of the water spraying mechanism in the descaling mechanism of the present invention.

[0026] Figure 6 It is a schematic diagram of the structure after the sealing plug at the nozzle position in the descaling mechanism of the present invention is detached.

[0027] Description of reference numerals: 1. Mounting parts; 2. Water spraying mechanism; 3. Bidirectional screw; 21. Water spraying pipe; 22. End; 23. Sliding block; 24. Steel hose; 25. Rotating sprocket; 26. Water deflection plate; 27. Sprinkler; 28. Driving motor; 29. ​​Driving sprocket; 210. Guide sprocket; 211. Internal tooth chain; 212. Threaded pipe; 213. Sealing plug. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Specific examples are given below.

[0030] Embodiment 1 like Figure 1 As shown, the present invention provides a process for optimizing the production of portal steel and improving the surface quality, the process comprising the following steps: S1: The outer surface of the material is cleaned with soap solution, and after cleaning, it is air-dried. Before the surface of the material is cleaned, the material is processed by a roughing mill and a finishing mill, and descaling is performed twice between the roughing mill and the finishing mill.

[0031] S2: Check whether all mechanical equipment is in good condition, then start the hydraulic press and set it to the specified working parameters. The pressure value of the equipment is set to 200MPa.

[0032] S3: Heat the material to 180°C. After the temperature stabilizes and the temperature controller detects that the material temperature reaches the set value, the bending program is started.

[0033] S4: The material is bent and the pressing time is controlled within 8s.

[0034] S5: After the bending is completed, the descaling mechanism is immediately started to perform high-pressure water jet descaling, and the surface of the bent steel is fully rinsed and descaled again. The descaling mechanism sprays water on both sides of the bent steel, and the descaling mechanism is composed of a water spray component, a high-pressure water pump and a control system. The high-pressure water pressure sprayed by the water spray component is between 18MPa.

[0035] S6: Perform surface inspection on the portal steel section formed after bending to complete the portal steel section production.

[0036] Embodiment 2 like Figure 1 As shown, the present invention provides a process for optimizing the production of portal steel and improving the surface quality, the process comprising the following steps: S1: The outer surface of the material is cleaned with soap solution, and after cleaning, it is air-dried. Before the surface of the material is cleaned, the material is processed by a roughing mill and a finishing mill, and descaling is performed twice between the roughing mill and the finishing mill.

[0037] S2: Check whether all mechanical equipment is in good condition, then start the hydraulic press and set it to the specified working parameters. The pressure value of the equipment is set to 250MPa.

[0038] S3: Heat the material to 200°C. After the temperature stabilizes and the temperature controller detects that the material temperature reaches the set value, start the bending program.

[0039] S4: The material is bent and the pressing time is controlled within 9s.

[0040] S5: After the bending is completed, the descaling mechanism is immediately started to perform high-pressure water jet descaling, and the surface of the bent steel is fully rinsed and descaled again. The descaling mechanism sprays water on both sides of the bent steel, and the descaling mechanism is composed of a water spray component, a high-pressure water pump and a control system. The high-pressure water pressure sprayed by the water spray component is 20MPa.

[0041] S6: Perform surface inspection on the portal steel section formed after bending to complete the portal steel section production.

[0042] Embodiment 3 like Figure 1 As shown, the present invention provides a process for optimizing the production of portal steel and improving the surface quality, the process comprising the following steps: S1: The outer surface of the material is cleaned with soap solution, and after cleaning, it is air-dried. Before the surface of the material is cleaned, the material is processed by a roughing mill and a finishing mill, and descaling is performed twice between the roughing mill and the finishing mill.

[0043] S2: Check whether all mechanical equipment is in good condition, then start the hydraulic press and set it to the specified working parameters. The pressure value of the equipment is set to 270MPa.

[0044] S3: Heat the material to 220°C. After the temperature stabilizes and the temperature controller detects that the material temperature reaches the set value, the bending program is started.

[0045] S4: The material is bent and the pressing time is controlled within 10s.

[0046] S5: After the bending is completed, the descaling mechanism is immediately started to perform high-pressure water jet descaling, and the surface of the bent steel is fully rinsed and descaled again. The descaling mechanism sprays water on both sides of the bent steel, and the descaling mechanism is composed of a water spray component, a high-pressure water pump and a control system. The high-pressure water pressure sprayed by the water spray component is 22MPa.

[0047] S6: Perform surface inspection on the portal steel section formed after bending to complete the portal steel section production.

[0048] In Examples 1 to 3, the portal steel sections produced by processing steel materials can effectively reduce the internal stress of the material, thereby reducing the probability of surface scratches and pits, and achieving quality control in the portal steel section production process. Experimental data show that the incidence of surface quality problems is reduced by about 5% by using optimized parameters.

[0049] like Figure 2As shown, the water spray assembly includes a mounting part 1, which is convenient for installation on the production line. A water spray mechanism 2 for spraying water to descale the two sides of the material is slidably installed at the upper and lower ends of the mounting part 1, respectively. A bidirectional lead screw 3 is vertically rotated inside the mounting part 1, and the end of the water spray mechanism 2 is threadedly connected to the bidirectional lead screw 3. The distance between the water spray mechanisms 2 on the upper and lower sides is adjusted by the bidirectional lead screw 3, which is convenient for descaling of portal frame steels of different heights. During descaling, the water spray mechanism 2 sprays high-pressure water to wash the surface of the portal frame steel.

[0050] like Figure 2 and Figure 3 As shown, the water spray mechanism 2 includes a water spray pipe 21, both ends of the water spray pipe 21 are fixedly installed with end caps 22, and one side of the end cap 22 is fixedly installed with a slider 23, the slider 23 is slidably connected to the mounting member 1, the slider 23 is threadedly connected with the bidirectional lead screw 3, one end of the water spray pipe 21 is fixedly installed with a steel wire hose 24 connected to the high-pressure water pump, one side of the water spray pipe 21 is rotatably installed with a rotating sprocket 25 in an array, the lower end of the rotating sprocket 25 is fixedly installed with a water deflection plate 26, the water deflection plate 26 is a hollow sheet structure, and a nozzle 27 is fixedly installed on one side of the lower end of the water deflection plate 26, and the rotating sprocket 25 and the nozzle 27 are respectively It is arranged on the upper and lower sides of the deflecting plate 26 and on both sides of the axial position. The nozzle 27 is connected with the water spray pipe 21 through the deflecting plate 26 and the rotating sprocket 25. When the high-pressure water pump supplies high-pressure water to the inside of the water spray pipe 21 through the steel wire hose 24, the high-pressure water passes through the center position of the rotating sprocket 25 and the inside of the deflecting plate 26, and then is sprayed out through the nozzle 27 to perform descaling. The slider 23 on the end head 22 makes it easy to slide the water spray mechanism 2 on the mounting part 1, and when the bidirectional screw 3 is rotated, the distance between the water spray mechanisms 2 can be adjusted. It has strong applicability and improves the descaling effect.

[0051] like Figure 4 and Figure 5 As shown, a driving motor 28 is fixedly mounted on the end 22 at one end, a driving sprocket 29 is fixedly mounted on the output end of the driving motor 28, and a guide sprocket 210 is rotatably mounted on the end 22 at the other end. An internal tooth chain 211 is sleeved between the driving sprocket 29, the guide sprocket 210 and the rotating sprocket 25. When the driving motor 28 drives the driving sprocket 29 to rotate, the rotating sprocket 25 and the guide sprocket 210 are rotated through the internal tooth chain 211, and then the water deflection plate 26 is driven to rotate, so that the position of the nozzle 27 is rotated. When the nozzle 27 sprays water, the high-pressure water flow sprayed out is in a spiral state and sprayed onto the gantry steel, thereby improving the descaling range and effect.

[0052] like Figure 6As shown, a threaded tube 212 is fixedly installed on the water deflection plate 26 at the position of the nozzle 27, and a sealing plug 213 is threadedly connected to the threaded tube 212. The sealing plug 213 seals the nozzle 27. When the nozzles 27 at both ends are not in use, the sealing plugs 213 are threadedly connected to the threaded tube 212 to achieve the effect of sealing the nozzle 27, so that the number and position of the nozzles 27 can be selected according to actual needs.

[0053] Working principle: In the process, the residual stress inside the material is significantly reduced by precisely adjusting the process parameters of the hydraulic bending, thereby reducing the probability of surface scratches and pits, and reducing the occurrence of surface defects. By introducing the third descaling process, not only the surface cleanliness is improved, but also the risk of environmental pollution is reduced, which is in line with the concept of green manufacturing. In the third descaling process, the water spray component used effectively improves the descaling range and effect. When using the water spray component, first install the water spray component on the processing production line through the mounting part 1, and adjust the distance between the water spray mechanism 2 on the upper and lower sides through the bidirectional lead screw 3, so as to facilitate the descaling of gantry steels of different heights. During adjustment, the slider 23 on the end head 22 slides up and down inside the slide groove on the mounting part 1, which has strong applicability. During descaling, the high-pressure water pump supplies high-pressure water through the steel wire hose 24. When entering the water spray pipe 21, the high-pressure water passes through the center position of the rotating sprocket 25 and the inside of the water deflection plate 26, and is sprayed out through the nozzle 27. The driving motor 28 drives the driving sprocket 29 to rotate, and through the internal tooth chain 210, the rotating sprocket 25 and the guide sprocket 210 are rotated, thereby driving the water deflection plate 26 to rotate, so that the position of the nozzle 27 is rotated. When the nozzle 27 sprays water, the sprayed high-pressure water flow is in a spiral state and sprayed onto the portal steel, thereby improving the descaling range and effect. According to the implementation requirements, when the nozzles 27 at both ends are not used, the sealing plug 213 is threadedly connected to the threaded pipe 212 to achieve the effect of sealing the nozzle 27, so that the number and position of the nozzle 27 can be selected according to the needs. Through the third descaling process, the surface cleanliness of the portal steel is improved, and the market competitiveness of the product is further enhanced.

[0054] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A process for optimizing the production of portal steel and improving its surface quality, characterized in that: The process includes the following steps: S1: Clean the outer surface of the material; S2: Check whether all mechanical equipment is in good condition, then start the hydraulic press and set it to the specified working parameters; S3: Heating the material, and starting the bending program when the temperature controller detects that the material temperature reaches the set value; S4: bend the material, and the pressing time is controlled between 8s-10s; S5: After the bending is completed, the descaling mechanism is immediately started to perform high-pressure water jet descaling, and the surface of the bent steel is fully rinsed and descaled again; S6: Perform surface inspection on the portal steel section formed after bending to complete the portal steel section production.

2. The process for optimizing portal steel production and improving surface quality according to claim 1 is characterized in that: In step S1, when cleaning the material surface, soap solution is used for cleaning, and after cleaning, air drying is performed. Before the material surface is cleaned, the material is processed by a roughing mill and a finishing mill, and two descaling operations are performed between the roughing mill and the finishing mill.

3. The process for optimizing the production of portal steel and improving the surface quality according to claim 1 is characterized in that: In step S2, when setting the working parameters of the hydraulic press, the pressure value of the equipment is set to between 200MPa-270MPa.

4. The process for optimizing portal steel production and improving surface quality according to claim 1 is characterized in that: In step S3, the material is heated to between 180°C and 220°C, and after the temperature is stabilized, it is pressed.

5. The process for optimizing portal steel production and improving surface quality according to claim 1 is characterized in that: In step S5, the descaling mechanism sprays water on both sides of the bent steel, and the descaling mechanism consists of a water spray assembly, a high-pressure water pump and a control system. The water spray assembly is integrated into the existing bending device production line, and the high-pressure water pump supplies water to the water spray assembly. The control system regulates the water spray assembly and the high-pressure water pump. The pressure of high-pressure water sprayed by the water spray assembly is between 18MPa and 22MPa.

6. The process for optimizing portal steel production and improving surface quality according to claim 5 is characterized in that: The water spray assembly comprises a mounting member (1), and a water spray mechanism (2) for spraying water on both sides of a material for descaling is slidably mounted on the upper and lower ends of the mounting member (1), and a bidirectional lead screw (3) is vertically rotatably mounted inside the mounting member (1), and the end of the water spray mechanism (2) is threadedly connected to the bidirectional lead screw (3).

7. The process for optimizing portal steel production and improving surface quality according to claim 6 is characterized in that: The water spray mechanism (2) comprises a water spray pipe (21), both ends of the water spray pipe (21) are fixedly mounted with end caps (22), and one side of the end cap (22) is fixedly mounted with a slider (23), the slider (23) is slidably clamped on the mounting member (1), the slider (23) is threadedly connected to the bidirectional lead screw (3), one end of the water spray pipe (21) is fixedly mounted with a steel hose (24) connected to the high-pressure water pump, one side of the water spray pipe (21) is rotatably mounted with a rotating sprocket (25) in an array, the lower end of the rotating sprocket (25) is fixedly mounted with a water deflection disc (26), and one side of the lower end of the water deflection disc (26) is fixedly mounted with a spray head (27), and the spray head (27) is connected to the water spray pipe (21) through the water deflection disc (26) and the rotating sprocket (25).

8. The process for optimizing portal steel production and improving surface quality according to claim 7 is characterized in that: A driving motor (28) is fixedly mounted on the end head (22) at one end, a driving sprocket (29) is fixedly mounted on the output end of the driving motor (28), and a guide sprocket (210) is rotatably mounted on the end head (22) at the other end, and an internal tooth chain (211) is sleeved between the driving sprocket (29), the guide sprocket (210) and the rotating sprocket (25).

9. The process for optimizing portal steel production and improving surface quality according to claim 7, characterized in that: A threaded pipe (212) is fixedly mounted on the water deflecting plate (26) at the position of the nozzle (27), and a sealing plug (213) is threadedly connected to the threaded pipe (212), and the sealing plug (213) seals the nozzle (27).

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