Method for rolling 170*190mm bar through cogging mill pass system

Abstract

The invention discloses a method for rolling 170 * 190 mm bars through a cogging mill pass system, and relates to the technical field of cogging mills. According to the method for rolling the bar with the size of 170 * 190 mm through a cogging mill pass system, a cogging mill rolling system comprises a large manipulator opening degree, a small manipulator opening degree and cogging mill rolling reduction, and a 430 * 350 mm raw material section is rolled into a section with the size of 170 * 190 mm through nine passes; turning steel in front of a first pass machine, wherein the K1 rolling reduction is 75-95 mm; turning steel after a second pass machine, wherein the rolling reduction of K1 is 50-70mm; turning steel in front of a third pass machine, wherein the rolling reduction of K2 is 60-80 mm; turning steel after a fourth pass machine, wherein the rolling reduction of K2 is 70-90 mm; turning steel in front of the machine in the fifth pass, wherein the rolling reduction of K3 is 55-75 mm; the steel is not turned over in the sixth pass, and the rolling reduction of K3 is 50-70 mm; turning steel in front of the machine in the seventh pass, wherein the rolling reduction of K4 is 55-75 mm; steel turning is avoided in the eighth pass, and the rolling reduction of K3 is 35-55 mm; and turning steel in front of the ninth pass machine, wherein the rolling reduction of K5 is 50-70 mm.

Description

Technical Field

[0001] The invention relates to the technical field of a blanking machine, and in particular to a method for rolling a bar material into a size of 170×190 mm using a blanking machine pass system. Background Art

[0002] The main function of the billet mill is to reciprocate and roll the billet heated by the heating furnace into an intermediate billet of a certain size for the continuous rolling mill. During the rolling process, the billet mill can automatically adjust the reduction according to the pre-set tool parameters and rolling program to achieve the desired rolling effect. However, the billet mill also has some disadvantages, such as low output, low yield rate, many operators and relatively backward technology.

[0003] The existing patent announcement number: CN218340652U discloses a blanking machine pass type that is used for a set of rollers to roll various cross-section billets. The rollers are provided with roll pass type 4, roll pass type 3, and roll pass type 2. The blanking machine pass type that is used for a set of rollers to roll various cross-section billets of φ60 to φ250 mm round steel reduces the width of the roll pass type 3 and the width of the roller rings of the middle holes, and increases the number of pass types from 3 to 4, thereby reducing the roll changing time. It can realize the production of Φ60-Φ250 mm round steel and 140-200×170-240 mm large-size electrode flat steel from billets with cross-sections of 240×240 mm, 280×380 mm, 320×415 mm, and Φ200-Φ350 mm. However, the set of pass type system has only 4 pass types. But the patent does not have a low efficiency when rolling small-size sections. Summary of the invention

[0004] The object of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a method for rolling a bar material into 170×190 mm by using a blanking mill pass system, which can solve the above-mentioned problem.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a bar is rolled using a blanking machine pass system, including five pass types, K5, K4, K3, K2, and K1;

[0006] The design K5 slot is 380-400mm, the slot bottom is 350-360mm, the hole R angle is 23-27mm, the r angle is 23-27mm, the side wall slope is 14-16°, and the slot height is 145-155mm;

[0007] The K4 slot is 330-340mm, the slot bottom is 295-305mm, the hole R angle is 23-27mm, the r angle is 23-27mm, the side wall slope is 13-15°, and the slot height is 145-155mm;

[0008] The K3 notch is 270-280mm, the groove bottom is 235-245mm, the hole R angle is 28-32mm, the r angle is 23-27mm, the side wall slope is 12-14°, and the groove height is 165-175mm;

[0009] The K2 slot is 225-235mm, the slot bottom is 195-200mm, the hole R angle is 28-32mm, the r angle is 23-27mm, the side wall slope is 12-14°, and the slot height is 165-175mm;

[0010] K1 slot is 200-210mm, slot bottom is 165-175mm, hole R angle is 28-32mm, r angle is 23-27mm, side wall slope is 12-14°, slot height is 165-175mm;

[0011] The slab mill rolling system includes the large push bed opening, the small push bed opening, and the slab mill reduction. The 430*350mm raw material section is rolled into a 170×190mm section in 9 passes.

[0012] The first pass is front turning of the steel, and the K1 rolling reduction is 75-95mm;

[0013] The second pass is post-rolling, and the K1 rolling reduction is 50-70mm;

[0014] The third pass is front turning of the steel, and the K2 rolling reduction is 60-80mm;

[0015] The fourth pass is followed by steel turning, and the K2 rolling reduction is 70-90mm;

[0016] The fifth pass is front turning of the steel, and the K3 rolling reduction is 55-75mm;

[0017] The sixth pass does not turn the steel over, and the K3 rolling reduction is 50-70mm;

[0018] The seventh pass is front turning of the steel, and the K4 rolling reduction is 55-75mm;

[0019] The eighth pass does not turn the steel over, and the K3 rolling reduction is 35-55mm;

[0020] The ninth pass is front-end steel turning, and the K5 rolling reduction is 50-70mm.

[0021] Preferably, the distance between the K5-K1 hole types is 53 mm.

[0022] Preferably, K1 is 100 mm away from the roller head, and K5 is 100 mm away from the roller bottom.

[0023] Preferably, the diameter of the upper roller is 1100-1102 mm, and the diameter of the lower roller is 1096-1098 mm.

[0024] Preferably, the eighth pass does not turn the steel over but returns to the third hole for rolling, thereby providing a large reduction while reducing the number of rolling passes.

[0025] Preferably, the opening of the large push bed is 5-10 mm larger than the width of the rolled material, and the opening of the small push bed is 7-14 mm larger than the width of the rolled material.

[0026] Preferably, a method for rolling a bar into 170×190 mm using a billet mill comprises the following specific steps:

[0027] S1 Preparation before rolling: Raw material preparation, prepare raw material billets of appropriate size and quality, ensure that the chemical composition and dimensional tolerance of the billets meet the requirements of rolled products, equipment inspection, check the mechanical parts of the billet machine, such as rolls, bearings, and transmission systems, to ensure that they are in good working condition; check the electrical system to ensure normal power supply and stable control system; check the lubrication system to ensure that each lubrication point has sufficient oil supply, hole type inspection and adjustment, check the hole type required for rolling, ensure that the wear of the hole type is within the allowable range, and accurately adjust the hole type according to the product specification requirements of 170×190mm, including the height, width, and roll gap parameters of the hole type.

[0028] S2 Heating and charging: Heating, placing the billet into the heating furnace, heating it according to the predetermined heating curve, so that the billet reaches the appropriate rolling temperature, usually between 1100-1300℃, to ensure that the billet has good plasticity and low deformation resistance;

[0029] Loading: When the billet is heated to the specified temperature, the conveying device is used to smoothly feed the billet into the inlet of the billet machine;

[0030] S3 rolling process: In the rough rolling stage, the billet enters the first pass of the billet mill for preliminary rolling. Through repeated rolling for several times, the cross-sectional size of the billet is gradually reduced, so that the shape and size of the billet are close to the prototype of the target specification;

[0031] In the intermediate rolling stage, the billet after rough rolling enters the intermediate rolling pass to continue rolling, further accurately adjusting the shape and size of the billet to improve dimensional accuracy and surface quality;

[0032] In the finishing rolling stage, based on the intermediate rolling, the steel billet enters the finishing rolling pass for the final rolling, ensuring that the size of the rolled product accurately meets the requirement of 170×190mm and the surface quality of the product meets the specified standards;

[0033] S4 Post-rolling treatment: Cooling. After rolling, the product enters the cooling area through a conveyor and is cooled by natural cooling, air cooling or water cooling to ensure that the product's performance and structure meet the requirements.

[0034] Shearing and sizing: according to the use requirements of the product, the cooled rolled material is sheared and sizing is carried out into products of specified length;

[0035] Quality inspection: dimensional measurement, surface quality inspection, and mechanical property test of the rolled products to ensure that the product quality meets relevant standards and customer requirements;

[0036] Collection and storage: Products that have passed quality inspection are collected, bundled or packaged, and then stored in designated warehouses or yards.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] 1. The bar is rolled with the blanking mill pass system, with large reduction: by returning to the third hole for rolling, a large reduction can be achieved in this pass, which helps to quickly reduce the cross-sectional area and length of the rolled piece, making it closer to the size of the final product, and reducing the number of rolling passes: by increasing the reduction in the eighth pass, the number of subsequent rolling passes required can be reduced, thereby improving the overall rolling efficiency.

[0039] 2. The bar is rolled using a cogging mill hole system, and the side wall inclination of the cogging mill is similar. The side wall inclination refers to the angle between the side wall of the hole and the vertical line of the roller axis. It is used to describe the degree of inclination of the side wall of the hole. It can be expressed as a percentage, the tangent value of the angle, or directly as an angle. When the side wall inclinations of different hole types in the cogging mill hole system are similar, it usually means that these hole types have similar characteristics in controlling metal flow and rolling force during the rolling process. This similarity helps to maintain the stability and consistency of the rolling process and improve rolling efficiency and product quality.

[0040] 3. The bar is rolled with a blanking machine hole system. The R angle of the blanking machine hole system K1 / K2 is smaller than that of K3 / K4 / K5. In the initial stage of rolling (such as K1 / K2), a smaller R angle is required to better control the flow and shape of the metal, while in the subsequent stage (such as K3 / K4 / K5), as the metal gradually deforms and compresses, a larger R angle is required to reduce rolling force and energy consumption.

[0041] 4. A method for rolling a bar with a slab mill to a size of 170×190 mm, the step having the following effects and strong systematicity: from pre-rolling preparation, heating and loading, rolling process to post-rolling treatment, it covers the entire rolling production process, and each link is closely connected to form a complete production system, which helps to ensure the continuity and stability of production;

[0042] Quality assurance: Before rolling, the equipment, hole type and raw materials are strictly inspected and prepared. The rough rolling, intermediate rolling and finishing rolling stages are set in the rolling process, which can gradually and accurately control the shape, size and surface quality of the product; after rolling, quality inspection is carried out again. The product quality is controlled in multiple links, which can effectively improve the product qualification rate and quality stability;

[0043] Improved efficiency: Reasonable heating and loading processes and phased rolling process planning help improve production efficiency. Through reasonable division of labor and collaborative work in each stage, the pause and waiting time in production are reduced, making the entire rolling process smoother and more efficient;

[0044] High flexibility: This method has certain flexibility in equipment inspection and hole adjustment. It can be adjusted and optimized according to different production requirements, raw material characteristics and equipment conditions to adapt to different production scenarios and needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0046] Figure 1 The rolling program table of the slab opening machine of the present invention;

[0047] Figure 2 It is a schematic diagram of the cross-sectional dimensions of the spring flat steel of the present invention. DETAILED DESCRIPTION

[0048] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0049] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, and right, and the orientation or positional relationship indicated are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0050] In the description of the present invention, "greater than", "less than" and "exceed" are understood as not including the number itself, and "above", "below" and "within" are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0051] In the description of the present invention, unless otherwise clearly defined, the terms such as setting, installing and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0052] See also Figure 1-2 ,The present invention provides a technical solution: a bar is rolled using a blanking machine pass system, including five pass types, K5, K4, K3, K2, and K1;

[0053] The design K5 slot is 380-400mm, the slot bottom is 350-360mm, the hole R angle is 23-27mm, the r angle is 23-27mm, the side wall slope is 14-16°, and the slot height is 145-155mm;

[0054] The K4 slot is 330-340mm, the slot bottom is 295-305mm, the hole R angle is 23-27mm, the r angle is 23-27mm, the side wall slope is 13-15°, and the slot height is 145-155mm;

[0055] The K3 notch is 270-280mm, the groove bottom is 235-245mm, the hole R angle is 28-32mm, the r angle is 23-27mm, the side wall slope is 12-14°, and the groove height is 165-175mm;

[0056] The K2 slot is 225-235mm, the slot bottom is 195-200mm, the hole R angle is 28-32mm, the r angle is 23-27mm, the side wall slope is 12-14°, and the slot height is 165-175mm;

[0057] The K1 slot is 200-210mm, the slot bottom is 165-175mm, the hole R angle is 28-32mm, the r angle is 23-27mm, the side wall slope is 12-14°, and the slot height is 165-175mm.

[0058] Furthermore, the distance between the K5-K1 hole types is 53 mm;

[0059] Furthermore, K1 is 100 mm away from the roller head, and K5 is 100 mm away from the roller bottom; at the same time, in this hole type system, the diameter of the upper roller is 1100-1102 mm, and the diameter of the lower roller is 1096-1098 mm.

[0060] The slab mill rolling system includes the large push bed opening, the small push bed opening, and the slab mill reduction. The 430*350mm raw material section is rolled into a 170×190mm section in 9 passes.

[0061] The first pass is front turning of the steel, and the K1 rolling reduction is 75-95mm;

[0062] The second pass is post-rolling, and the K1 rolling reduction is 50-70mm;

[0063] The third pass is front turning of the steel, and the K2 rolling reduction is 60-80mm;

[0064] The fourth pass is followed by steel turning, and the K2 rolling reduction is 70-90mm;

[0065] The fifth pass is front turning of the steel, and the K3 rolling reduction is 55-75mm;

[0066] The sixth pass does not turn the steel over, and the K3 rolling reduction is 50-70mm;

[0067] The seventh pass is front turning of the steel, and the K4 rolling reduction is 55-75mm;

[0068] The eighth pass does not turn the steel over, and the K3 rolling reduction is 35-55mm;

[0069] The ninth pass is front turning of the steel, and the K5 rolling reduction is 50-70mm;

[0070] Among them, the eighth pass does not turn the steel over and returns to the third hole for rolling, providing a large reduction while reducing the number of rolling passes;

[0071] Among them, the opening degree of the large push bed is 5-10mm larger than the width of the rolled material, and the opening degree of the small push bed is 7-14mm larger than the width of the material after rolling.

[0072] The diameter of the upper roll of the present invention is larger than that of the lower roll. This configuration is called "upper pressure rolling" because it enables the upper roll to generate greater pressure relative to the lower roll, which helps to improve the bite conditions, increase the reduction amount and enhance the blank opening ability.

[0073] The R angle of the blanking machine hole system K1 / K2 is smaller than that of K3 / K4 / K5. In the initial stage of rolling (such as K1 / K2), a smaller R angle is required to better control the flow and shape of the metal, while in the subsequent stages (such as K3 / K4 / K5), as the metal gradually deforms and compresses, a larger R angle is required to reduce rolling force and energy consumption.

[0074] The side wall slope of the blanking machine is similar. The side wall slope refers to the angle between the side wall of the hole and the vertical line of the roller axis. It is used to describe the degree of inclination of the side wall of the hole. It can be expressed as a percentage, the tangent value of the angle or directly as an angle. When the side wall slopes of different hole types in the blanking machine hole system are similar, it usually means that these hole types have similar characteristics in the control of metal flow and rolling force during the rolling process. This similarity helps to maintain the stability and consistency of the rolling process and improve rolling efficiency and product quality.

[0075] Large reduction: By returning to the third hole for rolling, a larger reduction can be achieved in this pass, which helps to quickly reduce the cross-sectional area and length of the rolled piece, making it closer to the size of the final product. Reduce the number of rolling passes: By increasing the reduction in the eighth pass, the number of subsequent rolling passes required can be reduced, thereby improving the overall rolling efficiency.

[0076] The rolling program table of the slab mill in this embodiment is as follows: Figure 1 As shown;

[0077] A method for rolling a bar into 170×190 mm using a billet mill comprises the following specific steps:

[0078] S1 Preparation before rolling: Raw material preparation, prepare raw material billets of appropriate size and quality, ensure that the chemical composition and dimensional tolerance of the billets meet the requirements of rolled products, equipment inspection, check the mechanical parts of the billet machine, such as rolls, bearings, and transmission systems, to ensure that they are in good working condition; check the electrical system to ensure that the power supply is normal and the control system is stable; check the lubrication system to ensure that each lubrication point is adequately supplied with oil, hole inspection and adjustment, check the hole required for rolling, and ensure that the wear of the hole is within the allowable range. According to the product specification requirements of 170×190mm, the hole is precisely adjusted, including the height, width, and roll gap parameters of the hole.

[0079] S2 Heating and charging: Heating, placing the billet into the heating furnace, heating it according to the predetermined heating curve, so that the billet reaches the appropriate rolling temperature, usually between 1100-1300℃, to ensure that the billet has good plasticity and low deformation resistance;

[0080] Loading: When the billet is heated to the specified temperature, the conveying device is used to smoothly feed the billet into the inlet of the billet machine;

[0081] S3 rolling process: In the rough rolling stage, the billet enters the first pass of the billet mill for preliminary rolling. Through repeated rolling for several times, the cross-sectional size of the billet is gradually reduced, so that the shape and size of the billet are close to the prototype of the target specification;

[0082] In the intermediate rolling stage, the billet after rough rolling enters the intermediate rolling pass to continue rolling, further accurately adjusting the shape and size of the billet to improve dimensional accuracy and surface quality;

[0083] In the finishing rolling stage, based on the intermediate rolling, the steel billet enters the finishing rolling pass for the final rolling, ensuring that the size of the rolled product accurately meets the requirement of 170×190mm and the surface quality of the product meets the specified standards;

[0084] S4 Post-rolling treatment: Cooling. After rolling, the product enters the cooling area through a conveyor and is cooled by natural cooling, air cooling or water cooling to ensure that the product's performance and structure meet the requirements.

[0085] Shearing and sizing: according to the use requirements of the product, the cooled rolled material is sheared and sizing is carried out into products of specified length;

[0086] Quality inspection: dimensional measurement, surface quality inspection, and mechanical property test of the rolled products to ensure that the product quality meets relevant standards and customer requirements;

[0087] Collection and storage: Products that pass quality inspection are collected, bundled or packaged, and then stored in designated warehouses or yards.

[0088] Furthermore, this step has the following effects and is highly systematic: from pre-rolling preparation, heating and loading, rolling process to post-rolling processing, it covers the entire process of rolling production, and each link is closely connected to form a complete production system, which helps to ensure the continuity and stability of production.

[0089] Quality assurance: Before rolling, the equipment, hole profile and raw materials are strictly inspected and prepared. Rough rolling, intermediate rolling and finishing rolling stages are set during the rolling process, which can gradually and accurately control the shape, size and surface quality of the products. Quality inspection is carried out after rolling. Multi-link control of product quality can effectively improve the product qualification rate and quality stability.

[0090] Efficiency improvement: Reasonable heating and loading processes and phased rolling process planning help improve production efficiency. Through reasonable division of labor and collaborative work in each stage, the pause and waiting time in production are reduced, making the entire rolling process smoother and more efficient.

[0091] High flexibility: This method has certain flexibility in equipment inspection and hole adjustment. It can be adjusted and optimized according to different production requirements, raw material characteristics and equipment conditions to adapt to different production scenarios and needs.

[0092] Working Principle:.

[0093] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A bar is rolled using a blanking machine pass system, characterized in that: Includes five hole types, K5, K4, K3, K2, K1; The design K5 slot is 380-400mm, the slot bottom is 350-360mm, the hole R angle is 23-27mm, the r angle is 23-27mm, the side wall slope is 14-16°, and the slot height is 145-155mm; The K4 slot is 330-340mm, the slot bottom is 295-305mm, the hole R angle is 23-27mm, the r angle is 23-27mm, the side wall slope is 13-15°, and the slot height is 145-155mm; The K3 notch is 270-280mm, the groove bottom is 235-245mm, the hole R angle is 28-32mm, the r angle is 23-27mm, the side wall slope is 12-14°, and the groove height is 165-175mm; The K2 slot is 225-235mm, the slot bottom is 195-200mm, the hole R angle is 28-32mm, the r angle is 23-27mm, the side wall slope is 12-14°, and the slot height is 165-175mm; K1 slot is 200-210mm, slot bottom is 165-175mm, hole R angle is 28-32mm, r angle is 23-27mm, side wall slope is 12-14°, slot height is 165-175mm; The slab mill rolling system includes the large push bed opening, the small push bed opening, and the slab mill reduction. The 430*350mm raw material section is rolled into a 170×190mm section in 9 passes. The first pass is front turning of the steel, and the K1 rolling reduction is 75-95mm; The second pass is post-rolling, and the K1 rolling reduction is 50-70mm; The third pass is front turning of the steel, and the K2 rolling reduction is 60-80mm; The fourth pass is followed by steel turning, and the K2 rolling reduction is 70-90mm; The fifth pass is front turning of the steel, and the K3 rolling reduction is 55-75mm; The sixth pass does not turn the steel over, and the K3 rolling reduction is 50-70mm; The seventh pass is front turning of the steel, and the K4 rolling reduction is 55-75mm; The eighth pass does not turn the steel over, and the K3 rolling reduction is 35-55mm; The ninth pass is front-end steel turning, and the K5 rolling reduction is 50-70mm.

2. The bar material is rolled using a blanking mill pass system according to claim 1, characterized in that: The distance between the K5-K1 holes is 53 mm.

3. The bar material is rolled using a blanking mill pass system according to claim 1, characterized in that: The distance between K1 and the roller head is 100 mm, and the distance between K5 and the roller bottom is 100 mm.

4. The bar material is rolled using a blanking mill pass system according to claim 1, characterized in that: The diameter of the upper roller is 1100-1102 mm, and the diameter of the lower roller is 1096-1098 mm.

5. The method for rolling a bar material with a 170×190 mm diameter using a pass system of a cogging mill according to claim 1, characterized in that: The eighth pass does not turn the steel over and returns to the third hole for rolling, thereby providing a large reduction while reducing the number of rolling passes.

6. The bar material is rolled using a blanking mill pass system according to claim 1, characterized in that: The opening of the large push bed is 5-10mm larger than the width of the rolled material, and the opening of the small push bed is 7-14mm larger than the width of the rolled material.

7. A method for rolling a bar into 170×190 mm using a blooming mill, characterized in that: The specific steps include: S1 Preparation before rolling: Raw material preparation, prepare raw material billets of appropriate size and quality, ensure that the chemical composition and dimensional tolerance of the billets meet the requirements of rolled products, equipment inspection, check the mechanical parts of the billet machine, such as rolls, bearings, and transmission systems, to ensure that they are in good working condition; check the electrical system to ensure that the power supply is normal and the control system is stable; check the lubrication system to ensure that each lubrication point is adequately supplied with oil, hole type inspection and adjustment, check the hole type required for rolling, ensure that the wear of the hole type is within the allowable range, and accurately adjust the hole type according to the product specification requirements of 170×190mm, including the height, width, and roll gap parameters of the hole type; S2 Heating and charging: Heating, placing the billet into the heating furnace, heating it according to the predetermined heating curve, so that the billet reaches the appropriate rolling temperature, usually between 1100-1300℃, to ensure that the billet has good plasticity and low deformation resistance; Loading: When the billet is heated to the specified temperature, the conveying device is used to smoothly feed the billet into the inlet of the billet machine; S3 rolling process: In the rough rolling stage, the billet enters the first pass of the billet mill for preliminary rolling. Through repeated rolling for several times, the cross-sectional size of the billet is gradually reduced, so that the shape and size of the billet are close to the prototype of the target specification; In the intermediate rolling stage, the billet after rough rolling enters the intermediate rolling pass to continue rolling, further accurately adjusting the shape and size of the billet to improve dimensional accuracy and surface quality; In the finishing rolling stage, based on the intermediate rolling, the steel billet enters the finishing rolling pass for the final rolling, ensuring that the size of the rolled product accurately meets the requirement of 170×190mm and the surface quality of the product meets the specified standards; S4 Post-rolling treatment: Cooling. After rolling, the product enters the cooling area through a conveyor and is cooled by natural cooling, air cooling or water cooling to ensure that the product's performance and structure meet the requirements. Shearing and sizing: according to the use requirements of the product, the cooled rolled material is sheared and sizing is carried out into products of specified length; Quality inspection: perform dimensional measurement, surface quality inspection, and mechanical property test on the rolled products to ensure that the product quality meets relevant standards and customer requirements; Collection and storage: Products that pass quality inspection are collected, bundled or packaged, and then stored in designated warehouses or yards.

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