Twenty-high rolling mill backing roller capable of achieving uniform bulging through electromagnetic induction heating

Abstract

The invention belongs to the technical field of cold-rolled strip steel production control in the metallurgical industry, and particularly relates to an electromagnetic induction heating uniform bulging twenty-high rolling mill backing roller which comprises a mandrel and a plurality of supporting devices, the supporting devices are evenly arranged in the axial direction of the mandrel, and the supporting devices are arranged on the mandrel. An electromagnetic regulation and control assembly is arranged between every two adjacent supporting devices, screw-down gears are installed at the two ends of the core shaft, positioning rings are installed between the screw-down gears and the adjacent supporting devices, a first through hole is formed in the core shaft, and a plurality of second through holes corresponding to the electromagnetic regulation and control assemblies one to one are formed in the core shaft. According to the production line, a hydraulic device is replaced with electromagnetic induction, the problem that strip steel is polluted due to hydraulic oil leakage is solved, and the safety and the environmental protection property of the production line are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of cold-rolled strip steel production control in the metallurgical industry, and in particular relates to a twenty-roll mill backing roller that is uniformly expanded by electromagnetic induction heating. Background Art

[0002] As a key equipment for rolling high-end strip products, the 20-high rolling mill plays an important role in the production of silicon steel, stainless steel and other materials due to its high precision, large reduction rate and high rigidity. In order to obtain finished strip with good plate shape, the 20-high rolling mill relies on a variety of adjustment mechanisms, among which the AS-U-ROLL roll shape adjustment mechanism is particularly critical in the application of large and medium-sized Sendzimir rolling mills. However, this mechanism also has some limitations and challenges.

[0003] The AS-U-ROLL roll shape adjustment mechanism adjusts the shaft deformation of the support roll group by rotating the outer eccentric ring, thereby changing the shape of the working roll to eliminate the plate shape defects of the rolled strip. However, its convexity adjustment ability is limited in the working state, usually limited to less than 1 / 3 to 1 / 2 of the convexity adjustment rack stroke. In addition, the deformation and inclination of the support roll mandrel will also cause the inclination of the backing bearing, further limiting the adjustment amount of the AS-U-ROLL roll shape adjustment mechanism; in addition to the limitation of the adjustment ability, the AS-U-ROLL roll shape adjustment mechanism also faces the risk of hydraulic oil leakage. Once the hydraulic oil of the hydraulic equipment leaks, especially in the rolling mill roll system area and its vicinity, it is easy to contaminate the surface of the strip. This contamination will form white spot defects on the surface of the strip after the subsequent annealing and pickling process, seriously affecting the product quality. At the same time, after the hydraulic oil leaks into the rolling oil circulation system, it will increase the viscosity of the rolling oil, reduce its cleanliness, and have a negative impact on the cooling and lubrication of the strip. Summary of the invention

[0004] The present invention provides a twenty-high mill backing roller that is uniformly expanded by electromagnetic induction heating in order to solve the above-mentioned problems of backing bearing tilting and hydraulic oil leakage.

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

[0006] A twenty-roller mill backing roller for uniform bulging by electromagnetic induction heating comprises a mandrel and a supporting device, wherein the supporting devices are provided in plurality and are uniformly arranged along the axial direction of the mandrel, an electromagnetic regulating component is arranged between two adjacent supporting devices, the electromagnetic regulating component is assembled with the mandrel through a bearing, a pressing gear is installed at both ends of the mandrel by a key connection, a positioning ring is installed between the pressing gear and the adjacent supporting device, the positioning ring is sleeved on the mandrel, a No. 1 through hole is provided on the axis center of the mandrel, a plurality of No. 2 through holes corresponding to the electromagnetic regulating components are arranged on the mandrel, and the No. 2 through holes corresponding to the electromagnetic regulating components are arranged on the mandrel. The No. 1 through hole is connected with the No. 1 through hole, and both ends of the high-temperature mica wire in the electromagnetic regulation component are connected to the variable frequency power supply; the electromagnetic regulation component includes a honeycomb thermal expansion ring, a roller sleeve and a high-temperature mica wire, and grooves are provided at both ends of the honeycomb thermal expansion ring, and a bearing is assembled in the groove of the honeycomb thermal expansion ring, and the honeycomb thermal expansion ring is connected to the core shaft through the bearing, and the outer ring of the honeycomb thermal expansion ring is connected to the roller sleeve by an interference fit. A No. 3 through hole is provided on the honeycomb thermal expansion ring, and the No. 3 through holes are evenly distributed in M ​​layers radially, and each layer is evenly distributed in N layers circumferentially, and the high-temperature mica wire passes through M×N No. 3 through holes in sequence.

[0007] Furthermore, the supporting device includes a wabe, which is fixedly connected to the frame, and the lower surface of the wabe is connected to a saddle ring by screws, the inner circle of the saddle ring is connected to the outer circle of the needle bearing, the inner circle of the needle bearing is connected to the outer ring of the eccentric ring, and the inner ring of the eccentric ring is installed on the core shaft by key connection.

[0008] Furthermore, a heat-insulating ring is installed between the electromagnetic control component and the supporting device to avoid heat loss and transfer.

[0009] Furthermore, a heat insulating coating is provided in the contact area between the honeycomb heat expansion ring and the bearing, and a heat insulating coating is provided in the contact area between the honeycomb heat expansion ring and the core shaft to prevent the honeycomb heat expansion ring from transferring heat to the core shaft.

[0010] Furthermore, multiple layers of temperature sensors are evenly distributed radially between the electromagnetic control component and the thermal insulation ring, with multiple temperature sensors evenly distributed on each layer, and the temperature sensors are used to detect the temperature of the electromagnetic control component.

[0011] Furthermore, the roller sleeve is made of high-speed wear-resistant steel material, which prolongs the service life and rolling mileage of the electromagnetically controlled backing roller. When the roller sleeve is severely worn, the roller sleeve can be directly replaced to reduce maintenance costs.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. The roller sleeve of the present invention is made of high-speed wear-resistant steel material, which prolongs the service life and rolling mileage of the electromagnetically controlled backing roller. When the wear is serious, the roller sleeve can be directly replaced, which has a simple structure and reduces maintenance costs.

[0014] 2. The present invention can adjust the temperature of a single honeycomb thermal expansion ring in real time online according to the temperature signal fed back by the temperature sensor, so that the roller shape control is more flexible and the operation is simple.

[0015] 3. The present invention adopts electromagnetic induction instead of hydraulic device, thus avoiding the problem of contamination of strip steel caused by leakage of hydraulic oil, and improving the safety and environmental protection of the production line.

[0016] 4. The electromagnetic control component of the present invention has unique advantages and technical characteristics in forming a specific roll shape. It can accurately control the roll shape to obtain the required convex or horizontal roll curve, making up for the disadvantage that the backing bearing itself cannot be controlled, and improving the quality and production efficiency of the product. At the same time, it also has good thermal insulation effect and flexibility, and can adapt to complex and changing process requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a structural schematic diagram of the mandrel of the present invention;

[0019] Figure 3 It is a structural schematic diagram of the electromagnetic control component of the present invention;

[0020] Figure 4 It is a structural schematic diagram of the supporting device of the present invention;

[0021] Figure 5 It is a structural schematic diagram of the pressing gear of the present invention;

[0022] Figure 6 A schematic diagram of the backing roller shape of the present invention;

[0023] Figure 7 For the present invention Figure 1 A partial enlarged view of the middle circle A;

[0024] In the figure, the core shaft 1, the first through hole 101, the second through hole 102, the supporting device 2, the wabe 201, the saddle ring 202, the needle bearing 203, the eccentric ring 204, the electromagnetic control component 3, the honeycomb thermal expansion ring 301, the roller sleeve 302, the third through hole 303, the bearing 4, the pressing gear 5, the positioning ring 6, and the thermal insulation ring 7. DETAILED DESCRIPTION

[0025] In order to further illustrate the technical solution of the present invention, the present invention is further described below through embodiments.

[0026] like Figure 1 , Figure 2 , Figure 5 and Figure 7 As shown, a twenty-roller mill backing roller for uniform bulging by electromagnetic induction heating comprises a mandrel 1 and a supporting device 2, wherein the supporting device 2 has a plurality of supporting devices 2, and the supporting devices 2 are evenly arranged along the axial direction of the mandrel 1, and an electromagnetic control component 3 is arranged between two adjacent supporting devices 2, and the electromagnetic control component 3 is assembled with the mandrel 1 through a bearing 4, and a pressing gear 5 is installed at both ends of the mandrel 1 by a key connection, and a positioning ring 6 is installed between the pressing gear 5 and the adjacent supporting device 2, and the positioning ring 6 is sleeved on the mandrel 1, and a through hole 101 is provided on the axis of the mandrel 1, and a plurality of electromagnetic control components are arranged on the mandrel 1. The No. 2 through hole 102 of the component 3 corresponds one by one, and the No. 2 through hole 102 is connected with the No. 1 through hole 101. Both ends of the high-temperature mica wire in the electromagnetic control component 3 are connected to the variable frequency power supply; a thermal insulation ring 7 is installed between the electromagnetic control component 3 and the supporting device 2 to avoid heat loss and transfer. There are multiple layers of temperature sensors evenly distributed radially between the electromagnetic control component 3 and the thermal insulation ring 7, and each layer has multiple temperature sensors evenly distributed. The temperature sensor is used to detect the temperature of the electromagnetic control component 3. The temperature of a single honeycomb thermal expansion ring 301 can be adjusted online in real time according to the temperature signal fed back by the temperature sensor, so that the roller shape control is more flexible and the operation is simple.

[0027] like Figure 3 As shown, the electromagnetic control component 3 includes a honeycomb thermal expansion ring 301, a roller sleeve 302 and a high-temperature mica wire. Grooves are provided at both ends of the honeycomb thermal expansion ring 301. A bearing 4 is installed in the groove of the honeycomb thermal expansion ring 301. The honeycomb thermal expansion ring 301 is connected to the mandrel 1 through the bearing 4. A thermal insulation coating is provided in the contact area between the honeycomb thermal expansion ring 301 and the bearing 4. A thermal insulation coating is provided in the contact area between the honeycomb thermal expansion ring 301 and the mandrel 1 to prevent the honeycomb thermal expansion ring 301 from transferring heat to the mandrel 1. The outer ring of the honeycomb thermal expansion ring 301 adopts an interference fit. The roller sleeve 302 is connected with the roller sleeve 302 in a combined manner. The roller sleeve 302 is made of high-speed wear-resistant steel material to extend the service life and rolling mileage of the electromagnetically regulated backing roller. When the wear is serious, the roller sleeve 302 can be directly replaced to reduce the maintenance cost. The honeycomb thermal expansion ring 301 is provided with a No. 3 through hole 303. The No. 3 through holes 303 are evenly distributed in M ​​layers radially, and each layer is evenly distributed in N layers circumferentially. The high-temperature mica wire passes through M×N No. 3 through holes 303 in sequence. Electromagnetic induction replaces the hydraulic device, which avoids the problem of contamination of the strip due to leakage of hydraulic oil, and improves the safety and environmental protection of the production line.

[0028] like Figure 4As shown, the supporting device 2 includes a wafer 201, which is fixedly connected to the frame, and the lower surface of the wafer 201 is connected to a saddle ring 202 by screws, the inner circle of the saddle ring 202 is connected to the outer circle of a needle roller bearing 203, the inner circle of the needle roller bearing 203 is connected to the outer ring of an eccentric ring 204, and the inner ring of the eccentric ring 204 is installed on the core shaft 1 by a key connection.

[0029] The present invention relies on electromagnetic induction heating technology and the thermal expansion characteristics of metals, and uses a variable frequency power supply and high-temperature mica wire to induction heat the honeycomb thermal expansion ring 301. The honeycomb thermal expansion ring 301 expands due to the heat, and the roller sleeve 302 generates a large contact force with its contact surface, resulting in a change in convexity, thereby achieving rapid regulation of the roller shape, and further achieving plate shape control.

[0030] The above shows and describes the main features and advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0031] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A twenty-high mill backing roll for uniform bulging by electromagnetic induction heating, characterized in that: The invention comprises a core shaft (1) and a supporting device (2), wherein the supporting device (2) is provided in plurality and is evenly arranged along the axial direction of the core shaft (1); an electromagnetic control component (3) is arranged between two adjacent supporting devices (2); the electromagnetic control component (3) is assembled with the core shaft (1) via a bearing (4); a pressing gear (5) is installed at both ends of the core shaft (1) in a key connection manner; a positioning ring (6) is installed between the pressing gear (5) and the adjacent supporting device (2); the positioning ring (6) is sleeved on the core shaft (1); a No. 1 through hole (101) is provided on the axis of the core shaft (1); a plurality of No. 2 through holes (102) corresponding to the electromagnetic control components (3) are arranged on the core shaft (1); the No. 2 through holes (102) are connected to the No. 1 through hole (101); and the two ends of the high-temperature mica wire in the electromagnetic control component (3) are connected to a variable frequency power supply; The electromagnetic control component (3) comprises a honeycomb thermal expansion ring (301), a roller sleeve (302) and a high-temperature mica wire. Grooves are provided at both ends of the honeycomb thermal expansion ring (301). A bearing (4) is installed in the groove of the honeycomb thermal expansion ring (301). The honeycomb thermal expansion ring (301) is connected to the core shaft (1) through the bearing (4). The outer ring of the honeycomb thermal expansion ring (301) is connected to the roller sleeve (302) by an interference fit. A No. 3 through hole (303) is provided on the honeycomb thermal expansion ring (301). The No. 3 through holes (303) are uniformly distributed in M ​​layers in the radial direction, and each layer is uniformly distributed in N layers in the circumferential direction. The high-temperature mica wire passes through M×N No. 3 through holes (303) in sequence.

2. The twenty-high mill backing roll for uniform bulging by electromagnetic induction heating according to claim 1, characterized in that: The support device (2) comprises a wafer (201), wherein the wafer (201) is fixedly connected to a frame, and a saddle ring (202) is connected to the lower surface of the wafer (201) by screws, wherein the inner circle of the saddle ring (202) is connected to the outer circle of a needle roller bearing (203), and the inner circle of the needle roller bearing (203) is connected to the outer ring of an eccentric ring (204), and the inner ring of the eccentric ring (204) is mounted on the core shaft (1) by means of a key connection.

3. The twenty-high mill backing roller for uniform bulging by electromagnetic induction heating according to claim 1, characterized in that: A heat-insulating ring (7) is installed between the electromagnetic control component (3) and the supporting device (2) to avoid heat loss and transfer.

4. The twenty-high mill backing roll for uniform bulging by electromagnetic induction heating according to claim 1, characterized in that: A heat insulating coating is provided in the contact area between the honeycomb heat expansion ring (301) and the bearing (4), and a heat insulating coating is provided in the contact area between the honeycomb heat expansion ring (301) and the core shaft (1), so as to prevent the honeycomb heat expansion ring (301) from transferring heat to the core shaft (1).

5. The twenty-high mill backing roll for uniform bulging by electromagnetic induction heating according to claim 1, characterized in that: Multiple layers of temperature sensors are evenly distributed radially between the electromagnetic control component (3) and the heat-insulating ring (7), with multiple temperature sensors evenly distributed on each layer. The temperature sensors are used to detect the temperature of the electromagnetic control component (3).

6. The twenty-high mill backing roller for uniform bulging by electromagnetic induction heating according to claim 1, characterized in that: The roller sleeve (302) is made of high-speed wear-resistant steel material, which prolongs the service life and rolling mileage of the electromagnetically controlled backing roller. When the roller sleeve (302) is severely worn, the roller sleeve (302) can be directly replaced, thereby reducing maintenance costs.

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