Temperature-adjustable rolling mill for rolling

Abstract

The application discloses a temperature-adjustable rolling mill for rolling piece processing and relates to the technical field of rolling equipment. The rolling mill comprises a rack, an upper compression roller, a lower compression roller, a gap adjusting part and a control system. The lower compression roller comprises a fixed mandrel, a hollow roller sleeve, a split movable block and a temperature adjusting assembly. When working, a worker adjusts the rolling gap between the upper compression roller and the lower compression roller through the gap adjusting part. Before rolling, the control system drives the split movable block to extend radially, so that the temperature adjusting assembly is close to the hollow roller sleeve for rapid preheating. After preheating is completed, the hollow roller sleeve rotates, the control system adjusts the power of the temperature adjusting assembly in the corresponding region according to temperature feedback, and cooperatively drives the split movable block to make radial fine adjustment, so that the temperature of different regions of the hollow roller sleeve is adjusted. The split movable block is expanded and contracted radially to cooperate with the temperature adjusting assembly to implement sectional heating and cooling. The application has the effect of sectional temperature control.

Description

Technical Field

[0001] This invention relates to the field of rolling equipment technology, specifically a temperature-adjustable rolling mill for processing rolled products. Background Technology

[0002] Rolling mills are core equipment in the metal pressure processing industry. Their working principle mainly involves using one or more rotating rolls that apply high pressure to continuously extrude metal slabs passing through the roll gap, causing them to undergo plastic deformation. This reduces the thickness of the sheet while improving its surface quality and mechanical properties. In modern industry, rolling mills are widely used in the production of sheet and strip materials of metal materials such as steel, aluminum alloys, and high-precision copper foil. They are indispensable basic processing equipment in fields such as automobile manufacturing, aerospace, high-precision electronic packaging, and new energy battery foil. Their rolling precision directly determines the quality of subsequent end products.

[0003] During continuous rolling, the heat from plastic deformation of the metal and the frictional heat from the roll gap are conducted to the rolls, causing a severe and uneven temperature rise. Traditional rolling mills mostly use external spray cooling media or internal water circulation to control the temperature. This makes it impossible to implement high-precision, localized, and independent dynamic heating or cooling for different axial regions of the rolls. This defect of unadjustable or insufficient temperature adjustment precision makes it easy for the rolls to undergo uneven thermal expansion in the axial direction due to uneven heating, which in turn leads to thermal crown deformation. This not only causes sheet and strip defects such as uneven thickness, edge waviness, and center waviness, but also causes thermal fatigue cracks in the rolls due to alternating thermal stress, which seriously restricts the processing quality of the sheet and the service life of the rolls. Summary of the Invention

[0004] The purpose of this invention is to provide a temperature-adjustable rolling mill for rolling processing, so as to solve the problem that traditional rolling mills in the prior art cannot perform segmented temperature control.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a temperature-adjustable rolling mill for rolling processing, comprising a frame, an upper pressure roll, a lower pressure roll, a gap adjustment component, and a control system. The upper pressure roll and the gap adjustment component are both mounted on the frame and connected to each other. The upper pressure roll and the gap adjustment component are both electrically connected to the control system. The upper pressure roll and the lower pressure roll have the same structure. The lower pressure roll includes a bearing housing, a temperature-adjustable pressure roll, and a drive element. The temperature-adjustable pressure roller includes a fixed mandrel, a hollow roller sleeve, segmented movable blocks, and a temperature regulating assembly. The bearing housing is mounted on the frame, and both ends of the fixed mandrel are mounted on the bearing housing. The fixed mandrel passes through the internal cavity of the hollow roller sleeve. Several groups of segmented movable blocks are spaced apart along the axial direction of the fixed mandrel, with each group containing multiple segmented movable blocks. The segmented movable blocks within the same group are arranged circumferentially along the outer periphery of the fixed mandrel. The temperature regulating assembly is mounted on the segmented movable blocks. The driving element is mounted on the bearing housing. A gear ring is provided on the outer surface of the hollow roller sleeve. A gear is connected to the output end of the driving element, and the gear meshes with the gear ring on the outer surface of the hollow roller sleeve. The segmented movable blocks and the temperature regulating assembly... Both the components and the driving elements are electrically connected to the control system. The driving element is a drive motor. The segmented movable block consists of independent hydraulic cylinders and movable blocks. The output end of each hydraulic cylinder is connected to the corresponding movable block. Before rolling, the operator adjusts the pressing distance between the upper and lower pressure rollers according to the thickness of the sheet material using the gap adjustment component to adapt to sheets of different thicknesses. During rolling, the operator drives the hydraulic cylinders of the segmented movable blocks through the control system. Several groups of segmented movable blocks extend outward radially in an orderly manner. The temperature regulating component moves synchronously with the segmented movable blocks towards the hollow roll sleeve. When the gap between the temperature regulating component and the inner wall of the hollow roll sleeve is reduced to a preset minimum value, the temperature is adjusted by... The regulating component heats the hollow roll sleeves, causing their temperature to rise rapidly to a set value. After preheating, the segmented movable block drives the temperature regulating component to slightly contract radially, preventing slight eccentric collisions caused by rolling impacts and high-speed rotation. Simultaneously, the operator operates the drive element via the control system, which rotates the two hollow roll sleeves, drawing the metal sheet into the roll gap. The rolling process begins. Temperature sensors rotating with the hollow roll sleeves continuously collect the temperature of different axial regions on the inner wall of the roll sleeves. When a localized area is detected to be too hot, the operator reduces or shuts down the heating power of the temperature regulating component's heating unit via the control system. The cooling unit sprays water to cool the area. If a local area is found to be too cold, the operator can shut down the cooling unit of the temperature regulating component in that area by operating the control system and increase the heating power of the heating unit of the temperature regulating component. To achieve rapid heat replenishment, the segmented movable block in that area can be driven to extend radially outward, bringing the heating unit of the temperature regulating component closer to the hollow roll sleeve. Through the dual linkage of reducing the gap and increasing the power, the hollow roll sleeve is rapidly heated. After rolling is completed, the operator can drive the segmented movable block to fully retract through the control system and simultaneously shut down the temperature regulating component. The cooling medium generated during the spraying process is discharged from the hollow roll sleeve through an externally connected pump. The equipment is completely stationary, waiting for the next cycle to start.

[0006] The temperature regulation component includes a heating component and a cooling component, which are alternately distributed along the axial direction of the fixed mandrel. Both the heating and cooling components are mounted on the segmented movable block. During rolling, the temperature of different axial regions of the hollow roll sleeve can be adjusted by independently starting and stopping the heating and cooling components at different axial positions. When rapid heating of the entire roll sleeve is required, all heating components work synchronously, and the segmented movable block extends close to the inner wall of the hollow roll sleeve, significantly shortening the heating time. When the temperature of the entire hollow roll sleeve or some areas is too high during rolling, the cooling components in the corresponding areas simultaneously start spraying to cool down, and the segmented movable block extends close to the inner wall of the hollow roll sleeve, quickly controlling the temperature of the hollow roll sleeve within the required range. This ensures both the flexibility of temperature regulation and the efficiency requirements of overall temperature adjustment.

[0007] The heating assembly includes an arc-shaped magnetic core and an electromagnetic coil. The arc-shaped magnetic core is embedded in a segmented movable block, and the electromagnetic coil is wound around the arc-shaped magnetic core. When adjusting the temperature, the electromagnetic coil is energized and together with the arc-shaped magnetic core, they generate an alternating magnetic field. This field generates eddy currents in the corresponding area of ​​the hollow roller sleeve through electromagnetic induction, thus raising the temperature. Compared with contact heating, it does not require overcoming gap thermal resistance, resulting in a faster temperature response. Furthermore, each arc-shaped heating unit is independently controlled, and with the radial position adjustment of the segmented movable block, the temperature control accuracy is higher, enabling independent temperature adjustment of the corresponding area.

[0008] The cooling assembly includes a cooling manifold mounted on a segmented movable block. Multiple cooling nozzles are obliquely arranged on the cooling manifold, with overlapping spray ranges between adjacent nozzles. During cooling operation, the cooling medium is sprayed from the cooling nozzles through the cooling manifold, directly onto the inner wall of the hollow roller sleeve for heat exchange and cooling. The overlapping spray ranges ensure uniform cooling of the rotating hollow roller sleeve's inner wall without dead angles, preventing localized over-cooling.

[0009] The fixed mandrel has a power bus inside, and the electromagnetic coil is connected to the power bus inside the fixed mandrel via a flexible wire. The electromagnetic coil is electrically connected to the control system. The fixed mandrel has a medium conduit inside, and the cooling manifold is connected to the medium conduit inside the fixed mandrel via a flexible delivery pipe. During temperature regulation, the power bus supplies power to each independent electromagnetic coil individually, and in conjunction with the control system, it can achieve individual adjustment of heating power in different areas. The flexible wire can adapt to the length changes during the radial expansion and contraction of the segmented movable block, avoiding damage to the wire due to pulling. The cooling medium is stably delivered to each cooling manifold through the medium conduit and the flexible delivery pipe. The flexible delivery pipe can also adapt to the expansion and contraction of the segmented movable block, ensuring the stability of the cooling medium delivery and preventing pipe blockage or damage due to the adjustment of the position of the segmented movable block.

[0010] The bottom of the fixed mandrel is provided with a liquid collection port along the axial direction. The inside of the fixed mandrel is provided with a medium return water pipe. The liquid collection port is connected to the medium return water pipe inside the fixed mandrel. The medium return water pipe is connected to the external pump body. After the rolling process is completed, the cooling medium after spraying heat exchange is collected at the liquid collection port at the bottom of the fixed mandrel and is drawn out by the external pump body through the medium return water pipe. This avoids the cooling medium from accumulating inside the hollow roller sleeve, ensuring that the inside of the equipment is dry and clean, and preparing it in advance for the next use.

[0011] A temperature sensor is installed on the inner surface of the hollow roll sleeve, and a vision sensor is installed on the frame. Both the temperature sensor and the vision sensor are electrically connected to the control system. Before rolling, the operator uses the vision sensor to detect the gap between the upper and lower pressure rolls, presets different rolling gaps according to the thickness of the plate, and adjusts the gap adjustment components to ensure that the rolling gap meets the processing requirements. During the rolling process, the temperature sensor can rotate with the hollow roll sleeve to collect the inner wall temperature data at different axial positions in real time and transmit it synchronously to the control system. The control system automatically compares the collected temperature with the set temperature range and automatically triggers the power adjustment of the heating or cooling components in the corresponding area to achieve precise temperature control of different areas of the roll sleeve, ensuring temperature stability during the rolling process and effectively improving the quality of the finished product.

[0012] The gap adjustment component includes a drive source and a lead screw. One end of the lead screw is connected to the output end of the drive source, and the other end of the lead screw passes through the frame and is connected to the upper pressure roller. The frame is provided with a moving groove, and the upper pressure roller is slidably mounted on the moving groove. The drive source is a drive motor. Before rolling, the operator, according to the required thickness of the sheet to be rolled, drives the lead screw to rotate through the drive source, causing the upper pressure roller to slide along the moving groove of the frame, thereby precisely adjusting the rolling gap between the upper and lower pressure rollers. No manual alignment adjustment is required. With the gap detection of the vision sensor, the gap can be quickly adjusted to the preset size, effectively improving the adjustment efficiency of processing different specifications and adapting to the processing needs of various rolled parts of different thicknesses.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, through the cooperation of segmented movable blocks and temperature regulation components, enables the temperature sensor to detect the axial temperature of the hollow roll sleeve online during the rolling process. If the temperature in a local area is too low, the control system activates the hydraulic cylinder of the corresponding segmented movable block to extend the local area again to shorten the heat transfer air gap, and simultaneously increases the heating power of the electromagnetic coil to achieve rapid heat replenishment. This structure breaks through the bottleneck of large thermal lag and slow temperature rise response in traditional rolling mill temperature control. Through the dual linkage of mechanical displacement and electrical energy output, it eliminates the large thermal resistance of the air gap, and can perform local non-contact rapid and precise control on the differences in heat accumulation and dissipation in different areas of the roll axial direction. It suppresses the non-uniform "thermal crown" deformation of the hollow roll sleeve caused by uneven heating during rolling, ensures the transverse consistency of the metal sheet thickness and the flatness of the sheet shape, effectively reduces processing defects such as edge waviness and center waviness, and significantly improves the quality of the rolled product.

[0014] 2. This invention, through the cooperation of segmented movable blocks and cooling components, when a local area temperature is detected to be too high, the cooling manifold sprays cooling medium to exchange heat and cool the hollow roller sleeve. The cooling nozzles are arranged in a cross-sloping manner, so that the jet range overlaps in space. This solves the problem of cooling dead angles that are easy to occur when the segmented movable blocks move radially back and forth or are arranged separately. It ensures that the inner wall of the rotating hollow roller sleeve obtains uniform and continuous physical heat exchange, and prevents local temperature difference stress concentration caused by excessive local temperature gradient inside the roller sleeve, thereby significantly extending the structural service life of the hollow roller sleeve. Attached Figure Description

[0015] Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is a structural diagram of the upper and lower pressure rollers of the present invention; Figure 3 This is a diagram showing the internal structure of the temperature-adjustable pressure roller of the present invention. Figure 4 For the present invention Figure 3A magnified view of a portion of region A in the middle; Figure 5 This is an overall isometric view of the present invention; Figure 6 This is a half-sectional view of the temperature-adjustable pressure roller of the present invention; Figure 7 For the present invention Figure 6 A magnified view of a portion of region B in the middle.

[0016] In the diagram: 1. Frame; 2. Upper pressure roller; 3. Lower pressure roller; 30. Bearing seat; 31. Temperature-adjustable pressure roller; 311. Fixed mandrel; 312. Hollow roller sleeve; 313. Split-type movable block; 314. Temperature adjustment component; 315. Heating component; 3151. Arc-shaped magnetic core; 3152. Electromagnetic coil; 316. Cooling component; 3161. Cooling manifold; 32. Drive element; 4. Gap adjustment component; 41. Drive source; 42. Lead screw. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Specific Implementation Example 1: As shown in the example Figures 1-5 As shown, the present invention provides a technical solution: a temperature-adjustable rolling mill for rolling processing, comprising a frame 1, an upper pressure roller 2, a lower pressure roller 3, a gap adjustment component 4, and a control system. The upper pressure roller 2 and the gap adjustment component 4 are both mounted on the frame 1 and are connected to each other. The upper pressure roller 2 and the gap adjustment component 4 are both electrically connected to the control system. The upper pressure roller 2 and the lower pressure roller 3 have the same structure. The lower pressure roller 3 includes a bearing seat 30, a temperature-adjustable pressure roller 31, and a drive element 32. The temperature-adjustable pressure roller 31 includes a fixed spindle 311, a hollow roller sleeve 312, segmented movable blocks 313, and a temperature regulating component 314. A bearing seat 30 is mounted on the frame 1. Both ends of the fixed spindle 311 are mounted on the bearing seat 30. The fixed spindle 311 passes through the internal cavity of the hollow roller sleeve 312. Several groups of segmented movable blocks 313 are spaced apart along the axial direction of the fixed spindle 311. Each group contains multiple segmented movable blocks 313. The segmented movable blocks 313 within the same group are arranged circumferentially along the outer periphery of the fixed spindle 311. The temperature regulating component 314 is mounted on the segmented movable blocks 313. A drive element 32 is mounted on the bearing seat 30. A toothed ring is provided on the outer surface of the hollow roller sleeve 312. The output end of the drive element 32 is connected to a toothed... The wheel, gear, and toothed ring on the outer surface of the hollow roller sleeve 312 are meshed and connected. The segmented movable block 313, temperature regulating component 314, and drive element 32 are all electrically connected to the control system. The drive element 32 is a drive motor. The segmented movable block 313 consists of an independent hydraulic cylinder and a movable block. The output end of each hydraulic cylinder is connected to the corresponding movable block. Before rolling, the operator adjusts the pressing gap between the upper pressure roller 2 and the lower pressure roller 3 according to the thickness of the plate to adapt to plates of different thicknesses. During rolling, the operator drives the hydraulic cylinder of the segmented movable block 313 through the control system. Several groups of segmented movable blocks 313 extend outward radially in an orderly manner. The temperature regulating component 314 follows the segmented movable block. The movable block 313 moves synchronously towards the hollow roll sleeve 312, reducing the gap between the temperature regulating component 314 and the inner wall of the hollow roll sleeve 312 to a preset minimum value. The temperature regulating component 314 then heats the hollow roll sleeve 312, causing its temperature to rise rapidly to the set value. After preheating, the segmented movable block 313 drives the temperature regulating component 314 to slightly contract radially, preventing rolling impact and slight eccentric collisions caused by high-speed rotation. Simultaneously, the operator operates the drive element 32 through the control system. The drive element 32 drives the two hollow roll sleeves 312 to rotate, and the metal sheet is drawn into the roll gap by the hollow roll sleeves 312, initiating the rolling process. The metal sheet rotates together with the hollow roll sleeves 312. The rotating temperature sensor collects the temperature of different axial regions on the inner wall of the roller sleeve in real time. When a local area is detected to be too hot, the operator reduces or shuts down the heating power of the heating unit of the temperature regulating component 314 through the operation control system. At the same time, the cooling unit of the temperature regulating component 314 sprays water to cool down the area. If a local area is detected to be too cold, the operator shuts down the cooling unit of the temperature regulating component 314 in that area through the operation control system and increases the heating power of the heating unit of the temperature regulating component 314. To achieve rapid heat replenishment, the segmented movable block 313 in that area can be driven to extend radially outward, bringing the heating unit of the temperature regulating component 314 closer to the hollow roller sleeve 312. Through the dual linkage of reducing the gap and increasing the power,The hollow roller sleeve 312 is rapidly heated. After rolling, the operator uses the control system to drive the segmented movable block 313 to fully retract and simultaneously shuts off the temperature regulating component 314. The cooling medium generated during the spraying process is discharged from the hollow roller sleeve 312 through an externally connected pump. The equipment then comes to a complete stop, awaiting the next cycle.

[0019] The bottom of the fixed mandrel 311 is provided with a liquid collection port along the axial direction. The fixed mandrel 311 is equipped with a medium return water pipe. The liquid collection port is connected to the medium return water pipe inside the fixed mandrel 311. The medium return water pipe is connected to the external pump body. After the rolling process is completed, the cooling medium after spraying heat exchange is collected at the liquid collection port at the bottom of the fixed mandrel 311 and is drawn out by the external pump body through the medium return water pipe. This avoids the cooling medium from accumulating inside the hollow roller sleeve 312, ensuring that the inside of the equipment is dry and clean, and preparing it in advance for the next use.

[0020] A temperature sensor is installed on the inner surface of the hollow roll sleeve 312, and a vision sensor is installed on the frame 1. Both the temperature sensor and the vision sensor are electrically connected to the control system. Before rolling, the operator uses the vision sensor to detect the gap between the upper pressure roll 2 and the lower pressure roll 3. Different rolling gaps are preset according to the thickness of the plate, and the gap adjustment component 4 is adjusted to ensure that the rolling gap meets the processing requirements. During the rolling process, the temperature sensor can rotate with the hollow roll sleeve 312 to collect the inner wall temperature data at different axial positions in real time and transmit it synchronously to the control system. The control system automatically compares the collected temperature with the set temperature range and automatically triggers the power adjustment of the corresponding area heating component 315 or cooling component 316 to achieve precise temperature control of different areas of the roll sleeve, ensuring temperature stability during the rolling process and effectively improving the finished product quality of the rolled product.

[0021] The gap adjustment component 4 includes a drive source 41 and a lead screw 42. One end of the lead screw 42 is connected to the output end of the drive source 41, and the other end of the lead screw 42 passes through the frame 1 and is connected to the upper pressure roller 2. The frame 1 is provided with a moving groove, and the upper pressure roller 2 is slidably mounted on the moving groove. The drive source 41 is a drive motor. Before rolling, the operator, according to the required thickness of the plate to be rolled, drives the lead screw 42 to rotate through the drive source 41, which drives the upper pressure roller 2 to slide along the moving groove of the frame 1, thereby precisely adjusting the rolling gap between the upper pressure roller 2 and the lower pressure roller 3. No manual alignment adjustment is required. With the gap detection of the vision sensor, the gap can be quickly adjusted to the preset size, effectively improving the adjustment efficiency of processing different specifications and adapting to the processing needs of various rolled parts of different thicknesses.

[0022] Specific Implementation Example 2: As shown in the example Figures 6-7As shown, a temperature regulating component 314 different from that in Embodiment 1 is provided. The difference is that this embodiment uses the radial expansion and contraction of the segmented movable block 313 in conjunction with the heating component 315 and the cooling component 316 to implement segmented heating and cooling. Through the dual linkage of mechanical displacement and power regulation, local non-contact rapid and precise regulation can be performed to address the differences in heat accumulation and dissipation in different areas of the roll axial direction.

[0023] Specifically, the temperature regulating component 314 includes a heating component 315 and a cooling component 316. The heating component 315 and cooling component 316 are alternately distributed along the axial direction of the fixed mandrel 311. Both the heating component 315 and cooling component 316 are mounted on the segmented movable block 313. During rolling, the temperature of different axial regions of the hollow roll sleeve 312 can be specifically adjusted by independently starting and stopping the heating component 315 and cooling component 316 at different axial positions. When rapid heating of the entire roll sleeve is required, all... The heating component 315 works synchronously, and the segmented movable block 313 extends as a whole close to the inner wall of the hollow roll sleeve 312, which greatly shortens the heating time. When the temperature of the hollow roll sleeve 312 as a whole or in part is too high during the rolling process, the cooling component 316 in the corresponding area starts spraying to cool down. In conjunction with the segmented movable block 313 extending as a whole close to the inner wall of the hollow roll sleeve 312, the temperature of the hollow roll sleeve 312 is quickly controlled within the required range, which ensures both the flexibility of temperature adjustment and the efficiency requirements of overall temperature adjustment.

[0024] The heating assembly 315 includes an arc-shaped magnetic core 3151 and an electromagnetic coil 3152. The arc-shaped magnetic core 3151 is embedded in the segmented movable block 313, and the electromagnetic coil 3152 is wound around the arc-shaped magnetic core 3151. When adjusting the temperature, the electromagnetic coil 3152 is energized and together with the arc-shaped magnetic core 3151, they generate an alternating magnetic field. This field generates eddy currents in the corresponding area of ​​the hollow roller sleeve 312 through electromagnetic induction, thereby raising the temperature. Compared with contact heating, there is no need to overcome the gap thermal resistance, the temperature rise response is faster, and each arc-shaped heating unit is independently controlled. With the radial position adjustment of the segmented movable block 313, the temperature control accuracy is higher, and independent temperature adjustment of the corresponding area can be achieved.

[0025] The cooling assembly 316 includes a cooling manifold 3161, which is mounted on the split movable block 313. Multiple cooling nozzles are obliquely arranged on the cooling manifold 3161, and the spray ranges of the cooling nozzles of adjacent cooling manifolds 3161 have overlapping areas. During cooling operation, the cooling medium is sprayed out from the cooling nozzles through the cooling manifold 3161 and directly sprayed onto the inner wall of the hollow roller sleeve 312 for heat exchange and cooling. The overlapping spray ranges achieve uniform cooling of the inner wall of the rotating hollow roller sleeve 312 without dead angles, avoiding local over-cooling.

[0026] The fixed mandrel 311 has a power bus inside. The electromagnetic coil 3152 is connected to the power bus inside the fixed mandrel 311 through a flexible wire. The electromagnetic coil 3152 is electrically connected to the control system. The fixed mandrel 311 has a medium conduit inside. The cooling manifold 3161 is connected to the medium conduit inside the fixed mandrel 311 through a flexible delivery pipe. During temperature regulation, the power bus supplies power to each independent electromagnetic coil 3152 individually. With the help of the control system, the heating power of different areas can be adjusted individually. The flexible wire can adapt to the length change when the segmented movable block 313 expands and contracts radially, avoiding damage to the wire. The cooling medium is stably delivered to each cooling manifold 3161 through the medium conduit and the flexible delivery pipe. The flexible delivery pipe can also adapt to the expansion and contraction of the segmented movable block 313, ensuring the stability of the cooling medium delivery and preventing pipe blockage or damage due to the adjustment of the position of the segmented movable block 313.

[0027] Working principle of the invention: Before processing begins, the operator uses a vision sensor on the frame 1 to detect the initial gap between the upper pressure roller 2 and the lower pressure roller 3. Based on the thickness of the material to be processed, the operator activates the drive source 41 in the gap adjustment component 4 through the control system. The drive source 41 drives the lead screw 42 to rotate, causing the upper pressure roller 2 to slide along the moving groove of the frame 1, adjusting the pressing gap between the upper pressure roller 2 and the lower pressure roller 3 to the preset target processing size.

[0028] After the pre-piercing gap is adjusted, the staff starts the independent hydraulic cylinders corresponding to each segmented movable block 313 through the control system. The multiple segmentsed movable blocks 313 extend outward radially in an orderly manner, driving the heating components 315 on them to move synchronously towards the hollow roller sleeve 312, reducing the gap between the heating components 315 and the inner wall of the hollow roller sleeve 312 to a preset minimum value.

[0029] Subsequently, the staff energizes the electromagnetic coil 3152 of the heating component 315 through the power bus and flexible wire inside the fixed spindle 311. The energized electromagnetic coil 3152 generates an alternating magnetic field with the arc-shaped magnetic core 3151, which induces eddy currents in the hollow roller sleeve 312 and causes it to heat up rapidly. Heating stops when the temperature of the hollow roller sleeve 312 reaches the set preheating value.

[0030] After preheating, the hydraulic cylinder of the split movable block 313 drives the temperature regulating component 314 to slightly contract inward radially, so that the temperature regulating component 314 maintains a safe gap with the inner wall of the roll sleeve, preventing slight eccentric collision caused by rolling impact and high-speed rotation.

[0031] At the same time, the staff operates the drive element 32 through the control system. The drive element 32 drives the two hollow roller sleeves 312 to start rotating synchronously. The metal sheet is carried into the roll gap by the rotating hollow roller sleeves 312. During the rolling process, the temperature sensor that rotates with the hollow roller sleeves 312 collects the temperature of different axial areas of the inner wall of the hollow roller sleeves 312 in real time and transmits the data synchronously to the control system.

[0032] When a local area temperature is detected to be too high, the control system reduces or shuts down the heating power of the heating component 315 in that area, and at the same time starts the cooling manifold 3161 of the cooling component 316 in that area. The cooling medium enters the cooling manifold 3161 through the medium conduit and flexible conveying pipe inside the fixed spindle 311, and is sprayed out from the cooling nozzles with overlapping areas, so as to uniformly cool the inner wall of the rotating hollow roller sleeve 312 without dead angles.

[0033] When a local area is detected to be too cold, the control system shuts down the cooling component 316 in that area and increases the heating power of the heating component 315 in the corresponding area. If rapid reheating is required, the control system drives the independent hydraulic cylinder corresponding to that area to extend the segmented movable block 313 radially outward, pushing the heating component 315 closer to the hollow roller sleeve 312. Through the dual linkage of reducing the gap and increasing the heating power, the hollow roller sleeve 312 is rapidly heated.

[0034] After the rolling process is completed, the operator drives the hydraulic cylinders of each segmented movable block 313 to fully retract and reset through the control system, and simultaneously shuts down the heating component 315 and the cooling component 316. The excess cooling medium generated during the spray cooling process collects at the bottom of the cavity of the hollow roller sleeve 312, enters the medium return water pipe through the liquid collection port at the bottom of the fixed mandrel 311, and is pumped out by the externally connected pump body. The hollow roller sleeve 312 stops rotating, the equipment is completely still, and waits for the next cycle to start.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A temperature-adjustable rolling mill for processing rolled products, characterized in that: The machine includes a frame (1), an upper pressure roller (2), a lower pressure roller (3), a gap adjustment component (4), and a control system. The upper pressure roller (2) and the gap adjustment component (4) are both mounted on the frame (1). The upper pressure roller (2) and the gap adjustment component (4) are connected to each other. The upper pressure roller (2) and the gap adjustment component (4) are both electrically connected to the control system. The upper pressure roller (2) and the lower pressure roller (3) have the same structure. The lower pressure roller (3) includes a bearing seat (30), a temperature-adjustable pressure roller (31), and a drive element (32). The temperature-adjustable pressure roller (31) includes a fixed mandrel (311), a hollow roller sleeve (312), segmented movable blocks (313), and a temperature regulating assembly (314). The bearing seat (30) is mounted on the frame (1). The two ends of the fixed mandrel (311) are mounted on the bearing seat (30). The fixed mandrel (311) passes through the internal cavity of the hollow roller sleeve (312). Several groups of segmented movable blocks (313) are arranged at intervals along the axial direction of the fixed mandrel (311). Each group contains multiple segmented movable blocks (313). The segmented movable block (313) is arranged circumferentially along the outer periphery of the fixed spindle (311). The temperature regulating component (314) is set on the segmented movable block (313). The driving element (32) is set on the bearing seat (30). The outer surface of the hollow roller sleeve (312) is provided with a gear ring. The output end of the driving element (32) is connected to a gear. The gear meshes with the gear ring on the outer surface of the hollow roller sleeve (312). The segmented movable block (313), the temperature regulating component (314) and the driving element (32) are all electrically connected to the control system. The temperature regulating component (314) includes a heating component (315) and a cooling component (316), which are alternately distributed along the axial direction of the fixed spindle (311). Both the heating component (315) and the cooling component (316) are mounted on the segmented movable block (313).

2. The temperature-adjustable rolling mill for rolling mill processing according to claim 1, characterized in that: The heating assembly (315) includes an arc-shaped magnetic core (3151) and an electromagnetic coil (3152). The arc-shaped magnetic core (3151) is embedded in a segmented movable block (313), and the electromagnetic coil (3152) is wound around the arc-shaped magnetic core (3151).

3. A temperature-adjustable rolling mill for rolling mill processing according to claim 2, characterized in that: The cooling assembly (316) includes a cooling manifold (3161) which is disposed on a split movable block (313). The cooling manifold (3161) is provided with a plurality of cooling nozzles at an angle, and the spray ranges of the cooling nozzles of adjacent cooling manifolds (3161) have overlapping areas.

4. A temperature-adjustable rolling mill for rolling mill processing according to claim 3, characterized in that: The fixed mandrel (311) is provided with a power bus inside. The electromagnetic coil (3152) is connected to the power bus inside the fixed mandrel (311) through a flexible wire. The electromagnetic coil (3152) is electrically connected to the control system. The fixed mandrel (311) is provided with a medium conduit inside. The cooling manifold (3161) is connected to the medium conduit inside the fixed mandrel (311) through a flexible delivery pipe.

5. A temperature-adjustable rolling mill for rolling mill processing according to claim 4, characterized in that: The bottom of the fixed mandrel (311) is provided with a liquid collection port along the axial direction. The inside of the fixed mandrel (311) is provided with a medium return water pipe. The liquid collection port is connected to the medium return water pipe inside the fixed mandrel (311). The medium return water pipe is connected to the external pump body.

6. A temperature-adjustable rolling mill for rolling mill processing according to claim 1, characterized in that: A temperature sensor is provided on the inner surface of the hollow roller sleeve (312), and a vision sensor is provided on the frame (1). Both the temperature sensor and the vision sensor are electrically connected to the control system.

7. A temperature-adjustable rolling mill for rolling workpiece processing according to claim 1, characterized in that: The gap adjustment component (4) includes a drive source (41) and a lead screw (42). One end of the lead screw (42) is connected to the output end of the drive source (41), and the other end of the lead screw (42) passes through the frame (1) and is connected to the upper pressure roller (2). A moving groove is provided on the frame (1), and the upper pressure roller (2) is slidably disposed on the moving groove.

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