A short stress path rolling mill core and roll gap adjustment method

Abstract

The present application belongs to the technical field of steel production equipment, and relates to a short stress line rolling mill core and a roll gap adjustment method. The rolling mill adopts a short stress line rolling mill core to automatically adjust the roll gap. The short stress line rolling mill core comprises a rack and a horizontal roller system. The horizontal roller system comprises an upper roller system and a lower roller system. The horizontal roller system further comprises a pull rod assembly and a double-drive screwdown device. The double-drive screwdown device is fixedly arranged on the rack and connected with the pull rod assembly. The upper roller system and the lower roller system are sleeved on the pull rod assembly. The double-drive screwdown device drives the upper roller system and the lower roller system to move up and down through the pull rod assembly, so as to adjust the roll gap of the horizontal roller system. In the present application, the upper roller and the lower roller of the horizontal roller system can move up and down independently, the roll gap adjustment of the rolling mill is more flexible, and the roll gap of the horizontal roller system can be automatically adjusted up and down according to the specifications of the rolled piece, thereby solving the problems of large impact when the existing short stress line rolling mill feeds in the steel and the limitations of the production of steel profiles.

Description

Technical Field

[0001] The invention belongs to the technical field of steel production equipment and relates to a short stress line rolling mill core and a roll gap adjustment method. Background Art

[0002] Short-stress line mills, with their advantages of high rigidity and light weight, are widely used for rolling rebar, round steel, flat steel, and small sections. Traditional short-stress line mills feature symmetrical roll gap adjustment and a fixed rolling line method, with the mill's rolling line elevation being fixed. However, for materials of varying specifications, the height of the workpiece varies relative to the rolling line elevation, creating a height difference between the workpiece's centerline and the rolling line. This increases the impact force of the workpiece during rolling, making it more difficult for the mill to bite the steel. The traditional solution involves adding a steel feeding device to the mill entrance, which increases the cost of the rolling line and limits production efficiency. Furthermore, the difficulty in connecting the rolling line leads to steel pile-up accidents. The equipment added to ensure smooth rolling of the workpiece in traditional short-stress line mills is relatively complex, and the processing cost is also high.

[0003] There are many limitations in rolling steel sections using traditional short stress line universal rolling mills. The horizontal center of the vertical roll system and the center of the horizontal roll gap are always at the same height. When the hole groove of the vertical roll system is processed off-center, it cannot be adjusted and can only be reprocessed. For special asymmetric steel sections, the horizontal center of the vertical roll system and the center of the horizontal roll gap need to form a height difference. If the hole groove of the vertical roll system is processed off-center, the vertical roll system will be subjected to uneven force, and the types of rolling are very limited, making it difficult to meet the rolling conditions.

[0004] Traditional roll gap detection methods for short-stress rolling mills use a rotary encoder to measure the number of tie rod rotations and, by adding the thread lead, infer the roll gap size of the horizontal roll system. This method, after offline roll gap adjustment and roll replacement, does not reveal the actual roll gap size. This method is significantly affected by thread machining accuracy and thread wear, making automatic roll gap adjustment difficult. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to solve the problem of the height difference between the center line of the rolled piece and the elevation of the rolling line during the steel rolling process, and to provide a short stress line rolling mill core and roll gap adjustment method to provide a solution for automatically adjusting the roll gap, thereby solving the limitation problem of rolling steel sections by rolling short stress line rolling mills, and at the same time reducing the investment cost of the rolling line and improving production efficiency.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A short stress line rolling mill core comprises a frame and a horizontal roller system arranged on the frame, the horizontal roller system comprises an upper roller system and a lower roller system, the horizontal roller system further comprises a tie rod assembly and a dual-drive press-down device; the dual-drive press-down device is fixedly mounted on the frame and connected to the tie rod assembly, the upper roller system and the lower roller system are both mounted on the tie rod assembly; the dual-drive press-down device drives the upper roller system and the lower roller system to move up and down separately through the tie rod assembly to adjust the roller gap of the horizontal roller system of the rolling mill.

[0008] Furthermore, the dual-drive pressing device includes an upper driving component and a lower driving component arranged in upper and lower layers; the pull rod assembly includes a pull rod, an upper pull rod threaded sleeve, an upper bearing seat, and a lower bearing seat; the upper bearing seat and the lower bearing seat are both fixed with threaded sleeves; the upper roller is arranged on the upper bearing seat, and the lower roller is arranged on the lower bearing seat;

[0009] The upper pull rod threaded sleeve is sleeved on the pull rod and rotates with the pull rod; the threaded sleeve on the upper bearing seat is sleeved on the upper pull rod threaded sleeve and is connected to the upper pull rod threaded sleeve through a thread; the lower driving component is connected to one end of the upper pull rod threaded sleeve and drives the upper pull rod threaded sleeve to rotate, thereby driving the upper bearing seat to move up and down through the threaded sleeve;

[0010] The threaded sleeve on the lower bearing seat is sleeved on the pull rod and is connected to the pull rod through threads; the upper driving component is connected to one end of the pull rod and drives the pull rod to rotate, thereby driving the lower bearing seat to move up and down through the threaded sleeve.

[0011] Furthermore, the frame includes a tie rod support and two guide beams; the guide beam is a bilaterally symmetrical rectangular structure, and each guide beam is provided with a tie rod support on both sides, and the tie rod support is fixedly connected to the guide beam;

[0012] The pull rod support is provided with a support hole, the pull rod is rotatably arranged in the support hole, and passes through the support hole to be connected to the lower bearing seat; the upper bearing seat and the lower bearing seat are respectively arranged at the two ends of the pull rod support, and slide with the pull rod support.

[0013] Furthermore, a convex circle is provided in the middle of the pull rod, and a pressure ring is provided at one end of the support hole. The pressure ring is fixedly connected to the pull rod support and pressed against the end surface of the convex circle to prevent the pull rod from axial movement.

[0014] Furthermore, the guide beam is provided with a bayonet, and the tie rod support is clamped in the bayonet; the middle of the tie rod support is provided with two U-shaped notches for fixed connection, and the rolling mill core is fixedly installed on the rolling mill base through the U-shaped notches.

[0015] Furthermore, the tie rod support is provided with a displacement sensor assembly, comprising a sensor body and a sensor movement detection end. The tie rod support is provided with grooves at both ends, one groove corresponding to the upper bearing seat and the other corresponding to the lower bearing seat. Each groove houses a sensor assembly, with the sensor body fixedly mounted within the groove and the sensor movement detection end fixedly mounted on the upper or lower bearing seat. The displacement sensor assembly detects the position of the upper and lower rolls of the horizontal roll system by detecting positional changes between the tie rod support and the upper and lower bearing seats, thereby detecting the roll gap of the horizontal roll system.

[0016] Furthermore, it also includes a contour sensor and a remote control system. The contour sensor is arranged on the exit side of the rolling mill and is used to detect the size of the rolled piece coming out of the rolling mill; the displacement sensor assembly, the contour sensor, and the dual-drive pressing device are all connected to the remote control system. The remote control system controls the dual-drive pressing device to adjust the roll gap based on the feedback information of the displacement sensor assembly and the contour sensor.

[0017] Furthermore, it also includes a vertical roll system located between the upper and lower roll systems. A rolling mill core equipped with only a horizontal roll system and no vertical roll system is used for a short-stress line two-high rolling mill core; a rolling mill core equipped with both a horizontal roll system and a vertical roll system is used for a short-stress line four-high rolling mill core or a short-stress line universal rolling mill core.

[0018] A method for adjusting the roll gap of a short stress line rolling mill employs the aforementioned short stress line rolling mill core. Based on the specifications of the workpiece, the upper drive component of a dual-drive screw-down device drives the pull rod to rotate, which drives the threaded sleeve in the lower bearing seat to move up and down along the pull rod, thereby causing the lower bearing seat and the lower roll system to move up and down together. The lower drive component of the dual-drive screw-down device also drives the upper pull rod threaded sleeve to rotate, which drives the threaded sleeve in the upper bearing seat to move up and down along the upper pull rod threaded sleeve, thereby causing the upper bearing seat and the upper roll system to move up and down together, thereby achieving roll gap adjustment of the horizontal roll system. Different workpieces require different rolling centerlines when rolling. Only the upper and lower roll systems of the horizontal roll system need to be individually adjusted to the required roll gap position, eliminating height differences between the workpieces and the mill centerline and reducing the impact force of the workpieces feeding into the steel. For special asymmetric steel and when the hole groove of the vertical roll system is processed off-center, a height difference needs to be formed between the center of the vertical roll system and the center of the roll gap of the horizontal roll system. Based on the actual center line of the vertical roll system, the upper and lower roll systems of the horizontal roll system are adjusted to the required height value separately to adapt to the height difference between the horizontal center of the vertical roll system and the center of the roll gap of the horizontal roll system.

[0019] Furthermore, before rolling, the remote control system first adjusts the roll gap of the horizontal roll system based on the specifications of the rolled product, the roll ring diameter of the horizontal roll system, and the position information of the upper roll system and the lower roll system fed back by the displacement sensor assembly; during the rolling process, the remote control system controls the dual-drive pressing device to correct the roll gap of the horizontal roll system based on the rolled product profile information fed back by the profile sensor, thereby realizing online automatic correction of the rolling mill roll gap; during the roll gap adjustment process of the horizontal roll system, the horizontal roll system position detection and the horizontal roll system levelness detection are performed through multiple displacement sensor assemblies.

[0020] The beneficial effects of the present invention are:

[0021] 1) In the short stress line rolling mill core of the present invention, the upper and lower rolls of the horizontal roll system can be moved up and down independently, the mill roll gap adjustment is more flexible, and the center line elevation of the horizontal roll system can be adjusted up and down according to the specifications of the rolled product, solving the problem of the height difference between the center line of the rolled product and the rolling line elevation, solving the limitation problem of short stress line universal rolling of steel sections, and providing a solution for the short stress line rolling mill to change from fixed rolling center line rolling to variable rolling line rolling.

[0022] 2) The present invention is applicable to all short-stress line rolling mills and can be used for rolling threaded steel bars, round steel, flat steel, and section steel. A mill core equipped with only a horizontal roll system and no vertical roll system can be used as a short-stress line two-roll mill core; a mill core equipped with both a horizontal roll system and a vertical roll system can be used as a short-stress line universal mill. When rolling symmetrical cross-section steel, if deviations occur in the vertical roll system hole processing, the problem can be corrected by simply adjusting the horizontal roll system centerline height. When rolling asymmetric section steel, the vertical roll rolling centerline remains unchanged, and the horizontal roll system rolling centerline can be adjusted to the offset required for the asymmetric section steel, thus resolving the limitations of existing short-stress line section steel rolling.

[0023] 3) The dual-drive pressing device in the present invention provides power for the upper and lower rolls of the horizontal roller system separately, so as to realize the separate lifting and lowering adjustment of the upper and lower rolls of the horizontal roller system. Compared with the traditional short stress rolling mill (the upper and lower rolls are adjusted at the same time), the power required to adjust the mill roll gap of the same type of machine is reduced by about 50%.

[0024] 4) The present invention utilizes a displacement sensor assembly to detect the displacement changes of the upper (lower) bearing seat and the tie rod support to detect the position of the upper and lower rollers of the horizontal roll system, directly detecting the size of the roll gap and the elevation of the centerline of the horizontal roll system. Even after adjusting the horizontal roll system offline, the position change of the horizontal roll system can be known after returning to the line, providing a solution for automatically adjusting the roll gap of short-stress rolling mills. In addition, the combination of multiple displacement sensors can also detect the horizontality of the horizontal roll system and the location of internal faults in its tie rods. The contour sensor detects the size of the rolled piece coming out of the rolling mill in real time, thereby automatically correcting the roll gap of the horizontal roll system, ensuring the production size of the rolled piece, and effectively improving the production yield rate.

[0025] 5) The short stress line rolling mill core of the present invention has a support point in the middle of the tie rod support, that is, in the middle of the entire rolling mill core, which can reduce the installation height of the entire rolling mill, has better impact resistance, and makes the equipment more stable.

[0026] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a cross-sectional schematic diagram of the present invention (YY cross-sectional view);

[0030] Figure 3 Schematic diagram of the pull rod structure in the present invention;

[0031] Figure 4 This is a schematic structural diagram of the threaded sleeve of the upper pull rod in the present invention;

[0032] Figure 5 This is a front view of the tie rod support structure of the present invention;

[0033] Figure 6 This is a schematic diagram of the back side of the tie rod support structure in the present invention;

[0034] Figure 7 This is a schematic diagram of the structure of the guide beam in the present invention;

[0035] Figure 8 It is a schematic diagram of the roller gap adjustment transmission of the present invention.

[0036] Figure 9 Schematic diagram of the roller gap adjustment control principle of the present invention.

[0037] Reference numerals: 1-tie rod assembly; 2-dual drive pressing device; 3-guide beam; 4-horizontal roller system; 5-vertical roller system; 6-lower bearing seat; 7-threaded sleeve; 8-tie rod; 9-tie rod support; 10-spacer; 11-pressure ring; 12-circular ring; 13-upper tie rod threaded sleeve; 14-bearing; 15-locking nut; 16-upper bearing seat; 17-transparent cover; 18-displacement sensor assembly; 19-shield; 20-long stud; 21-block Block; 31-bayonet; 32-guide installation hole; 81-spline; 82-locking thread; 83-bearing installation position; 84-optical axis; 85-convex circle; 86-lifting thread; 91-support hole; 92-upper groove; 93-lower groove; 94-lifting ear; 95-lower guide installation step; 96-upper guide installation step; 97-U-shaped notch; 98-vertical roller system installation hole; 131-optical hole; 132-spline; 133-lifting thread. DETAILED DESCRIPTION

[0038] The following describes the embodiments of the present invention by means of specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0039] Among them, the accompanying drawings are only for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting the present invention. In order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the dimensions of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the accompanying drawings.

[0040] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0041] See also Figures 1 to 9 The core of a short-stress line rolling mill comprises a tie rod assembly 1, a dual-drive screw-down device 2, a guide beam 3, a horizontal roll system 4, and a vertical roll system 5. Two pairs of guide beams 3 are connected to two pairs of tie rod assemblies 1, and are fixed to the tie rod supports 9 of the tie rod assemblies 1 via long studs 20, forming a machine frame. The dual-drive screw-down device 2 is mounted above the tie rod assembly 1. The horizontal roll system 4 comprises an upper roll system and a lower roll system. The upper roll system is supported on the tie rod assembly 1 by an upper bearing block 16, while the lower roll system is supported on the tie rod assembly 1 by a lower bearing block 6. The two pairs of vertical roll systems 5 are mounted on the left and right pairs of tie rod supports 9, respectively.

[0042] In this embodiment, the upper driving component and the lower driving component of the dual-drive pressing device 2 are composed of two sets of traditional short stress rolling mill pressing devices combined upper and lower, and are installed above the frame. The upper driving component and the lower driving component are each provided with an independent actuator, and the actuator is connected to the remote control system. The remote control system includes a drive system and a central processing unit, and the drive system is connected to the actuator.

[0043] See also Figure 2 , the tie rod assembly 1 includes a lower bearing seat 6, a threaded sleeve 7, a tie rod 8, a tie rod support 9, a spacer 10, a pressure ring 11, a ring 12, an upper tie rod threaded sleeve 13, a bearing 14, a locking nut 15, and an upper bearing seat 16; the two pairs of tie rod supports 9 are arranged symmetrically on the left and right, the upper bearing seat 16 and the lower bearing seat 6 are arranged up and down on the tie rod 8, the two pairs of tie rods 8 pass through the tie rod supports 9 and are supported by the tie rod supports 9, and the upper bearing seat 16 and the lower bearing seat 6 are fixed with threaded sleeves 7 by bolts; the upper roller system is rotatably mounted on the upper bearing seat 16, and the lower roller system is rotatably mounted on the lower bearing seat 6;

[0044] The upper pull rod threaded sleeve 13 is sleeved on the pull rod and rotates with the pull rod 8; the threaded sleeve 7 on the upper bearing seat 16 is sleeved on the upper pull rod threaded sleeve 13 and is connected to the upper pull rod threaded sleeve 13 through threads.

[0045] The middle part of the upper rod threaded sleeve 13 is a light hole 131, and the pull rod 8 is rotatably installed in the light hole 131, so that no torque is transmitted between the upper rod threaded sleeve 13 and the pull rod 8. The upper end of the upper rod threaded sleeve 13 is a spline 132, and is connected to the lower drive component through the spline 132. The lower end of the upper rod threaded sleeve 13 is a lifting thread 133, which cooperates with the threaded sleeve 7. When the upper rod threaded sleeve 13 rotates, the threaded sleeve 7 in the upper bearing seat 16 is fixed and does not rotate. The threaded sleeve 7 moves up and down on the upper rod threaded sleeve 13 under the action of the lifting thread 133, providing power for the upper bearing seat 16 to move up and down.

[0046] The upper end of the pull rod 8 is a spline 81, and is connected to the upper drive component through the spline 81. Below the spline 81 is a locking thread 82, on which a locking nut 15 is installed. Below the locking thread 82 is a concave bearing mounting position 83, which ensures that it can withstand greater axial force. The middle section of the pull rod 8 is an optical axis 84, on which the upper pull rod threaded sleeve 13 is rotatably installed. A ring 12 is installed between the lower end face of the upper pull rod threaded sleeve 13 and the end face of the pull rod 8, and a bearing 14 is provided on the upper end face of the upper pull rod threaded sleeve 13. Above the bearing 14 is a locking nut 15, which fixes the bearing 14, the upper pull rod threaded sleeve 13, and the ring 12 on the pull rod 8 from top to bottom in sequence through the locking nut 15; the role of the ring 12 and the bearing 14 is to reduce the friction of the upper pull rod threaded sleeve 13 rotating on the pull rod 8 to ensure free rotation.

[0047] The middle portion of the tie rod 8 is provided with a convex circle 85, and the tie rod support 9 is provided with a support hole 91 with a step provided in the support hole 91. The spacer 10, the convex circle 85 in the middle portion of the tie rod 8, and the pressure ring 11 are sequentially installed in the support hole 91. The step in the support hole 91 supports the spacer 10 and the tie rod 8. The pressure ring 11 presses the convex circle 85 in the middle portion of the tie rod 8 and is fixed to the tie rod support 9 by bolts, fixing the tie rod 8 to the tie rod support 9 so that the tie rod 8 can only rotate on the tie rod support 9 and cannot move axially.

[0048] The lower end of the tie rod 8 is provided with a lifting thread 86. The threaded sleeve on the lower bearing seat 6 is mounted on the lifting thread 86. The protective cover 19 is mounted on the lower bearing seat 6, covering the lifting thread 86 of the tie rod 8 to prevent impurities from entering the thread. The upper drive component drives the tie rod 8 to rotate, while the threaded sleeve 7 within the lower bearing seat 6 is fixed and does not rotate. The lower bearing seat 6 moves up and down along the tie rod 8 under the action of the lifting thread 86.

[0049] The bearing 14 is a split structure, directly mounted on the bearing mounting position 83 of the tie rod 8, ensuring that it can withstand greater axial forces and reducing the axial forces borne by the double nuts. The upper end surface of the bearing 14 has a raised step, and the lower end surface of the locking nut 15 has a recessed step, which directly engages the raised step on the upper end surface of the bearing 14. The locking nut 15 adopts a double-nut anti-loosening structure. The lower end surface of the bearing 14 has a raised step, and the upper end surface of the upper tie rod threaded sleeve 13 has a recessed step, which directly engages the raised step on the lower end surface of the bearing 14. The transparent cover 17 passes through the upper tie rod threaded sleeve 13 and is fixed to the upper bearing seat 16 by bolts. A dust ring and a sealing ring are provided between the transparent cover 17 and the upper tie rod threaded sleeve 13 to prevent impurities from entering the threads.

[0050] The tie rod support 9 is provided with a lifting lug 94 for hoisting the rolling mill core. Upper and lower guide mounting steps 96 and 95 are provided on the upper and lower sides of the tie rod support 9, respectively. Both upper and lower guide mounting steps 96 and 95 are provided with mounting holes. A U-shaped notch 97 is provided on the side of the tie rod support 9 opposite the support hole 91. This notch 97 serves as the mounting interface between the entire rolling mill core and the rolling mill. Vertical roll system mounting holes 98 are provided on the side of the U-shaped notch 97 for mounting the vertical roll system 5. Upper and lower grooves 92 and 93 are provided on the upper and lower sides of the support hole 91, respectively. These grooves 92 and 93 oppose the upper and lower bearing seats 16 and 6, respectively. Displacement sensor assemblies 18 are installed in both the upper and lower grooves 92 and 93.

[0051] The guide beam 3 is a rectangular frame structure made of two square steels and two steel pipes, with bilateral symmetry. A bayonet 31 is provided in the middle of the guide beam 3, into which the tie rod support 9 is mounted; a guide mounting hole 32 is provided below the bayonet 31. A block 21 is provided above the bayonet 31, and a through hole is provided in the block 21, which serves as the guide mounting lifting hole. Through holes are provided at the upper and lower ends of the guide beam 3, through which long studs 20 pass and connect to the mounting holes on the lower guide mounting step 96 and the upper guide mounting step 95 of the tie rod support 9, respectively, fixing the guide beam 3 and the tie rod support 9 together to form a rectangular frame structure.

[0052] The displacement sensor assembly 18 comprises a sensor body and a sensor movement detection terminal. The sensor body is fixedly mounted within the upper groove 92 and the lower groove 93, while the sensor movement detection terminal is fixedly mounted on the upper bearing seat 16 and the lower bearing seat 6. A sealed cavity is formed between the lower bearing seat 6 and the upper bearing seat 16 and the tie rod support 9. A protective cover is installed outside the sensor body to effectively prevent debris from entering the sensor, which could affect its service life, and to prevent signal interference.

[0053] In this embodiment, a contour sensor is also included. The contour sensor is installed on the exit side of the rolling mill and is used to detect the size of the rolled piece coming out of the rolling mill. The displacement sensor assembly 18, the contour sensor, and the drive system are all connected to the central processing unit. The central processing unit controls the dual-drive pressing device to adjust the roll gap based on the feedback information of the displacement sensor assembly 18 and the contour sensor.

[0054] A method for adjusting the roll gap of a short stress line rolling mill, wherein the rolling mill adopts the short stress line rolling mill core in this embodiment; according to the specification height of the rolled piece, the upper driving component of the dual-drive pressing device 2 is used to drive the pull rod 8 to rotate, and the pull rod 8 drives the threaded sleeve in the lower bearing seat 16 to move up and down along the pull rod 8, so that the lower bearing seat 16 and the lower rolling roller system move up and down together; the upper pull rod threaded sleeve 13 is driven to rotate by the lower driving component of the dual-drive pressing device 2, and the upper pull rod threaded sleeve 13 drives the threaded sleeve 7 in the upper bearing seat 6 to move up and down along the upper pull rod threaded sleeve 13, so that the upper bearing seat 6 and the upper rolling roller system move up and down together, thereby realizing the adjustment of the horizontal roller system rolling center line elevation.

[0055] Before rolling, the remote control system controls the dual-drive hold-down device to adjust the roll gap of the horizontal roll system based on the specifications of the rolled piece, the roll ring diameter of the horizontal roll system, and the position data of the upper and lower roll systems fed back by the displacement sensor assembly. During the rolling process, the profile sensor transmits the real-time data of the rolled piece to the central processing unit. After processing the data, the central processing unit controls the dual-drive hold-down device through the drive system to adjust and correct the roll gap of the horizontal roll system. The displacement sensor assembly detects the movement position information of the horizontal roll system in real time and transmits the position information to the central processing unit to realize automatic correction of the roll gap of the horizontal roll system.

[0056] During the elevation adjustment process of the rolling center line of the horizontal roller system, the position of the horizontal roller system is detected by multiple displacement sensor assemblies 18. Four displacement sensor assemblies are respectively installed on the upper roller system and the lower roller system of the horizontal roller system. When the horizontal roller system is raised and lowered, the data changes of the four displacement sensor assemblies of the upper roller system and the lower roller system are consistent. The data changes can be used to know whether the new short stress rolling mill core of the present invention has a fault and the approximate location of the fault.

[0057] Specifically, the displacement sensor assembly determines the position of the upper (lower) roll of the horizontal roll system by detecting the positional relationship between the upper (lower) bearing seat and the tie rod support. The displacement sensor assembly can independently measure the position elevation of the upper (lower) roll of the upper (lower) horizontal roll system and calculate the rolling centerline elevation of the upper and lower rolls of the horizontal roll system. The roll gap of the rolling mill is adjusted remotely online based on the roll diameter of the upper (lower) roll of the horizontal roll system, the size of the workpiece, and the position elevation of the upper (lower) roll of the horizontal roll system. The contour sensor detects the size of the workpiece and determines whether it is the required size through the remote control system. If it is not the required size, the drive system of the dual-drive hold-down device will operate to adjust the roll gap of the rolling mill. The displacement sensor assembly provides real-time feedback of the roll gap data. When the required roll gap value is reached, the dual-drive hold-down device stops working, completing the automatic roll gap adjustment.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions, which should all be included in the scope of the claims of the present invention.

Claims

1. A short stress line rolling mill core, comprising a frame and a horizontal roller system provided on the frame, wherein the horizontal roller system comprises an upper roller system and a lower roller system, and is characterized in that: The horizontal roll system further includes a tie rod assembly and a dual-drive press-down device; the dual-drive press-down device is fixed to the frame and connected to the tie rod assembly, and the upper roll system and the lower roll system are both mounted on the tie rod assembly; the dual-drive press-down device drives the upper roll system and the lower roll system to move up and down separately through the tie rod assembly to adjust the roll gap of the horizontal roll system of the rolling mill; The dual-drive pressing device includes an upper driving component and a lower driving component arranged in upper and lower layers; the pull rod assembly includes a pull rod, an upper pull rod threaded sleeve, an upper bearing seat, and a lower bearing seat; the upper bearing seat and the lower bearing seat are both fixed with threaded sleeves; the upper roller is arranged on the upper bearing seat, and the lower roller is arranged on the lower bearing seat; The upper pull rod threaded sleeve is sleeved on the pull rod and rotates with the pull rod; the threaded sleeve on the upper bearing seat is sleeved on the upper pull rod threaded sleeve and is connected to the upper pull rod threaded sleeve through a thread; the lower driving component is connected to one end of the upper pull rod threaded sleeve and drives the upper pull rod threaded sleeve to rotate, thereby driving the upper bearing seat to move up and down through the threaded sleeve; The threaded sleeve on the lower bearing seat is sleeved on the pull rod and is connected to the pull rod through a thread; the upper driving component is connected to one end of the pull rod and drives the pull rod to rotate, thereby driving the lower bearing seat to move up and down through the threaded sleeve; The frame includes a tie rod support and two guide beams; the guide beams are rectangular structures with left and right symmetry, and each guide beam is provided with a tie rod support on both sides, and the tie rod support is fixedly connected to the guide beam; The tie rod support is provided with a support hole, the tie rod is rotatably arranged in the support hole, and passes through the support hole to be connected with the lower bearing seat; the upper bearing seat and the lower bearing seat are respectively provided at both ends of the tie rod support, and are slidably matched with the tie rod support; A convex circle is provided in the middle of the pull rod, and a pressure ring is provided at one end of the support hole. The pressure ring is fixedly connected to the pull rod support and pressed against the end face of the convex circle to prevent the pull rod from axial movement; a bayonet is provided on the guide beam, and the pull rod support is clamped in the bayonet; two U-shaped notches for fixed connection are provided in the middle of the pull rod support, and the rolling mill core is fixedly installed on the rolling mill base through the U-shaped notches; a displacement sensor assembly is provided on the pull rod support, and the displacement sensor assembly includes a sensor body and a sensor movement detection end; grooves are provided at both ends of the pull rod support, and the two grooves are respectively opposite to the upper bearing seat and the lower bearing seat; the sensor assembly is provided in each of the grooves, the sensor body is fixed in the groove, and the sensor movement detection end is fixed on the upper bearing seat or the lower bearing seat.

2. The short stress line rolling mill core according to claim 1, characterized in that: It also includes a contour sensor and a remote control system. The contour sensor is arranged on the exit side of the rolling mill and is used to detect the size of the rolled piece coming out of the rolling mill. The displacement sensor assembly, contour sensor, and dual-drive pressing device are all connected to the remote control system. The remote control system controls the dual-drive pressing device to adjust the roll gap based on the feedback information of the displacement sensor assembly and contour sensor.

3. The short stress line rolling mill core according to claim 1, characterized in that: It also includes a vertical roller system arranged between the upper roller system and the lower roller system.

4. A method for adjusting the roll gap of a short stress line rolling mill, characterized in that: The rolling mill adopts the short stress line rolling mill core as described in any one of claims 1 to 3; according to different specifications of rolled products, the upper driving component of the dual-drive pressing device is used to drive the pull rod to rotate, and the pull rod drives the threaded sleeve in the lower bearing seat to move up and down along the pull rod, so that the lower bearing seat and the lower rolling roller system move up and down together; the lower driving component of the dual-drive pressing device is used to drive the upper pull rod threaded sleeve to rotate, and the upper pull rod threaded sleeve drives the threaded sleeve in the upper bearing seat to move up and down along the upper pull rod threaded sleeve, so that the upper bearing seat and the upper rolling roller system move up and down together, thereby realizing the roll gap adjustment of the horizontal roll system.

5. The method for adjusting the roll gap of a short stress line rolling mill according to claim 4, characterized in that: Before rolling, the remote control system first adjusts the roll gap of the horizontal roll system based on the specifications of the rolled product, the roll ring diameter of the horizontal roll system, and the position information of the upper and lower roll systems fed back by the displacement sensor components; during the rolling process, the remote control system controls the dual-drive pressing device to correct the roll gap of the horizontal roll system based on the rolled product profile information fed back by the profile sensor, thereby realizing online automatic correction of the rolling mill roll gap; during the roll gap adjustment process of the horizontal roll system, the horizontal roll system position and horizontal roll system levelness are detected through multiple displacement sensor components.

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