Automatic adjusting device for flat head sleeve of rolling mill

Abstract

The embodiment of the present application provides a rolling mill flat head sleeve automatic adjusting device, and the design relates to the field of rolling mill production, and the device comprises a bracket body, upper and lower flat head sleeves which are evenly arranged on the bracket body, an adjusting assembly, a driving assembly, a pressure detection assembly and a PLC control system, the adjusting assembly is arranged on the bracket body and is connected with the upper and lower flat head sleeves, and the adjusting assembly is used for adjusting the acting force between the upper and lower flat head sleeves; the driving assembly is connected with the adjusting assembly; the pressure detection assembly is arranged at the connecting position of the adjusting assembly and the lower flat head sleeve, and is used for detecting the acting force between the upper and lower flat head sleeves; and the PLC control system is arranged on the bracket body and is electrically connected with the pressure detection assembly and the driving assembly at the same time. The present application can eliminate the influence of the change of roll gap caused by excessive vibration due to operation imbalance on the stability of rolling.

Description

Technical Field

[0001] This invention relates to the field of rolling mill production, and more specifically, to an automatic adjustment device for the flat end sleeve of a rolling mill. Background Technology

[0002] A rolling mill is the main machine for directly rolling metals. It uses rotating rolls to press the billet, causing the metal to undergo plastic deformation according to specified requirements. In hot-rolled high-speed bar mills, the flat end sleeves of the roll heads of horizontal twin-roll mills are the main components connecting the mill rolls to achieve power transmission. The main mechanical drive system of a high-speed bar finishing mill is characterized by frequent and repeated starts, impacts, and frequent sudden loading (unloading) forces.

[0003] The inventors discovered that unstable operation during this transmission process significantly impacts the main drive system of the finishing mill, severely affecting its usability. Poor quality and precision of the flat head sleeve itself will drastically reduce its service life. The magnitude and duration of vibration in the flat head sleeve during rolling production cause wear on other mill components. When wear exceeds a certain range, it can lead to a series of equipment malfunctions, including mill misalignment, steel accumulation, universal joint breakage, and gearbox damage. Therefore, improving the operational stability of the mill's flat head sleeve is an ongoing technical challenge. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic adjustment device for the flat head sleeve of a rolling mill, which can quickly, effectively, and automatically adjust and eliminate the excessive vibration caused by the imbalance between the upper and lower flat head sleeves, thus preventing the change in roll gap from affecting the stability of rolling. At the same time, it avoids damage to the balance point of the flat head sleeve bearing or the roll bearing, and can also achieve the balance of the flat head sleeve operation in various unexpected situations.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, the present invention provides an automatic adjustment device for a rolling mill flat head sleeve, comprising a bracket body, an upper flat head sleeve and a lower flat head sleeve both disposed on the bracket body, and further comprising:

[0007] An adjustment component is disposed on the bracket body and connected to the upper flat head sleeve and the lower flat head sleeve. The adjustment component is used to adjust the force between the upper flat head sleeve and the lower flat head sleeve.

[0008] A drive component, which is connected to the adjustment component;

[0009] A pressure detection component is disposed at the connection between the adjustment component and the lower flat head sleeve, and the pressure detection component is used to detect the force between the upper flat head sleeve and the lower flat head sleeve;

[0010] The PLC control system is mounted on the bracket body and electrically connected to both the pressure detection component and the drive component. The PLC control system is used to receive signals from the pressure detection component and issue commands to the drive component.

[0011] In an optional embodiment, the adjusting assembly includes a chain, a sprocket, a bracket, and a sprocket seat. The chain is wound around the sprocket, and the two ends of the chain are respectively connected to the upper flat head sleeve and the lower flat head sleeve. A pin is inserted through the center hole of the sprocket. The pin is movably connected to the bracket and fixedly connected to the sprocket seat. The bracket is fixed to the bracket body, and the sprocket seat is movably sleeved on the outside of the bracket.

[0012] In an optional embodiment, the adjustment assembly includes two chains, two sprockets, a bracket, and two sprocket seats, with the two chains, two sprockets, and two sprocket seats symmetrically arranged on the left and right sides of the bracket.

[0013] In an optional embodiment, the front of the bracket is a concave structure and the side is an inverted U-shaped structure. The middle part of the bracket is fixed to the bracket body. Movable grooves are provided at the left and right ends of the front of the bracket, and the two pins are respectively disposed in the two movable grooves.

[0014] In an optional embodiment, the side of the sprocket seat is an inverted U-shaped structure, and the two sprocket seats are respectively movably sleeved on the left and right ends of the front of the bracket.

[0015] In an optional embodiment, the drive assembly includes a worm gear structure, a motor, and a control element. The motor and the control element are electrically connected. The motor is mounted on the sprocket seat, and the control element is mounted on the motor. The motor is connected to the worm gear structure, and the worm gear structure is drivingly connected to the bracket and the sprocket seat.

[0016] In an optional embodiment, two drive components are provided, and the two drive components are symmetrically arranged on the two sprocket seats respectively.

[0017] In an optional embodiment, the top surfaces of the left and right ends of the bracket are provided with first threaded holes, the tops of the two sprocket seats are provided with second threaded holes, and the worms in the two worm gear structures are respectively threaded to the first threaded holes and the second threaded holes on the same side.

[0018] In an optional embodiment, the pressure detection assembly includes a hollow tube, a pressure spring, and a pressure detection element. The hollow tube is movably disposed at the connection between the lower flat head sleeve and the chain. The chain passes through the hollow tube, and one end of the chain is fixed to the bottom of the hollow tube. The pressure spring is sleeved on the hollow tube, and both ends of the pressure spring are respectively connected to the lower flat head sleeve and the bottom of the hollow tube. The pressure detection element is disposed at the connection between the pressure spring and the lower flat head sleeve.

[0019] In an optional embodiment, two pressure detection components are provided, symmetrically arranged, with one component located at the connection point between one of the chains and the lower flat head sleeve, and the other component located at the connection point between the other chain and the lower flat head sleeve.

[0020] The beneficial effects of the embodiments of the present invention include, for example, the inclusion of an adjustment component connecting the upper and lower flat head sleeves, adjusting the force between them to achieve a balanced state, eliminating the impact of excessive vibration caused by imbalance between the upper and lower flat head sleeves on the rolling pitch stability, and preventing damage to the balance point of the flat head sleeve bearings or roll bearings. Furthermore, the present invention includes an automatic control system composed of a drive component, a pressure detection component, and a PLC control system, capable of sensing the force between the upper and lower flat head sleeves in real time and then automatically adjusting according to the magnitude of the force, achieving automated adjustment. Compared with the prior art, this further stabilizes the stability and safety of the upper and lower flat head sleeves, especially solving the problem of the inability to promptly address changes in the flat head sleeve roll pitch due to vibration during production, thus reducing instability factors that previously relied solely on manual assistance and could not be adjusted during production, leading to vibrations in the support frame and rolling mill that affected production. This minimizes manpower input and improves the conditions for intelligent production. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall first-view perspective provided for an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the adjustment component from a first perspective provided in an embodiment of the present invention;

[0024] Figure 3 This is a first-view schematic diagram of the pressure detection component provided in an embodiment of the present invention.

[0025] icon:

[0026] 100-Bracket body; 200-Upper flat head sleeve; 300-Lower flat head sleeve; 400-Adjusting component; 410-Chain; 420-Sprocket; 421-Pin; 430-Bracket; 431-Modible groove; 432-First threaded hole; 440-Sprocket seat; 441-Second threaded hole; 500-Drive component; 510-Worm gear structure; 520-Motor; 530-Control element; 600-Pressure detection component; 610-Hollow tube; 620-Pressure spring; 630-Pressure detection element; 700-PLC control system. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] The tension of the original chain 410 could only be adjusted by the bottom adjusting rod nut. After a period of use, the adjusting rod screw would corrode due to the large load, high temperature and moisture in the environment, and would also become stripped or damaged. When this happened, the tension of the chain 410 could no longer be adjusted and the only option was to repair and replace it.

[0034] In existing technology, the known technology is the balance connection mechanism of the finishing mill support. This mechanism uses two sets of chains 410 (left and right) to connect the upper and lower supports. The tension of these chains 410 can only be adjusted by the bottom adjusting rod nut. After a period of use, the adjusting rod screw corrodes due to heavy loads, high temperatures, and moisture, leading to stripping or damage. When this happens, the chain tension cannot be adjusted, and replacement is the only option. Furthermore, the poor quality and precision of the flat head sleeve significantly reduce its service life. During rolling production, the magnitude and duration of the flat head sleeve's vibration cause wear on other parts of the mill. When wear exceeds a certain range, it can cause a series of equipment failures, such as mill misalignment, steel accumulation, universal joint breakage, and gearbox damage. Excessive support vibration causes changes in the roll gap, affecting rolling stability and, in severe cases, even damaging the support or roll bearings, leading to production stoppage. This is a deficiency in existing technology. To address the aforementioned issues, this embodiment provides an automatic adjustment device for the flat end sleeve of a rolling mill.

[0035] Please refer to Figure 1The automatic adjustment device for the rolling mill flat sleeve provided in this embodiment includes a bracket body 100, an upper flat sleeve 200 and a lower flat sleeve 300 both mounted on the bracket body 100, and further includes an adjustment component 400, a drive component 500, a pressure detection component 600, and a PLC control system 700. The adjustment component 400 is mounted on the bracket body 100 and connected to the upper flat sleeve 200 and the lower flat sleeve 300. The adjustment component 400 is used to adjust the force between the upper flat sleeve 200 and the lower flat sleeve 300. The drive assembly 500 is connected to the adjustment assembly 400; the pressure detection assembly 600 is located at the connection between the adjustment assembly 400 and the lower flat head sleeve 300, and the pressure detection assembly 600 is used to detect the force between the upper flat head sleeve 200 and the lower flat head sleeve 300; the PLC control system 700 is located on the bracket body 100 and is electrically connected to both the pressure detection assembly 600 and the drive assembly 500, and the PLC control system 700 is used to receive the signal from the pressure detection assembly 600 and issue instructions to the drive assembly 500.

[0036] It is understood that the adjustment component 400 in this embodiment connects the upper flat head sleeve 200 and the lower flat head sleeve 300, adjusting the force between them to achieve a balanced state. This eliminates the excessive vibration caused by the imbalance between the upper and lower flat head sleeves 200 and the lower flat head sleeve, which affects the rolling stability due to changes in the roll gap. It also avoids damage to the balance point of the flat head sleeve bearing or the roll bearing. In addition, this embodiment also includes a self-adjusting system composed of a drive component 500, a pressure detection component 600, and a PLC control system 700. The pressure detection component 600 can detect the force between the upper and lower flat head sleeves 200 and the lower flat head sleeve 300, and then send a signal to the PLC control system 700. The PLC control system 700 then sends an adjustment signal to the drive component 500. Finally, the drive component 500 drives the adjustment component 400 to make adjustments, further stabilizing the stability and safety of the operation of the upper and lower flat head sleeves 200 and 300.

[0037] Specifically, such as Figure 2 As shown, the adjusting assembly 400 includes a chain 410, a sprocket 420, a bracket 430, and a sprocket seat 440. The chain 410 is wound around the sprocket 420, and the two ends of the chain 410 are respectively connected to an upper flat head sleeve 200 and a lower flat head sleeve 300. Therefore, the balance between the upper flat head sleeve 200 and the lower flat head sleeve 300 can be maintained by adjusting the chain 410. Furthermore, a pin 421 is inserted through the center hole of the sprocket 420. The pin 421 is movably connected to the bracket 430 and fixedly connected to the sprocket seat 440. Therefore, when the pin 421 moves on the bracket 430, the sprocket seat 440 moves with the pin 421. Furthermore, the bracket 430 is fixed on the bracket body 100, and the sprocket seat 440 is movably sleeved on the outside of the bracket 430.

[0038] Furthermore, the adjustment structure is a symmetrical structure, including two chains 410, two sprockets 420, a bracket 430 and two sprocket seats 440, with the two chains 410, two sprockets 420 and two sprocket seats 440 symmetrically arranged on the left and right sides of the bracket 430.

[0039] It is understandable that, since the speed of the rolling mill used in this embodiment is around 1200 revolutions, the force between the upper flat head sleeve 200 and the lower flat head sleeve 300 is very strong when subjected to vibration. In order to make the adjustment structure more effective, the adjustment structure is designed as a symmetrical structure.

[0040] Optionally, from the overall structure of the bracket 430, the front of the bracket 430 is a concave structure and the side is an inverted U-shaped structure. The middle part of the bracket 430 is fixed on the bracket body 100. The left and right ends of the front of the bracket 430 are provided with movable grooves 431. Two pins 421 are respectively set in the two movable grooves 431. It is easy to imagine that the movable grooves 431 are set vertically, so the pins 421 can move up and down in the movable grooves 431.

[0041] Furthermore, in order to match the shape of the side of the bracket 430 mentioned above, the side of the sprocket seat 440 is also an inverted U-shaped structure, and the two sprocket seats 440 are respectively movably fitted onto the left and right ends of the front of the bracket 430.

[0042] Specifically, such as Figure 1 As shown, the drive assembly 500 includes a worm gear structure 510, a motor 520, and a control element 530. The motor 520 and the control element 530 are electrically connected. The motor 520 is mounted on the sprocket seat 440, and the control element 530 is mounted on the motor 520. The motor 520 is connected to the worm gear structure 510, and the worm gear structure 510 drives the support 430 and the sprocket seat 440. It is understood that the worm gear structure 510 is common existing technology, so it will not be described in detail here. The control unit receives signals from the PLC control system 700. When the control unit receives a signal, the output of the motor 520 provides power to the worm gear structure 510, thereby adjusting the support 430 and the sprocket seat 440 through the worm gear structure 510.

[0043] Furthermore, two drive assemblies 500 are provided, symmetrically arranged on the two sprocket seats 440. It can be understood that the purpose of providing two drive assemblies 500 is the same as the purpose of providing two adjustment assemblies 400: to improve the adjustment effect and extend the service life of the device.

[0044] Furthermore, such as Figure 2 As shown, the top surfaces of the left and right ends of the bracket 430 are provided with first threaded holes 432, and the tops of the two sprocket seats 440 are provided with second threaded holes 441. The worms in the two worm gear structures 510 are respectively threaded to the first threaded holes 432 and the second threaded holes 441 on the same side.

[0045] Understandably, when the worm gear structure 510 is driven by the motor 520, the worm in the worm gear structure 510 rotates. Since the worm is connected to the first threaded hole on the bracket 430 and the second threaded hole 441 on the sprocket seat 440, and the bracket 430 is fixed on the bracket body 100, while the sprocket seat 440 is movably sleeved on the bracket 430, during the rotation of the worm, the bracket 430 remains stationary, and the sprocket seat 440 slowly moves away from or towards the bracket 430. This, combined with the aforementioned movable connection between the pin 421 on the sprocket 420 and the bracket 430, and the sprocket seat 440... With seat 440 fixed, sprocket 420 also moves on bracket 430, moving up and down. Since chain 410 is wound around sprocket 420 and both ends of chain 410 are connected to upper flat head sleeve 200 and lower flat head sleeve 300 respectively, during the up and down movement of chain 410, chain 410 strengthens or releases the force between upper flat head sleeve 200 and lower flat head sleeve 300, thereby achieving balance between upper flat head sleeve 200 and lower flat head sleeve, reducing their vibration, and ultimately effectively improving the stability of upper flat head sleeve 200 and lower flat head sleeve 300 in production operation.

[0046] Specifically, such as Figure 3 As shown, the pressure detection assembly 600 includes a hollow tube 610, a pressure spring 620, and a pressure detection element 630. The hollow tube 610 is movably disposed at the connection between the lower flat head sleeve 300 and the chain 410. The chain 410 passes through the hollow tube 610, and one end of the chain 410 is fixed to the bottom of the hollow tube 610. The pressure spring 620 is sleeved on the hollow tube 610, and both ends of the pressure spring 620 are respectively connected to the bottom of the flat head sleeve and the bottom of the hollow tube 610. The pressure detection element 630 is disposed at the connection between the pressure spring 620 and the lower flat head sleeve 300. It is easy to know that the purpose of setting up the pressure detection component 600 is to detect the force between the upper flat head sleeve 200 and the lower flat head sleeve 300 (when the rolling mill is frequently started and repeatedly impacted and often subjected to sudden loading (unloading), vibration will occur between the upper flat head sleeve 200 and the lower flat head, and the force between the two will become stronger). If the detection result of the detection element is not within a reasonable range, the detection element will also send a signal to the PLC control system 700. Finally, the PLC control system 700 sends an adjustment signal to the adjustment component 400.

[0047] Furthermore, there are two pressure detection components 600, which are symmetrically arranged, with one component located at the connection between one chain 410 and the lower flat head sleeve 300, and the other component located at the connection between the other chain 410 and the lower flat head sleeve 300.

[0048] The working principle of the automatic adjustment device for the flat end sleeve of a rolling mill according to this embodiment is as follows: When the rolling mill starts, experiences repeated impacts, or receives sudden loading (unloading), the vibration of the upper flat end sleeve 200 and the lower flat end sleeve 300 intensifies. At this time, the detection element detects that the force between the upper flat end sleeve 200 and the lower flat end sleeve 300 exceeds the specified range. The detection element sends a signal to the PLC control system 700. After receiving the signal and processing it, the PLC control system 700 sends an adjustment signal to the drive assembly 500. At this time, the motor 520 performs work (forward rotation or reverse rotation), and then the motor 520 drives the worm gear structure 510 to run. Then the worm gear... The worm gear in the rod structure 510 rises or falls, thereby driving the sprocket seat 440 to move relative to the bracket 430 (rise or fall). The sprocket 420, which is fixed to the sprocket seat 440, also moves (rises or falls). Finally, the chain 410, which is wound around the sprocket 420 and connected to the upper flat head sleeve 200 and the lower flat head sleeve 300 at both ends, is adjusted. The chain 410 strengthens or releases the force between the upper flat head sleeve 200 and the lower flat head sleeve 300, thereby achieving a balance between the upper flat head sleeve 200 and the lower flat head sleeve, reducing their vibration, and ultimately effectively improving the stability of the upper flat head sleeve 200 and the lower flat head sleeve 300 in production operation.

[0049] The automatic adjustment device for the flat end sleeve of a rolling mill provided in this embodiment has at least the following advantages: In the context of widespread intelligent production environments, the automatic detection and adjustment functions of the upper flat end sleeve 200 and the lower flat end sleeve 300 enable intelligent control. This reduces the instability factors that previously relied solely on manual assistance and could not be adjusted during production, leading to vibrations in the support frame and rolling mill that affected production. It minimizes manpower input and improves the conditions for intelligent production. Furthermore, it maximizes the safety of operators. The automatic detection and adjustment function of the flat end sleeve adjustment device further stabilizes the stability and safety of its operation, particularly addressing the issue of the inability to promptly detect changes in the flat end sleeve roll gap due to vibration during production, thus preventing production disruptions.

[0050] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A device for automatically adjusting a flat head sleeve of a rolling mill, comprising an upper flat head sleeve and a lower flat head sleeve, each disposed on a carrier body, characterized in that, Also include: The adjusting assembly is arranged on the bracket body and is connected with the upper flat head sleeve and the lower flat head sleeve, and is used for adjusting the acting force between the upper flat head sleeve and the lower flat head sleeve, and the adjusting assembly comprises a chain, a sprocket, a support and a sprocket seat, the chain is wound on the sprocket, and the two ends of the chain are respectively connected with the upper flat head sleeve and the lower flat head sleeve, a bolt is arranged at the center hole of the sprocket, the bolt is movably connected with the support and fixedly connected with the sprocket seat, the support is fixed on the bracket body, and the sprocket seat is movably sleeved on the outside of the support; wherein the front surface of the support is of a concave structure, the side surface is of an inverted U-shaped structure, the middle part of the support is fixed on the bracket body, the left end and the right end of the front surface of the support are provided with movable grooves, and the bolt is arranged in the movable grooves; The driving assembly is connected with the adjusting assembly; The pressure detection assembly is arranged at the connection between the adjusting assembly and the lower flat head sleeve, and is used for detecting the acting force between the upper flat head sleeve and the lower flat head sleeve; The PLC control system is arranged on the bracket body and is electrically connected with the pressure detection assembly and the driving assembly at the same time, and is used for receiving the signal of the pressure detection assembly and issuing instructions to the driving assembly.

2. A device for automatic adjustment of a flat head sleeve of a rolling mill according to claim 1, characterized in that, The adjusting assembly comprises two chains, two sprockets, a support and two sprocket seats, and the two chains, the two sprockets and the two sprocket seats are symmetrically arranged on the left side and the right side of the support.

3. A device for automatic adjustment of a flat head sleeve of a rolling mill according to claim 1, characterized in that, The side surface of the sprocket seat is of an inverted U-shaped structure, and the two sprocket seats are movably sleeved on the left end and the right end of the front surface of the support.

4. A device for automatic adjustment of a flat head sleeve of a rolling mill according to claim 2, characterized in that, The driving assembly comprises a worm and gear structure, a motor and a control element, the motor and the control element are electrically connected, the motor is arranged on the sprocket seat, the control element is arranged on the motor, the motor is connected with the worm and gear structure, and the worm and gear structure is drivingly connected with the support and the sprocket seat.

5. A device for automatic adjustment of a flat head sleeve of a rolling mill according to claim 4, characterized in that, The driving assembly is provided with two, and the two driving assemblies are symmetrically arranged on the two sprocket seats.

6. A device for automatic adjustment of a flat head sleeve of a rolling mill according to claim 4, characterized in that, The top surface of the left end and the right end of the support is provided with a first threaded hole, the top of the two sprocket seats is provided with a second threaded hole, and the worms in the two worm and gear structures are respectively threadedly connected with the first threaded hole and the second threaded hole on the same side.

7. A device for automatic adjustment of a flat head sleeve of a rolling mill according to claim 2, characterized in that, The pressure detection assembly comprises a hollow tube, a pressure spring and a pressure detection element, the hollow tube is movably arranged at the connection between the lower flat head sleeve and the chain, the chain penetrates through the hollow tube, one end of the chain and the bottom of the hollow tube are fixed, the pressure spring is sleeved on the hollow tube, and the two ends of the pressure spring are respectively connected with the lower flat head sleeve and the bottom of the hollow tube, and the pressure detection element is arranged at the connection between the pressure spring and the lower flat head sleeve.

8. A device for automatic adjustment of a flat head sleeve of a rolling mill according to claim 2, characterized in that, The pressure detection assembly is provided with two, two said pressure detection assemblies are symmetrically arranged and one is arranged at the connection between one of said chains and the lower flat head sleeve, and the other is arranged at the connection between the other chain and the lower flat head sleeve.

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