A twenty roll mill housing quill grinding device

Abstract

This invention relates to the field of grinding equipment technology, and discloses a grinding device for the plum blossom hole of a 20-roll mill stand. The device includes a hydraulic motor, a motor support on one side of the output end of the hydraulic motor, a coupling component connected to the output end of the hydraulic motor, a splined shaft component sleeved on the output end of the coupling component, a bracket component rotatably sleeved on the outer wall of the splined shaft component, and a grinding component fixedly assembled at the end of the splined shaft component away from the coupling component. By achieving automation, efficiency and safety are significantly improved. Using a hydraulic motor as the core drive source, power is transmitted through the coupling component and the splined shaft component, completely replacing the heavy manual pushing and pulling, increasing the efficiency of the grinding operation several times, significantly shortening the production cycle, and fundamentally eliminating the safety hazards of manual operation.

Description

Technical Field

[0001] This invention relates to the field of grinding equipment technology, specifically to a grinding device for the plum blossom hole of a 20-roll mill stand. Background Technology

[0002] The 20-roll mill is a core piece of equipment in the production of precision strip steel, and the machining accuracy of the perforated holes on its mill stands plays a decisive role in the quality of the final product. In existing technology, after machining, the perforated holes are usually finished by manual grinding to achieve the required surface roughness.

[0003] Existing manual grinding methods have the following significant drawbacks:

[0004] Manual grinding usually requires two people to work together, pushing and pulling heavy grinding rollers back and forth by hand. The work is arduous and inefficient. It often takes several days to complete the grinding of all the pebbles on a single frame, which directly leads to long production cycles and high labor costs.

[0005] For large-scale rolling mill stands, the grinding rolls are extremely heavy, exceeding the range that can be driven by human power, making manual grinding methods no longer applicable and severely limiting the processing and maintenance of large equipment.

[0006] Manual operation makes it difficult to ensure the uniformity of pushing and pulling force and speed. Furthermore, the weight of the grinding roller itself will cause excessive contact pressure between it and the lower part of the plum blossom hole, while the contact pressure on the upper part and the sides will be insufficient, ultimately resulting in problems such as uneven grinding of the hole wall and reduced shape accuracy.

[0007] Operating heavy and moving grinding rollers poses a potential risk of physical injury to operators, resulting in poor overall safety.

[0008] Therefore, the market needs an automated solution that is efficient, stable, safe, and can guarantee high-quality grinding to replace outdated manual grinding processes. Summary of the Invention

[0009] This invention provides a grinding device for the plum blossom hole of a 20-roll mill stand, which solves the problems mentioned in the background art.

[0010] The present invention provides the following technical solution: a grinding device for the plum blossom hole of a 20-roll mill stand, comprising a hydraulic motor, a motor support provided on one side of the output end of the hydraulic motor, a coupling component connected to the output end of the hydraulic motor, a spline shaft component sleeved on the output end of the coupling component, a bracket component sleeved on the outer wall of the spline shaft component, and a grinding component fixedly assembled on the end of the spline shaft component away from the coupling component.

[0011] As a preferred technical solution of the present invention: both ends of the grinding component are fixedly equipped with spline shaft components, and the outer walls of both sets of spline shaft components are provided with bracket components for support.

[0012] As a preferred embodiment of the present invention: the coupling component includes an input half-coupling, a connecting slider is rotatably connected to the end of the input half-coupling, an intermediate coupling is rotatably connected to the end of the connecting slider, a connecting bushing is fixedly fitted to the end of the intermediate coupling, an output half-coupling is fixedly fitted to the end of the connecting bushing, and a spline bushing is fixedly fitted to the end of the output half-coupling via another set of connecting sliders, with an internal spline hole opened at the end of the spline bushing away from the input half-coupling.

[0013] As a preferred technical solution of the present invention: the spline shaft component includes a spline shaft body, a rolling bearing is fixedly assembled on the outer wall of the spline shaft body, a bearing seat is fixedly assembled on the outer wall of the rolling bearing, a bearing end cap is fixedly assembled on one side of the outer wall of the bearing seat, a support ring plate is fixedly assembled on the outer wall of the bearing seat, and a shaft end fixing plate is fixedly assembled on the end of the spline shaft body away from the bearing seat.

[0014] The main body of the spline shaft slides on the inner wall of the inner spline hole and cannot rotate relative to each other.

[0015] As a preferred technical solution of the present invention: the bracket component includes a fixed base, a guide rail frame is fixedly mounted on the top of the fixed base, a guide groove is provided on the inner wall of the guide rail frame, one end of the bracket pressing frame and the movable bracket is provided on the inner wall of the guide groove, and guide rollers are rotatably connected to the one end of the bracket pressing frame and the movable bracket located on the inner wall of the guide groove. Roller baffles are fixedly mounted on the ends of the bracket pressing frame and the movable bracket located on both sides of the guide rail frame.

[0016] The bracket pressure frame and the movable bracket are connected to each other at the ends away from the guide rail frame.

[0017] As a preferred technical solution of the present invention: the grinding component is a basic grinding component, the basic grinding component includes a basic roller body, the outer wall of the basic roller body is respectively provided with a main spiral groove and a secondary spiral groove that intersect each other, and the outer walls at both ends of the basic roller body are provided with end connecting grooves that connect with the main spiral groove and the secondary spiral groove.

[0018] As a preferred embodiment of the present invention: the grinding component is an intelligent grinding component, which includes an intelligent roller body. The outer wall of the intelligent roller body is provided with two intersecting main spiral grooves and two secondary spiral grooves. A telescopic mechanism mounting seat is provided on the outer wall of the intelligent roller body. An active compensation mechanism is fixedly mounted on the inner wall of the telescopic mechanism mounting seat. A debris collection cavity is provided on the inner wall of the intelligent roller body. A central limiting ring is rotatably connected to the inner wall of the debris collection cavity. A debris suction port is provided on the inner wall of the debris collection cavity. The debris suction port is connected to the main spiral grooves... The two and the two auxiliary spiral grooves intersect at their respective points. A support end connecting plate is fixedly mounted on one side of the intelligent roller body, and a drive end connecting plate is fixedly mounted on the other side of the intelligent roller body. A liquid supply port is opened in the inner cavity of the drive end connecting plate. A rotary liquid supply connector is rotatably sleeved on the outer wall of the drive end connecting plate. A static circulation pump core is rotatably connected to the inner wall of the support end connecting plate. A venturi tube is fixedly mounted in the inner cavity of the static circulation pump core. A negative pressure chip suction tube is fixedly connected to the inner cavity of the venturi tube. A Pitot tube pump pickup tube is fixedly connected to the inner cavity of the static circulation pump core.

[0019] The space between the negative pressure suction pipe, the central limiting ring, and the debris collection chamber is connected. The outer wall of the end of the Pitot tube pump pickup pipe away from the static circulation pump core is attached to the inner wall of the intelligent roller. The outer wall of the static circulation pump core near the rotary liquid supply connector has several slots.

[0020] As a preferred embodiment of the present invention: the active compensation mechanism includes a telescopic actuator, a compensation grinding head is fixedly mounted on the top telescopic end of the telescopic actuator, an integrated pressure sensor is fixedly mounted on the outer wall of the compensation grinding head, a telescopic displacement sensor is fixedly mounted on the inner cavity of the integrated pressure sensor, and the top measuring end of the telescopic displacement sensor retractably protrudes from the outer wall of the integrated pressure sensor.

[0021] The present invention has the following beneficial effects:

[0022] 1. This 20-roll mill stand plum blossom hole grinding device significantly improves efficiency and safety through automation. Utilizing a hydraulic motor as the core drive source, it transmits power through coupling and spline shaft components, completely replacing the heavy manual pushing and pulling, increasing grinding efficiency several times over and significantly shortening the production cycle. Simultaneously, mechanized operation fundamentally eliminates the safety hazards of manual operation. By setting spline shaft components and bracket components on both sides of the grinding component, a double support structure is formed. This structure effectively prevents the long grinding component from tipping over and vibrating due to single-end cantilever stress, ensuring that it remains precisely parallel to the plum blossom hole axis throughout the grinding process, providing a fundamental guarantee for achieving uniform grinding.

[0023] 2. The 20-roll mill stand plum blossom hole grinding device of this invention is equipped with a core active compensation mechanism through the intelligent grinding component of this invention. This mechanism can drive the compensation grinding head through the telescopic driver to actively and quantify the pressure compensation on the upper part and both sides of the hole wall where the grinding pressure is insufficient due to gravity. With the real-time feedback of the integrated pressure sensor and telescopic displacement sensor, it realizes 360° closed-loop force control of the entire hole wall, fundamentally solving the quality problem of "heavy at the bottom and light at the top" in traditional grinding, and ensuring the final shape accuracy and surface consistency.

[0024] 3. The 20-roll mill stand plum blossom hole grinding device integrates a self-driven liquid circulation system within the intelligent grinding components. Utilizing the energy of the grinding roller's own rotation, the liquid is pressurized through a Pitot tube pump pickup pipe, and then negative pressure is generated using a Venturi tube to forcefully suck up the grinding debris collected by the main spiral groove. This system combines cooling and cleaning functions into one, eliminating the need for an external pump station. It has a compact structure and can continuously keep the processing area clean, preventing secondary scratches on the processed surface by debris, thus further improving the grinding quality.

[0025] 4. The 20-roll mill stand plum blossom hole grinding device, through the coupling component having a universal joint-like structure, allows for a certain angular and positional deviation between the hydraulic motor and the axis of the grinding component, which greatly reduces the difficulty of on-site installation alignment and improves the applicability and flexibility of the device. At the same time, the extension and retraction capability of the active compensation mechanism also allows it to easily adapt to different specifications of plum blossom hole diameters, realizing "one machine for multiple uses". Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the basic grinding component structure of the present invention;

[0027] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 3 This is a schematic diagram of the structure in use of the present invention;

[0029] Figure 4 This is a schematic diagram of the bracket component structure of the present invention;

[0030] Figure 5 This is a schematic diagram of the coupling component structure of the present invention;

[0031] Figure 6 This is a schematic diagram of the spline shaft component structure of the present invention;

[0032] Figure 7 This is a schematic diagram of the intelligent grinding component structure of the present invention;

[0033] Figure 8 This is an exploded structural diagram of the intelligent grinding component of the present invention;

[0034] Figure 9 This is a schematic diagram of the intelligent grinding component structure of the present invention;

[0035] Figure 10 This is a schematic diagram of the debris collection chamber structure of the present invention;

[0036] Figure 11 This is a schematic diagram of the pickup tube structure of the Pitot tube pump of the present invention.

[0037] In the diagram: 1. Hydraulic motor; 2. Motor support; 3. Coupling assembly; 4. Splined shaft assembly; 5. Bracket assembly; 6. Basic grinding assembly; 7. Intelligent grinding assembly; 8. Rolling mill stand;

[0038] 301. Input half-coupling; 302. Connecting slider; 303. Intermediate coupling; 304. Connecting bushing; 305. Output half-coupling; 306. Spline bushing; 307. Internal spline hole;

[0039] 401. Splined shaft body; 402. Bearing housing; 403. Rolling bearing; 404. Bearing end cover; 405. Support ring plate; 406. Shaft end fixing plate;

[0040] 501. Movable bracket; 502. Bracket clamp; 503. Guide rail; 504. Fixed base; 505. Guide roller; 506. Roller baffle; 507. Guide groove;

[0041] 601. Base roller body; 602. Main spiral groove one; 603. Secondary spiral groove one; 604. End connecting groove;

[0042] 701. Intelligent roller body; 702. Main spiral groove II; 703. Secondary spiral groove II; 704. Telescopic mechanism mounting base; 705. Debris collection chamber; 706. Debris suction inlet; 707. Central limit ring; 708. Active compensation mechanism; 709. Support end connecting plate; 710. Drive end connecting plate; 711. Liquid supply port; 712. Rotary liquid supply connector; 713. Venturi tube; 714. Negative pressure chip suction pipe; 715. Pitot tube pump pickup pipe; 716. Static circulation pump core;

[0043] 7081, Telescopic actuator; 7082, Compensating grinding head; 7083, Integrated pressure sensor; 7084, Telescopic displacement sensor. Detailed Implementation

[0044] 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.

[0045] Please see Figure 1 - Figure 11 A grinding device for the plum blossom hole of a 20-roll mill stand includes a hydraulic motor 1, a motor support 2 is provided on one side of the output end of the hydraulic motor 1, a coupling component 3 is connected to the output end of the hydraulic motor 1, a spline shaft component 4 is sleeved on the output end of the coupling component 3, a bracket component 5 is sleeved on the outer wall of the spline shaft component 4, and a grinding component is fixedly assembled on the end of the spline shaft component 4 away from the coupling component 3.

[0046] In a preferred embodiment: both ends of the grinding component are fixedly equipped with spline shaft components 4, and the outer walls of both sets of spline shaft components 4 are provided with bracket components 5 for support.

[0047] In the above structure, the grinding component is connected by two sets of spline shaft components 4, and the spline shaft components 4 are supported by two sets of bracket components 5, so that both ends of the grinding component can bear force, thus avoiding the problem that one end of the grinding component will tilt and cause the grinding component to be not in a horizontal state. On the other hand, the two sets of bracket components 5 are used to move the spline shaft components 4, so that the grinding component can move laterally along the bracket components 5 with the support of the two sets of spline shaft components 4, so as to meet the requirement that the grinding component is located in the plum blossom hole inside the rolling mill stand 8 for grinding.

[0048] In a preferred embodiment: the coupling component 3 includes an input half coupling 301, a connecting slider 302 rotatably connected to the end of the input half coupling 301, an intermediate coupling 303 rotatably connected to the end of the connecting slider 302, a connecting bushing 304 fixedly mounted to the end of the intermediate coupling 303, an output half coupling 305 fixedly mounted to the end of the connecting bushing 304, and a spline bushing 306 fixedly mounted to the end of the output half coupling 305 via another set of connecting sliders 302. The spline bushing 306 has an internal spline hole 307 at the end away from the input half coupling 301.

[0049] In the above structure, the input half-coupling 301, intermediate coupling 303, connecting bushing 304, output half-coupling 305, and spline bushing 306 are rotatably connected by two sets of connecting sliders 302, so that the coupling component 3 achieves a function similar to universal joint transmission. In this way, the power output by the hydraulic motor 1 can drive the spline shaft component 4 to rotate through the coupling component 3, and the hydraulic motor 1 and the spline shaft component 4 can achieve power output even if they are not located on the same axis.

[0050] In a preferred embodiment: the spline shaft component 4 includes a spline shaft body 401, a rolling bearing 403 is fixedly mounted on the outer wall of the spline shaft body 401, a bearing seat 402 is fixedly mounted on the outer wall of the rolling bearing 403, a bearing end cap 404 is fixedly mounted on one side of the outer wall of the bearing seat 402, a support ring plate 405 is fixedly mounted on the outer wall of the bearing seat 402, and a shaft end fixing plate 406 is fixedly mounted on the end of the spline shaft body 401 away from the bearing seat 402.

[0051] The spline shaft body 401 slides on the inner wall of the inner spline hole 307 and cannot rotate relative to it.

[0052] In the above structure, the spline shaft body 401 is limited and slidably connected to the inner spline hole 307, and the support ring plate 405 and the bracket component 5 are fixedly supported, so that the spline shaft component 4 can slide along the bracket component 5 while maintaining the driving connection with the coupling component 3.

[0053] Specifically, a rolling bearing 403 is used to achieve a rotatable connection between the spline shaft body 401 and the bearing housing 402, so that the support ring plate 405 on the outer wall of the bearing housing 402 can be directly fixedly assembled with the bracket component 5, thereby ensuring the normal rotation of the spline shaft body 401.

[0054] In a preferred embodiment: the bracket component 5 includes a fixed base 504, a guide rail 503 is fixedly mounted on the top of the fixed base 504, a guide groove 507 is provided on the inner wall of the guide rail 503, one end of the bracket pressing frame 502 and the movable bracket 501 is provided on the inner wall of the guide groove 507, and guide rollers 505 are rotatably connected to the one end of the bracket pressing frame 502 and the movable bracket 501 located on the inner wall of the guide groove 507, and roller baffles 506 are fixedly mounted on the ends of the bracket pressing frame 502 and the movable bracket 501 located on both sides of the guide rail 503;

[0055] The ends of the bracket pressure frame 502 and the movable bracket 501 that are away from the guide rail frame 503 are connected to each other.

[0056] In the above structure, the bracket pressure frame 502 and the movable bracket 501 are connected to each other, and the ends of the bracket pressure frame 502 and the movable bracket 501 are fixed by the roller baffle 506, so that the roller baffle 506, the bracket pressure frame 502 and the movable bracket 501 form a stable state. The guide roller 505 is rotatably connected to the inner wall of the guide groove 507, so that the movable bracket 501 and the bracket pressure frame 502 can move along the guide groove 507 by relying on the guide roller 505.

[0057] In a preferred embodiment: the grinding component is a base grinding component 6, which includes a base roller 601. The outer wall of the base roller 601 is provided with a main spiral groove 602 and a secondary spiral groove 603 that intersect each other. The outer walls at both ends of the base roller 601 are provided with end connecting grooves 604 that connect with the main spiral groove 602 and the secondary spiral groove 603.

[0058] In the above structure, by opening the main spiral groove 602, the secondary spiral groove 603, and the end connecting groove 604, when the basic grinding component 6 moves to grind the plum blossom hole inside the rolling mill stand 8, it can perform a certain amount of scraping work on the plum blossom hole through the outer edges of the main spiral groove 602, the secondary spiral groove 603, and the end connecting groove 604. On the other hand, when the basic grinding component 6 is rotating, it can use the spirally arranged main spiral groove 602 and secondary spiral groove 603 to guide the grinding dust generated during the grinding between the basic grinding component 6 and the plum blossom hole, so that the grinding dust is discharged between the basic grinding component 6 and the plum blossom hole along the main spiral groove 602 and the secondary spiral groove 603.

[0059] In a preferred embodiment: the grinding component is an intelligent grinding component 7, which includes an intelligent roller body 701. The outer wall of the intelligent roller body 701 is respectively provided with intersecting main spiral grooves 702 and secondary spiral grooves 703. A telescopic mechanism mounting seat 704 is provided on the outer wall of the intelligent roller body 701. An active compensation mechanism 708 is fixedly mounted on the inner wall of the telescopic mechanism mounting seat 704. A debris collection cavity 705 is provided on the inner wall of the intelligent roller body 701. A central limiting ring 707 is rotatably connected to the inner wall of the debris collection cavity 705. A debris suction port 706 is provided on the inner wall of the debris collection cavity 705. The debris suction port 706 is connected to the main spiral grooves 702 and secondary spiral grooves 703. The spiral grooves 703 intersect at corresponding points. A support end connecting plate 709 is fixedly mounted on one side of the intelligent roller body 701, and a drive end connecting plate 710 is fixedly mounted on the other side of the intelligent roller body 701. A liquid supply port 711 is opened in the inner cavity of the drive end connecting plate 710. A rotary liquid supply connector 712 is rotatably sleeved on the outer wall of the drive end connecting plate 710. A static circulation pump core 716 is rotatably connected to the inner wall of the support end connecting plate 709. A venturi tube 713 is fixedly mounted in the inner cavity of the static circulation pump core 716. A negative pressure chip suction tube 714 is fixedly connected to the inner cavity of the venturi tube 713. A Pitot tube pump pickup tube 715 is fixedly connected to the inner cavity of the static circulation pump core 716.

[0060] The space between the negative pressure suction pipe 714, the central limiting ring 707, and the debris collection chamber 705 is connected. The outer wall of the end of the pitot tube pump pickup pipe 715 away from the static circulation pump core 716 is attached to the inner wall of the intelligent roller body 701. Several slots are opened on the outer wall of the static circulation pump core 716 near the rotary liquid supply connector 712.

[0061] In the above structure, by opening the main spiral groove 702 and the secondary spiral groove 703, when the intelligent grinding component 7 moves to grind the plum blossom hole inside the rolling mill stand 8, it can perform a certain amount of scraping work on the plum blossom hole through the outer edge of the main spiral groove 702 and the secondary spiral groove 703. On the other hand, when the intelligent grinding component 7 is rotating, it can use the spirally arranged main spiral groove 702 and secondary spiral groove 703 to guide the grinding dust generated between the intelligent grinding component 7 and the plum blossom hole during grinding.

[0062] Liquid is transferred to the inner cavity of the intelligent roller 701 through the rotary liquid supply connector 712 and liquid replenishment port 711. While the intelligent grinding component 7 is rotating, the liquid, influenced by centrifugal force, rotates in contact with the inner wall of the intelligent roller 701. By designing the Pitot tube pickup tube 715, its end extends counter-currently into the rotating high-speed liquid ring zone. The high-speed liquid ring impacts the opening of the Pitot tube pickup tube 715, converting enormous kinetic energy into pressure energy. This makes the outlet of the Pitot tube pickup tube 715 a high-pressure source, continuously pumping liquid into the inner cavity of the static circulation pump core 716. A Venturi tube 713 is installed inside the static circulation pump core 716, and a negative pressure suction pipe 714 is placed at the Venturi tube 713. The high-pressure liquid, pressurized by the Pitot tube pickup tube 715, is immediately introduced into the static circulation pump core 716 and forced to flow through a narrower-diameter Venturi tube 713. The flow rate at the Venturi tube 713 surges, the pressure drops sharply, and a negative pressure is generated. The negative pressure is connected to the space between the central limiting ring 707 and the debris collection chamber 705 through the negative pressure suction tube 714. Like a vacuum cleaner, the grinding debris collected by the main spiral groove 702 and the secondary spiral groove 703 through the debris suction port 706 is forcefully "sucked" into the static circulation pump core 716 and discharged from the static circulation pump core 716.

[0063] By opening several slots on the outer wall of the static circulation pump core 716 near the rotary liquid supply connector 712, when the liquid is transferred through the first set of Pitot tube pump pickup tubes 715, the static circulation pump core 716 in the area of ​​the first set of Pitot tube pump pickup tubes 715 and the rotary liquid supply connector 712 will generate negative pressure. By opening several slots, the liquid in the inner cavity of the intelligent roller body 701 can enter the static circulation pump core 716 through the slots to achieve transfer.

[0064] It should be noted that when the intelligent grinding component 7 is rotating, the stationary circulating pump core 716 needs to remain fixed and not rotate synchronously with the intelligent roller body 701.

[0065] The static circulation pump core 716 can be fixed to external equipment in any way, such as by limiting the rotation of the static circulation pump core 716 through the drain pipe connected to the static circulation pump core 716, or by other methods to limit the rotation.

[0066] In a preferred embodiment: the active compensation mechanism 708 includes a telescopic actuator 7081, a compensation grinding head 7082 is fixedly mounted on the top telescopic end of the telescopic actuator 7081, an integrated pressure sensor 7083 is fixedly mounted on the outer wall of the compensation grinding head 7082, a telescopic displacement sensor 7084 is fixedly mounted on the inner cavity of the integrated pressure sensor 7083, and the top measuring end of the telescopic displacement sensor 7084 retractably protrudes from the outer wall of the integrated pressure sensor 7083.

[0067] During the grinding process of the intelligent grinding component 7 on the plum blossom hole, the distance from the inner wall of the ground plum blossom hole to the axis of the intelligent grinding component 7 is measured by the telescopic displacement sensor 7084, so as to detect whether the hole wall is uniform.

[0068] When the measurement shows that there is unevenness in the hole wall at a certain point in the plum blossom hole, the device can control the telescopic driver 7081 to drive the compensation grinding head 7082 to extend and retract, so that the contact state between the compensation grinding head 7082 and the hole wall is changed, thereby changing the grinding of the hole wall by the intelligent grinding component 7.

[0069] On the other hand, by compensating for the extension and retraction of the grinding head 7082, the intelligent grinding component 7 can be adapted to different specifications of plum blossom holes.

[0070] The working principle of this device can be divided into basic working mode and intelligent working mode, depending on the grinding components it is equipped with.

[0071] An external hydraulic motor 1 serves as a power source, providing stable and adjustable rotational torque;

[0072] Power is transmitted through coupling component 3, which functions like a universal joint, allowing for a certain angular and positional deviation between the hydraulic motor 1 and the axis of the grinding component, simplifying the alignment requirements during on-site installation.

[0073] The power is finally transmitted to the spline shaft component 4, which drives it and the grinding component connected to it to rotate. At the same time, the spline shaft body 401 and the inner spline hole 307 of the coupling component 3 form a sliding fit, allowing the grinding component to rotate while the operator pushes the bracket component 5 to achieve reciprocating movement along the axis of the spline hole.

[0074] The bracket component 5 provides stable moving support for the entire transmission and grinding system. By setting supports at both ends of the grinding component, the parallelism and stability of the grinding component during operation are ensured, and tilting caused by single-end cantilever force is avoided.

[0075] Working principle of intelligent grinding component 7

[0076] This mode integrates advanced functions such as active compensation and self-driven cooling and chip removal on top of the basic principles, and its workflow is highly coordinated:

[0077] The intelligent roller 701 rotates, and its internal active compensation mechanism 708 is activated;

[0078] The compensating grinding head 7082 located below the hole contacts the hole wall due to gravity, and the integrated pressure sensor 7083 behind it measures a reference pressure.

[0079] The control system uses this reference pressure as a target and precisely controls the compensation grinding head 7082 located above and on both sides of the hole to extend outward through the telescopic actuator 7081 until its pressure sensor reading matches the reference pressure. This process is carried out in real time through closed-loop control, thereby completely eliminating the influence of gravity and ensuring 360° uniform grinding.

[0080] Coolant enters the inner cavity of the intelligent roller 701 through the rotary liquid supply connector 712 and the liquid replenishment port 711. Under high-speed rotation, the liquid forms a high-speed rotating liquid ring on the inner wall due to centrifugal force.

[0081] The fixed Pitot tube pump pickup tube 715 has its opening facing the high-speed liquid ring in the opposite direction, converting the huge kinetic energy of the liquid into pressure energy, forming a high-pressure source for continuously pumping liquid without the need for an external power pump.

[0082] The pressurized liquid flows into the static circulation pump core 716 and is forced through the venturi tube 713 with a narrowed diameter. Here, the flow rate increases sharply and the pressure drops sharply, forming a strong negative pressure. At the same time, the grinding debris is guided by the main spiral groove 702 to the debris suction port 706 and is forcefully "sucked" into the static circulation pump core 716 by the negative pressure through the negative pressure debris suction pipe 714.

[0083] The liquid carrying debris is pumped out of the intelligent grinding component 7, filtered and cooled in the external unit, and then the clean, low-temperature liquid returns to the roller body through the rotary liquid supply connector 712, completing the entire self-driven closed-loop cycle.

[0084] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0085] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A grinding device for the plum blossom hole of a 20-roll mill stand, comprising a hydraulic motor (1), characterized in that: A motor support (2) is provided on one side of the output end of the hydraulic motor (1). A coupling component (3) is connected to the output end of the hydraulic motor (1). A spline shaft component (4) is sleeved on the output end of the coupling component (3). A bracket component (5) is sleeved on the outer wall of the spline shaft component (4). A grinding component is fixedly assembled on the end of the spline shaft component (4) away from the coupling component (3). The coupling component (3) includes an input half-coupling (301), a connecting slider (302) is rotatably connected to the end of the input half-coupling (301), an intermediate coupling (303) is rotatably connected to the end of the connecting slider (302), a connecting bushing (304) is fixedly fitted to the end of the intermediate coupling (303), an output half-coupling (305) is fixedly fitted to the end of the connecting bushing (304), and a spline bushing (306) is fixedly fitted to the end of the output half-coupling (305) through another set of connecting sliders (302). An internal spline hole (307) is opened on the end of the spline bushing (306) away from the input half-coupling (301). The spline shaft component (4) includes a spline shaft body (401), a rolling bearing (403) is fixedly mounted on the outer wall of the spline shaft body (401), a bearing seat (402) is fixedly mounted on the outer wall of the rolling bearing (403), a bearing end cap (404) is fixedly mounted on one side of the outer wall of the bearing seat (402), a support ring plate (405) is fixedly mounted on the outer wall of the bearing seat (402), and a shaft end fixing plate (406) is fixedly mounted on the end of the spline shaft body (401) away from the bearing seat (402). The spline shaft body (401) slides on the inner wall of the inner spline hole (307) and cannot rotate relative to each other; The bracket component (5) includes a fixed base (504), a guide rail frame (503) is fixedly mounted on the top of the fixed base (504), a guide groove (507) is provided on the inner wall of the guide rail frame (503), a bracket pressure frame (502) and a movable bracket (501) are provided on the inner wall of the guide groove (507), and a guide roller (505) is rotatably connected to the end of the bracket pressure frame (502) and the movable bracket (501) located on the inner wall of the guide groove (507). Roller baffles (506) are fixedly mounted on the ends of the bracket pressure frame (502) and the movable bracket (501) located on both sides of the guide rail frame (503). The bracket pressure frame (502) and the movable bracket (501) are connected to each other at the ends away from the guide rail frame (503).

2. The grinding device for the plum blossom hole of a 20-roll mill stand according to claim 1, characterized in that: Both ends of the grinding component are fixedly equipped with spline shaft components (4), and the outer walls of both sets of spline shaft components (4) are provided with bracket components (5) for support.

3. The grinding device for the plum blossom hole of a 20-roll mill stand according to claim 1, characterized in that: The grinding component is a basic grinding component (6). The basic grinding component (6) includes a basic roller body (601). The outer wall of the basic roller body (601) is provided with a main spiral groove (602) and a secondary spiral groove (603) that intersect each other. The outer walls at both ends of the basic roller body (601) are provided with end connecting grooves (604) that connect with the main spiral groove (602) and the secondary spiral groove (603).

4. The grinding device for the plum blossom hole of a 20-roll mill stand according to claim 1, characterized in that: The grinding component is an intelligent grinding component (7), which includes an intelligent roller (701). The outer wall of the intelligent roller (701) is provided with intersecting main spiral grooves (702) and secondary spiral grooves (703). The outer wall of the intelligent roller (701) is provided with a telescopic mechanism mounting seat (704). An active compensation mechanism (708) is fixedly mounted on the inner wall of the telescopic mechanism mounting seat (704). The inner wall of the intelligent roller (701) is provided with a debris collection cavity (705). The inner wall of the debris collection cavity (705) is rotatably connected with a central limiting ring (707). The inner wall of the debris collection cavity (705) is provided with a debris suction port (706). The debris suction port (706) is connected to the main spiral groove (702) and the secondary spiral groove. (703) Corresponding to the intersection, a support end connecting plate (709) is fixedly installed on one side of the intelligent roller body (701), and a drive end connecting plate (710) is fixedly installed on the other side of the intelligent roller body (701). A liquid supply port (711) is opened in the inner cavity of the drive end connecting plate (710). A rotary liquid supply connector (712) is rotatably sleeved on the outer wall of the drive end connecting plate (710). A static circulation pump core (716) is rotatably connected to the inner wall of the support end connecting plate (709). A venturi tube (713) is fixedly installed in the inner cavity of the static circulation pump core (716). A negative pressure chip suction tube (714) is fixedly connected to the inner cavity of the venturi tube (713). A Pitot tube pump pickup tube (715) is fixedly connected to the inner cavity of the static circulation pump core (716). The space between the negative pressure suction pipe (714) and the central limiting ring (707) and the debris collection chamber (705) is connected. The outer wall of the end of the Pitot tube pump pickup pipe (715) away from the static circulation pump core (716) is attached to the inner wall of the intelligent roller body (701). The outer wall of the static circulation pump core (716) near the rotary liquid supply connector (712) has several slots.

5. The grinding device for the plum blossom hole of a 20-roll mill stand according to claim 4, characterized in that: The active compensation mechanism (708) includes a telescopic actuator (7081), a compensation grinding head (7082) is fixedly mounted on the top telescopic end of the telescopic actuator (7081), an integrated pressure sensor (7083) is fixedly mounted on the outer wall of the compensation grinding head (7082), a telescopic displacement sensor (7084) is fixedly mounted on the inner cavity of the integrated pressure sensor (7083), and the top measuring end of the telescopic displacement sensor (7084) retractably protrudes from the outer wall of the integrated pressure sensor (7083).

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