A straightening machine operating side press-down device

Abstract

This utility model belongs to the technical field of straightening machines, and relates to a pressing device on the operating side of a straightening machine, mainly solving the problems of difficult maintenance and bulky structure of traditional keyway locking methods. The device includes core components such as a turbine, a pressing screw, a pressing nut, and a locking nut with a saw kerf. Tightening the saw kerf-side screw causes radial deformation of the locking nut, achieving thread engagement and self-locking. Combined with the integrated layout on the top of the frame, maintenance efficiency is significantly improved. Simultaneously, a displacement sensor detects the displacement of the pressing screw in real time and feeds it back to the PLC system, achieving high-precision closed-loop control of the roll gap. The spherical pad structure reduces off-center wear, and the corrugated cover effectively isolates lubricant contamination. This solution shortens the pressing force transmission path, reduces the difficulty of frame processing, and facilitates daily maintenance, making it suitable for high-precision straightening operations on various rolled materials.

Description

Technical Field

[0001] This utility model belongs to the field of straightening machine technology and relates to a straightening machine operation side pressing device. Background Technology

[0002] As an indispensable key piece of equipment in the steel production process, the straightening machine undertakes the important task of straightening rolled steel. Its purpose is to eliminate defects such as bending, twisting, and wavy shapes generated during rolling and cooling, ensuring that the steel meets strict standards of straightness and dimensional accuracy to satisfy the quality requirements of subsequent processing or direct use. In this complex and delicate process, the operating side pressing device of the straightening machine plays a central role; its performance and reliability directly affect the straightening effect, production efficiency, and equipment maintenance costs.

[0003] The design of the operating side pressing device of a traditional straightening machine mainly revolves around achieving precise vertical movement of the upper straightening roller system to adjust the roller gap size and adapt to the straightening needs of steel of different specifications and materials. Its core components typically include a turbine, pressing screw, pressing nut, keyway locking mechanism, and transmission system. During operation, the turbine rotates under the drive of the transmission system, converting the rotational motion into linear motion of the pressing screw through a threaded joint. This, in turn, drives the upper straightening roller system to rise or fall, thereby adjusting the roller gap.

[0004] In traditional designs, a keyway locking method is commonly used to ensure that the pressure nut does not move along the turbine shaft during turbine rotation. This method uses a keyway structure between the pressure nut and the frame to restrict the rotational freedom of the pressure nut, thus achieving an anti-rotation effect. In practice, the pressure nut cover is bolted to the frame, and the key on the cover fits tightly with the keyway on the pressure nut, forming a stable mechanical connection.

[0005] However, the keyway locking method has revealed many limitations in practical applications:

[0006] 1. Difficult maintenance and repair: The keyway locking mechanism is located between the frame and the pressing nut, in a confined space, making operation inconvenient. When it is necessary to replace or adjust the pressing nut or repair keyway wear, it is often necessary to disassemble a large number of peripheral parts, or even partially disassemble the equipment, resulting in time-consuming and labor-intensive maintenance work, increasing downtime and maintenance costs.

[0007] 2. Bulky Structure and Increased Cost: To ensure the strength and rigidity of the keyway connection, traditional designs often use large-sized keys and keyways, resulting in bulky and heavy pressure nuts and caps. This not only increases raw material consumption and manufacturing costs but also increases the difficulty and cost of frame processing due to the need for more installation space. Furthermore, excessively large structural dimensions may also affect the overall layout and flexibility of the equipment.

[0008] 3. Reduced frame strength: As the supporting skeleton of the straightening machine, the strength and rigidity of the frame are crucial to the stable operation of the equipment. However, the traditional keyway locking method requires the frame to have large holes to install the press-down nut and pressure cap. This process inevitably weakens the local strength of the frame, especially under high load and long-term operation conditions, which may lead to safety hazards such as frame deformation and cracks.

[0009] 4. Limited control precision and response speed: Traditional straightening devices lack real-time feedback and closed-loop control mechanisms. Roll gap adjustment mainly relies on manual experience or open-loop control, making it difficult to meet the adjustment requirements of high precision and rapid response. With frequent changes in steel specifications or increased requirements for straightening processes, the control capabilities of traditional devices become inadequate, affecting straightening quality and production efficiency.

[0010] Therefore, given the numerous problems with the traditional straightening machine's side-pressure device and the market's urgent need for high-precision, high-efficiency straightening equipment, technological innovation has become an inevitable trend. Utility Model Content

[0011] In view of this, the purpose of this utility model is to provide a pressing device on the operating side of a straightening machine to overcome the above problems, thereby reducing production costs and facilitating daily maintenance.

[0012] To achieve the above objectives, this utility model provides the following technical solution: a pressing device on the operating side of a straightening machine, installed in a pre-reserved hole on the operating side of the frame, connected to a pressing transmission device and acting on the upper straightening roller system, including a pressing screw installed in the frame, a turbine and a pressing nut screwed to the outside of the pressing screw, and a locking device installed outside the pressing nut; the top surface of the turbine and the bottom surface of the pressing nut are respectively provided with corresponding pin holes, and a force transmission pin is provided in the pin holes. The pressing screw passes through the turbine and the pressing nut by rotation, and its bottom acts as the upper straightening roller bearing seat of the upper straightening roller system; the locking device is installed on the top of the frame, and from bottom to top are respectively provided a bearing sleeve, a bearing, a pressure ring and a locking nut. The locking nut is threaded with the outer circumference of the pressing nut. The locking nut has a saw slit along the circumferential direction, and the top of the locking nut has a threaded hole on the saw slit side for screwing in a bolt for locking.

[0013] Optionally, the turbine is located in a pre-reserved stepped hole in the frame and driven by a pressing transmission device. The turbine is threadedly matched with the pressing screw, and the turbine rotates under the drive of the pressing transmission device during operation.

[0014] Optionally, the kerf depth and threaded hole size of the locking nut can be adjusted according to the preset locking force, and the projection of the threaded hole in the vertical direction falls entirely on the kerf.

[0015] Optionally, the locking nut has multiple blind holes at a height below the saw kerf on its circumference for inserting a matching rotating rod for operation.

[0016] Optionally, the top of the frame is provided with a reserved bearing sleeve step surface, and the bearing sleeve is set in the reserved bearing sleeve step surface.

[0017] Optionally, the top of the upper straightening roller bearing seat is provided with a preset groove, in which a spherical pad is installed with tolerance fit. The bottom spherical surface of the pressing screw fits tightly with the spherical pad, and the spherical pad is pressed into the upper straightening roller bearing seat by fasteners.

[0018] Optionally, a corrugated cover is also provided between the frame and the upper straightening roller bearing seat. The top of the corrugated cover is fixedly connected to the frame by fasteners, and the bottom has a lower contact surface. The lower contact surface is snapped between the bottom of the pressing screw and the top of the upper straightening roller bearing seat and is pressed by fasteners.

[0019] Optionally, the corrugated cover has a telescopic function, and the telescopic stroke is greater than the maximum working reduction value of the upper straightening roller system to meet the working range of the entire reduction stroke.

[0020] Optionally, the locking device is also equipped with a protective cover on the top of the frame, on which a displacement sensor is installed, and a magnetic ring matching the displacement sensor is installed on the pressing screw; the displacement sensor is also connected to a PLC control system.

[0021] Optionally, a waterproof cover is installed on the outer protective cover of the displacement sensor. The waterproof cover has a through hole for the displacement sensor cable to pass through, which facilitates installation and maintenance.

[0022] The beneficial effects of this utility model are as follows:

[0023] First, the device significantly improves maintenance efficiency and convenience through its innovative locking structure design. Located at the top of the frame, the locking mechanism offers unobstructed space, facilitating installation, inspection, and routine maintenance. This effectively solves the problems of difficult maintenance and limited operating space associated with traditional keyway locking methods, reducing maintenance costs and downtime.

[0024] Secondly, the device employs a locking nut design with a saw kerf. Tightening the screw causes radial deformation of the locking nut, achieving a self-locking effect on the thread. This design is not only simple and reliable in structure, but also has a short torque transmission path and optimized stress conditions, reducing the risk of deformation and failure caused by excessive stress on structural components, and improving the overall stability and service life of the equipment.

[0025] Furthermore, the device integrates a displacement sensor and a PLC control system, achieving high-precision closed-loop control of the roll gap. The displacement sensor detects the displacement of the pressing screw in real time and feeds the data back to the PLC system. This data is compared and analyzed with preset values, and the pressing drive is automatically adjusted to ensure the roll gap accuracy meets the set requirements. This function greatly improves the precision and consistency of the straightening operation, meeting the production needs of high-precision rolled materials.

[0026] Furthermore, the spherical pad structure in the device effectively reduces off-center wear, improving the equipment's adaptability and durability. The corrugated cover design isolates lubrication contamination, protecting components from external environmental influences and extending the equipment's service life. Simultaneously, the device's lightweight and compact structural components reduce raw material input and production costs, enhancing its market competitiveness.

[0027] In summary, the operating side pressing device of this straightening machine, through its innovative design, achieves multiple beneficial effects such as efficient locking, precise control, easy maintenance, and low-cost operation, providing strong support for high-precision and high-efficiency production in the steel rolling industry.

[0028] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0030] Figure 1 This is a schematic diagram of the overall assembly of this utility model;

[0031] Figure 2 This is a schematic diagram of the operating side pressing device of this utility model;

[0032] Figure 3 This is a schematic diagram of the locking nut of this utility model;

[0033] Figure 4 for Figure 3 The left view.

[0034] Reference numerals: 1-Pressing transmission device; 2-Frame; 3-Upper straightening roller system; 4-Operating side pressing device; 5-Saw kerf; 6-Blind hole; 7-Threaded hole; 301-Upper straightening roller bearing seat; 401-Spherical pad; 402-Pressing screw; 403-Turbine; 404-Force transmission pin; 405-Pressing nut; 406-Bearing sleeve; 407-Bearing; 408-Pressure ring; 409-Locking nut; 410-Waterproof cover; 411-Displacement sensor; 412-Protective cover; 413-Corrugated cover. Detailed Implementation

[0035] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0036] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0037] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model 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. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0038] Please see Figures 1-4 This is a pressing device on the operating side of a straightening machine. The pressing device is installed in a pre-drilled hole on the operating side of the frame 2, connected to the pressing transmission device 1, and acts on the upper straightening roller system 3. The overall layout is compact, and the components are precisely matched to ensure efficient and stable pressing operation.

[0039] according to Figure 2 As shown, the installation steps of the operating side pressing device are as follows: the turbine 403 is installed in the reserved hole of the frame 2, then the force transmission pin 404 is placed in the pin hole on the top surface of the turbine 403, and the pressing nut 405 with the pin hole end is tightly attached to the top surface of the turbine 403. The bearing sleeve 406, bearing 407 and pressure ring 408 are sequentially fitted onto the outer circumference of the pressing nut 405 in the order shown in the figure, and the locking nut 409 is threaded into the outer circumference of the pressing nut 405. The pressing screw 402 is inserted into the turbine 403 and pressing nut 405 from the lower end of the frame 2 shown in the figure by rotation, and then the locking nut 409 is rotated to make the bearing sleeve 406 tightly fit with the reserved bearing sleeve step surface of the frame 2. At this time, in order to prevent the locking nut 409 from rotating in the opposite direction during operation and causing the anti-loosening failure, the bolt needs to be tightened. Figure 4 In the threaded hole 7 shown, the gap at the saw kerf 5 of the locking nut 409 deforms inward towards the saw kerf 5, thereby causing the internal thread of the locking nut 409 to engage with the external thread of the pressing nut 405, achieving an anti-loosening effect under the action of friction force. In the locked state, the lower plane of the bearing sleeve 406 and the upper plane of the turbine 403 form a clamping state with the stepped surface of the reserved hole in the frame.

[0040] Furthermore, the locking force can be flexibly adjusted by the depth of the kerf 5 (circumferential cut) and the size of the threaded hole 7 provided in the locking nut 409. When rotating the locking nut 409, the blind hole 6 provides a convenient way for the operator to insert a matching rotating rod or other tools.

[0041] Furthermore, the projection of the threaded hole 7 in the vertical direction falls within the plane of the saw kerf 5, and the downward depth of the threaded hole 7 exceeds the plane of the saw kerf 5, falling within the plane of the blind hole 6 (deepening to a certain depth) or penetrating the entire plane.

[0042] Furthermore, there are two threaded holes symmetrically arranged about the blind hole (the number is not fixed, but they can be staggered from the location of the blind hole).

[0043] The spherical pad 401 is installed in the pre-set groove of the upper straightening roller bearing seat 301 with tolerance fit. The bottom spherical surface of the screw 402 is pressed down to fit tightly against the spherical pad 401, and the spherical pad 401 is pressed into the lower contact surface of the corrugated cover 413 by fasteners. Finally, the upper end face of the corrugated cover 413 is fixed to the frame 2 by fasteners.

[0044] Furthermore, the corrugated cover 413 has a telescopic function, and the telescopic stroke is greater than the maximum working reduction value of the upper straightening roller system to meet the working range of the entire reduction stroke.

[0045] During operation, the turbine 403 and the pressing nut 405 rotate under the drive of the pressing transmission device 1, but this does not cause relative displacement between the turbine 403 and the pressing nut 405 and the frame 2 along the axial direction of the pressing screw 402 (upward displacement is blocked by the pre-set stepped surface of the frame and cannot move upward; downward movement is also prevented because the locking nut and the screw can be considered as a whole due to the locking effect of the locking nut). The turbine 403 converts the power provided by the pressing transmission device 1 into the driving force for the up and down movement of the pressing screw 402, which then drives the upper straightening roller bearing seat 301 to move up and down, ultimately achieving the pressing function.

[0046] The displacement sensor 411 is fixed to the protective cover 412, while the sensing magnetic ring is fixed to the pressing screw 402. The rotation of the pressing screw 402 causes a relative displacement between the sensing magnetic ring and the displacement sensor 411, providing real-time feedback on the roll gap change of the pressing screw 402 and the upper straightening roller system 3. The displacement sensor 411 transmits the sensed change value back to the PLC control system and compares it with the system's preset value. If there is still a deviation from the preset value, further adjustment is performed until the deviation is within the allowable range, thereby achieving precise control of the pressing transmission device 1. The waterproof cover 410 has a through hole for the displacement sensor 411 cable to pass through, facilitating installation and maintenance.

[0047] One point to note is that when machining the turbine 403 and the force transmission pin hole of the press-down nut 405, pre-assembly should be performed first, and then the machining position of the force transmission pin hole should be marked before machining the force transmission pin hole, in order to prevent gaps from forming between the contact surface of the press-down nut 405 and the turbine 403 during installation.

[0048] When it is necessary to unlock the anti-loosening state shown in the figure, simply loosen the screw on the locking nut 409 to restore the saw kerf 5 to its original state, so that the threads of the pressing nut 405 and the locking nut 409 are no longer tightly engaged.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A pressing device on the operating side of a straightening machine, installed in a pre-drilled hole on the operating side of the frame, connected to a pressing transmission device and acting on the upper straightening roller system, characterized in that: It includes a pressing screw installed inside the frame, a turbine and a pressing nut screwed to the outside of the pressing screw, and a locking device installed outside the pressing nut; The top surface of the turbine and the bottom surface of the pressing nut are respectively provided with corresponding pin holes, and a force transmission pin is provided in the pin hole. The pressing screw is inserted into the turbine and the pressing nut by rotation, and its bottom acts as the upper straightening roller bearing seat of the straightening roller system. The locking device is located on the top of the frame, and from bottom to top, there are bearing sleeves, bearings, pressure rings and locking nuts respectively. The locking nut is threaded to the outer circumference of the pressing nut. The locking nut has a saw slit along the circumference, and the top of the locking nut has a threaded hole on the side of the saw slit for screwing in a bolt for locking.

2. The straightening machine operation side pressing device according to claim 1, characterized in that: The turbine is installed in a pre-reserved stepped hole in the frame and driven by a pressing transmission device. The turbine and the pressing screw are threadedly matched. During operation, the turbine rotates under the drive of the pressing transmission device.

3. The straightening machine operation side pressing device according to claim 1, characterized in that: The kerf depth and threaded hole size of the locking nut are adjusted according to the preset locking force. The vertical projection of the threaded hole falls entirely on the saw kerf, and the downward depth of the threaded hole extends beyond the saw kerf.

4. The straightening machine operation side pressing device according to claim 1, characterized in that: The locking nut has multiple blind holes on its circumference at a height below the saw kerf, for inserting a matching rotating rod for operation.

5. The straightening machine operation side pressing device according to claim 1, characterized in that: The top of the frame is provided with a reserved bearing sleeve step surface, and the bearing sleeve is set in the reserved bearing sleeve step surface.

6. The straightening machine operation side pressing device according to claim 1, characterized in that: The top of the upper straightening roller bearing seat is provided with a preset groove, and a spherical pad is installed in the preset groove with tolerance fit. The bottom spherical surface of the pressing screw is in close contact with the spherical pad, and the spherical pad is pressed into the upper straightening roller bearing seat by fasteners.

7. The straightening machine operation side pressing device according to claim 6, characterized in that: A corrugated cover is also provided between the frame and the upper straightening roller bearing seat. The top of the corrugated cover is fixedly connected to the frame by fasteners, and the bottom has an inwardly fitting surface. The lower contact surface is engaged between the bottom of the pressing screw and the top of the upper straightening roller bearing seat, and is tightened by the fastener.

8. The straightening machine operation side pressing device according to claim 7, characterized in that: The corrugated cover has a telescopic function, and the telescopic stroke is greater than the maximum working pressure value of the upper straightening roller system to meet the working range of the entire pressure stroke.

9. The straightening machine operation side pressing device according to claim 1, characterized in that: The locking device is also equipped with a protective cover on the top of the frame. The protective cover is equipped with a displacement sensor, and the pressing screw is equipped with a sensing magnetic ring that matches the displacement sensor. The displacement sensor is also connected to a PLC control system.

10. The straightening machine operation side pressing device according to claim 9, characterized in that: The displacement sensor is protected by a waterproof cover with a through hole for the displacement sensor cable to pass through, facilitating installation and maintenance.

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