Rolling mill roller distance adjusting structure

Abstract

The utility model relates to the technical field of rolling mill equipment, in particular to a rolling mill roller distance adjusting structure which can improve distance adjusting precision and reduce maintenance cost and downtime. Comprising a fixing frame, a lead screw, a distance adjusting driving mechanism, a distance adjusting nut assembly and a distance adjusting guide assembly. Two roller seats which are vertically distributed at intervals are arranged on the fixing frame, the two ends of the lead screw are rotationally installed on the fixing frame, and the axial direction of the lead screw is consistent with the moving direction of the roller seats; the distance adjusting driving mechanism is installed on the fixing frame, and the output end of the distance adjusting driving mechanism is connected with the lead screw. The distance adjusting nut assembly is connected to the lead screw in a screwed mode and fixedly connected with the roller base. The distance adjusting guide assembly is installed between the fixing frame and the roller base and used for conducting lifting motion on the roller base.

Description

Technical Field

[0001] This utility model relates to the technical field of rolling mill equipment, and in particular to a rolling mill roll pitch adjustment structure. Background Technology

[0002] A rolling mill is a device used in the metal rolling process. By applying pressure between rolls, it causes plastic deformation of the metal material, thereby changing its shape, size, and improving its properties to meet the needs of different industrial sectors. It is commonly used in the steel and non-ferrous metals processing industries. When rolling metals of different materials and thicknesses, the distance between the rolls needs to be adjusted to change the reduction, ensuring that the metal can pass smoothly through the rolls and achieve the desired deformation effect.

[0003] For precise adjustment, most existing rolling mill roll pitch adjustment structures employ screw drives. However, during long-term use, the immense pressure generated during rolling and frequent pitch adjustment operations lead to extremely intense friction between the screw and nut, causing them to wear easily. Once wear occurs, it not only affects the pitch adjustment accuracy, resulting in decreased product quality, but also necessitates frequent replacement of worn parts, increasing maintenance costs and downtime, and impacting production efficiency. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a rolling mill roll pitch adjustment structure that can improve pitch adjustment accuracy and reduce maintenance costs and downtime.

[0005] This utility model discloses a rolling mill roll pitch adjustment structure, including a fixed frame, a lead screw, a pitch adjustment drive mechanism, a pitch adjustment nut assembly, and a pitch adjustment guide assembly. The fixed frame has two roll seats spaced vertically apart. Both ends of the lead screw are rotatably mounted on the fixed frame, and the axial direction of the lead screw is consistent with the moving direction of the roll seats. The pitch adjustment drive mechanism is mounted on the fixed frame, and its output end is connected to the lead screw. The pitch adjustment nut assembly is screwed onto the lead screw and fixedly connected to the roll seats. The pitch adjustment guide assembly is installed between the fixed frame and the roll seats for controlling the lifting and lowering movement of the roll seats.

[0006] Furthermore, the adjustable torque drive mechanism includes a motor, a reducer, and a coupling. The output shaft of the motor is connected to the input shaft of the reducer, and the output shaft of the reducer is connected to a lead screw via a coupling.

[0007] Furthermore, the adjustable pitch nut assembly includes a nut body, balls, and a cage. The nut body has a threaded groove that mates with the lead screw. Several balls are arranged in the threaded groove and are evenly distributed in the threaded groove by the cage. The two ends of the nut body are provided with retaining rings to limit the axial movement of the balls.

[0008] Furthermore, the pitch adjustment guide assembly includes a guide rail and a slider. The guide rail is mounted on a fixed frame, and the extension direction of the guide rail is consistent with the axial direction of the lead screw. The slider is mounted on a roll seat, and the slider slides in cooperation with the guide rail.

[0009] Furthermore, the guide rail is a linear guide rail, with an oil storage chamber inside. An oil outlet channel communicating with the oil storage chamber is opened on the guide rail, and an oil pump that pumps lubricating oil into the oil outlet channel is also installed inside the oil storage chamber.

[0010] Furthermore, a protective shell is provided on the fixed frame, which covers the outside of the lead screw, adjusting nut assembly, and adjusting guide assembly.

[0011] Furthermore, it also includes a displacement monitoring component, which includes a displacement sensor and a display. The displacement sensor is mounted on the roll holder, and the display is electrically connected to the displacement sensor.

[0012] Furthermore, it also includes a limit assembly, which includes an upper limit switch and a lower limit switch, respectively mounted on the fixed frame and located at the upper limit position and lower limit position of the roll seat movement. The roll seat is provided with contacts that cooperate with the upper limit switch and the lower limit switch respectively.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. The adjustable pitch nut assembly uses a ball screw. The balls are evenly distributed in the thread groove of the nut body under the action of the cage, forming rolling friction with the screw. Compared with the sliding friction in traditional threaded screw drives, the rolling friction coefficient is much smaller, which helps to reduce the friction between the screw and the nut, reduce the degree of wear, and thus improve the accuracy of pitch adjustment.

[0015] 2. The pitch adjustment guide assembly precisely guides the lifting and lowering movement of the roll seat. The use of linear guide rails ensures the straightness and stability of the roll seat movement. The guide rails are equipped with oil storage chambers and oil outlet channels. Lubricating oil is pumped into the oil outlet channels through an oil pump to achieve continuous lubrication of the sliding parts between the slider and the guide rail. Good lubrication conditions further reduce friction and wear between the pitch adjustment guide assembly and extend its service life. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a partial structural schematic diagram of the present invention;

[0019] Figure 3 This is a cross-sectional view of the adjustable nut assembly of this utility model;

[0020] Figure 4 This is a cross-sectional view of the adjustable guide assembly of this utility model;

[0021] The attached diagram shows the following components: 1. Fixed frame; 2. Lead screw; 3. Adjustable pitch drive mechanism; 31. Motor; 32. Reducer; 33. Coupling; 4. Adjustable pitch nut assembly; 41. Nut body; 42. Ball bearing; 43. Cage; 44. Retaining ring; 5. Adjustable pitch guide assembly; 51. Guide rail; 52. Slider; 53. Oil reservoir; 54. Oil outlet channel; 55. Oil pump; 6. Roll seat; 7. Protective shell; 8. Displacement monitoring assembly; 81. Displacement sensor; 82. Display; 9. Limit assembly; 92. Lower limit switch; 93. Contact. Detailed Implementation

[0022] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0023] like Figures 1 to 4 As shown, this utility model discloses a mill roll pitch adjustment structure, including a fixed frame 1, a lead screw 2, a pitch adjustment drive mechanism 3, a pitch adjustment nut assembly 4, and a pitch adjustment guide assembly 5. The fixed frame 1 has two roll seats 6 spaced vertically apart. Both ends of the lead screw 2 are rotatably mounted on the fixed frame 1, and the axial direction of the lead screw 2 is consistent with the moving direction of the roll seats 6. The pitch adjustment drive mechanism 3 is mounted on the fixed frame 1, and its output end is connected to the lead screw 2. The pitch adjustment nut assembly 4 is screwed onto the lead screw 2 and fixedly connected to the roll seats 6. The pitch adjustment guide assembly 5 is installed between the fixed frame 1 and the roll seats 6, and is used to control the lifting and lowering movement of the roll seats 6.

[0024] The rolls are mounted on the roll holder 6. When the pitch adjustment drive mechanism 3 is activated, its output end drives the lead screw 2 to rotate. Since both ends of the lead screw 2 are rotatably mounted on the fixed frame 1, and its axial direction is consistent with the moving direction of the roll holder 6, the rotation of the lead screw 2 is converted into linear motion. The pitch adjustment nut assembly 4 screwed onto the lead screw 2 will move along the axial direction of the lead screw 2 as the lead screw 2 rotates. At the same time, the roll holder 6 follows the pitch adjustment nut assembly 4 to perform corresponding lifting and lowering movements. During the lifting and lowering process of the roll holder 6, the pitch adjustment guide assembly 5 guides its movement, ensuring that the roll holder 6 moves smoothly along the predetermined direction, thereby accurately adjusting the distance between the two roll holders 6 and changing the amount of compression between the rolls. Compared with the problem of decreased accuracy due to wear in traditional threaded screw drives, the presence of the pitch adjustment guide assembly 5 reduces the offset and sway of the roll holder 6 during movement, making the adjustment of the roll gap more precise and helping to ensure the stability of product quality.

[0025] The pitch adjustment drive mechanism 3 includes a motor 31, a reducer 32, and a coupling 33. The output shaft of the motor 31 is connected to the input shaft of the reducer 32, and the output shaft of the reducer 32 is connected to the lead screw 2 via the coupling 33. After the motor 31 is powered on, its output shaft begins to rotate, converting electrical energy into mechanical energy. The higher speed output by the motor is reduced by the reducer 32. The reducer 32 reduces the speed while increasing the torque through the cooperation of gears or other transmission components to meet the requirements for force and precise control during the roll pitch adjustment process. The power after speed adjustment and torque amplification by the reducer 32 is output from its output shaft. The coupling 33 connects and transmits the torque, smoothly transferring the power output by the reducer 32. The power is transmitted to the lead screw 2, which rotates the lead screw 2, thereby driving the adjusting nut assembly 4 to move, ultimately raising and lowering the roll seat 6 and adjusting the roll spacing. While the coupling 33 effectively transmits power, it also compensates for installation errors between the motor shaft and the lead screw shaft to a certain extent, reducing additional stress and vibration caused by shaft misalignment and other problems. This helps protect key components such as the motor 31, reducer 32, and lead screw 2, extending their service life and reducing maintenance costs. The motor 31 has good dynamic response characteristics, enabling it to start, stop, and change rotation direction quickly in a short time. This allows the roll spacing adjustment structure to be quickly adjusted according to the requirements of the production process, adapting to different rolling tasks and improving production efficiency.

[0026] The adjustable pitch nut assembly 4 includes a nut body 41, balls 42, and a retainer 43. The nut body 41 has a threaded groove that mates with the lead screw 2. Several balls 42 are arranged within the threaded groove, evenly distributed within it by the retainer 43. Retaining rings 44 are provided at both ends of the nut body 41 to restrict the axial movement of the balls 42. When the lead screw 2 rotates, the balls 42 roll between the thread of the lead screw 2 and the threaded groove of the nut body 41, causing the nut body 41 to move axially along the lead screw 2. This, in turn, drives the connected roll seat to rise and fall, thus adjusting the roll gap. This design eliminates the sliding friction inherent in traditional threaded connections. The friction is transformed into rolling friction, and the coefficient of rolling friction is much smaller than that of sliding friction, which reduces the friction and wear rate between the lead screw 2 and the nut. When the lead screw 2 rotates, it is easier to drive the nut to move. The position of the ball 42 is fixed by the retainer 43, so that each ball 42 can evenly bear the force between the lead screw 2 and the nut body 41, ensuring that the ball 42 runs smoothly during rolling and avoiding problems such as uneven wear caused by excessive local force. The retaining ring 44 prevents the ball 42 from slipping off both ends of the thread groove during rolling, ensuring that the ball always works normally within the set track, maintaining the stability and reliability of the entire adjustable pitch nut assembly 4.

[0027] The pitch adjustment guide assembly 5 includes a guide rail 51 and a slider 52. The guide rail 51 is mounted on the fixed frame 1, and the extension direction of the guide rail 51 is consistent with the axial direction of the lead screw 2. The slider 52 is mounted on the roll seat 6, and the slider 52 slides in cooperation with the guide rail 51. The guide rail 51 provides stable support and precise motion path constraint for the slider 52. When the pitch adjustment drive mechanism 3 drives the lead screw 2 to rotate, and then the pitch adjustment nut assembly 4 screwed on the lead screw 2 drives the roll seat 6 to move, the slider 52 moves linearly along the direction defined by the guide rail 51, avoiding the roll seat 6 from deflection, shaking or rotation during the movement, thereby ensuring that the pitch adjustment between the rolls can be carried out accurately and stably, thus ensuring the dimensional accuracy and quality stability of the rolled products and meeting the strict requirements of different industrial fields for the shape and size of metal materials.

[0028] The guide rail 51 is a linear guide rail, and an oil storage chamber 53 is provided inside the guide rail 51. An oil outlet channel 54 communicating with the oil storage chamber 53 is opened on the guide rail 51. An oil pump 55 is also provided in the oil storage chamber 53 to pump lubricating oil into the oil outlet channel 54. The lubricating oil flowing out from the oil outlet channel 54 will form an oil film between the sliding mating surfaces of the guide rail 51 and the slider 52 to reduce the direct contact friction between the two and play a lubricating role, so that the slider 52 slides more smoothly on the guide rail 51. Good lubrication can significantly reduce the wear between the guide rail 51 and the slider 52, and extend the service life of the guide rail 51 and the slider 52. At the same time, the lubricating oil can also carry away the heat generated by friction, play a certain heat dissipation role, and help maintain the performance stability of the guide rail 51 and the slider 52.

[0029] A protective shell 7 is installed on the fixed frame 1, covering the outside of the lead screw 2, the adjusting nut assembly 4, and the adjusting guide assembly 5. The protective shell 7 encloses the key components of the adjusting mechanism within its internal space, forming a relatively closed area. This effectively prevents various foreign objects such as dust, debris, and metal particles from entering the industrial production environment, thus preventing malfunctions such as accelerated wear and jamming caused by foreign objects. This ensures the normal operation of the adjusting structure and improves the reliability and stability of the equipment. At the same time, it also serves as an isolation mechanism, separating the hazardous area from the outside world and preventing operators from accidentally coming into contact with these moving parts during equipment operation. This reduces the possibility of personal injury accidents and ensures the personal safety of operators.

[0030] To accurately monitor changes in roll spacing, a displacement monitoring component 8 is installed. This component includes a displacement sensor 81 and a display 82. The displacement sensor 81 is mounted on the roll holder 6, and the display 82 is electrically connected to it. When the roll holder 6 moves up and down along the adjustment guide component 5 via the adjustment nut assembly 4 under the action of the adjustment drive mechanism 3, the displacement sensor 81 senses the position change of the roll holder 6 relative to a fixed reference point and converts this position change into an electrical signal, which is transmitted to the display 82. The display 82 processes and analyzes the received electrical signal, converting it into an intuitive displacement value and displaying it in numerical or graphical form. This allows for real-time monitoring of the roll holder 6's displacement information, enabling timely adjustments and preventing rolling problems caused by inaccurate roll spacing, reducing scrap production, and improving production efficiency.

[0031] To enhance safety, a limit assembly 9 is also provided. The limit assembly 9 includes an upper limit switch and a lower limit switch 92, which are respectively mounted on the fixed frame 1 and located at the upper and lower limit positions of the roll holder 6. The roll holder 6 is equipped with contacts 93 that respectively cooperate with the upper limit switch and the lower limit switch 92. When the roll holder 6 moves up and down along the adjusting guide assembly 5 under the drive of the adjusting drive mechanism 3, the contacts 93 mounted on the roll holder 6 move synchronously with the movement of the roll holder 6. When the roll holder 6 rises to the upper limit position, the contacts 93 will touch the upper limit switch mounted on the fixed frame 1 at the upper limit position. The upper limit switch is triggered; similarly, when the roll holder 6 descends to the lower limit position, the contact 93 will touch the lower limit switch 92 installed on the fixed frame 1 at the lower limit position, triggering the lower limit switch 92 to operate; after the upper limit switch and the lower limit switch 92 are triggered, they will transmit the corresponding electrical signals to the rolling mill, immediately stopping the operation of the pitch adjustment drive mechanism 3, thereby preventing the roll holder 6 from continuing to move beyond the predetermined movement range, avoiding collision between the roll holder 6 and the fixed frame 1 or other components, thus protecting key components such as the lead screw 2, the pitch adjustment nut assembly 4, and the pitch adjustment guide assembly 5 from damage, and helping to maintain the stability of the rolling mill operation.

[0032] This utility model discloses a rolling mill roll pitch adjustment structure. During operation, the output shaft of motor 31 rotates, driving the input shaft of the connected reducer 32 to rotate. After the reducer 32 reduces speed and increases torque, its output shaft transmits power to the lead screw 2 via coupling 33, causing the lead screw 2 to rotate. The pitch adjustment nut assembly 4, screwed onto the lead screw 2, has its internal balls 42 rolling within the threaded grooves under the rotation of the lead screw 2, converting the rotational motion of the lead screw 2 into linear motion, thus allowing the pitch adjustment nut assembly 4 to move axially along the lead screw 2. Since the pitch adjustment nut assembly 4 is fixedly connected to the roll seat 6... Therefore, the roll holder 6 moves together with the adjusting nut assembly 4. During the movement of the roll holder 6, the adjusting guide assembly 5 plays a guiding role, and the slider 52 on the roll holder 6 slides along the guide rail 51 on the fixed frame 1 to ensure that the roll holder 6 can only move in a straight line in the same direction as the screw 2, avoiding deviation, shaking and other situations. At the same time, the displacement sensor 81 installed on the roll holder 6 senses the displacement change of the roll holder 6 in real time and converts the displacement signal into an electrical signal and transmits it to the display 82 for display. The operator can understand the displacement of the roll holder 6 at any time through the display 82.

[0033] The present invention relates to a mill roll pitch adjustment structure. Its installation method, connection method, or setting method are all common mechanical methods. As long as it can achieve its beneficial effect, it can be implemented.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A mill roll pitch adjustment structure, characterized in that, The device includes a fixed frame (1), a lead screw (2), a pitch adjustment drive mechanism (3), a pitch adjustment nut assembly (4), and a pitch adjustment guide assembly (5). The fixed frame (1) is provided with two roll seats (6) spaced apart vertically. The two ends of the lead screw (2) are rotatably mounted on the fixed frame (1), and the axial direction of the lead screw (2) is consistent with the moving direction of the roll seats (6). The pitch adjustment drive mechanism (3) is mounted on the fixed frame (1), and its output end is connected to the lead screw (2). The pitch adjustment nut assembly (4) is screwed onto the lead screw (2) and fixedly connected to the roll seats (6). The pitch adjustment guide assembly (5) is installed between the fixed frame (1) and the roll seats (6) for lifting and lowering the roll seats (6).

2. The mill roll pitch adjustment structure as described in claim 1, characterized in that, The adjustable drive mechanism (3) includes a motor (31), a reducer (32) and a coupling (33). The output shaft of the motor (31) is connected to the input shaft of the reducer (32), and the output shaft of the reducer (32) is connected to the lead screw (2) through the coupling (33).

3. The mill roll pitch adjustment structure as described in claim 1, characterized in that, The adjustable pitch nut assembly (4) includes a nut body (41), balls (42) and a retainer (43). The nut body (41) has a threaded groove that mates with the lead screw (2). A plurality of balls (42) are provided in the threaded groove. The plurality of balls (42) are evenly distributed in the threaded groove by the retainer (43). The two ends of the nut body (41) are provided with retaining rings (44) for limiting the axial movement of the balls (42).

4. The mill roll pitch adjustment structure as described in claim 1, characterized in that, The pitch adjustment guide assembly (5) includes a guide rail (51) and a slider (52). The guide rail (51) is mounted on the fixed frame (1), and the extension direction of the guide rail (51) is consistent with the axial direction of the lead screw (2). The slider (52) is mounted on the roll seat (6), and the slider (52) slides with the guide rail (51).

5. The mill roll pitch adjustment structure as described in claim 4, characterized in that, The guide rail (51) is a linear guide rail. The guide rail (51) is provided with an oil storage chamber (53). An oil outlet channel (54) communicating with the oil storage chamber (53) is provided on the guide rail (51). An oil pump (55) for pumping lubricating oil into the oil outlet channel (54) is also provided in the oil storage chamber (53).

6. The mill roll pitch adjustment structure as described in claim 1, characterized in that, The fixed frame (1) is provided with a protective shell (7), which covers the outside of the lead screw (2), the adjusting nut assembly (4) and the adjusting guide assembly (5).

7. The mill roll pitch adjustment structure as described in claim 1, characterized in that, It also includes a displacement monitoring component (8), which includes a displacement sensor (81) and a display (82). The displacement sensor (81) is mounted on the roll holder (6), and the display (82) is electrically connected to the displacement sensor (81).

8. The mill roll pitch adjustment structure as described in claim 1, characterized in that, It also includes a limit assembly (9), which includes an upper limit switch and a lower limit switch (92), which are respectively installed on the fixed frame (1) and located at the upper limit position and the lower limit position of the roll seat (6) movement. The roll seat (6) is provided with contacts (93) that cooperate with the upper limit switch and the lower limit switch (92) respectively.

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