Automatic roll changing device for a multi-roll rolling mill

Abstract

The utility model discloses a kind of multi-roller automatic roll changing device of rolling mill;Including roll adapter shaft and clamping rotating mechanism, the roll adapter shaft has connecting shaft section and the inner plug-in shaft section connected with the clamping rotating mechanism, the connecting shaft section is opened with the accommodation groove for inserting roll, locking piece is equipped on the accommodation groove, the clamping rotating mechanism is connected with the adjusting mechanism for adjusting its spatial position.The utility model roll adapter shaft can be fixed on clamping rotating mechanism, the roll to be replaced can be fixed on roll adapter shaft, clamping rotating mechanism can also adjust spatial position under the action of adjusting mechanism, move roll to target position, to realize the automatic replacement of roll, simplify replacement process, improve transmission roll replacement efficiency.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical equipment technology, and in particular to an automatic roll changing device for a multi-roll mill. Background Technology

[0002] A rolling mill is a mechanical device that uses the gap between one or more pairs of rotating rolls to apply pressure to a workpiece, causing it to undergo plastic deformation, thereby obtaining plates, strips, profiles, or tubes with the desired shape, size, and properties. Rolling mills can be classified according to the number of rolls: two-roll, four-roll, six-roll, eight-roll, twelve-roll, eighteen-roll, twenty-roll, etc. A twenty-roll mill has four drive rolls, which require more frequent and complex replacement.

[0003] Traditionally, drive rolls are replaced using a counterweight. The process involves a crane lifting the counterweight, inserting the drive roll shaft into the counterweight's mounting hole, manually locking it, and then lifting both the counterweight and drive roll into the mill stand. The drive shaft is then adjusted to a low speed and positioned appropriately. The drive roll's split head is slowly rotated until it aligns with the drive shaft's split hole, and this adjustment is repeated until the split head is fully inserted. Finally, the drive roll is lifted using a fixture and installed into the operating side bearing housing and suspension, completing the roll change. This process of replacing drive rolls using a counterweight is cumbersome, time-consuming, and labor-intensive. Therefore, there is an urgent need for an automatic roll changing device for multi-roll mills to solve these problems. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides an automatic roll changing device for a multi-roll mill, comprising a roll transfer shaft and a clamping and rotating mechanism. The roll transfer shaft has a connecting shaft section and an insert shaft section connected to the clamping and rotating mechanism. The connecting shaft section has a receiving groove for inserting a roll, and a locking element is provided on the receiving groove. The clamping and rotating mechanism is connected to an adjustment mechanism for adjusting its spatial position.

[0005] Furthermore, the clamping and rotating mechanism includes a jaw, a clamping drive unit for driving the jaw to clamp or open, and a rotation drive unit for driving the jaw to rotate, wherein the roll adapter shaft is engaged with the jaw for clamping.

[0006] Furthermore, the gripper includes a guide chuck and a plurality of wedge-shaped grippers, each of the wedge-shaped grippers being arranged circumferentially on the guide chuck. The clamping drive unit includes a bushing and a clamping drive assembly. The bushing has a wedge-shaped inner cavity. The guide chuck portion and the wedge-shaped grippers are movably disposed within the wedge-shaped inner cavity. The guide chuck is connected to the output end of the clamping drive assembly.

[0007] Furthermore, one end of the wedge-shaped inner cavity is provided with a limiting boss, and the guide chuck is provided with a shoulder that axially limits and cooperates with the limiting boss.

[0008] Furthermore, the clamping drive assembly includes a lead screw, a lead screw nut, and a clamping motor. The lead screw and the lead screw nut are both disposed within the bushing. The clamping motor is mounted on the bushing. The lead screw nut is connected to the output end of the clamping motor. The lead screw is threadedly connected to the lead screw nut. The end of the lead screw away from the lead screw nut is connected to the guide chuck.

[0009] Furthermore, the rotation drive unit includes a bearing housing and a rotation motor. The bearing housing is sleeved on the outside of the bushing and connected to the bushing via a bearing. The rotation motor is mounted on the bearing housing and is drivenly connected to the bushing.

[0010] Furthermore, the receiving groove of the connecting shaft section is a stepped groove structure, including a large-diameter groove section and a small-diameter groove section. The large-diameter groove section is located at one end of the receiving groove near the groove opening, and the locking member is provided on the large-diameter groove section.

[0011] Furthermore, the locking element includes a plurality of locking bolts, each of which is threaded onto the large-diameter groove section, with the front end of the locking bolt facing the receiving groove.

[0012] Furthermore, it also includes a visual recognition unit, which is disposed on the clamping and rotating mechanism.

[0013] Furthermore, the adjustment mechanism includes an X-axis moving unit, a Y-axis moving unit, and a Z-axis moving unit. The Y-axis moving unit is located at the output end of the X-axis moving unit, the Z-axis moving unit is located at the output end of the Y-axis moving unit, and the clamping and rotating mechanism is located on the Z-axis moving unit.

[0014] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art:

[0015] The automatic roll changing device provided by this utility model has a roll transfer shaft that can be fixed on a clamping and rotating mechanism. The roll to be replaced can be fixed on the roll transfer shaft. The clamping and rotating mechanism can also adjust its spatial position under the action of the adjusting mechanism to move the roll to the target position, so as to realize the automatic replacement of the roll, simplify the replacement process, and improve the efficiency of the transmission roll replacement. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the automatic roller changing device provided in Example 1;

[0018] Figure 2 This is a schematic diagram of the structure of the roll transfer shaft in the automatic roll changing device provided in Example 1;

[0019] Figure 3 This is a schematic diagram of the clamping and rotating mechanism in the automatic roller changing device provided in Example 1;

[0020] Figure 4 This is a schematic diagram of the structure of the clamping and rotating mechanism that clamps the roll transfer shaft in the automatic roll changing device provided in Example 1;

[0021] Figure 5 This is a schematic diagram of the transmission roller in the automatic roller changing device provided in Example 1;

[0022] Figure 6 This is a schematic diagram of the automatic positioning mechanism of the drive shaft in the automatic roller changing device provided in Example 1;

[0023] Figure 7 This is a schematic diagram of the inner roller structure of the machine frame;

[0024] Figure 8 This is a schematic diagram of the structure of the roll transfer shaft in the automatic roll changing device provided in Example 2;

[0025] Figure 9 This is a schematic diagram of the structure of the clamping and rotating mechanism that clamps the roll transfer shaft in the automatic roll changing device provided in Example 2;

[0026] Figure 10 This is a schematic diagram of the structure of the work roll in the automatic roll changing device provided in Example 2;

[0027] Figure 11 This is a schematic diagram of the automatic positioning mechanism for the work roll shaft in the automatic roll changing device provided in Example 2;

[0028] Figure 12 This is a schematic diagram of the roll ejection assembly in the automatic roll changing device provided in Example 2.

[0029] 1-Clamping and rotating mechanism; 11-Gripper; 111-Guide chuck; 112-Wedge-shaped gripper; 12-Clamping drive unit; 121-Busset; 122-Lead screw; 123-Lead screw nut; 124-Clamping motor; 125-Driven wheel; 13-Rotation drive unit; 131-Bearing seat; 132-Rotation motor; 133-Bearing; 134-Drive wheel; 2-Roller adapter shaft; 21-Connecting shaft section; 211-Accommodation groove; 212-Locking bolt; 213-Clamping plate; 214-Locking drive unit; 22-Internal shaft section; 221-First shaft section; 222-Second shaft section; 223-Third shaft section; 3-Adjusting mechanism; 31-X-axis moving unit; 32-Y-axis moving unit; 33 - Z-axis moving unit; 4-drive roller; 41-drive roller sprite head; 42-drive roller journal; 5-work roller; 6-vision recognition unit; 7-drive shaft automatic positioning mechanism; 71-upper drive shaft lifting unit; 72-lower drive shaft lifting unit; 73-upper drive shaft; 74-displacement sensor; 75-lower drive shaft; 76-drive shaft sprite hole; 8-roll ejection assembly; 81-upper left intermediate roller pusher; 82-upper right intermediate roller pusher; 83-upper right intermediate roller pusher; 84-lower right intermediate roller pusher; 85-lower work roller pusher; 86-lower left intermediate roller pusher; 87-hydraulic cylinder block; 9-work roller thrust bearing assembly; 91-lower work roller thrust bearing; 92-upper work roller thrust bearing. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. In the accompanying drawings, the dimensions and relative dimensions of certain parts may be enlarged for clarity.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connection" and "connected" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0032] In the description of this utility model, the terms "upper", "lower", "left", "right", "front", "back", "center", "horizontal", "vertical", "top", "bottom", "inner", and "outer" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of description and simplification of operation, 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, they should not be construed as limitations on this utility model.

[0033] Furthermore, in the description of this utility model, the terms "first" and "second" are used merely for descriptive distinction and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Additionally, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0034] Example 1

[0035] As per the instruction manual Figure 1 As shown, this utility model provides an automatic roll changing device for a multi-roll mill, including a roll transfer shaft 2 and a clamping and rotating mechanism 1. The roll transfer shaft 2 has a connecting shaft section 21 and an insert shaft section 22 connected to the clamping and rotating mechanism 1. The connecting shaft section 21 has a receiving groove 211 for inserting a roll, and a locking element is provided on the receiving groove 211. The clamping and rotating mechanism 1 is connected to an adjusting mechanism 3 for adjusting its spatial position. In this embodiment, the adjusting mechanism 3 can drive the clamping and rotating mechanism 1 and the roll transfer shaft 2 to move the roll to be replaced to the target position to complete the roll replacement.

[0036] In an optimized implementation, the clamping and rotating mechanism 1 includes a jaw 11, a clamping drive unit 12 for driving the jaw 11 to clamp or open, and a rotation drive unit 13 for driving the jaw 11 to rotate. The inner shaft section 22 of the roll adapter shaft 2 is inserted into the jaw 11 and clamps and engages with the jaw 11.

[0037] Specifically, the roller changing device is a roller changing robot, and the rollers include drive rollers, working rollers, intermediate rollers, etc. In this embodiment, the roller changing device is used to replace the drive roller, so the roller is the drive roller 4. The roller adapter shaft 2 is clamped in the gripper 11. When replacing the drive roller 4, the journal of the drive roller 4 is inserted into the receiving groove 211 of the roller adapter shaft 2 and fixed by the locking member. The gripper 11 can rotate under the action of the rotation drive unit 13 to adjust the position of the drive roller 4. At the same time, the clamping rotation mechanism 1 can adjust the spatial position of the drive roller under the action of the adjustment mechanism 3, so that the drive roller 4 can be moved to the target position, thereby realizing the replacement of the drive roller 4.

[0038] As per the instruction manual Figure 5The diagram shows the structure of the transmission roller 4. The transmission roller 4 has a transmission roller sprite head 41 and a transmission roller journal 42 at both ends. The transmission roller journal 42 has a stepped structure and can be inserted into and fixed within the roll adapter shaft 2, thereby enabling the movement and replacement of the transmission roller 4. The transmission roller sprite head 41 engages with the sprite hole of the transmission shaft, transmitting torque to the roller body.

[0039] Optimized implementation methods, as shown in the appendix to the instruction manual. Figure 2 The diagram shows the structure of the roll adapter shaft 2. The receiving groove 211 of the connecting shaft section 21 has a stepped groove structure, including a large-diameter groove section and a small-diameter groove section. The large-diameter groove section is located at the end of the receiving groove 211 near the groove opening. The structure of the receiving groove 211 is adapted to the transmission roller journal 42. The receiving groove 211 and the transmission roller journal 42 are clearance-fitted, which facilitates the insertion of the transmission roller journal 42 into the receiving groove 211. The locking bolt 212 is provided on the large-diameter groove section. The locking bolt 212 is threaded onto the large-diameter groove section with its front end facing the receiving groove 211. After the transmission roller journal 42 is inserted into the receiving groove 211, the locking bolt 212 is screwed in to fix the transmission roller 4 onto the roll adapter shaft 2. The transmission roller journal 42 can abut against the groove wall of the receiving groove 211 and is fixed by the locking bolt 212, which has good connection reliability and improves the safety of the transmission roller 4 during the transfer process.

[0040] In an optimized implementation, there are multiple roll adapter shafts 2, and the size of the receiving groove 211 of each roll adapter shaft 2 is different to accommodate different types of transmission rollers 4. The gripper 11 of the clamping and rotating mechanism 1 is selectively connected to one of the roll adapter shafts 2 to meet the replacement of different types of transmission rollers 4.

[0041] In an optimized implementation, the inner insertion shaft section 22 of the roll adapter shaft 2 includes a first shaft section 221, a second shaft section 222, and a third shaft section 223 arranged sequentially. The first shaft section 221 is located at the end of the inner insertion shaft section 22 near the connecting shaft section 21. The first shaft section 221 and the third shaft section 223 are cylindrical shaft sections, and the second shaft section 222 is a tapered shaft section. The clamping surface of the gripper 11 is provided with a first gripper section adapted to the first shaft section 221, a second gripper section adapted to the second shaft section 222, and a third gripper section adapted to the third shaft section 223. When the gripper 11 clamps the roll adapter shaft 2, the inner wall of the first gripper section is completely fitted with the outer wall of the first shaft section 221, the inner wall of the second gripper section is completely fitted with the outer wall of the second shaft section 222, and the inner wall of the third gripper section is completely fitted with the outer wall of the third shaft section 223, thereby achieving the clamping of the roll adapter shaft 2. The inner shaft section 22 adopts a three-section structure, and the clamping surface of the gripper 11 is adapted to this three-section structure, enhancing the overall rigidity of the connection between the two. The middle section of the inner shaft section 22 is a tapered shaft section. When the gripper 11 closes and clamps, the tapered surface guides the shaft section to automatically move to the center position of the gripper 11, achieving self-correction and ensuring that the axis of the roll adapter shaft 2 is highly aligned with the axis of the clamping rotation mechanism 1. At the same time, the tapered fit can eliminate radial clearance and improve the clamping reliability of the gripper. The three-section structure of the inner shaft section 22 can form a longer, continuously varying contact surface. The tapered shaft section can convert the axial clamping force into a radial clamping force, making the stress distribution more uniform and avoiding stress concentration at a single position. The inner shaft section 22 has a large contact area, uniform stress distribution, and no gaps, which can transmit greater torque and is less prone to slippage or loosening when subjected to torque or vibration.

[0042] In an optimized implementation, the diameter of the first shaft segment 221 is D, the diameter of the third shaft segment 223 is d, the taper of the second shaft segment 222 is α, the diameter D of the first shaft segment 221 is greater than the diameter d of the third shaft segment 223, and the diameter d of the third shaft segment 223 is greater than the diameter of the smallest end of the tapered shaft segment 222. Along the direction from the first shaft segment 221 to the third shaft segment 223, the diameter of the second shaft segment 222 gradually decreases. The diameter of the largest end of the second shaft segment 222 is the same as the diameter of the first shaft segment 221, and the diameter of the third shaft segment 223 is greater than the diameter of the smallest end of the second shaft segment 222. When the gripper 11 clamps the roll adapter shaft 2, the clamping surface of the gripper 11 is in contact with the outer wall of the inner shaft segment 22. The inner diameter of the first gripper segment is equal to the diameter of the first shaft segment 221, the taper of the second gripper segment is the same as the taper of the second shaft segment 222, and the diameter of the third gripper segment is equal to the diameter of the third shaft segment 223. The diameter of the third gripper segment is greater than the diameter of the smallest end of the second gripper segment. Therefore, when the roll adapter shaft 2 is clamped by the gripper 11, it cannot move axially, thus achieving axial and radial clamping.

[0043] The optimized implementation also includes a vision recognition unit 6, which is mounted on the clamping drive unit 12. This vision recognition unit uses vision technology to accurately calculate the center of the transmission roller, compares it with the center of the roller issued by the PLC, and provides a correction amount for precise positioning of the roller center. The roller center data obtained by the vision recognition unit can be fed back to the adjustment mechanism, which drives the roller adapter shaft to move to the target position.

[0044] Optimized implementation methods, as shown in the appendix to the instruction manual. Figure 3 and 4 The diagram shows a schematic of the clamping and rotating mechanism 1. The gripper 11 includes a guide chuck 111 and a plurality of wedge-shaped grippers 112, each of which is circumferentially arranged on the guide chuck 111. Preferably, there are four wedge-shaped grippers 112 arranged circumferentially on the guide chuck 111. The clamping drive unit 12 includes a bushing 121 and a clamping drive assembly. The bushing 121 is a hollow bushing with a wedge-shaped inner cavity at one end. The outer wall of each wedge-shaped gripper 112 is wedge-shaped and adapted to the wedge-shaped inner cavity. A limiting boss is provided at one end of the wedge-shaped inner cavity. The guide chuck has a shoulder that axially limits the movement of the limiting boss. The guide chuck 111 is partially movably disposed within the wedge-shaped inner cavity. The shoulder of the guide chuck 111 engages with the limiting boss in an axial limiting manner, restricting the axial movement path of the guide chuck 111. The guide chuck 111 is slidably connected to the bushing 121 and connected to the output end of the clamping drive assembly. Under the action of the clamping drive assembly, the guide chuck 111 can move linearly along the axial direction of the bushing 121, thereby causing the wedge-shaped gripper 112 to move within the wedge-shaped inner cavity. Through the engagement of the wedge-shaped outer wall of the wedge-shaped gripper 112 with the wedge-shaped inner cavity, the wedge-shaped gripper 112 moves both axially and radially, achieving the clamping and opening of the gripper 11. The axial movement of the guide chuck 111 within the bushing 121 ensures the guide chuck's movement path and guarantees smooth operation of the gripper.

[0045] In an optimized implementation, the clamping drive assembly includes a lead screw 122, a lead screw nut 123, and a clamping motor 124. Both the lead screw 122 and the lead screw nut 123 are housed within the bushing 121. The clamping motor 124 is mounted on the bushing 121. The lead screw nut 123 is connected to the output end of the clamping motor 124. The lead screw 122 is threadedly connected to the lead screw nut 123. The end of the lead screw 122 away from the lead screw nut 123 is connected to the guide chuck 111. The clamping motor 124 drives the lead screw nut 123 to rotate, thereby causing the lead screw 122 to move axially. The lead screw 122 and the wedge-shaped gripper 112 are linked on the guide chuck 111. The lead screw 122 can be connected to the guide chuck 111 via a bearing. The forward and backward movement of the lead screw 122 drives the guide chuck 111 and the wedge-shaped gripper 112 to move axially within the bushing, thus achieving the clamping and opening actions of the gripper 11.

[0046] In an optimized implementation, the rotation drive unit 13 includes a bearing housing 131 and a rotation motor 132. The bearing housing 131 is sleeved on the outside of the bushing 121 and connected to the bushing 121 via a bearing 133. The rotation motor 132 is mounted on the bearing housing 131 and is drively connected to the bushing 121. Specifically, a driven wheel 125 is provided at the end of the bushing 121 away from the wedge-shaped inner cavity. The output end of the rotation motor 132 is connected to a driving wheel 134. The driven wheel 125 meshes with the driving wheel 134. The rotation motor 132 drives the driving wheel 134 to rotate, which in turn drives the driven wheel 125 to rotate. The bushing 121 and the roll transfer shaft 2 rotate together with the driven wheel 125. When the transmission roller 4 is fixed on the roll transfer shaft 2, it can rotate together, thereby realizing the rotation of the transmission roller 4. The position of the transmission roller 4 can be adjusted during the docking process, improving the replacement accuracy and efficiency of the transmission roller 4.

[0047] In an optimized implementation, the adjustment mechanism 3 is an XYZ movement mechanism used to drive the clamping rotation mechanism to move along the X, Y, and Z axes to adjust the position of the transmission roller. The adjustment mechanism 3 includes an X-axis movement unit 31, a Y-axis movement unit 32, and a Z-axis movement unit 33. The Y-axis is the running direction of the strip, the X-axis is perpendicular to the Y-axis, the X-axis is the center line of the frame, and the Z-axis is vertical. The X-axis movement unit includes a traveling wheel and a servo motor that drives the traveling wheel to move along the X-axis. The Y-axis movement unit is located at the output end of the X-axis movement unit and includes a Y-axis slide rail arranged along the Y-axis and a servo motor that drives the Y-axis slider to move along the Y-axis slide rail. The Z-axis movement unit is located on the Y-axis slider and includes a Z-axis slide rail arranged along the Z-axis and a servo motor that drives the Z-axis slider to move along the Z-axis slide rail. The bearing seat 131 of the clamping rotation mechanism 1 is located on the Z-axis slider. The clamping and rotating mechanism 1 can move in the XYZ axis direction under the action of the adjusting mechanism 3, thereby adjusting the position of the transmission roller to realize the replacement of the transmission roller.

[0048] As per the instruction manual Figure 6 As shown, this is the automatic positioning mechanism 7 for the drive shaft, used to connect the drive roller 4 and drive the drive roller 4 to rotate; as per the attached instruction manual. Figure 7 The diagram shows a schematic of the inner roller shafts of the machine frame, including a drive shaft a, a working roller b, and an intermediate roller c. Specifically, drive shaft a includes an upper left drive shaft a1, an upper right drive shaft a2, a lower left drive shaft a3, and a lower right rotating shaft a4. Working roller b includes an upper working roller b1 and a lower working roller b2. Intermediate roller c includes an upper left intermediate roller c1, an upper right intermediate roller c2, a lower left intermediate roller c3, and a lower right intermediate roller c4. The automatic positioning mechanism 7 of the drive shaft includes an upper drive shaft lifting unit 71 and a lower drive shaft lifting unit 72. The upper drive shaft lifting unit 71 is driven by a hydraulic cylinder to move the upper drive shaft 73 up and down via a C-shaped hook. The hydraulic cylinder is equipped with a displacement sensor 74, which can position the upper drive shaft at its lifting and lowering positions. The lower drive shaft lifting unit 72 is driven by a hydraulic cylinder to move the lower drive shaft 75 up and down via a V-shaped block. The hydraulic cylinder is equipped with a displacement sensor 74, which can position the lower drive shaft 75 at its lifting and lowering positions. The upper drive shaft 73 and the lower drive shaft 75 are provided with drive shaft lenticular holes 76 for inserting drive roller lenticular heads 41 of the drive roller.

[0049] As one specific implementation, to facilitate the control of the roller changing device, a PLC controller is also included. The clamping motor, the rotating motor, and each servo motor in the adjusting mechanism are electrically connected to the PLC controller, and the roller changing device can be controlled by the PLC controller.

[0050] As one specific implementation, the upper drive shaft lifting unit 71, the lower drive shaft lifting unit 72, and the displacement sensor 74 are electrically connected to the PLC controller.

[0051] The working process of the automatic roller changing device for the drive roller in this application is as follows:

[0052] Roll changing process: The roll changing device receives a drive roll changing command from the PLC. Taking the upper left drive roll as an example, based on the position of the upper left drive roll within the mill stand, the adjusting mechanism 3 moves simultaneously in both the Z and Y directions to align the center of the roll transfer shaft 2 with the center coordinates of the upper left drive roll within the mill stand. The vision recognition unit 6 visually identifies the actual roll position and provides the deviation. The adjusting mechanism 3 performs fine adjustments in both the Z and Y directions. The roll changing device moves towards the mill along the X direction, using torque control during movement. If the set torque is reached, the roll changing device stops moving and is inspected. The X-axis movement distance determines whether the axial position of the drive roll neck has been reached. If the axial position of the drive roll neck has not been reached, the roll changing device pauses and awaits manual confirmation. If the axial position of the drive roll neck has been reached, the roll transfer shaft 2 fixes the drive roll neck, the roll changing device moves along the X-axis away from the mill to the roll stand position, the roll stand is in place, the roll changing device moves along the Y-axis to the position of the roll on the roll stand, moves downward along the Z-axis to place the roll on the roll stand, the locking bolt of the roll transfer shaft 2 is loosened, the roll changing device moves backward along the X-axis, and at the same time, the Y and Z axes are reset.

[0053] Roll loading process: The roll stand trolley moves to the front of the rolling mill. The roll changing device, based on the PLC's instruction to change the drive roll, taking the upper left drive roll as an example, moves along the Z and Y directions to the roll position on the roll stand trolley. The roll transfer shaft 2 clamps the drive roll, and the Z-axis moves upward 200mm to disengage the roll from the roll stand trolley, which then resets. Based on the position of the upper left drive roll within the rolling mill stand, the device moves simultaneously in both the Z and Y directions, aligning the rotation coordinates of the drive roll center and the upper left drive roll within the stand. The upper left drive roll suspension hydraulic cylinder drives the C-hook and drive shaft upwards together. Based on feedback from displacement sensor 74, the center of the drive shaft is aligned within the upper left drive roll within the stand. The roll changing device moves towards the rolling mill along the X direction, using torque control during movement. If the set torque is reached, the roll changing device stops. The movement is checked to determine if the roller axial direction is properly installed. If it is, it indicates that the drive roller's sprite head has engaged with the drive shaft's sprite hole. Then, the roller adapter shaft 2 is released, and the roller changing device is reset. If it is not properly installed, the rotation drive unit 13 is started to rotate the drive roller 4 by a small angle, and the frame is moved again in the x direction. If the design torque is reached, the x-direction movement is checked again to determine if the drive roller axial direction is properly installed. This process is repeated until the drive roller's sprite head engages with the drive shaft's sprite hole. Then, the roller adapter shaft 2 is released, the roller changing device is reset, and the roller changing is completed.

[0054] Example 2

[0055] This utility model also provides an automatic roll changing device for a multi-roll mill. This device is mainly used for changing the work roll 5 and includes a clamping and rotating mechanism 1 and a roll transfer shaft 2. The clamping and rotating mechanism 1 is connected to an adjusting mechanism 3 for adjusting its spatial position. The clamping and rotating mechanism 1 and the adjusting mechanism 3 are the same as in Embodiment 1 and will not be described again here. The roll transfer shaft 2 has a connecting shaft section 21 and an inner insertion shaft section 22 inserted into the clamping jaw 11. The connecting shaft section 21 has a receiving groove 211 for inserting the roll, and a locking element is provided on the receiving groove 211. The structure of the inner insertion shaft section 22 is the same as in Embodiment 1 and will not be described again here.

[0056] As per the instruction manual Figure 10 The diagram shows the structure of the work roll 5. The diameter of the work roll 5 is D1, and the end of the roll is a stepped shaft, forming a concave journal structure.

[0057] As per the instruction manual Figure 8 The diagram shows the structure of the roll adapter shaft 2, where (a) is the front view and (b) is the side view, used to fix the work roll 5. (See attached instruction manual.) Figure 9 This is a schematic diagram of the clamping and rotating mechanism clamping the roll adapter shaft. The connecting shaft section 21 is provided with a receiving groove 211, which is a lower clamping groove structure. The upper end of the receiving groove is open, and the lower clamping groove is composed of two rounded ends, which can accommodate work rolls of different diameters. The locking member is located above the receiving groove 211. The locking member includes a clamping plate 213, which is located directly above the receiving groove 211. The clamping plate 213 is connected to a locking drive unit 214 for driving it to move closer to or away from the receiving groove 211. By moving the clamping plate 213, the work roll 5 can be locked and unlocked on the roll adapter shaft 2.

[0058] In an optimized implementation, the snap-fit ​​surface of the snap-fit ​​plate 213 has a stepped structure, which is adapted to the stepped shaft at the end of the work roll 5, and is used for positioning and fixing the work roll 5 on the roll transfer shaft 2.

[0059] As per the instruction manual Figure 11 and 12 The diagram shows a schematic of the work roll axial positioning mechanism, including a roll ejection assembly 8 and a work roll thrust assembly 9. Figure 12(a) is the front view, and (b) is the side view. The roll ejection assembly 8 is fixed on the rear door and consists of a hydraulic cylinder block 87 and a pusher head. The hydraulic cylinder block 87 includes four hydraulic cylinders: an upper intermediate roll ejection hydraulic cylinder, an upper work roll ejection hydraulic cylinder, a lower work roll ejection hydraulic cylinder, and a lower intermediate roll ejection hydraulic cylinder, all integrated into one hydraulic cylinder block. The pusher head consists of an upper left intermediate roll pusher head 81, an upper right intermediate roll pusher head 83, an upper work roll pusher head 82, a lower left intermediate roll pusher head 86, a lower work roll pusher head 85, and a lower right intermediate roll pusher head 84. The upper left and upper right intermediate roll pushers are connected to the upper intermediate roll ejection hydraulic cylinder, and the lower left and lower right intermediate roll pushers are connected to the lower intermediate roll ejection hydraulic cylinder. The work roll thrust bearing assembly 9 is fixed on the rear door and has an upper work roll thrust bearing 92 and a lower work roll thrust bearing 91 installed on it, which serve as the axial positioning function for work roll changing.

[0060] The working process of the automatic work roll changing device in this application is as follows:

[0061] The roll removal process is as follows: The roll changing device detects whether the roll transfer shaft 2 is inside the clamping and rotating mechanism 1 according to the PLC's instruction to change the working roll. If not, it moves to the position of the roll transfer shaft 2 on the roll stand car, and the clamping and rotating mechanism 1 clamps the roll transfer shaft 2. At the same time, the roll gap inside the frame opens, and the hydraulic cylinder of the intermediate roll push-out drives the push head and the intermediate roll to move to the middle position, so that the center of the intermediate roll is aligned with the center of the frame. The front door is opened, and the upper working roll push-out hydraulic extension is opened, so that the upper working roll is pushed out part of the way, and the preparation work is completed.

[0062] Taking the above work roll as an example, based on the position of the upper work roll within the mill stand, the roll changing device moves simultaneously in both the Z and Y directions, aligning the center of the roll transfer shaft 2 with the center coordinates within the upper work roll stand. The vision recognition unit 6 visually identifies the actual roll position and provides the deviation. The roll changing device makes fine adjustments in both the Z and Y directions, and moves towards the mill along the X direction. Torque control is used during the movement. If the set torque is reached, the roll changing device stops moving and checks the X-direction movement distance to determine if it has reached the axial position of the roll neck. If it has not reached the axial position of the roll neck, the roll changing device pauses and awaits manual confirmation. If it has reached the axial position of the roll neck, the work roll clamping plate on the roll transfer shaft 2 clamps, and the roll changing device moves away from the mill along the X direction to the roll stand position. Once the roll stand is in place, the roll changing device moves in the Y direction to the position of the roll on the roll stand, moves downwards in the Z direction to place the roll onto the roll stand, the work roll clamping plate releases the shaft neck, and the roll changing device moves backwards in the X direction while simultaneously resetting in the Y and Z directions.

[0063] The roll loading process is as follows: The roll trolley moves to the front of the rolling mill. The roll changing device, based on the PLC's instruction to change the work roll (taking the upper roll as an example), moves along the Z and Y directions to the position of the work roll on the roll trolley. The work roll clamping plate on the roll transfer shaft 2 clamps the work roll. The Z-axis moves upward 200mm to disengage the work roll from the roll trolley, and the roll trolley resets. Based on the PLC's instruction regarding the position of the upper work roll within the frame, the device moves simultaneously in both the Z and Y directions to align the work roll center clamped by the roll changing device with the position coordinates within the frame. The roll changing device moves towards the rolling mill along the X direction, using torque control during movement. If the set torque is reached, the roll changing device stops moving and checks the X-axis movement distance to determine if the roll is axially installed correctly. If it is in place, the roll transfer shaft 2 is released, the roll changing device resets, and the roll changing process ends.

[0064] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0065] Those skilled in the art will understand that this invention can be implemented in many other specific forms without departing from the spirit and scope of this invention. Although embodiments of this invention have been described, it should be understood that this invention is not limited to these embodiments, and those skilled in the art can make changes and modifications within the spirit and scope of this invention as defined in the appended claims.

Claims

1. An automatic roll changing device for a multi-roll mill, characterized in that, The device includes a roll adapter shaft and a clamping and rotating mechanism. The roll adapter shaft has a connecting shaft section and an insert shaft section connected to the clamping and rotating mechanism. The connecting shaft section has a receiving groove for inserting a roll. The receiving groove is provided with a locking element. The clamping and rotating mechanism is connected to an adjustment mechanism for adjusting its spatial position.

2. The automatic roll changing device for a multi-roll mill according to claim 1, characterized in that, The clamping and rotating mechanism includes a jaw, a clamping drive unit for driving the jaw to clamp or open, and a rotation drive unit for driving the jaw to rotate. The roll adapter shaft is engaged with the jaw for clamping.

3. The automatic roll changing device for a multi-roll mill according to claim 2, characterized in that, The gripper includes a guide chuck and multiple wedge-shaped grippers, each of which is arranged circumferentially on the guide chuck. The clamping drive unit includes a bushing and a clamping drive assembly. The bushing has a wedge-shaped inner cavity. The guide chuck portion and the wedge-shaped grippers are movably disposed within the wedge-shaped inner cavity. The guide chuck is connected to the output end of the clamping drive assembly.

4. The automatic roll changing device for a multi-roll mill according to claim 3, characterized in that, One end of the wedge-shaped inner cavity is provided with a limiting boss, and the guide chuck is provided with a shoulder that axially limits and cooperates with the limiting boss.

5. The automatic roll changing device for a multi-roll mill according to claim 3, characterized in that, The clamping drive assembly includes a lead screw, a lead screw nut, and a clamping motor. The lead screw and the lead screw nut are both located inside the bushing. The clamping motor is mounted on the bushing. The lead screw nut is connected to the output end of the clamping motor. The lead screw and the lead screw nut are threadedly connected. The end of the lead screw away from the lead screw nut is connected to the guide chuck.

6. The automatic roll changing device for a multi-roll mill according to claim 3, characterized in that, The rotation drive unit includes a bearing housing and a rotation motor. The bearing housing is sleeved on the outside of the bushing and connected to the bushing via a bearing. The rotation motor is mounted on the bearing housing and is connected to the bushing via a drive mechanism.

7. The automatic roll changing device for a multi-roll mill according to claim 1, characterized in that, The receiving groove of the connecting shaft section is a stepped groove structure, including a large-diameter groove section and a small-diameter groove section. The large-diameter groove section is located at one end of the receiving groove near the groove opening, and the locking member is provided on the large-diameter groove section.

8. The automatic roll changing device for a multi-roll mill according to claim 7, characterized in that, The locking component includes a plurality of locking bolts, each of which is threaded onto the large-diameter groove section, with the front end of the locking bolt facing the receiving groove.

9. The automatic roll changing device for a multi-roll mill according to claim 1, characterized in that, It also includes a visual recognition unit, which is disposed on the clamping and rotating mechanism.

10. The automatic roll changing device for a multi-roll mill according to claim 1, characterized in that, The adjustment mechanism includes an X-axis moving unit, a Y-axis moving unit, and a Z-axis moving unit. The Y-axis moving unit is located at the output end of the X-axis moving unit, the Z-axis moving unit is located at the output end of the Y-axis moving unit, and the clamping and rotating mechanism is located on the Z-axis moving unit.

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