A coil centering device for cold rolling mill

Abstract

The utility model discloses a coil centering device for coiling a cold rolling mill, belonging to the field of aluminum processing technology, which includes a coiling car that performs linear reciprocating motion between an uncoiling machine and a storage and transportation roller and a control device electrically connected to the coiling car, a first laser rangefinder is provided on the uncoiling machine, and a second laser rangefinder is provided on the storage and transportation roller. The utility model installs the first laser rangefinder and the second laser rangefinder on the uncoiling machine and the storage and transportation roller respectively, so that the monitoring direction is parallel to the running direction of the coiling car, calculates the actual width of the coil by combining with the control device, and controls the coiling car to stop automatically at a suitable position, so that the coil automatically centers on the core shaft, solves the problem that the coil cannot automatically center on the core shaft, and does not need to add a bracket to install the monitoring structure, reducing the installation cost and the occupied area.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum processing, in particular to a material coil centering device when a cold rolling machine is coiled. Background Art

[0002] The existing coiling car for cold rolling mill has the functions of automatic coiling and automatic height alignment of coils. The coils are hoisted to the storage roller tray by the overhead crane, and then the coiling car transports the coils to the automatic height alignment position for coil height centering. After the height centering is completed, the coiling car transports the coils to the mandrel of the unwinder, and the coiling is completed. The coiling car moves forward to the position and stops according to the actual position of the coiling car. However, since the coils are manually placed on the tray, this method cannot guarantee that the coils can be in the center of the mandrel after each coiling.

[0003] Prior art CN 115583526 A proposes an automatic coiling device, which includes a coil trolley and a PLC, and also includes a laser distance measuring device located beside the core shaft; the coil trolley places the coil horizontally with a liftable saddle and controls the vertical position of the coil; the travel path of the coil trolley, the core shaft, and the center axis of the coil are parallel to each other and located in the same vertical working plane; a photoelectric beam switch group is provided at the travel path of the coil trolley; the PLC detects the coil specifications through the photoelectric beam switch group and the laser distance measuring device, measures the distance between the coil trolley and the core shaft through the laser distance measuring device, and controls the coil trolley to automatically insert the coil to the core shaft. Among them, the photoelectric beam switch group includes a first photoelectric beam switch located at the starting point of the travel path of the coil trolley, and also includes a second photoelectric beam switch located at the travel path of the coil trolley. The actual width of the coil can be calculated by sensing the front and rear ends of the coil by the second photoelectric beam switch.

[0004] It can be seen that the horizontal centering control of the automatic coiling device is mainly based on the sensing of the laser distance measuring device and the second photoelectric switch. However, since the sensing direction of the second photoelectric switch is perpendicular to the travel direction of the coil trolley, it is necessary to set brackets on the left and right sides of the coil trolley's travel track to install the second photoelectric switch. On the one hand, it increases the installation and maintenance costs, and on the other hand, the brackets are extended outward, increasing the occupied area, which is easy to cause inconvenience to the site and operators. To this end, the utility model proposes a coil centering device for coiling a cold rolling mill, which adopts a centering control method and structure different from the prior art to avoid the above defects. Utility Model Content

[0005] The utility model proposes a coil centering device for coiling a cold rolling mill, wherein a first laser rangefinder and a second laser rangefinder are respectively installed on an uncoiler and a storage and transportation roller, so that a monitoring direction is parallel to a running direction of a coil loading vehicle, and an actual width of the coil is calculated by combining a control device, and the coil loading vehicle is controlled to automatically stop at a suitable position, so that the coil is automatically centered on a core shaft, thereby solving the problem that the coil cannot be automatically centered on a core shaft, and there is no need to add a bracket to install a monitoring structure, thereby reducing installation costs and occupied area.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is:

[0007] A coil centering device for coiling a cold rolling mill, comprising a coiling car that performs linear reciprocating motion between an uncoiler and a storage and transportation roller and a control device electrically connected to the coiling car, the uncoiler is provided with a first laser rangefinder, the storage and transportation roller is provided with a second laser rangefinder, the measuring directions of the first laser rangefinder and the second laser rangefinder are parallel to the running direction of the coiling car, and when the coil completes automatic height alignment, the first laser rangefinder and the second laser rangefinder are respectively arranged opposite to the front end face and the rear end face of the coil; the first laser rangefinder and the second laser rangefinder are both electrically connected to the control device.

[0008] Furthermore, the storage and transportation roller includes two conveying structures symmetrically arranged on the left and right and a number of pallets movably arranged on the two conveying structures; the conveying structure includes a support frame and a number of conveying wheels arranged on the support frame and arranged in a line, the number of conveying wheels are transmission-connected to the conveying motor, and the conveying motor is electrically connected to the control device; the pallet is a square tray with a material roll placed inside, and tracks are arranged on the left and right sides of the bottom surface of the pallet, and the two tracks are movably mounted on the conveying wheels of the two conveying structures respectively.

[0009] Furthermore, two limiting rollers are arranged in the tray, and the two limiting rollers are arranged symmetrically on the left and right.

[0010] Furthermore, the winding vehicle includes a vehicle body, a wheel group and a driving motor for driving the wheel group are arranged at the bottom of the vehicle body, a lifting rod is vertically arranged on the top surface of the vehicle body, a support seat is horizontally arranged on the top of the lifting rod, and the width of the support seat is smaller than the spacing between the two conveying structures, and the driving motor and the lifting rod are both electrically connected to the control device.

[0011] Furthermore, the control device is connected to the drive motor via a frequency converter, the drive motor is equipped with an encoder, and the encoder is electrically connected to the control device.

[0012] As a preferred embodiment, a coil centering device for a cold rolling mill also includes a pallet recovery roller, and the pallet recovery roller is located directly below the storage and transportation roller, and its structure is the same as that of the storage and transportation roller.

[0013] Furthermore, the front end of the pallet recovery roller is arranged rearwardly compared to the front end of the storage and transportation roller.

[0014] Furthermore, the pallet recovery roller is provided with a sensor for sensing the position of the upper coiling vehicle, and the sensor is electrically connected to the control device.

[0015] Furthermore, the sensor is an infrared sensor, and the control device is a PLC.

[0016] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0017] 1. The utility model can measure the actual width of the material coil, and calculate the centerline position of the material coil and the centerline position value of the unwinder mandrel through the laser rangefinder and PLC. No matter how wide the material coil is, it can ensure that the material coil can be in the centerline position of the mandrel every time it is rolled up, which can effectively avoid the problem that the centerline position of the material coil is inconsistent with the centerline position of the unwinder mandrel due to different widths of the material coil and the different centerlines of the width of the material coil when the material coil is placed on the pallet.

[0018] 2. The utility model installs the first laser rangefinder and the second laser rangefinder on the uncoiler and the storage and transportation roller respectively, so that the monitoring direction is parallel to the running direction of the coiler. There is no need to add a bracket to install the monitoring structure, which reduces the inconvenience caused by the extension of the bracket, as well as the installation cost and the occupied area.

[0019] 3. The utility model is also provided with a pallet recovery roller, which realizes automatic recovery of pallets by cooperating with the upper roll car and the pallet recovery roller. No manual participation in the recovery is required, and no robot arm needs to be installed, which is conducive to further reducing equipment costs and reducing equipment footprint. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of a coil centering device for a cold rolling mill proposed in Example 1 of the utility model;

[0021] Figure 2 This is a schematic diagram of the connection between the pallet and the storage and transportation roller conveyor proposed in Example 1 of the utility model;

[0022] Figure 3 This is a schematic structural diagram of the coil loading vehicle proposed in Embodiment 1 of the present invention when transporting a coil;

[0023] Figure 4 This is a schematic diagram of the coordination between the coil loading vehicle and the storage and transportation roller table proposed in Example 1 of the utility model;

[0024] Figure 5 This is a schematic diagram of the coordination between the roll-up vehicle and the pallet recovery roller table proposed in Example 2 of the utility model;

[0025] Among them, the markings in the attached drawings are: 1-unwinder, 2-storage and transportation roller, 3-first laser rangefinder, 4-second laser rangefinder, 5-coiler, 6-material coil, 7-support frame, 8-transmission wheel, 9-pallet, 10-limiting roller, 11-car body, 12-wheel set, 13-lifting rod, 14-support seat, 15-pallet recovery roller, 16-sensor, 17-core shaft. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Example 1

[0028] like Figure 1-4 As shown, a coil centering device for coiling a cold rolling mill includes a coiling car 5 that performs linear reciprocating motion between an uncoiler 1 and a storage roller table 2 and a control device (not shown in the figure) that is electrically connected to the coiling car 5.

[0029] The uncoiler 1 is provided with a first laser rangefinder 3, and the storage and transportation roller 2 is provided with a second laser rangefinder 4. The measuring directions of the first laser rangefinder 3 and the second laser rangefinder 4 are parallel to the running direction of the coiler 5, and when the material coil 6 completes the automatic height alignment, the first laser rangefinder 3 and the second laser rangefinder 4 are respectively arranged opposite to the front end face and the rear end face of the material coil 6. The first laser rangefinder 3 and the second laser rangefinder 4 are both electrically connected to the control device. The control device is mainly responsible for controlling the operation of the coiler 5. It calculates the width of the material coil 6 and the position to which the coiler 5 is to move through the data measured by the two laser rangefinders to control the operation of the coiler 5.

[0030] The storage and transportation roller 2 includes two conveying structures symmetrically arranged on the left and right and a plurality of trays 9 movably arranged on the two conveying structures. The conveying structure includes a support frame 7 and a plurality of conveying wheels 8 arranged on the support frame 7 and arranged in a line. The plurality of conveying wheels 8 are connected to a conveying motor (not shown in the figure) by transmission. The conveying motor is electrically connected to a control device. The conveying motor rotates to drive the plurality of conveying wheels 8 to move synchronously.

[0031] The storage and transportation roller 2 is mainly used to store the coils 6 to be rolled. The cold rolling mill involved in this scheme is a 1500mm irreversible cold rolling mill. Therefore, in order to improve the production efficiency of the cold rolling mill, the cold rolling mill is equipped with a storage and transportation roller 2. The storage and transportation roller 2 can store multiple coils of coils 6 to be rolled. When the cold rolling mill is in production, the next coil 6 to be rolled can be transported to the coiling position through the storage and transportation roller 2, and transported to the automatic height alignment position by the coiling car 5 to complete the automatic height alignment and wait for the coiling to be rolled, which can greatly improve the production efficiency of the cold rolling mill.

[0032] The tray 9 is a square tray, in which the material coil 6 is placed. Tracks are arranged on the left and right sides of the bottom surface of the tray 9, and the two tracks are movably mounted on the conveying wheels 8 of the two conveying structures. Two limiting rollers 10 are arranged in the tray 9, and the two limiting rollers 10 are arranged symmetrically on the left and right to limit the material coil 6 to prevent the material coil 6 from moving relative to the tray 9 when it is transferred with the coiling car 5. The tray 9 is mainly used to place the material coil 6. The storage and transportation roller 2 realizes the transportation of the material coil 6 by transporting the tray 9. Similarly, the coiling car 5 also realizes the coiling of the material coil 6 by lifting the tray 9. It is an important auxiliary tool for coiling and unloading the cold rolling mill.

[0033] The upper winding vehicle 5 includes a vehicle body 11, a wheel set 12 and a driving motor (not shown in the figure) for driving the wheel set 12 are arranged at the bottom of the vehicle body 11, a lifting rod 13 is vertically arranged on the top surface of the vehicle body 11, a bracket 14 is horizontally arranged on the top of the lifting rod 13, the width of the bracket 14 is less than the spacing between the two transmission structures, and the driving motor and the lifting rod 13 are both electrically connected to the control device. The control device is connected to the driving motor through a frequency converter (not shown in the figure), and the driving motor is installed with an encoder (not shown in the figure), and the encoder is electrically connected to the control device. In this embodiment, the control device is a PLC.

[0034] The coil-up trolley 5 is responsible for transporting the material coil 6 to the uncoiler core shaft 17. The movement of the coil-up trolley 5 is mainly controlled by a drive motor and a frequency converter. The use of a frequency converter can realize multi-speed movement of the coil-up trolley 5. The drive motor of the coil-up trolley 5 is equipped with an encoder, and the real-time position of the coil-up trolley 5 is calculated by the encoder. When the coil-up trolley 5 moves to the coiling position and the position of the uncoiler core shaft 17, the speed slows down to ensure the safety of coiling. High gear is used in other positions to improve the coiling efficiency.

[0035] The operating steps of the utility model are as follows:

[0036] Step 1: The production worker uses an overhead crane to lift the material roll 6 and place it on the pallet 9 on the storage and transportation roller 2;

[0037] Step 2: The storage and transportation roller 2 transports the tray 9 to the roll-up position;

[0038] Step 3: The coiling vehicle 5 moves to the lower part of the coiling position of the storage and transportation roller conveyor 2;

[0039] Step 4: The support base 14 of the coil loading vehicle 5 is raised to lift the tray 9 and the coil 6;

[0040] Step 5: After the tray 9 and the coil 6 are lifted into place, the coil loading vehicle 5 moves to the automatic height alignment position to align the height of the coil 6. Through the lifting and lowering action of the coil loading vehicle 5, the center axis of the coil 6 and the mandrel 17 of the unwinding machine are located at the same center line position;

[0041] Step 6: After the automatic height alignment is completed, the two laser rangefinders can measure the cross-sectional distances from the rangefinders to both sides of the material roll 6. The second laser rangefinder 4 measures the distance L1 between the material roll 6, and the first laser rangefinder 3 measures the distance L2 between the material roll 6. The data measured by the two laser rangefinders are transmitted to the PLC, and the actual width K of the material roll 6 is calculated with the distance L between the two rangefinders written in advance in the PLC. The calculation formula is: K = L-L1-L2. The distance between the first laser rangefinder 3 and the centerline position of the unwinding machine mandrel 17 is X1, and the centerline of the width of the material roll 6 is K / 2. Then, when the centerline of the material roll is consistent with the centerline of the mandrel, the distance between the material roll 6 and the first laser rangefinder 3 is X = X1-K / 2.

[0042] Step 7: The coiling car 5 starts to move toward the uncoiler core shaft 17, and the first laser rangefinder 3 measures the real-time position value X2 of the material coil 6. X2 is transmitted to the PLC in real time. When X2=X, the PLC controls the coiling car 5 to stop. At this time, the center line of the width of the material coil 6 is consistent with the center line of the uncoiler core shaft 17, the support seat 14 descends, the coiling car 5 withdraws, the uncoiler core shaft 17 rises, and the coiling is completed.

[0043] The calculation formula and data involved in this scheme are as follows:

[0044] X1: X1 is the distance between the first laser rangefinder 3 and the center line of the core shaft 17. The value of X1 is a fixed value and is written into the PLC.

[0045] L: L is the distance between the two laser rangefinders. L is also a fixed value and is written into the PLC.

[0046] L1: L1 is the distance between the second laser rangefinder 4 and the material roll 6 when the coiling vehicle 5 is at the height position.

[0047] L2: L2 is the distance between the first laser rangefinder 3 and the material roll 6 when the coiling car 5 is at the high position.

[0048] K: K is the actual width of the material roll 6. It is not a fixed value but is calculated by L, L1 and L2. The calculation formula is: K = L-L1-L2.

[0049] K1: K1 is the centerline value of the width of coil 6, not a fixed value. The calculation formula is: K1 = K / 2

[0050] X: X is the distance between the first laser rangefinder 3 and the coil 6 when the coil loading vehicle 5 transports the coil 6 to the uncoiler mandrel 17 and the centerline position of the coil 6 is consistent with the centerline position of the mandrel 17. X is not a fixed value. The width of the coil 6 is different, and the X value is different. The calculation formula is: X=X1-K1.

[0051] X2: X2 is when the coiler 5 automatically aligns itself and moves toward the unwinder mandrel 17, the first laser rangefinder 3 measures the real-time position value of the coil 6, and X2 is transmitted to the PLC. When X2=X, the coiler 5 stops running.

[0052] The utility model can measure the actual width of the material roll 6, and calculate the centerline position of the material roll 6 and the centerline position value of the unwinding machine core shaft 17 through the laser rangefinder and the PLC, no matter how wide the material roll 6 is, it can ensure that the material roll 6 can be at the centerline position of the core shaft 17 each time it is rolled up, and can effectively avoid the problem that the centerline position of the material roll 6 is inconsistent with the centerline position of the unwinding machine core shaft 17 due to different widths of the material roll 6 and different centerlines of the width of the material roll 6 when the material roll 6 is placed on the tray 9.

[0053] The utility model installs the first laser rangefinder 3 and the second laser rangefinder 4 on the uncoiler 1 and the storage and transportation roller 2 respectively, so that the monitoring direction is parallel to the running direction of the coiler 5, and there is no need to add a bracket to install the monitoring structure, thereby reducing the inconvenience caused by the extension of the bracket, and reducing the installation cost and the occupied area.

[0054] Example 2

[0055] like Figure 5 As shown, on the basis of Example 1, the coil centering device for the cold rolling mill during coiling in this embodiment further includes a pallet recovery roller 15, which is located directly below the storage and transportation roller 2, and has the same structure as the storage and transportation roller 2. The front end of the pallet recovery roller 15 is arranged backward compared to the front end of the storage and transportation roller 2. The pallet recovery roller 15 is provided with a sensor 16 for sensing the arrival of the coiling vehicle 5, the sensor 16 is electrically connected to the control device, and the sensor 16 is an infrared sensor 16.

[0056] When the pallet 9 is recovered, the reeling car 5 that has completed the reeling task transports the pallet 9 back and drives to the front end of the pallet recovery roller 15. When the reeling car 5 is sensed by the sensor 16, the control device controls the reeling car 5 to stop moving and controls the lifting rod 13 to automatically descend, so that the pallet 9 falls onto the pallet recovery roller 15, and then controls the pallet recovery roller 15 to move and transfer the pallet 9 backward. The reeling car 5 exits the pallet recovery roller 15 and continues to perform the task of moving the material roll 6.

[0057] The utility model is also provided with a pallet recovery roller 15, and the upper winding vehicle 5 cooperates with the pallet recovery roller 15 to realize automatic recovery of the pallet 9, without the need for manual participation in the recovery and the need to install a robot, which is conducive to further reducing equipment costs and reducing the equipment footprint.

[0058] The above description is a detailed description of the preferred feasible embodiment of the utility model, but the embodiment is not used to limit the scope of the patent application of the utility model. All equivalent changes or modified changes completed under the technical spirit suggested by the utility model should fall within the patent scope covered by the utility model.

Claims

1. A coil centering device for coiling a cold rolling mill, comprising a coiling car that performs linear reciprocating motion between an uncoiler and a storage roller and a control device electrically connected to the coiling car, characterized in that: A first laser rangefinder is provided on the uncoiler, and a second laser rangefinder is provided on the storage and transportation roller. The measuring directions of the first laser rangefinder and the second laser rangefinder are parallel to the running direction of the coiling vehicle, and when the material coil completes automatic height alignment, the first laser rangefinder and the second laser rangefinder are respectively arranged opposite to the front end face and the rear end face of the material coil; the first laser rangefinder and the second laser rangefinder are both electrically connected to the control device.

2. A coil centering device for a cold rolling mill according to claim 1, characterized in that: The storage and transportation roller comprises two conveying structures symmetrically arranged on the left and right and a plurality of pallets movably arranged on the two conveying structures; the conveying structure comprises a support frame and a plurality of conveying wheels arranged on the support frame and arranged in a line, the plurality of conveying wheels are transmission-connected to a conveying motor, and the conveying motor is electrically connected to a control device; the pallet is a square plate with a material roll placed inside, and tracks are arranged on the left and right sides of the bottom surface of the pallet, and the two tracks are movably mounted on the conveying wheels of the two conveying structures respectively.

3. The coil centering device for coiling in a cold rolling mill according to claim 2, characterized in that: Two limiting rollers are arranged in the tray, and the two limiting rollers are arranged symmetrically on the left and right.

4. A coil centering device for coiling in a cold rolling mill according to claim 3, characterized in that: The winding vehicle includes a vehicle body, a wheel group and a driving motor for driving the wheel group are arranged at the bottom of the vehicle body, a lifting rod is vertically arranged on the top surface of the vehicle body, a support seat is horizontally arranged on the top of the lifting rod, and the width of the support seat is smaller than the spacing between the two conveying structures, and the driving motor and the lifting rod are both electrically connected to the control device.

5. A coil centering device for coiling in a cold rolling mill according to claim 4, characterized in that: The control device is connected to the drive motor via a frequency converter. The drive motor is equipped with an encoder, and the encoder is electrically connected to the control device.

6. A coil centering device for coiling in a cold rolling mill according to claim 5, characterized in that: It also includes a pallet recovery roller conveyor, which is located directly below the storage and transportation roller conveyor and has the same structure as the storage and transportation roller conveyor.

7. A coil centering device for coiling in a cold rolling mill according to claim 6, characterized in that: The front end of the pallet recovery roller conveyor is arranged rearwardly compared to the front end of the storage and transportation roller conveyor.

8. The coil centering device for coiling in a cold rolling mill according to claim 7, characterized in that: The pallet recovery roller is provided with a sensor for sensing the position of the upper coiling vehicle, and the sensor is electrically connected to the control device.

9. A coil centering device for coiling in a cold rolling mill according to claim 8, characterized in that: The sensor is an infrared sensor, and the control device is a PLC.

Images