A roll head structure of a cold rolling mill

Abstract

The utility model relates to cold rolling mill technical field discloses a kind of rolling head structures of cold rolling mill, including rack and hydraulic system, the inside of rack is equipped with roll one and roll two by bearing seat, the top of bearing seat is provided with heat dissipation mechanism, heat dissipation mechanism includes heat dissipation box, cooling water pipe and water inlet pipe, the top of cooling water pipe is fixedly connected with cleaning pipe, the inner wall of cleaning pipe is equipped with sliding slot, sliding slot is slidably connected with sliding frame in its inside, the bottom of sliding frame is fixedly connected with connecting barrel, the inside of connecting barrel is provided with scale remover. The rolling head structure of the cold rolling mill, through the linkage design of temperature sensor, PLC controller and solenoid valve, external water pump, cooling water flow can be adjusted in real time according to bearing seat temperature, avoid temperature excessively high or excessive cooling to cause damage to equipment components, while the scale remover in cleaning pipe and the connecting barrel structure driven by sliding frame, can decompose cooling water pipe inner wall scale and discharge through blowdown pipe, ensure that cooling water pipe is unobstructed.

Description

Technical Field

[0001] This utility model belongs to the field of cold rolling mill technology, specifically, it relates to a rolling head structure of a cold rolling mill. Background Technology

[0002] In the sheet metal rolling industry of cold rolling mills, the rolling head is the core component that directly realizes the plastic deformation of the sheet metal, and its operating status directly determines the rolling quality of the sheet metal and the service life of the equipment. Currently available cold rolling mill rolling head structures generally suffer from poor heat dissipation and lubrication coordination: On the one hand, the friction between the rollers and the sheet metal, as well as the rotation of the bearings, continuously generate heat during the rolling process. Existing heat dissipation structures are mostly single water-cooled or air-cooled, lacking temperature adaptive adjustment capabilities. This easily leads to excessively high temperatures in the bearing housing and rollers due to heat accumulation, which not only alters the microstructure of the sheet metal and reduces product precision but also accelerates bearing wear. On the other hand, bearing lubrication often uses a fixed oil injection method, which prevents precise delivery of lubricating oil to the lubrication points and lacks descaling and cleaning designs. The inner walls of the cooling water pipes are prone to scaling and blockage, further weakening the heat dissipation effect. Ultimately, this leads to increased equipment downtime for maintenance, seriously affecting production continuity and stability. Utility Model Content

[0003] The purpose of this invention is to provide a rolling head structure for a cold rolling mill to solve the problems mentioned in the background art.

[0004] A rolling head structure for a cold rolling mill includes a frame and a hydraulic system installed at the top inside the frame. Roll 1 and Roll 2 are installed inside the frame via bearing seats, and a heat dissipation mechanism is provided at the top of the bearing seats.

[0005] The heat dissipation mechanism includes a heat dissipation box, a cooling water pipe, and a water inlet pipe. The heat dissipation box is fixedly installed on the top of the bearing seat, the cooling water pipe is installed inside the heat dissipation box, and the water inlet pipe is fixedly connected to the side of the frame.

[0006] A cleaning pipe is fixedly connected to the top of the cooling water pipe. A groove is formed on the inner wall of the cleaning pipe, and a sliding frame is slidably connected inside the groove. A connecting cylinder is fixedly connected to the bottom of the sliding frame, and a descaling agent is placed inside the connecting cylinder. The descaling agent is food-grade calcium citrate.

[0007] In a preferred embodiment of this invention, the cooling water pipe penetrates the interior of the heat sink and the bearing housing. One end of the inlet pipe is connected to an external water pump, and the other end is connected to the cooling water pipe. A drain pipe is fixedly connected to the lowest point of the cooling water pipe. The cooling water pipe penetrates the heat sink and the bearing housing, allowing direct contact with the core heat-generating area, significantly improving heat transfer efficiency and preventing heat accumulation inside the bearing housing.

[0008] As a preferred embodiment of the present utility model, a temperature sensor is installed inside the bearing seat, an electromagnetic valve is installed at the connection between the cooling water pipe and the heat dissipation box, and the temperature sensor and the electromagnetic valve are electrically connected with an external water pump through a PLC controller. The temperature sensor can capture the temperature change of the bearing seat in real time, and realize the linkage with the electromagnetic valve and the water pump through the PLC controller, which can automatically adjust the supply state of cooling water according to the temperature.

[0009] As a preferred embodiment of the present utility model, a mounting frame is fixedly installed on the top of the bearing seat, a partition plate is fixedly connected to the top of the mounting frame, an oil filling pipe is fixedly installed inside the partition plate, and a dropper is fixedly connected to the bottom of the oil filling pipe. The mounting frame and the partition plate can stably fix the oil filling pipe, preventing the oil filling pipe from displacing due to equipment vibration; the dropper design can accurately guide the lubricating oil to the designated position.

[0010] As a preferred embodiment of the present utility model, a lubrication hole is formed on the surface of the bearing seat, and the bottom end of the dropper extends into the lubrication hole. The bottom end of the dropper extends into the lubrication hole, which can directly deliver the lubricating oil to the rolling contact area of the bearing.

[0011] As a preferred embodiment of the present utility model, the hydraulic system includes a hydraulic machine, a connecting column, a hydraulic cylinder, a lifting frame and a connecting frame, the connecting column is fixedly connected to the top inside the frame, the hydraulic machine is fixedly installed on the side of the connecting column, the hydraulic cylinder is fixedly installed on the top of the hydraulic machine, the lifting frame is connected to the output end of the hydraulic cylinder, and the connecting frame is fixedly connected to the bottom of the lifting frame.

[0012] As a preferred embodiment of the present utility model, the bottom of the connecting frame is connected with the bearing seat, and the bearing seat is slidably connected with the inner wall of the frame. The connecting column provides stable support for the hydraulic machine, preventing the hydraulic machine from shaking due to force during operation.

[0013] Compared with the prior art, the present utility model has the following beneficial effects:

[0014] 1. In the rolling head structure of the cold rolling mill, through the linkage design of the temperature sensor, the PLC controller, the electromagnetic valve and the external water pump, the cooling water flow can be adjusted in real time according to the temperature of the bearing seat, so as to avoid damage to equipment components caused by excessively high temperature or overcooling. Meanwhile, the scale remover in the cleaning pipe and the connecting cylinder structure driven by the sliding frame can decompose the scale on the inner wall of the cooling water pipe and discharge it through the sewage pipe, ensuring the cooling water pipe is unobstructed.

[0015] 2. The rolling head structure of this cold rolling mill, through the oil injection pipe fixed by the mounting bracket and the dropper extending to the lubrication hole of the bearing housing, can accurately and quantitatively deliver lubricating oil to the inside of the bearing, forming a stable lubricating oil film between the bearing rolling elements and the inner and outer rings, significantly reducing friction and wear. At the same time, the lubricating oil film can play a role in dust prevention and rust prevention, reducing the corrosion of the bearing by external impurities.

[0016] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0017] In the attached diagram:

[0018] Figure 1 This is a schematic diagram of the cold rolling mill rolling mechanism of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the roller of this utility model;

[0020] Figure 3 This is a schematic diagram of the heat dissipation box structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of the cleaning tube of this utility model;

[0022] Figure 5 This is a schematic diagram of the oil injection pipe structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the hydraulic system structure of this utility model.

[0024] In the diagram: 1. Frame; 2. Hydraulic press; 3. Roll 1; 4. Roll 2; 5. Bearing housing; 6. Heat sink; 7. Cooling water pipe; 8. Inlet pipe; 9. Cleaning pipe; 10. Slide groove; 11. Sliding frame; 12. Connecting cylinder; 13. Descaling agent; 14. Mounting frame; 15. Partition plate; 16. Oil injection pipe; 17. Drip pipe; 18. Connecting column; 19. Hydraulic cylinder; 20. Lifting frame; 21. Connecting frame; 22. Solenoid valve; 23. Temperature sensor. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model.

[0026] Example 1:

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6As shown, a rolling head structure of a cold rolling mill includes a frame 1 and a hydraulic system installed at the top inside the frame 1. Roll 3 and roll 4 are installed inside the frame 1 through bearing seats 5. A heat dissipation mechanism is provided at the top of the bearing seats 5.

[0028] The heat dissipation mechanism includes a heat sink 6, cooling water pipes 7, and an inlet pipe 8. The heat sink 6 is fixedly installed on the top of the bearing housing 5. The cooling water pipes 7 are installed inside the heat sink 6. The inlet pipe 8 is fixedly connected to the side of the frame 1. The cooling water pipes 7 pass through the interior of the heat sink 6 and the bearing housing 5. One end of the inlet pipe 8 is connected to an external water pump, and the other end is connected to the cooling water pipe 7. A drain pipe is fixedly connected to the lowest point of the cooling water pipe 7. One end of the inlet pipe 8 is connected to the external water pump via a flange, and the other end is connected to the cooling water pipe 7. A sealing gasket is also required for the flange connection. A drain pipe is fixedly connected to the lowest point of the cooling water pipe 7, and a shut-off valve is installed on the drain pipe to facilitate the periodic discharge of wastewater and scale.

[0029] A temperature sensor 23 is installed inside the bearing housing 5. A solenoid valve 22 is installed at the connection between the cooling water pipe 7 and the heat sink 6. The temperature sensor 23 and the solenoid valve 22 are electrically connected to the external water pump via a PLC controller. The temperature sensor 23 is a PT100 platinum resistance sensor with a measurement range of -20℃ to 150℃ and an accuracy of ±0.5℃. During installation, it is necessary to ensure that the sensor is in close contact with the bearing housing 5, which can be fixed by a threaded connection. The solenoid valve 22 is installed at the connection between the cooling water pipe 7 and the heat sink 6. The solenoid valve 22 is a DN15 type with a maximum flow rate of 15L / min. Its compatibility with the cooling water pipe 7 must be ensured. Finally, the temperature sensor 23 and the solenoid valve 22 are electrically connected to the external PLC controller via wires. The wires must be protected by conduit to avoid external interference or damage.

[0030] A mounting bracket 14 is fixedly installed on the top of the bearing housing 5. A partition 15 is fixedly connected to the top of the mounting bracket 14. An oil injection pipe 16 is fixedly installed inside the partition 15. A dropper 17 is fixedly connected to the bottom of the oil injection pipe 16. A lubrication hole is opened on the surface of the bearing housing 5. The bottom end of the dropper 17 extends into the lubrication hole.

[0031] The hydraulic system includes a hydraulic press 2, a connecting column 18, a hydraulic cylinder 19, a lifting frame 20, and a connecting frame 21. The connecting column 18 is fixedly connected to the top of the inside of the frame 1. The hydraulic press 2 is fixedly installed on the side of the connecting column 18. The hydraulic cylinder 19 is fixedly installed on the top of the hydraulic press 2. The lifting frame 20 is connected to the output end of the hydraulic cylinder 19. The connecting frame 21 is fixedly connected to the bottom of the lifting frame 20. The bottom of the connecting frame 21 is connected to the bearing seat 5. The bearing seat 5 is slidably connected to the inner wall of the frame 1.

[0032] Example 2:

[0033] Based on Example 1, please refer to Figure 4 A cleaning pipe 9 is fixedly connected to the top of the cooling water pipe 7. A groove 10 is provided on the inner wall of the cleaning pipe 9. A sliding frame 11 is slidably connected inside the groove 10. A connecting cylinder 12 is fixedly connected to the bottom of the sliding frame 11. A descaling agent 13 is provided inside the connecting cylinder 12. The descaling agent 13 is food-grade calcium citrate.

[0034] Working principle:

[0035] When the cold rolling mill needs to perform rolling operations, it first sends a command to the PLC controller through the external control system according to the thickness requirements of the metal sheet to be rolled. The PLC controller then transmits the command to the hydraulic press 2. After receiving the command, the hydraulic press 2 drives the hydraulic cylinder 19 to move. The output end of the hydraulic cylinder 19 drives the lifting frame 20 to move up and down. The lifting frame 20 drives the bearing seat 5 to slide up and down along the sliding track on the inner wall of the frame 1 through the connecting frame 21. Since the first roll 3 and the second roll 4 are mounted on the bearing seat 5, the gap between the first roll 3 and the second roll 4 will change with the movement of the bearing seat 5 until it is adjusted to a gap that matches the thickness of the sheet to be rolled, thus completing the gap adjustment work before rolling.

[0036] After the roller spacing is adjusted, the metal sheet to be rolled is fed into the rolling channel formed between roller 3 and roller 4. The roller drive device is activated, driving roller 3 and roller 4 to rotate in opposite directions at a preset speed. Under the friction of the rollers, the metal sheet is drawn between the two rollers. Simultaneously, the hydraulic system continuously applies pressure to the bearing housing 5, causing the rollers to generate rolling force on the metal sheet. Under the action of the rolling force, the metal sheet undergoes plastic deformation, and its thickness gradually decreases until the preset rolling thickness is reached, completing the rolling process. During the rolling process, the rollers continue to rotate, continuously conveying the metal sheet forward, realizing continuous rolling operation.

[0037] During the rolling process, the friction between the roller and the metal sheet, as well as the rotation of the bearing, generates a large amount of heat, causing the temperature of the bearing housing 5 and the roller to rise. At this time, the temperature sensor 23 installed inside the bearing housing 5 monitors the temperature of the bearing housing 5 in real time and converts the temperature signal into an electrical signal, which is then transmitted to the PLC controller. When the temperature signal received by the PLC controller indicates that the temperature of the bearing housing 5 exceeds a preset threshold, the PLC controller immediately sends control commands to the solenoid valve 22 and the external water pump. Upon receiving the command, the solenoid valve 22 increases its opening, and the external water pump increases its speed, increasing the flow rate of cooling water. Cooling water enters the cooling water pipe 7 through the inlet pipe 8. Since the cooling water pipe 7 passes through the interior of the heat sink 6 and the bearing housing 5 and is in close contact with the bearing housing 5, the cooling water absorbs the heat transferred from the bearing housing 5 and the roller as it flows within the cooling water pipe 7, gradually reducing the temperature of the bearing housing 5 and the roller. The cooled water, having absorbed the heat, flows out from the outlet of the cooling water pipe 7. If the equipment is equipped with a cooling water tank, the outflowing cooling water can be introduced into the cooling water tank for cooling and then recycled; otherwise, it is discharged directly. When the temperature sensor 23 detects that the temperature of the bearing housing 5 has dropped to a preset lower limit, such as 30°C, the PLC controller will control the solenoid valve 22 to reduce the valve opening, reduce the speed of the external water pump, and reduce the cooling water flow to save water resources and energy and achieve heat dissipation on demand.

[0038] During long-term use, scale easily accumulates on the inner wall of cooling water pipe 7, affecting the flow of cooling water and heat dissipation. At this time, the descaling agent 13 installed in the cleaning pipe 9 slowly dissolves under the immersion of cooling water. The dissolved descaling agent 13 flows with the cooling water within the cooling water pipe 7, reacting chemically with the scale on the inner wall of the pipe, decomposing the scale into soluble substances. Simultaneously, commands can be periodically sent to the PLC controller via an external control system. The PLC controller controls the sliding frame 11 to slide back and forth within the groove 10 of the cleaning pipe 9. The sliding frame 11 drives the connecting cylinder 12, allowing the descaling agent 13 within the connecting cylinder 12 to mix more thoroughly with the cooling water, improving the descaling effect. The decomposed scale-soluble substances flow with the cooling water to the drain pipe at the lowest point of the cooling water pipe 7. Periodically opening the shut-off valve on the drain pipe allows the wastewater containing scale-soluble substances to be discharged, achieving the cleaning and descaling of the cooling water pipe 7, ensuring unobstructed flow and effective heat dissipation.

[0039] During equipment operation, the lubrication system operates continuously to reduce wear on the bearings inside bearing housing 5 and ensure normal bearing operation. Under gravity, lubricating oil in oil injection pipe 16 drips through dropper 17 into the lubrication holes of bearing housing 5 at a rate of 1-2 drops / second. The lubricating oil flows into the bearing interior along the lubrication holes, forming a lubricating film between the rolling elements and the inner and outer rings. This lubricating film reduces friction and wear between the rolling elements and the inner and outer rings, reduces heat generated by friction, and also acts as a rust and dust preventer, protecting the bearing from external impurities and extending its service life. During equipment operation, the working status of the lubrication system can be monitored in real time by a PLC controller. If abnormal oil dripping is detected by dropper 17, the PLC controller will promptly issue an alarm signal to remind personnel to inspect and maintain the equipment.

[0040] While embodiments or examples of this disclosure have been described with reference to the accompanying drawings, it should be understood that the above embodiments are merely exemplary embodiments or examples, and the scope of this utility model is not limited by these embodiments or examples, but only by the granted claims and their equivalents. Various elements in the embodiments or examples may be omitted or replaced by their equivalents. Furthermore, the steps may be performed in a different order than that described in this disclosure. Further, various elements in the embodiments or examples may be combined in various ways. Importantly, as the technology evolves, many elements described herein can be replaced by equivalents that appear after this disclosure.

Claims

1. A rolling head structure for a cold rolling mill, comprising a frame (1) and a hydraulic system installed at the top inside the frame (1), characterized in that: Inside the frame (1), a first roll (3) and a second roll (4) are installed via a bearing seat (5), and a heat dissipation mechanism is provided on the top of the bearing seat (5); The heat dissipation mechanism includes a heat dissipation box (6), a cooling water pipe (7) and a water inlet pipe (8). The heat dissipation box (6) is fixedly installed on the top of the bearing seat (5). The cooling water pipe (7) is installed inside the heat dissipation box (6). The water inlet pipe (8) is fixedly connected to the side of the frame (1). A cleaning pipe (9) is fixedly connected to the top of the cooling water pipe (7). A sliding groove (10) is provided on the inner wall of the cleaning pipe (9). A sliding frame (11) is slidably connected inside the sliding groove (10). A connecting cylinder (12) is fixedly connected to the bottom of the sliding frame (11). A descaling agent (13) is provided inside the connecting cylinder (12). The descaling agent (13) is food-grade calcium citrate.

2. The rolling head structure of a cold rolling mill according to claim 1, characterized in that: The cooling water pipe (7) passes through the interior of the heat sink box (6) and the bearing seat (5). One end of the water inlet pipe (8) is connected to an external water pump, and the other end is connected to the cooling water pipe (7). A drain pipe is fixedly connected to the lowest point of the cooling water pipe (7).

3. The rolling head structure of a cold rolling mill according to claim 1, characterized in that: A temperature sensor (23) is installed inside the bearing housing (5), and a solenoid valve (22) is installed at the connection between the cooling water pipe (7) and the heat sink (6). The temperature sensor (23) and the solenoid valve (22) are electrically connected to an external water pump through a PLC controller.

4. The rolling head structure of a cold rolling mill according to claim 1, characterized in that: A mounting bracket (14) is fixedly installed on the top of the bearing housing (5). A partition (15) is fixedly connected to the top of the mounting bracket (14). An oil injection pipe (16) is fixedly installed inside the partition (15). A drip pipe (17) is fixedly connected to the bottom of the oil injection pipe (16).

5. The rolling head structure of a cold rolling mill according to claim 4, characterized in that: The bearing housing (5) has a lubrication hole on its surface, and the bottom end of the dropper (17) extends into the lubrication hole.

6. The rolling head structure of a cold rolling mill according to claim 1, characterized in that: The hydraulic system includes a hydraulic press (2), a connecting column (18), a hydraulic cylinder (19), a lifting frame (20), and a connecting frame (21). The connecting column (18) is fixedly connected to the top of the machine frame (1). The hydraulic press (2) is fixedly installed on the side of the connecting column (18). The hydraulic cylinder (19) is fixedly installed on the top of the hydraulic press (2). The lifting frame (20) is connected to the output end of the hydraulic cylinder (19). The connecting frame (21) is fixedly connected to the bottom of the lifting frame (20).

7. The rolling head structure of a cold rolling mill according to claim 6, characterized in that: The bottom of the connecting frame (21) is connected to the bearing seat (5), and the bearing seat (5) is slidably connected to the inner wall of the frame (1).

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