Rotary conductive device for plate warm rolling

Abstract

The utility model relates to a rotary conductive device for plate warm rolling, and belongs to the field of metal warm rolling. The device comprises a conductive plate, a carbon brush, a copper sleeve, a mounting bracket and a line bank, the copper sleeve is thermally mounted on the transmission side of a working roller, the carbon brush is in close contact with the copper sleeve, and the conductive copper plate and the carbon brush are fixed on a rolling mill stand housing through the mounting bracket. According to the device, the current is transmitted to the magnesium alloy plate from the electrode plate through the rotary conductive device, so that efficient and accurate online heating is realized. The scheme aims at solving the application limitation of the existing heating technology on the warm rolling mill, improving the production efficiency and the product quality, reducing the energy consumption, simplifying the structure, improving the safety and enhancing the adaptability.

Description

Technical Field

[0001] The utility model belongs to the field of metal warm rolling and relates to a plate warm rolling rotating conductive device. Background Art

[0002] Heating technology is a critical component in metal processing, particularly magnesium alloy sheet processing. Traditional heating methods, such as flame heating, electric furnace heating, and induction heating, are limited in their application to warm rolling mills, primarily because these devices cannot accommodate the space constraints of the roll gap within the warm rolling mill's stands. Therefore, a device capable of in-line heating of magnesium alloy sheet in warm rolling mills is needed.

[0003] Although some technical solutions have attempted to heat the plates online on warm rolling mills, these solutions often suffer from low heating efficiency, poor temperature control accuracy, and complex equipment structures. Therefore, there is a need for an efficient, precise, simple, and adaptable online heating device for warm rolling of magnesium alloy plates. Utility Model Content

[0004] In light of this, the present invention aims to provide a rotating conductive device for continuous, efficient, and precise online heating of magnesium alloy sheets on warm rolling mills. This solution aims to address the limitations of existing heating technologies in warm rolling mills by providing a heating solution that can accommodate the limited roll gap space within warm rolling mill stands. This solution enables rapid heating of magnesium alloy sheets while ensuring precise control and safety during the heating process, improving production efficiency and product quality.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions:

[0006] A plate warm rolling rotary conductive device is provided on a roller for warm rolling the plate, comprising:

[0007] Conductive copper plate, used to conduct electric current;

[0008] Carbon brushes, which are in contact with the conductive copper plates, are used to transfer current;

[0009] The copper sleeve is fixed on the driving side of the roller and contacts the carbon brush.

[0010] Optionally, a mounting bracket for fixing the conductive copper plate is further included, which is fixedly arranged on a side of the conductive copper plate away from the carbon brushes.

[0011] Optionally, an insulating plate is provided between the mounting bracket and the conductive copper plate.

[0012] Optionally, a terminal block is provided on the conductive copper plate for conducting current from the conductive copper plate to the carbon brushes.

[0013] Optionally, the terminal block is used to connect the conductive carbon brushes to the converter and the transformer.

[0014] Optionally, a brush holder is provided on the conductive copper plate, and the carbon brush is fixed in the brush holder.

[0015] Optionally, the brush holders are placed symmetrically in 4 rows in parallel.

[0016] Optionally, each brush holder can hold 6 carbon brushes.

[0017] Optionally, the carbon brush contact surface adopts an arc design to ensure the maximum fitting surface after being pressed against the copper sleeve.

[0018] Optionally, the copper sleeve is fixed to the transmission side of the roller by shrink fitting.

[0019] The beneficial effects of the present invention are:

[0020] Efficient current transmission: The rotating conductive device can quickly and efficiently transfer current from the electrode plate to the magnesium alloy plate, improving heating efficiency.

[0021] Precise temperature control: By precisely controlling current and temperature, this device can ensure the temperature uniformity of the magnesium alloy plate throughout the entire heating process, helping to improve product quality.

[0022] Simple structure: The device has a simple structural design, which is easy to install and maintain, and reduces production costs.

[0023] Safe and reliable: The design of the rotating conductive device takes safety factors into consideration, such as the use of insulating materials, to ensure the safety of operators.

[0024] Strong adaptability: This device can adapt to magnesium alloy plates of different specifications, improving the versatility and flexibility of the equipment.

[0025] Reduce energy consumption: Due to the efficient heating performance of this device, energy consumption can be reduced, achieving energy conservation and emission reduction.

[0026] Easy to operate: The device is easy to operate, which reduces the training cost and operation difficulty of the operator.

[0027] Improve production efficiency: By achieving continuous and rapid heating of magnesium alloy plates, this device can significantly improve production efficiency.

[0028] Prolong equipment life: Due to the use of high temperature resistant and wear-resistant materials, the service life of this device is extended.

[0029] Reduce maintenance costs: The simple structural design of this device reduces maintenance costs and improves equipment reliability.

[0030] Other advantages, objectives, and features of the present invention will be described in detail in the following description and, to some extent, will be apparent to those skilled in the art upon examination and study of the following or may be learned from practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below with reference to the accompanying drawings, in which:

[0032] Figure 1 This is the structural diagram of this scheme;

[0033] Figure 2 This is the structural diagram of this scheme from another perspective;

[0034] Figure 3 The following is a schematic diagram of a usage scenario of this solution.

[0035] Figure numerals: 1 clamping device, 2 transformer, 3 current conversion device, 4 conductor, 5 infrared thermometer, 6 rotating conductive device, 7 working roller, 8 magnesium alloy plate, 9 tension cylinder, 61 copper sleeve, 62 insulating plate, 63 mounting bracket, 64 terminal block, 65 brush holder, 66 conductive plate, 67 carbon brush. DETAILED DESCRIPTION

[0036] The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand the other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. The following embodiments and the features in the embodiments can be combined with each other without conflict.

[0037] Among them, the accompanying drawings are only for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limiting the present invention. In order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the accompanying drawings.

[0038] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships, they are based on the directions or positional relationships shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0039] See also Figures 1 to 3 The rotating conductive device 6 is installed on the warm rolling roll, usually on the transmission side of the lower working roll 7, and consists of a mounting bracket 63, a conductive plate 66, a carbon brush 67, a brush holder 65, a terminal block 64, an insulating plate 62 and a copper sleeve 61. The copper sleeve 61 is heat-fitted on the transmission side of the working roll 7, and the carbon brush 67 is in close contact with the copper sleeve 61. The conductive copper plate and the carbon brush 67 are fixed to the rolling mill frame arch by the mounting bracket 63, and the conductive copper plate and the frame arch are insulated by the insulating plate 62. In order to ensure a maximum current conduction capacity of 6600A, the carbon brushes 67 of the rotating conductive device 6 are placed symmetrically in parallel in 4 rows, and each brush holder 65 is equipped with 6 carbon brushes 67. The contact surface of the carbon brush 67 adopts an arc design to ensure the maximum fitting surface after being pressed against the copper sleeve 61.

[0040] The heating control system controls the power output of the left transformer 2 through the left converter 3 and controls the power output of the right transformer 2 through the right converter 3. The left converter 3 and the right converter 3 use power supplies of the same phase.

[0041] Before heating begins, the heating control system calculates the safe current that the magnesium alloy sheet 8 can carry based on its width and thickness. Using a current setting model, it generates a set current value, ensuring both a safe and efficient heating rate. An infrared thermometer 5 monitors the temperature of the magnesium alloy sheet 8 in real time and provides feedback to the heating control system's microprocessor. Through closed-loop control, the inverter's output current is adjusted to maintain closed-loop temperature control of the magnesium alloy sheet 8. When the process temperature setpoint is reached, the rollers rotate to begin rolling. The infrared thermometer 5 monitors the temperature of the magnesium alloy sheet 8 in real time and provides additional temperature compensation.

[0042] One usage scenario of this solution is as follows Figure 3As shown, the device adopts the principle of resistance heating, and passes low voltage and high current into the magnesium alloy plate 8 for heating. The roller is used as an electrode, and the left tension cylinder 9 clamp and the right tension cylinder 9 clamp are used as other electrodes. The left tension cylinder 9 clamp and the roller form a closed current loop, and the right tension cylinder 9 clamp and the roller form another closed current loop. The two loops can perform current and temperature closed-loop control separately.

[0043] When the rolls are stationary, current can be passed through the magnesium alloy sheet 8 being rolled to heat it. When the sheet is positioned between the left tension cylinder 9 clamp and the rolls, the left heating and current conversion device 3 operates. When the sheet is positioned between the right tension cylinder 9 clamp and the rolls, the right heating and current conversion device 3 operates. This design facilitates reciprocating sheet rolling. When the rolls are rotating, current can be passed through both the left and right heating and current conversion devices 3 simultaneously to compensate for the sheet's temperature.

[0044] During heating, this device requires the mill's roll gap to be closed, and the rollers to maintain a certain pressure on the magnesium alloy sheet 8, ensuring full contact between the rollers and the sheet 8 and facilitating the transfer of current from the rollers to the sheet. The heating converter 3 utilizes thyristor phase-shift control, with continuously adjustable output voltage. Depending on the needs, either constant voltage or constant current control modes can be selected. A transformer 2 converts the power output of converter 3 into a low-voltage, high-current form to heat the magnesium alloy sheet 8. This not only facilitates operator safety but also isolates the converter 3 from the grid, ensuring that the grid voltage is not affected.

[0045] During rolling, the rollers are connected to the electrode plates of the transformer 2 using a rotating conductive device 6, ensuring reliable and stable current transfer from the electrode plates to the magnesium alloy sheet 8 during roller rotation. The cross-sectional area is calculated based on the width and thickness of the magnesium alloy sheet 8, and the heating output current is limited based on the safe conduction current that this cross-sectional area can withstand, ensuring that the heating current does not damage the sheet. This device is equipped with an infrared thermometer 5, which can continuously and non-contactly measure the sheet temperature, facilitating continuous, real-time temperature monitoring of the magnesium alloy sheet 8.

[0046] On a warm rolling mill, a magnesium alloy sheet 8 is passed through the roll gap of the mill's work rolls 7 and placed between the left and right tension cylinders 9. A clamping device 1 is located at the front end of the tension cylinder 9, gripping the magnesium alloy sheet 8 at both ends, closing the roll gap and ensuring close contact between the rolls and the magnesium alloy sheet 8. The left clamp and the roller's rotating conductive device 6 are connected to the two electrodes on the secondary side of the left heating transformer 2, respectively. The right clamp and the roller's rotating conductive device 6 are connected to the two electrodes on the secondary side of the right heating transformer 2, respectively. The left and right heating transformers 2 each form two independent heating circuits, and temperature control of the magnesium alloy sheet 8 is achieved through independent current control of each heating circuit. When the rolls are stationary, current can be continuously supplied to the magnesium alloy sheet 8. When the rolls are rotating, a continuous, stable current is supplied to the magnesium alloy sheet 8 via the work rolls 7 through the rotating conductive device 6. The rotating conductive device 6 is connected to both the left and right heating circuits, allowing current to flow simultaneously or independently.

[0047] The heating device for the magnesium alloy plate 8 consists of a current converter 3, a transformer 2, an infrared thermometer 5, left and right tension cylinder 9 clamps, a work roll 7, a rotating conductive device 6, a copper busbar, and a conductor 4. The transformer 2, located before the clamp and roll current circuit, controls the current converter power supply to apply heating current based on the rolling direction and plate thickness, thereby heating the magnesium alloy plate 8.

[0048] A conductive copper busbar is installed on the side of the left clamp and connected to one end of the secondary side of the left transformer 2 with a cable. A conductive copper busbar is installed on the side of the right clamp and connected to one end of the secondary side of the right transformer 2 with a cable. The other ends of the left transformer 2 and the right transformer 2 are connected to the conductive plate 66 of the rotating conductive device 6 with a cable.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. A plate warm rolling rotary conductive device, characterized in that: Set on the roll for warm rolling of plate, including: Conductive copper plate, used to conduct electric current; Carbon brushes, which are in contact with the conductive copper plates, are used to transfer current; Copper sleeve, fixed on the driving side of the roller, in contact with the carbon brush; A brush holder is provided on the conductive copper plate, and the carbon brush is fixed in the brush holder; The brush holders are placed symmetrically in 4 rows in parallel; Each brush holder holds 6 carbon brushes; The carbon brush contact surface adopts arc design to ensure the maximum fit with the copper sleeve after being pressed; The copper sleeve is fixed on the transmission side of the roller by shrink fitting.

2. The plate warm rolling rotary conductive device according to claim 1, characterized in that: The device also includes a mounting bracket for fixing the conductive copper plate, which is fixedly arranged on a side of the conductive copper plate away from the carbon brushes.

3. The plate warm rolling rotary conductive device according to claim 2, characterized in that: An insulating plate is arranged between the mounting bracket and the conductive copper plate.

4. The plate warm rolling rotary conductive device according to claim 1, characterized in that: A terminal block is provided on the conductive copper plate for conducting current from the conductive copper plate to the carbon brushes.

5. The plate warm rolling rotary conductive device according to claim 4, characterized in that: The terminal block is used to connect the conductive carbon brushes to the converter and transformer.

Images