A temperature homogenization control device for cold rolling rolls

Abstract

The utility model relates to rolling mill technical field discloses a temperature homogenization control equipment of cold rolling roller, including two symmetrical settings movable frame in rolling mill both sides, the frame of rolling mill feeding end side symmetry is provided with two sets of cooling device, the frame of rolling mill discharge end side is provided with the temperature measuring device same as the number of roller horizontally, the back of temperature measuring device is provided with warning light, when the roller temperature is higher than high temperature threshold value, then warning light is lit, and the roller is cooled down through cooling device, when the roller temperature is lower than low temperature threshold value, then warning light changes color, and cooling device stops working, and when the roller temperature is in the working temperature interval range, then warning light does not bright. The utility model is simple to operate, is applicable to different types of cold rolling mill, through real -time temperature measurement and the intermittent work of cooling device, can make the roller timely cooling down, avoids the roller cooling excessively, and further guarantees the product quality.

Description

Technical Field

[0001] This utility model relates to the field of rolling mill technology, specifically to a temperature uniformity control device for cold rolling rolls. Background Technology

[0002] The cold rolling process is a continuous deformation process of strip steel under the action of rolling force. The strip steel enters the roll gap under the action of friction. As the strip steel rolls continuously, a large amount of frictional heat is generated between the rolls and the strip steel. After the strip steel enters the roll gap area, it undergoes elastic-plastic deformation after being squeezed between the work rolls, thereby generating deformation energy. In multi-roll mills, the friction between the work rolls and the intermediate rolls also generates a large amount of heat.

[0003] As rolling time increases, the temperature of the rolls rises, which leads to a decrease in the surface hardness of the rolls and a reduction in deformation resistance. As a result, a greater rolling force is required to achieve the same reduction. High temperature will cause changes in the friction coefficient of the roll surface, which may lead to problems such as strip slippage and deviation.

[0004] Existing methods for cooling cold rolling rolls mainly involve direct spraying of water or emulsion or setting up coolant channels inside the roll. These methods can quickly remove a large amount of heat and cool the roll in a short time. However, if the roll temperature is too low, the oil droplets in the emulsion will become larger, reducing its lubrication performance. Therefore, a temperature uniformity control device for cold rolling rolls is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a temperature uniformity control device for cold rolling rolls to solve the problems of excessive or insufficient cooling of cold rolling rolls.

[0006] To solve the above-mentioned technical problems, this utility model specifically provides the following technical solution: A temperature uniformity control device for cold rolling rolls includes: First mounting bracket, The cooling device includes a coolant pipe for spraying coolant and a drive system for driving the coolant pipe to perform circumferential oscillation so that the coolant pipe can selectively spray coolant onto any one of the cold rolling rolls. The drive system includes two parallel and symmetrically arranged swing arms. One end of each swing arm is fixedly connected to a coolant pipe. A positioning shaft is perpendicularly connected to each swing arm. The two positioning shafts are coaxially arranged and connected to the frame through a second bearing. The other end of the swing arm is connected to an eccentric wheel through a connecting rod. The connecting rod is rotatably connected to the swing arm and the eccentric wheel. The eccentric wheel is connected to the first mounting bracket through a first bearing. A motor is connected to the eccentric wheel and drives it to rotate, so that the coolant pipe performs a circular oscillation.

[0007] Furthermore, when the connecting rod and the rotation center of the eccentric wheel are collinear for the first time, the swing rod is in the first position. When the connecting rod and the rotation center of the eccentric wheel are collinear for the second time, the swing rod is in the second position. When the swing rod swings to its maximum angle, it is in the third position. The angle θ1 that the eccentric wheel passes through when rotating counterclockwise from the first position to the second position is θ1, and the angle θ2 that the eccentric wheel passes through when rotating counterclockwise from the second position to the third position is θ2, where θ1 > θ2. Under the condition that the eccentric wheel rotates at a constant speed, the time required to pass through angle θ1 is greater than the time required to pass through angle θ2. The area between the angle between the first position and the second position is the working area of ​​the coolant pipe on the work roll, and the area between the angle between the second position and the third position is the working area of ​​the coolant pipe on the intermediate roll and the support roll, so that the speed of the coolant pipe passing through the work roll is lower than the speed passing through other rolls.

[0008] Furthermore, it also includes a temperature measuring device, including multiple mounting bases corresponding to each cold rolling roll, with multiple temperature measuring probes installed on the mounting bases, and the multiple temperature measuring probes distributed along the axial direction of the cold rolling roll; The controller is electrically connected to the temperature probe and the drive system. Based on the temperature signal transmitted by each temperature probe, it sends a working command to the drive system so that the coolant pipe is directed toward the cold rolling roll whose temperature exceeds the high temperature threshold, or shuts off the atomizing nozzle when the roll temperature is below the low temperature threshold. The second mounting bracket is used to fix the temperature measuring device.

[0009] Furthermore, the atomizing nozzles on the side of the coolant pipe are arranged at unequal intervals, and the distance between two adjacent atomizing nozzles gradually decreases from both ends to the middle. Each atomizing nozzle is equipped with an independent solenoid valve, and each solenoid valve is electrically connected to the controller.

[0010] Furthermore, multiple warning lights are provided on the other side of the mounting base opposite the rollers. The positions of the warning lights correspond one-to-one with the temperature probes. The controller is electrically connected to each of the warning lights and controls the warning lights to light up or change color according to the temperature signal input from the temperature probes.

[0011] Furthermore, a baffle is provided on the upper and lower sides of the feed end and discharge end of the cold rolling mill. The baffle is detachably fixed to the mill frame through a limiting groove. A sponge strip is provided between the contact surface of the baffle and the upper and lower work rolls. The sponge strip is used to absorb the coolant sprayed from the coolant pipe and evenly diffuse the coolant to the surface of the work rolls.

[0012] Furthermore, the first mounting bracket and the second mounting bracket are detachably fixed to the rolling mill frame via connecting hinges, and both the first mounting bracket and the second mounting bracket are equipped with casters at their bottoms.

[0013] The embodiments of this utility model have the following beneficial effects: This invention utilizes temperature probes to measure the temperature of the middle section of the roll body and the shoulders at both ends of the roll in real time. Each independent temperature probe has a warning light on its back. Two cooling devices are symmetrically arranged above and below the feed end of the mill. When the roll temperature exceeds the high-temperature threshold, the warning light illuminates. By rotating the handle to adjust the position of the coolant pipe, the atomizing nozzles located on the side of the coolant pipe can evenly spray the coolant onto the roll surface, enabling the roll to cool down quickly. When the roll temperature drops to the low-temperature threshold, the warning light changes color, and the atomizing nozzles stop spraying coolant. When the roll temperature is within the normal range, the warning light goes out, thus ensuring that the roll maintains a uniform operating temperature. Attached Figure Description

[0014] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the cooling device structure according to an embodiment of the present utility model; Figure 3 This is a simplified kinematic diagram of the cooling device according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the temperature measuring device according to an embodiment of the present invention; Figure 5 This is a cross-sectional view of an embodiment of the present utility model; Figure 6 This is a schematic diagram of the baffle installation according to an embodiment of the present utility model; The labels in the diagram represent the following: 1-Cold rolling mill; 2-Cooling device; 3-Temperature measuring device; 4-First mounting frame; 5-Second mounting frame; 6-Bearing seat; 7-Connecting hinge; 8-Wheel caster; 9-Baffle; 10-Limiting groove; 11-Sponge strip; 12-Warning light; 201-Motor; 202-Eccentric wheel; 203-Connecting rod; 204-Swing rod; 205-First bearing; 206-Positioning shaft; 207-Second bearing; 208-Coolant pipe; 301 - Mounting base; 302 - Temperature probe. Detailed Implementation

[0016] 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, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] During operation, cold rolling rolls continuously apply pressure to the strip, causing it to undergo plastic deformation. In the process of deformation, the strip converts mechanical energy into heat energy. At the same time, there is continuous friction between the rolls and the strip, as well as between the rolls themselves, generating a large amount of frictional heat. As the working time increases, the temperature of the rolls will continue to rise. If the rolls cannot be cooled in time, it will affect the rolling force of the rolls, and thus affect the product quality. If the rolls are cooled excessively, it will reduce the lubricating performance of the emulsion. It is difficult to achieve uniform temperature control of the rolls.

[0018] Reference Figure 1 and Figure 2 A temperature uniformity control device for cold rolling rolls, comprising: a first mounting frame 4, The cooling device 2 includes a coolant pipe 208 for spraying coolant, and a drive system for driving the coolant pipe 208 to perform circumferential oscillation so that the coolant pipe 208 can selectively spray coolant onto any one of the cold rolling rolls. The drive system includes two parallel and symmetrically arranged swing arms 204. One end of each swing arm 204 is fixedly connected to a coolant pipe 208. A positioning shaft 206 is perpendicularly connected to each swing arm 204. The two positioning shafts 206 are coaxially arranged and connected to the frame through a second bearing 207. The other end of the swing arm 204 is connected to an eccentric wheel 202 through a connecting rod 203. The connecting rod 203 is rotatably connected to the swing arm 204 and the eccentric wheel 202. The eccentric wheel 202 is connected to the first mounting bracket 4 through a first bearing 205. A motor 201 is driven to rotate the eccentric wheel 202 so that the coolant pipe 208 performs a circular swing.

[0019] By adopting the above scheme, the eccentric wheel 202 is driven to rotate by rotating the motor 201. According to the link length relationship of the four-bar linkage, the link length of the connecting rod 203 is much greater than the eccentricity of the eccentric wheel 202. The connecting rod 203 converts the circumferential rotation of the eccentric wheel 202 into a reciprocating circumferential oscillation, thereby driving the oscillating rod 204 to make a fixed-axis reciprocating circumferential oscillation around the axis of the positioning shaft 206. This enables the cooling range of the coolant pipe 208 to cover the sides of the work roller, intermediate roller and support roller, and the position of the coolant pipe 208 can be manually adjusted.

[0020] Reference Figure 3 When the rotation centers of the connecting rod 203 and the eccentric wheel 202 are collinear for the first time, the swing rod 204 is in the first position. When the rotation centers of the connecting rod 203 and the eccentric wheel 202 are collinear for the second time, the swing rod 204 is in the second position. When the swing rod 204 swings to its maximum angle, it is in the third position. The angle θ1 that the eccentric wheel 202 passes through when rotating counterclockwise from the first position to the second position is θ1, and the angle θ2 that the eccentric wheel 202 passes through when rotating counterclockwise from the second position to the third position is θ2, where θ1 > θ2. Under the condition that the eccentric wheel 202 rotates at a constant speed, the time required to pass through angle θ1 is greater than the time required to pass through angle θ2. The area between the angle between the first position and the second position is the working area of ​​the coolant pipe 208 on the work roll, and the area between the angle between the second position and the third position is the working area of ​​the coolant pipe 208 on the intermediate roll and the support roll, so that the speed of the coolant pipe 208 passing through the work roll is lower than the speed passing through other rolls.

[0021] Reference Figure 4 Furthermore, it also includes a temperature measuring device 3, which includes multiple mounting bases 301 corresponding to each cold rolling roll. Multiple temperature measuring probes 302 are provided on the mounting bases 301, and the multiple temperature measuring probes (302) are distributed along the axial direction of the cold rolling roll. The controller is electrically connected to the temperature probe 302 and the drive system. Based on the temperature signal transmitted by each temperature probe 302, it sends a working command to the drive system so that the coolant pipe 208 is directed toward the cold rolling roll whose temperature exceeds the high temperature threshold, or shuts off the atomizing nozzle after the roll temperature is lower than the low temperature threshold. The second mounting bracket 5 is used to fix the temperature measuring device 3.

[0022] Furthermore, the atomizing nozzles on the side of the coolant pipe 208 are arranged at unequal intervals, with the distance between two adjacent atomizing nozzles gradually decreasing from both ends to the middle. Each atomizing nozzle is equipped with an independent solenoid valve, and each solenoid valve is electrically connected to the controller.

[0023] The work roll 101 is affected by a variety of factors during operation. The middle section of the roll body has the largest contact area with the strip steel and generates the most frictional heat during rolling. The two sides of the roll shoulders have more contact with the air, resulting in more heat convection and a slower temperature rise rate compared to the roll body.

[0024] By adopting the above scheme, the atomizing nozzles on the side of the coolant pipe 208 gradually become denser from both ends to the middle, and different degrees of cooling are applied to different parts of the roll, so that the roll temperature can be kept consistent.

[0025] Furthermore, a plurality of warning lights 12 are provided on the other side of the mounting base 301 opposite to the rollers. The positions of the warning lights 12 correspond one-to-one with the temperature probes 302. The controller is electrically connected to each of the warning lights 12. The controller controls the warning lights 12 to light up or change color according to the temperature signal input from the temperature probes 302.

[0026] The warning light 12, the temperature probe 302, and the solenoid valve of the atomizing nozzle are electrically connected. When the temperature probe 302 detects that the temperature of the roll exceeds the high temperature threshold, the warning light 12 corresponding to the position of the temperature probe 302 lights up, and the atomizing nozzle at the corresponding position turns on. When the temperature probe 302 detects that the temperature of the roll drops to the low temperature threshold, the warning light 12 corresponding to the position of the temperature probe 302 changes color, and the atomizing nozzle at the corresponding position turns off.

[0027] The above solution can make the temperature of the work roll, intermediate roll and support roll uniform, avoiding the decrease in surface hardness and deformation resistance of the roll due to the increase in roll temperature, and also avoiding the increase in oil droplet size and reduced lubrication performance in the emulsion due to the roll temperature being too low.

[0028] Reference Figure 5 and Figure 6 A baffle 9 is provided on the upper and lower sides of the feed end and discharge end of the cold rolling mill 1. The baffle 9 is detachably fixed to the mill frame through the limiting groove 10. A sponge strip 11 is provided between the contact surface of the baffle 9 and the upper and lower working rolls. The sponge strip 11 is used to absorb the coolant sprayed from the coolant pipe 208 and spread the coolant evenly to the surface of the working rolls.

[0029] By adopting the above scheme, by adjusting the position of the baffle 9 in the limiting groove 10, the sponge strip 11 on the baffle 9 is made to just contact the surface of the work roll. When the atomizing nozzle sprays coolant onto the surface of the roll, the coolant droplets formed on the surface of the intermediate roll and the support roll fall directly onto the baffle 9. The coolant droplets formed on the surface of the work roll are scraped by the sponge strip 11 and evenly adhered to the surface of the work roll, which can effectively prevent coolant droplets from falling onto the surface of the strip and causing the strip to discolor.

[0030] Furthermore, the first mounting bracket 4 and the second mounting bracket 5 are detachably and fixedly connected to the rolling mill frame via connecting hinges 7, and both the first mounting bracket 4 and the second mounting bracket 5 are provided with casters 8 at their bottoms.

[0031] The above embodiments are merely exemplary embodiments of this utility model and are not intended to limit this utility model. The scope of protection of this utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this utility model within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered as falling within the scope of protection of this utility model.

Claims

1. A temperature uniformity control device for cold rolling rolls, used to cool each cold rolling roll of a cold rolling mill (1), characterized in that, The temperature homogenization control device includes: First mounting bracket (4) The cooling device (2) includes a coolant pipe (208) for spraying coolant and a drive system for driving the coolant pipe (208) to perform circumferential oscillation so that the coolant pipe (208) can selectively spray coolant onto any one of the cold rolling rolls; The drive system includes two swing arms (204) arranged parallel and symmetrically to each other. One end of each swing arm (204) is fixedly connected to a coolant pipe (208). A positioning shaft (206) is vertically connected to each swing arm (204). The two positioning shafts (206) are coaxially arranged and connected to the frame through a second bearing (207). The other end of the swing arm (204) is connected to an eccentric wheel (202) through a connecting rod (203). The connecting rod (203) is rotatably connected to the swing arm (204) and the eccentric wheel (202). The eccentric wheel (202) is connected to the first mounting bracket (4) through a first bearing (205). A motor (201) is connected to the eccentric wheel (202) and drives it to rotate so that the coolant pipe (208) performs a circular swing.

2. The temperature uniformity control device for cold rolling rolls according to claim 1, characterized in that, When the rotation centers of the connecting rod (203) and the eccentric wheel (202) are collinear for the first time, the swing rod (204) is in the first position. When the rotation centers of the connecting rod (203) and the eccentric wheel (202) are collinear for the second time, the swing rod (204) is in the second position. When the swing rod (204) swings to its maximum angle, it is in the third position. The angle θ1 traversed by the eccentric wheel (202) rotating counterclockwise from the first position to the second position is θ1. The angle θ1 traversed by the eccentric wheel (202) rotating counterclockwise from the second position is θ1. The angle θ2 is the distance to the third position, where θ1 > θ2. Under the condition that the eccentric wheel (202) rotates at a constant speed, the time required to pass through angle θ1 is greater than the time required to pass through angle θ2. The area between the angle between the first position and the second position is the working area of ​​the coolant pipe (208) on the work roll, and the area between the angle between the second position and the third position is the working area of ​​the coolant pipe (208) on the intermediate roll and the support roll, so that the speed of the coolant pipe (208) passing through the work roll is lower than the speed passing through other rolls.

3. The temperature uniformity control device for cold rolling rolls according to claim 1, characterized in that, Also includes: The temperature measuring device (3) includes multiple mounting bases (301) corresponding to each cold rolling roll, and multiple temperature measuring probes (302) are provided on the mounting bases (301). The multiple temperature measuring probes (302) are distributed along the axial direction of the cold rolling roll. The controller is electrically connected to the temperature probe (302) and the drive system. Based on the temperature signal transmitted by each temperature probe (302), it sends a working command to the drive system so that the coolant pipe (208) is directed toward the cold rolling roll whose temperature exceeds the high temperature threshold, or the atomizing nozzle is turned off after the roll temperature is lower than the low temperature threshold. The second mounting bracket (5) is used to fix the temperature measuring device (3).

4. The temperature uniformity control device for cold rolling rolls according to claim 3, characterized in that, The atomizing nozzles on the side of the coolant pipe (208) are arranged at unequal intervals, and the distance between two adjacent atomizing nozzles gradually decreases from both ends to the middle. Each atomizing nozzle is equipped with an independent solenoid valve, and each solenoid valve is electrically connected to the controller.

5. The temperature uniformity control device for cold rolling rolls according to claim 3, characterized in that, On the other side of the mounting base (301) opposite the roller, there are also a number of warning lights (12). The position of the warning lights (12) corresponds one-to-one with the temperature probe (302). The controller is electrically connected to each of the warning lights (12). The controller controls the warning lights (12) to light up or change color according to the temperature signal input by the temperature probe (302).

6. The temperature uniformity control device for cold rolling rolls according to claim 1, characterized in that, A baffle (9) is provided on the upper and lower sides of the feed end and discharge end of the cold rolling mill (1). The baffle (9) is detachably fixed to the mill frame through a limiting groove (10). A sponge strip (11) is provided between the contact surface of the baffle (9) and the upper and lower working rolls. The sponge strip (11) is used to absorb the coolant sprayed from the coolant pipe (208) and spread the coolant evenly to the surface of the working rolls.

7. The temperature uniformity control device for cold rolling rolls according to claim 4, characterized in that, The first mounting bracket (4) and the second mounting bracket (5) are detachably fixed to the mill frame via connecting hinges (7), and the bottom of the first mounting bracket (4) and the second mounting bracket (5) are provided with casters (8).

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