A grinding device for a pair of rolls and a method thereof

Abstract

The application relates to a grinding method and device for matched rollers, which comprises a bottom plate, left and right sides of the upper end of the bottom plate are fixedly connected with supports, a connecting port is arranged in the middle part of the support, a transmission mechanism is fixedly connected in the inside of the connecting port through bolts, a connecting shell is fixedly connected at the lower end of the left side of the upper end of the bottom plate, a transmission motor is fixedly connected in the inside of the connecting shell, a receiving ring groove is arranged on the right side of the outside of the connecting shell, and a clamp is fixedly connected at the lower end of the right side of the upper end of the bottom plate through a support rod. The device can reduce the accumulated roller shape deviation of each roller in separate grinding, improve the roller gap uniformity of the matched rollers, improve the plate shape control precision and surface quality of the strip steel, and reduce the grinding time and grinding amount of the rollers under the premise of meeting the same roller target roller shape tolerance range, improve the grinding efficiency of the rollers, and reduce the production cost of enterprises.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of roll machining, in particular to a grinding device for paired rolls and a method thereof. BACKGROUND

[0002] On a hot rolling or cold rolling production line, the thickness of a slab is reduced by the rolling action of a rolling mill, and finally reaches the required finished product thickness. The roll system in the rolling mill stand is composed of multiple groups of vertically arranged paired rolls, generally four or six rolls. In addition, the load roll gap composed of paired work rolls directly contacting the strip directly affects the strip shape and transverse thickness accuracy and the surface quality of the strip. After a certain period of use, the surface of the roll will form a fatigue layer due to work hardening, and the roll surface will be affected by quality defects such as indentation and scratches, and the roll needs to be ground again before it can be used normally again. Considering the special requirements of different rolling mill models and rolled strips, the roll is usually designed into different roll profile contours and pre-stored in the computer to form a standard roll target profile curve. However, due to the influence of factors such as the width of the grinding wheel used during grinding, the precision of the grinding machine itself, and the grinding process, the roll cannot completely reach the target profile curve, so a tolerance range that can meet the actual production needs on site needs to be set.

[0003] Generally, in the normal grinding process of the roll, each roll is ground according to the set target profile curve until the actual profile of the roll meets the allowed tolerance range, and the grinding of the roll is completed before it can be used on the machine. However, for paired rolls, since each roll has a certain degree of profile deviation after grinding, the cumulative deviation will cause uneven gaps between the paired rolls, thereby affecting the grinding roll consumption of the roll and the product quality of the rolled strip, so we propose a grinding device for paired rolls and a method thereof. SUMMARY

[0004] The application provides a grinding device for paired rolls and a method thereof to solve the problem that for paired rolls, since each roll has a certain degree of profile deviation after grinding, the cumulative deviation will cause uneven gaps between the paired rolls, thereby affecting the grinding roll consumption of the roll and the product quality of the rolled strip.

[0005] The application provides a grinding device for paired rolls, which comprises:

[0006] A bottom plate, the upper ends of the left and right sides of the bottom plate are fixedly connected with supports, a connecting port is formed in the middle of the support, and a transmission mechanism is fixedly connected inside the connecting port through bolts;

[0007] A connecting housing is fixedly connected to the upper left end of the bottom plate, and a transmission motor is fixedly connected inside the connecting housing, and a receiving ring groove is formed on the right outer part of the connecting housing;

[0008] A clamp is fixedly connected to the upper right end of the bottom plate through a support rod, a rolling roller is fixedly positioned between the left end of the clamp and the right end of the transmission shaft of the transmission motor, and a measuring ring is movably sleeved on the outer side of the rolling roller.

[0009] Preferably, the transmission mechanism comprises a connecting housing, a displacement cavity, a transmission block, a transmission screw rod and a driving motor, the connecting housing is fixedly connected inside the connecting port, a displacement cavity is formed in the middle of the lower side of the connecting housing, the transmission block is movably inserted into the displacement cavity, the middle of the upper side of the transmission block is threadedly inserted with the transmission screw rod, and the right end of the transmission screw rod is fixedly connected with the driving motor.

[0010] Preferably, the driving motor is fixedly connected to the upper right end of the connecting housing, and the front and rear side walls of the transmission block slide with the front and rear side walls of the displacement cavity.

[0011] Preferably, the lower end of the transmission block is fixedly connected with a connecting plate, the lower end of the connecting plate is fixedly connected with a first protective housing through bolts, the first protective housing is fixedly connected with a first electric telescopic rod inside, the transmission rod of the first electric telescopic rod is fixedly connected with a second protective housing at the lower end, the second protective housing is fixedly connected with a grinding motor inside, and the rotating shaft of the grinding motor is fixedly connected with a grinding wheel.

[0012] Preferably, the upper end of the second protective housing is fixedly connected with a limiting sliding rod on the left and right sides, and the limiting sliding rod is movably inserted into the inside of the first protective housing.

[0013] Preferably, a plurality of scanning sampling heads are fixedly connected in an annular array on the inner side of the measuring ring, a plurality of blowing fans are fixedly inlaid in an annular array on the right side of the measuring ring, the blowing fans have an angle with the horizontal plane, the plurality of scanning sampling heads are connected with a remote computer through wireless transmission, and the remote computer is connected with a control device and a display through wires.

[0014] Preferably, a connecting block is fixedly connected to the upper end of the measuring ring, the left end of the connecting block is fixedly connected with the transmission rod of a second electric telescopic rod, and the left end of the second electric telescopic rod is fixedly connected to the left side of the support.

[0015] Preferably, a rectangular receiving port is formed on the left upper end of the receiving ring groove.

[0016] The embodiment of the application also provides a grinding method for a pair of rolling rollers, comprising the grinding device for a pair of rolling rollers described in any one of the above embodiments, and comprising the following steps:

[0017] Step 1, the target roll shape curve and its tolerance range of the first roll and the second roll of the matched rolls are stored in the remote computer, and the actual roll shape curve of the first roll is measured in real time by the scanning sampling head;

[0018] Step 2, the first roll is ground until the actual roll shape profile meets the tolerance range of the target roll shape, and the deviation curve of the actual roll shape profile of the first roll from the target roll shape is calculated;

[0019] Step 3, the roll shape deviation curve of the first roll is sent to the target roll shape curve and the tolerance range of the second roll, and the target roll shape curve of the second roll is corrected according to the roll shape deviation curve of the first roll;

[0020] Step 4, the second roll is ground and the roll shape profile is measured in real time until the target roll shape tolerance range of the second roll is met, and the minimum roll gap deviation of the matched rolls is realized.

[0021] Preferably, the receiving ring groove and the rectangular receiving port are combined to receive the measuring ring and the connecting block.

[0022] The above technical solutions provided by the embodiments of the present application have the following advantages compared with the prior art:

[0023] The device provided by the embodiments of the present application can reduce the accumulated roll shape deviation of each roll ground separately, improve the uniformity of the roll gap of the matched rolls, thereby improving the plate shape control precision and surface quality of the strip steel, and can also reduce the grinding time and grinding amount of the rolls under the premise of meeting the same roll target roll shape tolerance range, improve the grinding efficiency of the rolls, and reduce the production cost of the enterprise. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which are incorporated into and form part of the specification, illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the application.

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0026] Figure 1 The overall structure of a grinding device for matched rolls provided by the embodiments of the present application;

[0027] Figure 2 The overall structure of a grinding device for matched rolls provided by the embodiments of the present application;

[0028] Figure 3 A grinding device for paired rollers Figure 1 Enlarged view of A in the figure;

[0029] Figure 4 Left view sectional view of a measuring ring of a grinding device for paired rollers provided by the embodiment of the present application;

[0030] Figure 5 Front view sectional view of a measuring ring of a grinding device for paired rollers provided by the embodiment of the present application;

[0031] Figure 6 Flow chart of a grinding method of a grinding device for paired rollers provided by the embodiment of the present application.

[0032] In the figure: 1, base plate; 2, support; 3, connecting shell; 4, first protective shell; 5, second protective shell; 6, grinding wheel; 7, connecting shell; 8, transmission motor; 9, transmission motor; 10, roller; 11, clamp; 12, measuring ring; 13, connecting block; 14, second electric telescopic rod; 15, driving motor; 16, blowing fan; 17, scanning sampling head; 18, transmission screw; 19, displacement cavity; 20, transmission block; 21, limiting slide rod; 22, first electric telescopic rod; 23, polishing motor; 24, rectangular receiving opening. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application.

[0034] Various embodiments of the present application can exist in the form of a range. It should be understood that the description in the form of a range is merely for the convenience and brevity, and should not be understood as a hard restriction on the scope of the present application; therefore, it should be considered that the described range description has specifically disclosed all possible sub-ranges and single values within the range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the described range, such as 1, 2, 3, 4, 5 and 6, regardless of the range. In addition, whenever a numerical range is indicated in the present application, it refers to any cited number (fraction or integer) within the indicated range. Unless otherwise specified, various raw materials, reagents, instruments and equipment, etc. used in the present application can be purchased from the market or can be prepared by existing equipment.

[0035] In the present application, the orientation words such as "upper" and "lower" are specifically the directions of the drawing surface in the drawings unless otherwise stated. In addition, in the present application, the terms "include", "contain" and the like mean "include but not limited to". In the present application, the relationship terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. In the present application, "and / or" describes the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can represent the cases of A alone, A and B together, and B alone. Wherein A and B can be singular or plural. In the present application, "at least one" means one or more, and "multiple" means two or more. "At least one", "at least one of the following" or the like means any combination of the items, including any combination of single or multiple items. For example, "at least one of a, b, or c", or "at least one of a, b, and c" can represent a, b, c, a-b, that is, a and b, a-c, b-c, or a-b-c, where a, b, and c can be single or multiple.

[0036] As shown in Figures 1 to 5 The grinding device for matching rolls provided by the embodiment of the present application comprises:

[0037] A bottom plate 1, the upper ends of left and right sides of the bottom plate 1 are fixedly connected with supports 2, the middle part of each support 2 is provided with a connecting hole, and the inside of the connecting hole is fixedly connected with a transmission mechanism through a bolt;

[0038] A connecting shell 7, the lower end of the connecting shell 7 is fixedly connected to the upper end of the left side of the bottom plate 1, the inside of the connecting shell 7 is fixedly connected with a transmission motor 8, and the right side of the outside of the connecting shell 7 is provided with a receiving ring groove 9;

[0039] A clamp 11, the lower end of the clamp 11 is fixedly connected to the upper end of the right side of the bottom plate 1 through a support rod, a roll 10 is fixedly positioned between the left end of the clamp 11 and the right end of the transmission shaft of the transmission motor 8, and a measuring ring 12 is movably sleeved on the outside of the roll 10.

[0040] Specifically, the transmission motor 8 is an existing motor on the market, which is prior art and will not be described here. The measuring ring 12 can be displaced left and right under the driving of the second electric telescopic rod 14, so as to collect the external profile of the roll 10 through the scanning sampling head 17, and transmit it to the modeling software built in the external computer to determine whether the polishing of the roll 10 is qualified.

[0041] Reference Figure 1 andFigure 2 As shown in the figure: the transmission mechanism comprises a connecting shell 3, a displacement cavity 19, a transmission block 20, a transmission screw rod 18 and a drive motor 15, the connecting shell 3 is fixedly connected inside the connecting port, and the lower middle part of the connecting shell 3 is provided with the displacement cavity 19, and the inside of the displacement cavity 19 is movably inserted with the transmission block 20, the upper middle part of the transmission block 20 is inserted with the transmission screw rod 18 through threads, and the right end of the transmission screw rod 18 is fixedly connected with the drive motor 15.

[0042] Specifically: the drive motor 15 adopts the existing motor in the market, which is a prior art and will not be described here again. The forward and reverse rotation of the drive motor 15 can drive the transmission screw rod 18 to rotate forward and reverse, and drive the transmission block 20 to rotate forward and reverse.

[0043] Reference Figure 2 As shown in the figure: the drive motor 15 is fixedly connected to the right end of the upper part of the connecting shell 3, and the front and rear side walls of the transmission block 20 slide with the front and rear side walls of the displacement cavity 19.

[0044] Specifically: the transmission block 20 is limited by the front and rear side walls of the displacement cavity 19, and is driven to displace left and right by threads under the rotation of the transmission screw rod 18, and the front and rear side walls of the transmission block 20 and the front and rear side walls of the displacement cavity 19 are smooth.

[0045] Reference Figure 2 As shown in the figure: the lower end of the transmission block 20 is fixedly connected with a connecting plate, and the lower end of the connecting plate is fixedly connected with a first protective shell 4 through bolts, and the inside of the first protective shell 4 is fixedly connected with a first electric telescopic rod 22, and the transmission rod lower end of the first electric telescopic rod 22 is fixedly connected with a second protective shell 5, the inside of the second protective shell 5 is fixedly connected with a polishing motor 23, and the rotating shaft of the polishing motor 23 is fixedly connected with a grinding wheel 6.

[0046] Specifically, the first electric telescopic rod 22 adopts the existing telescopic rod in the market, and the polishing motor 23 uses the existing motor in the market, which is a prior art and will not be described here again. The first electric telescopic rod 22 is used to drive the second protective shell 5 to displace up and down, so that the polishing motor 23 and the grinding wheel 6 displace up and down, thereby changing the surface thickness of the grinding wheel 6 polishing the roller 10, and the left and right displacement of the transmission block 20 drives the first protective shell 4, the polishing motor 23 and the grinding wheel 6 to displace left and right, thereby changing the surface position of the grinding wheel 6 polishing the roller 10.

[0047] Reference Figure 2 As shown in the figure: the upper end of the second protective shell 5 is fixedly connected with a limiting slide rod 21 on the left and right sides, and the limiting slide rod 21 is movably inserted into the inside of the first protective shell 4.

[0048] Specifically: the limiting slide rod 21 can make the second protective shell 5 displace up and down more stably.

[0049] Reference Figure 4 And Figure 5 As shown in the figure: the inner side of the measuring ring 12 is fixedly connected with a plurality of scanning sampling heads 17 in a ring array, and the right side of the measuring ring 12 is fixedly inlaid with a plurality of blowing fans 16 in a ring array, and the blowing fans 16 have an angle with the horizontal plane. A plurality of scanning sampling heads 17 are connected to a remote computer through wireless transmission. The remote computer is connected to a control device and a display through wires.

[0050] Specifically: the blowing fan 16 has a 45-degree angle with the horizontal plane, the scanning sampling head 17 adopts the existing modeling sampling scanning head on the market, and the surface of the roller 10 is sampled through multiple angles, so that the sampling of the roller 10 is more accurate after shaping, the blowing fan 16 adopts the existing small fan on the market, which is connected in series, and the blowing fan 16 can start working after the measuring ring 12 is displaced out of the storage ring groove 9, so as to blow away the debris polished by the roller 10, avoid a large amount of debris falling to the inside of the measuring ring 12, and affect the sampling of the scanning sampling head 17. The remote computer, the control device and the display all adopt the existing equipment on the market, which is the prior art. The remote computer has a data processing program inside the structure, which can process the data collected by the scanning sampling head 17. The control device is a device for controlling the remote computer, and the display is used to display the processed data.

[0051] Reference Figure 5 As shown in the figure: the upper end of the measuring ring 12 is fixedly connected with a connecting block 13, the left end of the connecting block 13 is fixedly connected with the transmission rod of the second electric telescopic rod 14, and the left end of the second electric telescopic rod 14 is fixedly connected to the left side of the bracket 2. The upper left side of the storage ring groove 9 is provided with a rectangular storage opening 24, and the space combined by the storage ring groove 9 and the rectangular storage opening 24 stores the measuring ring 12 and the connecting block 13.

[0052] When the measuring ring 12 works, the second protective shell 5 is displaced to the right of the roller 10, so as not to affect the work of the measuring ring 12, and after the measuring ring 12 finishes work, the second electric telescopic rod 14 will drive the measuring ring 12 to displace leftward and be stored in the inside of the storage ring groove 9, so as to effectively protect the measuring ring 12.

[0053] When the device is in use, the roll 10 is hoisted to the overall grinding machine, that is, fixed between the left end of the clamp 11 and the right end of the transmission shaft of the transmission motor 8, and then the roll 10 and the roll 10 grinding process data are read, including the absolute diameter or relative diameter of the roll 10, the target roll shape curve and the tolerance range, the roll 10 out-of-roundness tolerance range, the roll 10 surface roughness and the tolerance range, the roll 10 surface quality and the like. After that, the second electric telescopic rod 14 drives the measuring ring 12 to displace rightward to measure the actual roll shape profile of the roll 10 and calibrate. After the measurement is completed, the measuring ring 12 returns to the initial position, that is, is stored in the inside of the storage ring groove 9. After that, the transmission mechanism and the polishing motor 23 are started to remove the surface fatigue layer of the roll 10 by rough grinding and fast grinding. Then, the roll shape profile is ground by semi-fine grinding, and the actual roll shape profile is measured again by the measuring ring 12 in real time until the tolerance range of the target roll shape curve is met. Then, the required roughness and surface quality of the roll 10 are reached by fine grinding. Finally, the out-of-roundness of the finished roll, the actual roll shape and the roll shape deviation of the roll are measured by the measuring ring 12, and the roll is hoisted out of the grinding machine after being qualified.

[0054] In the determination of two rolls 10 as a matched pair of rolls, the diameters of the rolls 10 are generally not more than 0.5 mm. The roll 10 with a relatively small diameter is selected as the first roll 10 to be ground according to the grinding standard process, and the roll shape profile deviation curve of the first roll 10 after grinding is completed is saved. The roll shape profile deviation curve of the first roll 10 is sent to the target curve of the second roll 10 for correction until the actual roll shape profile of the second roll 10 meets the tolerance range of the target roll shape curve.

[0055] In the same grinding time, the above method can achieve more uniform roll gap of the roll 10 when each roll is matched and used on the machine after being ground separately, or the grinding time of the roll 10 can be shortened when the roll shape deviation of the roll 10 is within the tolerance range.

[0056] According to Figure 6 It is shown that the embodiment of the application also provides a grinding method for a matched pair of rolls, which comprises the grinding device for a matched pair of rolls according to any one of the above embodiments, and comprises the following steps:

[0057] Step 1, the target roll shape curve and the tolerance range of the first roll 10 and the second roll 10 in the matched pair of rolls are stored in the remote computer, and the actual roll shape curve of the first roll 10 is measured in real time by the scanning sampling head 17;

[0058] Step 2, the first roll 10 is ground until the actual roll shape profile meets the tolerance range of the target roll shape, and the deviation curve of the actual roll shape profile of the first roll 10 from the target roll shape is calculated;

[0059] Step 3, send the roll shape deviation curve of the first roll 10 to the target roll shape curve and tolerance range of the second roll 10, and correct the target roll shape curve of the second roll according to the roll shape deviation curve of the first roll 10;

[0060] Step 4, grind the second roll 10 and measure the roll shape profile of the roll 10 in real time until the target roll shape tolerance range of the second roll 10 is met, so as to realize the minimum roll gap deviation of the paired rolls 10.

[0061] Specifically: (1) In the roll grinding remote computer control device, the target roll shape curve of the roll 10 and the allowed tolerance range thereof for different rolling mill groups and rolling mill stands are pre-stored. When the first roll 10 of the paired roll 10 needs to be ground, the target roll shape curve of the roll 10 and the tolerance range information thereof are sent to the grinding machine program of the overall structure.

[0062] (2) The first roll 10 of the paired roll is ground according to the target roll shape curve of the roll 10, and the actual roll shape profile of the roll 10 is detected in real time through the scanning sampling head 17 until the actual roll shape profile of the roll 10 meets the tolerance range of the target roll shape curve of the roll 10. At the same time, the actual roll shape profile curve of the first roll 10 is returned and sent to the remote computer device.

[0063] (3) The remote computer device compares the returned actual roll shape profile of the first roll 10 with the target roll shape curve to obtain the roll shape profile deviation curve of the first roll 10 along the transverse direction of the roll body, and sends the deviation curve to the pre-stored target roll shape curve of the second roll 10 of the paired roll and the allowed tolerance range thereof in the computer.

[0064] (4) The target roll shape curve of the second roll 10 is corrected according to the roll shape deviation curve of the first roll 10 in the actual grinding process, and then the second roll 10 is ground, so as to ensure that the paired rolls have relatively uniform roll gap along the transverse direction of the roll body after all grinding is completed.

[0065] The above is only a specific embodiment of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined in the present application can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown in the present application, but will conform to the widest scope consistent with the principles and novel features applied for in the present application.

Claims

1. A grinding device for pairing rolls, characterized in that, Include: The upper end of the bottom plate (1) is fixedly connected with a support (2) on the left and right sides, and the middle part of the support (2) is provided with a connecting port, and the inside of the connecting port is fixedly connected with a transmission mechanism through a bolt; The lower end of the connecting shell (7) is fixedly connected to the upper end of the bottom plate (1) on the left side, and the inside of the connecting shell (7) is fixedly connected with a transmission motor (8), and the right outer part of the connecting shell (7) is provided with a receiving ring groove (9); The lower end of the clamp (11) is fixedly connected to the upper end of the bottom plate (1) on the right side through a support rod, and a rolling mill (10) is fixedly positioned between the left end of the clamp (11) and the right end of the transmission shaft of the transmission motor (8), and the outer side of the rolling mill (10) is movably sleeved with a measuring ring (12); The transmission mechanism comprises a connecting shell (3), a displacement cavity (19), a transmission block (20), a transmission screw (18) and a drive motor (15), the connecting shell (3) is fixedly connected to the inside of the connecting port, and the lower side of the connecting shell (3) is provided with a displacement cavity (19) in the middle part, and the inside of the displacement cavity (19) is movably inserted with a transmission block (20), the upper side of the transmission block (20) is movably inserted with a transmission screw (18) through a threaded connection, and the right end of the transmission screw (18) is fixedly connected with a drive motor (15); The drive motor (15) is fixedly connected to the upper part of the right end of the connecting shell (3), and the front and rear side walls of the transmission block (20) slide with the front and rear side walls of the displacement cavity (19); The lower end of the transmission block (20) is fixedly connected with a connecting plate, and the lower end of the connecting plate is fixedly connected with a first protective shell (4) through a bolt, and the inside of the first protective shell (4) is fixedly connected with a first electric telescopic rod (22), and the transmission rod of the first electric telescopic rod (22) is fixedly connected with a second protective shell (5), the inside of the second protective shell (5) is fixedly connected with a polishing motor (23), and the shaft of the polishing motor (23) is fixedly connected with a grinding wheel (6); The upper end of the second protective shell (5) is fixedly connected with a limiting slide rod (21) on the left and right sides, and the limiting slide rod (21) is movably inserted into the inside of the first protective shell (4); The inside of the measuring ring (12) is fixedly connected with a plurality of scanning sampling heads (17) in an annular array, and the right part of the measuring ring (12) is fixedly embedded with a plurality of blowing fans (16) in an annular array, and the blowing fans (16) and the horizontal plane have an angle, a plurality of the scanning sampling heads (17) are connected to a remote computer through wireless transmission, and the remote computer is connected to a control device and a display through wires; The upper end of the measuring ring (12) is fixedly connected with a connecting block (13), the left end of the connecting block (13) is fixedly connected with the transmission rod of a second electric telescopic rod (14), and the left end of the second electric telescopic rod (14) is fixedly connected to the left side of the support (2); The upper end of the receiving ring groove (9) is provided with a rectangular receiving port (24) on the left side; The receiving ring groove (9) and the rectangular receiving port (24) combine to receive the measuring ring (12) and the connecting block (13).

2. A grinding method of a pair of rolls, characterized by, The grinding device for a pair of rolls as claimed in claim 1, comprising the following steps: Step 1, storing the target roll shape curve and its tolerance range of the first roll (10) and the second roll (10) in the remote computer, and measuring the actual roll shape curve of the first roll (10) in real time by the scanning sampling head (17); Step 2, grinding the first roll (10) until the actual roll shape curve meets the tolerance range of the target roll shape, and calculating the deviation curve of the actual roll shape curve of the first roll (10) from the target roll shape; Step 3, sending the roll shape deviation curve of the first roll (10) to the target roll shape curve and the tolerance range of the second roll (10), and correcting the target roll shape curve of the second roll according to the roll shape deviation curve of the first roll (10); Step 4, grinding the second roll (10) and measuring the roll shape curve of the roll (10) in real time until the target roll shape tolerance range of the second roll (10) is met, thereby realizing the minimum roll gap deviation of the pair of rolls (10).

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