Method and auxiliary device for constructing a rolling hidden center line

Abstract

The application discloses a kind of methods and auxiliary devices for constructing rolling hidden center line, as method includes the following steps: 1) using laser tracker to measure rolling mill, find the rolling center line of rolling mill;2) determine the vertical line perpendicular to the rolling center line;3) in the entry side, exit side of rack, auxiliary device is respectively arranged;4) the base of fixed auxiliary device;5) make the line groove on center target coincide with the rolling center line;6) record each auxiliary device in its pointer is located at the scale of scale;7) with piano wire sequentially through each auxiliary device center target line groove and tighten piano wire, thereby to the rack is centered and calibrated.The application establishes stable rolling hidden center line, so that when the rolling mill is centered and calibrated, it is not necessary to measure the rolling center line again by laser instrument, so that the determination of rolling center line is more convenient, saves human resources, improves work efficiency, and guarantees safety production.

Description

Technical Field

[0001] This invention belongs to the field of metallurgical rolling technology, and particularly relates to a method and auxiliary device for constructing a hidden center line in rolling. Background Technology

[0002] During initial installation, rolling mill equipment typically relies on the rolling centerline for installation to ensure all equipment meets requirements. However, once installed, the original centerline is usually covered by the equipment. Experienced engineers embed permanent center points on the underside of the rolling mill. During operation, a total station is used to compare the coordinates of these permanent center points, and temporary measuring points are set at corresponding locations along the rolling line to verify equipment accuracy. However, these temporary measuring points are quickly damaged by the harsh production environment. Therefore, whenever mill accuracy needs calibration, determining the rolling centerline requires tedious, time-consuming, and inefficient work.

[0003] A Chinese patent specification (publication number CN112857265B) discloses a method for constructing the hidden point centerline of a rolling mill using a laser tracker, specifically disclosing the following: "The centerline of the rolling mill is laid out using a laser tracker and a theodolite in conjunction, control points are established, and during each measurement, the center marker on the drive side is transferred back using the theodolite for use by the laser tracker." This invention effectively solves the problem of establishing the center control point of the rolling mill, but its method is relatively cumbersome. Summary of the Invention

[0004] I. Technical problems to be solved

[0005] This invention proposes a method and auxiliary device for constructing a hidden center line of rolling mill. Its purpose is to establish a stable hidden center line of rolling mill so that when aligning and calibrating the rolling mill, it is not necessary to measure the center line of rolling mill again using a laser instrument.

[0006] II. Technical Solution

[0007] To achieve the above objectives, the present invention adopts the following technical solution.

[0008] As a method of the present invention, the rolling centerline is determined by fitting the measured values ​​of the centerline of each stand, and auxiliary devices are set on the inlet and outlet sides of each stand to memorize the centerline, thus avoiding the cumbersome procedure of using a laser instrument to calibrate the centerline each time. Specifically, it includes the following steps:

[0009] 1) After leveling and calibrating the laser tracker, use the laser tracker to measure the rolling mill and find the rolling center line AB of the rolling mill;

[0010] 2) Determine vertical lines CD and EF that are perpendicular to the rolling center line, wherein the vertical lines CD and EF are located on the entrance side and exit side of the stand, respectively;

[0011] 3) Install auxiliary devices on the entrance and exit sides of the rack respectively, and use the movable bracket in the auxiliary device as the alignment reference. The center extension line of the movable bracket of the auxiliary device located on the entrance side of the rack is parallel to the vertical line CD, and the center extension line of the movable bracket of the auxiliary device located on the exit side of the rack is parallel to the vertical line EF.

[0012] 4) Secure the base of the auxiliary device to the ground using bolts;

[0013] 5) Push the movable support to move on the slide rail via the slider, so that the groove on the center target coincides with the rolling center line AB;

[0014] 6) Record the position of the pointer on the scale for each auxiliary device;

[0015] 7) Pass piano wire through the wire groove of the center target of each auxiliary device in turn and tighten the piano wire to center and calibrate the frame;

[0016] 8) After calibration, remove the piano wires, retract the moving support, and move the center target away from the rolling channel.

[0017] The mill stands are multiple, including a finishing mill stand, a roughing mill stand I, a roughing mill stand II, and a side-press mill stand.

[0018] As an auxiliary device of the present invention, it includes:

[0019] The movable bracket and slide rail are provided. The upper part of the front end of the movable bracket is connected to a center target by screws, and the lower part of the rear end of the movable bracket is connected to a slider by bolts. The side of the slider is connected to a pointer, and the slider is slidably connected to the slide rail. The upper part of the slide rail is connected to a ruler, and the lower part of the slide rail is connected to a base. The base is connected to the ground by bolts.

[0020] The scale has graduations.

[0021] III. Beneficial Effects

[0022] This invention provides a method and auxiliary device for constructing a hidden center line for rolling. By establishing a stable hidden center line, it eliminates the need to measure the rolling center line again using a laser instrument when aligning the rolling mill. This makes determining the rolling center line more convenient, saves manpower, improves work efficiency, and ensures safe production. Attached Figure Description

[0023] Figure 1 This is a top view of the device layout of the present invention.

[0024] Figure 2 This is a three-dimensional structural diagram of the auxiliary device of the present invention.

[0025] Figure 3 yes Figure 2 A magnified schematic diagram of part A.

[0026] Figure 4 yes Figure 2 A magnified schematic diagram of part B. Detailed Implementation

[0027] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can understand them more clearly.

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the method of the present invention specifically includes the following steps:

[0029] 1) After leveling and calibrating the laser tracker, use the laser tracker to measure the rolling mill and find the rolling center line AB of the rolling mill;

[0030] 2) Determine vertical lines CD and EF that are perpendicular to the rolling center line, wherein the vertical lines CD and EF are located on the entrance side and exit side of the stand, respectively;

[0031] 3) Install auxiliary devices 1 on the entrance and exit sides of the rack respectively, and use the movable support 11 in the auxiliary device as the alignment reference. The center extension line of the movable support of the auxiliary device located on the entrance side of the rack is parallel to the vertical line CD, and the center extension line of the movable support of the auxiliary device located on the exit side of the rack is parallel to the vertical line EF.

[0032] 4) Secure the base 12 of the auxiliary device to the ground using bolts;

[0033] 5) Push the movable support to move on the slide rail 14 via the slider 13, so that the groove 16 on the center target 15 coincides with the rolling center line AB;

[0034] 6) Record the position of pointer 17 on scale 18 for each auxiliary device;

[0035] 7) Pass piano wire through the wire groove of the center target of each auxiliary device in turn and tighten the piano wire to center and calibrate the frame;

[0036] 8) After calibration, remove the piano wires, retract the moving support, and move the center target away from the rolling channel.

[0037] The stands in this embodiment include finishing mill stands F1, F2, F3, F4, F5, F6, F7, roughing mill stand ⅠR1, roughing mill stand ⅡR2, and side-pressing mill stand R3.

[0038] like Figure 2 , Figure 3 , Figure 4 As shown, as an auxiliary device of the present invention, it includes:

[0039] The movable support 11 and the slide rail 14 are connected by screws to the upper part of the front end of the movable support and bolts to the lower part of the rear end of the movable support. The slider 13 is connected to the side of the slider and the pointer 17 is connected to the slider. The slider is slidably connected to the slide rail. The upper part of the slide rail is connected to the scale 18 and the lower part of the slide rail is connected to the base 12. The base is connected to the ground by bolts.

[0040] Furthermore, the scale has graduations.

[0041] When it is necessary to recalibrate the rolling centerline, simply push the moving bracket of each auxiliary device to move on the slide rail 14, and according to the recorded data, restore the scale 18 corresponding to the pointer 17 in each auxiliary device to the recorded data; pass the piano wire through the groove of the center target of each auxiliary device in sequence and tighten the piano wire to calibrate the frame.

[0042] This invention provides a method and auxiliary device for constructing a hidden center line for rolling. By establishing a stable hidden center line, it eliminates the need to measure the rolling center line again using a laser instrument when aligning the rolling mill. This makes determining the rolling center line more convenient, saves manpower, improves work efficiency, and ensures safe production.

Claims

1. A method for constructing a hidden centerline in rolling, characterized in that, By fitting the measured values ​​of the centerline of each stand, the rolling centerline AB is determined. Auxiliary devices are installed on the inlet and outlet sides of each stand to memorize the centerline of each stand, avoiding the cumbersome procedure of using a laser instrument to calibrate the rolling centerline AB each time. The specific steps include: 1) After leveling and calibrating the laser tracker, use the laser tracker to measure the rolling mill and find the rolling center line AB of the rolling mill; 2) Determine vertical lines CD and EF that are perpendicular to the rolling center line AB. The vertical lines CD and EF are located on the entrance side and exit side of the stand, respectively. 3) Install auxiliary devices (1) on the entrance and exit sides of the rack respectively, and use the movable support (11) in the auxiliary device as the alignment reference. The center extension line of the movable support of the auxiliary device located on the entrance side of the rack is parallel to the vertical line CD, and the center extension line of the movable support of the auxiliary device located on the exit side of the rack is parallel to the vertical line EF. 4) Secure the base (12) of the auxiliary device to the ground using bolts; 5) Push the movable support to move on the slide rail (14) via the slider (13) so that the groove (16) on the center target (15) coincides with the rolling center line AB; 6) Record the position of the pointer (17) on the scale (18) of each auxiliary device; 7) Pass piano wire through the wire groove of the center target of each auxiliary device in turn and tighten the piano wire to center and calibrate the frame; 8) After calibration, remove the piano wires, retract the moving support, and move the center target away from the rolling channel.

2. The method according to claim 1, characterized in that: The mill stands are multiple, including finishing mill stands (F1, F2, F3, F4, F5, F6, F7), roughing mill stand I (R1), roughing mill stand II (R2), and side-pressing mill stand (R3).

3. An auxiliary device for constructing a hidden centerline of rolling, the auxiliary device (1) being used in the method for constructing a hidden centerline of rolling as described in claim 1, characterized in that: It includes a movable bracket (11) and a slide rail (14). The upper part of the front end of the movable bracket is connected to a central target (15) by a screw, and the lower part of the rear end of the movable bracket is connected to a slider (13) by a bolt. The side of the slider is connected to a pointer (17), and the slider is slidably connected to the slide rail. The upper part of the slide rail is connected to a ruler (18), and the lower part of the slide rail is connected to a base (12).

4. The auxiliary device according to claim 3, characterized in that: The scale has graduations.

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