Positioning Method for Unloading the Rolling Mill Stand

Abstract

The present invention provides a positioning method for unloading a rolling mill housing, and the method includes the following steps: an auxiliary center line setting step of setting an auxiliary center line at a first preset distance from a preset unloading center line, with the auxiliary center line being parallel to the unloading center line; a housing stop line determination step of determining a housing stop line according to a preset unloading position of the rolling mill housing; a reverse driving step of reversing the transport vehicle to the preset unloading position according to the housing stop line and the auxiliary center line; a detection step of detecting whether the center line of the rolling mill housing coincides with the unloading center line according to the auxiliary center line; and an adjustment step of adjusting the position of the transport vehicle if they do not coincide until the center line of the rolling mill housing coincides with the unloading center line, and then stopping the adjustment. The present invention realizes the precise positioning of the center line of the rolling mill housing, provides a guiding basis for the adjustment of the unloading position of the rolling mill housing, and effectively ensures that the unloading center line coincides with the center line of the rolling mill housing.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment installation, and more particularly, to a positioning method for unloading a rolling mill housing. Background Art

[0002] When a special device is used to hoist an extra-large rolling mill housing, the unloading position of the rolling mill is the starting position of installation, and no adjustment can be made after unloading. Therefore, during unloading, the transport axis vehicle needs to stop the rolling mill housing at a specific position according to the unloading center line and position requirements, and ensure that the unloading center line coincides with the center line of the rolling mill housing. However, when loading the rolling mill housing onto the vehicle, it is difficult to ensure that the center line of the rolling mill housing coincides with the center line of the vehicle. During unloading, the traditional method is difficult to accurately position the center line of the rolling mill housing, and it cannot provide a guiding basis for the position adjustment during vehicle unloading, and thus cannot ensure that the unloading center line coincides with the center line of the rolling mill housing. Summary of the Invention

[0003] In view of this, the present invention provides a positioning method for unloading a rolling mill housing, aiming to solve the problem that the prior art cannot accurately position the center line of the rolling mill housing during unloading.

[0004] The present invention provides a positioning method for unloading a rolling mill housing, which includes the following steps: an auxiliary center line setting step of setting an auxiliary center line at a first preset distance from a pre-set unloading center line, the auxiliary center line being parallel to the unloading center line; a housing stop line determination step of determining a housing stop line according to the preset unloading position of the rolling mill housing; a reverse driving step of reversing the transport vehicle to the preset unloading position according to the housing stop line and the auxiliary center line; a detection step of detecting whether the center line of the rolling mill housing coincides with the unloading center line according to the auxiliary center line; and an adjustment step of adjusting the position of the transport vehicle if they do not coincide until the center line of the rolling mill housing coincides with the unloading center line, and then stopping the adjustment.

[0005] Further, in the reverse driving step of the above positioning method for unloading a rolling mill housing, when the rear of the transport vehicle is aligned with the housing stop line, reverse driving is stopped.

[0006] Further, in the above positioning method for unloading a rolling mill housing, the detection step further includes: a selection sub-step of selecting two reference points on the top surface of the housing, the two reference points being on the same straight line; a measurement sub-step of measuring the actual distance between each reference point and the auxiliary center line; and a comparison sub-step of comparing the measured actual distance between each reference point and the auxiliary center line with the theoretical distance respectively to detect whether the center line of the rolling mill housing coincides with the unloading center line.

[0007] Further, in the above positioning method for unloading the rolling mill housing, in the selection sub-step, two reference points are spaced apart on the top surface of the housing and at a second preset distance from the side machining surface of the rolling mill housing. The two reference points are on the same straight line, and one of the reference points corresponds to the position of the lifting fixture of the rolling mill housing.

[0008] Further, in the above positioning method for unloading the rolling mill housing, in the comparison sub-step, the theoretical distance is the sum of the design distance between the side machining surface of the rolling mill housing and the auxiliary center line and the second preset distance.

[0009] Further, in the above positioning method for unloading the rolling mill housing, in the comparison sub-step, if the actual distance between each measured reference point and the auxiliary center line is equal to the theoretical distance, it is determined that the center line of the rolling mill housing coincides with the unloading center line; if the actual distance between at least one measured reference point and the auxiliary center line is not equal to the theoretical distance, it is determined that the center line of the rolling mill housing does not coincide with the unloading center line.

[0010] Further, in the above positioning method for unloading the rolling mill housing, the adjustment step further includes: a driving-away sub-step of driving the transport vehicle away from the preset unloading position; a position reference line determination sub-step of determining the side position reference line of the rolling mill housing according to the auxiliary center line; an adjusting vehicle sub-step of backing the transport vehicle to the preset unloading position and adjusting the position of the transport vehicle according to the side position reference line of the rolling mill housing until the side of the rolling mill housing is aligned with the side position reference line of the rolling mill housing, and then stopping the adjustment; a re-measurement sub-step of re-measuring whether the center line of the rolling mill housing coincides with the unloading center line according to the auxiliary center line; if they coincide, it is determined that the positioning of the rolling mill housing is completed.

[0011] Further, in the above positioning method for unloading the rolling mill housing, in the position reference line determination sub-step, according to the auxiliary center line and the design distance between the side machining surface of the rolling mill housing and the auxiliary center line, the side position reference line of the rolling mill housing is determined and marked on the ground; wherein, the side position reference line of the rolling mill housing is parallel to the auxiliary center line.

[0012] Further, in the above positioning method for unloading the rolling mill housing, in the adjusting vehicle sub-step, two positioning brackets are installed on the side machining surface of the rolling mill housing, and the position of the transport vehicle is adjusted according to the side position reference line of the rolling mill housing and the positions of the two positioning brackets until the two positioning brackets are directly above the side position reference line of the rolling mill housing, and then stop the adjustment.

[0013] Further, in the above positioning method for unloading the rolling mill housing, in the remeasurement sub-step, measure the actual distances between the two reference points and the auxiliary center line, compare the actual distance between each measured reference point and the auxiliary center line with the theoretical distance. If they are equal, it is determined that the center line of the rolling mill housing coincides with the unloading center line.

[0014] In the present invention, an auxiliary center line is set according to the unloading center line, and the housing stop line is determined. The transport vehicle is reversed to the preset unloading position according to the housing stop line and the auxiliary center line, and then it is detected whether the center line of the rolling mill housing coincides with the unloading center line. If they do not coincide, the position of the transport vehicle is adjusted until the center line of the rolling mill housing coincides with the unloading center line, achieving precise positioning of the center line of the rolling mill housing, providing a guiding basis for the adjustment of the unloading position of the rolling mill housing, effectively ensuring that the unloading center line coincides with the center line of the rolling mill housing, and solving the problem in the prior art that precise positioning of the center line of the rolling mill housing during unloading cannot be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0016] Figure 1 is a flowchart of the positioning method for unloading the rolling mill housing provided by an embodiment of the present invention;

[0017] Figure 2 is a schematic diagram of the auxiliary center line identification in the positioning method for unloading the rolling mill housing provided by an embodiment of the present invention;

[0018] Figure 3 is a schematic diagram of the transport vehicle reversing in the positioning method for unloading the rolling mill housing provided by an embodiment of the present invention;

[0019] Figure 4 is a schematic diagram of measuring the distance between the reference point and the auxiliary center line in the positioning method for unloading the rolling mill housing provided by an embodiment of the present invention;

[0020] Figure 5 is a schematic diagram of the theoretical distance in the positioning method for unloading the rolling mill housing provided by an embodiment of the present invention;

[0021] Figure 6 is a schematic diagram of the side position reference line of the rolling mill housing in the positioning method for unloading the rolling mill housing provided by an embodiment of the present invention;

[0022] Figure 7Schematic diagram of the positioning frame provided in the embodiment of the present invention for the positioning method of unloading the rolling mill housing

[0023] Figure 8 Schematic diagram of the coincidence of the center line of the rolling mill housing and the center line of unloading the vehicle provided in the embodiment of the present invention for the positioning method of unloading the rolling mill housing Detailed implementation manners

[0024] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. Hereinafter, the present invention will be described in detail with reference to the drawings and in combination with the embodiments.

[0025] Refer to Figure 1 , Figure 1 Flowchart of the positioning method for unloading the rolling mill housing provided in the embodiment of the present invention. As shown in the figure, the positioning method for unloading the rolling mill housing includes the following steps:

[0026] Auxiliary center line setting step S1: Set an auxiliary center line at a first preset distance from the preset center line of unloading the vehicle, and the auxiliary center line is parallel to the center line of unloading the vehicle.

[0027] Specifically, the center line of unloading the vehicle is preset and can be marked on the ground.

[0028] The first preset distance can be determined according to the actual situation, and the present embodiment does not make any limitation on this. Refer to Figure 2 , taking the center line 1 of unloading the vehicle as a reference, set an auxiliary center line 2 at the first preset distance, and the auxiliary center line 2 is parallel to the center line 1 of unloading the vehicle. The first preset distance should ensure unobstructed visibility during measurement at the auxiliary center line to avoid line of sight obstruction.

[0029] Refer to Figure 2 , the housing 7 is placed on the transport vehicle 6.

[0030] Housing stop line determination step S2: Determine the housing stop line according to the preset unloading position of the rolling mill housing.

[0031] Specifically, refer to Figure 2 , according to the unloading position of the rolling mill housing, set a housing stop line 4 with the bottom of the rolling mill housing as a reference and make a mark on the ground. Among them, the housing stop line 4 is perpendicular to the center line 1 of unloading the vehicle.

[0032] In the reversing step S3, the transport vehicle is reversed to a preset unloading position according to the rack stop line and the auxiliary center line.

[0033] Specifically, see Figure 3 , when the tail of the transport vehicle 6 is aligned with the frame stop line 4, the reverse is stopped. In other words, when the reverse is put into place, the reverse can be stopped after the tail of the rolling mill frame reaches the frame stop line 4.

[0034] In the detection step S4, based on the auxiliary center line, it is detected whether the center line of the rolling mill frame coincides with the center line of the unloading vehicle.

[0035] Specifically, the detection step S4 further includes:

[0036] In sub-step S41, two reference points are selected on the top surface of the frame, and the two reference points are on the same straight line.

[0037] Specifically, see Figure 4 Two reference points are set on the top surface of the frame and at a second preset distance from the side machining surface of the rolling mill frame. The two reference points are on the same straight line, and one of the reference points corresponds to the position of the rolling mill frame lifting fixture.

[0038] More specifically, the two reference points are both set on the top surface of the frame, and each reference point has a second preset distance from the side machined surface of the rolling mill frame, so that the two reference points are on the same straight line, and the straight line is parallel to the side machined surface of the rolling mill frame. The side machined surface of the rolling mill frame is determined by the frame itself.

[0039] In specific implementation, the second preset distance can be determined according to actual conditions, and this embodiment does not impose any restrictions on this. In this embodiment, the second preset distance is 50 mm.

[0040] In this embodiment, the future hoisting fixture of the rolling mill frame is used as the reference point C1. Since it is not easy to set up a prism on the side of the rolling mill frame, the side machined surface of the rolling mill frame is used as the reference, and the reference points C8 and D9 are marked on the upper surface of the frame at a distance of 50 mm from the side machined surface of the rolling mill frame. The reference points C8 and D9 are on the same straight line.

[0041] The measurement sub-step S42 measures the actual distance between each reference point and the auxiliary center line.

[0042] Specifically, first, re-measure whether the auxiliary center line 2 is parallel to the unloading center line 1 , and then measure the actual distance between each reference point and the auxiliary center line 2 .

[0043] See also Figure 4, select two points (point A and point B) on the auxiliary center line 2, set up the total station at point A of the auxiliary center line, calibrate point B, and re-measure whether the auxiliary center line is parallel to the unloading center line. If they are parallel, the auxiliary center line is determined to be qualified. If they are not parallel, move the position of point B or point A to make the auxiliary center line parallel to the unloading center line.

[0044] Set up the total station at point A of the auxiliary center line, set up prisms at reference points C and D, and use the total station to calculate the distance Z1 from reference point C to the auxiliary center line and the distance Z2 from reference point D to the auxiliary center line.

[0045] In the comparison sub-step S43, the actual distance between each reference point and the auxiliary center line is measured and compared with the theoretical distance to detect whether the center line of the rolling mill frame coincides with the unloading center line.

[0046] Specifically, see Figure 4 and Figure 5 , the measured distances Z1 and Z2 are compared with the theoretical distance Z0 respectively to detect whether the center line of the rolling mill frame coincides with the unloading center line 1.

[0047] The theoretical distance Z0 is the sum of the designed distance between the side machined surface of the rolling mill stand and the auxiliary center line 2 and the second preset distance.

[0048] If the actual distance between each reference point and the auxiliary center line is equal to the theoretical distance, it is determined that the center line of the rolling mill frame coincides with the unloading center line. Specifically, Z1 = Z2 = Z0, then the center line of the rolling mill frame coincides with the unloading center line.

[0049] If the actual distance between at least one of the measured reference points and the auxiliary center line is not equal to the theoretical distance, it is determined that the center line of the rolling mill frame does not coincide with the center line of the unloading car. Specifically, as long as one of Z1 and Z2 is not equal to Z0, it is determined that the center line of the rolling mill frame does not coincide with the center line of the unloading car, and the adjustment direction of the rolling mill frame is determined.

[0050] Adjustment step S5: If they do not coincide, adjust the position of the transport vehicle until the center line of the rolling mill frame coincides with the center line of the unloading vehicle, and then stop adjusting.

[0051] Specifically, the adjustment step S5 further includes:

[0052] In step S51, the transport vehicle is driven away from the preset unloading position. Figure 6 .

[0053] The position reference line determination sub-step S52 is to determine the side position reference line of the rolling mill frame according to the auxiliary center line.

[0054] Specifically, according to the auxiliary center line and the designed distance between the side machining surface of the rolling mill stand and the auxiliary center line, determine the reference line 5 for the side position of the rolling mill stand, and mark the reference line 5 for the side position of the rolling mill stand on the ground; wherein, the reference line 5 for the side position of the rolling mill stand is parallel to the auxiliary center line 2. That is to say, referring to Figure 6 , according to the designed distance between the side machining surface of the rolling mill stand and the auxiliary center line, lay the reference line 5 for the side position of the rolling mill stand between the auxiliary center line 2 and the truck unloading center line 1, and mark the reference line 5 for the side position of the rolling mill stand on the ground with cotton thread.

[0055] Adjustment vehicle sub-step S53, reverse the transport vehicle to the preset unloading position, and adjust the position of the transport vehicle according to the reference line 5 for the side position of the rolling mill stand until the side of the rolling mill stand is aligned with the reference line 5 for the side position of the rolling mill stand, and then stop the adjustment.

[0056] Specifically, referring to Figure 7 , install two positioning brackets 10 on the side machining surface of the rolling mill stand, and adjust the position of the transport vehicle according to the reference line 5 for the side position of the rolling mill stand and the positions of the two positioning brackets 10 until the two positioning brackets 10 are directly above the reference line 5 for the side position of the rolling mill stand, and then stop the adjustment.

[0057] More specifically, referring to Figure 7 , each positioning bracket 10 has a tip extending towards the ground. After installing the positioning brackets 10, the transport vehicle 6 reverses to its position again. When reversing, adjust the position of the rolling mill stand according to the direction of the tip of the positioning bracket 10 and the reference line 5 for the side position of the rolling mill stand marked on the ground, and guide the driver to adjust the attitude of the transport vehicle 6 through a walkie-talkie. When the tip of the positioning bracket 10 points to the reference line 5 for the side position of the rolling mill stand, at this time, the two positioning brackets 10 are directly above the reference line 5 for the side position of the rolling mill stand, stop the adjustment. At this time, the center line 3 of the rolling mill stand meets the unloading requirements. When the tail of the rolling mill stand reaches the stand stop line 4, stop reversing.

[0058] Re-measurement sub-step S54, re-measure according to the auxiliary center line whether the center line of the rolling mill stand coincides with the truck unloading center line; if they coincide, it is determined that the positioning of the rolling mill stand is completed.

[0059] Specifically, referring to Figure 8 , measure the actual distances between two reference points and the auxiliary center line, compare the measured actual distances between each reference point and the auxiliary center line with the theoretical distances. If they are equal, it is determined that the center line of the rolling mill stand coincides with the truck unloading center line.

[0060] Set up the total station at point A of the auxiliary center line, set up prisms at reference points C and D, and use the total station to remeasure the distance Z1 from reference point C to the auxiliary center line and the distance Z2 from reference point D to the auxiliary center line. Then compare the measured distances Z1 and Z2 with the theoretical example Z0 respectively. If Z1 and Z2 are equal to Z0, it is determined that the center line of the rolling mill frame coincides with the unloading center line, the rolling mill frame positioning is completed, and unloading begins.

[0061] During the specific implementation, a total station is used to monitor the entire process of the transport vehicle from the adjustment of the vehicle into position to the completion of unloading, and the position status of the rolling mill is monitored in real time to ensure that the center line of the rolling mill meets the requirements after unloading.

[0062] It can be seen that in this embodiment, an auxiliary center line is set according to the unloading center line, and the frame stop line is determined. The transport vehicle is reversed to the preset unloading position according to the frame stop line and the auxiliary center line, and then it is detected whether the center line of the rolling mill frame coincides with the unloading center line. If not, the position of the transport vehicle is adjusted until the center line of the rolling mill frame coincides with the unloading center line, thereby achieving precise positioning of the center line of the rolling mill frame, providing a guiding basis for adjusting the unloading position of the rolling mill frame, and effectively ensuring that the unloading center line coincides with the center line of the rolling mill frame, thus solving the problem that the prior art cannot achieve precise positioning of the center line of the frame when the rolling mill frame is unloading.

[0063] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0064] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A positioning method for unloading a rolling mill housing, characterized in that It includes the following steps: Auxiliary center line setting step: Set an auxiliary center line at a first preset distance from a preset truck unloading center line, and the auxiliary center line is parallel to the truck unloading center line; Mill stand stop line determination step: Determine the mill stand stop line according to the preset truck unloading position of the mill stand; Reverse driving step: Reverse the transport vehicle to the preset truck unloading position according to the mill stand stop line and the auxiliary center line; Detection step: Detect whether the center line of the mill stand coincides with the truck unloading center line according to the auxiliary center line; Adjustment step: If they do not coincide, adjust the position of the transport vehicle until the center line of the mill stand coincides with the truck unloading center line, and then stop the adjustment; The detection step further includes: Selection sub-step: Select two reference points on the top surface of the mill stand, and the two reference points are on the same straight line; Measurement sub-step: Measure the actual distance between each reference point and the auxiliary center line; Comparison sub-step: Compare the actual distance between each measured reference point and the auxiliary center line with the theoretical distance respectively to detect whether the center line of the mill stand coincides with the truck unloading center line; In the selection sub-step, Intermittently set two reference points on the top surface of the mill stand and at a second preset distance from the side machining surface of the mill stand, and the two reference points are on the same straight line, and one of the reference points corresponds to the position of the lifting fixture of the mill stand; The adjustment step further includes: Driving away sub-step: Drive the transport vehicle away from the preset truck unloading position; Position reference line determination sub-step: Determine the position reference line on the side of the mill stand according to the auxiliary center line; Vehicle adjustment sub-step: Reverse the transport vehicle to the preset truck unloading position, and adjust the position of the transport vehicle according to the position reference line on the side of the mill stand until the side of the mill stand is aligned with the position reference line on the side of the mill stand, and then stop the adjustment; Re-measurement sub-step: Re-measure whether the center line of the mill stand coincides with the truck unloading center line according to the auxiliary center line; if they coincide, determine that the positioning of the mill stand is completed; In the position reference line determination sub-step, Determine the position reference line on the side of the mill stand according to the auxiliary center line and the designed distance between the side machining surface of the mill stand and the auxiliary center line, and mark the position reference line on the side of the mill stand on the ground; wherein, the position reference line on the side of the mill stand is parallel to the auxiliary center line.

2. The positioning method for unloading a rolling mill housing according to claim 1, characterized in that, In the reverse driving step, When the tail of the transport vehicle is aligned with the mill stand stop line, stop reversing.

3. The positioning method for unloading a rolling mill housing according to claim 1, characterized in that, In the comparison sub-step, The theoretical distance is the sum of the designed distance between the side machining surface of the mill stand and the auxiliary center line and the second preset distance.

4. The positioning method for unloading a rolling mill housing according to claim 3, characterized in that In the comparison sub-step, If the actual distance between each measured reference point and the auxiliary center line is equal to the theoretical distance, determine that the center line of the mill stand coincides with the truck unloading center line; If the actual distance between at least one of the measured reference points and the auxiliary center line is not equal to the theoretical distance, it is determined that the center line of the rolling mill stand does not coincide with the unloader center line.

5. The positioning method for unloading a rolling mill housing according to claim 1, characterized in that In the sub-step of adjusting the vehicle, Install two positioning frames on the side machining surface of the rolling mill stand, and adjust the position of the transport vehicle according to the side position reference line of the rolling mill stand and the positions of the two positioning frames until the two positioning frames are directly above the side position reference line of the rolling mill stand, and then stop the adjustment.

6. The positioning method for unloading a rolling mill housing according to claim 1, characterized in that In the sub-step of re-measuring, Measure the actual distances between the two reference points and the auxiliary center line, compare the actual distance between each measured reference point and the auxiliary center line with the theoretical distance. If they are equal, it is determined that the center line of the rolling mill stand coincides with the unloader center line.

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