A method for detecting and adjusting a main drive connecting shaft of a continuous rolling mill

Abstract

The application belongs to the technical field of rolling mill and discloses a detection and adjustment method for a connecting shaft of a main transmission of a continuous rolling mill, which comprises the following steps: detecting the horizontal position of the connecting shaft of the main transmission shaft of the continuous rolling mill, detecting the vertical height of the connecting shaft of the main transmission shaft of the continuous rolling mill, and adjusting the upper connecting shaft and the lower connecting shaft according to the detection results. The application basically guarantees the position precision of the connecting shaft of the rack of the continuous rolling mill, avoids the shutdown and work loss caused by the position deviation of the connecting shaft, reduces the production capacity loss caused by the shutdown and work loss, improves the equipment guarantee capacity, and guarantees the production efficiency of the continuous rolling mill.

Description

Technical Field

[0001] This invention belongs to the field of steel rolling machinery technology, and relates to the detection and adjustment of the main drive shaft of a continuous rolling mill, specifically a method for detecting and adjusting the main drive connecting shaft of a continuous rolling mill. Background Technology

[0002] Currently, the installation of the main connecting shaft of continuous rolling mills in China mainly uses two methods: bracket support and suspension. The suspension method primarily uses hydraulic cylinder suspension, with the connecting shaft end in a petal-shaped configuration; this type of structure generally requires no adjustment. The other method uses bracket wheels to support the main drive connecting shaft. In this type, one end of the main drive connecting shaft is connected to the main reducer, and the other end is supported by bracket wheels. The position and height of the connecting shaft are adjusted by the bracket to ensure proper roll loading. The installation position of the connecting shaft in a continuous rolling mill is adjusted during initial equipment installation by measuring with a string line to ensure the measured value matches the standard value. This measurement method is suitable for initial equipment installation, with the advantages of accuracy and simplicity. The disadvantage is that it requires little or no equipment within the mill stand, and the preparation work for measurement and adjustment is cumbersome and time-consuming. Typically, domestic continuous rolling mills of this type do not spend much effort on checking and adjusting the connecting shaft during use or replacement. Only when the connecting shaft position deviates and cannot be properly loaded with rolls is the machine forced to stop for adjustment. To quickly resume production, the entire adjustment process is coarse, only requiring adjustment to achieve the goal of loading rolls. This method cannot guarantee positional accuracy. The connecting shaft may still be subject to resistance during the roller loading process. Long-term use will cause the bracket wheel device to deform under stress, and the abnormal roller loading due to the positional deviation of the connecting shaft will reappear, resulting in a vicious cycle. Summary of the Invention

[0003] The purpose of this invention is to provide a method for detecting and adjusting the main drive connecting shaft of a continuous rolling mill. By utilizing the structural characteristics of the continuous rolling mill and with the help of auxiliary measuring tools, the position of the main drive connecting shaft of the continuous rolling mill can be accurately detected.

[0004] The technical solution adopted by the present invention to achieve the above objectives is as follows:

[0005] A method for detecting the main drive connecting shaft of a continuous rolling mill includes the following steps:

[0006] S1. Detection of horizontal position of connecting shaft;

[0007] S11. Using the inner side of the rolling mill archway as a reference, attach the level to the inside of the archway.

[0008] S12. Measure the horizontal distance between the connecting shaft and the level ruler. Take two points on the inlet side and the outlet side respectively for measurement.

[0009] S13, compare the numerical value, detect whether the adjusting connecting shaft is parallel to the inside of the rolling mill housing, and detect whether the adjusting connecting shaft is in the center position of the housing;

[0010] S2, connecting shaft vertical direction height detection;

[0011] S21, measure the levelness of the connecting shaft with a level gauge, and ensure that the levelness of the upper and lower connecting shafts is within a reasonable precision range;

[0012] S22, take the track plane of the work roll as a measurement reference, and adsorb the level gauge on the track on both sides of the work roll,

[0013] S23, measure the position of the level gauge to the lower connecting shaft, and then measure the position between the upper and lower shafts;

[0014] S24, calculate the relative position between the upper and lower connecting shafts again, compare the detection value deviation with the standard, and if the standard is not met, adjust the next step;

[0015] A method for adjusting the main transmission connecting shaft of a continuous rolling mill, comprising the following steps:

[0016] S31, adjust the position of the upper connecting shaft, install the upper work roll into the upper connecting shaft, and measure the gap between the bracket wheel and the upper connecting shaft with a feeler gauge, and according to the measured value, add or reduce the gasket at the position to be adjusted, so that the tolerance is less than or equal to the standard range;

[0017] S32, adjust the position of the lower connecting shaft, install the lower work roll into the lower connecting shaft, and measure the gap between the bracket wheel and the upper connecting shaft with a feeler gauge, and according to the measured value, add or reduce the gasket at the position to be adjusted, so that the tolerance is less than or equal to the standard range;

[0018] The beneficial effects of the present application are: through the detection and adjustment of the main transmission connecting shaft of the continuous rolling mill, the position precision of the connecting shaft of the continuous rolling mill frame is basically guaranteed, the shutdown and work loss caused by the position deviation of the connecting shaft are avoided, the production capacity loss caused by the shutdown and work loss is reduced, the equipment support capability is improved, and the production efficiency of the continuous rolling mill is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a continuous rolling mill level detection schematic diagram in the present application;

[0020] Figure 2 is a continuous rolling mill connecting shaft numerical height detection schematic diagram in the present application;

[0021] Figure 3 is a continuous rolling mill connecting shaft adjustment schematic diagram in the present application;

[0022] In the diagram: 1. Rolling mill stand; 2. Upper connecting shaft; 3. Level ruler; 4. Work roll track; 5. Lower connecting shaft; 6-1. Upper support roller one; 6-2. Upper support roller two; 7-1. Lower support roller one; 7-2. Lower support roller two; 8. Gap one; 9. Gap two; 10. Gap three; 11. Gap four; 12-1. Upper support roller frame base plate one; 12-2. Upper support roller frame base plate two; 13-1. Shim one; 13-2. Shim two; 14-1. Lower support roller frame base plate one; 14-2. Lower support roller frame base plate two; 15-1. Shim three; 15-2. Shim four. Detailed Implementation

[0023] The present invention will be further described below with reference to embodiments and accompanying drawings: Example

[0024] The method for inspecting and adjusting the connecting shaft of the 1450 silicon steel continuous rolling mill includes the following steps:

[0025] S1. Detect the horizontal position of the connecting shaft, such as... Figure 1 As shown;

[0026] S11. First, inspect the upper connecting shaft 2 and attach the level ruler 3 to the inside of the rolling mill stand 1.

[0027] S12. Measure the distance between the level ruler 3 and the upper connecting shaft 2. Take two points on the inlet side and the outlet side respectively to measure and obtain D1, D2, D3, and D4.

[0028] S13. Compare the values ​​of D1, D2, D3, and D4 to ensure that D1-D4≤±0.1mm and D2-D3≤±0.10mm. At the same time, D1-D2≤±0.1mm and D3-D4≤±0.1mm must also be satisfied. This not only checks whether the upper connecting shaft is parallel to the inside of the rolling mill stand, but also checks whether the upper connecting shaft is in the center position of the stand; ensuring that the upper connecting shaft is parallel and aligned.

[0029] S14. Repeat S11-S13 to check the lower connecting shaft.

[0030] S2. Detect the vertical height of the connecting shaft, such as... Figure 2 As shown;

[0031] S21. Use a level to check the level of the upper connecting shaft 2 and the lower connecting shaft 5 respectively to ensure the levelness of the connecting shafts;

[0032] S22. Attach the horizontal ruler 3 above the work roller track 4 and measure the distance H1 between the horizontal ruler 3 and the lower connecting shaft 5, and the distance H2 between the lower connecting shaft 5 and the upper connecting shaft 2.

[0033] S23. Calculate the relative position ΔH1-H2 between the upper connecting shaft 2 and the lower connecting shaft 5;

[0034] S24, compare H1-H1'≤±0.8mm, H2-H2'≤±0.8mm, ΔH-ΔH'≤±1mm, wherein H1', H2', ΔH' are standard values. Wherein ΔH-ΔH' is also very critical, the upper connecting shaft 2 and the lower connecting shaft 5 affect each other when the work roll is normally mounted, ΔH-ΔH' is too large or too small, which will increase the resistance during the mounting process, causing mounting difficulty; if the detection value deviation meets the standard, no adjustment is needed, if it does not meet the standard, the next step adjustment is needed.

[0035] S3, adjust the connecting shaft; as shown in Figure 3

[0036] S31, adjust the position of the upper connecting shaft 2, mount the upper work roll into the upper connecting shaft 2, measure the gap 8 and the gap 9 between the upper bracket wheel 1 6-1, the upper bracket wheel 2 6-2 and the upper connecting shaft 2 respectively with a feeler gauge, according to the measured value, increase or reduce the gasket 1 3-1 and the gasket 2 13-2 between the upper bracket bottom plate 1 2-1, the upper bracket bottom plate 2 12-2 and the rolling mill housing 1 respectively, so that the tolerance is less than or equal to the standard range;

[0037] S32, adjust the position of the lower connecting shaft 5, mount the lower work roll into the lower connecting shaft 5, measure the gap 10 and the gap 11 between the lower bracket wheel 1 7-1, the lower bracket wheel 2 7-2 and the lower connecting shaft 5 respectively with a feeler gauge, according to the measured value, increase or reduce the gasket 3 15-1, the gasket 4 15-2 between the lower bracket bottom plate 1 14-1, the lower bracket bottom plate 2 14-2 and the rolling mill housing 1 respectively, so that the tolerance is less than or equal to the standard range.​

Claims

1. A method for detecting and adjusting the main drive connecting shaft of a continuous rolling mill, characterized in that: It comprises the following steps: S1, detecting the horizontal position of the connecting shaft; S11, taking the inside measurement of the rolling mill housing as the reference, and adsorbing the level gauge on the inside of the housing; S12, measuring the horizontal distance between the connecting shaft and the level gauge, and taking two points on the inlet side and the outlet side for measurement; S13, comparing the measurement values of the two points to detect whether the connecting shaft is parallel to the inside of the rolling mill housing and whether the connecting shaft is in the center position of the housing; S2, detecting the vertical height of the connecting shaft; S21, measuring the level of the connecting shaft with the level gauge to ensure that the horizontal degree of the upper connecting shaft and the lower connecting shaft is within the reasonable precision range; S22, taking the track plane of the work roll as the measurement reference, and adsorbing the level gauge on the track on both sides of the work roll, S23, measuring the distance from the level gauge to the lower connecting shaft, and then measuring the distance between the upper connecting shaft and the lower connecting shaft; S24, calculating the relative position between the upper connecting shaft and the lower connecting shaft, comparing the deviation of the detection values with the standard, and adjusting if the deviation does not meet the standard; S3, adjusting the upper connecting shaft and the lower connecting shaft; S31, adjusting the position of the upper connecting shaft, loading the upper work roll into the upper connecting shaft, and measuring the gap between the upper bracket wheel and the upper connecting shaft with the feeler gauge, and adding or reducing the shims between the bottom plate of the upper bracket wheel and the rolling mill housing according to the measurement value so that the tolerance is less than or equal to the standard range; S32, adjusting the position of the lower connecting shaft, loading the lower work roll into the lower connecting shaft, and measuring the gap between the lower bracket wheel and the lower connecting shaft with the feeler gauge, and adding or reducing the shims between the bottom plate of the lower bracket wheel and the rolling mill housing according to the measurement value so that the tolerance is less than or equal to the standard range.

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