A method for calibrating a shear blade of a western states mach shearing machine

Abstract

The present application relates to the technical field of westmac disc shears, and particularly relates to a kind of westmac disc shear blade calibration method.The present application first finds calibration reference point, and after multiple tracking data acquisition, it is found that when eccentric shaft adjusts the clearance between shear blades, the overlapping clearance changes with the side clearance, but when the side clearance is 0.4mm, the change of the overlapping clearance has no superposition value.The side clearance of 0.4mm is the calibration reference point of the overlapping clearance.Then the side clearance is calibrated first, and then the overlapping clearance is calibrated, and the actual trimming quality is combined to optimize the westmac trimming clearance parameter table, so that the trimming quality of soft material of DC03-DC06 level meets the quality requirements.

Description

Technical Field

[0001] This invention relates to the field of SMS disc shear technology, and more particularly to a method for calibrating the cutting blades of SMS disc shears. Background Technology

[0002] The SMS rotary shear is a turret type, equipped with four rotary shears and four edge trimmers, mounted on a rotating frame that can rotate 180°. It features ASC-type automatic blade gap setting control. The rotary shears and edge trimmers are integrated into a single unit, with a rotating platform on both the operating and drive sides. Each platform houses two sets of rotary shears and two complete edge trimmers (one as a spare). If waste accumulates in the chute between the rotary and edge trimmers, the other rotary and edge trimmers can simultaneously rotate to the working position. The spare unit can be immediately put into use, ensuring continuous production line operation, and can clear waste from the chute. Because the rotary and edge trimmers are on the same rotating platform, the chute between the rotary and edge trimmer blades is integrated, reducing the possibility of waste blockage. The rotation of the turntable is driven by a geared motor. After rotation, the platform is electromechanically clamped in the working position.

[0003] Based on the preset tables in the computer's Level 2 standard, the disc shear blade gap / overlap and the edge trimming gap can be automatically adjusted to any working position. The disc shear is a non-drive type. The blade gap and overlap are adjusted via a dedicated electric eccentric shaft. For different specifications of strip steel, a separate eccentric shaft is used to further refine the gap, achieving rapid opening.

[0004] The following shortcomings exist: Because the shear blade clearance is adjusted by an eccentric shaft, the overlap clearance changes with the side clearance, resulting in an additive value. The overlap clearance cannot be accurately calibrated using the normal zeroing procedure, affecting the cutting edge quality; moreover, using the existing cutting edge clearance parameter table, the cutting edge quality cannot meet the on-site requirements. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, a method for calibrating the blades of a SMS disc shear is provided. This method optimizes the SMS cutting gap parameter table based on actual cutting quality, so that the cutting quality of soft materials of grades DC03 to DC06 meets the requirements.

[0006] To achieve the above objectives, the present invention employs the following technical solution:

[0007] A method for calibrating the cutting edge of a SMS disc shear includes the following steps:

[0008] 1) Set the side clearance of 0.4mm as the benchmark point for overlapping clearance calibration;

[0009] 2) First, calibrate the side clearance:

[0010] First, adjust the side clearance to 0.2mm, then measure with a feeler gauge. After the feeler gauge can be inserted and removed without obstruction, proceed with calibration.

[0011] After readjusting the side clearance to 0.1mm, measure with a feeler gauge. Once the feeler gauge can be inserted and removed without obstruction, perform calibration.

[0012] Once the clearance is accurate, the side clearance calibration is complete.

[0013] 3) Recalibrate the overlap gap:

[0014] Adjust the side clearance to 0.4mm and the overlap clearance to -0.2mm to begin measurement. Use feeler gauges of different thicknesses to measure the overlap. Once the feeler gauge can be inserted and removed without obstruction, use the thickness of this feeler gauge for calibration.

[0015] After the overlap gap is automatically adjusted to 0mm and the gap measurement is accurate, the overlap gap calibration is complete.

[0016] 4) Optimize the SMS edge clearance parameter table:

[0017] A. Increase the ratio of the shearing zone to the fracture zone of the disc shear. The ratio of the shearing zone to the fracture zone of DC03 and DC04 is adjusted from 1:2 to 1:1; the ratio of the shearing zone to the fracture zone of DC05 and DC06 is adjusted from 1:2 to 2:1.

[0018] B. Reduce the shear clearance value of the disc to 0.1-0.2 mm.

[0019] As a further improvement of the present invention, step 1) involves measuring the side clearance at four points to ensure that the four-point measurement values ​​of the manual disc shear blade are the same.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] This invention first identifies a calibration reference point. Through repeated data collection, it was discovered that when adjusting the shear blade gap using the eccentric shaft, the overlap gap changes with the side gap. However, when the side gap is 0.4mm, the overlap gap shows no cumulative value. The side gap of 0.4mm is thus the calibration reference point for the overlap gap. The side gap is then calibrated first, followed by the overlap gap. Finally, the SMS edge-cutting gap parameter table is optimized based on actual edge-cutting quality to ensure that the edge-cutting quality of soft materials in grades DC03–DC06 meets the required standards. Attached Figure Description

[0022] Figure 1 This is a diagram showing the quality of the strip edge before optimization;

[0023] Figure 2 This is a diagram showing the quality of the strip cutting edge after optimization according to the present invention. Detailed Implementation

[0024] This invention discloses a method for calibrating the cutting edge of a SMS disc shear. Those skilled in the art can refer to this document and appropriately modify the process parameters to achieve the desired result. It should be particularly noted that all similar substitutions and modifications are obvious to those skilled in the art and are considered to be included in this invention. The method and application of this invention have been described through preferred embodiments. Those skilled in the art can clearly modify or appropriately change and combine the methods and applications described herein without departing from the content, spirit, and scope of this invention to realize and apply the technology of this invention.

[0025]

Example

[0026] A method for calibrating the blades of a Semikron disc shear, specifically including:

[0027] 1. Locate the calibration reference point

[0028] After multiple data collections, it was found that when adjusting the shear blade clearance with the eccentric shaft, the overlap clearance changes with the side clearance. However, when the side clearance is 0.4mm, the overlap clearance changes have no cumulative value. A side clearance of 0.4mm is the benchmark point for overlap clearance calibration.

[0029] 2. First, calibrate the side clearance.

[0030] First, adjust the side clearance to 0.2mm, then measure with a feeler gauge. Once the feeler gauge can be inserted and removed without obstruction, proceed with calibration. Next, adjust the side clearance to 0.1mm, and measure again with a feeler gauge. Once the feeler gauge can be inserted and removed without obstruction, proceed with calibration. Once the clearance is accurate, the side clearance calibration is complete. The side clearance should be measured at four points, and the shear blade should be manually rotated to ensure that the values ​​at all four points are identical.

[0031] 3. Calibrate the overlap gap

[0032] Adjust the side clearance to 0.4mm and the overlap clearance to -0.2mm, then begin measurement. Do not manually adjust the clearance. Use feeler gauges of different thicknesses to measure the overlap. Once the feeler gauges can be inserted and removed without obstruction, calibrate the measurement using the thickness of that feeler gauge. After the overlap clearance automatically adjusts to 0mm, and the measured clearance is accurate, the overlap clearance calibration is complete.

[0033] 4. Based on this method, the SMS edge cutting gap parameter table is optimized in combination with the actual edge cutting quality, so that the edge cutting quality of soft materials of DC03 to DC06 levels meets the quality requirements.

[0034] (1) The overlap gap value of the disc shear has been increased, that is, the ratio of the disc shear zone to the fracture zone has been increased. The ratio of the shear zone to the fracture zone of DC03 and DC04 has been adjusted from 1:2 to 1:1; the ratio of the shear zone to the fracture zone of DC05 and DC06 has been adjusted from 1:2 to 2:1.

[0035] (2) Reduce the shear gap value of the disc to 0.1-0.2 mm to ensure the quality of the strip cutting edge.

[0036] Before optimization, the quality of the strip cutting edge was as follows: Figure 1 As shown, the optimized strip edge cutting quality is as follows: Figure 2 As shown.

[0037] Table 1 shows the overlap gaps.

[0038] Table 1 Overlap Gap

[0039]

[0040]

[0041] Table 2 shows the side clearances.

[0042] Table 2 Side clearance

[0043]

[0044] This invention first identifies a calibration reference point. Through repeated data collection, it was discovered that when adjusting the shear blade gap using the eccentric shaft, the overlap gap changes with the side gap. However, when the side gap is 0.4mm, the overlap gap shows no cumulative value. The side gap of 0.4mm is thus the calibration reference point for the overlap gap. The side gap is then calibrated first, followed by the overlap gap. Finally, the SMS edge-cutting gap parameter table is optimized based on actual edge-cutting quality to ensure that the edge-cutting quality of soft materials in grades DC03–DC06 meets the required standards.

[0045] This invention has been applied to actual production. The amount of serrated edge defects caused by poor edge cutting quality in the pickling and rolling mill of Benxi Steel No. 3 Cold Rolling Plant was 145 tons / month. After using this invention, the amount of serrated edge defects was reduced to 19.6 tons / month.

[0046] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for calibrating the cutting blades of a Semikron disc shear, characterized in that, Specifically, the steps include the following: 1) Set the side clearance of 0.4mm as the benchmark point for overlapping clearance calibration; measure the side clearance at four points to ensure that the measured values ​​of the four points of the manual disc shear blade are the same; 2) First, calibrate the side clearance: First, adjust the side clearance to 0.2 mm, then measure it with a feeler gauge. After the feeler gauge can be inserted and removed without obstruction, proceed with the calibration. After readjusting the side clearance to 0.1mm, measure with a feeler gauge. Once the feeler gauge can be inserted and removed without obstruction, perform calibration. Once the clearance is accurate, the side clearance calibration is complete. 3) Recalibrate the overlap gap: Adjust the side clearance to 0.4mm and the overlap clearance to -0.2mm to begin measurement. Use feeler gauges of different thicknesses to measure the overlap. Once the feeler gauge can be inserted and removed without obstruction, use the thickness of this feeler gauge for calibration. After the overlap gap is automatically adjusted to 0mm and the gap measurement is accurate, the overlap gap calibration is complete. 4) Optimize the SMS edge clearance parameter table: A. Increase the ratio of the shearing zone to the fracture zone of the disc shear. The ratio of the shearing zone to the fracture zone of DC03 and DC04 is adjusted from 1:2 to 1:1; the ratio of the shearing zone to the fracture zone of DC05 and DC06 is adjusted from 1:2 to 2:

1. B. Reduce the shear clearance value of the disc to 0.1 ~ 0.2 mm.

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