阅读说明：本技术 一种碎边剪刀片重叠量的在线快速测量与调整方法 (On-line rapid measurement and adjustment method for overlap amount of rag shear blades ) 是由 耿延好 王金华 苗旺 周海军 于 2020-06-13 设计创作，主要内容包括：本发明涉及一种碎边剪刀片重叠量的在线快速测量与调整方法,所述方法包括以下步骤：步骤1：机组停机,使碎边剪停止运转；步骤2：将碎边剪的开口度打到最佳位置；步骤3：旋转刀头至某一对刀片在剪切位置,并用剪切面平行位置标定块定位；步骤4：测量此对刀片重叠区域内玄长；步骤5：根据重叠区域内玄长计算重叠量,并做超差部分调整；步骤6：标定完成,机组开机；主要解决现有技术现有技术测量重叠量过程繁琐,精度差,耗时长,在实际生产过程中难以操作等问题,实现高效精确测量,以此来提高生产效率。(The invention relates to an on-line rapid measurement and adjustment method for the overlapping amount of a scrap chopper blade, which comprises the following steps: step 1: the machine set is stopped, so that the scrap chopper stops running; step 2: the opening degree of the scrap chopper is beaten to the optimal position; and step 3: rotating the cutter head to a certain pair of blades at a shearing position, and positioning by using a calibration block at a position parallel to the shearing surface; and 4, step 4: measuring the length of the gap in the overlapping area of the pair of blades; and 5: calculating the overlapping amount according to the length of the dark place in the overlapping area, and adjusting the out-of-tolerance part; step 6: after calibration is completed, the unit is started; the method mainly solves the problems that the prior art is complex in overlapping quantity measuring process, poor in precision, long in time consumption, difficult to operate in the actual production process and the like, and realizes efficient and accurate measurement, so that the production efficiency is improved.)

1. A method for rapidly measuring and adjusting the overlapping amount of a scrap chopper blade on line is characterized by comprising the following steps:

step 1: the machine set is stopped, so that the scrap chopper stops running;

step 2: the opening degree of the scrap chopper is beaten to the optimal position;

and step 3: rotating the cutter head to a certain pair of blades at a shearing position, and positioning by using a calibration block at a position parallel to the shearing surface;

and 4, step 4: measuring the length of the gap in the overlapping area of the pair of blades;

and 5: calculating the overlapping amount according to the length of the dark place in the overlapping area, and adjusting the out-of-tolerance part;

step 6: and (5) completing calibration and starting the unit.

2. The method for on-line rapid measurement and adjustment of overlap of the blades of the scrap shears according to claim 1, wherein in the step 2, the opening degree is adjusted to the optimal position, which is divided into strip steel in the rolling process and strip-free steel in the maintenance and strip-drawing process, strip steel is provided, the opening degree is adjusted to the width of the current strip steel which is +500mm, strip steel is not provided, and the opening degree is adjusted to the distance from the center Min780 mm.

3. The method for rapidly measuring and adjusting the overlap of the rag shears blade according to claim 2, wherein in the step 3, the block for calibrating the parallel position of the shearing plane is divided into two blocks A (10) and B (11) for calibrating the parallel position of the upper and lower shearing blades (7) and (8); the calibration block A (10) is abutted against the end face of the lower shear blade (8), the calibration block B (11) is abutted against the calibration block A (10), and when the shearing surface of the upper shear blade (7) and the vertical surface of the calibration block B (11) have no intersection angle, the shearing surfaces of the upper shear blade (7) and the lower shear blade (8) are in parallel.

4. The method of claim 3, wherein in the step 4, the blade edge curves are symmetrical about the Y-axis, the edge curves of the upper and lower blades are symmetrical about the X-axis, the detecting of the overlap of the upper and lower blades can be converted into measuring the cross length of the overlap region curve, and the value of the overlap of the blades, i.e. the Y-value, is derived from the cross length, i.e. the X-value; the length of the knife blade in the overlapping area is detected through a special chord length detection device, the detection device is a chord length measuring scale, and the measuring range is (0 mm and 50 mm).

5. The method for on-line measuring and adjusting overlap of the blades of a pair of trimmers as claimed in claim 3 or 4, wherein in the step 5, four cutting edges of the pair of trimmers are used, the cutting edge curve is a portion of an ellipse, the curve is symmetrical about the Y-axis, the cutting edge curves of the upper and lower blades are symmetrical about the X-axis, the detection of the overlap of the upper and lower blades can be converted into the measurement of the length of the overlap region curve, and the value of the overlap of the blades, i.e. the Y-value, is derived from the length of the overlap, i.e. the X-value;

the equation of the cutting edge curve is as follows:

it can be deduced from equation (1):

Technical Field

The invention relates to a measuring and adjusting method, in particular to an online rapid measuring and adjusting method for the overlapping amount of a scrap shear blade, and belongs to the technical field of cold rolling machinery.

Background

The scrap cutter of the plum steel pickling unit is designed and manufactured by Mitsubishi Hitachi, Japan, because the thickness range of the produced materials of the unit is larger, the thinnest is 1.8mm, the thickest is 8.0mm, and part of thick high-strength steel is also provided, the strip steel pickling specification with the thickness of 10mm is developed in recent years, the shearing tonnage of the scrap cutter is lower, the overlapping amount of the scrap cutter needs to be adjusted frequently, the shearing tonnage of a blade is 5000-6000 tons, and the replacement is frequent. Due to the structural characteristics of the scrap chopper, the replacement mode is special, the side gap and the overlap amount of the blade are changed after the blade is replaced on site, the gap needs to be detected, adjusted and calibrated again after the blade is replaced, the scrap chopper replacement adopts a blade replacement mode, the machine base is not moved, the side gap and the overlap amount of the blade are adjusted by the tool during repair, the gap needs to be detected, adjusted and calibrated again after the blade is replaced on site, and 24 blades are arranged on the two pairs of blades, and the blade replacement and the side gap calibration and adjustment need to be carried out for 2 hours each time. Because the replacement time is long, the production operation rate of the unit is inevitably caused, and the unit yield is seriously influenced. Therefore, a method for rapidly measuring the overlap amount of the scrap cutters on line is necessary for optimizing and researching the operation mode of the scrap cutters.

Aiming at the current situation, technical personnel search related technologies at home and abroad, the conventional overlap measurement of the scrap cutters is detected by an inside micrometer, the upper and lower cutter head blades are required to be sequentially detached in the original overlap inspection procedure, and the method specifically comprises the following 8 steps:

1) removing the blades on a pair of blades whose overlap is to be detected;

2) rotating the pair of blades to a shearing position, measuring the distance from the lowest point of the arc of the upper blade base to the highest point of the arc of the lower blade by using an inside micrometer, and recording the measured value as A1;

3) the upper blade is reinstalled, and the lower blade is dismantled;

4) rotating the pair of blades to a shearing position, measuring the distance from the lowest point of the arc of the lower blade base to the highest point of the arc of the upper blade by using an inside micrometer, and recording the measured value as A2;

5) removing the upper blade;

6) rotating the pair of blades to a shearing position, measuring the distance between the lowest points of the arcs of the bases of the upper blade and the lower blade by using an inside micrometer, and marking the measured value as B;

7) the upper blade and the lower blade are installed back;

8) calculating the value of the overlap quantity: g is A1+ A2-B.

The whole measuring process is complicated and complicated, and the accuracy is not high. According to the original method, the blades need to be repeatedly disassembled and assembled, three data of the distance (A1) from the lowest point of the upper blade to the lowest point of the lower blade seat, the distance (A2) from the highest point of the lower blade to the highest point of the upper blade seat and the distance (B) from the highest point of the upper blade seat to the lowest point of the lower blade seat are respectively measured by an internal micrometer, when the blade is located at a shearing position, the measuring space is narrow, not only is the measuring time consumed, but also the measuring precision is difficult to guarantee, and about 60 minutes is needed for measuring the overlapping quantity value of a pair of blades. Due to the fact that time consumption is long, the production operation rate of the unit is seriously affected by the blade overlapping amount of online detection.

In order to eliminate series adverse effects brought by the original detection technology, technical personnel conduct further research, and the purpose is to achieve a simple, safe, reliable and efficient method so as to make up for the technical defects of the conventional detection method. The technical personnel firstly make the corresponding improvement of measuring tools in the mechanical aspect, so as to shorten the detection and adjustment time, and also correspondingly improve the material of the blade, further prolong the service life of the blade, and have obvious effect but large investment. The original existing problems that the space of the area where the equipment belongs is narrow and small, the construction difficulty is large, the first-aid repair is inconvenient and the like still exist and are obvious. Therefore, it is necessary to find a method for rapidly detecting the overlapping amount on site while ensuring the mounting dimension accuracy of the blade.

Through Chinese patent retrieval, Chinese patent 200520047084.0 'scrap cutter device capable of adjusting overlapping amount' is retrieved, and the scrap cutter device capable of adjusting the overlapping amount is provided, when scrap cutters are used for cutting strip steel with different specifications, the blade gap can be adjusted, and meanwhile, the overlapping amount of the linear regulator can be adjusted. Therefore, the aims of prolonging the service life of the blade, reducing the replacement times and reducing the production cost are fulfilled, but a detection and adjustment method is not involved.

In addition, chinese patent 201710392833.0 "a method for calibrating the gap between the cutting edges of scrap shears" firstly stops the scrap shears on both sides of the strip steel to ensure the safety of the calibration process; the two scrap cutters are separated to the maximum position, and the side gap of each pair of cutter blades is adjusted, so that the measurement accuracy is ensured; measuring the side clearance value of each pair of cutting edges, taking the cutting edge with the minimum side clearance value as a reference, and representing the side clearance value by a; adding a gasket under the rest shear blades and enabling the side clearance value to be equal to a; and b, calibrating a on the system. Compared with the traditional calibration method of taking an average value or a minimum value, the calibration method ensures that the side clearance of each pair of shear blades tends to the same value; and the phenomenon that the side clearance is smaller than the calibrated value, the edge is broken, and the phenomenon that the effective shearing capacity is lost when the side clearance is larger than the calibrated value are avoided. However, the solution involves the calibration and adjustment of the blade backlash, which is different from the present technology and the technical solution.

Disclosure of Invention

The invention provides an on-line rapid measuring and adjusting method of overlap of a scrap shear blade aiming at the problems in the prior art, mainly solves the problems that the process of measuring the overlap is complicated, the precision is poor, the time consumption is long, the operation is difficult in the actual production process and the like in the prior art, realizes efficient and accurate measurement, and improves the production efficiency. The time for detecting the overlapping amount of the pair of blades is shortened from the original 60 minutes to 1 minute, and the labor cost is saved.

In order to achieve the purpose, the technical scheme of the invention is that the method for rapidly measuring and adjusting the overlap amount of the scrap chopper blade on line is characterized by comprising the following steps:

step 1: the machine set is stopped, so that the scrap chopper stops running;

step 2: the opening degree of the scrap chopper is beaten to the optimal position;

and step 3: rotating the cutter head to a certain pair of blades at a shearing position, and positioning by using a calibration block at a position parallel to the shearing surface;

and 4, step 4: measuring the length of the gap in the overlapping area of the pair of blades;

and 5: calculating the overlapping amount according to the length of the dark place in the overlapping area, and adjusting the out-of-tolerance part;

step 6: and (5) completing calibration and starting the unit. Through optimizing each link of overlap amount detection of the scrap cutters, the purposes of quickly detecting and judging whether the overlap amount meets the design requirements or not in time, quickly calculating the offset value of the overlap amount, providing a basis for adjusting the overlap amount of the blades and providing necessary precondition for online blade replacement are achieved.

As an improvement of the invention, in the step 2, the opening degree is set to the optimal position and divided into strip steel in the rolling process and strip-free steel in the overhauling and strip-drawing process, wherein the strip steel is provided, the opening degree is set to the width of the current strip steel plus 500mm, the strip steel is not provided, and the opening degree is set to the distance Min780mm from the center.

As an improvement of the invention, in the step 3, the shear plane parallel position calibration block is divided into two blocks, namely a block A (10) and a block B (11), and is used for calibrating the parallel positions of the upper and lower shear blades (7) and (8); the calibration block A (10) is abutted against the end face of the lower shear blade (8), the calibration block B (11) is abutted against the calibration block A (10), and when the shearing surface of the upper shear blade (7) and the vertical surface of the calibration block B (11) have no intersection angle, the shearing surfaces of the upper shear blade (7) and the lower shear blade (8) are in parallel.

As a modification of the present invention, in step 4, the curve is symmetrical about the Y axis, the edge curves of the upper and lower blades are symmetrical about the X axis, the detection of the overlap amount of the upper and lower blades can be converted into the measurement of the length of the curve of the overlap area, and the value of the overlap amount of the blades, i.e. the Y value, is derived from the length of the X value;

furthermore, the length of the dark place in the blade overlapping region is detected by a special chord length detection device, wherein the detection device is a chord length measuring scale with the measuring range of 0mm and 50 mm.

As an improvement of the present invention, in step 5, four cutting edges of the ragger blade can be used, the cutting edge curve is a part of an ellipse, the curve is symmetrical about the Y axis, the cutting edge curves of the upper and lower blades are symmetrical about the X axis, detecting the overlap amount of the upper and lower blades can be converted into measuring the length of the overlap area curve, and the overlap amount of the blades, i.e. the Y value, is derived from the length of the length, i.e. the X value.

The equation of the cutting edge curve is as follows:

it can be deduced from equation (1):

further, the overlap amount G of the blade can be obtained as G being 2Y according to the blade edge curve overlap diagram, the overlap amount G of the blade is required to be within a range of [ 0.2mm, 0.25mm ], that is, 2Y is numerical value of [ 0.2mm, 0.25mm ], and Y is numerical value²The value is [ 0.01mm, 0.016mm ], in the formulaIn due to Y²Much less than 360Y, so Y²The signals are ignored out of the list,equation (2) can be simplified as:

in summary, according to equation (3), we can obtain:

when the overlap is 0.2, that is, Y1 is 0.1, X1 is 17.543, and the length L1 is 2X1 is 30.86 in the corresponding overlap region;

when the overlap is 0.25, that is, Y2 is 0.125, X2 is 19.613, and the length L2 is 2X2 is 39.23 in the corresponding overlap region;

according to the calculation, when the length L of the ridge in the overlapping area is within the range of 30.86-39.23, the blade overlapping amount is between 0.2-0.25, and the overlapping amount meets the requirement. Whether the overlapping quantity meets the requirement can be quickly judged by measuring the length of the blade in the overlapping area on site, and otherwise, when the measured value is smaller than 30.86mm or larger than 39.23mm, the overlapping quantity can be judged to be not met and needs to be adjusted.

According to the formula (3)Pushing out:

if the length L of the ridge in the overlapping area exceeds the range of 30.86-39.23 in field measurement, according to the formula (4), the value X (X is L/2) is substituted into the formula to quickly calculate the actual overlapping value of the blade, and the overlapping amount is adjusted by correspondingly adding and subtracting shims according to the calculation result.

According to the calculation, when the length L of the ridge in the overlapping area is within the range of 30.86-39.23, the blade overlapping amount is between 0.2-0.25, and the overlapping amount meets the requirement. Whether the overlapping quantity meets the requirement can be quickly judged by measuring the length of the blade in the overlapping area on site, and otherwise, when the measured value is smaller than 30.86mm or larger than 39.23mm, the overlapping quantity can be judged to be not met and needs to be adjusted.

If the length L of the ridge in the overlapping area exceeds the range of 30.86-39.23 in field measurement, according to the formula (4), the value X (X is L/2) is substituted into the formula to quickly calculate the actual overlapping value of the blade, and the overlapping amount is adjusted by correspondingly adding and subtracting shims according to the calculation result.

Compared with the prior art, the method has the advantages that after the method for detecting the overlap amount of the scrap shears is adjusted, the method has simple, practical and accurate functions, can be debugged in place at one time, improves the detection accuracy and success rate, avoids the phenomenon that the service life of the blade is sharply reduced due to detection errors, reduces fault handling time and reduces the safety risk of operating personnel, and compared with the method that the number of the shearing tonnage of the scrap shears in 2019 is 9965 tons per month, the maximum number of the shearing tonnage in the highest month reaches 12284 tons, and the blades are changed for 4-5 times per month, the number of the shearing tonnage in the month is 6000 tons per 2018, the blades are changed for 8-9 times per month, and the shearing tonnage and the stability of the scrap shears are greatly improved. Compared with the prior art, the technology of the invention has the obvious advantages that: 1) the time difference caused by repeatedly disassembling and assembling the blade in the prior art is avoided; 2) the accuracy of measuring three data by using an inside micrometer due to narrow measuring space is avoided; 3) the time for measuring the overlapping quantity value of a pair of blades is shortened to 1 minute from 60 minutes; 4) the existing method is improved by optimally utilizing the existing equipment, the method is successfully implemented at one time in a production field, and after a plurality of months of tests, the use effect is good, the method can be completely or mostly used on systems of the same type, similar equipment of a unit of the same type can completely use the method to measure the blade overlapping amount, and the blade replacing operation on line is realized.

Drawings

FIG. 1, a flow chart of the present invention

FIG. 2 is a schematic view of a scrap cutter;

FIG. 3, a schematic view of chord length measurement;

FIG. 4 is a schematic view showing the blade edge curves superimposed;

FIG. 5 is a schematic diagram of a position calibration block structure;

FIG. 6 is a schematic diagram of the position calibration block;

in the figure: 1-blade and blade head; 2-gear distribution box; 3-backlash adjustment means; 4-a reduction gearbox; 5, a motor; 6-port opening degree adjusting device; 7-upper blade; 8-lower blade; 9-a length of the brown ruler; 10-calibration Block A; 11-calibration block B;

the specific implementation mode is as follows:

for the purpose of enhancing an understanding of the present invention, the present embodiment will be described in detail below with reference to the accompanying drawings.

Example 1: referring to fig. 1, a method for rapidly measuring and adjusting an overlap amount of a rag shear blade on line, the method comprising the steps of:

step 1: the machine set is stopped, so that the scrap chopper stops running;

step 2: the opening degree of the scrap chopper is beaten to the optimal position;

and step 3: rotating the cutter head to a certain pair of blades at a shearing position, and positioning by using a calibration block at a position parallel to the shearing surface;

and 4, step 4: measuring the length of the gap in the overlapping area of the pair of blades;

and 5: calculating the overlapping amount according to the length of the dark place in the overlapping area, and adjusting the out-of-tolerance part;

step 6: and (5) completing calibration and starting the unit.

And 2, opening degree is set to the optimal position and divided into strip steel in the rolling process, non-strip steel in the overhauling and strip drawing process and strip steel, the opening degree is set to +500mm of the width of the current strip steel without the strip steel, and the opening degree is set to a position away from the center Min780 mm.

Step 3, dividing the shear plane parallel position calibration block into two blocks A (10) and B (11) for calibrating the parallel positions of the upper and lower shear blades (7) and (8); the calibration block A (10) is abutted against the end face of the lower shear blade (8), the calibration block B (11) is abutted against the calibration block A (10), and when the shearing surface of the upper shear blade (7) and the vertical surface of the calibration block B (11) have no intersection angle, the shearing surfaces of the upper shear blade (7) and the lower shear blade (8) are in parallel.

Step 4, the curve is symmetrical about the Y axis, the cutting edge curves of the upper and lower blades are symmetrical about the X axis, the detection of the overlapping amount of the upper and lower blades can be converted into the measurement of the length of the line of the overlapping area, and the value of the overlapping amount of the blades, namely the Y value, is deduced through the length of the line, namely the X value;

furthermore, the length of the dark place in the blade overlapping region is detected by a special chord length detection device, wherein the detection device is a chord length measuring scale with the measuring range of 0mm and 50 mm.

In the step 5, four cutting edges of the scrap chopper blade can be used, the cutting edge curve is a part of an ellipse, the curve is symmetrical about a Y axis, the cutting edge curves of the upper blade and the lower blade are symmetrical about an X axis, the detection of the overlapping amount of the upper blade and the lower blade can be converted into the measurement of the length of the curve of the overlapping area, and the value of the overlapping amount of the blades, namely the Y value, is deduced through the length of the length, namely the X value.

The equation of the cutting edge curve is as follows:

it can be deduced from equation (1):

further, the overlap amount G of the blade can be obtained as G being 2Y according to the blade edge curve overlap diagram, the overlap amount G of the blade is required to be within a range of [ 0.2mm, 0.25mm ], that is, 2Y is numerical value of [ 0.2mm, 0.25mm ], and Y is numerical value²The value is [ 0.01mm, 0.016mm ], in the formulaIn due to Y²Much less than 360Y, so Y²The signals are ignored out of the list,equation (2) can be simplified as:

in summary, according to equation (3), we can obtain:

when the overlap is 0.2, that is, Y1 is 0.1, X1 is 17.543, and the length L1 is 2X1 is 30.86 in the corresponding overlap region;

when the overlap is 0.25, that is, Y2 is 0.125, X2 is 19.613, and the length L2 is 2X2 is 39.23 in the corresponding overlap region;

according to the calculation, when the length L of the ridge in the overlapping area is within the range of 30.86-39.23, the blade overlapping amount is between 0.2-0.25, and the overlapping amount meets the requirement. Whether the overlapping quantity meets the requirement can be quickly judged by measuring the length of the blade in the overlapping area on site, and otherwise, when the measured value is smaller than 30.86mm or larger than 39.23mm, the overlapping quantity can be judged to be not met and needs to be adjusted.

It can be deduced from equation (3):

if the length L of the ridge in the overlapping area exceeds the range of 30.86-39.23 in field measurement, according to the formula (4), the value X (X is L/2) is substituted into the formula to quickly calculate the actual overlapping value of the blade, and the overlapping amount is adjusted by correspondingly adding and subtracting shims according to the calculation result.

According to the calculation, when the length L of the ridge in the overlapping area is within the range of 30.86-39.23, the blade overlapping amount is between 0.2-0.25, and the overlapping amount meets the requirement. Whether the overlapping quantity meets the requirement can be quickly judged by measuring the length of the blade in the overlapping area on site, and otherwise, when the measured value is smaller than 30.86mm or larger than 39.23mm, the overlapping quantity can be judged to be not met and needs to be adjusted.

Through optimizing each link of overlap amount detection of the scrap cutters, the purposes of quickly detecting and judging whether the overlap amount meets the design requirements or not in time, quickly calculating the offset value of the overlap amount, providing a basis for adjusting the overlap amount of the blades and providing necessary precondition for online blade replacement are achieved.

The working process is as follows: referring to fig. 1-6, and fig. 5 and 6, the shear plane parallel position calibration block is divided into two blocks a (10) and B (11) for calibration of the upper and lower cutting edges (7), (8) in parallel position. The calibration block A (10) is abutted against the end face of the lower shear blade (8), the calibration block B (11) is abutted against the calibration block A (10), and when the shearing surface of the upper shear blade (7) and the vertical surface of the calibration block B (11) have no intersection angle, the shearing surfaces of the upper shear blade (7) and the lower shear blade (8) are in parallel.

The chord length in the blade overlapping region is detected by a special chord length detection device, and the overlapping magnitude of the blades is deduced. The method is simple, and the value of the overlap amount of the pair of blades only needs about 1 minute.

If the length L of the ridge in the overlapping area exceeds the range of 30.86-39.23 in field measurement, according to the formula (4), the value X (X is L/2) is substituted into the formula to quickly calculate the actual overlapping value of the blade, and the overlapping amount is adjusted by correspondingly adding and subtracting shims according to the calculation result.

For example, the length L of the ridge in the overlapping area of a pair of blades is measured in the field to be 50mm, and based on the above, it can be determined that the overlapping amount of the pair of blades is too large, and it is necessary to reduce the number of shims, and according to the formula (4), X is substituted by L/2, and Y is calculated to be 0.203, and G is substituted by 2Y to be 0.41 mm. It is desirable to reduce the thickness of the shim by at least 0.16mm and by at most 0.21 mm.

The length L of the gap in the overlapping area of a certain pair of blades is measured to be 35mm on site, and according to the content, the overlapping amount of the pair of blades is inferred to be between 0.2 and 0.25mm, and the gap between the blades meets the requirement.

The length L of the ridge in the overlapping area of a certain pair of blades is measured in situ to be 25mm, according to the above contents, the overlapping amount of the pair of blades is estimated to be small, a gasket needs to be added, according to the formula (4), X is L/2, Y is 0.051, and the overlapping amount G is 2Y is 0.1 mm. At least 0.1mm thick shims are required, and at most 0.15mm shims are required.

It should be noted that the above-mentioned embodiments are not intended to limit the scope of the present invention, and all equivalent modifications and substitutions based on the above-mentioned technical solutions are within the scope of the present invention as defined in the claims.