A quality control parameter detection table and adjusting method for improving the assembly quality of a screed

Abstract

The application discloses a quality control parameter detection table for improving the assembly quality of a smoothing plate and a regulating method, which comprises a platform base, a cast iron platform installed on the platform base, a plurality of laser ranging sensors installed on the cast iron platform, and a calibration ruler movably installed on the cast iron platform and used for zeroing the detection distance of the laser ranging sensors; a motor support installed on one side of the platform base, a speed regulating motor and a telescopic transmission shaft installed on the motor support, the telescopic transmission shaft being connected with the speed regulating motor and driven to rotate by the speed regulating motor; and the laser ranging sensors and the speed regulating motor being connected with a display respectively. The application is based on the rapidness and high accuracy of the laser ranging sensors, and the smoothing plate assembly quality control parameter detection table is used in cooperation, so that a detection means of key assembly parameters of the smoothing plate is provided for a smoothing plate assembly line, and the labor cost and the time cost are saved.

Description

Technical Field

[0001] This invention relates to a quality control parameter testing platform and adjustment method for improving the assembly quality of screeds, belonging to the technical field of screed testing for pavers. Background Technology

[0002] Whether the paver's pavement construction results meet the construction requirements is a crucial indicator for evaluating the quality of the paved pavement. Currently, laser trackers are used on screed assembly lines to inspect the flatness of the screed surface. However, using laser trackers to inspect the flatness of the screed's bottom surface is time-consuming and only suitable for random sampling. Using feeler gauges or visual inspection suffers from inconsistencies, incomplete data, and low accuracy. The flatness of the screed bottom plate, the position of the vibration stop point, the vibration stroke, and the vibration phase difference are key parameters affecting the smoothness of pavement paving. The lack of suitable and rapid testing methods during screed assembly has been a significant factor hindering the improvement of screed assembly quality. Summary of the Invention

[0003] To address the problems existing in the prior art, this invention provides a quality control parameter testing platform and adjustment method for improving the assembly quality of ironing sheets. The platform has high testing accuracy, strong repeatability and operability, and is easy to use.

[0004] To achieve the above objectives, the present invention employs a quality control parameter detection station for improving the assembly quality of ironing sheets, comprising:

[0005] The platform base has a cast iron platform mounted on it, and multiple laser rangefinders are mounted on the cast iron platform. A calibration ruler for zeroing the detection distance of the laser rangefinders is also movably mounted on the cast iron platform.

[0006] A motor bracket is installed on one side of the platform base. A speed-regulating motor and a telescopic drive shaft are mounted on the motor bracket. The telescopic drive shaft is connected to the speed-regulating motor and is driven to rotate by the speed-regulating motor.

[0007] The laser rangefinder and the speed-regulating motor are respectively connected to the display.

[0008] As an improvement, the cast iron platform has a hardness greater than HB 200 and a flatness of no more than 0.1 mm.

[0009] As an improvement, the laser rangefinder is a non-contact displacement sensor.

[0010] As an improvement, the calibration ruler is made of copper and has a flatness of no more than 0.05 mm.

[0011] As an improvement, the telescopic drive shaft is connected to the vibrating shaft, and a speed-regulating motor is used as the power input for the vibrating shaft, with the speed of the speed-regulating motor ranging from 10 to 20 rpm.

[0012] In addition, the present invention also provides a method for improving the assembly quality of ironing sheets, which uses the aforementioned quality control parameter detection station for improving the assembly quality of ironing sheets, and includes the following steps:

[0013] S1. Start the testing platform, place the calibration ruler on the upper surface of the cast iron platform, and zero the detection distance of each laser rangefinder in turn using the calibration ruler.

[0014] S2. Adjust the camber of the ironing plate to zero, hoist the ironing plate to the top of the testing platform, and slowly lower it onto the cast iron platform to avoid bumping the platform and reducing the test accuracy. Also, ensure that the inner side of the vibrating beam is parallel to the upper edge of the cast iron platform and deviates outward by 1-2 mm.

[0015] S3. Connect the telescopic drive shaft to the vibrating shaft on the side of the ironing board;

[0016] S4. Start the flatness test program for the base plate. The laser rangefinder on the cast iron platform detects the distance between the upper surface of the cast iron platform and the base plate of the screed. The flatness of the base plate of the screed is calculated and displayed on the monitor in real time. Observe the flatness of the base plate of the screed. If the flatness data is greater than the limit, judge and manually adjust the tightening torque of the mounting bolts of the base plate of the screed according to the test data of each measuring point. At the same time, observe the change of the flatness value of the base plate in real time until the flatness of the base plate is lower than the limit. The adjustment is completed.

[0017] S5. Start the speed-regulating motor and adjust the speed to the range of 10-20 rpm. The speed-regulating motor drives the telescopic transmission shaft and the vibrating shaft to rotate synchronously.

[0018] S6. Start the vibration test program. Set the sampling frequency according to the speed of the speed-regulating motor. The sampling frequency is 5 to 10 times the speed of the speed-regulating motor. The laser distance sensor under the vibration beam detects the distance between the upper surface of the cast iron platform and the lower surface of the vibration beam. The distance data of each detection point changes in real time as the vibration beam moves up and down.

[0019] The lower stop position, vibration stroke, and vibration phase difference of the vibrating beam are calculated according to relevant formulas and displayed on the monitor in real time.

[0020] S7. Observe the data of the lower stop point position of the screed, the screed stroke, or the screed phase difference to determine whether the lower stop point, screed stroke, and screed phase difference meet the assembly requirements. If they do not meet the assembly requirements, turn off the power output of the telescopic drive shaft, manually adjust the relevant assembly dimensions, and then turn on the power output of the telescopic drive shaft again. Observe whether the data of the lower stop point position, screed stroke, and screed phase difference meet the standards. Repeat this process until the lower stop point position, screed stroke, and screed phase difference meet the assembly requirements. The adjustment is then complete.

[0021] Compared with existing technologies, this invention, based on the speed and high accuracy of laser rangefinders, and in conjunction with an ironing plate assembly quality control parameter detection station, provides a means for detecting key assembly parameters of ironing plates on the ironing plate assembly line, while saving labor and time costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the quality control parameter detection station of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the quality control parameter detection station of the present invention.

[0024] Figure 3 This is a schematic flowchart of the adjustment method of the present invention;

[0025] Figure 4 This is a comparison diagram of the displacement and time waveform curves collected from adjacent vibrating beams according to the present invention.

[0026] In the diagram: 1. Platform base, 2. Cast iron platform, 3. Laser rangefinder sensor, 4. Motor bracket, 5. Display, 6. Calibration ruler, 7. Speed-regulating motor, 8. Telescopic drive shaft, 9. Ironing plate, 10. Vibrating beam, 11. Vibrating shaft. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below. However, it should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of the invention.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0029] like Figure 1 , Figure 2 As shown, a quality control parameter testing station for improving the assembly quality of ironing boards includes:

[0030] Platform base 1, on which a cast iron platform 2 is installed, the cast iron platform 2 has multiple holes, and multiple laser rangefinders 3 are installed in the holes. A calibration ruler 6 for zeroing the detection distance of the laser rangefinders 3 is also movably installed on the cast iron platform 2.

[0031] Motor bracket 4 is installed on one side of platform base 1. Speed-regulating motor 7 and telescopic transmission shaft 8 are installed on motor bracket 4. The telescopic transmission shaft 8 is connected to speed-regulating motor 7 and is driven to rotate by speed-regulating motor 7.

[0032] The laser rangefinder 3 and the speed-regulating motor 7 are respectively connected to the display 5.

[0033] As an improvement to the embodiment, the cast iron platform 2 has a hardness greater than HB 200 and a flatness of no more than 0.1 mm; the calibration ruler 6 is made of copper and has a flatness of no more than 0.05 mm, thus ensuring measurement accuracy.

[0034] As an improvement to the embodiment, the laser rangefinder 3 is a non-contact displacement sensor. The laser rangefinder 3 is used to detect the distance between the upper surface of the cast iron platform 2 and the bottom plate of the screed (sensor range is 5mm) and the distance between the upper surface of the cast iron platform 2 and the lower surface of the vibrating beam 10 (sensor range is 12mm).

[0035] As an improvement to the embodiment, the telescopic drive shaft 8 is connected to the vibrating shaft 11, and a speed-regulating motor 7 is used as the power input for the vibrating shaft 11, with the speed of the speed-regulating motor 7 ranging from 10 to 20 rpm.

[0036] Finally, the present invention also provides a method for improving the assembly quality of ironing sheets, which uses the aforementioned quality control parameter detection station for improving the assembly quality of ironing sheets, and includes the following steps:

[0037] S1. Start the testing platform, place the calibration ruler 6 on the upper surface of the cast iron platform 2, and zero the detection distance of each laser rangefinder 3 in turn using the calibration ruler 6.

[0038] S2. Adjust the camber of the ironing plate 9 to zero, hoist the ironing plate 9 to the top of the testing table, and slowly lower it onto the cast iron platform 2 to avoid bumping the platform and causing a decrease in testing accuracy. Also, ensure that the inner side of the vibrating beam 10 is parallel to the upper edge of the cast iron platform 2 and deviates outward by 1-2 mm.

[0039] S3. Connect the telescopic drive shaft 8 to the vibrating shaft 11 on the side of the ironing plate 9;

[0040] S4. Start the flatness test program of the base plate. A portion of the laser rangefinder 3 on the cast iron platform 2 detects the distance between the upper surface of the cast iron platform 2 and the base plate of the ironing plate. The flatness of the base plate of the ironing plate is calculated according to the calculation formula (1) and displayed on the display 5 in real time. Observe the flatness of the base plate of the ironing plate. If the flatness data is greater than the limit, judge and manually adjust the tightening torque of the mounting bolts of the base plate of the ironing plate according to the test data of each measuring point. At the same time, observe the change of the flatness value of the base plate in real time until the flatness of the base plate is lower than the limit and the adjustment is completed.

[0041] Among them, the calculation formula (1) is used to calculate the flatness of the ironing plate bottom plate. After the test starts, the laser range sensor 3 measures the distance from the cast iron platform reference surface to the ironing plate bottom plate. The test data of the laser range sensor at each position are A, B, C... respectively. According to the formula MAX(A, B, C...)-MIN(A, B, C...), it is calculated in real time and displayed on the display.

[0042] S5. Start the speed-regulating motor 7 and adjust the speed to the range of 10-20 rpm. The speed-regulating motor 7 drives the telescopic transmission shaft 8 and the vibrating shaft to rotate synchronously.

[0043] S6. Start the vibration test program and set the sampling frequency according to the speed of the speed-regulating motor 7. In order to ensure test accuracy, the sampling frequency should not be less than 5 times the speed of the speed-regulating motor 7 (e.g., when the speed is 15 rpm, the sampling frequency should not be less than 1.25 Hz) to avoid incorrect calculation due to too little data collected per unit time. The laser distance sensor 3 under the vibration beam 10 detects the distance between the upper surface of the cast iron platform 2 and the lower surface of the vibration beam 10. The distance data of each detection point changes in real time as the vibration beam 10 moves up and down.

[0044] The lower stop position, vibration stroke, and vibration phase difference of the vibrating beam 10 are calculated according to the calculation formula (2) and displayed on the display 5 in real time.

[0045] Among them, the calculation formula (2) is used to calculate the lower stop position of the vibrating beam, the vibration stroke, and the vibration phase difference. After the test starts, the laser range sensor measures the distance from the reference surface of the cast iron platform to the lower surface of the vibrating beam. The test data of the laser range sensor at each position are A, B, C, etc. Since the vibrating beam moves up and down during the test, the test data of the laser range sensor at each position changes in real time during the test. MIN(A) represents the minimum value of the test data at point A, MAX(A) represents the maximum value of the test data at point A, and so on.

[0046] The lower stop position of the vibrating beam: Point A lower stop position = MIN(A) - height difference of cast iron platform - height of front slope angle of screed bottom plate, Point B lower stop position = MIN(B) - height difference of cast iron platform - height of front slope angle of screed bottom plate, Point C lower stop position = MIN(C) - height difference of cast iron platform - height of front slope angle of screed bottom plate...;

[0047] Vibration stroke: Vibration stroke at point A = MAX(A) - MIN(A), vibration stroke at point B = MAX(B) - MIN(B), vibration stroke at point C = MAX(C) - MIN(C) ...;

[0048] Vibration phase difference: The phase difference between adjacent vibrating beams is measured, and the displacement and time waveform curves collected from adjacent vibrating beams are compared, as follows: Figure 4 As shown, the formula for calculating the phase difference of the vibrating beam is as follows:

[0049] In the formula: φ is the phase difference of vibration between adjacent vibrating beams, in °; Δt is the time difference between the wave crests of adjacent vibrating beams, in s; T is the vibration period, in s; and θ is the angle of one rotation of the vibrating beam, in °.

[0050] S7. Observe the data of the lower stop point position of the ironing plate and determine whether the lower stop point meets the assembly requirements. If it does not meet the assembly requirements, turn off the power output of the telescopic drive shaft 8, manually adjust the relevant assembly dimensions, and then turn on the power output of the telescopic drive shaft 8 again. Observe whether the lower stop point position data meets the standard. Repeat this process until the lower stop point position of the ironing plate meets the assembly requirements and the adjustment is completed.

[0051] S8. Observe the vibration stroke data of the screed and determine whether the vibration stroke meets the assembly requirements. If it does not meet the assembly requirements, turn off the power output of the telescopic drive shaft 8, manually adjust the relevant assembly dimensions, and then turn on the power output of the telescopic drive shaft 8 again. Observe whether the vibration stroke data meets the standard. Repeat this process until the vibration stroke meets the assembly requirements and the adjustment is completed.

[0052] S9. Observe the vibration phase difference data of the screed and determine whether the vibration phase difference meets the assembly requirements. If it does not meet the assembly requirements, turn off the power output of the telescopic drive shaft 8, manually adjust the relevant assembly dimensions, and then turn on the power output of the telescopic drive shaft 8 again. Observe whether the vibration phase difference data meets the standard. Repeat this process until the vibration phase difference meets the assembly requirements and the adjustment is completed.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for improving the assembly quality of an ironing board, characterized in that, A quality control parameter testing station for improving the assembly quality of ironing boards is adopted, including: Platform base (1), on which a cast iron platform (2) is installed, on which multiple laser rangefinders (3) are installed, and on which a calibration ruler (6) for zeroing the detection distance of the laser rangefinders (3) is also movably installed; Motor bracket (4), the motor bracket (4) is installed on one side of the platform base (1), the motor bracket (4) is equipped with a speed regulating motor (7) and a telescopic transmission shaft (8), the telescopic transmission shaft (8) is connected to the speed regulating motor (7) and the speed regulating motor (7) drives the telescopic transmission shaft (8) to rotate. The laser rangefinder (3) and the speed-regulating motor (7) are respectively connected to the display (5); Includes the following steps: S1. Start the testing platform, place the calibration ruler (6) on the upper surface of the cast iron platform (2), and zero the detection distance of each laser rangefinder (3) in turn using the calibration ruler (6); S2. Adjust the camber of the ironing plate (9) to zero, hoist the ironing plate (9) to the top of the testing platform, and slowly lower it onto the cast iron platform (2), ensuring that the inner side of the vibrating beam (10) is parallel to the upper edge of the cast iron platform (2) and deviates outward by 1-2 mm. S3. Connect the telescopic drive shaft (8) to the vibrating shaft (11) on the side of the ironing board (9); S4. Start the flatness test program of the base plate. The laser distance sensor (3) on the cast iron platform (2) detects the distance between the upper surface of the cast iron platform (2) and the base plate of the ironing plate. The flatness of the base plate of the ironing plate is calculated and displayed on the display (5) in real time. Observe the flatness of the base plate of the ironing plate. If the flatness data is greater than the limit, judge and manually adjust the tightening torque of the mounting bolts of the base plate of the ironing plate according to the test data of each measuring point. At the same time, observe the change of the flatness value of the base plate in real time until the flatness of the base plate is lower than the limit. The adjustment is completed. S5. Start the speed regulating motor (7) and adjust the speed to within the range of 10 to 20 rpm. The speed regulating motor (7) drives the telescopic transmission shaft (8) and the vibrating shaft (11) to rotate synchronously. S6. Start the vibration test program. Set the sampling frequency according to the speed of the speed-regulating motor (7). The sampling frequency is 5 to 10 times the speed of the speed-regulating motor (7). The laser distance sensor (3) under the vibration beam (10) detects the distance between the upper surface of the cast iron platform (2) and the lower surface of the vibration beam (10). The distance data of each detection point changes in real time as the vibration beam (10) moves up and down. The lower stop position, vibration stroke, and vibration phase difference of the vibrating beam (10) are calculated according to the relevant formulas and displayed on the display (5) in real time. The calculation formula is used to calculate the lower stop position of the vibrating beam, the vibration stroke, and the vibration phase difference. After the test starts, the laser rangefinder measures the distance from the reference surface of the cast iron platform to the lower surface of the vibrating beam. The test data of the laser rangefinder at each position are A, B, C, etc. Since the vibrating beam moves up and down during the test, the test data of the laser rangefinder at each position changes in real time. MIN(A) represents the minimum value of the test data at point A, MAX(A) represents the maximum value of the test data at point A, and so on. The lower stop position of the vibrating beam: Point A lower stop position = MIN(A) - height difference of cast iron platform - height of front slope angle of screed bottom plate, Point B lower stop position = MIN(B) - height difference of cast iron platform - height of front slope angle of screed bottom plate, Point C lower stop position = MIN(C) - height difference of cast iron platform - height of front slope angle of screed bottom plate...; Vibration stroke: Vibration stroke at point A = MAX(A) - MIN(A), vibration stroke at point B = MAX(B) - MIN(B), vibration stroke at point C = MAX(C) - MIN(C)...; Vibration phase difference: The phase difference between adjacent vibrating beams is measured, and the displacement and time waveform curves collected from adjacent vibrating beams are compared. The formula for calculating the phase difference of the vibrating beam is as follows: φ= ×θ; where: φ is the phase difference of vibration between adjacent vibrating beams, in °; Δt is the time difference between the peaks of adjacent vibrating beams, in s; T is the vibration period, in s; and θ is the angle of one rotation of the vibrating beam, in °. S7. Observe the data of the lower stop point position of the screed plate, the data of the screed plate vibration stroke, or the data of the screed plate vibration phase difference. Determine whether the lower stop point, vibration stroke, and vibration phase difference meet the assembly requirements. If they do not meet the assembly requirements, turn off the power output of the telescopic drive shaft (8), manually adjust the relevant assembly dimensions, and then turn on the power output of the telescopic drive shaft (8). Observe whether the data of the lower stop point position, vibration stroke, and vibration phase difference meet the standards. Repeat this process until the lower stop point position, vibration stroke, and vibration phase difference meet the assembly requirements and the adjustment is completed.

2. The method for improving the assembly quality of an ironing board according to claim 1, characterized in that, The cast iron platform (2) has a hardness greater than HB 200 and a flatness of no more than 0.1mm.

3. The method for improving the assembly quality of an ironing board according to claim 1, characterized in that, The laser rangefinder (3) is a non-contact displacement sensor.

4. The method for improving the assembly quality of an ironing board according to claim 1, characterized in that, The calibration ruler (6) is made of copper and has a flatness of no more than 0.05 mm.

5. The method for improving the assembly quality of an ironing board according to claim 1, characterized in that, The telescopic drive shaft (8) is connected to the vibrating shaft (11), and a speed-regulating motor (7) is used as the power input for the vibrating shaft (11). The speed of the speed-regulating motor (7) is between 10 and 20 rpm.

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