Dynamic balance tester, testing equipment and method for saw blade component of electric saw

Abstract

The invention relates to the technical field of circular saw blade component testing, in particular to a dynamic balance tester, testing equipment and method for a saw blade component of an electric saw, and the tester comprises a clamping seat which is cooperatively arranged at the upper part of a circular saw blade, the clamping seat is kept fixed in a working state, the vertical parts at the two sides of the clamping seat are respectively arranged at the two sides of the circular saw blade, and the vertical parts at the two sides of the clamping seat are connected with the clamping seat. The middle part of each vertical part is respectively provided with a rotary test unit, the two rotary test units synchronously rotate in a working state, and the two rotary test units are used for simultaneously collecting the vibration amplitudes of a plurality of parts on the surfaces of the two sides of the circular saw blade and feeding back the vibration amplitudes to an external control host. According to the invention, the fixed clamping seat is matched with the rotary test unit which rotates synchronously, synchronous monitoring of vibration amplitude and acceleration is carried out on a plurality of parts at two sides of the circular saw blade, limitation of single-point test is avoided, the vibration condition of the circular saw blade can be reflected more comprehensively, and accuracy and comprehensiveness of a test result are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of circular saw blade component testing, and in particular to a dynamic balance tester, testing equipment and method for an electric saw blade component. Background Art

[0002] In many industries such as wood processing and metal cutting, electric saws are core cutting equipment, and the dynamic balance performance of their circular saw blades has a decisive impact on processing quality, equipment life, and operational safety. When the circular saw blade is running at high speed, even the slightest imbalance will cause violent vibration, which will not only reduce cutting accuracy and make the cut rough, but may also cause premature wear or even breakage of the circular saw blade, which in serious cases endangers the personal safety of the operator.

[0003] In the prior art, there are some products for circular saw blade related performance detection. For example, the patent document with patent publication number CN119737855A discloses a circular saw blade swing detection device and method. This patent monitors the swing amplitude of the circular saw blade in real time by online detection of the downstream cutting seam width of the circular saw blade.

[0004] Once the circular saw blade starts to swing or the swing amplitude reaches a certain value, the controller will promptly issue an alarm to remind the user to check the circular saw blade, thereby eliminating the problem of circular saw blade swinging and avoiding further damage to the circular saw blade, thereby extending the service life of the circular saw blade to a certain extent and improving the safety of the use of the circular saw blade.

[0005] However, this patented technology has obvious limitations, as follows: First, it only infers the swing of the circular saw blade through the indirect parameter of the cutting seam width, and cannot accurately obtain the actual balance data of multiple points of the circular saw blade in operation. The dynamic balance of the circular saw blade is affected by a variety of complex factors such as uneven mass distribution and installation deviation. It is difficult to fully and accurately reflect the balance state of the circular saw blade at each position by only detecting the cutting seam width.

[0006] Second: In actual production scenarios, circular saw blades of different materials and specifications have different balance requirements. As the saw is used for a longer time, the wear locations and degrees of the circular saw blades vary. A single cutting seam width detection method cannot perform detailed and accurate dynamic balance tests for these complex situations, and it is difficult to meet the current demand for high-precision detection of circular saw blades and diversified application scenarios.

[0007] Therefore, it is necessary to design a device and method that can test the multi-point balance of a circular saw blade in operation. Summary of the invention

[0008] The present invention is to solve one of the above-mentioned technical problems, and the technical solution adopted is: a dynamic balance tester for an electric saw blade component, wherein the electric saw blade component is a circular saw blade, and the dynamic balance tester includes a holder that is cooperatively arranged on the upper part of the circular saw blade, and the holder remains fixed in a working state, and the vertical parts on both sides of the holder are respectively placed on both sides of the circular saw blade, and a rotating test unit is respectively installed in the middle of each vertical part, and the two rotating test units rotate synchronously in a working state, and the two rotating test units are used to simultaneously collect the vibration amplitudes of multiple parts of the surface of both sides of the circular saw blade and feed back to an external control host.

[0009] Based on any of the above technical solutions, further optimization is that: the rotation test unit includes a horizontal motor, the casing of the horizontal motor is fixed relative to the clamping seat, the motor shaft of the horizontal motor is movably extended into the clamping space between the two vertical parts, a multi-vibration point acquisition component is arranged in the clamping space, the outer side of the multi-vibration point acquisition component is fixed to the end of the motor shaft of the horizontal motor, and the two multi-vibration point acquisition components are respectively placed on both sides of the circular saw blade inside the clamping space.

[0010] On the basis of any one of the above technical solutions, further optimization is that: the horizontal motor drives the multi-vibration point acquisition component to complete periodic swing or rotation.

[0011] Based on any of the above technical solutions, further optimization is that: a flange tube is fixedly connected to the outer wall in the middle of the vertical part, the horizontal motor can be fixed to the end of the flange tube, and the motor shaft of the horizontal motor passes through the inner cavity of the flange tube and movably extends into the positioning space and is fixedly connected to the center of the outer wall of the multi-vibration point acquisition component.

[0012] Based on any of the above technical solutions, further optimization is that: the multi-vibration point acquisition component includes a vertical turntable fixed to the end of the motor shaft of the horizontal motor, a vibration sensing group is installed in the middle of the inner wall of the vertical turntable facing the circular saw blade, and acceleration sensing groups are symmetrically installed on the inner walls on both sides of the vibration sensing group, the vibration sensing group is used to test the vibration displacement of multiple points on the surface of the circular saw blade in the radial direction when the circular saw blade is in operation, and the acceleration sensing group is used to test the vibration acceleration of multiple points on the surface of the circular saw blade when the circular saw blade is in operation.

[0013] Based on any of the above technical solutions, further optimization is that: the vibration sensing group includes a plurality of laser displacement sensors arranged along the radial direction of the vertical turntable, the laser displacement sensor located in the middle is installed at the center of the vertical turntable, and the acceleration sensing group includes a plurality of laser Doppler vibration sensors arranged at intervals, and each of the laser displacement sensors and each of the laser Doppler vibration sensors are perpendicular to the inner wall of the vertical turntable.

[0014] The present invention also provides a dynamic balance testing device for an electric saw blade component, comprising two dynamic balance testers symmetrically arranged at intervals, wherein the dynamic balance tester adopts the dynamic balance tester as described above, wherein the inner ends of the two dynamic balance testers are fixedly mounted on the ends of a first extension mechanism at their corresponding positions, the bottom of the first extension mechanism is fixed on a lifting platform, a first lifting mechanism is fixedly mounted on the bottom of the lifting platform, the bottom of the first lifting mechanism is fixed on the top of a test platform, and a control host with a built-in controller is mounted at the top center of the test platform.

[0015] On the basis of any of the above technical solutions, further optimization is that: the middle part and both ends of the lifting platform are folded vertically upward to form a gear part for fixing the first extending mechanism; the first extending mechanism includes two horizontal cylinders that are horizontally spaced and synchronously extended, and the telescopic ends of the two horizontal cylinders are movable to the outside of the lifting platform and fixedly connected to the side wall of the base; the first lifting mechanism includes a number of vertically arranged and synchronously lifted lifting cylinders, the top of each lifting cylinder is fixed to the bottom of the lifting platform, and the bottom of each lifting cylinder is fixed to the top of the test platform.

[0016] The present invention also provides a method for testing the dynamic balance of an electric saw blade component, comprising the following steps: calibrating the equipment in place: installing the dynamic balance tester in place, adjusting the position of its cassette so that the deviation between the center of the cassette and the center of the circular saw blade is ≤±1 mm, and ensuring that the horizontal error of the cassette is ≤±0.5°; calibrating the laser displacement sensor and the laser Doppler vibration sensor of the dynamic balance tester.

[0017] Start-up and collection settings: Start the circular saw blade of the electric saw to the preset speed, turn on the rotation test unit of the dynamic balance tester; set the multi-vibration point collection component to collect data in fixed, radial movement, and rotation modes.

[0018] Data acquisition and transmission: The vibration sensing group of the dynamic balance tester collects the circular saw blade vibration displacement data at 100Hz, and the acceleration sensing group collects the vibration acceleration data at 200Hz; the data is cached after preliminary filtering and transmitted to the control host when it reaches 500 groups.

[0019] Data analysis and judgment: The control host performs noise reduction processing on the received data, conducts time domain and frequency domain analysis, and compares it with the standard database to judge the dynamic balance of the circular saw blade.

[0020] Report generation: Based on the analysis and judgment results, the control host generates a test report, which includes circular saw blade information, collected data, balance conclusions and adjustment suggestions.

[0021] On the basis of any of the above technical solutions, further optimization is as follows: During the equipment calibration stage, the test environment needs to be strictly controlled; high-precision thermometer and hygrometer and noise tester are used to monitor environmental parameters in real time; when the temperature exceeds the range of 20-30℃, it is adjusted by air conditioning cooling or heating; when the humidity is not in the range of 40%-60%, a dehumidifier or humidifier is used to adjust it; when the noise is higher than 60dB, a soundproof cover and sound-absorbing materials are used to reduce the noise. Ensure the stability of the environment to avoid interference with the sensor accuracy of the dynamic balance tester and the accuracy of the circular saw blade data collection.

[0022] On the basis of any of the above technical solutions, further optimization is that each acquisition mode has precise requirements: In the fixed acquisition mode, the multi-vibration point acquisition component of the dynamic balance tester stays stably for 1-2 minutes to obtain the stable vibration characteristics of the specific position of the circular saw blade. During radial movement acquisition, the component moves from the inner edge to the outer edge of the circular saw blade at a uniform speed of 0.2-0.3 cm / s, and collects data every 0.3 cm, covering the radial area of ​​the circular saw blade. In the rotation acquisition mode, the component rotates clockwise and counterclockwise for more than 1 minute at a speed of 1 / 4-1 / 3 of the circular saw blade speed to obtain the vibration information of the circular saw blade in all directions.

[0023] On the basis of any of the above technical solutions, further optimization is that: data collection is equipped with a fault warning and processing mechanism. When the sensor of the dynamic balance tester fails or the collected circular saw blade data is abnormal, the system immediately issues an audible and visual alarm. At the same time, the time of the fault, the fault sensor number, and the abnormal data characteristics are accurately recorded. For a faulty sensor, it automatically switches to a backup sensor to continue collecting; for abnormal data, data fitting and interpolation methods are used to correct or mark and remove them to ensure the reliability of the data and the accuracy of subsequent circular saw blade analysis results.

[0024] On the basis of any of the above technical solutions, further optimization is that when the control host analyzes data, in addition to conventional time domain and frequency domain analysis, correlation analysis and trend analysis are also introduced. Correlation analysis calculates the correlation coefficient of vibration data at different points of the circular saw blade, determines the degree of correlation of vibration at each point, and finds out the potential vibration propagation path and influencing factors. Trend analysis models multiple circular saw blade test data, analyzes the trend of vibration parameters over time, predicts the performance degradation and failure probability of circular saw blades, and provides a scientific basis for preventive maintenance of circular saw blades.

[0025] Based on any of the above technical solutions, the following is further optimized: after the test report is generated, it is automatically sent to the mailbox of the relevant personnel through a secure and encrypted email system, and uploaded to the enterprise-level shared server at the same time, with different permissions set for personnel to access. The report backup adopts a multi-copy storage strategy in different locations to ensure data security. Relevant personnel can log in to the system remotely to view the report, maintain the circular saw blade according to the recommendations in the report, and use the dynamic balance tester to test again after the maintenance is completed. Compare the before and after reports to evaluate the maintenance effect and continuously optimize the operating status of the circular saw blade.

[0026] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the vibration amplitude and acceleration of multiple positions on both sides of the circular saw blade are synchronously monitored by using a fixed card holder and a synchronously rotating rotating test unit, thereby avoiding the limitation of single-point testing, reflecting the vibration of the circular saw blade more comprehensively, and ensuring the accuracy and comprehensiveness of the test results.

[0027] 2. The rotating test unit maintains a distance from the surface of the circular saw blade for non-destructive monitoring, which not only ensures the integrity and normal use of the circular saw blade during the test, but also can conduct random inspections and quality assessments on newly produced circular saw blades, and can also test used circular saw blades without contacting the polluted environment, thus ensuring the safety of the testers.

[0028] 3. The multi-vibration point acquisition component has three working states: fixed, radial movement, and rotation, which cooperate with each other to meet different test requirements. Fixed acquisition obtains stable data at specific points, radial movement achieves comprehensive coverage, and rotation acquisition adapts to high-speed circular saw blades, improving the versatility and test accuracy of the equipment, and providing data support for the research and development optimization of circular saw blades.

[0029] 4. Combined with monitoring the vibration amplitude and vibration acceleration of the circular saw blade, the working status of the circular saw blade can be fully understood and potential problems can be discovered in time. For example, when the vibration is abnormal, early warning and fault diagnosis can be given to avoid affecting the cutting quality and the life of the circular saw blade, thereby improving the overall safety of the equipment and reducing the risk of equipment downtime and maintenance costs.

[0030] 5. Analyze the vibration data of circular saw blades based on the test, and trace back the problems in the design or manufacturing process of the electric saw, providing clues for optimizing the overall performance of the electric saw, which is helpful to improve the design and manufacturing process and improve product quality and performance; at the same time, the standardized processing and use of the test report facilitates the maintenance and effect evaluation of the circular saw blade, and continuously optimizes the operating status of the circular saw blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, the elements or components are not necessarily drawn according to the actual scale.

[0032] Figure 1 It is a three-dimensional diagram of the dynamic balance tester of the present invention.

[0033] Figure 2 It is a front view of the dynamic balance tester of the present invention.

[0034] Figure 3 for Figure 2 AA section structure schematic diagram.

[0035] Figure 4 It is a schematic diagram of the structure of the dynamic balance tester of the present invention when it is in use.

[0036] Figure 5 It is a schematic diagram of the three-dimensional structure of the dynamic balance testing equipment of the present invention.

[0037] Figure 6 It is a schematic diagram of the main structure of the dynamic balance testing device of the present invention.

[0038] Figure 7 It is a schematic diagram of a local three-dimensional structure of the present invention.

[0039] In the figure: 1. circular saw blade; 2. holder; 3. horizontal motor; 4. flange pipe; 5. vertical turntable; 6. laser displacement sensor; 7. laser Doppler vibration sensor; 8. lifting platform; 9. test platform; 10. gear part; 11. horizontal cylinder; 12. lifting cylinder; 13. control host. DETAILED DESCRIPTION

[0040] The following is a detailed description of the embodiments of the technical solution of the present invention in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present invention. Figure 1-Figure 7 as shown in .

[0041] Embodiment 1: A dynamic balance tester for an electric saw blade component, wherein the electric saw blade component is a circular saw blade 1, and the dynamic balance tester comprises a holder 2 which is cooperatively arranged on the upper part of the circular saw blade 1, wherein the holder 2 remains fixed in a working state, and the vertical parts on both sides of the holder 2 are respectively arranged on both sides of the circular saw blade 1, and a rotating test unit is respectively installed in the middle of each vertical part, and the two rotating test units rotate synchronously in a working state, and the two rotating test units are used for simultaneously collecting the vibration amplitudes of multiple parts on the surface of both sides of the circular saw blade 1 and feeding back to an external control host 13.

[0042] When testing the dynamic balance vibration of the circular saw blade 1 in operation, first adjust the holder 2 to be directly above the circular saw blade 1, control the holder 2 to slowly move down to a suitable position and enable the rotating test units on both sides to complete the test and monitoring of both sides of the circular saw blade 1. When performing the test, the two rotating test units maintain a distance from the corresponding surfaces of the circular saw blade 1 to achieve a state of non-destructive monitoring. The two rotating test units respectively monitor the horizontal swing amplitude displacement caused by the dynamic vibration generated on the corresponding surfaces of the circular saw blade 1 and feed back to the control host 13. In addition, during the monitoring process, the rotating test unit simultaneously tests the vibration acceleration of the vibration point.

[0043] The fixed holder 2 and the synchronously rotating rotating test unit ensure stable and synchronous monitoring of both sides of the circular saw blade 1, improving the accuracy and comprehensiveness of the test. At the same time, multi-position acquisition can more comprehensively reflect the vibration of the circular saw blade 1, avoiding the limitations of single-point testing.

[0044] On the basis of any of the above technical solutions, further optimization is that: the rotation test unit includes a horizontal motor 3, the casing of the horizontal motor 3 is fixed relative to the clamping base 2, the motor shaft of the horizontal motor 3 is movably extended into the clamping space between the two vertical parts, a multi-vibration point acquisition component is arranged in the clamping space, the outer side of the multi-vibration point acquisition component is fixed to the end of the motor shaft of the horizontal motor 3, and the two multi-vibration point acquisition components are respectively placed on both sides of the circular saw blade 1 inside the clamping space.

[0045] The non-destructive monitoring avoids damage to the circular saw blade 1, ensuring the integrity and normal use of the circular saw blade 1 during the test. The vibration displacement and acceleration are monitored at the same time, providing more abundant vibration information, making the assessment of the vibration state of the circular saw blade 1 more accurate.

[0046] In addition, since it is non-destructive monitoring, newly produced circular saw blades 1 can be sampled and the quality of circular saw blades 1 can be quickly evaluated without affecting the sales and use of circular saw blades 1. Circular saw blades 1 that have been used in harsh environments can also be tested without contacting the polluted environment, ensuring the safety of the testers.

[0047] On the basis of any of the above technical solutions, further optimization is that: the horizontal motor 3 drives the multi-vibration point acquisition component to complete periodic swing or rotation.

[0048] There are three working states of the multi-vibration point acquisition component: the first is that it remains stationary after being adjusted into place, so that test data can be periodically acquired from multiple points of the circular saw blade 1, and the corresponding vibration parameter information can be acquired in real time in conjunction with the rotation speed of the circular saw blade 1 and uploaded as feedback; the second is that the multi-vibration point acquisition component moves along the radial direction of the circular saw blade 1 driven by the holder 2, thereby expanding the range of vibration point monitoring of the circular saw blade 1 and improving the comprehensiveness of the vibration monitoring test; the third is that the multi-vibration point acquisition component rotates with the horizontal motor 3, and through rotation, it can maintain a relatively static or relatively low-speed state with the circular saw blade 1 at different speed differences, and can effectively and accurately monitor the vibration amplitude of the circular saw blade 1 under high-speed operation. The synchronous rotation of the horizontal motor 3 can ensure that the multi-vibration point acquisition component thereon maintains a relative speed difference with the circular saw blade 1, which is more conducive to testing the vibration balance of the circular saw blade 1 under high-speed conditions.

[0049] The three working states cooperate with each other to meet different testing needs. Fixed acquisition can obtain stable data at specific points, radial movement achieves full coverage, and rotation acquisition is suitable for high-speed circular saw blades 1, which improves the versatility and test accuracy of the equipment. When studying the vibration characteristics of the new circular saw blade 1, different working states of the acquisition components can be adjusted to simulate different usage scenarios, providing more comprehensive data support for the research and development and optimization of the circular saw blade 1.

[0050] Based on any of the above technical solutions, further optimization is that: a flange tube 4 is fixedly connected to the outer wall in the middle of the vertical part, the horizontal motor 3 can be fixed to the end of the flange tube 4, and the motor shaft of the horizontal motor 3 passes through the inner cavity of the flange tube 4 and movably extends into the positioning space and is fixedly connected to the center of the outer wall of the multi-vibration point acquisition component.

[0051] The flange tube 4 serves to fix the horizontal motor 3 , and the inner cavity inside the flange tube 4 can provide sufficient supporting length for the motor shaft.

[0052] On the basis of any of the above technical solutions, further optimization is that: the multi-vibration point acquisition component includes a vertical turntable 5 fixed on the end of the motor shaft of the horizontal motor 3, a vibration sensing group is installed in the middle of the inner wall of the vertical turntable 5 facing the circular saw blade 1, and acceleration sensing groups are symmetrically installed on the inner walls on both sides of the vibration sensing group, the vibration sensing group is used to test the vibration displacement of multiple points on the surface of the circular saw blade 1 in the operating state along the radial direction, and the acceleration sensing group is used to test the vibration acceleration of multiple points on the surface of the circular saw blade 1 in the operating state.

[0053] Based on any of the above technical solutions, further optimization is that: the vibration sensing group includes a plurality of laser displacement sensors 6 arranged along the radial direction of the vertical turntable 5, the laser displacement sensor 6 located in the middle is installed at the center of the vertical turntable 5, and the acceleration sensing group includes a plurality of laser Doppler vibration sensors 7 arranged at intervals, and each of the laser displacement sensors 6 and each of the laser Doppler vibration sensors 7 are perpendicular to the inner wall of the vertical turntable 5.

[0054] The laser displacement sensor 6 uses the laser ranging principle to measure the change in distance between each radial point on the surface of the circular saw blade 1 and the sensor, thereby obtaining vibration displacement data; the laser Doppler vibration sensor 7 detects the change in light frequency caused by the surface vibration of the circular saw blade 1 based on the Doppler effect, and obtains vibration acceleration data. Multiple laser displacement sensors 6 are arranged radially to fully cover the radial vibration displacement measurement of the circular saw blade 1; the laser Doppler vibration sensors 7 are arranged at intervals to improve the accuracy of acceleration measurement. The non-contact measurement method avoids interference with the circular saw blade 1 and ensures the authenticity of the measurement data. When detecting the circular saw blade 1 in a high temperature, high speed or dangerous environment, the non-contact sensor can complete the measurement without contacting the circular saw blade 1, ensuring the safety of the operator, and also preventing the sensor from being damaged by the harsh environment.

[0055] By monitoring the vibration amplitude and vibration acceleration of the circular saw blade 1, the working status of the circular saw blade 1 can be fully understood, potential problems can be discovered in time, and the safe, stable and efficient operation of the circular saw blade 1 can be ensured. It can also play an important role in fault diagnosis and equipment optimization.

[0056] The vibration amplitude reflects the maximum distance that the circular saw blade 1 deviates from the equilibrium position, and the vibration acceleration reflects the speed of change of the vibration speed. The combination of the two can present the vibration characteristics of the circular saw blade 1 from different angles, allowing users to fully understand the working status of the circular saw blade 1. When the circular saw blade 1 is cutting, a large vibration amplitude may lead to reduced cutting accuracy and rough incisions; if the vibration acceleration changes abnormally at the same time, it indicates that the circular saw blade 1 is unevenly stressed and aggravated by wear, and needs to be adjusted or replaced in time to avoid affecting the cutting quality and the life of the circular saw blade 1.

[0057] Different faults manifest themselves differently in vibration amplitude and acceleration. For example, if a crack appears in the circular saw blade 1, the vibration amplitude will gradually increase, and the frequency component of the vibration acceleration signal will also change. Comprehensive monitoring of the two can more sensitively capture subtle changes in the circular saw blade 1, discover potential faults in advance, prevent sudden failures, and reduce the risk of equipment downtime and maintenance costs.

[0058] According to the vibration amplitude and acceleration data, the design, manufacturing process and working parameters of the circular saw blade 1 can be optimized. If it is found that a certain type of circular saw blade 1 vibrates abnormally under specific working conditions, the structural design can be improved, the appropriate materials can be selected, and the dynamic balance performance can be improved; the speed and feed rate of the circular saw blade 1 can also be adjusted according to the monitoring results, so that the circular saw blade 1 works in the best state and the cutting efficiency and quality are improved.

[0059] In addition, the combination of vibration amplitude and acceleration data has the following advantages: Early fault warning has obvious advantages: In the early stage of some faults, the vibration amplitude does not change significantly, but the vibration acceleration may have abnormal fluctuations. The combination of the two can detect abnormalities in the embryonic stage of the fault, issue early warnings, buy time for equipment maintenance, achieve preventive maintenance, and reduce losses caused by sudden equipment failures.

[0060] Assisted diagnosis of complex faults: The causes of circular saw blade 1 faults are complex, and it is difficult to accurately determine them by monitoring a single parameter. Combining vibration amplitude and acceleration analysis can provide more fault characteristic information. By comparing the two sets of data under normal and fault conditions, a fault pattern library in this field is established, and pattern recognition technology is used to accurately diagnose the fault type and location, thereby improving the accuracy and reliability of fault diagnosis.

[0061] Improve the overall safety of the equipment: The circular saw blade 1 rotates at high speed, and abnormal vibration may cause safety accidents. Comprehensive monitoring of vibration amplitude and acceleration can grasp the safety status of the circular saw blade 1 in real time. Once the parameters exceed the safety range, it will immediately stop or alarm to prevent the circular saw blade 1 from breaking or falling off, thereby ensuring the personal safety of operators and the normal operation of equipment.

[0062] The present invention also provides a dynamic balance testing device for an electric saw blade component, comprising two dynamic balance testers symmetrically arranged at intervals, wherein the dynamic balance tester adopts the dynamic balance tester as described above, wherein the inner ends of the two dynamic balance testers are fixedly mounted on the ends of a first extension mechanism at their corresponding positions, the bottom of the first extension mechanism is fixed on a lifting platform 8, a first lifting mechanism is fixedly mounted on the bottom of the lifting platform 8, the bottom of the first lifting mechanism is fixed on the top of a test platform 9, and a control host 13 with a built-in controller is mounted at the top center of the test platform 9.

[0063] The dynamic balance tester is used to support, fix and adjust the current dynamic balance tester. According to the position of the circular saw blade 1, the height of the first lifting mechanism and the position of the first extension mechanism can be quickly adjusted to achieve the purpose of enabling the dynamic balance tester to run to a suitable position above the circular saw blade 1. At the same time, the dynamic balance tester can be controlled to rise and fall slightly as needed, so as to realize dynamic testing and monitoring of the circular saw blade 1 by the dynamic balance tester. The test information is uploaded to the controller in the existing control host 13 in real time for processing.

[0064] On the basis of any of the above technical solutions, further optimization is that: the middle part and both ends of the lifting platform 8 are folded vertically upward to form a shifting part 10 for fixing the first extending mechanism; the first extending mechanism includes two horizontal cylinders 11 that are horizontally spaced and synchronously extended, and the telescopic ends of the two horizontal cylinders 11 are movable to the outside of the lifting platform 8 and are fixedly connected to the side wall of the base 2; the first lifting mechanism includes a plurality of vertically arranged and synchronously lifted lifting cylinders 12, the top of each lifting cylinder 12 is fixed to the bottom of the lifting platform 8, and the bottom of each lifting cylinder 12 is fixed to the top of the test platform 9.

[0065] The shifting part 10 can ensure the stability of each horizontal cylinder 11 and prevent it from shifting left and right; in addition, the lifting action of each lifting cylinder 12 and the horizontal shifting action of each horizontal cylinder 11 can quickly drive each dynamic balance tester into place.

[0066] Embodiment 2: Compared with Embodiment 1, this embodiment is different in that it also includes the following technical features: The present invention also provides a method for testing the dynamic balance of a saw blade component, comprising the following steps: calibrating the equipment in place: installing the dynamic balance tester in place, adjusting the position of its holder 2, making the deviation between the center of the holder 2 and the center of the circular saw blade 1 ≤±1 mm, and ensuring that the horizontal error of the holder 2 is ≤±0.5°; calibrating the laser displacement sensor 6 and the laser Doppler vibration sensor 7 of the dynamic balance tester; accurately adjusting the position and sensor state of the dynamic balance tester to ensure that the test equipment can accurately measure the relevant parameters of the circular saw blade 1. The purpose of calibrating the sensor is to obtain an accurate initial measurement benchmark.

[0067] Start-up and collection settings: Start the circular saw blade 1 of the electric saw to the preset speed, and turn on the rotation test unit of the dynamic balance tester; set the multi-vibration point collection component to collect data in fixed, radial movement, and rotation modes; let the circular saw blade 1 operate at the preset speed, and use the rotation test unit of the dynamic balance tester in conjunction with the multi-vibration point collection component to collect vibration data of the circular saw blade 1 during operation in different modes.

[0068] Data acquisition and transmission: The vibration sensing group of the dynamic balance tester collects the vibration displacement data of the circular saw blade 1 at 100 Hz, and the acceleration sensing group collects the vibration acceleration data at 200 Hz; the data is cached after preliminary filtering, and transmitted to the control host 13 when it reaches 500 groups; the vibration displacement and acceleration data of the circular saw blade 1 are collected by using sensing groups of different frequencies, and preliminary filtering is performed to remove noise interference. After caching a certain amount of data, it is transmitted to the control host 13 for centralized processing and analysis.

[0069] Data analysis and judgment: The control host 13 performs noise reduction processing on the received data, conducts time domain and frequency domain analysis, and compares it with the standard database to judge the dynamic balance of the circular saw blade 1; during the analysis process, if a large number of circular saw blades 1 are found to have abnormal vibrations in certain specific frequency bands, it can be traced back to the design or manufacturing process of the electric saw, providing clues for optimizing the overall performance of the electric saw.

[0070] The control host 13 first performs noise reduction processing on the vibration displacement data and vibration acceleration data of the circular saw blade 1 collected from the dynamic balance tester to remove noise interference in the data to improve the data quality. Then, time domain analysis and frequency domain analysis are carried out respectively. The time domain analysis obtains the time history characteristics of the vibration of the circular saw blade 1 by observing the changes of the data over time; the frequency domain analysis converts the time domain data to the frequency domain, analyzes the distribution of the vibration signal on different frequency components, and obtains the frequency characteristics of the vibration.

[0071] After completing the above analysis, the control host 13 compares the analysis result with the pre-established standard database. The standard database stores various data indicators and characteristics of the circular saw blade 1 in a normal dynamic balance state. By comparison, it is determined whether the dynamic balance of the current circular saw blade 1 meets the standard requirements.

[0072] During the entire analysis process, if a large number of circular saw blades 1 are found to have abnormal vibrations in certain specific frequency bands, then based on these abnormal vibration data, they can be traced back to the design or manufacturing process of the electric saw. For example, it may be that the motor design of the electric saw causes resonance at a specific frequency, or that the manufacturing process of the circular saw blade 1 is not precise enough, resulting in uneven mass distribution of the circular saw blade 1, thereby causing abnormal vibrations in a specific frequency band. This reverse tracing can provide important clues for optimizing the overall performance of the electric saw, help improve the design and manufacturing process of the electric saw, and improve the quality and performance of electric saw products.

[0073] Report generation: Based on the analysis and judgment results, the control host 13 generates a test report, which includes circular saw blade 1 information, collected data, balance conclusions and adjustment suggestions.

[0074] On the basis of any of the above technical solutions, further optimization is as follows: During the equipment calibration stage, the test environment needs to be strictly controlled; high-precision thermometer and hygrometer and noise tester are used to monitor environmental parameters in real time; when the temperature exceeds the range of 20-30℃, it is adjusted by air conditioning cooling or heating; when the humidity is not in the range of 40%-60%, a dehumidifier or humidifier is used to adjust it; when the noise is higher than 60dB, a soundproof cover and sound-absorbing materials are used to reduce the noise. Ensure that the environment is stable to avoid interference with the sensor accuracy of the dynamic balance tester and the accuracy of the data collection of the circular saw blade 1.

[0075] The accuracy of the laser displacement sensor 6 and laser Doppler vibration sensor 7 of the dynamic balance tester is easily affected by environmental factors. Drastic changes in temperature and humidity may cause thermal expansion and contraction of sensor components, thereby changing the internal structure and measurement accuracy of the sensor; noise interference may cause the sensor to receive erroneous signals, affecting measurement accuracy. By strictly controlling the ambient temperature and humidity in the range of 20-30℃, 40%-60%, and noise below 60dB, the sensor can be ensured to work stably and output accurate and reliable measurement data, providing accurate basic data for subsequent dynamic balance tests of circular saw blades 1.

[0076] The vibration characteristics of the circular saw blade 1 may change under different environmental conditions. For example, a high temperature environment may change the mechanical properties of the circular saw blade 1 material, resulting in a change in the vibration response; a high humidity environment may cause the surface of the circular saw blade 1 to rust, affecting its mass distribution and vibration; noise interference may also mask the true vibration signal of the circular saw blade 1. Strictly controlling environmental parameters can eliminate the interference of these environmental factors on the collection of vibration data of the circular saw blade 1, so that the collected data truly reflects the dynamic balance characteristics of the circular saw blade 1 itself, ensuring the accuracy and reliability of the test results.

[0077] The stable test environment allows each test to be conducted under similar conditions, reducing the impact of environmental factors on the test results. This not only ensures the reliability of a single test result, but also makes the test results of circular saw blades 1 from different times and batches comparable. Based on these stable and reliable data, companies can effectively evaluate and monitor the quality of circular saw blades 1, promptly identify problems in the production process, and optimize the production process.

[0078] On the basis of any of the above technical solutions, further optimization is that each acquisition mode has precise requirements: In the fixed acquisition mode, the multi-vibration point acquisition component of the dynamic balance tester stays stably for 1-2 minutes to obtain the stable vibration characteristics of a specific position of the circular saw blade 1. During radial movement acquisition, the component moves from the inner edge to the outer edge of the circular saw blade 1 at a uniform speed of 0.2-0.3 cm / s, and collects data every 0.3 cm, covering the radial area of ​​the circular saw blade 1. In the rotation acquisition mode, the component rotates clockwise and counterclockwise for more than 1 minute at a speed of 1 / 4-1 / 3 of the speed of the circular saw blade 1, and obtains the vibration information of the circular saw blade 1 in all directions.

[0079] Fixed collection mode: Allow the multi-vibration point collection component to stay stably at a specific position for 1-2 minutes to obtain the stable vibration characteristics of the position over a period of time. The vibration conditions at different positions of the circular saw blade 1 may be different. This collection method can focus on a specific point to obtain stable and detailed vibration data, such as detecting whether there is abnormal vibration caused by manufacturing defects at a certain local position of the circular saw blade 1.

[0080] Radial movement acquisition: The component moves from the inner edge to the outer edge at a uniform speed of 0.2-0.3 cm / s, and collects data every 0.3 cm, which can systematically cover the radial area of ​​the circular saw blade 1. In this way, it is possible to fully understand the vibration changes of the circular saw blade 1 at different radial positions from the center to the edge, analyze the radial manifestation of the uneven mass distribution problem of the circular saw blade 1, and provide a basis for judging whether there are defects in the overall structure of the circular saw blade 1.

[0081] Rotation acquisition mode: The component rotates clockwise and counterclockwise at a speed of 1 / 4-1 / 3 of the speed of the circular saw blade 1 for more than 1 minute, and the vibration information of the circular saw blade 1 can be obtained in all directions. During the rotation of the circular saw blade 1, the vibration conditions at different angles may be different. This acquisition mode can capture the vibration differences of the circular saw blade 1 in all directions, detect whether the circular saw blade 1 has an eccentricity problem, and ensure a comprehensive evaluation of the dynamic balance of the circular saw blade 1.

[0082] Improve the accuracy and reliability of test results: Accurate acquisition parameter settings ensure the standardization and consistency of collected data. In the fixed acquisition mode, the specified dwell time ensures that sufficiently stable data is collected, reducing the influence of random factors; when collecting data in radial movement, the constant movement speed and collection spacing ensure the uniform distribution of data in the radial direction, avoiding data omission or excessive concentration; in the rotation acquisition mode, clear rotation speed and time requirements make the acquired omnidirectional vibration information more complete and accurate. All of these help to improve the accuracy and reliability of test results, and provide a solid data foundation for subsequent data analysis and dynamic balance judgment of circular saw blade 1.

[0083] Provide detailed data support for the performance optimization of the circular saw blade 1: The comprehensive and accurate vibration data collected can deeply analyze the performance characteristics of the circular saw blade 1. For example, by analyzing the radial movement collection data, it can be determined at which radial position the circular saw blade 1 vibrates more, so as to make targeted improvements to this area, such as adjusting the material distribution or optimizing the structural design; according to the data obtained by the rotation collection mode, the unbalanced point of the circular saw blade 1 during the rotation process can be found, providing accurate position information for balance correction, thereby improving the overall performance and service life of the circular saw blade 1.

[0084] Convenient for comparative analysis of test results of different circular saw blades 1: The unified acquisition mode requirements make the test data of different circular saw blades 1 comparable. Whether it is circular saw blades 1 produced in the same batch or similar circular saw blades 1 produced by different manufacturers, they can be tested and analyzed based on the same acquisition standards. This helps companies to compare and evaluate the quality of different circular saw blades 1, discover the differences in the design and manufacturing of circular saw blades 1, provide a reference for the quality control and improvement of circular saw blades 1, and also facilitate users to make more reasonable decisions when selecting circular saw blades 1.

[0085] On the basis of any of the above technical solutions, further optimization is that: data collection is equipped with a fault warning and processing mechanism. When the sensor of the dynamic balance tester fails or the collected circular saw blade 1 data is abnormal, the system immediately issues an audible and visual alarm. At the same time, the time of the fault, the fault sensor number, and the abnormal data characteristics are accurately recorded. For a faulty sensor, it automatically switches to a backup sensor to continue collecting; for abnormal data, data fitting and interpolation methods are used to correct or mark and remove them to ensure the reliability of the data and the accuracy of subsequent circular saw blade 1 analysis results.

[0086] When the sensor of the dynamic balance tester fails, it automatically switches to the backup sensor to continue collecting data. This ensures that the data collection process will not be interrupted by sensor failure and maintains the continuity of the data. When the circular saw blade 1 is subjected to long-term dynamic balance monitoring, continuous data collection is crucial. It can fully record the vibration conditions of the circular saw blade 1 at different times, provide a complete data chain for subsequent analysis, and avoid inaccurate analysis results due to missing data. For abnormal data, data fitting and interpolation methods are used to correct it, or outliers are marked and removed. This can effectively remove erroneous data caused by various reasons and improve data quality. For example, during the collection process, abnormal data points may be generated due to external electromagnetic interference. By correcting or eliminating these data, it is ensured that the remaining data can truly reflect the actual vibration conditions of the circular saw blade 1, making subsequent analysis based on these data more reliable.

[0087] The system will immediately send out an audible and visual alarm when a sensor fails or data is abnormal, so that the operator can know the problem immediately and take timely measures. At the same time, the system accurately records the time when the fault occurs, the fault sensor number, and the abnormal data characteristics, which is convenient for tracing the cause of the problem later. For example, by analyzing the test environment, equipment operating status, and abnormal data characteristics at the time of the fault, it can be determined whether it is a quality problem of the sensor itself, interference in the test environment, or a sudden abnormal condition of the circular saw blade 1, providing a strong basis for solving problems and optimizing test processes.

[0088] Reliable and continuous data is the basis for accurately analyzing the dynamic balance of the circular saw blade 1. This mechanism ensures data quality, so that the control host 13 can obtain more accurate results by performing time domain and frequency domain analysis based on these data and comparing with the standard database. Accurate analysis results help to correctly judge the dynamic balance of the circular saw blade 1, avoid misjudgment due to data problems, and provide reliable support for the maintenance, adjustment or scrapping decision of the circular saw blade 1.

[0089] On the basis of any of the above technical solutions, further optimization is that when the control host 13 performs data analysis, in addition to conventional time domain and frequency domain analysis, correlation analysis and trend analysis are also introduced. Correlation analysis determines the degree of correlation of vibrations at different points of the circular saw blade 1 by calculating the correlation coefficient, and finds out the potential vibration propagation path and influencing factors. Trend analysis models multiple circular saw blade 1 test data, analyzes the trend of vibration parameters over time, predicts the performance degradation and failure probability of the circular saw blade 1, and provides a scientific basis for the preventive maintenance of the circular saw blade 1.

[0090] Based on any of the above technical solutions, further optimization is as follows: after the test report is generated, it is automatically sent to the mailbox of the relevant personnel through a secure encrypted email system, and uploaded to the enterprise-level shared server at the same time, and different permissions are set for personnel to access. The report backup adopts a multi-copy storage strategy in different locations to ensure data security. Relevant personnel can log in to the system remotely to view the report, maintain the circular saw blade 1 according to the recommendations in the report, and use the dynamic balance tester to test again after the maintenance is completed. Compare the reports before and after to evaluate the maintenance effect, and continuously optimize the operating status of the circular saw blade 1.

[0091] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention. For those skilled in the art, any replacement, improvement or change made to the implementation mode of the present invention falls within the protection scope of the present invention.

[0092] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A dynamic balance tester for a saw blade component of an electric saw, wherein the saw blade component of the electric saw is a circular saw blade, characterized in that: The dynamic balance tester includes a holder that is cooperatively arranged on the upper part of the circular saw blade. The holder remains fixed in the working state. The vertical parts on both sides of the holder are respectively placed on both sides of the circular saw blade. A rotating test unit is respectively installed in the middle of each vertical part. The two rotating test units rotate synchronously in the working state. The two rotating test units are used to simultaneously collect the vibration amplitudes of multiple parts on the surface of both sides of the circular saw blade and feed back to the external control host.

2. The dynamic balance tester of a saw blade component of an electric saw according to claim 1, characterized in that: The rotation test unit includes a horizontal motor, a housing of the horizontal motor is fixed relative to the clamping seat, a motor shaft of the horizontal motor is movably extended into the clamping space between the two vertical parts, a multi-vibration point acquisition component is arranged in the clamping space, the outer side of the multi-vibration point acquisition component is fixed to the end of the motor shaft of the horizontal motor, and the two multi-vibration point acquisition components are respectively placed on both sides of the circular saw blade inside the clamping space.

3. The dynamic balance tester of a saw blade component of an electric saw according to claim 2, characterized in that: The horizontal motor drives the multi-vibration point acquisition component to complete periodic swing or rotation.

4. The dynamic balance tester of a saw blade component of an electric saw according to claim 2, characterized in that: A flange tube is fixedly connected to the outer wall in the middle of the vertical portion, and the horizontal motor can be fixed to the end of the flange tube. The motor shaft of the horizontal motor passes through the inner cavity of the flange tube and movably extends into the positioning space and is fixedly connected to the center of the outer wall of the multi-vibration point acquisition component.

5. The dynamic balance tester of a saw blade component of an electric saw according to claim 2, characterized in that: The multi-vibration point acquisition component includes a vertical turntable fixed to the end of the motor shaft of the horizontal motor, a vibration sensing group is installed in the middle of the inner wall of the vertical turntable facing the circular saw blade, and acceleration sensing groups are symmetrically installed on the inner walls on both sides of the vibration sensing group. The vibration sensing group is used to test the vibration displacement of multiple points on the surface of the circular saw blade in the radial direction when the circular saw blade is in operation, and the acceleration sensing group is used to test the vibration acceleration of multiple points on the surface of the circular saw blade when the circular saw blade is in operation.

6. The dynamic balance tester of a saw blade component of an electric saw according to claim 5, characterized in that: The vibration sensing group includes a plurality of laser displacement sensors arranged along the radial direction of the vertical turntable, and the laser displacement sensor located in the middle is installed at the center of the vertical turntable. The acceleration sensing group includes a plurality of laser Doppler vibration sensors arranged at intervals, and each of the laser displacement sensors and each of the laser Doppler vibration sensors are perpendicular to the inner wall of the vertical turntable.

7. A dynamic balance testing device for a saw blade component of an electric saw, characterized in that: It comprises two dynamic balance testers symmetrically spaced apart, the dynamic balance tester adopts the dynamic balance tester as described in claim 6, the inner ends of the two dynamic balance testers are fixedly mounted on the ends of the first extension mechanism at their corresponding positions, the bottom of the first extension mechanism is fixed on the lifting platform, the first lifting mechanism is fixedly mounted on the bottom of the lifting platform, the bottom of the first lifting mechanism is fixed on the top of the test platform, and a control host with a built-in controller is mounted at the top center of the test platform.

8. The testing device according to claim 7, characterized in that: The middle and both ends of the lifting platform are folded upward vertically to form a shifting portion for fixing the first extending mechanism; the first extending mechanism includes two horizontal cylinders that are horizontally spaced and synchronously extended, and the telescopic ends of the two horizontal cylinders are movable to the outside of the lifting platform and fixedly connected to the side walls of the base; the first lifting mechanism includes a plurality of vertically arranged and synchronously lifted lifting cylinders, the top of each lifting cylinder is fixed to the bottom of the lifting platform, and the bottom of each lifting cylinder is fixed to the top of the test platform.

9. A method for testing the dynamic balance of a saw blade component, characterized in that: The steps include: Equipment calibration: install the dynamic balance tester in place and adjust its holder position; calibrate the laser displacement sensor and laser Doppler vibration sensor of the dynamic balance tester; Start and collect settings: Start the circular saw blade of the electric saw to the preset speed, and turn on the rotating test unit of the dynamic balance tester; Set the multi-vibration point acquisition component to collect data in fixed, radial movement, and rotation modes; Data collection and transmission: The vibration sensing group of the dynamic balance tester collects the vibration displacement data of the circular saw blade, and the acceleration sensing group collects the vibration acceleration data; the data is cached after preliminary filtering, and transmitted to the control host when it reaches 500 groups; Data analysis and judgment: The control host performs noise reduction processing on the received data, conducts time domain and frequency domain analysis, and compares it with the standard database to judge the dynamic balance of the circular saw blade; Report generation: Based on the analysis and judgment results, the control host generates a test report, which includes circular saw blade information, collected data, balance conclusions and adjustment suggestions.

Images