A portable multi-purpose saw adaptive control method and multi-purpose saw

Abstract

The application discloses a kind of portable multi-purpose saw self-adapting control method and multi-purpose saw, it is related to multi-purpose saw technical field, comprising: S1, equipment assembly, rigid installation of standard specification saw blade is in the output end of adjusting part and drives saw blade to extend corresponding length;S2, guide calibration, telescopic member drives guide frame to move along the direction of saw blade, and calibrates guide support point position;S3, start-stop drive, the drive part of saw body side receives start signal and drives adjusting part and saw blade high-frequency reciprocating linear motion;S4, drive cutting, control saw blade close to workpiece, and guide frame and saw blade are extruded each other;S5, parameter acquisition, saw blade moves downward and applies cutting to workpiece with pressure;S6, self-adapting adjustment, according to the workpiece position parameter collected, adjust saw blade extension length, calibrate guide support point position, according to each parameter change judges saw blade fault state, executes self-adapting adjustment strategy, can improve the flatness and accuracy of hand-held cutting.

Description

Technical Field

[0001] This invention relates to the field of multi-purpose saw technology, and in particular to an adaptive control method for a handheld multi-purpose saw and the multi-purpose saw itself. Background Technology

[0002] Handheld multi-purpose saws are handheld electric cutting tools widely used in building demolition, pipe processing, and garden trimming. They rely on a transmission mechanism to convert the rotational motion of the motor into the linear reciprocating motion of the saw blade, enabling the cutting of workpieces such as wood, metal pipes, plastics, and composite materials. Existing reciprocating saws generally use a crank eccentric connecting rod and cam transmission structure to drive the reciprocating component, with the help of a counterweight. The saw blade is fixed to the front end of the reciprocating component by a chuck for driving the cutting.

[0003] Chinese Patent Publication No. CN121200156A discloses a multi-purpose saw, including a center saw, a saw blade, upper saw teeth disposed on the top of the saw blade, lower saw teeth disposed on the bottom of the saw blade, a first file disposed on the front of the saw blade, a second file disposed on the back of the saw blade, and fixing grooves symmetrically opened in the saw blade. The width and number of the file teeth on the first file and the second file are different.

[0004] The above-mentioned technical solutions have some problems in use. Most handheld multi-purpose saws have a fixed guide structure. When the working position of the saw blade is far away, the distance between the force point of the saw blade and the fixed position is far, which can easily cause the saw blade to tilt. When the support position is adjusted by the guide frame, the saw blade is prone to angular deviation and excessive friction with the top or side of the guide frame, which affects the normal reciprocating linear movement accuracy of the saw blade.

[0005] Common multi-purpose saws only have a simple overload shutdown function, but they cannot accurately identify and distinguish various saw blade faults and operational abnormalities. They lack a layered early warning mechanism, making it difficult for operators to quickly locate the cause of the fault. They are also not capable of adapting to complex handheld cutting scenarios, which reduces overall work efficiency.

[0006] Therefore, it is necessary to invent an adaptive control method for a handheld multi-purpose saw and a multi-purpose saw to solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide an adaptive control method for a handheld multi-purpose saw and a multi-purpose saw, so as to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an adaptive control method for a handheld multi-purpose saw, comprising the following steps: S1. Equipment assembly: Rigidly install the standard-specification saw blade onto the output end of the adjustment unit and drive the saw blade to extend the corresponding length. S2. Guiding calibration: The telescopic component drives the guide frame to move along the saw blade direction to calibrate the guide support points. S3, Start-stop drive: The drive unit on the side of the saw body receives the start signal and drives the adjustment unit and the saw blade to reciprocate linearly at high frequency. S4. Drive the cutting process, control the saw blade to be close to the workpiece, and the guide frame and saw blade squeeze each other. S5. Parameter acquisition: The saw blade moves downward and applies downward pressure to the workpiece for cutting. The resistance sensor detects the lateral feed resistance value of the drive unit, the vertical feed distance sensor detects the vertical feed distance value of the saw blade per unit time and obtains the vertical feed rate, and the vertical feed distance sensor detects the total feed distance value of the saw blade, the pressure sensor detects the vertical pressure value between the saw blade and the guide frame, and the temperature sensor detects the surface temperature value of the saw blade and constructs a parameter set. S6. Adaptive adjustment: Based on the parameter set, an adaptive adjustment strategy is executed.

[0009] Preferably, the adaptive adjustment strategy includes: When the resistance sensor at the output end of the drive unit detects that the resistance value is greater than the preset resistance value and the vertical feed rate is greater than the maximum preset vertical feed rate, an overpressure alarm is executed and the downward pressure is adjusted, and then S5 is repeated. When the resistance sensor at the output end of the drive unit detects that the resistance value is greater than the preset resistance value, and the vertical feed rate is less than the maximum preset vertical feed rate but greater than the minimum preset vertical feed rate, the first strategy is executed. When the resistance sensor at the output of the drive unit detects that the resistance value is greater than the preset resistance value and the vertical feed rate is less than the minimum preset vertical feed rate, the second strategy is executed.

[0010] Preferably, the adaptive adjustment strategy further includes: When the resistance sensor at the output end of the drive unit detects that the resistance value is less than or equal to the preset resistance value and the vertical feed rate is greater than the maximum preset vertical feed rate, the third strategy is executed. When the resistance sensor at the output end of the drive unit detects that the resistance value is less than or equal to the preset resistance value, and the vertical feed rate is less than the maximum preset vertical feed rate but greater than the minimum preset vertical feed rate, S5 is repeated. When the resistance sensor at the output end of the drive unit detects that the resistance value is less than or equal to the preset resistance value and the vertical feed rate is less than the minimum preset vertical feed rate, the saw blade wear alarm is executed and the saw blade is replaced, and then the process of S5 is repeated.

[0011] Preferably, the first strategy includes: When the pressure sensor detects that the vertical pressure value is greater than the preset pressure value, the vertical tilt alarm of the saw blade is triggered, the guide frame moves towards the front end of the saw blade and squeezes the saw blade, and the above S5 is repeated. When the pressure sensor at the top of the saw blade detects a pressure value less than or equal to a preset pressure value, the fourth strategy is executed.

[0012] Preferably, the fourth strategy includes: When the temperature sensor detects that the saw blade temperature is greater than the preset temperature value, a saw blade lateral tilt alarm is triggered, the guide frame moves towards the front end of the saw blade and squeezes the saw blade, and the S5 process is repeated. When the temperature sensor detects that the saw blade temperature is less than or equal to the preset temperature value, the fifth strategy is executed.

[0013] Preferably, the fifth strategy includes: Increase the output power of the drive unit and drive the adjustment unit and saw blade to increase the reciprocating cutting speed. When the resistance sensor at the output end of the drive unit detects that the resistance value is less than or equal to the preset resistance value, repeat step S5. When the resistance sensor at the output end of the drive unit detects that the resistance value is greater than the preset resistance value, the saw blade jamming alarm is executed and the workpiece is adjusted to cut a slit, and then the S5 process is repeated.

[0014] Preferably, the second strategy includes: Increase the output power of the drive unit and drive the adjustment unit and saw blade to increase the reciprocating cutting speed. When the vertical feed rate is less than the maximum preset vertical feed rate but greater than the minimum preset vertical feed rate, repeat step S5. When the vertical feed rate is less than the minimum preset vertical feed rate, a jamming alarm is triggered and the machine stops. Then, the telescopic component drives the guide frame to move to the farthest end for auxiliary tool retraction.

[0015] Preferably, the third strategy includes: When the total vertical feed distance of the saw body is less than the total distance of the workpiece, an over-distance alarm is triggered and the saw body is moved toward the workpiece. Then, S5 is repeated. When the total vertical feed distance of the saw body is greater than the total distance of the workpiece, the machine will stop.

[0016] A multi-purpose saw, wherein the multi-purpose saw is adaptively controlled using the aforementioned adaptive control method for a handheld multi-purpose saw, includes a saw body and a saw blade, and further includes: The drive unit, whose input end is fixedly installed inside the saw body; The adjustment unit has its fixed end fixedly connected to the output end of the drive unit, and the output end is fixedly installed to one end of the saw blade. The saw blade cuts the workpiece from below. The drive unit drives the adjustment unit and the saw blade to perform high-frequency reciprocating linear motion and reciprocate cutting of the workpiece. The adjustment unit controls the extension length of the drive saw blade.

[0017] Preferably, a telescopic component is fixedly connected to the end of the saw body, and a guide frame is fixedly connected to the telescopic end of the telescopic component. The guide frame is located on the top side of the saw blade and guides and supports the reciprocating linear movement of the saw blade. A resistance sensor is provided at the output end of the drive unit, a pressure sensor and a temperature sensor are provided at the inner bottom of the guide frame, and a vertical feed distance sensor is provided at the bottom of the guide frame.

[0018] The technical effects and advantages of this invention are as follows: 1. In this invention, the adjustment part can adjust the extension length of the saw blade to adapt to the cutting requirements of workpieces of different specifications. At the same time, the telescopic part drives the guide frame to move along the extension direction of the saw blade, calibrates the guide support point, and improves the flatness and accuracy of hand-held cutting.

[0019] 2. In this invention, a comprehensive working condition detection closed loop replaces the single operation mode of constant power and constant speed of traditional equipment. Relying on a multi-level adaptive control strategy, the output power of the drive unit and the reciprocating speed of the saw blade are dynamically adjusted according to the cutting working condition and the state of exceeding the standard.

[0020] 3. In this invention, by linking multiple parameters such as resistance, feed rate, pressure, temperature and distance, different fault states such as saw blade wear, saw blade loosening, saw blade tilting, excessive cutting distance, workpiece being too hard, and debris retention can be accurately identified, and corresponding exclusive alarm prompts and control strategies can be triggered.

[0021] 4. In this invention, a linkage structure of drive unit, adjustment unit, telescopic component and guide frame is adopted. During operation, saw blade length adjustment, guide support positioning and power output speed adjustment are synchronized throughout the process, continuously improving the overall efficiency of long-term operation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the method flow of the present invention; Figure 2 This is a schematic diagram of the saw body structure of the present invention; Figure 3 This is a schematic diagram of the saw blade structure of the present invention; Figure 4 This is a schematic diagram of the guide frame structure of the present invention.

[0023] In the diagram: 1. Saw body; 2. Drive unit; 3. Adjustment unit; 4. Saw blade; 5. Telescopic component; 6. Guide frame. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1 Most handheld multi-purpose saws have a fixed guide structure. During the cutting process, the saw blade 4 is limited only by its own structure. When the working position of the saw blade 4 is far away, the distance between the force point of the saw blade 4 and the fixed position is also far, resulting in the tilting of the saw blade 4. When adjusting the support position through the guide frame 6, the saw blade 4 is prone to angular deviation and excessive friction with the top or side of the guide frame 6, affecting the normal reciprocating linear movement accuracy of the saw blade 4. This leads to uneven cuts and excessive cutting size deviations, significantly reducing the accuracy of handheld cutting operations and failing to meet the needs of fine cutting. Common multi-purpose saws only have a simple overload stop function and cannot accurately identify and distinguish various saw blade 4 malfunctions and operational abnormalities. They lack a layered warning mechanism, making it difficult for operators to quickly locate the cause of the malfunction. They are not adaptable to complex handheld cutting scenarios and reduce overall work efficiency.

[0026] This invention provides, for example Figures 1 to 4 The diagram illustrates an adaptive control method for a portable multi-purpose saw and the multi-purpose saw itself. The adaptive control method for the multi-purpose saw includes the following steps: S1. Equipment assembly: The standard-specification saw blade 4 is rigidly installed on the output end of the adjustment unit 3. It is fixed to the power output end of the adjustment unit 3 using a rigid locking assembly method. The initial calibration of the saw blade 4 is completed to ensure that the installation accuracy of the saw blade 4 meets the benchmark requirements of industrial cutting operations. The position parameters of the workpiece are collected by the distance sensor. The adjustment unit 3 drives the saw blade 4 to extend the corresponding length. The precise action of the adjustment unit 3 controls the saw blade 4 to adaptively extend the corresponding cutting length, matching the workpiece cutting conditions and avoiding the problems of excessive wear and tear or cutting failure due to excessive extension of the saw blade 4.

[0027] S2. Guide calibration: The telescopic component 5 drives the guide frame 6 to move along the direction of the saw blade 4, calibrating the guide support point. The telescopic component 5 is activated to drive the guide frame 6 to make precise linear displacement adjustment along the axial cutting direction of the saw blade 4, calibrating the contact point and support benchmark between the guide frame 6 and the saw blade 4, ensuring stable cutting guide support stability.

[0028] S3, Start and stop drive: The drive unit 2 on the side of the saw body 1 receives the start signal and drives the adjustment unit 3 and the saw blade 4 to perform high-frequency reciprocating linear motion. The operator starts the switch to enable the drive unit 2 integrated on one side of the saw body 1 to start the operation command and output the rated drive power. The drive unit 2 drives the adjustment unit 3 and the fixedly connected saw blade 4 to perform high-frequency constant amplitude reciprocating linear cutting motion.

[0029] S4 drives the cutting process, controlling the saw blade 4 to approach the workpiece. The guide frame 6 and the saw blade 4 press against each other, and the saw blade 4 precisely fits the workpiece along the preset cutting trajectory. During the operation, the guide frame 6 and the saw blade 4 continuously press against each other to counteract cutting vibrations and ensure a constant cutting posture.

[0030] S5. Parameter acquisition: The saw blade 4 moves downward and applies downward pressure to the workpiece for cutting. The resistance sensor detects the lateral feed resistance value of the drive unit 2, the vertical feed distance sensor detects the vertical feed distance value of the saw blade 4 per unit time and obtains the vertical feed rate, and the vertical feed distance sensor detects the total feed distance value of the saw blade 4. The pressure sensor detects the vertical pressure value between the saw blade 4 and the guide frame 6, and the temperature sensor detects the surface temperature value of the saw blade 4, and constructs a parameter set.

[0031] S6. Adaptive adjustment: Based on the parameter set, an adaptive adjustment strategy is executed. The adaptive adjustment strategy is combined with the above data to determine and realize the dynamic closed loop of the cutting condition.

[0032] A multi-purpose saw is provided, which is adaptively controlled by a handheld multi-purpose saw adaptive control method. It includes a saw body 1 and a saw blade 4, and also includes a drive unit 2, the input end of which is fixedly installed inside the saw body 1.

[0033] The adjusting unit 3 has its fixed end fixedly connected to the output end of the driving unit 2, and its output end fixedly installed on one end of the saw blade 4. The saw blade 4 cuts the workpiece from below. The driving unit 2 drives the adjusting unit 3 and the saw blade 4 to perform high-frequency reciprocating linear motion and reciprocate cutting of the workpiece. The adjusting unit 3 controls the extension length of the driving saw blade 4. According to the collected workpiece parameters, the adjusting unit 3 automatically controls the driving saw blade 4 to complete the extension and retraction adjustment, and precisely adjusts the extension length of the saw blade 4.

[0034] A telescopic component 5 is fixedly connected to the end of the saw body 1. A guide frame 6 is fixedly connected to the telescopic end of the telescopic component 5. The guide frame 6 is located on the top side of the saw blade 4 and guides and supports the reciprocating linear movement of the saw blade 4. A resistance sensor is installed at the output end of the drive unit 2. A pressure sensor and a temperature sensor are installed at the inner bottom of the guide frame 6. A vertical feed distance sensor is installed at the bottom of the guide frame 6. When the telescopic component 5 starts to run, it drives the guide frame 6 to move synchronously along the extension direction of the saw blade 4, following the telescopic stroke of the saw blade 4. The support point of the guide frame 6 is calibrated in real time.

[0035] In summary, before use, the equipment must be assembled. Select a standard-sized saw blade 4 and rigidly and securely install the saw blade 4 at the output end of the adjustment unit 3. Ensure that the saw blade 4 is installed firmly, without looseness or offset, and ensure that the saw blade 4 and the transmission structure of the adjustment unit 3 are precisely connected. This provides a stable structural foundation for subsequent high-frequency reciprocating cutting and precise length adjustment, and prevents cutting failures caused by loose assembly.

[0036] After the equipment is assembled, it enters the pre-cutting adjustment process. Through the vertical feed distance sensor, key parameters such as the position and distance of the workpiece are collected to accurately identify the workpiece specifications and cutting position. Based on the collected workpiece parameters, the automatic control adjustment unit 3 drives the saw blade 4 to complete the extension and retraction adjustment, accurately adjusting the extension length of the saw blade 4 so that the extension size of the saw blade 4 matches the thickness of the workpiece and the cutting distance requirements, thus completing the size adaptation adjustment before cutting.

[0037] During the synchronous process of the adjustment unit 3 driving the saw blade 4 to extend and retract and adjust the extension length, the telescopic component 5 starts to operate synchronously. Following the extension stroke of the saw blade 4, it drives the guide frame 6 to move synchronously along the extension direction of the saw blade 4, and calibrates the support point of the guide frame 6 in real time, so that the guide frame 6 always corresponds to the working position of the saw blade 4. This provides accurate and close-fitting guidance and support for the subsequent high-frequency reciprocating motion of the saw blade 4, eliminates the hidden dangers of cantilever swaying and deviation of the saw blade 4, and ensures the regularity of the cutting trajectory.

[0038] After size adjustment and guide calibration are completed, the equipment start signal is triggered. The drive unit 2, which is installed on the side of the saw body 1, receives the start command, continuously outputs power and synchronously drives the adjustment unit 3 and the fixedly installed saw blade 4 to perform high-frequency reciprocating linear motion, so that the equipment enters a stable cutting operation condition and provides continuous and stable power output for workpiece cutting.

[0039] During normal operation and cutting, the system adjusts the working status of saw blade 4 in real time, controls saw blade 4 to work in contact with the surface of the workpiece, and keeps the contact pressure between saw blade 4 and workpiece stable within a preset constant range throughout the process. With the extension length and guide support structure adapted in the early stage, combined with the equipment's adaptive control logic, the continuous, stable and precise cutting operation of the workpiece is completed smoothly.

[0040] Example 2 Based on the above embodiments, the saw blade 4 is easily affected by multiple factors such as differences in workpiece material, manual feed deviation, equipment vibration and wear, poor heat dissipation during cutting, and obstructed chip removal. This can easily lead to a series of working conditions such as cutting deviation, jamming, pressure overload, saw blade 4 wear, and substandard cutting accuracy. Overpressure directly results in deviation of cutting straightness or scrapping of workpieces. Long-term use leads to a sharp drop in work efficiency.

[0041] To address the above issues, adaptive adjustment strategies include: When the resistance sensor at the output end of the drive unit 2 detects that the resistance value is greater than the preset resistance value and the vertical feed rate is greater than the maximum preset vertical feed rate, an overpressure alarm is triggered and the downward pressure is adjusted before repeating S5.

[0042] If the resistance and vertical feed rate of the saw blade 4 are too high or abnormal during the reciprocating cutting process, and the excessive downward pressure causes the equipment to be in an overload and overfeed condition, then an alarm signal needs to be issued to simultaneously reduce the vertical pressure of the saw blade 4. After the pressure is calibrated, the S5 cycle control should be repeated.

[0043] When the resistance sensor at the output end of the drive unit 2 detects that the resistance value is greater than the preset resistance value, and the vertical feed rate is less than the maximum preset vertical feed rate but greater than the minimum preset vertical feed rate, the first strategy is executed.

[0044] If the resistance value encountered by saw blade 4 during reciprocating cutting is abnormal while the vertical feed rate is normal, the equipment is in a high-resistance steady-state feed condition. Further judgment is needed to determine the cause of the abnormal resistance, and the first strategy should be implemented for further judgment.

[0045] The first strategy includes: when the pressure sensor detects that the vertical pressure value is greater than the preset pressure value, the vertical tilt alarm of the saw blade 4 is executed, the guide frame 6 moves towards the front end of the saw blade 4 and squeezes the saw blade 4, and the S5 cycle control is repeated.

[0046] If the saw blade 4 is determined to have a vertical upward offset or tilt, a vertical tilt fault alarm is immediately triggered. Simultaneously, the telescopic component 5 drives the guide frame 6 to precisely displace the saw blade 4 at the front end. The verticality of the saw blade 4 is corrected by mechanical compression to ensure that the pressure of the saw blade 4 is normal and that it can cut normally. After the saw blade 4 returns to the standard tolerance range, the S5 cycle control is repeated.

[0047] When the pressure sensor on top of saw blade 4 detects that the pressure value is less than the preset pressure value, the fourth strategy is executed.

[0048] If the vertical direction of saw blade 4 is determined to be normal and there is no vertical offset fault, switch to the fourth strategy for in-depth working condition investigation and control.

[0049] The fourth strategy includes: when the temperature sensor detects that the temperature value of the saw blade 4 is greater than the preset temperature value, the saw blade 4 is tilted laterally and an alarm is triggered. The guide frame 6 moves towards the front end of the saw blade 4 and squeezes the saw blade 4 to restore it, and then the S5 cycle control is repeated.

[0050] If the lateral sway or tilt causes the saw blade 4 to heat up due to high-speed friction, the lateral tilt fault alarm will be triggered immediately. The guide frame 6 will be controlled to move towards the front end of the saw blade 4 and squeeze the saw blade 4. The lateral posture of the saw blade 4 will be corrected by mechanical limit squeezing to ensure that the pressure of the saw blade 4 is normal and that it can cut normally. After the posture of the saw blade 4 is reset to the standard, the S5 cycle control will be repeated.

[0051] When the temperature sensor detects that the temperature value of saw blade 4 is less than or equal to the preset temperature value, the fifth strategy is executed.

[0052] If the saw blade 4 is determined to have a normal temperature and operating condition but a lateral tilting fault, switch to executing the fifth strategy.

[0053] The fifth strategy includes: increasing the output power of the drive unit 2 and increasing the reciprocating cutting speed of the adjustment unit 3 and the saw blade 4. When the resistance sensor at the output end of the drive unit 2 detects that the resistance value is less than the preset resistance value, the S5 cycle control is repeated.

[0054] If the machine is found to be unable to cut properly due to insufficient reciprocating cutting speed of saw blade 4, the cause of this situation may be that cutting debris is excessively retained in the workpiece cutting gap and chip removal is not smooth, or the hardness of the workpiece is increased. In this case, there is no need to stop the machine. Simply increase the reciprocating speed of saw blade 4 to solve the problem. Then continue to execute the S5 cycle control.

[0055] When the resistance sensor at the output end of the drive unit 2 detects that the resistance value is greater than the preset resistance value, the saw blade 4 is stuck and the workpiece is adjusted to cut the gap, and the S5 cycle control is repeated.

[0056] If the abnormal resistance value is determined to be caused by the saw blade 4 cutting jam, and the problem cannot be solved by increasing the reciprocating speed of the saw blade 4, the workpiece will rub excessively against the side of the saw blade 4, and the jamming fault alarm will be triggered immediately. At the same time, the operator will apply external force to pry open the cutting gap of the workpiece and repeat the S5 cycle control.

[0057] When the resistance sensor at the output end of the drive unit 2 detects that the resistance value is greater than the preset resistance value and the vertical feed rate is less than the minimum preset vertical feed rate, the second strategy is executed.

[0058] If the resistance value encountered by saw blade 4 during reciprocating cutting is abnormal and the vertical feed rate is too low, it is determined that the equipment is in a high resistance feed condition and the second strategy is executed for control.

[0059] The second strategy includes: increasing the output power of the drive unit 2 and increasing the reciprocating cutting speed of the adjustment unit 3 and the saw blade 4; when the vertical feed rate is less than the maximum preset vertical feed rate but greater than the minimum preset vertical feed rate, the S5 cycle control is repeated.

[0060] If the reciprocating cutting speed of saw blade 4 is insufficient, it may be due to the presence of cutting debris trapped in the workpiece's cutting gap or the workpiece's hardness exceeding the standard, resulting in excessive cutting resistance of saw blade 4 and abnormal vertical feed rate. Increasing the reciprocating speed can adapt to the cutting conditions of high-hardness workpieces, and the S5 cycle control can be repeated.

[0061] When the vertical feed rate is less than the minimum preset vertical feed rate, a jam alarm is triggered and the machine stops. Then, the telescopic component 5 drives the guide frame 6 to move to the farthest end for auxiliary tool retraction.

[0062] If the abnormal feed rate is determined to be caused by the cutting jam of the equipment, and the problem cannot be solved by increasing the reciprocating speed, the jamming fault alarm is immediately triggered and an emergency stop and lock protection is executed. After the machine stops, the telescopic component 5 drives the guide frame 6 to move to the far end of the maximum stroke. The pressure between the guide frame 6 and the side wall of the workpiece increases, and the saw blade 4 is assisted in retracting to release the cutting gap, so as to avoid the saw blade 4 being deformed and damaged by pressure, and to facilitate the jamming of the saw blade 4 and its removal.

[0063] When the resistance sensor at the output end of the drive unit 2 detects that the resistance value is less than or equal to the preset resistance value and the vertical feed rate is greater than the maximum preset vertical feed rate, the third strategy is executed.

[0064] This indicates that the system is in an overfeed condition. The resistance value experienced by the saw blade 4 during the reciprocating cutting process is normal, but the vertical feed rate is too high. The third strategy is then executed to further determine the condition.

[0065] The third strategy includes: when the total vertical feed distance of saw body 1 is less than the total distance of the workpiece, an over-distance alarm is triggered and saw body 1 is moved toward the workpiece, and then the S5 cycle control is repeated.

[0066] If the saw body 4 is found to have not completed the cut but has detached from the workpiece, an alarm for excessive travel is triggered. The saw body 1 needs to be moved towards the workpiece cutting reference direction, and the saw blade 4 will continue to cut the workpiece. The S5 cycle control is then repeated.

[0067] When the total vertical feed distance of saw body 1 is greater than the total distance of the workpiece, the machine will stop.

[0068] Once the workpiece cutting operation is determined to be complete, the system will automatically stop and power off, ending the current cutting operation process.

[0069] When the resistance sensor at the output end of the drive unit 2 detects that the resistance value is less than or equal to the preset resistance value, and the vertical feed rate is less than the maximum preset vertical feed rate but greater than the minimum preset vertical feed rate, the S5 cycle control is repeated.

[0070] If the resistance value and vertical feed rate of the saw blade 4 are normal during the reciprocating cutting process, the equipment is determined to be in standard steady-state cutting condition, and the S5 cycle control is repeated.

[0071] When the resistance sensor at the output end of the drive unit 2 detects that the resistance value is less than or equal to the preset resistance value and the vertical feed rate is less than the minimum preset vertical feed rate, the saw blade 4 wear alarm is executed and the saw blade 4 is replaced. Then, the S5 cycle control is repeated.

[0072] If the saw blade 4 is found to have worn cutting performance, and the resistance and vertical feed rate during the reciprocating cutting process are both too low, the saw blade 4 wear fault alarm will be triggered immediately, prompting the operator to replace the saw blade 4 with a standard specification. After the replacement is completed and the equipment is re-inspected and calibrated, the S5 cycle control will be repeated.

[0073] The adaptive control method of the multi-purpose saw is repeatedly used to control the multi-purpose saw, ensuring the continuous and stable cutting process of the multi-purpose saw.

[0074] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An adaptive control method for a handheld multi-purpose saw, characterized in that, Includes the following steps: S1. Equipment assembly: Rigidly install the standard-specification saw blade (4) on the output end of the adjustment unit (3) and drive the saw blade (4) to extend to the corresponding length; S2. Guide calibration: The telescopic component (5) drives the guide frame (6) to move along the direction of the saw blade (4) to calibrate the guide support point. S3, start and stop drive, the drive part (2) on the side of the saw body (1) receives the start signal and drives the adjustment part (3) and the saw blade (4) to perform high-frequency reciprocating linear motion; S4. Drive the cutting, control the saw blade (4) to be close to the workpiece, and the guide frame (6) and the saw blade (4) squeeze each other; S5. Parameter acquisition: The saw blade (4) moves downward and applies downward pressure to the workpiece for cutting. The resistance sensor detects the lateral feed resistance value of the drive unit (2), the vertical feed distance sensor detects the vertical feed distance value of the saw blade (4) per unit time and obtains the vertical feed rate, and the vertical feed distance sensor detects the total feed distance value of the saw blade (4), the pressure sensor detects the vertical pressure value between the saw blade (4) and the guide frame (6), the temperature sensor detects the surface temperature value of the saw blade (4), and constructs a parameter set. S6. Adaptive adjustment: Based on the parameter set, an adaptive adjustment strategy is executed.

2. The adaptive control method for a handheld multi-purpose saw according to claim 1, characterized in that, Adaptive adjustment strategies include: When the resistance sensor at the output end of the drive unit (2) detects that the resistance value is greater than the preset resistance value and the vertical feed rate is greater than the maximum preset vertical feed rate, an overpressure alarm is executed and the downward pressure is adjusted, and then S5 is repeated. When the resistance sensor at the output end of the drive unit (2) detects that the resistance value is greater than the preset resistance value and the vertical feed rate is less than the maximum preset vertical feed rate but greater than the minimum preset vertical feed rate, the first strategy is executed. When the resistance sensor at the output end of the drive unit (2) detects that the resistance value is greater than the preset resistance value and the vertical feed rate is less than the minimum preset vertical feed rate, the second strategy is executed.

3. The adaptive control method for a handheld multi-purpose saw according to claim 2, characterized in that, Adaptive adjustment strategies also include: When the resistance sensor at the output end of the drive unit (2) detects that the resistance value is less than or equal to the preset resistance value and the vertical feed rate is greater than the maximum preset vertical feed rate, the third strategy is executed. When the resistance sensor at the output end of the drive unit (2) detects that the resistance value is less than or equal to the preset resistance value, and the vertical feed rate is less than the maximum preset vertical feed rate but greater than the minimum preset vertical feed rate, S5 is repeated. When the resistance sensor at the output end of the drive unit (2) detects that the resistance value is less than or equal to the preset resistance value and the vertical feed rate is less than the minimum preset vertical feed rate, the saw blade (4) wear alarm is executed and the saw blade (4) is replaced, and then the S5 is repeated.

4. The adaptive control method for a handheld multi-purpose saw according to claim 2, characterized in that, The first strategy includes: When the pressure sensor detects that the vertical pressure value is greater than the preset pressure value, the vertical tilt alarm of the saw blade (4) is executed, the guide frame (6) moves towards the front end of the saw blade (4) and squeezes the saw blade (4), and the above S5 is repeated. When the pressure sensor at the top of the saw blade (4) detects a pressure value less than or equal to the preset pressure value, the fourth strategy is executed.

5. The adaptive control method for a handheld multi-purpose saw according to claim 4, characterized in that, The fourth strategy includes: When the temperature sensor detects that the temperature value of the saw blade (4) is greater than the preset temperature value, the saw blade (4) is tilted laterally and an alarm is triggered. The guide frame (6) moves towards the front end of the saw blade (4) and squeezes the saw blade (4). The S5 is repeated. When the temperature sensor detects that the temperature value of the saw blade (4) is less than or equal to the preset temperature value, the fifth strategy is executed.

6. The adaptive control method for a handheld multi-purpose saw according to claim 5, characterized in that, The fifth strategy includes: Increase the output power of the drive unit (2) and drive the adjustment unit (3) and saw blade (4) to increase the reciprocating cutting speed. When the resistance sensor at the output end of the drive unit (2) detects that the resistance value is less than or equal to the preset resistance value, repeat the execution of S5. When the resistance sensor at the output end of the drive unit (2) detects that the resistance value is greater than the preset resistance value, the saw blade (4) is jammed and the workpiece is adjusted to cut the gap, and then the S5 is repeated.

7. The adaptive control method for a handheld multi-purpose saw according to claim 3, characterized in that, The second strategy includes: Increase the output power of the drive unit (2) and drive the adjustment unit (3) and saw blade (4) to increase the reciprocating cutting speed. When the vertical feed rate is less than the maximum preset vertical feed rate but greater than the minimum preset vertical feed rate, repeat the above S5. When the vertical feed rate is less than the minimum preset vertical feed rate, a jamming alarm is triggered and the machine stops. Then, the telescopic component (5) drives the guide frame (6) to move to the farthest end for auxiliary tool retraction.

8. The adaptive control method for a handheld multi-purpose saw according to claim 3, characterized in that, The third strategy includes: When the total vertical feed distance of the saw body (1) is less than the total distance of the workpiece, an over-distance alarm is triggered and the saw body (1) is moved toward the workpiece. Then, S5 is repeated. When the total vertical feed distance of the saw body (1) is greater than the total distance of the workpiece, the machine stops.

9. A multi-purpose saw, wherein the multi-purpose saw is adaptively controlled using the adaptive control method for a handheld multi-purpose saw as described in claim 1, comprising a saw body (1) and a saw blade (4), characterized in that, Also includes: The drive unit (2) is fixedly installed inside the saw body (1) at its input end; The adjustment part (3) has its fixed end fixedly connected to the output end of the drive part (2), and its output end is fixedly installed at one end of the saw blade (4). The saw blade (4) cuts the workpiece below. The drive part (2) drives the adjustment part (3) and the saw blade (4) to perform high-frequency reciprocating linear motion and reciprocate cutting of the workpiece. The adjustment part (3) controls the extension length of the drive saw blade (4).

10. A multi-purpose saw according to claim 9, characterized in that, The end of the saw body (1) is fixedly connected to a telescopic component (5), and the telescopic end of the telescopic component (5) is fixedly connected to a guide frame (6). The guide frame (6) is located on the top side of the saw blade (4) and provides guidance and support for the reciprocating linear movement of the saw blade (4). The output end of the drive unit (2) is equipped with a resistance sensor. The inner bottom of the guide frame (6) is equipped with a pressure sensor and a temperature sensor. The bottom of the guide frame (6) is equipped with a vertical feed distance sensor.

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