Multi-functional Saw Blade Testing Machine and Its Testing Method

Abstract

This application relates to the technical field of saw blade production equipment, and particularly relates to a multi-functional saw blade testing machine and its testing method. The multi-functional saw blade testing machine includes a processing table, a guide rail crossbeam installed on the processing table, a machine head slidably installed on the guide rail crossbeam in the horizontal direction, a sliding drive device for driving the machine head to slide, and a pulley gantry installed with a pulling rope; the machine head includes a mounting plate slidably installed on the guide rail crossbeam, a cutting motor slidably installed on the mounting plate in the vertical direction, a lifting device for driving the cutting motor to slide, and a distance sensor for detecting the swinging condition of the saw blade. A dynamic torque sensor is installed on the cutting motor; a pressing component for pressing the cutting workpiece is provided on the processing table; one end of the pulling rope is connected to the machine head, and the other end is connected with a constant force applying component after passing around the pulley on the pulley gantry; the drive source of the sliding drive device is a servo motor. The integration of functions such as sharpness, cutting life, and runout testing is realized.

Description

Technical Field

[0001] The present application relates to the technical field of saw blade production equipment, and particularly relates to a multifunctional saw blade testing machine and a testing method thereof. Background Art

[0002] After the saw blade is produced, it needs to be tested, including the tests of sharpness, cutting life and runout. Among them, during the test process, it is mainly driven in two ways: constant speed and constant force. When measuring sharpness and cutting life, the constant force method is adopted, that is, the saw blade is pushed or pulled to move by a fixed force, and when measuring sharpness, the time required to cut a material of a fixed length is detected.

[0003] When measuring the cutting life, the cutting time or the current of the main shaft is measured. When the cutting time of the material reaches a certain value or the current increases to a certain degree, it means that the service life is reached.

[0004] When measuring the runout, a constant cutting speed is given and the test is carried out at different feed speeds to measure the swing of the saw blade.

[0005] At present, since constant speed and constant force require two different drives, the tests of sharpness, cutting life and runout need to be carried out on multiple devices, which is rather cumbersome and occupies a large floor area. Summary of the Invention

[0006] In order to realize the integration of the functions of sharpness, cutting life and runout tests, the present application provides a multifunctional saw blade testing machine and a testing method thereof.

[0007] On the one hand, a multifunctional saw blade testing machine provided by the present application adopts the following technical solutions:

[0008] A multifunctional saw blade testing machine includes a processing table, a guide rail cross beam installed on the processing table, a machine head slidably installed on the guide rail cross beam in the horizontal direction, a sliding drive device for driving the sliding of the machine head, and a pulley gantry installed with a pulling rope;

[0009] The machine head includes a mounting plate slidably installed on the guide rail cross beam, a cutting motor slidably installed on the mounting plate in the vertical direction, a lifting device for driving the sliding of the cutting motor, and a distance sensor for detecting the swing of the saw blade. A dynamic torque sensor is installed on the cutting motor;

[0010] A pressing component for pressing the cutting workpiece is arranged on the processing table;

[0011] One end of the pulling rope is connected to the machine head, and the other end is connected with a constant force applying component through a pulley on the pulley gantry;

[0012] The driving source of the sliding driving device is a servo motor.

[0013] By adopting the above technical solution, the saw blade to be detected is installed on the cutting motor, and then the cutting workpiece is placed on the processing table. After adjusting the position, it is fixed by pressing with the pressing component. When performing the constant speed test, start the servo motor to drive the machine head to move at a constant speed until the cutting of the cutting workpiece is completed. When the constant force detection is required, adjust the constant pulling force of the constant force applying component, turn off the servo motor, and pull the machine head to move through the constant force applying component until the cutting of the cutting workpiece is completed.

[0014] Optionally: The sliding driving device further includes a rack installed on the guide rail cross beam and a driving gear connected to the output shaft of the servo motor. The servo motor is installed on the machine head, and the driving gear meshes with the rack.

[0015] By adopting the above technical solution, the structure realizes the horizontal movement of the machine head driven by the servo motor, and the structure is simple.

[0016] Optionally: The machine head further includes a dust-proof protection cover for covering the saw blade, and an air suction pipe is connected to the dust-proof protection cover.

[0017] By adopting the above technical solution, the debris generated during the cutting process is sucked away through the air suction pipe, optimizing the workshop environment.

[0018] Optionally: The guide rail cross beam is slidably installed on the processing table in the horizontal direction. The sliding direction of the guide rail cross beam is perpendicular to the sliding direction of the machine head, and a displacement driving device for driving the sliding of the guide rail cross beam is provided on the processing table.

[0019] By adopting the above technical solution, the position of the machine head can be adjusted to achieve more accurate positioning and cutting.

[0020] Optionally: The constant force applying component includes a preparation tray connected to the stretching and a counterweight block that can be placed on the tray.

[0021] By adopting the above technical solution, using the counterweight as the constant force applying component, the structure is simple and the adjustment is convenient.

[0022] On the other hand, a test method for a multifunctional saw blade testing machine provided by the present application adopts the following technical solution:

[0023] A test method based on the above-mentioned multifunctional saw blade testing machine includes the following steps:

[0024] Receive a start signal, where the start signal includes a constant speed start signal and a constant force start signal;

[0025] When the start signal is a constant speed start signal:

[0026] Start the cutting motor and detect the swing data of the cutting motor through the distance sensor;

[0027] After the cutting motor reaches the operating speed, start the servo motor, where the operating speed is the cutting speed set for this saw blade detection;

[0028] When the machine head runs to the stroke position, stop the servo motor and the cutting motor;

[0029] When the start signal is a constant force start signal:

[0030] Start the cutting motor. After the cutting motor reaches the operating speed, start the servo motor;

[0031] After the servo motor is started, when the detection data of the dynamic torque sensor is greater than the preset torque value, disconnect the servo motor and start timing; where the preset torque value is greater than the torque when the cutting motor runs idle and less than the torque during cutting;

[0032] When the detection data of the dynamic torque sensor is greater than the preset torque value, stop timing and output the time data;

[0033] When the machine head runs to the stroke position, stop the servo motor and the cutting motor.

[0034] By adopting the above technical solution, based on the type of start signal received, two different tests of constant speed and constant force are automatically started. When performing the constant speed test, only the torque data needs to be measured. When a constant force test is required, first control the machine head to move through the servo motor. When the saw blade starts to cut the workpiece, the torque will increase instantaneously. At this time, stop the servo motor and pull with a constant force, and start timing at the same time. After the cutting is completed, the torque will decrease instantaneously. At this time, the time when the timing stops is the actual cutting time.

[0035] Optionally: After starting timing, judge whether the detection data of the dynamic torque sensor is less than the preset torque value within N seconds. If so, stop and clear the timing, and at the same time restart the servo motor;

[0036] When the detection data of the dynamic torque sensor is greater than the preset torque value again, disconnect the servo motor and restart timing.

[0037] By adopting the above technical solution, it is possible to avoid false starts caused by increased torque due to other reasons before cutting starts, and improve the detection accuracy.

[0038] Optionally: If the detected data of the dynamic torque sensor is less than the preset torque value within N seconds after starting the timing, it is judged whether the detected data of the dynamic torque sensor is greater than the preset torque value again within M seconds. If so, the timing continues; if not, the timing is stopped and cleared, and the servo motor is restarted simultaneously; where M is less than N.

[0039] By adopting the above technical solution, it is avoided that at the initial stage of cutting, due to reasons such as the pulling force not fully acting on the machine head, the detected torque decreases, resulting in recalculation and affecting the accuracy. Further interference is eliminated and the accuracy is improved.

[0040] Optionally: When the detected data of the dynamic torque sensor is less than the preset torque value after starting the timing for L seconds, record the time data S1 and continue the timing;

[0041] At the same time, it is judged whether the detected data of the dynamic torque sensor is greater than the preset torque value again within H seconds. If so, the timing continues and the detection data judgment is repeated, and the recorded time data are S2... SN in sequence; until the judgment that the detected data of the dynamic torque sensor is greater than the preset torque value again within H seconds is negative, the timing is stopped and the time data SN is output.

[0042] By adopting the above technical solution, before outputting the time data, further verification is carried out to avoid the situation of stopping the timing before the cutting is completed.

[0043] Optionally: After starting the timing, when the detected data of the dynamic torque sensor is greater than the preset maximum torque value, stop the timing and output the time data Sm, where the preset maximum torque value is N times the maximum value among the torque values detected during the first cutting of the saw blade.

[0044] By adopting the above technical solution, when the detected database is greater than the maximum torque value, it means that the saw blade has reached the service life. After recording this time, the cutting times of each cut workpiece cut previously are summarized to obtain the service life of the saw blade. Description of the Drawings

[0045] Figure 1 is the structural schematic of this embodiment Figure 1 , showing the front structure;

[0046] Figure 2 is the structural schematic of this embodiment Figure 2 , showing the side structure;

[0047] Figure 3 is the front view of the machine head in this embodiment;

[0048] Figure 4 is the structural schematic diagram of the machine head in this embodiment;

[0049] Figure 5 It is a flowchart of a test method.

[0050] In the figure, 100 is a processing table; 110 is a pressing assembly; 111 is a pressing roller; 112 is a telescopic element; 200 is a guide rail crossbeam; 210 is a crossbeam; 211 is a travel switch S; 220 is a connecting arm; 230 is a sliding guide rail; 300 is a machine head; 310 is a mounting plate; 320 is a cutting motor; 330 is a lifting device; 340 is a distance sensor; 350 is a dust protection cover; 351 is an air suction pipe; 400 is a sliding drive device; 410 is a servo motor; 420 is a rack; 430 is a driving gear; 500 is a pulley gantry; 510 is a roller; 520 is a constant force application assembly; 521 is a tray; 522 is a counterweight. Detailed implementation manners

[0051] The following further describes the present application in detail with reference to the accompanying drawings.

[0052] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0053] A multifunctional saw blade testing machine, as Figure 1 and Figure 2 shown, includes a processing table 100, a guide rail crossbeam 200, a machine head 300, a sliding drive device 400 and a pulley gantry 500.

[0054] As Figure 1 shown, a pressing assembly 110 is installed on the processing table 100. The pressing assembly 110 at least includes a pressing roller 111 and telescopic elements 112 installed on both sides of the processing table 100. The telescopic elements 112 are cylinders or hydraulic cylinders, and both ends of the pressing roller 111 are respectively installed on the piston rods of the two telescopic elements 112.

[0055] As Figure 1 and Figure 2As shown in the figure, the guide rail crossbeam 200 includes two vertical connecting arms 220 and a crossbeam 210 connected to the tops of the two connecting arms 220. The crossbeam 210 is arranged in parallel with the pressing roller 111, and a sliding guide rail 230 is fixedly installed on the crossbeam 210. The lower ends of the two connecting arms 220 are installed on the processing table 100, so that the guide rail crossbeam 200 can slide along the horizontal direction of the processing table 100, and the sliding direction of the guide rail crossbeam 200 is perpendicular to the sliding guide rail 230. A displacement driving device for driving the sliding of the guide rail crossbeam 200 is provided on the processing table 100. In this embodiment, the displacement driving device is a lead screw mechanism.

[0056] As Figure 1 and Figure 3 shown in the figure, the machine head 300 includes a mounting plate 310, a cutting motor 320, a lifting device 330, a dust protection cover 350 and a distance sensor 340. The mounting plate 310 is slidably mounted on the sliding guide rail 230, the cutting motor 320 is slidably mounted on the mounting plate 310 in the vertical direction, and the lifting device 330 is mounted on the mounting plate 310. In this embodiment, the lifting device 330 is also a lead screw mechanism.

[0057] The dust protection cover 350 is fixedly installed on the cutting motor 320. The saw blade is installed on the rotating shaft of the cutting motor 320 and is located in the dust protection cover 350. An air suction pipe 351 is connected to the dust protection cover 350.

[0058] The distance sensor 340 is installed inside the dust protection cover 350. The detection position of the distance sensor 340 is at a position 13 mm to 18 mm from the axis of the cutting motor 320. This dimension is smaller than the diameter of the saw blade to be detected. The detection accuracy of the distance sensor 340 is 2 μm.

[0059] Among them, a dynamic torque sensor is installed on the cutting motor 320. It should be clear here that in addition to through the torque sensor, the current of the cutting motor 320 can also be detected, and the corresponding test can be completed through the detected circuit data.

[0060] As Figure 4 shown in the figure, the sliding driving device 400 includes a servo motor 410, a rack 420 and a driving gear 430. The rack 420 is fixedly installed on the top of the crossbeam 210. The servo motor 410 is installed on the mounting plate 310. The driving gear 430 is connected to the rotating shaft of the servo motor 410, and the driving gear 430 meshes with the rack 420.

[0061] In addition, a travel switch is also installed on the crossbeam 210 to control the running stroke of the machine head 300.

[0062] As Figure 1 and Figure 2As shown in the figure, the pulley gantry 500 is fixedly installed on the crossbar. A plurality of rollers 510 are installed on the pulley gantry 500. A pulling rope is connected to the mounting plate 310. The other end of the pulling rope sequentially bypasses the plurality of rollers 510 on the pulley gantry 500 and is connected to a constant force applying assembly 520.

[0063] The constant force applying assembly 520 includes a tray 521 and a counterweight 522. The tray 521 is fixedly connected to the pulling rope. The counterweight 522 can be stably placed on the tray 521. In this embodiment, the counterweight 522 is selected as a weight.

[0064] Based on the above test method of the multifunctional saw blade testing machine, it includes the following steps:

[0065] Receive the start signal and judge the type of the start signal. The start signal includes a constant speed start signal and a constant force start signal.

[0066] When the start signal is a constant speed start signal:

[0067] Start the cutting motor 320, and at the same time detect the swing data of the cutting motor 320 through the distance sensor 340 and output it;

[0068] After the cutting motor 320 reaches the operating speed, start the servo motor 410. Among them, the operating speed is the cutting speed set for this saw blade detection. Generally, the speed setting range is required to be 1500 r / min to 5000 r / min;

[0069] When the head 300 runs to the stroke position, stop the servo motor 410 and the cutting motor 320.

[0070] When the start signal is a constant force start signal:

[0071] Start the cutting motor 320. After the cutting motor 320 reaches the operating speed, start the servo motor 410;

[0072] After the servo motor 410 is started, when the detection data of the dynamic torque sensor is greater than the preset torque value, disconnect the servo motor 410 and start timing; among them, the preset torque value is greater than the torque when the cutting motor 320 idles and less than the torque during cutting;

[0073] After starting the timing, judge whether the detection data of the dynamic torque sensor is less than the preset torque value within N seconds. If so, then judge whether the detection data of the dynamic torque sensor is greater than the preset torque value again within M seconds. If so, continue timing; if not, stop and clear the timing, and at the same time restart the servo motor 410. When it is detected again that the detection data of the dynamic torque sensor is greater than the preset torque value, disconnect the servo motor 410 and restart the timing; among them, M is less than N, 0.5 < N < 2, and M < 1.

[0074] After starting the timing and calculating for L seconds, when the detected data of the dynamic torque sensor is less than the preset torque value, record the time data S1 and continue the timing; at the same time, determine whether the detected data of the dynamic torque sensor is greater than the preset torque value again within H seconds. If so, continue the timing and repeat the determination of the detected data. Each time the detected data is less than the preset torque value, record the time data once, and the recorded time data are S2... SN in sequence; until the determination that the detected data of the dynamic torque sensor is greater than the preset torque value again within H seconds is negative, stop the timing and output the last recorded time data SN. Wherein, L≥N + M and H<1.

[0075] After starting the timing, when the detected data of the dynamic torque sensor 340 is greater than the preset maximum torque value, stop the timing and output the time data Sm, where the preset maximum torque value is N times the maximum value among the torque values detected during the first cutting of the saw blade, and usually 2 times is used as a reference.

[0076] When the standby head 300 runs to the stroke position, stop the servo motor 410 and the cutting motor 320.

[0077] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A multifunctional saw blade testing machine, characterized in that: it includes a processing table (100), a guide rail cross beam (200) installed on the processing table (100), a machine head (300) slidably installed on the guide rail cross beam (200) in the horizontal direction, a sliding drive device (400) for driving the sliding of the machine head (300), and a pulley gantry (500) equipped with a pulling rope; the machine head (300) includes a mounting plate (310) slidably installed on the guide rail cross beam (200), a cutting motor (320) slidably installed on the mounting plate (310) in the vertical direction, a lifting device (330) for driving the sliding of the cutting motor (320), and a distance sensor (340) for detecting the swinging condition of the saw blade. A dynamic torque sensor is installed on the cutting motor (320); a pressing assembly (110) for pressing the workpiece is provided on the processing table (100); one end of the pulling rope is connected to the machine head (300), and the other end passes around the pulley on the pulley gantry (500) and is connected to a constant force applying assembly (520); the drive source of the sliding drive device (400) is a servo motor (410).

2. The multifunctional saw blade testing machine according to claim 1, characterized in that: the sliding drive device (400) further includes a rack (420) installed on the guide rail cross beam (200) and a drive gear (430) connected to the output shaft of the servo motor (410). The servo motor (410) is installed on the machine head (300), and the drive gear (430) meshes with the rack (420).

3. The multifunctional saw blade testing machine according to claim 1, characterized in that: the machine head (300) further includes a dust-proof protective cover (350) for covering the saw blade, and an air suction pipe (351) is connected to the dust-proof protective cover (350).

4. The multifunctional saw blade testing machine according to claim 1, characterized in that: the guide rail cross beam (200) is slidably installed on the processing table (100) in the horizontal direction. The sliding direction of the guide rail cross beam (200) is perpendicular to the sliding direction of the machine head (300). A displacement drive device for driving the sliding of the guide rail cross beam (200) is provided on the processing table (100).

5. The multifunctional saw blade testing machine according to claim 1, characterized in that: the constant force applying assembly (520) includes a preparation tray (521) connected to the pulling rope and a counterweight (522) that can be placed on the tray (521).

6. A testing method for the multifunctional saw blade testing machine according to any one of claims 1-5, characterized in that, it includes the following steps: receiving a start signal, the start signal including a constant speed start signal and a constant force start signal; when the start signal is a constant speed start signal: starting the cutting motor (320) and detecting the swinging data of the cutting motor (320) through the distance sensor (340); After the cutting motor (320) reaches the operating speed, start the servo motor (410), where the operating speed is the cutting speed set for this saw blade detection; When the machine head (300) runs to the stroke position, stop the servo motor (410) and the cutting motor (320); When the start signal is a constant force start signal: Start the cutting motor (320), and after the cutting motor (320) reaches the operating speed, start the servo motor (410); After the servo motor (410) is started, when the detection data of the dynamic torque sensor is greater than the preset torque value, disconnect the servo motor (410) and start timing; where the preset torque value is greater than the torque when the cutting motor (320) runs idle and less than the torque during cutting; When the detection data of the dynamic torque sensor is less than the preset torque value, stop timing and output the time data; When the machine head (300) runs to the stroke position, stop the servo motor (410) and the cutting motor (320).

7. The multi-functional saw blade testing machine according to claim 6, characterized in that: After starting timing, judge whether the detection data of the dynamic torque sensor is less than the preset torque value within N seconds. If so, stop and clear the timing, and at the same time restart the servo motor (410); When the detection data of the dynamic torque sensor is greater than the preset torque value again, disconnect the servo motor (410) and restart timing.

8. The multi-functional saw blade testing machine according to claim 7, characterized in that: If the detection data of the dynamic torque sensor is less than the preset torque value within N seconds after starting timing, judge whether the detection data of the dynamic torque sensor is greater than the preset torque value again within M seconds. If so, continue timing; if not, stop and clear the timing, and at the same time restart the servo motor (410); where M is less than N.

9. The multi-functional saw blade testing machine according to claim 8, characterized in that: When the detection data of the dynamic torque sensor is greater than the preset torque value after starting timing for L seconds, record the time data S1 and continue timing, where L≥N+M; At the same time, judge whether the detection data of the dynamic torque sensor is greater than the preset torque value again within H seconds. If so, continue timing and repeat the detection data judgment, and record the time data as S2... SN in sequence; until the judgment that the detection data of the dynamic torque sensor is greater than the preset torque value again within H seconds is negative, stop timing and output the time data SN.

10. The multi-functional saw blade testing machine according to claim 9, characterized in that: After starting timing, when the detection data of the dynamic torque sensor is greater than the preset maximum torque value, stop timing and output the time data Sm, where the preset maximum torque value is N times the maximum value among the torque values detected during the first cutting of the saw blade.

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