An ultrasonic straight blade sharpness detection device and a detection method thereof

Abstract

The application discloses an ultrasonic straight blade sharpness detection device and a detection method thereof. The ultrasonic straight blade sharpness detection device comprises a machine table, a tool clamping tool, a wire clamping device, a force measuring device and a control terminal. The tool clamping tool is arranged on the machine table and is provided with an ultrasonic loading unit for clamping the ultrasonic straight blade to be detected and making the ultrasonic straight blade to be detected vibrate under the action of ultrasonic waves. The wire clamping device is installed on the machine table and below the blade of the ultrasonic straight blade to be detected for fixing the test wire. The force measuring device is arranged at the bottom of the wire clamping device and is used for detecting the cutting force of the cut test wire. The control terminal is signal connected with the force measuring device and is used for determining the sharpness of the ultrasonic straight blade to be detected according to the cutting force. The application provides an ultrasonic straight blade sharpness detection device, realizes the measurement of the sharpness of the cutting blade of the ultrasonic straight blade, improves the accuracy of the test result, and more truly reflects the sharpness of the ultrasonic straight blade.

Description

Technical Field

[0001] The present invention relates to the field of intelligent manufacturing and precision machining technology, and in particular to an ultrasonic straight-edge knife sharpness detection device and a detection method thereof. Background Art

[0002] Honeycomb composites are widely used in industries such as aerospace. While these materials offer significant advantages, including excellent mechanical and electromagnetic properties, they require very high processing requirements. Currently, ultrasonic machining, which involves high-frequency vibration and high-speed cutting, is the primary method used for processing honeycomb materials. During high-speed cutting, the tool can experience ultrasonic scraping or pick-up. As tool sharpness decreases, cutting performance significantly weakens, and processing quality deteriorates. To achieve high-quality, stable dimensional accuracy, the cutting edge of an ultrasonic straight-edge knife must be sufficiently sharp. Therefore, sharpness testing of ultrasonic straight-edge knives is crucial.

[0003] At present, in the tool cutting system, during the cutting process, the ultrasonic straight-edge knife vibrates under ultrasonic high frequency, but the force measuring system of the existing ultrasonic straight-edge knife sharpness detection device generally performs the sharpness test of the ultrasonic straight-edge knife without loading ultrasound, resulting in inaccurate measured force and unable to truly reflect the sharpness of the ultrasonic straight-edge knife under ultrasonic high-frequency vibration. Summary of the Invention

[0004] The main purpose of the present invention is to provide an ultrasonic straight-edge knife sharpness detection device and a detection method thereof, aiming to improve the accuracy of the sharpness test of the ultrasonic straight-edge knife so as to more realistically reflect the ultrasonic cutting sharpness of the ultrasonic straight-edge knife.

[0005] To achieve the above object, the present invention provides an ultrasonic straight-edge knife sharpness detection device, comprising:

[0006] Machine;

[0007] A tool clamping tool is provided on the machine platform, wherein the tool clamping tool is provided with an ultrasonic loading unit for clamping the ultrasonic straight-edge knife to be tested and causing the ultrasonic straight-edge knife to be tested to vibrate under the action of ultrasound;

[0008] A wire clamping device is installed on the machine platform and is located below the blade of the ultrasonic straight-edge knife to be tested, so as to fix the test wire;

[0009] a force measuring device, disposed at the bottom of the wire clamping device and used to detect the cutting force exerted on the cut test wire; and

[0010] A control terminal is connected to the force measuring device signal and is used to determine the ultrasonic cutting sharpness of the ultrasonic straight-edge knife to be tested according to the cutting force.

[0011] Optionally, the ultrasonic straight blade sharpness detection device further comprises a first movement mechanism arranged on the machine table, the force measuring device is arranged on the first movement mechanism, and the wire clamping device is arranged on the force measuring device, and the first movement mechanism is used to drive the force measuring device and the wire clamping device arranged thereon to move in a first direction and a second direction, wherein the first direction is perpendicular to the second direction.

[0012] Optionally, the first movement mechanism comprises a first lead screw and a second lead screw, and a sliding block is arranged on each of the first lead screw and the second lead screw, and the force measuring device is fixed on the sliding block.

[0013] Optionally, the ultrasonic straight blade sharpness detection device further comprises a second movement mechanism arranged on the machine table through a mounting plate, and the tool clamping tool is arranged on the second movement mechanism, and the second movement mechanism is used to drive the tool clamping tool to move in a third direction, and the third direction is perpendicular to the first direction and the second direction respectively.

[0014] Optionally, a tool handle for fixing the ultrasonic straight blade to be detected is arranged on the tool clamping tool, the tool handle is provided with the ultrasonic loading unit, the ultrasonic loading unit comprises a transmission coil, and the ultrasonic straight blade sharpness detection device further comprises a power supply device arranged on the machine table, and the power supply device loads an ultrasonic signal to the ultrasonic straight blade to be detected through the transmission coil.

[0015] Optionally, the ultrasonic straight blade sharpness detection device further comprises a laser tool setting mechanism fixed to and located on the machine table, and used for calibrating the blade direction of the ultrasonic straight blade to be detected; and / or

[0016] The wire clamping device comprises a wire fixing seat formed with an opening, and a fixed end assembly and a non-fixed end assembly arranged on the wire fixing seat, the fixed end assembly and the non-fixed end assembly are located on two sides of the opening respectively, the fixed end assembly is used to compress one end of the test wire, and the non-fixed end assembly is used to wind the other end of the test wire.

[0017] To achieve the above-mentioned purpose, the application further provides an ultrasonic straight blade sharpness detection method based on the ultrasonic straight blade sharpness detection device, and the method comprises the following steps:

[0018] The tool clamping tool is controlled to move to a target position and is aligned with the ultrasonic straight blade to be detected;

[0019] The wire clamping device is moved to a cutting position;

[0020] Loading an ultrasonic signal to the ultrasonic straight-edged knife to be tested, driving the ultrasonic straight-edged knife to be tested to cut the test wire on the wire clamping device until the test wire is cut off;

[0021] Collect the force during the cutting process to form a cutting force-time curve;

[0022] The ultrasonic cutting sharpness is calculated based on the cutting force-time curve.

[0023] Optionally, the step of calculating the ultrasonic cutting sharpness according to the cutting force-time curve specifically includes:

[0024] Based on the cutting force-time curve during the cutting process, the cutting process is divided into the vertical cutting process along the Z axis and the horizontal vibration cutting process along the X axis, and the work done W1 and W2 are calculated respectively;

[0025] According to the cutting length and the properties of the material itself, the first characterization parameter of the ultrasonic cutting sharpness of the ultrasonic straight blade is calculated. The calculation formula is:

[0026]

[0027]

[0028] f I =I1*I2

[0029] Wherein, I1 is the static cutting parameter based on static cutting to characterize sharpness, and I2 is the ultrasonic cutting parameter based on ultrasonic vibration to characterize sharpness; f I is the first characterizing parameter of the sharpness of the ultrasonic straight-edge knife; G is the fracture toughness of the cut material, γ is the ultrasonic vibration frequency, t is the time of the cutting process, D is the diameter of the cut material, and H is the Shore hardness of the cut material;

[0030] Based on the change of the small wedge angle edge radius of the ultrasonic straight-edge knife before and after cutting, the second characterization parameter of the ultrasonic cutting sharpness of the ultrasonic straight-edge knife is calculated, and the calculation formula is:

[0031] f II =R2-R1

[0032] Among them, f II is the second characterization parameter of sharpness, R1 is the edge radius before cutting, and R2 is the edge radius after cutting;

[0033] Calculate the ultrasonic cutting sharpness, the calculation formula is:

[0034] f=f I *f II

[0035] Wherein, f is the ultrasonic cutting sharpness of the ultrasonic straight-edge knife.

[0036] Optionally, the specific calculation formulas of W1 and W2 are:

[0037]

[0038] Among them, F Z is the force along the Z axis obtained by the force measuring device, v Z The speed of the ultrasonic straight-edge knife cutting the test line along the Z axis is set;

[0039]

[0040] Among them, F X is the force along the X-axis obtained by the force measuring device, and Ap is the ultrasonic amplitude.

[0041] Optionally, before the step of controlling the tool holding fixture to move to the target position and aligning the ultrasonic straight-edge knife to be tested, the method further includes the following steps:

[0042] Measure the blade radius of the ultrasonic straight blade to be tested before cutting and record it as R1;

[0043] After the step of loading the ultrasonic signal onto the ultrasonic straight-edged knife to be tested and driving the ultrasonic straight-edged knife to be tested to cut the test line on the wire clamping device until the test line is cut, the method further includes the following steps:

[0044] The blade radius of the ultrasonic straight-edge knife to be tested after cutting is measured and recorded as R2.

[0045] In the technical solution of the present invention, the ultrasonic straight-edge knife sharpness testing equipment includes a machine, a tool clamping fixture, a wire clamping device, a force measuring device, and a control terminal; the tool clamping fixture is installed on the machine, and the tool clamping fixture is equipped with an ultrasonic loading unit for clamping the ultrasonic straight-edge knife to be tested and causing the ultrasonic straight-edge knife to vibrate under the action of ultrasound; the wire clamping device is installed on the machine and is located below the blade side of the ultrasonic straight-edge knife to be tested, for fixing the test wire; the force measuring device is located at the bottom of the wire clamping device and is used to detect the cutting force applied to the cut test wire; the control terminal is signal-connected to the force measuring device and is used to determine the ultrasonic cutting sharpness of the ultrasonic straight-edge knife to be tested based on the cutting force. It can be understood that the present invention improves the accuracy of force measurement during the ultrasonic cutting process by loading an ultrasonic signal on the ultrasonic straight-edge knife to be tested and measuring the ultrasonic vibration force, thereby improving the accuracy of the ultrasonic cutting sharpness test of the ultrasonic straight-edge knife, thereby more realistically reflecting the ultrasonic cutting sharpness of the ultrasonic straight-edge knife. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in the drawings without creative labor.

[0047] Figure 1 It is a front view of an embodiment of the ultrasonic straight blade sharpness detection device of the present application.

[0048] Figure 2 It is a structural schematic view of an embodiment of the ultrasonic straight blade sharpness detection device of the present application.

[0049] Figure 3 It is a structural schematic view of a tool clamping tool in an embodiment of the ultrasonic straight blade sharpness detection device of the present application.

[0050] Figure 4 It is a structural schematic view of a wire clamping device in an embodiment of the ultrasonic straight blade sharpness detection device of the present application.

[0051] Figure 5 It is a flow schematic view of an embodiment of the ultrasonic straight blade sharpness detection method of the present application.

[0052] Figure 6 It is a Z-axis direction cutting force-time curve graph of an embodiment of the ultrasonic straight blade sharpness detection method of the present application.

[0053] Figure 7 It is an X-axis direction cutting force-time curve graph of an embodiment of the ultrasonic straight blade sharpness detection method of the present application.

[0054] Explanation of the reference signs:

[0055] 10, machine table; 20, tool clamping tool; 30, wire clamping device; 40, force measuring device; 101, ultrasonic straight blade; 102, test wire; 50, first motion mechanism; 60, second motion mechanism; 70, laser tool setting mechanism; 11, mounting plate; 1011, tool shank; 31, wire fixing seat; 32, fixed end assembly; 33, non-fixed end assembly; 51, first lead screw; 52, second lead screw.

[0056] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION

[0057] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0058] It should be noted that all the direction indications (such as up, down, left, right, front, back) in the embodiments of the present application are only used to explain the relative position relationship, motion condition and the like between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the direction indications also change accordingly.

[0059] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B schemes. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of a person of ordinary skill in the art, and when the combination of technical solutions appears to be contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection claimed by the present application.

[0060] The present application provides an ultrasonic straight blade sharpness detection device.

[0061] With reference to Figures 1 to 4 In an embodiment of the present application, the ultrasonic straight blade sharpness detection device comprises a machine table 10, a tool clamping tool 20, a wire clamping device 30, a force measuring device 40 and a control terminal. The tool clamping tool 20 is arranged on the machine table 10, and the tool clamping tool 20 is provided with an ultrasonic loading unit for clamping the ultrasonic straight blade 101 to be tested and making the ultrasonic straight blade 101 to be tested vibrate under the action of ultrasonic waves. The wire clamping device 30 is installed on the machine table 10 and is adapted to be located below the blade of the ultrasonic straight blade 101 to be tested, so as to fix the test wire 102. The force measuring device 40 is arranged at the bottom of the wire clamping device 30 and is used to detect the cutting force of the cut test wire 102. The control terminal is in signal connection with the force measuring device 40 and is used to determine the ultrasonic cutting sharpness of the ultrasonic straight blade 101 to be tested according to the cutting force. The control terminal can be a computer or the like.

[0062] In the embodiment, the material of the test wire 102 can be selected as a high-strength polyethylene fiber line, and the diameter thereof can be between 0.2-0.5mm, which is not limited here.

[0063] It can be understood that the present invention loads an ultrasonic signal on the ultrasonic straight-edge knife 101 to be tested and measures the ultrasonic vibration force, thereby improving the accuracy of force measurement during the ultrasonic cutting process, thereby improving the accuracy of the ultrasonic cutting sharpness test of the ultrasonic straight-edge knife 101, so as to more realistically reflect the ultrasonic cutting sharpness of the ultrasonic straight-edge knife 101.

[0064] In order to improve the test efficiency and further improve the accuracy of testing the sharpness of the ultrasonic straight blade 101, refer to Figures 1 to 4 In one embodiment, the ultrasonic straight-edge knife sharpness testing device may further include a first motion mechanism 50. The first motion mechanism 50 is disposed on the machine platform 10. The force measuring device 40 is disposed on the first motion mechanism 50. The wire clamping device 30 is disposed on the force measuring device 40. The first motion mechanism 50 is configured to drive the force measuring device 40 and the wire clamping device 30 thereon to move in a first direction and a second direction, wherein the first direction is perpendicular to the second direction. The first direction may be the X-axis direction of the machine platform 10, and the second direction may be the Y-axis direction of the machine platform 10.

[0065] In this embodiment, the first motion mechanism 50 may include a first screw rod 51 and a second screw rod 52 . The first screw rod 51 and the second screw rod 52 are both provided with a slider, and the force measuring device 40 is fixed on the slider.

[0066] The movement range of the slider can be set to within 100 mm, and the accuracy can be higher than 0.02 mm, which is not limited here.

[0067] The first motion mechanism 50 can automatically control the screw drive through a stepping motor or other driving element to achieve the movement of the force measuring device 40 and the clamping device 30 thereon. Of course, the position of the force measuring device 40 and the clamping device 30 thereon can also be adjusted manually by manually rotating a handwheel to adjust the position of the screw drive slider, which is not limited here.

[0068] To further improve test efficiency, refer to Figures 1 to 4 In one embodiment, the ultrasonic straight-edge knife sharpness testing apparatus may further include a second motion mechanism 60 . The second motion mechanism 60 is mounted on the machine platform 10 via the mounting plate 11 . The tool holding fixture 20 is mounted on the second motion mechanism 60 . The second motion mechanism 60 is configured to drive the tool holding fixture 20 to move along a third direction perpendicular to both the first and second directions. Specifically, the third direction may be the Z-axis direction of the machine platform 10 .

[0069] In this embodiment, the ultrasonic straight-edge knife sharpness detection device may further include a laser knife setting mechanism 70 . The laser knife setting mechanism 70 is fixed on the machine platform 10 to calibrate the blade direction of the ultrasonic straight-edge knife 101 to be tested.

[0070] In this embodiment, the tool holding fixture 20 is mounted on a second motion mechanism 60, which can drive the ultrasonic straight-edge knife 101 to move up and down at a constant speed. Specifically, the second motion mechanism 60 may include a slide rail and a slider slidably mounted on the slide rail. The slider can move up and down along the slide rail at a constant speed. The second motion mechanism 60 drives the tool holding fixture 20 to a predetermined position directly in front of the laser tool setting mechanism 70.

[0071] The movement range of the slider of the second movement mechanism 60 can be set to be within 250 mm, the accuracy can be higher than 0.02 mm, and the movement speed can be less than 10 mm / min, which is not limited here.

[0072] To ensure that the ultrasonic straight blade 101 can smoothly cut the test line 102 and further improve the accuracy of the test, the laser tool setting mechanism 70 can be fixedly installed on the machine 10 on the center line of the first motion mechanism 50, and its laser is emitted in the horizontal direction.

[0073] The tool holder 20 is provided with a shank 1011 for securing the ultrasonic straight-edge knife 101 to be tested. The ultrasonic straight-edge knife 101 can be mounted on the shank 1011 via a threaded connection. It should be noted that before being tightened with the screws, the shank 1011 can rotate freely within the tool holder 20, and the direction of the blade of the ultrasonic straight-edge knife 101 is calibrated using the laser tool setting mechanism 70.

[0074] During tool calibration, the ultrasonic straight blade knife 101 is connected to the blade handle 1011 through a thread, and the tool is calibrated by rotating the blade handle 1011. When the laser can cover both sides of the blade of the ultrasonic straight blade knife 101, it indicates that the ultrasonic straight blade knife 101 is in a vertical state. At this time, the tangent line of the cutting edge of the ultrasonic straight blade knife 101 is perpendicular to the test line 102, which can ensure orthogonal cutting and make the test results more accurate.

[0075] Based on the above embodiments, mainly referring to Figure 3 The blade handle 1011 can be equipped with the aforementioned ultrasonic loading unit, which includes a transmission coil. The ultrasonic straight-edge knife sharpness testing device also includes a power supply device mounted on the machine 10. The power supply device transmits an ultrasonic signal to the ultrasonic straight-edge knife 101 to be tested via the transmission coil. In this way, an ultrasonic signal of a predetermined voltage and frequency is applied to the ultrasonic straight-edge knife 101, causing the ultrasonic straight-edge knife 101 to vibrate.

[0076] Compared with the existing ultrasonic straight-edge knife sharpness detection equipment that can only measure the sharpness of the tool in the absence of ultrasonic vibration, the ultrasonic straight-edge knife sharpness detection equipment of the present invention can measure the ultrasonic cutting sharpness of the ultrasonic straight-edge knife 101 under the condition of ultrasonic vibration, further improving the accuracy of the ultrasonic cutting sharpness test of the ultrasonic straight-edge knife 101.

[0077] In order to facilitate the fixing of the test line 102 and ensure the stability of the test line 102, so as to ensure that the test results are more realistic, the main reference is Figure 4 In one embodiment, the wire clamping device 30 may include a wire fixing seat 31 with an opening and a fixed end component 32 and a non-fixed end component 33 arranged on the wire fixing seat 31. The fixed end component 32 and the non-fixed end component 33 are respectively located on both sides of the opening. The fixed end component 32 is used to compress one end of the test line 102, and the non-fixed end component 33 is used for winding the other end of the test line 102.

[0078] In this embodiment, one end of the test line 102 can be fixed by directly tightening the fixed end component 32, and the other end of the test line 102 can be straightened and wrapped around the non-fixed end component 33 and the bearing can be driven to rotate and tighten the test line 102 by rotating the bolt. Since the bearing is provided, the test line 102 will not loosen when tightening the bolt.

[0079] It should be noted that by setting the above structure, the cut point of the test line 102 can be located at the midpoint, that is, the cut point is in the middle of the above opening, thereby ensuring that the forces on both sides of the cut point are the same during cutting, making the test results more accurate.

[0080] The present invention also proposes an ultrasonic straight blade sharpness detection method, based on the above ultrasonic straight blade sharpness detection equipment, combined with Figures 1 to 7 , including the following steps:

[0081] S10, controlling the tool holding fixture to move to a target position and aligning the ultrasonic straight-edge knife to be tested;

[0082] S20, moving the wire clamping device to a cutting position;

[0083] S30, loading an ultrasonic signal onto the ultrasonic straight-edged knife to be tested, driving the ultrasonic straight-edged knife to be tested to cut the test line on the wire clamping device until the test line is severed;

[0084] S40, collecting the force during the cutting process to form a cutting force-time curve;

[0085] S50. Calculate the ultrasonic cutting sharpness according to the cutting force-time curve.

[0086] In this embodiment, the control terminal controls the second motion mechanism 60 to move the tool clamping fixture 20 to a predetermined position directly in front of the laser tool setting mechanism 70, and then the ultrasonic straight blade knife 101 is fixed to the tool handle 1011 through a threaded connection. The tool handle 1011 can rotate freely in the tool clamping fixture 20, and the tool is set by rotating the tool handle 1011. The tool handle 1011 and the tool clamping fixture 20 can be connected by screws. When the laser can cover both sides of the blade of the ultrasonic straight blade knife 101, it indicates that the tool is in a vertical state, which can ensure orthogonal cutting. At this time, tightening the screws completes the tool setting.

[0087] Of course, the ultrasonic straight blade knife 101 can also be connected and fixed to the handle 1011 first, and then the tool clamping fixture 20 can be controlled to move to the target position, and the driving mechanism can be controlled to drive the tool clamping fixture 20 to rotate for tool alignment. The specific tool alignment method is not limited here.

[0088] After the test line 102 is fixed on the wire clamping device 30 and the installed wire clamping device 30 is installed on the force measuring device 40, the position of the wire clamping device 30 is adjusted by controlling the first screw rod 51 and the second screw rod 52 of the first motion mechanism 50 so that it is located directly below the ultrasonic straight blade knife 101.

[0089] Then, the second motion mechanism 60 is controlled to move so that the blade of the ultrasonic straight-edge knife 101 is close to the test line 102. A control terminal such as a computer controls the second motion mechanism 60, causing the ultrasonic straight-edge knife 101 to cut the test line 102 at a constant speed, typically set at a speed range of 2-10 mm / min. After completely cutting the test line 102, the wire clamping device 30 is removed, and the ultrasonic straight-edge knife 101 is removed. The blade radius is then observed and recorded under an ultra-depth-of-field microscope, denoted as R2. Finally, the motion mechanism is reset.

[0090] During the cutting process, the force measuring device 40 records the stress during the cutting process and transmits it to the computer for processing to obtain a curve of cutting force and time.

[0091] Finally, the ultrasonic cutting sharpness of the ultrasonic straight-edge knife is calculated.

[0092] It can be understood that the present application controls the tool clamping tool 20 to move to the target position and align the to-be-tested ultrasonic straight blade knife 101; then moves the wire clamping device 30 to the cutting position; then loads the ultrasonic signal to the to-be-tested ultrasonic straight blade knife 101, drives the to-be-tested ultrasonic straight blade knife 101 to cut the test wire 102 on the wire clamping device 30 until the test wire 102 is cut off; collects the force in the cutting process to form a cutting force-time curve; finally, the ultrasonic cutting sharpness is calculated according to the cutting force-time curve. In this way, the ultrasonic cutting sharpness of the cutting edge of the ultrasonic straight blade knife 101 is measured, the accuracy of the test result is improved, and the ultrasonic cutting sharpness of the ultrasonic straight blade knife 101 is more truly reflected.

[0093] Further, as shown in the embodiment, the step S50 of calculating the ultrasonic cutting sharpness according to the cutting force-time curve can specifically include: Figures 5 to 7

[0094] S51, based on the cutting force-time curve in the cutting process, the cutting process is divided into vertical cutting process along the Z axis and horizontal vibration cutting process along the X axis, and the work done W1 and W2 are calculated respectively;

[0095] S52, according to the cutting length and the properties of the material itself, the first representation parameter of the ultrasonic cutting sharpness of the ultrasonic straight blade knife is calculated, and the calculation formula is:

[0096]

[0097]

[0098] f I =I1*I2

[0099] Wherein, I1 is a static cutting parameter based on a static cutting representation sharpness, I2 is an ultrasonic cutting parameter based on an ultrasonic vibration representation sharpness; f I is the first representation parameter of the sharpness of the ultrasonic straight blade knife; G is the fracture toughness of the cut material, γ is the ultrasonic vibration frequency, t is the time of the cutting process, D is the diameter of the cut material, and H is the Shore hardness of the cut material;

[0100] S53, based on the change of the small wedge angle edge radius of the ultrasonic straight blade knife before and after cutting, the second representation parameter of the sharpness of the ultrasonic straight blade knife is calculated, and the calculation formula is:

[0101] f II =R2-R1

[0102] Wherein, f II is the second representation parameter of the sharpness, R1 is the edge radius before cutting, and R2 is the edge radius after cutting; ​

[0103] S54. Calculate the ultrasonic cutting sharpness using the following formula:

[0104] f=f I *f II

[0105] That is,

[0106] Wherein, f is the ultrasonic cutting sharpness of the ultrasonic straight-edge knife.

[0107] In this embodiment, the specific calculation formulas of W1 and W2 are:

[0108]

[0109] Among them, Figure 6 As shown, F Z is the force along the Z axis obtained by the force measuring device, v Z is the speed of the ultrasonic straight-edge knife cutting the test line along the Z axis, and s is the vertical displacement;

[0110]

[0111] s=Ap*Sin(t)

[0112]

[0113] Among them, Figure 7 As shown, F Z V is the force along the X axis obtained by the force measuring device. Z is the speed of the ultrasonic straight-edge knife in the X-axis direction under ultrasonic vibration, s is the horizontal displacement of the ultrasonic straight-edge knife in the X-axis direction under ultrasonic vibration, and Ap is the ultrasonic amplitude.

[0114] In addition, in order to determine the above parameters R1 and R2, before the step S10 of controlling the tool clamping fixture to move to the target position and aligning the ultrasonic straight-edge knife to be tested, the following steps may be further included:

[0115] Measure the blade radius of the ultrasonic straight blade to be tested before cutting and record it as R1;

[0116] After the step S30 of loading the ultrasonic signal onto the ultrasonic straight-edged knife to be tested and driving the ultrasonic straight-edged knife to be tested to cut the test line on the wire clamping device until the test line is cut, the method further includes the following steps:

[0117] The blade radius of the ultrasonic straight-edge knife to be tested after cutting is measured and recorded as R2.

[0118] Before clamping the ultrasonic straight-edge knife 101, the ultrasonic straight-edge knife 101 needs to be placed under an ultra-depth-of-field microscope to observe and record the blade radius R1; after the cutting is completed and the ultrasonic straight-edge knife 101 is removed, it needs to be placed under an ultra-depth-of-field microscope to observe and record the blade radius R2.

[0119] The above descriptions are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present description and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A method for detecting the sharpness of an ultrasonic straight-edged knife, based on an ultrasonic straight-edged knife sharpness detection device, characterized in that: The ultrasonic straight-edge knife sharpness detection device comprises: Machine; A tool clamping tool is provided on the machine platform, wherein the tool clamping tool is provided with an ultrasonic loading unit for clamping the ultrasonic straight-edge knife to be tested and causing the ultrasonic straight-edge knife to be tested to vibrate under the action of ultrasound; A wire clamping device, mounted on the machine platform and located below the blade of the ultrasonic straight-blade knife to be tested, for fixing the test wire; a force measuring device, disposed at the bottom of the wire clamping device and used to detect the cutting force exerted on the cut test wire; and a control terminal connected to the force measuring device signal and used to determine the ultrasonic cutting sharpness of the ultrasonic straight-edge knife to be tested according to the cutting force; The ultrasonic straight-edge knife sharpness detection method comprises the following steps: Controlling the tool holding fixture to move to a target position and aligning the ultrasonic straight-edged knife to be tested; Moving the wire clamping device to a cutting position; Loading an ultrasonic signal to the ultrasonic straight-edged knife to be tested, driving the ultrasonic straight-edged knife to be tested to cut the test wire on the wire clamping device until the test wire is cut off; Collect the force during the cutting process to form a cutting force-time curve; According to the cutting force-time curve, the ultrasonic cutting sharpness is calculated; The step of calculating the ultrasonic cutting sharpness according to the cutting force-time curve specifically includes: Based on the cutting force-time curve during the cutting process, the cutting process is divided into the vertical cutting process along the Z axis and the horizontal vibration cutting process along the X axis, and the work done W1 and W2 are calculated respectively; According to the cutting length and the properties of the material itself, the first characterization parameter of the ultrasonic cutting sharpness of the ultrasonic straight blade is calculated. The calculation formula is: f I =I1*I2 Wherein, I1 is the static cutting parameter based on static cutting to characterize sharpness, and I2 is the ultrasonic cutting parameter based on ultrasonic vibration to characterize sharpness; f I is the first characterizing parameter of the sharpness of the ultrasonic straight-edge knife; G is the fracture toughness of the cut material, γ is the ultrasonic vibration frequency, t is the time of the cutting process, D is the diameter of the cut material, and H is the Shore hardness of the cut material; Based on the change of the small wedge angle edge radius of the ultrasonic straight-edge knife before and after cutting, the second characterization parameter of the ultrasonic cutting sharpness of the ultrasonic straight-edge knife is calculated, and the calculation formula is: f II =R2-R1 Among them, f II is the second characterization parameter of sharpness, R1 is the edge radius before cutting, and R2 is the edge radius after cutting; Calculate the ultrasonic cutting sharpness, the calculation formula is: f=f I *f II Wherein, f is the ultrasonic cutting sharpness of the ultrasonic straight-edge knife.

2. The ultrasonic straight-edge knife sharpness detection method according to claim 1, characterized in that: The ultrasonic straight-edge knife sharpness detection equipment also includes a first motion mechanism, which is arranged on the machine platform, the force measuring device is arranged on the first motion mechanism, and the wire clamping device is arranged on the force measuring device. The first motion mechanism is used to drive the force measuring device and the wire clamping device thereon to move along a first direction and a second direction, wherein the first direction is perpendicular to the second direction.

3. The ultrasonic straight-edge knife sharpness detection method according to claim 2, wherein: The first motion mechanism includes a first screw rod and a second screw rod. The first screw rod and the second screw rod are both provided with a slider, and the force measuring device is fixed on the slider.

4. The ultrasonic straight-edge knife sharpness detection method according to claim 2, wherein: The ultrasonic straight blade sharpness detection equipment also includes a second motion mechanism, which is arranged on the machine platform through a mounting plate, and the tool clamping tool is arranged on the second motion mechanism. The second motion mechanism is used to drive the tool clamping tool to move along a third direction, and the third direction is perpendicular to the first direction and the second direction respectively.

5. The ultrasonic straight-edge knife sharpness detection method according to claim 1, wherein: The tool clamping tool is provided with a knife handle for fixing the ultrasonic straight-edged knife to be tested, and the knife handle is provided with the ultrasonic loading unit, and the ultrasonic loading unit includes a transmission coil. The ultrasonic straight-edged knife sharpness detection equipment also includes a power supply device arranged on the machine platform, and the power supply device loads the ultrasonic signal to the ultrasonic straight-edged knife to be tested through the transmission coil.

6. The ultrasonic straight-edge knife sharpness detection method according to claim 1, wherein: The ultrasonic straight-edge knife sharpness detection device further includes a laser knife setting mechanism, which is fixed to and located on the machine platform to calibrate the blade direction of the ultrasonic straight-edge knife to be tested; and / or The wire clamping device includes a wire fixing seat with an opening and a fixed end component and a non-fixed end component arranged on the wire fixing seat. The fixed end component and the non-fixed end component are respectively located on both sides of the opening. The fixed end component is used to press one end of the test line, and the non-fixed end component is used for winding the other end of the test line.

7. The ultrasonic straight-edge knife sharpness detection method according to claim 1, wherein: The specific calculation formulas of W1 and W2 are: Among them, F Z is the force along the Z axis obtained by the force measuring device, v Z The speed of the ultrasonic straight-edge knife cutting the test line along the Z axis is set; Among them, F X is the force along the X-axis obtained by the force measuring device, and Ap is the ultrasonic amplitude.

8. The ultrasonic straight-edge knife sharpness detection method according to claim 1, wherein: Before the step of controlling the tool clamping fixture to move to the target position and aligning the ultrasonic straight-edge knife to be tested, the method further includes the following steps: Measure the blade radius of the ultrasonic straight blade to be tested before cutting and record it as R1; After the step of loading the ultrasonic signal onto the ultrasonic straight-edged knife to be tested and driving the ultrasonic straight-edged knife to be tested to cut the test line on the wire clamping device until the test line is cut, the method further includes the following steps: The blade radius of the ultrasonic straight-edge knife to be tested after cutting is measured and recorded as R2.

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