A method and device for detecting the sharpness of ultrasonic cutting with a disc cutter

Abstract

This invention discloses a method and device for detecting the ultrasonic cutting sharpness of a disc cutter. The method calculates the cutting attenuation coefficient of the disc cutter's cutting edge by recording the small wedge angle radius before and after cutting the material. It also establishes curves showing the change in force magnitude and time as the disc cutter moves along the X and Y axes to cut the material, dividing the cutting process into three stages. The ultrasonic cutting sharpness of the disc cutter is then calculated based on the work done by the disc cutter in these three stages, the small wedge angle radius before and after cutting, the cutting time, the cutting length, the vertical vibration work during the cutting process, the ultrasonic vibration frequency, and the hardness and fracture toughness of the material being cut. This method improves the accuracy of ultrasonic cutting tests and more accurately reflects the ultrasonic cutting sharpness of the disc cutter under ultrasonic vibration conditions.

Description

Technical Field

[0001] This invention relates to the field of disc cutter machining technology, and specifically to a method and device for detecting the sharpness of ultrasonic cutting with a disc cutter. Background Technology

[0002] Honeycomb composite materials are widely used in the aerospace industry. These materials offer significant advantages, possessing excellent mechanical and electromagnetic properties, but require high-precision machining. Machining honeycomb materials necessitates the use of specialized cutting tools. Disk cutters, with their sharp, wedge-shaped edges, are ideal for machining these materials. However, high-speed cutting with disk cutters can lead to chipping or chip adhesion, and as the tool's sharpness decreases, cutting performance weakens significantly, resulting in lower machining quality. To obtain products with excellent machining quality and stable dimensional accuracy, the cutting edge of the ultrasonic cutter needs to be sufficiently sharp. Therefore, testing the sharpness of ultrasonic disk cutters is extremely important.

[0003] Currently, tool sharpness testing is mainly conducted during static cutting under non-ultrasonic conditions. However, disc cutter machining involves complex motions including feed motion, high-frequency vibration, and high-speed rotation. The cutting mechanism and tool failure mechanisms have undergone significant changes compared to static cutting. According to the dynamic analysis theory of continuous elastic bodies, in non-ultrasonic cutting, the cutting force acts statically on the workpiece, causing the workpiece to develop cracks under shear stress and propagate until fracture. In ultrasonic vibration cutting, the failure process is not solely due to static cutting of the material, but more importantly, the dynamic cutting force generated by ultrasonic vibration perpendicular to the static force direction. This increases the actual instantaneous cutting speed, thereby reducing the resistance deformation around the cutting point and concentrating the force more at the cutting point. Therefore, traditional single sharpness testing devices and methods cannot truly reflect the ultrasonic cutting sharpness of disc cutters under ultrasonic vibration conditions. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that the existing disc cutter sharpness testing devices and methods cannot truly reflect the defects of the ultrasonic cutting sharpness of the disc cutter under ultrasonic vibration conditions, and thus provides a method for detecting the ultrasonic cutting sharpness of the disc cutter.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] A method for detecting the sharpness of ultrasonic cutting with a disc cutter includes the following steps:

[0007] During the process of the disc cutter cutting the material, the disc cutter is driven to cut the material at a uniform speed of rotation speed n, feed speed V, ultrasonic amplitude Ap and ultrasonic vibration frequency γ; the small wedge angle cutting edge radius R1 before cutting and the small wedge angle cutting edge radius R2 after cutting are recorded.

[0008] During the cutting process, the magnitude of the force F on the disc cutter is measured in real time; the Fx-t curve is established based on the relationship between the magnitude of the force Fx on the disc cutter in the X-axis direction and time t; the Fy-t curve is established based on the relationship between the magnitude of the force Fy on the disc cutter in the Y-axis direction and time t; and the Fz-t curve is established based on the relationship between the magnitude of the force Fz on the disc cutter in the Z-axis direction and time t.

[0009] Based on the curves of Fx-t, Fy-t, and Fz-t, the disc cutter cutting process is divided into the entry stage, the stable cutting stage, and the exit stage, and the entry work W1, stable cutting work W2, exit work W3, and vertical vibration work W4 are calculated respectively.

[0010] The ultrasonic cutting sharpness of the disc cutter is calculated based on the following parameters: the radius R1 of the small wedge-shaped cutting edge before cutting, the radius R2 of the small wedge-shaped cutting edge after cutting, the cutting energy W1, the stable cutting energy W2, the cutting energy W3, the vertical vibration energy W4, the time t of each cutting stage, and the cutting length L of each cutting stage. The calculation formula is as follows:

[0011]

[0012] Where f is the ultrasonic cutting sharpness of the disc cutter, G is the fracture toughness of the material being cut, t1 is the time from the start of cutting to the end of the infeed stage, t2 is the time from the start of cutting to the end of the stable cutting stage, t3 is the time from the start of cutting to the end of the cutout stage, L1 is the cutting length of the infeed stage, L2 is the cutting length of the stable cutting stage, L3 is the cutting length of the cutout stage, γ is the ultrasonic vibration frequency, and H is the Shore hardness of the material being cut.

[0013] Furthermore, the calculation method for the cutting-in work W1 is as follows:

[0014]

[0015] because

[0016] Therefore, the entry point

[0017] The method for calculating the stable cutting work W2 is as follows:

[0018] The method for calculating the cut-out work W3 is as follows:

[0019] The calculation method for the vertical vibration work W4 is as follows:

[0020]

[0021] Since S is the displacement function along the Z direction, S = Ap * Sin(t).

[0022] Therefore, the work done in the vertical direction of vibration

[0023] Where F is the magnitude of the force on the disc cutter, Fx is the magnitude of the force on the disc cutter in the X-axis direction, and Fy is the magnitude of the force on the disc cutter in the Y-axis direction; V is the feed rate of the disc cutter, and Vx is the feed rate of the disc cutter in the X-axis direction.

[0024] Furthermore, images of the cutting process are acquired to obtain the time points of the entry stage, the stable cutting stage, and the exit stage. The start time point of the entry stage is the time when the disc cutter contacts the material being cut, and the end time point of the entry stage is the time when the depth of cut of the disc cutter into the material being cut reaches a preset value. The start time point of the stable cutting stage is the end time point of the entry stage, and the end time point of the stable cutting stage is the time when the disc cutter begins to cut out of the material being cut along the cutting direction. The start time point of the exit stage is the end time point of the stable cutting stage, and the end time point of the exit stage is the time when Fx and Fy decrease to zero.

[0025] Furthermore, the disc cutter has a rotational speed n of 800-3000 rpm, a feed speed V of 3000-10000 mm / min, an ultrasonic amplitude Ap of 20-30 micrometers, and an ultrasonic vibration frequency γ of 20-30 kHz.

[0026] Furthermore, a disc cutter ultrasonic cutting sharpness testing device employing any one of the above-described methods for detecting the sharpness of ultrasonic cutting of a disc cutter includes a loading platform and a disc cutter motion mechanism, a disc cutter clamping mechanism, a material-to-be-cut motion mechanism, a material-to-be-cut clamping mechanism, an industrial camera, and a control terminal mounted on the loading platform. The disc cutter motion mechanism can drive the disc cutter clamping mechanism to move along the Z-axis. A disc cutter is mounted on the disc cutter clamping mechanism and can drive the disc cutter to rotate. The disc cutter clamping mechanism is equipped with... An ultrasonic generator is provided, which drives the disc cutter to vibrate. The material-to-be-cutting motion mechanism drives the material-to-be-cutting clamping mechanism to move along the X and Y axes. The material-to-be-cutting clamping mechanism is equipped with a force gauge. The material-to-be-cutting clamping mechanism is used to clamp the material to be cut and to measure the cutting force of the material when it is cut by the disc cutter using the force gauge. An industrial camera is used to record images of the cutting process. A control terminal is connected to the force gauge and the industrial camera and is used to determine the ultrasonic cutting sharpness of the disc cutter based on the cutting force.

[0027] Furthermore, the disc cutter motion mechanism includes a lifting drive unit mounted on the loading platform and a lifting screw connected to the drive rod of the lifting drive unit. The disc cutter clamping mechanism is mounted on the lifting screw via a slider to move along the lifting screw in the Z-axis direction.

[0028] Furthermore, the disc blade clamping mechanism includes a rotary motor connected to the slider, an ultrasonic blade handle connected to the rotating shaft of the rotary motor, an ultrasonic generator disposed on the ultrasonic blade handle, the disc blade being detachably mounted on the ultrasonic blade handle, and the rotary motor being adapted to drive the disc blade to rotate at high speed.

[0029] Furthermore, the material cutting motion mechanism includes an X-axis drive rod mounted on the loading platform and a Y-axis drive rod movably mounted on the X-axis drive rod, and a material cutting clamping mechanism is mounted on the Y-axis drive rod.

[0030] Furthermore, the material clamping mechanism includes a fixed seat mounted on the Y-axis drive rod, a rotating seat rotatably mounted on the fixed seat, and a turntable mounted on the rotating seat, with the force gauge mounted on the turntable.

[0031] Furthermore, the fixed base is provided with a Y-axis rotation mechanism suitable for driving the rotating base to rotate around the Y-axis, and the rotating base is provided with a Z-axis rotation mechanism suitable for driving the turntable to rotate around the Z-axis; the force measuring instrument is provided with a clamp, which is suitable for clamping the material.

[0032] The technical solution of this invention has the following advantages:

[0033] 1. The ultrasonic cutting sharpness testing method for a disc cutter provided by this invention calculates the cutting attenuation coefficient of the disc cutter edge by recording the small wedge angle radius before and after the disc cutter cuts the material. By establishing the change curves of the force magnitude and force time of the disc cutter moving on the X and Y axes to cut the material, the process of the disc cutter cutting the material is divided into three stages. Then, based on the work done by the disc cutter in the three stages, the small wedge angle radius before and after cutting, the cutting time, the cutting length, the vertical vibration work in the cutting process, the ultrasonic vibration frequency, and the hardness and fracture toughness of the material being cut, the ultrasonic cutting sharpness of the disc cutter is calculated. This improves the accuracy of ultrasonic cutting tests of disc cutters under ultrasonic vibration conditions and more accurately reflects the ultrasonic cutting sharpness of disc cutters under ultrasonic vibration conditions.

[0034] 2. The ultrasonic cutting sharpness detection method for disc cutters provided by the present invention includes setting a force gauge on the detection device, placing the material to be cut on the force gauge, and moving the force gauge to the cutting position through the drive mechanism on the material to be cut movement mechanism. The disc cutter is then installed on the disc cutter movement mechanism, and the disc cutter is driven to move up and down through the lifting drive component on the disc cutter movement mechanism to cut the material to be cut, thus ensuring the dynamic cutting state of the disc cutter.

[0035] 3. The ultrasonic cutting sharpness testing method for a disc cutter provided by the present invention includes a material clamping mechanism comprising a fixed base mounted on the Y-axis drive rod, a rotating base rotatably mounted on the fixed base, and a turntable mounted on the rotating base, wherein the force gauge is mounted on the turntable. This configuration allows adjustment of the position and angle of the material being cut to meet cutting test requirements. Attached Figure Description

[0036] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0037] Figure 1 This is a side view of the ultrasonic cutting sharpness detection device for disc cutters provided by the present invention.

[0038] Figure 2 A three-dimensional structural diagram of the ultrasonic cutting sharpness detection device for a disc cutter provided by the present invention;

[0039] Figure 3 This is a three-dimensional structural diagram of the material clamping mechanism in this invention;

[0040] Figure 4 This is a schematic diagram showing the connection relationship between the disc cutter clamping mechanism and the disc cutter in this invention;

[0041] Figure 5 The pressure-time curves of the X and Y axes in the ultrasonic cutting sharpness detection method for disc cutters provided by the present invention;

[0042] Figure 6 The pressure versus time curve of the Y-axis in the ultrasonic cutting sharpness detection method for disc cutters provided by the present invention;

[0043] Figure 7 This is a schematic diagram of the force analysis of the force measuring instrument provided in an embodiment of the present invention;

[0044] Figure 8 This is a schematic diagram of the ultrasonic cutting process of a disc cutter provided in an embodiment of the present invention;

[0045] Figure 9 The present invention provides schematic diagrams of each stage of the ultrasonic cutting process using a disc cutter in an embodiment of the present invention.

[0046] Explanation of reference numerals in the attached figures:

[0047] 1. Loading platform; 11. Mounting plate; 2. Disc cutter motion mechanism; 21. Lifting drive component; 22. Lifting screw; 23. Slide rod; 24. Sliding sleeve; 25. Mounting sleeve; 3. Disc cutter clamping mechanism; 31. Rotary motor; 32. Ultrasonic cutter handle; 33. Cutter bar; 34. Disc cutter; 35. Ultrasonic generator; 4. Material motion mechanism; 41. X-axis drive rod; 42. Y-axis drive rod; 5. Material clamping mechanism; 51. Fixed seat; 52. Rotating seat; 53. Turntable; 54. Force gauge; 55. Fixture; 56. Aluminum plate; 57. Y-axis rotation mechanism; 58. Z-axis rotation mechanism; 6. Material. Detailed Implementation

[0048] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0049] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0050] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0052] like Figure 5-7 The method for detecting the sharpness of ultrasonic cutting with a disc cutter, as shown, includes the following steps:

[0053] During the process of the disc cutter cutting the material, the disc cutter is driven to cut the material at a uniform speed of rotation speed n, feed speed V, ultrasonic amplitude Ap and ultrasonic vibration frequency γ; the small wedge angle cutting edge radius R1 before cutting and the small wedge angle cutting edge radius R2 after cutting are recorded.

[0054] During the cutting process, the magnitude of the force F on the disc cutter is measured in real time; the Fx-t curve is established based on the relationship between the magnitude of the force Fx on the disc cutter in the X-axis direction and time t; the Fy-t curve is established based on the relationship between the magnitude of the force Fy on the disc cutter in the Y-axis direction and time t; and the Fz-t curve is established based on the relationship between the magnitude of the force Fz on the disc cutter in the Z-axis direction and time t.

[0055] Based on the curves of Fx-t, Fy-t, and Fz-t, the disc cutter cutting process is divided into the entry stage, the stable cutting stage, and the exit stage, and the entry work W1, stable cutting work W2, exit work W3, and vertical vibration work W4 are calculated respectively.

[0056] The ultrasonic cutting sharpness of the disc cutter is calculated based on the following parameters: the radius R1 of the small wedge-shaped cutting edge before cutting, the radius R2 of the small wedge-shaped cutting edge after cutting, the cutting energy W1, the stable cutting energy W2, the cutting energy W3, the vertical vibration energy W4, the time t of each cutting stage, and the cutting length L of each cutting stage. The calculation formula is as follows:

[0057]

[0058] Where f is the ultrasonic cutting sharpness of the disc cutter, G is the fracture toughness of the material being cut, t1 is the time from the start of cutting to the end of the infeed stage, t2 is the time from the start of cutting to the end of the stable cutting stage, t3 is the time from the start of cutting to the end of the cutout stage, L1 is the cutting length of the infeed stage, L2 is the cutting length of the stable cutting stage, L3 is the cutting length of the cutout stage, γ is the ultrasonic vibration frequency, and H is the Shore hardness of the material being cut.

[0059] This method for testing the ultrasonic cutting sharpness of a disc cutter calculates the cutting attenuation coefficient by recording the small wedge angle radius of the disc cutter before and after cutting the material. It establishes curves showing the change in force magnitude and time as the disc cutter moves along the X and Y axes, dividing the cutting process into three stages. Based on the work done by the disc cutter in these three stages, the small wedge angle radius before and after cutting, the cutting time, the cutting length, the vertical vibration work during the cutting process, the ultrasonic vibration frequency, and the hardness and fracture toughness of the material being cut, the ultrasonic cutting sharpness of the disc cutter is calculated. This method improves the accuracy of ultrasonic cutting tests under ultrasonic vibration conditions and more accurately reflects the ultrasonic cutting sharpness of the disc cutter under ultrasonic vibration conditions.

[0060] In this embodiment, the cutting work W1 is calculated as follows:

[0061]

[0062] because

[0063] Therefore, the entry point

[0064] The method for calculating the stable cutting work W2 is as follows:

[0065] The method for calculating the cut-out work W3 is as follows:

[0066] Where F is the magnitude of the force on the disc cutter, Fx is the magnitude of the force on the disc cutter in the X-axis direction, and Fy is the magnitude of the force on the disc cutter in the Y-axis direction; V is the feed rate of the disc cutter, and Vx is the feed rate of the disc cutter in the X-axis direction.

[0067] In this embodiment, as Figure 9 As shown, images of the cutting process are acquired to obtain the time points of the entry phase, the stable cutting phase, and the exit phase. The start time point of the entry phase is the time point when the disc cutter contacts the material being cut (reference). Figure 9 a) The end time of the cutting phase is the time when the disc cutter reaches the preset cutting depth in the material being cut (refer to...). Figure 9 b) The start time of the stable cutting phase is the end time of the infeed phase, and the end time of the stable cutting phase is the time when the disc cutter begins to cut out of the material along the cutting direction (refer to...). Figure 9 c) The start time of the cutting phase is the end time of the stable cutting phase, and the end time of the cutting phase is the time when Fx and Fy decrease to zero.

[0068] Specifically, the disc cutter rotates at a speed n of 800-3000 rpm, and the feed speed V of the disc cutter is 3000-10000 mm / min.

[0069] In this embodiment, the specific values ​​of the small wedge angle cutting edge radius before and after the disc cutter cuts the material are observed and recorded using an ultra-depth-of-field microscope.

[0070] An ultrasonic cutting sharpness testing device for a disc cutter employing any one of the above-described methods, such as... Figure 1-4 As shown, the ultrasonic cutting sharpness testing device for a disc cutter includes a loading platform 1 and a disc cutter motion mechanism 2, a disc cutter clamping mechanism 3, a material to be cut motion mechanism 4, a material to be cut clamping mechanism 5, an industrial camera, and a control terminal mounted on the loading platform 1. The disc cutter motion mechanism 2 can drive the disc cutter clamping mechanism 3 to move along the Z-axis. A disc cutter 34 is mounted on the disc cutter clamping mechanism 3 and can be driven to rotate. The disc cutter clamping mechanism 3 is equipped with an ultrasonic generator 35, which can drive the disc cutter 34 to rotate. The disc cutter 34 vibrates, and the material-to-be-cutting motion mechanism 4 drives the material-to-be-cutting clamping mechanism 5 to move along the X and Y axes. The material-to-be-cutting clamping mechanism 5 is equipped with a force gauge 54. The material-to-be-cutting clamping mechanism 5 is used to clamp the material 6 to be cut and measures the cutting force of the material 6 when it is cut by the disc cutter 34 through the force gauge. The industrial camera is used to record images of the cutting process. The control terminal is connected to the force gauge 54 and the industrial camera and is used to determine the ultrasonic cutting sharpness of the disc cutter 34 based on the cutting force. The control terminal can be a computer or other similar device.

[0071] In this embodiment, the disc cutter motion mechanism 2 includes a lifting drive 21 mounted on the loading platform 1 and a lifting screw 22 connected to the drive rod of the lifting drive 21. The disc cutter clamping mechanism 3 is mounted on the lifting screw 22 via a slider so as to move along the lifting screw 22 in the Z-axis direction.

[0072] In this embodiment, the disc blade clamping mechanism 3 includes a rotary motor 31 connected to the slider and an ultrasonic blade holder 32 connected to the rotating shaft of the rotary motor 31. The ultrasonic blade holder 32 is connected to the rotating shaft of the rotary motor 31 via a hydraulic chuck. Specifically, an ultrasonic generator 35 is provided on the ultrasonic blade holder 32. A blade rod 33 is connected to the end of the ultrasonic blade holder 32 away from the rotary motor 31. The disc blade 34 is connected to the end of the blade rod 33 away from the ultrasonic blade holder 32 by fastening screws. Specifically, the blade rod 33 is detachably installed in the mounting hole of the ultrasonic blade holder 32 and locked by tightening bolts. The rotary motor 31 is adapted to drive the ultrasonic blade holder 32 to rotate at high speed, thereby driving the blade rod 33 and the disc blade 34 on the blade rod 33 to rotate at high speed.

[0073] Specifically, the ultrasonic generator 35 can drive the ultrasonic scalpel handle 32 to drive the disc scalpel 34 to perform axial high-frequency vibration, with an amplitude Ap of 20-30 micrometers and a vibration frequency γ of 20-30KHz.

[0074] In this embodiment, a mounting plate 11 is fixed on the loading platform 1, and two sliding rods 23 are fixed on the mounting plate 11. A lifting screw 22 is located between the two sliding rods 23, and a sliding sleeve 24 is fitted on each of the two sliding rods 23. A mounting sleeve 25 is fixed on each of the two sliding sleeves 24, and the rotating motor 31 is fixed inside the mounting sleeve 25 by fastening bolts. With this arrangement, the two sliding rods 23 can guide the disc cutter 34 when it is driven to rise and fall by the lifting drive component 21, and at the same time enhance the stability of the disc cutter 34 during the lifting movement.

[0075] In this embodiment, the material cutting motion mechanism 4 includes an X-axis drive rod 41 mounted on the loading platform 1 and a Y-axis drive rod 42 movably mounted on the X-axis drive rod 41. The material cutting clamping mechanism 5 is mounted on the Y-axis drive rod 42.

[0076] In this embodiment, the material clamping mechanism 5 includes a fixed base 51 mounted on the Y-axis drive rod 42, a rotating base 52 rotatably mounted on the fixed base 51, and a turntable 53 mounted on the rotating base 52. A force gauge 54 is mounted on the turntable 53. This configuration allows for adjustment of the position and angle of the material 6 to be cut, thereby meeting the requirements of the cutting test. Specifically, the fixed base 51 is equipped with a Y-axis rotation mechanism 57 suitable for driving the rotating base 52 to rotate around the Y-axis, and the rotating base 52 is equipped with a Z-axis rotation mechanism 58 suitable for driving the turntable 53 to rotate around the Z-axis. A clamp 55 is bolted to the force gauge 54, and the clamp 55 is suitable for clamping the material 6 to be cut. Specifically, an aluminum plate 56 is bolted to the clamp 55, and the material 6 to be cut is fixed to the aluminum plate 56 with hot melt adhesive. The clamp 55 is then adjusted to hold the material 6 to be cut, further securing it and effectively preventing displacement or detachment of the material 6 from the clamp 55 during the cutting process. Specifically, the side of the aluminum plate 56 used to fix the material 6 is a smooth, flat surface.

[0077] Specifically, the Y-axis drive rod 42 moves 0-1000mm on the X-axis drive rod 41 with a movement accuracy of 0-0.1mm; the fixed base 51 moves 0-2000mm on the Y-axis drive rod 42 with a movement accuracy of 0-0.1mm.

[0078] In this embodiment, the material 6 to be cut is specifically a honeycomb material. In alternative embodiments, the shape and size of the honeycomb material can be adjusted according to requirements.

[0079] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A method for detecting the sharpness of ultrasonic cutting with a disc cutter, characterized in that, Includes the following steps: During the process of a disc cutter cutting the material, the disc cutter is driven by a rotational speed n, a feed speed V, an ultrasonic amplitude Ap, and an ultrasonic vibration frequency. Cutting the material at a uniform speed; Record the small wedge angle and cutting edge radius of the disc cutter before cutting. and the radius of the small wedge-shaped cutting edge after cutting ; During the cutting process, the magnitude of the force F on the disc cutter is measured in real time; based on the magnitude of the force on the disc cutter in the X-axis direction... Establishing the relationship with time t The curve of -t variation depends on the magnitude of the force applied to the disc cutter in the Y-axis direction. Establishing the relationship with time t The curve of -t variation; based on the magnitude of the force applied to the disc cutter in the Z-axis direction. Establishing the relationship with time t The curve of -t variation; according to -t variation curve, The curve of -t change and The curve of -t divides the disc cutter cutting process into three stages: the entry stage, the stable cutting stage, and the exit stage, and calculates the entry work for each stage. Stable cutting function Cutting out Vertical vibration work ; Based on the small wedge angle and cutting edge radius of the disc cutter before cutting. The radius of the small wedge-shaped cutting edge after disc cutting. Entry point Stable cutting function Cutting out Vertical vibration work The ultrasonic cutting sharpness of the disc cutter is calculated based on the time t and cutting length L of each cutting stage. The calculation formula is as follows: ； in, G represents the ultrasonic cutting sharpness of the disc cutter, and G represents the fracture toughness of the material being cut. This refers to the time from the start of cutting to the end of the cutting phase. This refers to the time from the start of cutting to the end of the stable cutting phase. This refers to the time from the start of cutting to the end of the cutting stage. This refers to the cutting length during the entry phase. To stabilize the cutting length during the cutting phase, This refers to the cutting length during the cutting stage. H is the ultrasonic vibration frequency, and H is the Shore hardness of the material being cut.

2. The method for detecting the sharpness of ultrasonic cutting with a disc cutter according to claim 1, characterized in that, The cutting-in power The calculation method is as follows: ; The stable cutting power The calculation method is as follows: ; The cutting work The calculation method is as follows: ; The vertical vibration work The calculation method is as follows: ； in, This represents the magnitude of the force acting on the disc cutter in the X-axis direction. This represents the magnitude of the force acting on the disc cutter in the Y-axis direction. This represents the magnitude of the force acting on the disc cutter in the Z-axis direction; This represents the feed rate of the disc cutter in the X-axis direction.

3. The method for detecting the sharpness of ultrasonic cutting with a disc cutter according to claim 1, characterized in that, Images of the cutting process are acquired to obtain the time points of the entry phase, the stable cutting phase, and the exit phase. The start time point of the entry phase is the time when the disc cutter contacts the material being cut, and the end time point of the entry phase is the time when the disc cutter reaches a preset cutting depth in the material. The start time point of the stable cutting phase is the end time point of the entry phase, and the end time point of the stable cutting phase is the time when the disc cutter begins to cut out of the material along the cutting direction. The start time point of the exit phase is the end time point of the stable cutting phase, and the end time point of the exit phase is... and The point in time when it decreases to zero.

4. The method for detecting the sharpness of ultrasonic cutting with a disc cutter according to claim 1, characterized in that, The rotational speed n of the disc cutter is 800-3000 rpm, the feed speed V of the disc cutter is 3000-10000 mm / min, the ultrasonic amplitude Ap is 20-30 micrometers, and the ultrasonic vibration frequency is... The frequency range is 20-30kHz.

5. A device for detecting the sharpness of ultrasonic cutting of a disc cutter using the method for detecting the sharpness of ultrasonic cutting of a disc cutter according to any one of claims 1-4, characterized in that, The ultrasonic cutting sharpness testing device for the disc cutter includes a loading platform (1) and a disc cutter motion mechanism (2), a disc cutter clamping mechanism (3), a material-to-be-cutting motion mechanism (4), a material-to-be-cutting clamping mechanism (5), an industrial camera, and a control terminal mounted on the loading platform. The disc cutter motion mechanism (2) can drive the disc cutter clamping mechanism (3) to move along the Z-axis. A disc cutter (34) is mounted on the disc cutter clamping mechanism (3) and can drive the disc cutter (34) to rotate. The disc cutter clamping mechanism (3) is equipped with an ultrasonic generator (35), which can drive the disc cutter. (34) Vibration, the material being cut movement mechanism (4) can drive the material being cut clamping mechanism (5) to move along the X-axis and Y-axis directions. The material being cut clamping mechanism (5) is equipped with a force measuring instrument (54). The material being cut clamping mechanism (5) is used to clamp the material being cut (6) and measure the cutting force of the material being cut (6) when it is cut by the disc cutter (34) through the force measuring instrument (54). The industrial camera is used to record the image of the cutting process. The control terminal is connected to the force measuring instrument (54) and the industrial camera and is used to determine the ultrasonic cutting sharpness of the disc cutter (34) according to the cutting force.

6. The ultrasonic cutting sharpness testing device for disc cutters according to claim 5, characterized in that, The disc cutter motion mechanism (2) includes a lifting drive (21) mounted on the loading platform (1) and a lifting screw (22) connected to the drive rod of the lifting drive (21). The disc cutter clamping mechanism (3) is mounted on the lifting screw (22) via a slider to move along the Z-axis direction of the lifting screw (22).

7. The ultrasonic cutting sharpness testing device for disc cutters according to claim 6, characterized in that, The disc blade clamping mechanism (3) includes a rotating motor (31) connected to the slider and an ultrasonic blade handle (32) connected to the rotating shaft of the rotating motor (31). The ultrasonic generator (35) is disposed on the ultrasonic blade handle (32). The disc blade (34) is detachably mounted on the ultrasonic blade handle (32). The rotating motor (31) is adapted to drive the disc blade (34) to rotate at high speed.

8. The ultrasonic cutting sharpness testing device for disc cutters according to claim 5, characterized in that, The material cutting motion mechanism (4) includes an X-axis drive rod (41) mounted on the loading platform (1) and a Y-axis drive rod (42) movably mounted on the X-axis drive rod (41). A material cutting clamping mechanism (5) is mounted on the Y-axis drive rod (42).

9. The ultrasonic cutting sharpness testing device for disc cutters according to claim 8, characterized in that, The material clamping mechanism (5) includes a fixed seat (51) mounted on the Y-axis drive rod (42), a rotating seat (52) rotatably mounted on the fixed seat (51), and a turntable (53) mounted on the rotating seat (52). The force measuring instrument (54) is mounted on the turntable (53).

10. The ultrasonic cutting sharpness detection device for a disc cutter according to claim 9, characterized in that, The fixed base (51) is provided with a Y-axis rotation mechanism (57) suitable for driving the rotating base (52) to rotate around the Y-axis, and the rotating base (52) is provided with a Z-axis rotation mechanism (58) suitable for driving the turntable (53) to rotate around the Z-axis; the force measuring instrument (54) is provided with a clamp (55) suitable for clamping the material to be cut (6).

Images