CN116698654A - Ultrasonic cutting sharpness detection method and device for circular cutter - Google Patents

Ultrasonic cutting sharpness detection method and device for circular cutter Download PDF

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Publication number
CN116698654A
CN116698654A CN202310796378.6A CN202310796378A CN116698654A CN 116698654 A CN116698654 A CN 116698654A CN 202310796378 A CN202310796378 A CN 202310796378A CN 116698654 A CN116698654 A CN 116698654A
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China
Prior art keywords
cutting
cutter
ultrasonic
cut
disc
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CN202310796378.6A
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Chinese (zh)
Inventor
蔡晓康
刘超
邓泽榕
李虎
姜恩来
林亮亮
龙东洋
洪培强
范超颖
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Xiamen Tungsten Co Ltd
Xiamen Golden Egret Special Alloy Co Ltd
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Xiamen Tungsten Co Ltd
Xiamen Golden Egret Special Alloy Co Ltd
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Priority to CN202310796378.6A priority Critical patent/CN116698654A/en
Publication of CN116698654A publication Critical patent/CN116698654A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/58—Investigating machinability by cutting tools; Investigating the cutting ability of tools
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/04—Chucks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/06—Special adaptations of indicating or recording means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

The invention discloses a method and a device for detecting ultrasonic cutting sharpness of a disc cutter, which are characterized in that the cutting attenuation coefficient of the cutting edge of the disc cutter is calculated by recording the small wedge angle cutting edge radius before and after the disc cutter cuts a material to be cut, the process of cutting the material to be cut by the disc cutter is divided into three stages by establishing a change curve of the stress magnitude and the stress time of the disc cutter for moving the disc cutter on an X axis and a Y axis, and then the ultrasonic cutting sharpness of the disc cutter is calculated according to the work made by the disc cutter in the three stages, the small wedge angle cutting edge radius before and after the cutting, the cutting time, the cutting length, the vertical vibration work in the cutting process, the ultrasonic vibration frequency, the hardness and the fracture toughness of the material to be cut, so that the accuracy of ultrasonic cutting test of the disc cutter is improved, and the ultrasonic cutting sharpness of the disc cutter can be reflected more truly under the ultrasonic vibration working condition.

Description

Ultrasonic cutting sharpness detection method and device for circular cutter
Technical Field
The invention relates to the technical field of disc cutter processing, in particular to a method and a device for detecting ultrasonic cutting sharpness of a disc cutter.
Background
The honeycomb composite material is widely applied to the aerospace industry, has obvious advantages and excellent mechanical property and electromagnetic property, but requires high processing requirements. For the processing of honeycomb materials, a special cutter is required, the edge of the circular cutter is provided with a sharp cutting edge with a small wedge angle, and the processing of the materials can be realized. The phenomenon of scraping or sticking scraps can be generated in the high-speed cutting of the disc cutter, the cutting performance is obviously weakened along with the reduction of the sharpness of the cutter, and the processing quality is also reduced along with the reduction of the sharpness of the cutter. If a product with excellent processing quality and stable dimensional accuracy is obtained, the cutting edge of the ultrasonic cutter needs to be sharp enough. The sharpness test of ultrasonic disc knives is therefore extremely important.
The prior testing of the sharpness of the cutter is mainly carried out in the static cutting process without ultrasonic working conditions, while the machining of the disc cutter is complex movement of feeding movement, high-frequency vibration and high-speed rotation, and the cutting mechanism, the failure mode of the cutter and the like have changed greatly compared with the static cutting. According to the theory of continuous elastomer dynamic analysis, cutting force is always statically acted on a workpiece in ultrasonic cutting machining, so that a machined material generates cracks and expands until the cracks are broken under the action of cutting stress, in ultrasonic vibration cutting, the breaking process is not only used for cutting the material statically, but also mainly used for increasing the actual instantaneous cutting speed due to dynamic cutting force which is generated in ultrasonic vibration and is perpendicular to the static force direction, so that the resistance deformation of the periphery of a cutting point is reduced, and acting force is more concentrated on the cutting point, and therefore, the ultrasonic cutting sharpness of a disc cutter under the ultrasonic vibration working condition cannot be truly reflected by the traditional single sharpness testing device and method.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is that the cutter sharpness testing device and the cutter sharpness testing method in the prior art cannot truly reflect the defect of the cutter sharpness in ultrasonic cutting under the ultrasonic vibration working condition, so as to provide a cutter sharpness detecting method.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the ultrasonic cutting sharpness detection method of the disc cutter comprises the following steps:
in the process of cutting a material to be cut by the disc cutter, driving the disc cutter to cut the material to be cut at a constant speed according to a rotation speed n, a feeding speed V, an ultrasonic amplitude Ap and an ultrasonic vibration frequency gamma; recording the small wedge angle cutting edge radius R1 before cutting by the disc cutter and the small wedge angle cutting edge radius R2 after cutting;
in the cutting process, measuring the stress F of the disc cutter in real time; establishing a change curve of Fx-t according to the relation between the stress of the disc cutter in the X-axis direction and the time t, and establishing a change curve of Fy-t according to the relation between the stress of the disc cutter in the Y-axis direction and the time t; establishing a change curve of Fz-t according to the relation between the stress magnitude Fz of the disc cutter in the Z-axis direction and the time t;
dividing the cutting process of the disc cutter into a cutting-in stage, a stable cutting stage and a cutting-out stage according to the change curve of Fx-t, the change curve of Fy-t and the change curve of Fz-t, and respectively calculating the cutting-in work W 1 Stable cutting work W 2 Work W is cut out 3 Work of vibration in vertical direction W 4 ；
Before cutting according to the disc cutterThe small wedge angle cutting edge radius R1, the small wedge angle cutting edge radius R2 after cutting by the disc cutter and the cutting work W 1 Stable cutting work W 2 Work W is cut out 3 Work of vibration in vertical direction W 4 The ultrasonic cutting sharpness of the circular knife is calculated according to the time t of each cutting stage and the cutting length L of each cutting stage, and the calculation formula is as follows:
wherein f is ultrasonic cutting sharpness of the disc cutter, G is fracture toughness of the material to be cut, and t 1 To time from start of cutting to end of plunge phase, t 2 To time from start of cutting to end of stable cutting phase, t 3 For the time from the start of cutting to the end of the cutting-out phase, L 1 To cut length of the incising stage, L 2 To stabilize the cutting length of the cutting stage, L 3 In order to cut the cutting length in the in-out stage, gamma is ultrasonic vibration frequency, and H is Shore hardness of the cut material.
Further, the cutting work W 1 The calculation method of (1) is as follows:
because of
So that the work is cut into
The stable cutting work W 2 The calculation method of (1) is as follows:
the work W cuts out 3 The calculation method of (1) is as follows:
the vertical vibration power W 4 The calculation method of (1) is as follows:
because S is a displacement function along the Z direction, s=ap x Sin (t),
so the vibration work in the vertical direction
Wherein F is the stress of the disc cutter, fx is the stress of the disc cutter in the X-axis direction, and Fy is the stress of the disc cutter in the Y-axis direction; v is the feeding speed of the disc cutter, vx is the feeding speed of the disc cutter in the X-axis direction.
Further, acquiring an image of a cutting process, and acquiring time points of the cutting-in stage, the stable cutting stage and the cutting-out stage, wherein the starting time point of the cutting-in stage is a time point when the disc cutter contacts with a material to be cut, and the ending time point of the cutting-in stage is a time point when the cutting depth of the disc cutter into the material to be cut reaches a preset value; the starting time point of the stable cutting stage is the ending time point of the cutting-in stage, and the ending time point of the stable cutting stage is the time point when the disc cutter starts cutting out from the cut material along the cutting direction; the start time point of the cutting-out stage is the end time point of the stable cutting-out stage, and the end time point of the cutting-out stage is the time point when Fx and Fy decrease to zero.
Further, the rotary speed n of the disc cutter is 800-3000 r/min, the feeding speed V of the disc cutter is 3000-10000mm/min, the ultrasonic amplitude Ap is 20-30 microns, and the ultrasonic vibration frequency gamma is 20-30KHz.
Further, a cutter ultrasonic cutting sharpness detection device adopting the cutter ultrasonic cutting sharpness detection method according to any one of the above claims, the cutter ultrasonic cutting sharpness measurement device comprises a loading table, a cutter moving mechanism installed on the loading table, a cutter clamping mechanism, a material to be cut moving mechanism, a material to be cut clamping mechanism, an industrial camera and a control terminal, the cutter moving mechanism can drive the cutter clamping mechanism to move along the Z-axis direction, the cutter is installed on the cutter clamping mechanism and can drive the cutter to rotate, the cutter clamping mechanism is provided with an ultrasonic generating device, the ultrasonic generating device can drive the cutter to vibrate, the material to be cut moving mechanism can drive the material to be cut to move along the X-axis and the Y-axis direction, the material to be cut clamping mechanism is provided with a dynamometer, the material to be cut clamping mechanism is used for clamping the material to be cut and measures the cutting force of the material to be cut when the cutter is cut by the cutter through the dynamometer, and the industrial camera is used for recording the control terminal and determining the sharpness of the cutter according to the cutting force signal of the cutter.
Further, the disc cutter moving mechanism comprises a lifting driving piece and a lifting screw rod, wherein the lifting driving piece is arranged on the loading table, the lifting screw rod is connected with a driving rod of the lifting driving piece, and the disc cutter clamping mechanism is arranged on the lifting screw rod through a sliding block so as to move along the Z-axis direction of the lifting screw rod.
Further, the disc cutter clamping mechanism comprises a rotating motor connected to the sliding block and an ultrasonic cutter handle connected with a rotating shaft of the rotating motor, the ultrasonic generating device is arranged on the ultrasonic cutter handle, the disc cutter is detachably arranged on the ultrasonic cutter handle, and the rotating motor is suitable for driving the disc cutter to rotate at a high speed.
Further, the motion mechanism of the cut material comprises an X-axis driving rod arranged on the loading table and a Y-axis driving rod movably arranged on the X-axis driving rod, and the Y-axis driving rod is provided with a clamping mechanism of the cut material.
Further, the clamping mechanism for the cut materials comprises a fixed seat arranged on the Y-axis driving rod, a rotating seat rotatably arranged on the fixed seat and a rotary table arranged on the rotating seat, and the dynamometer is arranged on the rotary table.
Further, a Y-axis rotating mechanism which is suitable for driving the rotating seat to rotate around a Y axis is arranged on the fixed seat, and a Z-axis rotating mechanism which is suitable for driving the turntable to rotate around a Z axis is arranged on the rotating seat; the load cell is provided with a clamp adapted to clamp the material.
The technical scheme of the invention has the following advantages:
1. according to the method for detecting the ultrasonic cutting sharpness of the disc cutter, the cutting attenuation coefficient of the cutting edge of the disc cutter is calculated by recording the small wedge angle cutting edge radius before and after the disc cutter cuts a material to be cut, the stress magnitude and stress time change curve of the disc cutter for moving the material to be cut on the X axis and the Y axis is established, the process of cutting the material to be cut by the disc cutter is divided into three stages, and then the ultrasonic cutting sharpness of the disc cutter is calculated according to the work made by the disc cutter in the three stages, the small wedge angle cutting edge radius before and after cutting, the cutting time, the cutting length, the vertical vibration work in the cutting process, the ultrasonic vibration frequency, the hardness and the fracture toughness of the material to be cut, and the accuracy of ultrasonic cutting test of the disc cutter under the ultrasonic vibration working condition is improved, so that the ultrasonic cutting sharpness of the disc cutter under the ultrasonic vibration working condition can be reflected more truly.
2. According to the ultrasonic cutting sharpness detection method for the circular knife, the dynamometer is arranged on the detection device, the material to be cut is placed on the dynamometer, the dynamometer is driven to move to a cutting position by the driving mechanism on the material to be cut moving mechanism, the circular knife is mounted on the circular knife moving mechanism, and the circular knife is driven to move up and down by the lifting driving member on the circular knife moving mechanism so as to cut the material to be cut, so that the dynamic cutting state of the circular knife is ensured.
3. The invention provides a method for detecting ultrasonic cutting sharpness of a disc cutter, wherein a clamping mechanism of a cut material comprises a fixed seat arranged on a Y-axis driving rod, a rotating seat rotatably arranged on the fixed seat and a rotary table arranged on the rotating seat, and a dynamometer is arranged on the rotary table. By the arrangement, the position and the angle of the cut material can be adjusted, so that the cutting test requirement is met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a side view of a device for detecting the sharpness of ultrasonic cutting of a circular knife;
fig. 2 is a perspective view of the device for detecting sharpness of ultrasonic cutting of a circular knife;
FIG. 3 is a perspective view of a clamping mechanism for a material to be cut in accordance with the present invention;
FIG. 4 is a schematic diagram of the connection between a disc cutter holding mechanism and a disc cutter according to the present invention;
FIG. 5 is a graph of pressure time in the X-axis and Y-axis of the method for detecting sharpness of ultrasonic cutting by a circular knife according to the present invention;
FIG. 6 is a graph of Y-axis pressure versus time in the method for detecting sharpness of ultrasonic cutting by a circular knife according to the present invention;
FIG. 7 is a schematic diagram of a force analysis of a load cell according to an embodiment of the present invention;
fig. 8 is a schematic diagram of an ultrasonic cutting process of a disc cutter according to an embodiment of the present invention;
fig. 9 is a schematic diagram of stages of an ultrasonic cutting process with a circular cutter according to an embodiment of the present invention.
Reference numerals illustrate:
1. a loading table; 11. a mounting plate; 2. a cutter movement mechanism; 21. a lifting driving member; 22. lifting the screw rod; 23. a slide bar; 24. a sliding sleeve; 25. a mounting sleeve; 3. a disc cutter clamping mechanism; 31. a rotating motor; 32. an ultrasonic knife handle; 33. a cutter bar; 34. a disc cutter; 35. an ultrasonic generating device; 4. a cut material movement mechanism; 41. an X-axis driving rod; 42. a Y-axis driving rod; 5. a material clamping mechanism to be cut; 51. a fixing seat; 52. a rotating seat; 53. a turntable; 54. a load cell; 55. a clamp; 56. an aluminum plate; 57. a Y-axis rotation mechanism; 58. a Z-axis rotating mechanism; 6. a material.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The ultrasonic cutting sharpness detection method of the circular knife shown in fig. 5-7 comprises the following steps:
in the process of cutting a material to be cut by the disc cutter, driving the disc cutter to cut the material to be cut at a constant speed according to a rotation speed n, a feeding speed V, an ultrasonic amplitude Ap and an ultrasonic vibration frequency gamma; recording the small wedge angle cutting edge radius R1 before cutting by the disc cutter and the small wedge angle cutting edge radius R2 after cutting;
in the cutting process, measuring the stress F of the disc cutter in real time; establishing a change curve of Fx-t according to the relation between the stress of the disc cutter in the X-axis direction and the time t, and establishing a change curve of Fy-t according to the relation between the stress of the disc cutter in the Y-axis direction and the time t; establishing a change curve of Fz-t according to the relation between the stress magnitude Fz of the disc cutter in the Z-axis direction and the time t;
dividing the cutting process of the disc cutter into a cutting-in stage, a stable cutting stage and a cutting-out stage according to the change curve of Fx-t, the change curve of Fy-t and the change curve of Fz-t, and respectively calculating the cutting-in work W 1 Stable cutting work W 2 Work W is cut out 3 Work of vibration in vertical direction W 4 ；
According to the small wedge angle cutting edge radius R1 before cutting by the disc cutter, the small wedge angle cutting edge radius R2 after cutting by the disc cutter and the cutting work W 1 Stable cutting work W 2 Work W is cut out 3 Work of vibration in vertical direction W 4 The ultrasonic cutting sharpness of the circular knife is calculated according to the time t of each cutting stage and the cutting length L of each cutting stage, and the calculation formula is as follows:
wherein f is ultrasonic cutting sharpness of the disc cutter, G is fracture toughness of the material to be cut, and t 1 To time from start of cutting to end of plunge phase, t 2 To time from start of cutting to end of stable cutting phase, t 3 For the time from the start of cutting to the end of the cutting-out phase, L 1 For cutting in the cutting-in phaseCut length, L 2 To stabilize the cutting length of the cutting stage, L 3 In order to cut the cutting length in the in-out stage, gamma is ultrasonic vibration frequency, and H is Shore hardness of the cut material.
According to the method for detecting the ultrasonic cutting sharpness of the disc cutter, the cutting attenuation coefficient of the cutting edge of the disc cutter is calculated by recording the small wedge angle cutting edge radius before and after the disc cutter cuts a material to be cut, the change curve of the stress magnitude and the stress time of the disc cutter for moving the material to be cut on the X axis and the Y axis is established, the process of cutting the material to be cut by the disc cutter is divided into three stages, and then the ultrasonic cutting sharpness of the disc cutter is calculated according to the work made by the disc cutter in the three stages, the small wedge angle cutting edge radius before and after cutting, the cutting time, the cutting length, the vertical vibration work in the cutting process, the ultrasonic vibration frequency, the hardness and the fracture toughness of the material to be cut, so that the accuracy of ultrasonic cutting test of the disc cutter under the ultrasonic vibration working condition is improved, and the ultrasonic cutting sharpness of the disc cutter under the ultrasonic vibration working condition can be reflected more truly.
In the present embodiment, the work W 1 The calculation method of (1) is as follows:
because of
So that the work is cut into
The stable cutting work W 2 The calculation method of (1) is as follows:
the work W cuts out 3 The calculation method of (1) is as follows:
wherein F is the stress of the disc cutter, fx is the stress of the disc cutter in the X-axis direction, and Fy is the stress of the disc cutter in the Y-axis direction; v is the feeding speed of the disc cutter, vx is the feeding speed of the disc cutter in the X-axis direction.
In this embodiment, as shown in fig. 9, an image of a cutting process is acquired, and time points of a cutting-in stage, a stable cutting stage and a cutting-out stage are acquired, wherein a start time point of the cutting-in stage is a time point when the disc cutter contacts a material to be cut (refer to fig. 9 a), and an end time point of the cutting-in stage is a time point when a cutting depth of the disc cutter into the material to be cut reaches a preset value (refer to fig. 9 b); the start time point of the stable cutting stage is the end time point of the cutting-in stage, and the end time point of the stable cutting stage is the time point when the disc cutter starts cutting out from the cut material along the cutting direction (refer to fig. 9 c); the start time point of the cut-out phase is the end time point of the stable cut-out phase, and the end time point of the cut-out phase is the time point when Fx and Fy decrease to zero.
Specifically, the rotary speed n of the disc cutter is 800-3000 rpm, and the feeding speed V of the disc cutter is 3000-10000mm/min.
In this embodiment, specific values of the small wedge angle edge radii before and after the cutting of the material by the disc cutter are all observed by using a super depth of field microscope for recording.
The device for detecting the ultrasonic cutting sharpness of the circular knife by adopting the method for detecting the ultrasonic cutting sharpness of the circular knife according to any one of the above claims comprises a loading table 1, a circular knife moving mechanism 2, a circular knife clamping mechanism 3, a material to be cut moving mechanism 4, a material to be cut clamping mechanism 5, an industrial camera and a control terminal, wherein the circular knife moving mechanism 2 can drive the circular knife clamping mechanism 3 to move along the Z axis direction, the circular knife 34 is arranged on the circular knife clamping mechanism 3 and can drive the circular knife 34 to rotate, the circular knife clamping mechanism 3 is provided with an ultrasonic generating device 35, the ultrasonic generating device 35 can drive the circular knife 34 to vibrate, the material to be cut moving mechanism 4 can drive the material to be cut to move along the X axis and the Y axis direction, the material to be cut clamping mechanism 5 is provided with a force measuring instrument 54, the material to be cut clamping mechanism 5 is used for clamping the material to be cut 6, and the force measuring the material to be cut 6 by the instrument is used for measuring the force measuring the material to be cut by the ultrasonic camera and the industrial camera is connected with the cutting camera and the force measuring instrument 54 according to the image signal of the sharpness of the cutting knife 34. The control terminal may be a computer or other device.
In this embodiment, the cutter disc moving mechanism 2 includes a lift driving member 21 mounted on the loading table 1, and a lift screw 22 connected to a driving rod of the lift driving member 21, and the cutter disc holding mechanism 3 is provided on the lift screw 22 through a slider so as to move in the Z-axis direction along the lift screw 22.
In the present embodiment, the disc holder holding mechanism 3 includes a rotating motor 31 connected to the slider, an ultrasonic blade holder 32 connected to the rotating shaft of the rotating motor 31, and the ultrasonic blade holder 32 is connected to the rotating shaft of the rotating motor 31 through a hydraulic chuck; specifically, an ultrasonic generating device 35 is arranged on the ultrasonic knife handle 32, a knife bar 33 is connected to one end of the ultrasonic knife handle 32 far away from the rotating motor 31, and a disc knife 34 is connected to one end of the knife bar 33 far away from the ultrasonic knife handle 32 through a fastening screw; specifically, the cutter bar 33 is detachably mounted on the mounting hole of the ultrasonic cutter bar 32, and is locked and fixed by screwing a bolt, and the rotating motor 31 is suitable for driving the ultrasonic cutter bar 32 to rotate at a high speed, so as to drive the cutter bar 33 and the disc cutter 34 on the cutter bar 33 to rotate at a high speed.
Specifically, the ultrasonic knife handle 32 can be driven by the ultrasonic generating device 35 to drive the circular knife 34 to vibrate at high frequency in the axial direction, the amplitude Ap of the circular knife is 20-30 microns, and the vibration frequency gamma is 20-30KHz.
In this embodiment, the loading platform 1 is fixed with a mounting plate 11, two sliding rods 23 are fixed on the mounting plate 11, the lifting screw rod 22 is located between the two sliding rods 23, sliding sleeves 24 are sleeved on the two sliding rods 23, a mounting sleeve 25 is fixed on the two sliding sleeves 24, and a rotating motor 31 is fixed in the mounting sleeve 25 through fastening bolts. By this arrangement, the two slide bars 23 can guide the disk blade 34 when the lifting drive member 21 drives the disk blade 34 to lift, and the stability of the disk blade 34 when the lifting movement is performed can be enhanced.
In the present embodiment, the material to be cut moving mechanism 4 includes an X-axis drive lever 41 mounted on the loading table 1 and a Y-axis drive lever 42 movably mounted on the X-axis drive lever 41, and the material to be cut holding mechanism 5 is mounted on the Y-axis drive lever 42.
In the present embodiment, the material clamping mechanism 5 to be cut includes a fixed base 51 mounted on the Y-axis drive lever 42, a rotating base 52 rotatably mounted on the fixed base 51, and a turntable 53 mounted on the rotating base 52, and a load cell 54 is mounted on the turntable 53. By the arrangement, the position of the cut material 6 and the angle of the cut material 6 can be adjusted, so that the cutting test requirement is met. Specifically, the fixed seat 51 is provided with a Y-axis rotation mechanism 57 adapted to drive the rotation seat 52 to rotate around the Y-axis, and the rotation seat 52 is provided with a Z-axis rotation mechanism 58 adapted to drive the turntable 53 to rotate around the Z-axis; the load cell 54 is fixedly provided with a clamp 55 by means of bolts, and the clamp 55 is adapted to clamp the material 6 to be cut. Specifically, the aluminum plate 56 is fixedly installed on the fixture 55 through a bolt, the cut material 6 is fixed on the aluminum plate 56 through hot melt adhesive, and the fixture 55 is adjusted to clamp the cut material 6 so as to further fix the cut material 6, so that the cut material 6 can be effectively prevented from being displaced or separating from the fixture 55 in the cutting process. Specifically, aluminum plate 56 is used to hold one side of material 6 to be cut in a smooth and flat surface.
Specifically, the movement distance of the Y-axis driving rod 42 on the X-axis driving rod 41 is 0-1000mm, and the movement precision is 0-0.1mm; the moving distance of the fixed seat 51 on the Y-axis driving rod 42 is 0-2000mm, and the moving precision is 0-0.1mm.
In the present 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 tailored to the requirements.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the invention.

Claims (10)

1. The ultrasonic cutting sharpness detection method for the circular knife is characterized by comprising the following steps of:
in the process of cutting a material to be cut by the disc cutter, driving the disc cutter to cut the material to be cut at a constant speed according to a rotation speed n, a feeding speed V, an ultrasonic amplitude Ap and an ultrasonic vibration frequency gamma; recording the small wedge angle cutting edge radius R1 before cutting by the disc cutter and the small wedge angle cutting edge radius R2 after cutting;
in the cutting process, measuring the stress F of the disc cutter in real time; establishing a change curve of Fx-t according to the relation between the stress of the disc cutter in the X-axis direction and the time t, and establishing a change curve of Fy-t according to the relation between the stress of the disc cutter in the Y-axis direction and the time t; establishing a change curve of Fz-t according to the relation between the stress magnitude Fz of the disc cutter in the Z-axis direction and the time t;
dividing the cutting process of the disc cutter into a cutting-in stage, a stable cutting stage and a cutting-out stage according to the change curve of Fx-t, the change curve of Fy-t and the change curve of Fz-t, and respectively calculating the cutting-in work W 1 Stable cutting work W 2 Work W is cut out 3 Work of vibration in vertical direction W 4 ；
According to the small wedge angle cutting edge radius R1 before cutting by the disc cutter, the small wedge angle cutting edge radius R2 after cutting by the disc cutter and the cutting work W 1 Stable cutting work W 2 Work W is cut out 3 Work of vibration in vertical direction W 4 The ultrasonic cutting sharpness of the circular knife is calculated according to the time t of each cutting stage and the cutting length L of each cutting stage, and the calculation formula is as follows:
wherein f is ultrasonic cutting sharpness of the disc cutter, G is fracture toughness of the material to be cut, and t 1 To time from start of cutting to end of plunge phase, t 2 To time from start of cutting to end of stable cutting phase, t 3 For the time from the start of cutting to the end of the cutting-out phase, L 1 To cut length of the incising stage, L 2 To stabilize the cutting length of the cutting stage, L 3 In order to cut out the cutting length of the stage, gamma is the ultrasonic vibration frequency, and H is the Shore hardness of the material to be cut.
2. The ultrasonic cutting sharpness detection method of claim 1, wherein the cutting work W 1 The calculation method of (1) is as follows:
so that the work is cut into
The stable cutting work W 2 The calculation method of (1) is as follows:
the work W cuts out 3 The calculation method of (1) is as follows:
the vertical vibration power W 4 The calculation method of (1) is as follows:
wherein F is the stress of the disc cutter, fx is the stress of the disc cutter in the X-axis direction, and Fy is the stress of the disc cutter in the Y-axis direction; v is the feeding speed of the disc cutter, vx is the feeding speed of the disc cutter in the X-axis direction.
3. The ultrasonic cutting sharpness detection method of the circular knife according to claim 1, wherein an image of a cutting process is acquired, time points of the cutting-in stage, the stable cutting stage and the cutting-out stage are acquired, a starting time point of the cutting-in stage is a time point when the circular knife is in contact with a material to be cut, and an ending time point of the cutting-in stage is a time point when a cutting depth of the circular knife into the material to be cut reaches a preset value; the starting time point of the stable cutting stage is the ending time point of the cutting-in stage, and the ending time point of the stable cutting stage is the time point when the disc cutter starts cutting out from the cut material along the cutting direction; the start time point of the cutting-out stage is the end time point of the stable cutting-out stage, and the end time point of the cutting-out stage is the time point when Fx and Fy decrease to zero.
4. The ultrasonic cutting sharpness detection method of the disc cutter according to claim 1, wherein the rotation speed n of the disc cutter is 800-3000 rpm, the feeding speed V of the disc cutter is 3000-10000mm/min, the ultrasonic amplitude Ap is 20-30 micrometers, and the ultrasonic vibration frequency γ is 20-30KHz.
5. A cutting sharpness detection device for ultrasonic cutting by using the method for detecting sharpness of a cutter disc according to any one of claims 1 to 4, characterized in that the cutting sharpness detection device for ultrasonic cutting by a cutter disc comprises a loading table (1) and a cutter disc moving mechanism (2) mounted on the loading table, a cutter disc holding mechanism (3), a material to be cut moving mechanism (4), a material to be cut holding mechanism (5), an industrial camera and a control terminal, the cutter disc moving mechanism (2) can drive the cutter disc holding mechanism (3) to move along the Z-axis direction, the cutter disc holding mechanism (3) is provided with a cutter disc (34) and can drive the cutter disc (34) to rotate, the cutter disc holding mechanism (3) is provided with an ultrasonic generating device (35), the ultrasonic generating device (35) can drive the cutter disc (34) to vibrate, the material to be cut moving mechanism (4) can drive the material to be cut holding mechanism (5) to move along the X-axis and Y-axis directions, the material to be cut holding mechanism (5) is provided with a cutter disc holding mechanism (54) and a force sensor (54) is used for measuring the cutting force of the material to be cut by the cutter disc (6) when the cutter disc (54) is used for measuring the cutting process, the control terminal is in signal connection with the force gauge (54) and the industrial camera and is used for determining the ultrasonic cutting sharpness of the disc cutter (34) according to the cutting force.
6. The ultrasonic cutting sharpness detection apparatus according to claim 5, wherein the cutter movement mechanism (2) includes the lift driving member (21) mounted on the loading table (1), a lift screw (22) connected to a driving rod of the lift driving member (21), and the cutter clamping mechanism (3) is provided on the lift screw (22) through a slider to perform Z-axis movement along the lift screw (22).
7. The ultrasonic cutting sharpness detection device for a disc cutter according to claim 6, wherein the disc cutter clamping mechanism (3) comprises a rotating motor (31) connected to the sliding block, an ultrasonic cutter handle (32) connected to a rotating shaft of the rotating motor (31), the ultrasonic cutter handle (32) is provided with the ultrasonic generating device (35), the disc cutter (34) is detachably mounted on the ultrasonic cutter handle (32), and the rotating motor (31) is suitable for driving the disc cutter (34) to rotate at a high speed.
8. The ultrasonic cutting sharpness detection apparatus according to claim 5, wherein the material to be cut moving mechanism (4) includes an X-axis driving lever (41) mounted on the loading table (1) and a Y-axis driving lever (42) movably mounted on the X-axis driving lever (41), and the material to be cut holding mechanism (5) is mounted on the Y-axis driving lever (42).
9. The ultrasonic cutting sharpness detection apparatus according to claim 8, characterized in that the material clamping mechanism (5) to be cut includes a fixed seat (51) mounted on the Y-axis driving lever (42), a rotating seat (52) rotatably mounted on the fixed seat (51), and a turntable (53) mounted on the rotating seat (52), the load cell (54) being mounted on the turntable (53).
10. The ultrasonic cutting sharpness detection device of the circular knife according to claim 9, characterized in that a Y-axis rotating mechanism (57) adapted to drive the rotating base (52) to rotate around a Y-axis is arranged on the fixed base (51), and a Z-axis rotating mechanism (58) adapted to drive the turntable (53) to rotate around a Z-axis is arranged on the rotating base (52); the load cell (54) is provided with a clamp (55), the clamp (55) being adapted to clamp the material (6) to be cut.
CN202310796378.6A 2023-06-30 2023-06-30 Ultrasonic cutting sharpness detection method and device for circular cutter Pending CN116698654A (en)

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CN202310796378.6A CN116698654A (en) 2023-06-30 2023-06-30 Ultrasonic cutting sharpness detection method and device for circular cutter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310796378.6A CN116698654A (en) 2023-06-30 2023-06-30 Ultrasonic cutting sharpness detection method and device for circular cutter

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