A special-shaped flexible material cutting device with anti-shake function based on light reflection detection

Abstract

The present invention relates to a non - circular flexible material cutting device based on optical reflection detection, which solves the problems of low cutting accuracy and low cutting quality caused by the non - periodic random impacts such as the deflection of the cutting tool around the X, Y, and Z axes and the displacement along the tool axis when cutting non - circular flexible materials. It includes a frame, a stepping movement mechanism, a rotary cutting mechanism, a tool holder, a tool axis, a blade, a voice coil motor, a four - quadrant photodetector, a laser diode, an upper permanent magnet, a lower permanent magnet, an upper stacked piezoelectric ceramic, a side stacked piezoelectric ceramic, a fixed outer magnetic ring, a fixed inner magnetic ring, a compression spring, a driving plate, and a controller. The laser diode emits laser light to the blade, and after reflection, it is detected by the four - quadrant photodetector, so as to identify the deflection and displacement of the blade in each direction. After being converted by the controller, control signals in each direction are respectively output to control the voice coil motor to provide an axial reverse displacement amount, and control the upper stacked piezoelectric ceramic and the side stacked piezoelectric ceramic to provide a reverse deflection amount.

Description

Technical Field

[0001] The present invention relates to a cutting device for anti-shake special-shaped flexible materials based on light reflection detection. Background Art

[0002] Special-shaped flexible materials refer to flexible materials with uneven thickness, toughness, hardness, etc. at various parts, such as animal furs, embossed wallpapers, etc. Materials with different toughness and hardness have different forms of acting forces on the cutting tool during the cutting operation. Especially when cutting uneven materials, the cutting tool will be subjected to non-periodic random impacts. The directions of the impacts include the deflection of the cutting tool around the X, Y, and Z axes and the displacement along the tool axis, etc., resulting in burrs or other defects in the cut, which will greatly affect the cutting quality for efficient cutting operations. Summary of the Invention

[0003] The purpose of the present invention is to provide a cutting device for anti-shake special-shaped flexible materials based on light reflection detection, so as to solve the technical problems that the cutting tool is prone to non-periodic random impacts such as deflection around the X, Y, and Z axes and displacement along the tool axis when cutting special-shaped flexible materials by the existing cutting device, resulting in low cutting accuracy and low cutting quality.

[0004] The technical solution of the present invention is as follows:

[0005] The cutting device for anti-shake special-shaped flexible materials based on light reflection detection includes:

[0006] A rotary knife mechanism, including a bracket and a connecting shaft rotatably assembled on the bracket. The axis of the connecting shaft is vertically arranged. A regulating box is fixed to the lower part of the connecting shaft. The regulating box has a rectangular installation cavity. A rotary knife driving mechanism for driving the connecting shaft to rotate around its axis is also installed on the bracket;

[0007] A stepping movement mechanism for driving the rotary knife mechanism to move in three mutually perpendicular directions of X, Y, and Z;

[0008] A tool holder, including a rectangular block arranged in the installation cavity and a U-shaped frame arranged at the lower part of the rectangular block. The upper surface of the rectangular block and the top wall of the installation cavity are connected by four evenly distributed upper stacked piezoelectric ceramics. An upper permanent magnet is arranged on the lower surface of the rectangular block. A lower permanent magnet corresponding to the upper permanent magnet is arranged on the bottom wall of the installation cavity. The opposite sides of the upper and lower permanent magnets have opposite polarities to provide repulsive forces to each other. The U-shaped frame includes two side plates arranged in parallel at intervals. Installation through holes are respectively arranged on the two side plates of the U-shaped frame. The two installation through holes are coaxially arranged. A fixed outer magnetic ring is installed in the installation through holes. Compression springs are respectively arranged between the two side surfaces of the rectangular block parallel to the side plates and the corresponding side walls of the installation cavity. Two symmetrically distributed side stacked piezoelectric ceramics are respectively arranged between the other two side surfaces of the rectangular block and the corresponding side walls of the installation cavity;

[0009] A knife shaft, a blade is installed in the middle, the knife shaft is inserted into the installation through hole and the drive hole, and a fixed inner magnetic ring is sleeved on the knife shaft in one-to-one correspondence with the fixed outer magnetic ring, and the fixed inner magnetic ring and the fixed outer magnetic ring are arranged with opposite polarities to repel each other;

[0010] A tool driving device, used for driving the tool shaft to rotate;

[0011] The voice coil motor comprises a cylindrical motor drive block and a cylindrical voice coil mover driven by the motor drive block, wherein the motor drive block is sleeved outside the voice coil mover and fixed relative to a side plate of the U-shaped frame, and the voice coil mover is sleeved and fixed on the blade shaft;

[0012] A laser diode, used to emit laser light to the blade, is mounted on a side plate of one side of the U-shaped frame;

[0013] A four-quadrant photoelectric detector, used to receive the laser reflected from the blade to feedback the deflection and displacement of the blade, is installed above the laser diode and fixed to the side plate where the laser diode is installed;

[0014] The controller is used to control the voice coil motor to provide reverse displacement and the upper stacked piezoelectric ceramics and the side stacked piezoelectric ceramics to provide reverse deflection according to the blade axial displacement signal and deflection signal fed back by the four-quadrant photoelectric detector.

[0015] Furthermore, the tool drive device includes a drive plate respectively attached to the outside of the two side plates, and the two drive plates are respectively provided with drive holes, the two drive holes are coaxially arranged with the mounting through hole, and a plurality of drive electromagnets are evenly distributed on the inner circumference of the drive hole; a mover magnet is arranged on the knife shaft in correspondence with each drive electromagnet in the two drive holes, and the drive electromagnet drives the mover magnet to rotate after being energized. When in use, each drive electromagnet on the drive plate is started, thereby generating magnetic force to couple with each mover magnet on the knife shaft, thereby driving the knife shaft to rotate along its axis, and driving the blade to rotate to cut the material. When the knife shaft deviates from the center position due to non-periodic impact, since its driving mode is driven by the drive electromagnet, even if it deviates from the center position, it is still driven by the drive electromagnet, which ensures the relative stability of the drive, that is, it can still be effectively driven in the case of large impact, large deformation, and axis deviation.

[0016] Furthermore, the driving hole is a hexagonal hole, and a driving electromagnet is respectively arranged on the six sides of the driving hole. The cross-sections of the two sections on the knife shaft corresponding to the two driving holes are hexagonal, and a movable magnet is respectively arranged on the six sides of the hexagon.

[0017] Furthermore, the rotary cutter driving mechanism comprises a driving motor, a driving synchronous pulley, a synchronous belt and a driven synchronous pulley which are sequentially connected in transmission, and the driven synchronous pulley is fixed on the connecting shaft.

[0018] Furthermore, the stepping movement mechanism includes a synchronous belt transmission mechanism that can move along the X direction and a screw transmission mechanism that can move along the Y and Z directions respectively.

[0019] The beneficial effects of the present invention are as follows: when the anti-shake special-shaped flexible material cutting device based on light reflection detection is used, the tool driving device is started to drive the tool shaft to rotate around its axis, and the blade is driven to rotate to cut the material. When the blade produces non-periodic impact due to the different toughness, strength, hardness, density, etc. of the cut material, it is manifested as the deflection of the blade around the X, Y, and Z axes, the displacement along the Y direction, and the radial jump of the blade along the tool shaft. The radial jump of the tool shaft gradually disappears by offsetting the repulsive force between the fixed outer magnetic ring and the fixed inner magnetic ring. Moreover, the greater the impact, the greater the repulsive force between the inner and outer magnetic rings, thereby achieving the purpose of adaptive anti-impact load and ensuring the impact resistance of the blade. The laser emitted by the laser diode is reflected after being irradiated on the blade and enters the detection area of ​​the four-quadrant photoelectric detector. After calculation by the controller, the specific deflection direction and deflection amount of the blade and the specific Y displacement amount are given. Because it is real-time detection, a series of continuous data is fed back to the controller. The controller converts it into the frequency domain through Fourier transform and analyzes its frequency, amplitude, and phase. After processing, a series of continuous control commands are also generated and transmitted to the voice coil motor and the upper stacked piezoelectric ceramics and the side stacked piezoelectric ceramics in real time. The motor drive block of the voice coil motor drives the voice coil mover to move in the opposite direction of the knife shaft in real time. The voice coil mover is fixed to the knife shaft to offset the jitter of the knife shaft, thereby actively eliminating the axial jitter of the tool. The upper stacked piezoelectric ceramics and the side stacked piezoelectric ceramics are a type of transducer that can convert electrical signals into mechanical displacements, and their conversion is accurate, real-time, and extremely high in speed. Stacked piezoelectric ceramics are also called laminated micro-displacement piezoelectric ceramics. Piezoelectric ceramic micro-motion device is formed by stacking multiple piezoelectric ceramic sheets together. If one sheet can displace 1nm, the displacement of multiple sheets after stacking can meet the use requirements. It is a commonly used micro-displacement device. Through the telescopic cooperation between the four upper stacked piezoelectric ceramics arranged on the upper surface of the rectangular block, the deflection of the tool around the X-axis and Y-axis can be compensated, that is, the deflection of the blade around the X-axis and Y-axis directions can be offset; through the side stacked piezoelectric ceramics arranged on the two opposite sides of the rectangular block, the deflection of the tool around the Z-axis can be compensated.

[0020] It can be seen that the solution of the present invention can effectively compensate for the directional deflection and jitter of the tool during cutting, can significantly improve the processing accuracy of the cutting equipment, avoid burrs and other common defects at the cutting point, and improve the quality of the cut material. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1It is a schematic diagram of the overall structure of a specific embodiment of a trimming device for anti-shake special-shaped flexible materials based on optical reflection detection according to the present invention;

[0022] Figure 2 It is a three-dimensional structure diagram of the rotary knife mechanism and other components installed thereon;

[0023] Figure 3 For Figure 2 front view;

[0024] Figure 4 For Figure 2 right view;

[0025] Figure 5 For Figure 3 sectional view taken along line A-A in

[0026] Figure 6 For Figure 4 sectional view taken along line B-B in

[0027] In the figure: 1 - frame, 2 - stepping movement mechanism, 21 - X-direction synchronous belt drive mechanism, 22 - Y-direction lead screw drive mechanism, 23 - Z-direction lead screw drive mechanism, 231 - output slider (i.e., output end); 3 - rotary knife mechanism, 31 - bracket, 32 - connecting shaft, 33 - drive motor, 34 - driving synchronous pulley, 35 - synchronous belt, 36 - driven synchronous pulley, 37 - adjustment box, 4 - tool holder, 41 - rectangular block, 42 - U-shaped frame, 421 - side plate, 5 - blade, 6 - voice coil motor, 61 - motor drive block, 62 - voice coil mover, 7 - special-shaped flexible material to be cut, 8 - flexible cutting panel, 9 - quadrant photodetector, 10 - drive board, 30 - drive electromagnet, 40 - mover magnet, 50 - tool shaft, 60 - fixed outer magnetic ring, 70 - fixed inner magnetic ring, 80 - upper stacked piezoelectric ceramics, 90 - side stacked piezoelectric ceramics, 100 - compression spring, 110 - laser diode, 111 - detection laser, 120 - upper permanent magnet, 130 - lower permanent magnet. Specific Embodiment

[0028] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Usually, the components of the embodiments of the present invention described and shown in the accompanying drawings herein can be arranged and designed in various different configurations.

[0029] Accordingly, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0030] It should be noted that relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0031] The features and performance of the present invention will be further described in detail below in conjunction with embodiments.

[0032] An embodiment of a jitter-proof special-shaped flexible material cutting device based on optical reflection detection of the present invention: As Figures 1-6 shown, the jitter-proof special-shaped flexible material cutting device based on optical reflection detection includes a frame 1, a stepping movement mechanism 2, a rotary knife mechanism 3, a tool holder 4, a tool shaft 50, a blade 5, a voice coil motor 6, a quadrant photodetector 9, a laser diode 110, an upper permanent magnet 120, a lower permanent magnet 130, an upper stacked piezoelectric ceramic 80, a side stacked piezoelectric ceramic 90, a fixed outer magnetic ring 60, a fixed inner magnetic ring 70, a compression spring 100, a driving plate 10, a controller, etc.

[0033] The frame 1 is a rectangular frame structure. The stepping movement mechanism 2 is installed on the frame 1 and includes an output end that can move in three mutually perpendicular directions of X, Y, and Z; the rotary knife mechanism 3 is suspended on the output end and includes a bracket 31 and a connecting shaft 32 rotatably assembled on the bracket 31. The axis of the connecting shaft 32 is vertically arranged, and a rotary knife driving mechanism for driving the connecting shaft 32 to rotate around its axis is also installed on the bracket 31.

[0034] The knife rotating mechanism 3 includes a bracket 31 and a connecting shaft 32 rotatably mounted on the bracket 31. The axis of the connecting shaft 32 is vertically arranged. An adjusting box 37 is fixed to the lower part of the connecting shaft 32. One side of the adjusting box 37 is open and provided with a detachable end cover. The adjusting box 37 has a rectangular installation cavity inside. The lower part of the installation cavity is provided with an opening for the knife holder 4 to pass freely. The bracket 31 is also provided with a knife rotating drive mechanism that drives the connecting shaft 32 to rotate around its axis. The knife rotating drive mechanism includes a driving motor 33, a driving synchronous pulley 34, a synchronous belt 35 and a driven synchronous pulley 36 that are sequentially connected in transmission. The driven synchronous pulley 36 is fixed to the connecting shaft 32.

[0035] The stepping mechanism 2 is used to drive the rotary knife mechanism 3 to move in three mutually perpendicular directions of X, Y and Z. The stepping mechanism 2 includes a synchronous belt transmission mechanism that can move in the X direction and a screw transmission mechanism that can move in the Y and Z directions respectively.

[0036] The tool holder 4 includes a rectangular block 41 arranged in the installation cavity and a U-shaped frame 42 arranged at the lower part of the rectangular block 41. The upper surface of the rectangular block 41 is connected to the top wall of the installation cavity by four evenly distributed upper stacked piezoelectric ceramics 80. An upper permanent magnet 120 is arranged on the lower surface of the rectangular block 41. A lower permanent magnet 130 corresponding to the upper permanent magnet 120 is arranged on the bottom wall of the installation cavity. The polarities of the opposite sides of the upper and lower permanent magnets are opposite to each other to provide a repulsive force to each other. The U-shaped frame 42 includes two side plates 421 arranged in parallel at an interval. The two side plates 421 of the U-shaped frame 42 are respectively provided with mounting through holes. The two mounting through holes are coaxially arranged. A fixed external magnetic ring 60 is installed in the mounting through hole. Compression springs 100 are respectively arranged between the two side surfaces of the rectangular block 41 parallel to the side plates 421 and the corresponding side walls on the installation cavity. Two symmetrically distributed side stacked piezoelectric ceramics 90 are respectively arranged between the other two side surfaces of the rectangular block 41 and the corresponding side walls on the installation cavity.

[0037] A blade 5 is installed in the middle of the knife shaft 50, and the knife shaft 50 is inserted into the installation through hole and the driving hole. A fixed inner magnetic ring 70 is sleeved on the knife shaft 50 corresponding to the fixed outer magnetic ring 60 one by one. The fixed inner magnetic ring 70 and the fixed outer magnetic ring 60 are arranged with opposite polarities to repel each other.

[0038] The tool driving device is used to drive the tool shaft 50 to rotate; the tool driving device includes driving plates 10 respectively attached to the outer surfaces of two side plates 421. Driving holes are respectively provided on the two driving plates 10, and the two driving holes are coaxially arranged with the mounting through holes. A plurality of driving electromagnets 30 are evenly distributed on the inner circumferential surface of the driving holes; on the tool shaft 50, a moving magnet 40 is provided corresponding to each driving electromagnet 30 in the two driving holes. After the driving electromagnet 30 is energized, it drives the moving magnet 40 to rotate. During use, each driving electromagnet 30 on the driving plate 10 is started, so as to generate a magnetic force to couple with each moving magnet 40 on the tool shaft 50, and then drive the tool shaft 50 to rotate along its axis, driving the blade 5 to rotate to cut the material. When the tool shaft 50 deviates from the central position due to non-periodic impact, since its driving mode is driven by the driving electromagnet 30, even if it deviates from the central position, it is still driven by the driving electromagnet 30, ensuring the relative stability of the driving, that is, effective driving can still be carried out under the conditions of large impact, large deformation and deviation of the axis. The driving hole is a hexagonal hole, and one of the driving electromagnets 30 is respectively provided on the six side surfaces of the driving hole. The cross sections of two sections of the tool shaft 50 corresponding to the two driving holes are hexagonal, and one of the moving magnets 40 is respectively provided on the six side surfaces of the hexagon.

[0039] The voice coil motor 6 includes a cylindrical motor driving block 61 and a cylindrical voice coil mover 62 driven by the motor driving block 61. The motor driving block 61 is sleeved outside the voice coil mover 62 and fixed relative to one side plate 421 of the U-shaped frame 42. The voice coil mover 62 is sleeved and fixed on the tool shaft 50.

[0040] The laser diode 110 is used to emit a laser 111 to the blade 5 and is installed on one side plate 421 of the U-shaped frame 42.

[0041] The quadrant photodetector 9 is used to receive the laser reflected from the blade 5 to feedback the deflection and displacement of the blade 5, and is installed above the laser diode 110 and fixed on the side plate 421 where the laser diode 110 is installed.

[0042] The controller is used to respectively control the voice coil motor 6 to provide a reverse displacement amount according to the axial displacement signal and deflection signal of the blade 5 fed back by the quadrant photodetector 9, and control the upper stacked piezoelectric ceramic 80 and the side stacked piezoelectric ceramic 90 to provide a reverse deflection amount.

[0043] When the anti-shake special-shaped flexible material cutting device based on light reflection detection of the present invention is used, the tool driving device is started to drive the knife shaft 50 to rotate around its axis, and the blade 5 is driven to rotate to cut the material. When the cut material has different toughness, strength, hardness, density, etc. at different places, the blade 5 produces non-periodic impact, which is manifested as the deflection of the blade 5 around the X, Y, and Z axes, the displacement along the Y direction, and the radial jump of the blade 5 along the knife shaft 50. The radial jump of the knife shaft 50 gradually disappears by the offset of the repulsive force between the fixed outer magnetic ring 60 and the fixed inner magnetic ring 70, and the affected The greater the impact, the greater the repulsive force between the inner and outer magnetic rings, thereby achieving the purpose of adaptive anti-impact load and ensuring the impact resistance of the blade 5; and the laser emitted by the laser diode 110 is reflected after irradiating the blade 5 and enters the detection area of ​​the four-quadrant photoelectric detector 9. After calculation by the controller, the specific deflection direction and deflection amount of the blade 5 and the specific Y-direction displacement are given. Because it is real-time detection, a series of continuous data is fed back to the controller, which is converted into the frequency domain by Fourier transform and its frequency, amplitude, and phase are analyzed. After being processed by the controller, a series of continuous data is also given. The control command is transmitted to the voice coil motor 6 and the upper stacked piezoelectric ceramic 80 and the side stacked piezoelectric ceramic 90 in real time. The motor driving block 61 of the voice coil motor 6 drives the voice coil mover 62 to move in the opposite action to the knife shaft 50 in real time. The voice coil mover 62 is fixed together with the knife shaft 50 to offset the jitter of the knife shaft 50, thereby actively eliminating the axial jitter of the tool; the upper stacked piezoelectric ceramic 80 and the side stacked piezoelectric ceramic 90 are a kind of transducer that can convert electrical signals into mechanical displacement, and the conversion is accurate, real-time and extremely high in conversion rate. Stacked piezoelectric ceramics are also called laminated micro-displacement piezoelectric ceramics. The piezoelectric ceramic or multi-layer stacked piezoelectric ceramic micro-motion device is formed by stacking multiple piezoelectric ceramic sheets together. If one sheet can displace 1nm, the displacement of multiple sheets after stacking can meet the use requirements. It is a commonly used micro-displacement device. Through the telescopic cooperation between the four upper stacked piezoelectric ceramics 80 arranged on the upper surface of the rectangular block 41, the deflection of the tool around the X-axis and Y-axis can be compensated, that is, the deflection of the blade 5 around the X-axis and Y-axis directions can be offset; through the side stacked piezoelectric ceramics 90 arranged on the two opposite sides of the rectangular block 41, the deflection of the tool around the Z-axis can be compensated. The scheme of the present invention can effectively compensate for the deflection and jitter of the tool in all directions during cutting, can significantly improve the processing accuracy of the cutting equipment, avoid burrs and other common defects at the cutting point, and improve the quality of the cut material.

[0044] One end of the long arm-shaped bracket 31 is fixed on the output slider 231 of the Z-axis screw transmission mechanism, and a driving motor 33 is fixed in the fixing hole near the fixed end, and its shaft is fixedly connected to the driving synchronous pulley 34, and is connected to the driven synchronous pulley 36 fixed to the outer end of the bracket 31 through a synchronous belt to transmit power.

[0045] The driven synchronous pulley 36 is fixedly connected to the connecting shaft 32 and coaxially connected to the through hole at the distal end of the bracket 31. The end face at the lower end of the connecting shaft 32 is fixed at the center of the upper part of the rectangular tool holder 4.

[0046] On the lower part of the tool holder 4, there are symmetrically distributed side plates 421 on both sides, and through holes are coaxially provided in the Y direction, in which a fixed outer magnetic ring 60 is fixed. A fixed inner magnetic ring 70 is fixedly installed at the center of the fixed outer magnetic rings 60 on both sides, and its polarity is opposite to that of the fixed outer magnetic ring 60. Moreover, the fixed inner magnetic ring 70 is fixed on the tool shaft 50, and a blade 5 is fixed at the center of the tool shaft 50. Therefore, the blade 5 and the fixed inner magnetic ring 70 are fixedly connected through the tool shaft 50, and its radial non-contact positioning is realized through the fixed outer magnetic ring 60, showing a non-linear load in the radial load bearing. That is, the greater the impact on the blade 5, the stronger the dynamic bearing capacity and the greater the movement resistance of the blade 5, ensuring the radial impact resistance.

[0047] Both ends of the cylindrical tool shaft 50 are hexagonal structures, and a circle of 6 mover magnets 40 are fixedly installed in a circumferential array on each side surface, which correspond one by one to the drive electromagnets 30 on the hexagonal surfaces fixedly installed in the corresponding hexagonal slots of the drive plate 10. When an alternating current is applied, the drive electromagnet 30 fixed on the drive plate 10 drives the tool shaft 50 to realize non-contact rotational motion, and a certain redundancy of the center deviation of the motion axis is left, ensuring effective drive even under the conditions of large impact, large deformation and axis deviation. The drive plate 10 is fixedly connected to the U-shaped frame 42.

[0048] At the symmetric inner ends of the symmetrically distributed side plates 421 on the lower part of the tool holder 4, a cylindrical motor drive block 61 is fixedly installed. The cylindrical motor drive block 61 is coaxially installed and fixed with the through holes of the symmetrically distributed side plates 421 on the lower part of the tool holder 4; a cylindrical voice coil mover 62 is fixedly installed on the tool shaft 50 and has a coaxial clearance fit with the motor drive block 61. By driving the drive block of the drive motor 33, the voice coil mover 62 drives the tool shaft 50 and the blade 5 to realize axial high-frequency micro-displacement.

[0049] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention is subject to the claims. All equivalent structural changes made by using the description and drawings of the present invention should be included in the protection scope of the present invention by the same token.

Claims

1. An anti-shake special-shaped flexible material cutting device based on optical reflection detection, characterized in that, include: The rotary cutter mechanism comprises a bracket and a connecting shaft rotatably mounted on the bracket, the axis of the connecting shaft is vertically arranged, an adjusting box is fixed to the lower part of the connecting shaft, and a rectangular mounting cavity is provided in the adjusting box. The bracket is also provided with a rotary cutter driving mechanism for driving the connecting shaft to rotate around its axis; The stepping moving mechanism is used to drive the rotary knife mechanism to move in three mutually perpendicular directions of X, Y and Z; A tool holder, comprising a rectangular block arranged in a mounting cavity and a U-shaped frame arranged at the lower part of the rectangular block, wherein the upper surface of the rectangular block is connected to the top wall of the mounting cavity by four evenly distributed upper stacked piezoelectric ceramics, an upper permanent magnet is arranged on the lower surface of the rectangular block, a lower permanent magnet corresponding to the upper permanent magnet is arranged on the bottom wall of the mounting cavity, the upper and lower permanent magnets have opposite polarities on opposite sides to provide mutually repelling forces, the U-shaped frame comprises two side plates arranged in parallel at intervals, mounting through holes are respectively arranged on the two side plates of the U-shaped frame, the two mounting through holes are coaxially arranged, a fixed external magnetic ring is installed in the mounting through hole, compression springs are respectively arranged between two side surfaces of the rectangular block parallel to the side plates and the corresponding side walls of the mounting cavity, and two symmetrically distributed side stacked piezoelectric ceramics are respectively arranged between the other two side surfaces of the rectangular block and the corresponding side walls of the mounting cavity; A knife shaft, a blade is installed in the middle, the knife shaft is inserted into the installation through hole and the drive hole, and a fixed inner magnetic ring is sleeved on the knife shaft in one-to-one correspondence with the fixed outer magnetic ring, and the fixed inner magnetic ring and the fixed outer magnetic ring are arranged with opposite polarities to repel each other; A tool driving device, used for driving the tool shaft to rotate; The voice coil motor comprises a cylindrical motor drive block and a cylindrical voice coil mover driven by the motor drive block, wherein the motor drive block is sleeved outside the voice coil mover and fixed relative to a side plate of the U-shaped frame, and the voice coil mover is sleeved and fixed on the blade shaft; A laser diode, used to emit laser light to the blade, is mounted on a side plate of one side of the U-shaped frame; A four-quadrant photoelectric detector, used to receive the laser reflected from the blade to feedback the deflection and displacement of the blade, is installed above the laser diode and fixed to the side plate where the laser diode is installed; The controller is used to control the voice coil motor to provide reverse displacement and the upper stacked piezoelectric ceramics and the side stacked piezoelectric ceramics to provide reverse deflection according to the blade axial displacement signal and deflection signal fed back by the four-quadrant photoelectric detector.

2. The anti-shake special-shaped flexible material cutting device based on optical reflection detection according to claim 1, wherein The tool driving device includes driving plates respectively attached to the outside of two side plates, and driving holes are respectively arranged on the two driving plates. The two driving holes are coaxially arranged with the mounting through hole, and a plurality of driving electromagnets are evenly distributed on the inner circumference of the driving holes; a movable magnet is arranged on the tool shaft corresponding to each driving electromagnet in the two driving holes, and the movable magnet is driven to rotate when the driving electromagnet is energized.

3. The anti-shake special-shaped flexible material cutting device based on optical reflection detection according to claim 2, wherein The driving hole is a hexagonal hole, and a driving electromagnet is respectively arranged on the six sides of the driving hole. The cross-sections of the two sections on the knife shaft corresponding to the two driving holes are hexagonal, and a mover magnet is respectively arranged on the six sides of the hexagon.

4. The anti-shake special-shaped flexible material cutting device based on optical reflection detection according to claim 1, wherein The rotary cutter driving mechanism comprises a driving motor, a driving synchronous belt wheel, a synchronous belt and a driven synchronous belt wheel which are sequentially connected in transmission, and the driven synchronous belt wheel is fixed on the connecting shaft.

5. The anti-shake special-shaped flexible material cutting device based on optical reflection detection according to claim 1, characterized in that, The stepping movement mechanism includes a synchronous belt drive mechanism that can move along the X direction and lead screw drive mechanisms that can move along the Y and Z directions respectively.

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