JP2021171858A - Cutting method for sheet material and cutting device for sheet material - Google Patents

Abstract

To provide a cutting method for sheet material and a cutting device for sheet material that can securely cut a sheet material and suppress burring, shear-drooping, tearing flaws, etc.SOLUTION: A cutting device for sheet material has: an ultrasonic vibration body; an ultrasonic vibration part which places the ultrasonic vibration body in ultrasonic vibrations; an anvil on which a sheet material is mounted; a cutting part which cuts the sheet material with a cutting blade; a retaining part which retains the ultrasonic vibration body and sheet material in a non-contact state with surfaces thereof opposed to each other at a constant interval; and a control part. The control part uses the retaining part to retain the surface of the sheet material mounted on the anvil and the surface of the ultrasonic vibration body in the non-contact state at the constant interval, and places the ultrasonic vibration body in ultrasonic vibrations by the ultrasonic vibration part to vibrate the sheet material through the ultrasonic vibrations of the ultrasonic vibration body, and then cut the sheet material by the cutting part when the sheet material is vibrating.SELECTED DRAWING: Figure 3

Description

The present invention relates to a method for cutting a sheet material and a device for cutting the sheet material. And the sheet material cutting device.

As a conventional method for cutting a sheet material, when the sheet material is landed on the sheet receiving surface and then the cutting blade is pressed against the sheet material for cutting, as shown in FIG. 12, the sheet material is applied to at least one of the sheet receiving surface 100a and the cutting blade 40. , A method of cutting the sheet material S into the shape of the cutting blade 40 by pressing the sheet material S from the cutting blade 40 side while applying fine vibration such as ultrasonic vibration along the perpendicular direction or the axial direction is known. rice field.

Here, at least one of the sheet receiving surface 100a and the cutting blade 40 is subjected to ultrasonic oscillation at the same time as the start of cutting or before cutting by interlocking the timing of ultrasonic oscillation by the ultrasonic vibration means with the cutting operation of the sheet material. The ultrasonic oscillation was terminated at the same time as or after the cutting (see, for example, Patent Document 1).

In this method, at least one of the sheet receiving surface 100a and the cutting blade 40 is vibrated finely by ultrasonic vibration or the like along the perpendicular direction or the axial direction, so that the tip of the cutting blade 40 can easily enter the sheet material S. As a result, the sheet material S could be reliably cut, and the occurrence of burrs, sagging, tears, etc. could be suppressed.

Japanese Unexamined Patent Publication No. 8-132396

However, even if the sheet material cutting device does not have or does not have the ultrasonic vibrating means on at least one of the sheet receiving surface 100a and the cutting blade 40, the sheet is to the same extent as when the ultrasonic vibrating means is provided. There was a demand for surely cutting the material and suppressing the occurrence of burrs, drips, tears, etc., and a new cutting method for the sheet material was required.

In the present invention, even when neither the sheet receiving surface nor the cutting blade can be ultrasonically vibrated, the sheet material can be subjected to ultrasonic vibration as in the case where either the sheet receiving surface or the cutting blade is ultrasonically vibrated. An object of the present invention is to provide a sheet material cutting method and device that reliably cuts and suppresses the occurrence of burrs, drips, tears, and the like.

In order to solve the above problems, the present invention cuts an ultrasonic vibrating body, an ultrasonic vibrating part that vibrates the ultrasonic vibrating body ultrasonically, an anvil on which a sheet material is placed, and a sheet material with a cutting blade. It has a holding part, a holding part, and a control part that hold the cutting part, the ultrasonic vibrating body, and the sheet material in a non-contact state where the surfaces of the vibrating body and the sheet material face each other at regular intervals, and the control part uses the holding part. The surface of the sheet material placed on the anvil and the surface of the ultrasonic vibrating body are held in a non-contact state facing each other at regular intervals, and the ultrasonic vibrating body is ultrasonically vibrated by the ultrasonic vibrating part. The sheet material is vibrated by hitting the air sandwiched between the ultrasonic vibrating body and the sheet material in a non-contact state, and the sheet material is vibrated as a sound wave that vibrates the air. I try to disconnect.

In the present invention, the sheet material is superposed to the same extent as when the sheet receiving surface or the cutting blade is ultrasonically vibrated even when the sheet receiving surface or the cutting blade is not ultrasonically vibrated or is not vibrated. It can be oscillated with sound waves to ensure cutting, and the occurrence of burrs, drips, tears, etc. can be suppressed.

Further, the present invention has an advantage that the power of the ultrasonic vibrating portion can be small because the sheet material is directly ultrasonically vibrated and the sheet material is not ultrasonically vibrated via the sheet receiving surface and the cutting blade. ..

Further, in the present invention, even when the surface of the sheet material is processed, the ultrasonic vibrating body is not brought into contact with the sheet material, so that the sheet material can be reliably maintained without impairing the surface processing function of the sheet material. By cutting, it is possible to suppress the occurrence of burrs, drips, tears and the like.

The figure which showed the image of the cutting work of a sheet material which concerns on 1st Embodiment of this invention. The perspective view which showed the image of the cutting work of a sheet material which concerns on 1st Embodiment of this invention. The block diagram of the main part of the sheet material cutting apparatus which concerns on 1st Embodiment of this invention. The figure which showed the state in which the ultrasonic vibrating body which is ultrasonically vibrating by the sheet material cutting device which concerns on 1st Embodiment of this invention is brought close to the surface of a sheet material in a non-contact manner. The cutting blade is pressed against the sheet material for cutting in a state where the ultrasonic vibrating body ultrasonically vibrating by the sheet material cutting device according to the first embodiment of the present invention is brought close to the surface of the sheet material in a non-contact manner. The figure which showed the state just before starting. The cutting blade is pressed against the sheet material for cutting in a state where the ultrasonic vibrating body ultrasonically vibrating by the sheet material cutting device according to the first embodiment of the present invention is brought close to the surface of the sheet material in a non-contact manner. The figure which showed the state which the cut part was falling down. The flow chart which showed the basic operation of the sheet material cutting apparatus of the modification of 1st Embodiment of this invention. FIG. 5 is a flow chart showing an operation when cutting a sheet material by changing the frequency and amplitude of ultrasonic vibration in the operation of a sheet material cutting device according to a modified example of the first embodiment of the present invention. The figure which showed the image of the cutting work of a sheet material which concerns on the 2nd Embodiment of this invention. The figure which showed the image of the cutting operation of a sheet material which concerns on the modification of the 2nd Embodiment of this invention. The figure which showed the image of the cutting work of a sheet material which concerns on the 3rd Embodiment of this invention. The block diagram of the main part of the conventional sheet material cutting apparatus.

(First Embodiment)
The first embodiment will be described. FIG. 1 is a diagram showing an image of a cutting operation of the sheet material 7 according to the first embodiment. The sheet material that is the subject of the present invention is various materials such as plastic sheets, paper, ceramics, aluminum foil, metal foil such as copper foil, and the like.

As shown in FIG. 1, the sheet material cutting device of the first embodiment of the present invention includes a tool horn 1 which is an ultrasonic vibrating body, an ultrasonic vibrating unit 2 which ultrasonically vibrates the tool horn 1. It has a cutting blade 4 for cutting the sheet material. On the other hand, the sheet material 7 is placed on the anvil 3.

The surface of the sheet material 7 placed on the anvil 3 and the surface of the tool horn 1 are held in a non-contact state facing each other at regular intervals, and the tool horn 1 is held by the ultrasonic vibrating unit 2 in the vertical direction of FIG. When ultrasonic waves are vibrated, the tip of the tool horn 1 vibrates in the air, and the tip of the tool horn 1 hits air to generate sound waves to vibrate the air, causing the sheet material 7 to vibrate in the vertical direction shown in FIG. Then, in a state where vibration is induced in the sheet material 7, the cutting blade 4 is pressed against the sheet material 7 in the vertical direction, so that the tip of the cutting blade 4 easily enters the sheet material 7. Further, when the cutting blade 4 advances to the sheet material 7 and enters the sheet material 7 by the sheet thickness, the cutting is completed and the cut sheet material 7 falls. At this time, the sheet material 7 vibrates in the same vertical direction as the traveling direction of the cutting blade 4, and the cutting blade 4 smoothly cuts the sheet material 7, so that burrs, sagging, tears, etc. do not occur. ..

FIG. 2 is a perspective view showing an image of the cutting operation of the sheet material 7 of the first embodiment in a three-dimensional and easy-to-understand manner. As shown in FIG. 2, the tool horn 1 is arranged in a substantially cylindrical space formed by the cutting blade 4. Further, the anvil 3 is provided with a substantially columnar hole into which the cutting blade 4 fits with a gap.

More specifically, the cutting blade 4 has an outer peripheral surface having a constant diameter in the axial direction, and the diameter gradually increases from the base end side on which the inner peripheral surface is on the upper side toward the tip side for pressing the sheet material 7. It has a substantially cylindrical shape. That is, the cutting blade 4 has a sharp substantially cylindrical shape in which the outer peripheral surface and the inner peripheral surface coincide with each other on the tip side.

The tool horn 1 is arranged so as to be vertically movable in the truncated cone-shaped space formed by the inner peripheral surface of the cutting blade 4.

The diameter of the tool horn 1 decreases from the base end side on the ultrasonic vibration portion 2 side toward the tip end on the sheet material 7 side, and the tip portion has a disk shape with an increased diameter. The ultrasonic vibration unit 2 of the present embodiment ultrasonically vibrates the tool horn 1 in the axial direction. Then, as will be described in detail later, the tip of the tool horn 1 is not in contact with the sheet material 7, but the tip of the tool horn 1 hits the air and becomes a sound wave to vibrate the air and vibrate the sheet material 7. It is placed as close as possible.

As a result, the portion of the sheet material 7 to be cut (the circular shaded portion in FIG. 2) can be directly vibrated, and the cutting blade 4 performs cutting without causing burrs, sagging, tearing, etc. ..

FIG. 3 shows a configuration diagram of a main part of the cutting device for the sheet material 7 of the first embodiment. FIG. 3 shows a standby state before starting the cutting operation. The cutting device includes a lower frame 10a, a first vertical frame 10d forming a substantially U shape with the lower frame 10a, and a first upper frame 10e. It also has a lower frame 10a, a second vertical frame 10b forming a substantially inverted U shape, and a second upper frame 10c.

An anvil 3 is provided on the lower frame 10a, and a sheet material 7 is placed on the anvil 3. Further, in the anvil 3, a hole is formed at a position corresponding to the lower end of the cutting blade 4. An air cylinder 12 for a cutting blade that moves the cutting blade 4 up and down is attached downward to the upper surface of the first upper frame 10e.

The cutting blade air cylinder 12 has an actuator 11 that moves up and down, a slider 13 is provided at the tip thereof, and a cutting blade 4 is attached to the slider 13. As described above, the cutting portion having a function of cutting the sheet material 7 is composed of an air cylinder 12 for a cutting blade, an actuator 11, a slider 13, and a cutting blade 4. The cutting blade air cylinder 12 is connected to the cutting blade control unit 6c of the control unit 6 via a cable, and the cutting blade 4 is moved from the standby position to the thickness of the sheet material 7 by a signal from the cutting blade control unit 6c. It descends to a predetermined position to cut, and when the cutting is completed, it is raised to the standby position. A metal, ceramic, or the like is used as the material of the cutting blade 4.

On the other hand, on the upper surface of the second upper frame 10c, an ultrasonic air cylinder 9 for moving the ultrasonic vibrating portion 2 and the tool horn 1 up and down is attached downward. The ultrasonic air cylinder 9 has an actuator 8 that moves up and down, and has a slider 5 at its tip as a holding unit that holds the ultrasonic vibration unit 2 at a predetermined position. A tool horn 1 which is an ultrasonic vibrating body is attached to the lower tip of the ultrasonic vibrating unit 2.

The ultrasonic air cylinder 9 is connected to the ultrasonic movement control unit 6a of the control unit 6 via a cable, and the tool horn 1 is moved from the standby position during the cutting operation by the signal from the ultrasonic movement control unit 6a. It descends to a predetermined position near the sheet material 7, and when cutting is completed, it is raised to a standby position.

The ultrasonic vibration unit 2 is composed of an ultrasonic vibrator, and the vibration frequency of the ultrasonic vibrator can be, for example, 15 kHz to 40 kHz. The ultrasonic vibration unit 2 is connected to the ultrasonic vibration control unit 6b of the control unit 6 via a cable, and the ultrasonic vibrator superimposes at a predetermined frequency and amplitude by the oscillation signal from the ultrasonic vibration control unit 6b. Sound wave vibration induces ultrasonic vibration in the tool horn 1. Then, when the tool horn 1 vibrates in the air, the tip of the tool horn hits the air and becomes a sound wave to vibrate the air, causing the sheet material 7 to vibrate.

The control unit 6 includes an ultrasonic vibration control unit 6a, an ultrasonic movement control unit 6b, and a cutting blade control unit 6c. Further, it has a storage unit 6d, and the storage unit 6d stores in advance the vibration frequency and amplitude, which are vibration conditions, and the position data of the cutting blade 4 and the tool horn 1.

The position data is the position data in the vertical direction of the cutting blade 4 and the tool horn 1, and can be set before the cutting work. For example, the position data of the tool horn 1 and the cutting blade 4 in the standby state, the position data for the tool horn 1 to maintain the distance from the sheet material 7 suitable for vibrating the sheet material 7, and the cutting blade 4 being the sheet. Position data of the cutting blade 4 when it comes into contact with the surface of the material 7, position data of the cutting blade 4 when the cutting blade 4 is located at the center in the thickness direction of the sheet material 7, and the thickness of the sheet material 7 when the cutting blade 4 is located. There is position data of the cutting blade 4 when it has passed the minute.

The control unit 6 transmits a control signal to the ultrasonic air cylinder 9, the cutting blade air cylinder 12, and the ultrasonic vibration unit 2 according to preset cutting data including the positions of the cutting blade 4 and the tool horn 1. .. Since the cutting blade 4 and the tool horn 1 have an air cylinder as a drive source, they can be controlled at a position and timing specified by the control unit 6.

4 to 6 show a state of the cutting operation of the first embodiment. FIG. 4 shows a state in which the tool horn 1 is brought close to the surface of the sheet material 7, and FIG. 5 shows a state in which the cutting blade 4 is pressed against the sheet material 7 with the tool horn 1 close to the surface of the sheet material 7 to start cutting. The state immediately before is shown, and FIG. 6 shows a state in which the cutting is completed and the cut portion is falling downward. Further, FIG. 7 is a flow chart showing the basic operation of the cutting device for the sheet material 7 of the present invention.

The cutting operation of the first embodiment will be described with reference to FIGS. 3 to 7. In the state before the start of cutting, as shown in FIG. 3, the tool horn 1 is in a distant standby position above the sheet material 7 placed on the anvil 3. Further, the control unit 6 stores in advance the conditions such as the holding position of the tool horn 1 that keeps the distance from the sheet material 7 capable of vibrating the sheet material 7 by the ultrasonic vibration of the tool horn 1, the vibration frequency, and the amplitude. It is set in the part 6d.

When the work starts, the actuator 8 of the ultrasonic air cylinder 9 descends as shown in FIG. 4, and the tool horn 1 descends toward the preset holding position (step ST1 in FIG. 7).

When the tool horn 1 descends to the preset holding position, the tool horn 1 starts ultrasonic vibration by driving the ultrasonic vibration unit 2 by the ultrasonic vibration control unit 6b of the control unit 6 (step S2 in FIG. 7). .. At this time, when the tool horn 1 vibrates in the air, the tip of the tool horn 1 hits the air and becomes a sound wave to vibrate the air, causing the sheet material 7 to vibrate.

Next, as shown in FIG. 5, the actuator 11 of the cutting blade air cylinder 12 descends, and the cutting blade 4 descends toward the sheet material 7 and is pressed against the sheet material 7. At this time, since the cutting blade 4 is pressed against the sheet material 7 in a state where vibration is induced in the sheet material 7, the tip of the cutting blade 4 easily enters the sheet material 7.

Further, the cutting blade 4 advances to the sheet material 7, and as shown in FIG. 6, when the cutting blade 4 is lowered to the thickness of the sheet material 7, the sheet material 7 is cut and the cut portion falls (step ST3 in FIG. 7). ). At this time, since the cutting blade 4 smoothly advances to the sheet material 7 in a state where vibration is induced, burrs, sagging, tearing scratches, etc. do not occur.

When the cutting operation is completed, the vibration of the tool horn 1 is stopped (step ST4 in FIG. 7), the tool horn 1 and the cutting blade 4 are raised and returned to the standby position shown in FIG. 3 (step ST5 in FIG. 7).

As described above, in the first embodiment, the sheet material 7 and the tool horn 1 are held in a non-contact state without directly ultrasonically vibrating the cutting blade 4 and the anvil 3, and the tool horn 1 is superposed. By vibrating the sheet material 7 by ultrasonic vibration and cutting when the sheet material 7 is vibrating, the sheet material 7 is surely cut, and the occurrence of burrs, sagging, tears, etc. is suppressed. be able to.

In the first embodiment, a mode in which the ultrasonic air cylinder 9 and the cutting blade air cylinder 12 are provided and the tool horn 1 and the cutting blade 4 are moved up and down by a signal from the control unit 6 has been described. The moving function is configured by using a motor and a gear, and various forms can be adopted as long as it can be controlled by the control unit 6.

It is also possible to provide a handle on the slider 13 that holds the cutting blade 4 and press the handle without using an air cylinder, a motor, or the like to perform cutting.

(Modified example of the first embodiment)
A modified example of the first embodiment will be described. In the modified example of the first embodiment, when the cutting blade 4 is pressed against the sheet material 7 and a pressing force is applied during the cutting operation, the vibration state of the sheet material 7 changes. In order to proceed with good cutting even when a pressing force is applied, the vibration conditions are changed to the appropriate vibration frequency and amplitude in this state.

The control unit 6 has a function of adjusting one or both of the frequency and amplitude of the vibration in the ultrasonic vibration unit 2 by the ultrasonic vibration control unit 6a and the storage unit 6d. Specifically, the frequency and amplitude of the ultrasonic vibration unit 2 are changed by the signal from the ultrasonic vibration control unit 6a, and the frequency and amplitude of the tool horn 1 are also changed. This makes it possible to change the vibration state of the sheet material 7 during the cutting operation.

FIG. 8 is a flow chart showing the operation at this time. The operation of the modified example of the first embodiment will be described with reference to FIGS. 3 to 6 and 8.

In the state before the start of cutting, as shown in FIG. 3, the tool horn 1 is in a distant standby position above the sheet material 7 placed on the anvil 3. Further, the holding position of the tool horn that keeps the distance from the sheet material capable of vibrating the sheet material 7 by the ultrasonic vibration of the tool horn 1 and the initial conditions of the vibration frequency and the amplitude are set in the storage unit 6d of the control unit 6. Has been done.

When the work starts, as shown in FIG. 4, the ultrasonic air cylinder 9 is controlled by the signal of the ultrasonic movement control unit 6b, and the tool horn 1 descends toward the holding position set in the storage unit 6d. (Step ST11 in FIG. 8).

When the tool horn 1 descends to the holding position, the tool horn 1 starts ultrasonic vibration by driving the ultrasonic vibration unit 2 by the ultrasonic vibration control unit 6a (step S12 in FIG. 8). At this time, when the tool horn 1 vibrates in the air, the tip of the tool horn 1 hits the air and becomes a sound wave to vibrate the air, causing the sheet material 7 to vibrate.

Next, as shown in FIG. 5, the actuator 11 of the cutting blade air cylinder 12 descends toward the sheet material 7 by the signal of the cutting blade control unit 6c (step S13 in FIG. 8), and the cutting blade 4 descends. It reaches the surface of the sheet material 7. At this time, the cutting blade 4 is pressed against the sheet material 7 in a state where ultrasonic vibration is induced on the sheet material 7 under the initial vibration conditions.

Here, when the cutting blade 4 is pressed against the sheet material 7 and a pressing force is applied, the vibration state of the sheet material 7 changes. In order to proceed with good cutting even when the pressing force is applied, it is necessary to change from the initial vibration frequency and amplitude to the appropriate vibration frequency and amplitude when the pressing force is applied, so the vibration conditions are changed ( YES in step ST14 of FIG. 8, a new vibration frequency and amplitude different from the initial values are called from the storage unit 6d of the control unit 6, and new vibration conditions are set in the ultrasonic vibration unit 2 (FIG. 8). Step ST15).

Under the new vibration condition, the cutting blade 4 further descends and advances in the thickness direction of the sheet material 7, and as shown in FIG. 6, when the cutting blade 4 descends to the thickness of the sheet material 7 (FIG. 8). Step ST16), the sheet material 7 is cut and the cut portion falls. At this time, the newly set vibration frequency and amplitude values of the tool horn 1 induce vibration in the sheet material 7, and the cutting blade 4 smoothly advances to the sheet material 7, causing burrs, drooling, and tearing. Good cutting is performed without causing scratches. Then, the tool horn 1 stops vibrating (step ST17 in FIG. 8), the cutting blade 4 and the tool horn 1 return to the standby position (step ST18 in FIG. 8), and the cutting operation is completed.

By this operation, an appropriate cutting operation becomes possible even when the state for vibrating the sheet material 7 changes due to the progress of the cutting blade 4 to the sheet material 7.

In the above operation, when the surface of the sheet material 7 was reached and the cutting blade 4 began to enter the sheet material 7, the second vibration condition was changed to a different vibration condition from the initial state, but the cutting blade 4 further lowered to the sheet. When the vibration state of the sheet material 7 changes in the thickness direction of the material 7 and it is necessary to further change the vibration conditions, the operations up to step ST13 through YES in step ST14 and step ST15 may be repeatedly executed. It is possible. For example, the position of the cutting blade 4 in which the cutting blade 4 has advanced to the intermediate thickness of the sheet material 7 and the third vibration condition are stored in the storage unit 6d of the control unit 6, and the cutting blade 4 advances to the intermediate thickness of the sheet material 7. When it is done, it can be changed to the third vibration condition.

In the above explanation, an example in which the vibration frequency and the amplitude are changed as the vibration conditions is shown, but the distance between the tool horn 1 and the sheet material 7 (the holding position of the tool horn 1) is included in the vibration conditions and changed. May be good. By adding signals from the ultrasonic movement control unit 6b to the above-mentioned ultrasonic vibration control unit 6a and storage unit 6d and changing the distance between the tool horn 1 and the sheet material 7 as well as the frequency and amplitude, it is more detailed. Disconnection conditions can be set.

As described above, in the modified example of the first embodiment, even when the vibration state of the sheet material 7 changes during the cutting operation, the frequency and amplitude of the ultrasonic vibration of the tool horn 1 and the tool horn 1 By inducing vibration in the sheet material 7 and cutting it while changing the distance between the sheet material 7 and the sheet material 7, the sheet material 7 is surely cut, and the occurrence of burrs, drool, tears, etc. is suppressed. Can be done.

The sheet material 7 to be cut includes various materials such as a plastic sheet, a plastic film, a metal foil such as an aluminum foil and a copper foil, and ceramics, and the thickness of the sheet material 7 is also different. Since the conditions for vibrating the sheet material 7 change when the material and thickness change in this way, in order to realize smooth cutting without burrs, drips, tears, etc., the ultrasonic vibrating unit 2 It becomes necessary to change the frequency and amplitude of ultrasonic vibration. Specifically, a data table showing the relationship between the material and thickness of the sheet material 7 and the frequency and amplitude of the ultrasonic vibration of the ultrasonic vibration unit 2 is prepared in the storage unit 6d, and the control unit 6 is based on the data table. Take control. Even if the material and thickness of the sheet material 7 are changed in this way, the modified example of the first embodiment is useful because the sheet material can be cut by changing the frequency and amplitude of the ultrasonic vibration.

(Second embodiment)
The second embodiment will be described. FIG. 9 is a diagram showing an image of the cutting work of the sheet material 27 according to the second embodiment. When the member to be cut is small, the substantially circular space formed by the cutting blade 4 as shown in FIG. 2 of the first embodiment becomes small, and the tool horn 1 cannot be arranged in the space. Therefore, as shown in FIG. 9, the tool horns 21a and 21b and the ultrasonic vibrating portions 22a and 22b are arranged above the sheet material 27 which is the outside of the cutting blade 4.

In the second embodiment, the tool horns 21a and 21b and the ultrasonic vibrating portions 22a and 22b for vibrating the respective tool horns are provided above the sheet material 27 which is the outside of the cutting blade 4. Unlike the first embodiment, the other configurations are the same as in the first embodiment.

As described above, in the second embodiment, even when the tool horn cannot be arranged in the substantially circular space formed by the cutting blade 4 as in the case of cutting a small member, the sheet material 27 is vibrated. Can be induced. Then, the sheet material 7 can be reliably cut, and the occurrence of burrs, drips, tears, etc. can be suppressed.

(Modified example of the second embodiment)
FIG. 10 shows a state of cutting work in which continuous sheet materials are fed by rollers as a modified example of the second embodiment. In the modified example of the second embodiment, it is the second that the sheet feed roller 38 for feeding the continuous sheet material 37 is provided and that the tips of the tool horns 31a and 31b are directed to the cut portion of the sheet material 37. Different from the embodiment. Other configurations are the same as in the second embodiment.

In the modified example of the second embodiment, when one step of the cutting work is completed, the cutting blade 4 is once raised to the standby position, and then the sheet feed roller 38 is driven to move the continuous sheet material 37 into one step. Transport only the amount and perform the cutting work again. By alternately performing such cutting work and sheet feeding work, the continuous sheet material 37 can be continuously cut.

Further, by directing the tips of the tool horns 31a and 31b to the cut portion of the sheet material 37, the sheet material 37 can be vibrated more efficiently. As a result, the sheet material 7 can be reliably cut, and the occurrence of burrs, drips, tears, etc. can be suppressed.

The frequencies and amplitudes of the ultrasonic vibration units 32a and 32b may be the same, or may be different frequencies and amplitudes. Depending on the feed speed and roller tension of the sheet feed roller 38, the vibration state of the continuous sheet material 37 may differ between the inlet side and the outlet side of the cutting blade 34 even if the frequencies and amplitudes of the ultrasonic vibrating portions 32a and 32b are the same. By setting the frequencies and amplitudes of the ultrasonic vibration units 32a and 32b to different values, the vibration of the continuous sheet material 37 can be kept in an appropriate state more finely.

(Third embodiment)
A third embodiment will be described. FIG. 11 shows a state of the cutting operation of the third embodiment. When the sheet material to be cut is heavy such as thick metal, as in the second embodiment, two ultrasonic vibrating parts and two tool horns are provided on the outer side of the cutting blade. It may not be possible to induce the vibration required for cutting the sheet material only by providing it in.

Therefore, in the third embodiment, the pair of ultrasonic vibrating portions 42a and 42b and the pair of tool horns 41a and 41b are arranged above the sheet material 47 on the outside of the cutting blade 44, and further with the pair of ultrasonic vibrating portions 42c. 42d and a pair of tool horns 41c and 41d are arranged below the sheet material 47. As a result, even when the sheet material 47 to be cut is heavy, vibration can be induced in the sheet material 47, the sheet material 7 can be reliably cut, and burrs, sagging, tears, etc. are generated. It can be suppressed.

In the third embodiment, unlike the first embodiment, the ultrasonic vibrating portions 42a, 42b, 42c, and 42d are provided above and below the sheet material 47 which is the outside of the cutting blade 44, which is another configuration. Is the same as in the first embodiment.

The vibration frequencies and amplitudes of the ultrasonic vibration units 42a, 42b, 42c, and 42d can be set separately by the control signal from the ultrasonic vibration control unit 6b, and may be the same or different from each other. May be good. For example, the ultrasonic vibrating portions 42a and 42b arranged above the sheet material 47 have the same vibration frequency and amplitude, and the ultrasonic vibrating portions 42c and 42d arranged below the sheet material 47 are ultrasonic waves arranged above the above. The vibration frequency and amplitude can be adjusted to be different from those of the vibrating units 42a and 42b. By setting the vibration frequency and the amplitude to different values above and below the sheet material 47, it is possible to keep the vibration of the sheet material 47 in an appropriate state more finely.

In each of the above embodiments and modifications, the cutting blade has a substantially cylindrical shape, but the shape of the cutting blade is not limited to this, and is, for example, a cylindrical shape having a rectangular cross section or a polygonal cross section. You may. Further, the shape of the tool horn and the shape of the cutting blade may be other shapes.

Further, in each of the above embodiments and modifications, it has been described that the sheet material is vibrated by sound waves by hitting air in a non-contact manner, but the sheet material is not completely non-contact and is lightly formed within the amplitude range of the tool horn. The contact may be made, or the contact may be made lightly even if the contact is outside the amplitude range of the tool horn.

The present invention is a method for reliably cutting a sheet material without burrs, drips, tears, etc., even when the sheet receiving surface or the cutting blade is not ultrasonically vibrated or ultrasonically vibrated. And can be applied to sheet material cutting equipment.

1 Tool horn (ultrasonic vibrating body)
2 Ultrasonic vibration part 3 Anvil 4 Cutting blade 5 Slider (holding part)
6 Control unit 6a Ultrasonic vibration control unit 6b Ultrasonic movement control unit 6c Cutting blade control unit 6d Storage unit 7 Sheet material 8, 11 Actuator 9 Ultrasonic air cylinder 10a Lower frame 10b Second vertical frame 10c Second upper Frame 10d First vertical frame 10e First upper frame 12 Air cylinder for cutting blade 13 Slider

Claims (12)

Ultrasonic vibrating body and
An ultrasonic vibrating unit that vibrates the ultrasonic vibrating body with ultrasonic waves,
Anvil on which the sheet material is placed and
A cutting portion that cuts the sheet material with a cutting blade,
A holding portion that holds the ultrasonic vibrating body and the sheet material in a non-contact state in which the surfaces face each other at regular intervals.
Has a control unit
In the control unit, the surface of the sheet material placed on the anvil and the surface of the ultrasonic vibrating body are not in contact with each other by using the holding unit, but the ultrasonic vibration of the ultrasonic vibrating body is transmitted through air. The sheet material is arranged close enough to vibrate, the ultrasonic vibrating body is ultrasonically vibrated by the ultrasonic vibrating portion, and the sheet material is vibrated by the ultrasonic vibration of the ultrasonic vibrating body. A sheet material cutting device characterized in that the sheet material is cut at the cutting portion when the sheet material is vibrating. Ultrasonic vibrating body and
An ultrasonic vibrating unit that vibrates the ultrasonic vibrating body with ultrasonic waves,
Anvil on which the sheet material is placed and
A cutting portion that cuts the sheet material with a cutting blade,
A holding portion that holds the ultrasonic vibrating body and the sheet material in a state where their surfaces face each other, and
Has a control unit
The control unit is arranged by using the holding unit so that the surface of the sheet material placed on the anvil and the surface of the ultrasonic vibrating body face each other, and the ultrasonic vibrating body is placed in the ultrasonic vibrating unit. It is characterized in that the sheet material is vibrated by ultrasonic vibration and the sheet material is vibrated by the ultrasonic vibration of the ultrasonic vibrating body so that the sheet material is cut by the cutting portion when the sheet material is vibrating. A device for cutting sheet materials. When the sheet material vibrates and the sheet material is cut by the cutting portion, the ultrasonic vibrating body is controlled to vibrate ultrasonically at different vibration frequencies or amplitudes. The sheet material cutting apparatus according to claim 1 or 2. Having a plurality of the ultrasonic vibrating bodies,
The sheet material cutting apparatus according to any one of claims 1 to 3, wherein the plurality of ultrasonic vibrating bodies are arranged above the sheet material. Having a plurality of the ultrasonic vibrating bodies,
The sheet material cutting apparatus according to any one of claims 1 to 3, wherein the plurality of ultrasonic vibrating bodies are arranged above and below the sheet material. The sheet material cutting apparatus according to any one of claims 1 to 5, wherein the tip of the ultrasonic vibrating body is directed to a cutting portion of the sheet material. Ultrasonic vibrating body and
An ultrasonic vibrating unit that vibrates the ultrasonic vibrating body with ultrasonic waves,
Anvil on which the sheet material is placed and
A cutting portion that cuts the sheet material with a cutting blade,
A holding portion that holds the ultrasonic vibrating body and the sheet material in a non-contact state in which the surfaces face each other at regular intervals.
Using a control unit and a sheet material cutting device having
In the control unit, the surface of the sheet material placed on the anvil and the surface of the ultrasonic vibrating body are not in contact with each other by using the holding unit, but the ultrasonic vibration of the ultrasonic vibrating body is transmitted through air. The sheet material is arranged close enough to vibrate, the ultrasonic vibrating body is ultrasonically vibrated by the ultrasonic vibrating unit, and the sheet material is ultrasonically vibrated by the ultrasonic vibration of the ultrasonic vibrating body. A method for cutting a sheet material, which comprises cutting the sheet material at the cutting portion when the sheet material is vibrating. Ultrasonic vibrating body and
An ultrasonic vibrating unit that vibrates the ultrasonic vibrating body with ultrasonic waves,
Anvil on which the sheet material is placed and
A cutting portion that cuts the sheet material with a cutting blade,
A holding portion that holds the ultrasonic vibrating body and the sheet material in a state where their surfaces face each other, and
Using a control unit and a sheet material cutting device having
The control unit is arranged by using the holding unit so that the surface of the sheet material placed on the anvil and the surface of the ultrasonic vibrating body face each other, and the ultrasonic vibrating body is placed in the ultrasonic vibrating unit. It is characterized in that the sheet material is vibrated by ultrasonic vibration and the sheet material is vibrated by the ultrasonic vibration of the ultrasonic vibrating body so that the sheet material is cut by the cutting portion when the sheet material is vibrating. How to cut the sheet material. 7. The invention is characterized in that, when the sheet material vibrates and the sheet material is cut by the cutting portion, the ultrasonic vibrating body is ultrasonically vibrated at a different vibration frequency or amplitude. Alternatively, the method for cutting a sheet material according to 8. Having a plurality of the ultrasonic vibrating bodies,
The method for cutting a sheet material according to any one of claims 7 to 9, wherein the plurality of ultrasonic vibrating bodies are arranged above the sheet material. Having a plurality of the ultrasonic vibrating bodies,
The method for cutting a sheet material according to any one of claims 7 to 9, wherein the plurality of ultrasonic vibrating bodies are arranged above and below the sheet material. The method for cutting a sheet material according to any one of claims 7 to 11, wherein the tip of the ultrasonic vibrating body is directed to a cutting portion of the sheet material.

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