CN217751633U - Fly cutter cutting device - Google Patents

Abstract

The utility model discloses a fly cutter cutting device, including supporting seat, cutter unit spare, a plurality of guide drive arrangement. The cutter component comprises a cutter holder and a cutter. The plurality of guides include a channel and a slot, and the cutter may pass through the slot of the guide. The tool apron is fixed on a rotating shaft of the driving device, and the driving device drives the cutter assembly to rotate, so that the cutter penetrates through the cutting groove to cut the to-be-cut object in the corresponding channel in the rotating process. The utility model discloses fly cutter cutting device's cutter can once cut a plurality of plans and cut article in a plurality of guide passageways, has realized that a sword cuts a plurality of plans and cuts article, and this can improve cutting efficiency greatly.

Description

Fly cutter cutting device

Technical Field

The utility model relates to a cutting technical field, in particular to fly cutter cutting device.

Background

Currently, common mechanical pipe cutting machines are classified into a gantry type pipe cutting machine, a rotary type pipe cutting machine, and a fly cutter type pipe cutting machine. The pipe cutting machine with the Chinese patent publication number of CN206855523U and the pipe cutting machine with the Chinese patent publication number of CN214025826U for cutting the silicon resin glass fiber heat-shrinkable tube are gantry type pipe cutting machines, and the pipes in the pipe cutting machines are easy to deviate, the cutting openings are irregular, and the cutting effect is poor. Chinese patent publication is CN206869211U a pipe cutting machine for cutting pyrocondensation pipeline, CN112297075A MPP cable protection pipe cutting device, is rotation type pipe cutting machine, and this kind of pipe cutting machine is fit for cutting the pipe that thickness is than thin, cuts the easy incision of the pipe that thickness is than thick untidy, has the burr, and the cutting effect is not good. Meanwhile, the two pipe cutters have poor adaptability and can only cut pipes of one specification.

The existing fly cutter cutting device is not reasonable in design, so that although production is basically met, practical operation has disadvantages, particularly, the fly cutter simultaneously cuts a plurality of pipes, for example, a certain time difference exists during cutting, so that the pipes obtained by cutting have different lengths; the fly cutter is not uniformly stressed, stress points are positioned at the same position, and the fly cutter is easy to break; when the pipe is cut, the local cutting heat is too high, and the cut is easy to be irregular; poor adaptability to pipes of different specifications and the like. Therefore, in actual production, the speed of the fly cutter needs to be reduced sometimes, and shutdown maintenance is needed sometimes, so that a lot of time waste is caused, and raw materials are wasted, thereby wasting time, labor and money.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a fly cutter cutting device aims at improving cutting effect and efficiency, the cutting of adaptable multiple size article simultaneously.

In order to achieve the above object, the utility model provides a fly-cutter cutting device, include:

a supporting base;

the cutter assembly comprises a cutter holder and a cutter, and one end of the cutter is fixed on the cutter holder;

a plurality of guides each having a cutting groove and a passage for passing the cut object, the cutter being capable of passing through the cutting groove of the guide, the plurality of guides being provided on the support base;

the cutter holder is fixed on a rotating shaft of the driving device; the driving device drives the cutter assembly to rotate, so that the cutter penetrates through the cutting groove to cut the to-be-cut object in the corresponding channel in the rotating process.

Further, the cutters of the cutter assembly are arranged along the rotating shaft of the driving device in the radial direction, and the plurality of guide pieces are arranged along the rotating shaft of the driving device in the radial direction.

Furthermore, the cutter component is arranged along the radial direction of the rotating shaft of the driving device, the cutter and the cutter holder form a certain included angle, and the included angle formed by the arrangement direction of the plurality of guide pieces and the cutter holder is the same as the included angle formed by the cutter and the cutter holder.

Further, the plurality of guides are arranged radially along the rotational axis of the drive device; or the plurality of guide members are arranged at intervals circumferentially around the rotating shaft of the driving device; or the plurality of guide members are arranged in a staggered way around the rotating shaft of the driving device in the circumferential direction.

Preferably, the flying knife cutting device further comprises a first rotating ring, and the other end of the cutting knife is fixed on the first rotating ring; the first rotating ring is arranged outside the cutter assembly in a surrounding manner by taking a rotating shaft of the driving device as a center;

and the second rotating ring is driven by another driving device to drive the first rotating ring to rotate, so that the angular speed of the first rotating ring is the same as that of the cutter assembly.

Further, a gear is arranged around the outer periphery of the first rotating ring, and a gear is arranged around the outer periphery of the second rotating ring; the first rotating ring and the second rotating ring are meshed through a gear, so that the second rotating ring drives the first rotating ring to rotate.

Furthermore, the supporting seat comprises a first fixing plate, a second fixing plate and a connecting plate, wherein the first fixing plate and the second fixing plate are oppositely arranged and are connected through the connecting plate; the first fixing plate is provided with a rotating bracket, and the first rotating ring is connected with the first fixing plate through the rotating bracket and can rotate around the rotating bracket.

Preferably, the fly cutter cutting device further comprises a cooling device, the cooling device comprises a cooling box and a cooling medium, the cooling medium is arranged in the cooling box, and the cooling device is used for cooling the cutter.

Preferably, the flying knife cutting device further comprises a traction device for drawing the item to be cut through the channel; the guide interfaces with the traction device to facilitate the threading of the item of pseudo-cutting into the channel.

Preferably, the flying knife cutting device is further provided with a detection device and a control device, the detection device is used for detecting the length of the cut article and feeding back the length parameter to the control device, the control device compares the length parameter with a set standard length parameter, and then the control device adjusts the rotating speed of the driving device or the traction speed of the article to be cut according to the comparison result, so that the length of the cut special article is consistent with the set standard length parameter.

Preferably, the flying knife cutting device is further provided with an alarm device, the alarm device comprises an inductor, an alarm and a PLC (programmable logic controller), the inductor is used for detecting whether an article to be cut exists in front of the traction device and transmitting a signal of the article which cannot be detected to the PLC, and the PLC controls the alarm to give an alarm according to the signal of the article which cannot be detected.

Preferably, the flying knife cutting device is further provided with an alarm device, the alarm device comprises an inductor, an alarm and a PLC (programmable logic controller), the inductor is used for detecting whether a to-be-cut object exists in front of the traction device and transmitting a detected original signal to the PLC, and the PLC compares a threshold value of the original signal with a set threshold value and controls the alarm to give an alarm according to a comparison result.

Preferably, the knife is a non-stick knife, a PTFE knife or a ceramic knife.

The utility model discloses fly cutter cutting device's cutter can once cut a plurality of plans and cut article in a plurality of guide passageways, has realized that a sword cuts a plurality of plans and cuts article, and this can improve cutting efficiency greatly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment 1 of a fly-cutter cutting device provided by the present invention;

fig. 2 is another schematic structural diagram of the flying knife cutting device according to embodiment 1 provided by the present invention;

fig. 3 is a schematic structural diagram of embodiment 1 of the fly-cutter cutting device provided by the present invention;

fig. 4 is a schematic structural diagram of embodiment 2 of the flying knife cutting device provided by the present invention;

fig. 5 is a schematic structural diagram of embodiment 3 of the flying knife cutting device provided by the present invention;

fig. 6 is a schematic structural diagram of an embodiment 4 of the fly-cutter cutting device provided by the present invention;

fig. 7 is a schematic structural diagram of an embodiment 5 of the fly-cutter cutting device provided by the present invention;

fig. 8 is a schematic structural diagram of embodiment 6 of the flying knife cutting device provided by the present invention.

The reference numbers indicate:

reference numerals	Name(s)	Reference numerals	Name (R)
				10	Supporting seat	40	First rotating ring
11	First fixing plate	41	Gear wheel
				111	Rotating support	50	Second rotating ring
12	Second fixing plate	70	Cooling device
				13	Connecting plate	71	Cooling box
20、20′、20″	Cutter assembly	72	Cooling cover plate
				21、21″	Tool apron	80	Traction device
22、22′、22″	Cutting knife	90	Alarm device
				30、30′、30″	Guiding piece	91	Inductor
31	Channel	92	Alarm device
				32	Cutting groove	93	Supporting plate
60	Drive device	A	Article with a cover

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, back, 8230; \8230;) are provided in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B," including either the A or B arrangement, or both A and B satisfied arrangement. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Example 1

Referring to fig. 1 to 2, an embodiment 1 of the fly-cutter cutting device of the present invention is disclosed, which includes a supporting base 10, a cutter assembly 20, a plurality of guides 30 and a driving device 60.

The supporting seat 10 comprises a first fixing plate 11, a second fixing plate 12 and a connecting plate 13, wherein the first fixing plate 11 and the second fixing plate 12 are oppositely arranged and connected through the connecting plate 13; the first fixing plate 11 is provided with a rotating bracket 111, and the first rotating ring 40 is connected to the first fixing plate 11 through the rotating bracket 111 and can rotate around the rotating bracket 111. Of course, the support base 10 may be other structures known to those skilled in the art, as long as it can play a certain role of fixing support.

The cutter assembly 20 includes a cutter seat 21 and a cutter 22, and one end of the cutter 22 is fixed on the cutter seat 21.

Each guide 30 is provided with a slot 32 and a passage 31 for passing through the cut object a, the cutter 22 can pass through the slot 32 of the guide 30, and a plurality of guides 30 are provided on the support base 10.

The guide member 30 passes through the first fixing plate 11 and the second fixing plate 12 in sequence, and the guide member 30 can be fixedly connected with the first fixing plate 11 and the second fixing plate 12 through bolts, so that the guide member 30 is convenient to detach and replace. Further, a cutting groove 32 is provided in each guide 30, the width of the cutting groove 32 needs to be slightly larger than the thickness of the cutting knife 22 so as to prevent the cutting knife 12 from shaking or breaking when cutting the article a to be cut, and the length of the cutting groove 32 can be smaller than the inner diameter of the guide 30 so as to allow the cutting knife to smoothly pass through, thereby facilitating the cutting of the article a to be cut in the corresponding channel 31 by the cutting knife 22 passing through the cutting groove 32 of the guide 30. The guide member 30 makes the intended cutting article a enter the channel 31 more easily, and simultaneously can prevent the intended cutting article a from deviating in position during the traction process, thereby guiding and limiting the intended cutting article a.

The tool apron 21 is fixed on the rotating shaft of the driving device 60; the driving device 60 drives the cutter assembly 20 to rotate, so that the cutter 22 cuts the article a to be cut in the corresponding channel 31 through the cutting groove 32 during the rotation. It should be noted that the driving device 60 may be a motor, and the motor may be a high-speed servo motor with 3000-5000 rpm, and the high-speed cutting can make the cut of the object to be cut a smoother.

The utility model discloses fly sword cutting device's cutter 22 can once cut a plurality of plans and cut article A in a plurality of guides 30 passageways 31, has realized that a sword cuts a plurality of plans and cuts the article, and this can improve cutting efficiency greatly.

As a further improvement of this embodiment, the fly cutter cutting device further includes a first rotating ring 40 and a second rotating ring 50, and the other end of the cutting knife 22 is fixed on the first rotating ring 40; the first rotating ring 40 is arranged around the cutter assembly by taking the rotating shaft of the driving device 60 as a center; the second rotating ring 50 is driven by another driving device to rotate the first rotating ring 40, so that the angular velocity of the first rotating ring 40 is the same as the angular velocity of the cutter assembly 20. This can guarantee that cutter 22's both ends angular velocity is the same when rotating to guarantee that cutter 22 does not split, does not rock, does not drift, and then guarantee that the incision is level and smooth no burr, realize the improvement of cutting efficiency.

In the present embodiment, the first rotating ring 40 is provided with a gear 41 around the outer circumference thereof, and the second rotating ring 50 is provided with a gear 41 around the outer circumference thereof; the first rotating ring 40 and the second rotating ring 50 are meshed through the gear 41, so that the second rotating ring 50 drives the first rotating ring 40 to rotate.

As a further improvement of this embodiment, the fly cutter device further comprises a cooling device 70, the cooling device 70 comprises a cooling box 71 and a cooling medium, the cooling medium is placed in the cooling box 71, and the cooling device 70 is used for cooling the cutting knife 22, so as to further improve the quality of the cut.

In the present embodiment, referring to fig. 1 in combination, the cooling box 71 is fixedly connected to the first fixing plate 11 by bolts, a cooling medium is placed in the cooling box 71, the cooling medium is adsorbed on a cooling sponge located in the cooling box 71, and a cooling cover plate 72 is further disposed on the top of the cooling box 71. When the cutter 22 passes through the cutting groove 32 during rotation to cut the article a to be cut in the passage 31, the cutter 22 contacts the cooling sponge absorbed with the cooling medium in the cooling box 71 to cool the cutter 22, thereby lowering the temperature of the cutter 22 and improving the quality of the cut. Specifically, the cooling medium may be water or alcohol. Of course, the cooling device 70 may be installed at other positions of the support base 10, and is not limited to the first fixing plate 11 in this embodiment.

Of course, the cooling device 70 of the present invention is not limited to the above form, and any other device capable of achieving a cooling effect may be used, such as an air cooling device.

As a further improvement of this embodiment, the fly-cutter cutting device further comprises a traction device 80, the traction device 80 is used for drawing the pseudo-cutting object a through the channel 31; the guide 30 interfaces with a pulling device 80 to facilitate threading of the item a to be cut into the channel 31. In particular, the traction device 80 is a pipe tractor, such as: a crawler tractor. The specific structure is the prior art well known to those skilled in the art, and will not be described in detail in this embodiment, and the speed of the virtual object a passing through the channel 31 can reach 60-100 m/min.

In this embodiment, the article to be cut a may be a tube, such as a soft tube or a hard tube, and the tube may be made of a medical tube, a heat-shrinkable sleeve, or the like; the hard pipe material comprises a PVC pipe, a PE pipe and the like. Of course, the article to be cut a may be other articles besides the pipe, and is not limited herein. As a further improvement of this embodiment, the fly-cutter cutting device is further provided with a detection device and a control device, the detection device is used for detecting the length of the cut article and feeding back the length parameter to the control device, the control device compares the length parameter with a set standard length parameter, and then adjusts the rotation speed of the driving device or the traction speed of the article to be cut according to the comparison result, so that the length of the cut special article is consistent with the set standard length parameter.

As a further improvement of this embodiment, the flying knife cutting device is further provided with an alarm device 90, the alarm device 90 includes a sensor 91, an alarm 92 and a PLC programmable controller, the sensor 91 is used to detect whether an article a to be cut exists before the traction device 80, and transmit a signal that the article cannot be detected to the PLC programmable controller, and the PLC programmable controller controls the alarm 92 to alarm according to the signal that the article cannot be detected.

As a further improvement of this embodiment, the flying knife cutting device is further provided with an alarm device 90, the alarm device 90 includes a sensor 91, an alarm 92 and a PLC programmable controller, the sensor 91 is used to detect whether a virtual cutting object a exists before the traction device 80, and transmit a detected original signal to the PLC programmable controller, the PLC programmable controller compares a threshold value of the original signal with a set threshold value, and controls the alarm 92 to alarm according to a comparison result.

In this embodiment, please refer to fig. 3, the alarm device 90 includes a sensor 91, an alarm 92, and a PLC programmable controller (not shown in the figure), the supporting plate 93 is fixedly connected to a surface of the first fixing plate 11 away from the second fixing plate, the sensor 91 is fixedly connected to the supporting plate 93 and disposed at an inlet of the traction device 80, the sensor 91 is configured to detect whether a pseudo-cutting object a exists before the traction device 80, when the object a is conveyed, and the sensor 91 cannot detect the object a, the sensor 91 transmits a signal of the undetected object to the PLC programmable controller, and the PLC programmable controller controls the alarm 92 to alarm according to the signal of the undetected object; the sensor 91 may directly transmit the detected original signal to the PLC, and the PLC compares the threshold value of the original signal with the set threshold value, and controls the alarm 92 to alarm according to the comparison result.

In this embodiment, the cutting blade 22 is preferably a non-stick blade, a PTFE blade, or a ceramic blade, but may be any other blade capable of cutting.

Example 2

Referring to fig. 3, an embodiment 2 of the flying-blade cutting device of the present invention is disclosed, which is similar to embodiment 1 except that: the cutting knife 22' of the cutting knife assembly 20' is radially arranged along the rotating shaft of the driving device 60, and the plurality of guide members 30' are radially arranged along the rotating shaft of the driving device 60, so that the cutting line of the cutting knife 22' can simultaneously cut the articles a to be cut on the plurality of guide members 30' during cutting.

When the flying cutter cutting device works, when the cutter 22' of the cutter assembly 20' rotates to the arrangement position of the plurality of guide members 30', each cutting point in the cutting line of the cutter 22' can simultaneously cut the articles A to be cut on the plurality of guide members 30', and therefore the phenomena that the length of the cut articles is different and the inclined opening occurs on the plurality of articles A to be cut due to the time difference existing when the articles A are cut can be avoided.

Example 3

Referring to fig. 4, an embodiment 3 of the flying-cutter cutting device of the present invention is disclosed, which is similar to embodiment 2 and differs therefrom in that: the cutter assembly 20 "is arranged along the radial direction of the rotating shaft of the driving device 60, the cutter 22" forms a certain included angle with the cutter seat 21 ", and the arrangement direction of the plurality of guiding elements 30" forms an included angle with the cutter seat 21 "which is the same as the included angle formed by the cutter 22" and the cutter seat 21 ".

When the flying knife cutting device works, when the cutting knife 22 of the cutting knife assembly 20 rotates to the arrangement position of the plurality of guide members 30', each cutting point in the cutting line of the cutting knife 22 can simultaneously cut the articles A to be cut on the plurality of guide members 30', so that the phenomena of different lengths and inclined openings of the articles A to be cut due to time difference existing in the cutting process of the plurality of articles A to be cut can be avoided.

Example 4

Referring to fig. 5, an embodiment 4 of the flying-cutter cutting device of the present invention is disclosed, which is similar to embodiment 1, and the differences are: a plurality of guides 30 are arranged radially along the axis of rotation of the drive. This stress point that can disperse cutter 22 avoids cutter 22's stress point to be located same position, prevents to appear breaking the sword phenomenon.

Example 5

Referring to fig. 6, an embodiment 5 of the flying-blade cutting device of the present invention is disclosed, which is similar to embodiment 1 except that: the plurality of guides 30 are circumferentially spaced around the axis of rotation of the drive means, which solves the problem of simultaneous force application at multiple points on the cutter 22.

Example 6

Referring to fig. 7, an embodiment 6 of the flying-cutter cutting device of the present invention is disclosed, which is similar to embodiment 1, and the differences are: the plurality of guides 30 are circumferentially offset around the axis of rotation of the drive. The arrangement mode not only solves the problem that a plurality of stress points of the cutter 22 are stressed simultaneously, but also can disperse the stress points of the cutter 22, and the service life of the cutter 22 is prolonged to the greatest extent.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims (13)

1. A fly cutting device, comprising:

a supporting base;

the cutter assembly comprises a cutter holder and a cutter, and one end of the cutter is fixed on the cutter holder;

a plurality of guides each having a cutting groove and a passage for passing the cut object, the cutter being capable of passing through the cutting groove of the guide, the plurality of guides being provided on the support base;

the tool apron is fixed on a rotating shaft of the driving device; the driving device drives the cutter assembly to rotate, so that the cutter penetrates through the cutting groove to cut the to-be-cut object in the corresponding channel in the rotating process.

2. The fly-cutting apparatus of claim 1,

the cutters of the cutter assembly are arranged along the rotating shaft of the driving device in the radial direction, and the plurality of guide pieces are arranged along the rotating shaft of the driving device in the radial direction.

3. The fly-cutting apparatus of claim 1,

the cutter component is arranged along the radial direction of the rotating shaft of the driving device, the cutter and the cutter holder form a certain included angle, and the included angle formed by the arrangement direction of the plurality of guiding parts and the cutter holder is the same as the included angle formed by the cutter and the cutter holder.

4. The fly-cutter cutting device of claim 1,

the plurality of guide members are arranged radially along the rotation axis of the driving device; or

The plurality of guide pieces are arranged at intervals in the circumferential direction around the rotating shaft of the driving device; or

The plurality of guide members are arranged in a circumferentially staggered manner around a rotating shaft of the driving device.

5. The fly-cutting apparatus of claim 1,

the fly cutter cutting device also comprises a first rotating ring, and the other end of the cutter is fixed on the first rotating ring; the first rotating ring is arranged outside the cutter assembly in a surrounding manner by taking a rotating shaft of the driving device as a center;

and the second rotating ring is driven by another driving device to drive the first rotating ring to rotate, so that the angular speed of the first rotating ring is the same as that of the cutter assembly.

6. The fly-cutter cutting device of claim 5,

the periphery of the first rotating ring is provided with gears in a surrounding manner, and the periphery of the second rotating ring is provided with gears in a surrounding manner; the first rotating ring and the second rotating ring are meshed through a gear, so that the second rotating ring drives the first rotating ring to rotate.

7. The fly-cutter cutting device of claim 5,

the supporting seat comprises a first fixing plate, a second fixing plate and a connecting plate, and the first fixing plate and the second fixing plate are oppositely arranged and connected through the connecting plate; the first fixing plate is provided with a rotating bracket, and the first rotating ring is connected with the first fixing plate through the rotating bracket and can rotate around the rotating bracket.

8. Fly-cutter cutting device according to any of claims 1 to 7,

the fly cutter cutting device further comprises a cooling device, the cooling device comprises a cooling box and a cooling medium, the cooling medium is arranged in the cooling box, and the cooling device is used for cooling the cutter.

9. Fly-cutter cutting device according to any of claims 1 to 7,

the fly cutter cutting device also comprises a traction device, and the traction device is used for drawing the pseudo-cutting object to pass through the channel; the guide interfaces with the traction device to facilitate the threading of the item of pseudo-cutting into the channel.

10. Fly-cutter cutting device according to any of claims 1 to 7,

the fly cutter cutting device is also provided with a detection device and a control device, the detection device is used for detecting the length of the cut article and feeding the length parameter back to the control device, the control device compares the length parameter with a set standard length parameter, and then the rotation speed of the driving device or the traction speed of the article to be cut is adjusted according to the comparison result, so that the length of the cut article is consistent with the set standard length parameter.

11. Fly-cutter cutting device according to any of claims 1 to 7,

the fly-cutter cutting device is characterized in that an alarm device is further arranged, the alarm device comprises an inductor, an alarm and a PLC (programmable logic controller), the inductor is used for detecting whether an article to be cut exists in front of the traction device and transmitting a signal that the article cannot be detected to the PLC, and the PLC controls the alarm to give an alarm according to the signal that the article cannot be detected.

12. Fly-cutter cutting device according to any of claims 1 to 7,

the fly cutter cutting device is further provided with an alarm device, the alarm device comprises an inductor, an alarm and a PLC (programmable logic controller), the inductor is used for detecting whether a to-be-cut object exists in front of the traction device and transmitting a detected original signal to the PLC, the PLC compares a threshold value of the original signal with a set threshold value, and the alarm is controlled to give an alarm according to a comparison result.

13. Fly-cutter cutting device according to any of claims 1 to 7,

the cutter is a non-stick cutter, a PTFE cutter or a ceramic cutter.

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