KR101585789B1 - Cutter with separation device and cutting method using the same - Google Patents

Abstract

Provided are a separation device, a cutter having the same, and a cutting method using the same. The separation device according to the present invention comprises: a wedge body which is inserted into a groove formed in an object and comes in contact with the object; a drive part which is connected to the wedge body to move the wedge body; and a separation part which is formed inside the wedge body and controls the separation distance of the groove by changing the thickness of the wedge body. Therefore, the present invention obtains a high-quality cut surface during a cutting work and improves the convenience of the cutting work.

Description

TECHNICAL FIELD [0001] The present invention relates to a separation device, a cutting device including the same, and a cutting method using the same.

The present invention relates to a cutting device which is inserted into and separated from a groove formed in an object, a cutter including the cutter for cutting an object, and a cutter which cuts the object while preventing the cutter blade from sticking to the cutout groove of the object To a cutting method.

A gas torch was used to cut a conventional metal plate, particularly a thick plate. When the metal plate is cut through the gas torch, the metal plate heated by the gas torch causes the oxidation reaction with oxygen, and the molten metal portion is generated in the portion heated by the oxidation reaction heat, and the molten metal portion flows downward by the gravity, Is used to cut the metal plate.

In this case, the molten metal flowing downward is formed at the lower part of the cut surface and the lower part of the metal plate and at the edge part, thus forming a cutting edge. This cutting theory inevitably occurs in the case of melt cutting. In addition, the melting method is slow in speed, and there is a problem of defective cutting surface due to impurities (inclusions) in the metal and poor flatness due to thermal deformation.

Particularly, the thicker the thickness of the metal plate or the thick plate, the more heat is required. Therefore, it is difficult to secure a clean cross-section, which causes a problem that the metal plate or the thick plate is cut to form a billet.

Thus, as shown in Fig. 1, a technique of cutting the object 1 by connecting a circular cutting blade 4 to the shaft of the motor 4 has been proposed. That is, a circular cutting blade 4, which is fixed to an output shaft of a speed reducer (not shown) for reducing the number of revolutions of the motor 4 and cuts the object 1 such as a metal plate or a heavy plate, (1).

In order to cut an object in this way, it is necessary to separate the initially formed groove from the object by the cutting edge so that the cutting edge can move smoothly in the conveying direction. Otherwise, as shown in FIG. 1, the circular cutting blade 3 is caught or interfered between the grooves formed in the object 1 in the course of the rotation, the sectional shape of the cut surface is not clean, . ≪ / RTI >

Therefore, a cutting groove separating device of a metal plate as in Patent Document 1 has been proposed. 2, a wedge 5 is inserted into a groove formed by a circular cutting blade 3 for cutting the object 1, and the wedge 5 is inserted in the widthwise direction of the object 1 And a second cylinder member (7) for moving the wedge in the longitudinal direction of the object, wherein the first cylinder member (6) is movable through the first and second cylinder members (6, 7) So as to separate the incision grooves formed in the object 1.

3 (a), the second cylinder member 7 is extended to insert the wedge 5 into the incision groove 2 of the object 1, and the inserted wedge 5 is lifted And shrinks the first cylinder member 6 to separate the incision groove 2 from the incision groove 2. The wedge 5 is raised in a state as shown in FIG. 3 (b) by increasing the shrinkage amount of the first cylinder member 6 as the cutting edge 3 gradually moves in the longitudinal direction of the object 1, The first cylinder member 6 is contracted to a state as shown in FIG. 3 (c) so as to further increase the amount of the wedge 5 to be spaced apart from the incision groove 2.

Alternatively, as shown in Fig. 4, the striking member 8 is inserted into the incision groove 2 and the striking groove 2 formed on the object 1 is struck by hitting the rear end of the striking member with the striking means 9 Have been proposed.

However, with such conventional techniques, in order to separate the cut-away grooves of the object, the main equipment is enlarged and the number of required parts or devices is large, so that interference with other equipment frequently occurs. It goes without saying that the cost for manufacturing a large number of parts or devices increases together. In addition, there is a problem in that when the cutting groove is spaced apart in a striking manner, the cut surface of the object is damaged and it is difficult to obtain a good cutting surface.

KR 10-0533809 B1

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a cutting surface with good quality at the time of cutting operation and to improve the convenience of cutting operation and to reduce the cost thereof.

Specifically, it is an object of the present invention to improve the quality of the cut surface by preventing the cutting edge from being separated from the cut groove formed in the cut target.

At this time, it is an object of the present invention to simplify the parts or devices necessary for separating the cutting grooves of the object to be cut, thereby improving the convenience of the cutting operation.

Thus, it is an object of the present invention to contribute to reducing the cost of the cutting operation and reducing the manufacturing cost of the finally produced product.

In order to accomplish the above object, the present invention provides a cutting apparatus, a cutting machine including the same, and a cutting method using the same.

A separation unit according to a preferred embodiment of the present invention includes a wedge body inserted into a groove formed in an object and contacting an object, a driving unit connected to the wedge body and moving the wedge body, And a spacing part provided in the wedge body to adjust a distance between the wedges by varying the thickness of the wedge body.

Preferably, the wedge body includes: a receiving space formed in a height direction inside and having an opening opened at an upper portion thereof; a supply channel formed inside the wedge body to supply fluid to the receiving space; And a connection groove connected to the driving unit.

More preferably, the spacing portion includes a spacing member which is provided so as to be in contact with the object through the opening of the accommodating space and to be raised or lowered in the accommodating space, And an elastic member for retracting the separating member when it is stretched.

More preferably, the spacing member is adjusted in height by a fluid supplied from the supply passage, and the distance between the grooves is increased by an elevation height, and the spacing distance of the grooves is maintained by hydraulic pressure.

More preferably, the spacing member may include a buffer member provided at an end portion contacting the object, the buffer member being made of a buffer material.

Preferably, the driving unit is provided with a cylinder member, and the piston rod is connected to the wedge body to move the wedge body in the longitudinal direction of the groove.

Preferably, the wedge body includes an inclined surface having an inclined surface on which the opening of the accommodation space is formed, and the inclined surface may be formed in multiple stages so as to change the wedge angle.

More preferably, the wedge body may include a stopper protruding at a predetermined height from a surface of the spacer that contacts the object.

According to another aspect of the present invention, there is provided an image forming apparatus including a device frame, a supply unit for supplying an object on the device frame, a cutting unit installed on the device frame for cutting the supplied object, And a separator installed in the apparatus frame, the separator being inserted into the groove of the object formed by the cutter.

According to another aspect of the present invention, there is provided a cutting method for cutting an object to prevent a cutting edge from being bitten, comprising: a feeding step of feeding an object to a cutting machine; a cutting step of cutting the object by moving a cutting blade provided on the cutting machine; And a separating step of inserting a wedge body into a groove formed in the object by the cutting edge during the cutting step to separate the groove formed in the object, wherein the separating step separates the groove formed in the object Thereby increasing the thickness of the wedge body.

Preferably, the spacing step is performed together during the cutting step, and the thickness of the wedge body may be increased stepwise according to the length of the object cut by the movement of the cutting edge.

According to the spacing apparatus, the cutter including the same, and the cutting method using the same according to the preferred embodiment of the present invention, it is possible to obtain a good cut surface of the object to be cut at the time of cutting operation.

Concretely, it is possible to prevent the cutting edge from being separated from the cutting groove of the object to be cut so that the cutting edge is prevented from being caught in the cutting groove, thereby obtaining not only good cutting quality but also abrasion and damage of the cutting device including the cutting blade .

In addition, since the cutout grooves can be efficiently separated by the minimum number of parts, the apparatus can be simplified, interference with other apparatuses can be prevented, and the manufacturing cost of the apparatus can be reduced.

Accordingly, it is possible to reduce the manufacturing cost of the final product and increase the efficiency of the entire product production process.

Figure 1 schematically shows a conventional cutting operation.
Fig. 2 schematically shows a cutting operation using a conventional separating device.
Fig. 3 schematically shows the operation of a conventional separation device.
Fig. 4 schematically shows a cutting operation using another conventional spacing device.
5 is a perspective view of a spacing device according to a preferred embodiment of the present invention.
6 is a schematic view illustrating an internal structure of a wedge body according to a preferred embodiment of the present invention.
Figure 7 schematically illustrates the operation of the isolator in one preferred embodiment of the present invention.
8 is a schematic view illustrating another embodiment of the wedge body according to the preferred embodiment of the present invention.
FIG. 9 is a view showing the number of parts required for a separation apparatus according to a preferred embodiment of the present invention and a separation apparatus according to the prior art.
10 is a schematic view of a cutter according to a preferred embodiment of the present invention.
FIG. 11 shows a procedure of a cutting method according to a preferred embodiment of the present invention.
12 shows a step of separating a cutting method according to a preferred embodiment of the present invention.

In order to facilitate an understanding of the description of the embodiments of the present invention, elements denoted by the same reference numerals in the accompanying drawings are the same element, and among the constituent elements that perform the same function in each embodiment, Respectively.

Further, in order to clarify the gist of the present invention, a description of elements and techniques well known in the prior art will be omitted, and the present invention will be described in detail with reference to the accompanying drawings.

It is to be understood, however, that the spirit and scope of the present invention are not limited to the embodiments shown, but may be suggested by those skilled in the art in other forms, additions, or alternatives, .

First, the separating device according to the present invention is inserted into a cutting groove formed in a cutting object by a cutting blade, for example, to prevent the cutting edge from being caught or stuck on an object by separating the cutting groove, So as to obtain a good cut surface.

In order to achieve the above object, the present invention provides a wedge body 10 inserted into a groove formed in an object and having a bottom surface 15 contacting an object, and a wedge body 10 connected to the wedge body 10 A driving part 20 for moving the wedge body and a spacing part provided inside the wedge body 10 to adjust a distance between the wedge body and the wedge body to change the thickness of the wedge body .

The tip of the wedge body 10 is provided with an inclined surface 14 forming a predetermined inclination to facilitate insertion into the incision groove formed in the object and to form a constant wedge angle when inserted into the incision groove.

The driving unit 20 is connected to the rear end of the wedge body 10. The driving part may be provided as a cylinder member 21 provided with a cylinder body 21b and a piston rod 21a and the end of the piston rod 21a is connected to the rear end of the wedge body 10, The wedge body 10 can be moved by elongation or contraction of the rod. A plurality of supply lines 40 connected to fluid supply means (not shown) for supplying a fluid from the outside are installed in the drive unit 20 so that the piston rod 21a is extended Or a driving force capable of contracting. At this time, the fluid to be used is not limited to the type that does not interfere with the operator and the working environment, and this can be appropriately selected by those skilled in the art.

The wedge body 10 may also be provided with a supply line 40 connected to the fluid supply means (not shown) to supply fluid into the wedge body. The fluid supplied into the wedge body 10 provides a driving force necessary for the wedge body 10 to separate the incision groove of the object.

Referring to FIG. 6, the inner structure of the wedge body 10 will be described in more detail. A connection groove 13 is formed at a rear end of the wedge body 10, to which the driving unit 20 is connected, Respectively.

A hollow portion is formed in the thickness direction of the wedge body 10, and the hollow portion is provided in the receiving space 11. [ Then, the upper portion of the accommodation space 11 is opened and provided with an opening 11a communicating with the outside. In addition, as described above, the supply line 40 connected to the fluid supply means is connected to the upper portion, and the supply flow path 12 through which the fluid transferred from the supply line flows may be formed. The supply passage 12 is a passage through which the fluid supplied from the supply line 40 can move to the accommodation space 11. [

The wedge body 10 having the above-described structure is provided with a spacing part 30 for adjusting the distance of the cutout groove formed in the object by changing the thickness of the wedge body. The spacing portion 30 includes a spacing member 31 which contacts the object through the opening 11a of the accommodation space 11 and is provided to rise or fall in the accommodation space 11, 11 and may be provided as an elastic member 32 for lowering the spacing member 31 when the spacing member 31 is extended and then expanded.

The thickness of the wedge body 10 described above means the distance from the bottom surface 15 of the wedge body 10 to the surface where the spacing member 31 contacts the object, The separating portion 30 including the separating portion 31 will be described in detail.

The spacing member 31 is lifted by the fluid supplied into the accommodation space 11 along the supply flow path 12 and adjusts the amount of the supplied fluid to raise the spacing member 31 stepwise And the height of the spacing member 31 can be adjusted.

At this time, the end of the spacing member 31 can be separated from the wedge body 10 through the opening 11a of the receiving space 11, and is also a portion that is exposed to the outside through the opening 11a and contacts the object Do. Since the upper end portion of the spacing member 31 is a portion directly contacting the cut surface of the object to separate the cut-away groove formed in the object, the buffer member 31a provided at the upper end portion is made of a buffer material, It may be desirable not to damage it. In addition, any material may be used as long as the material of the cushioning member 31a can satisfy the object of installing the cushioning member 31a.

The lower end of the spacer member 31 is larger than the upper end of the buffer member 31a and is larger than the opening 11a of the accommodation space 11 so that the accommodation space 11 of the wedge body 10 As shown in Fig. And is also a portion directly in contact with the fluid supplied to the accommodation space 11 through the supply flow path 12. In order to prevent the supplied fluid from leaking to the outside of the accommodation space 11, And preferably, an ordinary O-ring can be used.

The fluid is supplied from the supply line 40 and the supplied fluid reaches the accommodation space 11 through the supply flow path 12. When the fluid is continuously supplied, the fluid accumulates in the accommodation space 11, The member 31 pushes the lower end portion toward the upper part of the accommodation space 11. The elastic member 32 provided on the upper surface of the lower end portion of the spacing member 31 gradually contracts and the upper end of the spacing member 31 provided with the buffer member 31a is exposed to the outside through the opening 11a, And the cutting groove is spaced apart.

In this case, by adjusting the amount of the supplied fluid in consideration of the progress of the cutting edge of the cutter or the progress of the cutting operation, the spacing member 31 may be stepped up or the height of the spacing member 31 may be increased Or the current elevation height can be maintained. When it is not necessary to separate the cutting grooves of the object after the cutting operation is completed, when the fluid supply is stopped and fluid accumulated in the accommodation space 11 is removed, the elastic member 32 is stretched again, (31) can be lowered. At this time, in addition to the supply passage 12, a suction passage (not shown) for effectively removing the fluid inside the accommodation space 11 may be additionally provided, or a suction means or fluid for sucking the fluid inside the accommodation space 11 If the discharge port (not shown) is additionally provided, the lowering operation of the spacing member 31 can be performed more easily.

In addition, a stopper 16 may be provided on the wedge body 10 so as to protrude at a predetermined height from the surface where the spacer 31 contacts the object. It is preferable that the stopper is disposed in the periphery of the opening 11a and is disposed at a position not far from the upper end of the spacing member 31. [ When the wedge body 10 is inserted into the incision groove 2 formed in the object, the wedge body 10 is prevented from proceeding further into the incision groove 2, So that the incision groove 2 can be separated while being in contact with the object. When the wedge body 10 is inserted into the incision groove 2 of the object while the piston rod 21a of the cylinder member 21 is extended, when the stopper 16 contacts the object, The elongation of the rod can be stopped so that the wedge body 10 can no longer enter the incision groove 2.

Hereinafter, the separating operation of the separating apparatus 100 according to the configuration described with reference to Fig. 7 will be described in detail.

7A shows a state in which an object 1 is cut by a rotating cutting blade 3 connected to a speed reducer (not shown) connected to a rotary shaft of the motor 4 and cutting the object 1. When the incision groove 2 is formed in the object 1 by the cutting edge 3 at the beginning of the cutting operation, the bottom surface of the wedge body 10 is inserted into the cutout groove 3 in order to insert the wedge body 10 into the incision groove, 1, and then the piston rod 21a of the cylinder member 21 provided as the driving portion is extended. When the stopper 16 of the wedge body 10 comes into contact with the object 1, the extension of the piston rod is stopped.

7 (b) and the incision groove 2 is enlarged, the wedge body 10 increases its thickness to increase the critical angle of the wedge, and as a result, The incision grooves 2 can be spaced apart without difficulty. That is, if the fluid is supplied through the supply line 40 and the fluid can flow into the accommodation space 11 through the supply flow path 12, the fluid flowing into the lower end of the spacer member 31 can be separated from the spacer member 31 ). Then, the upper end of the spacing member 31 is raised through the opening 11a to come into contact with the object 1. [ When the spacing member 31 is elevated to an appropriate height, it is possible to maintain the elevation height of the spacing member 31 by maintaining the amount of the fluid that has already been supplied without supplying further fluid.

When the cutting operation continues and the cutting edge 3 advances to the position of FIG. 7 (c) so that the cutting operation enters the terminal period, the wedge body 10 needs to maximally increase the wedge critical angle. Therefore, by increasing the supply amount of the fluid by the above-described method and further increasing the height of the spacing member 31, the widening cut groove 2 can be separated by a larger force.

The thickness of the wedge body 10 can be appropriately selected in consideration of the kind of the object to be cut or the characteristic of the cutting operation in the method of separating the cutout groove 2 as described above. That is, this is for determining the height of the spacing member 31 provided in the wedge body 10 in the thickness direction of the wedge body. When the wedge body 10 is provided with a higher thickness and the height of the spacing member 31 accommodated therein is also increased when the spacing load is to be increased by further increasing the wedge critical angle due to the nature of the cutting operation, It is possible to sufficiently secure a distance at which the movable member 31 can ascend. In this case where the thickness of the wedge body 10 and the height of the spacing member 31 are raised together, the size of the elastic member 32 provided inside the accommodation space 11 may be differently applied. In addition, when the elastic member 32 is contracted in the accommodation space 11, the spacing member 31 can not be lifted by the area of the elastic member, ) May be provided as a hydraulic or pneumatic system to maximize the amount of lift of the spacing member 31. In particular, when the length of the object 1 is 5,000 mm or more, it may be preferable to implement a hydraulic or pneumatic system .

8, in order to facilitate insertion of the object 1 of the wedge body 10 into the incision groove 2 and to vary the wedge angle, the inclination of the inclined face of the wedge body 10 (14) may be formed in multiple stages.

The main components of the separating device 100 include a cylinder member 21 provided as a driving unit and a separating member 31 and an elastic member 32 provided inside the wedge body 10, Is enough. Therefore, as shown in FIG. 9, the number of the detailed parts (A) 9 necessary for constructing the separating device according to the preferred embodiment of the present invention, the number of detailed parts required to construct the separating device by the conventional hitting means and the striking member B) of 13 and the number of detailed parts (C) required to constitute the separating device by the conventional first and second cylinder members, the number of parts required to construct the separating device according to the present invention is remarkably small.

On the other hand, the present invention as another aspect provides a cutter including the spacing device provided as above, which is shown in Fig. A cutter according to an exemplary embodiment of the present invention includes a device frame 200, a supply unit 300 installed on the device frame to supply an object 1 to be cut, The cutter 400 cutting the object 1 and the separator 100 inserted in the cutout groove D of the object 1 formed on the apparatus frame by the cutter .

The supply unit 300 includes a supply member 310 for pushing the object 1 to the apparatus frame 200, a supply frame 320 for holding the supply object 310 and supporting the object 1, And a feed roller 330 continuously installed on the frame 320 and the apparatus frame 200. At this time, the supply member 310 may be provided with a cylinder member, which preferably includes a cylinder body and a piston rod, which is suitably changeable by a person skilled in the art.

The cutter 400 includes a cutter frame 410 fixed to the apparatus frame 200, a motor 420 connected to the cutter frame, and a speed reducer (not shown) And includes a cutting edge 430. The motor 420 and the cutting blade 430 are provided to cut the object 1 while moving along the cutting frame 410. The cutting blade 430 cuts the object 1 The object 1 can be cut in the form of the cut material 1a and transferred on the apparatus frame 200 for the next process.

The wedge body 10 of the separating device 100 is inserted into the cutout groove D by the previously described method and the cut wedge body D is inserted into the cutout groove D, The spacing member D can be raised to an appropriate height according to the conveyance of the blade 430 and the progress of the cutting operation.

Hereinafter, the spacing device as described above with reference to Figs. 11 and 12, a cutter including the same, and a cutting method using the same will be described.

As a method for cutting the object to prevent the cutting edge from being bitten, there are a feeding step (S100) for feeding the object to the cutter, a cutting step (S200) for cutting the object by moving the cutting edge provided on the cutter, And separating the wedge body from the groove formed in the object by inserting a wedge body into the groove formed in the object by the cutting edge (S300).

Specifically, the separation step S300 may be performed by increasing the thickness of the wedge body so as to separate the groove formed in the object. Specifically, the separation step S300 may include a step of moving the wedge body, A second separation step S310 of extending the piston rod to insert the end of the wedge body into the incision groove and contacting the bottom surface of the wedge body with an object, And a third spacing step (S330) of spacing the groove formed in the object by increasing the thickness of the wedge body by supplying fluid to the wedge body.

Particularly, after completion of the second separation step S320, a fluid is supplied to the wedge body so as to separate the groove formed in the object, and a third separation step of increasing the thickness of the wedge body by adjusting the amount of fluid to be supplied (S330) can be performed. However, whether or not the first separation step S310 and the second separation step S320 are performed in the separation step S300 may be appropriately selected by a person skilled in the art and is not limited by the present invention .

In the third separation step S330, the fluid may be supplied to the wedge body, and the amount of the supplied fluid may be adjusted to increase the thickness of the wedge body, thereby separating the incision groove. In particular, the third spacing step S330 may be performed while the cutting step S200 is performed, wherein the thickness of the wedge body is increased stepwise according to the length of the object cut by the movement of the cutting edge The spacing amount and the spacing load can be appropriately adjusted according to the progress of the cutting operation.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be apparent to those of ordinary skill in the art.

1: Object 1a: Cutting material
2: incision groove 3: cutting blade
4: motor 5: wedge
6: first cylinder member 7: second cylinder member
8: striking member 9: striking means
10: wedge body 11: accommodation space
11a: opening 12:
13: connection groove 16: stopper
20: drive unit 21: cylinder member
30: spacing member 31: spacing member
31a: buffer member 32: elastic member
40: supply line 100:
200: apparatus frame 300:
310: feeding member 320: feeding frame
330: feed roller 400:
410: Cutting frame 420: Motor
430: cutting blade

Claims (11)

A wedge body inserted into a groove formed in an object and contacting the object;
A driving unit connected to the wedge body to move the wedge body; And
A spacing portion provided in the wedge body to adjust a distance between the wedges by changing a thickness of the wedge body;
And a plurality of spacers.
The method according to claim 1,
The wedge body
A receiving space formed in the inside and having an opening with an open top;
A supply passage connected to the accommodation space and formed therein to supply the fluid; And
A connection groove connected to the driving unit;
And an output terminal for outputting the output signal.
The apparatus according to claim 2,
A spacing member which is brought into contact with the object through the opening of the accommodation space and is provided to rise or fall in the accommodation space;
An elastic member provided within the accommodation space and contracted by the rising of the spacing member and lowering the spacing member during extension;
And a plurality of spacers.
The method of claim 3,
Wherein the spacing member comprises:
The elevation height is adjusted by the fluid supplied from the supply passage,
Wherein the distance between the grooves is increased by an elevation height, and the distance between the grooves is maintained by the hydraulic pressure.
The method of claim 3,
Wherein the spacing member comprises:
A cushioning member provided at an end portion contacting the object, the cushioning member being made of a buffer material;
And a plurality of spacers.
The driving apparatus according to claim 1,
A cylinder member,
And a piston rod is connected to the wedge body to move the wedge body in the longitudinal direction of the groove.
The wedge body according to claim 2,
And an inclined surface on which an opening of the accommodating space is formed is inclined,
And the inclined surface is formed in a multi-stage so as to change a wedge angle.
4. The apparatus of claim 3, wherein the wedge body comprises:
A stopper protruding at a predetermined height from a surface of the spacer in contact with the object;
And a plurality of spacers.
Device frame;
A supply unit for supplying an object on the apparatus frame;
A cutting unit installed in the apparatus frame and cutting the supplied object; And
The cutter according to any one of claims 1 to 8, which is installed in the apparatus frame and inserted into the groove of the object formed by the cut-out portion.
As a method of cutting the object to prevent the cutting edge from being bitten,
A supply step of supplying an object to the cutter;
A cutting step of cutting an object by moving a cutting blade provided on the cutter; And
And separating the wedge body from the groove formed in the object by inserting a wedge body into the groove formed in the object by the cutting edge during the cutting step,
Wherein the separating step comprises:
And increasing the thickness of the wedge body so as to separate the groove formed in the object.
11. The method of claim 10,
Wherein the separating step comprises:
Wherein the thickness of the wedge body is increased stepwise in accordance with the length of the object cut by the movement of the cutting edge while the cutting step is performed.

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