JP6238402B2 - Sheet material cutting apparatus and method - Google Patents

Description

  The present invention relates to a sheet material cutting apparatus and a cutting method for cutting a sheet material sucked and held on a suction table into a desired shape by a cutting blade.

  Conventionally, sheet materials used for various clothing and the like are stacked on a cutting table and sucked and held, and while moving a cutting head horizontally arranged on the cutting table according to a pre-designed cutting pattern, 2. Description of the Related Art A sheet material cutting apparatus that cuts the sheet material into a desired shape by reciprocating a cutting blade provided on the cutting head up and down is known.

  When cutting the sheet material, the sheet material cutting device lowers the cutting blade into the bristles on the cutting table by a cutting blade lifting mechanism provided on the cutting head when cutting the sheet material, and penetrates the sheet material. In this state, the cutting blade is reciprocated up and down to cut the sheet material. The cutting blade is configured to be rotatable so as to be cut in various directions.

  In addition, the sheet material is subjected to various markings for each cutting part that is combined to sew various clothing items. Examples of the marking include perforation using a perforation drill, V notch, Λ notch, and other I notch (cutting).

  By the way, in the cutting of the sheet material, the movement of the cutting blade is controlled in accordance with a cutting pattern designed in advance in a desired shape by CAD or the like. This is done without considering the Λ notch. That is, the angle control of the cutting blade, the piercing of the cutting blade into the sheet material, and the control of the amount of movement of the cutting blade are performed in the same manner as a curve or a straight line (including a corner).

  As a cutting method as described above, without cutting the cutting blade from the sheet material, the cutting blade is advanced along the cutting line and the cutting blade is rotated in the cutting direction at the corner, and then the cutting blade is moved in the cutting direction. It is known to perform cutting by moving forward (for example, Patent Document 1).

Japanese Patent Publication No.51-12120

  The method disclosed in Patent Document 1 is such that when the cutting blade reaches the corner of the planned cutting line while reciprocating the cutting blade up and down with the cutting blade penetrating the sheet material, Since the sheet material is cut by rotating the cutting material, the cutting line is protruded to the outside of the cutting part or by the corner of the cutting line due to the sheet material coming together with the turning of the cutting blade. There is a problem of cutting with a rounded vertex. That is, there is a problem that corners (particularly acute corners) of the cut parts cannot be cut sharply.

  Therefore, when cutting a sharp corner of the cutting part as the second method, the sheet material is first cut while the cutting blade is reciprocated up and down with the cutting blade penetrating the sheet material. The cutting blade is pulled out from the sheet material at the time when the cutting edge of the cutting blade slightly exceeds the apex of the corner portion. Subsequently, the cutting blade is rotated in the direction of the second cutting line, and the cutting blade penetrates the sheet material along the second cutting line while reciprocating up and down again. The sheet material is cut in the direction of the second cutting line while reciprocating up and down.

  However, in any of the above methods, V notches and acute corners are cut without considering V notches and Λ notches (hereinafter simply referred to as V notches).

  Hereinafter, based on FIGS. 10A to 10D, a cutting method for cutting the V notch by the second conventional method will be described. The V notch is formed with a notch width of 3 mm and a notch depth of 1.5 mm, for example, and the cutting blade is formed with a thickness of about 1.6 mm and a width of about 8 mm.

  In FIG. 10A, the cutting blade 32 reciprocates up and down while cutting the straight portion in the first cutting planned line direction while penetrating the sheet material 30, and the cutting blade 32 corresponds to the V notch 31. After reaching the corner portion, the cutting blade 32 has exceeded a predetermined amount from the corner portion. Since the control unit recognizes that it is the same as the corner of the normal cutting pattern, not the individual recognition as the V notch 31 in the cutting pattern, the same as the cutting of the corner In addition, the cutting is stopped in a state where a part of the corner is excessively passed, and the cutting blade 32 is pulled out from the sheet material 30.

  As shown in FIG. 10B, the cutting blade 32 is rotated and directed in the direction of the next second cutting line 34, and the cutting blade 32 descends while reciprocating up and down, and penetrates the sheet material 30 again. In addition, the position where the cutting blade 32 penetrates is located at a position where the rear end position of the cutting blade 32 protrudes from the corner by a predetermined amount.

  Next, as shown in FIG. 10C, the cutting blade 32 is pulled out of the sheet material 30 and rotated, and the cutting edge of the cutting blade 32 is directed to the next third cutting scheduled line 35. 10B, the rear end position of the cutting blade 32 is located at a position protruding a predetermined amount from the corner, and the cutting blade 32 penetrates the sheet material 30 while reciprocating up and down.

  As shown in FIG. 10D, the cutting blade 32 is pulled out of the sheet material 30 and rotated, and the cutting edge of the cutting blade 32 is directed to the next fourth cutting scheduled line 36. Thereafter, the rear end position of the cutting blade 32 is located at a position protruding from the corner by a predetermined amount, and the cutting blade 32 penetrates the sheet material 30 while reciprocating up and down to cut the V notch 31. .

  In FIGS. 10A to 10D, the cutting line at the cutting blade 32 is drawn. However, this is drawn for convenience so that it can be easily understood. Since 32 has a width | variety, the sheet | seat material 30 will be displaced or it will be in the state where the cutting line was crushed by being pulled.

  In this way, when the V notch is cut by applying the sharp corner cutting method, the cutting blade is large with respect to the V notch, and the sheet material is cut in an overlapping manner. There is a problem in that the shape of the V-notch collapses and can no longer serve as a notch.

  That is, in the conventional cutting method, the V notch and the acute angle direction are cut by the same method, so that the V notch cannot be recognized, or the cutting vertex of the sheet material becomes round and sharp when cutting in the acute angle direction. There was a problem that could not be formed.

  As described above, the conventional sheet material cutting apparatus cuts all corners with the cutting blade continuously penetrating the sheet material without judging the V notch, or at the corner without judging the V notch. While cutting the cutting blade from the sheet material, the sheet material is cut by overlapping a part of the planned cutting line.

  In addition, instead of the first and second methods described above, it may be possible to manually recognize and specify the V-notch, but the V-notch is formed from several tens to several hundreds depending on the intended use. Therefore, manual designation has a problem that it takes a lot of time, and there is a problem that the V notch is not cut with high accuracy due to a designation mistake.

  Accordingly, an object of the present invention is to form a V-notch with high accuracy and sharpen the cutting apex of the sheet material when cutting an acute corner.

Accordingly, the invention of claim 1 holds the sheet material on the cutting table by suction, and moves the cutting head along a pre-designed cutting pattern while reciprocating the cutting blade provided in the cutting head up and down. In the sheet material cutting device for cutting the sheet material into a desired shape by
A control unit for recognizing a cutting angle and a cutting line segment length formed by a cutting planned line from the cutting pattern;
The control section compares the cutting angle and the cutting line segment length with the cutting angle and cutting line segment length set in advance as a notch, and the cutting angle and the cutting line segment length are set in advance. The sheet material cutting device adopts a configuration in which the notch is determined to be a notch when equal to the length, and the notch cutting control is performed at the time of cutting.

  The invention according to claim 2 is the sheet material cutting device according to claim 1, wherein the notch is a V notch and / or a Λ notch.

  Further, in the invention of claim 3, the notch cutting control adopts a configuration in which the cutting blade is cut while rotating the cutting blade according to the shape of the notch while the cutting blade is penetrating through the sheet material. The sheet | seat material cutting apparatus as described in 1 above.

  In the invention according to claim 4, when the cutting section cuts an acute angle cutting pattern other than the notch, the control section cuts the first cutting planned line, and then pulls the cutting blade out of the sheet material to perform the second cutting schedule. The sheet according to any one of claims 1 to 3, wherein the cutting blade is rotated in the line direction, and then the cutting blade is again passed through the sheet material to control the movement of the cutting blade in the second cutting line direction. This is a material cutting device.

According to the invention of claim 5, the sheet material sucked and held on the cutting table is moved along the cutting pattern inputted in advance while the cutting blade provided in the cutting head is reciprocated up and down. In the sheet material cutting method of cutting the sheet material into a desired shape,
Analyzing the cutting pattern;
Calculating a distance and an angle between points on the cutting line from the cutting pattern;
Determining whether the cutting line corresponds to a corner based on the distance and angle between points on the cutting line ;
When the cutting line is determined to be a corner, determining whether the corner corresponds to a notch;
If the corner is determined to be a notch, storing the position of the notch as a notch position ;
Performing notch cutting control at the notch position;
This is a sheet material cutting method that employs a configuration including:

  The invention according to claim 6 is the sheet material cutting method according to claim 5, wherein the notch is a V notch and / or a Λ notch.

Further, in the invention of claim 7, after the step of determining whether or not the corner corresponds to a notch, and when the configuration angle of the corner in the corner other than the notch is 90 ° or less, 7. The sheet material cutting method according to claim 5, wherein the sheet material is determined to be an acute angle cutting position and the cutting control is performed at the acute angle cutting position. 8.

Further, in the invention according to claim 8, the cutting control at the acute angle cutting position is performed by moving the cutting blade along the first cutting line direction in a state where the cutting blade penetrates the sheet material when cutting the sheet material. After cutting to a position slightly exceeding, the cutting blade is pulled out from the sheet material, the cutting blade is rotated in the second cutting line direction, and then the rear end of the cutting blade slightly protrudes outward from the corner. 8. The sheet material cutting method according to claim 7, wherein a configuration is adopted in which the cutting blade is passed through the position and cut in the second cutting line direction.

  According to the present invention, the V-notch portion is detected in advance from the cutting pattern, and cutting control suitable for cutting the V-notch portion is performed in the V-notch portion, so that an accurate V-notch shape can be reproduced. Further, even a small V notch can be cut with a minimal influence of the thickness and width of the cutting blade, so that an accurate V notch shape can be reproduced.

  Further, according to the present invention, when cutting the V-notch, the cutting blade can be cut through the sheet material without being pulled out from the sheet material, and an accurate V-notch shape can be reproduced. Further, even a small V notch can be cut with a minimal influence of the thickness and width of the cutting blade, so that an accurate V notch shape can be reproduced.

  Further, according to the present invention, when the V notch is cut, cutting control suitable for the V notch is performed, and when cutting a cutting pattern with sharp corners, the cutting blade is once pulled out of the sheet material. Since it is cut again in the second direction after being moved, the cutting of the V notch and the acute corner is performed in an optimum state, and cutting with high accuracy can be performed.

  Further, according to the present invention, the V notch can be automatically recognized and cutting suitable for the V notch can be performed, so that there is no need to specify one V notch one by one and no V notch designation error occurs. Can be cut with high accuracy.

FIG. 2 is an overall perspective view of a sheet material cutting device. These are the block diagrams of the control part of the sheet | seat material cutting device of this invention. These are explanatory drawings showing one Embodiment of the cutting pattern of the sheet material to be cut. These are expansion explanatory drawings of the V notch part in the cutting pattern of the sheet material to be cut. These are the operation | movement flowcharts in 1st Embodiment of the sheet material cutting device of this invention. These are explanatory drawings showing the cutting state at the time of cutting a V notch part with the sheet | seat material cutting apparatus of this invention. These are explanatory drawings showing the cutting state at the time of cutting an acute angle pattern with the sheet | seat material cutting apparatus of this invention. These are the operation | movement flowcharts in 2nd Embodiment of the sheet material cutting device of this invention. These are explanatory drawings showing another cutting state at the time of cutting a V notch part with the sheet | seat material cutting apparatus of this invention. These are explanatory drawings showing the cutting method in the V notch part of the sheet material cut with the conventional sheet material cutting apparatus.

  The sheet material cutting device of the present invention will be described below with reference to FIGS.

  FIG. 1 is an overall perspective view showing an embodiment of a sheet material cutting device 1 of the present invention. In FIG. 1, the operation computer is not shown.

  The sheet cutting apparatus 1 includes a cutting table 2 formed of a plurality of bristle blocks spread on the upper surface of the machine frame, a Y beam 3 suspended on the cutting table 2 and movable in the X direction, and the Y beam 3 A cutting head 5 that can freely move in the Y direction along with the cutting table 2, the Y beam 3, the cutting head 5, and the like is provided.

  The cutting table 2 includes a vacuum source (not shown) that sucks and holds the sheet material 7 laminated on the upper surface of the cutting table 2 by sucking from below the bristles. The cutting table 2 is configured as an endless belt conveyor that can be transported and rotated in the X direction, and carries the sheet material 7 onto and from the bristles. The cutting table 2 into which the sheet material 7 is loaded is entirely covered with a vinyl sheet 8 so that air sucked from the periphery thereof does not leak (a part of the vinyl sheet 8 is cut away for easy understanding). )

  The Y beam 3 is suspended along the Y direction on the cutting table 2 and is movable in the X direction by an appropriate drive source (not shown). A rail 4 is laid along the Y beam 3 on the Y beam 3, and a cutting head 5 is provided on the rail 4.

  As shown in FIG. 2, the sheet material cutting apparatus 1 includes a control unit 14, and a pattern input unit 15 for inputting data of the cutting pattern 7 and various commands for other operations are input to the control unit 14. The input unit 16 is connected. The control unit 14 is connected to a cutting head 5 for cutting the sheet material 7 in accordance with the data of the cutting pattern 7 input from the pattern input unit 15 and the command input from the input unit 16.

  The cutting head 5 is slidably fitted to the rail 4 and is moved in the Y direction on the Y beam 3 by a driving source (not shown). The cutting head 5 is provided with a cutting blade 6. The cutting blade 6 is retracted to the upper side of the sheet material 7, and a cutting position for allowing the cutting blade 6 to pass through the sheet material 7 and the bristles. Is moved up and down by a drive source (not shown). The cutting blade 6 cuts the sheet material 7 by moving the cutting head 5 while reciprocating up and down at a high speed at the cutting position. Further, the cutting blade 6 is rotatable about an axis near the center of the cutting blade 6 by a drive source (not shown).

  The cutting head 5 is driven in accordance with a cutting head control command output from the control unit 14 and cuts the sheet material 7 into a shape of a cutting pattern 10 designed in advance.

  FIG. 3 shows an embodiment of a cutting pattern 10 cut by the sheet material cutting apparatus 1 of the present invention. In the cutting pattern 10, sewing parts such as clothes are designed using a CAD or the like. By inputting the data of the cutting pattern 10 from the pattern input unit 15, a control command is sent to the cutting head 5. The sheet material 7 is cut into the shape of the cutting pattern 10 by being sent.

  The cutting pattern 10 is subjected to various markings for combining parts in a subsequent sewing process or the like. In the present embodiment, for example, a V notch 11 (including Λ notch in the following description), an I notch (cut) 12 and a perforation 13 are provided. The V notch 11, I notch 12, and perforation 13 are properly used depending on the type of fabric used and whether or not it should be noticeable after the tailoring.

  FIG. 4 is an enlarged explanatory view of the V notch 11 part. As shown in the figure, the V-notch 11 is formed of a first cutting planned line 17, a second cutting planned line 18, a third cutting planned line 19, and a fourth cutting planned line 20. The first cutting planned line 17 and the second cutting planned line 18 form an angle θ1 (the angle that rotates the cutting blade 6 in the cutting direction), and the second cutting planned line 18 and the third cutting planned line 19 have an angle θ2. None, the third cutting planned line 19 and the fourth cutting planned line 20 form an angle of θ3.

  Further, the line segment length of the second cut planned line of the V notch 11 is represented by L1, and the line segment length of the third cut planned line is represented by L2. Note that the formation angle of the V notch 11 and the line segment lengths L1 and L2 are appropriately changed depending on the intended use and the softness of the sheet material. For example, θ1 and θ3 are 45 °, θ2 is 90 °, Is 2.1 mm and L2 is 2.1 mm.

  The control unit 14 analyzes the cutting pattern 10, recognizes where the V notch 11 is formed in the cutting pattern 10, and stores it in the control unit 14. Hereinafter, a first embodiment of the flow for cutting the V-notch 11 will be described with reference to FIG.

  In step a1, the input cutting pattern 10 data is analyzed in step a2. Subsequently, in step a3, a distance and an angle between points on the cutting line are calculated. In step a4, it is determined whether or not the cutting line corresponds to a corner based on the distance and angle between the points on the cutting line. This can be judged from changes in the length and angle of the line segment formed by the planned cutting line.

  In step a5, it is determined whether or not the corner portion corresponds to the V notch at the position determined as the corner portion in step a4. This determination is made by comparing the line segment length L1 of the first cut planned line of the V notch 11 and the line length L2 of the second cut planned line, the formation angles θ1, θ2, θ3, and the corner data. Done. The position determined as the V notch 11 is stored in the control unit 14 in step a6.

  Next, at the position of the V notch 11, the sheet material 7 is cut based on a control command at the V notch 11 of the cutting blade 6 to be described later as step a7. In cutting the sheet material 7 at corner positions other than the V notch 11, first, after storing the corner position at step a8, the control command of the cutting blade 6 at the corner position is sent to the cutting head 5 at step a9. Is output. Thereafter, the sheet material 7 is cut based on the cutting pattern 10 in step a10, and the cutting is finished in step a11.

  Next, the control of the cutting blade 6 at the position of the V notch 11 will be described below with reference to FIGS.

  First, prior to FIG. 6A, the cutting blade 6 penetrating the sheet material 7 cuts the sheet material 7 in the direction of the first cutting planned line 17 while reciprocating up and down.

  When the cutting edge of the cutting blade 6 reaches the previously recognized cutting start portion of the V notch 11 as shown in FIG. 6A, θ1 (FIG. 4) while reciprocating the cutting blade 6 up and down through the sheet material 7. The cutting blade 6 is oriented in the direction of the second cutting planned line 18 by rotating only as shown in FIG. Subsequently, the cutting blade 6 is advanced in the direction 18 of the second scheduled cutting line.

  Next, as shown in FIG. 6B, the cutting blade 6 is rotated by θ2 (see FIG. 4) while reciprocating up and down in a state of penetrating the sheet material 7, and is directed in the direction of the third cutting planned line 19. . Subsequently, the cutting blade 6 advances along the third cutting planned line 19 and cuts the sheet material 7.

  As shown in FIG. 6C, the cutting blade 6 rotates by θ3 (see FIG. 4) in the direction of the fourth cutting planned line 20 while reciprocating up and down while penetrating the sheet material 7. Subsequently, the cutting blade 6 advances in the direction of the fourth cutting planned line 20, and the sheet material 7 is cut.

  Next, the cutting of the sheet material 7 with the cutting blade 6 at the corner position other than the V notch 11 will be described below with reference to FIGS. 7 (a) and 7 (b). 7A and 7B will be described based on an example in which the angle at the corner position other than the V notch is formed as an acute angle.

  The sheet material 7 is cut by moving the cutting blade 6 while reciprocating up and down from the two-dot chain line position to the solid line position in the direction of the first cutting line 21 as shown in FIG. At this time, the cutting blade 6 cuts to the position (for example, 2 mm) slightly over the intersection of the corners. Then, although not shown, the cutting blade 6 is pulled out from the sheet material 7 and the cutting blade 6 is raised to the removal position on the upper surface of the sheet material 7.

  Next, after the cutting blade 6 is rotated by θ5 as shown in the two-dot chain line position in FIG. 7B and is directed in the direction of the second cutting planned line 22, the cutting blade 6 reciprocates up and down again. The sheet material 7 is penetrated. Note that the cutting position of the cutting blade 6 at this time is a position slightly returned (for example, 2 mm) in the direction of the second cutting line 22 from the intersection of the first cutting line 21 and the second cutting line 22. Is preferred. Subsequently, the cutting blade 6 advances in the direction of the second cutting planned line 22 while reciprocating up and down, and cuts the sheet material 7.

  In addition, the cutting method of the sheet material 7 with the cutting blade 6 at the corner position other than the V notch 11 can be preferably used when the corner is formed at an acute angle (for example, 90 ° or less).

  Next, a second embodiment will be described based on the flow of FIG. Note that the sheet material cutting device used is the same as that of the first embodiment, and only the control of the cutting blade 6 is partially different, so that the description of the sheet material cutting device is omitted.

  First, when starting at step b1, the cutting pattern 7 input to the control unit 14 at step b2 is analyzed. In step b3, the distance and angle between the points on the planned cutting line are calculated from the data of the cutting pattern 7.

  Next, it is determined in step b4 whether or not it corresponds to a corner position from the distance and angle data calculated in step b3. If it is determined that it is a corner, it is subsequently determined in step b5 whether or not it corresponds to the V notch 11.

  The position information determined to be the V notch 11 at step b5 is stored in the control unit 14 at step b6, and subsequently, a control command at the position of the V notch 11 is output to the cutting head 5 at step b7.

  If it is determined in step b4 that the portion is other than the corner portion, a cutting blade control command is output to the cutting head 5 in step b11, and the cutting blade 6 cuts the sheet material 7 based on the control command.

  Further, the corner portion determined to be other than the V notch 11 in step b5 is determined to have an angle change in step b8, and when the angle θ for rotating the cutting blade 6 at the corner portion is less than 90 °, It is determined that the angle formed by the corner is an obtuse angle, and the sheet material 7 is cut in step b11. When the rotation angle θ of the cutting blade 6 at the corner is 90 ° or more in step b8, it is stored in a storage unit (not shown) of the control unit 14 as an acute angle cutting position in step b9. Subsequently, in step 10, a control command for the cutting blade 6 at the acute angle cutting position is output, and in step b11, the sheet material 7 is cut. When all the cutting patterns 10 are cut, the cutting is finished in step b12.

  In the embodiment of the present invention, the angle θ is 90 ° as a reference. However, the angle is not limited to 90 °, and is an optimum angle according to the material, hardness, thickness, and the like of the sheet material. Can be set.

  Next, a cutting method according to another embodiment of the V-notch will be described below with reference to FIGS.

  First, prior to FIG. 9A, the cutting blade 6 penetrating the sheet material 7 cuts the sheet material 7 in the direction of the first cutting planned line 17 while reciprocating up and down.

  As shown in FIG. 9A, when the cutting edge of the cutting blade 6 reaches the cutting start portion of the V notch 11 recognized in advance, the cutting blade 6 is pulled out from the sheet material 7 and rises to the retracted position on the upper surface of the sheet material 7. To do. Subsequently, the cutting blade 6 is rotated by θ1 so that the cutting edge of the cutting blade 6 is directed in the direction of the second cutting planned line 18 and moved so that the cutting edge is positioned at the apex position of the corner of the V notch 11. Is done. While the cutting blade 6 reciprocates up and down again, the cutting edge 6 penetrates through the sheet material 7 so that the cutting edge is located at the apex position of the corner of the V notch 11.

  Next, as shown in FIG. 9B, the cutting blade 6 is removed from the sheet material 7 and is raised to the retracted position on the upper surface of the sheet material 7. Subsequently, the cutting blade 6 rotates by θ2 and is directed in the direction of the third cutting planned line 19. Next, the cutting edge 6 is moved so that the cutting edge is positioned at the apex position of the corner of the V notch 11. While the cutting blade 6 reciprocates up and down again, the cutting edge 6 penetrates through the sheet material 7 so that the cutting edge is located at the apex position of the corner of the V notch 11.

  As shown in FIG. 9C, the cutting blade 6 is pulled out of the sheet material 7 again and rises to the retracted position on the upper surface of the sheet material 7. Subsequently, the cutting blade 6 rotates by θ3 and is directed in the direction of the fourth cutting planned line 20. Next, the cutting blade 6 is moved so that the rear end of the cutting blade 6 is positioned at the corner of the V notch 11. The cutting blade 6 reciprocates up and down again, and penetrates the sheet material 7 so that the rear end of the cutting blade 6 is at the apex position of the corner. Subsequently, the cutting blade 6 advances in the direction of the fourth cutting planned line 20, and the sheet material 7 is cut.

  The above is the sheet material cutting device and the cutting method of the present invention, and appropriate modifications can be made within the scope of the invention.

  For example, the line segment length of the second cutting planned line and the line segment length of the third cutting planned line and the angles θ1, θ2, and θ3 are used to determine whether the V notch is used. You may make it judge from the depth of an opening part, or the formation angle of a V notch.

  In addition, an appropriate cutting method can be adopted for the V notch cutting method and the sharp corner cutting. In short, if the V notch and the corner position are recognized in advance, a cutting method suitable for each can be applied. good.

  In the above description, the V notch and the Λ notch have been treated equally. However, the V notch and the Λ notch may be treated separately, and the cutting method may be changed between the V notch and the Λ notch. In particular, since the V notch is a cut to the required side of the sheet material 7, a cut that protrudes as much as possible at the apex of the corner of the V notch is not preferred.

DESCRIPTION OF SYMBOLS 1 Sheet material cutting device 2 Cutting table 3 Y beam 4 Rail 5 Cutting head 6 Cutting blade 7 Sheet material 8 Vinyl sheet 10 Cutting pattern 11 V notch 12 I Notch 13 Perforation 14 Control part 15 Pattern input part 16 Input part 17 1st cutting Scheduled Line 18 Second Cut Scheduled Line 19 Third Cut Scheduled Line 20 Fourth Cut Scheduled Line 21 First Cut Scheduled Line 22 Second Cut Scheduled Line 30 Sheet Material 31 V Notch 32 Cutting Blade 33 First Cut Scheduled Line 34 Second Cutting line 35 Third cutting line 36 Fourth cutting line

Claims (8)

The sheet material is sucked and held on a cutting table, and the sheet material is desired by moving the cutting head along a pre-designed cutting pattern while reciprocating a cutting blade provided in the cutting head. In the sheet material cutting device that cuts into the shape of
A control unit for recognizing a cutting angle and a cutting line segment length formed by a cutting planned line from the cutting pattern;
The control section compares the cutting angle and the cutting line segment length with the cutting angle and cutting line segment length set in advance as a notch, and the cutting angle and the cutting line segment length are set in advance. A sheet material cutting device characterized in that when it is equal to the length, it is determined as a notch and the notch cutting control is performed at the time of cutting.   The sheet material cutting device according to claim 1, wherein the notch is a V notch and / or a Λ notch.   3. The sheet material according to claim 1, wherein the notch cutting control performs cutting while rotating the cutting blade according to a shape of the notch in a state where the cutting blade penetrates the sheet material. Cutting device.   When cutting the cutting pattern in the acute angle direction other than the notch, the control unit cuts the first cutting planned line, then pulls the cutting blade out of the sheet material and rotates the cutting blade in the second cutting planned line direction. 4. The sheet material cutting device according to claim 1, wherein the cutting blade is again passed through the sheet material to control the movement of the cutting blade in the direction of the second cutting line. The sheet material sucked and held on the cutting table is moved into the desired shape by moving the cutting head along a cutting pattern inputted in advance while reciprocating the cutting blade provided in the cutting head up and down. In the cutting method of the sheet material to be cut,
Analyzing the cutting pattern;
Calculating a distance and an angle between points on the cutting line from the cutting pattern;
Determining whether the cutting line corresponds to a corner based on the distance and angle between the points on the cutting line ; and
When the cutting line is determined to be a corner, determining whether the corner corresponds to a notch;
If the corner is determined to be a notch, storing the position of the notch as a notch position ;
Performing notch cutting control at the notch position;
A sheet material cutting method characterized by comprising:   The sheet material cutting method according to claim 5, wherein the notch is a V notch and / or a Λ notch. After the step of determining whether or not the corner corresponds to a notch , if the component angle of the corner other than the notch is 90 ° or less, it is determined as an acute angle cutting position and the acute angle 7. The sheet material cutting method according to claim 5, wherein the cutting control is performed at the cutting position. Cutting control at the acute angle cutting position,
When cutting the sheet material, the cutting blade is moved through the sheet material along the first cutting line direction and cut to a position slightly beyond the corner, and then the cutting blade is pulled out from the sheet material and cut. The blade is rotated in the second cutting line direction, and then the cutting blade is penetrated to a position where the rear end of the cutting blade slightly protrudes outward from the corner and cut in the second cutting line direction. The sheet material cutting method according to claim 7, wherein the sheet material is cut.

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