JP5100369B2 - Cutting machine and sheet material feeding cutting method - Google Patents

Description

  The present invention is a cutting machine for cutting a sheet material such as fabric or leather into a desired pattern composed of a plurality of parts, and in particular, a part protruding from a cutting area can be efficiently and cleanly cut from the sheet material. The present invention relates to a cutting machine and a sheet material feeding cutting method.

  As a cutting method of the sheet material by a conventional cutting machine that cuts the sheet material while moving on the cutting table, for example, as shown in Patent Document 1, a method for cutting along a predetermined path is used. In addition, a machining window having a length set in advance to the length of the machining zone in the advance direction of the sheet material is configured, and the machining window is moved along with the advancement of the sheet material, and cutting is performed within the determined machining window. A sheet material feed cutting method has been proposed in which a cutting tool such as a blade is moved in two directions (X-axis direction and Y-axis direction) to move each path in the processing window to cut the sheet material. ing.

In the sheet material cutting method as described above, the sheet material is cut with a processing tool such as a cutting blade along the path in the processing window while moving the processing window simultaneously with the advancement of the sheet material. The cutting process range of the blade is limited to a process window narrow in the sheet material supply direction (X-axis direction).
Therefore, when the part to be cut in the processing area is long in the sheet material supply direction (X-axis direction) and is long so as to protrude from the processing window, it must be divided into a plurality of parts so as to enter the processing window. .
Thus, when one part is cut intermittently by dividing it into a plurality of narrow parts, it is not only troublesome and time consuming, it is also difficult to clean the joints, and it is easy to leave uncut parts, which is a problem in product value Could occur.
Japanese National Patent Publication No. 8-511480

  The present invention has been proposed in view of the above problems, and when cutting a sheet material with a cutting machine capable of sheet material feed cutting, a processing tool such as a cutting blade (cutting means) even when cutting a long part ) Is shortened as much as possible to improve the cutting efficiency, and it is also possible to improve the product value by preventing the occurrence of uncut parts.

  In order to achieve the above object, a cutting machine according to the present invention is provided with a cutting head that is equipped with a cutting blade and is movable on a cutting table, and has a conveying means for carrying a sheet material to be cut onto the cutting table, In the cutting machine that can cut the parts from the sheet material by moving the cutting head along the cutting line while carrying the sheet material by the sheet material, after cutting the previous part by sheet material cutting Judgment means for judging whether or not the target part on the cutting line to be cut by the cutting blade when cutting the sheet material of the next part enters the cutting area based on the cutting data before cutting the next part, and determination by the judging means As a result, if it is determined that the target part on the cutting line to be cut by the cutting blade is within the cutting area at the time of cutting, the sheet material is continuously cut from the previous part, and the cutting blade When it is determined that there is a part that does not enter the cutting area when cutting, the cutting part is cut so that the target part on the cutting line that the cutting blade cuts by sheet material cutting enters the cutting area. Calculation means for calculating the cutting waiting time for carrying in the sheet material without cutting and the cutting waiting position of the cutting head, and loading of the sheet material without cutting during the cutting waiting time at the cutting waiting position determined by the calculating means And a cutting control means for performing the above.

  In the cutting machine according to the present invention, the cutting control means increases the sheet material carrying speed by the conveying means during the cutting waiting time, and recalculates the cutting waiting time when the sheet material carrying speed is increased by the computing means. The cutting waiting position calculated by the calculation means is an arbitrary position between the cutting completion position of the previous part and the cutting start point of the next part, or during cutting of a part in the cutting area after starting the cutting of the next part. It is also characterized by the position at which the cutting blade is raised on the sheet material.

  Further, the cutting machine according to the present invention is such that the judging means cuts on the cutting line from the cutting start point of the part, on the sheet material loading side from the cutting start point, and the cutting direction is from the sheet material loading side to the sheet material unloading side. When a return point is searched and one or more return points are found, a time T1 required for cutting from the cutting start point to the return point, and a time T2 required for the return point to enter the cutting area, Is calculated based on the cutting data, and the time T1 required for cutting from the cutting start point to the turning point is longer than the time T2 required for the turning point to enter the cutting area for all the turning points searched. After the part, the sheet material feed cutting of the next part is performed, and the time T1 required for cutting from the cutting start point to the turning point is the time until the turning point enters the cutting area. When it is determined that there is a turning point that is not longer than the time T2 required for the time T1, the time T1 required for cutting from the cutting start point to the turning point is determined as the turning point in the cutting area. The cutting waiting time that is longer than the time T2 required to enter is calculated, and the cutting waiting position of the cutting head is obtained.

  The sheet material feeding cutting method according to the present invention includes a cutting head that is equipped with a cutting blade and is movable on a cutting table, a conveying means that carries the sheet material to be cut onto the cutting table, and the sheet material is fed by the conveying means. In the cutting method using a cutting machine that can cut the parts from the sheet material by moving the cutting head along the cutting line while carrying in the sheet material cutting method, after cutting the previous part by sheet material cutting, the next It is determined whether or not the target part on the cutting line that the cutting blade cuts into the cutting area when cutting the part sheet is fed based on the cutting data before cutting the next part, and the cutting blade cuts as a result of the determination. If it is determined that the target part on the cutting line is within the cutting area at the time of cutting, the sheet material feed cutting will continue after the previous part, and the target on the cutting line cut by the cutting blade If it is determined that there is a part that does not enter the cutting area when cutting, the sheet material is cut without cutting so that the target part on the cutting line cut by the cutting blade enters the cutting area. The most important thing is to calculate the cutting waiting time for carrying in, determine the cutting waiting position of the cutting head, and carry in the sheet material without cutting during the cutting waiting time at the obtained cutting waiting position. It is a characteristic.

  In the sheet material feeding cutting method according to the present invention, the sheet material feeding speed by the conveying means is increased during the cutting waiting time, and the cutting waiting time when the sheet material loading speed is increased is recalculated. This is also a feature.

  In the cutting machine according to the present invention, after cutting the previous part by sheet material feeding cutting, whether or not the target part on the cutting line that the cutting blade cuts when performing the sheet material feeding cutting of the next part enters the cutting area Judgment means that determines whether or not based on the cutting data before cutting the next part If cutting the sheet material continues to the part and it is determined that there is a part that does not enter the cutting area at the time of cutting, the cutting blade cuts on the cutting line cut by the sheet material cutting Calculating means for calculating a cutting waiting time for carrying in the sheet material without cutting so that the target portion falls within the cutting area and determining a cutting waiting position of the cutting head; Since it is equipped with a cutting control means that carries in the sheet material without cutting during the cutting waiting time at the cutting waiting position, a cutting tool such as a cutting blade (cutting means) even when cutting long parts ) Can be shortened as much as possible to improve the cutting efficiency, and the occurrence of uncut portions can be prevented, so that a cutting machine capable of cutting with high commercial value can be provided.

Further, the cutting control means increases the sheet material carry-in speed by the conveying means during the cutting waiting time, and the calculation means recalculates the cutting wait time when the sheet material carry-in speed is increased. There is an advantage that the cutting waiting time can be shortened and the cutting efficiency can be further improved.
The cutting waiting position calculated by the calculation means is an arbitrary position between the cutting completion position of the previous part and the cutting start point of the next part, or onto the sheet material while cutting the part in the cutting area after starting the cutting of the next part. In the case where the cutting blade is raised, there is an advantage that the cutting waiting time can be effectively used and the cutting efficiency can be improved.
In addition, the determination means searches the turning point from the cutting start point of the part to the cutting direction on the cutting line, on the sheet material carry-in side from the cutting start point, and the cutting direction from the sheet material carry-in side to the sheet material carry-out side, When one or a plurality of turning points are found, a time T1 required for cutting from the cutting start point to the turning point and a time T2 required for the turning point to enter the cutting area are calculated based on the cutting data. For all the turning points searched, if the time T1 required for cutting from the cutting start point to the turning point is longer than the time T2 required for the turning point to enter the cutting area, the sheet of the next part following the previous part The time T1 required for performing the material feed cutting and cutting from the cutting start point to the turning point is longer than the time T2 required for the turning point to enter the cutting area. When it is determined that there is a turn point that is not long, the calculation means takes a time T1 required for cutting the turn point from the cutting start point to the turn point for the target turn point. In addition to calculating a longer cutting waiting time and obtaining the cutting waiting position of the cutting head, it is possible to eliminate unnecessary waiting time of a processing tool (cutting means) such as a cutting blade and improve cutting efficiency. There are advantages.

  In the sheet material feeding cutting method according to the present invention, after cutting the previous part by sheet material feeding cutting, the target part on the cutting line that the cutting blade cuts when performing the sheet material feeding cutting of the next part is within the cutting area. It is determined by the determining means based on the cutting data before cutting the next part, and as a result of the determination by the determining means, it is determined that the target portion on the cutting line to be cut by the cutting blade is within the cutting area at the time of cutting. In this case, sheet material feed cutting is performed on the previous part, and if it is determined that there is a part that does not fall within the cutting area when cutting, the cutting blade cuts with the sheet material cutting. The calculation means calculates the cutting waiting time for carrying in the sheet material without cutting so that the target portion on the cutting line falls within the cutting area and the cutting waiting position of the cutting head. Since the sheet material is carried in by the cutting control means without cutting during the cutting waiting time at the cutting waiting position, the existing cutting method can be used as well as newly performing the cutting method. By implementing instead of this, even when cutting long parts as described above, the waiting time of a cutting tool such as a cutting blade (cutting means) is shortened as much as possible to improve cutting efficiency, and the occurrence of uncut parts By being able to prevent, there is also an advantage that the commercial value of the cut parts can be improved.

The most preferred embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view showing an external appearance of the cutting machine 1, and reference numeral 1 in the figure indicates the cutting machine as a whole. A cutting carriage 3 is provided on the cutting table 2 of the cutting machine 1.
The cutting carriage 3 is movable on the cutting table 2 in the length direction thereof, that is, in the conveying direction (X-axis direction) of the sheet material 4, and the cutting carriage 3 has a cutting means 9 for cutting the sheet material 4. A cutting head 6 including a cutting blade 5 is provided on the cutting carriage 3 so as to be movable in the width direction of the sheet material 4, that is, in the Y-axis direction orthogonal to the transport direction.
The cutting blade 5 can be lifted and lowered in the Z-axis direction by lifting means (not shown) incorporated in the cutting carriage 3.

The cutting table 2 is configured in a conveyor drive system having a plurality of bristle brushes 7 on the surface, and the cutting blade 5 of the cutting means 9 slides up and down at high speed based on the cutting data 8 shown in FIG. Cut by
The surface of the sheet material 4 is covered with a non-air-permeable covering sheet 11 such as polyethylene fed out from the sheet roll 10.
The non-breathable covering sheet 11 is also cut together with the sheet material 4 by the cutting blade 5 of the cutting head 6.
This cutting eliminates the non-breathability of the non-breathable covering sheet 11, so that after the cutting, the non-breathable covering sheet 11 is coated again with a new non-breathable covering sheet 12.
The new non-breathable covering sheet 12 is spread between a sheet roll 13 provided on the cutting carriage 3 and a stand 14 provided on the front end of the cutting table 2.

Usually, an unillustrated unfolding table is installed on the sheet material carry-in side of the cutting machine 1, and the sheet material 4 to be unfolded by the unfolding machine is drawn out and spread on the unfolding table so that the sheet material 4 has a desired length. Are to be stacked. A pick-up table (not shown) is installed on the sheet material carry-out side of the cutting machine 1, and the cut sheet material 4 is carried onto the pick-up table.
In this type of cutting machine 1, cutting efficiency can be improved by cutting the sheet material 4 while carrying it to the cutting table 2 of the cutting machine 1, and the cut parts are on the left in the figure. It is picked up by an installed pickup table (not shown).
Therefore, the longer the sheet material 4 is, the more efficiently it can be rolled and the cutting by the cutting machine 1 can be performed.
The sheet material 4 is disposed on an underlay sheet (not shown) having a larger area, and the underlay sheet is made of, for example, kraft paper having air holes formed at regular intervals.
The underlay sheet is used in order to prevent the bristle brush 7 forming the surface of the cutting table 2 of the cutting machine 1 from sticking into the sheet material 4 when the stretched sheet material 4 is cut by the cutting machine 1. .
Reference numeral (C) in the drawing is a cutting area (C) on the cutting table 2, and the sheet material 4 laminated on the spreading table by the spreader is from the sheet material carry-in side of the cutting table 2 (see FIG. It is carried in from the upper right to the left) and is cut in this cutting area (C).

FIG. 2 shows a schematic electrical configuration of an embodiment of the present invention.
Cutting data 8 created by a CAD device or the like is input to the input means 15. The storage unit 16 stores the cutting data 8 input by the input unit 15.
The cutting control unit 18 controls a cutting unit 9 including a conveying unit 19 such as a conveyor provided in the cutting machine 1 and a cutting blade 5 that is driven up and down.
As will be described later, the determination means 20 is an object on the cutting line of the part to be cut by the cutting blade during the sheet material feeding cutting in the cutting area (C) on the cutting bed 2 from now on by the sheet material feeding cutting. It is determined whether or not the location falls within the cutting area (C).
The calculation means 17 performs cutting during cutting of the sheet material when there is a portion where the target portion on the cutting line cut by the cutting blade does not fall within the cutting area (C) while the determination means 20 is cutting the sheet material. A cutting waiting time for carrying in the sheet material without cutting so that the cutting position on the line falls within the cutting area (C) and the cutting waiting position of the cutting head 6 during the cutting waiting time are determined.
Such determination means 20, storage means 16 and cutting control means 18 are provided in the controller 21 of the cutting machine 1 as shown in the figure.

Next, a procedure for cutting the sheet material 4 by the cutting machine 1 configured as described above will be described.
FIG. 3 is a flowchart of the determination means 20, and this flowchart is executed before starting cutting of each part.
Sheet material feed cutting is performed in which the sheet material 4 laminated by the spreader is cut while being conveyed onto the cutting bed 6 of the cutting machine 1.
As shown in FIG. 3, the determination means 20 starts in step (S1), and the cutting starts in the direction of cutting on the cutting line L from the cutting start point S of the part P to be cut shown in FIG. 4 in step (S2). The turning direction Pn from the carrying side of the sheet material 4 to the carrying side of the sheet material 4 is searched for at the carry-in side of the sheet material 4 from the point S, and one or a plurality of turn-up points (part 1 in FIG. 4). And part 2 recognizes P1 each, and part 3 recognizes P1 · P2 · P3) Pn, and determines whether or not there is a turning point Pn in step (S3).
If there is no turn-back point Pn in the part to be cut next in step (S3), the process proceeds to step (S4), and the sheet material 4 is cut as it is by the cutting blade 5 of the cutting means 9 by cutting the sheet material. Cut.

When it is determined in step (S3) that there is one or more turn-back points Pn, the process proceeds to step (S5), and time T1 required for cutting from the cutting start point S of each part to be cut to each turn-back point Pn. And the time T2 required for each turn point Pn to enter the cutting area (C) is calculated based on the cutting data 8.
In step (S6), the time T1 required for cutting each turn point Pn from the cutting start point S to each turn point Pn and the time required for each turn point Pn to enter the cutting area (C). The time T1 required to cut all the turn points Pn from the cutting start point S to the turn point Pn is longer than the time T2 required for the turn point Pn to enter the cutting area (C). For example, when the turning point Pn is cut during sheet material feeding cutting, the turning point Pn is in the cutting area (C), and the process proceeds to step (S4), and the sheet material feeding cutting is performed following the previous part. I do.

On the contrary, when there is a turning point Pn in which the time T1 required for cutting from the cutting start point S to the turning point Pn is not longer than the time T2 required for each turning point Pn to enter the cutting area (C), Even if the sheet material cutting is performed as it is, the target portion to be cut is not in the cutting area (C), so that the cutting cannot be performed.
Therefore, the process proceeds to step (S7), and the time T1 required for cutting from the cutting start point S to the turn-back point Pn is longer than the time T2 required for each turn-up point Pn to enter the cutting area (C). The cutting waiting time for carrying in the sheet material 4 without cutting is calculated, and the cutting waiting position of the cutting head 6 is determined. The cutting waiting position may be an arbitrary position such as the cutting start point S of the next part to be cut after cutting the previous part, and the cutting blade 5 is raised above the sheet material 4 during the cutting of the next part. May be the waiting position of the cutting head 6.

In step (S8), during the cutting waiting time calculated in step (S7), cutting with the cutting blade 5 is not performed, the cutting head 6 is placed in the cutting waiting position, and the sheet material is cut in the cutting area of the cutting machine 1. (C) It is carried on.
Thus, when the cutting waiting time elapses, sheet material cutting is started again.
During the cutting waiting time, the cutting waiting time is shortened when the conveying speed of the sheet material by the conveying means 19 is set to, for example, 6 to 10 m / min, which is a double speed, for example, where the conveying speed at the time of normal cutting is 3 to 5 m / min. can do. In this case, the cutting waiting time is recalculated by the calculating means 17.

The sheet material cutting according to the present invention will be described with reference to FIG.
Assume that after part 1 and part 2 are cut by sheet material cutting, part 3 is cut next.
First, the determination means 20 searches for a turning point in the part 3. In the case of this part 3, it is recognized that there are three turning points P1, P2, and P3. Next, for each turning point, the time T1 required for cutting from the cutting start point S to each turning point Pn and the time T2 required for each turning point Pn to enter the cutting area (C) are the cutting data 8. Calculated based on

For each turning point Pn, a time T1 required for cutting from the cutting start point S to each turning point Pn is compared with a time T2 required for each turning point Pn to enter the cutting area (C). As a result of the comparison, for example, it is determined that the time T1 required for the turning point P2 to cut from the cutting start point S to the turning point Pn is not longer than the time T2 required for each turning point Pn to enter the cutting area (C). Suppose that At this time, for the turn-around point P2, the calculating means has a time T1 required for cutting from the cutting start point S to the turn-back point P2 longer than a time T2 required for each turn-up point P2 to enter the cutting area (C). The cutting waiting time for carrying in the sheet material 4 without cutting and the cutting waiting position of the cutting head 6 are obtained.
The cutting waiting position may be the cutting start point S in the part 3, but if there is a location u where the cutting blade 5 is raised and pulled out from the sheet material 4 between the cutting start point S and the turning point P 2, this position Is set as the waiting position of the cutting head 6, the cutting waiting time is further shortened, and the cutting efficiency can be further increased.

In order to shorten the cutting waiting time, the cutting blade 5 once rises from the cutting end portion of the part and moves to the cutting start position of the part while moving from the cutting end of the previous part to the cutting start of the next cutting part. Further, the cutting waiting time can be further shortened by adding the descending time of the cutting blade at the cutting start position to the time T1 required to cut each turn point from the cutting start point S of the part to be cut next. it can.
In the above embodiment, the cutting means 9 is formed by the cutting blade 5 that slides up and down at high speed. However, the cutting means 9 is not limited to this, and the cutting blade is a round blade, a laser beam, Of course, the cutting means 9 can be formed by a water jet.

It is the perspective view which showed the external appearance of the cutting machine of this invention. It is a block diagram which shows the schematic electrical constitution of one Example of this invention. It is a flowchart of the cutting operation by the cutting machine shown in FIG. It is explanatory drawing of the cutting operation by the cutting machine shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Cutting machine 2 ... Cutting table 4 ... Sheet material 5 ... Cutting blade 9 ... Cutting means 18 ... Cutting control means 17 ... Calculation means 20 ..Judging means C ... Cutting area

Claims (6)

  A cutting head equipped with a cutting blade and movable on the cutting table is provided, a conveying means is provided for carrying the sheet material to be cut onto the cutting table, and the cutting head is moved along the cutting line while carrying the sheet material by the conveying means. In a cutting machine that can cut the part from the sheet material by moving it, the cutting blade cuts when cutting the previous part after cutting the previous part by cutting the sheet material. A judgment unit that determines whether or not the target part on the cutting line falls within the cutting area based on the cutting data before cutting the next part, and the target part on the cutting line that the cutting blade cuts as a result of the judgment by the judgment means Sometimes when it is determined that it is within the cutting area, the sheet material is cut continuously from the previous part, and the target area on the cutting line that the cutting blade cuts is the cutting area when cutting. If it is determined that there is a part that does not enter the cutting material, the cutting waiting time for carrying in the sheet material without cutting so that the target part on the cutting line cut by the cutting blade enters the cutting area by cutting the sheet material is cut. Calculation means for calculating and determining a cutting waiting position of the cutting head, and a cutting control means for carrying in the sheet material without cutting during the cutting waiting time at the cutting waiting position obtained by the calculating means. Characteristic cutting machine.   The cutting control means increases the sheet material carrying speed by the conveying means during the cutting waiting time, and the computing means recalculates the cutting waiting time when the sheet material carrying speed is increased. Item 1. The cutting machine according to Item 1. The cutting waiting position determined by the calculation means is any position between the cutting completion position of the previous part and the cutting start point of the next part, or on the sheet material during part cutting in the cutting area after starting cutting of the next part. The cutting machine according to claim 1 or 2, wherein the cutting blade is at a position where the cutting blade is raised. In the direction of cutting the cutting line on the cutting line from the cutting start point of the part, the determination unit searches the turning point from the cutting start point to the sheet material carry-in side and the turning direction from the sheet material carry-in side to the sheet material carry-out side, When one or a plurality of turning points are found, a time T1 required for cutting from the cutting start point to the turning point and a time T2 required for the turning point to enter the cutting area are calculated based on the cutting data. For all the turning points searched, if the time T1 required for cutting from the cutting start point to the turning point is longer than the time T2 required for the turning point to enter the cutting area, the sheet of the next part following the previous part The time T1 required for performing the material feed cutting and cutting from the cutting start point to the turning point is longer than the time T2 required for the turning point to enter the cutting area. When it is determined that there is a turn point that is not long, the calculation means takes a time T1 required for cutting the turn point from the cutting start point to the turn point for the target turn point. 2. The cutting machine according to claim 1, wherein a cutting waiting time that is longer than that is calculated and a cutting waiting position of the cutting head is determined.   A cutting head equipped with a cutting blade and movable on the cutting table is provided, a conveying means is provided for carrying the sheet material to be cut onto the cutting table, and the cutting head is moved along the cutting line while carrying the sheet material by the conveying means. In the cutting method with a cutting machine that can cut the parts from the sheet material by moving the sheet material, it is cut when the next part sheet material is continuously cut after cutting the previous part by sheet material feeding cutting. Whether the target part on the cutting line cut by the blade enters the cutting area is determined based on the cutting data before cutting the next part, and if the target part on the cutting line cut by the cutting blade is cut, the cutting area is cut. If it is determined that it is inside, the sheet material will be cut continuously from the previous part, and the target part on the cutting line cut by the cutting blade will not enter the cutting area when cutting. If it is determined that there is a place, calculate the cutting waiting time to carry in the sheet material without cutting so that the target location on the cutting line cut by the cutting blade in the sheet material feed cutting enters the cutting area, A sheet material feeding and cutting method characterized in that a cutting waiting position of a cutting head is determined, and a sheet material is carried in without being cut during a cutting waiting time at the obtained cutting waiting position.   6. The sheet material feeding cutting according to claim 5, wherein the cutting waiting time when the sheet material carrying speed by the conveying means is increased and the sheet material carrying speed is increased is recalculated during the cutting waiting time. Method.

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