JP3444150B2 - Automatic plate removing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic plate removing apparatus applied to an automatic programming process of a processing program in a plate processing machine such as a laser processing machine or a punch press machine. . 2. Description of the Related Art When a plurality of components are cut out from a fixed-size raw material, a layout of the components is determined as closely as possible so that waste of the material is reduced. Nesting is performed. This stripping has been performed automatically conventionally. However, the conventional automatic stripping machine has been limited to the placement of parts only for the purpose of improving the yield, and the layout is automatically performed without sufficiently considering the limitations on machining of the machine. The yield that can be obtained is not obtained. [0003] For example, in the case of laser processing or punching, as shown in FIG.
The workpiece is fed on a work table (not shown) by gripping the edge with 0. The component w cannot be arranged in this gripping portion. Therefore, conventionally, in order to facilitate the processing of component placement, not only the gripped portion by the work holder 50 but also the entire predetermined width portion D of one side of the plate W including the gripped portion is set as the component placement prohibited area. , Components are arranged in the remaining rectangular portion C. Therefore, the portion where the component w is not arranged increases, and a satisfactory yield cannot be obtained. In the processing of a plate material, if the width of the plate material W, which is a material, is longer than the stroke that can be traversed by the machine, after processing the plate material W halfway, as shown by a chain line in FIG. In such a case, the position at which the plate material W is gripped is changed, and the subsequent processing is continued. Due to the change of the gripping position, the area that can be processed changes as shown by Q1 to Q3 in the same drawing, and even a plate processing machine having a short feed stroke can process the entire long plate W. . However, the conventional automatic stripping apparatus determines the arrangement of the components w over the entire board W as a material without considering such a change in the gripping position by the work holder 50. For this reason, when the component placement information that is the result of the plate removal is directly used as the NC data, the operation of changing the gripping position of the work holder 50 may be increased unnecessarily. In order to prevent this, the maximum dimensions of parts to be automatically trimmed are also limited, but in that case, trimming of parts with large dimensions cannot be performed automatically, which takes time and effort in the trimming process. . Even if the component size is simply limited, for example, when processing the component wa on the right side of FIG.
When the processing is started at the gripping position of the work holder W corresponding to No. 1, it is necessary to change the gripping position during the processing of one component wa. In the case of laser processing, such a change in the gripping position in the middle of one component wa causes a great reduction in the processing quality, and therefore it is necessary to avoid it as much as possible. for that reason,
There is a case where it is necessary to largely correct or change the component placement information obtained by automatic board removal when converting the information into NC data. An object of the present invention is to solve such a problem, and an object of the present invention is to provide an automatic plate removing apparatus capable of improving the yield of a plate material processed using a work holder. . Another object of the present invention is to prevent a change in the gripping position during the processing of one component when changing the gripping position of the plate material, and to grip the plate material with the work holder before the gripping position change. It is an object of the present invention to enable parts to be arranged even at a different location, and to further improve the yield. Yet another object of the present invention is to
It is an object of the present invention to change the gripping position of a plate material so that a work holder can reliably grip the plate material and further improve the yield. A configuration of the present invention will be described with reference to FIG. 1 corresponding to an embodiment. This automatic plate removing device is an automatic plate removing device for arranging a part (w) to be cut on a plate (W) gripped by a work holder (9). Work holder registration means (3) for registering the position and shape of 9);
The component placement means (6) which determines the location of each component (w) on the plate (W) according to a predetermined rule ((8)) including the position and shape of the work holder (9) registered in this means (3) as conditions. According to this configuration, when arranging parts, first, the position and shape of the work holder (9) are arranged with respect to the plate (W). ) by, will be placed in accordance with the plate material (the parts (w) a predetermined rule W) (8). the predetermined rule (8) is such condition that the most yield good condition. this condition In arranging the components so as to comply with the requirements, the gripping portion of the work holder (9) may be recognized by the component arranging means (6) as, for example, one of the components whose arrangement is fixed. The position and shape of the holder (9) can be used for component placement. Considered as one of the feeder conditions,
By arranging the components so as not to interfere with the gripping position of the work holder (9), for example, an extra range such that the entire part of a predetermined width along one side of the plate (W) is set as a prohibition range of the component arrangement. It is not necessary to set the parts arrangement to the prohibited range, and the yield can be improved. An embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 3 is a block diagram showing a hardware configuration of an automatic programming device including the automatic plate removing device. The computer 11 is connected with storage means such as a fixed disk device 12 and a floppy disk device 13, input means 14 such as a keyboard and a mouse, and output means such as a display 15 and a graphic printer 16. The computer 11 includes an internal storage device in addition to the central processing unit. The internal storage device or the fixed disk device 12 stores programs and data constituting an automatic programming device and an automatic plate-cutting device. I have. The automatic programming device is a device for automatically generating a machining program consisting of an NC program for a plate material processing machine such as a laser processing machine or a punch press machine. Is configured. As shown in FIG. 1 (B), this automatic plate removing apparatus is an apparatus for determining the arrangement of a plurality of parts w to be cut out from a rectangular plate material W. Is shown in FIG. 1 (B). As shown in FIG. 1, this automatic board removing apparatus includes a material information storage unit 1 for storing the shape and size of a board W, and a plurality of parts w.
A part shape storage means 2 for storing the shape and size of each of them, and a part arranging means 6, a work holder information storage means 3, and a holding operation presence / absence determining means 4
And a machining area setting means 5 and a sheet taking result information storage means 7. The material information storage unit 1 and the component information storage unit 2 store the shape and size together with identification information such as the part numbers of the plate material W and the component w. The work holder information registering means 3 is a means for registering the position and shape of the work holder 9 on the plate material W in a predetermined storage means.
The position of the range to be gripped and the outer peripheral shape thereof are registered. In this case, a slightly wider range including the unprocessable area than the range gripped by the work holder 9 may be registered. When the gripping position of the plate material W by the work holder 9 is changed, the work holder 9 at each position to be changed is changed.
The position and shape of are registered separately. The work holder 9 grips the edge of the plate W on a table (not shown) in the plate processing machine and feeds the plate on the table by moving the work W. Usually, a plurality (2 to 4 work holders) are provided. ) Are attached to the same moving body (not shown). If the length of the plate material W stored in the material information storage unit 1 is longer than the plate material feed stroke registered in advance of the machine, the holding operation presence / absence determining unit 4 This is a means for determining that the gripping position of the plate material W by the work holder 9 is to be changed. The processing area setting means 5 corresponds to each gripping position of the work holder 9 on the plate material W, in response to the plate material feed stroke registered in advance of the machine, when it is determined by the holding operation presence / absence determining means 4 that there is switching. This is a means for setting processing regions R1 to R3 to be processed. The processing regions R1 to R3 are ranges obtained by dividing the plate material in the length direction. The component arranging means 6 is a means for arranging each component w on the plate material W according to a predetermined rule 8. The predetermined rule 8 is to satisfy all of the next yield condition, the processing area corresponding condition, and the holding portion remaining condition, and is determined by the processing units 8a to 8c (FIG. 2) of each condition. Further, the component arranging means 6 includes an area information providing means 10 for providing processing area information for identifying to which processing area each of the arranged components w is arranged to the position information of each component w. The yield condition processing section 8a (FIG. 2)
This is means for selecting and temporarily arranging each component w based on a predetermined selection criterion, calculating the yield at the time of the arrangement, and determining the component arrangement in the best yield state. This yield condition processing unit 8
In a, the position and shape of the work holder 9 on the plate material W are handled in the same manner as each component w, except that the arrangement is fixed before each component w. The processing region correspondence processing unit 8b targets the processing regions R1 to R3 corresponding to the holding operation as a plate material region where components are arranged by the yield condition processing unit 8a, and a work holder 9 for each of the processing regions R1 to R3.
This is a means for calculating the position and the shape of the condition by including them in the condition. The gripping part remaining condition processing unit 8c includes the yield condition processing unit 8
a, the work holders 9 in different processing areas R1 to R3.
When arranging the part w at a location that interferes with the gripping position of
A predetermined gripping part a that can grip the plate material w with the work holder 9
Are arranged so as to be able to be left, and when they cannot be left, the arrangement is impossible. The grip portion a may be set by an area value, or may be determined by a horizontal width, a vertical width, a predetermined relationship range between the two, and the like. The plate taking result information storage means 7 stores the position information of each part w determined by the part placing means 6 in the processing areas R1 to R
This is a means for storing together with the information of No. 3, in which the component identification information, the component shape information, the component position information, and the processing area information are stored correspondingly. A method of arranging components according to the above configuration will be described.
The member arranging unit 6 arranges each component w stored in the component information storing unit 2 with respect to the plate material W stored in the material information storing unit 1 according to a predetermined rule 8. At this time, when the gripping position is not changed by the work holder 9, the position and shape of the work holder 9 registered in the work holder information registration unit 3 are first set to the plate material W, and each of the remaining portions of the plate material W is set. The arrangement of the parts w is determined. When the holding position is changed by the work holder 9, that is, when it is determined that the holding operation is performed by the holding operation determining unit 4, the processing area setting unit 5 sets the processing area corresponding to each holding position of the work holder 9. R1-R
Set 3. The component arranging means 6 includes the processing regions R1 to R1.
The position and shape of the work holder 9 are determined for each R3, and the parts w are arranged in the remaining portions of the processing regions R1 to R3. Regarding the part w whose arrangement has been determined,
Machining area information for distinguishing whether or not the area is arranged with respect to R3 is added to the position information. Most of the processing regions R1 to R3 overlap each other, and each component w may belong to any one of the processing regions. It is set as distinguishing information as to whether or not it is arranged. The number of processing areas R1 to be set is determined by the number of processing areas at the time when component placement is completed. As described above, since the components are arranged for each of the processing regions R1 to R3, the processing of one component w over different processing regions is prevented. Therefore, a decrease in processing quality and processing accuracy due to the seam of the cutting line is prevented. In addition, since the components are arranged for each of the processing regions R1 to R3, the components can be arranged even at positions where the plate material W is gripped by the work holder 9. For example, when a part is processed in the processing region R3 with respect to the position of the work holder 9 at the position of the processing region R1 (the position indicated by a solid line in FIG. 1B), as shown by a chain line in FIG. w5 and w6 can be arranged, and even if arranged in this way, the workpiece can be gripped by the work holder 9 during processing. Therefore, processing with high yield can be performed. In addition, since the processing area information is given to each of the arranged parts w, it is possible to perform simple and complete automatic processing, reduce the number of times of holding, and perform high-efficiency processing when creating NC data. . However, with respect to the gripping position of the work holder 9 in each of the processing regions R1 to R3, different processing regions R
Also, when arranging components for 1 to R3, certain restrictions are placed on the arrangement of components. That is, the different regions R1 to R
When the workpiece W is gripped by the work holder 9, the gripping portion a is large enough to hold the workpiece W without any trouble in feeding the workpiece.
Is restricted by the gripping part remaining condition processing unit 8c so that the remains. Thereby, even after the gripping position is changed, the plate material can be fed by the work holder 9 without difficulty. The processing region R1
To set a plurality of processing regions R1 to R3
When the change order of is determined, the consideration of the grip portion a can be relaxed. That is, the processing regions R1 to R3 in which the components are to be placed now
Since the work holder position in the processing regions R1 to R3 in which the component arrangement is determined earlier than the work holder position is not held later, there is no need to leave the holding part a.
However, in a case where the plate material W is unloaded after returning to the original gripping position after the completion of the processing, the parts in the different processing areas R1 to R3 are positioned differently from the gripping positions of the work holder 9 in the first processing areas R1 to R3. Even when the arrangement is performed, the grip portion a is left. The processing for making the presence / absence of the gripping part a different depending on the case is appropriately determined by the gripping part remaining condition processing unit 8c. When arranging the component w for each of the processing regions R1 to R3, under what conditions,
Whether to place components in R3 is appropriately set as a predetermined rule of the component placement means 6. For example, when the plate material dimension is short as shown in the figure, that is, when the width dimension of the plate material W is shorter than a predetermined dimension in the machine width direction, the components are arranged as follows. First, components are arranged in the first machining region R1, and when a component that cannot be arranged in the machining region R1 occurs in this arrangement process, the components are arranged in another machining region R3. When all the component arrangements are completed, the component arrangement (nesting) for the plate material W ends. In the arranging process, when there is a part that cannot be arranged even in the another machining area R3, another machining area R2 is set and the parts are arranged. The first processing region R1 is in a range of a predetermined length from the reference side (the left side in the drawing) of the plate W, and the third processing region R
Reference numeral 3 denotes a range of a predetermined length from the side opposite to the reference side, and the second processing region R2 is an intermediate range. The actual machining order is the order of the machining regions R1, R2, R3 close to the reference side. If the plate material is long, that is, if the width of the plate W is longer than a predetermined size in the machine width direction, the components are arranged as follows. First, components are arranged in the first processing region R1, and when a component that cannot be arranged in the processing region R1 occurs during the component arrangement process, the second processing region R2 is set and the components are arranged. When all the component arrangements are completed, the component arrangement for the plate material W ends. In the arranging process, when there is a component that cannot be arranged even in the second machining region, the third machining region R3 is set and the component is arranged. In this way, the setting of the processing area and the component arrangement are repeated as necessary. If components cannot be arranged in a plurality of general machining regions, a machining region of minute change is set, and components are arranged. The processing area of this minute change is a processing area obtained by shifting an arbitrary processing area by substantially the holding area of the work holder 9. It should be noted that the deviation amount is set so as not to deviate to the next normal processing region. For example, the first processing region R1 is set as a grip region of the work holder 9 and 200
The processing area is shifted by mm (not deviating to the processing area R2). The first processing region R1 is shifted in the minus direction by 200
It may be set in the range shifted by mm. Similar to the above, the setting of the processing region of the minute change can be applied to the second and third processing regions R2 and R3. In the case where the plate material size is long, the actual processing order is the order of the first, second, and third processing regions R1, R2, and R3 even if the components are arranged in the above order. When a micro-change processing area is set, the processing of the micro-change processing area for the general processing area is performed after the processing of the general individual processing area. For example, R
1, R1 + 200, R2, R3. In any of the above plate material dimensions, when arranging components, the priority may be set such that a processing region in the reverse order from the reference side has a higher priority (for example, in the order of R3, R2, R1). . this is,
Since R1, R2, and R3 are used during actual machining, the plate holding portion necessary for the holding operation is the first machining region R.
There is much left on one side, and there is a degree of freedom in the plate pressing position, which is advantageous. As described above, according to this automatic plate removing apparatus, the arrangement of parts is automatically guaranteed to avoid the work holder position and the workable plate material feeding range, and the automatic plate removing result is converted into the NC program. The correction logic is simple. In addition, the maximum value of the lateral feed stroke can be guaranteed even with laser processing in which automatic command division is difficult to perform even with respect to the limitation of component dimensions. According to the automatic plate removing apparatus of the present invention, a work holder registering means for registering a position and a shape of a work holder on a plate material and a position and a shape of the work holder registered in the means are provided as conditions. for those with a component placement device for determining the placement of each component on the plate material at a predetermined rule, including, with respect to the plate material for machining using the work holder, Ru can improve the yield.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 (A) is a block diagram showing a conceptual configuration of an automatic plate removing apparatus according to an embodiment of the present invention, and FIG. It is a top view. FIG. 2 is a block diagram showing a configuration of a component arranging means of the automatic plate removing apparatus. FIG. 3 is a block diagram showing a hardware configuration of an automatic programming device including the automatic plate removing device. FIG. 4 is an explanatory view showing a board removing method by a conventional automatic board removing apparatus. [Description of Signs] 1 ... Material information storage means 2 ... Parts information storage means 3 ... Work holder information registration means 4 ... Holding operation presence / absence determination means 5 ... Machining area setting means 6 ... Parts arrangement means 8 ... Predetermined rule 9 ... Work holder R1 to R3 processing area W plate material w parts

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G05B 19/18-19/46 G06F 17/50-17/50 680

Claims (1)

(57) [Claim 1] An automatic board removing device for arranging a part to be cut on a board held by a work holder,
Work holder registration means for registering the position and shape of the work holder on the plate, and a part for determining the arrangement of each part on the plate according to a predetermined rule, including the position and shape of the work holder registered in the means as conditions. Arrangement means,
The component arranging means recognizes a gripping position of the work holder as one of the components having a fixed arrangement, and considers the position and shape of the work holder as one of the conditions for arranging the components. An automatic plate removal device that arranges components so as not to interfere.