JP2008052502A - Nesting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a nesting system improving a yield rate in nesting a component in a material. <P>SOLUTION: A nesting determination part 10 compares a yield rate calculated by a yield rate calculation part 9 with a previously set yield rate. When the yield rate calculated by the yield rate calculation part 9 is smaller than the preset yield rate, a renesting condition setting part 11 changes a nesting condition on the basis of at least one sort of data out of component data 2, material data 4 and working machine data 5 which are sent from the outside. Then, the renesting condition setting part 11 allows a nesting performance part 8 to perform renesting under the changed nesting condition. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a nesting system for setting an arrangement pattern of parts with respect to a material, and more particularly to a nesting system capable of improving a yield rate when nesting parts with respect to a material.

  For example, sheet metal members for elevators, specifically door panels, reinforcement brackets, three-sided frames, cab side wall panels, ceiling panels, floor panels, etc. There is known a method of cutting the material. In this case, nesting for setting an arrangement pattern of sheet metal members (hereinafter also referred to as parts) with respect to the material is performed in advance. Here, nesting refers to a process of optimizing the arrangement position of parts and setting an arrangement pattern so that material waste is reduced. In such nesting, a high yield rate is required in order to suppress the material cost of the material. The yield rate means the ratio of the area to be used as a part of this material to the entire area of the standard material. In order to obtain a large yield rate in nesting, setting of the arrangement pattern of components on the material is usually performed by nesting software.

  In the nesting software, the material material, thickness, size, number of pieces and the size and number of parts to be separated from this material are given as input data, and an arrangement pattern with a large yield rate is created based on these input data. calculate. Many nesting software has one of automatic processing and interactive processing.

  In nesting, there is no particular problem when cutting as much of the same part as possible from a single material, such as standard parts and stock parts. However, in many cases, the number of necessary parts is determined in advance, and how to nest with a small number of materials is an important issue.

  However, in the conventional nesting method, for example, when nesting parts corresponding to 10 materials, the parts can be separated from the first to ninth materials with a sufficient yield rate. In the extreme case, the first material can be nested only by one small part. Such a problem cannot be avoided even when nesting software having an excellent algorithm is used. Here, the reason for performing nesting at once is that such nesting is necessary for the assembly process in the subsequent process and cannot be carried over to the next nesting.

  For this reason, in the conventional nesting software, the nesting conditions are changed, the size of the material is changed, or the necessary parts are added next time through interactive processing in order to reduce the material cost of the material. Some nesting software has been devised so that an irregularly shaped empty area can be registered as a scrap and used for the next nesting.

  In addition, in the component automatic plate cutting method as shown in Patent Document 1, for a plate material whose yield is a specified value or less, a component is edited at a predetermined position of the plate material. Moreover, in the automatic nesting apparatus as shown in the cited document 2, a method for simplifying the remaining material area has been proposed. Each method is a method in which the remaining material is effectively used.

JP 2001-184112 A JP-A-10-289010

  However, when processing large-scale parts that handle dozens or hundreds of materials per day, such as manufacturing sheet metal parts for elevators, for example, human operations such as the aforementioned interactive processing are not possible. It takes a long time. In this case, an optimal arrangement pattern may not always be obtained in nesting due to individual differences among operators.

  Also, it is preferable to register the empty area of the last material as a scrap material and use it for the next nesting because the material management labor for the material storage location etc. increases due to the increase in the material type of the scrap material. Absent.

  The present invention has been made in consideration of such points, and by examining the yield rate of the material from the result of executing the nesting software and automatically executing the yield improvement measure, the operation in the human system is performed. It is an object of the present invention to provide a nesting system that can improve the yield rate when nesting parts with respect to a material without need.

  The present invention is a nesting system for setting an arrangement pattern of parts with respect to a material, and a nesting execution unit that performs nesting based on each data relating to parts, materials, processing machines, and nesting conditions sent from the outside, A yield rate calculating unit that is connected to the nesting execution unit and calculates a yield rate in the arrangement pattern when the nesting is performed by the nesting execution unit; and connected to the yield rate calculation unit and calculated by the yield rate calculation unit Information on the arrangement pattern set by the nesting execution unit when the yield rate calculated by the yield rate calculation unit is equal to or higher than the set yield rate. A nesting determination unit that outputs the nesting to the processing machine; The yield rate calculated by the yield rate calculation unit is smaller than the set yield rate, and the parts, materials, and processing machines sent from outside are connected to the nesting determination unit and the nesting execution unit. A nesting system comprising: a nesting condition setting unit that changes a nesting condition based on at least one type of data and causes the nesting execution unit to perform nesting again with the changed nesting condition. It is.

  According to such a nesting system, re-nesting is performed on an arrangement pattern formed by performing nesting in the nesting system until the yield rate related to the arrangement pattern is equal to or higher than a preset set yield rate. Therefore, it is possible to prevent a material having a low yield rate from actually occurring, and to reduce the material cost of the material. Further, if the number of materials is reduced, the processing time including loading / unloading in the processing machine can be shortened.

  In the nesting system according to the present invention, the nesting condition setting unit sets a beam width between the components to a preset beam width lower limit value when resetting the arrangement pattern of the components with respect to the material when performing nesting. It is preferable to make it smaller within a range that does not fall below.

  Alternatively, in the nesting system according to the present invention, the nesting condition setting unit may select a material type to be used for performing nesting when a plurality of types having different sizes are used as the material. It is preferable to change to a thing.

  Alternatively, in the nesting system of the present invention, the nesting condition setting unit has at least the highest yield rate in each processing machine when performing nesting when the same type of material is used in a plurality of different processing machines. For each small material, it is preferable to reset the arrangement pattern so that the parts to be arranged in each material are collectively arranged in one material.

  Alternatively, in the nesting system according to the present invention, the nesting condition setting unit may include a stock item that is generally used as a part with respect to the material in the resetting of the arrangement pattern of the part with respect to the material when performing nesting. It is preferable to reset the arrangement pattern so as to arrange as much as possible.

Alternatively, in the nesting system of the present invention, the nesting condition setting unit includes all the nesting trials among the following nestings (a) to (d) or the following (a) to (d): It is preferable that two or more nesting trials are performed, and the nesting execution unit is made to perform nesting under the nesting conditions according to the method having the highest yield rate among the trial methods.
(A) In re-nesting, in resetting the arrangement pattern of the parts with respect to the material, the crosspiece width between the parts is reduced within a range that does not fall below a preset crosspiece lower limit value.
(B) When a plurality of types having different sizes are used as the material, the type of material to be used for nesting is changed to a small size.
(C) When the same type of material is used in a plurality of different processing machines, each material to be placed on each material at least for each material having the lowest yield rate in each processing machine when performing nesting. The arrangement pattern is reset so that the components are rearranged together in one material.
(D) In performing the re-nesting, in the resetting of the arrangement pattern of the parts with respect to the material, the arrangement pattern is reset so as to arrange the parts and the stocks for general use on the material to the maximum extent.

  According to the nesting system of the present invention, it is possible to improve the yield rate when nesting parts with respect to a material.

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 13 are diagrams showing an embodiment of a nesting system according to the present invention.

First, the entire configuration of the nesting system will be described with reference to FIG. FIG. 1 is an overall configuration diagram showing an overall configuration of a nesting system and its surrounding systems in the present embodiment.

  The nesting system 3 is calculated by a nesting execution unit 8 for performing nesting, a yield rate calculation unit 9 for calculating a yield rate in an arrangement pattern when nesting is performed by the nesting execution unit 8, and a yield rate calculation unit 9. The nesting determination unit 10 that compares the set yield rate with a preset set yield rate, and if the yield rate calculated by the yield rate calculation unit 9 is smaller than the set yield rate, the nesting condition is changed, And a nesting condition setting unit 11 that causes the nesting execution unit 8 to perform nesting under the changed nesting condition.

  Hereinafter, each component in the nesting system 3 will be described in detail.

  The nesting execution unit 8 is given part data 2 from the production management system 1. The component data 2 refers to a component code unique to the component, a size, and the number to be manufactured. The nesting execution unit 8 is separately provided with material data 4, processing machine data 5, nesting condition data 6 and stock product data 7, respectively. Material data 4 refers to the material, plate thickness, and size of the material, and processing machine data 5 refers to the specifications of the processing machine 20 used when actually punching parts from the material in the post-nesting process. The nesting condition data 6 refers to data related to nesting conditions used when nesting is performed in the nesting execution unit 8. The stock product data 7 is data related to stock products that are used for general purposes, unlike parts made of a specific material and size.

  The nesting execution unit 8 automatically performs nesting based on such component data 2, material data 4, processing machine data 5, and nesting condition data 6. When performing such nesting, the nesting execution unit 8 may also refer to the stock product data 7.

  The yield rate calculation unit 9 is connected to the downstream side of the nesting execution unit 8 and calculates the yield rate in the arrangement pattern when the nesting is performed by the nesting execution unit 8. As described above, the yield rate refers to the ratio of the area to be used as a component of this material to the entire area of the standard material.

  The nesting determination unit 10 is connected further downstream of the yield rate calculation unit 9, and compares the yield rate calculated by the yield rate calculation unit 9 with a preset set yield rate. Yes. Here, when the yield rate calculated by the yield rate calculation unit 9 is equal to or higher than a preset set yield rate, the arrangement pattern set by the nesting execution unit 8 is stored in the CAM system 13 described later as nesting data 12. It is supposed to be sent. On the other hand, when the yield rate calculated by the yield rate calculation unit 9 is smaller than the set yield rate, the nesting is performed again in the subsequent nesting condition setting unit 11.

  The nesting condition setting unit 11 is connected further downstream of the nesting determination unit 10, and the nesting determination unit 10 determines that the yield rate calculated by the yield rate calculation unit 9 is smaller than the set yield rate. Sometimes, the nesting condition is changed based on at least one type of data among the component data 2, the material data 4, the processing machine data 5, and the stock product data 7. There are various methods of changing the nesting condition in the nesting condition setting unit 11, and four methods that are particularly effective for improving the yield rate will be described in detail later. The nesting condition setting unit 11 causes the nesting execution unit 8 to perform nesting under the changed nesting condition.

  As shown in FIG. 1, a CAM system 13 is connected to the nesting system 3. Here, the CAM system 13 refers to a computer-aided manufacturing system (Computer-Aided Manufacturing). Specifically, the CAM system 13 performs processing assignment of parts to materials, creation of NC data, and the like. As shown in FIG. 1, nesting data 12 is sent from the nesting system 3 to the CAM system 13.

  The CAM system 13 is connected to the processing machine 20 and controls the processing machine 20 based on the nesting data 12 sent from the nesting system 3. Specifically, the processing machine 20 actually punches parts from the material based on a signal from the CAM system 13 so as to obtain an arrangement pattern related to the nesting data 12.

Next, the operation of the nesting system 3 having such a configuration will be described.
First, the part data 2 is sent from the production management system 1 to the nesting execution unit 8 of the nesting system 3. Further, the material data 4, the processing machine data 5, the nesting condition data 6 and the stock product data 7 are separately sent to the nesting execution unit 8.

  The nesting execution unit 8 performs nesting based on each of these data 2, 4, 5, 6 and 7, and sets the arrangement pattern of parts with respect to the material.

  Next, information related to this arrangement pattern is sent to the yield rate calculation unit 9. Then, the yield rate calculation unit 9 calculates the yield rate in the above arrangement pattern.

  Thereafter, information related to the yield rate is sent to the nesting determination unit 10. Then, the nesting determination unit 10 compares the yield rate calculated by the yield rate calculation unit 9 with a preset set yield rate. Here, when the yield rate calculated by the yield rate calculation unit 9 is equal to or higher than a preset set yield rate, the nesting determination unit 10 uses the arrangement pattern set by the nesting execution unit 8 as the nesting data 12. Send to CAM system 13. On the other hand, when the yield rate calculated by the yield rate calculation unit 9 is smaller than the preset set yield rate, the nesting setting is performed in the nesting condition setting unit 11 in the next process.

  The nesting condition setting unit 11 is connected further downstream of the nesting determination unit 10, and the nesting determination unit 10 determines that the yield rate calculated by the yield rate calculation unit 9 is smaller than the set yield rate. Sometimes nesting conditions are changed. As described above, there are various methods for changing the nesting condition in the nesting condition setting unit 11, and details will be described later. The nesting condition setting unit 11 causes the nesting execution unit 8 to perform nesting under the changed nesting condition.

  Here, when the nesting execution unit 8 sets a new arrangement pattern in the nesting, the nesting determination unit 10 again compares the yield rate related to the new arrangement pattern with the preset set yield rate. Done. In this case, when the yield rate related to the new arrangement pattern is smaller than the preset set yield rate again, such a circulation cycle in the nesting system 3 is repeated until the yield rate exceeds the set yield rate. It becomes.

  On the other hand, when the nesting determination unit 10 determines that the yield rate calculated by the yield rate calculation unit 9 is equal to or higher than a preset set yield rate, the nesting system 3 sends the nesting data 12 to the CAM system 13. It is done. Then, the processing machine 20 actually punches parts from the material based on the signal from the CAM system 13 so that the arrangement pattern according to the nesting data 12 is obtained.

First Renesting Method The first nesting method performed by the nesting condition setting unit 11 will be described with reference to FIGS. Here, FIGS. 2A and 2B are arrangement patterns set by the initial nesting, FIG. 3A is an enlarged view of the area A in FIG. 2A, and FIG. 2) is an enlarged view of region A in FIG. 2A after nesting is performed by the nesting condition setting unit 11 of the nesting system in FIG. 1. FIG. 4 shows an arrangement pattern after the nesting is performed by the nesting condition setting unit 11 of the nesting system of FIG.

In the first nesting method, the nesting condition setting unit 11 does not lower the beam width between the components below the preset beam width lower limit value in the resetting of the component arrangement pattern with respect to the material when performing the nesting. It is designed to be smaller within the range.
Hereinafter, the first nesting method will be specifically described.

  FIG. 2 shows an arrangement pattern when specific 11 parts are nested. The arrangement pattern according to FIG. 2 is set by the first nesting. As shown in FIG. 2A, ten parts are arranged on the first material, but the remaining one These parts are arranged on the second material as shown in FIG. In such a case, the nesting condition setting unit 11 checks the size of the component arranged on the second material, and if this component is a certain size or less, it is determined for each material from the material data 4. The beam width lower limit value is read, and the beam width between parts in the arrangement pattern is reduced so as not to fall below the beam width lower limit value, and thus nesting is executed.

  More specifically, as shown in FIG. 3A, when the crosspiece width between the parts is 10 mm in the initial nesting, the nesting condition is changed, as shown in FIG. In the arrangement pattern, the crosspiece width between parts becomes as small as 7 mm. When nesting is performed again by the nesting execution unit 8 by changing the nesting conditions as described above, the number of materials is one and eleven parts can be arranged as shown in FIG. In addition, when the crosspiece width between parts is changed, the nesting system 3 needs to instruct the CAM system 13 to slow down the axis movement of the processing machine 20 in order to prevent the processing machine 20 from being scattered during the processing. There is.

Second Renesting Method A second nesting method performed by the nesting condition setting unit 11 will be described with reference to FIGS. Here, FIGS. 5A and 5B are arrangement patterns set by the initial nesting, and FIG. 6A is a normal size used in nesting by the nesting execution unit 8 of the nesting system of FIG. (B) shows a material with a small size newly adopted in the nesting condition setting unit 11. FIGS. 7A and 7B are arrangement patterns after nesting is performed by the nesting condition setting unit 11 of the nesting system of FIG.

In the second nesting method, the nesting condition setting unit 11 changes the type of material to be used for performing nesting to a small size when a material of a different size is used as the material. It has become.
Hereinafter, the second nesting method will be specifically described.

  First, FIG. 5 shows an arrangement pattern set by the first nesting in the nesting execution unit 8. Specifically, as a result of performing the first nesting using a material having a size of 5 × 10 standard (1524 mm × 3048 mm), n materials are used, and the first sheet to the first sheet as shown in FIG. The yield rate of the (n-1) th material was a certain size, but the yield rate of the nth material was small as shown in FIG. 5 (b). In such a case, as shown in FIGS. 6A and 6B, when it is possible to use not only a material having a size of 5 × 10 standard but also a material having a size of 4 × 8 standard, n sheets The eye material is not a 5 × 10 standard size material as shown in FIG. 6A, but a 4 × 8 standard (from the component size 2 and material data 4 input to the nesting system 3). It can be seen that the material of FIG. 6 (b) is sufficient.

  In this way, the nesting condition setting unit 11 changes the size of the nth material from the 5 × 10 standard material to the 4 × 8 standard material. As a result, as shown in FIGS. 7A and 7B, all of the first to n−1 5 × 10 size materials and the nth 4 × 8 size material are set. The yield rate can be set to be equal to or higher than the yield rate.

Third Renesting Method A third nesting method by the nesting condition setting unit 11 will be described with reference to FIGS. Here, FIG. 8 is an overall configuration diagram showing an overall configuration of a conventional nesting system, and FIGS. 9A and 9B are arrangement patterns set by the conventional nesting system of FIG. On the other hand, FIG. 10 is an overall configuration diagram showing an overall configuration of a nesting system for performing the third nesting, and FIG. 11 is an arrangement pattern set by the nesting system of FIG.

In the third nesting method, the nesting condition setting unit 11 performs at least each of the processing machines 20a and 20b to perform nesting when the same type of material is used in a plurality of different processing machines 20a and 20b. For each material with the lowest yield rate, the parts to be placed on each material are rearranged together into one material.
Hereinafter, the third nesting method will be specifically described.

  FIG. 8 is an overall configuration diagram showing an overall configuration of a conventional nesting system. When the same type of material is used in a plurality of different processing machines 20a and 20b, the production management system 1 to each nesting system A, Parts data A and B (2a and 2b) are sent to B (3a and 3b), respectively. These nesting systems A and B (3a and 3b) are independent of each other and have their nesting data A and B (12a and 12b). ) And the respective CAM systems A and B (13a and 13b) control the processing machines A and B (20a and 20b) independently of each other based on the nesting data A and B (12a and 12b). It shows that

  In this case, as shown in FIGS. 9A and 9B, there is a possibility that the yield rate of some materials (for example, the last one material) may be reduced in each of the processing machines A and B. 9A and 9B, reference numerals 30a and 30b denote parts punched from the material by the processing machines A and B, respectively.

  On the other hand, in the third nesting method, as shown in FIG. 10, the nesting system 3m sets nesting data 12 relating to both the processing machines A and B (20a, 20b). . Specifically, for example, as shown in FIGS. 9A and 9B, when the yield rate is reduced for some materials, this is determined by the nesting determination units 10a and 10b, and nesting is performed again. In the condition setting unit 11, the arrangement pattern is reset so that the parts 30a and 30b to be arranged on the materials of the respective processing machines A and B (20a and 20b) are rearranged together on only one material. Then, as shown by the solid line in FIG. 10, the nesting condition setting unit 11 causes only one nesting execution unit 8a to perform nesting. At this time, the flow operation shown by the one-dot chain line in FIG. 10 is not performed. The arrangement pattern re-nested in this way is as shown in FIG.

  Thereafter, the nesting data 12 is sent from the nesting system 3m to only one CAM system A (13a) as shown by the solid line in FIG. 10, and the material is arranged in the arrangement pattern re-nested only by one processing machine A (20a). The parts 30a and 30b are punched out (see FIG. 11).

  Thus, in the third nesting method, when the material yield rate is small for the parts 30a and 30b to be manufactured by the respective processing machines A and B (20a and 20b), one processing machine ( For example, by performing nesting in an arrangement pattern (see FIG. 11) in which both parts 30a and 30b are punched from one material by the processing machine A), the yield rate of the material can be increased.

Fourth Renesting Method A fourth nesting method performed by the nesting condition setting unit 11 will be described with reference to FIGS. 12 and 13. Here, FIG. 12 shows an arrangement pattern of a material with a low yield rate, FIG. 13 (a) shows an arrangement pattern by the fourth nesting, and FIG. 4 (b) shows only a stock product cut out from the material. This is an arrangement pattern.

In the fourth nesting method, the nesting condition setting unit 11 sets the arrangement pattern so as to arrange the parts and the stock items to the maximum in the re-establishment of the arrangement pattern of the parts with respect to the material. Reconfiguration is to be performed. Here, the stock product is different from a component having a specific shape and material, and refers to a member (for example, a spare product) that is generally used in an elevator.
Hereinafter, the fourth nesting method will be specifically described.

  FIG. 12 shows an arrangement pattern of materials with a low yield rate. The nesting condition setting unit 11 calls a stock product using the same material as the member shown in FIG. 12 retrieved from the stock product data 7 in the blank area of this material, and performs nesting.

  The nesting condition setting unit 11 designates the number about twice the number of stock items that can be placed on one material. However, this does not apply if the number of stock items on hand is smaller than the specified number. As a result, the number of materials used is two as shown in FIGS. 13A and 13B, but the second material as shown in FIG. Thus, there is a possibility that a stock item must be made after the next nesting, and therefore, only the arrangement pattern relating to the first material as shown in FIG. At this time, the stock product data 7 reflects the number of stock products nested in the first material (specifically, 10 as shown in FIG. 13A).

  Although the first to fourth nesting methods have been described in detail above, in actuality, the nesting condition setting unit 11 performs all nesting attempts or the nesting method among the first to fourth nesting methods described above. Two or more nesting trials are performed, and the nesting execution unit 8 is caused to perform nesting under the nesting conditions according to the method with the highest yield rate among the trial methods. Alternatively, the nesting condition setting unit 11 may perform nesting using any one of the first to fourth nesting methods described above.

  As described above, according to the nesting system 3 of the present embodiment, the nesting determination unit 10 compares the yield rate calculated by the yield rate calculation unit 9 with a preset set yield rate, and yield rate calculation unit 9 is smaller than a preset set yield rate, at the nesting condition setting unit 11, at least one of the component data 2, the material data 4 and the processing machine data 5 sent from the outside. The nesting condition is changed based on one type of data, and the nesting execution unit 8 is caused to perform nesting again with the changed nesting condition. As a result, re-nesting is performed on the arrangement pattern formed by nesting in the nesting system 3 until the yield rate related to this arrangement pattern is equal to or higher than a preset set yield rate. It is possible to prevent the low material from actually occurring, and to reduce the material cost of the material. Further, if the number of materials is reduced, the processing time including loading / unloading in the processing machine 20 can be shortened.

  The nesting system according to the present embodiment is not limited to the above-described aspect, and various changes can be made. For example, in the nesting system 3 shown in FIGS. 1 to 13, the description has been made with the constraint that the nesting unit is not changed (that is, the component data 2 is sent from the production management system 1 in each nesting). By linking the nesting system 3 with the production management system 1, information relating to parts necessary for the next nesting may be prefetched and re-nesting may be performed. That is, the order of parts related to the next nesting may be considered for the current nesting.

  Further, in the nesting system 3, nesting results can be stored and, for example, which part codes are frequently used from the statistical information for a certain period can be used as reference data when making a standardization proposal for parts. .

1 is an overall configuration diagram showing an overall configuration of a nesting system and its surrounding systems in an embodiment of the present invention. This relates to the first nesting, and (a) and (b) are arrangement patterns set by the first nesting. FIG. 2A relates to the first nesting. FIG. 2A is an enlarged view of the area A in FIG. 2A, and FIG. 2B is a nesting condition set by the nesting condition setting unit of the nesting system in FIG. It is the enlarged view of the area | region A of Fig.2 (a) after breaking. This relates to the first nesting and is an arrangement pattern after the nesting is performed by the nesting condition setting unit of the nesting system of FIG. Regarding the second nesting, (a) and (b) are arrangement patterns set by the first nesting. (A) shows a normal-size material used in nesting by the nesting execution unit of the nesting system in FIG. 1, and (b) shows a new nesting condition setting unit. Indicates a small material used. Regarding the second nesting, (a) and (b) are arrangement patterns after the nesting is performed by the nesting condition setting unit of the nesting system of FIG. It is a whole block diagram which shows the whole structure of the conventional nesting system used as a comparison with the 3rd nesting. (A) and (b) are arrangement patterns set by the conventional nesting system of FIG. It is a whole block diagram which shows the whole nesting system structure for performing 3rd nesting. This relates to the third nesting and is an arrangement pattern set by the nesting system of FIG. This relates to the fourth nesting, and is a material arrangement pattern with a low yield rate. This relates to the fourth nesting, (a) is an arrangement pattern by this nesting, and (b) is an arrangement pattern when cutting only stock products from the material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Production management system 2 Parts data 3 Nesting system 4 Material data 5 Processing machine data 6 Nesting condition data 7 Stock goods data 8 Nesting execution part 9 Yield rate calculation part 10 Nesting judgment part 11 Renesting condition setting part 12 Nesting data 13 CAM system 20 Processing machine

Claims (6)

A nesting system for setting an arrangement pattern of parts with respect to a material,
A nesting execution unit that performs nesting based on each data related to parts, materials, processing machines, and nesting conditions sent from the outside,
A yield rate calculation unit that is connected to the nesting execution unit and calculates a yield rate in the arrangement pattern when nesting is performed by the nesting execution unit;
The yield rate calculation unit is connected to the yield rate calculation unit, compares the yield rate calculated by the yield rate calculation unit with a preset set yield rate, and the yield rate calculated by the yield rate calculation unit is equal to or higher than the set yield rate. In some cases, a nesting determination unit that outputs information related to the arrangement pattern set by the nesting execution unit to a processing machine;
Connected to the nesting determination unit and the nesting execution unit, and when the yield rate calculated by the yield rate calculation unit is smaller than the set yield rate, each of the data related to parts, materials, and processing machines sent from the outside A nesting condition setting unit that changes nesting conditions based on at least one type of data, and causes the nesting execution unit to perform nesting with the changed nesting conditions;
A nesting system characterized by comprising:   The nesting condition setting unit reduces the width between the parts within a range that does not fall below a preset width lower limit in the resetting of the arrangement pattern of the parts with respect to the material when performing nesting. The nesting system according to claim 1.   The nesting condition setting unit is characterized in that, when a plurality of types having different sizes are used as the material, the type of material to be used for performing nesting is changed to a small size. Item 1. A nesting system according to item 1.   When the same type of material is used in a plurality of different processing machines, the nesting condition setting unit arranges each material with the lowest yield rate in each processing machine when performing nesting. 2. The nesting system according to claim 1, wherein the arrangement pattern is reset so that the parts to be arranged are rearranged together in one material.   The re-nesting condition setting unit re-arranges the arrangement pattern so as to arrange the parts and the stocks for general use on the material to the maximum when re-establishing the arrangement pattern of the parts with respect to the material. The nesting system according to claim 1, wherein setting is performed. The nesting condition setting unit performs all nesting trials among the following nestings (a) to (d) or two or more nesting trials from the following (a) to (d). 2. The nesting system according to claim 1, wherein the nesting execution unit is made to perform nesting again under a nesting condition according to a method with the highest yield rate among the methods that have been tried.
(A) In re-nesting, in resetting the arrangement pattern of the parts with respect to the material, the crosspiece width between the parts is reduced within a range that does not fall below a preset crosspiece lower limit value.
(B) When a plurality of types having different sizes are used as the material, the type of material to be used for nesting is changed to a small size.
(C) When the same type of material is used in a plurality of different processing machines, each material to be placed on each material at least for each material having the lowest yield rate in each processing machine when performing nesting. The arrangement pattern is reset so that the components are rearranged together in one material.
(D) In performing the re-nesting, in the resetting of the arrangement pattern of the parts with respect to the material, the arrangement pattern is reset so as to arrange the parts and the stocks for general use on the material to the maximum extent.

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