JP2007052622A - Sheet metal nesting device and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet metal nesting device capable of determining high-yield component arrangement by efficient calculation, and showing various component arrangement results. <P>SOLUTION: This sheet metal nesting device is provided with a component arrangement position determination means 7 determining arrangement order of components P1-P3 to a material W according to the order when the arrangement order of the components P1-P3 is given. The sheet metal nesting device is provided with a means 5 determining the arrangement means in each the component and a means 6 determining the arrangement order in each component kind as a means determining the arrangement order of the components. The sheet metal nesting device is provided with a means 4 selecting an arrangement order determination method for one of the arrangement order in each the component and the arrangement order in each the component kind. The sheet metal nesting device is provided with a means 8 evaluating a result of arrangement positions by the component arrangement position determination means 7. The evaluation means 8 returns to the selection means 4 for the arrangement order determination method and repeats processing again in the case of unsatisfactory evaluation. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sheet metal nesting apparatus and a program for performing nesting for sheet metal processing such as punching and laser processing.

FIG. 4 shows a flow of operations in a general sheet metal working process. First, design products such as switchboards and control panels, and create a development view of the components that make up the product. Then, a die is assigned to the part, and nesting is performed to efficiently take the part to which the die is assigned from the sheet-like material. Finally, the nesting result is output as processing data and processing is performed.
Although these operations are performed on a computer (CAD / CAM system for sheet metal), the shape of the developed part to which the mold generated in the work process is assigned is indefinite, and the part is placed on the material with a high yield. The nesting operation to be performed is a very skillful operation.
Various systems have been developed and put into practical use as an automated system (automatic nesting system) for supporting this work.

However, there are various combinations of component data to be given, and there are cases where the conventional automatic nesting system cannot sufficiently cope.
In the conventional automatic nesting system, the deployed parts to be arranged are handled on a component type basis. In other words, the parts of the same part type are arranged in a concentrated manner, and when the operator operates the automatic nesting system, even if the case can be arranged on one material, the automatic nesting system is arranged on two materials.

As a simple specific example, there is a case where three parts P1 and P2 and six parts P3 shown in FIG. In this case, when the operator performs, even in the case where the material is placed on one material W as shown in FIG. 3C, the automatic nesting system may place it as shown in FIG. 3B. In this example, one piece of component P1 and two pieces of component P3 cannot be arranged with respect to one piece of material W, and it is necessary to arrange them on another material.
The conventional automatic nesting system also has a function to invert the same parts and perform pairing, but in this example, the pairing processing cannot be supported. If the operator operates, it can be understood that the combination may be arranged in accordance with the shape of the component, but it has been very difficult to realize such processing on the computer.

  In the nesting operation, it is considered that there is a difference in the determination of the optimal arrangement depending on the operator. However, in the conventional automatic nesting system, only one result is presented, and it is a problem that the system is very uniform.

  An object of the present invention is to provide a sheet metal nesting apparatus and a program capable of determining a component arrangement with a high yield by an efficient calculation and showing various component arrangement results.

The sheet metal nesting device (1) of the present invention comprises:
Nesting request for storing nesting request component data (D) which is information defining the types of sheet metal components (P1 to P3) to be nested, the required number of components for each type, and the plane graphic data of the components for each type Parts storage means (3);
An arrangement order determining method selecting means (4) for determining which of the first and second methods for determining the arrangement order of the parts (P1 to P3) with respect to the material (W) is selected according to the setting rule (R1); ,
This is executed when the first method is selected by the selection means (4), and the arrangement order of the parts (P1 to P3) of all the parts (P1 to P3) in the nesting request part data (D) is set according to the part type. A part-by-part arrangement order determining means (5) for determining for each part regardless of
When the second method is selected by the selection means (4), the arrangement order of the parts (P1 to P3) of all the parts (P1 to P3) in the nesting request part data (D) is set for each part type. An arrangement order determining means (6) for each component type to be determined;
When the arrangement order of the parts (P1 to P3) is determined by any one of the arrangement order determining means for each part (5) and the arrangement order determining means for each component type (6), the material ( Component placement position determining means (7) for determining the placement position of each component (P1 to P3) with respect to W) from the plane graphic data of the material (W) and the plane graphic data of the components (P1 to P3), The arrangement order determining method selection means (4) selects the arrangement order again by evaluating the result of the arrangement position of the parts (P1 to P3) determined by the means (7) according to the setting criteria or by external input. Or evaluation means (8) for selecting whether to adopt the component arrangement position determined by the component arrangement position determination means (7).
Is.

  According to this configuration, the component arrangement position determining means (7) is provided, and when the arrangement order is given to the means (7), the arrangement of all the parts (P1 to P3) with respect to the material (W) according to the order. Determine the position. In this case, if the result of the arrangement position is determined to be one with respect to the arrangement order, the result of the arrangement position differs depending on how the arrangement order is determined. Therefore, a preferable arrangement result can be obtained by repeating the process of evaluating the arrangement position result by changing the arrangement order. In this case, as a method for determining the arrangement order, the present invention seeks to obtain a suitable arrangement result with high computational efficiency by combining the determination of the arrangement order for each part and the determination of the arrangement order for each part type. Is.

The processing will be described in order. First, it is assumed that nesting request component data (D) is given. The arrangement order determination method selection means (4) selects the first method and the second method, that is, whether to determine the arrangement order for each component or to determine the arrangement order for each component type. This selection is performed according to the setting rule (R1). The setting rule (R1) may be determined as appropriate. For example, two methods may be alternately selected, or may be determined according to the number of components and the number of component types.
When the first method is selected, the arrangement order determining unit (5) for each part determines the arrangement order of all the parts (P1 to P3) with respect to the material (W) for each part regardless of the part type.
When the second method is selected, the arrangement order of all parts (P1 to P3) with respect to the material (W) is determined for each part type by the arrangement order determining means (7) for each part type.
When the arrangement order is determined by any method, the component arrangement position determining means (7) determines the arrangement position of each component (P1 to P3) with respect to the material (W) in the determined arrangement order. It is determined according to the setting rule from the plane graphic data of W) and the plane graphic data of the part.
The result of the component placement position determined in this way is evaluated by the evaluation means (8), and it is determined whether or not to adopt the result of the placement position. This evaluation and selection of adoption / non-employment may be performed automatically, or may be performed by an operator, and selection of presence / absence of adoption may be performed by external input. When a sufficient result is obtained, the process is terminated. Otherwise, it returns to the selection of the first and second methods by the arrangement order determination method selection means (4), and the arrangement order by the arrangement order determination means for each component (5) or the arrangement order determination means for each component type (6). The component arrangement position is determined by the component arrangement position determination means (7), and the evaluation is again performed by the evaluation means (8).

  In this way, an optimum arrangement result is obtained by changing the order in which the parts (P1 to P3) are arranged in various ways. In particular, the present invention has means (5) for determining the arrangement order for each part and means (6) for determining the arrangement order for each part type as means for determining the arrangement order of the parts (P1 to P3). Since the two arrangement order determining means (5, 6) can be properly used by the arrangement order determining method selecting means (4), the arrangement order for obtaining the optimum result can be obtained with a small number of repetitions. For example, when the arrangement order is variously changed by repeated processing, the arrangement order for each part can be changed by using both the arrangement order determination method for each part and the arrangement order determination method for each part type alternately or on an appropriate basis. Compared with the case where only the order determination method or only the arrangement order determination method for each component type is adopted, the result of the excellent component arrangement position can be obtained with a smaller number of repetitions. In addition, various component placement results can be shown as repeated component placement results.

The sheet metal nesting program (2) of the present invention is a computer executable program,
A procedure (S1) of storing nesting request component data, which is information defining the types of sheet metal parts to be nested, the required number of parts for each type, and the plane graphic data of the parts for each type;
A procedure (S2) for determining which of the first and second methods for determining the arrangement order of the parts with respect to the material is to be selected according to the setting rule;
A procedure that is executed when the first method is selected in this method selection procedure (S2), and determines the arrangement order of the nesting request component data for all the components for each component regardless of the component type ( S3)
A procedure (S4), which is executed when the second method is selected in the method selection procedure (S2), and determines the arrangement order of the nesting request component data with respect to the materials of all the components for each component type;
When the arrangement order of parts is determined in either the procedure (S3) for determining the arrangement order for each part or the procedure (S4) for determining the arrangement order for each part type, in the determined arrangement order, A procedure (S5) for determining an arrangement position of each part with respect to the material according to a setting rule from the plane graphic data of the material and the plane graphic data of the part;
Whether to return to the arrangement order determination method selection procedure by evaluating the result of determining the arrangement position of the parts in this procedure (S5) based on setting criteria or by external input, and to select the arrangement order again Or a procedure (S9) for selecting whether to adopt the component placement position determined in the procedure for determining the component placement position.

  When the sheet metal nesting program (2) is executed by a computer, the processes described with respect to the sheet metal nesting device (1) of the present invention are performed, and a component arrangement with a high yield can be determined by an efficient calculation.

The sheet metal nesting apparatus according to the present invention includes an arrangement order determining method selecting means, a component arrangement order determining means, a component type arrangement order determining means, a component arrangement position determining means, and an arrangement order determining method selecting means. Since the evaluation means for selecting whether or not to select the arrangement order is provided, it is possible to determine a component arrangement with a high yield by an efficient calculation and to show various component arrangement results. .
The sheet metal nesting program according to the present invention includes a procedure for selecting an arrangement order determination method, a procedure for determining an arrangement order for each part, a procedure for determining an arrangement order for each component type, and each component for a material in the determined arrangement order. And a procedure for selecting whether or not to adopt a predetermined component placement position, it is possible to determine a component placement with a high yield by an efficient calculation.

  An embodiment of the present invention will be described with reference to FIGS. The sheet metal nesting apparatus 1 includes a sheet metal nesting program 2 shown in FIG. 2 and a computer (not shown) that executes the program 2.

First, the sheet metal nesting program 2 will be described with reference to FIG. The sheet metal nesting program 2 is a computer-executable program and includes the following procedures.
Types of sheet metal parts P1 to P3 (P1 _{1 to} P1 ₃ , P2 _{1 to} P2 ₃ , P3 _{1 to} P3 ₆ ) (see FIG. 1) for nesting, the required number of parts for each kind, and parts for each kind A procedure (S1) of storing nesting request component data (D), which is information defining the plane graphic data.
A procedure for determining which one of the first and second methods for determining the arrangement order of the parts P1 to P3 with respect to the material W is to be selected according to the setting rule (S2).
This is executed when the first method is selected in this method selection procedure (S2), and the order of arrangement of all the parts P1 to P3 in the nesting request part data D with respect to the material W is determined for each part regardless of the part type. Procedure to determine (S3).
A procedure that is executed when the second method is selected in the method selection procedure (S2), and determines the arrangement order of the nesting request component data D with respect to the material W of all the components P1 to P3 for each component type ( S4).
When the arrangement order of parts is determined in either the procedure (S3) for determining the arrangement order for each part or the procedure (S4) for determining the arrangement order for each part type, in the determined arrangement order, A procedure for determining the placement positions of the parts P1 to P3 with respect to the material W from the plane graphic data of the material W and the plane graphic data of the parts P1 to P3 according to the setting rule R2 (S5).
By evaluating the result of determining the arrangement positions of the parts P1 to P3 in this procedure (S5) on the basis of the setting or by external input, the procedure returns to the arrangement order determination method selection procedure (S2), and the arrangement order again. Or a procedure (S9) for selecting whether to adopt the component placement position determined in the component placement position determination procedure (S5).

In this example, the evaluation procedure (S9) includes a procedure (S6) for calculating an evaluation value and a procedure (S7) for comparing the calculated evaluation value with a set value. In the procedure for comparing the evaluation values (S7), if the value is equal to or greater than the set value, the process is terminated. If the value is less than the set value, the process returns to the arrangement order determining method selection procedure (S2). The evaluation value is, for example, a yield.
In the evaluation procedure (S9), the component placement position determined in the component placement position determination procedure (S5) is output as a diagram on the screen of the screen display device 14, for example, and is input as a result of the evaluation by the operator. The process may be terminated by the availability input from the input unit 12 or the process may return to the arrangement order determination method selection procedure (S2).

In the evaluation procedure (S9), when returning to the arrangement order determination method selection procedure (S2), the evaluation value is returned through the procedure (S8) for storing the evaluation values together with the arrangement order. In the history storing procedure (S8), the highest evaluation value and the order of arrangement are stored. For example, the current evaluation value is compared with the highest evaluation value, and when the maximum value is exceeded, the highest evaluation value and the stored contents of the arrangement order are updated.
The details of the sheet metal nesting program 2 will be described in the description of the sheet metal nesting apparatus 1 in FIG.

FIG. 1 is an explanatory diagram of a conceptual configuration showing each function achievement means of the sheet metal nesting apparatus 1 formed by installing the sheet metal nesting program 2 in a computer.
The sheet metal nesting apparatus 1 includes a nesting request component storage unit 3, an arrangement order determination method selection unit 4, a component arrangement order determination unit 5, a component type arrangement order determination unit 6, a component arrangement position determination unit 7, and an evaluation unit 8. Is provided. The evaluation unit 8 includes an evaluation value calculation unit 9 and an evaluation value comparison unit 11. In addition to this, the sheet metal nesting apparatus 1 has a history storage means 10, an external input means 12, a nesting result output means 13, and an activation means 15, and is connected to a screen display device 14 such as a liquid crystal display device. . The starting means 15 is means for starting the processing of the sheet metal nesting apparatus 1.

The nesting request component storage means 3 is means for executing the procedure S1 of FIG. 2 and is a sheet metal component P1 (P1 _{1 to} P1 ₃ ), P2 (P2 _{1 to} P2 ₃ ), P3 (P3 ₁ to P3 ₁ to This is means for storing nesting request component data D, which is information defining the type of P3 ₆ ), the required number of components P1 to P3 for each type, and the plane graphic data of components P1 to P3 for each type. The nesting request component data D is data on nesting performed at a time. In addition, in the case of machining using a punch tool (not shown) or the like, the plane graphic data of the parts P1 to P3 is graphic data shown together with the tool assignment data, or graphic data that substitutes the parts with the tool assignment data. May be. The part type data is a part type number or the like. In this embodiment, for example, parts having the same shape and different directions, such as the parts P1 and P2, are different types of parts, but such parts having the same shape and different directions are handled as the same part types. It is good as a thing. The plane graphic data of the parts P1 to P3 is, for example, vector data based on a collection of line data and the like.

  The arrangement order determination method selection means 4 is means for executing the procedure (S2) of FIG. 2, and the first method (arrangement for each part) and the second method for determining the arrangement order of the parts P1 to P3 with respect to the material W. This is a means for determining which method (method for each component type) is selected according to the setting rule R1. The setting rule R1 may be determined as appropriate. For example, the first method and the second method are alternately selected for each repetition. The setting rule R1 may select the same method every time in an iterative process depending on conditions. For example, when the number of parts in the nesting request part data D is smaller than the set number, the first method may be always selected. Further, when the number of component types is smaller than the set number, the first method may be always selected.

The component-by-part arrangement order determining means 5 is a means for executing the procedure (S3) of FIG. 2 and is executed when the first method is selected by the arrangement order determining method selecting means 4. The part-by-part arrangement order determining means 5 determines the arrangement order of all parts P1 to P3 in the nesting request part data D with respect to the material W, regardless of the part type, parts P1 ₁ to P1 ₃ , P2 _{1 to} P2 ₃ , P3 ₁ to. It is determined for each P3 _6. The arrangement order determination method may be a set method such as a random determination method. However, the same arrangement order is not adopted in the repetition process.

The component type arrangement order determination means 6 is a means for executing the procedure (S4) of FIG. 2 and is executed when the second method is selected by the arrangement order determination method selection means 4. The arrangement order determining means 6 for each component type is an arrangement order of all the parts P1 (P1 _{1 to} P1 ₃ ), P2 (P2 _{1 to} P2 ₃ ), and P3 (P3 _{1 to} P3 ₆ ) of the nesting request part data D with respect to the material W. Is determined for each part type. That is, the arrangement order is continuous for all the parts P1 (P1 _{1 to} P1 ₃ ) of one part type, and the arrangement order is continuous for all the parts P2 (P2 _{1 to} P2 ₃ ) of another part type, After that, all the parts P3 (P3 _{1 to} P3 ₆ ) of another part type are arranged sequentially. Which part type should be the first order may be a set method, for example, it may be a set method such as determining in descending order of the long side dimension of the part. Shall not be taken.

The component arrangement position determining means 7 determines the arrangement positions of the components P1 to P3 with respect to the material W from the plane graphic data of the material W and the plane graphic data of the component according to the setting rule R2. The plane figure data of the material W may be only vertical and horizontal dimension values on the assumption of a rectangular material, for example. The plane graphic data of the material W may be set as a fixed value or the like in the component arrangement position determining means 7, or may be input every time nesting is performed. When the component arrangement order is determined by either the component arrangement order determination unit 5 or the component type arrangement order determination unit 6, the component arrangement position determination unit 7 performs the component arrangement position in the determined arrangement order. Determine.
The setting rule R2 is, for example, arranged in the horizontal direction (X direction) sequentially from one corner of the rectangular material W, and if there is a margin that can be arranged at the same position in the horizontal direction, the vertical direction (Y direction). It will be arranged to go to. Further, as the setting rule R2, for example, in the case of a component having unevenness such as the illustrated components P1 and P2, a rule for performing a process of combining two pieces so that the unevenness fits may be included.
The setting rule R2 is preferably a rule in which the result of the component arrangement position is uniquely determined when the arrangement order is determined, that is, the rule in which the result of the component arrangement position is one with respect to the arrangement order.

  The evaluation means 8 is a means for executing the procedure (S9) of FIG. 2, and evaluates the result of the placement positions of the parts P1 to P3 determined by the part placement position determination means 7 on the basis of setting, or external input Whether the arrangement order determination method selection means 4 selects the arrangement order again by an external input from the means 12, or the arrangement positions of the components P1 to P3 determined by the component arrangement position determination means 7 are adopted. Make a selection.

In this embodiment, the evaluation unit 8 includes the evaluation value calculation unit 9 and the evaluation value comparison unit 11 as described above.
The evaluation value calculation means 9 is a means for executing the procedure (S6) of FIG. 2, and calculates an evaluation value for the result of the arrangement positions of the components P1 to P3 determined by the component arrangement position determination means 7. The evaluation value is, for example, a yield with respect to the material W.
The evaluation value comparison means 11 is a means for executing the procedure (S7) in FIG. 2, and compares the evaluation value with a set value as a setting reference. When the evaluation value is equal to or greater than the set value, the process is terminated and less than the set value. If so, the process of returning to the arrangement order determination method selection means 4 is performed.

  The nesting result output means 13 is a means for displaying the result as a graphic on the screen of the screen display device 14 when the evaluation means 8 finishes the process. The nesting result output unit 13 may display the result of the component arrangement position determined by the component arrangement position determination unit 7 in a graphic form on the screen of the screen display device 14.

  The history storage means 10 is a means for executing the procedure (S8) of FIG. 2, and stores the evaluation value together with the arrangement order when returning to the arrangement order determination method selection means 4 with the evaluation result of the evaluation means 8. The history storage means 10 stores the highest evaluation value and its arrangement order as in the procedure (S8).

In addition to the automatic evaluation using the evaluation value as described above, the evaluation unit 8 terminates the process or returns to the arrangement order determination method selection unit 4 according to the external input of the determination result from the external input unit 12. It is good also as what defines whether to perform.
In this case, the nesting result output unit 13 displays the result in a graphic form on the screen display device 14 every time the component arrangement position determination unit 7 determines the component arrangement position. The operator looks at the screen and inputs permission / inhibition by the external input means 12. Note that the nesting result output means 13 may display the result calculated by the evaluation value calculation means 9 together with the drawing of the component arrangement position to support the operator's evaluation.

In the sheet metal nesting apparatus 1 having this configuration, the procedure of the sheet metal nesting program 2 has been described together with FIG. 2, but the flow of the entire process will be briefly described. When the nesting request component data D is given (S1), the arrangement order determination method selection means 4 selects either the first or second method (S2). This selection is performed according to the setting rule R1.
When the first method is selected, the arrangement order determining means 5 for each part changes the arrangement order of all the parts P1 to P3 with respect to the material W regardless of the part type, from the parts P1 ₁ to P1 ₃ and P2 _{1 to} P2 _3. , P3 _{1 to} P3 ₆ .
When the second method is selected, the arrangement order determining unit 6 for each component type determines the arrangement order of all the components P1 to P3 with respect to the material W for each component type. In other words, the parts of the same type are consecutively arranged.
When the arrangement order is determined by any of the methods, the component arrangement position determining means 7 determines the arrangement positions of all the parts P1 to P3 with respect to the material W according to the setting rule R2 in the determined arrangement order.

The result of the component arrangement position determined in this way is evaluated by the evaluation means 8, and it is determined whether or not to adopt the result of the arrangement position. When a sufficient result is obtained, the process is terminated. Otherwise, the process returns to the selection of the first and second methods by the arrangement order determination method selection means 4, the arrangement order determination by the arrangement order determination means 5 for each component or the arrangement order determination means 6 for each component type, and the component arrangement position Determination of the component placement position by the determination unit 7 and re-evaluation by the evaluation unit 8 are performed.
For example, FIG. 3B is an example of an undesirable component placement result. In such a case, the process from selection of the component placement method to placement order determination, placement position determination, and evaluation is repeated. FIG. 3C shows a preferable component arrangement result, and the processing is terminated.

As described above, the optimum arrangement result can be obtained by changing the order of arranging the components in various ways by the iterative process. In particular, as means for determining the arrangement order of parts, it has means 5 for determining the arrangement order for each part and means 6 for determining the arrangement order for each type of component. Since the arrangement order determining method selection unit 4 can select the arrangement order, the arrangement order for obtaining the optimum result can be obtained with a small number of repetitions.
For example, when the arrangement order is variously changed by repeated processing, the arrangement order for each part can be changed by using both the arrangement order determination method for each part and the arrangement order determination method for each part type alternately or on an appropriate basis. Compared with the case where only the order determination method or only the arrangement order determination method for each component type is adopted, the result of the excellent component arrangement position can be obtained with a smaller number of repetitions.
In addition, when the component placement result of each repeated operation is displayed on the screen display device 14 by the nesting result output means 13, various component placement results can be shown, and appropriate evaluation by the operator can be easily performed. be able to.

It is a block diagram which shows the conceptual structure of the sheet metal nesting apparatus concerning one Embodiment of this invention. It is a flowchart of the program for sheet metal nesting concerning one Embodiment of this invention. It is explanatory drawing which shows the result of the component which performs nesting, its unpreferable component arrangement position, and a preferable arrangement position. It is a flowchart of the operation | work of the conventional general sheet-metal processing process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Sheet metal nesting apparatus 2 ... Sheet metal nesting program 3 ... Nesting request | requirement component memory | storage means 4 ... Arrangement order determination method selection means 5 ... Arrangement order determination means 6 for every component ... Arrangement order determination means 7 for every component type ... Component arrangement position determination means 8 ... Evaluation means 9 ... Evaluation value calculation means 11 ... Evaluation value comparison means 10 ... History storage means 12 ... External input means 13 ... Nesting result output means 14 ... Screen display device 15 ... Starting means D ... Nesting request component data P1, P2 , P3, P1 _{1 to} P1 ₃ , P2 _{1 to} P2 ₃ , P3 _{1 to} P3 ₆ ... Part W ... Material

Claims (2)

Nesting request component storage means for storing nesting request component data, which is information defining the type of sheet metal parts to be nested, the required number of parts for each type, and the plane graphic data of the parts for each type;
An arrangement order determining method selecting means for determining which of the first and second methods for determining the arrangement order of the parts with respect to the material is to be selected according to the setting rule;
This is executed when the first method is selected by this selection means, and the arrangement order determining means for each part which determines the arrangement order with respect to the materials of all the parts of the nesting request part data for each part regardless of the part type. When,
Executed when the second method is selected by the selection means, and an arrangement order determining means for each component type for determining, for each component type, an arrangement order for the materials of all the parts of the nesting request part data;
When the arrangement order of the parts is determined by either the arrangement order determination means for each part or the arrangement order determination means for each type of component, the arrangement position of each part with respect to the material in the determined arrangement order is determined as a plane figure of the material. Component placement position determination means determined according to setting rules from data and plane graphic data of the component;
By evaluating the result of determining the arrangement position of the parts by this means on the basis of setting, or by external input, the arrangement order determining method selection means can select the arrangement order again, or the part arrangement position An evaluation means for selecting whether to adopt the arrangement position of the parts determined by the determination means,
Sheet metal nesting device. A program executable on a computer,
A procedure for storing nesting request component data, which is information defining the type of sheet metal parts to be nested, the required number of parts for each type, and the plane graphic data of the parts for each type,
A procedure for determining which one of the first and second methods for determining the arrangement order of the parts relative to the material is to be selected according to the setting rule;
A procedure that is executed when the first method is selected in this method selection procedure, and determines the arrangement order of all the parts of the nesting request part data for each part regardless of the part type;
A procedure that is executed when the second method is selected in the method selection procedure, and determines the arrangement order of the materials of all parts of the nesting request part data for each part type;
When the arrangement order of parts is determined by either the procedure for determining the arrangement order for each part or the procedure for determining the arrangement order for each part type, the arrangement of each part with respect to the material in the determined arrangement order The procedure for determining the position according to the setting rule from the plane graphic data of the material and the plane graphic data of the part,
Return to the arrangement order determination method selection procedure by evaluating the result of determining the arrangement position of the parts in this procedure by setting criteria, or by external input, and select the arrangement order again, or Including a procedure for selecting whether or not to adopt the part placement position determined in the part placement position determination procedure.
Sheet metal nesting program.

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