JP2973691B2 - NC turret punch press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an NC turret punch press used for processing sheet metal products.

[0002]

2. Description of the Related Art In recent years, there has been a demand for user equipment in electronic devices and the like.
Are shifting from the age of mass production to the age of diversification and ultimately individualization. A variety of products have been developed to meet these market needs, and the production form of the products has also been increasing in tendency to produce a large variety of products in small quantities. As a result, the labor for the shaped product of the electronic device is increasing.

That is, with the production of various types of electronic devices, the types of sheet metal products forming outer housings and the like of the electronic devices are increasing. By this, iron plate (material)
A setup operation for changing a die to be mounted on an NC turret punch press for processing and manufacturing sheet metal products from time to time frequently occurs, and a reduction in productivity due to the setup operation is inevitable.

[0004]

SUMMARY OF THE INVENTION The NC in the conventional method
The setup work for setting up the dies when processing sheet metal products of the turret punch press is performed in accordance with the dies setup arrangement information of NC data created in advance. In this case, every time the sheet metal product to be produced changes, the setup and rearrangement of the mold provided in the mold set section must be changed. As the number of types increases, the number of mold rearrangement setup steps increases in proportion. There is a method for determining an optimal solution from all combinations that can be set in an NC turret punch press as a method of determining a mold arrangement with several types of sheet metal products to be processed as one group, but the combination K is K _{= N C nA · nA P nA} × N C nB · N P nA × ... × N C nZ · nZ P nZ where 1 ≦ nA, nB ..., nZ ≦ N NC data - the number of beamlets punch press die arrangement設箇plants : N Grouping target sheet metal products: A, B,..., Z The number of mold types of each of the above sheet metal products is nA, nB,.

An object of the present invention is to treat sheet metal products processed within a certain period of time as one group, and to grasp the frequency of use of a mold used for processing each sheet metal product, thereby increasing the frequency of use. An object of the present invention is to provide an NC turret punch press in which dies are prioritized, and the arrangement of dies is optimized by changing the production order of sheet metal products.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide an NC turret punch press for processing a plurality of types of sheet metal products. The mold and the frequency of use of the mold are obtained, and the frequently used mold is regarded as a basic mold group, and the mold group necessary for manufacturing each sheet metal product is compared with the basic mold group.
Therefore, for the mold group necessary for the production of each sheet metal product,
Set-O indicating the number of molds not included in the basic mold group
Indicates the number of bar types and the number of molds included in the basic mold group
Find the number of crossing species and set the above sheet metal products over the above
Sort in ascending order of genus, and
-If there are sheet metal products of the same number,
Sorted in descending order of the number of intersecting species for sheet metal products
This is achieved by providing a control device for determining the production order of sheet metal products to be processed.

[0007]

When a productivity plan is input, the type of die used for processing a sheet metal product and the frequency of use of each die are determined in accordance with the plan. And, based on this result,
Determine the production order of sheet metal products with less setup work.

[0008] This makes it possible to reduce the number of set-up steps (the number of mold rearrangements). In addition, since the number of setup steps can be reduced in this way, it is possible to reduce setting errors due to the rearrangement of the mold, and to improve the quality.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. First, the outline of the present invention will be described with reference to FIGS.

FIG. 1 is a view schematically showing the configuration of an NC turret punch press (hereinafter referred to as NCT) and its peripheral devices. In FIG. 1, 28 is an NCT main body,
It includes a turret portion 21 for punching a mold and an XY moving portion 26 for freely moving a material (iron plate) 27 in the X and Y directions. A control unit 22 controls the NCT, and a control unit 220 controls the entire control device 22.
And an input unit 221 composed of a keyboard and the like,
A display unit 223 composed of an RT display or the like;
An interface unit 224 for transmitting and receiving control signals to and from the CT, a storage unit 225 for storing a control program, various data bases, and various tables, a floppy disk, etc. And an external storage unit 226 for storing a database, which are connected by an address bus 227, a data bus 228 and a control bus 229, respectively. Here, the control device 22 performs various control processes such as determination of a processing order of sheet metal products, which will be described later, and an instruction to replace a die. Reference numeral 23 denotes a material storage shelf for storing the material, which stores the material for each thickness of the material. The material storage shelf 23 moves up and down like an elevator under the control of the control device 22, and supplies a material having a desired thickness. Reference numeral 25 denotes a material escaping device including a support member 251 having a plurality of suction pads 252 and a cylinder 250 for moving the support member 251 in the vertical direction. The material is transported.

FIG. 2 is a diagram showing an outline of the turret section 21. As shown in FIG. In FIG. 2, the turret 21 is provided with a plurality of mold setting portions 212 for attaching a mold. Further, the turret portion 21 is configured to freely rotate about the rotation shaft 210 and to punch out a die stopped at the punch press portion 211.

FIG. 3 is a diagram showing the outline of the operation when the turret 21 punches out the material 27. As shown in FIG. In FIG.
As described above, the turret portion 21 rotates freely, and the material 27 freely moves in the X and Y directions. As a result, the material 27 is punched into the shape of a die locked at the punch press section 211.

Next, a description will be given of a setup operation for setting a die to NCT when processing a sheet metal. 4 and 5 are diagrams for explaining the outline of the setup work. In this description, it is assumed that the maximum number of mold types that can be set in the NCT is eight.

In FIG. 4, sheet metal products 1, sheet metal products 2, and sheet metal products 3 indicate the types of sheet metal products to be produced, and K1 to K13 are necessary for producing the sheet metal products 1 to 3. The types of the molds are shown. Here, the dies required to produce the sheet metal products 1 and 3 are K1 and K
2, K3, K4, K5, K6, K7 and K8, and the dies necessary for producing the sheet metal product 2 are K1, K2, K
3, K9, K10, K11, K12 and K13.

In order to produce sheet metal products in the order of sheet metal product 1, sheet metal product 2, and sheet metal product 3 under these conditions, first, NC
T is K1, K2, K3, K4, K5, K6, K7 and K
8 is set, and other K9, K10, K11, K12
And K13 are set-over dies to produce sheet metal products 1. Next, when the production of the sheet metal product 1 is completed and the process shifts to the production of the sheet metal product 2, K4, K5, K
K9, K10, K11, K1 instead of 6, K7 and K8
2 and K13 are set. That is, the rearrangement of the mold is performed five times, and the sheet metal product 2 is produced. Next, when the production of the sheet metal part 2 is completed and the sheet metal part 3 is produced, K4, K5, K6, K7 and K8 are set in place of K9, K10, K11, K12 and K13 set in the NCT. .
That is, the rearrangement of the mold is performed five times again, and
To produce. As described above, when sheet metal products are produced in the order of sheet metal product 1, sheet metal product 2, and sheet metal product 3, a total of ten die rearrangements are required.

FIG. 5 is a diagram for explaining a setup operation for producing sheet metal products in the order of sheet metal product 1, sheet metal product 3, and sheet metal product 2 under the same conditions as those described above. First,
K1, K2, K3, K4, K5, K6, K7 and K8 are set on the NCT, and the sheet metal product 1 is produced. Next, the process shifts to the production of the sheet metal product 3. Since the dies required to produce the sheet metal product 3 are the same as those of the sheet metal product,
There is no need to rearrange the mold. When the production of the sheet metal product 3 is completed and the production of the sheet metal product 2 is started, K4, K
K9, K10, K1 instead of 5, K6, K7 and K8
1, K12 and K13 are set to NCT. That is, the die rearrangement is performed five times in total. Thus, 1
When a plurality of types of sheet metal products are produced by a single NCT, the amount of setup work for mold rearrangement differs depending on the production order.

Hereinafter, an outline of a procedure for determining a production order when a plurality of types of sheet metal products are produced by one NCT will be described. As shown in FIG. 6, when the sheet metal product 1, the sheet metal product 2, and the sheet metal product 3 are produced by one NCT, thirteen types of molds are used. In this NCT, the type of mold that can be set (mold set station) is eight stations, and the station includes a mold set fixing part for fixedly setting the mold. , And a mold setting free section in which the mold can be set freely. Under these conditions, the mold is
When setting to CT (8 kinds of molds are set),
They are set in descending order of usage frequency (frequency of use in producing sheet metal products 1, sheet metal products 2, and sheet metal products 3) for each mold. In the case shown in FIG. 6, K1, K2, K3, K4, K5, K
6, K7 and K8 are set in NCT and K9, K1
0, K11, K12 and K13 are set-over molds. In this way, first, a set mold is determined. Next, as shown in FIG. 7, for each sheet metal product, “the number of intersecting die types”
"Set-over mold type number" is obtained. Then, the production order of the sheet metal products is determined based on the number of intersecting die types and the number of set-over die products determined for each sheet metal product.

Next, with reference to FIG. 8, a method of determining the production order of sheet metal products based on the “number of intersecting die types” and the “number of set-over die types” will be described. In FIG. 8, the sheet metal products to be produced are five types of sheet metal products A to E, and the dies required to produce those sheet metal products are K1 to K1.
There are 3 types of 13 types. Here, as described above, the dies are set in the NCT in descending order of use frequency, and the dies to be set are set dies (K1 to K8).

Then, the "number of intersecting molds" and the "number of set-over molds" for the set mold are determined for each sheet metal product. Next, the sheet metal products are sorted in ascending order of the obtained set-over die types. When the number of set-over molds is the same, sheet metal products having the same number of set-over molds are sorted in descending order of the number of intersecting molds. . The order sorted by these two conditions is referred to as a sheet metal product production order. That is, under the conditions shown in FIG. 8, the production order of the sheet metal products is sheet metal product B, sheet metal product E, sheet metal product D, sheet metal product C, and sheet metal product A. As a result, the amount of setup work for rearranging the dies is significantly reduced, and the production efficiency can be improved.

Hereinafter, more detailed processing and operations of the present invention will be described.

FIG. 9 is a diagram showing a flow for carrying out the present invention.

In FIG. 9, first, CAD data such as the XY coordinates, the punching angle, and the die name of the die to be punched for each sheet metal product to be processed is input to the control unit 22 (FIG. 1) (FIG. 1). (FIG. 9, 1001). It should be noted that the control device 22 has a material library (such as a shelf number, a plate thickness, and a plate size)
2) and a library (1003, FIG. 9, 1003) of the mold shape, the sheet metal thickness capable of punching, and the like are registered.

Next, the control device 22 creates machining data in the form of intermediate data for each sheet metal product based on the CAD data, the material library and the mold library (FIGS. 9 and 1).
004). Here, the intermediate data means that the setup arrangement of the mold to be set is not the mold arrangement with respect to the sequencer (not shown) of the NCT, but is the data having the mold name. . Then, the processed data is subjected to grouping of a sheet metal product to be produced, and then to a mold setting section 212 (FIG. 2).
Is determined and the data is converted into a data format for controlling the NCT (details will be described later).

The control unit 22 has NCT mold set arrangement information, and has information on the mold shape that can be set at the mold set position and the name of the currently set mold. Further, the control device 22 can register a frequently used mold so that it can be fixedly set, and can register a constraint condition of the mold set portion in a mold set portion allocation file (1007 in FIG. 9). Necessary information is stored in advance (details will be described later).

When the type of sheet metal product to be produced is input to the control device 22, the input information (1006 in FIG. 9)
And the intermediate data file (FIG. 9 and 1005) and the mold set section allocation file (FIG. 9 and 1007).
A process for determining a production order of sheet metal products and a mold setup arrangement for setting in the mold setting unit 212 is performed (FIGS. 9 and 10).
08).

The processing performed by reference numeral 1008 in FIG. 9 will be described below.

FIG. 10 is a flowchart showing the processing indicated by reference numeral 1007 in FIG. First, when a sheet metal product to be produced is input and an execution request is made, it is determined whether or not a fixed supply mold is selected and registered (FIG. 1).
0, step 101, hereinafter referred to as S101). Here, in the case of no, the fixed set mold is selected and registered, and the mold set section allocation file (FIGS. 9, 10)
07) (FIG. 10, S102). This is shown in FIG.
This will be described in detail below. First, for example, one month schedule 1
11 lists the types of sheet metal products to be produced, and registers a frequently used mold as a fixed set mold by using a mold use frequency calculation table 112 for determining the use frequency of the mold ( (113, 114 in FIG. 11). This process may be automatically performed inside the control device 22. However, the process is selected by the host computer that manages the production plan, and the result of the selection is input to the control device 22. Is also good.

Next, the control device 22 groups the sheet metal products to be processed based on the thickness of the sheet metal products, and produces a group for each sheet metal product having the same thickness (FIG. 10, S103).

Next, the control device 22 controls the mold setting section 21
The dies to be set in the free setting section in the step 2 are selected (FIG. 10, S104). In this process, as shown in FIG. 12, a sheet metal product to be produced is a set (free-set part die product 123) obtained by removing a predetermined fixed set die product 124 from the total used die type 122.

Next, the control device 22 determines whether or not all of the mold parts 123 can be set in the free set part of the NCT (FIG. 10, S105). That is, when the following formula is satisfied, the number of molds that can be freely set in NCT ≧ the number of mold types to be arranged in the free set section (1) is satisfied. Since it can be set in the part 212, the final die setup arrangement is determined by performing comparison and collation with the die set when processing is completed in the previous stage (FIG. 10, S108).
(Details will be described later). If the formula (1) is not satisfied, the primary selection for setting in the free supply unit is performed to determine the loading order (S106 in FIG. 10), and the setup and arrangement order of the dies is determined (S107 in FIG. 10). . That is, for example, FIG.
As shown in FIG. 10, in the molds set in the mold free set section selected in S104 of FIG. 10, the sorting is performed in the order of the molds with the largest number of uses, and the mold of the frame of the mold free set section of the NCT with the large number of uses is used. Select a mold. The set of molds selected at this time is denoted by X (FIG. 13). Next, the number of set-over die types of the sheet metal products A, B, C, D, E to be processed and the die set X is obtained, and the priority of the order of loading is set in ascending order of the number of die types of the set-over. Put on. At this time, when the number of set-over molds is the same, the number of molds intersecting with the mold set X is obtained, and the case where the number of molds is high is changed, and the final injection order is determined. The definition of the number of set-over molds and the number of molds intersecting here will be described using the sheet metal product A.

FIG. 15 is a diagram for explaining the definition. That is, the set over mold type number Hd of the mold set X and the sheet metal product A is represented by (Equation 1).

(Equation 1)

The intersection Hc between the mold set X and the sheet metal product A is represented by (Equation 2).

(Equation 2) Hd and Hc indicate the number of dies included.

In this manner, the set-off operation is performed for each sheet metal product.
Calculate the number of mold types by intersecting the number of mold types. The set-over mold type calculation table 1601 shown in FIG. 16 shows the results obtained by determining the set-over mold type number Hd and the mold type number Hc, respectively, under the conditions shown in FIG. . Then, sorting is performed according to the above-described procedure, and the input order is determined. This is referred to as a loading order calculation table 1602 in FIG.
Shown in Thus, the input order is B, E, D, C, A
Is determined.

Next, a hierarchy level is assigned to the input order determined in the previous step. In this case, the order of charging and the arrangement of the dies to be used are as shown in FIG. 17, but the arrangement of the set-over dies that cannot be completely accommodated in the mold free set portion of the NCT is determined. is there. The determination procedure will be described. First, the mold (mold set X) selected in the previous step is described.
And set-over molds, and each layer (input procedure)
In, the number of distances is obtained. The number of distances described here is defined as follows. With respect to the set-over die, in each hierarchy, the hierarchy of use start is taken, and the number of hierarchies used continuously is defined as the number of distances Fd. That is, taking the mold Kf6 as an example, the number of distances Fd is 2 starting from the layer 4. Further, for the molds of the mold set X, the number of hierarchies in which the molds are not continuously used in each hierarchy is defined as a distance number Kd. This will be described using the mold Kf3 as an example. The number of distances Kd in the story 4 is 2. In order to determine the mold setup arrangement, on condition that equation (4) is satisfied, Kd ≧ Fd (4) Fd and Kd are determined in order for each layer with the most approximate value. . In the case of the state shown in FIG. 17, the setup arrangement of the mold determined by this determination procedure is shown in FIG. Note that FIG.
In the above, Kf8 is forcibly set to the mold fixed set position where the NCT is not used.

When the setup and arrangement order of the dies is determined as described above, the control device 22 then compares and collates with the dies arranged at the end of the processing in the previous stage, and checks the final dies. The setup arrangement is determined (FIG. 10, S108). That is, as shown in FIG. 19, the mold that needs to be set in the hierarchy 1 (injection procedure 1) is compared with the mold that is set in the NCT, and the location where the mold needs to be rearranged is detected. Information 1901 for instructing the die rearrangement is displayed (printed out).
In addition, based on the collation result, as shown in FIG. 20, the determination result of the mold setup arrangement of the layers 2 to 5 (input procedures 2 to 5) is displayed (printed out). By the above-described processing, the input order and the mold setup arrangement are determined. Next, the control device 22 performs nesting (FIG. 10, S1
09). Here, nesting will be described with reference to FIG. In FIG. 21, for example, as a condition for forming a mold, it is necessary to manufacture two molds A1 and one mold A2, and the mold A1 and the mold A2 are iron plates having the same thickness. In the case of (a), the iron plate 2101 and the iron plate 2102 as shown in FIG.
There is a method of making with two iron plates. However, according to this, the area which is not subjected to sheet metal processing increases. On the other hand, as shown in FIG.
If the die is manufactured and punching is arranged so as to manufacture one die A2, the iron plate can be used efficiently. That is, (automatic) nesting is to perform grouping of sheet metal products to be processed with the same sheet thickness, and to automatically determine the arrangement of the punching of the material according to the type of the sheet metal product to be processed and the number of products produced. is there. As described above, reference numeral 100 in FIG.
In step 8, a determination is made of a charging order, a die arrangement, and a punching arrangement of materials (nesting processing) for minimizing die setup.

Next, the controller 22 converts the determined information relating to the mold setup into an NCT database output format that can be recognized by the NCT (FIGS. 9 and 100).
9) Transfer the converted information to NCT. And
The NCT operates according to the received information of the mold setup (FIGS. 9 and 1010).

If such processing is performed by a central control device (host computer or the like) that manages the entire CIM system, the type of sheet metal product to be produced is input to the central control device for a long time. A more efficient production order can be determined from various production plans such as a production plan and a medium-term production plan.

[0038]

As described above, according to the present invention, when a production plan is inputted, an NC for processing a plurality of types of sheet metal products is provided.
A turret punch press, which determines the dies to be used in the manufacture of these sheet metal products and the frequency of use of the dies, and sets the frequently used dies as a basic mold group, which is necessary for the manufacture of each sheet metal product. By comparing the mold group with the above basic mold group ,
For the mold group necessary for the manufacture of each sheet metal product,
Setover variety indicating the number of molds not included in the mold group
And the intersection type indicating the number of molds included in the basic mold group
And the number of the above-mentioned sheet metal products
Sort in ascending order, and the number of
If there are the same number of sheet metal products,
Since a control device for determining the production order of sheet metal products to be processed by rearranging in the descending order of the number of intersecting species is provided, an efficient setup work procedure can be easily obtained, and the work efficiency can be improved and it is possible to improve the quality due to the reduction of preparative work to become.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the overall configuration of an NC turret punch press of the present invention.

FIG. 2 is a plan view showing a configuration of a mold setting section of the NC turret punch press.

FIG. 3 is an explanatory view showing an operation of the NC turret punch press.

FIG. 4 is an explanatory diagram illustrating an outline of a setup operation.

FIG. 5 is an explanatory diagram illustrating an outline of a setup operation.

FIG. 6 is an explanatory view illustrating a procedure for determining a manufacturing order of the NC turret punch press of the present invention.

FIG. 7 is an explanatory diagram illustrating a procedure for determining a manufacturing order of the NC turret punch press of the present invention.

FIG. 8 is an explanatory diagram illustrating a procedure for determining a manufacturing order of the NC turret punch press of the present invention.

FIG. 9 is an explanatory diagram showing a flow for implementing the present invention.

FIG. 10 is a flowchart illustrating a process of determining a production order according to the present invention.

FIG. 11 is an explanatory diagram illustrating step S102 in FIG. 10;

FIG. 12 is an explanatory diagram illustrating step S104 in FIG. 10;

FIG. 13 is an explanatory diagram illustrating step S106 in FIG. 10;

FIG. 14 is an explanatory diagram illustrating step S106 in FIG. 10;

FIG. 15 is an explanatory diagram illustrating step S106 in FIG. 10;

FIG. 16 is an explanatory diagram illustrating step S106 in FIG.

FIG. 17 is an explanatory diagram illustrating step S107 in FIG. 10;

18 is an explanatory diagram illustrating step S107 in FIG.

FIG. 19 is an explanatory diagram illustrating step S108 in FIG. 10;

20 is an explanatory diagram illustrating step S108 in FIG.

FIG. 21 is an explanatory diagram for explaining step S109 in FIG. 10, wherein (a) is an explanatory diagram of a method for creating two iron plates as a condition for creating a mold. (B) is an explanatory view of a method for creating one iron plate as a condition for creating a mold.

[Explanation of symbols]

 22 Control device NCT NC turret punch press

Claims (2)

(57) [Claims] 1. A NC turret punch press for processing sheet metal parts of a plurality of types, the production plan is input, along with determining the frequency of use of the mold and the mold to be used in their manufacture of sheet metal products , A frequently used mold as a basic mold group, and comparing the mold group necessary for manufacturing each sheet metal product with the above basic mold group,
Regarding the mold group necessary for manufacturing metal products,
The number of set-over species indicating the number of molds not included
Calculate the number of intersecting species indicating the number of molds included in the basic mold group.
In order to reduce the number of set-over species,
Plates that are sorted and have the same number of set-over species
If there are gold products, furthermore, the same number of sheet metal products
An NC turret punch press comprising a control device for determining a production order of sheet metal products to be processed by rearranging in the order of the number of intersecting species . 2. An NC turret punch press for processing a plurality of types of sheet metal products, the control device including a control device and a turret portion for punching a die, wherein the control device is configured to input the sheet metal to a sheet metal product. The molds used in the manufacture of the product and the frequency of use of the molds are determined, and the frequently used molds are used as the basic mold group. And compare
Therefore, for the mold group necessary for the production of each sheet metal product,
Set-O indicating the number of molds not included in the basic mold group
Indicates the number of bar types and the number of molds included in the basic mold group
Find the number of crossing species and set the above sheet metal products over the above
Sort in ascending order of genus, and
-If there are sheet metal products of the same number,
Sorted in descending order of the number of intersecting species for sheet metal products
In addition to determining the production order of the sheet metal products to be processed and determining the arrangement of the dies to be set in the turret portion based on the data of the basic die group, the turret portion is determined by the control device. An NC turret punch press for performing a die punching operation for processing a sheet metal product in accordance with the production sequence and the arrangement of the dies.