JPH07121416B2 - Bending order automatic determination device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Industrial field of application) The present invention relates to a device for automatically determining a bending order in a folding machine.

(Prior Art) Conventionally, the bending order in a folding machine is manually determined.

This is to determine, by trial and error, a bending order which is bendable and has good workability in order to appropriately bend a plate material to obtain a product having a predetermined shape such as a box shape.

(Problems to be Solved by the Invention) However, the conventional manual determination of the bending order has the following problems.

Since the bending order is decided by trial and error, it takes a lot of time for the decision work and the efficiency is low.

While displaying each bending process on the display device such as CRT,
It is possible to confirm whether or not it is actually bendable, but for products with a large bending process, the bendable algorithm becomes complicated, so it takes an extremely long time to determine the bending order. is necessary.

In the determination of the bending order by trial and error, the workability is not necessarily good even if the bendable order is determined.
Depending on the case, it is necessary to frequently turn or rotate the plate material.
Can be extremely labor intensive.

Manual determination of bending order is an obstacle to FA.

Therefore, an object of the present invention is to improve the above problems and to automatically determine the bending order in a manner that improves workability.

[Structure of the Invention] (Means for Solving Problems) In view of the conventional problems as described above, the present invention provides a product shape setting unit for setting and storing the shape and size of a product, and an upper and lower metal plate of a folding machine. A machine shape registration unit for registering the machine layout of the mold mounting unit, a mold data registration unit for storing the shapes of various upper and lower molds, and control data for storing the control data of each control axis of the bending machine. A registration unit, a material handling registration unit that stores the material handling of the operator of the bending machine, a plate material and a machine based on the product shape data of the product shape setting unit and the machine layout data unique to the bending machine of the machine shape registration unit. Bending order that makes it easy for the material handling to be searched from a suitable number of deployment loops based on the control data of the control data registration section and the material handling stored in the material handling registration section Automatically Determining bending is made and a ranking automatic determination unit.

(Embodiment) An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an explanatory diagram showing a line arrangement of a folding machine.

As shown in the figure, a computer 1 is arranged on the management room side and a plurality of folding machines 3 are arranged on the site side.
A control device 7 having a CRT 7a is attached to each bending machine 3, and the control device 7 and the computer 1 are connected to each other via a communication line (for example, an optical fiber) 5 so as to be capable of bidirectional communication.

The folding machine 3 has upper and lower molds 9 and 11, and the lower mold 11 is a ram 13
It is fixed to the upper part of and is driven up and down by a cylinder device. Further, the folding machine 3 includes the lower mold
A back gauge (not shown) that can be driven back and forth by a servo motor (not shown) is provided on the back side of 11.

The folding machine 3 bends a plate material (not shown) abutted against the back gauge from the front side at a predetermined angle by driving the lower mold 11 to move upward.

In this example, the computer 1 automatically determines the bending order, and the determined order is sent to the control device 7 via the optical fiber 5, where a predetermined bending operation is performed.

FIG. 2 is a block diagram showing a functional configuration of the computer 1.

As shown, the computer 1 has a product shape setting unit 15
And a machine shape registration unit 17 and a mold data registration unit 19.

The product shape setting unit 15 is connected to a drawing input device, a keyboard and the like, and sets and stores the shape of the product We as shown in the sectional view in FIG.

Shape of the product We can end point P _0, P ₅ and the bending angle A ₁ ~ of the bending points P ₁ to P of each flange between ₄ length H ₁ to H ₅ and each bending point P ₁ to P ₄ Although defined by a _4, in fact, are those sterically defined not planar as shown.

The machine shape registration unit 17 is for registering the machine arrangement of the mounting parts (including the table) of the upper and lower molds 9 and 11 of the folding machine 3 and the back gauge. This is data unique to the machine 3.

The mold data registration unit 19 classifies and stores the shapes of the upper and lower molds 9 and 11 by function. The registration unit 19 is provided separately from the registration unit 17 because the mold is selected from a large number of molds.

The product shape setting unit 15, the machine shape registration unit 17, and the mold data registration unit 19 are connected to the bending order automatic setting unit 21 in a manner that the data set and stored in each unit 15, 17, 19 can be output appropriately. Has been done.

The bending order automatic setting unit 21 is connected to the control data registration unit 23, the material handling registration unit 24, and the communication control unit 25.

The setting unit 15 or the registration unit 17, 19 in the bending order automatic determination unit 21.
The bending order is automatically determined by the method described later based on the data input from the above, and the result is output to the control device 7.

The control data registration unit 23 and the material handling registration unit 25 are used for intermediate processing of the bending order automatic determination unit 21, and are used for the ram of the bending machine 3.
The control data of 13 and the control data of the back gauge are stored, and also the material handling of the operator working on the front surface of the folding machine 3 is stored.

The communication control unit 25 is connected to the optical fiber 5 and controls communication between the computer 1 and the control device 7.

FIG. 4 is a tree structure showing the order in which the point P _{2 of the} product We can be expanded to the end numerically with the point P _{2 of the} product We as the expansion start point.
As shown in the figure, since the illustrated product We has four development points, there are six development loops as described below.

_{P 2 -P 1 -P 3 -P 4} P 2 -P 1 -P 4 -P 3 P 2 -P 3 -P 1 -P 4 P 2 -P 3 -P 4 -P 1 P 2 -P 4 - P ₁ −P ₃ P ₂ −P ₄ −P ₃ −P ₁ However, this loop number 6 is because the expansion start point is set to P _2, and the number of loops when this is not set is 4 times 24
On the street.

Therefore, when the computer 1 is used to search for a loop that can be unrolled, it is important to first determine a predetermined unrolling start point.

FIG. 5 is a flow chart showing a method of determining the development start point (P ₂ ).

In step 501, the variable i indicating the expansion point is set to 1, and in step 502, the bending direction with which the weight is small at the expansion point Pi is determined.

The bending direction in which the weight is small is a direction of the plate material in which the back (front) side becomes heavier than the front side with respect to the mold position at the time of tucking, that is, the tucking is easy.

In step 503, a deployment simulation is performed,
Before and after the deployment, determine whether the plate material and the machine (including the mold) interfere with each other.

If it is determined that there is interference in step 503, this point cannot be adopted as the expansion point.
Move to 504 and set the next expansion point.

If it is determined in step 503 that there is no interference,
The process proceeds to step 505, where the expansion point Pi and the control data in the expanded state at the expansion point Pi (ram 13
Control data, back gauge control data),
Go to step 506.

In step 506, it is judged whether or not the variable i of the expansion point has reached the total number n (4 in the example of FIG. 3), and if i = n,
Considering that all development points have been considered, step 50
Move to 7. If i <n is determined in step 506, the process proceeds to step 504 to consider the remaining expansion points.

In step 507, it is determined whether or not there is one deployable point Pi, and if it is one, the process ends with this point Pi as the deployment start point. If there are a plurality of deployable points, the process proceeds to step 508, where the inner deployable point Pi is selected.

If two more expansion points are determined in step 509, for example, if P ₂ and P ₃ remain in FIG. 3, the one with the smaller number P ₂ is selected in step 510.

By the processing shown in FIG. 5 above, one expansion starting point, for example, the point P ₂ shown in FIG. 3 is selected.

Here, when determining the deployment start point, assuming that the plate and the machine do not interfere with each other, the weight of the luck is small.Select the inner point.The priority in the decision with the lower number is executed. is there. As a result, at least the preparation for determining the bending order in which unreasonable material handling is not controlled at the time of the final bending is completed.

FIG. 6 is a flowchart showing a method of determining the bending order, which is executed after the above procedure.

In step 601, the expansion start point P _S (P _{2 in} the example of FIG. 4) obtained by the processing shown in FIG. 5 is set.

In step 602, the first loop is first set in the tree structure as shown in FIG. 4 which starts from the expansion start point P _S.

At step 603, the numerical value 2 is set to the step number j. The stage number 2 means the next stage number set next to the expansion start point P _S as the first stage, and in the example of FIG.
That is, P ₁ is set.

In step 604, it is determined whether the number of stages j is greater than the total number of stages, that is, the total number of expansions n. If j> n, the loop end is determined in consideration of the fact that the number of stages j exceeds the total number of stages n. Then, the process moves to step 605 and moves to the next loop.
If j ≦ n, the loop is considered to be considered and the process proceeds to step 607.

In step 607, as in step 502 shown in FIG. 5, the bending direction that minimizes the weight of the twisting is determined for the development point Pj, and the process proceeds to step 608.

In step 608, for the expansion point Pj, the previous expansion point Pj _-1
On the other hand, the bending posture is determined so that the material handling required for bending can be done easily. That is, the material handling has not only progressive feeding but also types called small registration marks, rotations, large registration marks, etc. Here, those having good workability are preferentially determined.

In step 609, as in step 503 shown in FIG. 5, the presence or absence of interference between the plate material and the machine is examined.

In step 610, it is determined whether or not there is interference, and if there is interference, it is determined that this loop can no longer be used, and the process proceeds to step 605 even if the number of stages j is in the middle of the total number of stages n,
Move on to verification of the next loop.

If it is determined in step 610 that there is no interference, the process proceeds to step 611, where necessary items are registered and then the process proceeds to step 612. What is required is the expansion point Pj
And the material handling type of Pj with respect to Pj _-1 , control data of Pj, and the like.

In step 612, 1 is added to the variable j, and the verification of the next stage of the loop is started.

In step 606, it is determined that the verification for all the loops has been completed, and if the verification has been completed for all the loops, the process proceeds to step 613. Although a new loop is set by the shift from step 605 to step 603, the processing of steps 607 to 611 can be omitted for the expansion points already registered in step 611 in the newly set loop. .

In step 613, the loop that has reached the terminal is selected.

In step 614, the sum of the material handling difficulty is calculated for each selected loop.

In step 615, the rank of each unrolled point of the loop having the smallest evaluation value is inverted to determine the optimum bending rank of the material handling.

In step 616, the bending loop and the control data required for executing the loop are output to the control device 7 with the material type.

FIG. 7 shows a specific example of the product We shown in FIG.

In this example, the bending start point is set by the processing shown in FIG.
P ₂ is selected, and in the processing of steps 602 to 613 shown in FIG. 6, the expansion order is 3 from the 6 loops shown in FIG.
Narrowed down to the street. Then, by the processing of steps 614 and 615, the one having the smallest materiality difficulty evaluation value (P ₂ → P ₁ → P ₃ →
P ₄ ) is selected, the order is reversed, and the optimal bending order P ₄ →
P ₃ → P ₁ → P ₂ is output.

FIGS. 8A to 8E show display examples of the CRT 7a shown in FIG.

The bending order and the accompanying data transmitted through the optical fiber 5 are used by the operator who operates the folding machine 3 as follows.

First, as shown in FIG. 8 (a), the product shape and setup procedure are displayed on the CRT 7a.

Therefore, when a predetermined key operation after the predetermined setup based on what is displayed, as shown in FIG. 8 (b), as shown bending point P ₄ of a flat plate material W ₀ by a broken line The message that it should be bent is displayed. Further, at this time, the back gauge is positioned at a predetermined position according to predetermined control data.

Therefore, when the operator hits the plate material W ₀ against the positioned back gauge as shown by the solid line in FIG. 8 (b), and operates the foot petal not shown, the ram 13 rises and the plate material W ₀ is shown by the broken line. It is bent as shown to form a plate material W ₁ .

Hereinafter, the back gauges are sequentially shown in FIGS. 8 (c), (d),
Since it is automatically positioned at the position shown in (e), the plate materials W ₁ , W ₂ , W ₃ that have been sequentially bent are given a predetermined material handling,
By pushing the foot petal while pushing the end faces of W ₁ , W ₂ , W ₃ against the positioned back gauge, the product We
Can be obtained.

The operator should always proceed with the work according to the instructions of CRT7a, so there is no confusion in the material handling,
Efficient bending work can be performed. Where CRT7
The material handling shown in a is the easiest through the entire folding process as described in FIG.

FIG. 9 is a flow chart showing a developing method when the number of developing stages is large (for example, 10 stages).

In step 901, the total number of stages n _{0 is changed} to the number of intermediate stages n ₁ (for example, 5
Cut with a step.

In step 902, a loop that can be expanded with respect to the tree structure up to n ₁ stages is selected by the same processing as the processing up to step 614 shown in FIG. 6, and a number of good material handling loops are selected from the selected loops. (Three, for example) are detected.

In step 903, the number of stages n ₁ or less is verified only for the detected a loops.

In steps 904 and 905, the best material handling loop is selected from the loops reaching the terminal, the optimum deployment order is obtained, and this is inverted to obtain the optimum bending order.

By the processing shown in FIG. 9, it is possible to narrow down the number of loops in a more suitable form for a tree structure in which the number of loops is extremely large, and it is possible to significantly increase the processing speed of the computer 1.

If there is a part where dimensional accuracy is a problem, select the deployment order in which one end of both ends of that part is the abutting point of the other end, and the workability is the best from the selected loop. Should be extracted. Also, considering the diagonal butting,
You can try to avoid this as much as possible. Furthermore, these conditions can be set on the user side.

The present invention is not limited to the above-mentioned embodiments, but can be carried out in other modes by making appropriate design effects.

[Effects of the Invention] As will be understood from the above description of the embodiments, the present invention is, in short, the product shape setting unit (15) for setting and storing the shape and size of the product (We), and the bending machine (3). ) Machine shape registration section (17) for registering the machine layout of the upper and lower mold (9, 11) mounting parts, etc., and a mold data registration section (19) for storing the shapes of various upper and lower molds, A control data registration unit (23) that stores control data of each control axis of the folding machine (3), a material handling registration unit (24) that stores the material handling of the operator of the folding machine (3), and the product shape setting Based on the product shape data of the part (15) and the machine configuration data unique to the folding machine (3) of the machine shape registration part (17), the product (We) can be expanded without the plate material and the machine interfering with each other. An appropriate number of loops are searched, and the control data and material handling registration unit (24) of the control data registration unit (23) are also searched. Material handling from the expanded loop appropriate number based on the stored material handling of those which is provided with automatically determining bending order automatically determining section (21) to facilitate bending order.

Therefore, according to the present invention, when the shape and dimensions of the product We are set, an appropriate number of expansion loops capable of expanding the product without the plate material and the machine interfering with each other are automatically searched for, and a material handling machine is selected from the expansion loop. Since the easy bending order is automatically determined, the bending order of the products can be easily determined, and the work efficiency can be easily improved.

[Brief description of drawings]

Each of the drawings shows an embodiment of the present invention, FIG. 1 is an explanatory view showing an arrangement of folding lines showing a position of a computer capable of carrying out the present invention, and FIG. 2 is a block showing a functional configuration of the computer. Fig. 3 is a sectional view showing an example of a product, Fig. 4 is an explanatory diagram of a tree structure, Fig. 5 is a flow chart of a method of determining a development start point, Fig. 6 is a flow chart of a method of determining a bending order, and a seventh. FIG. 8 is an explanatory view showing the result of applying the processing shown in FIGS. 5 and 6 to the product shown in FIG. 3, FIG. 8 is an explanatory view showing a display example of the CRT, and FIG. 9 shows a large number of development stages. It is a flow chart which shows a deployment method in a case. 1 …… Computer 3 …… Bending machine 21 …… Bending order determination part P _{1 to} P ₄ …… Development point (folding point) We …… Product W ₀ , W ₁ , W ₂ , W ₃ …… Plate material

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroyuki Omura 200 Ishida, Isehara-shi, Kanagawa Amada Co., Ltd. (72) Inventor Yasuo Mochizuki 200 Ishida, Isehara-shi, Kanagawa Amada (72) Inventor Kentaro Kojima 1-25-1 Nishishinjuku, Shinjuku-ku, Tokyo Inside Amtec Co., Ltd. (72) Inventor Nobuhiko Sato 1-25-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo Within Amtech (56) Reference JP-A-57-195537 (JP, A) JP 59-47024 (JP, A)

Claims (1)

[Claims] 1. A product shape setting section (15) for setting and storing the shape and dimensions of a product (We) and upper and lower molds (9, 9) of a bending machine (3).
11) A machine shape registration unit (17) for registering the machine layout of the mounting parts, a mold data registration unit (19) for storing the shapes of various upper and lower molds, and each of the bending machines (3). A control data registration unit (23) that stores control data of the control axis, a material handling registration unit (24) that stores the material handling of the operator of the folding machine (3), and product shape data of the product shape setting unit (15). And based on the machine layout data unique to the folding machine (3) of the machine shape registration unit (17), a suitable number of development loops capable of developing the product (We) without interference between the plate material and the machine are searched, and A bending order automatic determination section (21) for automatically determining a bending order that is easy for the material handling machine from a suitable number of unfolding loops based on the control data of the control data registration section (23) and the material handling function stored in the material handling registration section (24). ) And a bending order automatic determining device characterized by comprising: .