JP7023133B2 - Bending machine and mold opening amount determination method - Google Patents

Description

The present invention relates to a bending machine for determining the opening amount between the upper mold and the lower mold, and a method for determining the opening amount of the mold.

In the bending machine, the material to be processed (work) is sandwiched between the upper and lower dies and bending is performed. At that time, the upper and lower dies are opened in order to take out the work. do.

Conventionally, the opening amount in the die opening operation has been determined according to the shape of the currently machined work from the judgment that the currently machined work should be taken out.

JP-A-2002-361326 Japanese Unexamined Patent Publication No. 2014-233741 JP-A-2009-106972

However, in the conventional mold opening amount determining method as described above, the opening amount of the upper and lower molds is determined based only on the shape after processing in the current process.

Therefore, in the next process, depending on the shape of the part, 1) the worker cannot insert the part because the opening amount of the mold is insufficient, and 2) the inserted work is hidden behind the mold. , There was a problem that it was difficult to visually check whether the work arrangement was correct.

Therefore, in some cases, the worker had to reset the opening amount or take a posture of looking into it.

When the opening amount is reset, it takes time to reset the opening amount, which causes an increase in working time. In addition, when the worker takes a peeping posture, there is a case where it becomes dangerous due to an unreasonable posture.

Further, changing the opening amount (operating the machine) between the current process and the next process is dangerous because the posture of the worker and the positional relationship of the work are unknown.

The present invention has been made by paying attention to the above circumstances, and an object of the present invention is to provide a bending machine capable of setting an optimum mold opening amount and a mold opening amount determining method.

The present invention is for solving the above-mentioned problems, and is an apparatus or method having the following features.

1) It is a bending machine that bends the work in cooperation with the lower mold and the upper mold, so that the operator can visually recognize the contact with the abutment of the work when the work is carried in. It is a bending machine characterized by being provided with a mold opening amount determining device for determining a required mold opening amount.

2) It is a bending machine that bends the work in cooperation with the lower mold and the upper mold.
The first mold opening amount required to carry out the machined work, the second mold opening amount required to carry in the work to be machined next, and the operator thrust the work when carrying in the work. The third mold opening amount required for visually recognizing the contact with the pad is obtained, and the maximum of the first mold opening amount, the second mold opening amount, and the third mold opening amount is obtained. It is a bending machine characterized by selecting the opening amount of the die and performing the opening operation of the die.

3) A mold opening amount determining method for determining the opening amount between the upper mold and the lower mold in a bending machine that bends a work in cooperation with the lower mold and the upper mold. The step of obtaining the first mold opening amount required for carrying out the processed work, the step of obtaining the second mold opening amount required for carrying in the work to be processed next, and the above-mentioned work. The step of obtaining the third mold opening amount necessary for the operator to visually recognize the contact of the work with the abutting surface, the first mold opening amount and the second mold opening amount, and the second mold opening amount. A method for determining a mold opening amount, which comprises a step of selecting the maximum opening amount among the third mold opening amounts and a step of performing a mold opening operation with the maximum opening amount. be.

According to the present invention, it is possible to set the minimum mold opening amount capable of carrying out all of the work being carried out, the work being carried in, and the contact with the abutment of the work being visually recognized.

It is a schematic whole view of the bending machine which carried out this invention. It is an internal block diagram of NC apparatus 7. It is the schematic explanatory drawing of the bending operation in the bending machine 1 shown in FIG. It is a flowchart of the parameter setting method used in the mold opening amount determination method which carried out the present invention. It is a flowchart of the mold opening amount determination method which carried out the invention of this application. It is a schematic explanatory drawing for demonstrating how to obtain the 3rd mold opening amount h3.

FIG. 1 is a schematic overall view of a bending machine according to the present invention.

As shown in FIG. 1, this bending machine 1 cooperates with a lower mold (die) 3 supported by a mold holder and a lower mold (die) 3 to form a material (work) such as a plate material. It has an upper die (punch) 5 for bending, and is connected to an NC device 7 as a control unit for controlling the entire processing machine.

FIG. 2 is an internal configuration diagram of the NC device 7.

As shown in FIG. 2, the NC device 7 includes a CPU 9, a RAM 11, a ROM 13, a display 15, and an input keyboard 17 connected to the CPU 9.

In the RAM 11 of the NC device 7, work information, product information, machining programs, and other machining information necessary for the next bending machining are acquired from CAM / CAD or the like connected by LAN or the like.

The NC device 7 constitutes a mold opening amount determining device that executes a mold opening amount determining method described later.

FIG. 3 is a schematic explanatory view of a bending operation in the bending machine 1 shown in FIG.

The bending operation in the bending machine 1 is performed in the following process.

In step 1, as shown in FIG. 3A, the lower mold (die) 3 and the upper mold (punch) 5 are opened with an opening amount h determined as described later, and the die 3 is opened. A predetermined abutment 21 is provided behind the punch 5 and the punch 5. Here, the opening amount h is the distance between the upper end of the die 3 and the lower end of the punch 5.

In step 2, as shown in FIG. 3B, the operator inserts a material (work) W such as a plate material between the die 3 and the punch 5 and carries the work W until it comes into contact with the abutting 21.

In step 3, as shown in FIG. 3C, the punch 5 is lowered to bend the work W based on the pedal operation of the operator or the like.

In step 4, as shown in FIG. 3D, the operator was bent in a state where the punch 5 was raised and stopped based on a predetermined die opening amount described later with the end of the bending process. Carry out the work W.

In the bending method of the work W as described above, paying attention to the opening operation of the die, the die is opened, the work W is carried out in the bending process, and then in the next bending process. The work W is brought in in this order.

Next, in the bending process of the work W, the die opening amount h when opening the die 3 and the punch 5 with the end of the bending process as shown in FIG. 3D is determined. A method for determining the opening amount will be described.

First, in determining the mold opening amount, predetermined parameters are set in advance. More details are as follows.

FIG. 4 is a flowchart of a parameter setting method used in the mold opening amount determining method according to the present invention.

As shown in FIG. 4, in steps 101 and 103, as shown in FIG. 6, the operator's viewpoint height H (first parameter) and the distance L2 (second parameter) between the operator and the bending machine 1 Set a parameter consisting of.

Here, the operator's viewpoint height H is the distance from the height of the upper end of the die 3 to the height of the operator's eyes.

There are the following methods for obtaining the viewpoint height H of the operator and the distance L2 between the operator and the bending machine 1.

1) How to obtain H The value obtained by subtracting the height of the upper end of the die 3 of the bending machine 1 and the distance between the crown and the eyes from the average height of an average adult is defined as the viewpoint height H of the operator. It is set in the RAM 11 of the NC device 7 in advance.

As another method, the viewpoint height H of the operator may be set and selected for each unique operator.

2) How to find L2 Distance between the operator and the bending machine 1 The way to find L2 is the distance between the standing position of the general operator and the die 3.

As another method, the distance L2 between the operator and the bending machine 1 may be set and selected for each unique operator.

FIG. 5 is a flowchart of the mold opening amount determination method according to the present invention.

Here, the mold opening amount is determined before the die 3 and the punch 5 are opened, and the die 3 and the punch 5 are opened based on the determined mold opening amount.

In step 201, the first mold opening amount h1 required for carrying out the processed work W is obtained from the height of the processed work W (see FIG. 3D).

That is, in general, the CPU 9 obtains a value obtained by adding a predetermined margin interval to the height of the machined work W based on the machining information stored in the RAM 11, and sets the RAM 11 as the first mold opening amount h1. Remember in.

Specifically, the height of the work W generated by the bending process of the work W is calculated from L1 * sin (bending angle ÷ 2 (usually 45 °)), and a predetermined margin interval is added to this. The mold opening amount h1 of No. 1 is set (see FIG. 3D).

Here, L1 is a flange dimension of the distance from the die 3 to the abutting 21 in the work W.

As described above, the height h1'of the work W after being processed is obtained based on the work information stored in the RAM 11, the product information, the processing information such as the processing program, and the like.

In step 203, the second mold opening amount h2 required for carrying in the work W to be processed next is obtained.

That is, the CPU 9 obtains a value obtained by adding a predetermined margin interval to the height (flange height) of the work W to be carried next based on the machining information stored in the RAM 11, and the second mold opening amount. Stored in RAM 11 as h2.

The height (flange height) of the work W to be machined next is obtained based on the work information stored in the RAM 11, product information, machining information such as a machining program, and the like.

In step 205, the third mold opening amount h3 required for visually recognizing the contact of the carried-in work W with the abutting 21 is obtained.

That is, the CPU 9 is required to allow the operator to visually check whether or not the work W to be processed next is appropriately in contact with the abutting 21 based on the processing information stored in the RAM 11. h3 is obtained and stored in the RAM 11 as the third mold opening amount.

More details are as follows.

Here, the third mold opening amount h3 is obtained based on the positional relationship between the operator and the tip of the work W.

FIG. 6 is a schematic explanatory view for explaining how to obtain the third mold opening amount h3.

As shown in FIG. 6, the distance from the die 3 to the abutting 21 in the work W is defined as the flange dimension L1, the distance between the operator 23 and the die 3 is defined as the distance L2, the height of the upper end of the die 3 and the eyes of the operator 23. Assuming that the distance from the height is the viewpoint height H of the operator and the distance between the upper end of the die 3 and the lower end of the punch 5 is h3', the relationship of L1: h3'= (L2 + L1): H is established.

Therefore, H × L1 = h3 ′ × (L2 + L1), h3 ′ = H × L1 / (L2 + L1), and the third mold opening amount h3 (= h3 ′ + α (error margin value)) is h3 = H. × L1 / (L2 + L1) + α (error margin value).

Here, the flange dimension L1 in the work W is set in the machining information stored in the RAM 11, and the distance L2 between the operator 23 and the die 3 and the viewpoint height H of the operator 23 are described in FIG. It is set as a parameter like.

Therefore, the CPU 9 calculates h3 = H × L1 / L2 + L1 + α (error margin value) to obtain the third mold opening amount h3.

The mold opening amount h3 is the mold opening amount at which the operator can visually recognize the tip portion of the work W when the work W is carried in.

Here, since there is a possibility that a setting error may occur in the distance between the operator 23 and the bending machine 1 and the opening amount h, the error margin value α is added.

In step 207, the maximum opening amount hx among the first to third mold opening amounts h1 to h3 obtained in steps 201, 203, and 205 is obtained.

That is, the CPU 9 compares the first to third mold opening amounts h1 to h3 to obtain the maximum opening amount hx.

In step 209, the maximum opening amount hx obtained in step 207 is determined as the mold opening amount in the next bending step.

A specific example will be described below.

Here, a case where the second step is performed following the first step will be described.

In this specific example, the plate thickness T of the work W is 3 mm, the flange size of the work W is L1 = 400 mm, the distance between the operator 23 and the bending machine 1 is L2 = 30 mm, and the viewpoint height of the operator is H = 450 mm. The error margin value α = 2 mm.

First, in the first step, the first mold opening amount h1 required for carrying out the processed work W is 30 sin 45 ° + 2 mm = 23.2 mm.

In the next second step, when carrying in the plate-shaped work W, the second mold opening amount h2 required for carrying in is the plate thickness T of the work W, and in the case of this specific example, the plate of the work W. The thickness is T + 2 mm = 5 mm.

In the second step, the third mold opening amount h3 required for visually recognizing the contact of the work W with the abutting 21 is 450 mm × 30 mm ÷ 430 mm + 2 mm = 33.4 mm.

In the case of this specific example, since h3 (33.4 mm)> h1 (23.2 mm)> h2 (5 mm), the third mold opening amount h3 (33.4 mm) is the maximum opening amount hx. ..

Therefore, the mold opening amount in the first step is 33.4 mm.

In step 211, the next bending step is performed with the mold opening amount set in step 209.

In step 213, it is further determined whether or not there is a next bending process, and if there is a next bending process, the process returns to step 201, and if there is no next bending process, the mold opening amount determination process is completed. do.

As described above, according to the embodiment of the present invention, the first mold opening amount h1 required for carrying out the processed work W and the second mold required for carrying in the work W to be processed next. The opening amount h2 and the third mold opening amount h3 necessary for visually recognizing the contact of the work W with the abutting 21 are obtained, the maximum opening amount among them is selected, and the mold opening operation is performed. Therefore, it is possible to always open the mold with the optimum amount of mold opening.

In other words, it becomes possible to set the minimum mold opening amount capable of carrying out the work W, carrying in the work W, and visually recognizing the contact of the work W with the abutting 21.

The present invention is not limited to the embodiment of the above-mentioned invention, and can be carried out in other embodiments by making appropriate changes.

That is, in the above embodiment, the mold opening amount required for carrying out the machined work W is set as the first mold opening amount, and then the work is performed, based on the die opening operation in the bending work of the work W. The mold opening amount required for carrying in the work W is defined as the second mold opening amount, and the mold opening amount at which the operator can visually recognize the tip of the work when the work W is carried in is the third mold opening amount. The maximum opening amount was selected as the mold opening amount of the mold, and the mold opening operation was performed.

The mold opening amount required for carrying in the work W to be machined is defined as the first mold opening amount, and the mold opening amount at which the operator can visually recognize the tip portion of the work W is defined as the second mold opening amount. The mold opening amount required for carrying out the processed work W is obtained as the third mold opening amount, and the maximum opening amount among them is selected to perform the mold opening operation. good.

1 ... Bending machine 3 ... Lower mold (die)
5 ... Upper mold (punch)
7 ... NC device 9 ... CPU
11 ... RAM
13 ... ROM
15 ... Display 17 ... Input keyboard 21 ... Butt 23 ... Operator h1 ... First mold opening amount h2 ... Second mold opening amount h3 ... Third mold opening amount

Claims (3)

It is a bending machine that bends the work in cooperation with the lower mold and the upper mold.
A bending machine comprising a mold opening amount determining device for determining a mold opening amount required for an operator to visually recognize contact with abutting of the work when carrying in the work. It is a bending machine that bends the work in cooperation with the lower mold and the upper mold.
The first mold opening amount required to carry out the machined work, the second mold opening amount required to carry in the work to be machined next, and the operator thrust the work when carrying in the work. The third mold opening amount required for visually recognizing the contact with the pad is obtained, and the maximum of the first mold opening amount, the second mold opening amount, and the third mold opening amount is obtained. A bending machine characterized in that the opening amount of the die is selected and the opening operation of the die is performed. It is a mold opening amount determination method for determining the opening amount between the upper mold and the lower mold in a bending machine that bends a work in cooperation with the lower mold and the upper mold. hand,
The process of obtaining the first mold opening amount required for carrying out the processed work, and
The process of obtaining the second mold opening amount required for carrying in the work to be processed next, and
A step of obtaining a third mold opening amount required for the operator to visually recognize the contact of the work with the abutting surface when the work is carried in.
The step of selecting the maximum opening amount among the first mold opening amount, the second mold opening amount, and the third mold opening amount, and the process.
A method for determining a mold opening amount, which comprises a step of performing a mold opening operation with the maximum opening amount.

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