JP2642156B2 - Process setting method and process setting device for bending machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a process setting method and a process setting device for performing loose bending by a bending machine.

(Prior Art) In general, when bending a work W in a bending machine, first, as shown in FIG. 14, a 90 degree bending process is performed at a bending point 2 and then the work W is turned over and bent. At the bending point 1, a step of bending at 90 degrees is also performed.

However, if such a bending step is taken,
As shown in FIG. 15 (a), after the bending point 2 is bent, when the work W is set on the lower die to bend the bending point 1, the work W Side die D
The work W may not be able to be set at a predetermined position on the lower die D.

Therefore, as shown in FIG. 15 (b), the bending point 1 of the work W is previously bent at a shallow bending angle, the bending point 2 is subjected to a bending process of 90 degrees, and then the bending point 1 is again subjected to the normal bending. When setting the work W on the lower die D so as to bend to an angle of 90 degrees, the work W is prevented from interfering with the die D, and in this state, the bending point 1 is bent at a regular angle of 90 degrees. Is required.

FIG. 16 shows such a rough bending process. One end 0 of the work W is abutted against the abutting member C of the bending machine as shown in FIG. The workpiece W is turned upside down as shown in FIG.
After bending at 90 degrees, additional bending is performed again at bending point 1 as shown in FIG. 3 (c), and bending point 1 is bent to 90 degrees, which is the minimum target bending angle, and the workpiece having the original shape is bent. W is bent and formed.

(Problems to be Solved by the Invention) However, in a conventional bending machine, a process setting method for automatically performing such a rough bending process is not known. Automatically checks the interference between the lower die and the workpiece, and if there is a possibility of interference, automatically sets the bending process,
A process setting device that avoids interference between the die and the workpiece has not been known.

The present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a bending process setting method that allows a folding machine to automatically perform bending.

The present invention also automatically performs an interference check by inputting a workpiece shape and a bending process,
It is an object of the present invention to provide a process setting device that can automatically set a bending process when there is a possibility of occurrence of interference.

[Structure of the Invention] (Means for Solving the Problems) According to a method for setting a process of a bending machine of the present invention, a number is sequentially assigned to each bending point from one edge side in a developed shape of a work, and each bending is performed. By inputting the bending length and the bending angle for each point and inputting the workpiece shape, then, for the workpiece shape, sequentially input the abutting point and the bending point in the order of the bending step by the above-mentioned number, At a specific bending point where a rough bending is required, an input of the rough bending identification signal and a shallow bending angle for the rough bending is provided.

Further, the process setting device of the present invention includes a bending process setting means, and an interference check for simulating a bending process of a work based on an input of the bending process setting means and performing an interference check between the work and upper and lower dies. Means, and when the interference checking means finds that interference occurs at the time of bending at a specific bending point, finds a bending point that needs to bend in order to avoid interference at that specific bending point, and A rough bending setting means is provided for automatically setting a rough bending identification symbol and a rough bending angle for a point bending process input.

(Function) In the process setting method for a bending machine according to the present invention, when a work is bent into a predetermined shape, the work shape is input, and the bending process sequence is sequentially input for the work shape. For parts that need to be loosely bent at the time of inputting the bending process, enter the rough bending identification symbol and the bending angle of the rough bending, and set the rough bending process in the work bending in the same way as other normal bending processes. You.

Further, in the process setting device of the bending machine of the present invention, the work shape and the work bending process are input by the bending process setting means, and the work bending process input by the interference check means is simulated, and Check for interference with the die.

Then, when a bend point where interference between the work and the die occurs is found in this interference check, a bend point that requires a round bend is automatically searched for in order to avoid interference at that particular bend point, In the bending step of the bending point that requires the rough bending, the rough raising step is automatically set, and thus the rough bending step can be automatically set only by inputting the setting of the normal bending step.

(Embodiment) FIG. 1 shows a bending machine 1, which has an upper apron 3 and a lower apron 5. A punch 7 is fixed below the upper apron 3, and a die 9 is fixed above the lower apron 5 with a plurality of bolts 11 via a mold holding member 13. In this case, the upper apron 3 or the lower apron 5 is inserted, for example, from the right with the bolt 11 loosened, and the bolt 11 is fixed again by tightening it at an appropriate position.

A front cover 17 having a tool stand 15 extending in the left-right direction is provided on the front surface of the lower apron 5.

The movable operation panel 19 and the movable foot petal device 21 issue a command to move the lower apron 5 up and down. Operation panel
19 allows input of necessary information to the NC device.

A back gauge 25 is provided in the work processing space 23 between the upper apron 3 and the lower apron 5 of the bending machine 1 as shown in detail in FIG. This back gauge 25
Is provided with a plurality of supports 27 projecting rearward near the left and right ends of the lower apron 5. The support 27 has an electric motor 29
And a linear motion guide 33 parallel to the lead screw 31.

A movable base 35 is provided on the lead screw 31 and the linear motion guide 33. A beam 37 is horizontally passed between the left and right movable tables 35, 35, and the height can be adjusted by a lifting drive device 39.

The back gauge 25 is attached to the beads 37 so as to be able to position left and right. Then, on the front surface of the back gauge 25, an abutting member 41 is provided. This butting member
The height of the beam 41 is set by the lifting drive 39 of the beam 37.

When bending a work by the above-mentioned bending machine, first, the work is inserted into the work processing space 23 of the bending machine 1 and the front end of the work is contacted with the end of the butting member 41 of the back gauge 25 which has been gauged. Hit the surface. Subsequently, the lower apron 5 is driven with respect to the upper apron 3 to bend the work between the punch 7 and the die 9. These series of operations are performed automatically by the NC device.

FIG. 3 is a flowchart showing one embodiment of a method for setting a bending process of a work of a predetermined shape by the bending machine 1.

Now, when bending a product into a shape as shown in FIG. 4, it is necessary to give an input of the shape of the workpiece to the NC device. Therefore, first, the material, the thickness, and the mold information of the work W are inputted, and the numbers 0, 1, 2,... Are sequentially arranged at one bending point from one end of the work W as shown in FIG. Enter the bending length and bending angle for each.

In the shape input data format shown in FIG. 5, bending point 1 is bent at 90 degrees and bending point 2 is bent at 90 degrees in the opposite direction to bending point 1 (step 10).
1).

After input of such shape data, a process input is performed in the data format shown in FIG. 6 (step 102).

The input of the bending step indicates that in the first bending step, the abutting point against the abutting member is 0, and the bending point 1 indicates a position set on the lower die 1. In the second bending step, the point 3 of the workpiece W is abutted against the abutting member 41, and the point 2 is set as a bending point.

Furthermore, in this process input, in the case of the embodiment, since it is necessary to perform the round bending in the process number 1, the contact point 0
When an input 0 is given to indicate that the abutment member 41 is abutted against the abutment member 41, a loose identification code is input as a loose bend identification symbol, and a loose bend angle is input.

Thereafter, a normal bending step 2 is input, and after this normal bending step, an additional bending step for performing additional bending at the bending point 1 in the third step is input.

When the input of the workpiece shape and the input of the bending process are completed, the NC device side extends in accordance with the workpiece product shape, the back gauge position, the stroke position, the abutting vertical position,
Calculations such as a pullback amount, a bending speed, and an inversion method are performed according to the calculation program (step 103), command values of respective axes are also calculated (step 104), and the calculation results are displayed (step 105).

In the display at step 105, FIGS. 16 (a) to 16 (c)
Are displayed, and the respective displays "bent bending" and "bend re-stretching" indicating the rough bending step and the additional bending step are simultaneously displayed in the process diagram.

Until there is additional bending after rough bending, the shape of the workpiece W is displayed at the rough bending angle for the bending point 1 where rough bending has been performed.

Then, in the step after the additional bending is performed, the display at the position bent at the regular bending angle is performed.

Thus, the input of the work shape and the input of the bending process sequence are completed, and after the operator confirms the correctness of the input data by displaying the bending process, the bending operation is started (step 106).

In this manner, in the method for setting a bending machine according to the embodiment of the present invention, the rough bending process is designated by the input keyboard or other input means in the input of the work shape and the input of the bending process sequence. Settings and
The screen display of the rough bending process can be obtained, and the operator can confirm the rough bending process on the screen display of the NC device.

FIG. 8 shows a process setting device of the bending machine of the present invention,
Work shape input means 20 usually composed of a keyboard
1 and bending step sequence input means 203, these input means 201, 20
Simulate the bending process from the input data by 3, interference check means 205 to perform interference check, correct the bending process if the interference check means 205 finds interference,
Cross-bending process setting means 20 for newly setting the cross-bending process
7, each axis command value calculation means 209 for calculating the command value of each axis according to the total bending process set by the rough bending process setting means 207, bending process display, rough bending process display based on the calculation result by this calculation means 209 And display means 211 for displaying input data.

In the process setting device of this bending machine, as shown in FIGS. 10 (a) to 10 (c), when a bending process is to be performed at a specific bending point P, the bending point P of the work W is more frontward than the bending point P. If there is a risk that the side will interfere with the lower die 9, a bending point P 'which is the bending point on the front side closest to the bending point P and which has a bending angle opposite to the bending point P is found. The automatic bending process is automatically set for the point P '.

Further, as shown in FIG. 10 (d), when an interference is found on the rear side of the lower die 9 and the bending point P when performing bending at a specific bending point P,
A bending point P "which is the rear bending point closest to the bending point P and has a bending angle opposite to the specific bending point P is found, and the rough bending process is set for the bending point P". .

In other words, when the shape input data is given by the input means 201 as shown in FIG. 11 and the normal bending process input data is given by the input means 203 as shown in FIG. Means 207 performs an interference check and a loose bending process setting operation based on the flowchart shown in FIG.

Now, when it is discovered that interference with the lower die occurs at the bending point P in the bending process number n while the simulation of the bending process is being performed by the interference checking means 205 based on the process input data, It is determined whether interference occurs on the front side or the rear side of the lower die 9 (step 301).

When interference occurs on the front side, the bend point P is the closest bend point on the front side to the bend point P found to interfere, and the bend point P and the bend angle have opposite signs. The bending point, that is, the bending point P 'is found, and the bending step is automatically set at the bending step number x for the bending point P' (step 302).
a, 303,304).

In other words, as shown in FIG. 13 (a), at the bending step number x at the bending point P ', the rough bending identification symbol * is displayed,
At the same time, an approximate bending angle is also set, and an additional bending step n 'for the bending point P' is added after the bending step n at the specific bending point P.

If it is found in step 301 that interference occurs on the rear side of the specific bending point P, it is the rear bending point closest to the bending point P and opposite to the specific bending point P. A bending point P ″ having a sign bending angle is found (step 302).

Then, as shown in FIG. 13 (b), the bending point P ″
In order to set the rough bending process for the bending process y, an asterisk (*) symbol is added, and at the same time, the rough bending angle is also set. Further, the additional bending for the bending point P ″ following the bending process n for the specific bending point P is performed. The bending step n 'is added, and the rough bending step is automatically set (steps 303 and 304).

In this way, by performing the normal work shape input and the bending process input, the NC device performs an interference check, and when it is found that interference occurs at a specific bending point, the interference is automatically detected. The loose bending process is set in the bending process before the bending point, and the bending process that does not cause interference can be automatically set.

In addition, after the setting of the rough bending process is automatically performed in this manner, each bending process including the rough bending process is displayed on the display unit 21, and simultaneously the rough bending process and the additional bending process screen are displayed. In each case, "bend" and "rebend" are displayed to allow the operator to confirm.

After the setting of the bending process of the work W is performed in this manner, the operator confirms on the display screen and operates the operation panel 19 or the foot petal device 21 to perform actual bending. When the bending operation at each bending point is completed, the back gauge 25 automatically performs gauging according to a command from the NC device, automatically sets the front-back position and the vertical position of the butting member 41, and sets the lower apron 5 Is automatically set, and the bending operation is sequentially performed according to the bending process set in this manner.

The present invention is not limited to the above embodiments,
Various modifications are of course possible within the scope of the technical idea described in the claims.

[Effect of the Invention] As described above, according to the process setting method of the bending machine of the present invention, when there is a possibility that interference between the lower die and the work may occur at the time of bending at a specific bending point. By setting the step of the rough bending at a required bending point, the occurrence of the interference can be prevented, and the bending of a complicated shape can be smoothly performed.

Further, in the bending machine process setting device of the present invention, when the input of the workpiece shape and the input of the normal bending process cause interference at a specific bending point, the NC device side automatically performs the process. It is possible to automatically check the interference and automatically set the rough bending process at the required bending point so that interference does not occur. For the operator, pay close attention to the interference check and set the bending process You are free from the trouble of inputting, and the burden is greatly reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a bending machine used in one embodiment of the present invention, FIG. 2 is a perspective view of a back gauge device used in the bending machine, and FIG. 3 is an embodiment of the present invention. FIG. 4 is a cross-sectional view showing a work shape obtained in the above embodiment, FIG. 5 is an explanatory view of a work shape input data table necessary for obtaining the work shape, and FIG.
FIG. 7 is an explanatory view of a process input data table necessary for obtaining the workpiece shape, FIG. 7 is a display example showing a bending process sequence for obtaining the workpiece shape, and FIG. 8 is a process setting apparatus of the present invention. FIG. 9 is a block diagram of one embodiment, FIG. 9 is a flowchart for explaining the operation of the above embodiment, and FIGS.
(D) is an explanatory diagram showing the interference pattern of the workpiece in the above embodiment, FIG. 11 is an explanatory diagram of the shape input data table in the above embodiment, FIG. 12 is an explanatory diagram of the process input data table in the above embodiment, FIG. FIGS. 13 (a) and 13 (b) are explanatory diagrams of a data table showing an example of setting of the rough bending process in the above embodiment, FIG. 14 is an explanatory diagram showing a conventional work bending process, and FIG. FIG. 15 (b) is an explanatory view showing a rough bending process for preventing the occurrence of interference, and FIGS. 16 (a) to 16 (c) are explanatory diagrams showing a rough bending process. It is. DESCRIPTION OF SYMBOLS 1 ... Bending machine, 3 ... Upper apron 5 ... Lower apron, 7 ... Punch 9 ... Die, 25 ... Back gauge 41 ... Butt member, W ... Work 201 ... Work shape input means 203: Bending process sequence input means 205: Interference checking means 207: Bending process setting means 209: Axis command value calculation means 211: Display means

Claims (2)

(57) [Claims] In the developed shape of a workpiece, a number is sequentially assigned to each bending point from one edge side, and a bending length and a bending angle are input at each bending point to input a workpiece shape. For the work shape, the abutment point and the bending point are sequentially input by the bending number in the order of the bending process, and at a specific bending point that requires a rough bending, the rough bending identification signal and the rough bending are used. A method for setting a process of a bending machine, characterized by giving an input of a shallow bending angle. 2. A bending step setting means, an interference check means for simulating a bending step of a work based on an input of the bending step setting means, and checking for interference between the work and upper and lower dies. When the checking means finds that interference occurs at the time of bending at a specific bending point, it finds a bending point that needs to be bent in order to avoid interference at that specific bending point, and the bending process of that bending point An apparatus for setting a process of a bending machine, comprising a rough bending setting means for automatically setting a rough bending identification symbol and a rough bending angle for an input.