JPH0246923A - Method and device for setting process for bending machine - Google Patents

Abstract

PURPOSE:To prevent the interference of the lower die and a work and to smoothly execute the bending by inputting a bumping point and a bending point by a bending number in order of the bending process, and inputting its number and a shallow bending angle in a rough bending point. CONSTITUTION:At the time of bending in a specific bending point, in case there is the possibility that an interference of the lower die 9 and a work is generated, the generation of its interference is prevented by setting a process for rough bending simultaneously with other regular bending process. Accordingly, even bending of a complicated shape can be executed smoothly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a process setting method and a process setting apparatus for performing round bending using a bending rock.

(Prior art) In general, when a workpiece W is to be bent in a bending machine, the bending point 2 is first bent at a 90° angle as shown in FIG.
A step is performed in which the workpiece W is subjected to the bending process, and then the workpiece W is reversed and the workpiece W is similarly bent by 90 degrees at the bending point 1.

However, when taking such a bending process, the first
As shown in Figure 5 (a), after bending the bending point 2,
When setting the workpiece W on the lower die to perform the bending process at bending point 1, the workpiece W interferes with the lower die D, causing the workpiece W to be placed at a predetermined position on the lower die D. A situation may occur where it is no longer possible to set the

Therefore, as shown in FIG. 15(b), the bending point 1 of the workpiece W is bent C at a shallow bending angle, and the bending point 2 is bent by 90 degrees, and then the bending point 1 is bent again.
Lower die D to bend up to a regular angle of 90 degrees
It is necessary to perform a so-called round bending process in which the workpiece W is set so as not to interfere with the die D and the bending point 1 is bent at a regular angle of 90 degrees in this state.

Fig. 16 shows such a gentle bending process, and as shown in Fig. 16 (a), one end O of the work W is abutted against the abutment part viC of the bending machine, and a shallow bend is made at the bending point 1. After bending the bending angle slightly, the workpiece W is then reversed as shown in the same figure (b) and bent at the normal angle of 90 degrees at the bending point 2, as shown in this figure (c). The bending point 1 is additionally targeted, the bending point 1 is bent to 90 degrees, which is the minimum target bending angle, and the workpiece W in the original shape is bent.

(Problems to be Solved by the Invention) However, in conventional bending machines, there is no known process setting method for automatically performing such a soft bending process, and the NG wave device of the bending machine is not known. The machine automatically checks for interference between the lower die and the workpiece, and if there is a risk of interference, automatically sets a round bending process.
A process setting device that avoids interference between the die and the workpiece was also unknown.

The present invention has been made in view of these conventional problems, and it is an object of the present invention to provide a bending process setting method that allows a bending machine to self-help perform round bending.

In addition, the present invention provides a process in which interference can be checked on a self-help basis by inputting a workpiece shape and a bending process, and a round bending process can be set on a self-help basis when there is a risk of interference occurring. The purpose is to cover the settings provided by the device.

[Structure of the Invention] (Means for Solving the Problems) The process setting method of the bending machine of the present invention is to sequentially number each bending point from one edge side in the unfolded shape of a workpiece, and The bending length and bending angle are input for each point to input the workpiece shape, and then the abutting points and bending points are sequentially panned in the order of the bending process using the bending number. The present invention is characterized in that, at a specific bending point where a round bend is required, input of a round round bending identification symbol and a shallow bending angle for round bending is provided.

Further, the process setting device of the present invention includes a bending process setting means, and an interference check for simulating the bending process of the workpiece based on the input of the bending process setting means and checking for interference between the workpiece and the upper and lower dies. When this interference checking means discovers that interference occurs when bending at a specific bending point, it finds a bending point that requires a slight bending to avoid interference at that specific bending point, and calculates the bending point. The present invention is provided with a soft bending setting means for automatically setting a soft bending identification symbol and a soft bending angle for inputting a point bending process.

(Function) In the process setting method for a bending machine of the present invention, when bending a workpiece into a predetermined shape, the workpiece shape is inputted, and the bending process order for the workpiece shape is also sequentially inputted. When entering the bending process, enter the soft bending identification symbol and the bending angle of the soft bend for the part that requires soft bending. I can do it.

Further, in the process setting device for a bending machine of the present invention, the bending process setting means inputs the workpiece shape and the bending process of the workpiece, and the interference checking means simulates the inputted bending process of the workpiece. Check for interference with the die.

When a bending point where interference between the workpiece and the die occurs is found in this interference check, a bending point that requires gentle bending to avoid interference is automatically searched for that specific bending point, In the bending process at a bending point that requires round bending, the round bending process is automatically set and overridden, and in this way, the round bending process can also be automatically set just by inputting the settings for the normal bending process.

(Example) FIG. 1 shows a folding machine 1, which has an upper apron 3 and a lower apron 5. A punch 7 is attached below the upper apron 3, and a die 9 is attached above the lower apron 5, respectively, with a plurality of bolts 11 attached to the die gripping part'! A
It is fixed via 13. This is achieved by inserting the upper apron 3 or the lower apron 5 from, for example, the right side with the bolts 11 loosened, and then tightening the bolts 11 again at an appropriate position to fix the apron.

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

The mobile operation panel 19 and the mobile foot control device 21 are
This is to issue an R lowering command for the lower apron 5. Further, the operation panel 19 allows inputting of necessary information related to the NC head.

A bank gauge 25 is provided in the workpiece processing space 23 between the upper apron 3 and the lower apron 5 of the mouth bending machine 1, as shown in detail in FIG. The back gauge 25 includes a plurality of supports 27 protruding in the vicinity of the left and right ends of the lower nibron 5. The support body 27 has a lead screw 31 driven by an electric motor 8129.
and a linear motion guide 33 parallel to this.

A movable table 35 is provided above the lead screw 31 and the linear motion guide 33. This left and right movable platform 35
．． A beam 37 is horizontally extended between 35 and 35, and its height can be adjusted by a lifting drive device 39.

The back gauge 25 is attached to the beam 37 so that it can be positioned left and right. and back gauge 25
An abutting member 41 is provided on the front surface of. The height of this abutment member 41 is determined by the elevation drive device 3 of the beam 37.
9.

When bending a workpiece using the above-mentioned bending machine, first insert the workpiece into the workpiece processing space 23 of the bending machine 1, and insert the tip of the workpiece into the tip of the abutting member 41 of the back gauge 25 that has been gauged. hit it against the surface. Subsequently, the lower apron 5 is driven relative to the upper apron 3, and the workpiece is bent between the punch 7 and the die 9. Note that these series of operations are automatically performed by the NG device.

FIG. 3 is a flowchart showing an embodiment of a method for setting a bending process for a workpiece having a predetermined shape using such bending 811.

In order to bend and form a product into the shape shown in FIG. 4, it is necessary to input the shape of the workpiece to the NG device. Therefore, first, the material, plate thickness, and mold information of the workpiece W are input, and as shown in FIG. 5, numbers 0.1.2.・・・・・・
... and enter the bending length and bending angle for each.

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

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

This bending process input indicates that in the first bending process, the abutting point that overlaps the abutting member is 0 point, and the position where the bending point 1 is set on the lower die 1. Further, in the second bending step, point 3 of the workpiece W is abutted against the abutment-C member 41, and point 2 is set as the bending point.

Furthermore, in this process input J3, in the case of the actual #A example, slight bending is required in process number 1, so when input 0 indicating that the abutment point O is abutted against the abutting member 41 is given, the slight bending is required. Enter *any other identifying code as the identification symbol, and enter the slight bending angle.

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

When such workpiece shape input and bending process input are completed, the NC device side calculates the elongation, back gauge position, stroke position, abutment upper and lower positions,
Calculations such as pullback speed, bending speed, and reversal method are performed according to the calculation program (step 103).
Command values for each axis are also calculated (step 104), and the calculation results are displayed (step 105).

In the display at step 105, FIGS.
At the same time that the process shown in C) is displayed, the respective indications of "soft bending" and "soft bending re-piercing" indicating the soft bending process and the additional bending process are also displayed on the process diagram at the same time.

Further, until there is an additional surface ridge after the round bending, the shape of the workpiece W is displayed at the round bending angle at the bending point 1 where the round bending was performed.

In the process after additional bending is performed, the position bent at the normal bending angle cannot be displayed.

In this way, the input of the workpiece shape and the bending process order is completed, and after the operator confirms the correctness of the input data by displaying the bending process, the bending operation begins (step 106).

In this manner, in the process setting method for the bending machine according to the embodiment of the present invention, when inputting the work shape and the bending process order, the soft bending process can be specified by using the input keyboard or other input means. settings and a screen display of the soft bending process, and the operator can confirm the soft bending process using the screen display of the NC device.

FIG. 8 shows a process setting device for a bending machine according to the present invention, in which a workpiece shape input means 20 usually constituted by a keyboard is shown.
1, bending process order input means 203, and these input means 2
Interference checking means 205 that simulates the bending process from input data according to 01.203 and performs interference checking.
, a soft bending process setting means 207 that corrects the bending process and newly sets a soft bending process when the interference checking means 205 discovers interference;
Each axis command value calculation means 209 calculates the command value of each axis according to the total bending process set by , and a display that performs bending process display, soft bending process display, input data display, etc. based on the calculation results by this calculation means 209 It is constituted by means 211.

In the process setting device of this bending machine, as shown in Fig. 10 (a
) to (C'), when attempting to perform bending at a specific bending point P, if there is a risk that the front side of the work W from the bending point P may interfere with the lower die 9, this Bending point P1. :i is also a nearby bending point on the front side, and a bending point P' having a bending angle opposite to that of the bending point P is found, and a round bending process is automatically set for that bending point P'.

In addition, as shown in FIG. 10(d), a specific bending point P
If interference with the lower die 9 is discovered on the rear side of the bending point P when bending is performed at the bending point P1. : The closest bending point on the rear side, which has a bending angle opposite to the specific bending point P n
is found, and a soft bending process is set for this bending point pn.

That is, the input means 201 gives shape input data as shown in FIG. 11, and the input means 201 gives shape input data as shown in FIG.
When normal bending process input data is given according to 03, the interference checking means 205 and the soft bending process setting means 207 perform interference checking and soft bending process setting operations based on the flowchart 1- shown in FIG.

While the interference checking means 205 is currently simulating the bending process based on the process input data, it has been discovered that interference with the lower die occurs at the bending process number n at bending r'A P k:. If so, it is determined whether interference occurs on the front side of the lower die 9 or on the rear side (step 301).
.

When interference occurs on the front side, the bending point is the closest bending point on the front side to the bending point P where the interference was found, and the bending angle is opposite to that of the bending point P. A bending point, that is, a bending point P- is found, and a soft bending process is automatically set at the bending process number χ for this bending point P' (step 302a).
, 303°304).

In other words, as shown in Fig. 13 (a), a soft bending identification symbol * is displayed at the bending process number Next to n, an additional bending process opening for the bending point P' is added.

In addition, in step 301, if it is discovered that interference occurs on the rear side of a specific bending point P, the rear bending point closest to the bending point P and opposite to the specific bending point P is detected. Find the bending point p n with a bending angle of sign (
Step 302).

Then, as shown in FIG. 13(b), this bending point p
To set a soft bending process for bending process y of n*
Attach a symbol, set the slight bending angle at the same time, and then add a bending process n' for bending point pn after the bending process n for a specific bending point P, and in this way, the slight bending process is automatically performed. (Step 303.
304>.

In this way, by inputting the normal workpiece shape and bending process, the NC device will check for interference, and if interference is found to occur at a specific bending point, it will be automatically corrected. By setting a soft bending process in the bending process before the bending point, it is possible to automatically set a bending process that does not cause interference.

After the setting of the soft bending process is automatically performed in this way, each bending process including the soft bending process is displayed on the display means 21, and at the same time, the screen for the soft bending process and the additional bending process is displayed. ``Correct bending'' and ``Correct bending and re-piercing'' are displayed respectively for the operator to confirm.

After the bending process settings for the workpiece W have been made in this manner, the operator confirms the settings on the display screen and operates the operation panel 19 or the footplate device 21 to perform the actual bending process. When the bending work at each bending point is completed, the back gauge 25 automatically performs gauging according to the command from the NO6 position.
The longitudinal and vertical positions of the abutting member 41 are automatically set, and the upper limit position of the lower apron 5 is also automatically set, and the bending operations are sequentially performed according to the bending steps thus set.

This invention is not limited to the above-mentioned embodiments, but of course various modifications can be made within the scope of the technical idea described in the claims.

[Effect of the invention 1 As described above, according to the process setting method of the bending machine of the present invention, there is a possibility that interference between the lower goo and the workpiece may occur during bending at a specific bending point. By setting the round bending process at the necessary bending points, it is possible to prevent interference, and even complex shapes can be smoothly bent.

Furthermore, in the bending machine process setting device of the present invention, when interference occurs at a specific bending point by inputting the workpiece shape and the normal bending process, the NC device automatically adjusts the settings. It is possible to automatically check for interference and automatically set a gentle bending process at the necessary bending points to prevent interference, making it easier for operators to set the bending process by paying close attention to interference checks. You will be freed from the trouble of inputting data, and your burden will be significantly reduced.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a folding rock used in an embodiment of the present invention, Fig. 2 is a perspective view of a back gauge device used in the folding bar, and Fig. 3 is a perspective view of an embodiment of the present invention. Flowchart for explanation; FIG. 4 is a sectional view showing the workpiece shape obtained in the above embodiment; FIG. 5 is an explanatory diagram of the workpiece shape input data table necessary to obtain the above workpiece shape;
The figure is an explanatory diagram of a process input data table necessary to obtain the above-mentioned workpiece shape, Fig. 7 is a display example showing the bending process order to obtain the above-mentioned workpiece shape, and Fig. 8 is an illustration of the process setting device of the present invention. A block diagram of one embodiment, FIG. 9 is a flowchart explaining the operation of the above embodiment, and FIG.
)~(d> is an explanatory diagram showing the interference pattern of the workpiece in J3 in the above embodiment, Fig. 11 is an explanatory diagram of the shape input data table in the above embodiment, and Fig. 12 is a process input in the above embodiment. An explanatory diagram of a data table, FIG. 13(a). FIG. 13(b) is an explanatory diagram of a data table without showing an example of setting the soft bending process in the above embodiment, and FIG. 14 is an explanatory diagram showing a conventional workpiece bending process. Figure 15<a) is +e of the workpiece.
Figure 15(b) is an explanatory diagram showing the workpiece bending process to prevent interference, and Figures 16(a) to <C> are explanatory diagrams explaining the bending process. It is. 1... Bending machine 3... Upper 81S apron 5... Lower apron 7... Punch 9... Die 25... Back gauge 41... Abutment member W... Work 201. ...Workpiece shape input means 203...Bending process order input means 205...Interference checking means 207...Middling bending process setting means 209...Each axis command value calculation means 211...Display means

Claims (2)

[Claims] (1) In the developed shape of the workpiece, sequentially number each bending point from one edge side, enter the bending length and bending angle for each bending point to input the workpiece shape, and then input the workpiece shape. Input the abutment point and bending point sequentially in the order of the bending process using the bending number, and at a specific bending point that requires round bending, enter the round bending identification symbol and the shallow bending point for round bending. A process setting method for a bending machine, characterized in that a bending angle is inputted. (2) simulating the bending process of the workpiece based on the bending process setting means and the input of the bending process setting means;
Interference checking means for checking interference between the workpiece and the upper and lower dies, and when this interference checking means discovers that interference occurs during bending at a specific bending point, for avoiding interference at that specific bending point. Process setting for a bending machine, comprising a bending setting means for finding a bending point that requires a bending point and automatically setting a bending identification symbol and a bending angle for the bending process input at that bending point. Device.