JPS649892B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for bending a plate using a bending machine such as a press brake or a tangential bender, and more specifically, the present invention relates to a method for bending a plate using a bending machine such as a press brake or a tangential bender. This invention relates to a bending method using.

BACKGROUND ART Conventionally, press brakes, tangential benders, and the like have been used as bending machines for bending a plate material into a box shape, for example. When bending a plate material using a bending machine, each time the width (bending length) of the plate material changes, it is necessary to change the length of the mold corresponding to the width.

As mentioned above, split molds are used in which the mold is divided into multiple parts so that the length of the mold can easily be adjusted as the width of the plate material changes, and the conversion of the mold is automatically performed. To do this, an automatic mold changer (ATC) is used.

However, in recent years, due to the diversification of box-shaped products, product dimensions have changed in various ways (for example, even if the external dimensions of a box-shaped product are the same, the internal width dimensions differ due to changes in the plate thickness, and this internal width (It is necessary to change the length of the mold in response to changes in dimensions.) Therefore, there is a problem in that split molds of various sizes must be prepared. Further, even if split molds of various sizes are prepared, sometimes it is not possible to correspond to the product size.

This invention was invented in view of the above-mentioned problems, and embodiments thereof will be described in detail below with reference to the drawings.

The bending method according to the present invention is carried out by a bending machine 29, such as a tangential bender or a press brake, schematically shown in FIGS. 4-6.

More specifically, as shown in FIGS. 5 and 8, a plurality of split molds 13A to 13A are stored in a mold storage section (rack) 45 provided close to the bending machine 29. 13E, 15A, 15B, automatic mold changing device (ATC device) 43 (see Fig. 7)
When the bending machine 29 is automatically attached to the mold mounting position (see Fig. 8) to bend the plate material 11 (Figs. 2 and 3), the bending machine 29 A plurality of split molds 13A to 13 attached to
_The mold ₁₃ , 1
The bending process of the plate material 11 is performed by adjusting the entire length of the plate material 5 and maintaining the above-mentioned distances d ₁ and d ₂ .

By the way, for example, as shown in Fig. 2 A and B,
When bending the plate material 11 into a box shape using the bending machine 29, if the A side is bent and then the B side is bent, the bent shape of the A side has a radius r from the end surface of the mold 13. bend it.

By the way, as shown in FIG. 3A, if the length of the long side B of the box shape is, for example, _L1 , then the length of the mold 13 is _L1 with respect to the length of the B side _L1 . −2(r
+t). Similarly, when the length of the B side is changed to _L2 , the length of the mold 15 is _L2-2 (r+t), as shown in FIG. 3B. In this case, mold 1
3 is composed of, for example, one split mold 13A and two split molds 13B, 13C, 13D, and 13E. Further, the mold 15 includes, for example, one divided mold 13A, two molds 13B, 13C, and 13E each.
and 15A, 15B. In other words, due to the large change from length L ₁ to length L ₂ , the split fitting 13D indicated by diagonal lines in Figure A has changed from Figure B.
Replace with split metal fittings 15A and 15B indicated by diagonal lines,
Other split fittings 13A, 13B, 13C, 13
E does not need to be replaced. In addition, the interval _〓d1 between each split mold is changed to the interval _〓d2 . During this time 〓d ₁ ,
d ₂ is selected to be zero or greater than zero, and equal to or less than the appropriate plate thickness, respectively. In other words, between
If d ₁ and d ₂ are relatively large, it will affect the bending accuracy, so it is desirable that they be equal to or less than the plate thickness. In this way, the molds 13 and 15 can be easily and quickly set to the desired length by appropriately exchanging the necessary split molds or changing the distance _d1 .

The above-mentioned change in the overall length of the molds 13 and 15 is as follows:
ATC for the mold mounting position of the bending machine 29.
The device 43 splits the molds 13A to 13E, 15.
This is done when replacing A and 15B.
It goes without saying that the length of the entire mold can be changed simply by adjusting the distance between the divided molds without attaching or detaching the divided molds.

The ATC device 43 that automatically exchanges molds is
As shown in FIGS. 4 and 5, it is arranged behind the bending machine 29 (on the left side in FIG. 5). This ATC device 43 is configured to hold the split mold and move in the X, Y, and Z axis directions, and in this embodiment, it is configured as shown in FIG. There is.

That is, as shown in FIG.
The frame body 57 of No. 3 is formed into a gate shape. The Y-axis carriages 61 and 63 are controlled by the Y-axis control servo motor 59.
moves equidistantly to the center distribution. The Z-axis control motor 6 provided on the Y-axis carriages 61 and 63
5, the Z-axis carriage 67 moves in the vertical direction. In addition, the X axis provided in the Z-axis carriage 67
The axis control motor 69 is guided by a guide on the Z-axis carriage 67, and moves the X-axis carriage 71 in the arrow directions K and L in Figure A. X-axis carriage 71
An attachment/detachment device 73 is provided at the tip of the mold 13,
15, and from the mold attachment position of the bending machine 29 shown in FIG.
can be exchanged for.

If the configuration of the control system for controlling the ATC device 43 etc. is schematically shown in terms of functional blocks, the first
The configuration is as shown in the figure. That is, based on the divided mold information 3 stored in the computer 1 and input data, mold selection information 5 and mold arrangement information 7 are created. In addition, bending information 9 is stored in the computer 1, and based on these mold arrangement information 7 and bending information 9, the automatic mold changing device (ATC device) and the bending machine are numerically controlled, respectively, to change the mold. is placed and the bending work is performed.

By the way, the above-mentioned split mold information 3 is information that stores the type, length, rack position, etc. of the split mold stored in the rack 45 of the ATC device.
Further, the input data includes all the contents necessary for processing, such as the length of the product, the plate thickness, and the number of products, which are input to the computer 1. The mold selection information 5 is information for selecting a split mold based on the input data and the split mold information 3 so that a predetermined bending can be performed. Further, the mold placement information 7 is information for arranging the divided molds selected by the mold selection information 5. Furthermore, the bending information 9 is information on the amount of correction to be stored in the computer 1 so that an appropriate bending angle can be obtained by taking into account the amount of spring back due to the thickness of the product plate and the like.

With the above configuration, the ATC device 43 is operated as follows. That is, as shown in FIG. 8, by designating the input data of the split molds 13A to 13E, 15A, 15B, etc. stored in the upper and lower positions of the rack 45, the split mold information 3 of the computer 1 is used to select the split molds. After obtaining the mold selection information 5 and the mold arrangement information 7, the X-axis carriage 71 moves to the designated split mold position, the attaching/detaching device 73 enters, attaches the split mold, and removes the mold from the bending machine 29. Enter the mold installation position, remove the split mold, and install it. Furthermore, a series of operations are carried out to select the next designated split mold from the rack 45 and install it in the bending machine 29, so that the mold 13 or 15 of a predetermined length can be bent in a predetermined manner. is obtained. Note that the space between the split molds attached to the bending machine 29 is
The function of moving the location to d ₁ and d ₂ is also performed.

Figures 4 to 6 show the bending machine 29, ATC
FIG. 4 is an explanatory diagram showing, for reference, the arrangement of devices for carrying in and out of plate materials with respect to the device 43 and the bending machine 29; In Figs. 4 to 6, the plate material is sent by a conveyor or the like in the direction of arrow F in Fig. 4A.
It is placed on rollers 19 on supports 17. Thereafter, the support 17 is rotated clockwise by the air ring 21 and positioned above the support 17 in FIG. 4A. After this positioning, support 17
returns to its original position. The clamper 25 of the frame 23 shown in FIG. 6 is moved in the direction of the arrow G by a drive means such as a chain (not shown), and after gripping and fixing the end of the plate material with the clamper 25, the clamper 25 of the frame body 23 shown in FIG. The digital table 37 shown in FIG.
Place it in the center of the After this, the clamper 25 moves upward and further moves in the direction of arrow F. The plate placed on the digital table 37 is centered by the rotation of the DC motor 27 so that it is located at the center of the bending machine 29. After this centering, the plate material is fixed by an abutting section 33 and a retraction clamp 35 driven by a DC motor 31, and is moved to a bending machine 29, where it is bent. After the end face of the plate material is bent, the plate material is returned onto the digital table 37, rotated by 90 degrees to 180 degrees by the rotary table 39, and sequentially
After bending the four sides of the board, the finished product is placed on the digital table 37. After this, the extrusion cylinder 41 of the frame body 23 protrudes downward, moves in the direction of arrow F with the next plate material fixed by the clamper 25, and simultaneously carries out the finished product and positions the plate material on the digital table 37. conduct. In the figure, 43 is an ATC device, and 45 is a rack of the ATC device 43. 47 is an NC console board for the bending machine 29 and digital table 37;
9 is an NC console panel for the ATC device, 51 is a power panel for the bending machine 29 and the digital table 37, 53 is a power panel for the ATC device, and 55 is a hydraulic unit.

As can be understood from the above description of the embodiments, the gist of the present invention is as described in the claims. , a suitable number of places between the plurality of split molds attached to the bending machine are held at a distance equal to or less than the thickness of the plate material to be bent. In other words, when it is difficult to arrange multiple split molds closely together, by keeping an appropriate number of parts between the split molds at the above distance, it is possible to prevent changes in bending length due to changes in plate thickness, etc. It is something that can be handled. Therefore, according to the present invention, even if the length of the side on which the plate material is bent varies, it can be handled steplessly by keeping the interval between the split molds equal to or less than the thickness of the plate material. Moreover, since the above-mentioned interval is small, there will be no problem caused by the interval formed between the split molds.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a functional block diagram showing the control system functionally, and FIG. 2 is a box-shaped bending state diagram of a plate, where A is a perspective view and B is a diagram. Figure 3 shows the arrangement of the mold, A shows the A-side bent state, B shows the B-side bent state, and Fig. 4 shows the schematic arrangement of the bending machine and ATC device. , A is a plan view thereof, B is a partial front view thereof, FIG. 5 is a side view taken in the direction of arrow B in FIG. 4, FIG. 6 is a sectional view taken along the line A-A in FIG.
A schematic configuration diagram of the ATC device is shown, A is its side view,
B is a front view thereof, and FIG. 8 is a schematic explanatory diagram of the operation of the ATC device. 13, 15...Mold, 13A to 13E, 15
A, 15B...Divided mold, 29...Bending machine, 43...ATC device, 45...Rack (mold storage section).

Claims (1)

[Claims] 1 When the plurality of split molds stored in the mold storage section are automatically attached to the mold mounting position of the bending machine by the automatic mold changer to perform the bending process of the plate material, the A bending machine characterized in that the bending process is carried out by holding an appropriate number of parts between a plurality of split molds attached to the machine for a period equal to or less than the thickness of the plate material to be bent. Bending processing method.