JPH0788558A - Control method of plate bending machine - Google Patents

Abstract

PURPOSE:To obtain the exchangeability of working program among various machines. CONSTITUTION:This control method is applicable to the plate bending machine provided with a die part 1 to bend a plate clamped with upper/lower dies 25, 26 through vertical motion of a bending die and a plate feed device 3 to feed between upper/lower dies with clamping the plate W. In the control device 44 of plate bending machine, a discrete data for each machine is set in a memory means 48. The instruction of a working program 47 is described by an instruction 60 common to different machine correctable by discrete data for each machine. The instruction 60 is corrected at execution corresponding to the machine through the set data in the memory means 48 and is executed. For instance, the projecting instruction 60b of an end locater 11 does not include the data at which position to project, instead a plate width data 60a is used. At executing, the end locater 11 of position corresponding to the machine from the plate width data 60d is selected and projected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a plate bending machine for bending a plate.

[0002]

2. Description of the Related Art In a plate bending machine called a multi-bender, a plate clamp positioned on a table is clamped at the center by a main clamp, and the clamp is fed into a mold to bend the end. Is configured. The main clamp has an indexing rotation function, and it can be rotated by 90 degrees or 180 degrees for each processing of one side of the plate material,
Bending of 4 sides is performed.

This type of plate bending machine is controlled by an NC device, but has the following problems. That is, in the case of a turret punch press or a right angle shear, even if the machines have different sizes, the same machining program can be used with almost no correction as long as the plate material has a size that can be machined by the machines. However, in the case of multi-vendor, the same program could not be used. The following items a to e are listed as main factors that cannot be commonly used.

A) See FIG. All multi-vendors have three sets of end locators 11 inside, inside, and outside, and according to the size of the plate material W to be carried in, which set of end locators 11a to 11c is to be divided by the M code by the automatic programming device. It is outputting. However, since the positions of the end locators 11a to 11c are different depending on the model, the locations are different even if the raising command of the end locators 11c of the same group is issued.
For example, in the case of a command to raise the middle end locator 11b, a work W of the size shown in the figure is appropriate for the model shown in FIG. 9A, but two end locators are provided for the model shown in FIG. The distance between 11b and 11b becomes larger than the plate width,
Cannot be positioned. b) See FIG. The plate material carry-in position in the machining program is calculated on the basis of the end locator, but the distance between the end locator 11 and the reference position X0 of the mold is different for each model. That is, there is a displacement amount Xe of the end locator position between the models. Therefore, in the machining program created for each machine, the X coordinate when gripping the center of the plate material W by the main clamp 5 is different. The plate material position when the plate material W is unloaded after the processing is also different for the same reason as when the material is loaded.

C) See FIG. When changing the die width of the upper die 25, the B-axis (ram) rises to a die width changing position close to the stroke upper limit, but the position differs depending on the machine. For example, B = 180 in the machine shown in FIG. 7A, but B = 220 mm in the machine shown in FIG. In this way, the B-axis rising position created for each machine is different. d) See FIGS. The coordinates of the A-axis (vertical axis of the bending die 27) are good in the case of upward bending but not in the downward bending (FIG. 16) because the dimension between the upper and lower cutting edges 27a and 27b of the bending die 27 differs from machine to machine. It depends on the machine. That is, A
The shaft has its origin set at a height at which the lower cutting edge 27b of the curved die 25 matches the tip O of the lower die 26, and the upper cutting edge 27a.
When bending down using, it is necessary to set the coordinate value by subtracting the distance between the upper and lower blade edges. In the machine of FIG. 15 (A), the upper edge 27a becomes the origin height when A = -120, and in the machine of FIG. 15 (B), the origin height becomes the origin height.

E) See FIG. When processing is not possible with the main clamp 5 alone, the sub clamp 7 is used as a replacement as shown in FIG. 7B, but the range that can be processed only with the main clamp 5 Distance until they interfere) is different. Therefore, depending on the model, machining is performed with the main clamp 5 held, and the sub-clamp 7 is used on other models, which results in different machining programs. Due to these factors, the compatibility of machining programs between models cannot be obtained.

An object of the present invention is to provide a method for controlling a plate bending machine, which enables compatibility of machining programs between models.

[0008]

A method of controlling a plate bending machine according to the present invention will be described with reference to FIG. 1 corresponding to an embodiment. This plate material folding machine is controlled by a mold part (1) for end-bending the plate material (W) sandwiched by the upper and lower molds (25, 26) by raising and lowering the bending mold (27) and gripping the plate material (W). And the upper and lower type (2
It is applied to a plate material folding machine provided with a plate material feeding device (3) for feeding between the sheet material 5, 26). In this plate bending machine,
Model-specific data is set in the storage means (48),
The machining program (47) uses a different model common command (60) that can be executed by correcting the plate material bending machines of different models with the model-specific data. Note that the correction here means not only data correction within one instruction, but also processing such as addition of a new instruction and ignoring other instructions.

[0009]

According to this method, the machining program (47) uses a common command (60) for different types of plate bending machines, and the common command (60) is specified by machine-specific data set for each machine. Since it is corrected, it can be executed as an instruction suitable for the model. Therefore, the compatibility of the machining program (47) between the models can be obtained.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. First, the configuration of the plate bending machine will be described.
As shown in FIG. 2, this plate material bending machine is composed of a mold part 1 and a plate material feeding device 3. The mold unit 1 is attached to a ram 24 and is driven by a ram lifting cylinder 42.
And a lower die 26 fixed to the main body frame 28, and a bending die 27 that bends the ends of the plate material W sandwiched by the upper and lower dies 25, 26 upward or downward.

The bending die 27 is attached to the tip of a rocker arm 29, and the rocker arm 29 is vertically swung by the three hydraulic cylinders 30 to 32 and is moved back and forth for adjusting clearances for the upper and lower dies 25 and 26. Is possible. The three hydraulic cylinders 30 to 32 form a curved drive device 40. The upper die 25 can be changed in die width by a die width changing mechanism 35.

The plate material feeding device 3 is provided with a table 2 on which the plate material W is placed, and a carriage 4 which holds the plate material W on the table 2 with a main clamp 5 and moves it back and forth (X axis direction). The carriage 4 is installed on the bed 13 via rails, and is fed back and forth by a feed screw 14 and a servomotor 15 for driving the feed screw 14. The main clamp 5 includes a pair of pads 5 that sandwich the plate material W from above and below.
a and 5b, and an index motor 19 that rotationally drives the lower pad 5b, the plate material W is rotated at a predetermined angle (for example, 90
Rotate for each index). The upper pad 5a is attached to an elevating holder 18 which can be moved up and down along a vertical rail 17 provided at the tip of the carriage 4, and is lifted and lowered by an elevating device 16 such as a cylinder device.

FIG. 3 is a plan view of the plate material feeding device 3. The table 2 has a carriage passage 10 that allows the carriage 4 to pass therethrough in the center, and is composed of a large number of strip-shaped plates 2a. A centering pin 8 for determining the width of the plate material W projects in a gap 9 between the strip-shaped plates 2a of the table 2 so as to project and retract, and a front and rear edge of the table 2 projects by a cylinder device (not shown). Front and rear positioning end locator 11
Is provided. A total of six end locators 11 are arranged in a line, and three pairs of inner, middle, and outer 11a to 11 are provided for each pair.
It is divided into c.

On both sides of the carriage 6, a pair of sub-carriage 6 is installed via a rail 21 so as to be movable back and forth in the X-axis direction, and a sub-clamping device 7 for replacing the plate material is provided at the front end of the sub-carriage 6. ing. Subcarriage 6
Is driven back and forth by a feed screw 22 (FIG. 2) installed on the carriage 4 and a servomotor 23. Note that the feed axis of the sub-carriage 6 will be described as the Y axis.

FIG. 4 shows a die width changing device 35 of the upper die 25. The upper mold 25 is composed of a large number of blade-shaped split molds 25a and a pair of end molds 25b at both ends.
A is rotatably attached to the horizontal shaft 37 in a downward posture and a flip-up posture. Divided type 25a with downward posture
Is a posture in which the plate material is clamped at the time of bending, and a width obtained by combining the arrangement width L of the split dies 25a in the downward posture with the pair of end dies 25b and the open die 25c attached thereto is equal to the upper die 2
The mold width is 5. The opening die 25c is rotatably hung in an oblique direction and becomes horizontal as the plate material is pressed.

The attitude of the split mold 25b is changed by turning the turning support member 39 that is driven to turn, and the turning support member 39 is driven along the rail 38 by a die width changing drive source such as a servomotor (see FIG. It is driven back and forth by a feed screw (not shown) and a feed screw (not shown). The pair of end molds 25b are also movable back and forth along rails (not shown) provided in parallel with the horizontal shaft 37, and are driven back and forth as the mold width is changed.

FIG. 1 is a conceptual diagram of a control system. Controller 4
4 is a CNC device (computer type numerical control device),
PMC device (programmable machine controller)
Composed of and. The CNC device executes the machining program 47 by the arithmetic control unit 45 and outputs an axis feed command to each axis servo driver 4. The PMC device is means for performing on / off control of the machine based on the sequence command of the machining program 47. Operation control unit 4 shown in FIG.
In FIG. 5, the operation control units of the CNC device and the PMC device are shown together in one block.

The calculation control section 45 is provided with a model-corresponding correction means 46 constituted by a predetermined program, and a model-specific data storage means 48 is constituted in a part of the memory device of the control device 44. The model-corresponding correction unit 46 includes an end-locator selection unit 4 that performs a process corresponding to each model.
9, a clamp coordinate correcting means 50, an upper die rising position correcting means 51, a curved die position correcting means 52, and a sub clamp feed generating means 53 are provided. These means 49-5
The function of 3 will be described later together with the processing operation.

In the model-specific data storage means 48, various data such as an end locator selection standard, an end locator X coordinate, an upper die rising position, a downward bending offset amount, and a sub clamp use standard are registered as shown in the figure. . The machining program 47 is a common command 60 for different models that can be executed by correcting the plate material bending machines of different models with the model-specific data.
It is described in.

The operation of the above configuration will be described. First, the general operation of general processing will be described. Worktable 2 in Figure 3
The plate material W carried in above is positioned in the front-rear direction and the left-right direction, and then the center portion is clamped by the main clamp 5 of the carriage 4 and is fed into the mold section 1 by the forward movement of the carriage 4. The plate material W sent into the upper die 25 and the lower die 26 of FIG.
The upper and lower molds 25, 26 are sandwiched between the upper and lower molds, and the protruding portions of the upper and lower molds 25, 26 are bent upward or downward by the vertical swing of the bending mold 27. When the end bending of one side of the plate material W is completed in this way, the upper mold 25 is opened upward, the carriage 4 is retracted, and the plate material W is rotated by 90 ° or 180 °,
The plate material W is fed again into the die unit 1. By repeating such an operation, the edge of the plate material W on four or two sides is bent. The sub clamp 7 has a small plate size
If it cannot be sent to the mold part 1, or if the main clamp 5
It is used when it is necessary to change the gripping position.

The above operation is performed by executing the machining program 47. At this time, the different model common instructions 60 of the machining program 47 are corrected and executed as follows. FIG. 5 illustrates a selective projecting operation of the end locator 11 when the plate material is loaded. The machining program 47 includes width data 60a (FIG. 1) indicating the lateral width Wz of the plate material W and an end locator protrusion command 60 that does not include end locator selection data.
b is described. This end locator protrusion command 60
When executing b, the end locator selection means 49 compares the end locator selection standard set in the model specific data storage means 48 with the plate width data 60a, and selects the end locators 11a to 11c according to the model. , Project.
For example, even if the board width Wz is the same, the two end locators 11b in the model of FIG.
In the model shown in FIG. 5B, two of the end locators 11a are included.
Is projected.

FIG. 6 shows the clamp operation when the plate material is carried in.
In response to this operation, the machining program 47 describes the dimension c from the end locator 11 to the work center in the main clamp gripping command 60a. At the time of execution of this command 60a, the clamp coordinate correction means 60a starts from the origin position (the tip position of the lower mold 26) XO according to the end locator X coordinate (for example, a or b) set in the model-specific data storage means 48. Calculate the distance X to the main clamp 5,
The main clamp 5 is moved to that position and held.

For example, in the example of FIG. 6 (A), the end locator position is a, so the position is clamped at the position X = a + c, and in the example of FIG. 6 (B), the end locator position is b, so X = Clamp at the position of b + c. It should be noted that a command for moving the main clamp 5 in order to carry out the plate material W at a predetermined position after finishing the processing is also corrected as in the case of carrying in.

FIG. 7 shows the upper die raising operation when the die width is changed. When changing the die width of the upper die 25, use the B-axis (ram 24
(Elevating axis of) is raised to the mold width change position near the upper stroke limit. In response to this operation, the machining program 47 describes an upper die up command 60d that does not include the B-axis coordinate. At the time of execution of this command 60d, the upper mold ascending position correction means 51 sets B set in the model-specific data storage means 48.
The upper die 25 is raised to the axis coordinates. For example, FIG. 7 (A)
In the model No., B = 180 is set, and the upper mold 25 is raised to that position. B = 2 in the model shown in FIG.
The upper mold 25 is raised to that position.

The upper die lift position correcting means 51 also has a function of ignoring the raising command when it is not necessary to change the die width in response to the die width changing command. This eliminates unnecessary operations. That is, the height of the B-axis when changing the die width is always set as a set with the die width change command.
7 are described. For example, it is described as "U500 B". The command "U500" is a command for making the mold width 500 mm, and the command "B" is a command for increasing the mold width to the set value. In this program, if U starts from a value other than 500, it is necessary to raise the B-axis, but in the case of continuous machining with this program, the mold width is already 500 mm and it is not necessary to change the mold width. Is. Therefore, raising the B axis to the set value (for example, 220 mm) every time is a wasteful operation. To deal with this, in this embodiment, even if there is a die width change up command 60d, the die width change up command 60d is ignored when the die width command value matches the current die width. There is. As a result, unnecessary rising time is omitted and cycle time is shortened.

8 and 9 show the offset during downward bending. As shown in FIG. 8 (C), A axis (curved lifting axis)
The origin of is set to a height such that the lower cutting edge 27b of the bending die 27 matches the tip O of the lower die 26. Therefore, as shown in FIGS.
When bending down using, the upper and lower cutting edges 27a, 27b
It is necessary to move the bending die 27 up and down with different values depending on the dimension between them.

On the other hand, in this embodiment, the bending command 60e in the machining program 47 includes a bending standby amount Aa (see FIG. 8) based on the upper cutting edge 27a of the bending die 27.
(A)) and the bending amount Ab (FIG. 8B) are described, and the offset amount at the time of downward bending (the distance between the upper and lower cutting edges 27a and 27b) is set in the model-specific data storage means 48. When the bending command 60e is executed, the bending position correcting means 52 corrects the bending standby amount Aa and the bending amount Ab by the offset amount. In the illustrated example of FIG. 9, the bending standby amount is commanded as A = + 7, the bending amount is commanded as A = -5.5, and the offset amount is 1
It is set to 20. However, at the time of execution, due to the offset correction, the bending standby amount becomes A = -113, and the bending amount becomes A = -113.
= -125.5, respectively. Since the correction is performed as described above, even if the distance between the cutting edges of the bending die 27 differs depending on the model, the common machining program 47 can be used for operation.

10 and 11 show the use of the sub-clamp 7. The axis feed command 60f at the time of bending in the machining program 47 is all data assuming that the main clamp 5 can drive. The operation limit value Xmin of the main clamp 5 in the used model is set in the model-specific data storage means 48 as the sub-clamp use reference data. At the time of executing this axis feed command 60f, the sub clamp feed generation means 53 compares the operation limit value Xmin with the feed command value, and when the main clamp 5 cannot feed,
A command for changing the holding to the sub clamp 7 and feeding the sub clamp is automatically generated.

For example, as shown in FIG. 10A, the axis feed command is X = 350 and the operation limit value X is 500 mm.
Then, the Y-axis offset value Yoft = 500−350 =
150, the required feed amount by the sub clamp 7 is 15
It will be 0 mm. Then, re-grabbing is performed at the position of X = 500 (step S1 in FIG. 11B, FIG. 11), and if the Y-axis coordinate at this time is 250, the sub-clamp is performed until the Y-axis coordinate becomes 100. The feeding by 7 is performed (step S2). That is, the sub clamp 7 feeds 150 mm. In this way, it is possible to automatically generate the feed command by the sub clamp 7 and execute the feed command 60f common to different models.

According to this method of controlling the plate bending machine, the different model common command can be corrected to the command corresponding to the model at the time of execution, and the compatibility of the machining program 47 between the models can be obtained.

In the above embodiment, each data set in the model-specific data storage means 48 may be described in the program forming the model-corresponding correction means 46.

[0032]

According to the method for controlling a plate material folding machine of the present invention, the machine type specific data is set in the storage means, and the machining program stores the machine type specific data for different types of plate material folding machines. Since the different model common instructions that can be corrected and executed are used, the compatibility of the machining programs between the models can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing a conceptual configuration of a plate bending machine and a control device to which a control method according to an embodiment of the present invention is applied.

FIG. 2 is a cutaway side view of the plate material folding machine.

FIG. 3 is a plan view of the plate material folding machine.

FIG. 4 is an enlarged front view of the mold width changing device.

FIG. 5 is an explanatory diagram of an end locator selection operation.

FIG. 6 is an explanatory diagram of coordinates when clamped by a main clamp.

FIG. 7 is an explanatory diagram of an upper mold rising position when a mold width is changed.

FIG. 8 is an explanatory diagram of a downward bending operation and an A-axis origin.

FIG. 9 is an explanatory diagram of offset correction calculation during downward bending.

FIG. 10 is an explanatory diagram of automatic Y-axis command generation when a sub clamp is used.

FIG. 11 is an explanatory diagram of a holding operation of changing to a sub clamp.

FIG. 12 is an explanatory diagram of a conventional end locator selection operation.

FIG. 13 is an explanatory diagram of a conventional clamp operation at the time of loading.

FIG. 14 is an explanatory diagram of an upper mold raising operation when a conventional mold width is changed.

FIG. 15 is an explanatory diagram of an example of a conventional curved shape.

FIG. 16 is an explanatory diagram of a conventional offset due to a curved dimension.

FIG. 17 is an explanatory diagram of a gripped state by a conventional main clamp and sub clamp.

[Explanation of symbols]

1 ... Mold part, 2 ... Table, 3 ... Plate material feeding device, 4 ... Carriage, 5 ... Main clamp, 6 ... Sub-carriage,
7 ... Sub clamp, 11, 11a to 11c ... End locator, 24 ... Ram, 25 ... Upper mold, 26 ... Lower mold, 27 ... Bending mold, 35 ... Mold width changing mechanism, 40 ... Bending mold driving device, 44 ...
Control device, 46 ... Model-specific correction means, 47 ... Machining program, 48 ... Model-specific data storage means, W ... Plate material

Claims (1)

[Claims] 1. A plate material folding machine including a die part for end-bending a plate material sandwiched by upper and lower dies by raising and lowering the bending die, and a plate material feeding device for gripping the plate material and feeding the plate material between the upper and lower dies. In this method, the peculiar data of the plate bending machine is set in the storage means, and the machining program includes different peculiar data which can be executed by correcting the peculiar data of the plate bending machine of different models. A method for controlling a plate bending machine using a model common command.