JPH0259119A - Bending machine - Google Patents

Abstract

PURPOSE:To improve efficiency of the bending work by providing a manual pulse generator for a bending data fetching section to correct the data in the data fetching section and performing the bending work of the work based on the corrected data. CONSTITUTION:For a numeric value input section 1 where the working data is inputted, the manual correcting section 3 consisting of the manual pulse generator 15, a memory section 16 for teaching contents and correcting section 17 is provided. During operating the bending machine 5, as the manual correcting data is inputted in the correcting section 3, from the manual pulse generator 15, and teaching contents memory 16, the pulse is outputted to correct the numeric value of a working command pulse. Then, a servo amplifier 20 of a driving section 4 drives a motor 21 to control its deviation to be zero using the correcting numeric value. Since the data is corrected to perform the bending work without returning to the program correcting mode, its working efficiency is improved.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to a folding machine such as a press brake.

(Conventional technology) In bending machines such as presses and brakes, the upper mold,
One of the lower molds is moved to bend the work sandwiched between the upper mold and the lower mold.

FIG. 3 is a side view showing an example of such a folding machine.

The bending machine shown in this figure includes a frame 100 formed in a rectangular shape, a fixed body 101 fixed to the upper side of this frame 100, and an upper mold 102 fixed to the lower end of this fixed body 101. The frame 100 includes a ram 103 attached to the lower side of the frame 100 so as to be movable up and down, and a lower mold 104 fixed to the upper end of the ram 103.

Then, when the operation switch is turned on with the workpiece 105 inserted between the upper mold 102 and the lower mold 104, a hydraulic mechanism (not shown) operates and the ram 1
03 rises, and a workpiece 105 is sandwiched between the lower mold 104 attached to the upper end of this ram 103 and the upper mold 102, as shown in FIG. 4(a). In this state, as shown in FIG. 4(b), the back gauge 107 is pulled back, the lower mold 104 is further raised, and the workpiece 105 is bent.

(Problem to be Solved by the Invention) However, in such a conventional bending machine, the lower mold 104 is
The workpiece 105 is appropriately held between the lower mold 104 and the upper mold 102 by controlling the upward stroke amount of the
In this state, the workpiece 105 is bent to an angle specified by the command value data or the like.

However, the thickness of the workpiece 105 processed by such a bending machine may vary for some reason.

In such a case, it is necessary to input correction value data numerically using a numeric keypad, etc., to correct the command value data etc. input into the program, and the labor required to input numerical values significantly reduces machining efficiency. There were many things.

In particular, if the above-mentioned inconvenience occurs while the bending machine is in continuous operation, first put the bending machine into program writing mode, enter the correction value using the numeric keypad, etc. After that, you have to return to automatic mode again.

Furthermore, when returning to the automatic mode, initial settings such as origin setting must be performed again, which makes the work complicated.

Further, in such a bending machine, a lower mold 104,
When the workpiece 105 is held between the upper mold 102,
Since the pull-pack operation of the back gauge 107 is started, when the thickness of the workpiece 105 is smaller than the set thickness value, the workpiece 105 is appropriately held between the lower mold 104 and the upper mold 102. Previously, there was a problem in that the back gauge 107 pulled back and the position of the workpiece 105 shifted. Conversely, when the thickness of the workpiece 105 is larger than the set thickness value, the upper mold 1
02 and the lower mold 104, the work 105 is bent, and the end of the back gauge 107 is scraped by the end of the work 105.

In view of the above circumstances, the present invention makes it possible to correct command value data, etc. without numerically inputting correction values even if the thickness of the workpiece varies, and thereby always pulls back the back gauge at an appropriate timing. It is an object of the present invention to provide a bending machine which is capable of correcting command value data and the like at any time even during continuous operation without returning to the program writing mode.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the bending machine according to the present invention has the following features:
The data is imported into a bending machine that moves either an upper mold or a lower mold based on the input data and bends the work sandwiched between the upper mold and the lower mold. a data acquisition section; a manual pulse generator for inputting a correction value; a correction section for correcting the data acquired by the data acquisition section based on the correction value input from the manual pulse generator; a drive unit that moves either the upper mold or the lower mold to bend the work sandwiched between the upper mold and the lower mold based on the data corrected by the above. It is characterized by

(Function) In the above configuration, when the handle of 1 manual pulse generator is operated, a correction pulse is output from this manual pulse generator, and the data taken in by the data acquisition section is corrected. Based on the data, either the upper mold or the lower mold is driven to process the workpiece.

(Embodiment) FIG. 1 is a block diagram showing an embodiment of a folding machine according to the present invention.

The bending machine shown in this figure includes a numerical input section 1 that takes in numerical data, and a calculation section that calculates lower mold position data required when bending a workpiece 7 from the numerical data taken in by this numerical input section 1. 2 and the manually entered correction value (
a manual correction section 3 that corrects the calculation result of the calculation section 2 based on manual correction data); and a drive section that moves the lower mold 5 up and down in accordance with the lower mold position data corrected by the manual correction section 3. 4.

When an operation switch (not shown) is pressed, this bending machine raises the lower die 5 and bends the workpiece 7 based on input command value data and correction values. At this time, if manual correction data is input to the manual correction section 3, the lower mold position data calculated by the calculation section 2 is corrected based on this manual correction data, and the lower mold position data calculated by the calculation section 2 is corrected based on this correction result. The position of the lower mold 5 and the pull-pack timing of the back gauge (not shown) are corrected.

The numerical input section 1 includes a keyboard 9 and a program memory 1.
Command value data import unit 1 that imports command value data from 0
1, a correction value import section 12 that imports correction value data input from the keyboard 9, and a correction value import section 12 that imports the command value data taken in by the command value data import section 11, an adder/subtractor 13 that corrects the command value data by subtracting correction value data;
It is equipped with

Then, command value data and correction data are taken in from the keyboard 9 and the program memory 10, and corrected command value data is created from each of these data, and this is supplied to the calculation section 2.

In this case, the keyboard 9 inputs the flange height H1, bending angle A, plate thickness t, correction value data, etc. of the workpiece 7 to be machined, as shown in FIG. 2(a). Also, as a parameter.

Data on the mold and experimental values showing the relationship between the bending angle and the like are input.

The calculation unit 2 calculates the lower mold position data D necessary for bending the workpiece 7, as shown in FIG. 2(b), based on the corrected command value data output from the numerical input unit 1. It is equipped with a calculation section 14, and when each command value data is supplied from the numerical input section 1, it calculates lower mold position data D based on these command value data, and also calculates lower mold position data D according to this lower mold data D. The processing command pulse is calculated and supplied to the manual correction section 3.

The manual correction section 3 includes a manual pulse generator 15 that generates pulses when a handle or the like is operated, and a current correction output from the drive section 4 when a direct teaching switch (not shown) or the like is pressed. A teaching content storage unit 16 that captures and stores value data, and a calculation unit 2 based on the correction value data pulses stored in the teaching content storage unit 16 and the number of pulses output from the manual pulse generator 15. A command value counter 17 is provided for correcting the count value of machining command pulses output from the machine.

Then, when pulses are output from the 1-manual pulse generator 15 or the teaching content storage unit 16, the count value of the machining command pulse is corrected according to the number of these pulses, and the correction result (corrected count value) is It is supplied to the drive section 4.

The drive unit 4 includes a deviation calculator 18 that extracts the difference between the count output from the manual correction unit 3 and the current position data fed back, and a deviation calculator 18 that converts the output of the deviation calculator 18 into a D/D/
A D/A converter 19 that performs A conversion, and a motor 21 according to the deviation data output from this D/A converter 19.
a servo amplifier 20 that drives the lower mold 5 to move it up and down, an encoder 22 that detects when the motor 21 rotates and generates pulses, and counts the pulses output from the encoder 22 to a current value counter 23 that calculates the current position of the lower mold 5 and feeds it back to the deviation calculation section 18, calculates correction data for teaching and supplies it to the teaching content storage section 16; It is equipped with

When the count value is supplied from the manual correction unit 3, the deviation calculation unit 18 calculates the deviation between this count value and the current lower mold position, and the servo amplifier 20 reduces this deviation to zero. Rotate the motor 21 as follows.

In this way, in this embodiment, the count value of the machining command pulses output from the calculation section 2 can be easily corrected by operating the manual pulse generator 15 provided in the manual correction section 3. Even if the thickness of the workpiece 7 varies, the position of the lower die 5 can be easily corrected by simply operating the manual pulse generator 15. The workpiece 7 can be appropriately held between the mold 6 and the mold 6.

In addition, since the position where the workpiece 7 is clamped can be optimized, the pullback timing of the back gauge calculated in accordance with this clamping position can always be optimized, which allows the workpiece 7 to be bent. The timing and the pull-pack timing of the back gauge can always be kept in the optimum state.

Furthermore, in the embodiment described above, the calculation section 2 and the drive section 4
Since the manual correction unit 3 is provided between the folding machine and the folding machine, even when the bending machine is automatically operated, the count value supplied to the drive unit 4 can be adjusted without putting the numerical input unit 1 into program writing mode. Can be easily corrected.

Further, in the embodiment described above, since the teaching content storage section 16 is provided, it is possible to easily teach the optimal clamping state while checking the clamping state of the workpiece 7.

〔Effect of the invention〕

As explained above, according to the present invention, even if the thickness of the workpiece varies, the command value data etc. can be corrected without numerically inputting the correction value, and as a result, backgauge is always performed at the appropriate timing. It can be pulled back, and even during continuous operation, command value data etc. can be corrected at any time without returning to the program writing mode.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of a bending machine according to the present invention, Fig. 2(a) is a perspective view for explaining the embodiment, and Fig. 2(b) is an illustration for explaining the embodiment. Figure 3 is a side view showing an example of a conventional folding machine, Figure 4 is a side view showing an example of a conventional folding machine.
Figures (a) and (b) are side views each showing an example of the operation of the folding machine shown in Figure 3. 1...Data import section (numeric input section) 4...Drive section 5...Lower mold 6--Upper mold 7...Workpiece 15...Manual pulse generator 17--Correction Section (command value counter) Fig. 3

Claims (1)

[Claims] (1) In a folding machine that moves either an upper mold or a lower mold based on input data and bends a work sandwiched between the upper mold and the lower mold. , a data import unit that imports the data; a manual pulse generator for inputting a correction value; and a data import unit that corrects the data imported by the data import unit based on the correction value input from the manual pulse generator. a correction unit that moves either the upper mold or the lower mold based on the data corrected by the correction unit;
A bending machine comprising: a drive unit that bends a workpiece sandwiched between the lower die and the lower mold.