JP4153097B2 - Angle finding method and apparatus in bending machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an angle setting method and an angle setting device in a bending machine such as a press brake.
[0002]
[Prior art]
Generally, a bending machine such as a press brake equipped with an NC device is provided with a drive mechanism for a table drive shaft on each of the left and right sides, and the NC device is based on a D value (depth value) corresponding to a target angle. Each drive mechanism is controlled to bend the workpiece to near the target angle.
[0003]
Here, the D value is the distance between the punch and the die corresponding to the target angle (ie, the distance between the blades), in other words, the amount of pressurization stroke of the table corresponding to the target angle. Depending on the type of NC device, the operator directly inputs and sets the D value, and the operator only has to input the target angle, and the NC device calculates the corresponding D value based on the target angle. There is a type of which is obtained and set according to.
[0004]
In either type, the finished angle is within the allowable range by operating the hand pulser (manual operation pulse generator) as needed to drive the workpiece after bending (increment bending). It is done to fit.
[0005]
In such a bending machine, conventionally, an appropriate angle measuring device is attached to the machine body so that the bending angle can be measured without removing the bent work from the machine body, and the angle measurement value is appropriately set. The display can be displayed on the display, and the operator can drive in with the hand pulser while viewing the display.
[0006]
[Problems to be solved by the invention]
However, such conventional devices have the advantage that the operator can visually confirm the bending angle of the workpiece during the operation of the hand pulser, but on the other hand, while watching the bending portion of the workpiece and performing the follow-up operation, Reading the angle display is actually quite cumbersome, so even if the angle is displayed, the operator cannot use it effectively, and eventually the optimal timing to end the driving is determined. There was a problem that it was difficult to improve the accuracy of the workpiece finishing angle.
[0007]
In addition, since the conventional angle measuring device controls the bending angle measurement and display using the control unit of the NC device, it needs to be incorporated as a part of the NC device. When applied to a bending machine equipped with an existing NC device, there has been a problem that the NC device must be greatly modified or the NC device must be replaced.
[0008]
The present invention solves the above-mentioned problems of the conventional apparatus and informs the operator of the bending angle of the workpiece in bending by means of a sound, thereby making it possible to improve the accuracy of the finished angle of the workpiece. It is an object to provide a method and apparatus.
[0009]
In addition, the present invention is intended to improve the accuracy of the workpiece finishing angle by notifying the operator of the bending angle of the workpiece in bending by means of sound, and to be easily applied to a bending machine equipped with an existing NC device. An object of the present invention is to provide an angle setting device in a bending machine capable of performing the above.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention includes a step of pressurizing a workpiece to a vicinity of a target angle by a bending machine, a step of measuring a bending angle of the workpiece being pressed, and a step of displaying an angle measurement value for use by an operator And when the display angle reaches a value corresponding to the target angle, a step of generating a bending end sound for notifying the operator of this.
[0011]
In this way, the bending angle of the workpiece being pressed is displayed for use by the operator, and when the display angle reaches a value corresponding to the target angle, a bending end sound is generated to notify the operator of the bending angle. Will be able to carry out appropriate driving operations with peace of mind.
[0012]
The present invention also includes a step of pressurizing a workpiece to a vicinity of a target angle by a bending machine, a step of measuring a bending angle of the workpiece at the end of bending, and a sound generation step for notifying an operator with sound based on the measurement result. The sound generation process generates a bending end sound when the workpiece bending angle measurement value corresponds to the target angle, and generates a warning sound when the workpiece bending angle measurement value exceeds the target angle. When there is an angle error that occurs and the measured value of the bending angle of the workpiece does not reach the target angle, a driving sound is generated during the driving operation based on the angle error.
[0013]
In this way, by notifying the operator of the bending angle of the workpiece in the bending machine by sound, the operator can perform an appropriate driving operation with peace of mind.
[0014]
The present invention also includes a step of determining whether or not there is an angle error when the bending angle of the workpiece being pressed does not reach the target angle at the end of the bending process, and when there is an angle error, based on the angle error A driving process for transferring the necessary number of pulses to cause the NC device to execute the driving operation to drive the workpiece to the target angle, and a process for generating a driving operation sound for informing the operator during the driving operation; Consists of.
[0015]
In this way, by transferring the number of pulses necessary to execute the driving operation to the NC device, the workpiece can be automatically driven to the target angle, and during the execution of the driving operation, this is indicated to the operator. By generating a driving sound that informs the operator, the operator can perform an appropriate driving operation with peace of mind.
[0016]
Further, the present invention provides a driving control means, a step of setting a target angle in the driving control means, a step of setting a D value corresponding to a provisional bending angle smaller than the target angle in the NC device, and a work by the NC device. Based on the angle error between the angle measurement value and the target angle, the drive control means automatically drives into the NC unit based on the process of pressurizing and bending to near the temporary bending angle, the process of measuring the bending angle of the workpiece at the end of the temporary bending The process includes a driving process for transferring the number of pulses necessary to execute the operation to drive the workpiece to the target angle, and a process for generating a driving operation sound for informing the operator during the driving operation.
[0017]
Thus, based on the angle error between the bending angle of the workpiece and the target angle at the end of provisional bending, the driving control means can cause the NC device to execute the automatic driving operation, and while the automatic driving operation is being executed, By generating a driving sound that informs the operator of this fact, the operator can perform appropriate driving work with peace of mind.
[0018]
The present invention also includes a step of providing a follow-up measuring means, setting a target angle in the follow-up measuring means, a step of setting a D value corresponding to a temporary bending angle that is sweeter than the target angle in the NC device, and a work by the NC device. During the process of pressurizing and bending to the vicinity of the temporary bending angle, and during the manual driving operation by the operation of the pulse generator following the temporary bending, the driving measurement means measures the bending angle of the workpiece and provides the angle measurement value to the operator A display step and a step of generating a follow-up end sound that informs the operator when the angle measurement value reaches an angle corresponding to the target angle.
[0019]
As described above, during the manual driving operation following the temporary bending, the driving measurement means displays the measured bending angle of the workpiece for use by the operator, and when the angle measurement value becomes an angle corresponding to the target angle, the driving measurement means However, by generating a driving end sound informing the operator of this, the operator can perform an appropriate driving operation with peace of mind.
[0020]
Further, according to the present invention, an angle measuring means for measuring the bending angle of the workpiece being pressed, a display means for displaying an angle measurement value by the angle measuring means for use by an operator, and a display angle of the display means correspond to a target angle. And a sound generating means for generating a bending end sound for notifying the operator when the angle is reached.
[0021]
Thus, the display means displays the measured bending angle value of the workpiece for the operator, and when the displayed angle reaches an angle corresponding to the target angle, a bending end sound is generated and notified to the operator. It will be possible to carry out appropriate driving operations with peace of mind.
[0022]
In addition, the present invention provides an NC device that is configured so that the workpiece is bent to the vicinity of the temporary bending angle by the operating means for setting the target angle and the NC device for which the D value corresponding to the temporary bending angle that is less than the target angle is set. Control means for determining the amount of drive required to drive the workpiece to the target angle, and pulse generation for generating the number of pulses necessary for the NC device to perform automatic drive operation according to the drive amount determined by the control means And sound generating means for generating a chasing operation sound for informing the operator during the automatic chasing operation of the NC apparatus by the pulses transferred from the pulse generating means.
[0023]
In this way, after the provisional bending is completed, the NC generating device can execute the automatic driving operation by generating the necessary number of pulses according to the driving amount obtained by the control unit, and the automatic driving operation can be performed automatically. By generating a driving operation sound to notify the operator during the driving operation, the operator can perform an appropriate driving operation with peace of mind.
[0024]
Further, the present invention provides a pulse generator after a work is bent to the vicinity of a temporary bending angle by an operating means for setting a target angle and an NC device for setting a D value corresponding to a temporary bending angle that is less than the target angle. During the manual driving operation to drive the workpiece to the target angle by the operation of, when the manual driving operation is completed, the angle measuring means for measuring the bending angle of the workpiece, the means for displaying the angle measurement value by the angle measuring means to the operator, and And a sound generating means for generating a follow-up end sound for notifying the operator of this.
[0025]
In this way, during the manual driving operation following the temporary bending, the display means displays the measured bending angle value of the workpiece to the operator, and when the manual driving operation is completed, the driving end sound is generated to notify the operator. Will be able to carry out appropriate driving operations with peace of mind.
[0026]
Furthermore, the present invention provides a workpiece near a temporary bending angle by an operating means for setting a target angle, a pulse generating means for automatic driving, and an NC device for setting a D value corresponding to a temporary bending angle that is less than the target angle. And the angle measuring means for measuring the bending angle of the workpiece during the driving operation in which the NC device drives the workpiece to the target angle based on the applied pulse, and when the driving operation is completed, A sound generating means for generating a chasing end sound to be notified; and a switching means for switching a pulse generation source applied to the NC apparatus to either a pulse generator or a pulse generating means. Configure to be connectable to.
[0027]
As described above, when the driving operation for the NC device to drive the workpiece to the target angle based on the applied pulse is completed, the driver can perform the driving operation with peace of mind by generating the driving end sound to notify the operator. It becomes. In addition, since this angle-determining device is connected to the NC device via a switching means for switching between a pulse generator used when the operator manually drives and a pulse generating means used for the automatic driving operation, It can be easily connected to the NC device, and as a result, it can be easily retrofitted to a bending machine equipped with an existing NC device.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing an embodiment of a bending machine to which an angle finding device according to the present invention is attached.
[0029]
The bending machine 1 is, for example, a table raising type press brake equipped with an NC device, and an appropriate punch 5 suitable for processing is mounted on a punch holder provided on the upper table 3, while the lower table An appropriate die 9 corresponding to the punch 5 is mounted on the die holder provided in 7. And, by pressing the work held by the operator in a state of being put on the die 9 and hitting the abutting plate between the punch 5 and the die 7 as the lower table 7 is raised, It is comprised so that the pressurization area | region of a workpiece | work may be bent.
[0030]
The NC device includes an NC control box 11 attached to the processing machine main body, and an NC console 13 called an NC pendant that is attached to the processing machine main body so as to be easily operated by the operator.
[0031]
As shown in FIG. 5, the NC console 13 is input and set with various attributes and machining conditions such as workpiece material, plate thickness, target angle, punch tip R, die width and the like necessary for executing bending. An operation unit 15 having a keyboard and a display, an input / output unit 17, and an angle / D value conversion processing unit that converts the set target angle into an ascending stroke amount of the lower table 7, that is, a D value (depth value). And a control unit 19 having the functions as described above. Then, based on the calculated D value, a servo unit (not shown) is provided in the NC control box 11 so as to bend the workpiece to the vicinity of the target angle by raising the lower table 7 to the target height by hydraulic pressure or a motor. It has been.
[0032]
The NC console 13 is also provided with a hand pulser 21 that is operated by an operator as needed to drive the workpiece after bending (increment the bending). The hand pulser 21 is, for example, 0.01 mm per pulse. It is set to raise the lower table 7 in register. Further, a foot pedal 23 is connected to the NC console 13 for stepping operation when the operator starts and ends the bending process.
[0033]
The bending machine 1 is provided with a bending angle measurement system called a bending indicator (BI) 31. As shown in FIGS. 1 and 5, the bending indicator 31 includes an angle measuring device called a sensor unit 41 that measures the bending angle of the workpiece being pressed, and the bending angle of the workpiece removed from the processing machine body. Two types of angle measuring devices, an angle measuring device called a digital pro (digital protector) 71 for measuring, are provided. The bending indicator 31 also includes an operation unit 81 and a BI control unit 91. The sensor unit 41 is connected to the BI control unit 91, while the digital processor 71 is connected to the BI control unit 91 via the operation unit 81. The BI control unit 91 is connected to the NC console 13.
[0034]
As shown in FIG. 2, the sensor unit 41 moves to the left and right (X direction) along a guide rail 43 provided in parallel with the die 9 in front of the lower table 7 of the processing machine body. A movable body 45 that can be positioned at an arbitrary position, an elevator body 47 that moves up and down (Z direction) from the movable body 45, and a front and rear body (Y direction) that can be positioned at an arbitrary height. And a sensor support 49 that can be positioned at an arbitrary position, and a sensor head 51 that is supported by the sensor support 49 so as to be swingable around a support axis parallel to the die 9 (direction E). Thus, the sensor head 51 can be positioned at the optimum measurement position for measuring the bending angle of the workpiece being pressed.
[0035]
As shown in FIGS. 3 and 5, the sensor head 51 has optical sensors 55a and 55b using two phototransistors sandwiching a projector 53 using one laser diode that emits a laser beam that irradiates the workpiece. However, both optical sensors 55a and 55b are arranged so that the optical axis on which the laser beam reflected by the workpiece is incident is close to the optical axis of the projector 53. Are arranged so as to be inclined at the same angle, so that the bisector of the angle formed by both incident optical axes coincides with the optical axis of the projector 53. As the sensor head 51 swings in the E direction, the laser beam emitted from the projector 53 can follow the workpiece and take an arbitrary elevation angle from the horizontal.
[0036]
As shown in FIG. 5, the sensor support 49 is provided with a stepping motor 57 that can arbitrarily adjust the elevation angle of the sensor head 51, and a rotary encoder that detects the elevation angle of the sensor head 51 in conjunction with the stepping motor 57. 59 is provided. While the sensor head 51 is scanned within a predetermined angle range by the stepping motor 57, the light intensity of the laser beam reflected from the workpiece is measured by each of the optical sensors 55a and 55b, and the elevation angle of the sensor head 51 during the scan is measured. The BI control unit 91 calculates the bending angle of the workpiece based on the elevation angle detected by the rotary encoder 59 and when the light intensity shows a peak.
[0037]
That is, as shown in FIG. 3 and FIG. 4, the light intensity signal Pa of the optical sensor 55 a has a peak that is a bisector of the angle formed by the incident optical axis of the optical sensor 55 a and the optical axis of the projector 53. Coincides with the normal line of the workpiece, and the light intensity signal Pb of the optical sensor 55b shows a peak of the angle 2 between the incident optical axis of the optical sensor 55b and the optical axis of the projector 53. Since the bisector coincides with the normal of the workpiece, when the elevation angle of the sensor head 51 is a bisection angle between the elevation angle in the former and the elevation angle in the latter, the elevation angle of the sensor head 51, that is, the projector 53. The optical axis of this corresponds to the normal line of the workpiece.
[0038]
Therefore, the BI control unit 91 samples the light intensity signals Pa and Pb measured by the two optical sensors 55a and 55b and the elevation angle θ of the sensor head 51 detected by the rotary encoder 59 during scanning of the sensor head 51. Then, from the elevation angle θa when the light intensity signal Pa exhibits a peak value and the elevation angle θb when the light intensity signal Pb exhibits a peak value, an angle θ that bisects both elevation angles θa and θb is obtained by calculation. . Since the obtained angle θ coincides with the optical axis of the projector 53, it can be seen that the calculated angle θ is equal to the bending angle θ for one side of the workpiece, and the BI control unit 91 can be added by doubling the obtained angle. The bending angle 2θ of the workpiece under pressure is calculated.
[0039]
Further, the sensor unit 41 is provided with a mode changeover switch 61 that can select either the automatic follow-up mode or the manual follow-up mode. It is configured to be able to switch from a non-selected state to either selected state.
[0040]
As described above, since the mode changeover switch 61 is provided in the sensor unit 41 arranged in front of the bending machine 1, the operator can perform the operation within the bending work area and once the work is started. The automatic / manual switching can be selected as desired. In other words, even if you start the work with neither selected, you can select either the automatic driving mode or manual driving mode during the work, and you have selected the automatic driving mode before starting the work. Even after starting work in the state, you can switch to manual follow-up mode during work and select it, and even after starting work with manual follow-up mode selected before starting work, This can be selected by switching to the automatic tracking mode.
[0041]
On the other hand, the DigiPro 71 includes a reference surface 73 for angle measurement and a measurement surface 75 that can freely change the angle formed by the reference surface 73, and a position where the angle of the workpiece removed from the processing machine body is to be measured. The reference surface 73 and the measurement surface 75 coincide with the bending angle of the workpiece by causing the reference surface 73 to be in close contact with one side and the measurement surface 75 to follow the other side so that the measurement surface 75 is in close contact with the other side. The angle formed by The angle formed by the measurement surface 75 with respect to the reference surface 73 is measured by a magnetic measuring instrument called a magnescale as the amount of angular movement from the origin, and the measured value is displayed on the display 77 as an angle. .
[0042]
The operation unit 81 includes a keyboard 83 and a display 85. On the keyboard 83, in addition to the origin key used when setting the origin of the sensor unit 41 and the digital processor 71, the numeric keypad and setting key for inputting the target angle, the spring back, etc. to the sensor unit 41, the automatic operation of the sensor unit 41 Various necessary keys are provided such as an automatic key for selecting the driving mode, a manual key for selecting the manual driving mode, and the like. Further, the display unit 85 is provided with a process display unit 87 for displaying a process number or a mode type, and a data display unit 89 for displaying an input set value by an operator such as a target angle and a springback.
[0043]
Then, the angle measurement value of the sensor unit 41 is displayed on the data display unit 89 together with the display on the process display unit 87, and the angle measurement value of the digital processor 71 is displayed on the process display unit 87 with the display indicating that. Are displayed on the data display unit 89.
[0044]
The BI control unit 91 is provided with a control unit 93 having a function as an arithmetic processing unit for calculating the bending angle of the workpiece being pressed by the sensor unit 41 and an input / output unit 95. Also has a function as an arithmetic processing unit that calculates an angle error between the measured bending angle and the target angle by the sensor unit 41 and converts the angle error into a corresponding D value (depth value). The BI control unit 91 also includes a pulse generator 96 used in the automatic driving mode, and a switch 97 for using the pulse generator 96 in place of the hand pulser 21 of the NC console 13 in the automatic driving mode. The BI control unit 91 is connected to the NC console 13 via the switch 97, and therefore, the bending indicator 31 is connected to the NC device.
[0045]
That is, in order to connect the BI control unit 91 to the NC console 13, the connection connected to the input / output unit 17 of the NC console 13 is disconnected from the hand pulser 21, and it is connected to the side opposite to the pulse generator 96 of the switch 97. In addition, the common terminal of the switch 97 is connected to the connector of the input / output unit 17 to which the hand pulser 21 is connected. It is only necessary to make a connection for transmitting a BI start signal from the NC console 13 to the BI control unit 91 and a connection for transmitting a stop signal from the BI control unit 91 to the NC console 13.
[0046]
As described above, the operation for connecting the BI control unit 91 to the NC console 13 is very simple, and it is not necessary to substantially modify the NC console 13, so that it can be easily retrofitted to the existing NC console 13. Can do. As a result, the bending indicator 31 can be easily retrofitted to a bending machine equipped with an existing NC device.
[0047]
The bending indicator 31, in particular, the sensor unit 41, the operation unit 81, and the BI control unit 91 serve as a driving control system in the automatic driving mode, and also functions as a driving measurement system in the manual driving mode.
[0048]
In addition, the BI control unit 91 is provided with a buzzer 99 for notifying the operator of the bending angle of the workpiece during sounding operation by sound, and this buzzer 99 is provided at the end of bending by the NC device. When the measured value corresponds to the target angle, a bending end sound is generated to inform the operator of this, and when the measured value of the workpiece bending angle exceeds the target angle, a warning sound is sent to warn the operator of that. When there is an angle error that occurs and the measured value of the bending angle of the workpiece does not reach the target angle, a driving operation sound that informs the operator during the driving operation that is executed by the driving stroke amount corresponding to the angle error And the operator is informed when the end of the stroke reaches the end of the stroke. Is made as to generate an end sound narrowing have.
[0049]
Here, the origin setting of the sensor unit 41 will be described. The sensor unit 41 has the origin when the optical axis of the projector 53 is horizontal. For this reason, a magnet seal is attached to a predetermined position on the surface facing the front of the die 9 mounted on the die holder, and the origin key of the operation unit 81 is pressed to scan the sensor head 51 against the magnet seal forming the vertical surface. This is done by pressing for a certain time. Then, the bisector (that is, horizontal) of the peak values of the two light sensors 55a and 55b at that time is registered as the origin.
[0050]
Further, the origin of the digital processor 71 is determined by continuously pressing the home key of the operation unit 81 for a predetermined time in a state where the reference surface 73 and the measurement surface 75 of the digital processor 71 are brought into close contact with a right angle measuring tool such as a skewer. Then, the magnetic measurement value (that is, right angle) at that time is registered as the origin.
[0051]
Next, the effect | action of said embodiment is demonstrated using the flowchart shown in FIGS.
[0052]
First, a punch 5 having a predetermined tip R is mounted on a punch holder of the bending machine 1 on the basis of attributes such as a workpiece material, a plate thickness, and a target angle, and a die 9 having a predetermined die width is attached to a die holder. Attach to. Then, a required bending angle is input to the NC console 13 and the operation unit 81.
[0053]
That is, assuming that the target angle S is 90 °, for example, as shown in FIG. 6, the operator first inputs the target angle S (S = 90 °) into the operation unit 81 and inputs to the NC console 13. A temporary bending angle P (P = 92 °) that is slightly (2 to 3 °) less than the target angle S is input by key input (step S1). In response to this, the control unit 19 of the NC console 13 converts the temporary bending angle P into a D value corresponding thereto.
[0054]
Next, the operator presses the NC start button of the NC console 13, sets the work at a predetermined position of the processing machine body, and then steps on the foot pedal 23 (step S2).
[0055]
When the NC start button is pressed, the NC is set to the automatic operation mode, the NC starts automatic operation, and executes bending according to the programmed process (step S3).
[0056]
When the lower table 7 is raised and reaches the rising end of provisional bending (step S4), the NC automatically stops operation (step S5).
[0057]
At this time, the bending angle of the workpiece is within a range of an arbitrary error (for example, ± 2 °) from the set temporary bending angle P (P = 92 °). Further, when the automatic stop is performed, the NC remains in the automatic operation mode and is in an interlocked state in which the D value cannot be corrected.
[0058]
When the NC stops operation, the NC console 13 sends a BI start signal to the BI control unit 91 (step S6). In response to this, the bending indicator 31 is turned on.
[0059]
First, the sensor unit 41 measures the bending angle of the workpiece, and displays the angle measurement value Pδ (near the temporary bending angle P including an error) on the display 85 of the operation unit 81 via the BI control unit 91. (Step S7).
[0060]
Here, it is determined whether or not the measured bending angle Pδ corresponds to the target angle S (matches or falls within the allowable range) (step S8). (Step S9), and in the case of insufficient bending, it is determined whether the automatic driving mode is set or the manual driving mode is set (step S10).
[0061]
When the measured bending angle Pδ corresponds to the target angle S (Pδ = S), the buzzer 99 of the BI control unit 91 generates an appropriate bending end sound to notify the operator of this (step S11). Thereby, the operator can know by ear that the bending angle of the workpiece corresponds to the target angle S.
[0062]
Therefore, the operator releases the foot that was stepping on the foot pedal 23 (step S12).
[0063]
Then, the NC console 13 stops sending a BI start signal to the BI control unit 91 (step S13). In response to this, the bending indicator 31 is turned off. This completes the bending.
[0064]
The bending angle of the workpiece in the final pressure state when this bending is finished is an angle S corresponding to (matching or within an allowable range) the target angle S. ^* (S ^* = 90 °) and the angle value S ^* (S ^* = 90 °) is stored in the control unit 93 of the BI control unit 91.
[0065]
When the measured bending angle Pδ is excessively bent (Pδ <S), as shown in FIG. 7, the buzzer 99 of the BI control unit 91 generates an appropriate warning sound to warn the operator (step). S21). As a result, the operator can surely know by ear that the bending angle of the workpiece exceeds the target angle S and is excessively bent.
[0066]
The operator who has heard the warning sound releases the foot that has stepped on the foot pedal 23 (step S22).
[0067]
Then, the NC console 13 stops sending a BI start signal to the BI control unit 91 (step S23). In response to this, the bending indicator 31 is turned off.
[0068]
Therefore, the workpiece is replaced with a new one, and the provisional bending angle P is reset (step S24). That is, for example, a new temporary bending angle is set to Q (Q = 93 to 94 °). Thereafter, returning to {circle around (2)} in FIG. 6, the operations after step S <b> 2 are performed.
[0069]
When the measured bending angle Pδ is insufficient bending (Pδ> S), if the automatic driving mode is set, the BI control unit 91 first sends a stop signal to the NC console 13 as shown in FIG. (Step S31). In response, the NC is released from the set automatic operation mode, the D value correction interlock is released, and the D value can be corrected.
[0070]
Next, the BI control unit 91 calculates an angle error δ (δ = Pδ−S) between the measured bending angle Pδ and the target angle S, and converts the angle error δ into a corresponding D value (step S32). .
[0071]
Then, the BI control unit 91 switches the switch 97 to the pulse generator 96 side (step S33), and generates a number of pulses corresponding to the D value from the pulse generator 96 (step S34).
[0072]
As a result, the bending indicator 31 causes the NC to execute an automatic driving operation (step S35), and during that time, the buzzer 99 of the BI control unit 91 generates an appropriate driving operation sound to inform the operator of this (step S36). . As a result, the operator can know by ear that the automatic driving operation is being performed.
[0073]
During this automatic driving operation, the sensor unit 41 measures the bending angle of the workpiece at an appropriate interval, and displays the measured angle value on the display unit 85 of the operation unit 81 via the BI control unit 91 (step S37). .
[0074]
When the measured bending angle becomes an angle corresponding to the target angle S (coincidence or within an allowable range) (step S38), based on the angle measurement value transmitted from the sensor unit 41, the BI control unit 91 outputs the pulse from the pulse generator 96. The generation of pulses is stopped (step S39), and the buzzer 99 generates an appropriate driving end sound that informs the operator that the angle corresponding to the target angle S has been reached (step S40). Thereby, the operator can know by ear that the bending angle of the workpiece has become an angle corresponding to the target angle S.
[0075]
Therefore, the operator releases the foot that was stepping on the foot pedal 23 (step S41).
[0076]
Then, the NC console 13 stops sending a BI start signal to the BI control unit 91 (step S42). In response to this, the bending indicator 31 is turned off. This completes the bending.
[0077]
The bending angle of the workpiece in the final pressure state when this bending is finished is an angle S corresponding to (matching or within an allowable range) the target angle S. ^* (S ^* = 90 °) and the angle value S ^* (S ^* = 90 °) is stored in the control unit 93 of the BI control unit 91.
[0078]
FIG. 9 shows the above-described steps S34 to S38 in more detail. That is, the BI control unit 91 generates a predetermined number of pulses (for example, 10 pulses) as an initial value from the pulse generator 96, whereby the bending indicator 31 causes the NC to execute an initial driving operation ( Step S51).
[0079]
During this initial pulse generation period, the buzzer 99 of the BI control unit 91 generates an appropriate driving sound for notifying the operator of this (step S52). Thus, the operator can surely know by the ear that the driving operation is being performed.
[0080]
When the generation of the initial pulse is finished, the sensor unit 41 measures the bending angle of the workpiece and displays the measured angle value on the display unit 85 of the operation unit 81 via the BI control unit 91 (step S53). The BI control unit 91 calculates a D value (D1) per pulse from the angle measurement value at that time and the initial pulse number (ie, 10 pulses) (step S54).
[0081]
Subsequently, the BI control unit 91 calculates the remaining D value (Dn) based on the obtained D value (D1) per pulse (step S55).
[0082]
Then, the BI control unit 91 generates a number of pulses (n pulses) corresponding to the D value (Dn) from the pulse generator 96, whereby the bending indicator 31 causes the NC to perform an automatic driving operation ( Step S56).
[0083]
During the n pulse generation period, the buzzer 99 of the BI control unit 91 generates an appropriate driving sound for notifying the operator of this (step S57). As a result, the operator can know by ear that the automatic driving operation is being performed.
[0084]
When the generation of n pulses is finished, the sensor unit 41 measures the bending angle of the workpiece, and displays the measured angle value on the display unit 85 of the operation unit 81 via the BI control unit 91 (step S58). The BI control unit 91 determines whether or not the angle measurement value at that time has reached the target angle S (step S59). If the target angle S has not been reached, the remaining D value (Dn) is calculated again. The process returns to step S55.
[0085]
That is, starting from the calculation of the remaining D value (Dn), a series of operations ranging from execution of automatic driving operation based on the D value (Dn), generation of driving noise during execution, measurement of workpiece bending angle, and display are performed. By repeating the operation several times, the target angle S can be accurately driven.
[0086]
On the other hand, when the measured bending angle Pδ is insufficiently bent (Pδ> S) and the manual driving mode is set, the operator is displayed on the display unit 85 of the operation unit 81 as shown in FIG. The angle measurement value Pδ is checked to confirm that the driving is necessary, and then the NC stop button is pressed (step S61). When the NC stop button is pressed, the NC is released from the set automatic operation mode, the D value correction interlock is released, and the D value can be corrected.
[0087]
Next, the operator operates the hand pulser 21 while looking at the display angle, and manually performs the follow-up operation (step S62).
[0088]
During the manual driving operation, the sensor unit 41 measures the bending angle of the workpiece, and displays the measured angle value on the display unit 85 of the operation unit 81 via the BI control unit 91 (step S63).
[0089]
When the measured bending angle is equal to (or coincides with or within an allowable range) the target angle S (step S64), the buzzer 99 of the BI control unit 91 generates an appropriate driving end sound to notify the operator (step S64). S65). Thereby, the operator can know by ear that the bending angle of the workpiece has become an angle corresponding to the target angle S.
[0090]
Therefore, the operator releases the foot that was stepping on the foot pedal 23 (step S66).
[0091]
Then, the NC console 13 stops sending a BI start signal to the BI control unit 91 (step S67). In response to this, the bending indicator 31 is turned off. This completes the bending.
[0092]
The bending angle of the workpiece in the final pressure state when this bending is finished is an angle S corresponding to (matching or within an allowable range) the target angle S. ^* (S ^* = 90 °) and the angle value S ^* (S ^* = 90 °) is stored in the control unit 93 of the BI control unit 91.
[0093]
When the necessary bending process is completed in this way, the workpiece is removed from the processing machine body, and the bending angle is measured using the digital processor 71 for confirmation. Then, the measured value is displayed on the display unit 85 of the operation unit 81 and stored in the storage unit of the control unit 93 of the BI control unit 91.
[0094]
In the above embodiment, in the manual driving mode, during the driving operation by the operator, the driving sound for notifying the operator was not generated. However, the present invention is not limited to this. In the automatic driving mode, Similarly to the above, an appropriate driving operation sound may be generated.
[0095]
In the above embodiment, the sensor head 51 includes the projector 53 using one laser diode and the optical sensors 55a and 55b using two phototransistors. While scanning within the range, the light intensity of the laser beam reflected from the workpiece is measured by each optical sensor, and the elevation angle of the sensor head 51 during the scan is detected, and based on the elevation angle when the light intensity shows a peak. Although it is configured to calculate the bending angle of the workpiece, it is not limited to this. For example, an appropriate non-contact type sensor unit can be used, and a contact type can also be used. is there.
[0096]
In the above embodiment, when a temporary bending angle is key-inputted to the NC console 13, the control unit 19 of the NC console 13 serves as an angle / D value conversion processing unit that converts the temporary bending angle into a D value corresponding thereto. Although the present invention is applied to an NC apparatus having a function, the present invention is not limited to this. For example, the present invention can also be applied to an NC apparatus having a structure in which an operator directly inputs a D value.
[0097]
In the above embodiment, the workpiece is bent to the target bending angle by the NC device and then driven to the target angle. However, the present invention is not limited to this. For example, the NC device is bent from the beginning to the target angle. You may comprise as follows.
[0098]
In the above-described embodiment, the present invention is applied to a bending machine provided with an NC device. However, the present invention is not limited to this. For example, the present invention can also be applied to a bending machine that bends with a handle.
[0099]
Furthermore, in the above embodiment, the table raising type press brake is exemplified as the bending machine, but the invention is not limited to this, and for example, it is applied to various bending machines including a table lowering type press brake. It is possible.
[0100]
【The invention's effect】
As described above, the present invention, as described above, a step of pressurizing the workpiece to the vicinity of the target angle by a bending machine, a step of measuring the bending angle of the workpiece being pressed, and a step of displaying the angle measurement value for use by the operator, When the display angle reaches a value that corresponds to the target angle, the process consists of a process that generates a bend end sound that informs the operator of this, so that the operator can carry out appropriate driving operations with peace of mind. Thus, there is an effect that the finishing accuracy of the workpiece can be improved.
[0101]
The present invention also includes a step of pressurizing a workpiece to a vicinity of a target angle by a bending machine, a step of measuring a bending angle of the workpiece at the end of bending, and a sound generation step for notifying an operator with sound based on the measurement result. The sound generation process generates a bending end sound when the workpiece bending angle measurement value corresponds to the target angle, and generates a warning sound when the workpiece bending angle measurement value exceeds the target angle. When there is an angle error that occurs when the measured bending angle of the workpiece does not reach the target angle, the configuration is such that a driving noise is generated during the driving operation based on the angle error. The operator can be informed of the bending angle by sound, so that the operator can perform appropriate driving operations with peace of mind. There is an effect that it is possible to improve the gully accuracy.
[0102]
The present invention also includes a step of determining whether or not there is an angle error when the bending angle of the workpiece being pressed does not reach the target angle at the end of the bending process, and when there is an angle error, based on the angle error Transferring the number of pulses necessary to cause the NC device to execute the driving operation to drive the workpiece to the target angle, and generating a driving operation sound for informing the operator during the driving operation. Therefore, it is possible to automatically drive the workpiece to the target angle and to generate a driving sound that informs the operator during the driving operation. It is possible to perform the driving operation with peace of mind, thereby improving the workpiece finishing accuracy.
[0103]
Further, the present invention provides a driving control means, a step of setting a target angle in the driving control means, a step of setting a D value corresponding to a provisional bending angle smaller than the target angle in the NC device, and a work by the NC device. Based on the angle error between the angle measurement value and the target angle, the drive control means automatically drives into the NC unit based on the process of pressurizing and bending to near the temporary bending angle, the process of measuring the bending angle of the workpiece at the end of the temporary bending It is composed of a driving process for transferring the number of pulses necessary to execute the operation to drive the workpiece to the target angle, and a process for generating a driving operation sound for informing the operator during the driving operation. Therefore, the drive-in control means can cause the NC device to execute the automatic drive-in operation, and the operation is performed during execution of the automatic drive-up operation. Can generate thrust operation sound to inform the, therefore, the operator can be performed with confidence the proper thrust work, whereby there is an effect that it is possible to improve the finishing precision of the workpiece.
[0104]
The present invention also includes a step of providing a follow-up measuring means, setting a target angle in the follow-up measuring means, a step of setting a D value corresponding to a temporary bending angle that is sweeter than the target angle in the NC device, and a work by the NC device. During the process of pressurizing and bending to the vicinity of the temporary bending angle, and during the manual driving operation by the operation of the pulse generator following the temporary bending, the driving measurement means measures the bending angle of the workpiece and provides the angle measurement value to the operator Since it is composed of a step of displaying and a step of generating a chasing end sound informing the operator when the angle measurement value becomes an angle corresponding to the target angle, the display is provided for use by the operator. When the measured bending angle value of the workpiece reaches an angle corresponding to the target angle, a follow-up end sound is sent to inform the operator of the fact. It can be, therefore, the operator can be performed with confidence the proper thrust work, whereby there is an effect that it is possible to improve the finishing precision of the workpiece.
[0105]
Further, according to the present invention, an angle measuring means for measuring the bending angle of the workpiece being pressed, a display means for displaying an angle measurement value by the angle measuring means for use by an operator, and a display angle of the display means correspond to a target angle. When the angle is reached, it is configured to include a sound generating means for generating a bending end sound to notify the operator of this, so that a bending end sound is generated when the display angle of the display means becomes an angle corresponding to the target angle. Thus, there is an effect that the operator can perform an appropriate driving operation with peace of mind, thereby improving the accuracy of finishing the workpiece.
[0106]
In addition, the present invention provides an NC device that is configured so that the workpiece is bent to the vicinity of the temporary bending angle by the operating means for setting the target angle and the NC device for which the D value corresponding to the temporary bending angle that is less than the target angle is set. Control means for determining the amount of drive required to drive the workpiece to the target angle, and pulse generation for generating the number of pulses necessary for the NC device to perform automatic drive operation according to the drive amount determined by the control means And a sound generating means for generating a follow-up operation sound that informs the operator during an automatic follow-up operation of the NC apparatus by a pulse transferred from the pulse generation means. It can be executed, and it can generate a driving sound that informs the operator during the automatic driving operation. For the operator can be performed with confidence the proper thrust work, whereby there is an effect that it is possible to improve the finishing precision of the workpiece.
[0107]
Further, the present invention provides a pulse generator after a work is bent to the vicinity of a temporary bending angle by an operating means for setting a target angle and an NC device for setting a D value corresponding to a temporary bending angle that is less than the target angle. During the manual driving operation to drive the workpiece to the target angle by the operation of, when the manual driving operation is completed, the angle measuring means for measuring the bending angle of the workpiece, the means for displaying the angle measurement value by the angle measuring means to the operator, and In addition, since it is configured to include a sound generation means for generating a follow-up end sound to inform the operator of the fact, during manual drive-in operation following temporary bending, the display means displays to provide the operator with the bending angle measurement value of the workpiece, It is possible to generate a chasing end sound that informs the operator when the manual chasing operation is completed. It can be performed with confidence switching of thrust operations, whereby there is an effect that it is possible to improve the finishing precision of the workpiece.
[0108]
Furthermore, the present invention provides a workpiece near a temporary bending angle by an operating means for setting a target angle, a pulse generating means for automatic driving, and an NC device for setting a D value corresponding to a temporary bending angle that is less than the target angle. And the angle measuring means for measuring the bending angle of the workpiece during the driving operation in which the NC device drives the workpiece to the target angle based on the applied pulse, and when the driving operation is completed, A sound generating means for generating a chasing end sound to be notified; and a switching means for switching a pulse generation source applied to the NC apparatus to either a pulse generator or a pulse generating means. Because it is configured to be connectable to the driver, it is possible to generate a driving end sound to notify the operator when the driving operation ends. , The operator can be performed with confidence the proper thrust work, whereby there is an effect that it is possible to improve the finishing precision of the workpiece.
[0109]
In addition, since this angle-determining device is connected to the NC device via a switching means for switching between a pulse generator used when the operator manually drives and a pulse generating means used for the automatic driving operation, It can be easily connected to an NC device, and therefore can be easily retrofitted to a bending machine equipped with an existing NC device. As a result, there is an effect that it is extremely suitable as a retrofitting type angle setting device. .
[Brief description of the drawings]
FIG. 1 is a perspective view of a bending machine to which an angle adjusting device is attached.
FIG. 2 is a perspective view of a sensor unit.
FIG. 3 is an explanatory diagram of the principle of angle measurement by a sensor head.
FIG. 4 is a graph showing the relationship between the elevation angle of the sensor head and the light intensity of the optical sensor.
FIG. 5 is a system block diagram of the angle finding device.
FIG. 6 is a flowchart showing the operation of the angle finding device.
FIG. 7 is a flowchart in the case of excessive bending.
FIG. 8 is a flowchart in the case of insufficient bending.
FIG. 9 is a detailed flowchart of a part of FIG. 8;
FIG. 10 is a flowchart in a manual driving mode.
[Explanation of symbols]
1 Bending machine (press brake)
3 Upper table
5 Punch
7 Lower table
9 die
11 NC control box
13 NC console
15 Operation unit
17 Input / output section
19 Control section
21 Hand Pulser
23 Foot pedal
31 Bending indicator (BI)
41 Sensor unit
43 Guide rail
45 Mobile
47 Lifting body
49 Sensor support
51 Sensor head
53 Floodlight
55a, 55b Optical sensor
57 Stepping motor
59 Rotary encoder
61 Mode selector switch
71 DigiPro (digital protector)
73 Reference plane
75 Measuring surface
77 Display
81 Operation unit
83 keyboard
85 Display
87 Process display
89 Data display section
91 BI control unit
93 Control section
95 I / O section
96 Pulse generator
97 switcher
99 buzzer

Claims (5)

In bending machine equipped with NC device,
Determining whether there is an angle error when the bending angle of the workpiece being pressed does not reach the target angle at the end of the bending process;
When there is an angular error, a driving process for transferring the number of pulses necessary to cause the NC device to perform a driving operation based on the angular error and driving the workpiece to the target angle;
Generating a driving sound that informs the operator of the driving operation during the driving operation,
In the driving step, first, a predetermined number of pulses (initial pulses) as initial values are transferred to the NC device to execute the initial driving operation, and when the initial pulse is generated, the bending angle of the workpiece is measured. The D value per pulse is calculated from the angle measurement value and the number of the initial pulses, and the remaining D value is calculated based on the D value per pulse, and corresponds to the obtained remaining D value. An angle forming method in a bending machine, wherein a number of pulses are transferred to an NC apparatus. In bending machine equipped with NC device,
Providing a driving control means, and setting a target angle in the driving control means;
Setting a D value corresponding to a temporary bending angle that is sweeter than the target angle in the NC device;
A process of pressurizing the workpiece by the NC device and bending it to the vicinity of the temporary bending angle;
Measuring the bending angle of the workpiece at the end of provisional bending;
Based on the angle error between the angle measurement value and the target angle, a driving step for driving the workpiece to the target angle by transferring the number of pulses required for the driving control means to cause the NC device to perform an automatic driving operation;
Generating a driving sound that informs the operator of the driving operation during the driving operation,
In the driving step, first, a predetermined number of pulses (initial pulses) as initial values are transferred to the NC device to execute the initial driving operation, and when the initial pulse is generated, the bending angle of the workpiece is measured. The D value per pulse is calculated from the angle measurement value and the number of the initial pulses, and the remaining D value is calculated based on the D value per pulse, and corresponds to the obtained remaining D value. An angle forming method in a bending machine, wherein a number of pulses are transferred to an NC apparatus. In bending machine equipped with NC device,
Determining whether there is an angle error when the bending angle of the workpiece being pressed does not reach the target angle at the end of the bending process;
When there is an angular error, a driving process for transferring the number of pulses necessary to cause the NC device to perform a driving operation based on the angular error and driving the workpiece to the target angle;
Generating a driving sound that informs the operator of the driving operation during the driving operation,
The driving-in step is
Converting the angular error into a corresponding D value;
Transferring a predetermined number of pulses as an initial value to the NC device to execute an initial driving operation;
Measuring the bending angle of the workpiece at the end of the initial driving operation;
Obtaining a D value per pulse from the angle measurement value at the end of the initial driving operation and the number of pulses of the initial value, and obtaining a remaining D value based on the D value;
Transferring the number of pulses corresponding to the obtained remaining D value to the NC device to execute the remaining driving operation for driving the workpiece to the target angle;
An angle forming method in a bending machine characterized by comprising: In bending machine equipped with NC device,
Providing a driving control means, and setting a target angle in the driving control means;
Setting a D value corresponding to a temporary bending angle that is sweeter than the target angle in the NC device;
A process of pressurizing the workpiece by the NC device and bending it to the vicinity of the temporary bending angle;
Measuring the bending angle of the workpiece at the end of provisional bending;
Based on the angle error between the angle measurement value and the target angle, a driving step for driving the workpiece to the target angle by transferring the number of pulses required for the driving control means to cause the NC device to perform an automatic driving operation;
Generating a driving sound that informs the operator of the driving operation during the driving operation,
The driving-in step is
Converting the angular error into a corresponding D value;
Transferring a predetermined number of pulses as an initial value to the NC device to execute an initial driving operation;
Measuring the bending angle of the workpiece at the end of the initial driving operation;
Obtaining a D value per pulse from the angle measurement value at the end of the initial driving operation and the number of pulses of the initial value, and obtaining a remaining D value based on the D value;
Transferring the number of pulses corresponding to the obtained remaining D value to the NC device to execute the remaining driving operation for driving the workpiece to the target angle;
An angle forming method in a bending machine characterized by comprising: In bending machine equipped with NC device,
An operation means for setting a target angle;
Control for determining the amount of driving required for the NC device to drive the workpiece to the target angle after the workpiece is bent to the vicinity of the temporary bending angle by the NC device in which the D value corresponding to the temporary bending angle that is less than the target angle is set. Means,
Pulse generating means for generating the number of pulses necessary to cause the NC device to perform automatic driving operation according to the driving amount determined by the control means;
Sound generating means for generating a follow-up operation sound that informs the operator during the automatic follow-up operation of the NC device by a pulse transferred from the pulse generating means,
The control means first generates a predetermined number of pulses (initial pulse) as an initial value from the pulse generation means, causes the NC device to execute an initial driving operation, and measures after the generation of the initial pulse is completed. The D value per pulse is calculated from the measured bending angle value of the workpiece and the number of the initial pulses, the remaining D value is calculated based on the D value per pulse, and the obtained remaining D value. An angle-determining device in a bending machine, characterized in that the number of pulses corresponding to is generated from the pulse generating means.

Images