JP4492984B2 - Panel vendor - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
According to the present invention, the deviation amount of the central portion of the bend beam when the sheet metal working machine, particularly the crowning mechanism is operated, is measured and stored in advance, and the deviation amount is reflected in the command values of the A-axis and the D-axis of the bend beam. The present invention relates to a sheet metal processing machine that makes it easy to adjust the bending of a workpiece.
[0002]
[Prior art]
Conventionally, a sheet metal processing machine, for example, a panel bender, has a configuration shown in FIG. 6, for example, and drives a Z axis 24 to clamp a work W by a top die 31 and a bottom die 32.
[0003]
In this state, the D-axis 21 and the A-axis 20 are driven, and the workpiece W is bent by moving the bend beam 33 including the normal bending die 33A and the reverse bending die 33B in the vertical direction and the front-rear direction. To do.
[0004]
However, when the workpiece W is bent with the bend beam 33 as described above, the bend beam 33 and the bottom die 32 are deformed as shown in FIG.
[0005]
As a result, the bent workpiece W (FIG. 7) has the sweetest angle ∠b at the center, and if the relationship between the left and right angles ∠a and 関係 c is shown, ∠b ≧ ∠a, ∠b ≧ ∠ c.
[0006]
Therefore, a crowning mechanism comprising an AL shaft 22 and (FIG. 6) an AR shaft 23 is provided in the bend beam 33, both ends of the bend beam 33 are pulled backward (FIG. 8), and the deformation direction due to the bending reaction force of the workpiece W is determined. (FIG. 7) By deforming in the reverse direction, the variation of the angles ∠a, ∠b and ∠c of the workpiece W was reduced, and the way of bending was adjusted.
[0007]
[Problems to be solved by the invention]
[0008]
However, when the crowning mechanism is provided, both ends of the bend beam 33 are pulled and deformed as shown in FIG. 8, and when the relative distance from the bottom die 32 is made constant, the central portion of the bend beam 33 is in the Y-axis direction. Is shifted by a slight amount ΔY.
[0009]
Accordingly, the angle ∠b (FIG. 7) at the center of the workpiece W is further sweetened, and the variations in the angles ∠a, ∠b, and ∠c of the workpiece W are further increased.
[0010]
Therefore, conventionally, the D-axis 21 and the A-axis 20 of the bend beam 33 (FIG. 6) are driven many times to reduce variations in the angles ∠a, ∠b, and ∠c of the bent workpiece W. .
[0011]
BACKGROUND OF THE INVENTION
The present invention measures and stores in advance the amount of deviation of the center of the bend beam during operation of the panel bender , especially the crowning mechanism, and reflects this amount of deviation in the command values of the A-axis and D-axis that are the drive axes of the bend beam. It is related with the panel vendor which made it easy to adjust the bending way of a workpiece | work.
[0012]
It is an object of the present invention to measure and store in advance a deviation amount of a bend beam central portion when a crowning mechanism is operated in a panel vendor , and to easily adjust the bending of a workpiece in consideration of only the deviation amount. At the same time, the machining efficiency of the workpiece is improved by shortening the adjustment time.
[0013]
[Means for Solving the Problems]
In order to solve the above problems, according to the present invention, as shown in FIGS. 1 to 5, (A) a workpiece W is clamped by a top die 31 and a bottom die 32 and bent by a bend beam 33, In a panel bender having a crowning mechanism that pulls both ends of the bend beam 33 toward the rear of the machine and reduces the variation in the left and right angles with the center of the workpiece W.
(B) a database 4 storing the deviation amount ΔY of the central portion of the bend beam 33 measured in advance by operating the crowning mechanism for each of the pull amounts ΔAL and ΔAR by the AL axis 22 and the AR axis 23 of the crowning mechanism ;
The edge position of the bend beam 33 when bending the workpiece W is calculated, and the calculated deviation of the deviation amount ΔY of the central portion of the bend beam 33 stored in the database 4 is added to the calculated edge position of the bend beam 33. Computing means 3 for adding an amount ΔY;
A panel bender having bend beam drive axis control means 7 and 8 for calculating a command value of the bend beam 33 drive axis based on the cutting edge position of the bend beam 33 to which the corresponding deviation amount ΔY is added. Technical measures were taken.
[0014]
According to the configuration of the present invention, the deviation amount ΔY at the center of the bend beam 33 is measured in advance (FIG. 2B) (step 101 in FIG. 3), and the measured deviation amount ΔY is stored in the database 4. (FIG. 1) Since it is stored (step 102 in FIG. 3), the deviation amount ΔY of the central portion of the bend beam 33 stored in the database 4 is calculated in advance (step 103 in FIG. 3). (Step 104 in FIG. 3), the command values for the A-axis 20 and the D-axis 21 can be calculated based on that (step 105 in FIG. 3), and the bend beam 33 is driven by the command values (in FIG. 3). Step 106) The workpiece W can be bent (Step 107 in FIG. 3).
[0015]
Thereby, the variation in the angle of the bent workpiece W is reduced, and the deviation amount ΔY of the central portion of the bend beam 33 is reflected in the command values of the A axis 20 and the D axis 21 of the bend beam 33. Adjustment according to the bending of W can be easily performed, and the adjustment time can be shortened, and the machining efficiency of the workpiece can be improved.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described with reference to the accompanying drawings by embodiments.
FIG. 1 is an overall view of an embodiment of the present invention.
[0017]
The sheet metal processing machine shown in FIG. 1 is, for example, a panel bender, and as described above, the D axis 21 and the A axis 20 are driven with the Z axis 24 driven and the workpiece W clamped by the top die 31 and the bottom die 32. The workpiece W is driven and bent by the bend beam 33.
[0018]
Further, the bend beam 33 is provided with a crowning mechanism comprising an AL shaft 22 and an AR shaft 23. When the workpiece W is bent, both ends of the bend beam 33 are pulled backward (FIG. 2A). ), The bottom die 32 is deformed to a middle-high state.
[0019]
That is, as shown in FIG. 4A, when viewed from the side of the front table 40 described later, the AL shaft 22 (eccentric shaft) rotated by the servo motor 9C is on the left side of the bend beam 33, and the servo motor 10C is on the right side. AR shafts 23 (eccentric shafts) that rotate at the respective positions are provided, thereby constituting a crowning mechanism.
[0020]
When viewed from above, as shown in FIG. 5A, the bend beam 33 is placed in the front-rear direction at the rear of the AL shaft 22 and the AR shaft 23 provided on the back surfaces on both sides of the bend beam 33 during bending. A axis 20 to be moved to is provided.
[0021]
When the workpiece W is bent (FIG. 5B), if the crowning mechanism is not operated, the central portion of the workpiece W is bent (FIG. 4C), as described above. The angle ∠b at the center becomes sweet (FIG. 7).
[0022]
For this reason, at the time of bending the workpiece W (FIG. 5C), the crowning mechanism is operated to rotate the AL shaft 22 and the AR shaft 23, thereby pulling both ends of the bend beam 33 toward the rear of the machine, and the angle ∠a , ∠b, ∠c (FIG. 7) variation is reduced.
[0023]
However, during the operation of the crowning mechanism, as shown in FIG. 2A, a deviation amount ΔY is generated at the center of the bend beam 33.
[0024]
Therefore, according to the present invention, the deviation amount ΔY is stored in the database 4 described later (FIG. 2B), and the deviation amount ΔY is reflected in the command values of the A-axis 20 and the D-axis 21 of the bend beam 33. (Steps 103 to 105 in FIG. 3), the bend beam 33 is driven (Step 106 in FIG. 3) to bend the workpiece W (Step 107 in FIG. 3), and the bending of the workpiece W is adjusted. The adjustment time was shortened while making it easier to do.
[0025]
On the other hand, a manipulator 47 is installed in front of the panel vendor 30 (FIG. 1). A nut 43 of the manipulator 47 is screwed to a Y axis 44, and the Y axis 44 is rotated by a servo motor 45.
[0026]
The manipulator 47 has an upper turret 35 and a lower turret 36, and a C-axis 41 of the lower turret 36 is rotated by a servo motor 42.
[0027]
With this configuration, the manipulator 47 grips the workpiece W carried into the front table 40 with the upper turret 35 and the lower turret 36, and conveys and positions the workpiece W toward the panel vendor 30 side.
[0028]
On the panel vendor 30 side, the workpiece W conveyed and positioned by the manipulator 47 is clamped by the top die 31 and the bottom die 32, and the deviation amount ΔY of the central portion of the bend beam 33 stored in the database 4 is determined as the cutting edge of the bend beam 33. In addition to the position, the command values for the D-axis 21 and the A-axis 20 are calculated to bend the workpiece W.
[0029]
The sheet metal processing machine shown in FIG. 1 having such a configuration includes a CPU 1, an input unit 2, a calculation unit 3, a database 4, an output unit 5, and a sequencer 6. Control means 7 and the like are connected.
[0030]
The CPU 1 decodes and judges a program (for example, corresponding to FIG. 3) for carrying out the present invention, and controls the whole by giving instructions to each device such as the computing means 3 and the database 4.
[0031]
The input means 2 inputs the deviation amount ΔY of the central portion of the bend beam 33 that is actually measured in advance by operating the crowning mechanism, and the deviation amount ΔY is stored in the database 4. .
[0032]
The calculation means 3 performs various calculations such as calculating the cutting edge position of the bend beam 33 when the workpiece W is bent (step 103 in FIG. 3).
[0033]
The database 4 stores the deviation amount ΔY of the central portion of the bend beam 33 measured by the operator.
[0034]
In this case, as shown in FIG. 2 (B), for example, the contents of the database 4 include the AL axis 22 of the crowning mechanism and (FIG. 2 (A)) the pull amount ΔAL by the AR axis 23 and the central portion of the bend beam 33 for each ΔAR. Deviation amount ΔY is stored, and parameter numbers 3001, 3002,.
[0035]
The output means 5 is, for example, a display, and displays a storage result in the database 4 and the like.
[0036]
The sequencer 6 temporarily stores the data sent from the computing means 3 etc., and transmits the data to the A-axis control means 7 etc. by adjusting the control timing.
[0037]
When the blade tip position of the bend beam 33 to which the deviation amount ΔY of the bend beam 33 is added is transmitted via the sequencer 6, the A-axis control means 7 converts it into a command value and calculates it. (Step 105 in FIG. 3), the bend beam 33 is moved in the front-rear direction by controlling the A axis 20 (step 106 in FIG. 3).
[0038]
The A axis control means 7 includes a positioning unit 7A, a servo amplifier 7B, a servo motor 7C, and an encoder 7D.
[0039]
Among these, the positioning unit 7A calculates a command value as a target value based on the cutting edge position of the bend beam 33 to which the deviation amount ΔY of the bend beam 33 is added (step 105 in FIG. 3), and servo The amplifier 7B amplifies the command value, and the servo motor 7C rotates by the amplified command value to operate the A-axis 20.
[0040]
The encoder 7D feeds back the command value to the positioning unit 7A, whereby the difference between the target value and the current value is detected as an error signal, and the bend beam 33 is positioned accurately.
[0041]
In addition, the D-axis control means 8, the AL-axis control means 9, the AR-axis control means 10, the Z-axis control means 11 and the like have the same configuration and functions as the A-axis control means 7, and each drive the D-axis 21. Control to move the bend beam 33 up and down, drive and control the AL shaft 22 to pull the left end of the bend beam 33 to the rear of the machine, and drive and control the AR shaft 23 to pull the right end of the bend beam 33 to the rear of the machine The clamp beam 37 is moved up and down by driving and controlling the Z axis 24.
[0042]
The sequencer 6 (FIG. 1) is also connected with control means for the Y-axis 44 and the C-axis 41, and the manipulator 47 performs a predetermined operation by these control means.
[0043]
The operation of the present invention having the above configuration will be described below.
[0044]
(1) Operation until the deviation amount ΔY at the center of the bend beam 33 is stored in the database 4.
[0045]
First, in step 101 of FIG. 3, the deviation amount ΔY of the central portion of the bend beam 33 by the crowning mechanism is measured, and in step 102 it is stored in the database 4.
[0046]
That is, based on the size and angle of the workpiece W to be bent (FIG. 1), the pulling amounts ΔAL and ΔAR by the AL shaft 22 and the AR shaft 23 constituting the crowning mechanism (FIG. 2A) are input to the input means 2 (FIG. 2A). When input from FIG. 1), the pull amounts ΔAL and ΔAR are transmitted to the AL axis control means 9 and the AR axis control means 10 via the sequencer 6.
[0047]
As a result, the AL axis 22 and the AR axis 23 are driven and controlled, and both ends of the bend beam 33 are pulled toward the rear of the machine by the pull amounts ΔAL and ΔAR (FIG. 2A), and at the same time the center of the bend beam 33 is shifted. .
[0048]
At this time, the operator actually measures the deviation amount ΔY of the central portion of the bend beam 33, stores the deviation amount ΔY in the database 4 via the input means 2 (FIG. 1), and assigns the parameter numbers 3001, 3002,. ··· is attached (FIG. 2 (B)).
[0049]
(2) Operations until the command values for the A-axis 20 and the D-axis 21 of the bend beam 33 are calculated.
[0050]
Next, in step 103 of FIG. 3, the cutting edge position of the bend beam 33 is calculated. In step 104, the deviation amount ΔY of the central portion of the bend beam 33 stored in the database 4 is added to the cutting edge position of the bend beam 33. The command values for the A axis 20 and the D axis 21 of the bend beam 33 are calculated.
[0051]
That is, the blade edge position of the bend beam 33 when the workpiece W is bent (FIG. 1) is known in advance from the size of the workpiece W, the height of the flange, and the like.
[0052]
Accordingly, the calculation means 3 calculates the edge position of the forward bending die 33A or the reverse bending die 33B of the bend beam 33 when the workpiece W is bent.
[0053]
In the calculation means 3, the deviation amount ΔY of the central portion of the bend beam 33 of the corresponding parameter numbers 3001, 3002,... Stored in the database 4 is added to the calculated blade edge position of the bend beam 33.
[0054]
The cutting edge position to which the deviation amount ΔY of the central portion of the bend beam 33 is added is transmitted from the calculation means 3 (FIG. 1) to the A-axis control means 7 and the D-axis control means 8 via the sequencer 6 and is positioned in the positioning unit 7A. 8A, the command value is calculated.
[0055]
(3) Bending operation.
[0056]
In step 106 of FIG. 3, the manipulator 47, the clamp beam 37, the bend beam 33, and the like are driven, and in step 107, bending is performed.
[0057]
That is, when the command values of the A-axis 20 and the D-axis 21 of the bend beam 33 are calculated in step 105 of FIG. 3, the CPU 1 (FIG. 1) transmits a bending command to each device.
[0058]
As a result, the Y-axis 44 and the C-axis 41 (FIG. 1) of the manipulator 47 are driven, and the workpiece W carried on the front table 40 is gripped by the upper turret 35 and the lower turret 36 and conveyed to the panel vendor 30 side.・ It is positioned.
[0059]
In this state, the Z-axis 24 of the panel vendor 30 is driven, and the work W is clamped by the top die 31 and the bottom die 32.
[0060]
The command values for the A-axis 20 and D-axis 21 calculated in the positioning units 7A and 8A of the A-axis control means 7 and D-axis control means 8 are amplified by the servo amplifiers 7B and 8B, and the amplified commands The servo motors 7C and 8C rotate according to the value, so that the A axis 20 and the D axis 21 are driven.
[0061]
Therefore, the bend beam 33 moves in the front-rear direction and the up-down direction, and for example, the workpiece W is forward-bent by the forward-bending die 33A.
[0062]
In this case, since the deviation amount ΔY of the central portion of the bend beam 33 measured in advance is added to the cutting edge position of the bend beam 33, the command values of the A axis 20 and the D axis 21 calculated based on the deviation amount ΔY are included in the calculated values. This deviation amount ΔY is reflected.
[0063]
Therefore, the variation in the angle of the bent workpiece W is reduced, the adjustment of the workpiece W according to the bending can be easily performed, and the adjustment time can be shortened to improve the machining efficiency of the workpiece. Is possible.
[0064]
【The invention's effect】
As described above, according to the present invention, the panel vendor operates the crowning mechanism actually measured in advance the amount of deviation of the bend beam central stores a shift amount of the bend beam central portion which is the actual measurement in the database, the Since the stored deviation amount is reflected in the command values for the A-axis and D-axis, which are the bend beam drive axes, the variation in the angle of the bent workpiece is reduced, and the deviation amount at the center of the bend beam is reduced. Therefore, adjustment as the workpiece is bent can be easily performed, the adjustment time can be shortened, and the machining efficiency of the workpiece can be improved.
[0065]
[Brief description of the drawings]
FIG. 1 is an overall view showing an embodiment of the present invention.
FIG. 2 is a configuration diagram of a database 4 according to the present invention.
FIG. 3 is a flowchart for explaining the operation of the present invention.
FIG. 4 is a diagram illustrating a configuration of a crowning mechanism according to the present invention.
FIG. 5 is a diagram illustrating the operation of the crowning mechanism according to the present invention.
FIG. 6 is a diagram illustrating a configuration of a conventional sheet metal processing machine.
FIG. 7 is a view for explaining a deformation state of a conventional sheet metal working machine.
FIG. 8 is a diagram for explaining a problem of a conventional technique.
[Explanation of symbols]
1 CPU
2 Input means 3 Computing means 4 Database 5 Output means 6 Sequencer 7 A-axis control means 8 D-axis control means 9 AL-axis control means 10 AR-axis control means 11 Z-axis control means 20 A-axis 21 D-axis 22 AL-axis 23 AR-axis 24 Z axis 31 Top die 32 Bottom die 33 Bend beam 35 Upper turret 36 Lower turret 37 Clamp beam 40 Front table 41 C axis 44 Y axis 47 Manipulator W Workpiece

Claims (1)

In a panel bender having a crowning mechanism that clamps a workpiece with a top die and a bottom die and performs bending with a bend beam, pulls both ends of the bend beam toward the rear of the machine, and reduces variations in the center and left and right angles of the workpiece.
A database storing the deviation amount of the central portion of the bend beam measured in advance by operating the crowning mechanism for each pull amount by the AL axis and the AR axis of the crowning mechanism ;
Calculating means for calculating a bend beam cutting edge position when bending a workpiece, and adding a corresponding deviation amount of the deviation amount of the bend beam center stored in the database to the calculated bending beam cutting edge position; ,
A panel bender having a bend beam drive axis control means for calculating a command value of the bend beam drive axis based on the edge position of the bend beam to which the corresponding deviation amount is added .

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