JPH11129040A - Punch press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a cycle time reduction, a processing time reduction by a simple control in the case a form processing is accompanied. SOLUTION: A form processed position memory means 27 which memorizes a form processed position and a punch awaiting height control means 29 to keep the punch 4 awaiting at a higher position than the normal waiting height when the punch position P passes through the form processed position memorized are arranged. A division setting means 23 is arranged to divide a plate member in a grid status of a vertical, horizontal shape. A form processed position existence judging means 24 is arranged to judge if the form processed position Wa exists in an unit area (X1 , Y1 ) divided by the means 23. The formed processed position memory means 27 is made to memorize the judging result in each unit area. The punch awaiting height control means 29 is equipped with a passage interfere judging means 30 to judge if a form processed position exists in a path wherein the plate member movement is conducted by the memorized information of the above form processed position memory means 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punch press with improved control of a punch standby height position when performing a forming process.

[0002]

2. Description of the Related Art Conventionally, in punching for punching, in order to shorten a cycle time, a plate material is not set at a rising standby height of a punch die at a top dead center position. Control is performed such that the height position does not hinder the feeding. However, if molding is involved,
Since the forming heights are variously different, in all the punching processes, the punch die is raised to the top dead center and kept waiting. For this reason, the time required for the punch die to approach the plate material surface from the top dead center is wasted, and the cycle time cannot be reduced.

An object of the present invention is to provide a punch press capable of reducing the cycle time and the processing time when molding is performed by simple control.

[0004]

The structure of the present invention will be described with reference to FIG. 1 corresponding to an embodiment. This punch press is a punch press having a plate material moving means (11) for moving the plate material (W) and positioning the plate material at a predetermined position, and a processing part (12) for forming the positioned plate material (W). A forming position storing means (27) for storing a formed position of the plate material (W) being processed; and the forming process when the plate material (W) is moved by the plate material moving means (11). A punch standby height control unit (29) for holding the punch (4) at a position higher than the normal standby height when the processing unit (12) passes through the forming position stored in the position storage unit (27); It is provided with. According to this configuration, when the processing portion (12) passes through the forming position of the plate (W) when the plate (W) moves, based on the storage result of the forming position storage means (27), the punching is performed. Under the control of the standby height control means (29), the punch (4) is caused to wait at a position higher than the normal standby height. The standby height at this time may be a height slightly higher than the forming height or a top dead center. When the processing portion (12) does not pass through the forming position of the plate (W), the punch (4) is made to stand by at the normal standby height. Normal standby height is
For example, the height is set to such an extent that the movement of the plate material is not hindered when only the boring process is performed. In this way, the forming position is stored, and the punch (4) is made to wait at a higher position only when the processing part (12) passes through the forming position when moving the plate material, and can be set lower when not passing. Since the punch (4) stands by at a normal standby height, even when punching involving forming processing, there is no problem in moving the plate material.
It is possible to eliminate a useless descent time in the lifting and lowering operation of the punch (4), and to improve a cycle time of punching.

[0005] In the punch press having the above structure, a section setting means (23) for dividing the plate (W) into a vertical and horizontal grid.
To determine whether or not each of the unit areas (X _i , Y _j ) divided vertically and horizontally by this means (23) has a formed portion (Wa) of the plate material (W). Determining means (24) for storing the forming-possible processing position storage means (27);
Stores the determination result of the presence or absence of the forming process for each of the unit areas (X _i , Y _j ), and the punch standby height control means (29) controls the sheet material (W) by the sheet material moving means (11). Passing interference determining means (30) for determining whether or not a unit area (X _i , Y _j ) having a shaping portion (Wa) passes through the position (P) of the processing portion (12) when moving. The punch (4) may be made to stand by at a position higher than the forming height (H) when passing. As described above, when the plate material (W) is divided into a lattice shape and the presence or absence of the forming process is determined for each unit area (X _i , Y _j ), the processing part (12) is formed by the forming part (Wa). ) Can be easily calculated, and the control is simple.

Further, in these configurations, the forming height (H) at each position where the forming of the plate material (W) being processed is performed.
Is provided, and the punch standby height control means (29) is higher than the molding height (H) stored in the molding height storage means (31). The punch (4) may be put on standby at a slightly higher position. As a result, it is possible to control the standby height to an optimum level according to each molding process, further reduce waste time due to the standby height being too high, and further improve the cycle time. The forming height (H) is the height of the formed portion (Wa) of the plate material (W), and may be a height determined based on a predetermined standard. For example, the “forming height (H)” may be a height protruding from the upper surface of the plate material by the forming process, or may be formed from a predetermined reference height position such as a die upper surface height position (DH). May be the height up to the upper end of the portion (Wa).

Further, in these constructions, there is provided an inside / outside judgment means (32) for judging whether a portion to be punched on the plate material (W) is an inner periphery machining or an outer periphery machining, and according to the judgment result of this means (32). Alternatively, the punch standby height control means (29) may control the punch standby position to a position higher than the normal standby height only during the inner peripheral machining. In the case of performing the outer peripheral processing, except for a special punched product, the forming portion (Wa) does not pass through the position (P) of the processed portion (12) when the plate material is moved. Therefore, by providing the inside / outside determination means (32) and performing the punch standby position control by omitting the determination of the presence or absence of the forming processing during the outer peripheral processing, the processing is simplified and the control is simplified. Can be achieved. The determination of the outer peripheral machining or the inner peripheral machining may be performed based on the discrimination information between the inner peripheral machining and the outer peripheral machining described in the machining program (20).
Further, it may be performed by comparing each sheet material feed command of the processing program (20).

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. This punch press includes a punch press mechanism 1A and a control device 1B. The punch press mechanism unit 1A includes a plate material moving unit 11 that moves the plate material W and positions the plate material W at a predetermined position, and a processing unit 12 that performs a forming process and a punching process on the positioned plate material W. As shown in FIG.
1 is to hold the plate material W on the work table 8 by the work holder 7 and move the carriage 9 back and forth, and by moving the cross slide 10 mounted on the carriage 9 and the cross slide 10 to which the work holder 7 is attached, to move the plate material W to the table. 8 is moved in the front-back direction (Y direction) and the left-right direction (X direction). On the upper surface of the table 8, a free bearing (not shown) for sliding the plate material W is provided. The carriage 9 and the cross slide 10 are driven by servo motors 17 and 18, respectively.

The processing portion 12 is provided with a punching tool via upper and lower die holders 2 and 2 respectively holding a punching die 4 and a die die 5 and a ram 6 at a punching position P which is a center position of the processing portion 12. A punch drive mechanism 13 for moving the mold 4 up and down. The punch driving mechanism 13 may be a mechanical type or a hydraulic type as long as it has a variable stroke. In this embodiment, the rotation of the servomotor 14 is controlled by a rotation / linear motion conversion mechanism. The servo motor drive system converts the operation into a raising / lowering operation of the ram 16 via the motor 15. The upper and lower mold holders 2 and 2 hold a plurality of punch dies 4 and die dies 5, and move the desired dies 4 and 5 to a punch position P by movement by die indexing means (not shown). In this example, a turret is used. Instead of the turret, a cartridge (not shown) that can be linearly advanced and retracted may be used as the mold holder 2.
Some of the punch mold 4 and the die mold 5 installed in the mold holders 2 and 2 are molds for molding, and
The rest are for drilling. The molding die 2 includes, for example, a louver, a lance, a knockout,
It is assumed that dowels and the like are processed.

FIG. 3 shows a specific example of a punch die 4 and a die die 5 for molding. In the punch press, the punch die 4 is made concave and the die die 5 is made convex so that the portion protruded by the molding process faces upward for the purpose of feeding the plate material. The punch die 4 is provided with a concave portion 4c for molding on the lower surface of a punch die main body 4a fixed to a punch holder 4b. The die mold 5 includes an ejector plate 5c around a die mold body 5a fixed to a die holder 5b.
The ejector plate 5c can be elastically lowered and raised and returned by the guide part 5d and the elastic body 5e. According to the molding dies 4 and 5, the plate material W on the ejector plate 5c is engaged with the recess 4c of the punch dies main body 4a and the die dies main body 5a as the punch dies 4 descend. , A molded portion that is convex upward is molded.

The control device 1B shown in FIG. 1 will be described. The control device 1A is composed of a computer-based NC device and a programmable machine controller (PMC). The control device 21 decodes and executes the machining program 20; a mold parameter storage means 25; , Forming presence / absence determining means 24 and forming processing position / height storing means 2
6 and a punch standby height control means 29. The arithmetic control unit 21 includes a CPU, storage elements such as a RAM and a ROM,
And a control program and the like stored in these storage elements, and includes a punch operation control unit 22 and a plate material movement control unit (not shown) in addition to a machining program decoding unit (not shown). In accordance with the feed command of the machining program 20, the plate material movement control unit controls the servo controller 2 of each axis.
These are means for controlling the driving of the servo motors 17 and 18 of the respective axes of the plate material moving means 11 via the members 6 and 27 (FIG. 2).
The punch operation control unit 22 is means for controlling the servo motor 14 of the punch drive mechanism 13 via the servo controller 28 (FIG. 2) in accordance with a punch command of the machining program 20, and the ram 6 moves up and down at a predetermined speed curve. Drive the servo motor 14 as described above.

[0012] The mold parameter storage means 25 is provided for each mold.
This is a means for storing parameters related to each molding die type.
The forming height H is stored for each type. Category setting
As shown in FIG. 1 (B), the means 23 is provided for the plate material W as a raw material.
This is a means of dividing the entire area into a vertical and horizontal grid.
A code indicating the position in the X direction for each unit area
(X_i) And a code (Y_j) And address
(X _i, Y_j) Is given. Each unit area (X_i, Y
_j) Is, for example, a square having a side of 10 cm.
The division by the division setting means 23 is performed based on the work coordinates.
May be performed in machine coordinates. Molding presence / absence determining means 23
Represents each unit area (X_i, Y_j) Formed part
This is a means for determining whether or not (Wa) is present. This molding
The determination processing by the presence / absence determination means 23 is performed by the processing program 2
0 based on the information read by the arithmetic control unit 21
For example, it is performed each time the forming process is performed. Molding presence / absence determination means
23 is a unit area having a molded portion (Wa)
(X_i, Y_j), The gold used in the forming process
The mold forming height H is obtained from the mold parameter storage means 25.
Read out the data and store it in the forming position / height storage means 26 described later.
It also has the function of storing. In this case, the same unit area
(X_i, Y_j) Has a plurality of forming processing parts Wa,
The highest processing height H is stored.
The processing for storing the highest molding processing height H is
Unit area (X_i, Y_j) Has a forming part (Wa)
Each time it is determined that
Compared to the stored processing height H, the higher height
For example, a process of updating the stored content is employed.

The forming position / height controlling means 26 determines the presence or absence of forming by the forming presence / absence determining means 24 in accordance with the unit area (X _i , Y _j ) divided by the section setting means 23. The table is provided as a table for storing the molding height. Forming position / height control means 26
Of the tables that comprise the unit area (X _i, Y _j) between the molding presence of the storage area, is configured is molded position storage unit 27, the unit area (X _i, Y _j) between the molding height The storage area constitutes a forming height storage unit 28.
In the storage area of the forming height by the forming position / height control means 26, the processing used in the unit area (X _i , Y _j ) by the processing of the forming presence / absence determining means 24 as described above. The molding height H of the mold is read from the data stored in the mold parameter storage means 25 and stored.

The punch standby height control means 29 includes a punch 4
Is a means for setting a height at which the robot returns to the upper dead position after returning to the bottom dead center and waits, and instructs the punch operation control means 22 to the height. The punch standby height control unit 29 includes a passing interference determination unit 30, a standby height setting unit 31, and an inside / outside determination unit 32. The punch standby height control unit 29 sets the normal punch standby height to a minimum height that does not interfere with the feeding of the sheet material in the drilling process. According to the instruction, the set height is changed as follows.

The passing interference judging means 30 includes an arithmetic control unit 21
In accordance with the plate material feed command of the processing program 20 read in the above, when the plate material W is to be moved from now on, the relative movement path of the punch position P passes through the unit area (X _i , Y _j ) where the forming is performed. This is a means for determining whether or not there is a passing interference. In this determination, if any of the unit regions (X _i , Y _j ) to be determined has a forming portion (Wa), it is determined that there is passing interference. In this determination, in the case of movement along the X direction or the Y direction, the unit areas (X _i , Y _j ) arranged in the X direction or the Y direction
Although only the determination target is determined, when moving obliquely, it is often not possible to determine the passage locus due to the speed and acceleration of each axis. Therefore, all the unit areas (X _i , Y _j ) that can pass through are determined. It is a judgment target. For example, all the unit areas (X _i , Y _j ) including both the X-direction range and the Y-direction range of the moving route are set as determination targets.

If the passing interference judging means 30 judges that there is interference, the standby height setting means 31 forms the unit area (X _i , Y _j ) for which the presence or absence of passing interference is to be judged. The largest forming height H among the heights H is selected, and a height position slightly higher than this is set as the standby height.

The inside / outside judging means 32 is a means for judging whether a portion to be punched is an inner peripheral machining or an outer peripheral machining.
The standby height setting means 31 determines whether the punch standby height control means 2
The control of the punch standby position to a position higher than the forming height H according to No. 9 is performed. The outer peripheral processing is processing for cutting the outer periphery of the plate material w to be a product from the plate material W to be a material by continuous drilling, and the inner peripheral processing is processing to be performed inside the plate material w to be a product. . The determination of the outer peripheral machining or the inner peripheral machining may be performed based on the discrimination information between the inner peripheral machining and the outer peripheral machining described in the machining program (20). May be compared.

An example of the operation of controlling the standby height with the above configuration will be described. As shown in FIG. 1B, after each forming portion Wa of the plate material W is formed, the plate material W is driven by the plate material moving means 11 according to a feed command of the processing program 20 to form the processing portion 12 ( The case where the punch position P) moves along the path of the straight line a in the X direction and the case where the punch position P moves along the oblique line b will be considered. In the forming position / height storage means 26, when the forming processing of each forming part Wa is performed, the unit area (X _i , Y _j ) shows the judgment result of molding existence,
The molding height H is stored. The straight line a in FIG.
When the punch position P moves, the unit regions (X ₃ , Y ₃ ) and (X ₄ , Y ₃ ) including the passing path do not include the forming processing part Wa. Therefore, the standby height setting means 31 sets the standby height to the normal standby height. In the figure, a portion indicated by a reference symbol Wb (a hatched portion)
Indicates a portion to be drilled, and a portion indicated by reference numeral Wa indicates a formed portion. In the case where the punch position P moves on the straight line b in the drawing, the molding region Wa is included in the unit areas (X ₂ , Y ₂ ) and (X ₃ , Y ₂ ). Therefore, the standby height setting means 31 calculates the unit areas (X ₂ , Y ₂ ), (X ₃ , Y ₂ )
The standby height of the punch 4 is set at a position slightly higher than the higher molding height among the molding heights H stored in the molding position / height storage means 26.

When the above-mentioned straight lines a and b pass, both are operations during the inner peripheral machining, but in the case of the outer peripheral machining, the standby height is determined based on the result of the inner / outer judging means 32 determining that the outer peripheral machining is being performed. The setting unit 31 sets the normal standby height. In the case of performing the outer peripheral processing, except for a special punched product, the formed processing portion Wa does not pass through the punch position P when the plate material is moved. For this reason, by providing the inside / outside determination means 32 and controlling the punch standby position regardless of the forming height H during the outer peripheral processing, the control can be simplified without hindering the processing. .

[0020]

The punch press according to the present invention comprises: a forming position storing means for storing a forming position of a sheet material being processed; and a sheet material moving means for moving the sheet material by the sheet material moving means.
When the processing section passes through the forming position stored in the forming position storage means, the punching standby height control means for waiting the punch at a position higher than the normal standby height, and The effect is obtained that the cycle time and the processing time when molding is performed can be reduced by simple control. In addition, there is provided a section setting means for dividing the plate material into a vertical and horizontal lattice shape, and a molding presence / absence determining means for determining whether or not each of the unit regions divided by this means and arranged in the vertical and horizontal directions has a formed portion of the plate material. Wherein the forming processing position storage means stores the determination result of the presence or absence of forming processing for each unit area, and the punch standby height control means performs the forming when the plate material is moved by the plate material moving means. If there is a passing interference determination means to determine whether or not a unit area with processing passes the position of the processing portion, and if the punch is to wait at a position higher than the molding processing height when passing, Calculation processing as to whether or not the processing portion passes through the forming processing portion can be easily performed, and control is further simplified. Further, there is provided a forming height storing means for storing a forming height of each position where the forming of the plate being processed is performed, and the punch standby height controlling means is stored in the forming height storing means. If the punch is made to stand by at a position slightly higher than the forming height, the optimum standby height can be controlled according to the individual forming process, further reducing the waste time due to the standby height being too high. Cycle time can be further improved.

[Brief description of the drawings]

FIG. 1A is an explanatory diagram of a conceptual configuration of a punch press according to an embodiment of the present invention, and FIG. 1B is an explanatory diagram of a method for dividing the area and an example of a forming process.

FIG. 2 is a side view of a mechanism section of the punch press.

FIG. 3 is a cutaway side view of a die of the punch press.

[Explanation of symbols]

Reference Signs List 1A: Punch press mechanism 1B: Control device 2: Mold holder 4: Punch die 5: Die die 6: Ram 11: Plate material moving means 12: Processing unit 20: Processing program 21: Operation control unit 22: Punch Operation control means 23 ... Segment setting means 24 ... Molding presence / absence determination means 25 ... Mold parameter storage means 26 ... Moulding position / height storage means 27 ... Moulding position storage means 28 ... Moulding height storage means 29 ... Punch standby height control means 30 ... pass through the interference judging means 31 ... waiting height setting means 32 ... outside judgment unit H ... molding height P ... punching position W ... sheet Wa ... molding part Wb ... drilling site X _i, Y _j ... unit area

Claims (3)

[Claims] 1. A punch press having a plate material moving means for moving a plate material and positioning the plate material at a predetermined position, and a processing part for forming a processed plate material, wherein the punch material is formed by processing the plate material being processed. A forming position storing means for storing a position, and when the plate material is moved by the plate material moving means,
A punch press comprising punch standby height control means for making a punch stand by at a position higher than a normal standby height when the processing section passes through a molding position stored in the molding position storage means. 2. Forming means for classifying a plate material in a vertical and horizontal lattice form, and determining whether or not each of the unit regions divided by the means has a formed portion of the plate material. The presence / absence determination means is provided, and the molding-possible processing position storage means stores the determination result of the presence / absence of molding processing for each of the unit areas, and the punch standby height control means, when the plate material is moved by the plate material movement means Has a passing interference determining means for determining whether or not a unit area where molding is performed passes through the position of the processing section, and when passing, the punch is made to stand by at a position higher than the molding height. The punch press according to claim 1. 3. A forming height storing means for storing a forming height at each position where the forming of the plate being processed is performed, wherein the punch standby height controlling means includes a forming height storing means. The punch press according to claim 1 or 2, wherein the punch is made to stand by at a position slightly higher than the forming height stored in the punch press.