JPH0756094Y2 - Turret punch press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a turret punch press having a detection function of detecting a forbidden area where a work clamp interferes with a punch, that is, a dead zone area.

(Prior Art) Conventionally, in a turret punch press, if a punch command is issued and punching is performed after positioning of a punch and a work to be machined in a machining station is completed, a work lamp interferes with the punch. Hereafter, it is possible to check the dead zone.), So there is no problem. However, in actuality, in order to secure the hit rate, the punch command is issued while the speed command is being issued. Therefore, the dead zone area is taken in excess of the area actually required (corresponding to each mold size).

(Problems to be solved by the invention) By the way, in the above-mentioned conventional turret punch press,
Since the dead zone area is an extra area than the required area, the work clamp does not interfere with the punch and die,
Even when it is possible to barely perform punching, there is a problem in that the punch prohibition operation means often works and the punch does not operate, which lowers the operation rate.

The purpose of this invention is to re-detect the case where the work lamp enters the area beyond the necessary area in the actual dead zone without stopping the punching operation even if it detects that the work lamp has entered the necessary area. The purpose of the present invention is to provide a taretti punch press that improves the operating rate by stopping the punching operation.

[Structure of Device] (Means for Solving the Problem) In order to achieve the above object, the present invention moves a carriage base (31) in the Y-axis direction and carries it to the carriage base (31). Work clamp (3) provided on the carriage (33) by moving (33) in the X-axis direction.
Position the desired position of the workpiece (W) clamped in 5) to the processing position of the processing station 21, mount multiple punches (17) and dies (19) respectively, and rotate the lower turret (13, 15) At least the selected punch (17) and die (19) are indexed to the processing position of the processing station (21), and the work (W) is punched by the cooperation of the punch (17) and the die (19). The turret punch press (1) for carrying out the above, wherein a forbidden area command means (51) for commanding a forbidden area in which the tip of the work clamp (35) interferes with each of the punches (19), and the plurality of punches (17). ), The size of the punch for storing (radius r _n ) and the memory (71), and the processing station coordinates for storing the processing position coordinate value P (P _X , P _Y ) in the processing station (21). Value / Memory (73) and the punch Size, memory (71), machining station coordinate value, size of punch (17) (radius r _n ) stored in the memory (73), and coordinate value P (P _X , P _Y ) of the machining position On the basis of the above, based on a command from the prohibited area command means (51), the X-axis and Y-axis for storing the prohibited areas (DZ · X _n , DZ · Y _n ) for the X-axis and Y-axis in advance are stored. Axis prohibition command area memory (65, 75), X-axis,
Prohibition area (DZ ・ X _{n + 1} , DZ ・ Y _n ) of punch (17) one rank larger than the size of the punch (17) instructed stored in Y-axis prohibition instruction area memory (65,75) ₊₁ ) and a coordinate circuit (77) for comparing the coordinate values (C _X , C _Y ) from the origin at the tip of the work clamp (35) with the X-axis, Y
Prohibition area (DZ ・ X _n , DZ ・ Y _n ) for the commanded punch (17) stored in the axis prohibition command area memory (65,75)
And a re-comparison circuit (79) for comparing the coordinate values (C _X , C _Y ) from the origin at the tip of the work clamp (35),
It is characterized by comprising.

(Function) By adopting the turret punch press of the present invention, prohibition of commanding a prohibited area in which the tip of the work clamp (35) interferes with the punch (17) in accordance with the commanded size of the punch (17) When the prohibited area is commanded by the area command means (51), the command for the punch (17) which is one rank larger than the commanded punch (17) is used to command the prohibited command area memory (6
7,75) forbidden area (DZ ・ X
_{n + 1} , DZ · Y _{n + 1} ) and the coordinate values (C _X , C _Y ) from the origin at the tip of the work clamp (35) are taken into the comparison circuit (77) and compared, and the work ( After the desired position of (W) is positioned at the machining position, the X-axis and Y-axis prohibition regions (DZ · X _n , DZ) stored in the X-axis and Y-axis prohibition command region memories (67, 75) are stored.・ Y _n ) and the coordinate values (C _X , C _Y ) from the origin at the tip of the work clamp (35) are the re-comparison circuit (79).
And the coordinate values (C _X , C _Y ) of the tip of the work clamp (35) are compared to the prohibited area (DZ ・ X _{n + 1} , DZ ・ Y _{n + 1} ; DZ ・ X _n , DZ
・ When it enters into Y _n ), the punching operation stops and the work clamp (35) does not interfere, and the number of stop is smaller than the conventional one, and the operation rate is improved.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 7 and FIG. 8, the turret punch press 1 includes a lower frame 3 and an upper portion which are appropriately separated from each other so as to provide a work area 5 on the lower frame 3 and are integrally provided via a column portion 7. The frame 9 and the like constitute a frame body.

A punching section 11 for punching the work W is provided in an example of the work area 5 (on the left side in FIG. 7). The punching part 11 is a disc-shaped upper turret 13 and an upper turret which are rotatably mounted on the upper frame 9.
It is composed of a disc-shaped lower turret 15 and the like which are appropriately separated from each other and are rotatably mounted on the lower frame 3. The upper turret 13 is removably attached with a punch 17 which is arranged on a concentric circle around which the upper turret 13 rotates and which is appropriately spaced in the circumferential direction. An appropriate number of dies 19 corresponding to the plurality of punches 17 are detachably attached to the lower turret 15.

The upper and lower turrets 13 and 15 are synchronously rotated in the same direction by a turret drive mechanism (not shown), and are indexed and stopped at predetermined positions. The punch 17 mounted on the upper turret 13 is a striker that moves up and down at the processing station 21 via the ram operating portion 23 provided on the upper frame 9.
It is pressed by 25.

A fixed table 27 on which the work W is placed is provided on the other side (right side in FIG. 7) on the lower frame 3, and fixed in the front-back direction of the fixed table 27 (vertical direction in FIG. 8). The movable table 29 for mounting and supporting the work W together with the table 27 is in the left-right direction in the Y-axis direction (8th
It is mounted so as to be movable in the left-right direction in the figure.

The front and rear moving tables 29 are integrally connected at one end thereof via a carriage base 31 extending in the X-axis direction (vertical direction in FIG. 8) which is a direction orthogonal to the Y-axis direction which is the moving direction. This Carriage Base 31
A carriage 33 that is slidable in the same direction as the X-axis direction, which is the longitudinal direction of the carriage base 31, is mounted on the. An appropriate number of work clamps 35 that can clamp the end of the work W are mounted on the carriage 33 so as to be movable and fixed in the X-axis direction, which is the moving direction of the carriage 33.

A ball screw 37 to which the carriage 33 is attached is provided in the longitudinal direction of the carriage base 31, and an X-axis drive motor 39 is interlockingly connected to the ball screw 37 via a transmission member.

With the above configuration, when the X-axis drive motor 39 is driven,
Through the ball screw 37, the carriage 33 moves forward and backward (hereinafter,
It is called the X-axis direction. ) Will be moved to. One end of the carriage 31 is linked to the Y-axis drive motor 41, and the carriage base 31 is moved in the left-right direction (hereinafter referred to as the Y-axis direction) by driving the Y-axis drive motor 41. Will be. Therefore, the work W clamped by the work clamp 35 is moved in the X-axis and Y-axis directions.

Next, the X-axis detector and the Y-axis detector used in this embodiment will be described with reference to FIG.

In FIG. 6, the machine origin of the machine coordinate system is OM, and the center coordinates of the punches 17 of various sizes in the processing station 21 are P (Px, Py).

Punches 17 of various sizes installed in the processing station 21
Is, for example, r ₁ , r ₂ ,
…, Rn, r _{n + 1} . An example of the X-axis and Y-axis detection devices for the nth and n + 1th smallest punches among the punches 17 of various sizes will be described. The X coordinate of the center coordinate P (Px, Py) of the processing station 21 will be described. providing a limit switch LS _{n + 1} at the position of ± r _{n + 1} provided with a limit switch LSn to the position of ± r _n relative to the coordinates of the carriage base 31 which corresponds to. Further, dogs D ₁ and D ₂ are provided on the carriage 33 at the position where the work clamp 35 is attached.

Thus, the dead zone DZ · Xn, DZ · X _{n + 1} , which is a prohibited area in the X-axis direction in which the work clamp 35 collides with the punch 17 at the n, n + 1th position, has two limit switches LSn, L.
It is between S _{n + 1} . Therefore, by driving the X-axis drive motor 39 to move the carriage 33 in the X-axis direction and the dogs D ₁ or D ₂ (C _X ) come into contact with the limit switches LSn, LS _{n + 1} , respectively, and are turned on, Dead zone DZ / Xn, DZ / X
_{n + 1} will be detected. The dogs D ₁ and D ₂ and the limit switches LS _n and LS _{n + 1} are the X-axis detector. The detection signal detected by the X-axis detector is output by an OR circuit as shown in FIG. 5, for example.

On the other hand, the dead zone DZ · Yn, DZ · Y _{n + 1} , which is the prohibited area in the Y-axis direction where the work clamp 35 of the punch 17 at the n, n + 1th position collides, is calculated on the coordinates (Py
± r _n ) and (Py ± r _{n + 1} ), but in the present embodiment, (Py−
Only r _n ) and (Py−r _{n + 1} ) are used. In addition, when the tip of the work clamp 35 moves in the Y-axis direction, the Y coordinate between the tip of the work clamp 35 and the machine origin OM (O, O) is C.
Let y.

Therefore, the Y-axis drive motor 41 is driven to move the carriage base 31 in the Y-axis direction, and the Y-coordinate Cy of the tip of the work kump 35 and the Y-axis coordinate (Py-r _n ) which is the dead zone, (Py−r _{n + 1} ) and Cy ≧ (Py−
In the case of r _n ) or (Py−r _{n + 1} ), it is detected that the tip of the work clamp 35 has entered the dead zone DZ · Yn, DZ · Y _{n + 1} . Therefore, the Y-axis detection device is operated with the coordinates on the machine coordinates.

Next, the configuration of the control device in this embodiment will be described with reference to FIG. In FIG. 1, the CPU 4 in the control device 43
5 includes an input device 47 such as a keyboard via I / O.
Is connected from the input device 47 to the size of the punch 17 (radius r) and the center coordinate value P of the processing station 21.
(P _X , P _Y ) and the like are input to the CPU 45 in advance.

A display device 49 such as a CRT is connected to the CPU 45 via I / O, and various data and the like are displayed as necessary.

Dead zone area command means 51 is connected to the CPU 45 via I / O, and a dead zone area is commanded from the dead zone area command means 51 and input to the CPU 45.

The CPU 45 is connected to axis control units 57 and 59 via DP-RAMs 53 and 55, and further connected to the X-axis drive motor 39 and Y-axis drive motor 41 via amplifiers 61 and 63. There is. X
The tacho-generator T _G and the encoder E are connected to the drive motors 39 and 41 for the A-axis and the Y-axis, respectively. The positions of the carriage 33 and the carriage base 31 moved by the drive motors 39 and 41 for the X-axis and the Y-axis, respectively. Is detected by the encoder E.

An X-axis dead zone command area / memory 65 is connected to the CPU 45 via I / O. In the present embodiment, as shown in FIG. 6, the positions of the limit switches LSn, LSn _{+ 1} provided on the carriage base 31 are input from the input device 47 and are stored in the dead zone command area memory 65 for the X axis. Remembered.

An X-axis detection device 67 is connected to the CPU 45 via an I / F. In this embodiment, the dogs D ₁ and D ₂ provided on the carriage 33 corresponding to the position of the work clamp 35 are the limit switches L.
The detection signal as shown in Fig. 4 is CP when it abuts on Sn, LS _{n + 1} .
Input to U45.

The CPU45 has N for NC control of the turret punch press 1.
NC machining program memory that stores C machining program 6
9 is connected. The turret punch press 1 is NC controlled by the NC machining program stored in the NC machining program memory 69.

The CPU 45 is connected with various punch sizes / memory 71 and processing station coordinate value memory 73, and various punch sizes / memory 71 is input from the input device 47 to store the radius rn in this embodiment. To be done. Further, the processing station coordinates / memory 73 has a center coordinate P of the processing station 21.
(Px, Py) is set in advance, input from the input device 45 and stored.

A Y-axis dead zone command area / memory 75 is connected to the CPU 45, and the Y-axis dead zone command memory 75 has a punch size / radius stored in the memory 71.
r _n and the machining station coordinate values and the Y coordinate value Py of the machining station coordinate values stored in the memory 73 are taken in, and the calculation processing of DZ · Yn = (Py−r _n ) is performed and the Y axis is calculated. Dead zone area DZ · Yn is stored.

A comparison circuit 77 and a recomparison circuit 79 are connected to the CPU 45. When the nth punch command is issued, the dead zone region command means 51 first issues the n + 1th dead zone region DZ.Xn _{+ 1} , DZ.Yn _{+ 1} . That is,
Y-axis dead zone command area memory 75, Y-axis dead zone area DZ · Y _{n + 1} , and Y-axis drive motor
The Y coordinate value Cy of the tip of the work clamp 35 detected by the encoder E connected to 41 is taken in by the comparison circuit 77 and compared. In addition, the comparison circuit 77 takes in the X-axis dead zone command area DZ · X _{n + 1} stored in the memory 65 and takes the dog D ₁ from the X-axis detector 67. , D ₂ position is captured.

In this comparison circuit 77, Cy is compared with DZ · Y _{n + 1,} and Cy ≧ DZ
・ It becomes Y _{n + 1} and the dogs D ₁ and D ₂ are limit switches LS.
_When it comes into contact with _{n + 1} and is turned on, DZ · X _{n + 1} is detected.

Further, when the above conditions are satisfied, the nth dead zone area DZ · Xn, DZ · Yn from the dead zone area command means 51.
Is issued, the dead zone command area memory for the Y-axis
YZ dead zone area DZ · Yn stored in 75,
The re-comparison circuit 79 compares the Y coordinate value Cy of the tip of the work clamp 35 detected by the encoder E connected to the Y-axis drive motor 41. Further, the re-comparison circuit 79 fetches the X-axis dead zone command area DZ · Xn stored in the X-axis dead zone command area memory 65, and at the same time, X
The positions of the dogs D ₁ and D ₂ are fetched from the axis detecting device 67.

In the re-comparison circuit 79, Cy is compared with DZ · Yn, and Cy ≧ DZ
・ When it becomes Yn and the dogs D ₁ and D ₂ come into contact with the limit switch LSn and is turned on, DZ ・ Xn is detected. When such a condition is satisfied, the punching prohibition command signal is turned on from the re-comparison circuit 79 and the punching operation unit 23 is stopped.

The comparison circuit 77 and the re-comparison circuit 79 perform comparison processing based on the table shown in FIG. That is, the dead zone one rank higher is designated by the size of the die size commanded as the moving dead zone, and the comparison circuit 77
In the re-comparison circuit 79, the dead zone after the movement is compared with the commanded die size.

FIG. 3 shows a time chart for each command signal for operating the comparison circuit 77 and the re-comparison circuit 79. Third
In the figure, when the comparison circuit 77 detects that the tip of the work clamp 35 has entered the dead zone DZ _{n + 1} , the punch prohibition command signal is turned ON. Further, when the speed command signal is turned off and the positioning is completed, if the tip of the work clamp 35 is not in the dead zone DZn, the re-comparison circuit 79
When it is detected by, the punch prohibition signal turns off and
A punch command is issued and the punch operating unit 23 operates to perform punching.

The operation of the embodiment will be described with reference to the flow chart shown in FIG. In FIG. 2, an example in which the nth punch 17 is commanded from the smallest punch 17 of the punches 17 mounted on the upper turret 13 will be described. In step S1, it is determined whether positioning has been completed. If it is determined that the positioning has not been completed, it is determined in step S2 whether both dead zone command areas DZ ・ X _{n + 1} are ON, and dead zone command areas DZ ・ X _{n + 1} , DZ are determined.
If both Y _{n + 1} are ON, the punch prohibition command is turned ON in step S3, and the process returns to the front of step S1.

In the step S2, the dead zone command area DZ ・ X _{n + 1} , DZ ・ Y
_If both _{n + 1} are not ON, the process returns to the front of step S1.

If it is determined that the positioning is completed in step S1, the dead zone command area DZXn, DZ is determined in step S7.
・ It is judged whether both Yn are ON,
If the dead zone command areas DZ / Xn and DZ / Yn are both ON, the punching prohibition command is ON in step S8, and the ram working unit 23 is stopped.

If both dead zones DZ / Xn and DZ / Yn are not turned on in step S7, the process proceeds to step S4, the punch prohibition command is turned off, the punch command is issued in step S5, and punch processing is performed in step S6. The Rukoto.

(The flow of steps S4, S7, S4, S5, S6 corresponds to the time chart shown in FIG. 3.) In this way, when the nth punch 17 of the punches 17 is commanded, the work clamp While the 35 is moving in the X-axis and Y-axis directions, the n + 1th dead zone command area DZ
The comparison circuit 77 compares whether or not the tip of the work clamp 35 is included in X _{n + 1} , DZ · Y _{n + 1} , and the tip of the work clamp 35 is the n + 1th dead zone example area DZ ·
If it is not in X _{n + 1} , DZ ・ Y _{n + 1} , punching is performed, and if it is in this dead zone command area DZ ・ X _{n + 1} , DZ ・ Y _{n + 1} , the punt prohibit command is ON. Then, the positioning is further completed.

With the positioning completed, the tip of the work clamp 35 is the nth dead zone command area DZ / Xn, DZ.
If it is not in Yn, punching is performed, and if it is in this dead zone command area DZ, Xn, DZ, Yn, the punch prohibition command is turned on and the ram working unit 23 is stopped.

Thus, in this embodiment, the comparison circuit 77 and the re-comparison circuit 79 are compared, and the punch 17 is compared not only with the conventional work clamp 35 during the movement but also with the double comparison.
The number of times of stopping is significantly reduced, and the transfer rate can be improved. Also, punch 17 and work clamp 35
The number of collisions between and is reduced, and damage to the punch 17 and the work clamp 35 can be reduced.

Further, since the limit switch and the dog detection device are not used as the Y-axis detection device, it takes time to mount and adjust the limit switch, so that the coordinate system can be used for detection. The use of the limit switch and the detection device using a dog as the X-axis detection device is because of the work clamp 35
This is because the mounting position with respect to the carriage 33 is often changed depending on the work size, so that the trouble of changing the dead zone setting can be saved.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes. For example, in the present embodiment, the case where the X-axis detection device is a combination of the dogs D ₁ and D ₂ and the limit switches LSn and L _{a + 1} and the Y-axis detection device is the detection in mechanical coordinates has been described. Both the X-axis and Y-axis detection devices may be combined with a dog and a limit switch, or other detection devices such as a proximity sensor, or both the X-axis and Y-axis detection devices may be detected in mechanical coordinates. .

[Effects of the Invention] As can be understood from the above description of the embodiment, according to the present invention, the work clamp is inserted into an extra area than the necessary area in the actual dead zone during the movement of the work clamp. Even if this is detected, the punching operation is not stopped, and the punching operation is stopped only when it is detected again that the work clamp has entered the necessary area. Therefore, the operating rate can be improved.

As the punching operation is stopped less frequently, collision between the punch and the work clamp is reduced, and damage to the punch and the work clamp can be reduced as compared with the conventional case.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a control device in a turret punch press embodying the present invention, FIG. 2 is a flow chart showing the operation according to the present invention, and FIG. 3 is a time flow chart of each command in the operation according to the present invention. 4 and 5 are explanatory diagrams for explaining the dead zone checked by the comparison circuit and the re-comparison circuit, and FIG. 5 is an example diagram showing the detection circuit of the detection signal by the dog and limit switch in the X-axis detection device. FIG. 6 is an explanatory view for detecting a dead zone with an X-axis and Y-axis detection device, FIG. 7 is a front view of a turret punch press according to an embodiment of the present invention, and FIG. 8 is a view of FIG. FIG. 8 is a view taken along the line VIII-VIII. 1 …… Turret punch press, 17 …… Punch, 23 …… Ram operating part, 31 …… Cage base, 33 …… Cage, 35 …… Work clamp, 39 …… X-axis drive motor,
41 …… Y-axis drive motor, 43 …… Control device, 67 …… X-axis detector, 77 …… Comparison circuit, 79 …… Recomparison circuit, D ₁ , D
₂ …… Dog, LS _n , LS _{n + 1} …… Limit switch

Continuation of front page (56) Reference JP-A-1-133620 (JP, A) JP-A-51-94195 (JP, A) JP-A-62-237508 (JP, A) JP-A-60-247421 (JP , A) Actually open 59-85328 (JP, U) Actually open 61-182625 (JP, U) Actually open 62-127328 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A work clamp (35) provided on the carriage (33) by moving the carriage base (31) in the Y-axis direction and moving the carriage (33) in the X-axis direction with respect to the carriage base (31). ) Position the desired position of the work (W) clamped on the workpiece (W) at the processing position of the processing station 21, attach a plurality of punches (17) and dies (19) respectively, and rotate the lower turret (13, 15). The punch (17) and die (19) selected by the above are indexed to the processing position of the processing station (21), and the punch (17) and the die (19) cooperate with each other to perform punching processing on the work (W). A turret punch press (1) for performing, wherein the tip of the work clamp (35) is the punch (19).
Prohibited area command means (51) for commanding a prohibited area that interferes with the
A punch size / memory (71) for storing (radius r _n ) in the sizes of the plurality of punches (17); and a coordinate value P (P _X , P) of a processing position in the processing station (21). _Y )) Machining station coordinate value
Memory (73), punch size / memory (71), machining station coordinate values, punch (17) size (radius r _n ) stored in the memory (73), and machining position coordinate values P Based on (P _X , P _Y ), the prohibited area (DZ · X _n , DZ · Y _n ) for the X-axis and Y-axis is pre-calculated by a command from the prohibited-area command means (51). Of the X-axis and Y-axis prohibition command area memories (65, 75) and the commanded punches (17) stored in the X-axis and Y-axis prohibition command area memories (65, 75). Forbidden area for punches (17) that is one rank larger than the size (DZ ・ X _{n + 1} , DZ ・
Y _{n + 1} ) and a comparison circuit (77) for comparing the coordinate value (C _X , C _Y ) from the origin at the tip of the work clamp (35)
And the prohibited area (DZ / DZ) for the commanded punch (17) stored in the X-axis and Y-axis prohibited command area memory (65, 75).
X _n , DZ · Y _n ) and a re-comparison circuit (79) for comparing the coordinate value (C _X , C _Y ) from the origin at the tip of the work clamp (35). And a turret punch press.