JP3284938B2 - Punch press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a punch press such as a turret punch press.

[0002]

2. Description of the Related Art Generally, when a large number of holes are machined by a punch press, the hole is generally moved from near the side opposite to the side gripped by a work holder of a plate material moving device and along this side. The drilling is performed, and the drilling is performed so as to gradually drill a portion closer to the work holder. However, when the drilling is performed in this manner, a warp is often generated such that the vicinity of the processed portion of the plate material, that is, the end portion remote from the work holder rises. If the processing is continued in a state where the end of the plate material is warped such that it rises, the warped portion of the plate material may interfere with the inside of the punch holder hole of the upper turret at the time of feeding the plate material, and the feed of the plate material is continued as it is. As a result, the plate material is forcibly deformed, and an excessive load acts on the plate material feeding device, which may damage the plate material feeding device.

An object of the present invention is to provide a punch press which can solve such a problem and detect warpage of a plate material to prevent breakage of a plate material moving means caused by warpage of the plate material. I do.

[0004]

A punch press according to the present invention comprises a punch press having an upper frame, a lower frame, and a column.
And inch frame, and the upper mold support part on which is installed in the frame, set the lower frame below the upper mold support portion
A lower mold support portion on which the plate material is placed, a plate material moving means for passing the plate material between the two support portions, a warp detection means for detecting the warpage of the plate material, and the warp when the warp is detected. A warp detection control unit for stopping or retreating the plate material movement by the plate material moving unit. The board
The material moving means moves the plate material back and forth and left and right on the work table.
Moving the carriage back and forth.
The slide is mounted so that it can be driven forward and backward.
Multiple work holders are mounted side by side on a slide
It was broken. The warp detecting means includes:
The projector or receiver provided on the
Provided on the column of the camera facing the projector or receiver
Optical transmitter / receiver in combination with a selected receiver or sender
Means . According to this configuration, when an upward warp occurs in the plate material due to the punching, the warp detection unit detects the warp, and in response thereto, the warp detection time control unit stops the plate material movement by the plate material moving unit. Or retreat. Therefore, it is possible to prevent the sheet material moving means from continuing to be moved by the sheet material moving means while the warped portion of the sheet material interferes with the upper mold supporting portion, thereby preventing the sheet material moving means from being damaged by overload.

[0005] In the above configuration, the warp detecting means includes:
It may be configured to detect that the warped portion of the plate material is located slightly below the lower surface of the upper mold supporting portion. In the case of this configuration, since the warpage can be detected before the warped portion of the plate material interferes with the upper mold supporting portion, breakage of the plate material moving means due to the warpage of the plate material can be reliably prevented. Also, since the warpage detecting means does not detect when the warpage of the plate is small, it is possible to stop the punch press unnecessarily and reduce productivity when the warpage of the plate does not interfere with the upper mold supporting portion. Can be avoided. Further, in the above configuration, the warp detecting means is constituted by a light transmitting / receiving means for transmitting light between the upper mold supporting portion and the lower mold supporting portion, and the light passing direction is a processing direction of the plate material. It may be different from that.
Since the warpage of the plate material often occurs in a direction orthogonal to the processing direction, the light passing direction is made different from the processing direction of the plate material as described above, so that the number of light beams to be transmitted is small. In addition, it is possible to reliably detect the warpage of the plate material. Therefore, it is possible to reliably detect the warpage of the plate using the warp detecting means having a simple configuration including the optical transmitting / receiving means and the warp detecting means having a small number of installations.

[0006]

FIG. 1 shows a first embodiment of the present invention.
It will be described with reference to FIG. FIG. 1 is a conceptual diagram of a punch press according to this embodiment, and FIG. 2 is a plan view of the punch press. This punch press comprises an upper frame 1a and a lower frame 1b of a punch frame 1 having a C-shaped side surface.
A turret punch press in which an upper turret 2 and a lower turret 3 are installed coaxially with each other. Upper frame 1a
The upper turret 2 is provided rotatably via a rotary shaft 4, and the lower turret 3 is mounted on a lower frame 1 b via a rotary shaft 5.
Are provided rotatably. The upper turret 2 is an upper die supporting portion in which a plurality of punch holder holes into which a punch tool 6 as an upper die is fitted are arranged on a circumference, and the lower turret 2 is a lower die corresponding to each punch tool 6. This is a lower mold support portion in which a plurality of die tools 8 are similarly arranged on the circumference.

The index drive mechanism 9 for the upper and lower turrets 2 and 3
The drive of the common indexing motor 10 is distributed to the upper and lower turrets 2 and 3 and transmitted by the chain mechanisms 11 and 12. The punch drive mechanism 13 raises and lowers the punch tool 6 by the ram 14 at the punch position P, and includes a motor 15 as a drive source, a flywheel 16, and the like, and is installed on the upper frame 1a.

At the front of the lower frame 1b, a work table 17 on which the plate material W is mounted, and a plate material movement for moving the plate material W back and forth (Y-axis direction) and left and right direction (X-axis direction) on the work table 17 A work feeding mechanism 18 as a means is provided. The work table 17 includes a fixed table 17a at the center, and left and right slide tables 17b, 17b that move back and forth (Y-axis direction) on the rails 19. The work feed mechanism 18 has a carriage 20 formed integrally with the slide tables 17b on both sides and moving back and forth.
1 is mounted. The carriage 20 includes a Y-axis servomotor 22 and a Y-direction feed screw 23 directly connected to the Y-axis servomotor 22.
And a ball nut 24 provided on the carriage 20 and meshing with the feed screw 23, to move forward and backward. The cross slide 21 includes an X-axis servomotor 25 installed at an end of the carriage 20, an X-axis feed screw 26 directly connected to the carriage 20, and a ball nut 27 provided on the cross slide 21 and meshing with the feed screw 26. A plurality of work holders 28 are mounted side by side on the left and right.

The Y-axis servo motor 22 has an encoder 29, which outputs the Y-axis coordinate data of the carriage 20, that is, the Y-axis coordinate data of the work holder 28. The encoder 30 is also provided in the X-axis servo motor 25, and outputs the X-axis coordinate value data of the cross slide 21, that is, the X-axis coordinate value data of the work holder. That is, the two encoders 29 and 30
, The current position of the work holder 28 is detected. The work holder 2 is moved by the forward and backward movement of the slide tables 17b and 17b and the left and right movement of the cross slide 21.
The plate material W gripped at 8 is moved from the table to the lower turret 3
It is sent to the upper punch position P.

In the punch press having such a basic structure, in this embodiment, a warp detecting means 31 is provided so as to detect the warp of the plate material W caused by the progress of the punching. The warp detecting means 31 is provided on the carriage 20 and emits light rearward (in the Y-axis direction). The projector 31a is provided on the column 1c of the punch frame 1 so as to face the light emitter 31a, and detects the light from the projector 31a. This is an optical transmission / reception means that is combined with a light receiver 31b that receives light. These light emitter 31a and light receiver 31b
Is a height position between the upper and lower turrets 2 and 3 and is set at a height position where light from the light projector 31 a is projected slightly below the lower surface of the upper turret 2. Although FIG. 2 shows only one set of the warp detecting means 31 for simplification of the drawing, a plurality of sets may be arranged at predetermined intervals in the X-axis direction. Further, the projector 31a is provided on the column 1c side of the punch frame 1, but it may also be provided with a light receiver 31b to the carriage 20 side.

The control means 32 controls the entire operation of the punch press, and comprises a numerical controller, a programmable controller and the like. This control device 3
2 is provided with a warp detection time control unit 32a for stopping the movement of the plate material by the work feeding mechanism 18 when the warp detection unit 31 detects the warpage of the plate material W.

Referring to FIG. 3, a control operation performed by control device 32 when warpage is detected will be described. As shown in FIG. 3A, the plate material W is intermittently moved in the left-right direction (X-axis direction) perpendicular to the light passing direction (Y-axis direction) of the warp detecting means 31 by the plate material movement by the work feeding mechanism 18. If the punching is repeated, a warp a may occur on the punched side of the plate material W as shown by hatching in the figure. When the warp a is large enough to be located slightly below the lower surface of the upper turret 2 as shown in FIG. 3B, the light emitted from the projector 31a of the warp detecting means 31 Blocked by warpage a. That is, the warp means 31
Detects the warpage a of the plate material W. In response to this, the warpage detection control means 32a of the control device 32 stops the movement of the plate material by the work feed mechanism 18. As a result, it is possible to prevent a situation in which the warp a interferes with the upper turret 2 due to the movement of the plate material W, overloads the work feed mechanism 18 and damages the work feed mechanism 18.

Further, the warp detecting means 31 detects the warp a only when the warp a of the plate material W becomes slightly lower than the lower surface of the upper turret 2, and when the warp a is small, Is not detected, so that even if a warp a small enough not to interfere with the upper turret 2 occurs, the punch press is not stopped unnecessarily,
Does not cause a decline in operation. Furthermore, since the optical transmission / reception means is used as the warp detection means 31, the configuration is simplified. Also, the warpage of the plate material W often occurs in a direction orthogonal to the processing direction (the direction in which punch holes are sequentially formed), so that the light passing direction is changed to the processing direction of the plate material W as described above. (X-axis direction), even if the number of light beams to be transmitted is small, the plate material W
Warpage can be reliably detected.

In the above-described embodiment, the case in which the movement of the plate material by the work feed mechanism 18 is stopped when the warp is detected, but the present invention is not limited to this. The mechanism 18 is shown in FIG.
In (A), for example, it may be retracted to the near side (Y-axis direction). As described above, in order to retreat or stop at the front side when detecting the warpage, it is possible to prevent the plate material W from being damaged and to prevent the work feeding mechanism 18 from being overloaded, as compared with, for example, continuing the processing at a reduced speed when detecting the warpage. becomes a certainty, Ru can be done safely processing.

FIG. 4 is a schematic plan view of a main part of the reference proposal example . In this proposed example , in the punch press of the embodiment shown in FIGS. 1 to 3, the light projector 31a and the light receiver 31b of the warp detecting means 31 are arranged in the left-right direction (X-axis direction). Other configurations are the same as those in the embodiment of FIGS. In the case of this punch press, when punching is repeated while intermittently moving the plate W in the front-rear direction (Y-axis direction) by moving the plate by the work feed mechanism 18,
When a warp a occurs on the punched side of the plate material W as shown by hatching in the figure, the warp a is detected by the warp detecting means 3.
1 can be detected.

FIG. 5 is a schematic plan view of a main part of the second embodiment. In this embodiment, the projector 31a and the light receiver 31b of the warp detecting means 31 are arranged in the front-rear direction (Y-axis direction) and the left-right direction (X-axis direction) in the punch press of the embodiment of FIGS. Things. Other configurations are the same as those in the embodiment of FIGS. In the case of this punch press, the warp a of the plate material W generated when the punching is repeated while intermittently moving the plate material W in the left-right direction (X-axis direction) by the plate material movement by the work feeding mechanism 18.
In addition, it is possible to detect warpage a that occurs when punching is repeated while moving in the front-rear direction (Y-axis direction).

FIG. 6 is a conceptual diagram of a punch press according to a third embodiment. In this embodiment, in the punch press of the embodiment shown in FIGS. 1 to 3, the control device 32 is provided with a current position storage means 33 for storing the position of the plate material W at the time of detecting the plate material warpage as coordinate value data. A warp position detecting means 34 for detecting the warp position of the plate material W detected by the detecting means 31 is provided. The control device 32 has a direction in which the warp position moves toward the punch holder installation hole of the upper turret 2 when the warp is detected. In order not to interfere with the movement of the sheet material, the work path of the sheet material W is changed to the previous movement path, the sheet material is moved by the work feeding mechanism 18, and a control function of aligning the next punch target position with the punch position P is provided. Things. Other configurations are the same as those in the embodiment of FIGS. The warpage may decrease with the progress of the punching process.
When moving in the direction to retract from the punch holder installation hole of
Since there is no problem such as breakage due to interference, the moving path of the plate material W is changed so that the warp detected by the warp detecting means 31 does not interfere with the upper turret 2 as described above, and the punching is performed thereafter. Feed mechanism 18 caused by
Not only can be prevented, but also a decrease in the operating rate of the punch press can be avoided.

[0018]

The punch press according to the present invention comprises an upper mold supporting portion, a lower mold supporting portion provided below the upper mold supporting portion for mounting a plate material, and a plate material interposed between the two supporting portions. A sheet material moving means for passing the sheet material, a warp detection means for detecting the warpage of the sheet material, and a warp detection time control means for stopping or retreating the sheet material movement by the sheet material moving means when the warpage is detected, Detects the warpage of the plate,
The breakage of the plate moving means due to the warped portion of the plate can be prevented. When the warp detecting means detects that the warp portion of the plate material is located slightly below the lower surface of the upper mold supporting portion, it is possible to reliably prevent breakage of the plate material moving means due to the warp of the plate material. Can be prevented. In addition, when the warpage of the plate material does not interfere with the upper mold supporting portion, the punch press is stopped unnecessarily to thereby reduce the operation rate. Further, the warp detecting means is constituted by light transmitting / receiving means for transmitting light between the upper mold supporting part and the lower mold supporting part, and the light passing direction is made different from the processing direction of the plate material. In this case, the configuration of the warpage detecting means is simplified, and even if the number is small, the warpage of the plate material can be reliably detected.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a punch press according to a first embodiment of the present invention.

FIG. 2 is a plan view of the punch press.

FIG. 3 is an operation explanatory view of the punch press.

FIG. 4 is a plan view of a main part of a punch press according to a reference proposal example .

FIG. 5 is a plan view of a main part of a punch press according to a second embodiment.

FIG. 6 is a conceptual diagram of a punch press according to a third embodiment.

[Explanation of symbols]

2: Upper turret (upper die support) 32a: Control means at the time of detecting warp 3: Lower turret (lower die support) W: Plate 18: Work feed mechanism (plate moving means) a: Warp 31: Warp detection

Claims (3)

(57) [Claims] 1. A punch frame having an upper frame, a lower frame, and a column, an upper mold supporting portion installed on the upper frame, and a plate material installed on the lower frame below the upper mold supporting portion. A lower mold support portion to be placed, a plate material moving means for passing a plate material between the two support portions, a warp detecting means for detecting the warpage of the plate material, and a warp detecting means for detecting the warp of the plate material. Control means for stopping or retreating the plate material at the time of warpage detection, wherein the plate material moving means moves the plate material back and forth and left and right on the work table, and the cross slide advances and retreats to the carriage which moves back and forth. A plurality of work holders are mounted so as to be drivable, and a plurality of work holders are mounted side by side on the cross slide, and the warp detecting means includes a light projection provided on the carriage. Light transmitting / receiving means comprising a combination of a light receiving device or a light emitting device provided opposite to the light emitting device or the light receiving device on a column of the punch frame with the light emitting device or the light receiving device, wherein the upper mold supporting portion and the lower mold supporting portion are provided. A punch press that allows light to pass between the part. 2. The upper mold support and the lower mold support are provided.
Re is a top turret and the lower turret, respectively, before Symbol warp detection means is small to the extent there is no fear interfere with the upper turret
The projector and the projector at a height position where the warpage of the plate material is not detected.
The punch press according to claim 1 , wherein the light receiver is set . 3. The light transmitter / receiver provided on the carriage in the optical transmission / reception means is provided on the carriage so as to be located closer to a column side of the punch frame than the cross slide. Punch press.