JPH10216999A - Turret punch press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid a work clamp from being punched and to avid two or more stacked metal plates from being punched. SOLUTION: This press is provided with a height space arithmetic part, which computes a height space between a punch 9 and a die 13 based on a height position of a striker 39 when a pressure of an upper hydraulic pressure chamber 43 is rapidly increased, a discrimination part, which compares/ discriminates a computed height space and a thickness of one metal plate, and a control part, which controls to stop the pressure oil supply to an upper hydraulic pressure chamber 63 when the height space is larger than the thickness of one metal plate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a turret punch press having an upper turret and a lower turret.

[0002]

2. Description of the Related Art A conventional turret punch press will be briefly described below.

The turret punch press is based on a main body frame, and an upper turret having a plurality of punches and a lower turret having a plurality of dies are provided on the main body frame so as to face up and down. In order to position a predetermined punch and a predetermined die in the processing area, the upper turret and the lower turret can be rotated synchronously by driving a turret servomotor. In order to position the plate at a predetermined position between the upper turret and the lower turret, a carriage base extending in the x-axis direction is provided on the main body frame so as to be movable in the y-axis direction. Is provided with a carriage provided with a plurality of work clamps for clamping an end portion of a plate material so as to be movable in the x-axis direction. A striker for pressing a predetermined punch downward is provided at an upper position of the upper turret, and the striker moves vertically by the operation of a hydraulic cylinder having an upper hydraulic chamber and a lower hydraulic chamber. .

Accordingly, the upper turret and the lower turret are rotated by driving the turret servomotor to position a predetermined punch and a predetermined die in a processing area. or,
The carriage is moved in the x-axis direction with respect to the carriage base while the end of the plate material is clamped by the plurality of work clamps, and the carriage base is integrally moved with the carriage in the y-axis direction with respect to the main body frame. To place the plate at a predetermined position between the upper and lower turrets. Then, by supplying pressure oil to the upper hydraulic chamber, the striker is moved downward, and a predetermined punch is pressed downward to move downward with respect to the upper turret. Thereby, punching can be performed on the plate material by cooperation of a predetermined punch and a predetermined die.

[0005]

However, if the work clamp is located between a predetermined punch and a predetermined die when the plate is positioned at a predetermined position between the upper turret and the lower turret, the predetermined punch is not required. May cause punching of the work clamp. Alternatively, clamp two or more plates that are mistakenly overlapped with a work clamp,
When two or more plate materials overlapped between a predetermined punch and a predetermined die are positioned, two or more plate materials overlapped by the predetermined punch are punched at a time to form a die (punch, die). May cause damage.

[0006]

In order to solve the conventional problems as described above, according to the present invention, as a first means, an upper turret having a plurality of punches and a lower turret having a plurality of dies are provided. The upper and lower turrets are configured to be rotatable so that the turret is positioned vertically and the predetermined punch and the predetermined die are positioned in the processing area, and the plate is positioned at a predetermined position between the upper and lower turrets. For this purpose, a carriage provided with a plurality of work clamps for clamping the ends of the plate material is provided so as to be movable in the horizontal direction, and a striker for pressing a predetermined punch downward is provided above the upper turret. It is configured to be able to move up and down by the operation of a hydraulic cylinder equipped with a hydraulic chamber and a lower hydraulic chamber, and a pressure that detects a sudden rise in the pressure of the upper hydraulic chamber A sensor is provided, and a height position detector for detecting the height position of the striker is provided, and the height of the punch and the die at this time is determined based on the height position of the striker when the pressure in the upper hydraulic chamber rapidly rises. A height interval calculating unit for calculating the height interval, a determining unit for comparing and judging the calculated height interval and the thickness of one sheet material is provided, and the calculated height interval is one sheet. A control unit is provided for controlling the supply of the pressurized oil to the upper hydraulic chamber to be stopped when it is determined to be longer than the thickness of the plate material.

[0007] As a second means, in addition to the invention-specific matter of the first means, the control unit is determined by comparing the calculated height interval to be longer than the thickness of one sheet material. And a controllable configuration for generating an alarm.

[0008] As a third means, in addition to the invention-specifying items of the first or second means, a clamp detector for detecting that the work clamp is located in the processing area is provided, and the control unit is provided with the above-mentioned control unit. When the work clamp is located in the processing area, it is configured to be controllable so that the supply amount of the pressure oil to the upper hydraulic chamber is reduced.

As a fourth means, in addition to the subject matter of the third means, the carriage is provided on a carriage base movable in the y-axis direction with respect to the frame so as to be movable in the x-axis direction. The clamp detector includes an x-axis sensor that detects that the work clamp is positioned within the same x-axis range as the processing area, and the work clamp is positioned within the same y-axis range as the processing area. To detect
It is characterized in that an axis sensor is provided.

As a fifth means, the invention is characterized in that the upper hydraulic chamber and the lower hydraulic chamber are connected to a servo valve in addition to the invention-specifying matter of any one of the first to fourth means. And

According to the above-described invention, the upper turret and the lower turret are rotated to position a predetermined punch and a predetermined die in a processing area. Further, the carriage is moved in the horizontal direction in a state where the end of the plate is clamped by a plurality of work clamps (in the case where the invention specific items of the fourth means are provided, the carriage is moved to the carriage base. , And the carriage base is moved integrally with the carriage in the y-axis direction with respect to the frame) to position the plate at a predetermined position between the upper turret and the lower turret. Then, by supplying pressure oil to the upper hydraulic chamber, the striker is moved downward, and a predetermined punch is pressed downward to move downward with respect to the upper turret. by this,
A punching process can be performed on a plate material by cooperation of a predetermined punch and a predetermined die. Here, in the case where the invention is provided with the third means, when the plate is positioned at a predetermined position between the upper turret and the lower turret,
When the clamp detector detects that the work clamp is located in the processing area (in the case where the invention specific item of the fourth means is provided, the work clamp is located within the same x-axis range as the processing area by the x-axis sensor). Is detected, and when the y-axis sensor detects that the work clamp is located within the same y-axis range as the processing area), the supply amount of the pressurized oil to the upper hydraulic chamber is reduced. Then, the striker is moved downward at a low speed under the control of the control unit.

The process of punching a plate material will be described in detail. When the lower end of the predetermined punch abuts the upper surface of the plate material or the work clamp by the downward movement of the predetermined punch, the predetermined punch is moved upward. The reaction force in the direction acts, and the pressure of the pressure oil in the upper hydraulic chamber rapidly rises. At this time, the height position of the striker when the pressure of the hydraulic oil in the upper hydraulic chamber rapidly rises is detected by the height position detector, and when the pressure of the hydraulic oil in the upper hydraulic chamber rapidly rises based on this height position. The height interval between the predetermined punch and the predetermined die is calculated by the height interval calculation unit, and the calculated height interval is compared with the length of the thickness of one plate material by the determination unit. When it is determined that the height interval is substantially the same as the length of the thickness of one plate, it is known that the lower end of the predetermined punch has hit the upper surface of the one plate, and the upper hydraulic chamber is moved to the upper hydraulic chamber. Pressurized oil is further supplied, a predetermined punch is further moved downward, and a punching process is performed on the plate material. On the other hand, if the height interval is longer than the thickness of one plate, it can be seen that the lower end of the predetermined punch has hit the upper surface of the work clamp or the two or more plates that have overlapped. The supply of the pressure oil to the chamber is controlled to be stopped, so that the downward movement of the striker is stopped, or an alarm is generated when the invention has the second means.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

Referring to FIG. 3, a turret punch press 1 according to an embodiment of the present invention is based on a bridge-type main body frame 3, and the main body frame 3 is vertically (up and down in FIG. ) Is provided with an upper frame 5 and a lower frame 7 facing each other. Upper frame 5
Is provided with a rotatable upper turret 11 having a plurality of punches 9, and a lower frame 7 is provided with a rotatable lower turret 15 having a plurality of dies 13. The upper turret 11 and the lower turret 15 are vertically opposed to each other. In order to position the predetermined punch 9 and the predetermined die 13 in the processing area F, the turret servomotor (not shown) is driven in synchronization with the same direction. Can be rotated.

The lower turret 15 in the lower frame 7
A fixed table 17 for supporting the plate material W is provided on the front side (right side in FIG. 3) of the pair of movable tables 1 on the left and right (lower and upper sides in FIG. 3) of the fixed table 17.
Reference numerals 9 and 21 are provided so as to be movable in the front-rear direction (in other words, the y-axis direction).

A plate positioning device 2 for positioning the plate W at a predetermined position between the upper turret 11 and the lower turret 15
3 are provided. That is, the upper frame 5 is provided with a carriage base 25 extending in the left-right direction (in other words, the x-axis direction) and connected to the pair of movable tables 19, 21. The carriage base 25 is a y-axis servo motor. It moves in the y-axis direction by driving (not shown). The carriage base 25 is provided with a carriage 29 provided with a plurality of work clamps 27 for clamping the ends of the plate material W. The carriage 29 moves in the x-axis direction by driving an x-axis servo motor (not shown). Is what you do. In order to detect that the work clamp 27 is positioned within the same x-axis range as the processing area, an x-axis dog 31 is provided at an appropriate position in the carriage base 25 over the same x-axis range as the processing area F, On both left and right sides of each work clamp 27, an x-axis limit switch 33 operated by an x-axis dog 31 is provided.
The work clamp 27 is located within the same y-axis
Is located at an appropriate position on the lower frame 7 over the same y-axis range as the machining area.
5, and a y-axis limit switch 37 operated by the y-axis dog 35 is provided at an appropriate position of the carriage base 25.

Referring to FIG. 1, a striker 39 for pressing a predetermined punch 9 downward (downward in FIG. 1) is provided above the upper turret 11. It moves up and down by operation. The hydraulic cylinder 41 is provided at an appropriate position on the upper frame 5 and includes an upper hydraulic chamber 43 and a lower hydraulic chamber 45. The upper hydraulic chamber 43 includes a first circuit 47.
The lower hydraulic chamber 45 is connected to the A port of the servo valve 49 through the second circuit 51 via the servo valve 4.
9 is connected to the B port. The P port of the servo valve 49 is connected to the pump 55 via the third circuit 53, and the T port of the servo valve 49 is connected to the fourth circuit 5
It is connected to the tank 59 through 7. Here, a pressure sensor 61 that detects that the pressure in the upper hydraulic chamber 43 has risen sharply is provided in the middle of the first circuit 47.

At an appropriate position of the hydraulic cylinder 41, there is provided a height position detector 63 for detecting the height position of the striker 39. The height position detector 63 is a well-known technology and includes, for example, an operation transformer. Have.

A control means 65 as shown in FIG. 2 is provided for controlling the hydraulic cylinder 41 and the like. The control unit 65 includes a height interval calculation unit 67, a determination unit 69, a storage unit 71, and a control unit 73.
Axis limit switch 33, y-axis limit switch 37,
Pressure sensor 61, height position detector 63, servo valve 49,
Alarm generator 75 is connected. Here, the storage unit 65 stores the length of one plate material W, the height of the punch 9, and the like. Also, the height interval calculating section 67
The punch 9 and the die 13 at this time are based on the height position of the striker 39 when the pressure in the upper hydraulic chamber 43 rises sharply.
The determination unit 69 compares and determines the calculated height interval with the length of the plate thickness of one sheet material W. Further, the control unit 73 controls the servo valve so as to stop the supply of the pressurized oil to the upper hydraulic chamber 43 when it is determined that the calculated height interval is longer than the thickness of one plate material W. 49 or an alarm generator 75
Control to generate an alarm by
Axis limit switch 33 and y-axis limit switch 37
Is operated, the servo valve 49 is controlled so that the supply amount of the pressurized oil to the upper hydraulic chamber 43 is reduced, and various other controls are performed.

Next, the operation of the embodiment of the present invention will be described.

By driving the turret servomotor, the upper turret 11 and the lower turret 15 are rotated to position the predetermined punch 9 and the predetermined die 13 in the processing area F. The carriage 29 is moved in the x-axis direction with respect to the carriage base 25 by driving the x-axis servo motor in a state where the ends of the plate material W are clamped by the plurality of work clamps 27, and the y-axis servo By driving the motor, the carriage base 25 is moved integrally with the carriage 29 in the y-axis direction with respect to the main body frame 3 to position the plate material W at a predetermined position between the upper turret 11 and the lower turret 15. Then, by supplying pressure oil to the upper hydraulic chamber 43 of the hydraulic cylinder 41, the striker 39 is moved downward, and the predetermined punch 9 is pressed downward against the urging force of the lifter spring 9a. The upper turret 11 is moved downward. Thereby, punching of the plate material W can be performed by cooperation of the predetermined punch 9 and the predetermined die 13. here,
When the plate material W is positioned at a predetermined position between the upper turret 11 and the lower turret 15, the x-axis limit switch 33
As a result, it is detected that the appropriate work clamp 27 is located within the same x-axis range as the processing region F, and the appropriate work clamp 27 is located within the same y-axis range as the processing region F by the y-axis limit switch 37. When this is detected, the servo valve 49 is controlled by the control unit 73 so that the supply amount of the pressure oil to the upper hydraulic chamber 43 is reduced, and the striker 39 is moved downward at a low speed.

The process of punching the plate material W will be described in detail. When the lower end of the predetermined punch 9 abuts on the upper surface of the plate material W or the work clamp 27 due to the downward movement of the predetermined punch 9, An upward reaction force acts on the punch 9, and the pressure in the upper hydraulic chamber 43 sharply increases. Here, the height position of the striker 39 when the pressure in the upper hydraulic chamber 43 sharply increases is detected by the height position detector 63, and based on this height position, the predetermined position when the pressure in the upper hydraulic chamber 43 sharply increases. Punch 9 and predetermined die 13
Is calculated by the height interval calculation unit 67, and the calculated height interval and the length of the thickness of one plate material W are determined by the determination unit 6.
9 are compared. When the height interval is substantially the same as the length of one sheet material W, the predetermined punch 9
Is found to have hit the upper surface of one plate material W, the pressurized oil is further supplied to the upper hydraulic chamber 43, the predetermined punch 9 is further moved downward, and the plate material W is punched. Perform processing. On the other hand, when the height interval is longer than the plate thickness of one sheet material W, the lower end of the predetermined punch 9 has the work clamp 27 or the overlapping part 2 as shown in FIGS. It can be seen that the upper surface of the plate material W or more has been hit, and the control unit 69 controls the servo valve 49 so as to stop the supply of the pressure oil to the upper hydraulic chamber 43,
While stopping the downward movement of striker 39,
The controller 73 controls the alarm generator to generate an alarm.

As described above, according to the embodiment of the present invention, the lower end of the predetermined punch 9 is moved downward by the predetermined punch 9 so that the lower end of the predetermined punch 9 is overlapped with the work clamp 27.
Even when the punch 9 collides with the upper surface of the plate material W, the predetermined punch 9 does not move further downward, so that it is possible to avoid punching the work clamp 27 or to punch out two or more plate materials W which overlap. By avoiding this, the life of the mold (the punch 9 and the die 13) can be improved.

[0024]

As described above, according to any one of the first to fourth aspects of the present invention, the lower end of the predetermined punch is moved by the downward movement of the predetermined punch. The predetermined punch does not move further downward even if it hits the upper surface of the clamp or the overlapping two or more plate members, so that punching of the work clamp can be avoided or the two or more overlapping plate members can be removed. By avoiding punching, the life of the mold (punch, die) can be improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a main part of an embodiment of the present invention.

FIG. 2 is a control block diagram.

FIG. 3 is a plan view of a turret punch press.

FIG. 4 is an operation explanatory view.

[Explanation of symbols]

 Reference Signs List 1 turret punch press 3 main body frame 9 punch 11 upper turret 13 die 15 lower turret 25 carriage base 27 work clamp 29 carriage 33 x-axis limit switch 37 y-axis limit switch 39 striker 41 hydraulic cylinder 43 upper hydraulic chamber 45 lower hydraulic chamber 49 Servo valve 61 Pressure sensor 63 Height position detector 67 Height interval calculation unit 69 Judgment unit 73 Control unit

Claims (4)

[Claims] An upper turret provided with a plurality of punches and a lower turret provided with a plurality of dies are vertically opposed to each other,
The upper turret and the lower turret are configured to be rotatable in order to position a predetermined punch and a predetermined die in a processing area, and an end of the plate is clamped in order to position the plate in a predetermined position between the upper turret and the lower turret. A carriage provided with a plurality of work clamps to be moved is provided so as to be movable in the horizontal direction, a striker for pressing a predetermined punch downward is provided above the upper turret, and the striker is provided with an upper hydraulic chamber and a lower hydraulic chamber. It is configured to be movable in the vertical direction by the operation of a hydraulic cylinder, provided with a pressure sensor for detecting a sudden rise in the pressure of the upper hydraulic chamber, and provided with a height position detector for detecting the height position of the striker. The height interval between the punch and the die at this time is calculated based on the height position of the striker when the pressure in the chamber rises sharply. And a determining unit for comparing and judging the calculated height interval and the length of the plate thickness of one sheet material, wherein the calculated height interval is the length of the sheet thickness of one sheet material. A turret punch press, comprising: a control unit for controlling the supply of the pressurized oil to the upper hydraulic chamber to be stopped when it is determined to be longer than the predetermined length. 2. The control unit, when it is determined that the calculated height interval is longer than the thickness of one sheet material,
The turret punch press according to claim 1, wherein the turret punch press is configured to be controllable to generate an alarm. 3. A control device, comprising: a clamp detector for detecting that the work clamp is positioned in the processing area; and controlling the control unit when the work clamp is positioned in the processing area. 3. The turret punch press according to claim 1, wherein the turret punch press is configured to be controllable so that a supply amount of the turret is reduced. 4. 4. The method according to claim 1, wherein the carry is y for a frame.
An x-axis is provided on a carriage base movable in the axial direction so as to be movable in the x-axis direction, and the clamp detector detects that the work clamp is located in the same x-axis range as the machining area. The turret punch press according to claim 3, further comprising a sensor and a y-axis sensor for detecting that the work clamp is located within the same y-axis range as the processing area.