JPH11319986A - Punching method in punch press and punch press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a clamper and a die from being broken, and to enable the punching with the minimum stroke by saving the clamper from a die arrangement area when the clamper enters the die arrangement area, moving a work to be positioned at the next punching position, and then, punching the work. SOLUTION: A CPU drives a driving part based on a working program to carry a work W held by clampers 7 to the working position of a turret station 1. The work W is punched as desired by a die K provided at the working position. When the clamper 7 enters a die arrangement area K1, a limit switch 23 is brought into contact with an X-dog 25 and turned on, and a Y limit switch is brought into contact with a Y-dog 29 and the Y limit switch 27 is turned on, the CPU executes a program by a commanding means, and moves a carriage 9 in a separating direction from the turret station 1 to save the clampers 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a punching method and a punch press in a punch press, which prevents a clamper and a mold from being damaged in an overriding area and a dead zone area, and reduces the processing time by performing processing with a minimum stroke. The present invention relates to a punching method and a punch press in a punch press that can be achieved.

[0002]

2. Description of the Related Art For example, a turret punch press (NCT) is known as a plate material punching machine for performing a desired punching process on a plate material. Such a turret punch press conveys a work gripped by a clamper to a turret station where a mold is set by a carriage and a side table, and performs a desired punching process on the work by a mold arranged at a processing position. Is what you do.

A turret punch press of the so-called hydraulic press type, in which the ram can be raised and lowered by supplying hydraulic pressure, is configured so that the stroke of the ram can be freely adjusted. In order to increase the processing, processing is performed with the minimum stroke. However, in the override area or the dead zone area, there is a possibility that the clamper and the mold may interfere with each other.
The so-called top dead center punching is performed in which the ram is raised to the top dead center and punching is performed with full stoke.

[0004]

However, when the top dead center punching is performed, the ram is full-stoke, so that it takes a longer time to perform the punching than the normal minimum stroke.
In addition, a large stroke requires a large amount of oil, and accordingly, an electric motor (motor) that drives an accumulator and a pump for supplying oil increases. Further, the use of a large amount of oil leads to deterioration of the oil.

Accordingly, the present invention prevents breakage of the clamper and the mold in the override region and the dead zone region, and also performs punching with a normal minimum stroke in these regions to greatly reduce the processing time. An object of the present invention is to provide a punching method and a punch press in a punch press that can achieve energy saving by reducing the size of an accumulator and an electric motor.

[0006]

According to the present invention, when a clamper for gripping a workpiece enters a mold placement area arranged at a processing position of a mold mounting station on which a mold is mounted, the clamper is provided. Is retracted from the mold arrangement area, and after moving and positioning the work to the next processing position,
The above problem is solved by punching the work.

As described above, when the clamper enters the mold placement area, the clamper is evacuated from the mold placement area.
There is no damage to the mold. Further, since there is no need to make the ram full stroke, machining with a minimum stroke is sufficient, and machining time can be reduced.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.
In this embodiment, the present invention is applied to an NC turret punch press (NCT) of a hydraulic press type.

<Structure of Turret Punch Press> First, the turret punch press of the present embodiment will be described. As shown in FIG. 1, the turret punch press of the present embodiment is provided with a turret station 1 which is a mold mounting station on which a plurality of molds K are mounted, a fixed table 3 provided at the center, and both sides thereof. A work table including side tables 5 and 5, a carriage 9 having a pair of clampers 7 and 7 for gripping the work W, and a carriage base 11 that allows the carriage 9 to move freely.

As shown in FIG. 1, the turret station 1 has a lower turret and an upper turret on which a plurality of types of dies K each comprising a punch and a die are arranged, and is rotated by a turret drive motor (not shown). It has been done. Each of the upper turret and the lower turret is formed as a disk having a size sufficient to arrange the mold K along the circumferential direction. A plurality of dies (not shown) are arranged on the lower turret, and a plurality of punches are arranged on the upper turret.

The work table comprises a fixed table 3 and side tables 5, 5 provided on both sides of the fixed table 3. The fixed table 3 is fixed at a position facing the turret station 1.
The side tables 5, 5 are provided on both sides of the fixed table 3, respectively, and are slidable along LM guide rails 13, 13 fixed on a frame (not shown).

The carriage base 11 is fixed on one side edge of the pair of side tables 5, 5, and is moved by a Y-axis ball screw 15 and a Y-axis drive motor 17 in the direction of the arrow Y-axis in FIG. It moves together with the tables 5 and 5.

The carriage 9 is provided movably with respect to the carriage base 11, and has an X-axis ball screw 19.
1 and an X-axis drive motor 21 so as to be movable in an arrow X direction (a direction orthogonal to the Y-axis direction) in FIG.
The carriage 9 is provided with a pair of clampers 7 for holding and holding the work W.

In the turret punch press according to the present embodiment, the clampers 7, 7
Has been detected in the mold arrangement area K1 which is the arrangement area of the mold K arranged at the processing position. Such detection means includes an X limit switch 23 and an X dog 25 for detecting the position of the clampers 7 and 7 in the X axis direction, a Y limit switch 27 and a Y dog 29 for detecting the positions of the clampers 7 and 7 in the Y axis direction. Consists of

In FIGS. 1 and 4, the mold arrangement area K
Although 1 is shown as a circular area, this is for clarity of explanation, and the size and shape of the area actually vary depending on the size of the mold and the like.

The X limit switches 23 are attached to both width ends of the clampers 7 and 7, respectively, so that the position can be detected regardless of the width direction of the clampers 7 and 7 from the mold placement area K1. Has been made. The X dog 25 comes into contact with the X limit switch 23 to turn on the X limit switch 23, and is provided on the carriage base 11. The position of the X dog 25 is determined by the X position where the X limit switch 23 is provided.
It is on the extension line in the axial direction and on the extension line in the Y-axis direction that faces the mold arrangement area K1 at the processing position.

The Y limit switch 27 is provided with a support bracket 31 provided on the lower surface of one of the side tables 5.
The clampers 7 are arranged on the extension line in the X-axis direction at the tip positions of the clampers 7 and 7. In other words, the Y limit switch 27 is provided at the same position as the tip positions of the clampers 7, 7 in the X-axis direction. The support bracket 31 is provided on the lower surface of the side table 5 and runs along the LM guide rail 13. The Y dog 29 is fixed on a lower frame (not shown), and is provided on an extension line in the X-axis direction of the die arrangement region K1 at a processing position.

In the turret punch press according to the present embodiment, when the detecting means detects that the clampers 7, 7 have entered the mold placement area K1, the clampers 7, 7 are moved to the mold placement area K1. Command means 33 for instructing the workpiece W to be moved to the next position to be processed next.

The command means 33 is provided in the control unit 35 shown in FIG. The command means 33 is provided by the CPU 41 based on the machining program 39 inputted by the program input means 37, by the turret station 1, the side tables 5, 5, the carriage 9, and the carriage base 11.
When the driving unit 43 is driven to perform a desired punching process on the workpiece W, when the clampers 7, 7 enter the mold disposition area K1, it is detected that they have entered, and This is a program for instructing the clampers 7, 7 to retreat from the mold arrangement area K1.

In this program, data such as the shape and size of the turret station 1 and the mold K and the like are input, and the size and shape of the mold placement area K1 determined by these data are input. .

<Punching Operation> Next, a punching method in the turret punch press configured as described above will be described.

The CPU 41 drives the drive unit 43 based on the processing program 39, and conveys the work W gripped by the clampers 7, 7 to the processing position of the turret station 1. Then, a desired punching process is performed on the workpiece W by the mold K provided at the processing position. During the punching process, when the clampers 7, 7 enter the mold arrangement area K1, the X limit switch 23 comes into contact with the X dog 25, the X limit switch 23 is turned on, and the Y limit switch 23 is connected to the Y dog 29. 27 comes into contact, the Y limit switch 27 is turned on, and the CPU 41 executes the program by the command means 33.

FIG. 3 shows the operation according to the program.
Will be described with reference to a conceptual diagram showing the relative positional relationship of FIG. Note that a range indicated by an arrow C in FIG. 3 represents an override region and a dead zone region.

First, a description will be given with reference to a conceptual diagram showing a relative positional relationship shown in FIG. 3. After punching a processing position A where a work W is present, the carriage 9 is moved in the X-axis direction as shown by an arrow a. X dog 2 provided in mold arrangement area K1
5 contacts the X limit switch 23, and the X limit switch 23 is turned on. At this time, the Y limit switch 27 also comes into contact with the Y dog 29, and the Y limit switch 27 is similarly turned on.

When both the X limit switch 23 and the Y limit switch 27 are turned on, the carriage 9 is moved in a direction away from the turret station 1 as indicated by an arrow B, and the clampers 7, 7 are retracted from the mold arrangement area K1. .

Next, the carriage 9 is moved in the X-axis direction as shown by the arrow C to move the work W to the next processing position. Then, after moving the side tables 5 and 5 in the Y-axis direction as shown by the arrow D, the processing position B of the work W is processed by the mold K disposed at the processing position.

Next, the actual operation will be described. A punching process is performed on the workpiece W based on the processing program 39, and at the time of the punching process, the clamper 7 is moved from the position shown in FIG. 4A outside the mold arrangement region K1 to the position shown in FIG. When entering the mold disposition area K1, the X limit switch 23 contacts the X dog 25 to turn on the X limit switch 23, and the Y limit switch 27 contacts the Y dog 29 so that the Y limit switch 27 Turn on.

When both the X limit switch 23 and the Y limit switch 27 are turned on, the CPU 41 executes the program by the command means 33, and moves the side tables 5, 5 to the turret station as shown by the arrow D in FIG. The workpiece W is moved in a direction away from 1 (the direction of the origin position of the work W). That is, the clamper 7 is moved to the mold placement area K1.
Evacuate from The moving amount at this time is a minimum moving amount determined according to the sizes of the turret station 1 and the mold K, and the moving amount is managed by a macro. Such a minimum movement amount is a movement amount predetermined by the command means 33.

Next, as shown in FIG. 4C, the carriage 9 is moved in the X-axis direction indicated by the arrow E in the same figure, and the work W is moved to the next position to be processed. And FIG.
As shown in (d), the side tables 5, 5 are moved in the direction approaching the turret station 1 indicated by an arrow F in FIG. Perform punching.

As described above, when the clampers 7, 7 enter the mold arrangement area K1, the clampers 7, 7 are retracted from the mold arrangement area K1, and the work W is moved to the next processing position. Since the workpiece W is punched after the movement and positioning, the clampers 7 are not erroneously punched. Further, not only the clampers 7 and 7 but also the mold K are not damaged.

When punching is performed in the override area and the dead zone area, the clampers 7, 7 holding one of these areas are removed, and another area is clamped again, and then the area is punched. To do. In this way, it is not necessary to strike the top dead center by full-stoke of the ram, and the work W can be machined by punching with a minimum stroke. Therefore, the processing time can be shortened, and the accumulator and the electric motor can be small, because a large amount of oil is not required.
Energy saving can be realized.

As described above, a specific embodiment to which the present invention is applied has been described. However, the present invention can be variously modified without being limited to the above-described embodiment.

For example, in the above-described embodiment, the present invention is applied to a turret punch press of a hydraulic press type, but the same effect can be obtained by applying the present invention to a turret punch press of a mechanical press type. The same effect can be obtained by applying the present invention to a punch press in which a mold is mounted on a fixed mold mounting station.

In the case of the turret punch press of the mechanical press type, the punching stroke is constant, so there is no relation to energy saving. However, since the clampers 7, 7 pass over the die, the clampers 7, 7 and the die may be damaged. Also, in this mechanical press type turret punch press, similar effects can be obtained by retracting and moving the clampers 7, 7 from the mold arrangement area K1 as in the above-described embodiment.

[0035]

The present invention is embodied in the form described above and has the following effects.

According to the present invention, when the clamper enters the mold arrangement area, the clamper is retracted from the mold arrangement area, and after moving and positioning the work to the next processing position, the work is removed. Since the punching is performed, the clamper and the mold are not damaged, and the workpiece can be punched with a minimum stroke in the override region and the dead zone region. As described above, according to the present invention, since machining can be performed with a minimum stroke, machining time can be reduced, and
The size of the accumulator and the electric motor can be reduced, and energy saving and running cost reduction can be realized.

[Brief description of the drawings]

FIG. 1 is a plan view of a turret punch press of the present embodiment.

FIG. 2 is a block diagram showing a control unit in the turret punch press of the present embodiment.

FIG. 3 is a conceptual diagram showing, as a relative positional relationship, a series of operations for retracting the clamper from the mold placement area when the clamper enters the mold placement area.

FIG. 4 is an actual operation explanatory view showing a series of operations for retracting the clamper from the mold arrangement area when the clamper enters the mold arrangement area.

[Description of Signs] 1 Turret station 3 Fixed table 5 Side table 7 Clamper 9 Carriage 11 Carriage base 23 X limit switch 25 X dog 27 Y limit switch 29 Y dog 33 Command means

Claims (3)

[Claims] 1. A punching method in a punch press, wherein a workpiece gripped by a clamper is moved to a processing position of a mold mounting station on which a plurality of dies are mounted, and the workpiece is punched by the dies. When entering into the arrangement area of the mold arranged at the processing position, the clamper is evacuated from the mold arrangement area, and after moving and positioning the work to the next processing position, the work is removed. A punching method in a punch press, wherein the punching is performed. 2. A mold mounting station on which a plurality of dies are mounted, a work table supporting a work, a carriage having a clamper for gripping the work, and a direction approaching or separating from a processing position. A carriage base that is movable and the carriage is movably mounted in a direction substantially perpendicular to the moving direction; and a detection that detects that the clamper has entered a mold arrangement area arranged at the processing position. Means, when it is detected that the clamper has entered the mold arrangement area, retracts the clamper from the mold arrangement area to move and position the work to a position to be processed next. A punch press comprising command means for commanding. 3. The detecting means detects an X limit switch, an X dog for turning on the X limit switch, and a position in the Y axis direction of the clamper, for detecting a position of the clamper in the X axis direction. Y limit switch and Y for turning on this Y limit switch
The punch press according to claim 2, comprising a dog.