JP3160019B2 - Press working method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press working method, and more particularly to a press working method for performing press working using a press die having a directional shape such as a long angle, a long circle, and the like. .

[0002]

2. Description of the Related Art In the case of performing press working using a mold having a directionality such as a long angle, a long circle and the like, that is, a shape mold, in addition to the dimensions of the mold, the direction of the shape of the mold is not limited. Therefore, it is necessary to set the direction of the press die according to the punching angle. For this reason, conventionally, the shape mold is provided with a key for setting the mounting angle, and even if the shape and dimensions of the mold are the same, the key setting angle is set to, for example, 10 degrees according to the punching angle. , 30 degrees, which are different from each other.

[0003] This leads to an increase in the required number of press dies and an increase in the frequency of die exchange.

In order to cope with this, for example, in a turret punch press, a disk-shaped tool holder is provided rotatably around its own central axis at one circular mold mounting station of a turret disk. The tool holder can be driven to rotate at an arbitrary rotation angle with respect to the turret disk by the rotation driving means, and the direction of the press die mounted on the tool holder can be freely changed by controlling the rotation angle. Incorporation of a mold auto-index mechanism has been performed.

In this method, the shape mold is set in an arbitrary direction on a turret disk by controlling the rotation angle of a tool holder by a mold automatic index mechanism.
Pressing at an arbitrary punching angle can be performed by one shape die without requiring a plurality of types of shape dies for key setting angles.

In addition, a plurality of press dies are mounted on a single disk-shaped tool holder around the center of rotation thereof, and the tool holder, ie, a multi-tool holder (pot) is mounted on a die on which a die auto-index mechanism operates. It is loaded into the mounting station and one of the multiple press dies mounted on this multi-tool holder is selectively moved to the position directly below the striker by controlling the rotation angle of the multi-tool holder by the die auto index mechanism. And the rotation of the multi-tool holder only, not the rotation of the turret disc,
It has already been proposed to change the mold used.

In this case, the number of press dies that can hold one turret disk increases, and the change of the dies used is performed at a higher speed than when the turret disk is rotated.

[0008]

When the multi-tool holder is loaded into the mold mounting station corresponding to the mold automatic index mechanism, the above-mentioned advantages can be obtained.
However, in this case, even if the multi-tool holder is rotationally displaced by the mold auto-index mechanism, only the press mold located immediately below the striker is selected, and the press mold itself rotates around its own central axis. That is, since it does not rotate, the direction of the press die cannot be changed.

In this multi-tool holder, in order to change the direction of the press die to change the punching angle, the press die is rotationally displaced (rotated) around its own central axis with respect to the multi-tool holder. As described above, it is necessary to provide a mold rotation drive mechanism equivalent to the mold automatic index mechanism in the multi-tool holder. Since the multi-tool holder is to be loaded into one mold mounting station of the turret disk, it is not so large, and it is difficult to incorporate a mold rotation drive mechanism into the multi-tool holder in terms of space. Even if the mold rotation drive mechanism is incorporated in the multi-tool holder, the limitation is that only one press mold attached to the multi-tool holder can be rotationally driven.

The present invention has been made in view of the above-mentioned problems in the conventional press working. The direction of the press die mounted on a multi-tool holder or the like is determined by pressing the tool holder itself. Can be changed arbitrarily to change the punching angle without incorporating a special mold rotation mechanism that rotates the mold, and all the multiple press dies mounted on the multi-tool holder etc. can be reoriented To provide a press processing method that can be a press die, and that can be easily performed in a directional press process using a shape die having a shape of a rectangle such as a rectangle, a rectangle, or the like. The purpose is.

[0011]

SUMMARY OF THE INVENTION According to the present invention, at least one press die is provided on a rotatably provided tool holder at a position radially offset from the center of rotation of the tool holder. Attached, the striker is provided so as to be displaceable in the direction of movement of the press die by rotation of the tool holder, and the direction of the press die is changed by controlling the rotation angle of the tool holder, and the striker is controlled in accordance with this rotation angle control Controlling the amount of displacement of the striker, moving the striker to a position corresponding to the press mold whose direction has been changed, and pressing the press mold with the striker, and performing press working at an arbitrary punching angle. Is achieved by a press working method.

[0012]

According to the press working method of the present invention, the rotational displacement of the tool holder causes the press die mounted thereon to revolve around the center of rotation of the tool holder, whereby the direction of the press die is changed by the tool. It changes according to the rotation angle of the holder. Then, the striker moves to a position where it presses the press die, the orientation of which has been changed by the rotational displacement of the tool holder, and presses it.

[0013]

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

FIG. 6 shows an example of a turret punch press used for carrying out the press working method according to the present invention.
The turret punch press 1 has an upper turret disk 5 at the upper part of the frame 3 and a lower turret disk 7 at the lower part of the frame 3. Upper turret disk 5
The lower turret disk 7 and the lower turret disk 7 are indexed and rotationally driven in synchronization with each other by driving means (not shown), and a plurality of die holding stations corresponding to the index number are used for punch press dies. And a die 11 are held. The punch 9 of the upper turret disk 5 is pressed by a striker 13 driven by cranking or hydraulic pressure at a punching position, and performs punching in cooperation with a die 11 at an opposing position.

The frame 3 is provided with a side table 15 movable horizontally in the left-right direction (Y-axis direction) in FIG. The side table 15 has a carriage base 17 extending in a direction (X-axis direction) perpendicularly penetrating the plane of FIG.
Is fixedly connected to the carriage base 17 as shown in FIG.
Carriage 1 so that it can move in a direction that penetrates the paper at right angles.
9 are attached. A work clamp 21 is attached to the carriage 19, and the work clamp 21 is configured to detachably hold a plate material (work) (not shown).

The plate material to be processed gripped by the work clamp 21 is moved by the movement of the carriage base 17 in the Y-axis direction and the movement of the carriage 19 in the X-axis direction.
Is moved in a plane along the Y-axis direction and the X-axis direction along a pass line with reference to the upper surface of the punch, and positioning with respect to the punch operation position is performed.

As shown in FIG. 3, the upper turret disk 5 and the lower turret disk 7 are provided with a mold auto-index mechanism 23. The mold auto-index mechanism 23 is a disk-shaped tool holder that is rotatably loaded around a central axis of the mold holding station hole 25 in a circular shape. In the present invention, a plurality of punches are provided. Multi-tool holder 2 with 9 and die 11
A worm 31 and a worm shaft 33 that mesh with a worm wheel 29 provided on an outer peripheral portion of the worm 7 (see FIG. 4);
A drive shaft 35 provided on the frame 3 side, an electric motor 37 for driving the drive shaft 35 to rotate, and a belt-type transmission mechanism 39
And a clutch 41 for selectively driving and connecting the drive shaft 35 and the worm shaft 33. The drive shaft 35 and the worm shaft 33 are drive-connected by the clutch 41, and the drive shaft 35 and the worm shaft 33 are driven by the electric motor 37. When the worm 31 is driven to rotate, the multi-tool holder 27 is integrally formed with the worm wheel 29 so that the mold holding station hole 25 is formed.
In this state, the upper turret disk 5 or the lower turret disk 7 is rotationally displaced at a predetermined rotation angle around the center axis of the disk.

Although only the upper turret disk 5 side is shown in FIG. 3, the mold auto-index mechanism 23 is provided equivalently by the upper turret disk 5 and the lower turret disk 7. The mold auto-index mechanism 23 may be substantially the same as the conventional one including its synchronous drive system.

As shown in FIG. 3, a positioning lock member 43 is attached to the upper turret disk 5 and the lower turret disk 7 at predetermined index rotation positions. A shot pin hole 45 is formed in the positioning lock member 43, and a shot pin 49 driven forward and backward by a fluid pressure cylinder device 47 provided on the frame 3 side is provided in the shot pin hole 45. The turret disk 7 is selectively fitted for positioning of the index rotation position. FIG. 3 also shows only the upper turret disk 5 side of this shot pin mechanism, but these are provided equivalently by the upper turret disk 5 and the lower turret disk 7 and are synchronously driven with each other. The shot pin mechanism may be substantially the same as the conventional one including its synchronous drive system.

As shown in FIGS. 3 and 4, each of the upper turret disk 5 and the lower turret disk 7 has a mold holding station hole 25 corresponding to a mold auto index.
Each of the multi-tool holders 27 loaded on the punches 9 and the die 11 on the circumference of a radius R centered on its own central axis.
In the embodiment shown in the figure, five are mounted at equal intervals, and these five sets of punch press dies are individually pressed to perform individual punch presses. ing. At least one of the five punch press dies is a shape die, and in this embodiment, the punch press die has a long round shape.

As shown in FIGS. 4 and 5, the striker 13 is connected to the ram 53 via a striker moving mechanism 51. The striker moving mechanism 51 has a rotary cylindrical body 57 rotatably supported by the bearing 55 around the center axis of the ram 53 from the frame 3, and a ram bottom plate 59 can move up and down in the rotary cylindrical body 57. Is inscribed in The ram bottom plate 59 is rotatably connected to the ram 53 by a bearing 61, is driven to descend by the ram 53, and is engaged with the rotating cylindrical body 57 by a sliding key 63. The ram bottom plate 59 is urged upward by a compression coil spring 65.

A timing belt wheel 57a is provided on the outer periphery of the rotary cylindrical body 57. Timing belt car 5
An endless timing belt 73 is stretched between 7a and a timing belt wheel 71 fixed to a rotating shaft 69 of a striker rotating electric motor 67 attached to the frame 3, and the rotating tubular body 57 is rotated by the striker. Electric motor 67
Thus, it is driven to rotate at an arbitrary rotation angle about its own central axis.

A striker holder 75 is fixed to the lower bottom portion of the ram bottom plate 59. A linear guide 77 extending in the radial direction of the ram 53 is formed at the lower bottom of the striker holder 75, and the linear guide 77 is provided with a slider 79 having the striker 13 fixed to the lower bottom at the linear guide. 77
Are slidably engaged with each other in the extending direction. A hydraulic cylinder device 81 attached to a striker holder 75 is drivingly connected to the slider 79. The hydraulic cylinder device 81 moves the slider 79 in the extending direction of the linear guide portion 77, in other words, in the radial direction of the ram 53. Reciprocating drive. The reciprocating stroke of the slider 79 is determined in accordance with at least the distance from the center of the ram to a position on the circumference of the radius R of the multi-tool holder 27 which is aligned with the punch 9.

FIG. 1 shows an example of a control system for implementing a press working method according to the present invention using a turret punch press having the above-described configuration. This control system is constituted by a CNC, and receives an NC program and sequentially executes the NC program. The NC program execution unit 83 and the information of the punch press dies mounted on the upper turret disk 5 and the lower turret disk 7 are stored in the control system. And a stored mold information storage unit 85.

The NC program execution unit 83 executes the executed N
The turret disk rotation amount calculation unit 87, the die auto index rotation angle calculation unit 89, the striker radial direction movement amount calculation unit 91, and the striker rotation angle Arithmetic unit 93
And the XY coordinate position calculation unit 95 of the work.

The die information storage unit 85 stores information on the punch press dies mounted on the upper turret disk 5 and the lower turret disk 7 as information on the punch press dies loaded in each die holding station of the turret disk. The shape, the dimension, and the key angle (information on the direction of the mold) are stored. Further, as described above, the mold information storage unit 85 stores the mold holding station hole 2 corresponding to the mold auto index.
When the multi-tool holder 27 is loaded in 5,
This, information on the arrangement radius R of the punch press die in the multi-tool holder 27, the number of the die holding stations in the multi-tool holder 27, and the number of the die holding stations in the multi-tool holder 27 It stores the shape, dimensions, and key angles (information on the orientation of the die) of the loaded punch press die.

The turret disk rotation amount calculator 87 calculates N
Based on the required mold information from the C program execution unit 83 and the mold information from the mold information storage unit 85, the upper turret is used so that the punch press mold required for the next press working is located at the punch operation position. The index rotation positions of the disk 5 and the lower turret disk 7 are calculated, and turret disk rotation amount information based on this is output to the turret disk drive unit 97.

Die auto index rotation angle calculation unit 89
Is based on the necessary mold information and positioning information from the NC program execution unit 83 and the mold information from the mold information storage unit 85, and the punch press mold required for the next press working is compatible with the mold auto index. Multi tool holder 27
When the multi-tool holder 27 is loaded, the die auto index rotation angle is calculated so that the punch press die of the multi-tool holder 27 is positioned at the punch operation position, and the information based on this is used to drive the die auto index rotation. The data is output to the unit 99. The mold auto-index rotation drive unit 99 corresponds to the electric motor 37 in the illustrated embodiment.

The striker radial movement amount calculator 91 calculates N
Based on the required mold information from the C program execution unit 83 and the mold information from the mold information storage unit 85, the striker 13 is located at a radial position that can correspond to the punch press mold required for the next press working. In such a manner, the amount of movement of the striker 13 in the radial direction is calculated, and information based on the calculated amount is output to the striker radial movement drive unit 101. still,
The striker radial movement drive unit 101 corresponds to the fluid pressure cylinder device 81 in the illustrated embodiment.

The striker rotation angle calculation unit 93 is a punch press required for the next press working based on the necessary mold information and positioning information from the NC program execution unit 83 and the mold information from the mold information storage unit 85. When the mold is loaded in the multi-tool holder 27 corresponding to the mold auto index, the striker rotation angle is calculated so that the striker 13 is positioned in the punch press mold, and information based on the striker rotation angle is calculated. The data is output to the driving unit 103. Note that the striker rotation drive unit 103 corresponds to the striker rotation electric motor 67 in the illustrated embodiment.

The XY coordinate position calculating section 95 of the work
The X-axis coordinate position and the Y-axis coordinate position of the work are calculated based on the necessary mold information and the positioning information from the program execution unit 83 so that the work is located at the press working position necessary for the next press working. A drive signal based on this is output to the X-axis servomotor 105 and the Y-axis servomotor 107. In this case, the X-axis servo motor 10
Numeral 5 drives the carriage 19 in the X-axis direction.
The Y-axis servo motor 107 drives the carriage base 17 and the side table 15 in the Y-axis direction.
Note that the XY coordinate position calculation unit 95 may also receive mold information from the mold information storage unit 85 as needed.

Next, as a specific example of the working method of the press working method according to the present invention, as shown in FIG. 2, a mold holding station hole 25 corresponding to a mold auto index.
And a multi-tool holder 27 equipped with five punch press dies at equal intervals on a circle having an arrangement radius R,
In a position where a punch press die P having a shape of a long circle and a dimension of, for example, 10 × 20 is loaded at the fourth position, the work W is positioned at a coordinate position of (110, 50). A case in which a 10 × 20 oval is pressed by tilting θ degrees will be described.

In this case, the following NC program is executed. G90 X110 Y50 T10 Cθ By executing this NC program, first, T10, ie, 1
It is searched from the mold information that the 0x20 oval punch press mold P exists at the fourth position of the multi-tool holder 27 loaded in the mold holding station hole 25 corresponding to the mold auto index. As a result, the upper turret disk 5 and the lower turret disk 7 are driven by the turret disk drive 97 to the indexing rotation position so that the multi-tool holder 27 is located at the pressing position, and the rotation of the multi-tool holder 27 by this indexing rotation. It is aligned with the axis of the ram 53.

Next, the striker 13 together with the slider 79 and the ram 53, in other words, the ram 53, by the hydraulic cylinder device 81 which is the striker radial direction moving drive unit 101 in accordance with the arrangement radius R of the punch press die in the multi-tool holder 27. Then, the multi-tool holder 27 is moved by R in the radial direction. As a result, the striker 13 is located at a position matching the arrangement circumference of the punch press die in the multi-tool holder 27.

Further, the striker rotation drive unit 1 is instructed to press the 10 × 20 oval by tilting θ degrees and press working.
The rotating tubular body 57 is rotated by θ degrees by the striker rotating electric motor 67 which is 03. This makes striker 13
Ram 53 with striker holder 75 and holder 79
Is rotated by θ degrees around the central axis of

Next, in order to select the fourth position (n) of the multi-tool holder 27, the multi-tool holder 27 is moved to {2π (6-
n) Rotate (rotate) by 5 ／ + θ.

Thus, the multi-tool holder 27 4
The position of the 10 × 20 oval punch press die P at the number position has a radius R around the rotation axis of the multi-tool holder 27.
Is rotated (revolved) by θ degrees on the circumference of the circle, and accordingly, the direction of the punch press die P changes by θ degrees. At this time, since the striker 13 also moves in the radial direction and is rotationally displaced as described above, the axes of the striker 13 and the punch press die P are aligned with each other.

Next, in order to press the work W to the (20, 30) coordinate position, the XY coordinate position is calculated according to the following equation.

X = 110 + Rsin θ y = 50 + Rcos θ As a result, the X-axis servo motor 105 is set to x = 110 + R
driven in accordance with sin θ, and the Y-axis servo motor 10
7 is driven in accordance with y = 50 + Rcos θ, whereby the carriage 19 moves in the X-axis direction, the carriage base 17 and the side table 15 move in the Y-axis direction, and the work W held by the work clamp 21 is moved. Positioning is performed.

In the above description, each operation and movement of each unit are performed in order. However, in practice, each operation may be performed in order or the movement of each unit may be performed simultaneously.

In the above embodiment, each operation is internally processed by the CNC of the turret punch press. However, each operation described above is performed by an automatic programming device or off-line externally. It is also possible to perform it in advance and pass it to the CNC of the turret punch press as a machining program.

Although the present invention has been described in detail with reference to specific embodiments, the present invention is not limited to these embodiments, and various embodiments can be made within the scope of the present invention. Some will be apparent to those skilled in the art.

[0043]

As will be understood from the above description, according to the press working method of the present invention, the press die mounted thereon revolves around the rotation center of the tool holder due to the rotational displacement of the tool holder. Because of this, the direction of the press die changes according to the rotation angle of the tool holder, and the striker moves to a position where the press die whose direction has been changed by the rotational displacement of the tool holder is pressed and pressed. The direction of the press die mounted on the multi-tool holder or the like can be arbitrarily changed for changing the punching angle without incorporating a special die rotation mechanism for rotating the press die in the tool holder itself. And the direction can be changed for all of the multiple press dies mounted on the multi-tool holder etc. and the command angle can be commanded. The number of types increases.

As a result, it is possible to perform directional press working using a shape mold having a mold shape such as a long angle, a long circle, etc., by using a small number of press dies and increasing the frequency of replacement of the mounting dies. Without the need for complicated press equipment.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a control system for performing a press working method according to the present invention using a turret punch press.

FIG. 2 is an explanatory diagram for explaining an example of a specific embodiment of a press working method according to the present invention.

FIG. 3 is a plan view of a mold auto-index mechanism of a turret punch press used for carrying out the press working method according to the present invention.

FIG. 4 is a longitudinal sectional view of a striker moving mechanism portion of a turret punch press used for carrying out the press working method according to the present invention.

FIG. 5 is a schematic perspective view of a striker moving mechanism portion of a turret punch press used for carrying out the press working method according to the present invention.

FIG. 6 is a front view showing an example of a turret punch press used for carrying out the press working method according to the present invention.

[Explanation of symbols]

 Reference Signs List 3 frame 5 upper turret disk 7 lower turret disk 9 punch 11 die 13 striker 21 work clamp 23 mold auto-index mechanism 27 multi-tool holder 37 electric motor 51 striker moving mechanism 53 ram 59 bottom plate 67 electric motor for striker rotation 75 striker holder 79 slider 81 Solid Fluid Pressure Cylinder Device 83 NC Program Execution Unit 85 Die Information Storage Unit 87 Turret Disk Rotation Amount Operation Unit 89 Die Auto Index Rotation Angle Operation Unit 91 Striker Radial Movement Amount Operation Unit 93 Striker Rotation Angle Operation Unit 95 Work XY coordinate position calculation unit 97 Turret disk drive unit 99 Die auto-index rotation drive unit 101 Striker radial direction movement drive unit 103 Striker rotation drive unit 105 X-axis servo motor 1 07 Y-axis servo motor

Continuation of the front page (56) References JP-A-3-8524 (JP, A) JP-A-2-274329 (JP, A) JP-A-2-137624 (JP, A) JP-A-1-215415 (JP) JP-A-3-66425 (JP, A) JP-A-2-137625 (JP, A) JP-A-3-24325 (JP, U) JP-A-3-24324 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B21D 28/00 B21D 28/24 B21D 28/34-28/36

Claims (1)

(57) [Claims] At least one press die is mounted on a rotatably provided tool holder at a position radially deviated from a rotation center of the tool holder, and a striker is rotated by rotation of the tool holder. Displaceably provided in the movement direction, changing the direction of the press die by controlling the rotation angle of the tool holder, controlling the displacement amount of the striker according to the rotation angle control, and changing the direction of the striker. A press working method characterized by moving to a position corresponding to a press mold, pressing the press mold with a striker, and performing press working at an arbitrary punching angle.