JPH08281340A - Method and device for marking in punch press - Google Patents

Abstract

PURPOSE: To make it possible to mark free characters and patterns on a surface or a rear face of a work. CONSTITUTION: By using a punch press working a work in cooperation with an upper die 7 and a lower die 3, a blade tip 67 for marking, which is provided on the upper die 7 or the lower die 3, is pressed against the surface or the rear face of the work. Simultaneously making the blade tip 67 vibrate, by moving the work in an X axis direction and a Y axis direction, arbitrary diagrams, characters, etc., are graved on the work. To perform this operation, a fluid pressure cylinder 35 lowering a punch body 61 on which the blade tip 67 for marking is provided at its tip, is provided, and a vibrator 81 vibrating the punch body 61 and the blade tip 67 is provided in the inside of the punch body 61. Otherwise, an exciter vibrating a punch body and the blade tip 67 is provided separately. Otherwise, a blade tip is provided on the lower die, and when marking by vibrating the upper die, the rear surface of the work can be marked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a marking method and a marking device in a punch press, and more particularly to a marking method and a marking method in a punch press capable of marking arbitrary diagrams or characters on the upper surface or the lower surface of a work. It relates to the device.

[0002]

2. Description of the Related Art Conventionally, a die for engraving a character or pattern on a work has a punch body with an embossed character or pattern on the tip, and the work is engraved by coining. It was

[0003]

However, in such a conventional technique, since the letters and patterns engraved on the tip of the punch body are made into one die, only these letters and the like can be engraved. There is a problem that it is not possible to engrave such characters.

Further, since the work is engraved by coining, the pressing force needs to be adjusted depending on the state of characters and patterns and the material and plate thickness of the work, which is troublesome.

The object of the present invention was made in view of the above-mentioned conventional techniques, and a marking method and marking in a punch press capable of marking free characters or patterns on the front surface or the back surface of a work. To provide a device.

[0006]

In order to achieve the above object, the stamping method in a punch press of the invention according to claim 1 is a punch press for working a work by cooperation of an upper die and a lower die. By pressing the cutting edge provided on the upper die or the lower die against the upper surface or the lower surface of the work, and vibrating the blade edge or the work, the work is moved in the X-axis direction and the Y-axis direction at the same time. It is characterized by engraving diagrams and characters on the work.

The stamping device in the punch press of the invention according to claim 2 is a punch press for moving and positioning the gripped work in the X-axis direction and the Y-axis direction and processing the work by cooperation of the upper die and the lower die. The upper die is detachably attached to an upper die holder that holds the upper die, a punch body vertically movable inside the guide, and a lower end portion of the punch body at the lower end portion of the punch body. A blade edge provided for engraving a workpiece placed on the lower die, a vibrator provided inside the punch body for finely vibrating the punch body and the blade edge up and down, and for pressing the punch body against the workpiece. And a fluid pressure cylinder for lowering the fluid pressure cylinder.

The stamping device in the punch press of the invention according to claim 3 is a punch press for moving and positioning a gripped work in the X-axis direction and the Y-axis direction and processing the work by cooperation of the upper die and the lower die. The upper die is detachably attached to an upper die holder that holds the upper die, a punch body vertically movable inside the guide, and a lower end portion of the punch body. An exciter including a blade tip provided for marking on a work placed on the lower die and a fluid pressure cylinder for lowering the punch body so as to press the punch body against the work, and vibrating the punch body and the blade tip finely up and down. Is provided outside the upper mold.

The stamping device in the punch press of the invention according to claim 4 is characterized in that an elastic member is provided on the upper surface of the lower mold according to claims 2 and 3.

The stamping device in the punch press of the invention according to claim 5 is a punch press for moving and positioning a gripped work in the X-axis direction and the Y-axis direction and processing the work by the cooperation of the upper die and the lower die. The lower die has a cutting edge facing upward to mark the lower surface of the work, and the upper die is detachably attached to an upper die holder that holds the upper die, and inside the guide. A punch body that is vertically movable, a pressing portion that is provided at the lower end of the punch body to press the work, a fluid pressure cylinder that lowers the punch body to press the work, and a punch body inside the punch body. A vibrator is provided which is provided to vibrate the punch body vertically.

An engraving device in a punch press according to a sixth aspect of the present invention is a punch press for moving and positioning a grasped work in the X-axis direction and the Y-axis direction and processing the work by cooperation of an upper die and a lower die. The lower die has a cutting edge facing upward to mark the lower surface of the work, and the upper die is detachably attached to an upper die holder that holds the upper die, and inside the guide. The punch body has a vertically movable punch body, a pressing portion provided at the lower end of the punch body to press the work, and a fluid pressure cylinder for lowering the punch body to press the work. An exciter for finely vibrating the body vertically is provided outside the upper mold.

The stamping device in the punch press of the invention according to claim 7 is such that when the upper die according to claims 2, 3, 5 and 6 is normally urged upward, but a force above a certain level is applied. It is characterized in that it has a release piston provided so as to be able to descend freely at the upper end portion.

The stamping device in the punch press of the invention according to claim 8 is characterized in that the fluid pressure cylinder according to claim 7 is supplied with pressure fluid from a striker of the punch press via the release piston. is there.

The stamping device in the punch press of the invention according to claim 9 is characterized in that the vibrator according to claim 2 or 5 is driven by a pressure fluid for driving the fluid pressure cylinder. .

[0015]

In the stamping method for the punch press according to the first aspect, the punching press provided on the upper die or the lower die is used to work the workpiece on the workpiece by the cooperation of the upper die and the lower die. Press on the top or bottom of
Vibrate the cutting edge or the work and simultaneously move the work
By moving in the axial direction and the Y-axis direction, arbitrary diagrams, characters, etc. are engraved on the work.

In a stamping device for a punch press according to a second aspect of the invention, the stamping device is used to move and position the gripped work piece in the X-axis direction and the Y-axis direction and to work the work piece by the cooperation of the upper die and the lower die. When performing, the upper die holder detachably holds the upper die guide. Further, the punch body moves up and down inside the guide by the fluid pressure cylinder, and the blade edge provided at the lower end portion of the punch body is pressed against the work placed on the lower die. At this time, a vibrator provided inside the punch body finely vibrates the punch body and the cutting edge vertically, and at the same time, the work is moved in the X-axis direction and the Y-axis direction to perform marking.

In the stamping device in the punch press according to the third aspect, the stamping work is performed by using the punch press that moves and positions the gripped work in the X-axis direction and the Y-axis direction and processes the work by cooperation of the upper die and the lower die. When performing, the upper die holder detachably holds the upper die guide. Further, the punch body moves up and down inside the guide by the fluid pressure cylinder, and the blade edge provided at the lower end portion of the punch body is pressed against the work placed on the lower die. At this time, an exciter provided outside the punch finely vibrates the punch body and the blade edge up and down, and at the same time, the work is moved in the X-axis direction and the Y-axis direction for marking.

In the stamping device for the punch press according to the fourth aspect, the elastic member provided on the upper surface of the lower die supports the lower surface of the work when the blade edge is pressed against the work according to the second and third aspects.

In a stamping device for a punch press according to a fifth aspect of the invention, the stamping work is performed by using a punch press that moves and positions the gripped work in the X-axis direction and the Y-axis direction and processes the work by the cooperation of the upper die and the lower die. When performing, the cutting edge provided upward on the lower die stamps on the lower surface of the work. At this time, the upper die holder detachably holds the upper die guide, the punch body provided inside this guide is lowered by the fluid pressure cylinder, and the vibrator inside the punch body vibrates vertically inside the guide. The pressing part provided at the lower end presses the work piece while vibrating the work piece.

In a stamping device for a punch press according to a sixth aspect, the gripping work is moved and positioned in the X-axis direction and the Y-axis direction, and the stamping is performed by using the punch press for working the work by cooperation of the upper die and the lower die. When performing, the cutting edge provided upward on the lower die stamps on the lower surface of the work. At this time, the upper die holder detachably holds the upper die guide, the punch body provided inside the guide is lowered by the fluid pressure cylinder, and the punch body is vertically vibrated by the exciter provided outside. The pressing portion provided at the lower end of the punch body presses the work piece while vibrating the work piece.

In the stamping device of the punch press of the invention according to claim 7, the release piston provided at the upper end of the upper die according to claims 2, 3, 5, and 6 is normally urged upward. When a force above a certain level is applied, it descends.

In the stamping device of the punch press of the invention according to claim 8, the fluid pressure cylinder according to claim 7 is supplied with the pressure fluid from the striker of the punch press through the release piston.

Further, in the marking device in the punch press of the invention according to claim 9, the vibrator according to claims 2 and 5 is driven by the pressure fluid for driving the fluid pressure cylinder.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings.

1 to 7 show a marking method for a punch press and a marking device for a punch press according to the first embodiment.

First, the entire turret punch press 1 will be outlined with reference to FIGS. 6 and 7. That is, a lower turret 5 provided with a plurality of lower dies 3 for rotation indexing and an upper part provided with a plurality of upper dies for rotary indexing freely. It has a turret 9. A striker 11 for hitting the punch 7 that has been indexed is provided above the upper turret 9 below the ram (not shown).

A clamp 13 for holding the workpiece W to be processed is provided in the carriage 15, and a carriage base 17 having the carriage 15 movably in the X-axis direction (the direction perpendicular to the paper surface in FIG. 6) is the Y-axis. It is provided so as to be movable in any direction (left-right direction in FIG. 6). As a result, the work W is supported by the free bearing 21 of the processing table 19, and is moved in the X axis direction and the Y axis direction by the movement of the carriage 15 and the carriage base 17.

In such a turret punch press 1,
The upper turret 9 and the lower turret 5 are rotationally indexed to select the desired punch 7 and die 3, the work W is positioned between the indexed punch 7 and die 3, and the striker 11 strikes the punch 7. By doing so, punching is performed.

Next, the marking device 23 will be described with reference to FIG. In FIG. 1, a punch 7, which is an upper die, is detachably attached to an upper turret 9 of a turret punch press 1. That is, the lifter 25 is attached to the upper turret 9 by a bolt 27 so as to be vertically movable, and is normally urged upward by a constant force by a lifter spring 29. Therefore, the lifter 25 descends when a downward force of a certain amount or more acts. A flange portion 33 provided on a guide 31 of the punch 7 described later is hooked on the lifter 25.

The punch 7 is composed of an upper cylinder 35, a central retainer 37 and a lower guide 31. The cylinder 35 and the retainer 37 are integrated by a bolt 39, and the guide 31 is connected to the retainer 37 by an O-ring 41.

A push-out piston 43 is provided in the internal space of the retainer 37 and the cylinder 35.
The ring 45 allows vertical movement while maintaining a sealed state. An air diverting hole 47 is vertically penetrated through the center of the pushing piston 43. Further, a grease reservoir 49 is provided to lubricate the pushing piston 43.

The cylinder 35 is provided above the pushing piston 43 in the internal space of the cylinder 35.
Release piston 51 projecting upward from the O-ring 53
Is provided so as to be vertically movable while maintaining a sealed state, and is normally urged upward by a spring 55 provided inside the cylinder 35. Therefore, when a force above a certain level is applied to the release piston 51, the release piston 51 can freely descend, so that even if the striker 11 strikes it by mistake, only the release piston 51 descends and the work W or the like is not damaged.

An air introduction hole 57 extends vertically through the center of the release piston 51. An O-ring 59 is provided on the upper surface of the release piston 51. The release piston 51 is the spring 5
In the state that the punch 7 is pushed up to the uppermost position, the punch 7 is positioned higher by δ than the top dead center (the position of the striker 11 shown in FIG. 1) of the striker 11 when the punch 7 is mounted on the upper turret 9. Has become.

On the other hand, a punch body 61 is provided in the inner space of the guide 31 so as to be vertically movable, and the spring 6
It is biased upward by 3. This punch body 61
In the center of the upper half part of the above, a cavity formed in two steps is provided, and a spring 65 is provided inside this cavity. Further, at the center of the lower end surface of the punch body 61, a blade tip 67 that can be projected downward from the punch body 61 is attached by a blade tip fixing cap 69. Further, an air discharge groove 71 and an air pressure distribution groove 73 are formed on the outer peripheral surface of the punch body 61.

A body cap 75 is attached to the upper side of the punch body 61 with bolts 77. An air inlet 79 is provided at the center of the body cap 75 and is connected to the air diverting hole 47 of the pushing piston 43 described above. A vibrator 81 is provided in the cavity of the punch body 61 so as to be vertically movable, and is urged upward by the spring 65 to be pressed against the lower surface of the body cap 75.

The die 3 is detachably mounted on the lower turret 5 so as to face the punch 7 described above. An elastic member 83 made of, for example, hard rubber or plastic is fitted in the center of the upper surface of the die 3.

Next, referring to FIG. 2, the vibrator 81 of the punch body 61 in the punch 7 configured as described above.
I will explain the movement.

FIG. 2A shows the initial state. In this state, the vibrator 81 is pushed upward by the repulsive force of the spring 65 and pressed against the lower surface of the body cap 75, and does not move. Also, no air was sent.

FIG. 2B shows a state in which compressed air is supplied from the air inlet 79 and the vibrator 81 is pushed down against the repulsive force of the spring 65.

FIG. 2C shows a state where the vibrator 81 is completely lowered due to the supplied air pressure. In this state, compressed air flows out from the air discharge groove 71,
The pressure in the space G1 decreases. At the same time, the air pressure distribution groove 73
The pressure in the space G1 also acts on the lower surface of the vibrator 81.
As a result, the pressure of the upper surface and the lower surface of the vibrator 81 becomes the same, and the vibrator 81 rises due to the repulsive force of the spring 65.

The state shown in FIG. 2D is a state in which the vibrator 81 has risen and returned to the initial state, which is the same state as the state in FIG. 2A. Therefore, by repeating FIGS. 2A to 2C, the vibrator 81 vibrates up and down. The frequency of the vibrator 81 is approximately f = (k / m) ^{1/2 in the} primary vibration model. Therefore, the period ω is ω = 1 / f. Where f
Is the frequency, k is the spring constant of the spring 65, and m is the mass of the oscillator 81.

Next, the marking operation will be described with reference to FIG. First, the upper and lower turrets 9 and 5 are rotationally indexed to select the punch 7 and the die 3. Punch 7 is striker 11
Thus, it is pushed down by δ shown in FIG. Therefore, the lifter 25 descends by δ, and the lifter spring 29 is compressed accordingly. Due to the repulsive force of the lifter spring 29, the release piston 51 is pressed against the lower surface of the striker 11 at the top dead center position and is in close contact with the O-ring 59 on the upper surface of the release piston 51.

Subsequently, when compressed air is supplied to the punch 7 through the air pressure insertion hole 85 provided in the center of the striker 11, the compressed air flows into the space G2 and the push-out piston 43 is pushed down to move the punch body 61 downward. Push down. As a result, the blade edge 67 is pushed down by (L-t) and hits the work W. At this time, the spring 63 is also (L-
Although it shrinks by t), the repulsive force at this time is F1. Also,
As an example, when the spring constant is k = 0.2, the plate thickness t of the work W is sufficiently smaller than L, so that F1 is set constant regardless of the plate thickness t (F1≈constant).

When the pressure receiving area of the pushing piston 43 is A and the state of FIG. 2B is considered, the internal pressure of the space G2 is P
When the force is 0, the pushing force F2 of the pushing piston 43 is
F2 = P0 · A.

Further, considering the state of FIG. 2 (C),
Since the space G2 also decreases as the internal pressure of the space G1 decreases, the force F2 ′ pushed out by the push-out piston 43 becomes F2 ′ = P1 · A when the internal pressure is P1. However,
P1 <P0, F2 ′ ≧ F1′A: Extrusion piston 43
Is the effective area of.

Therefore, the pushing force of the pushing piston 43 fluctuates in the cycle ω between F2 and F2 '(see FIG. 4). As a result, the force applied to the cutting edge 67 for marking will fluctuate with a cycle ω from (F2-F1) to (F2'-F1) (see FIG. 5). The magnitude relationship of the forces at this time is F2> F2 ′ ≧ F1.

According to the stamping method and stamping die in such a punch press, the blade tip 67 vibrates so as to poke the upper surface of the work W. Therefore, in this state, the work W is moved in the X-axis direction as shown in FIG. And by moving in the Y-axis direction, it is possible to engrave an arbitrary diagram or character.
Further, since the elastic member 83 such as hard rubber provided on the upper surface of the die 3 acts as a damper, noise can be prevented.

Further, even if punching is performed by mistake, since the release piston 51 is provided so as to be able to descend, it is possible to prevent damage to the punch 7, the die 3 and the like.

Next, a second embodiment will be described with reference to FIG. In FIG. 8, the same parts as those in FIG. 1 are designated by the same reference numerals and overlapping description will be omitted. That is, in FIG. 8, the pushing piston 43 having the air diverting hole 47 in FIG. 1, the O-ring 45 and the grease reservoir 49 accompanying it are omitted and simplified.

With the above construction, when the pushing piston 43 is omitted, the force F2 for pushing down the punch body 61 is F2 = P · A2 (where A2 is the effective area of the punch body 61). At this time, A2> A1
(However, if A1 is the effective area of the push-out piston 43), then F2 ≧ F1, and even if the push-out piston 43 is omitted, the punch body 61 can be pushed down sufficiently, similar to the first embodiment in FIG. And the effect of.

Next, a third embodiment will be described with reference to FIGS. Here, parts that are the same as those in the first embodiment described above will be assigned the same reference numerals and overlapping description will be omitted.

The third embodiment shown in FIG. 9 differs from the first embodiment described above in the following points in structure. In the punch 87 of the second embodiment, the vibrator 81 of the first embodiment is not provided inside the punch body 89. The rest of the configuration is the same as that of the embodiment shown in FIG. 1, the same parts are designated by the same reference numerals, and the description of the overlapping parts will be omitted.
Therefore, the exciter 91 shown in FIGS.
Is provided outside the punch 87 as shown in FIG.

The exciter 91 shown in FIG. 10 comprises a cylinder block 93 and a cylinder head 95, and the cylinder head 95 is provided with an air input hole 97 and an air discharge hole 99. Further, a vibrator 101 is reciprocally provided inside the cylinder block 93, and a spring 103 presses the vibrator 101 toward the cylinder head 95 side. Further, an air distribution hole 105 and a holset bolt 107 are provided inside the cylinder block 93.

The operation of the exciter 91 will be described with reference to FIG. The initial state is shown in FIG.
As shown in FIG. 11B, when compressed air is supplied from the air input hole 97, the pressure causes the vibrator 101 to move to the left in the drawing. Next, as shown in FIG. 11C, when the vibrator 101 is sufficiently moved to the left, the air exhaust hole 9
Since air flows out from 9, the pressure in the space G3 decreases.

At the same time, the pressure in the space G3 also acts on the left side surface of the vibrator 101 by the air distribution hole 105. Therefore, the left and right side surfaces of the vibrator 101 have the same pressure, and the repulsive force of the spring 103 causes the vibrator 101 to move rightward in the drawing. (FIG. 11D) shows a state in which the vibrator 101 has returned to the state shown in FIG.
It is in the same state as (A).

Therefore, by repeating FIGS. 11A to 11C, the vibrator 101 vibrates. The frequency of the oscillator 101 is approximately f = (k / m) ^{1/2 in the} primary vibration model. Therefore,
The period ω is ω = 1 / f. Where f is the frequency, k
Represents the spring constant of the spring 103, and m represents the mass of the oscillator 101.

An air pressure circuit as shown in FIG. 12 is assembled using the exciter 91 as described above. That is, the exciter 91 is provided from the pressure source 109 via the air pressure adjusting unit 111, and the punched body 89 inside the punch 87 is vibrated by the vibrating compressed air from the exciter 91 to vibrate the cutting edge 67. .

When the stamping die in such a punch press is used, a force as shown in FIG. 14 acts. Therefore, the force with which the cutting edge 67 contacts the work W has a shape as shown in FIG. It is shown that the cutting edge 67 is not in contact with the work W in the portion indicated by the broken line in FIG. 15, that is, in the portion where the negative force acts.

As described above, the cutting edge 67 is the work W.
By vibrating by changing the force that contacts the
The same operation and effect as those of the above-mentioned first embodiment are exhibited.

Incidentally, instead of the exciter 91 described above, FIG.
Even when the electromagnetic 2-port switching valve 113 as shown in FIG. 3 is used as an exciter to vibrate the punch body 89, the same effect can be obtained.

Next, a fourth embodiment will be described with reference to FIGS. 16 and 17. Here, parts common to those of the first embodiment or the second embodiment described above will be denoted by common reference numerals and redundant description will be omitted.

In the fourth embodiment shown in FIG. 16,
The following points are structurally different from the above-described embodiment. That is, in this embodiment, the cutting edge 117 for marking is provided on the die 115 side.
Are provided, and the punch 119 side presses the work W against the die 115 while vibrating, thereby marking the lower surface of the work W.

That is, as shown in FIG. 16, an elastic member 123 such as hard rubber or plastic is provided on the lower end surface of the punch body 121 of the punch 119 instead of the cutting edge 67.

Further, an ejector plate 127 is provided on the upper side of the die body 125 of the die 115 with a stripper bolt 129.
And is always urged upward by a spring 131. A cutting edge 117 for engraving is attached to the inside of the die body 125 by a holset bolt 133 so as to face upward. The cutting edge 117 has a hole 135 (FIG. 17) provided at the center of the ejector plate 127 when the ejector plate 127 is pushed down.
(Refer to)).

Next, the operation of the die 115 will be described with reference to FIG. In the die 115, the ejector plate 127 is normally positioned above the upper end of the cutting edge 117 by δ ₀ by the spring 131 (see FIG. 17A).

When the work W is placed on the ejector plate 127, the weight of the work W acts as a downward load w, and the ejector plate 127 descends by δ ₁ . Here, when the spring constant of the spring 131 is k, when w = δ ₁ · k <δ ₀ · k, δ ₁ <δ ₀
Therefore, since the cutting edge 117 does not contact the lower surface of the work W, it is not damaged (see FIG. 17B).

Referring also to FIG. 16, the punch 119
When compressed air is supplied to, the push-out piston 43 is pushed out downward, and the punch body 121 is pushed out by this (acting force is F2), so that the work W is pressed against the die 115 by the force of F2 and descends by δ _2. Yes (Fig. 1
7 (C)). At this time, w + F2 = δ ₂ · k> δ ₀
・ By setting k, δ ₂ > δ ₀ and the cutting edge 11
7 contacts the lower surface of the work W.

Since the magnitude of F2 varies in a constant cycle as described in the above embodiment, the punch body 121 also vibrates.

Since it is constructed as described above, the die 1
Since the punch body 121 vibrates the work W placed on the work piece 15 against the cutting edge 117, by moving the work W in the X-axis direction and the Y-axis direction, an arbitrary diagram, character, or the like is transferred to the work W. Can be engraved on the underside of.

Here, in the punch 119 shown in FIG. 16, the punch body 12 is used as described in the first embodiment.
Although the case where the work W is pressed while vibrating by the vibrator 81 provided inside 1 has been described, the punch body 121 is vibrated by the exciter 91 provided outside the punch 119 as described in the third embodiment. Even if it is made to do, it is exactly the same.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes.

[0072]

As described above, in the stamping method in the punch press according to the invention of the first aspect, the upper die or the lower die is used by using the punch press which processes the work by cooperation of the upper die and the lower die. The marking edge provided on the is pressed against the upper surface or the lower surface of the work, and the work is moved in the X-axis direction and the Y-axis direction, so the work is marked. be able to. At this time, since the marking is performed while vibrating the cutting edge or the work, the work can be easily moved.

In the stamping device in the punch press according to the second aspect, the gripping work is moved and positioned in the X-axis direction and the Y-axis direction, and the stamping is performed by using the punch press for working the work by cooperation of the upper die and the lower die. In order to perform the above, a fluid pressure cylinder for vertically moving the punch body is provided inside the upper die guide held by the upper die holder, and the cutting edge provided at the lower end portion of the punch body is placed on the lower die. It is pressed against the work and stamped. For this reason, if a die is selected, stamping can be performed using a conventional punch press. Further, at this time, the vibrator provided inside the punch body finely vibrates the punch body and the blade edge up and down, so that the work can be easily moved in the X-axis direction and the Y-axis direction, and any diagram or character Can be stamped on the upper surface of the work. Further, since the vibrator is provided inside the punch body, the device can be downsized.

In a stamping device for a punch press according to a third aspect of the present invention, the gripping work is moved and positioned in the X-axis direction and the Y-axis direction, and the work is performed by the cooperation of the upper die and the lower die. In order to perform the above, a fluid pressure cylinder for vertically moving the punch body is provided inside the upper die guide held by the upper die holder, and the cutting edge provided at the lower end portion of the punch body is placed on the lower die. It is pressed against the work and stamped. For this reason, if a die is selected, stamping can be performed using a conventional punch press. Further, at this time, an exciter provided separately from the upper die finely vibrates the punch body and the cutting edge up and down, so that the work can be easily moved in the X-axis direction and the Y-axis direction, and an arbitrary diagram And letters can be engraved on the upper surface of the work. Further, since the exciter for vibrating the punch body is provided separately from the upper die, the upper die can be downsized and the structure can be simplified.

In the stamping device for the punch press according to the fourth aspect, when the blade edge is pressed against the work according to the second and third aspects, the elastic member provided on the upper surface of the lower die supports the lower surface of the work. It is possible to prevent the work from vibrating and generating noise due to the vibration of the cutting edge.

In the stamping device of the punch press according to claim 5, the gripping work is moved and positioned in the X-axis direction and the Y-axis direction, and the stamping is performed by using the punch press for processing the work by cooperation of the upper die and the lower die. In order to perform the above, since the cutting edge provided on the lower mold in the upward direction is engraved, the lower surface of the work can be engraved. At this time, the fluid pressure cylinder provided in the upper die lowers the punch body,
Since the vibrator provided inside the punch body vibrates the punch body finely in the vertical direction, the work can be pressed against the cutting edge and easily moved in the X-axis direction and the Y-axis direction. Can be engraved. Further, since the vibrator is provided inside the punch body, the device can be downsized.

In the stamping device of the punch press according to claim 6, the gripping work is moved and positioned in the X-axis direction and the Y-axis direction, and the stamping is performed by using the punch press for processing the work by cooperation of the upper die and the lower die. In order to perform the above, since the cutting edge provided on the lower mold in the upward direction is engraved, the lower surface of the work can be engraved. At this time, the fluid pressure cylinder provided in the upper die lowers the punch body to press the work against the cutting edge, and the exciter provided separately from the upper die vibrates the upper die punch body finely in the vertical direction. The work can be easily moved in the X-axis direction and the Y-axis direction, and an arbitrary diagram or character can be engraved on the upper surface of the work. Further, since the exciter for vibrating the punch body is provided separately from the upper die, the upper die can be downsized and the structure can be simplified.

In the stamping device of the punch press of the invention according to claim 7, the release piston provided at the upper end of the upper die according to claims 2, 3, 5, and 6 is normally urged upward. When a certain amount of force is applied, it descends so that the work is not damaged even if it is accidentally hit.

In the stamping device of the punch press of the invention according to claim 8, since the fluid pressure cylinder according to claim 7 is supplied with the pressure fluid from the striker of the punch press through the release piston, a separate pipe is provided. No need, simple structure.

Further, in the marking device in the punch press of the invention according to claim 9, since the vibrator according to claims 2 and 5 is driven by the pressure fluid for driving the fluid pressure cylinder, separate pipes for pressure fluid are provided. Need not be provided. This simplifies the structure.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of a marking device in a punch press according to the present invention.

FIG. 2 is an explanatory diagram showing the operation of the vibrator in FIG.

FIG. 3 is a sectional view showing a marking operation in the first embodiment shown in FIG.

FIG. 4 is a graph showing a periodic force acting on an oscillator and a spring force.

FIG. 5 is a graph showing a combined force of a periodic force acting on a vibrator and a spring force.

FIG. 6 is a schematic view of a turret punch press to which a marking method and a marking device in a punch press according to the present invention are applied.

FIG. 7 is a schematic view of a turret punch press to which a marking method and a marking device in a punch press according to the present invention are applied.

FIG. 8 is a sectional view showing a second embodiment of the marking device in the punch press according to the present invention.

FIG. 9 is a sectional view showing a third embodiment of the marking device in the punch press according to the present invention.

10A is a plan view showing an exciter, FIG. 10B is a front view, and FIG. 10C is a side view.

FIG. 11 is an explanatory diagram showing a vibration state in the exciter.

FIG. 12 is an example of a circuit diagram for vibrating the blade in the third embodiment.

FIG. 13 is another example of a circuit diagram for vibrating the cutting edge in the third embodiment.

FIG. 14 is a graph showing the force acting on the cutting edge and the force of the spring.

FIG. 15 is a graph showing a force acting at the time of marking.

FIG. 16 is a sectional view showing a fourth embodiment of the marking device in the punch press according to the present invention.

FIG. 17 is an explanatory diagram showing a state of a die at the time of marking.

[Explanation of symbols]

 1 Turret punch press 3,115 Die (lower mold) 7,87,119 Punch (upper mold) 23 Marking device 25 Lifter (upper mold holder) 31 Guide 35 Cylinder 61,89,121 Punch body 67,117 Cutting edge 81,101 Transducer 83 Elastic member 91 Exciter W Work

Claims (9)

[Claims] 1. A punch press for working a work by cooperation of an upper die and a lower die, wherein a marking blade provided on the upper die or the lower die is pressed against an upper surface or a lower surface of the work, and the blade edge is formed. Alternatively, a marking method in a punch press, characterized in that a work is vibrated and at the same time, the work is moved in the X-axis direction and the Y-axis direction to engrave an arbitrary diagram, characters, etc. on the work. 2. A punch press for moving and positioning a gripped work piece in the X-axis direction and the Y-axis direction to machine the work piece by cooperation of an upper die and a lower die, wherein the upper die holds the upper die. A guide that is removably attached to the upper die holder, a punch body that is vertically movable inside this guide, and a stamp on the lower die of the work placed on the lower die. And a vibrator provided inside the punch body for finely vibrating the punch body and the blade tip up and down, and a fluid pressure cylinder for lowering the punch body to press it against a work. A marking device for a punch press, which is characterized in that 3. A punch press for moving and positioning a gripped work in the X-axis direction and the Y-axis direction to process the work by cooperation of an upper die and a lower die, wherein the upper die is configured to A guide that is detachably attached to an upper die holder that holds it, a punch body that is vertically movable inside the guide, and a workpiece that is placed on the lower die at the lower end of the punch body. A blade tip provided for marking and a fluid pressure cylinder for lowering the punch body to press it against a work, and an exciter for finely vibrating the punch body and the blade tip up and down is provided outside the upper die. Marking device for punch press. 4. The marking device in a punch press according to claim 2, wherein an elastic member is provided on the upper surface of the lower die. 5. A punch press for moving and positioning a gripped work in the X-axis direction and the Y-axis direction to machine the work by cooperation of an upper die and a lower die, wherein the lower die stamps the lower surface of the work. In order to do so, while having the blade edge upward, the upper die, a guide that is detachably attached to an upper die holder that holds the upper die, and a punch body that is vertically movable inside the guide, A pressing portion provided at the lower end of the punch body to press the work, a fluid pressure cylinder for lowering the punch body to press the work, and a fine vibration of the punch body provided inside the punch body up and down. An engraving device in a punch press, comprising: 6. A punch press for moving and positioning a gripped work in the X-axis direction and the Y-axis direction to machine the work by cooperation of an upper die and a lower die, wherein the lower die stamps the lower surface of the work. In order to do so, while having the blade edge upward, the upper die, a guide that is detachably attached to an upper die holder that holds the upper die, and a punch body that is vertically movable inside the guide, An exciter having a pressing portion provided at the lower end portion of the punch body for pressing the work and a fluid pressure cylinder for lowering the punch body to press the work, and an exciter for finely vibrating the punch body up and down is provided. An engraving device for a punch press, which is provided outside the upper die. 7. The upper die has a release piston at its upper end portion, which is normally urged upward, but is capable of descending when a force of a certain amount or more is applied. A marking device for a punch press according to claim 2, 3, 5, or 6. 8. The marking device in a punch press according to claim 7, wherein the fluid pressure cylinder is supplied with a pressure fluid from a striker of the punch press via the release piston. 9. The marking device in a punch press according to claim 2, wherein the vibrator is driven by a pressure fluid for driving the fluid pressure cylinder.