WO2010101094A1

WO2010101094A1 - Punching die

Info

Publication number: WO2010101094A1
Application number: PCT/JP2010/053132
Authority: WO
Inventors: 宏仲井
Original assignee: 株式会社アマダ
Priority date: 2009-03-05
Filing date: 2010-02-26
Publication date: 2010-09-10
Also published as: TW201032915A; TWI378834B; JP5412146B2; JP2010201494A

Abstract

Provided is a punching die having an upper punch driver (5) which is provided in a cylindrical punch guide (3) so as to move upward and downward and a lower punch driver (13) which is provided with an integral or integrally formed punch cutter at its lower end, wherein the upper punch driver and the lower punch driver are screw-engaged with each other so as to be relatively adjustable in the upward and downward directions. The lower punch driver (13) is provided with a key (15) which is engaged in a key way (3G) provided in the punch guide (3) to restrict the rotation of the lower punch driver (13) relative to the punch guide (3). In order to restrict a small amount of relative movement of the upper punch driver (5) and the lower punch driver (13) due to a slight clearance of the thread engagement portion, a close fit portion (23) in which the upper punch driver (5) and the lower punch driver (13) are slidably fitted to each other is provided.

Description

Punch mold

The present invention relates to a punch die used in a punch press such as a turret punch press, and more particularly to a punch die that can be adjusted in height after re-polishing the punch blade portion.

A punch die used in a punch press such as a turret punch press is provided with a cylindrical punch guide supported by a punch holder such as an upper turret so as to be movable up and down. The punch guide includes an upper punch driver. Is provided to move up and down. In the upper punch driver, a lower punch driver integrally provided with a punch body having a punch blade portion formed at the lower end portion or a lower punch driver integrally provided with a punch blade portion is provided to be movable up and down. The lower punch driver is screwed to the upper punch driver so as to be vertically adjustable. Further, the lower punch driver is integrally provided with a key slidably engaged with a key groove provided in the punch guide. The above technique is disclosed in, for example, Patent Document 1 and Patent Document 2.

In the conventional punch mold, the upper punch driver and the lower punch driver are screwed together so that they can be adjusted relative to each other. Therefore, when re-polishing due to wear of the punch blade, This is preferable because it can be easily corrected.

However, in the conventional configuration, the key sometimes breaks. The above-mentioned key breakage was thought to be due to the slight movement between the punch guide, the lower punch driver, and the punch body, and the lower punch driver moved and rotated slightly relative to the punch guide. . However, when various experiments were conducted, when the upper punch driver and the lower punch driver were screwed together, if the axis of the upper punch driver and the axis of the lower punch driver were slightly displaced, When punching (punching) is performed, the component force resulting from the joining of the thread of the threaded portion of the upper punch driver and the lower punch driver acts, and the backlash exists in the threaded portion, It has been found that the lower punch driver relatively moves in the radial direction relative to the punch driver.

Japanese Unexamined Patent Publication No. 2005-246393 Japanese Unexamined Patent Publication No. 2006-142372

This invention has been made to solve the above-mentioned problems. Accordingly, an object of the present invention is to provide a punch die that can prevent a key from being damaged or the like by restricting the minute movement of the lower punch guide in the radial direction relative to the upper punch guide.

In order to achieve the above object, a first aspect of the present invention is a punch die comprising the following: a cylindrical punch guide; an upper punch driver provided on the punch guide so as to be movable up and down; A lower punch driver that is screwed so as to be vertically adjustable relative to the upper punch driver; a punch blade portion that is provided integrally or integrally with the lower punch driver; and a relative position of the lower punch driver with respect to the punch guide A key groove provided in the punch guide for restricting the rotation of the key; a key engaging with the key groove, provided in the lower punch driver; and between the upper punch driver and the lower punch driver. In order to restrict the relative fine movement in the radial direction due to the minute clearance of the threaded portion, the upper punch driver and the lower punch Contact fitting portion fitted slidably and driver.

According to a second aspect of the present invention, which is dependent on the first aspect, in the punch die, the close fitting portion is provided on both upper and lower end sides of the upper punch driver and the lower punch driver; The diameter of the lower close fitting part is larger than the diameter of the close fitting part.

In order to achieve the above object, a third aspect of the present invention is a punch mold comprising the following: a cylindrical punch guide; an upper punch provided on the punch guide so as to be movable up and down. A driver; a lower punch driver screwed to be adjustable relative to the upper punch driver; a punch blade provided integrally with or integrally with the lower punch driver; a lower punch driver of the lower punch driver with respect to the punch guide; A key groove provided in the punch guide for restricting relative rotation; a key engaged with the key groove, provided in the lower punch driver; and the upper punch driver and the lower punch driver The upper punch driver and the upper punch driver in order to restrict relative fine movement in the radial direction due to a minute clearance of the screwed portion. The first contact fitting portion fitted and Nchigaido slidably.

According to a fourth aspect of the present invention, which is dependent on the third aspect, the punch mold further includes: in a relative radial direction due to a minute clearance of the screwed portion between the upper punch driver and the lower punch driver. A second close fitting portion in which the lower punch driver and the punch guide are slidably fitted to restrict fine movement of the lower punch driver.

Further, in order to achieve the above object, a fifth aspect of the present invention is a punch die comprising the following: a cylindrical punch guide; an upper punch provided on the punch guide so as to be movable up and down. A driver; a lower punch driver screwed to be adjustable relative to the upper punch driver; a punch blade provided integrally with or integrally with the lower punch driver; a lower punch driver of the lower punch driver with respect to the punch guide; A key groove provided in the punch guide for restricting relative rotation; a key engaged with the key groove, provided in the lower punch driver; and the upper punch driver and the lower punch driver In order to restrict the relative fine movement in the radial direction due to the minute clearance of the screwed portion with the lower punch driver and the Contact fitting portion fitted slidably and Nchigaido.

The punch mold according to the present invention described in the first aspect and the second aspect includes a close fitting portion in which an upper punch driver and a lower punch driver are slidably fitted. Furthermore, the punch die according to the present invention described in the third aspect to the fifth aspect is a close fitting portion in which the upper punch driver and the punch guide are slidably fitted, or the lower punch driver and the punch guide. Are slidably fitted to each other, or both of them are provided. Therefore, according to the present invention described in the first aspect to the fifth aspect, there is a backlash in the threaded portion between the upper punch driver and the lower punch driver, and a radial component force acts during punching. Even so, the relative minute movement of the lower punch guide in the radial direction with respect to the upper punch guide can be restricted, and damage to the key or the like can be prevented.

FIG. 1 is an explanatory cross-sectional view showing the configuration of a punch die according to the first embodiment of the present invention. FIG. 2 is a cross-sectional explanatory view showing the configuration of the punch die according to the second embodiment of the present invention. FIG. 3 is a cross-sectional explanatory view showing the configuration of a punch die according to the third embodiment of the present invention. FIG. 4 is a cross-sectional explanatory view showing the configuration of a punch die according to the fourth embodiment of the present invention. FIG. 5 is a cross-sectional explanatory view showing the configuration of a punch die according to the fifth embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The outline of the overall configuration of the punch die will be described below.

Referring to FIG. 1, a punch die 1 according to an embodiment of the present invention has a cylindrical shape supported by a punch holder such as an upper turret in a punch press (not shown) such as a turret punch press so as to be movable up and down. This punch guide 3 is provided with a cylindrical upper punch driver 5 that can move up and down. More specifically, a ring-shaped retainer collar 7 is provided on the upper portion of the punch guide 3, and an upper end of the upper punch driver 5 penetrating the retainer collar 7 so as to be movable up and down is provided with an attachment screw or the like. A disc spring 11 as a stripper spring is mounted between the punch head 9 and the retainer collar 7 which are integrally attached. A lubricant such as grease is accommodated in a sealed space formed by overlapping the disc springs 11.

The lower end portion of the upper punch driver 5 located in the punch guide 3 is provided with a large-diameter flange portion 5F. The upper punch driver 5 is provided with a female screw portion 5S as in the conventional punch die.

The male screw portion 5S of the lower punch driver 13 is screwed to the female screw portion 5S of the upper punch driver 5 so as to be vertically adjustable. The height of the punch die 1 is adjusted by adjusting the vertical positional relationship between the upper punch driver 5 and the lower punch driver 13 by adjusting the screw engagement between the female screw portion 5S and the male screw portion 13S. The lower punch driver 13 is provided with a large-diameter flange portion 13F located below the flange portion 5F in the upper punch driver 5. The flange portion 13F is formed on the punch guide 3. A key 15 that is slidably closely engaged with the key groove 3G in the vertical direction is integrally attached by a mounting screw or the like. Further, a punch body 17 having a punch blade portion at the lower end portion is integrally attached to the lower portion of the lower punch driver 13 with an attachment screw or the like.

The key 15 is provided long in the radial direction of the flange portion 13F, and is integrally fixed to the flange portion 13F so as not to move. The close engagement between the key 15 and the key groove 3G is such that the clearance between the key 15 and the key groove 3G maintains a very small clearance in micron units.

In the above description, the case where the lower punch driver 13 and the punch body 17 are separately provided has been described. However, the lower punch driver 13 and the punch body 17 may be integrally provided in advance. .

In the above configuration, after positioning the processing position of the plate-like workpiece on a die die (not shown) that is paired with the punch die 1, the punch head 9 is struck by a ram (striker) in a punch press, The workpiece is punched. When punching is performed as described above, the striking force of the ram is transmitted from the punch head 9 to the lower punch driver 13 through the female screw portion 5S of the upper punch driver 5 and the male screw portion 13S of the lower punch driver 13.

At this time, if the axial center of the upper punch driver 5 and the axial center of the lower punch driver 13 coincide with each other, the relationship between the troughs and crests of the female screw part 5S and the crests and troughs of the male screw part 13S. The component forces acting in the radial direction due to the joint relationship cancel each other, and the lower punch driver 13 does not move minutely in the radial direction relative to the upper punch driver 5. However, if the shaft center of the upper punch driver 5 and the shaft center of the lower punch driver 13 are slightly shifted due to the presence of backlash in the screwed portion, the punch head 9 is hit (beated) by the ram. When the punching process is performed under pressure, the lower punch driver 13 may slightly move in the radial direction relative to the upper punch driver 5 so as to correct the slight displacement.

The movement direction of the relative minute movement of the lower punch driver 13 in the radial direction with respect to the upper punch driver 5 is the longitudinal direction of the key 15, that is, the direction in which the key guide 3G enters and exits the key groove 3G of the punch guide 3 (left and right direction in FIG. ), The engagement relationship between the keyway 3G and the key 15 is changed only slightly, and the key 15 is not damaged.

However, the relative minute movement direction of the lower punch driver 13 in the radial direction with respect to the upper punch driver 5 is perpendicular to the longitudinal direction of the key 15, in other words, relative to the longitudinal direction of the key groove 3G. When the key groove 3G is perpendicular to the width direction (perpendicular to the plane of the drawing in FIG. 1), the key groove 15G is larger than the key groove 3G. A load is applied and sometimes the key 15 is damaged.

Therefore, in the punch mold 1 according to the present embodiment, even when a backlash exists in the screwed portion between the upper punch driver 5 and the lower punch driver 13, the upper punch driver 5 and the lower punch driver 13 are used. When the two are screwed together, both axial centers coincide with each other.

More specifically, a close fitting hole 19 having a diameter larger than that of the female screw portion 5S and processed with high accuracy is formed at the lower portion of the upper punch driver 5, and the flange portion is formed below the lower punch driver 13. A high-precision fitting portion 21 processed with high accuracy corresponding to the close fitting hole 19 is provided above 13F. The close fitting hole 19 and the high precision fitting portion 21 are slidably fitted to form a close fitting portion 23.

The tight fitting portion 23 slidably fitted into the tight fitting hole 19 and the high precision fitting portion 21 is extremely small in units of microns between the tight fitting hole 19 and the high precision fitting portion 21. The upper punch driver 5 is closely slidably fitted while maintaining a clearance, and is caused by a slight backlash existing in a screwed portion between the upper punch driver 5 and the lower punch driver 13. The lower punch driver 13 has a function of restricting fine movement in the relative radial direction. That is, the minute clearance of the close fitting part 23 is set to be slightly smaller than the backlash of the screwed part (micron unit clearance).

With the above configuration, when the male screw portion 13S of the lower punch driver 13 is screwed into the female screw portion 5S of the upper punch driver 5, the shaft center of the lower punch driver 13 with respect to the shaft center of the upper punch driver 5 is due to the presence of backlash. Even if it is slightly deviated, the screwing of the female screw portion 5S and the male screw portion 13S proceeds, and the close fitting hole 19 of the upper punch driver 5 and the high precision fitting portion 21 of the lower punch driver 13 When the two are slidably fitted together, the axis of the upper punch driver 5 and the axis of the lower punch driver 13 coincide with each other.

Therefore, when punching is performed by pressing the punch head 9 with a ram as described above, the crests and troughs of the female screw part 5S in the upper punch driver 5 and the troughs and crests of the male screw part 13S in the lower punch driver 13 are performed. A component force in the radial direction acts due to the engagement relationship with the portion. However, since the shaft center of the upper punch driver 5 and the shaft center of the lower punch driver 13 are matched by the close fitting of the close fitting part 23, the radial component forces cancel each other, and the key 15 is not damaged or the like.

Even when the lower punch driver 13 tends to slightly move in the radial direction relative to the upper punch driver 5 due to the component force in the radial direction, the upper punch driver 5 and the lower punch driver 13 The minute movement is restricted in the close fitting part 23, and relative minute movement can be prevented.

2 shows that the diameter of the close fitting hole 19 shown in FIG. 1 is made equal to the valley diameter of the female screw portion 5S, and the diameter of the high precision fitting portion 21 is made equal to the outer diameter of the male screw portion 13S. Since this configuration is the same as that of the first embodiment described above, a more detailed description is omitted. This configuration also provides the same effects as those of the above-described embodiment.

FIG. 3 shows a third embodiment. In the third embodiment, the upper and lower ends of the upper punch driver 5 and the lower punch driver 13 are each provided with close contact fitting portions 23, and the diameter of the close contact fitting portion 23 on the lower side is larger. The diameter of the close fitting part 23 on the upper side is configured to be small. According to this configuration, the close fitting portions 23 are provided on both upper and lower ends, so that the axis center of the upper punch driver 5 and the axis center of the lower punch driver 13 are more accurately matched. An effect similar to that of the form can be obtained.

FIG. 4 shows a fourth embodiment. In this embodiment, the lower punch driver 13 is provided with a close fitting portion 25 (first close fitting portion) for closely fitting the flange portion 5F and the punch guide 3 in the upper punch driver 5 so as to be slidable. This is a configuration provided with a close fitting portion 27 (second close fitting portion) for closely fitting the flange portion 13F and the punch guide 3 in a slidable manner. In this configuration, the axial center of the punch guide 3, the axial center of the upper punch driver 5, and the axial center of the lower punch driver 13 coincide with each other, and the same effects as those of the above-described embodiment can be obtained.

FIG. 5 shows the fifth embodiment, which is a combination of the configuration of the third embodiment and the configuration of the fourth embodiment described above. In the fifth embodiment, similarly to the configuration of the third embodiment, the upper and lower ends of the upper punch driver 5 and the lower punch driver 13 are respectively provided with close fitting portions 23, and the lower side The diameter of the close fitting part 23 on the upper side is configured to be smaller than the diameter of the close fitting part 23. Further, in the fifth embodiment, as in the configuration of the fourth embodiment, the close fitting portion 25 for closely fitting the flange portion 5F and the punch guide 3 in the upper punch driver 5 so as to be slidable is provided. It is the structure provided with the close_contact | adherence fitting part 27 which fits the flange part 13F and the punch guide 3 in the lower punch driver 13 so that sliding is possible. The configuration according to the fifth embodiment can achieve the same effects as those of the above-described embodiment.

As understood from the above description, when the female screw portion 5S of the upper punch driver 5 and the male screw portion 13S of the lower punch driver 13 in the punch die 1 are screwed together, the upper punch driver is operated by the action of the close fitting portion. 5 and the axis of the lower punch driver 13 coincide with each other, so that the problem caused by the slight deviation between the axis of the upper punch driver 5 and the axis of the lower punch driver 13 is solved. This can solve the conventional problems as described above.

Note that the entire content of Japanese Patent Application No. 2009-056222 (filed on Mar. 5, 2009) is incorporated herein by reference.

The present invention is not limited to the description of the embodiment of the invention described above, and can be implemented in various other modes by making appropriate modifications.

Claims

The punch mold includes the following:
Cylindrical punch guide;
An upper punch driver provided on the punch guide to be movable up and down;
A lower punch driver that is screwed to be adjustable relative to the upper punch driver;
A punch blade provided integrally or integrally with the lower punch driver;
A keyway provided in the punch guide for restricting relative rotation of the lower punch driver with respect to the punch guide;
A key that engages with the key groove, and is provided on the lower punch driver; and restricts relative fine movement in the radial direction due to a minute clearance of the screwed portion between the upper punch driver and the lower punch driver. Therefore, the close fitting part which slidably fitted the upper punch driver and the lower punch driver.
In the punch die according to claim 1,
The close fitting part is provided on both upper and lower ends of the upper punch driver and the lower punch driver; and the diameter of the lower close fitting part is larger than the diameter of the upper close fitting part. It is.
The punch mold includes the following:
Cylindrical punch guide;
An upper punch driver provided on the punch guide to be movable up and down;
A lower punch driver that is screwed to be adjustable relative to the upper punch driver;
A punch blade provided integrally or integrally with the lower punch driver;
A keyway provided in the punch guide for restricting relative rotation of the lower punch driver with respect to the punch guide;
A key that engages with the key groove, and is provided on the lower punch driver; and restricts relative fine movement in the radial direction due to a minute clearance of the screwed portion between the upper punch driver and the lower punch driver. Therefore, a first close fitting portion in which the upper punch driver and the punch guide are slidably fitted.
The punch die according to claim 3 further includes:
In order to restrict fine movement of the upper punch driver and the lower punch driver in the relative radial direction due to a minute clearance of the screwed portion, the lower punch driver and the punch guide are slidably fitted. 2 close fitting parts.
The punch mold includes the following:
Cylindrical punch guide;
An upper punch driver provided on the punch guide to be movable up and down;
A lower punch driver that is screwed to be adjustable relative to the upper punch driver;
A punch blade provided integrally or integrally with the lower punch driver;
A keyway provided in the punch guide for restricting relative rotation of the lower punch driver with respect to the punch guide;
A key that engages with the keyway and is provided in the lower punch driver; and restricts relative fine movement in the radial direction due to a minute clearance of the screwed portion between the upper punch driver and the lower punch driver. Therefore, a close fitting part in which the lower punch driver and the punch guide are slidably fitted.