JP2002113532A - Die holder fitting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a die holder fitting structure capable of fitting a die holder on a die holder supporting member such as a turret in a freely position- adjustable manner without degrading rigidity of the die holder supporting member. SOLUTION: An aligning plate 4 is fitted on the die holder supporting member comprising the turret or the like in a freely position-adjustable manner. The die holder 2 is placed across the die holder supporting member 1 and a top surface of the aligning plate 4. This die holder 2 is fitted to the aligning plate 4 by a fitting pin 10 in a position-regulating manner.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a die holder mounting structure in a punch press.

[0002]

2. Description of the Related Art Conventionally, in a turret punch press,
To attach the die holder to the lower turret, as shown in FIGS.
2 is provided with a centering plate 53,
Is known (Japanese Patent No. 2881928). Alignment plate 53
Is fixed to the concave portion 52 of the lower turret 51 by a bolt or the like so that the position of the die holder 54 can be adjusted.

[0003]

However, in the above configuration, the area of the concave portion 52 for setting the centering plate in the lower turret 51 becomes large, the turret thickness at that portion becomes thin, and the rigidity of the lower turret 51 becomes small. descend. As a result, the lower turret 51 is easily bent, which adversely affects the processing accuracy.

An object of the present invention is to provide a die holder mounting structure which can mount a die holder on a die holder supporting member via a centering plate whose position can be adjusted without lowering the rigidity of the die holder supporting member. .

[0005]

A die holder mounting structure according to the present invention includes a die holder supporting member, an alignment plate mounted on the die holder supporting member so as to be adjustable in position, and
The die holder support member and a die holder that is placed so as to straddle the upper surface of the centering plate, and mounting means for mounting the die holder in a position-restricted state with respect to the centering plate. The die holder supporting member is, for example, a turret or a cartridge. According to this configuration, the position of the alignment plate with respect to the die holder support member is adjusted, and the die holder is mounted on the alignment plate whose position has been adjusted by the mounting means, whereby the die holder is aligned with the die holder support member. Attached to In this case, since the die holder is mounted so as to straddle the die holder supporting member and the upper surface of the alignment plate, the alignment plate only needs to be a part of the die holder. Therefore, the recessed area for the arrangement of the centering plate in the die holder supporting member can be reduced, and the rigidity of the holder supporting member increases accordingly, and the processing accuracy of the punch press can be maintained high.

In the present invention, a U-shaped engagement notch is provided at the end of the die holder opposite to the mounting portion on the alignment plate, and a positioning pin engaged with the engagement notch is provided on the die holder supporting member. May be provided. In the case of this configuration, the entire die holder is fixed by engaging the U-shaped engagement notch provided in the die holder with the positioning pin and mounting the die holder on the alignment plate by the mounting means. Since the U-shaped engagement notch and the pin are engaged with each other, a simple engagement operation is required. Even if the mounting position of one end of the die holder is changed by adjusting the position of the alignment plate, the engaged state can be obtained. Therefore, while enabling the position adjustment of the die holder,
The die holder can be easily attached. When the U-shaped engagement notch is provided as described above, the positioning pin is rotatably attached to the attachment hole of the die holder support member, and a portion that engages with the engagement notch is positioned with respect to the attachment hole. The eccentric portion may be eccentric, and the diameter of the eccentric portion may be set to a size that fits into the U-shaped engagement notch. In the case of this configuration, since the U-shaped engagement notch of the die holder is engaged with the eccentric portion of the positioning pin, by rotating the positioning pin to change the eccentric direction, a portion that engages with the positioning pin of the die holder is formed. , In the holder width direction. Therefore, the position adjustment in the holder width direction can be easily adjusted by adjusting the rotation angle of the positioning pin.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. 1A and 1B are a plan view and a vertical sectional view showing a die holder mounting structure according to this embodiment. The punch press to which the die holder mounting structure is applied is of a turret type, and the die holder supporting member 1 is formed of a turret that is rotatable around a vertical axis. Above the die holder supporting member 1 made of a turret, a punch holder supporting member (not shown) made of a coaxial upper turret is installed. A plurality of die holders 2 are arranged on the outer periphery of the die holder supporting member 1 made of a turret.

The die holder 2 is a member for holding the die 3 and is placed over the die holder supporting member 1 and the upper surface of the centering plate 4 mounted on the die holder supporting member 1. The centering plate 4 is disposed in a recess 1 a formed on the upper surface of the die holder supporting member 1 so that the upper surface thereof is flush with the upper surface of the die holder supporting member 1. It is mounted so that the fine adjustment of is possible. That is, the die holder supporting member 1 is provided with a plurality of bolt insertion holes 6 penetrating from the lower surface thereof into the recessed portions 1 a. And tighten it. At this time, the mounting position of the alignment plate 4 can be adjusted by the difference between the inner diameter of the bolt insertion hole 6 and the outer diameter of the bolt 5. The bolt head 5 a of the bolt 5 is engaged with a counterbore of the bolt insertion hole 6.

The centering plate 4 is provided with a pin insertion hole 7 therethrough as shown in FIG. In the illustrated example, the centering plate 4 is a plate having a substantially hexagonal planar shape. The pin insertion hole 7 is provided at the center, and U
A letter-shaped engagement notch 8 is provided. These engagement notches 8
Is for temporarily fixing the aligning plate 4 to the concave portion 1a of the die holder supporting member 1 with the temporary fixing pin 9, and the inner width of the engagement notch 8 is sufficient for the outer diameter of the temporary fixing pin 9. Dimensions that can afford. A counterbore 8a for immersing the head 9a of the temporary fixing pin 9 in the upper opening of the engagement notch 8.
Are formed. FIG. 3 shows a state in which the centering plate 4 is temporarily fixed to the concave portion 1a by screwing the temporary fixing pin 9 engaged with the engaging notch 8 into the concave portion 1a of the die holder supporting member 1. In this temporarily fixed state, the bolts 5 are screwed from below to fix the alignment plate 4.

The die holder 2 has its outer end in the turret radial direction, that is, the mounting portion on the aligning plate 4 attached to the aligning plate 4 in a position-restricted state by an attaching pin 10 serving as an attaching means. The inner end, that is, the end opposite to the mounting portion on the alignment plate 4 is a positioning pin 1 with a head.
1 locks on the die holder support member 1.

That is, at the outer end of the die holder 2, a pin insertion hole 12 matching the pin insertion hole 7 of the alignment plate 4 is provided.
The mounting pin 10 is fitted over the pin insertion hole 12 and the pin insertion hole 7 of the alignment plate 4. A counterbore 1 into which the head 10a of the mounting pin 10 fits is provided in the upper opening of the pin insertion hole 12 in the die holder 2.
3 is formed in a substantially U-shaped notch in a plan view opening to the outer end side of the die holder. U inside the die holder 2
An engagement notch 14 having a U-shape is provided, and the opening side of the engagement notch 14 is tapered. The engagement notch 14 is engaged with a positioning pin 11 rotatably mounted in the mounting hole 15 of the die holder supporting member 1. The lower shaft portion of the positioning pin 11 is a male screw portion 11a. The positioning pin 11 is rotatably attached to the die holder support member 1 by screwing the male screw portion 11a into an attachment hole 15 formed by a screw hole of the die holder support member 1.
The positioning pin 11 is provided with the notch 1 of the die holder 2.
The upper shaft portion that engages with 4 is an eccentric portion 11b that is eccentric with respect to the mounting hole 15, and the diameter of the eccentric portion 11b is set to a size that fits into the inner width of the engagement notch 14. The depth of the engagement notch 14 is such that the positioning pin 11 does not hit the U-shaped bottom.

As shown in FIG. 1 (A), the die holder 2 has a substantially fan-shaped planar shape, and a circular die fitting hole 16 for fitting the die 3 is provided at a substantially central portion thereof. . A through hole 1 for discharging slag is provided on the bottom of the die fitting hole 16.
7 is provided. The die 3 is fitted on the die fitting hole 16 and is mounted on the bottom surface which is a step between the through hole 17 and a set screw (not shown) in a screw hole penetrating from the side surface of the die holder 2. Fixed.

On the upper surface of the die holder 2, a table 18 for placing and guiding a work is provided on the die holder supporting member 1.
Table 18A, 18B divided into two in the radial direction
The partial table 18A on the inner diameter side is directly fixed to the upper surface of the die holder 2 with bolts or the like (not shown). On the upper surface of the partial table 18A, a rotatable transport ball 20 provided in the die holder 2 together with the bearing case 19 is provided. The partial table 18B on the outer diameter side includes the head 10 of the mounting pin 10.
a is attached via a thick plate-shaped spacer 21. The spacer 21 is attached to the lower surface of the partial table 18B with the mounting screw 22 inserted from the lower surface thereof, and the mounting screw 2 penetrating the head 10a of the mounting pin 10 from below.
3 is attached to the mounting pin head 10a. A transport ball 20 is provided on the upper surface of the partial table 18B at a position concentric with the mounting pin 10 so as to be embedded together with the bearing case.

FIG. 4 shows a schematic cross section of a fluid type expanding / contracting means 24 for enlarging and contracting the mounting pin 10. As shown in the figure, the shaft portion 10b of the mounting pin 10 has a cylindrical sealing chamber 24a formed near the outer peripheral surface, and the outer periphery of the sealing chamber 24a is an outer peripheral sleeve portion 10ba. A female screw portion 2 opened on the outer diameter surface of the mounting pin head 10a is provided in the sealing chamber 24a.
5, and a pressure medium 26 made of a liquid such as oil is sealed. A pressure applying screw 27 is screwed into the female screw portion 25. By screwing in the pressure applying screw 27, the pressure medium 26 is pressurized and the outer peripheral sleeve portion 10ba
From the inside to expand the diameter of the shaft portion 10b of the mounting pin 10. When the pressure applying screw 27 is loosened, the shaft portion 10b is reduced in diameter by the elasticity of the outer peripheral sleeve portion 10ba.

The operation of exchanging dies in the above-structured die holder mounting structure will be described. When exchanging the die 3, the die holder 2 is detached from the die holder supporting member 1 and the alignment plate 4, and the die 3 is exchanged from the die holder 2 outside the machine. The die holder 2 after the exchange of the die 3 is mounted again with the outer end thereof placed on the centering plate 4 and the remaining part excluding the outer end placed on the die holder supporting member 1. When installing this
The die holder 2 engages the U-shaped engagement notch 14 with the positioning pin 11 of the die holder supporting member 1, and then inserts the mounting pin 10 between the die holder 2 and the pin insertion holes 12 and 7 of the centering plate 4. I do.

After the mounting pin 10 is inserted into the pin insertion holes 12 and 7, the diameter of the shaft portion 10b is increased by screwing in the pressure applying screw 27. As a result, the shaft portion 10b is provided with the pin insertion holes 12, 7 of the die holder 2 and the alignment plate 4.
Is press-fitted to the inner diameter surface, and is firmly fixed to the die holder 2 and the centering plate 4 to prevent it from coming off in the axial direction.

The position adjustment of the die holder 2 is performed as follows. With the die holder 2 removed, each bolt 5 fixing the alignment plate 4 to the die holder supporting member 1
By loosening, the position of the centering plate 4 can be adjusted within the range of play between the bolt 5 and the bolt insertion hole 6. In this state, the position of the aligning plate 4 is fixed by adjusting the position of the aligning plate 4 and tightening the bolts 5 again. There is no play between the mounting pin 10 and the centering plate 4 and between the pin insertion holes 7 and 12 of the die holder 2 in the pin expanded state, and the die holder 2 is positioned relative to the adjusted position of the centering plate 4. The position of one end of is determined. The inner end of the die holder 2 can be adjusted by turning the positioning pin 11 and swinging the eccentric portion 11b right and left. That is, by shaking the eccentric part 11b right and left,
The die holder 2 engaged with the eccentric portion 11b with a U-shaped engagement notch without a gap swings right and left around the mounting pin 10 at the other end as the swing center. With this swing,
The position of the die holder 2 in the width direction can be adjusted.

According to the die holder support structure, the die holder 2 is not placed on the alignment plate 4 but over the die holder support member 1 and the upper surface of the alignment plate 4. The concave portion 1a of the die holder supporting member 1 on which the alignment plate 4 is disposed
Can be reduced. Therefore, the rigidity of the die holder supporting member 1 can be increased, and as a result, the processing accuracy is improved.

FIG. 5 is a plan view showing another embodiment of the die holder mounting structure. This embodiment is an example in which the diameter of the die 3 is larger than that of the previous embodiment, and accordingly, the die holder 2 is made wider. In this example, one corner of the outer end of the die holder 2 is aligned with the centering plate 4.
And the other part of the die holder 2 is placed on the die holder supporting member 1. Other configurations are the same as those of the previous embodiment. In the case of this configuration, even if the die holder 2 becomes large, the centering plate 4 can be of substantially the same size as that of the previous embodiment, so that the die holder supporting member 1 on which the centering plate 4 is arranged is provided.
It is not necessary to increase the size of the concave portion 1a, and the rigidity of the die holder supporting member 1 can be prevented from lowering. As a result, high processing accuracy can be maintained.

In each of the above embodiments, the case of the turret punch press has been described. However, the present invention can be similarly applied to a cartridge type punch press.

[0021]

The die holder mounting structure of the present invention comprises a die holder supporting member, a centering plate mounted on the die holder supporting member so as to be adjustable in position, and straddling the upper surfaces of the die holder supporting member and the centering plate. Since the die holder to be mounted and the mounting means for mounting the die holder to the centering plate in a position-restricted state are provided, the recessed area for the centering plate provided on the holder supporting member can be reduced, and the holder support is accordingly reduced. The rigidity of the member is increased, and the processing accuracy of the punch press can be maintained high. If a U-shaped engagement notch is provided at the end of the die holder opposite to the mounting portion on the alignment plate, and a positioning pin that engages with the engagement notch is provided on the die holder support member, the die holder support The end side of the die holder mounted directly on the member can freely follow the alignment of the alignment plate. The positioning pin is rotatably mounted in the mounting hole of the die holder support member, and a portion that engages with the engagement notch is an eccentric portion that is eccentric with respect to the mounting hole. When the size is such that it fits into the U-shaped engagement notch, the position of the die holder in the width direction can be adjusted by rotating the positioning pin.

[Brief description of the drawings]

FIG. 1A is a plan view of a die holder mounting structure according to an embodiment of the present invention, and FIG. 1B is a longitudinal sectional view of the die holder mounting structure.

FIG. 2 is a plan view of an alignment plate in the die holder mounting structure.

FIG. 3 is a longitudinal sectional view showing a temporary fixing state of the alignment plate in the die holder mounting structure.

FIG. 4 is a sectional view showing a configuration of a mounting pin in the die holder mounting structure.

FIG. 5 is a plan view of a die holder mounting structure according to another embodiment of the present invention.

FIG. 6 is a longitudinal sectional view of a conventional example.

FIG. 7 is a partial perspective view of the conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Die holder support member 2 ... Die holder 4 ... Alignment plate 10 ... Mounting pin (mounting means) 11 ... Positioning pin 11b ... Eccentric part 14 ... Engagement notch 15 ... Mounting hole

Claims (3)

[Claims] A die holder supporting member, an aligning plate mounted on the die holder supporting member so as to be position-adjustable, a die holder mounted on the die holder supporting member and an upper surface of the aligning plate, Mounting means for mounting the die holder to the centering plate in a position-restricted state. 2. A U-shaped engaging notch is provided at an end of the die holder opposite to the mounting portion on the centering plate, and a positioning pin engaging with the engaging notch is provided on the die holder supporting member. The die holder mounting structure according to claim 1. 3. The locating pin is rotatably mounted in a mounting hole of a die holder supporting member, and a portion engaging with the engaging notch is an eccentric portion which is eccentric with respect to the mounting hole. The die holder mounting structure according to claim 2, wherein a diameter of the portion is set to a size that fits into the U-shaped engagement notch.