JP2768278B2 - Die holder mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die holder mounting structure in a turret punch press.

[0002]

2. Description of the Related Art Conventionally, in a turret punch press, FIG.
As shown in (2), the die 51 is installed on a lower turret 53 via a die holder 52. That is, the die 51
The die holder 52 is fitted into a die fitting hole (not shown) formed of a stepped hole provided in the die holder 52, and is set with a set screw.
Fixed to The die holder 52 has an inner end in the turret radial direction fixed to an inner end fixing pin 54 projecting from the lower turret 53, and an outer end fixed to the lower turret 53 with a bolt 55 or a cam bolt. .

As shown in FIG. 10, a punch 56 is fixed in a punch holder 57, is inserted into a punch fitting hole 59 of an upper turret 58 so as to be able to move up and down, and is driven up and down by a ram 60 together with the punch holder 57. You. In the illustrated example, the punch holder 57 is forcibly pulled up after punching by engaging the T-shaped head 57a with the T-shaped groove of the ram 60. The punch holder 57 holds the ring-shaped guide plate 6 suspended from the frame 61 at positions other than the ram position.
By engaging the neck of the T-shaped head 57a with 2,
The upper turret 58 is prevented from falling from the punch fitting hole 59. In addition, around the lower turret 53, FIG.
8, a table 63 is provided, on which a work W is placed on a work holder 65 of a work feeding device 64.
And sent in the X and Y directions. Table 63 is
Turret peripheral fixed table 63a, center fixed table 63b, slide table 63c moving in Y-axis direction
Consists of A part of the turret peripheral fixed table 63a is constituted by a detachable table 67, and the die 51 is replaced at a place where the table is removed.

[0004]

It is desirable to remove the die 51 together with the die holder 52 from the lower turret 53 when exchanging the die. However, the bolt 55 for fixing the die holder 52 must be firmly tightened. Since the gap between the upper and lower turrets 58 and 53 is small, the bolt 55 cannot be removed with an ordinary tool. The removal can be performed by using a special dedicated tool, but preparing such a tool increases the setup time. Therefore, usually, the die holder 52 is left in the lower turret 53, and only the die 51 is replaced.
However, the die fitting holes of the die holder 52 are fitted with high precision to the die 51, and the upper and lower turrets 58,
In the work from the narrow gap between 53, the die 51 cannot be fitted into the die fitting hole of the die holder 52. Therefore, the punch holder 57 on the die 51 to be replaced is removed, a tool is inserted into the punch fitting hole 57 of the upper turret 58 from above, and the upper surface of the die 51 is hit from directly above.
Although a slight vibration is applied to fit into the die fitting hole of the die holder 52, the fitting portion is easily damaged. Further, when the die 51 is replaced as described above, it is necessary to remove the punch holder 57, and the die replacement is troublesome.

[0005] In particular, in the conventional example in which the punch holder 57 is forcibly pulled up to ensure the removal from the workpiece W after punching, the punch holder 57 is hung by the guide plate 62. It takes more time to attach and detach the punch holder 57. That is, the guide plate 6
The turrets 53 and 5 are positioned so that the punch holder 57 to be removed is located at a replacement location provided in a part of the circumference in FIG.
8 and the guide plate 62 provided at the replacement location.
It is necessary to remove the punch holder 57 in a state where the detachable portion (not shown) is removed by releasing the bolt. As described above, the replacement of the die 51 requires a cumbersome work of attaching and detaching the punch holder 57, which requires a great deal of labor.

SUMMARY OF THE INVENTION An object of the present invention is to provide a die holder mounting structure capable of easily attaching and detaching a die holder without requiring a special tool.

[0007]

According to a die holder mounting structure of the present invention, guided grooves are provided on both sides of a die holder mounted on a lower turret, and the die holder is engaged with the guided grooves to lower the die holder. Ru der that a guide member for guiding the slidable in and floating lock state in the radial direction of the turret. Also, the outer end of the die holder in the turret radial direction
The lower turret is provided with pin insertion holes that match each other.
From the die holder side to the pin insertion holes.
A positioning pin to be fitted is provided. In the above SL arrangement, the turret radial inner end of the die holder, the engagement edged deletion that opens on the inner diameter side is provided, the upper surface of the peripheral engagement shaft portion engaged with the head of the engaging notches on the engagement notches the inner end fixing pin which engages but it may also be provided on the lower turret.

[0008]

According to this structure, the die holder is supported slidably in the radial direction by the guide member of the lower turret and is prevented from floating, so that the die holder can be pulled out from the lower turret to the outer diameter side. Therefore, the die holder can be easily attached and detached. Thus for attachment and detachment of the die holder is easy, Ru can do die detachable for the die holder in a state of detaching the die holder from the lower turret. Also,
A pin insertion hole is provided in the die holder and lower turret for positioning.
The lower turret guide
Die whose material prevents floating and side displacement
The holder will also be restrained in the sliding direction.
You. Therefore, slide operation and insertion of positioning pin
Only by this, the die holder can be securely fixed. Said engaging edged missing provided da <br/> Ihoruda, the case of providing the inner end fixing pin down turret, when mounting the die holder, U
The die holder may be slid until the U-shaped engagement notch engages with the inner end fixing pin, and positioning of the die holder in the sliding direction can be easily performed. Further, by the engagement between the U-shaped engagement notch Metropolitan inner end fixing pin, that Do ensure lateral fixation of the inner end of the die holder.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 5, a punch holder 4 is fitted in the upper turret 1 in each of the punch fitting holes 3 arranged in the circumferential direction so as to be vertically movable. The punch holder 4 is a forcible pull-up type having a punch (not shown) built therein, and has a T-shaped head 4a which engages with a ram and a guide plate (not shown). A die holder 6 holding a die 5 is provided on the upper surface of the lower turret 2 via a die base 7. The die base 7 becomes a part of the lower turret 2. The die holder 6 is slidably supported by engaging a guide member 9 having an inverted L-shaped cross section with a guided groove 8 provided on both side surfaces, and locking the inner end with an inner end fixing pin 10.
The outer end is locked by a positioning pin 11. FIG. 5 shows a schematic configuration of a die holder mounting structure. FIG. 1 to FIG. 4 show specific examples of the die holder mounting structure, FIG. 6 shows a second example, and FIG. Are shown in FIG. In each of the embodiments, parts corresponding to each other are denoted by the same reference numerals.

In FIG. 1, the die holder 6 has a substantially fan-shaped planar shape, and is provided with a circular die fitting hole 13 for fitting the die 5 in the center. The die fitting hole 13 is
The introduction portion 1a is formed in a stepped hole formed by the introduction portion 13a on the opening side and the fitting portion 13b on the bottom side, and the introduction portion 1a has a slightly larger diameter (for example, about 0.04 mm) than the fitting portion 13b. Further, a through hole 14 for discharging slag is provided on the bottom surface of the die fitting hole 13, and the die 5 is fitted into the fitting portion 13 b of the die fitting hole 13 to form a step between the die hole and the through hole 14. Placed on the bottom
Set screw 1 in a screw hole penetrating from the side of die holder 6
5 fixed. At a position near the inner end of the upper surface of the die holder 6 in the width direction center, a free bearing 19 for guiding the work is embedded and installed. Die base 7
Is a plate-like member having the same planar shape as the die holder 6, and is fixed to the upper surface of the lower turret 2 by bolts (not shown) or welding. The die base 7 has a through hole 16 communicating with the through hole 14 of the die holder 6.

The die holder 6 has an inner end engaging piece 17 protruding at the center of the narrow end on the inner side of the turret, and a U-shaped engaging notch 18 is provided at the tip. The engagement notch 18 is tapered on the opening side. Notch 1
Numeral 8 designates a fitting to the shaft portion of the inner end fixing pin 10 of the die base 7, and the enlarged head 1 of the inner end fixing pin 10.
0 a engages with the upper surface of the inner end engaging piece 17. The tip of the shaft portion of the inner end fixing pin 10 is formed into a male screw, penetrates through the die base 7, and is fixed to a nut from below. The guide grooves 8 on both side surfaces of the die holder 6 are formed parallel to each other. The outer end of the guide groove 8 on the outer side of the die holder is terminated halfway, and the inner end is open to the end face of the die holder 6. The guide member 9 fitted into the guide groove 8 extends from the vicinity of the center of the die holder 6 to the outer end side, and is fixed to the upper surface of the die base 7 with bolts 22 from the back surface side.

As shown in FIG. 3, the positioning pin 11 is formed as a stepped shaft having a head 11a, and a free bearing 24 for guiding the work W is embedded on the upper surface of the head 11a. A flange 11c is formed on the upper edge of the head 11a, and an engagement groove 11d is formed on the outer periphery of the lower portion.
The positioning pin 11 has a pin-shaped stopper piece 25 protruding toward the outer diameter side protruding from the lower end of the head 1a, and a pin elastically protruding toward the outer diameter side in the middle of the shaft portion 11b. A fall prevention component 26 is embedded. The pin drop-in prevention component 26 is formed of a ball plunger or the like in which a ball for engagement is urged by a built-in spring. In addition, of the two positioning pins 11, one of the positioning pins 11 has a lower portion of the shaft portion 11b formed by four flat portions 11e formed side by side on the peripheral surface so as to have an angular shape as shown in FIG. It has a round diamond-shaped cross section.

As shown in FIG. 1, two pin insertion holes 20 for inserting the positioning pins 11 of the die holder 6 are provided on both sides near the outer end, respectively. Are provided through the die base 7. The pin insertion hole 20 on the die holder 6 side is formed as a countersunk hole that fits from the head 11a of the positioning pin 11 to the upper part of the shaft 11b. Pin insertion hole 2
0 and the pin insertion hole 23 of the die base 7
Sleeves 27 and 28 that fit into holes provided in the die holder 6 and the die base 7 are respectively formed by inner diameter surfaces. A circumferential groove-shaped portion formed between the upper and lower sleeves 27 and 28 serves as an engaging portion 29 (FIG. 2) with which the pin drop prevention component 26 of the positioning pin 11 engages. The engagement portion 29 engages with the positioning pin 11 completely inserted into the pin insertion hole 20. Apart from the engaging portion 29, the pin drop prevention component 26 is provided at a predetermined floating height (FIG. 2B) at which the positioning pin 11 comes out of the pin insertion hole 23 of the die base 7.
Are formed on the bottom surface of the counterbored portion in the pin insertion hole 20 of the die holder 6. Specifically, the stopper engagement portion 30 is formed by the upper end surface of the sleeve 27.

An elastic engaging part 31 which is elastically protruded from the inner surface of the counterbore in the pin insertion hole 20 of the die holder 6 and engages with the engaging groove 11d on the outer periphery of the head of the positioning pin 11 is embedded. Is provided. This elastic locking part 31 is also formed of a ball deplunger or the like in which a ball for engagement is projected and urged by a built-in spring. Also, die holder 6
In the counterbore portion of the pin insertion hole 20, a slit-shaped relief opening 3 for releasing the retaining piece 25 of the positioning pin 11 is provided.
The opening 2 is formed in the end face on the outer end side of the die holder 6 and is formed in a vertically long shape. The upper end of the relief opening 32 serves as a retaining piece engaging portion 32a in which the retaining piece 25 is engaged with the lower surface at a predetermined floating height of the positioning pin 11.

A description will now be given of the operation of exchanging dies with the above configuration. When exchanging the die 5, the die holder 6 is removed from the die base 7 of the lower turret 2, and the die 5 is exchanged from the die holder 6 outside the machine. As described above, the diameter of the die fitting hole 13 of the die holder 6 is slightly larger in the introduction portion 13a than in the fitting portion 13b, so that the die 5 can be easily fitted. The die holder 6 after the exchange of the die 5 is mounted on the die base 7 of the lower turret 2 again. At this time, die base 7
Are provided on both sides thereof. Guide grooves 9 on both sides of the die holder 6 are engaged with the guide members 9 so that the turret can be moved from the outer diameter side to the inner diameter side on the die base 7. Can be attached by sliding. By sliding in this manner, the U-shaped engagement notch 18 of the die holder 6 is engaged with the inner end fixing pin 10 of the die base 7, and the die holder 6 is positioned in the turret radial direction.

After the slide, the positioning pin 11 is inserted from the pin insertion hole 20 of the die holder 6 to the pin insertion hole 23 of the die base 7 to complete the work of mounting the die holder 6. In this state, the die holder 6 is prevented from rising from the center to the outer end by the pair of guide members 9 on the die base 7, and the inner end fixing pin 10 is prevented.
Of the inner end is prevented by the head 10a.
Also, the inner end fixing pin 10 engages with the U-shaped engagement notch 18 of the die holder 6 and the positioning pin 11
The die holder 6 is prevented from moving in the turret radial direction by engaging with the pin insertion holes 20 and 23 of the die base 7. The die holder 6 is restrained in the lateral direction by pinching by the guide members 9 on both sides, engagement of the positioning pin 11, engagement of the inner end fixing pin 10 with the U-shaped engagement notch 18, and the like. . For these reasons, the die holder 6 can be reliably fixed only by inserting the positioning pins 11.

The positioning pin 11 holds the head 1 in the inserted state.
The pin insertion hole 20 is formed in the engagement groove 11d provided on the outer circumference of
Since the inner elastic locking parts 31 are elastically engaged with each other, they are maintained at a predetermined insertion depth without being unexpectedly lifted by vibration or the like. To release the holding state of the positioning pins 11 when the die holder 6 is detached or the like, the die holder 6
Insert a tool such as a screwdriver into the slit-shaped relief opening 32 from the outside of the
It can be lifted upward by using. In this lifted state, as shown in FIG. 2 (B), the pin drop prevention component 26 elastically protruding from the positioning pin 11 engages with the stopper engagement portion 30 of the pin insertion hole 20, so that the lifted state is achieved. Will be retained. Therefore, there is no need to support the positioning pin 11 so that it does not fall. When the positioning pin 11 is inserted, the pin drop prevention component 26 is
, It also functions to prevent the positioning pin 11 from coming off. A retaining piece 25 protrudes from the positioning pin 11 and engages with the retaining piece engaging portion 32a at the upper end of the escape opening 32 of the die holder 6 in the above-mentioned raised state, so that it does not come off any more. Therefore, loss of the positioning pin 11 is prevented.

As shown in FIG. 4, the lower portion of one of the positioning pins 11 is provided with a flat portion 11e and has a rhombic cross-sectional shape. Direction). Therefore, high precision is not required for the pitch L of the pin insertion holes 23, 23 with respect to the two positioning pins 11, and the insertion of the positioning pins 11 does not take place excessively. The other positioning pin 11 is a perfect circle to prevent the rotation of the die holder 6 in the turret circumferential direction.

According to the die holder mounting structure, the die holder 6 can be attached to and detached from the lower turret 2 only by sliding the die holder 6 and inserting and removing the positioning pins 11. Therefore, even if the gap between the upper and lower turrets 1 and 2 is narrow, the die holder 6 can be used without using a special tool.
Can be easily attached and detached. As a result, the die 5 can be exchanged for the die holder 6 outside the machine,
Can be easily replaced. Therefore, it is not necessary to remove the punch holder 4 from the upper turret 1 at the time of die exchange, and the die exchange work is greatly facilitated. The positioning pin 11 has a free bearing 2 for moving the work.
4, the free bearing 24 is provided on the die holder 6.
It is not necessary to take a separate space for arranging the free bearings 24, and a margin for arranging the free bearings 24 can be obtained.

FIG. 6 shows a second embodiment. In this example, two die fitting holes 13 are formed near the center and on the inner end side so that two small dies 5 are arranged in the die holder 6 side by side. Further, on the upper surface of the die holder 6, two tables 35 and 36 for work guidance are provided separately on the inner end side and the outer side. The outer end side table 36 has a positioning pin 1
1 and is attached to and detached from the die holder 6 together with the positioning pins 11. In this example, positioning pin 1
1 is one position, and the positioning pin 11 of the above embodiment is used.
Is not provided. The lower part of the positioning pin 11 is a perfect circle. The guide grooves 8 are open to both end surfaces of the die holder 6. Other configurations are the same as those in the above embodiment.

FIG. 7 shows a third embodiment. In this example, two free bearings 19, 19 are provided on both sides of the inner end of the die holder 6 instead of the single free bearing 19 provided at the inner end of the die holder 6 in the embodiment of FIG. It is a thing. Other configurations are the same as those of the embodiment of FIG.

[0022]

According to the die holder mounting structure of the present invention, guided grooves are provided on both sides of the die holder placed on the lower turret, and the die holder is engaged with the guided grooves and the die holder is moved in the radial direction of the lower turret. Since the guide member is provided so as to be slidable and to be prevented from floating, the die holder can be easily attached and detached without requiring a special tool. As a result, the die can be replaced with the die holder removed from the lower turret. The turret radius of the die holder
Pin insertion holes aligned with the outer end of
Provided, and extend from the die holder side to the two pin insertion holes.
Positioning pin that fits
A guide member to prevent lifting easily
Very easy to attach and detach die holders
Can be done. 請 Motomeko For 2 of the invention is the turret radial inner end of the die holder, the engagement edged deletion that opens on the inner diameter side is provided, the head and shaft portion engaged with the engagement notches is the engagement Since the lower end turret is provided with an inner end fixing pin that engages with the upper surface around the notch, positioning can be performed only by sliding the die holder until the die holder comes into contact with the inner end fixing pin. Moreover, the engagement of the engaging notch, that Do ensured also restrained in the lateral direction inner end of the die holder.

[Brief description of the drawings]

1A is a plan view of a die holder mounting structure according to an embodiment of the present invention, FIG. 1B is a cutaway side view, and FIG. 1C is a cutaway front view.

FIG. 2 is an operation explanatory view of the positioning pin.

FIG. 3 is a side view of the positioning pin.

FIG. 4 is an operation explanatory view showing a relationship between a positioning pin, a pin insertion hole thereof, an inner end fixing pin, and the like.

FIG. 5 is a schematic perspective view showing a turret portion of a turret punch press to which the die holder mounting structure is applied.

FIG. 6A is a plan view of a die holder mounting structure according to a second embodiment of the present invention, FIG.
(C) is the same front view.

FIG. 7 is a plan view of a die holder mounting structure according to a third embodiment of the present invention.

FIG. 8 is a cutaway plan view showing a schematic configuration of a conventional turret punch press.

FIG. 9 is a partial perspective view of the turret part.

FIG. 10 is a cutaway side view of the turret.

[Explanation of symbols]

1 upper turret, 2 lower turret, 4 punch holder,
5: die, 6: die holder, 7: die base, 8: guided groove, 9: guide member, 10: inner end fixing pin, 10a ...
Head, 11 positioning pin, 11a head, 11d engaging groove, 13 die fitting hole, 13a introduction part, 13b fitting part, 14 through hole, 15 set screw, 17 inside End engaging piece, 18 ... engaging notch, 19 ... free bearing, 20 ...
Pin insertion hole, 23: pin insertion hole, 24: free bearing, 25: retaining piece, 26: pin drop prevention part, 29
... engagement part, 30 ... fall prevention engagement part, 31 ... elastic locking parts,
32: escape opening, 32a: retaining piece engaging portion

Claims (2)

(57) [Claims] 1. A guided groove is provided on both sides of a die holder mounted on a lower turret, and the die holder is slidable in the radial direction of the lower turret by engaging with the guided groove and is prevented from rising. set the guide to the guide member to,
Outer end of turret radial direction of die holder and lower turret
Are provided with pin insertion holes which are aligned with each other.
Positioning to fit over both pin insertion holes from the rudder side
Da Ihoruda mounting structure in which a fit pin. 2. An engaging notch opened on the inner diameter side is provided at an inner end of the die holder in a turret radial direction, and a shaft portion is engaged in the engaging notch so that a head is formed around the engaging notch. The die holder mounting structure according to claim 1, wherein an inner end fixing pin engaging with the upper surface is provided on the lower turret.