JP3165037B2 - Die device and spacer used for this device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention relates to a spacer used in a die device used when bending a work in cooperation with an upper die (punch).

[0002]

2. Description of the Related Art Conventionally, as schematically shown in FIG. 6, for example, a press brake (the whole structure is not shown) is provided with an upper table 101 and a lower table 103 which are vertically opposed to each other. Or lower table 10
An appropriate one of the three is configured as a movable table that can move up and down.

[0003] A fixing device 105 is provided on the upper table 101.
A punch (upper die) 107 is detachably attached through a die holder.
A die (lower die) 111 is detachably mounted via a 09.

After the work W is set on the die 111, the first V groove 113A provided on the upper surface of the die 111 is formed.
The work W is bent in a V-shape by engaging the lower end portion of the punch 107 with the work.

The second groove 113B of the die 111 may be used without changing the punch 107 due to the difference in the thickness and material of the work W.

In the case described above, the plurality of tightening bolts 115 screwed to a plurality of locations in the longitudinal direction on the lower surface of the die 111 are loosened, the die 111 is removed from the die holder 109, and the die 111 is turned upside down. After aligning with the punch 107, the plurality of tightening bolts 115 are tightened again.

[0007] Therefore, when the die 111 is to be inverted and attached and detached, a large number of tightening bolts 115 must be operated, and the work of attaching and detaching and replacing the die 111 is troublesome.

In order to solve the above-mentioned conventional problems, Japanese Utility Model Laid-Open No. 54-2739 and Japanese Unexamined Patent Publication No.
A configuration such as that disclosed in JP-A-148529 is known.

For example, as shown in FIG.
A die base 117 is interposed between the die base 11 and the die holder 109, a plurality of tightening bolts 115 are provided on the lower surface of the die base 117, and a longitudinal direction is provided at the center of the upper surface of the die base 117 in the width direction (left-right direction in FIG. 7). A guide portion 119 extending in a direction (a direction perpendicular to the paper surface in FIG. 7) is provided to protrude. An engaging groove 121 is provided on the lower surface of the die 111 so as to be detachable from the guide portion 119 over the entire length in the longitudinal direction.

The dimension A from the center of the first V groove 113A to one side of the engagement groove 121 and the dimension B from the center of the second V groove 113B to the other side of the engagement groove 121 are provided equally. Since the die 111 is positioned with reference to one side surface of the guide portion 119, the first V-groove 113A
Is aligned with the punch 107, and the die base 117 is fixed to the die holder 109.

After the die base 117 is fixed to the die holder 109, the guide portion 1 of the die base 117 is fixed.
19 and the engagement groove 121 of the die 111 is released,
The die 111 is removed from the die base 117, and the die 11
When the engagement groove 121 is re-engaged with the guide portion 119 by reversing the front and rear of the first V groove 113B, the second V groove 113B is aligned with the punch 107.

That is, according to the configuration shown in FIG.
After the positioning of the die base 117 with respect to the die holder 109, the die 111 is attached to and detached from the die base 117.
The second V-grooves 113A and 113B are positioned so as to be aligned with the punch 107, and the conventional problem as described above is solved.

[0013]

By the way, in the above-described conventional structure shown in FIG. 7, one side surface of the guide portion 119 which is long in the left-right direction (longitudinal direction) is used as a reference surface and the engagement groove 1 is used.
Since the two side surfaces of the die 21 are used as reference surfaces, if the die 111 is slightly distorted in the front-rear direction due to, for example, heat treatment or the like, the guide portion 119 and the engagement groove 121 of the die 111 are engaged over the entire length. May be unable to do so.

One side of the guide 119 serving as a reference surface must be machined at a right angle with high precision over the entire length of the upper surface of the die base 117.
Both side surfaces serving as reference surfaces must be machined at a right angle with high precision over the entire length and the lower surface of the die 111.
There is a problem that high-precision machining of each reference plane is troublesome, and the production cost is increased due to the accuracy.

An object of the present invention is to easily and accurately position and fix a die when the die is detached and replaced.
An object of the present invention is to provide a die device and a spacer used in the die device, in which the positioning accuracy is improved as compared with the related art, and the processing groove provided on the upper surface of the die can be easily aligned with the punch.

[0016]

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, the present invention relates to a method in which a front and rear first and second processing grooves are formed on the upper surface in the left-right direction to engage with the lower surface of the die in the left-right direction. Providing a groove portion, equally providing a distance between the front and rear surfaces of the engagement groove portion and the centers of the first and second processing grooves, and providing an engagement positioning projection portion before and after the engagement groove portion; A die base having front and rear engagement positioning protrusions, each having an inclined surface inclined in the front-rear direction at the front and rear edges of the lower part of the die, and having a protrusion engageable with an engagement groove of the die on an upper surface. On the upper surface, front and rear engagement positioning grooves that are freely engageable with the engagement positioning protrusions are provided, and before and after the front and rear engagement positioning grooves, abut on the inclined surface of the die to be centered in the front-rear direction. This is a configuration in which an inclined surface for guiding is provided.

[0017]

[0018]

[0019]

[0020]

[0021]

[0022]

[0023]

[0024]

[0025]

[0026]

[0027]

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, FIG. 2 and FIG. 3, the press brake (the overall configuration is not shown)
And the lower table 3 are vertically opposed to each other, and are configured as a vertically movable movable table of one of the upper table 1 and the lower table 3.

A punch 7 is removably mounted on the upper table 1 via a fixture 5, and a die holder 9 is provided on the lower table 3. A die 13 is detachably mounted on the die holder 9 via a die base 11.

The die base 11 is extended in the left-right direction, and T-grooves are formed at a plurality of appropriate positions in the left-right direction, and a mounting portion 15 is provided in each of the T-grooves. The mounting portion 15 is attached to the die holder 9 by a washer 17 that can be freely locked in the T-slot and a tightening bolt 19 that can freely tighten the washer 17.

As shown in FIGS. 2 and 3, the die base 11 has a projection 21 as a receiving portion extending in the left-right direction substantially at the center in the front-rear direction. Engagement positioning grooves 23A, 2 extending in the left-right direction are provided on the front and rear portions of the protrusion 21.
3B is formed. The engagement positioning grooves 23A,
23B has almost the same shape.

As shown in FIGS. 1 and 2, a front end P of the punch P
_A first V-groove 25A and a second V-groove as processing grooves freely engageable with _A
A groove 25B is provided. Further, an engagement groove 27 as a non-accepting portion to be received by the projection 21 as the receiving portion is provided at a lower portion of the die 13, and the engagement positioning portion is provided before and after the engagement groove 27. Groove 23
A, 23B and engagement positioning projections 29A, 2
9B is formed.

As shown in FIG. 1, the distances A and B between the front and rear surfaces of the engaging groove 27 and the centers C ₁ and C _{2 of} the first and second V-shaped grooves 25A and 25B are determined. They are equal (A = B). In the state shown in FIG. 1, the punch P is provided in advance so that the tip P _A of the punch P and the center C _{1 of the first} V groove 25A coincide with each other.

With the above configuration, when setting the die 13 on the die base 11, the operator holds the die 13 and lowers it on the die base 11 from above. At that time, die 13
Are engaged with the projections 21 of the die base 11 and the engagement positioning projections 29A, 29
B are the engagement positioning grooves 23 of the die base 13 respectively.
The die 13 is positioned and fixed on the die base 11 by being engaged with A, 23B. As a result, it is possible to perform positioning with higher precision than in the past.

In the state shown in FIG. 1, the tip P _A of the punch P and the first V
Because it is pre-centered with the center C ₁ of the groove 25A,
There is no need to re-center. The die 13 is removed from the die base 11, and the die 13 is turned back and forth, and the engagement positioning protrusions 2 are inserted into the engagement positioning grooves 23A and 23B.
9B, even when the allowed engaging 29A, because there is a distance A and B shown in FIG. 1 are equal (A = B), and the center C ₂ of the tip P _A and the 2V groove 25B of the punch P Since the centering of the two coincides, there is no need to perform the centering again.

In the above example, an engagement positioning projection may be provided on the upper surface of the die base 11, and an engagement positioning groove may be provided on the lower surface of the die 13 for engagement. In addition, since the die 13 is movable on the die base 11 in the left-right direction, it is particularly effective for positioning and fixing a plurality of split dies.

FIG. 4 shows an example in which a spacer 31 is interposed between the die base 11 and the die 13. 4, the same components as those in FIGS. 1, 2, and 3 are denoted by the same reference numerals, and detailed description is omitted.

In FIG. 4, on the upper surface of the spacer 31,
A protrusion 33 having substantially the same shape as the protrusion 21 as a receiving portion provided on the upper surface of the die base 11 is provided, and an engagement positioning groove 35A, which has substantially the same shape as the engagement positioning grooves 23A and 23B, is provided. 35B are provided.

On the lower surface of the spacer 31, an engaging groove 27 provided on the lower surface of the die 13, an engaging groove 37 having substantially the same shape as the engaging positioning protrusions 29A and 29B,
The engagement positioning protrusions 39A and 39B are provided.

With the above structure, the engaging groove 37 provided on the lower surface of the spacer 31 is engaged with the projection 21 provided on the upper surface of the die base 11 and the engaging groove 37 provided on the upper surface of the die base 11 is provided. Positioning groove 23A,
The engagement positioning projections 39A and 39B provided on the lower surface of the spacer 31 are engaged with 23B, respectively.

Further, the engaging groove 27 provided on the lower surface of the die 13 is engaged with the projection 33 provided on the upper surface of the spacer 31, and the engagement positioning provided on the upper surface of the spacer 31. The die 13 is formed in the grooves 35A and 35B.
Positioning projections 29A, 2 provided on the lower surface of
9B are respectively engaged.

By interposing various spacers 31 having different heights between the die base 11 and the die 13, it is possible to easily and accurately change and adjust the height position of the upper surface of the die 13. it can. Otherwise, Figure 1
An effect similar to that of the example described with reference to FIG.

In the spacer 31 shown in FIG. 4, when the upper surface of the die base 11 is an engagement groove and an engagement positioning protrusion, and the lower surface of the die 13 is an engagement protrusion and an engagement positioning groove, the spacer Even if the shapes provided on the upper surface and the lower surface of 31 are reversed, it is possible to cope with this.

FIG. 5 shows an example of another embodiment. 5, the same components as those in FIGS. 1, 2 and 3 are denoted by the same reference numerals, and redundant description will be omitted.

FIG. 5 shows a case where the die base 11 is used as a die supporting member. In FIG. 5, inclined surfaces 41A and 41B are provided on the front and rear edges of the lower part of the die 13 as front and rear guided surfaces. In addition, inclined surfaces 43A, 43 as front and rear guide surfaces for guiding the die 13 to the center in the front-rear direction by contacting the inclined surfaces 41A, 41B on the front and rear edges of the upper portion of the die base 13.
A is provided.

With the above configuration, when positioning and fixing the die 13 on the die base 11, the inclined surface 41 of the die 13
A and 41B are inclined surfaces 43A and 43B on the die base 11.
, And is guided to the center of the die base 11 in the front-rear direction, so that the engagement groove 27 of the die 13 engages with the engagement protrusion 21 of the die base 11, and the engagement positioning protrusions 29A, 29B of the die 13 Since the engagement is made with the engagement positioning grooves 23A and 23B of the die base 11, the positioning can be performed more easily and accurately. Other than that, the same effects as in the examples of FIGS. 1, 2 and 3 are obtained.

In FIG. 5, the die supporting member is a die base 1.
Instead of the die holder 9, the die holder 9 may be used. In this case, it is needless to say that the engaging protrusion 21 and the engaging positioning grooves 23A and 23B are provided on the upper surface of the die holder 9 similarly to the die base 11.

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

[0050]

As will be understood from the above embodiments, according to the present invention, the die can be easily and accurately positioned and fixed on the die base, and when the die is switched back and forth. The processing groove of the die and the tip of the punch can be easily aligned. Moreover, it is particularly effective when combining split dies.

[0051]

[0052]

[0053]

[0054]

[0055]

[0056]

[0057]

[Brief description of the drawings]

FIG. 1 is a side view showing a die apparatus and a punch according to the present invention.

FIG. 2 is an exploded side view showing a die and a die base.

FIG. 3 is a perspective view of a die base.

FIG. 4 is a side view showing an example of another embodiment of the present invention.

FIG. 5 is an exploded side view of a die and a die base showing another embodiment of the present invention.

FIG. 6 is an explanatory side view showing a state where a punch and a die are mounted on a conventional press brake.

FIG. 7 is an explanatory side view of a state in which a punch and a die are mounted on a conventional press brake.

[Explanation of symbols]

 Reference Signs List 3 Lower table 7 Punch 9 Die holder 11 Die base 13 Die 15 Attachment part 21 Projection part (Reception part) 23A, 23B Engagement positioning groove part 25A, 25B First and second V-groove (Working groove) 27 Engagement groove part (Non-reception part) 29A, 29B Engagement positioning projection 31 Spacer 33 Protrusion 35A, 35B Engagement positioning groove 37 Engagement groove 39A, 39B Engagement positioning projection 41A, 41B Inclined surface (guided surface) 43A, 43B Inclined surface (guide surface) )

Claims (1)

(57) [Claims] 1. A front and rear first and second processing groove (25)
A, 25B) are provided on the lower surface of a die (13) formed in the left-right direction. A left-right engagement groove (27) is provided, and front and rear surfaces of the engagement groove (27) and the first and second processing grooves (27). 25A,
25B) distance (A, B) from the center (C ₁ , C ₂ )
Are respectively provided equally, engagement positioning protrusions (29A, 29B) are provided before and after the engagement groove portion (27), and the die (13) is provided before and after the front and rear engagement positioning protrusions (29A, 29B). Slant surfaces (41A, 41B) inclined in the front-rear direction are respectively provided on the front and rear edges of the lower part of the die, and the protrusions (2) that can be engaged with the engagement grooves (27) of the die (13).
On the upper surface of a die base (1) having (1) on the upper surface, front and rear engagement positioning grooves (23A, 23B) are provided which are freely engageable with the engagement positioning protrusions (29A, 29B). The inclined surfaces (41A, 41B) of the die (13) before and after the alignment groove (23A, 23B).
Inclined surface (43A, 43A,
43B).