JP2000263152A - Press device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and exactly adjust the positions of a punch and die. SOLUTION: The punch 9 is held with a punch holder 10 so as to be slidable in an inclined direction to the pressing direction (vertical direction) of a pressing member and also, by operating dimension adjusting mechanism, the dimension δo between the punch holder 10 and the die 5 is adjusted. Thus, because the punch 9 is moved in the direction orthogonally crossed to the direction of the dimension δo in accordance with the change of the dimension δo, the positioning of the punch 9 to the die 5 is easily executed. Then, the positions of the punch 9 and the die 5 are adjusted easily and exactly without being affected by the skill of an adjusting worker.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press device for forming a workpiece by pressing a punch against a workpiece such as a metal plate placed on a die.

[0002]

2. Description of the Related Art For example, Japanese Patent Laid-Open Publication No.
In the invention described in Japanese Patent No. 7600, the punch is held by a punch holder (punch block), and the punch is slidable with respect to the punch holder by interposing a guide bush between the punch and the punch holder. The dice is fixed to the dice plate with a dice bush interposed between the dice plate and the die plate.

[0003]

In recent years, as a demand for a press-formed product made of a thin plate material, fine and precise processing has been strengthened. To meet this requirement, not only increase the dimensional accuracy of the punch and the die, but also precisely adjust the position of the punch and the die with respect to the die when pressing the punch against the workpiece, and place the punch and the die in the press device. There is a need to assemble.

[0004] To meet this need, in the press apparatus described in the above publication, the punch and the die are assembled with an insert or a bush interposed therebetween. , And the position of the insert with respect to the punch holder needs to be adjusted by, for example, interposing a thickness plate between the insert and the punch holder.

Similarly, when adjusting the position of the die, the die is removed from the die plate, and the position of the die bush with respect to the die plate is adjusted by interposing a thickness plate between the die bush and the die plate. There is a need. For this reason, in the press device described in the above publication, it is necessary to disassemble the press die (punch, die, punch holder, die plate, etc.) every time the position of the punch or the die is adjusted. There is the problem of having a lot of time.

In addition, since the position of the punch or the die is adjusted by changing the thickness of the thickness plate, the skill of the adjustment operator is greatly affected, and the adjustment work is likely to vary. In view of the above, an object of the present invention is to easily and accurately adjust the position of a punch and a die.

[0007]

In order to achieve the above object, according to the present invention, the punch (9) is moved toward the die (5) and the punch (9) is moved to the die ( 5)
Pressing means (15) for pressing toward
5) a punch holder (10) arranged to hold the punch (9) slidably in a direction inclined with respect to the moving direction and to have a predetermined gap (δ) with the die (5);
A dimension adjusting mechanism (19) for adjusting a dimension (δo) of the gap (δ) in a direction parallel to the moving direction of the pressing means (15) is provided.

Accordingly, if the dimension (δo) is adjusted by moving the dimension adjusting mechanism (19), the punch (9) is moved in a direction perpendicular to the direction of the dimension (δo) according to the change in the dimension (δo). Can be moved. Therefore, the position of the punch (9) with respect to the die (5) can be easily adjusted by the dimension adjusting mechanism (19). Further, as described in the above publication, it is not necessary to adjust the position of the punch by combining thickness plates having different thicknesses, so that the punch (9) and the die (5) are not affected by the skill of the adjustment operator. Can be simply and accurately adjusted.

According to the second and third aspects of the present invention, the punch (9) is moved toward the die (5) in parallel with the thickness direction of the plate (w) and presses the punch (9) toward the die (5). And a pressing means (15) for holding the punch (9) slidably in a direction inclined with respect to the plate thickness direction and having a predetermined gap (δ) with the die (5). Punching means (10) and pressing means (1) in gap (δ).
And a dimension adjusting mechanism (19) for adjusting a dimension (δo) in a direction parallel to the moving direction of (5).

As a result, the position of the punch (9) and the die (5) can be adjusted simply and accurately without being affected by the skill of the adjusting operator, as in the first aspect of the present invention. it can. In the invention described in claim 4, the direction of movement of the pressing means (15) in the gap (δ) by the dimension adjusting means (19) so that the position of the punch (9) with respect to the die (5) becomes a predetermined position. And a pressing step of pressing the punch (9) toward the die (5) by the pressing means (15) after the adjustment step is completed.

Thus, the position of the punch (9) and the die (5) can be easily adjusted without being affected by the skill of the adjusting operator.
In addition, since it can be performed accurately, it is possible to reduce the manufacturing cost (reduce the number of adjustment steps) while improving the quality of the press-formed product. Incidentally, the reference numerals in parentheses of the above means are examples showing the correspondence with specific means described in the embodiments described later.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present embodiment relates to a press punching apparatus for forming injection holes (punched holes) in an injection hole plate (press molded product) of a fuel injection device (injector). FIG. 1 is a schematic view of a press punching apparatus to which the present invention is applied. Reference numeral 1 denotes a fixed lower die table, and 2 denotes an upper die table which is pressed by a hydraulic press (not shown) and moves vertically. Reference numeral 3 denotes a first guide post (first guide member) for guiding the movement of the upper mold base 2, and between the first guide post 3 and the upper mold base 2, a circumferential surface of the second guide post 3 is provided. A first guide bush 4 slidably in contact is provided.

A die (cutting die, female die) 5 which constitutes a part of a press die is installed on the lower die base 1, and the die 5 has a cylindrical spacer 6 interposed therebetween. In this state, it is inserted and mounted in the hole of the die plate 7. In addition, 8a and 8b are discharge holes for discharging the punched residual material in the die 5 and the lower mold base 1. Reference numeral 9 denotes a punch which presses a workpiece (metal plate material) w to form an injection hole by punching and forms a part of a pressing die. The punch 9 has a predetermined gap δ with respect to the die 5. Are slidably housed in a punch holder 10 provided with

Here, the punch holder 10 is guided by a second guide post 11 extending in parallel with the first guide post 3, and moves in the vertical direction (the thickness direction of the workpiece w) in conjunction with the upper die table 2. In addition, the punch 9 is slidably held in a direction inclined with respect to the moving direction (up-down direction). 9a is a punch 9 facing the upper mold base 2 side.
This is a coil spring that exerts an elastic force to press.

Incidentally, the second guide post 11 is press-fitted and fixed to the punch holder 10, and 11a is interposed between the second guide post 11 and the punch holder 10 to move the punch holder 10 to the second guide post 11. A guide bush that is slidable. Reference numeral 11b is a guide bush interposed between the second guide post 11 and the die plate 7 to enable the second guide post 11 to slide with respect to the die plate 7.

The punch holder 10 is provided with a hanger bolt 1 inserted slidably in the up-down direction with respect to the upper die base 2.
The hanger bolt 12 is hung from the upper mold base 2 via the second die 2, and is pressed toward the die 5 (lower mold base 1) by a coil spring (elastic member) 13. Reference numeral 14 denotes a punch holder insert made of a material (made of a cemented carbide in this embodiment) having a higher hardness than the material of the punch holder 10 (made of alloy tool steel such as SKD11 in this embodiment). The slide of the punch 9 is guided by the punch holder insert 14.

Reference numeral 15 denotes a pressing member (pressing means) which moves integrally with the upper mold base 2 and presses the punch 9 toward the die 5, and a contact surface 15a between the pressing member 15 and the punch 9 is The punch 9 is inclined substantially vertically with respect to the sliding direction of the punch 9, and a portion of the punch 9 that contacts the contact surface 15 a is formed in a spherical shape.

Reference numeral 16 denotes when the punch holder 10 descends most (when the punch holder 10 and the die 5 come closest to each other).
Is a first block that comes into contact with the punch holder 10 and mechanically regulates the minimum dimension of the gap δ. The first block 16 has a surface opposite to the contact surface 16a that contacts the punch holder 10 (the lower surface of the first block 15). Side), the pressing member 1
A first inclined surface 16b is formed that is inclined with respect to the moving direction (up-down direction) of No. 5.

Reference numeral 17 denotes a second block slidably disposed on the board surface 1a of the lower mold base 1.
Is formed with a second inclined surface 17a slidably in contact with the first inclined surface 16b. Reference numeral 18 denotes an actuator (moving means) for moving the second block 17 in a direction substantially perpendicular to the moving direction of the pressing member 15 (a direction parallel to the board surface 1a). Of the δ, a dimension δo in a direction parallel to the moving direction (up and down direction) of the pressing member 15 (see FIG. 3)
Is adjusted.

Next, a schematic operation of the press apparatus according to the present embodiment will be described. When the upper die table 2 is pressed by the hydraulic press, the upper die table 2 moves toward the lower die table 1. At this time, since the punch holder 10 is suspended from the upper die table 2, as shown in FIG. 2, the punch holder 10 comes into contact with the first block 16 while maintaining a constant distance from the upper die table 2 (collision). Move to the die 5 until the next step.

Further, when the hydraulic press continues to press the upper mold base 2, since the movement of the punch holder 10 is regulated by the first block 16, only the pressing member 15 is lowered integrally with the upper mold base 2. Then, the punch 9 is pressed by the pressing member 15 and moves toward the die 5. Therefore, the workpiece w is pressed by the punch 9, so that a predetermined injection hole is formed in the workpiece w.

Here, a method of pressing a press-formed product using the press apparatus according to the present embodiment will be described.
First, when the thickness of the workpiece w changes, or when the punch 9 or the die 5 is worn and it becomes necessary to adjust the position of the punch 9 with respect to the die 5, the dimension δo is adjusted as described above. Then, the positions of the punch 9 and the die 5 are adjusted (adjustment step).

After the completion of the adjusting step, the hydraulic press is operated to press the punch 9 toward the die 5 by the pressing member 15 so that the injection hole is formed in the workpiece w (gold metal plate) as described above. Forming (pressing step). In this example, the adjustment before the pressing step is performed only when the thickness of the workpiece w changes or when the punch 9 or the die 5 is worn and the position of the punch 9 with respect to the die 5 needs to be adjusted. Although the process is provided, when the press device is operated to further improve the quality, an adjusting process may be provided before the pressing process.

Next, a method of positioning the punch 9 with respect to the die 5 of the present embodiment and its features will be described with reference to FIG. In the press device according to the present embodiment, the punch 9 is held by the punch holder 10 so as to be able to slide in a direction inclined with respect to the pressing direction (moving direction) of the pressing member 15, so that the dimension is adjusted. If the dimension δo is adjusted by operating the mechanism 19, the punch 9 moves in a direction orthogonal to the direction of the dimension δo (the pressing direction of the pressing member 15) according to the change in the dimension δo. Thus, the positioning of the punch 9 with respect to the die 5 can be easily performed by the dimension adjusting mechanism 19.

Therefore, as described in the above publication, it is not necessary to adjust the position of the punch by combining thickness plates having different thicknesses, so that the position adjustment between the punch 9 and the die 5 is not affected by the skill of the adjusting operator. Can be performed simply and accurately. In the present embodiment,
Since the position of the punch 9 and the die 5 is adjusted by adjusting the dimension δo, the portion of the punch holder 10 corresponding to the workpiece w is, as shown in FIG. Concave portion (relief portion) 10 slightly larger than thickness
a is formed.

Further, since the position of the punch 9 and the die 5 can be adjusted simply and accurately, the workpiece w
It is possible to reduce the manufacturing cost (reduce the number of adjustment steps) while improving the quality of the (injection plate). By the way, in the present embodiment, the position adjustment between the punch 9 and the die 5 in a direction orthogonal to the sliding direction of the punch 9 (the horizontal direction on the paper) (hereinafter, this direction is referred to as Y direction) is performed by the second guide post. 11 is performed by the same means as the above publication (adjustment method using the thickness plate Tp).

This is because, in the press working for forming the injection hole in the injection hole plate of the fuel injection device (injector),
This is because position adjustment in the feed direction needs to be performed more frequently than position adjustment in the Y direction due to variations in the thickness of the workpiece w and the degree of wear of the punch 9. Therefore, Y
For the workpiece w that needs to be frequently adjusted in the feed direction similarly to the position adjustment in the feed direction, it is preferable that the position adjustment in the Y direction is also performed by the same means as the position adjustment in the feed direction.

(Other Embodiments) A dimension adjusting mechanism 19 for adjusting the dimension δo by disposing a piezo element (piezoelectric element) between the punch holder 10 and the die plate 7.
May be configured. Further, a dimension adjusting mechanism 19 that adjusts the dimension δo by operating the second block 17 with a ball screw may be configured.

Further, a mechanical press may be used instead of the hydraulic press.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a press device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of a press device showing a state where a punch holder is lowered.

FIG. 3 is an explanatory diagram of an adjustment step of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Lower mold stand, 2 ... Upper mold stand, 3 ... 1st guide post, 5 ...
Dice, 7: die plate, 9: punch, 10: punch holder, 15: pressing member, 16: first block, 17
... second block, 18 ... actuator, 19 ... dimension adjustment mechanism.

Claims (4)

[Claims] 1. A punch (9) and a die (5) constituting a press die, and are moved toward the die (5), and the punch (9) is pressed toward the die (5). Pressing means (15), which holds the punch (9) slidably in a direction inclined with respect to the moving direction of the pressing means (15), and a predetermined gap (δ) with the die (5). And a dimension adjusting mechanism (19) for adjusting a dimension (δo) of the gap (δ) in a direction parallel to the moving direction of the pressing means (15). A press device comprising: 2. A press device for punching a plate material (w) to form a punched hole, comprising a punch (9) and a die (5) constituting a press die.
And moving in parallel to the thickness direction of the plate (w) toward the die (5), and moving the punch (9) to the die (5).
A pressing means (15) for pressing the punch (9), and the punch (9) in a direction inclined with respect to the plate thickness direction.
Slidably, and a punch holder (1) provided with a predetermined gap (δ) with the die (5).
0) and a dimension adjusting mechanism (19) for adjusting a dimension (δo) of the gap (δ) in a direction parallel to the moving direction of the pressing means (15). 3. The first block having a first inclined surface (16b) that is in contact with the punch holder (10) and that is inclined with respect to the direction of movement of the pressing means (15). (16) and the first
The second inclined surface (1) that slidably contacts the inclined surface (16b).
A second block (17) having 7a), and a moving means (18) for moving the second block (17) in a direction substantially perpendicular to the moving direction of the pressing means (15).
The press device according to claim 1, wherein the press device is configured to include: 4. A method for pressing a press-formed product using the press device according to claim 1, wherein a position of the punch (9) with respect to the die (5) is a predetermined position. An adjusting step of adjusting the dimension (δo) of the gap (δ) in a direction (δo) parallel to the moving direction of the pressing means (15) by the dimension adjusting means (19) so that A pressing step of pressing the punch (9) toward the die (5) by the pressing means (15).