JPH0810870A - Device for piercing inclining hole - Google Patents

Abstract

PURPOSE:To easily make the regulation of gap between a die and a punch and to shorten the working time of the die matching. CONSTITUTION:A die 37 and a punch 41 of a piercing mechanism 32 are arranged on a same axial line, and the die 37 and the punch 41 are inclined against a hoop material 7 with an inclining block 45. Therefore, the working for matching the die can be made easily by approaching the punch 41 to the die 37 and regulating in a time of regulating the gap between the die 37 and the punch 41. In a case of changing an inclining angle of a jetting hole, changing can be made easily by changing the inclining block 45.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tilt hole drilling device suitable for drilling tilt holes such as injection holes in a nozzle plate of a fuel injection valve.

[0002]

2. Description of the Related Art Generally, in order to make an inclined hole in a plate material,
The die and the punch are tilted to a desired angle with respect to the plate material, and the punch is driven toward the die to punch the plate material to form an inclined hole. The plate material having the inclined holes formed therein is used, for example, as a nozzle plate of a fuel injection valve of an engine so that fuel is injected from the inclined holes.

Therefore, first, FIGS. 7 to 13 show a fuel injection valve having a nozzle plate having injection holes.

In the figure, reference numeral 1 denotes an injection valve main body which constitutes a part of a fuel injection valve. An electromagnetic actuator (not shown) is provided in the injection valve main body 1, and the injection valve main body 1 is provided.
A connector 2 is provided on the base end side of the electromagnetic actuator so that the electromagnetic actuator is driven by an injection signal supplied from the outside via the connector 2. Further, a filter 3 is provided on the outer peripheral side of the injection valve body 1, and the filter 3 purifies the fuel supplied into the injection valve body 1 through a fuel pipe (not shown). .

Reference numeral 4 denotes a tubular valve body provided on the tip end side of the injection valve body 1. A valve seat 4A and an injection port 4B are formed at the tip end of the valve body 4, and the tip end surface 4 thereof is provided.
C is a flat surface perpendicular to the injection port 4B.

Reference numeral 5 denotes a needle valve slidably inserted in the valve body 4, and the needle valve 5 is driven by an electromagnetic actuator to separate from and seat on a valve seat of the valve body 4 for injection. The opening 4B is opened and closed, and the fuel in the injection valve main body 1 is injected from each injection hole 6A described later through the injection port 4B.

Reference numeral 6 denotes a nozzle plate fixed to the tip surface 4C of the valve body 4, and at the central portion of the nozzle plate 6, there are four injection holes 6A, 6 communicating with the injection port 4B.
.. are formed at predetermined intervals, and the respective injection holes 6A are inclined holes for injecting fuel in different directions.

Here, as shown in FIG. 8, the nozzle plate 6 has a plurality of positioning holes 7A and 7A on both ends in the width direction.
A hoop material 7 as a plate material having a band shape having A, ... Is unwound from an unwinding device (not shown), and the hoop material 7
In addition, the injection hole 6A,
6A, ... are formed by inclining each four by a predetermined inclination angle θ with respect to the plate thickness direction (see FIG. 9), and then formed into a disc shape along imaginary circles 8, 8, ... By punching and press-molding, a dish-like shape as shown in FIG. 10 is formed. The nozzle plate 6 formed in this way
Is fixed to the valve body 4 as shown in FIG. 7 by means such as laser welding while being pressed against the tip surface 4C of the valve body 4.

Next, an injection hole drilling device for drilling each injection hole 6A in the nozzle plate 6 will be described with reference to FIGS. 11 to 13.

In the figure, reference numeral 11 denotes an injection hole punching device as an inclined hole punching device, and the injection hole punching device 11 is generally composed of a press machine 12, a punching mechanism 15 and the like which will be described later.

Reference numeral 12 denotes a press machine that serves as a base of the injection hole punching device 11. The press machine 12 is disposed on the lower die 13 on the fixed side and above the lower die 13 so as to move upward and downward. The upper mold 14 and the drive mechanism (not shown) for moving the upper mold 14 upward and downward are generally configured.

Reference numeral 15 denotes a punching mechanism provided between the lower die 13 and the upper die 14, and the punching mechanism 15 is a die 1 described later.
6, a guide rod 18, a plate pressing block 19, and a punching rod 22 are generally included.

A die 16 is detachably fixed to the lower die 13 through a bolt (not shown) and has a punching hole 17 formed in the die 16 at a position near the center left side. The punching hole 17 has a nozzle plate 6 for the hoop material 7 whose axis O1 -O1 is located on the die 16.
Of the injection hole 6A.

Reference numerals 18 and 18 are a plurality of guide rods (only two are shown) whose upper end side is fixed to the upper mold 14 and whose lower end side extends downward, and 19 is arranged above the upper mold 14 via the guide rods 18, Each of the plate pressing blocks hung so as to be movable downward is shown, and the plate pressing block 19 includes
A stepped guide hole 20 for guiding the punching rod 22 is formed, and the guide hole 20 is inclined at an inclination angle θ like the punching hole 17, and as shown in FIG. The axis line O2 -O2 of the material 7 is in contact with the axis line O1 -O of the punched hole 17.
It is placed so that it is coaxial with 1.

Numerals 21 and 21 are coil springs located on the outer circumference of each guide rod 18 and provided between the upper die 14 and the plate pressing block 19. The coil springs 21 face the plate pressing block 19 downward. The upper mold 14
The hoop member 7 is fixed with a predetermined pressing load between the hoop member 7 and the die 16 during the downward movement.

Reference numeral 22 denotes a punching rod provided over the upper die 14 and the plate pressing block 19, and the base end side of the punching rod 22 is a cam mechanism provided in the upper die 14 via a bracket 22A. (Not shown), and the tip end side is slidably fitted in the guide hole 20. Also,
A punch 23 is attached to the tip of the punching rod 22, and the punch 23 has an outer diameter dimension slightly smaller than the inner diameter dimension of the punching hole 17, for example, a radius of 0.01 mm.
It is set small.

The injection hole punching device 11 according to the prior art has the above-mentioned structure. When the hoop material 7 is placed on the die 16, first, the positioning rod (not shown) of the positioning mechanism is moved. Each positioning hole 7A of the hoop material 7
And the hoop member 7 is positioned at the drilling position.
Next, the upper die 14 of the press machine 12 is lowered, and as shown in FIG. 12, the hoop material 7 is fixed between the plate pressing block 19 and the die 16. And in this state, the upper mold 14
Is moved down, and the punching rod 22 connected to the upper die 14 via the cam mechanism is moved toward the punching hole 17 along the guide hole 20. As a result, as shown in FIG. 13, the punch 23 of the punching rod 22 obliquely penetrates the hoop material 7 to form an injection hole 6A in the hoop material 7.

Then, the unwinding direction of the hoop material 7 and the installation position of the injection hole punching device 11 are changed, and the above-described operation is repeated three times, so that the hoop material 7 is formed as shown in FIGS. The injection holes 6A of 4 are formed by four each.

[0019]

In the injection hole punching device 11 according to the above-mentioned conventional technique, the punching hole 17 and the punch 23 are formed in the state where the plate pressing block 19 is in contact with the hoop material 7 on the die 16. Since they are coaxial, it is very difficult to adjust the clearance between the punching hole 17 and the punch 23 at the time of mold matching, and there is a problem that the adjustment work takes a long time. In the case of small-volume production, a great deal of work time is required for mold matching.

Further, since the punch 23 is driven by using the press machine 12, the injection hole punching device 11 concerned.
The size of the device itself becomes large, which causes a problem of increasing the initial cost and a problem of requiring an installation space.

The present invention has been made in view of the above-mentioned problems of the prior art, and provides an inclined hole punching device capable of facilitating the adjustment of the gap between the die and the punch and shortening the work time of the mold matching work. Is intended.

[0022]

In order to solve the above-mentioned problems, an inclined hole punching device adopted by the present invention fixes a plate member at a punching mechanism and a position where the inclined hole is punched by the drilling mechanism. A positioning mechanism, wherein the drilling mechanism includes a fixed frame, a moving frame provided so as to be able to approach and separate from the fixed frame, a die attached to the fixed frame, and the die facing each other, And a punch attached to the moving frame so as to be positioned on the coaxial line, a driving means for driving the moving frame, and provided between the fixed frame and the installation surface, and the die and the punch with respect to the plate material. And an inclined block having an inclined surface to be inclined.

Further, it is preferable that the positioning mechanism is provided separately from the drilling mechanism.

Further, it is preferable to use a fluid pressure cylinder as the driving means.

Furthermore, it is preferable that the inclined block is attachable to and detachable from the fixed frame and the installation surface.

[0026]

With the above construction, when the punch is driven toward the die through the moving frame by the driving means, the punch inclined at the inclined surface of the inclined block forms the inclined hole in the plate material. Further, the clearance adjustment between the die and the punch is facilitated by disposing the die and the punch on a coaxial line.

Further, by providing the positioning mechanism separately from the drilling mechanism, the position where the inclined hole is formed in the plate material can be easily changed by moving the drilling mechanism with respect to the positioning mechanism.

Further, by using the fluid pressure cylinder as the driving means, it is possible to obtain an appropriate pressing force necessary for forming the inclined hole.

Furthermore, by making the tilting block attachable to and detachable from the fixed frame and the installation surface, the tilting block is changed to a tilting block having another tilting surface having a different tilt angle, whereby the die for the plate material is changed. And the inclination angle of the punch can be changed.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An injection hole punching device according to an embodiment of the present invention will be described below with reference to FIGS.

In the figure, reference numeral 31 denotes an injection hole punching device as an inclined hole drilling device according to the present embodiment, which is disposed on the installation surface G. The injection hole punching device 31 is a drilling mechanism described later. 32 and a positioning mechanism 46 and the like.

Reference numeral 32 denotes a punching mechanism which is a main body of the injection hole punching device 31, and the punching mechanism 32 is, as shown in FIG. 2, a fixed frame 33, a movable frame 36, and a die 3 which will be described later.
7, punch 41, air cylinder 44, tilt block 45
And so on.

Reference numeral 33 denotes a fixed frame mounted on the inclined block 45 via a bolt (not shown), and a die mounting hole 33A opening upward is formed at the center of the fixed frame 33. Also, the fixed frame 3
3 includes two guide rods 34 (1
Only the book is shown).

Reference numeral 35 denotes a cylinder frame located above the fixed frame 33 and attached to the upper end of each guide rod 34. The cylinder frame 35 has an insertion hole 35A through which the rod 44A of the air cylinder 44 is inserted. Has been formed.

Reference numeral 36 denotes a moving frame provided between the fixed frame 33 and the cylinder frame 35. The moving frame 36 is attached to each guide rod 34 via two guide tubes 36A (only one is shown). It is slidably mounted, so that it can move (ascend or descend) between the fixed frame 33 and the cylinder frame 35. Also,
At the center of the moving frame 36, a stepped insertion hole 36B into which the pressing cylinder 42 is slidably inserted is formed.

37 is a die mounting hole 3 of the fixed frame 33.
3D shows a die attached inside 3A, and the die 37 is formed with a stepped punching hole 37A located at the center. In addition, the upper end surface of the die 37 has a hoop material 7
The inclined end surface 37B is parallel to the (installation surface G), and the inclined end surface 37B fixes the hoop member 7 between the inclined end surface 37B and a pressing end surface 42A of a presser tube 42 described later, as shown in FIG. is there.

Reference numeral 38 denotes a punch support member fixed to the upper surface side of the moving frame 36. The punch support member 38 is formed in a U-shape that opens downward, and an air cylinder is provided on the upper surface side of its upper plate portion 38A. A connecting member 39 to which the tip of the rod 44A of 44 is connected is fixed.

A base end 40 of the punch support member 38 is fixed to a lower surface of the upper plate 38A of the punch support member 38, and a distal end of the movable frame 36 is provided.
4 is a stepped columnar support rod projecting from the insertion hole 36B of the punch 41. The punch 41 is inserted into the punching hole 37A of the die 37 at the tip of the support rod 40 as shown in FIG.
Is installed. Also, the punch 41 is a die 3
7 and the outer diameter thereof is slightly smaller than the inner diameter of the punched hole 37A of the die 37, for example, the radius is set to be smaller by about 0.01 mm.

Reference numeral 42 designates a holding cylinder slidably fitted in the fitting hole 36B of the moving frame 36. The holding cylinder 42 has its base end side engaged with the fitting hole 36B and has an inner peripheral surface. Are in sliding contact with the outer peripheral surface of the support rod 40. Also, the holding cylinder 42
As shown in FIG. 3, the front end surface of the is a pressing end surface 42A that is inclined so as to fix the hoop material 7 between the inclined end surface 37B of the die 37. Further, the holding cylinder 42 is
The coil spring 43 urges the hoop member 7 downwardly so that the hoop member 7 is moved to the die 37 when the moving frame 36 descends.
It is fixed with a predetermined pressing load between and.

Reference numeral 44 denotes an air cylinder as a driving means attached to the upper surface side of the cylinder frame 35, and the tip end portion of the rod 44A of the air cylinder 44 is engaged with the connecting member 39. The air cylinder 44 moves the moving frame 36 upward and downward by supplying air from the outside.

Reference numeral 45 denotes an inclined block provided between the installation surface G and the fixed frame 33, and the inclined block 45
The lower end surface of the is an inclined surface 45A that is inclined at the inclination angle θ of the injection hole 6A. Thereby, the drilling mechanism 32
The whole (axis O3 -O3) is inclined with respect to the hoop material 7 by an inclination angle θ. Further, the inclined block 45 is
Attaching to and detaching (moving) from the installation surface G via bolts (not shown)
It is attached so that it can be moved with respect to the hoop member 7.

On the other hand, reference numerals 46 and 46 denote a pair of positioning mechanisms arranged on both the left and right sides (the upstream side and the downstream side in the conveying direction of the hoop material 7) of the punching mechanism 32, as shown in FIG. ,
Each of the positioning mechanisms 46 is provided separately from the boring mechanism 32, and is roughly composed of a base block 47, a guide rail 48, an elevating plate 50, and a positioning rod 51 which will be described later.

Reference numeral 47 denotes a base block mounted on the installation surface G, on which a guide rail 48 extending in the conveying direction of the hoop material 7 and for guiding the hoop material 7 is provided. A pair of guide rods 49 (only one is shown) are provided upright on both left and right sides of the guide rail 48.

Reference numeral 50 denotes an elevating plate which is located above the base block 47 and is supported by each guide rod 49 so as to be able to move up and down. The elevating plate 50 has positioning holes 7A at the tips of the hoop members 7. Four positioning rods 51, 5 inserted into the
No. 1 (only two are shown) are projected downward. Also,
The lift plate 50 is driven upward and downward by a lift cylinder (not shown).

When the hoop material 7 is sequentially conveyed intermittently, each positioning mechanism 46 having the above-described structure is arranged as shown in FIG.
As shown in FIG. 5, the elevating plate 50 is driven downward via the elevating cylinder, and the positioning rods 51 are inserted into the respective positioning holes 7A of the hoop member 7 to correct the positional displacement of the hoop member 7 and punch it. The hoop material 7 is positioned at the drilling position of the installation mechanism 32.

The injection hole punching device 31 according to this embodiment has the above-mentioned structure, and its operation will be described below.

First, when the hoop material 7 is conveyed and the portion where the injection hole 6A is drilled stops at the drilling position of the drilling mechanism 32, as shown in FIG. 6, each positioning mechanism 46 is moved by the lifting cylinder. The elevating plate 50 is lowered, and each positioning rod 51 is inserted into each positioning hole 7A of the hoop material 7 to accurately position the hoop material 7 at the drilling position of the drilling mechanism 32.

Next, when the hoop member 7 is fixed at the drilling position, the drilling mechanism 32 causes the rod 44A of the air cylinder 44 to move.
Is extended to move the moving frame 36 downward. As a result, as shown in FIG. 3, the pressing end surface 42 of the pressing cylinder 42 is
A is brought into contact with the hoop material 7, and the hoop material 7 is formed between the hoop material 7 and the inclined end surface 37B of the die 37 by the spring force of the coil spring 43.
Is fixed.

Then, by further extending the rod 44A of the air cylinder 44 to project the punch 41 from the pressing cylinder 42, the punch 41 penetrates the hoop material 7 and punches out the die 37 as shown in FIG. Reach within 37A. As a result, the hoop member 7 is provided with the injection hole 6A having the inclination angle θ.

Further, the feeding direction of the hoop material 7 and the injection hole punching device 31 are moved with respect to the hoop material 7, and the above-described operation is repeated three times, as shown in FIGS. Four injection holes 6A for the hoop material 7 are formed.

On the other hand, when changing the diameter of the injection hole 6A, for example, the die 37 and the punch 41 are replaced with another die 37 and the punch 41, and then the punch 41 is brought close to the die 37, and the gap is left in this state. Since the (clearance) can be adjusted, the work of matching the die 37 and the punch 41 with each other can be easily performed.

When the inclination angle θ of the injection hole 6A is changed, the die 37, the pressing cylinder 42 and the inclination block 45 have the inclined end surface 37B, the pressing end surface 42A and the inclined surface 45A respectively have the desired inclination angle θ. By changing to a different one, the inclination of the axis O3 -O3 of the drilling mechanism 32 can be adjusted, and the inclination angle θ of the injection hole 6A can be easily changed.

Thus, according to this embodiment, the injection hole 6A
Die 37 and punch 41 to change the diameter of
Even if the die is replaced, the die 37 and the punch 41 are arranged on the coaxial line, so that the gap between the punching hole 37A of the die 37 and the punch 41 can be easily adjusted, and the working time of the die matching work can be reduced. In addition to being able to shorten significantly,
It is possible to prevent galling between the die 37 and the punch 41, and it is possible to improve the life and reliability.

Further, when the inclination angle θ of the injection hole 6A is changed, the inclination angle θ can be changed only by changing the die 37, the holding cylinder 42 and the inclination block 45. Therefore, in this case. Can also be changed easily.

Further, each positioning mechanism 46 is provided with the punching mechanism 32.
Since it is provided as a separate body from the above, it is possible to easily change the distribution position of the injection hole 6A by moving the drilling mechanism 32.

Furthermore, in this embodiment, since the air cylinder 44 is used as the drive source of the punch 41, the injection hole punching device 31 can be manufactured at low cost,
The initial cost can be reduced, the injection hole punching device 31 can be downsized as compared with the press machine 12 described in the related art, and the installation space can be effectively used.

In the above embodiment, the case where the air cylinder 44 is provided as the driving means has been illustrated, but other driving means such as a hydraulic cylinder may be used.

[0058]

As described in detail above, according to the present invention, the drilling mechanism of the tilted hole drilling device includes a fixed frame, and a movable frame provided so as to be able to approach and separate from the fixed frame. A die attached to the fixed frame, a punch attached to the moving frame so as to face the die and be positioned on a coaxial line, a driving means for driving the moving frame, the fixed frame and an installation surface. When the die and the punch are changed in order to change the diameter of the inclined hole, the die and the punch are formed between the die and the punch, and the inclined block has an inclined surface for inclining the die and the plate with respect to the plate material. However, since the die and punch are located on the same coaxial line, the gap between the die and punch can be easily adjusted, and the tilt angle of the tilt hole is changed. If that can easily cope by replacing the gradient block, and save time in the mold together work and inclination angle changing operation, it is possible to improve workability.

Further, by providing the positioning mechanism separately from the drilling mechanism, the position of the inclined hole can be easily changed by moving the drilling mechanism with respect to the positioning mechanism.

Further, by using the fluid pressure cylinder as the driving means, it is possible to obtain an appropriate pressing force for drilling the tilted hole, reducing the initial cost and downsizing the tilted hole drilling device. Can be planned.

Furthermore, by making the tilting block attachable to and detachable from the fixed frame and the installation surface, the tilting block is changed to a tilting block having another tilting surface having a different tilt angle, so that the die for the plate material is changed. Also, the inclination angle of the punch can be changed, and the inclination angle of the inclined hole can be easily changed.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an injection hole punching device according to an embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view showing a drilling mechanism in FIG.

FIG. 3 is a vertical cross-sectional view showing the punching mechanism in a state where the hoop member is fixed between the die and the presser cylinder at the same position as in FIG.

FIG. 4 is a vertical cross-sectional view at the same position as in FIG. 2, showing a drilling mechanism in a state where a punch is used to drill an injection hole in a hoop material.

5 is an enlarged vertical sectional view showing the positioning mechanism in FIG. 1. FIG.

FIG. 6 is a vertical cross-sectional view of the same position as in FIG. 5, showing a state where each positioning rod is inserted into a positioning hole to position the hoop material.

FIG. 7 is an external view of a main part broken view showing a fuel injection valve according to a conventional technique.

FIG. 8 is a plan view showing a state in which each injection hole is formed in a hoop material that is a material of a nozzle plate.

FIG. 9 is a cross-sectional view taken in the direction of the arrow IX-IX in FIG. 8 showing an enlarged state of the injection holes.

FIG. 10 is an enlarged vertical sectional view showing the nozzle plate in FIG.

FIG. 11 is a vertical sectional view showing an injection hole punching device.

12 is a vertical cross-sectional view of the injection hole punching device in a state where the hoop material is fixed between the die and the plate pressing block, at the same position as in FIG. 11.

FIG. 13 is a vertical cross-sectional view of the injection hole punching device in the state where the injection holes are punched in the hoop material with a punch, at the same position as in FIG. 11.

[Explanation of symbols]

 6 Nozzle Plate 6A Injection Hole (Inclined Hole) 7 Hoop Material (Plate Material) 31 Injection Hole Drilling Device (Inclined Hole Drilling Device) 32 Drilling Mechanism 33 Fixed Frame 36 Moving Frame 37 Die 41 Punch 44 Air Cylinder (Drive Means) 45 Inclined block 45A Inclined surface 46 Positioning mechanism G Installation surface

Claims (4)

[Claims] 1. A drilling mechanism, and a positioning mechanism for fixing a plate material to a drilling position of an inclined hole by the drilling mechanism, wherein the drilling mechanism includes a fixed frame and an approach to the fixed frame, A movable frame provided so as to be separable, a die attached to the fixed frame, and facing the die,
And a punch attached to the moving frame so as to be positioned on the coaxial line, a driving means for driving the moving frame, and provided between the fixed frame and the installation surface, and the die and the punch with respect to the plate material. And a tilted block having a tilted surface for tilting the tilted hole. 2. The inclined hole punching device according to claim 1, wherein the positioning mechanism is provided separately from the punching mechanism. 3. The inclined hole punching device according to claim 1, wherein the driving means is a fluid pressure cylinder. 4. The inclined hole punching device according to claim 1, wherein the inclined block is attachable to and detachable from a fixed frame and an installation surface.