JPH0723058Y2 - Punching punching die - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to an improvement in a punching punching die for punching a work continuously by a punch press machine or the like.

(Prior Art) Conventionally, when punching a work, a punch press machine or the like is used, and the work is entirely punched for each punch of the striker.

(Problems to be solved by the invention) By the way, in the above-described conventional punching die, when a strip-shaped elongated hole is formed in a work, the punching operation cannot be performed by one punching operation. While doing this, the punch was reciprocating to perform continuous punching.

In this case, when the cut portion is cut, a large force acts on the edge portion of the cutting opening, causing burrs. In order to continuously make a second hole in the hole made in the first punching operation,
Due to the deterioration of the positioning accuracy of the work, a step is generated in the cutting opening (hole) of the work, and there is a problem that polishing is required in a later process and it takes time.

[Structure of the Invention] (Means for Solving the Problem) In order to solve the above-mentioned conventional problems, in the present invention, in a punching punching die for moving a workpiece and continuously punching, a die A die equipped with a hole is provided, a downwardly inclined sloping part is formed at the rear edge of the die hole, and a cylindrical punch guide is provided above the die so that the punch guide can be moved up and down. Equipped with a ring-shaped stripper plate that presses the work in cooperation with the die, and a punch body is provided in the punch guide so as to be able to move up and down.
At the lower end of the punch body, a shearing blade that can enter the die hole and a pressing surface that vertically opposes the inclined portion are respectively provided, and the front shearing blade is configured to be lower than the rear shearing blade, A tip is provided at the rear of the punch body so that it can be moved up and down, a cutting blade is provided at the lower end of the tip, and the tip is configured to fit in the die hole. A pin can be moved up and down at the front of the punch body. The pin is provided with a contact arm capable of contacting and separating from the stripper plate, and the contact arm of the pin contacts the stripper plate from above when the shearing blade of the punch body enters the die hole. In order to make the above-mentioned tip project downward with respect to this shear blade when the shear blade in the punch body enters the die hole, A cam plate having a first abutment surface and a second abutment surface abutting the upper end of the pin is provided on the punch so as to be rotatable around a horizontal axis, and the horizontal axis is made into the first abutment. Punching punching die, characterized in that it is arranged between the surface and the second contact surface, and is provided with an urging member that urges the tip to contact the first contact surface in the upward direction. Type.

(Operation) With the above configuration, the work is moved between the punch body and the die in the moving direction so that the first processed portion of the work is located above the die hole. At this time, the rear portion of the processed portion is located above the inclined portion. Next, the punch guide is lowered to integrally lower the stripper plate, and the work is pressed by the cooperation of the stripper plate and the die. Then, the punch body is lowered with respect to the punch guide.
As a result, it is possible to gradually enter the die hole from the front side shear blade to the rear side shear blade, and it is possible to gradually perform shearing processing on the work part of the work and by the pressing surface and the inclined part of the punch. The rear portion of the work piece of the workpiece is bent downward to form the bent portion.

Here, although the pin also descends with respect to the punch guide due to the lowering of the punch body, when the shearing blade of the punch body enters the die hole, the contact arm of the pin contacts the stripper plate of the punch guide, and the pin moves to the stripper plate. Is restricted by the punch guide. Therefore, the pin moves up relative to the punch body, the second contact surface side of the cam plate is pushed up, and the first contact surface side of the cam plate is pushed down. Therefore, the tip descends against the punch body against the urging force of the urging member and projects downward with respect to the shearing blade of the punch body to completely and surely separate the first processed portion from the work. You can

After the shearing (cutting) process is performed on the first processed portion to separate it from the work, the pachi body is raised with respect to the punch guide, and the punch guide is raised. And
The work is moved in the moving direction so that the next processed portion is located above the die hole. At this time, since the bent portion of the work moves in the moving direction along the die hole, the work is highly accurately moved and positioned. After the work is moved and positioned, shearing (cutting) is performed on the next portion to be processed in the work, as described above.

The work described above is appropriately repeated to perform punching processing on the work.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

Referring to FIGS. 1 to 3, the punch 3 and the die 5 in the punching punching die 1 cooperate with each other to form a work W,
For example, a strip-shaped elongated hole is punched.

An inclined portion 53 which is inclined downward is formed at an edge portion of the die hole 49 of the die 5 on the rear side (the left side in FIG. 1, and the rear side toward the paper in FIGS. 2 and 3).

In the punch in the punch die 3, a punch guide 7 is supported by an upper pallet 9 (a part thereof is not shown), and a flange portion 11 is provided on an upper portion (upper side in FIG. 1) of the punch guide 7. A lifter spring 13 is provided between the flange portion 11 and the upper pallet 9, and the lifter spring 13 constantly urges the punch guide 7 away from the work W. A punch driver 15 forming a part of the punch is engaged with the punch guide 7 via an elastic body 17 such as a leaf spring, and the elastic body 17 is more than the work W when punching the work W. It serves to pull out the punch.

Inside the punch guide 7, a punch body 19 forming a part of the punch is integrally provided with the punch driver 15, and can be raised and lowered as the punch driver 15 moves up and down. At the lower end (lower side in FIG. 1) of the punch body 19, a shearing blade capable of entering the die hole 49 of the die 5.
21 and the inclined portion 53 are provided with pressing surfaces facing each other in the vertical direction. The shear blade 21 on the front side is configured to be lower than the shear blade 21 on the rear side. An inverted T-shaped pin 23 is provided at a front portion (right portion in FIG. 1) of the punch body 19 so as to be able to move up and down, and a contact arm protruding to the left and right of the pin 23 is a link stripper in the punch guide 7. It can freely come into contact with and separate from the back surface (upper side in FIG. 1) of the plate 25.

Further, a vertically movable tip 27 is attached to the rear part of the punch body 19 (left part in FIG. 1). A cutting blade is provided at the lower end of the chip 7, and the chip 7 is configured to fit in the die hole 49.

A cam mechanism 29 is provided between the pin 23, the tip 27, and the punch driver 15, and a cam plate 31 of the cam mechanism 29 is supported by a horizontal shaft 33 mounted horizontally on the punch body 19 and is rotatable. There is. The cam plate 31 has an upper end surface 37 of the tip 27.
And a second contact surface contacting the upper end surface 35 of the pin 23. The horizontal shaft 33 is configured to be located between the first contact surface and the second contact surface. A spring 41 is provided at an appropriate position of the punch body 19 and biases the tip 27 upward to bring it into contact with the first contact surface.

The cutting blade 43 provided at the lower end of the tip 27 in the above-mentioned state is formed so as to be on the same line as the shearing blade 21 provided on the punch body 19 with the same inclined surface. The pin 23 and the tip 27 are vertically movable in holes 45 and 47 formed in the punch body 19.

On the other hand, as described above, the die 5 is a die hole into which the blade surface 21 provided on the punch body 19 and the blade surface 43 of the chip 27 are inserted.
49 are provided.

Referring to FIG. 4 together with the operation in the above-described configuration, the work W is conveyed from left to right in FIG.

FIG. 4A shows the standby state of the punching punching die 1 before the work W is punched, and after the work W is set at a predetermined punching position, the punching work is started. That is, the fourth
As shown in the figure (b), the striker 55 (not shown)
Thus, when the upper surface of the punch driver 15 is tapped, the punch guide 7 descends via the elastic body 17. When the stripper plate 25 provided under the punch guide 7 comes into contact with the work W as the punch guide 7 descends, the punch driver 15 pushes down the punch body 19.

The punch body 19 descends and the shearing blade 21 is gradually driven into the work W, and the tip of the cutting blade 43 of the tip 27 bites into the work W, and at the same time, the pin 23 contacts the stripper plate 25. When the pin 23 comes into contact with the stripper plate 25, the cam plate 31 having the second contact surface that comes into contact with the upper end surface 35 of the pin 23 has the horizontal shaft 33 as the center, and the cam plate 31 in the drawing of FIG. Rotate in the direction indicated by the arrow (counterclockwise) to the top surface of the tip 27.
37 is pressed by the first contact surface of the cam plate 31, and the tip 27 is lowered against the biasing force of the spring 41. When the tip 27 descends, the piece 57 of the work W is removed in cooperation with the die 5.

When the punching is completed, the work W has an inclined portion provided on the die 5.
An angled bend 59 along 53 is formed.

After punching is completed, the punching punching die 1 is shown in FIG. 4 (c).
Position, that is, the old position, the bent portion 59 of the work W is moved along the die hole 49, and then moved to the next punching position. Next, as shown in FIGS. 4 (d) to 4 (f),
The punching die 1 for punching is sequentially and continuously operated to lower the strip-shaped elongated hole in the work W.

The above operation will be summarized below.

The work W is moved in the movement direction between the punch body 19 and the die 5 so that the first processed portion of the work W is located above the die hole 49. At this time, the rear portion of the processed portion is located above the inclined portion 53. Next, by lowering the punch guide 7,
The stripper plate 25 is integrally lowered, and the work W is pressed by the cooperation of the stripper plate 25 and the die 5.
Then, the punch body 19 is lowered with respect to the punch guide 7. As a result, it is possible to gradually enter the die hole 49 from the front side shear blade 21 to the rear side shear blade 21, and it is possible to gradually perform shearing on the portion to be processed in the work W, and at the same time, perform punching of the punch body 19. Pressing surface and slope
By 53, the rear portion of the work piece W is bent downward to form a bent portion 59.

Here, as the punch body 19 descends, the pin 27 also descends with respect to the punch guide 7, but when the shearing blade 21 in the punch body 19 enters the die hole 49, the contact arm in the pin 23 causes the stripper plate in the punch guide 7 to move. The pin 23 comes into contact with the punch guide 7, and the pin 23 is prevented from rising with respect to the punch guide 7 by the stripper plate 25. Therefore, pin 23
Moves up relative to the punch body 19, the second contact surface side of the cam plate 31 is pushed up, and the first contact surface side of the cam plate 31 is pushed down. Therefore, the tip 27 descends with respect to the punch body 19 against the urging force of the spring 41 and projects downward with respect to the shearing blade 21 of the punch body 19, so that the first workpiece is completely and surely removed from the work W. Can be separated into

After the shearing (cutting) process is performed on the first processed portion to separate it from the work W, the punch body 19 is raised with respect to the punch guide 7, and the punch guide 7 is raised. Then, the work W is moved in the moving direction so that the next processed portion is located above the die hole 49. At this time, since the bent portion 59 of the work W moves in the movement direction along the die hole 49, the work W is highly accurately positioned and positioned. After the work W is moved and positioned, shearing (cutting) is performed on the next portion to be processed in the work W, as described above.

The above-described operation is appropriately repeated and the work W
Punching is performed on.

According to the invention of this embodiment as described above, the punch body 19
Since the shearing blade 21 is gradually shearing the workpiece W to be processed, it is possible to avoid applying a large force to the edge of the cutting opening (hole) in the workpiece W at once. The occurrence of burrs at the edges of the parts is suppressed as much as possible, and the precision of the punching process is improved.

Further, the bent portion 59 can be formed by bending the rear portion of the workpiece W downward, and the workpiece W can be moved and positioned in the movement direction along the die hole 49. Therefore, the movement and positioning accuracy of the work W is improved. Therefore, it is possible to prevent a step from being generated at the edge of the cutting opening due to the deterioration of the movement positioning accuracy of the work W.

Further, when the shearing blade 21 in the punch body 19 enters the die hole 49, the tip 27 can be made to project downward with respect to the shearing blade 21, so that the work piece is completely and reliably separated from the work W. It is possible to improve the accuracy of overtaking. (Effect of the Invention) As will be understood from the above description of the embodiments, according to the present invention, since the shearing blade of the punch gradually shears the workpiece, the cutting opening in the workpiece. It is possible to avoid applying a large force to the edge portion of the portion (hole) at one time, to suppress the occurrence of burrs at the edge portion of the cutting opening as much as possible, and to improve the precision of punching.

In addition, the rear portion of the work piece of the workpiece can be bent downward to form a bent portion, and the bent portion can be moved and positioned in the movement direction along the die hole. The accuracy of moving and positioning of is improved. Therefore, it is possible to prevent a step from being generated at the edge of the cutting opening due to deterioration of the movement positioning accuracy of the work.

Furthermore, when the shear blade of the punch enters the die hole, the tip can be made to project downward with respect to this shear blade, and the part to be machined can be completely and reliably separated from the work piece, and the punching accuracy Is further improved.

[Brief description of drawings]

1 to 3 show a main part of the present invention, FIG. 1 is a front view including a partial cross section, and FIG. 2 is II-II in FIG.
FIG. 3 is a sectional view taken along line III-III in FIG. 4 (a) to 4 (f)
FIG. 3 is an operation explanatory diagram of this device. 1 …… punching punching die 3 …… punching die 5 …… die 19 …… punch body, 21 …… shearing blade 23 …… pin, 25 …… stripper plate 27 …… chip, 29 …… cam mechanism 43 ...... Cutting blade, 53 …… Inclined part

Claims (1)

[Scope of utility model registration request] 1. A punching punching die in which a work is moved to continuously perform punching, a die having a die hole is provided, and an inclined portion inclined downward is formed at a rear edge of the die hole. Then, a cylindrical punch guide is provided at a position above the die so as to be able to move up and down, and a ring-shaped stripper plate that presses a work in cooperation with the die is provided at the lower end of the punch guide. The punch body can be raised and lowered,
At the lower end of the punch body, a shearing blade that can enter the die hole and a pressing surface that vertically opposes the inclined portion are respectively provided, and the shearing blade on the front side is configured to be lower than the shearing blade on the rear side. , The tip of the punch body can be raised and lowered, the cutting edge is provided at the lower end of the tip, the tip is configured to fit in the die hole, and the pin can be raised and lowered on the front of the punch body. And a contact arm capable of contacting and separating from the stripper plate of the pin, and when the shearing blade of the punch body enters the die hole, the contact arm of the pin contacts the stripper plate from above. When the shear blade of the punch body enters the die hole, the tip of the punch projects downward with respect to the shear blade so that the tip of the tip touches the upper edge of the die. A first contact surface and the pin second cam plate having a contact surface in contact with the upper end of which is, together with the rotatably provided around a horizontal axis to the punch,
The horizontal axis is configured to be located between the first contact surface and the second contact surface, and an urging member that urges the tip to contact the first contact surface in the upward direction is provided. A punching die for punching characterized by