JPH0233940Y2 - - Google Patents

Description

[Detailed description of the invention] a. Industrial application field This invention relates to a turret punch press, and more specifically, it is a method for selecting the rotation angle of an upper turret for a striker equipped with a plurality of striking parts. The present invention relates to a turret punch press which has a structure for selecting a punch to be struck, which simplifies the structure of a striking element, improves impact resistance, and reduces failure rate.

b. Prior Art In a conventional turret punch press, punches are arranged in a plurality of rows in the radial direction of the turret in order to arrange as many punches as possible on a disc-shaped turret. When selecting a plurality of punches arranged in the radial direction, a striker attached to the lower part of the ram is moved to a position above the punch to be struck.

c. Problems to be solved by the invention In the conventional structure as described above, the striking element is movably attached to the part of the ram that is subjected to extremely high impact, so it is possible to improve the impact resistance and reduce the failure rate. The configuration was not satisfactory for reducing the amount of water.

d Means for Solving the Problem This invention was made to solve the conventional problem as described above, and the punch 2 is placed above the upper turret 19 that supports a large number of punches 29.
9 is a turret punch press comprising a striking element 15 that can freely move up and down, and a plurality of punches 29 are arranged near the outer periphery of the upper turret 19 in the radial direction of the upper turret 19, The striking element 15 is provided with striking parts 47 and 49 for striking the punch 29 at a plurality of locations shifted in the radial and rotational directions of the upper turret 19.

e Effect As is clear from the above configuration, multiple punches 2
The arrangement direction of the punch 9 is the radial direction of the upper turret 19, and the plurality of striking parts of the striker 15 are offset in the radial direction and rotational direction of the upper turret, and are in a direction that intersects with the arrangement direction of the punch 29. Therefore, by selecting the rotation angle of the upper turret 19,
Only the desired punch 29 can be positioned below the appropriate striking portion.

f Embodiment FIG. 1 is a cross-sectional view showing the main parts of an embodiment of the present invention. First, a punch press as an example machine in which the present invention is implemented will be explained with reference to FIG.

The turret punch press 1 shown in FIG.
The upper frame 9 has a gate-shaped structure, and the electric motor 1 is installed inside the upper frame 9.
A crank mechanism (not shown) driven by a motor such as 1 is provided.

Ram 1 that is driven up and down by the above-mentioned crank mechanism
3 (see FIG. 4) has a striker 15 fixed to its lower end.

An upper turret 19 is horizontally supported on a rotating shaft 17 hanging from the upper frame 9 and rotated by a sprocket 21. There is also an upper turret 19 on the machine base 3.
Correspondingly, there is provided a lower turret 27 supported on a concentric rotating shaft 23 and driven by a sprocket 25.

As is clear from FIG. 1, the upper turret 19 has a large number of punches 29 mounted on a concentric circumference in double rows in the circumferential direction and the radial direction, and the lower turret 27 has a number of punches 29 mounted on a concentric circumference. Die 31
is provided in the corresponding position directly below.

With the sprockets 21 and 25 described above, the punch 29 and the corresponding die 31 can be freely positioned under the striker 15 while maintaining a vertically concentric relationship.

A numerically controlled plate positioning device 35 is provided in the gap 33 between the machine base 3 and the upper frame 9, and its gripping device 37 moves the plate (not shown) on a table 39 to move the plate to the upper part. Turret 19
and the lower turret 27.

As is clear from FIGS. 1 and 3, shot pin engagement holes 41 in the radial direction are provided in the outer circumferential surfaces of the upper turret 19 and the lower turret 27 in the number of pairs of punches 29 and dies 31. This shot pin engagement hole 41 has a shot pin 4 shown in FIG.
3 is engaged and disengaged by, for example, a fluid pressure cylinder 45 to position the upper turret 19 and the lower turret 27.

As shown in FIG. 3, the striker 15 of this embodiment has circular striking portions 47, 49 at multiple locations (two locations in this embodiment) shifted in the radial and rotational directions of the upper turret 19. (indicated by a circle with a broken line) protrudes downward, and the spaces between them are connected in such a way that the width in the center becomes narrower.

Then, as shown in Fig. 3, the shot pin 43
When the punch 29 and the shot pin engagement hole 41 are engaged with each other, the center of the inner pressing portion 47 occupies the intersection of the locus of the inner concentric circle on which the punch 29 is arranged and the direction line of the shot pin 43.

At this time, the center position of the outer striking part 49 is the third
As shown in the figure, a numerically controlled plate positioning device 35
When expressed in the coordinate system of , it is expressed by constants such as Px and Ry. It is more preferable if both the striking portions are inclined at 45 degrees with respect to the horizontal line (x-coordinate reference line) in FIG. 3, since Px=Ry.

Thus, in the case of the example shown in FIG. 3, the punch 29 whose center is located on two concentric circular loci can be provided with the shot pin engagement hole 41 provided on the outer periphery at a selected position, so that either of the striking portions 47, 49 It is struck at the center of the body.

That is, in the state shown in FIG. 3, the outer striking force part 49 is located directly above the outer punch 29 of the two punches 29 arranged in the radial direction, and the striking force part 49 is located below the inner striking force part 47. There is no punch 29 to be thrown.

Next, the upper turret 19 and the lower turret 27 are rotated slightly clockwise to engage the shot pin 43 in the next shot pin engagement hole 41.

In this case, the inner pressing portion 47 is located directly above the punches 29 located concentrically on the inner side, and no punches 29 are located directly below the outer pressing portion 49.

As described above, the two striking parts 47 of the striking element 15
Although it is not an essential condition that a narrow connecting portion is provided between and 49, it is reinforced because there is a risk of bending when the pressing portion 47 is thin.

Therefore, interference with the inner punch 29 is avoided in the case of FIG. 3 by narrowing the width at the center.

g. Effects of the invention As can be understood from the above description of the embodiments, the present invention has a striking element 15 that can freely impact the punches 29 at a position above the upper turret 19 that supports a large number of punches 29. The turret punch press is configured to be movable up and down, and a plurality of punches 29 are arranged in the radial direction of the upper turret 19 near the outer periphery of the upper turret 19, and the upper turret 19 of the striker 15 is Pressing portions 47 and 49 for pressing the punch 29 are provided at a plurality of locations shifted in the radial direction and rotational direction.

As is clear from the above structure, in the present invention, the plurality of punches 29 are arranged in the radial direction of the upper turret 19, and the plurality of striking portions 4 of the striker 15
7 and 49 are provided with positions shifted in the radial direction and rotational direction of the upper turret 19. That is, in the present invention, since the arrangement direction of the plurality of punches 29 and the arrangement direction of the plurality of pressing parts 47, 49 are the directions that intersect, the desired punch 29 can be obtained by selecting the rotation angle of the upper turret 19. It is possible to select only one part and position it at an appropriate position below the pressing parts 47, 49.

In other words, in the present invention, the striking parts 47 and 49 of the striking element 15 are not moved to the upper part of the selected punch, but are simply provided on the ram, and the rotation angle of the upper turret 19 is changed. Since the configuration is such that the punch 29 to be selected and hit is selected,
The structure of the striking member 15 is extremely simple, and the impact resistance can be improved.
This makes it possible to extremely reduce the incidence of failure.

[Brief explanation of the drawing]

Fig. 1 is a side view of an embodiment of the striker of the present invention;
The figure is a side view of a turret punch press as an example of the present invention, FIG. 3 is a plan view of the upper turret of this embodiment, and FIG. 4 is a side view and a bottom view of the striker. Explanation of symbols representing main parts of the drawings: 1... Turret punch press, 15... Striker, 19... Upper turret, 27... Lower turret, 29... Punch, 31... Die, 41... Shot pin Engagement hole, 43... shot pin, 47... striking portion.

Claims (1)

[Scope of utility model registration request] Upper turret 19 supporting a large number of punches 29
A turret punch press is provided with a striker 15 movable up and down that can freely strike the punch 29 at an upper position, and a plurality of punches are arranged in the radial direction of the upper turret 19 near the outer periphery of the upper turret 19. 2
9 are arranged and provided, and a plurality of striking parts 4 are provided at the lower part of the striking element 15 to selectively strike the punch 29.
7, 49 are provided, and the plurality of hitting portions 47, 49 are provided.
are arranged in a direction intersecting the radial arrangement of the plurality of punches 29.