JPH0683879B2 - Punch device for press die - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a punch device in a press die for changing the direction of a pressing force applied in a predetermined direction and transmitting the pressure to a punch.

(Prior Art) The pressing force of a pressing machine normally acts only vertically downward, but it is necessary to drive the punch in a direction different from the pressing force depending on the workpiece. That is, it is desirable in press working that the axis of the punch is as perpendicular as possible to the work surface of the work, but for example, when the peripheral edge of the work is inclined with respect to the surface orthogonal to the direction of the pressing force, It is necessary to set the axis line (moving direction) of the punch according to this inclination, change the direction of the pressing force of the press, and transmit it to the punch.

For this reason, conventionally, a cam upper that receives a pressing force of a press and a cam block that holds a punch and can move back and forth according to the inclination are provided, and a so-called inclined cam surface is formed between the two, so that the pressing force of the press is increased. The direction of pressure is converted and transmitted to the cam block or punch.

(Problems to be Solved by the Invention) By the way, the tilt angle of the punch with respect to the pressing force direction of the punch is required to be variously changed according to the workpiece to be processed.

However, in the above-mentioned conventional one, the cam upper and the cam block are exclusive products corresponding to a predetermined inclination angle, that is, a product made of one pin, and can only correspond to a certain inclination angle. Each time, a completely new cam upper and cam block must be manufactured in accordance with this inclination angle. Especially, since both of them are block-shaped and are considerably large members, their production is extremely troublesome and quick countermeasures. Was difficult.

Therefore, an object of the present invention is to provide a punching device for a press die, which has versatility in adaptability to changes in the inclination angle of the punch and can promptly cope with the required inclination angle. .

(Means and Actions for Solving Problems) In order to achieve the above-mentioned object, in the present invention, the pressing force is basically applied to the first holder that slidably holds the punch. A second holder that slidably holds a cam driver that receives it is swingably attached to correspond to the inclination angle. A planetary cam is provided between the rear surface of the punch and the tip of the cam driver so that the pressing force from the cam driver can be transmitted to the punch at a desired swing angle position of the second holder with respect to the first holder. I am doing it.

With such a configuration, the first inclination angle, that is, the angle between the sliding direction of the punch and the sliding direction of the cam driver, which is the pressing force direction, becomes a desired angle. With the swing angle position of the second holder with respect to the holder being set, for example, by simply installing a fixing means such as a knock pin or a bolt between the two holders, the direction of the pressing force can be changed according to the desired tilt angle. Can be transmitted to the punch. That is, the first holder, the second holder,
Main parts such as the cam driver and the planetary cam are made common regardless of the inclination angle, and the swing angle position of the second holder with respect to the first holder is set to meet the demand for changing the inclination angle. Only by fixing the holder, it is possible to promptly deal with the request for changing the inclination angle.

Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 3, 1 is a first holder, which is
The punch holder 2 includes a punch holder 2 and a cam holder 3 which is integrated with the back surface (right side surface in FIG. 1) of the punch holder 2 by using bolts as described later. Such a first holder 1 is fixed to a predetermined inclined block 4 attached to a lower die of a press die in a known manner using bolts or the like as described later.

The punch holder 2 has a punch holding hole in the left-right direction of FIG.
2a is formed, and the punch 5 is slidably fitted in the holding hole 2a. The punch 5 has a flange 5a on its back surface so that it can be easily obtained as a general-purpose product, and the flange 5a faces the cam holder 3 and is a tip portion 5b which is a processed portion for a work. Are projected from the front surface of the punch holder 2. Further, on the back side of the punch holder 2, a circular recess 2b having a predetermined depth is formed concentrically around the holding hole 2a, and the shank portion 5c of the punch 5 is positioned inside the recess 2b. An annular spring receiver 6 is fitted in the. Each of the spring holders 6 has a punch holder 2
The one end of the first return spring 7 disposed in the pair of spring accommodating holes 2c formed in the seat is seated, so that the punch 5 is passed through the spring receiver 6 to the rear side thereof, that is, to the right in FIG. Is being urged towards. Of course, the tip of the punch 5
When the displacement toward the 5b side is larger than a predetermined value, the spring receiver 6 causes the recess 2b to
It is regulated by abutting on the bottom surface of the.

The details of the punch holder 2 as described above are shown in FIG. 5 to FIG. 7. For fixing to the cam holder 3, a screw (not shown) which penetrates the bolt insertion hole 2d is formed on the cam holder 3 with a screw. It is performed by screwing into the hole 3a (see FIGS. 8 and 9). Further, as shown in FIG. 6, the first holder 1 is fixed to the inclined block 4 as follows.
Positioned by inserting a knock pin (not shown) between the pair of knock pin holes 2e formed on the left and right of the punch holder 2 (upper and lower in FIG. 5) and the knock pin hole 4a on the inclined block 4 side. , Bolt insertion hole of punch holder 2
It is performed by screwing a bolt (not shown) penetrating 2f into the screw hole 4b of the inclined block 4. Incidentally, as shown in FIG. 7, the stopper 8 is screwed to the rear surface of the punch holder 2 while being positioned on the rear surface of the spring receiver 6, so that the spring receiver 6, that is, the punch 5 is fixed to the return spring 7. Is restricted from being forcedly displaced toward the back side of the punch holder 2 by a predetermined amount or more (the stopper 8 is omitted in FIG. 1 for simplification).

The cam holder 3 includes a main body 11 shown in FIGS.
It is composed of a holding plate 12 shown in FIGS. 11 and 12. The main body 11 includes a pair of left and right side wall portions 11a and a lower cam receiving portion 11b connecting the front lower end portions of the side wall portions 1a.
And 11a and 11b by which the collar of the punch 5 (
5a) A cam storage space A (see also FIG. 1) facing the back is formed. Further, the pressing plate 12 is installed between the front upper end portions of the pair of left and right side wall portions 11a, and constitutes the upper wall of the cam storage space A. As shown in FIG. 20 and FIG. 21, a planetary cam 13 having an outer peripheral surface which is cylindrical and has a circular cross section is arranged in the cam storage space A. This planet cam 13
As is clear from FIG. 1, the circular outer peripheral surface of the lower cam receiving portion 11b can be brought into contact with the back surface of the collar portion 5a of the punch 5, and the shaft thereof is mounted on the lower cam receiving portion 11b. The center of the punch 5 is located on the extension of the axis of the punch 5. In addition,
A screw insertion hole for fixing the holding plate 12 to the main body 11 is indicated by reference numeral 12a, and a screw hole of the main body 11 corresponding to the screw insertion hole 12a is indicated by reference numeral 11c (FIGS. 8, 9, and 11). ,
(See Figure 12).

A second holder 21 is swingably attached to the cam holder 3. This second holder 21 is shown in FIGS.
A main body 22 shown in FIG. 15 and a pressing plate 23 (see FIGS. 16 and 17) screwed to the main body 22,
The screw insertion hole for screwing is indicated by the reference numeral 23a, and the screw hole is indicated by the reference numeral 22a. The main body 22 includes a pair of left and right leg portions 22b, and a pair of rotating shaft portions 22c that are arranged on the same axis as each other by projecting the outer surface side of the lower end portion of the leg portions 22b in a cylindrical shape. In addition, the rear cam receiving portion 22d that connects the back side of the pair of leg portions 22b, and a pair of block-shaped left and right extending from the upper ends of the pair of leg portions 22b in a direction away from each other. It has a fixing portion 22e.
By fixing the pressing plate 23 to the front side of the main body 22 as described above, a cam driver is provided between the pressing plate 23, the pair of left and right leg portions 22b, and the rear cam receiving portion 22d. A guide hole 24 is formed, and a cam driver 25 shown in FIGS. 18 and 19 is slidably fitted in the guide hole 24.

As described above, the second holder 21 holding the cam driver 25
Is attached to (the main body 11 of) the cam holder 3 so as to be swingable. That is, a pair of left and right guide grooves 11d that open to the front end face side are formed on the inner peripheral surfaces of the pair of left and right side wall portions 11a of the main body 11 of the cam holder 3, and the width of the guide grooves 11d (see FIGS. 1 and 9). (Upper and lower width in the figure) is a width corresponding to the outer diameter of the rotating shaft portion 22c, and the inner back portion (rear end portion) thereof is formed in an arc shape corresponding to the rotating shaft portion 22c. ing. Thereby, the main body of the second holder 21
The leg 22b of 22 is displaced from the front end side of (the main body 11 of) the cam holder 3 such that the pivot shaft 22c is along the guide groove 11d, so that the pivot shaft 22c is located inside the guide groove 11c. It is located in the bearing. In this way, the second holder
Reference numeral 21 is swingable with respect to the cam holder 3 about a rotary shaft portion 22c, and the swing center line is indicated by l (FIGS. 1 to 4, FIG. 8, FIG. 10, FIG. (See Figures 13 to 15). The swing center line 1 is made to coincide with the axis of the planet cam 13 described above. In order to avoid interference between the second holder 21 and the first holder 1 (cam holder 3) according to the swing of the second holder 21, the upper end edge of the cam holder 3 has a swing center line l within a predetermined range. It is formed in an arc shape centered on.

As described above, in the second holder 21 that is swingable by the cam holder 3, the distance between the pair of left and right leg portions 22b of the main body 22 is
The width of the planetary cam 13 is made slightly larger than the axial width of the planetary cam 13, and then the cam receiving portion 22d is positioned substantially on the back side of the planetary cam 13 (see FIG. 1). The cam driver 25 has a base end surface serving as a pressure receiving surface 25a, and a tip end surface serving as an arcuate pressing surface 25b facing the planet cam 13 so as to be convex toward the planet cam 13. ing. A return mechanism that urges the cam driver 25 toward the pressure receiving surface 25a side is provided. That is, the second holder 21
In the rear cam receiving portion 22d of (the main body 22), a storage hole 26 that opens to the upper end surface of the main body 22 is formed in parallel with the cam driver 25, and the storage hole 26 and the cam driver 25
A guide hole 27 that communicates with the guide hole 24 and extends a predetermined length along the storage hole is formed. In addition, a guide pin 28 protruding from the rear surface of the cam driver 25 (see FIGS. 1 and 15)
However, it extends through the guide hole 27 into the accommodation hole 26, and an upward biasing force from the return spring 29 inserted into the accommodation 26 is applied to the guide pin 28. As a result, the cam driver 25 is constantly urged toward the pressure receiving surface 25a side. The upper end opening of the storage hole 26 is closed by a screw lid 30 (see FIG. 1).

Here, the first holder 1 (cam holder 3) of the second holder 21
In the embodiment, the fixing of the left and right is performed by a pair of left and right knock pins 41 and a pair of left and right bolts 42 (see FIG. 4). That is, a pair of left and right knock pin holes 43 and bolt screw holes 44 are formed in (the body 22 of) the second holder 21 (see FIGS. 2, 4, and 13 to 15). ,
In the first holder 1 (cam holder 3), the knock pin hole 45 and the recess 46 are provided so as to correspond to the knock pin hole 43 and the screw hole 44 in the swinging range of the second holder 21 with respect to the first holder 1. Multiple sets are formed. When fixing the second holder 21 to the first holder 1,
The second holder 21 is positioned at a desired swing angle position with respect to the first holder 1, and then the knock pin 41 is positioned so as to straddle the knock pin hole 43 and the knock pin hole 45. The tip of the bolt 42 screwed into the hole 44 is inserted into the recess 46, so that the knock pin 41 and the bolt 42 cause the second holder 21 to move relative to the first holder 1 at the desired swing angle position. It is fixed without rattling.

As described above, the second holder 21 can be swung with respect to the first holder 1 within a range of about a little less than 90 ° indicated by reference numeral X in FIG. 1 in the embodiment, and within the range of X, a desired holder can be swung. It is fixed at the swing angle position. That is, in FIG. 1, the pressing force direction F1 and the working direction F2 by the punch 5 are substantially perpendicular to each other, and in FIG. 4, the angle between the two directions F1 and F2 is larger than that in FIG. Furthermore, the case where the angle θ is increased is shown. Therefore, when the pressing force is applied like F1 with the second holder 21 fixed at the desired swing angle position in this way, the cam driver 25 is displaced in the same direction as the pressing F1, and this cam driver is displaced. The pressing displacement of 25 is redirected by the planet cam 13 and then transmitted to the punch 5 as a processing force in the F2 direction.

FIG. 22 shows a second embodiment of the present invention. The same components as those in the above embodiment are designated by the same reference numerals and the description thereof will be omitted.

In this embodiment, the cam driver 25 is made as long as possible in the axial direction of the punch 5, and the pressing surface 25b has a taper angle (22nd
In the figure, the angle formed by the pressing surface 25b with respect to the left-right direction is a gentle tapered surface. Further, the planetary cam 13 is formed in an arc shape centered on the swing center line l so that the surface facing the pressing surface 25b of the cam driver 25 is convex toward the pressing surface 25b. The contact surface for the punch 5 is formed as a flat surface. With such a configuration, the stroke amount of the punch 5 with respect to the stroke amount of the cam driver 25 can be made much larger than that in the above-described embodiment based on the loose taper angle of the pressing surface 25b.

Although the embodiment has been described above, the present invention is not limited to this, and includes the following cases, for example.

The planet cam 13 may be spherical in shape as a whole. However, if the columnar shape (which may be hollow) as in the embodiment is used, it is possible to transmit the press pressing force not by “points” but by “lines”, so from the viewpoint of strength, etc. It is preferable to use the one as in the embodiment.

The fixing tool for fixing the second holder 21 to the first holder 1 may be only one of the knock pin 41 and the bolt 42.

The planet cam 13 can be held on the second holder 21 side.

The second holder 21 may be fixed to the side surface of the first holder 1.

(Effects of the Invention) As is apparent from the above description, the present invention makes it possible to change the pressing force and the working direction by punching only by making all the main parts common and changing the fixing position of the second holder with respect to the first holder. It is possible to easily and quickly deal with the change of the inclination angle of the.

Of course, in the present invention, it is possible to use a readily available general-purpose product without having to use a punch having a specific shape, which is advantageous in terms of implementation.

[Brief description of drawings]

FIG. 1 is an overall front sectional view showing an embodiment of the present invention. FIG. 2 is a partial sectional plan view of FIG. FIG. 3 is a right side view of a partial cross section of FIG. 1. FIG. 4 is a front sectional view of an essential part corresponding to FIG. 1 when the swing angle position of the second holder with respect to the first holder is changed. 5 to 7 show a punch holder constituting the first holder. FIG. 5 is a plan half sectional view thereof, FIG. 6 is a partial front sectional view thereof, and FIG. 7 is the right side of FIG. Face view. 8 to 10 show a cam holder main body portion which constitutes the first holder, and FIG. 8 is a partial cross-sectional plan view thereof, FIG.
Figure is a front view, and Figure 10 is a right side view of Figure 8. 11 and 12 show a pressing plate as one component of the cam holder that constitutes the first holder. FIG. 11 is a side view thereof, and FIG. 12 is a bottom view of FIG. 13 to 15 show the main body of the second holder,
13 is a partial sectional plan view thereof, FIG. 14 is a front partial sectional view, and FIG. 15 is a right side partial sectional view of FIG. 16 and 17 show a holding plate as one component of the second holder. FIG. 16 is a side view thereof, and FIG. 17 is a bottom view of FIG. 18 and 19 show a cam driver, FIG. 18 is a front view thereof, and FIG. 19 is a right side view of FIG. 20 and 21 show a planetary cam, FIG. 20 is a front view thereof, and FIG. 21 is a right side view of FIG. FIG. 22 shows another embodiment of the present invention and is a simplified front view corresponding to FIG. A: Cam storage space l: Swing center line X: Swing range 1: 1st holder 2: Punch holder 2a: Holding hole 3: Cam holder 5: Punch 11: Main body 11b (of cam holder) 11b: Lower cam receiving part 11d: Guide groove (bearing part) 12: Presser plate (of cam holder) 13: Planetary cam 21: Second holder 22: Main body of second holder 22c: Rotating shaft part 22d: Rear cam receiving part 22e: Fixed part 23: Holding plate 24 (of the second holder): Guide hole 25: Cam driver 25a: Pressure receiving surface 25b: Pressing surface

Claims (1)

[Claims] 1. A first holder (1), a second holder (21) swingably attached to the first holder (1), and the second holder (21) with respect to the first holder (1). Fixing means (41, 42) for fixing the holder (21) at a desired swing angle position, a punch (5) slidably held by the first holder (1), and the second holder (21) A cam driver (25) which is slidably held by the press driver and receives a pressing force, and is arranged between the back surface of the punch (5) and the tip of the cam driver (25). A punching device in a press die, comprising: a planetary cam (13) for changing the direction of the pressing force from the driven cam driver (25) and transmitting it to the punch (5).