JP2577347Y2 - Material punching with hole - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material blanking die for cutting a coil material into a sheet material and making a hole.

[0002]

2. Description of the Related Art In general, when a sheet material having a substantially trapezoidal shape as an automobile panel is cut out of a coil material in a cutting process of a press material, a shearing machine having a horizontally revolving type cutting blade is used. Diagonal cutting is performed. By the way, when the material cut out as described above has difficulty in the drawability at the time of the draw forming performed thereafter, a hole processing may be performed on the material to assist the draw forming. In such a case, since the above-mentioned shearing machine cannot be used, a special stamping die is manufactured and oblique cutting and drilling are performed at the same time, or if possible, a cutting blade is installed in the drawing die. This is done by performing drawing and drilling almost simultaneously. It should be noted that a hole punching device applied to a general punching die is also known to be provided with a hole punching mechanism, and a device having a structure as shown in FIG. 10 is generally used. This is because an operation thick part 67a is provided between a base 64 attached to an upper mold (not shown) and a punch holder 65 provided with a punch 66 as an extraction blade, which is urged upward by a spring (not shown). The height of the stepped cam plate 67 having the thin portion 67b for resting is advanced and retracted by the cylinder 68, thereby switching the punch height and performing punching.

[0003]

However, in the case of producing the former exclusive die, as shown in FIG. 9, a substantially trapezoidal sheet material is cut from the coil material 51 by oblique cutting.
It is necessary to cut out two sheets of the sheet material 52 by a punch,
Moreover, if the sheet material is set to have a size provided with a punching device for punching each sheet material, there is a problem that the size of the mold becomes too large and it is difficult to set the sheet material on a general press machine. When the punching device with a punching and separating mechanism shown in FIG. 10 is employed in the special punching die, an inclined surface 67c is set between the thick portion 67a for operation and the thin portion 67b for rest of the cam plate 67. Therefore, a long stroke cylinder 68 is required and the size of the cam unit is increased, so that the above-described problem of enlarging the dedicated die is more prominent.
On the other hand, when the extraction blade is installed in the latter die, there is a problem that chips generated at the time of drilling have a bad influence on the drawing.

In view of the above-mentioned problem, the present invention provides a plurality of compact blades capable of selectively separating one or two or more holes for each cutting, while making the cutting blade a horizontal reciprocating swivel type. An object of the present invention is to provide a material punching die having a hole that can be reduced in size by being equipped with a simple punching device and can solve the problem of chips.

[0005]

Means for Solving the Problems In order to solve the above problems, the present invention is configured as follows. That is, it is a material punching die with a hole for cutting a coil material fed at a constant pitch in a horizontal direction into a sheet material and making a hole, and is capable of moving up and down at least with an interval allowing the coil material to pass therethrough. Supporting and connecting the upper and lower cutting blades as a main part, having a center of rotation on the coil width center line,
A horizontal reciprocating swivel-type cutting blade unit capable of horizontal reciprocating revolving at a predetermined angle with respect to the coil feed direction for each cut, and a horizontal reciprocating revolving operation of the horizontal reciprocating revolving-type cutting blade unit, from the pad upper surface. One or two or more punching devices for separating the punching by switching the punch height by moving the cam plate to the bottom of the punch which is raised via the elastic body and pressed down from the upper mold via the elastic body to switch the punch height. It is characterized by:

[0006]

In the punching die with holes according to the present invention constructed as described above, the cutting action of the horizontal reciprocating revolving type cutting blade unit including the upper cutting blade and the lower cutting blade is performed by the lowering operation of the upper die body. At the same time, a hole is formed by a hole punching device, and a substantially trapezoidal sheet material with holes is cut out from the coil material. After the upper die body is lifted thereafter, the horizontal reciprocating revolving type cutting blade unit is horizontally rotated to the opposite side, and the cam plate of the punching device is moved forward and backward to switch the punch height and cut out next time. Prepare for cutting sheet material with holes. By repeating such an operation as one cycle, it is possible to sequentially cut out substantially trapezoidal sheet materials with holes one by one.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 shows an outline of a blank material punching die according to the present embodiment. As shown in the figure, a blank material punching die for cutting out a substantially trapezoidal holed sheet material from a coil material is a hitting type using a slide (not shown) of a press machine, and a lower die body 1, an upper die body 2, and a horizontal die body. It is composed of a reciprocating rotary type cutting blade unit 3 and a punching device 4 with a separation mechanism. The lower die main body 1 is set on a bed of a press machine through a receiving stand (not shown), and the upper die main body 2 and the horizontal reciprocating rotary cutting blade unit 3 are attached to the lower die main body 1 side. In addition, a hole punching device 4 is attached to the upper die body 2 side. Hereinafter, the details will be described.

FIG. 2 shows the lower die body 2 and the horizontal reciprocating rotary cutting blade unit 3 attached thereto, and FIG. 3 shows the upper die body 2 and the punching device 4 attached thereto. The upper mold body 2 is supported by a plurality of guide pins 5 and urethane rubber 6 erected at the four corners of the upper surface peripheral portion of the lower mold body 1 so as to be movable up and down. A predetermined distance from the upper surface of the lower mold (coil material 29
Have enough clearance to pass). The urethane rubber 6 is accommodated in a concave portion formed in the lower die body 1 so that its upper end protrudes. The arrow F in FIGS. 1 to 3 indicates the feed direction of the coil material 29.

[0009] The horizontal reciprocating revolving type cutting blade unit 3 comprises a pair of a lower cutting blade 3L and an upper cutting blade 3U. The lower cutting blade 3L is accommodated in the cavity of the lower die body 1 so that its longitudinal direction is the width direction of the coil material 29, and is mounted on a large number of turning bearings 7 arranged on the bottom surface of the cavity. In this state, it is possible to turn (horizontal rotation) around a center pin 8 erected on the center line of the coil width on the bottom surface of the cavity of the lower die body 1 at the intermediate portion in the longitudinal direction.

On the other hand, the upper cutting blade 3U is accommodated in the space of the upper die body 2 in a state of being superposed on the lower cutting blade 3L, and the lower cutting blade 3U is provided at both left and right ends in the longitudinal direction.
L is vertically guided by a guide pin 9 provided upright on the upper surface of the lower cutting blade 3L, and at least a coil material 29 is provided to the lower cutting blade 3L via urethane rubbers 10 which are arranged back and forth with the guide pin 9 interposed therebetween. It is held so that it is held at intervals that allow traffic. In this raised end position, as shown in FIG.
Is set to have a slight gap with respect to the lower surface of the empty space.

The horizontal reciprocating revolving type cutting blade unit 3 constructed as described above is revolved by a pair of left and right turn cylinders 11, and the revolving angle is, as shown in FIG. Block-shaped stoppers 12, 1 on the right side of the main body 1 in the drawing, with the contact surfaces attached to the front and back with the horizontal reciprocating swivel-type cutting blade unit 3 being inclined surfaces.
3 The lower cutting blade 3L and the upper cutting blade 3U are both composed of a holder 3a and a blade 3b, and the blade 3b is attached to the holder 3a so that it can be replaced as needed.

Next, the hole punching device 4 with a separation mechanism will be described. As shown in FIGS. 4 to 7, the punching device 4 includes a base plate 14 as a mounting base fixed to the lower surface of the cavity of the upper die body 2, a punch holder 15 disposed on the lower surface side of the base plate 14. , a punch 16 fixed to the lower surface of the punch holder 15, baseplate
14 a cylinder 18 for advancing and retracting the lower surface and the punch holder chromatography (hereinafter referred to as cam) step with the cam plate as piercing division switching means disposed between the 15 upper surface 17 and the cam 17 for piercing classification Consists of

The punch holder 15 has a base plate 14.
And two guide rods 19 guide the vertical movement thereof, and a space between the upper surface and the lower surface of the base plate is the same as the pad stroke. It is interposed compression springs 21 the length compression deflection of is possible, thereby always (during top dead center of the slide) baseplate 14 below, as shown in (a) and of FIG. 7 (a) in FIG. 6 constant interval between the surface and the Panchiho <br/> holder over 15 top surface is adapted to be held.

On the lower surface of the punch holder 15, four spring mounting rods 22 are suspended, and a spring receiver 23 slidably mounted in each of the spring mounting rods 22 in the axial direction and a lower portion of the punch holder 15 are provided. A compression spring 24 having an initial compression deflection that is greater than a load generated when a compression deflection having the same length as the pad stroke is applied to the compression spring 21 is interposed between the compression spring 21 and the surface. The spring receiver 23 is placed on the upper surface of the pad 27 attached to the upper die body 2, and is set such that the tip of the punch 16 does not protrude from the hole of the pad 27 at the top dead center. The pad 27 is for holding the coil material 29 at the time of punching, and is arranged on the lower surface side of the upper die body 1 so as to cover the punching device 4 as shown in FIG. And supported by urethane rubber (not shown).

On the other hand, a cam 17 interposed between the base plate 14 and the punch holder 15 for switching the punch 16 is provided with a thick portion 17a for operating the punch.
And a thin portion 17b for resting the punch, and as shown in FIG.
When the thick portion 17a is located between the thin portion 17b and the thin portion 17b as shown in FIG.
When is located, punching is disabled. And cam 1
7 has a substantially U-shaped groove 2 extending horizontally.
5 are formed in the groove 25 and the base plate 14
The cam 17 is horizontally movably supported by slidably engaging a flanged guide rod 26 vertically provided on the lower surface of the cam 17. One end of the cam 17 is connected to a rod 18 of a cam moving cylinder 18 fixed to the lower surface of the base plate 14.
a.

The punching device 4 constructed as described above is a set of the punching device 4 and a predetermined number of the punching devices 2 are provided in the upper die body 2. In this embodiment, as shown in FIG. , Two sets each, a total of four sets are assembled.
In addition, a die 28 is provided on the lower mold body 1 side corresponding to the punch 16 of the hole punching device 4 as shown in FIGS.

This embodiment is constructed as described above, and its operation will be described below. When the slide of the press machine is at the top dead center, the upper die body 2, the upper cutting blade 3U of the horizontal reciprocating revolving cutting blade unit 3, and the punch 1 of the punching device 4
6 etc. are respectively located at the rising end. At this time, the horizontal reciprocating revolving type cutting blade unit 3 is revolved to either one and the stopper 12 or 13 with respect to the feeding direction of the coil material 29.
It is inclined at a predetermined angle determined by. Further, the punching device 4 is in either a punching operation state or a rest state. That is, in the punching device 4, (A) of FIG.
As shown in FIG. 7A, the thick portion 17a of the cam 17 is interposed between the base plate 14 and the punch holder 15 to be set in the operating state, or as shown in FIG.
The thin portion 17b is interposed between the base plate 14 and the punch holder 15 and set in a rest state.
During this time, the coil material 29 is fed by one pitch.

When the slide of the press machine is lowered in this state, first, the upper mold body 2 is pushed down, the coil material 29 is pressed onto the lower mold body 1 via the pad 27, and the coil material 29 is slightly pressed against the upper mold body 2. The upper cutting blade 3U holding a large gap is pushed down with the lowering of the upper die body 2,
The cutting operation of the coil material 29 by the upper and lower blade portions 3a is performed. At the same time, the base plate 14 of the punching device 4 is pushed down together with the upper die body 2, and if the punching device 4 is set to the operating state as described above, the punching device 4 is punched through the thick portion 17 a of the cam 17. Punch 16 with holder 15
Is pressed down to make a hole in the coil material 29.
Is set to the rest state, the punching device 4 compresses the compression spring 21 to the thickness of the thin portion 17 b of the cam 17, and the lowering operation of the base plate 14 is not transmitted to the punch 16 to suspend the punching.

However, the slide starts to rise after the bottom dead center, and when the upper die body 2 rises, the upper cutting blade 3U becomes free along with it.
1 is controlled, the cylinder 11 is operated, and the horizontal reciprocating revolving type cutting blade unit 3 is pivoted about the center pin 8 to a position where it comes into contact with the stopper 12 or 13 and is inclined to the opposite side. . On the other hand, in connection with this, the switching cylinder 18 of each punching device 4 is operated to move the cam 17 forward and backward, and when the punching device 4 is in the operating state, it is switched to the rest state. In the case of, switch to the operating state. During this time, the coil material 2
The substantially trapezoidal sheet material 30 cut from the hole 9 and punched out is pushed up by a lifter (not shown) and carried out of the die, thus completing the next preparation. Thereafter, the coil material 29 is fed by one pitch, and the above operation is repeated thereafter.

FIG. 8 schematically shows the above-described punching operation. In the n-th punching operation, the horizontal reciprocating revolving type cutting blade unit 3 is tilted to the lower right in FIG.
Is set to the operating state . The upper die descends in this state
Then, cutting by the revolving blade and punching by the left and right punch
Done. Their to, n + 1-th horizontal reciprocating pivoting cutting blade unit 3 is unshift operation of the inclined lower left, also the hole disconnect device 4 is set in the dormant state. Accordingly
At this time, only cutting by the revolving blade is performed,
Is not done. N in the n + 2 th of the punching operation of, et al.
Return to the first operation. By repeating such an operation, the substantially trapezoidal sheet materials 30 with holes are sequentially cut out one by one.

Since the turning angle of the horizontal reciprocating turning type cutting blade unit 3 is limited by the block-shaped stoppers 12, 13, it is easy to replace the stoppers 12, 13 with ones having different inclination angles. The turning angle of the horizontal reciprocating turning type cutting blade unit 3 can be changed.
In addition, if a movable stopper that can be repositioned separately from the illustrated stopper is disposed on the left side of FIG. 2 and is moved to a position that can function as a stopper and a rest position that cannot function, It is also possible to obtain sheet materials having different dimensions. Further, the number of the hole punching devices 4 is not limited to the four shown in the figure, and can be appropriately increased or decreased. It is also desirable that the mounting position with respect to the upper die main body 2 is detachable or movable.

[0022]

[Effects of the Invention] As described above, in the blank punching method of the present invention, the turning operation of the horizontal reciprocating turning type cutting blade unit and
By combining hole punching with a plurality of punching devices, a substantially trapezoidal sheet material with holes can be cut out one by one, and the punching device floats from the upper surface of the pad via an elastic body, and the upper die The cam plate moves forward and backward to the bottom surface of the punch with a certain distance between the bottom surface and the punch height, and the punch height is changed. As a result, it is possible to shorten the advancing / retracting stroke of the plate and obtain a compact punching device. As a result, the entire mold can be reduced in size and can be assembled to the press without difficulty. Also,
In the present invention, since punching can be performed at the time of cutting out the sheet material, it is possible to remove chips by washing the sheet at the time of subsequent drawing, thereby avoiding the adverse effect of the chips on drawing. be able to.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a blank material punching die according to an embodiment of the present invention, with a sectional position appropriately changed.

FIG. 2 is a top view of a lower die main body and a revolving cutting blade attached thereto.

FIG. 3 is a bottom view of the upper die main body and a punching device attached thereto.

FIG. 4 is a sectional view of a punching device.

FIG. 5 is a bottom view of the punching device.

FIG. 6 is an explanatory diagram showing an operation mode when there is a hole;

FIG. 7 is an explanatory diagram showing an operation mode when there is no hole.

FIG. 8 is an explanatory diagram showing an aspect of sheet material removal.

FIG. 9 is an explanatory diagram showing a state of sheet material removal by a conventional die release.

FIG. 10 is a sectional view showing a hole punching and separating mechanism of a conventional hole punching device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Lower die main body 2 ... Upper die main body 3 ... Horizontal reciprocating revolving type cutting blade unit 3U ... Upper cutting blade 3L ... Lower cutting blade 4 ... Hole punching device 11 ... Turn cylinder 12, 13 ... Stopper 16 ... Punch 17 ... With step Cam plate

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) B21D 28/24 B21D 28/26 B21D 28/34

Claims (1)

(57) [Scope of request for utility model registration] 1. A material blanking die for cutting a coil material fed at a constant pitch in a horizontal direction into a sheet material and punching a sheet material, wherein the material is vertically spaced at least so as to allow the coil material to pass therethrough. A main reciprocating upper and lower cutting blade that is movably supported and connected, has a center of rotation on the coil width center line, and is capable of reciprocating horizontally at a predetermined angle with respect to the coil feed direction for each cut. A revolving type cutting blade unit, corresponding to the horizontal reciprocating revolving operation of the horizontal reciprocating revolving type cutting blade unit, is lifted from an upper surface of a pad via an elastic body and is pressed down from an upper mold via an elastic body at a bottom of a punch. 1. A punching machine for punching out holes, characterized by comprising: one or more punching devices for punching by switching a punch height by moving a cam plate forward and backward.