JP2521497B2 - Product take-out method and device in punching press by progressive compound type - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for taking out a product in a progressive compound type, for example, a continuous punching press for punching the inner and outer contours of an annular body at the same time.

Conventional technology To take out the product, use the upper mold knockout while the press is rising, or place the product on the skeleton, or lift the product while it is still inside the upper mold, and knock it out near the top dead center. There is a method to push the product down.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention A continuous punching press that punches the inner contour of a product from a strip-shaped sheet material by a compounding punching press in a single step to drop the punching scrap (scrap) inside the product downward. The product was taken out by pushing it up above the skeleton near the top dead center of the press and putting it in the mold from above the skeleton, or by using another device such as a robot. Since the product was taken out from above the skeleton in this manner, the product was dropped from the skeleton and the product processing could not be performed below, so the work was not easy.

Means for Solving the Problems In punching by a punching press with a progressive compounding die for punching the inner contour of a ring-shaped product from a strip-shaped sheet material supplied by a feeding device to the punching press in one step, the product is cut from the sheet material. At the same time, when punching, the both side edges of the punched sheet material (skeleton) of the product are crushed in a concave shape, the inner diameter of the skeleton punching hole in the feed direction is made larger than the product diameter, and the product is lightened in the hole. After fitting, the product was pushed down from the punched hole and dropped in the next step, and the product was taken out from below the skeleton.

Action The strip-shaped sheet material 1 is supplied to the punching press 2 by the feeding device, and when the inner and outer contours of the annular product 16 are punched from the sheet material 1 in one step, at the same time, the product 16 is punched out (skeleton ) Both side edges are crushed in a concave shape with a crushing punch 15 provided in the punching press 2, and the skeleton 17 has a punching hole 19
Of the product is stretched in the feeding direction, the inner diameter of the punching hole in the feeding direction is made larger than the diameter of the product 16, the product 16 is lightly mixed in the punching hole, and the upper die set 3 is lowered in the next step. At the same time, at the same time, the dropping plate 8 provided in the die set presses the product 16 lightly fitted in the punching hole 19 to drop it downward.

EXAMPLE An example of the present invention will be described with reference to FIG.
The strip-shaped sheet material 1 wound into a coil is supplied to the punching press 2 by a feeding device (not shown) in a state of being straightened through rollers and a leveler.

The upper die set 3 of the punching press has a center hole punch 4,
A die 5, a knockout 7 supported by a spring 6 and a product dropping plate 8 are provided, and a bolster 9 of the press has a lower punch 1 on a base plate 11 supported by a column 10.
2. A stripper 14 supported by a spring 13 and a crushing punch 15 are provided. The strip-shaped sheet material 1'is supplied in a dotted line state to the lower punch 12 by the feeding device to the punching press 2 provided with the progressive feed compound die configured as described above, and the dotted line-shaped sheet material 1'is supplied to the upper die. When the die set 3 descends, it is elastically pressed onto the lower punch 12 by a knockout 7 through a spring 6 with a pressure adjusted and set in advance. Further, when the upper die set 3 is lowered, the sheet material 1 ′ is pressed against the lower punch 12 by the knockout, and the center hole punch 4 and the die 5 and between the lower punch 12 and the stripper 14 form the annular product 16 inside and outside. The contours are punched at the same time, the sheet material 1 descends to the solid line state, and the punched sheet material 1, that is, the skeleton 17 is spring-loaded to the base plate 11.
It is elastically supported by a stripper 14 via 13. The punched product 16 is supported on the lower punch 12, but the punching scraps, that is, the scraps 18 inside the product 16 fall onto the bolster 9 below. Simultaneously punching out the inner and outer contours of the annular product, at the same time as shown in FIGS. 2 and 3, the A parts of the sheet material 1 on both outer sides of the product 16 are erected for crushing on the base plate 11. The sheet material 1, that is, the skeleton 17 crushed and punched by the punches 15 and 15 and the die 5 is stretched in the feeding direction. By stretching this material in the feed direction, the diameter of the punching hole 19 of the skeleton 17 becomes slightly larger than the outer diameter of the product 16, and the product 16 can easily pass through. However, the diameter of the punching hole 19 of the skeleton 17 does not increase in the direction perpendicular to the feeding of the material.

When punching is completed, the center hole punch 4 and the die 5 separate from the sheet material 1 as the upper die set 3 rises, but the skeleton 17 is pushed back upward by the stripper 14 biased by the spring 13. In this state, the product 16 is pressed against the upper surface of the lower punch 12 via the knockout 7 biased by the spring 6.
As a result, the product 16 is lightly fitted into the punching hole 19 which is stretched and expanded in the feeding direction of the skeleton 17.

In this state, when the lifting of the upper die set 3 is completed,
The knockout 7 is separated from the upper surface of the product 16, and the skeleton 17 is moved together with the sheet material 1 to the unloading side by one pitch while the product 16 is fitted in the punching hole 19.

After this movement is completed, the punching work is started by lowering the upper die set 3 again.
The product 16 fitted in the punching hole 19 of the skeleton 17 comes to the position of the product separating device 20 every time the is moved by one pitch. At the same time, the plate 16 for dropping the product 16 separates the product 16 from the punching hole 19 of the skeleton 17 and drops it on the bolster 9 below in the vicinity of the center hole punch 4 and the die 5 reaching the descending end in the next step. . The product 16 dropped below can be processed below.

As described above, when the work of taking out the product 16 downward is completed during the punching work of the press and the upper die set 3 having the center hole punch 4, the die 5 and the knockout 7 is completely lifted, the feeding device makes a strip shape. Sheet material 1 and skeleton 17 are 1
After the pitch movement, the punching press work and the downward pushing work of the product 16 are performed again, and the above two works are repeated every one reciprocating motion of the upper die set 3 of the punching press 2 to form a strip shape. Both the sheet material 1 and the skeleton 17 move to the carry-out side by one pitch.

EFFECTS OF THE INVENTION Conventionally, a strip-shaped sheet material 1 wound in a coil shape is supplied onto a die by a coil unwinding device and a feeding device, and an annular product is continuously punched from the sheet material by one step of simultaneous inner contour cutting, Punching chips inside the punched annular product,
That is, the scrap was dropped and processed. However, it was difficult to drop the annular product by dropping it from the skeleton 17 after punching. That is, the fourth
As shown, the punched product 16 is a skeleton
It collided with the punched hole 19 of 17 and became almost impossible to pass through, and it was difficult to drop the product 16 downward.
Therefore, since the product is taken out from above the skeleton 17, it is necessary to put a hand in the mold or use a robot, so that the product processing is not easy.

By the way, in the present invention, the crushing punch 15 is placed on the base plate 11.
When the annular product 16 is punched out of the sheet material 1 in the inner and outer contours in one step, the portion A of the sheet material 1 is concave between the die 5 of the upper die set 3 and the crushing punch 5 at the same time. Crushed into By crushing the portion A into a concave shape, the material of the sheet material 1 from which the product 16 has been extracted, that is, the skeleton 17, extends in the feed direction, and the punching hole 19 has its inner diameter in the feed direction as shown in FIG. The larger size makes it easier for the product 16 to pass through the perforations 19 in the skeleton 17. Then, in the next step, the product 16 lightly fitted in the punched hole 19 was dropped by dropping the dropping plate 8. In this way, the inner punching scraps, that is, the scrap 18 and the product 16 can both be dropped downward from the strip-shaped sheet material 1 and the processing of both can be done at a lower level, so that the operation is extremely easy, which is a remarkable effect. It was played.

[Brief description of drawings]

FIG. 1 is a side view of a state in which an annular product is punched by a punching press, FIGS. 2 and 3 are rear views and side views of a state in which an annular product is punched from a strip-shaped sheet material, and FIG. The drawing is an enlarged cross-sectional view showing a state of a skeleton punching hole and a peripheral edge of a product in a state where the product is punched above the band-shaped sheet material. In the figure, 1 is a band-shaped sheet material, 2 is a punching press, 3 is an upper die set, 4 is a center hole punch, 5 is a die, 7 is a knockout, 8 is a drop plate, 9 is a bolster, and 11 is a base plate. , 12 is lower punch, 14 is stripper, 15 is crushing punch, 16 is product, 17 is skeleton, 18 is scrap, 19
Is a punching hole, 20 is a product separating device, and 21 is an abutting part.

Claims (3)

(57) [Claims] 1. In a punching by a progressive feed compound die for feeding a band-shaped sheet material to a punching press by a feeding device and punching the inner and outer contours of the product in one stroke by the operation of the press, the punching of the product from the sheet material is performed. At the same time, both side edges of the sheet material (skeleton) in which the product has been punched are crushed in a concave shape, the sheet material is stretched in the longitudinal direction, and the dimension of the punched hole in the sheet material in the longitudinal direction is increased, The product is fitted into the punching hole, and the product is pushed down from the punching hole and dropped in the next process, and the product is taken out from below the skeleton. How to take out the product in the punching press. 2. A punch press using a progressive compound mold according to claim 1, wherein concave punching of both side edges of the sheet material punched with the product is performed by punching punches of the punching press. To take out products in Japan. 3. A lower hole of a movable upper die set is provided with a center hole punch for punching out an inner contour of an annular product, a knockout for pushing out the product through a spring, and a die for punching out the outer contour of the product. In addition, on the lower surface of the die set, a drop plate is provided on the lower surface of the die set to press and drop the product from the punch hole of the skeleton in the next step, and on the base plate on the upper surface of the press bolster to counter the knockout. A lower punch that mounts and forms the product, a stripper that resists the die through a spring, and a crushing punch that crushes both side edges of a strip-shaped sheet material (skeleton) with punched holes of the product in a concave shape are provided. , The inner and outer contours of the annular product are punched from the strip-shaped sheet material supplied by the feeding device in one step, and at the same time, both side edges of the skeleton punching hole are punched by the crushing punch and the die. The skeleton punching hole to increase the inner diameter of the punching hole in the feed direction, and in the next step, the dropping plate is fitted into the punching hole of the skeleton to drop the product downward. Pressing machine.