JPS5815240B2 - Preski Kaiyouuchinukigata - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a punching device for a press that is attached to a press machine and punches out a magnetic thin plate such as a silicon steel plate.

BACKGROUND ART Conventionally, a stacking chute is widely used to take out thin sheet products that are continuously punched out by a punching die attached to a press machine.

FIG. 1 is a sectional view showing the main parts of a punching device using a stacking chute, in which 1 is a die, 2 is a die holder, and 3 is a die holder.
4 is a bolster, 4 is an underframe of a press machine, and 5 is a stacking chute attached with its upper end aligned with the upper surface of the bolster 3.

Product 6 punched by die 1 and punch (not shown)
are pushed by the punch and due to their own weight, pass through the die holder 2 and enter the stacking chute 5, and exit through this to the side of the press machine.

However, this has the following drawbacks. First, since the stacking chute 5 must pass between the legs of the underframe 4 or through a window or the lower end, the stacking chute 5 is larger than necessary, making installation and removal extremely troublesome.

Secondly, before the first product is punched out, it is necessary to put a dummy into the stacking chute, and after the punching is finished, it is necessary to take out the products remaining in the stacking chute. requires a lot of time.

Thirdly, even if it is desired to perform an initial inspection of the punched product or a sampling inspection of the product during the work, the product cannot be taken out from the stacking chute, so even if there is a defective product, detection of the defective product is delayed.

The object of the invention is to provide a punching device for a press machine that does not have the above-mentioned drawbacks.

Hereinafter, a punching device for a press machine according to the present invention will be explained with reference to the drawings.

Figure 2 shows a punching die and a series of devices for taking out the punched products, organizing them, and temporarily storing them, and Figure 3 shows a detailed cross-sectional view of the same. In the figure, 1 is a die having a hole for the punched product, 2 is a die holder, and 7 is a punch, and the die 1 and punch 7 constitute a punching die.

6 is a punched product, 8 is an electromagnet or a permanent magnet, and 9 is a cylinder made of a non-magnetic material.

The shape of the hole inside this cylinder 9 is made larger than the outer shape of the product, and this becomes the product hole of the cylinder 9.

A plurality of magnets 8 are arranged at intervals around the outer periphery of the cylinder 9, have lengths corresponding to the vertical direction of the cylinder 9, and are embedded in the die holder 2.

10 is a magnetic conveyor provided passing under the die holder 2, and 11 is a stacking device.

Since the punching device for a press machine according to the present invention is constructed as described above, the products 6 punched by the die 1 and the punch T sequentially pass through the die holder 2, ride on the conveyor 10, and are stacked on the stacking device 11.

To explain in more detail, the punched product 6 comes into contact with the inner surface of the die 1 near the upper cutting edge of the die 1 and does not fall under its own weight, but is pushed down by the products being punched one after another and falls into the die 1. When the clearance angle θ is reached, the friction around the product 6 gradually decreases, and one or more products fall down one upon another due to their own weight and enter the tube 9 of the die holder 2.

With this roof tile, the product 6 is attracted by the magnet 8 and becomes floating, and is also excited by the magnet 8, so that the facing surfaces of adjacent products become the same polarity and repel each other, so multiple pieces overlap. The products that fall are separated one by one and kept horizontal.

Then, as the punching progresses, it is pressed down from top to bottom,
When the number of products 6 held by the magnet 8 reaches a predetermined number and reaches the limit of the holding power of the magnet 8, the products 6 ride on the magnetic conveyor 10 starting from the lowest one, are carried by the conveyor, and are neatly transferred to the stacking device. They are piled up one after the other.

Figure 4 and below are plan views of Figure 3, but by incorporating the magnets 8 in two or more places depending on the shape or size of the product, it can be used not only for circular products but also for irregularly shaped products. .

Note that if the shape of the punched product and the arrangement of the magnets are appropriately selected using the magnetism of the magnet, for example, as shown in FIG. You can also take it out.

That is, in FIG. 7, a product 6 made of a magnetic steel plate is provided with four-sided notches, and magnets 8 are arranged so as to face and surround the notches.

As described above, in the punching device for a press machine according to the present invention, the punched products can be taken out one by one in a separated state, and when the magnetic conveyor and stacking device are combined, the products can be arranged in a stacked state. It can be stored temporarily.

Furthermore, the installation of the punching die makes the removal work, that is, the setup work, easier, and furthermore, since it can be taken out at any time to inspect the product, it is useful for early detection of defective products.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view showing the main parts of a conventional punching device;
The figure is a cross-sectional view of the main parts of the punching device according to the present invention, FIG. 3 is a detailed cross-sectional view of the punching device for a press machine shown in FIG. 2, and FIGS. 4, 5, and 6 are 3 is a plan view, and FIG. 7 is a plan view showing another embodiment of the present invention. In the figures, the same parts indicate the same or equivalent parts, 1 is a die,
2 is a die holder, 6 is a product, 7 is a punch, and 8 is a magnet.

Claims (1)

[Claims] 1. A punching die consisting of a punch and a die having a hole corresponding to the punch, for punching a thin sheet of magnetic material and dropping it into the hole; the thin sheet of magnetic material having a hole corresponding to the hole of the die and punched by the punching die; A cylinder made of a non-magnetic material is sequentially fed in, and a plurality of thin plates of magnetic material are arranged at intervals in the circumferential direction of the outer periphery of the armpit, and a plurality of thin plates of magnetic material are held in the cylinder at intervals, and the thin plates of magnetic material are a die holder provided in a step below the die, comprising an electromagnet or a permanent magnet having a length corresponding to the vertical direction of the cylinder, which causes the die to pass through the cylinder one by one and drop one by one when the number reaches a predetermined number; A punching device for a press machine, comprising a conveyor disposed below the die holder and driven by a drive unit to carry out a thin plate of magnetic material that has fallen from the cylinder.