JPS5825530B2 - How to remove cut pieces in a punch press machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for removing cut pieces in a punch press machine.

In Fig. 1, when drilling a rectangular hole 2 in a thin plate workpiece 1, press continuously along the rectangular line of the thin plate 1 placed on the punch press machine stand, and press the rectangular line one time. At this time, a predetermined hole 2 is formed.

At this time, the workpiece 1 vibrates due to the large impact force generated when the press tool is operated, and a cut piece 3 having the same shape as the punched hole 2 passes through the hole 2 and is attached to the bottom surface of the workpiece 1 at the hole 2 in Figure 1. It may be located as follows.

That is, the corner 4 of the cut piece 3 is blocked by the lower surface of the workpiece 1, and the cut piece cannot be removed as it is.

When the cut pieces 3 accumulate at the bottom of the workpiece 1 in this way,
It is necessary to promptly remove the punched cut piece 3, since it becomes an obstacle to the movement of the workpiece or the cut piece and the workpiece are simultaneously punched out during press working, causing an overload on the tool.

The present invention has been made to solve the above-mentioned disadvantages, and will be described in detail below with reference to the drawings.

In Fig. 2, press working starts from one point A of a thin plate-shaped workpiece (I), and processing proceeds along a predetermined shape (I).
), (III), that is, before punching out the last point, the suction cup 5 is pressed against the rectangular plate 3 that is to be the cut piece, and in this state, the final pressing is performed (IV).

That is, a predetermined hole has been drilled in the workpiece 1, and the cut piece 3 is attracted to the suction cup, so the rod 6 holding the suction cup 5 is lifted slightly upward as shown by arrow B to remove the cut piece 3.
When the cut piece 3 is moved in the direction of arrow C at a place away from the workpiece, the cut piece 3 is separated from the workpiece and carried out.

Note that, as the suction cup 5, a known suction means such as a suction gun or an electromagnet using suction air flow is sufficient.

Furthermore, if the movement of the suction cup to the suction position, suction, and unloading operations are incorporated into the press machine controller, they can be easily linked with press processing.

As described above, according to the present invention, when punching a hole of a predetermined shape, the suction cup is positioned at the position of the workpiece to be cut out immediately before the completion of punching, and the final pressing operation is performed after holding the workpiece by suction. Pieces can be carried out reliably without passing through the holes and accumulating at the bottom of the workpiece.

[Brief explanation of drawings]

Figure 1A is a sectional view showing the state of the cut piece when a hole is drilled by the conventional method, the opening in Figure 1 is a plan view of the same, and Figure 2 shows the method of pressing and removing the cut piece by the method of the present invention. It is an explanatory diagram. 1... Thin plate-shaped workpiece, 2... Hole, 3
...Cut piece, 5...Suction cup.

Claims (1)

[Claims] 1. In a punch press machine that punches a hole of a predetermined shape in a thin plate-shaped workpiece, press processing is performed continuously along the hole shape, and a suction cup is positioned at the position of the workpiece to be cut out just before the end of the press work. A method for removing cut pieces in a punch press machine, characterized in that after the above-mentioned position is held by suction, a final pressing process is performed and the cut pieces are carried out from a drilled hole.