JP3245935B2 - Press punching device and press punching scrap discharge method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a method for discharging swarf in a press die.

[0002]

2. Description of the Related Art FIG.
(B) As shown in (c), the weight was dropped, air was blown from a punch, and forced suction was performed from below.

[0003]

In the above prior art, as shown in FIG. 2 (a), a punch residue is put on the upper surface of the die. Also, as shown in FIG. 2B, the punched waste is clogged on the inner surface of the die. And the like, and this has led to breakage of the mold. According to the present invention, by forcibly wiping air from the obliquely drilled hole into the inner surface of the die, the removal of the waste in the mold is ensured.

[0004]

According to the present invention, there is provided a press punching apparatus comprising: a die for punching a workpiece; and a punching waste generated by the punching being directly air-fed to a die bush of the die along a discharge direction. A plurality of holes for ejecting, and a valve for varying the pressure of air ejected from the plurality of holes, the plurality of holes are provided obliquely with respect to the die bush, and with respect to the die bush It is characterized by being arranged uniformly over the entire circumference. Further, the press punching waste discharging method of the present invention is a method for punching a workpiece by a die, for a punching waste generated by the punching, being provided obliquely to a die bush of the die, and The pressure-adjusted air is directly ejected from a plurality of holes evenly arranged on the entire circumference along the carry-out direction of the punched waste.

[0005]

The scum generated by press punching is forcibly carried out of the mold by forcibly wiping air from a hole formed obliquely in the die bush.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 3A shows a state in which a workpiece is punched by a pair of upper and lower blades. The punched waste enters the die bush, and at this time, air is forcibly supplied from outside the mold to carry the waste downward. The die bush is provided with an obliquely drilled hole. The angle of the hole is set within 10 ° to 80 ° so that the air flow is downward. If it is set out of this range, the effect of scrap discharge is lost. Further, if the effect is not sufficient when the number of holes is one, as shown in FIG. It can be effective. Also, in order to achieve a greater effect, 1 ° ~
The effect is increased by performing the 2 ° taper processing. Accordingly, no scrap is present in the mold, and the mold is reliably carried out of the mold. In particular, this method is effective in a small hole shape of φ1 mm or less, and exhibits a sufficient effect also in high-speed pressing.

Although it is not necessary to pay much attention to the air pressure, provision of a valve capable of varying the pressure from 0.5 kg to 5 kg enables use under more optimal conditions.

[0008]

According to the present invention, the holes for ejecting air are provided obliquely to the die bush, so that air can be continuously ejected to the punching waste in the carrying-out direction. In addition, since a valve capable of adjusting the air ejection pressure is provided, it is possible to adjust the air ejection pressure according to the material and shape of the punched waste. Further, a plurality of holes for ejecting air are provided in the die bush and are evenly arranged on the entire circumference, so that air can be uniformly ejected from all over the punched scum, and the punched scum is made of gold. It does not stay at a specific position in the mold. This allows the punched waste to be reliably transported to the outside of the mold by the above-described synergistic action, and troubles caused by floating and clogging of the cut waste can be avoided, so that damage to the mold can be prevented. Therefore, high-speed and stable press punching can be realized, which can contribute to cost reduction.

[Brief description of the drawings]

FIG. 1 (a) is a view showing the removal of the dead weight by its own weight. (B) The figure which shows the air wiping from a punch. (C) The figure which shows forced suction.

FIG. 2A is a view showing a state in which a scrap is mounted on a top surface of a die. (B) The figure which shows the state in which the scum was clogged on the inner surface of the die.

FIGS. 3 (a) and 3 (b) are views showing a state in which air is blown into a mold according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Workpiece material 2 Debris 3 Die bush 4 Punch 5 Die plate 6 Backing plate 7 Die holder 8 Air base 9 Air pressure adjustment valve

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B21D 28/00 B21D 28/34

Claims (2)

(57) [Claims] 1. A die for punching a workpiece, a plurality of holes for directly blowing air to a die bush of the die along a discharge direction of the punch waste generated by the punching; A valve that varies the pressure of air ejected from the holes, wherein the plurality of holes are provided obliquely with respect to the die bush, and are evenly arranged around the entire periphery of the die bush. And press punching equipment. 2. A workpiece is punched by a die, and a punched waste generated by the punching is provided obliquely with respect to a die bush of the die, and is evenly disposed around the die bush. A method for discharging punched swarf, characterized in that air with adjusted pressure is directly ejected from the plurality of holes along the direction in which the punched swarf is discharged.