JPH1044099A - Punched trash removing device in punching processing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To introduce compression air into a die part by dexterously making use of a part of a narrow structure, removing and dropping punch dust in association with a punching operation to forcibly absorb the dust into the hole thereby removing the dust with certitude. SOLUTION: A notch part 3 is formed in the intermediate position of an external side of a die button 2 incorporated in a die 1, an air ejection hole 5 with a small diameter is projected so that a acute angle is formed with respect to an axial line a toward an exhaust side of a trash drop hole 4 of the die button 2. With respect to this air injection hole 5, an air supply channel is communicated from an outside of a die support plate 11. In association with a punching operation of a punch head compression air is supplied to the air injection hole and at the same time, a load space is formed which allows an absorption force to act on a punch trash from the rear of the jet hole 5' of the air injection hole 5 up to the punch hole 2' of the die button 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a punching die (generally referred to as a die button) formed by punching out a sheet material to be processed in a press machine or the like.
The present invention relates to a punch chip removing device in a punching machine capable of rationally preventing clogging inside a die button and promoting improvement in workability.

[0002]

2. Description of the Related Art To form a punched hole in a sheet to be processed such as a metal plate, a processing machine such as a punch press is used.
In this punch press machine, an operation is performed in which a sheet to be processed is sandwiched between a die button having a hole of a required size and a punch incorporated in a die provided on a die set. At this time, the punched chips are usually discharged downward through a hole penetrating the die button in the axial direction.

[0003] However, the punch chips punched by the punch press are gradually clogged in the drop holes cut out from the die hole of the die button by the continuous punching operation, or stick out to the end face of the punch. A phenomenon occurs, which impairs the punching operation and causes problems such as scratching the work. For this purpose, many studies have been made on the occurrence of this kind of phenomenon, and various attempts have been made on the relationship between the chip at the time of the punching operation and the inner peripheral surface of the die hole and the chip hole.

[0004] Examples of attempts to solve such problems include pitting holes formed by punching dies from punch holes of a die,
The internal shape up to the discharge hole is examined in various ways, and the shape is set so that the dust does not remain due to the oil or a bridge is formed inside the hole to prevent dropping of the chip. Alternatively, an attempt has been made to partially blow out air to blow off the dust and discharge the air.

[0005]

However, even if the internal shape of the falling and discharging space of the chippings from the die to the die set as described above is improved in various ways, the fats and oils adhering to the work to be handled are not removed for a long period of time. With the use of the machine, the chips that gradually adhere to the inner surface of the hole and fall and are prevented from falling by the oils and fats, and the accumulation of the chips will eventually hinder the subsequent chips from falling. Injecting air into the spill hole is apparently more effective than the former method.However, since air must be provided in a very narrow space, conventional air is blown. It turned out that the effect of positively eliminating punching debris cannot be expected by just thinking.

The present invention solves such a problem, and introduces compressed air to a die portion by using a part of the structure even in a narrow portion, and cooperates with a punching operation. It is an object of the present invention to provide a dust discharging device having a function of forcibly sucking and reliably removing dust from a punched hole.

[0007]

In order to achieve such an object, a punch debris removing device in a punching machine according to the present invention is provided with a cutting device at an intermediate position on an outer surface of a die button incorporated in a die of the punching machine. A notch is formed, and a small-diameter air injection hole is drilled from the notch toward the discharge side of the chipping hole of the die so as to be extremely acute with respect to the axis. The air supply path is communicated with the hole from outside the die support plate, and compressed air is supplied to the air injection hole in conjunction with the punching operation of the punch head, and the air outlet of the air injection hole is A negative pressure space is formed between the back and the punch hole of the die to apply a suction force to the chip.

In the present invention, it is preferable that the piercing angle of the air ejection hole is in a range of 9 to 15 degrees with respect to the axis of the spill hole of the die.

[0009]

The punching chip discharging apparatus of the present invention having the above-described structure is arranged so that compressed air passes through an air supply passage through an air injection hole provided in a die button incorporated in the die in conjunction with the punching operation of the punch head. When air is supplied, the air that is jetted from the air injection hole into the spill hole is jetted along the axis of the spill hole. The jet flows at high speed. As a result, the space formed behind the air outlet becomes negative pressure, and the punched hole that is punched by the punch and the punch hole of the die and enters the inside of the die button instantly exerts a large suction force on the lower surface. Receiving it, it is quickly drawn into the drop hole side that is scraped by the differential pressure from the punch side and falls. In addition, the punching dust that drops by suction is sent to the discharge hole as it is on the jet stream, and it is reliably removed without leaving the narrow chipping hole, which hinders continuous punching work. I can't.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a punch residue removing apparatus in a punching machine according to the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view of a main part of a specific example of a punch debris removing apparatus according to the present invention. FIG. 2 is an enlarged sectional view of a main part.

As shown in these figures, in the present embodiment, a die button 2 incorporated in a die 1 of a punching press machine has a part of its outer surface cut at an acute angle with respect to a punching axis a. In addition to providing the notch 3,
An air injection hole 5 is formed at a remarkably acute angle θ with respect to the punching axis a from the notch portion 3 toward a swarf drop hole 4 penetrating the axis. Is used in which an air supply groove 6 is provided on a side surface portion close to.

For such a die button 2, a die 1
In the fitting portion of the die button 2, a space 7 is formed in a part of the embedding hole so that the air supply groove 6 communicates with the air injection hole 5 of the die button 2. The die support plate 11 attached to the die 1 has an air supply groove 6 provided on the die button 2 on the surface.
A ventilation groove 12 is engraved so as to be able to communicate with the ventilation hole 12, and a ventilation hole 13 opened on the side surface of the die support plate 11 communicates with the ventilation groove 12.
The air supply pipe 15 can be connected to the air supply pipe 15 through a joint 14 attached to the air supply pipe.

A ventilation groove 1 communicating with the ventilation hole 13 on the surface.
When the die 1 is attached to the die set 20 via the die support plate 11, the die 2 is covered by the bottom surface of the die 1 so as to form an airtight air passage. The air supply pipe 15 is connected so that compressed air is supplied in conjunction with operation of a punch head of a press (not shown).

The punch debris removing apparatus having the above-described structure is configured to supply a workpiece by a well-known means and to punch out a predetermined hole by the punch 16 and the die button 2 sequentially. The air injection holes 5 provided in the die button 2 from the die support plate 11 in conjunction with the operation of
The compressed air is fed into the air injection hole 5 through the air passage (vent groove 12), the air supply groove 6 and the space 7 leading to the air jet hole 5, and is jetted to the draft hole 4. Then, since the air injection hole 5 is provided at an extremely sharp angle with respect to the axis of the swarf drop hole 4, the jet of the injected compressed air flows at a high speed along the axis, and as a result, behind the jet. A large negative pressure is generated in the space B inside the die button 2 located.

Draft drop hole 4 in this die button 2
In, the compressed air is injected along the axis,
The space B between the punch hole 2 'of the die button 2 behind the jet flow and the jet port 5' becomes negative pressure, and at the same time when the punch 16 punches the work, the die chip b generates the die button. Since the second punch hole 2 'is in a sealed state, the negative pressure acts as a suction force on the lower surface of the punched chip b as much as possible. Therefore, when the punch 16 rises and comes out of the punch hole 2 ', the punch 1
6, the suction force acting on the lower surface is significantly greater than the suction force on the upper surface of the chippings b.

Further, the swarf b that falls into the swarf drop hole 4 in the die button 2 is discharged to the outside through a discharge hole 18 provided in communication with the die set 20 by a jet of compressed air. It is processed without staying in the hole. Of course, it does not adhere to the wall surface of the chipping hole 4 in the die button 2 or the inside of the punch hole 2 '. Therefore, there is no hindrance to the continuous punching operation, and there is naturally no danger of adhering to the punch 16 and damaging the work side.

In this embodiment, the angle θ is set for the air injection hole 5 drilled into the drop hole 4 that is cut out from the notch 3 on the side surface of the die button 2. In doing so, it is most preferable that the angle is as close to 0 ° as possible with respect to the axis a of the die button 2, but it is impossible to work, and as a result of various experiments, the drilling angle θ is 9 to 15
It is preferable that the angle is in the range of about 10 °, and the diameter of the air injection hole 5 is about 1 mm in terms of workability, and it is good in terms of work and the effect of removing dust. However, these numerical values do not limit the present invention.

As described above, the punch debris removing apparatus according to the present invention has a structure capable of generating an air jet so that a strong negative pressure space is formed immediately below the punch hole 2 'of the die button 2. As a result, the chippings b are sucked at the moment when they enter the punch holes 2 ′ of the die button 2 to promote the initial drop, and are sent out to the chipping discharge holes 18 leading to the die set side by being put on the jet flow. Thus, the conventional problems can be solved.

[0020]

As described above, according to the present invention, a compressed air supply mechanism is formed rationally in a die of a punch press machine so that a more effective function can be exhibited with a simple configuration. In addition, it is possible to increase the economic efficiency without complicating the structure of the mold, and to contribute to the improvement of the quality of the product.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part showing one specific example of a punch debris removing device in a punching machine according to the present invention.

FIG. 2 is an enlarged sectional view of a main part of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Die 2 Die button 2 'Die punch hole 3 Notch portion 4 Draft drop hole 5 Air injection hole 5' Air injection port 6 Air supply groove 7 Space 11 Die support plate 12 Vent groove 18 Drain discharge hole a Axis line of chipping hole (die) b Punching chip B Space part

Claims (2)

[Claims] 1. A notch is formed at an intermediate position of an outer surface of a die button incorporated in a die in a punching machine, and an axial center is formed from the notch toward a discharge side of a chipping hole of the die. A small-diameter air injection hole is formed so as to be extremely acute with respect to the line, and an air supply path is connected to the air injection hole from the outside of the die support plate. The compressed air is supplied to the air injection holes, and a negative pressure space is formed between the back of the air injection holes and the punch holes of the die to apply suction force to the chips. A punch debris removing device for a punching machine. 2. The punch chip removing apparatus according to claim 1, wherein the air ejection hole has a drilling angle in a range of 9 to 15 ° with respect to an axis of a chip chip hole.