JPH0739598Y2 - Vibrator mold - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a die for punching a plastic plate material,
In particular, vibration energy is used to apply vibration to the punch or holder to convert the vibration energy into heat energy, and the generated heat softens the work piece to perform drilling, cutting, etc. Regarding

(Prior Art) Such a vibrator die is disclosed in, for example, Japanese Patent Application Laid-Open No. 62-203799 filed by the applicant. This is known as a mold with a good finished surface accuracy. And in such a vibrator die, when a large amount of punching is performed in an automation line, etc., a large amount of punching powder is generated, and the punching powder is released from the clearance between the punch and the holder. However, the sliding stroke was reduced and the guide part was worn. That is, in a normal press without an exciter, the lower punch (for example, the lower punch 1
3) There is no upper punch (for example, upper punch 3 in the drawing)
Descends, enters the hole of the lower holder, shears the workpiece, and drops scrap or product (hereinafter referred to as scrap) downward, so that a large amount of such punching powder is not generated. Therefore, in a normal press, since it is only necessary to process the scrap pushed out by the upper punch, the scrap is ejected by the weight of the scrap toward the outlet below the lower holder while being urged by the punch descending speed. Bad!
Further, in JP-A-62-176794, the punching holes are minute, and when the punch speed is high, the negative pressure when the punch rises causes the scrap to be sucked up. There is disclosed a device in which a suction device or a small vacuum generating device is provided by compressed air provided or below the lower holder so that scrap is sucked and dropped and discharged downward.

(Problems to be Solved by the Invention) However, as a problem peculiar to a press having a vibrating machine, the upper and lower punches (3, 13) are used to process a workpiece (for example, the workpiece 1 in the drawing).
6) is clamped from both sides and vibrated for punching, but since there is a lower punch, it cannot be punched as it is.
The scrap is rejected after it is moved to the next process together with the work piece. However, since punching is performed by vibrating with the upper and lower punches, a large amount of powdery scraps are generated in addition to scrap. This powder-like punched dust (hereinafter referred to as "dust dust") is generated in the vicinity of the work piece and passes through the clearance between the tip of the punch and the hole of the complementary shape to enter the inside of the die consisting of the punch and the holder. Harm occurs. Dust powder near the work piece can be easily removed by air blow, etc., but dust powder that has entered the mold, especially the sliding parts (31, 32) and gaps (29, 30) of the punch and holder, It is difficult to remove by simply extruding with compressed air or sucking with vacuum. For example,
As shown in the figure, even if the dust powder is forcibly sucked by providing the suction ports (9, 9) opening in the gap (30) between the lower punch plate (12) and the lower holder (14), Once it entered, it was difficult to completely remove it, and it was necessary to remove the mold periodically and disassemble and clean it.

The object of the present invention is to eliminate the above-mentioned drawbacks of conventional products.Even if a large amount of punching is performed in an automated line, etc., the dust powder generated by the vibration punching can be efficiently removed, and in particular, in the die,
An object of the present invention is to provide a vibrator die that prevents dust from entering the sliding portion or the gap between the punch and the holder.

(Means for Solving the Problems) Therefore, in the present invention, in a mold for a vibrator having upper and lower punches and a holder, a complementary shape hole (hereinafter referred to as punch fitting) is formed in a tip of the upper punch in the upper holder. A scrap reservoir is formed on the upper part of the hole) so as to surround the upper punch, and a gradually increasing diameter portion that gradually increases in diameter from the upper punch fitting hole toward the scrap reservoir is provided. In addition, an air blowout hole is provided in the upper part of the upper holder, and an air outlet hole is provided in the lower part of the upper container to communicate with the outside of the holder. Further, an airtight seal provided between the upper holder and the upper punch is provided on the upper part of the waste container.

Further, in the lower holder, a scrap reservoir surrounding the lower punch is formed below the lower punch fitting hole of the lower holder, and a gradually increasing diameter portion is provided which gradually increases in diameter from the lower punch fitting hole toward the scrap reservoir. . In addition, the bottom of the waste sump is formed as a slope, and a discharge port is provided downward. Furthermore, the above-mentioned problem is solved by providing an airtight seal interposed between the lower punch plate that forms the lower portion of the residue storage and the gap between the lower holder.

(Function) The powdery punched dust powder generated by punching by vibrating with the upper and lower punches enters the clearance between the punch and the punch fitting hole, but the dust powder that has entered the upper mold side accompanies vibration. Further toward the upper part, it stays in the dregs reservoir through the gradually increasing diameter portion. Further, since the gradually increasing diameter portion is provided, even if the punch vibrates, the dust powder is efficiently discharged to the dust reservoir, and the dust powder generated at the periphery of the dust reservoir and the punch fitting hole is good and there is little galling or the like. . Further, compressed air can be supplied into the dregs reservoir from the air blowing hole, and the dregs powder in the dregs reservoir can be discharged from the dregs discharge hole together with the compressed air. Further, since the sliding portion between the upper holder and the upper punch is covered with the airtight seal, dust particles do not further enter the mold.

Further, the dust powder that has entered the lower mold side moves downward due to the vibration and drops into the dust reservoir through the gradually increasing diameter portion. Further, since the gradually increasing diameter portion is provided, even if the punch vibrates, the dust powder is efficiently discharged to the dust reservoir, and there is little galling due to the dust powder generated at the periphery of the dust reservoir and the punch fitting hole. In addition, since the bottom of the dregs reservoir has a slope, the dregs can be easily discharged by dropping. Further, the airtight seal prevents dust from entering the gap between the lower punch plate and the lower holder, and the sliding portion between the lower holder and the lower punch inside the die.

(Embodiment) Next, a metal mold for a vibration exciter according to an embodiment of the present invention will be described with reference to the drawings showing a cross-sectional view of a main part thereof. The vibrator die is a pair of upper and lower punches (3, 13) having a tip shape that matches the shape of the holes to be machined, which are arranged on both sides of the workpiece (16).
And a punch fitting hole (2
0) with a pair of upper and lower holders (6, 14). In the embodiment, the lower holder (14) is fixed on the main body (24),
The work piece (16) is mounted so as to be placed, and the upper holder (6) is supported by the main body (24) and is not shown in the first figure.
The hydraulic cylinder is capable of moving up and down along the guide post (7) and pressing and clamping the workpiece (16) with the lower holder (14). In the embodiment, the upper punch (3) has the guide holes (2) provided in the upper holder (6).
The upper knockout plate (1) is fixed to the upper knockout plate (1) guided by the guide pin (2) fitted in 1), and the upper knockout plate (1) is supported by the second hydraulic cylinder (not shown) supported by the main body (24). The work piece (16) can be vertically moved and can be clamped and clamped between the work piece (16) and the lower punch (13). The lower punch (13) has a lower guide pin (1) fitted in a guide hole (22) formed in the lower holder (14).
0) is attached to the lower knockout plate (11), and the lower end (23) is attached to a vibrating and punching feeding device (not shown) supported by the main body (24).

Then, in the actual processing, the upper holder (6) descends in the illustrated state to press and clamp the workpiece (16) between the lower holder (14) and the lower punch (13) at the illustrated position. After being stopped, the upper punch (3) descends and the lower punch (13)
After the workpiece (16) is clamped between the workpiece (16) and the not shown vibration and punching feed device are operated, the workpiece (16) is
After the vibration is applied to the lower punch (13), the lower punch (13) pushes the upper punch (3) and ascends, punching feed is applied, and the hole is punched. After the hole is punched, the upper and lower punches are once returned to the surface position of the work piece, and the punched part (for example, scrap) is fitted back into the work piece. After that, the part which has been sent to the next process and punched out by the feeding device is rejected.

In the present invention, adjacent to the punch fitting hole (20), the upper and lower holders (6, 14) are provided with waste reservoirs (25, 26) surrounding the upper and lower punches (3, 13), respectively. Hole (2
0) and the residue reservoir are provided with gradually increasing diameter portions (18, 19) that gradually increase in diameter toward the residue reservoir. In addition, an air blowout hole (17) is provided on the upper part (5) of the upper holder (6).
An airtight seal (5) is provided on the upper end portion of the residue (25) of the upper punch (3) so as to be slidable on the outer periphery of the upper punch. Further, the upper surface of the lower punch plate (12) forming the residue pool (26) is formed with a slope having an angle of about 10 ° to 70 °, and discharge ports (28, 28) are provided downward from the lower end of the slope. ing. An airtight seal (27) is provided so as to cover the gap (30) between the lower punch plate (12) and the lower holder (14),
Further, on the side of the lower punch plate (12), holes (9, 9) which are open to the gap (30) and communicate with the lower outlets (28, 28) are provided.

In operation, when the workpiece (16) is clamped by the upper and lower holders (6, 14) and the upper and lower punches (3, 13) and then vibration is applied to the workpiece (16) through the lower clamp (13), As a result, dust is introduced into the mold through between the tip of the punch (3, 13) and the punch fitting hole (20). The dust powder that has entered the upper punch (3) and the upper holder (6) is accumulated in the dust reservoir (25), but when air is supplied from the air blow hole from the outside, it passes through the discharge hole (8) and goes out of the upper holder. Is discharged.

The dust powder that has entered the lower punch (13) and the lower holder (14) accumulates on the lower punch plate (12) that forms a dust reservoir (26), but the lower punch plate (12) has an angle of about 10 ° to 70 °. Since there is a slope of °, the dust powder will go down along the slope,
It became easier to fall and was discharged well.

The waste sump (25, 26) is very adjacent to the punch fitting hole (20),
Since a gradually increasing diameter part (18, 19) that gradually increases in diameter toward the dust reservoir is attached, dust powder efficiently accumulates in the dust reservoir due to the vibration of the punch, and the occurrence of galling is small, which is more effective in eliminating dust powder. It is valid.

Since the airtight seal (5) is provided on the upper punch (3) above the dust reservoir (25) so as to be slidable with the outer periphery of the upper punch (3), dust powder is further removed from the dust reservoir (25) and the gap (29) between the punch and the holder. Does not go over the gap and enter the mold. For example, dust particles enter the sliding portions (31) of the guide hole (21) and the guide pin (2) and wear, or dust particles enter the guide hole (21). There is no clogging and a reduction in stroke.

Further, by providing an airtight seal (27) so as to cover the gap portion (30) between the lower punch plate (12) and the lower holder (14) at the center of the waste reservoir (26) of the lower punch (13), The powder has passed over the gap (30) between the punch and the holder,
As it does not enter the mold, the sliding part (3) of the guide hole (22) and lower guide pin (10) is the same as the upper mold.
2) dust particles get in and wear, or the guide hole (22)
The dust will not be clogged in and the stroke will not be reduced.

In addition, the holes (9, 9) are designed so that the airtight seal (27) can discharge the dust powder when it enters the mold due to the dust, bite, wear or damage of dust powder at the seal. It is connected to the exit (28, 28). Further, in addition to the configuration of the present invention, the waste discharge portion (8, 8) or the lower discharge port (2
It is needless to say that if dust powder is sucked at the same time as air is blown by a suction device (not shown) in (8, 28), the dust powder is more easily discharged from the dust reservoir.

(Effect of the Invention) As described above, according to the present invention, since the scrap reservoir surrounding each punch is provided adjacent to the punch fitting holes of the upper and lower holders, the gradually increasing diameter portion, the air blowing hole, the discharge hole, and the airtight seal, The dust powder is easily discharged from the punch and the hole, and there is no galling, and since the dust powder does not enter the mold from the dust reservoir, dust powder enters the sliding parts and the gap between the punch and the holder. No longer causes wear or reduced stroke. That is, in the past, when the workpiece was punched continuously, it was necessary to disassemble and clean the die at the time of punching 2000 to 3000 shots, but with the die of the present invention, it is possible to punch more than 100,000 shots continuously. became.

[Brief description of drawings]

The drawing shows a cross-sectional view of a main part of a mold for an exciter according to an embodiment. 3 …… Upper punch, 5,27 …… Airtight seal, 6 …… Upper holder, 8 …… Scrap discharge hole, 13 …… Lower punch, 14 …… Lower holder, 16 …… Workpiece, 17 …… Air Outlet, 18,19 ...
… Gradually increasing diameter part, 20… Complementary shape hole (punch fitting hole), 24…
… Main body, 25,26 …… Scraps, 28 …… Discharge port, 29,30 …… Gap

Claims (2)

[Scope of utility model registration request] 1. A pair of upper and lower punches each having a tip shape matching the shape of a hole to be machined, and a pair of upper and lower holders each having a hole having a complementary shape with respect to the tip of the punch. One of the pairs of punches or holders of each pair is arranged so as to clamp and fix the workpiece to the main body, and the other pair is vibrating / pulling that is fixed to the main body and is capable of vibrating and punching feed. In a vibrating machine mold comprising the punch and a holder connected to an apparatus, a scrap reservoir formed in the upper holder above the holes of the upper holder and surrounding each of the upper punches, and the scrap from the holes. A gradually increasing diameter portion gradually increasing in diameter toward the reservoir, an air outlet hole provided in the upper portion of the dregs reservoir of the upper holder,
An additional feature is that it has a waste discharge hole that opens to the lower portion of the waste reservoir and communicates with the outside of the holder, and has an airtight seal that is interposed between the upper holder and the upper punch at the upper portion of the waste reservoir. Mold for shaker. 2. The vibrator die according to claim 1, wherein:
The lower holder is provided with a dregs reservoir formed in a lower portion of the hole of the lower holder and surrounding each of the lower punches, and a gradually increasing diameter portion that gradually increases in diameter from the hole toward the dregs reservoir. The bottom of the reservoir has an inclined surface, has a discharge port downward, and has an airtight seal interposed in a gap between the lower punch plate forming the lower portion of the waste reservoir and the lower holder. Mold for shaker.