KR20130063181A

KR20130063181A - Press mold to prevent the processing of scrap falling structure

Info

Publication number: KR20130063181A
Application number: KR1020110129564A
Authority: KR
Inventors: 곽성호
Original assignee: 주식회사 신흥정밀
Priority date: 2011-12-06
Filing date: 2011-12-06
Publication date: 2013-06-14

Abstract

PURPOSE: A processed scrap rise prevention structure of a press mold is provided to prevent rise of processed scrap by forcibly inserting the processed scrap, which is to be blanked, into a die land unit(a straight linear section in a blanking process) of a piercing hole of a mold die, thereby preventing a processed object and a mold from being damaged by the processed scrap during a piercing work. CONSTITUTION: A processed scrap rise prevention structure of a press mold comprises a die land unit(11) with a piercing hole(10) of a mold die(210), which is included in a lower part mold, into which a punch(110) of an upper mold is inserted; and a scrap discharge unit(15). A scrap discharge unit becomes wider toward the lower part to easily discharge scrap. A part of the die land unit is composed of a cutting unit(12) and a fitting unit(13). The cutting unit becomes narrower from the entry to the inside to gradually reduce a clearance(1/2 of the interval of the outer diameter of the punch and the inner diameter of the piercing hole) in order to be composed with a sectional reverse angle. The fitting unit maintains the minimum clearance. The processed scrap which is broken away from a processed object on the cutting unit is forcibly inserted into a fitting unit.

Description

Press mold to prevent the processing of scrap falling structure}

In the present invention, in forming a press mold, when a small piercing part of the product is punched out due to static electricity or adhesion, the scraped processing scrap (SCRAP) is attached to the bottom surface of the piercing punch (PIERCING-PUNCH) and the work is continuously performed. The die land of the piercing hole of the die die in which a piercing punch for piercing the product is inserted to prevent the work scrap from being damaged on the workpiece or inside the mold and damage to the mold. Regarding the structure to prevent the rising of the scrap scrap from the press mold, the part (straight section at the time of punching) is gradually reduced from the inlet to the inverted angle in the cross-section to prevent the pierced scrap from being caught by the force in the die land of the piercing hole. will be.

As the industry develops, the mold technology for processing these products is developed in the reality that chassis shapes of various shapes are mass-produced and used, and their use is also infinite.

As such, a piercing process for drilling a small hole for processing a tap hole in a workpiece is essential.

However, until now, when the small piercing part of the product is punched out, the pierced scrap (SCRAP) is stuck to the bottom of the piercing punch (PIERCING-PUNCH) due to static electricity or coalescence, etc. Scrap fell on the workpiece or inside the mold, damaging the product as well as the mold.

Therefore, in mold processing, it is the biggest problem to remove the scrap from the processing part at the same time as the processing work so as not to damage the next process. As a prior art, various technologies are developed and implemented as in the following patent document There is a situation.

Utility Model Registration Application No. 20-1990-0017627 (Nov. 16, 1990) relates to a simple press mold for piercing, which punches a product, and installs a punch together with urethane on the upper holder and support plate of the simple press mold. On one side of the upper holder, a guide post is installed and configured to elastically install the guide post up and down with compression springs and lock nuts in the guide grooves formed in the lower die and the lower holder having the piercing holes. Patent application No. 10-2005-0028636 (2005,04.06) is a press gear which is driven by a pinion gear with a pair of rack gears that vertically move the press mold and a freewheel that engages with it and transmits power in only one direction. A device for forcibly discharging scrap generated during operation The scrap forced discharging device structure of a press mold is installed in parallel to the lower part of the press upper mold moving up and down during press operation, and the gear face is provided to face in the opposite direction. First and second rack gears, the first of which is provided via a freewheel and configured to engage the first and second rack gears respectively so as to transmit power only when rotated in one direction at the end of the drive shaft installed on the press lower die. And a second pinion gear, the drive shaft, and an upper and lower teeth of the press upper mold wound around the idle shaft installed at a predetermined distance therefrom. At the same time, it is made of a scrap discharge belt that rotates in only one direction and receives the scrap generated during the press work and discharges it to the outside. Patent application No. 10-1997-0054704 (October 24, 1997) relates to a scrap guide device of a press mold, and has a roller stand provided with a plurality of rollers to convey the scrap cut from the press mold, In the scrap guide device of the press mold consisting of the inner guide positioned on the inner side and the outer guide exposed to the outside of the mold body, the guide rods are installed side by side in the longitudinal direction to the support frame for supporting the roller stem on both sides of the inner guide. The slide guides sliding in the guide rods are respectively installed inwardly on one side of the outer guide, and the other side of the outer guide is provided with a locking pin via a wire, and the locking pin is provided on the outer guide. It is fitted into a fixing hole formed in one side of the support frame. Patent application No. 10-2000-0083923 (2000.12.28) can improve the utilization rate of the press line by faster scrap discharge during press production work, and can simplify the configuration by removing the air cylinder used in the prior art A scrap discharge apparatus of a press mold capable of reducing noise, the apparatus for discharging scrap generated in a process of trimming a panel which is a molding object of a press mold to the outside, comprising: a housing of the press mold; A chute mounted in the housing and mounted with a predetermined slope to the scrap discharge inlet and the scrap discharge outlet formed in the housing; An auxiliary frame mounted in a horizontal direction under a space in which the chute is mounted; An air discharge part fixedly coupled to the auxiliary frame at a predetermined distance on the lower side of the chute to inject air supplied in the chute downward direction; A buffer unit mounted between a lower portion of the chute and the auxiliary frame to control the chute movement and to absorb shocks caused by the chute movement; And an air supply actuator which is driven in accordance with a predetermined drive control signal and supplies compressed air to the air discharge unit. Patent application No. 10-1997-0054697 (October 24, 1997) relates to a scrap discharging apparatus of a press die, and the punching machine of the upper die die punches the panel placed on the lower die, and the scrap generated by the drilling operation In the scrap mold discharge apparatus of the press mold discharged to the air, the air passage through which the air passes so that the air pressure is applied to the inside of the punching machine is formed, the air flow passage is provided with an ejector moving in the The lower end is installed so as to protrude to the outside of the punch machine, the upper end is supported by being connected to one end of the spring, the other end of the spring is connected to the fixing ring installed in the air flow path, When air pressure is applied to the ejector, the ejector moves vertically downward to scoop out the scrap stacked on the scrap outlet of the die and discharge it to the outside. By yirueojim so, one would allow the scrap generated during the drilling of the panel can be smoothly discharged to the outside.

Until now, in constructing a press mold, a technology in which a pierced scrap falls from a piercing hole when it falls down is discharged or pushed out once more. This is due to piercing due to static electricity or adhesion when a small piercing part of the product is punched out. In the situation where the processed scrap (SCRAP) is attached to the bottom of the piercing punch (PIERCING-PUNCH) and the work is continuously performed, the scrap falls on the workpiece or inside the mold and damages the product as well as the mold. This was a lot.

Accordingly, the present invention prevents the punched work scraps from being forced by the die land portion of the piercing hole of the mold die into which the piercing punch for piercing the product is inserted (straight line at the time of punching) so that the workpiece and the mold due to the work scraps during piercing work are not raised. The purpose is to prevent damage.

The present invention for achieving the above object, in the configuration of the press mold for processing the hole in the workpiece while the punch consisting of the upper mold and the lower mold enters into the piercing hole formed in the mold die of the lower mold,

The piercing hole of the mold die constituting the lower mold into which the upper mold piercing punch is inserted is widened toward the lower portion of the die land (straight section for cutting the processing material at the time of punching) and the lower side so that the scrap easily flows out. And a portion of the die land portion is gradually reduced from the inlet to the inner side so as to form a reverse angle θ in cross section so that the clearance L1 (half-gap between the outer diameter of the punch and the inner diameter of the piercing hole of the die) becomes smaller. The cutting part and the clamping part which hold the minimum clearance L2 are comprised so that the processing scrap removed from the workpiece at the cutting part may be forcibly fitted in the clamping part.

At this time, the piercing hole of the mold die constituting the lower mold is made of at least 3 mm or more of the die land portion from the material of which the workpiece is at least 0.5T, and the piercing is made with 0.03 mm of the normality L1 of the cutting blade portion of the inlet of the piercing hole. The cutting part is formed to become narrower gradually so that the clearance L2 may become 0.01 mm from the cutting blade part of a hole entrance to 0.01 mm, and the formation part which consists of a straight section which makes a clearance of 0.01 mm is formed next.

According to the present invention configured as described above, the scrap scraped from the workpiece during the piercing processing is caught by the piercing hole of the piercing hole so as not to rise to the bottom of the punch, thereby preventing damage to the workpiece or the processing mold due to the scrap during machining. It can be seen that the invention is an advanced invention that creates a new effect not found in the cushion protection block so far.

1 is a view illustrating a configuration state of a general press embodying the present invention.
Figure 2 is an exemplary longitudinal cross-sectional view showing the main portion of the configuration of the present invention.
Figure 3 is an enlarged cross-sectional view illustrating a specific configuration of the main portion of the present invention.

Referring to the configuration of the present invention described above with reference to the accompanying drawings,

As illustrated in FIG. 1, a punch 110 having an upper mold 100 and a lower mold 200 and having a punch 110 formed in the upper mold 100 is formed in the mold die 210 of the lower mold 200. In constructing all the press molds for processing holes in the workpiece 300 while entering),

As shown in Figs. 2 to 3, the piercing hole 10 of the mold die 210 constituting the lower mold 200 into which the punch 110 of the upper mold 100 is inserted is formed. Straight section for cutting the workpiece material) and the scrap discharge portion 15 widened downward to the bottom side so that the scrap easily flows out, and a part of the die land portion 11 is moved from the entrance to the inside. The cutting portion 12 is formed by gradually reducing the crunch (the gap between the punch outer diameter and the inner diameter of the die's piercing hole) so as to form an inverted angle in cross section, and the clamping portion 13 which maintains the minimum amount of clearance. In (12), it is configured such that the processed scrap separated from the workpiece 300 is forcibly fitted into the fitting portion 13.

At this time, the piercing hole 10 of the die die 210 constituting the lower mold 200, the workpiece 300 comprises at least 3mm or more of the die land portion 11 in a material of at least 0.5T, piercing hole (10) The cutout portion 12 is formed so that the clearance of the cutting edge portion of the inlet is normally 0.03 mm and gradually narrows so that the clearance is 0.01 mm from the cutting edge portion of the piercing hole 10 to the depth of 2 mm. Next, it is most ideal to form the constriction portion 13, which is a straight section, having a clearance of 0.01 mm.

Referring to the embodiment of the present invention configured in this way in more detail,

First, in carrying out the present invention, it is applicable only when the thickness of the workpiece is 0.5 mm (0.5 t) or more.

The reason for this is that as shown in Fig. 3, the piercing clearance of the workpiece having a thickness of 0.5 mm should be 0.03 mm.

On the basis of the above conditions, the processing of the piercing hole 10 of the die die 210 included in the lower mold 200 is performed. Since it is necessary to ensure the state that the processing burr (BURR) does not occur in the piercing hole of the workpiece 300 during the piercing processing by providing the amount of pierce, the punch 110 of the upper mold 100 is the lower mold 200 The cutting part 12 passes through the upper edge of the piercing hole 10 of the die die 210 constituting the mold to gradually pass through the upper edge of the piercing hole 10 to a portion of 0.02 mm smaller than the edge of the blade. And processing the clamping portion 13 by extending the process of 0.01 mm below the clamping portion 13 to form a chip, which is a machining scrap, in the machining portion 10 of the land portion 11 formed in the processing hole 10 of the mold die 210. 12) Forced indentation.

At this time, the workpiece having a thickness of 0.5 mm or less is too small to have 0.02 mm or less so that the punch 110 collides with the mold die 210 when the punch 110 passes through the cut portion, and thus is not applicable.

At this time, the most important thing is to secure the forced indentation section by setting the cutting part 12 of the piercing hole 10 of the die die 210 to 3 to 4 mm and the cutting part 12 to decrease the climax to 2 mm.

The present invention described above is quite convenient and practical in forming a piercing die in an industrial site equipped with a die processing facility, such that the scrap scraped from the workpiece rises again to prevent the risk of accidents that damage the workpiece or the mold. It is possible to use it, so the industrial use value is high.

10: piercing hole 11: die land portion 12: cutting portion
13: clip 15: scrap ejection part
100: upper mold 110: punch (PUNCH) 200: lower mold
210: die die 300: workpiece

Claims

The punch 110 formed of the upper mold 100 and the lower mold 200 and entering the piercing hole 10 formed in the mold die 210 of the lower mold 200 enters the workpiece 300. In constructing a press mold for processing holes in
The piercing hole 10 of the die die 210 constituting the lower mold 200 into which the punch 110 of the upper mold 100 is inserted is a die land portion 11 (a straight line for cutting a workpiece when punched). Section) and the scrap discharge portion 15 widened downward toward the bottom side so that the scrap easily flows out, and the portion of the land portion 11 is gradually reduced inward from the entrance to form an inverse angle in cross section. The workpiece 300 may be formed at the cut portion 12 by forming a cut portion 12 in which an ances (an interval between the punch outer diameter and the inner diameter of the piercing hole of the die) becomes smaller and a pinch portion 13 that maintains the minimum amount of clearance. Process scrap rise prevention structure of the press mold, characterized in that configured to be forcibly fitted into the clamping portion 13, the scrap scraped from.

The method of claim 1,
The piercing hole 10 of the die die 210 constituting the lower mold 200 is formed of at least 3 mm or more of the die land portion 11 in a material having a workpiece 300 of at least 0.5T or more. 10) The cutting part 12 is formed so that the clearance of the cutting blade portion of the inlet is normally 0.03 mm, and gradually narrowed so that the clearance is 0.01 mm from the cutting blade portion of the inlet of the piercing hole 10 to a depth of 2 mm. The construction of the press die of the press mold, characterized in that formed by forming the clamping portion 13 which is a straight section with a clearance of 0.01mm from.