KR20130063181A - Press mold to prevent the processing of scrap falling structure - Google Patents
Press mold to prevent the processing of scrap falling structure Download PDFInfo
- Publication number
- KR20130063181A KR20130063181A KR1020110129564A KR20110129564A KR20130063181A KR 20130063181 A KR20130063181 A KR 20130063181A KR 1020110129564 A KR1020110129564 A KR 1020110129564A KR 20110129564 A KR20110129564 A KR 20110129564A KR 20130063181 A KR20130063181 A KR 20130063181A
- Authority
- KR
- South Korea
- Prior art keywords
- mold
- die
- scrap
- piercing
- punch
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
- B21D28/34—Perforating tools; Die holders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
- B21D45/02—Ejecting devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Punching Or Piercing (AREA)
Abstract
Description
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.
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
As shown in Figs. 2 to 3, the
At this time, the
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
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
At this time, the most important thing is to secure the forced indentation section by setting the
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 (2)
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 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.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020110129564A KR20130063181A (en) | 2011-12-06 | 2011-12-06 | Press mold to prevent the processing of scrap falling structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020110129564A KR20130063181A (en) | 2011-12-06 | 2011-12-06 | Press mold to prevent the processing of scrap falling structure |
Publications (1)
Publication Number | Publication Date |
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KR20130063181A true KR20130063181A (en) | 2013-06-14 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR1020110129564A KR20130063181A (en) | 2011-12-06 | 2011-12-06 | Press mold to prevent the processing of scrap falling structure |
Country Status (1)
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KR (1) | KR20130063181A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104399812A (en) * | 2014-11-14 | 2015-03-11 | 柳州市安龙机械设备有限公司 | Stamping die for connecting ear plate |
WO2018143524A1 (en) * | 2017-02-06 | 2018-08-09 | 주영하이텍 주식회사 | Die device for forming aluminum alloy cross member for vehicle |
CN110000278A (en) * | 2019-03-12 | 2019-07-12 | 江苏博俊工业科技股份有限公司 | Stamping die side punching waste material whereabouts control mechanism |
-
2011
- 2011-12-06 KR KR1020110129564A patent/KR20130063181A/en not_active Application Discontinuation
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104399812A (en) * | 2014-11-14 | 2015-03-11 | 柳州市安龙机械设备有限公司 | Stamping die for connecting ear plate |
WO2018143524A1 (en) * | 2017-02-06 | 2018-08-09 | 주영하이텍 주식회사 | Die device for forming aluminum alloy cross member for vehicle |
CN110000278A (en) * | 2019-03-12 | 2019-07-12 | 江苏博俊工业科技股份有限公司 | Stamping die side punching waste material whereabouts control mechanism |
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A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
E601 | Decision to refuse application |