KR20140114591A - Press die - Google Patents
Press die Download PDFInfo
- Publication number
- KR20140114591A KR20140114591A KR1020130029031A KR20130029031A KR20140114591A KR 20140114591 A KR20140114591 A KR 20140114591A KR 1020130029031 A KR1020130029031 A KR 1020130029031A KR 20130029031 A KR20130029031 A KR 20130029031A KR 20140114591 A KR20140114591 A KR 20140114591A
- Authority
- KR
- South Korea
- Prior art keywords
- die
- punch
- scrap
- workpiece
- rising
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/02—Perforating by punching, e.g. with relatively-reciprocating punch and bed
- B26F1/14—Punching tools; Punching dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Punching Or Piercing (AREA)
Abstract
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press die, and more particularly, to a press die having at least one of a die and a punch having a scrap rising prevention portion for preventing scrap from rising together with the punch.
In general, the operation of the press mold is made up of the following three steps.
A plastic deformation step in which plastic deformation is initiated beyond the elastic limit of the workpiece as the punch touches the workpiece, and a shearing step in which the punch enters the workpiece and shear after pressing due to bending occurs. Finally, as the shear deformation progresses, there is a cutting step in which the stress concentration of the punch and the die end causes the material to be cut and the material is divided.
At the end of the cutting step, the punch rises with the rise of the press, where the scrap must fall down but may rise with the punch.
If the scrap rises, the automatic machining will not be smooth, resulting in a delay in the working time and causing defects. As a cause of the rise of scrap, there is typically an increase in adhesion between punch and scrap due to compressed air, and a suction action. Several methods have been used to prevent such scrap rise. Separate compulsory devices or processing methods affecting the shape of the product require a reduction in dimensional accuracy and a separate connection device. Further, there is a need to connect and disassemble each time the mold is exchanged.
Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a press mold which can prevent the scrap from rising by modifying the structure of at least one of dies and punches.
The press die of the present invention includes a die on which a workpiece is placed and a punch for cutting the workpiece, and a scrape-up prevention portion for preventing scrap from rising together with the punch is provided on at least one of the die and the punch .
The punch may have at least one protrusion on the bottom surface for deformation of the scrap.
The punch may have at least one groove on the bottom surface for reducing the contact area with the scrap.
The die may have at least one groove for discharging compressed air to the denting side.
The die may be characterized by having multiple clearances for discharging compressed air to the denting side.
The multiple clearances may have different clearances in the first and third quadrants and the second and fourth quadrants of the cross section perpendicular to the longitudinal direction of the die.
The die may have a multi-stage inclination for inducing a scraping phenomenon on the scraper side.
The die may be characterized by having multiple clearances and multi-step inclination on the denting side.
The multi-stage inclination may be characterized by having a two-step inclined clearance divided into a single-stage scraper portion to which the workpiece is cut and a two-stage scraper portion to sandwich the scrap.
Application of the shape proposed by the present invention can prevent scrap rise after shearing the product, thereby reducing defects during production and loss due to stopping time during operation.
Further, since there is no need for a separate additional device, it is possible to apply the present invention regardless of the size and shape of various sheaves without inconveniencing the connection and disassembly when changing the mold.
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing an operating state of a press die according to an embodiment of the present invention. Fig.
Fig. 2 is a view showing a punch having the projection shown in Fig. 1; Fig.
3 illustrates a punch having a groove according to one embodiment of the present invention.
Figure 4 illustrates a die having grooves according to one embodiment of the present invention.
Figure 5 illustrates a die having multiple clearances in accordance with one embodiment of the present invention.
Figure 6 illustrates a die having a multi-tapered incline according to one embodiment of the present invention.
Figure 7 illustrates a die having multiple clearances and multi-step slopes in accordance with one embodiment of the present invention.
Hereinafter, embodiments according to the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a view showing an operating state of a press die according to an embodiment of the present invention, and FIG. 2 is a view showing a punch having the protrusion shown in FIG.
The press mold 1 is a device for producing a product by molding a material by placing a tool on a press machine that reciprocates linearly. The press die 1 is constituted by a press for applying pressure to a material by up and down movement in the axial direction, a
The
The scrap is a workpiece cut by the
However, there are cases where the scrap is lifted together with the
In order to prevent such a scrap rise, the present invention uses a
The
When cutting the workpiece with the punch shown in Fig. 2, before the workpiece is cut, the
Unlike general scrap, scrap after shearing forms
3 is a view showing a
The
When cutting the workpiece with the
4 is a diagram illustrating a
The
When the workpiece is cut using the
Figure 5 is a diagram illustrating a die 10c having multiple clearances in accordance with one embodiment of the present invention.
The clearance is a linear minimum distance between the cut surface of the punch and the
The cross section perpendicular to the longitudinal direction of the
When the workpiece is cut using the
6 is a diagram showing a
In the case of a general die, the portion to be cut by the punch is narrow, and the portion where the scrap falls on the inner side of the die is made wider so that the scrap is piled up at the die inner bottom portion. The present invention has a two-step inclination that narrows the two-end short-
When the workpiece is cut using the
At this time, the feeding amount of the punch (the degree to which the punch is lowered to the die) is applied to not less than the two short-
7 is a diagram showing a
5 and FIG. 6, it is possible to reduce the attraction force between the punch and the scrap by allowing the compressed air to escape through the escaping
In the above description, the specific shape has been mainly described in the description of the press die with reference to the accompanying drawings. The detailed dimensions, protrusions, grooves, clearances, the number and shape of the stages are differently applied depending on the shear size and shape, so long as those skilled in the art do not deform the product. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Further, although a press die for manufacturing a hole has been described as an example, this is merely an example, and a molded punch or die for preventing scrap rise according to the present invention may be used for other molding.
Accordingly, the true scope of protection of the present invention should be defined by the claims.
10: die 12: groove of die
20: punch 21: groove of punch
22: projection of punch 30:
42: bent scrap 100: inner die
110: dull side 111: escape surface
Claims (9)
At least one of the die and the punch,
And a scrap rising preventing portion for preventing the scrap from rising together with the punch.
Wherein the punch has at least one protrusion on a bottom surface for deformation of the scrap.
Wherein the punch has at least one groove on the bottom surface for reducing the contact area with the scrap.
Wherein the die has at least one groove for discharging compressed air to the denting side.
Wherein the die has multiple clearances for discharging compressed air to the die side.
Wherein the multiple clearances have clearances different from each other in the first, third and fourth quadrants of the cross section perpendicular to the longitudinal direction of the die.
Wherein the die has a multistage inclination for inducing a scraping phenomenon of the scrap on the inner side of the die.
Wherein the die has multiple clearances and multi-step inclination on the denting side.
Wherein the multi-stage inclination has a two-stage inclined clearance divided into a single-stage scraper part in which the workpiece is cut and a two-stage scraper part in which the scrap is sandwiched.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020130029031A KR20140114591A (en) | 2013-03-19 | 2013-03-19 | Press die |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020130029031A KR20140114591A (en) | 2013-03-19 | 2013-03-19 | Press die |
Publications (1)
Publication Number | Publication Date |
---|---|
KR20140114591A true KR20140114591A (en) | 2014-09-29 |
Family
ID=51758238
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020130029031A KR20140114591A (en) | 2013-03-19 | 2013-03-19 | Press die |
Country Status (1)
Country | Link |
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KR (1) | KR20140114591A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105437606A (en) * | 2015-12-28 | 2016-03-30 | 天津萨图红芯科技有限公司 | Mold with protection device |
CN105881973A (en) * | 2016-05-19 | 2016-08-24 | 温州巨凯机械有限公司 | Perforating device of paper bag making machine |
CN106513494A (en) * | 2016-12-27 | 2017-03-22 | 安徽理士电源技术有限公司 | Storage battery net punching die facilitating material separating |
CN107081375A (en) * | 2017-05-08 | 2017-08-22 | 柯利佳 | Piercing punch structure |
WO2021210760A1 (en) * | 2020-04-17 | 2021-10-21 | 주식회사 동호에이텍 | Semiconductor lead frame punching mold enabling easy scrap disposal |
-
2013
- 2013-03-19 KR KR1020130029031A patent/KR20140114591A/en not_active Application Discontinuation
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105437606A (en) * | 2015-12-28 | 2016-03-30 | 天津萨图红芯科技有限公司 | Mold with protection device |
CN105881973A (en) * | 2016-05-19 | 2016-08-24 | 温州巨凯机械有限公司 | Perforating device of paper bag making machine |
CN106513494A (en) * | 2016-12-27 | 2017-03-22 | 安徽理士电源技术有限公司 | Storage battery net punching die facilitating material separating |
CN107081375A (en) * | 2017-05-08 | 2017-08-22 | 柯利佳 | Piercing punch structure |
WO2021210760A1 (en) * | 2020-04-17 | 2021-10-21 | 주식회사 동호에이텍 | Semiconductor lead frame punching mold enabling easy scrap disposal |
KR20210128612A (en) * | 2020-04-17 | 2021-10-27 | 주식회사 동호에이텍 | Mold for punching semiconductor leadframes for easy scrap removal |
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