JPS5758927A - Precision blanking die - Google Patents
Precision blanking dieInfo
- Publication number
- JPS5758927A JPS5758927A JP13395780A JP13395780A JPS5758927A JP S5758927 A JPS5758927 A JP S5758927A JP 13395780 A JP13395780 A JP 13395780A JP 13395780 A JP13395780 A JP 13395780A JP S5758927 A JPS5758927 A JP S5758927A
- Authority
- JP
- Japan
- Prior art keywords
- plate
- die
- projected line
- blank holder
- punch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Punching Or Piercing (AREA)
Abstract
PURPOSE: To obtain an elliptical blank which is nearly a circular form with a circular punch or die which are easy to manufacture by modifying an annular projected line provided on a blank holder or die in a fine blanking type precision blanking die.
CONSTITUTION: An annular projected line 7 is so structured that the gap between it and the periphery of a hole 5 of a blank holder 4 through which a punch 1 passes varies selectively along the circumferential dirrction. When a blank holder 4 is lowered, the projected line 7 presses a plate W to the upper surface of a die 2, and cuts into the plate to restrain the plate strongly around the die hole 3. Material flow equivalent to the volume which the projected line 7 cuts into the plate is formed in the plate by this cutting-in. At this time, material flow also occurs inward from the part restrained by the projected line 7, and consequently, the plate W bends inside of the restrained part, and this bending forms a part of an ellipsoid of revolution. After above-mentioned cutting in is made completely, and the bottom face of the blank holder 4 comes into contact with the upper face of the plate, the punch 1 goes down and blanking of the plate is made jointly with the hole 3.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13395780A JPS5758927A (en) | 1980-09-25 | 1980-09-25 | Precision blanking die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13395780A JPS5758927A (en) | 1980-09-25 | 1980-09-25 | Precision blanking die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5758927A true JPS5758927A (en) | 1982-04-09 |
Family
ID=15117025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13395780A Pending JPS5758927A (en) | 1980-09-25 | 1980-09-25 | Precision blanking die |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5758927A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4611483A (en) * | 1983-06-28 | 1986-09-16 | Repco Limited | Press and method of making same |
| US5052207A (en) * | 1989-07-26 | 1991-10-01 | Cmb Foodcan Plc | Apparatus for, and a method of, cutting a blank |
| US5802907A (en) * | 1993-03-12 | 1998-09-08 | Stodd; Ralph P. | Tooling apparatus and method for high speed production of drawn metal cup-like articles |
| CN104607528A (en) * | 2013-11-05 | 2015-05-13 | 王正平 | Groove type precision blanking device |
| CN105880350A (en) * | 2016-04-01 | 2016-08-24 | 武汉理工大学 | Discontinuous point type blank holder for fine blanking die and design method of technological parameters of discontinuous point type blank holder |
-
1980
- 1980-09-25 JP JP13395780A patent/JPS5758927A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4611483A (en) * | 1983-06-28 | 1986-09-16 | Repco Limited | Press and method of making same |
| US5052207A (en) * | 1989-07-26 | 1991-10-01 | Cmb Foodcan Plc | Apparatus for, and a method of, cutting a blank |
| US5802907A (en) * | 1993-03-12 | 1998-09-08 | Stodd; Ralph P. | Tooling apparatus and method for high speed production of drawn metal cup-like articles |
| CN104607528A (en) * | 2013-11-05 | 2015-05-13 | 王正平 | Groove type precision blanking device |
| CN105880350A (en) * | 2016-04-01 | 2016-08-24 | 武汉理工大学 | Discontinuous point type blank holder for fine blanking die and design method of technological parameters of discontinuous point type blank holder |
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