JPS5758928A - Precision blanking die - Google Patents
Precision blanking dieInfo
- Publication number
- JPS5758928A JPS5758928A JP13395880A JP13395880A JPS5758928A JP S5758928 A JPS5758928 A JP S5758928A JP 13395880 A JP13395880 A JP 13395880A JP 13395880 A JP13395880 A JP 13395880A JP S5758928 A JPS5758928 A JP S5758928A
- Authority
- JP
- Japan
- Prior art keywords
- plate
- die
- projected line
- material flow
- hole
- 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
- 238000005452 bending Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
Landscapes
- Punching Or Piercing (AREA)
Abstract
PURPOSE: To obtain an elliptical blank which is nearly a circular form with a circular punch or die that 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 the height is selectively changeable along its circumferential direction. 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 that 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 in the inside of the restrained part. The quantity of material flow differs along the circumferential direction of the hole 3, and the bending forms a part of an ellipsoid of revolution. After aobve-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 W is effected jointly with the hole 3.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13395880A JPS5758928A (en) | 1980-09-25 | 1980-09-25 | Precision blanking die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13395880A JPS5758928A (en) | 1980-09-25 | 1980-09-25 | Precision blanking die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5758928A true JPS5758928A (en) | 1982-04-09 |
Family
ID=15117049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13395880A Pending JPS5758928A (en) | 1980-09-25 | 1980-09-25 | Precision blanking die |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5758928A (en) |
-
1980
- 1980-09-25 JP JP13395880A patent/JPS5758928A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5758927A (en) | Precision blanking die | |
| JPS5758928A (en) | Precision blanking die | |
| JPS5311387A (en) | Process for blanking products with a given shape from sheet-shaped material | |
| JPS56102323A (en) | Formation of end plate | |
| JPS5699040A (en) | Die for manufacturing flanged hollow product | |
| JPS5785623A (en) | Blanking die for plate | |
| JPS53110468A (en) | Metal mould for semiconductor device | |
| JPS5341879A (en) | Method of preventing scum from rising in press work | |
| JPS5744424A (en) | Manufacture and apparatus of semisphere cap | |
| JPS551941A (en) | Preventing method for slug rising of thin plate steel plates | |
| JPS5283293A (en) | Paper tape puncher | |
| JPS5758936A (en) | Manufacture of seamless eccentric reducer tube joint | |
| JPS5695438A (en) | Hump forming method of outer rim of wheel for automobile | |
| JPS5224579A (en) | Method of detecting louver fabricating limits | |
| JPS51120355A (en) | Process for making diaphragm by photoetching | |
| JPS57146428A (en) | Piercing method for plate | |
| JPS56126542A (en) | Press fitting method of member | |
| JPS57167228A (en) | Manufacture of cover of cup-shaped container | |
| JPS5351555A (en) | The manufacture of wave-form fins | |
| JPS57100835A (en) | Manufacture washer | |
| JPS5290404A (en) | Dies for powder forming | |
| JPS5310180A (en) | Process and apparatus for producing corrugated cardboard trimming material | |
| JPS5653826A (en) | Device for burring of metal plate | |
| JPS5728623A (en) | Method for forming elbow with straight pipe in one body | |
| JPS5244476A (en) | Paper stapler |