JPS6416399A - Method of forming punched hole - Google Patents
Method of forming punched holeInfo
- Publication number
- JPS6416399A JPS6416399A JP17166487A JP17166487A JPS6416399A JP S6416399 A JPS6416399 A JP S6416399A JP 17166487 A JP17166487 A JP 17166487A JP 17166487 A JP17166487 A JP 17166487A JP S6416399 A JPS6416399 A JP S6416399A
- Authority
- JP
- Japan
- Prior art keywords
- cutting edge
- workpiece
- entry
- parts
- edge
- 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.)
- Granted
Links
Landscapes
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
PURPOSE: To form a punched hole in a workpiece of high ductility in one stroke so as to have a fine cut face by providing a cutting edge of a punch with an acute-angled edge part continuously formed at an outer peripheral edge part, and inclined cutting edge parts formed in at least two substantially opposed places so as to intersect at a tilt angle to the workpiece. CONSTITUTION: When a cutting edge 6 of a punch 5 enters a workpiece 1, the cutting edge 6 enters the workpiece 1 through inclined cutting edge parts 5e while successively moving an entry position into the workpiece 1 so as to be able to smoothly enter the workpiece 1. Since the cutting edge 6 has an acute-angled edge part 5d, the workpiece 1 is successively cut by the cutting edge 6. In the entered cutting edge 6, the tilt angle of the inclined cutting edge parts 5e acts as a clearance angle upon the workpiece 1. In association with the entry of the cutting edge 6, the workpiece 1 is cut by the edge part 5d without being distorted in a large degree. When the cutting edge 6 thrusts through the workpiece 1, the cutting edge 6 smoothly thrusts through the workpiece 1 through the inclined cutting edge parts 5e in the same way as the time of entry, without forming a burr.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62171664A JPH069798B2 (en) | 1987-07-09 | 1987-07-09 | Method of forming punched holes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62171664A JPH069798B2 (en) | 1987-07-09 | 1987-07-09 | Method of forming punched holes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6416399A true JPS6416399A (en) | 1989-01-19 |
| JPH069798B2 JPH069798B2 (en) | 1994-02-09 |
Family
ID=15927410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62171664A Expired - Lifetime JPH069798B2 (en) | 1987-07-09 | 1987-07-09 | Method of forming punched holes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH069798B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60186400A (en) * | 1984-03-05 | 1985-09-21 | 東洋製罐株式会社 | Puncher |
| JPS61201800U (en) * | 1985-06-08 | 1986-12-18 |
-
1987
- 1987-07-09 JP JP62171664A patent/JPH069798B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60186400A (en) * | 1984-03-05 | 1985-09-21 | 東洋製罐株式会社 | Puncher |
| JPS61201800U (en) * | 1985-06-08 | 1986-12-18 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH069798B2 (en) | 1994-02-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080209 Year of fee payment: 14 |