JPS57134220A - Method and apparatus for trimming - Google Patents
Method and apparatus for trimmingInfo
- Publication number
- JPS57134220A JPS57134220A JP1966681A JP1966681A JPS57134220A JP S57134220 A JPS57134220 A JP S57134220A JP 1966681 A JP1966681 A JP 1966681A JP 1966681 A JP1966681 A JP 1966681A JP S57134220 A JPS57134220 A JP S57134220A
- Authority
- JP
- Japan
- Prior art keywords
- work
- cutting edge
- face
- holding member
- cut
- 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
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
- B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shearing Machines (AREA)
- Punching Or Piercing (AREA)
Abstract
PURPOSE:To prevent burr of cut end face, wear of upper cutting edge and to improve productivity by holding a work with a holding member elastically supported to a trim lower die and a holding member fixed to an upper die, and thereby giving tension to the cut part. CONSTITUTION:When a ram 1 goes down, a pad 2 comes into elastic contact with a work 4 on a punch 3 to press it. At the same time, the blank part 4a of the work 4 is held and fixed by an upper holding member 13 and a lower holding member 14. When the ram 1 goes down further, an elastic body 15 is deformed by compression and stretches the material to some extent giving tension to the cut part of the work 4. Then, stretched material is cut by an upper cutting edge 5a of a die 5 and a lower cutting edge 3a of the punch 3 to trim the work 4. At this time, tension of the edge of the work 4 is released and the material is restored. The cut end face is drawn to the punch 3 side to some degree and a clearance delta is formed between the cut end face and upper cutting edge. Consequently, friction between the cut end face and upper cutting edge 5a at the time of ascent of the ram 1 can be prevented.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1966681A JPS57134220A (en) | 1981-02-13 | 1981-02-13 | Method and apparatus for trimming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1966681A JPS57134220A (en) | 1981-02-13 | 1981-02-13 | Method and apparatus for trimming |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57134220A true JPS57134220A (en) | 1982-08-19 |
Family
ID=12005557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1966681A Pending JPS57134220A (en) | 1981-02-13 | 1981-02-13 | Method and apparatus for trimming |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57134220A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59124625U (en) * | 1983-02-14 | 1984-08-22 | トヨタ自動車株式会社 | Cutting die structure of press equipment |
| FR2690097A1 (en) * | 1992-04-17 | 1993-10-22 | Lorraine Laminage | Cutting procedure for cutting workpiece from sheet metal - uses die or matrix with projection which stretches sheet metal prior to cutting thus reducing cutting effort needed |
| JP2015174133A (en) * | 2014-03-18 | 2015-10-05 | Ｊｆｅスチール株式会社 | Method for predicting damage risk portion of cutting die and method for preventing damage of cutting die using the same |
-
1981
- 1981-02-13 JP JP1966681A patent/JPS57134220A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59124625U (en) * | 1983-02-14 | 1984-08-22 | トヨタ自動車株式会社 | Cutting die structure of press equipment |
| FR2690097A1 (en) * | 1992-04-17 | 1993-10-22 | Lorraine Laminage | Cutting procedure for cutting workpiece from sheet metal - uses die or matrix with projection which stretches sheet metal prior to cutting thus reducing cutting effort needed |
| JP2015174133A (en) * | 2014-03-18 | 2015-10-05 | Ｊｆｅスチール株式会社 | Method for predicting damage risk portion of cutting die and method for preventing damage of cutting die using the same |
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