GB857438A - An apparatus for forming in sheet material a substantially circular opening surrounded by a projecting flange - Google Patents
An apparatus for forming in sheet material a substantially circular opening surrounded by a projecting flangeInfo
- Publication number
- GB857438A GB857438A GB1245759A GB1245759A GB857438A GB 857438 A GB857438 A GB 857438A GB 1245759 A GB1245759 A GB 1245759A GB 1245759 A GB1245759 A GB 1245759A GB 857438 A GB857438 A GB 857438A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ring
- punch
- curling
- sleeve
- press
- 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.)
- Expired
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
- B21D21/00—Combined processes according to methods covered by groups B21D1/00 - B21D19/00
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Making Paper Articles (AREA)
Abstract
857,438. Stamping. METAL CONTAINERS Ltd. April 13, 1959, No. 12457/59. Class 83(4). In an apparatus for forming in sheet material 41 an opening surrounded by a flange 43 having a curled bead 47 at its edge, Fig. 2, comprising punch-and-die units for successively cutting the opening, forming the flange and curling the edge, one of the units including a sleeve 12 and a supporting ring 14 surrounding the sleeve and slidable against the pressure of springs 17, and the other unit including a punch 21 co-operating with a cutting edge 13 on the sleeve 12 for forming the opening, a press-ring 23 surrounding the punch and movable axially against the pressure of springs 30, and a curling ring 35 between the punch and ring 23 and having a curling groove 38, a pre-curling ring 39, for engaging the work prior to the curling ring 35 to form an outwardly flared edge on the flange, is located within the curling ring and slidable axially against the pressure of springs 40. In Fig. 1, the punch 21 is in its raised position and the press-ring 23 held against the pressure of springs 30 by bolts 32, Fig. 2, supporting flanged guide-sleeves 33 in pockets in a support ring 24 on which the divided press-ring is mounted by bolts 26 engaging a retaining ring 25 in a groove in the press-ring. Sleeves 27 on the bolts are in radial slots 28 in the sections of the pressring 23, permitting radial movement of the sections when they are forced against the conical seating of a ring 29 which is biased outwardly of the punch-carrier 20 by springs 34. Springs 31 are located between the sections of the pressring 23. Operation.-After the punch has formed the opening, the press-ring engages the worksupporting ring 14 and the sections are closed by continued movement of ring 29 until the supporting ring 24 contacts the base 8 of its housing in ring 29. The press-ring, supporting ring 14 and the work then move down with ring 29 to commence the flanging operation, Fig. 5, the flange being formed by an inner lip on the press-ring and the end of sleeve 12. Precurling ring 39 then engages the flange to flare its edge (Fig. 6, not shown) and is held against further downward movement by contact with sleeve 12, while the work continues to descend past a shoulder 46 on the sleeve which turns the flange 43 into an upright position, Fig. 8. Downward movement of the support ring on guides 15, 16 stops when it engages the base 11 and the work contacts a shoulder on sleeve 12. Further descent of the carrier 20, to complete the curling operation by means of the curling ring 35, causes the carrier ring 29 to move further into the punch-carrier 20.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1245759A GB857438A (en) | 1959-04-13 | 1959-04-13 | An apparatus for forming in sheet material a substantially circular opening surrounded by a projecting flange |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1245759A GB857438A (en) | 1959-04-13 | 1959-04-13 | An apparatus for forming in sheet material a substantially circular opening surrounded by a projecting flange |
Publications (1)
Publication Number | Publication Date |
---|---|
GB857438A true GB857438A (en) | 1960-12-29 |
Family
ID=10004964
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1245759A Expired GB857438A (en) | 1959-04-13 | 1959-04-13 | An apparatus for forming in sheet material a substantially circular opening surrounded by a projecting flange |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB857438A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107876631A (en) * | 2017-12-28 | 2018-04-06 | 东莞市长东模具有限公司 | A kind of collection cut-out, shaping and volume circle are machined in integral die device |
-
1959
- 1959-04-13 GB GB1245759A patent/GB857438A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107876631A (en) * | 2017-12-28 | 2018-04-06 | 东莞市长东模具有限公司 | A kind of collection cut-out, shaping and volume circle are machined in integral die device |
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