EP0938939A2 - Verbesserte Bandzuführvorrichtung - Google Patents
Verbesserte Bandzuführvorrichtung Download PDFInfo
- Publication number
- EP0938939A2 EP0938939A2 EP99100700A EP99100700A EP0938939A2 EP 0938939 A2 EP0938939 A2 EP 0938939A2 EP 99100700 A EP99100700 A EP 99100700A EP 99100700 A EP99100700 A EP 99100700A EP 0938939 A2 EP0938939 A2 EP 0938939A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- feeder
- strip
- pair
- slides
- gripper
- 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
Images
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
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/02—Advancing work in relation to the stroke of the die or tool
- B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
- B21D43/10—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers
- B21D43/11—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers for feeding sheet or strip material
Definitions
- This invention relates to an improved metal strip feeder.
- Feeders are known for presses and machines in general which mechanically operate on a metal strip fed between the tools of said machines.
- EP-B1-0737115 describes a feeder provided with two pairs of grippers movable with reciprocating movement parallel to the longitudinal axis of the strip and operated synchronously such that when a gripper grips the strip it is driven in the direction required for strip advancement, whereas when that gripper is not activated it is driven in the opposite direction. It is clear that by suitably synchronizing the working movement with the advancing movement of the two grippers, correct unidirectional feed of the strip can be achieved towards the machine to be fed.
- a known type of such feeders uses grippers with pairs of jaws extending along the entire width of the feeder. They have proved particularly useful because of their adaptability to metal strip practically of any width, but at the same time they have shown to be limited in their use with small-width and small- thickness metal strip, especially if its position is displaced from the longitudinal axis of the feeder.
- the small clamping surface makes the grip uncertain and can result in uncertain locking, and hence undesirable movement of the strip relative to the gripper which clamps it, with obvious uncertainty of position of the strip relative to the machine to be fed, and possible inaccuracies in the resultant work.
- the longitudinal axis of the strip does not coincide with the longitudinal axis of the feeder, the strip will not be centered about the two jaws of each gripper, which can result in loss of parallelism between said jaws, with highlighting of this phenomenon.
- the feeder according to the invention comprises a bed indicated overall by 2, on which there are mounted two longitudinal rails 4,4' for guiding two slides 6,6' on which two carriages 8,8' are mounted.
- Each of the carriages 8,8' is provided with a threaded bush 10,10' in which there engages a longitudinal rod 12,12' provided along about one half of its length with a thread in one direction, and along the other half with a thread in the opposite direction.
- the threaded rod 12 is supported by the bed 2 via a pair of supports 14,14' applied to shoulders 15,15', the support 14 supporting its right end, whereas its left end extends beyond the shoulder 15' to be coupled to the output shaft of a direct current electric motor 16, also mounted on the bed 2.
- Each gripper 18,18' comprises a fixed lower jaw rigid with the corresponding carriage 8,8', and a movable upper jaw 20,20' driven relative to the corresponding fixed jaw by a pair of pneumatic actuators 22 of vertical axis.
- the movable jaw 20,20' of each gripper 18,18' comprises a plurality of aligned apertures housing corresponding grub screws 24, adjustable individually in their axial position relative to the seat housing them and consequently adjustable in the amount by which they project from the clamping surface of the jaw. This adjustment can be achieved for example by rotating the grub screw 24 and fixing it in the attained position by a locking nut 26.
- each screw 24 is pointed to facilitate, as described hereinafter, its penetration into the metal strip 28 to be fed a machine which is positioned downstream of the feeder according to the invention, and is not further described as it does not form part of this invention.
- Each centering section comprises a pair of transverse guides 32,32', ie positioned perpendicular to the guides 4,4'. They guide two slides 34,34' engaged on respective threaded rods 36,36', which are coupled to the corresponding threaded rods of the other centering section by sprocket wheels 38 connected together by pairs of chains 40,40' extending along the longitudinal edges of the bed 2 and covered together with the sprocket wheels 38 by a guard 42,42'.
- the threaded rods 36,36' relative to one of the two centering sections 30,30' extend beyond the respective sprocket wheel 38 and can be removably coupled to a handwheel 44,44' for manual operation.
- each slide 34 there is provided a longitudinal groove 44 facing the groove 44' of the facing slide 34' so as to cooperate with this in engaging the longitudinal edges of the strip and in guiding it in its advancement.
- a traditional straightening station for the strip 28 ie a station comprising a pair of lower transverse rollers 48 on which the strip 28 rests, and an upper transverse roller 50 which presses the strip against the lower rollers with adjustable intereference, to remove any curvature which the strip possesses if originating from the unwinding of a coil.
- a safety device consisting of a lower plate 52 on which the strip 28 slides, and an upper plate 54 which is hinged to the bed 2 along its rear transverse edge and can hence pass from a position parallel to the lower plate 52 to a raised position, shown by dashed in Figure 2.
- the feeder of the invention operates as follows:
- each of the two threaded rods 36,36' rigid with the handwheels 44,44' has associated with it a counter for counting the revolutions through which the rod has passed.
- the threaded rods 36,36' can also be associated with stepping motors instead of with handwheels, so as to be able to undergo motorized operation controlled by a computer.
- the grub screws 24 are adjusted. During this stage the grub screws of those jaw portions 20 directly involved in gripping the strip 28 are made to project to an extent sufficient to ensure that the points of the grub screws penetrate into the strip 28 sufficiently to securely clamp it. At the same time the grub screws of those jaw portions 20 not involved in gripping the strip are made to project to a greater extent to compensate for the strip thickness and to rest directly on the underlying jaw, to in all cases ensure perfect parallelism between the two jaws of each gripper independently of the position of the strip 28.
- the feeder is ready to operate by the synchronized powering of the actuators of the two grippers 18,18'and of the motor 16 which drives the threaded rod 12, in accordance with that described for example in the aforesaid EP-B1-0737115.
- the advancement of the strip 28 proceeds on the basis of the operating sequence of the machine positioned downstream of the feeder: the strip 28 is made to advance gradually as and when the machine requires it for working, in which case the upper plate 54 rests on the strip 28 parallel to the lower plate 52 and the sensor 56. It remains constantly activated by the activator 58 and provides the enabling signal for line operation.
- the downstream machine fails to operate correctly such as to cause a hold-up of the strip within said machine, the thrust which the strip undergoes by virtue of its advancement by the feeder causes it to arch in the only direction possible, ie upwards. This arching causes the plate 54 to rise, with disengagement between the activator 58 and the sensor 56.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Advancing Webs (AREA)
- Adhesive Tapes (AREA)
- Screw Conveyors (AREA)
- Coating Apparatus (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Organic Insulating Materials (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
- Manufacturing Of Electric Cables (AREA)
- Basic Packing Technique (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SI9930645T SI0938939T1 (en) | 1998-01-30 | 1999-01-15 | Improved metal strip feeder |
DK99100700T DK0938939T3 (da) | 1998-01-30 | 1999-01-15 | Forbedret metalbåndstilförselsindretning |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITVE980006 | 1998-01-30 | ||
IT1998VE000006A IT1306461B1 (it) | 1998-01-30 | 1998-01-30 | Alimentatore perfezionato di nastro di lamiera |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0938939A2 true EP0938939A2 (de) | 1999-09-01 |
EP0938939A3 EP0938939A3 (de) | 2001-01-24 |
EP0938939B1 EP0938939B1 (de) | 2004-07-14 |
Family
ID=11424335
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99100700A Expired - Lifetime EP0938939B1 (de) | 1998-01-30 | 1999-01-15 | Verbesserte Bandzuführvorrichtung |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0938939B1 (de) |
AT (1) | ATE270931T1 (de) |
DE (1) | DE69918581T2 (de) |
DK (1) | DK0938939T3 (de) |
ES (1) | ES2223148T3 (de) |
IT (1) | IT1306461B1 (de) |
PT (1) | PT938939E (de) |
SI (1) | SI0938939T1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002064281A1 (en) * | 2001-02-13 | 2002-08-22 | Dalcos S.R.L. | Gripper feeder for metal strip |
ITVI20110337A1 (it) * | 2011-12-27 | 2013-06-28 | Athena Spa | Apparato per la lavorazione in continuo di un materiale laminare avvolto in bobina e metodo di lavorazione in continuo di un materiale laminare avvolto in bobina |
CN103658432A (zh) * | 2012-09-19 | 2014-03-26 | 周德林 | 一种板材成型机的进料装置 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110817403B (zh) * | 2019-10-31 | 2022-02-15 | 山东科技大学 | 一种开式压力机连线式自动化上下料系统及其应用 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE461896C (de) * | 1928-06-29 | Groh C | Vorrichtung zum selbsttaetigen Stillsetzen von Maschinen, welche bandfoermiges Material in periodischem Vorschub verarbeiten | |
EP0015358A1 (de) * | 1979-03-07 | 1980-09-17 | VOEST-ALPINE Aktiengesellschaft | Einziehvorrichtung für eine Bandbearbeitungsanlage |
US4255999A (en) * | 1978-11-17 | 1981-03-17 | Pacific Roller Die Co., Inc. | Method and apparatus for removing camber from strip |
US4567799A (en) * | 1984-02-27 | 1986-02-04 | Braner Enterprises, Inc. | Shiftable pinch roll and strip-feed device for a slitter |
EP0284217A1 (de) * | 1987-02-27 | 1988-09-28 | BARNES, Austen Bernard | Funktionsstörungsdetektor |
EP0737115B1 (de) * | 1993-12-30 | 1997-10-01 | Dalcos S.R.L. | Zangen-vorschubgerät für metallstreifen |
-
1998
- 1998-01-30 IT IT1998VE000006A patent/IT1306461B1/it active
-
1999
- 1999-01-15 AT AT99100700T patent/ATE270931T1/de active
- 1999-01-15 DE DE69918581T patent/DE69918581T2/de not_active Expired - Lifetime
- 1999-01-15 ES ES99100700T patent/ES2223148T3/es not_active Expired - Lifetime
- 1999-01-15 DK DK99100700T patent/DK0938939T3/da active
- 1999-01-15 PT PT99100700T patent/PT938939E/pt unknown
- 1999-01-15 EP EP99100700A patent/EP0938939B1/de not_active Expired - Lifetime
- 1999-01-15 SI SI9930645T patent/SI0938939T1/xx unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE461896C (de) * | 1928-06-29 | Groh C | Vorrichtung zum selbsttaetigen Stillsetzen von Maschinen, welche bandfoermiges Material in periodischem Vorschub verarbeiten | |
US4255999A (en) * | 1978-11-17 | 1981-03-17 | Pacific Roller Die Co., Inc. | Method and apparatus for removing camber from strip |
EP0015358A1 (de) * | 1979-03-07 | 1980-09-17 | VOEST-ALPINE Aktiengesellschaft | Einziehvorrichtung für eine Bandbearbeitungsanlage |
US4567799A (en) * | 1984-02-27 | 1986-02-04 | Braner Enterprises, Inc. | Shiftable pinch roll and strip-feed device for a slitter |
EP0284217A1 (de) * | 1987-02-27 | 1988-09-28 | BARNES, Austen Bernard | Funktionsstörungsdetektor |
EP0737115B1 (de) * | 1993-12-30 | 1997-10-01 | Dalcos S.R.L. | Zangen-vorschubgerät für metallstreifen |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002064281A1 (en) * | 2001-02-13 | 2002-08-22 | Dalcos S.R.L. | Gripper feeder for metal strip |
ITVI20110337A1 (it) * | 2011-12-27 | 2013-06-28 | Athena Spa | Apparato per la lavorazione in continuo di un materiale laminare avvolto in bobina e metodo di lavorazione in continuo di un materiale laminare avvolto in bobina |
CN103658432A (zh) * | 2012-09-19 | 2014-03-26 | 周德林 | 一种板材成型机的进料装置 |
Also Published As
Publication number | Publication date |
---|---|
ATE270931T1 (de) | 2004-07-15 |
DE69918581T2 (de) | 2005-08-11 |
SI0938939T1 (en) | 2004-12-31 |
DK0938939T3 (da) | 2004-10-25 |
IT1306461B1 (it) | 2001-06-11 |
ITVE980006A1 (it) | 1999-07-30 |
PT938939E (pt) | 2004-11-30 |
DE69918581D1 (de) | 2004-08-19 |
EP0938939A3 (de) | 2001-01-24 |
ITVE980006A0 (it) | 1998-01-30 |
ES2223148T3 (es) | 2005-02-16 |
EP0938939B1 (de) | 2004-07-14 |
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