EP0204018B1 - Stanzpresse - Google Patents

Stanzpresse Download PDF

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Publication number
EP0204018B1
EP0204018B1 EP85107002A EP85107002A EP0204018B1 EP 0204018 B1 EP0204018 B1 EP 0204018B1 EP 85107002 A EP85107002 A EP 85107002A EP 85107002 A EP85107002 A EP 85107002A EP 0204018 B1 EP0204018 B1 EP 0204018B1
Authority
EP
European Patent Office
Prior art keywords
carriage
stamping
punch
stamping machine
fact
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
Application number
EP85107002A
Other languages
English (en)
French (fr)
Other versions
EP0204018A1 (de
Inventor
Arnold Ochsner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SEQUINS INTERNATIONAL Inc
Original Assignee
SEQUINS INTERNATIONAL Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to US06/568,299 priority Critical patent/US4535617A/en
Application filed by SEQUINS INTERNATIONAL Inc filed Critical SEQUINS INTERNATIONAL Inc
Priority to AT85107002T priority patent/ATE49359T1/de
Priority to EP85107002A priority patent/EP0204018B1/de
Priority to DE8585107002T priority patent/DE3575268D1/de
Publication of EP0204018A1 publication Critical patent/EP0204018A1/de
Application granted granted Critical
Publication of EP0204018B1 publication Critical patent/EP0204018B1/de
Expired legal-status Critical Current

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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
    • B21D43/028—Tools travelling with material, e.g. flying punching machines

Definitions

  • This invention relates to a stamping machine and in particular is directed to a stamping machine devoid of material feeding accessories, stamping and/or forming dies and material piloting devices, while yet achieving high production speeds and accuracy in pitch, form and quality.
  • stamping machines use hitch type feeds which advance the material to be stamped and/or formed through one or a series of dies mounted in a stamping press, the finished product then being collected after discharge from the stamping operation after being acted upon by the die or dies.
  • the stamping press hits in a repetitive up-down motion, closing and opening the die in one positive movement every short fraction of the stamping press cycle, the material then, with the die open, being advanced one pitch into its next dormant position, ready to receive the next closing and opening sequence of the die by the said roll or hitch feeding machine.
  • AU-A-117,045 discloses an apparatus for stamping material according to the pre-characterising part of claim 1 in which a carriage carrying a punch and die apparatus is reciprocally actuated in a predetermined time sequence by power driving means and the punch is disposed to engage the material during stamping and to thereafter move the material while so engaged a distance determined by the power driving means.
  • Stamping means coupled to the power means actuate the punch according to the predetermined time sequence and means are provided for clamping and releasing the material in the time sequence.
  • the present invention provides a strip material stamping machine comprising
  • a further object of the invention is to provide a stamping machine which can run at very high speeds and considerable accuracy; is simple and economical, to operate; is rugged, durable and contains relatively fewer moving parts to maintain and adjust.
  • Figures 1-3 diagrams illustrating a carriage 1 bearing die 2 and reciprocated by a crank arrangement 3, motor driven' the hub of which is equipped with an eccentric 4 which dimensionally provides for the desired pitch plus a dwell period at each end of the carriage travel.
  • the dwell period is timed to the dwell provided by the stamping components of the machine.
  • heavy blocks 5 and 5a are affixed to the rails 6 on which said carriage travels. The carriage travels within the limits of these blocks upon its back and forth movement.
  • This dimension, adjustable, is the desired pitch dimension and must never exceed the full stroke of the crank less a certain minimum dimension providing for the necessary dwell periods utilized by the die performing its function properly.
  • This arrangement actually causes the carriage to impact with a block at each end of its back and forth movement. This means that the accuracy of the pitch is established by the carriage being brought firmly and positively into contact with the blocks, the distance therebetween being called the pitch.
  • the carriage 1 approaches the block 5 at the end of the stroke period at a reduced speed so that after contact is made the carriage changes direction. Hence at the point of contact the carriage reaches zero speed so that at contact the noise level should be minimal. It is also possible to reduce noise at the point of contact by coating the block and carrier at their interfacing surfaces 5a, 6a with material designed to reduce noise to low tolerable levels.
  • a crank 5' attached to the eccentric 4, imparts reciprocating motion to the carriage by means of an impellor 7 which consists of a push rod 8 equipped at both ends (designed to function in each direction of the carriage travel) with buffer springs 9. These springs are sufficiently stiff to propel the carriage into contact with the blocks 5a and 5. After actual contact takes place the continuing stroke of the crank causes the spring to compress, trapping the carriage between it and the block with growing power, until the rotation of the crank reverses the direction of the impellor rod. At this point it must be noted that the carriage (die) is in the dwell period and motionless, until the carriage is brought into its reverse motion by the spring at the opposite end of the impellor rod by the crank eccentric as the first spring loses contact with the carriage. These springs also act as dampeners, lessening the shock of the impact referred to herein.
  • the linear speed of the crank-operated impellor 7 is not constant, but diminishes as the crank approaches the end of its stroke to give speed linearly at that exact point where it reverses direction, then accelerates to top speed at the high point of its eccentric, to diminish this speed to a stop at the point in rotation where it must again reverse direction.
  • This speed factor is exploited by locating the dwell period at each end of the carriage back and forth movement; just before and just after reversal of travel when linear speed of movement is very low or zero a stop in the period of time when the various activities required by this system are performed, as shown specifically in Figure 1 which depicts the time- movement diagram of the system.
  • the die is open (a) on carriage, returning from its mission of delivering stamped material to the discharge point, carriage collides with limiting block and comes to complete stop, clamped in place, as crank proceeds onward to point of reversal of direction; at point of reversal stamping action takes place and punch penetrates material; clamp keeping material in position releases; carriage resumes movement in reverse direction as impellor picks it up, the die remaining closed with its punch through the material acting as a positive clamp, and travels to point of impact and halted; material clamp closed, to lock material securely in position; die opens, completing the stamping operation and freeing itself from the material; carriage reverses direction with die open, and the entire sequence of activity repeats itself.
  • Figure 1 shows the timing sequence as a function of the eccentric
  • Figure 3 shows physically how the operation may be observed.
  • the clamp 15 is closed on material 16 and the die stamp 17 has stamped the material.
  • the clamp 15 opens and the die stamp 17 still remains within the material.
  • the stamp still within the material transports the material, the extent of the pitch movement 18 of the carriage to which it is attached.
  • the clamp 15 closes and the stamp lifts off the material, the clamp holding the material firmly in place.
  • the stamp is carried back to the extent of the pitch 18 movement of the carriage in the reverse direction from the place of beginning to complete the cycle.
  • a feature of the stamping press is the incorporation of the clamping device operated by the stamping component assembly to assure positive timing.
  • This device clamps the material being processed firmly in position except from the moment the die has penetrated the material at which time it assumes the role of the clamp before it (the die) resumes motion.
  • the die draws the material to the discharge end of the production cycle, to the position in time when the die is halted by the pitch block, at this point the clamp closes before the die opens to release the material.
  • the die may return to its starting position without affecting the positioned material; this procedure guarantees that the material is always clamped tight, by the die closed, by the die and the clamps closed or the clamp closed. Freedom to move is never accorded the material at any time during the production cycle.
  • the stamping process one of the reasons for the high accuracy is the stamping process.
  • FIG 4, 5 and 6 various views of such a machine, said machine in particular comprising a frame 20 mounted to a base 21 and having side walls 22 and 23, each fixedly supporting a pair of spaced apart support rods 24 and 25. Intermediate said walls is positioned a channel-shaped carriage mechanism 26 slidably supported by said pair of spaced-apart support rods and having freedom of longitudinal movement along said support rods. Mounted to said support rods and bridging said carriage are pairs of retaining rings 27, 28 and 29, 30 each pair being fixedly mounted to the support rods and spanning the carriage mechanism.
  • each bridging pair 27, 29 and 28, 30 less the length of the well portion of the channel-shaped carriage constitutes the pitch or travel of the carriage when undergoing its cyclic movements.
  • the facing of the retaining rings represent the barrier or retaining wall against which the carriage impinges, as discussed previously with respect to the operating principles of the invention.
  • stamping die apparatus consisting of punch 31 and die 32, each disposed to ride with the carriage during its cyclic movements as a unit or combination thru the facility of slide posts 31a and 32a.
  • the punch portion of the stamp die apparatus is activated by the operation of stamping post mechanism 35.
  • the stamping post mechanism comprising a pair of vertically positioned stamping parts 36 and 37, each straddling the carriage mechanism 26 and bridged by a support bar 38 to which it is attached by nuts 39 and 40 at the upper extremities thereof.
  • the lower extremities of said stamping posts are supported by coil springs 41 and 42 which are in turn attached to the base 21.
  • the stamping post is driven in a vertical direction by a cam mechanism 43 so disposed as to provide the cyclic variation previously described with respect to the time sequence of the various functions.
  • the cam is so designed as to assure the opening and closing of the punch at the proper time during the sequence of operations of the various units making up the machine.
  • the cam is designed to have dwell periods in timed relationship to each end of the crank stroke and is suitably driven by a belt 60a or other linkage mechanism to the driving mechanism 60b powering the eccentric.
  • a clamping mechanism 50 for suitably and reliably clamping the material to be stamped is shown in said Figures 4 and 5 and is controlled by a linkage device 51 which has an extremity thereof connected to a clamping post 52 and the other extremity connected to the stamping post 35, both extremities having rotatable rollers attached thereto for positively engaging both the stamping and clamping posts.
  • the linkage is pivotally mounted to the frame and is made operable by the controlled time operation of the stamping posts.
  • the movements of the stamping die apparatus atop the carriage is further made feasible by the use of hangers 54 and 55 connected to bridging bar 38.
  • the punch portion 31 of the stamping mechanism has elongated grooves 56 and 57 along which the hook portions 58, 59 are free to ride.
  • the lifting of the punch from the die or material is accomplished by the hangers which are in turn connected to the bridging bar which is in turn connected to and actuated by the stamping posts.
  • the movement of the punch and die with the carriage permits the punch portion to slide or move relative to the hangers the length of the pitch movement previously mentioned.
  • the punch and die are permitted freedom of movement with the carriage in a horizontal direction while the stamping of bridging-bar remains free to move only in the vertical direction and not horizontally.
  • the punch and die move together on the carriage as a unit through the facility of the slidable posts 31 a, 31 b.
  • the posts are fixedly attached to the base or die and the punch slidably moves vertically with respect to such posts. This is schematically shown in Fig. 2 and again in Fig. 9.
  • Figure 8 shows a system for preventing rebound, to prevent the carriage mechanism from bouncing off the retaining walls when impact takes place and thereby interfering with the accurate positioning of the die and/or material.
  • the system comprises a pulley 60 belt driven by a belt 68 and shaft connected to an eccentric 61 via shaft 62.
  • the eccentric 61 is coupled to a crank 63 link-connected to an impellor assembly 64 which is in turn connected to carriage 26 previously described.
  • the power drive permits the carriage to undergo reciprocal action, also previously described.
  • latch 71a rotates in a direction which blocks carriage 26 from moving, and similarly the other latch 71 b when the carriage moves in the other direction performs the same function. Both latches are phased 180 degrees apart to effect the proper function.
  • the pulley 60 as stated is drawn by a belt 68 which is connected to pulley wheel 68a connected to shaft 68b.
  • the shaft 68b is driven by a relatively, large pulley wheel 69a which is belt connected via belt 69a to an external motor or power source not shown. Also connected to shaft 68b and driven thereby are the stamping post mechanism 35.
  • FIG. 7 One form of impellor assembly driven by the eccentric is shown in Figure 7 and comprises an impellor rod 70 surrounded by a barrel 71 exter- - nally threaded at both extremities and threadably engaged by a pair of internally threaded end caps 72 and 73. Intermediate said impellor rod and barrel in proximity to said end caps are a pair of support bearings 74, 75, for substantially completing the impellor assembly, with the exception of a split-collar insert 76.
  • the impellor assembly, as shown, with its springs reciprocates slightly within the limits imposed by the inside surfaces of the carriage so that as one spring compresses to force carriage wall against pitch limit in one direction, the other can exert its pressure only on the other inner surface of said carriage.
  • Figure 9 shows schematically a system for mounting multiple dies on a single carriage and in general comprises an eccentric drive 80 connected to an impellor assembly 81 which imparts reciprocal motion to a carriage 82 upon which there is attached and movable therewith a plurality of dies 83, 84 and 85 which typically are used for blanking, stamping and forming respectively.
  • an eccentric drive 80 connected to an impellor assembly 81 which imparts reciprocal motion to a carriage 82 upon which there is attached and movable therewith a plurality of dies 83, 84 and 85 which typically are used for blanking, stamping and forming respectively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Punching Or Piercing (AREA)
  • Press Drives And Press Lines (AREA)

Claims (8)

1. Stanzpresse für Bandmaterial mit
einem Traggestell (20),
einem vom Gestell (20) abgestützten und längs eines Bandvorschubweges hin und her bewegbaren Bandvorschubschlitten (26),
einer oder mehreren Stempel- und Gesenkvor- richtung(en) (31, 32), die vom Schlitten (26) getragen wird (werden) und einen Stempel (31) aufweist (aufweisen), der angeordnet ist, um beim Stanzen mit dem Material in Eingriff zu gelangen und danach das Material, während so der Eingriff vorliegt, über einen Abstand zu bewegen, der durch die Bewegung des Schlittens (26) festgelegt ist,
einem einen Exzenter (61) aufweisenden Kraftantrieb (67, 68) zum hin- und hergehenden Betätigen des Schlittens (26) in einer vorherbestimmten Zeitfolge,
einer Preßeinrichtung, die mit dem Exzenter (61) verbunden ist, zum Betätigen des Stempels (31) gemäß der vorherbestimmten Zeitfolge, und
einer Materialklemmeinrichtung (50), die durch die Betätigungen der preßeinrichtung (35) gesteuert ist, um das Material in der zeitlichen Folge festzuklemmen und freizugeben, gekennzeichnet durch Barrierewände (27-30), die Grenzflächen zu dem Schlitten (26) aufweisen und die Hin- und Herbewegungen des Schlittens (26) durch Kontakt mit den Wänden (27-30) begrenzen, und durch eine Halteeinrichtung (71a, 71b), die mit dem Kraftantrieb (67, 68) verbunden und angeordnet ist, um mit dem Schlitten (26) beim Kontakt mit der Wand in Eingriff zu gelangen, um den Schlitten (26) nach dem Kontakt mit der Wand (27-30) gegen diese festzuhalten.
2. Stanzpresse nach Anspruch 1, dadurch gekennzeichnet, daß der Exzenter (61) am dem Schlitten (1) über eine Feder (9) verbundene Einrichtung angebracht und angeordnet ist, um Stillstandszeitdauern an beiden Enden des Hin-und Herweges zu erzeugen.
3. Stanzpresse nach Anspruch 2, dadurch gekennzeichnet, daß die Feder-verbundene Einrichung (9) eine Triebstangeneinheit (64) aufweist, die mit dem Schlitten über Federn (9) an beiden Enden verbunden ist, die je angeordnet sind, um es dem Exzenter (61) und einem den Exzenter (61) mit der Federeinrichtung (9) verbindenden Gestänge (63) zu ermöglichen, sich für eine Zeit über den Punkt des Anschlagens zwischen Schlitten (26) und Wand (27-30) weiterzubewegen.
4. Stanzpresse nach Anspruch 3, dadurch gekennzeichnet, daß die Federn (9) Schraubenfedern sind, die die Triebstangeneinheit (64) umgeben.
5. Stanzpresse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Kraftantrieb eine Welle (66) aufweist, und die Einrichtung zum Festhalten des Schlittens (26) gegen die Wände (27-30) nach Kontakt damit in Abstand voneinander vorgesehene nockenartige Anschläge (71 a, 71 b) aufweist, die daran in radial entgegengesetzter Phasenlage angebracht und je angeordnet sind, um mit dem Schlitten (26) an entgegengesetzten Enden seines hin- und hergehenden Hubes nach jedem Auftreffen auf der Wand (27-30) in Eingriff zu gelangen, um ein Prellen an der Wand zu verhindern.
6. Stanzpresse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die vom Schlitten abgestützte Stempel- und Gesenkvorrichtung (31, 32) eine Mehrzahl von Stempeln und Gesenken (83-85) aufweist, die je angeordnet sind, um an ein und demselben Material zu arbeiten, um verschiedene Konfigurationen zu erzeugen.
7. Stanzpresse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Klemmeinrichtung eine Gestängeeinrichtung (51) aufweist, die mit der Preßeinrichtung (35) zum Betätigen der Klemme in der zeitlichen Folge verbunden ist.
8. Stanzpresse nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Schlitten (26) oder die Barrierwände (27-30) einen Materialüberzug darauf enthält (enthalten), um die Geräuschpegel beim Kontakt zwischen dem Schlitten (26) und den Wänden (27-30) zu minimieren
EP85107002A 1984-01-05 1985-06-05 Stanzpresse Expired EP0204018B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US06/568,299 US4535617A (en) 1984-01-05 1984-01-05 Stamping machine
AT85107002T ATE49359T1 (de) 1985-06-05 1985-06-05 Stanzpresse.
EP85107002A EP0204018B1 (de) 1985-06-05 1985-06-05 Stanzpresse
DE8585107002T DE3575268D1 (de) 1985-06-05 1985-06-05 Stanzpresse.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP85107002A EP0204018B1 (de) 1985-06-05 1985-06-05 Stanzpresse

Publications (2)

Publication Number Publication Date
EP0204018A1 EP0204018A1 (de) 1986-12-10
EP0204018B1 true EP0204018B1 (de) 1990-01-10

Family

ID=8193548

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85107002A Expired EP0204018B1 (de) 1984-01-05 1985-06-05 Stanzpresse

Country Status (3)

Country Link
EP (1) EP0204018B1 (de)
AT (1) ATE49359T1 (de)
DE (1) DE3575268D1 (de)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR568533A (fr) * 1923-07-10 1924-03-28 Appareil pour perforer, marquer, graver, comprimer, etc., à intervalles réguliers une bande se déplaçant d'un mouvement uniforme continu
NL126925C (de) * 1961-12-06 1900-01-01
JPS551986A (en) * 1979-04-11 1980-01-09 Daido Kogyo Co Ltd Synchronous type continuous processing appratus

Also Published As

Publication number Publication date
DE3575268D1 (de) 1990-02-15
EP0204018A1 (de) 1986-12-10
ATE49359T1 (de) 1990-01-15

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