DE2112743A1 - Method and device for stretching a long workpiece - Google Patents

Description

DIPL.-ING. DR. JUR. ^ W. BÖHME 8500 NO RN BERG, den . * _o

DIPL-ING E. KESSEL ^% Frauemorgraben 73 (am Plärrer) V- "<£

VnAilur Telephone: (0911) 227362, 204296, 204297

.BÖHME telegram address: PATBOM

PATENT LAWYERS

Bank account: Deutsche Bank Nuremberg No. 137315
Postal checking account: Nuremberg Office No. 44852

Applicant: company Lansenstein & Schemann Aktiengesellschaft

Title: Method and device for stretching a long workpiece

description

The invention relates to a method for hedging a long piece, "in which the workpiece is held at one end so that it can be rocked is, rests on a lower fixed horizontal saddle, the horizontal saddle with its other end, which is supported from below, protrudes, is rotated about its longitudinal axis and after each stretching process carried out with an upper stretching saddle that can be moved up and down in the direction of its longitudinal extension is moved. The invention also relates to an apparatus for carrying out this method.

If you are stretching a long workpiece, e.g. a truck front axle, one end of the workpiece protrudes freely over the lower horizontal saddle, this not only facilitates the transport of the workpiece between two reek processes, but rather can also bend the protruding end piece in all directions with every stretching process. Will turn the workpiece at one end "an axis running at right angles to the longitudinal extension of the workpiece can be rotated, i.e. rocked, but otherwise rigid and

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gellalten immobile, every stretching process also leads to a kink in the workpiece.

It is known to avoid these specialist parts (Industrie-Anzeiger STr. 84 from 6 * 10.1970, pages 2017 to 2021), the workpiece to be held at both ends so that it is perpendicular to each stretching process over its entire length can lower its longitudinal extent. That with this well-known Procedure necessary lowerable holding of both ends of the Vferk piece will be as? felt too expensive.

Based on the state of the art (Industrie-Anzeiger No. 84 from October 6, 1970, pages 2017 to 2021), a device may be considered "known to have a press, a manipulator on one side of the press, and a support device on the other side of the press and in which the press has a lower fixed and an upper one, has movable horizontal saddle and the manipulator is provided with a rockable and rotatable rod. at With a device of this type, bending of a workpiece during a stretching process can be avoided if the pliers not tiltable but lowerable and also the support device Is arranged lowerable.

An object of the present invention is to provide a method

of the type mentioned at the beginning, in which the workpiece is held rockable to design such that kinks in the workpiece oime a retractable bracket or support

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the ends of the workpiece are avoided. Object of the invention is also to provide a device for stretching a long workpiece, ciie on a lowerable arrangement of tongs and Support device dispensed with and yet a kink-free stretching of the front piece allows.

The invention provides a method of the type mentioned at the outset, which is characterized in that the end piece of the piece, supported from below, is pressed from above against the support taking place from below during each stretching process and a rotation of the, V'erkstückes is carried out in the same direction. The turning angle after each stretching process is dimensioned so that the workpiece is gradually corrected in all bending directions.

The invention also sees a device: with a press, one. Tianipule / tor on one side of the press and a supporting device aiif to the other side of the press, with the Press has a lower fixed and an upper, movable horizontal saddle and. the manipulator is suspended from a rocker and rotatable pliers is provided, which is characterized in that one after each stretching process in the same Direction of rotation of the pliers provided and on the opposite side of the press on the pliers on each horizontal saddle a straightening plate is attached.

The '.Yerkst-ick is firmly clamped in the pliers and rests on it open the lower ..ecksp.ttel. Press i / honoring the stretching process

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the two horizontal saddles insert themselves equally deep into the workpiece. ■ The central axis of the workpiece over the lower horizontal saddle is down by the penetration depth of a horizontal saddle relocated. If one now assumes that the Yerkstückteil located behind the horizontal saddle is parallel during the stretching is shifted downwards with the front part a kink between the horizontal saddle and the pliers at the height of the horizontal saddle. This kink is corrected again and again when the workpiece rectified by one after each stretching process corresponding v / angle is rotated. The cause of the kink is that the tongs are not parallel due to the rocker arrangement Relocation of the ferkstückaehse during the forming process.

It is now possible that the end of the piece behind the horizontal saddle also kinks off during the Unforraens due to some influences, for example asymmetrical horizontal labels. This ^K .'erkstückie has blank dimensions over its entire length, since the feed during stretching is always on the gripper side away from the press. Since the kinking behind the horizontal saddle cannot be corrected by turning in the same direction, the straightening plates are provided on this side. The lower and the lower horizontal saddle are fixedly arranged, while the upper straightening plate is moved up and down with the upper horizontal saddle. The straightening plate plane is set back by a certain amount compared to the horizontal saddle plane. The possibly kinked end of the workpiece is straightened with each stretching process. The minimum distance between the two plates occurs when the horizontal saddles have the largest

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have reached penetration depth . This means that the workpiece in question cannot exceed a certain buckling. This is particularly important because if the kink was too large, it would no longer be possible to turn the workpiece.

It is advantageous if the sliding movement after the rotary movement bzxv, both. Movements are initiated at the same time. It is possible that the piece adheres more or less firmly to the lower saddle after a stretching process. When turning, the workpiece is released from the lower Λ horizontal saddle without difficulty.

The longer the straightening plates, the better the directional effect, i.e. the smaller the kink angle, the ideal straightening plate length is equal to the length of the workpiece behind the horizontal saddles. For practical reasons, however, the straightening plates are kept shorter than the workpiece «

In the drawing, an embodiment of the invention is shown and seigt *

Pig. 1 shows a side view of a press with manipulator, Pig. 2 shows a side view according to line II-II in Pig. 1 and Pig. 3 shows a section along line IH-III in Pig. 1.

To a device according to a normal drawing press with a lower fixed part stretching saddle 2 and an upper movable up and _down% stretching saddle 3, which is attached to a piston rod \. 4 The press 1 is in a manner known per se

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and is therefore not described in detail here. Me two horizontal saddles 2, 3 are located between two side stands 5 of the press, of which in Pig. 1 only one is shown.

On the lower horizontal saddle 2 is a stationary lower straightening plate 6 attached; with the upper horizontal saddle 5 is an upper straightening plate 7 connected. The two straightening plates 6, 7 are arranged one above the other; and extend in the direction of a long Workpiece that; is on the lower horizontal saddle 2. The protruding over the lower horizontal saddle 2 free end of the Workpiece 8 rests on lower straightening plate 6 during the forming process. The straightening plates 6, 7 are elongated and have a rectangular cross-section so that its surface in contact with the workpiece is flat.

On the side of the press 1 opposite the straightening plates 6, 7 there is a manipulator 9 of a known type. Of the Manipulator 9 has a carriage 10 which can be moved on rails 11 is. A frame 12 is provided on the carriage 10, which is connected to the carriage 10 on the side facing away from the press 1 connected tabs 13 is attached so that it is a running at right angles to the longitudinal extent of the lerkstüekes 8 Axis 14 can be rotated, i.e. tilted. On the press 1 facing side of the manipulator 9 are provided between the carriage 10 and the frame 12 spring devices 15. Me Pedestrian devices are lockable so that when you leave

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moving the finished / component this must be held horizontally can.

Ir: i order 12 a clamp carrier tube 16 arranged in the horizontal direction is rotatably mounted. The rotation of the pincer door takes place from a Kotor 17 attached to the jestell 12 via gears 15 ., which at the forceps 19 d ^ egentiberliegenden side of the intended 3-Estelles 12 2C is actuated device 20 19 operates the Zan _v e a is arranged in the caliper support tube 16, in the drawing, not shown in detail: ^est: inge. J in a clamp carrier tube rotatably arranged in a jestell, the clamps of which can be actuated via a? 3-esti> n _o e arranged in the clamp carrier tube, is known per se (German patent specification 1 292 111), so that here a more detailed description of the means zuu turning and now the pliers is not necessary.

.I'enn with the licking of the. »'erketückes 3 is started, so is the manipulator 3 is close to the press 1 and the tongs 19 close to the: tec - saddles 2,3. -Yes held by the pincers 19 V / Erkstück 8 ra ^ t with the essential part of its length between the Tiecksstteln 2,3 through. A more serious process takes place, inaea itself: the upper leak saddle 3 downwards emotional. After the upper saddle 3 moves upwards again has, the pliers 19 is rotated by aera Lotor 17 by 90 °, so

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that the workpiece gradually "becomes rectangular" through the hedge Cross-section received. Soda.nn, the tongs 19 are moved away from the press 1 by one step. Now the next one can Stretching process take place.

The sliding movement of the pliers can be done in such a way that only the days are moved step by step. However, ss is also possible to ¥ recite a constant speed driving away from the press to let the forceps during a Jieckvorganges is in 3.aum and moves away to a .Step from the press after each hedge transaction. The step-by-step dioling and moving of the forceps can be controlled via a suitable control device depending on the movement of the upper triangular saddle. It is also possible - instead of a manipulator that can be moved on a floor - to provide a manipulator arranged in a hanging manner.

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Claims (2)

Claims .) Method for turning a long workpiece, in which the workpiece is held at one end so that it can be tilted, rests on a lower fixed horizontal saddle, the horizontal saddle with its other linden, which is supported from below, protrudes, is rotated around its longitudinal axis and after each with an upper up and down moving saddle is shifted stretching process carried out in the direction of its longitudinal extension, characterized in that the end piece of the 'workpiece supported from below is pressed from above against the support taking place from below during each stretching process and a rotation of the workpiece taking place after each stretching process is carried out in älöicher Riohtung. 2. Apparatus for performing the method according to claim 1, with a press, a manipulator on one side of the press and a support device on the other side of the press, wherein the press has a lower fixed and an upper, movable horizontal saddle and the manipulator with a The tongs (19) are provided so that they can be tilted and rotated, characterized in that the tongs (19) are rotated in the same direction after each stretching process and a straightening plate is provided on the side of the press (1) opposite the tongs on each stretching saddle (2, 3) (6.7) is attached " 209839/0455 BATH ORIGINAL Read e rst