EP3744436A1 - Presse à redresser et procédé de redressage par cintrage des pièces allongées - Google Patents

Presse à redresser et procédé de redressage par cintrage des pièces allongées Download PDF

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Publication number
EP3744436A1
EP3744436A1 EP20176912.2A EP20176912A EP3744436A1 EP 3744436 A1 EP3744436 A1 EP 3744436A1 EP 20176912 A EP20176912 A EP 20176912A EP 3744436 A1 EP3744436 A1 EP 3744436A1
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EP
European Patent Office
Prior art keywords
workpiece
straightening
receiving groove
press
machine table
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
Application number
EP20176912.2A
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German (de)
English (en)
Inventor
Leo Zirn
Rüdiger FRITZ
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.)
Grimm AG
Original Assignee
Grimm AG
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
Application filed by Grimm AG filed Critical Grimm AG
Publication of EP3744436A1 publication Critical patent/EP3744436A1/fr
Pending legal-status Critical Current

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    • 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
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/10—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts between rams and anvils or abutments

Definitions

  • the present invention relates to a straightening press and a method for straightening elongated workpieces.
  • Bend straightening is a forming process in which the concentricity deviation of a workpiece, usually an elongated workpiece such as a shaft or a pipe, is reduced to a value below a predefinable limit value.
  • a workpiece usually an elongated workpiece such as a shaft or a pipe
  • the workpiece to be straightened is rotationally symmetrical, but flat, cuboid workpieces can also be straightened. In this case, it is not the concentricity deviation that is reduced below the predefinable limit value, but the deviation from an ideally straight longitudinal axis. Such deviations are referred to below as straightness deviations.
  • Bend straightening is often referred to simply as straightening, so that the terms "bending straightening” and “straightening” are used synonymously in the following.
  • a workpiece whose length is at least three times as large as its diameter should be regarded as an elongated workpiece.
  • the bending straightening process essentially comprises two steps.
  • a first step the actual value of the concentricity deviation of a workpiece is determined.
  • the workpiece is typically rotated completely around its own longitudinal axis at least once with a drive device and the concentricity deviations are determined via the angle of rotation with a correspondingly designed measuring device. It can therefore be determined at which angle of rotation there is the highest concentricity deviation.
  • a second step that will The workpiece is placed on a workpiece holder in such a way that the section of the workpiece that has the greatest concentricity deviation points upwards. The workpiece is pressed down with a straightening punch. The two steps are repeated until the set-actual value deviation is within the desired range.
  • the first step i.e. the step for determining the concentricity deviation
  • the workpiece in question is clamped at its two end faces between two receiving tips of the drive device and then rotated around its own longitudinal axis.
  • the workpieces On the two end faces, the workpieces have conical depressions into which the receiving tips are introduced in order to align the workpiece such that the longitudinal axis of the workpiece is aligned with the axis of rotation of the drive device.
  • the object of one embodiment of the invention is therefore to propose a straightening press with which it is possible with simple and inexpensive means, a device and a To propose methods for straightening elongated workpieces with which a reliable determination of the concentricity deviations and straightness deviations is made possible in a simple, time-saving and inexpensive manner.
  • the straightening press is designed in such a way that the determination of the concentricity deviation and / or the straightness deviation and the subsequent bending straightening are carried out when the workpiece in question is received in the workpiece holders is.
  • the determination of the concentricity deviation is not carried out using two receiving points, so that with the present straightening press the errors in determining the concentricity deviations that are caused by insufficiently precisely manufactured conical depressions are avoided. Since the workpiece is located in the workpiece holders both in the step of determining the concentricity deviation and / or the straightness deviation and in the bending straightening step, the position of the workpiece in question does not have to be changed between the two steps.
  • the drive device with which the workpiece is rotated about its own longitudinal axis can be designed more simply, since it does not have to be able to bring the workpiece into the workpiece receptacles.
  • the straightening unit has, in addition to the straightening stamp, a pressure stamp which ensures that the workpiece that is to be straightened is pressed into the receiving groove of the workpiece mounts when determining the concentricity deviation and / or the straightness deviation. This ensures that the workpiece in question is clearly positioned when determining the concentricity deviation and / or the straightness deviation even when the workpiece is accelerated and decelerated by the drive device.
  • the receiving groove it makes sense to design the receiving groove to be fixed and, in particular, not to be rotatable.
  • the workpiece is stored on two rotatable rollers that are not to be regarded as receiving grooves. The rollers always have a certain concentricity deviation, which is transferred to the workpiece to be straightened and thus negatively influences the achievable accuracy of the straightening process.
  • Fixed locating grooves can be manufactured much more precisely than rollers, so that greater precision can be achieved.
  • the drive device is designed to move the workpiece along the longitudinal axis. If the straightness deviation of a workpiece that is not rotationally symmetrical, for example a cuboid, flat workpiece, is to be determined and possibly reduced below a certain limit value, turning about the longitudinal axis makes no sense.
  • the workpiece is placed with one of its two side surfaces on the workpiece receptacles and moved by the drive device along the longitudinal axis.
  • the measuring device measures the deviation of the distance between the workpiece and the measuring device from the target distance over the length of the workpiece, whereby the straightness deviation can be determined.
  • the workpiece is then straightened in the manner described above.
  • the workpiece in question can be moved along the longitudinal axis in such a way that the straightening punch can act on the workpiece where the greatest deviation from straightness is present, whereby the deviation from straightness can be reduced particularly effectively.
  • the measurement of the concentricity deviation and / or the straightness deviation and the subsequent straightening can be carried out repeatedly on a workpiece.
  • the straightening press comprises a rotation sensor for detecting the rotational movement of the workpiece.
  • a rotation sensor for detecting the rotational movement of the workpiece.
  • the workpiece may slip through with respect to the relevant parts of the drive device. In extreme cases it can happen that the workpiece is not rotated at all. This can occur in particular if the components to be adjusted are shorter than intended.
  • the assumed assignment of the measured concentricity deviation to the angle of rotation is then unusable.
  • the rotation sensor can be used to determine whether the workpiece has been rotated by the same angle of rotation as specified by the drive device. Deviations as a result of slip or the like can be determined and the assignment of the measured concentricity deviation to the angle of rotation corrected or a new measurement can be initiated. While the concentricity deviations can be determined without contact with sufficient accuracy, for example by means of a laser, the determination of the angle of rotation without contact is only possible to a limited extent. It is therefore advisable for the rotation sensor to have a wand that rests on the workpiece. The relative movement between the wand and the workpiece creates friction that can be used to determine the angle of rotation. The rotation sensor increases the precision and effectiveness of the straightening process.
  • the pressure ram is spring-mounted. Because the pressure ram is spring-mounted, damage to the workpiece in question is avoided, in particular when determining the concentricity deviation and / or the straightness deviation.
  • workpieces with different diameters can be straightened within certain limits with the straightening press according to this embodiment, without the straightening press having to be converted for this purpose. As a result, the straightening press according to this embodiment can be used flexibly.
  • the receiving groove can be designed as a prism groove.
  • a prism groove which can have a V-shaped cross section, for example, it is possible to introduce workpieces with different diameters into the workpiece holders without having to change the workpiece holders. The workpieces only rest on the prism groove at two points and are therefore positioned very precisely.
  • the workpiece holders can be movably attached to the machine table by means of an adjusting device.
  • the adjusting device can comprise, for example, one or more servomotors with control.
  • the workpiece holders can be moved towards and away from one another and / or towards and away from the straightening unit. In the event that the workpiece holders can be moved towards and away from one another, workpieces of different lengths can be aligned. In the case of long workpieces in particular, it can be the case that concentricity deviations and / or straightness deviations have to be corrected at several sections along the longitudinal axis.
  • the workpiece holders can be arranged in such a way that a relevant concentricity deviation and / or the straightness deviation can be eliminated particularly effectively.
  • workpieces with different diameters can be positioned in relation to the drive device in such a way that their longitudinal axis does not change.
  • the entire machine table to which the workpiece holders are attached can also be designed to be movable accordingly. Modifications to the drive device are therefore not necessary, as a result of which the straightening press according to this embodiment can be used particularly flexibly.
  • the workpiece holder can have a friction-reduced surface at least in the region of the holder groove.
  • Such surfaces can be provided for example by means of a polytetrafluoroethylene coating (PTFE coating) or by means of a surface with a particularly low surface roughness.
  • PTFE coating polytetrafluoroethylene coating
  • the radial runout deviation and / or the straightness deviation is determined when the workpiece in question has been introduced into the workpiece receptacles. In particular when rotating the workpiece about its own longitudinal axis, but also when moving the workpiece along its longitudinal axis, the workpiece holders and the workpiece are consequently in contact with one another, so that friction occurs between the workpiece and the workpiece holders.
  • the drive device must overcome this friction, so that a certain amount of energy is necessary for this.
  • this friction causes a certain amount of abrasion both on the workpiece and on the workpiece holders. Both the energy required to rotate the workpiece about its own longitudinal axis and the abrasion can be reduced by providing a friction-reduced surface of the workpiece holders.
  • a further developed embodiment is characterized in that the drive device has a form-locking means and / or a frictional locking means for transmitting the rotary movement to the workpiece.
  • the interlocking means can for example have a projection with a non-rotationally symmetrical cross section, for example with a polygonal cross section, which engages in a corresponding recess. Both the projection and the recess can optionally be arranged on the workpiece or on the drive device his.
  • the frictional locking means can be designed, for example, in the form of a rubber block which is arranged on the drive device and via which the drive device comes into contact with the workpiece. In both cases, it is ensured that the rotary movement of the drive device is transmitted to the workpiece in question without slip. As a result, the measured concentricity deviation can be assigned exactly to a specific angle of rotation, which increases the precision of the bending straightening.
  • the straightening press has a spindle drive for moving the straightening unit.
  • very high forces usually have to be applied, which are usually in the region of 7 t.
  • a hydraulic cylinder is used to drive the straightening unit and in particular the straightening punch. This requires a pressure accumulator which requires a certain amount of space. As a result, the straightening press cannot be placed anywhere in a workshop. In addition, the noise generated by the hydraulic cylinder is comparatively high.
  • the straightening unit and in particular the straightening die is driven by means of a lever device which requires a comparatively large installation space.
  • the concentricity deviations and / or the straightness deviation can only be eliminated within certain limits.
  • the basic process deviations can only be reduced by up to 20 ⁇ m.
  • the spindle drive which can also be designed as a ball screw drive, it is possible in this embodiment of the present straightening press to reduce the concentricity deviations and / or to reduce the straightness deviation in comparable workpieces to down to 5 ⁇ m.
  • the spindle drive requires a comparatively small amount of space.
  • a further developed embodiment is characterized in that the spindle drive comprises an electric motor, in particular a servomotor.
  • an electric motor makes it possible to keep the generation of noise when driving the straightening punch particularly low.
  • the use of a servomotor enables a particularly precise reduction in the concentricity deviations and / or the straightness deviation.
  • Another embodiment is characterized in that the straightening press interacts with a feed and discharge device for feeding workpieces to be straightened to the straightening press and for discharging the workpieces straightened in the straightening press.
  • the straightening process can be largely automated.
  • the workpieces to be straightened are mass-produced items, this allows the processing time to be significantly reduced, whereby the unit costs can also be kept low.
  • the steps of the method can be repeated until the radial runout has been reduced to a value below a predetermined threshold value.
  • the step of measuring the runout can also be carried out in such a way that not only the largest runout, but also the second largest or the third largest concentricity deviation is determined. These concentricity deviations can also be reduced in the specified way.
  • the straightness deviation in particular of a workpiece that is not rotationally symmetrical, that is determined.
  • the straightness deviation the fact that the straightness deviation of the workpiece in question is measured when the workpiece is in the receiving groove of the workpiece receptacles, measurement errors compared to measurements carried out using receptacle tips, are avoided . Such measurement errors are due in particular to imprecise clamping of the workpiece between the receiving tips, which are avoided according to the proposal.
  • the distance between the workpiece holders can be changed in such a way that the measured run-out deviation or straightness deviation can be eliminated in a particularly targeted manner.
  • the Workpiece holders are moved relatively close to one another. If the straightness deviation extends over a larger section, the workpiece holders can be positioned at a greater distance from one another.
  • the section modulus of the workpiece in question can also be taken into account, so that the bending process can be carried out with minimal effort.
  • a straightening press 10 according to the invention is shown on the basis of a front view or on the basis of a perspective illustration.
  • the straightening press 10 is arranged in a machine frame 12, which in the Figure 2 is shown in isolation.
  • the machine frame 12 is designed so that two straightening presses 10 can be arranged next to one another, whereby the available floor space of a workshop can be used particularly effectively. It is also possible for two or more of the machine frames 12 to be arranged next to one another, so that a modular structure can be implemented according to the building block principle. However, the machine frame 12 can also only be provided for receiving a straightening press 10 (not shown).
  • the two straightening presses 10 are constructed largely identically, so that the following description relates to both straightening presses 10.
  • the straightening press 10 has a machine table 14 to which at least two workpiece holders 16 for receiving a workpiece 17 are attached (see also FIG Figures 5A to 5D ).
  • the workpiece holders 16 each have one Receiving groove 18 into which the workpiece 17 can be introduced.
  • the receiving groove 18 is designed as a V-shaped groove, which is also referred to as a prism groove 20 or a bezel.
  • the two workpiece receptacles 16 can each be moved independently of one another towards and away from the straightening unit 26 and towards and away from one another by means of an adjusting device 40 (see also FIG Figure 4 ).
  • the adjusting device 40 comprises a servomotor 41 with a controller (not shown).
  • the straightening press 10 also comprises a drive device 22 with which the workpiece 17 received in the workpiece receptacles 16 is rotated about its own longitudinal axis L (see in particular Figure 5C ) and moved along its longitudinal axis (see Figure 6C ) can be.
  • the drive device 22 can have a servomotor with control (not shown).
  • a measuring device 24 is provided (see Figures 5A to 5D ), with which the concentricity deviations of the workpiece 17 received in the workpiece receptacles 16 can be determined.
  • the measuring device 24 can, as in particular from the Figure 5C can be seen to determine the concentricity deviations of the workpiece 17 concerned without contact, for example with the aid of a laser beam.
  • measuring device 24 An embodiment of the measuring device 24 is not shown in which the measuring device 24 has a measuring probe with which the measuring device 24 rests on the workpiece 17 in order to determine the concentricity deviations. At this point it should already be pointed out that the measuring device 24 can also measure the workpiece 17 with two laser beams and thus at two spaced-apart locations (see in particular Figure 6C ).
  • the straightening press 10 is equipped with at least one rotation sensor 25.
  • the change in the rotational position of the workpiece 17 as a result of the action of the drive device 22 on the workpiece 17 can be determined with the rotation sensor 25.
  • it can be determined whether the workpiece 17 has actually been rotated by the same angular dimension as specified by the drive device 22.
  • a slip in particular when accelerating and decelerating the drive device 22, can thus be recognized.
  • the rotation sensor 25 can be integrated into the measuring device 24.
  • the straightening press 10 further comprises a straightening unit 26 which can be moved towards the machine table 14 and away from the machine table 14.
  • the straightening unit 26 has a straightening die 28 and two pressure dies 30, which are particularly good in the Figures 5A to 5D and 6A to 6D are recognizable.
  • the two pressure stamps 30 are each arranged to the right and left of the straightening stamp 28.
  • the straightening press 10 has a spindle drive 32 with which the straightening unit 26 can be moved toward and away from the machine table 14.
  • an electric motor 34 in this case a servomotor 36, is provided, the rotary movement of which is transmitted to the spindle drive 32 via a belt drive 38.
  • the straightening press 10 is in an initial state, in which there is still no workpiece 17 in the workpiece receptacles 16. It can be seen that the two pressure stamps 30 extend somewhat further towards the machine table 14 than the straightening stamp 28. The two pressure stamps 30 are each pretensioned with a spring 42 and are consequently spring-loaded.
  • a workpiece 17a which is to be straightened, is introduced into the workpiece receptacles 16, as shown in FIG Figure 5B emerges.
  • the workpiece 17a is rod-shaped and rotationally symmetrical.
  • the straightening unit 26 is then moved towards the machine table 14 as a result of the activation of the electric motor 34, so that the pressure stamps 30 press the workpiece 17a into the two workpiece receptacles 16.
  • the springs 42 are compressed somewhat in order to obtain the desired pressing force.
  • the straightening punch 28 does not touch the workpiece 17a.
  • the drive device 22 has two drive members 46 which can be moved parallel to the surface of the machine table 14 and which, as shown in FIG Figure 5C It can be seen that the workpiece 17a is approached until it comes into contact with the workpiece 17a.
  • the workpiece receptacles 16 are designed in such a way that the longitudinal axis L of the workpiece 17a is aligned as far as possible with the axis of rotation D of the two drive members 46.
  • the two drive members 46 are now set in rotation, the rotation of the two drive members 46 being transmitted to the workpiece 17a.
  • the drive members 46 have positive locking means 48 or frictional locking means 50 at their free ends, via which they come into contact with the workpiece 17a, in order to transmit the rotary movement to the workpiece 17a with as little slip as possible.
  • the measuring device 24 is now activated and the runout deviation of the workpiece 17a is determined.
  • the measuring device 24 is designed such that the concentricity deviations can be determined via the angle of rotation of the workpiece 17a.
  • the rotation sensor 25 is also activated.
  • the rotation sensor 25 has a wand 27 which, when activated, is extended to such an extent that the wand 27 comes into contact with the workpiece 17a. With the wand 27, relative movements between the wand 27 and the workpiece 17a can be registered. As a result, it can be determined by which angle of rotation the workpiece 17 a has actually been rotated and whether the angle of rotation corresponds to that which has been specified by the drive device 22.
  • the workpiece 17a is rotated with the drive device 22 about the longitudinal axis L in such a way that the greatest concentricity deviation points towards the straightening unit 26.
  • the straightening unit 26 is now moved further towards the machine table 14, so that the straightening punch 28 comes into contact with the workpiece 17a (see FIG Figure 5D ).
  • the straightening punch 28 applies such a high force to the workpiece 17a that it is bent towards the machine table 14 and plastically deformed, whereby the concentricity deviation is reduced.
  • the step of determining the concentricity deviation can now be repeated in order to determine whether the concentricity deviation has reached a value which is below a certain threshold value. If this is the case, the workpiece 17a in question can be removed from the straightening press 10. If the value is not yet below the threshold value, the workpiece 17a can be bent again with the straightening punch 28 towards the machine table 14. This process can be repeated until the value of the radial runout is below the threshold value. It can, however, be provided that only a certain number of repetitions are carried out in order to exclude that a workpiece 17a with a particularly high radial runout is straightened for an unnecessarily long time. In this case, it can make sense to declare the workpiece 17 in question as scrap and separate it.
  • a second embodiment of the method is shown.
  • the basic procedure is the same as that of the first exemplary embodiment, so that the differences are discussed below.
  • the rotation sensor 25 is not shown for reasons of illustration.
  • the rotation sensor 25 can, however, be used in the same way as described for the first exemplary embodiment.
  • a non-rotationally symmetrical workpiece 17b is to be straightened in this case.
  • the workpiece 17b has a rectangular cross section and can, for example, be a flat iron.
  • the workpiece holder 16 is correspondingly adapted to the shape of the workpiece 17b.
  • the drive members 46 are also adapted to the shape of the workpiece 17b.
  • the straightness deviation is expressed in the distances between the workpiece 17b and the measuring device 24 that change along the longitudinal axis. After the straightness deviation has been determined, the workpiece 17b is straightened in the manner described above.
  • the measuring device 24 uses two laser beams in order to determine the distance between the measuring device 24 and the workpiece 17b at two points with respect to the longitudinal axis L spaced apart.
  • the path by which the workpiece 17b has to be moved along the longitudinal axis L can be reduced, as a result of which time in the straightening process can be saved.
  • the entire workpiece 17b does not have to be measured. If the distance between the workpiece 17b and the measuring device 24 is known at two points, the course of the straightness deviation can be estimated over the entire workpiece 17b on the basis of empirical values and / or taking into account the bar theory. As a result, the distance by which the workpiece 17b has to be moved along the longitudinal axis L can be further reduced.
  • the measuring device 22 can use two laser beams or more than two laser beams for the reasons mentioned.
  • the workpiece holders 16 can be adjusted along the longitudinal axis L of the workpiece 17a, 17b so that the support points of the workpiece 17a, 17b can be changed relative to the straightening punch 28.
  • the position of the workpiece holders 16 relative to the straightening punch 28 can be changed on the basis of empirical values and / or algorithms developed therefrom so that the concentricity deviation or the straightness deviation can be reduced as far as possible with just one straightening process.
  • a feed and discharge device 54 is shown on the basis of a basic illustration with which a large number of workpieces 17 to be straightened can be fed to the straightening press 10 and removed from it again.
  • the feed and discharge device comprises 54 an infeed conveyor 56 comprising a hopper belt 58 and an extraction belt 60.
  • the removal belt 60 is arranged somewhat below the bunker belt 58, the bunker belt 58 protruding somewhat beyond the removal belt 60.
  • the workpieces 17 to be straightened are mass articles which can be poured onto the bunker belt 58 in a random manner.
  • the bunker belt 58 and the removal belt 60 can be moved at different speeds, which makes it possible to keep the number of workpieces 17 which are transferred from the bunker belt 58 to the removal belt 60 low. In particular, for this purpose it is also possible to stop the bunker belt 58 for a certain time while the removal belt 60 continues to run.
  • the feed and discharge device 54 comprises an image processing device 62 with which the workpieces 17 arranged on the removal belt 60 can be detected with regard to their position and orientation. This information is transmitted to the already mentioned gripping device 44, which is hereby able to remove a single workpiece 17 from the removal belt 60 and place it on the two workpiece receptacles 16 of the straightening press 10, as shown in FIG Figure 5B is shown.
  • the workpiece 17 can then be machined in the manner described above. After machining has been carried out, the machined workpiece 17 is removed from the straightening press 10 by means of the gripping device 44 and placed on a discharge unit 66 with which the machined workpiece 17 can be transported on. As from the Figure 7 is evident, the machined workpieces 17 can be placed on the discharge unit 66 in an orderly manner. In particular, it is possible to deposit the processed workpieces 17 in an orderly manner in a load carrier (not shown here) so that the processed workpieces 17 can be transported on in a space-saving manner.
  • a load carrier not shown here
  • the gripping device 44 has two gripping sections 68 so that it can grasp two workpieces 17 at the same time.
  • the gripping device 44 removes a workpiece 17 to be processed from the removal belt 60, only one gripping section 68 is occupied after the removal.
  • the gripping device 44 has reached the straightening press 10, it first removes the processed workpiece 17 with the free gripping section 68 from the workpiece receptacles 16 and then places the workpiece 17 to be processed in the workpiece receptacles 16. She then transports the machined workpiece 17 to the discharge unit 66 and deposits it there.
  • the distances to be covered by the gripping device 44 and consequently the time required can be kept short.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Straightening Metal Sheet-Like Bodies (AREA)
EP20176912.2A 2019-05-27 2020-05-27 Presse à redresser et procédé de redressage par cintrage des pièces allongées Pending EP3744436A1 (fr)

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DE102019114112.5A DE102019114112B4 (de) 2019-05-27 2019-05-27 Richtpresse und Verfahren zum Biegerichten von länglichen Werkstücken

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CN113477750A (zh) * 2021-05-31 2021-10-08 广州文冲船舶修造有限公司 一种船用艉轴弯曲变形的修复方法

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CN113492377B (zh) * 2021-06-30 2023-04-18 西安闻泰信息技术有限公司 一种矫形治具和矫形方法
DE102022210175A1 (de) 2022-09-27 2024-03-28 Volkswagen Aktiengesellschaft Verfahren zum Herstellen einer Antriebswelle, Biegerichteinrichtung und Antriebswelle

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DE202004009261U1 (de) 2004-06-14 2005-12-01 MAE Maschinen- und Apparatebau Götzen GmbH & Co. KG Vorrichtung zum automatischen Biegerichten länglicher Werkstücke
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EP2548668A1 (fr) 2011-07-20 2013-01-23 Galdabini Präzisions Maschinen AG Procédé de dressage par torsion automatique de pièces allongées et dresseuse destinée à l'exécution du procédé

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DE2745874A1 (de) 1977-01-21 1978-07-27 Renzo Dr Ing Galdabini Automatische richtpresse
JPS61189820A (ja) * 1985-02-15 1986-08-23 Sumitomo Metal Ind Ltd 管の矯正機
DE3929397A1 (de) 1989-09-05 1991-03-07 Mae Maschinen U Apparatebau Go Automatische biegerichtmaschine
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DE202004009261U1 (de) 2004-06-14 2005-12-01 MAE Maschinen- und Apparatebau Götzen GmbH & Co. KG Vorrichtung zum automatischen Biegerichten länglicher Werkstücke
DE202006008001U1 (de) * 2006-05-17 2007-09-27 MAE Maschinen- und Apparatebau Götzen GmbH & Co. KG Biegerichtmaschine für längliche Werkstücke
DE202010011976U1 (de) * 2010-08-30 2011-12-01 MAE Maschinen- u. Apparatebau Götzen GmbH Biegerichtmaschine für ein langes Werkstück und Zu- und Abfördervorrichtung hierfür
EP2548668A1 (fr) 2011-07-20 2013-01-23 Galdabini Präzisions Maschinen AG Procédé de dressage par torsion automatique de pièces allongées et dresseuse destinée à l'exécution du procédé

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Publication number Priority date Publication date Assignee Title
CN113477750A (zh) * 2021-05-31 2021-10-08 广州文冲船舶修造有限公司 一种船用艉轴弯曲变形的修复方法

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